| 1 | /* | 
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| 2 | * Copyright © 2006-2017 Intel Corporation | 
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| 3 | * | 
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| 4 | * Permission is hereby granted, free of charge, to any person obtaining a | 
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| 5 | * copy of this software and associated documentation files (the "Software"), | 
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| 6 | * to deal in the Software without restriction, including without limitation | 
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| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | 
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| 8 | * and/or sell copies of the Software, and to permit persons to whom the | 
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| 9 | * Software is furnished to do so, subject to the following conditions: | 
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| 10 | * | 
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| 11 | * The above copyright notice and this permission notice (including the next | 
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| 12 | * paragraph) shall be included in all copies or substantial portions of the | 
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| 13 | * Software. | 
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| 14 | * | 
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| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | 
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| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | 
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| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL | 
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| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | 
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| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | 
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| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | 
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| 21 | * DEALINGS IN THE SOFTWARE. | 
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| 22 | */ | 
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| 23 |  | 
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| 24 | #include <linux/debugfs.h> | 
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| 25 | #include <linux/iopoll.h> | 
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| 26 | #include <linux/time.h> | 
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| 27 |  | 
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| 28 | #include <drm/drm_fixed.h> | 
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| 29 |  | 
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| 30 | #include "soc/intel_dram.h" | 
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| 31 |  | 
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| 32 | #include "hsw_ips.h" | 
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| 33 | #include "i915_drv.h" | 
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| 34 | #include "i915_reg.h" | 
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| 35 | #include "i915_utils.h" | 
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| 36 | #include "intel_atomic.h" | 
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| 37 | #include "intel_audio.h" | 
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| 38 | #include "intel_bw.h" | 
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| 39 | #include "intel_cdclk.h" | 
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| 40 | #include "intel_crtc.h" | 
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| 41 | #include "intel_de.h" | 
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| 42 | #include "intel_display_regs.h" | 
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| 43 | #include "intel_display_types.h" | 
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| 44 | #include "intel_mchbar_regs.h" | 
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| 45 | #include "intel_pci_config.h" | 
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| 46 | #include "intel_pcode.h" | 
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| 47 | #include "intel_plane.h" | 
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| 48 | #include "intel_psr.h" | 
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| 49 | #include "intel_vdsc.h" | 
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| 50 | #include "skl_watermark.h" | 
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| 51 | #include "skl_watermark_regs.h" | 
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| 52 | #include "vlv_dsi.h" | 
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| 53 | #include "vlv_sideband.h" | 
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| 54 |  | 
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| 55 | /** | 
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| 56 | * DOC: CDCLK / RAWCLK | 
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| 57 | * | 
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| 58 | * The display engine uses several different clocks to do its work. There | 
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| 59 | * are two main clocks involved that aren't directly related to the actual | 
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| 60 | * pixel clock or any symbol/bit clock of the actual output port. These | 
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| 61 | * are the core display clock (CDCLK) and RAWCLK. | 
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| 62 | * | 
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| 63 | * CDCLK clocks most of the display pipe logic, and thus its frequency | 
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| 64 | * must be high enough to support the rate at which pixels are flowing | 
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| 65 | * through the pipes. Downscaling must also be accounted as that increases | 
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| 66 | * the effective pixel rate. | 
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| 67 | * | 
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| 68 | * On several platforms the CDCLK frequency can be changed dynamically | 
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| 69 | * to minimize power consumption for a given display configuration. | 
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| 70 | * Typically changes to the CDCLK frequency require all the display pipes | 
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| 71 | * to be shut down while the frequency is being changed. | 
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| 72 | * | 
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| 73 | * On SKL+ the DMC will toggle the CDCLK off/on during DC5/6 entry/exit. | 
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| 74 | * DMC will not change the active CDCLK frequency however, so that part | 
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| 75 | * will still be performed by the driver directly. | 
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| 76 | * | 
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| 77 | * There are multiple components involved in the generation of the CDCLK | 
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| 78 | * frequency: | 
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| 79 | * | 
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| 80 | * - We have the CDCLK PLL, which generates an output clock based on a | 
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| 81 | *   reference clock and a ratio parameter. | 
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| 82 | * - The CD2X Divider, which divides the output of the PLL based on a | 
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| 83 | *   divisor selected from a set of pre-defined choices. | 
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| 84 | * - The CD2X Squasher, which further divides the output based on a | 
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| 85 | *   waveform represented as a sequence of bits where each zero | 
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| 86 | *   "squashes out" a clock cycle. | 
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| 87 | * - And, finally, a fixed divider that divides the output frequency by 2. | 
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| 88 | * | 
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| 89 | * As such, the resulting CDCLK frequency can be calculated with the | 
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| 90 | * following formula: | 
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| 91 | * | 
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| 92 | *     cdclk = vco / cd2x_div / (sq_len / sq_div) / 2 | 
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| 93 | * | 
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| 94 | * , where vco is the frequency generated by the PLL; cd2x_div | 
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| 95 | * represents the CD2X Divider; sq_len and sq_div are the bit length | 
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| 96 | * and the number of high bits for the CD2X Squasher waveform, respectively; | 
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| 97 | * and 2 represents the fixed divider. | 
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| 98 | * | 
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| 99 | * Note that some older platforms do not contain the CD2X Divider | 
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| 100 | * and/or CD2X Squasher, in which case we can ignore their respective | 
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| 101 | * factors in the formula above. | 
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| 102 | * | 
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| 103 | * Several methods exist to change the CDCLK frequency, which ones are | 
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| 104 | * supported depends on the platform: | 
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| 105 | * | 
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| 106 | * - Full PLL disable + re-enable with new VCO frequency. Pipes must be inactive. | 
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| 107 | * - CD2X divider update. Single pipe can be active as the divider update | 
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| 108 | *   can be synchronized with the pipe's start of vblank. | 
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| 109 | * - Crawl the PLL smoothly to the new VCO frequency. Pipes can be active. | 
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| 110 | * - Squash waveform update. Pipes can be active. | 
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| 111 | * - Crawl and squash can also be done back to back. Pipes can be active. | 
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| 112 | * | 
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| 113 | * RAWCLK is a fixed frequency clock, often used by various auxiliary | 
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| 114 | * blocks such as AUX CH or backlight PWM. Hence the only thing we | 
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| 115 | * really need to know about RAWCLK is its frequency so that various | 
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| 116 | * dividers can be programmed correctly. | 
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| 117 | */ | 
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| 118 |  | 
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| 119 | struct intel_cdclk_state { | 
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| 120 | struct intel_global_state base; | 
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| 121 |  | 
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| 122 | /* | 
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| 123 | * Logical configuration of cdclk (used for all scaling, | 
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| 124 | * watermark, etc. calculations and checks). This is | 
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| 125 | * computed as if all enabled crtcs were active. | 
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| 126 | */ | 
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| 127 | struct intel_cdclk_config logical; | 
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| 128 |  | 
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| 129 | /* | 
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| 130 | * Actual configuration of cdclk, can be different from the | 
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| 131 | * logical configuration only when all crtc's are DPMS off. | 
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| 132 | */ | 
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| 133 | struct intel_cdclk_config actual; | 
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| 134 |  | 
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| 135 | /* minimum acceptable cdclk to satisfy bandwidth requirements */ | 
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| 136 | int bw_min_cdclk; | 
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| 137 | /* minimum acceptable cdclk for each pipe */ | 
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| 138 | int min_cdclk[I915_MAX_PIPES]; | 
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| 139 | /* minimum acceptable voltage level for each pipe */ | 
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| 140 | u8 min_voltage_level[I915_MAX_PIPES]; | 
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| 141 |  | 
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| 142 | /* pipe to which cd2x update is synchronized */ | 
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| 143 | enum pipe pipe; | 
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| 144 |  | 
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| 145 | /* forced minimum cdclk for glk+ audio w/a */ | 
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| 146 | int force_min_cdclk; | 
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| 147 |  | 
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| 148 | /* bitmask of active pipes */ | 
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| 149 | u8 active_pipes; | 
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| 150 |  | 
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| 151 | /* update cdclk with pipes disabled */ | 
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| 152 | bool disable_pipes; | 
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| 153 | }; | 
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| 154 |  | 
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| 155 | struct intel_cdclk_funcs { | 
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| 156 | void (*get_cdclk)(struct intel_display *display, | 
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| 157 | struct intel_cdclk_config *cdclk_config); | 
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| 158 | void (*set_cdclk)(struct intel_display *display, | 
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| 159 | const struct intel_cdclk_config *cdclk_config, | 
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| 160 | enum pipe pipe); | 
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| 161 | int (*modeset_calc_cdclk)(struct intel_atomic_state *state); | 
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| 162 | u8 (*calc_voltage_level)(int cdclk); | 
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| 163 | }; | 
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| 164 |  | 
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| 165 | void intel_cdclk_get_cdclk(struct intel_display *display, | 
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| 166 | struct intel_cdclk_config *cdclk_config) | 
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| 167 | { | 
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| 168 | display->funcs.cdclk->get_cdclk(display, cdclk_config); | 
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| 169 | } | 
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| 170 |  | 
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| 171 | static void intel_cdclk_set_cdclk(struct intel_display *display, | 
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| 172 | const struct intel_cdclk_config *cdclk_config, | 
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| 173 | enum pipe pipe) | 
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| 174 | { | 
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| 175 | display->funcs.cdclk->set_cdclk(display, cdclk_config, pipe); | 
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| 176 | } | 
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| 177 |  | 
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| 178 | static int intel_cdclk_modeset_calc_cdclk(struct intel_atomic_state *state) | 
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| 179 | { | 
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| 180 | struct intel_display *display = to_intel_display(state); | 
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| 181 |  | 
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| 182 | return display->funcs.cdclk->modeset_calc_cdclk(state); | 
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| 183 | } | 
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| 184 |  | 
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| 185 | static u8 intel_cdclk_calc_voltage_level(struct intel_display *display, | 
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| 186 | int cdclk) | 
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| 187 | { | 
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| 188 | return display->funcs.cdclk->calc_voltage_level(cdclk); | 
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| 189 | } | 
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| 190 |  | 
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| 191 | static void fixed_133mhz_get_cdclk(struct intel_display *display, | 
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| 192 | struct intel_cdclk_config *cdclk_config) | 
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| 193 | { | 
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| 194 | cdclk_config->cdclk = 133333; | 
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| 195 | } | 
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| 196 |  | 
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| 197 | static void fixed_200mhz_get_cdclk(struct intel_display *display, | 
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| 198 | struct intel_cdclk_config *cdclk_config) | 
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| 199 | { | 
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| 200 | cdclk_config->cdclk = 200000; | 
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| 201 | } | 
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| 202 |  | 
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| 203 | static void fixed_266mhz_get_cdclk(struct intel_display *display, | 
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| 204 | struct intel_cdclk_config *cdclk_config) | 
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| 205 | { | 
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| 206 | cdclk_config->cdclk = 266667; | 
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| 207 | } | 
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| 208 |  | 
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| 209 | static void fixed_333mhz_get_cdclk(struct intel_display *display, | 
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| 210 | struct intel_cdclk_config *cdclk_config) | 
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| 211 | { | 
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| 212 | cdclk_config->cdclk = 333333; | 
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| 213 | } | 
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| 214 |  | 
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| 215 | static void fixed_400mhz_get_cdclk(struct intel_display *display, | 
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| 216 | struct intel_cdclk_config *cdclk_config) | 
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| 217 | { | 
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| 218 | cdclk_config->cdclk = 400000; | 
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| 219 | } | 
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| 220 |  | 
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| 221 | static void fixed_450mhz_get_cdclk(struct intel_display *display, | 
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| 222 | struct intel_cdclk_config *cdclk_config) | 
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| 223 | { | 
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| 224 | cdclk_config->cdclk = 450000; | 
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| 225 | } | 
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| 226 |  | 
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| 227 | static void i85x_get_cdclk(struct intel_display *display, | 
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| 228 | struct intel_cdclk_config *cdclk_config) | 
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| 229 | { | 
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| 230 | struct pci_dev *pdev = to_pci_dev(display->drm->dev); | 
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| 231 | u16 hpllcc = 0; | 
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| 232 |  | 
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| 233 | /* | 
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| 234 | * 852GM/852GMV only supports 133 MHz and the HPLLCC | 
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| 235 | * encoding is different :( | 
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| 236 | * FIXME is this the right way to detect 852GM/852GMV? | 
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| 237 | */ | 
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| 238 | if (pdev->revision == 0x1) { | 
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| 239 | cdclk_config->cdclk = 133333; | 
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| 240 | return; | 
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| 241 | } | 
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| 242 |  | 
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| 243 | pci_bus_read_config_word(bus: pdev->bus, | 
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| 244 | PCI_DEVFN(0, 3), HPLLCC, val: &hpllcc); | 
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| 245 |  | 
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| 246 | /* Assume that the hardware is in the high speed state.  This | 
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| 247 | * should be the default. | 
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| 248 | */ | 
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| 249 | switch (hpllcc & GC_CLOCK_CONTROL_MASK) { | 
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| 250 | case GC_CLOCK_133_200: | 
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| 251 | case GC_CLOCK_133_200_2: | 
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| 252 | case GC_CLOCK_100_200: | 
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| 253 | cdclk_config->cdclk = 200000; | 
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| 254 | break; | 
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| 255 | case GC_CLOCK_166_250: | 
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| 256 | cdclk_config->cdclk = 250000; | 
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| 257 | break; | 
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| 258 | case GC_CLOCK_100_133: | 
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| 259 | cdclk_config->cdclk = 133333; | 
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| 260 | break; | 
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| 261 | case GC_CLOCK_133_266: | 
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| 262 | case GC_CLOCK_133_266_2: | 
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| 263 | case GC_CLOCK_166_266: | 
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| 264 | cdclk_config->cdclk = 266667; | 
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| 265 | break; | 
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| 266 | } | 
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| 267 | } | 
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| 268 |  | 
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| 269 | static void i915gm_get_cdclk(struct intel_display *display, | 
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| 270 | struct intel_cdclk_config *cdclk_config) | 
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| 271 | { | 
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| 272 | struct pci_dev *pdev = to_pci_dev(display->drm->dev); | 
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| 273 | u16 gcfgc = 0; | 
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| 274 |  | 
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| 275 | pci_read_config_word(dev: pdev, GCFGC, val: &gcfgc); | 
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| 276 |  | 
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| 277 | if (gcfgc & GC_LOW_FREQUENCY_ENABLE) { | 
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| 278 | cdclk_config->cdclk = 133333; | 
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| 279 | return; | 
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| 280 | } | 
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| 281 |  | 
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| 282 | switch (gcfgc & GC_DISPLAY_CLOCK_MASK) { | 
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| 283 | case GC_DISPLAY_CLOCK_333_320_MHZ: | 
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| 284 | cdclk_config->cdclk = 333333; | 
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| 285 | break; | 
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| 286 | default: | 
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| 287 | case GC_DISPLAY_CLOCK_190_200_MHZ: | 
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| 288 | cdclk_config->cdclk = 190000; | 
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| 289 | break; | 
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| 290 | } | 
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| 291 | } | 
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| 292 |  | 
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| 293 | static void i945gm_get_cdclk(struct intel_display *display, | 
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| 294 | struct intel_cdclk_config *cdclk_config) | 
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| 295 | { | 
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| 296 | struct pci_dev *pdev = to_pci_dev(display->drm->dev); | 
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| 297 | u16 gcfgc = 0; | 
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| 298 |  | 
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| 299 | pci_read_config_word(dev: pdev, GCFGC, val: &gcfgc); | 
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| 300 |  | 
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| 301 | if (gcfgc & GC_LOW_FREQUENCY_ENABLE) { | 
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| 302 | cdclk_config->cdclk = 133333; | 
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| 303 | return; | 
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| 304 | } | 
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| 305 |  | 
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| 306 | switch (gcfgc & GC_DISPLAY_CLOCK_MASK) { | 
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| 307 | case GC_DISPLAY_CLOCK_333_320_MHZ: | 
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| 308 | cdclk_config->cdclk = 320000; | 
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| 309 | break; | 
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| 310 | default: | 
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| 311 | case GC_DISPLAY_CLOCK_190_200_MHZ: | 
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| 312 | cdclk_config->cdclk = 200000; | 
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| 313 | break; | 
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| 314 | } | 
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| 315 | } | 
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| 316 |  | 
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| 317 | static unsigned int intel_hpll_vco(struct intel_display *display) | 
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| 318 | { | 
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| 319 | static const unsigned int blb_vco[8] = { | 
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| 320 | [0] = 3200000, | 
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| 321 | [1] = 4000000, | 
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| 322 | [2] = 5333333, | 
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| 323 | [3] = 4800000, | 
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| 324 | [4] = 6400000, | 
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| 325 | }; | 
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| 326 | static const unsigned int pnv_vco[8] = { | 
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| 327 | [0] = 3200000, | 
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| 328 | [1] = 4000000, | 
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| 329 | [2] = 5333333, | 
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| 330 | [3] = 4800000, | 
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| 331 | [4] = 2666667, | 
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| 332 | }; | 
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| 333 | static const unsigned int cl_vco[8] = { | 
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| 334 | [0] = 3200000, | 
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| 335 | [1] = 4000000, | 
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| 336 | [2] = 5333333, | 
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| 337 | [3] = 6400000, | 
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| 338 | [4] = 3333333, | 
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| 339 | [5] = 3566667, | 
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| 340 | [6] = 4266667, | 
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| 341 | }; | 
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| 342 | static const unsigned int elk_vco[8] = { | 
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| 343 | [0] = 3200000, | 
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| 344 | [1] = 4000000, | 
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| 345 | [2] = 5333333, | 
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| 346 | [3] = 4800000, | 
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| 347 | }; | 
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| 348 | static const unsigned int ctg_vco[8] = { | 
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| 349 | [0] = 3200000, | 
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| 350 | [1] = 4000000, | 
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| 351 | [2] = 5333333, | 
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| 352 | [3] = 6400000, | 
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| 353 | [4] = 2666667, | 
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| 354 | [5] = 4266667, | 
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| 355 | }; | 
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| 356 | const unsigned int *vco_table; | 
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| 357 | unsigned int vco; | 
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| 358 | u8 tmp = 0; | 
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| 359 |  | 
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| 360 | /* FIXME other chipsets? */ | 
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| 361 | if (display->platform.gm45) | 
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| 362 | vco_table = ctg_vco; | 
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| 363 | else if (display->platform.g45) | 
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| 364 | vco_table = elk_vco; | 
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| 365 | else if (display->platform.i965gm) | 
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| 366 | vco_table = cl_vco; | 
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| 367 | else if (display->platform.pineview) | 
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| 368 | vco_table = pnv_vco; | 
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| 369 | else if (display->platform.g33) | 
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| 370 | vco_table = blb_vco; | 
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| 371 | else | 
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| 372 | return 0; | 
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| 373 |  | 
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| 374 | tmp = intel_de_read(display, reg: display->platform.pineview || | 
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| 375 | display->platform.mobile ? HPLLVCO_MOBILE : HPLLVCO); | 
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| 376 |  | 
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| 377 | vco = vco_table[tmp & 0x7]; | 
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| 378 | if (vco == 0) | 
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| 379 | drm_err(display->drm, "Bad HPLL VCO (HPLLVCO=0x%02x)\n", | 
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| 380 | tmp); | 
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| 381 | else | 
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| 382 | drm_dbg_kms(display->drm, "HPLL VCO %u kHz\n", vco); | 
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| 383 |  | 
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| 384 | return vco; | 
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| 385 | } | 
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| 386 |  | 
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| 387 | static void g33_get_cdclk(struct intel_display *display, | 
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| 388 | struct intel_cdclk_config *cdclk_config) | 
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| 389 | { | 
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| 390 | struct pci_dev *pdev = to_pci_dev(display->drm->dev); | 
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| 391 | static const u8 div_3200[] = { 12, 10,  8,  7, 5, 16 }; | 
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| 392 | static const u8 div_4000[] = { 14, 12, 10,  8, 6, 20 }; | 
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| 393 | static const u8 div_4800[] = { 20, 14, 12, 10, 8, 24 }; | 
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| 394 | static const u8 div_5333[] = { 20, 16, 12, 12, 8, 28 }; | 
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| 395 | const u8 *div_table; | 
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| 396 | unsigned int cdclk_sel; | 
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| 397 | u16 tmp = 0; | 
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| 398 |  | 
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| 399 | cdclk_config->vco = intel_hpll_vco(display); | 
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| 400 |  | 
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| 401 | pci_read_config_word(dev: pdev, GCFGC, val: &tmp); | 
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| 402 |  | 
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| 403 | cdclk_sel = (tmp >> 4) & 0x7; | 
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| 404 |  | 
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| 405 | if (cdclk_sel >= ARRAY_SIZE(div_3200)) | 
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| 406 | goto fail; | 
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| 407 |  | 
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| 408 | switch (cdclk_config->vco) { | 
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| 409 | case 3200000: | 
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| 410 | div_table = div_3200; | 
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| 411 | break; | 
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| 412 | case 4000000: | 
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| 413 | div_table = div_4000; | 
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| 414 | break; | 
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| 415 | case 4800000: | 
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| 416 | div_table = div_4800; | 
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| 417 | break; | 
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| 418 | case 5333333: | 
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| 419 | div_table = div_5333; | 
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| 420 | break; | 
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| 421 | default: | 
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| 422 | goto fail; | 
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| 423 | } | 
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| 424 |  | 
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| 425 | cdclk_config->cdclk = DIV_ROUND_CLOSEST(cdclk_config->vco, | 
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| 426 | div_table[cdclk_sel]); | 
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| 427 | return; | 
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| 428 |  | 
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| 429 | fail: | 
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| 430 | drm_err(display->drm, | 
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| 431 | "Unable to determine CDCLK. HPLL VCO=%u kHz, CFGC=0x%08x\n", | 
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| 432 | cdclk_config->vco, tmp); | 
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| 433 | cdclk_config->cdclk = 190476; | 
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| 434 | } | 
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| 435 |  | 
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| 436 | static void pnv_get_cdclk(struct intel_display *display, | 
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| 437 | struct intel_cdclk_config *cdclk_config) | 
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| 438 | { | 
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| 439 | struct pci_dev *pdev = to_pci_dev(display->drm->dev); | 
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| 440 | u16 gcfgc = 0; | 
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| 441 |  | 
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| 442 | pci_read_config_word(dev: pdev, GCFGC, val: &gcfgc); | 
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| 443 |  | 
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| 444 | switch (gcfgc & GC_DISPLAY_CLOCK_MASK) { | 
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| 445 | case GC_DISPLAY_CLOCK_267_MHZ_PNV: | 
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| 446 | cdclk_config->cdclk = 266667; | 
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| 447 | break; | 
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| 448 | case GC_DISPLAY_CLOCK_333_MHZ_PNV: | 
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| 449 | cdclk_config->cdclk = 333333; | 
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| 450 | break; | 
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| 451 | case GC_DISPLAY_CLOCK_444_MHZ_PNV: | 
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| 452 | cdclk_config->cdclk = 444444; | 
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| 453 | break; | 
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| 454 | case GC_DISPLAY_CLOCK_200_MHZ_PNV: | 
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| 455 | cdclk_config->cdclk = 200000; | 
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| 456 | break; | 
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| 457 | default: | 
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| 458 | drm_err(display->drm, | 
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| 459 | "Unknown pnv display core clock 0x%04x\n", gcfgc); | 
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| 460 | fallthrough; | 
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| 461 | case GC_DISPLAY_CLOCK_133_MHZ_PNV: | 
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| 462 | cdclk_config->cdclk = 133333; | 
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| 463 | break; | 
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| 464 | case GC_DISPLAY_CLOCK_167_MHZ_PNV: | 
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| 465 | cdclk_config->cdclk = 166667; | 
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| 466 | break; | 
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| 467 | } | 
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| 468 | } | 
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| 469 |  | 
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| 470 | static void i965gm_get_cdclk(struct intel_display *display, | 
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| 471 | struct intel_cdclk_config *cdclk_config) | 
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| 472 | { | 
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| 473 | struct pci_dev *pdev = to_pci_dev(display->drm->dev); | 
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| 474 | static const u8 div_3200[] = { 16, 10,  8 }; | 
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| 475 | static const u8 div_4000[] = { 20, 12, 10 }; | 
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| 476 | static const u8 div_5333[] = { 24, 16, 14 }; | 
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| 477 | const u8 *div_table; | 
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| 478 | unsigned int cdclk_sel; | 
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| 479 | u16 tmp = 0; | 
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| 480 |  | 
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| 481 | cdclk_config->vco = intel_hpll_vco(display); | 
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| 482 |  | 
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| 483 | pci_read_config_word(dev: pdev, GCFGC, val: &tmp); | 
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| 484 |  | 
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| 485 | cdclk_sel = ((tmp >> 8) & 0x1f) - 1; | 
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| 486 |  | 
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| 487 | if (cdclk_sel >= ARRAY_SIZE(div_3200)) | 
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| 488 | goto fail; | 
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| 489 |  | 
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| 490 | switch (cdclk_config->vco) { | 
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| 491 | case 3200000: | 
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| 492 | div_table = div_3200; | 
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| 493 | break; | 
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| 494 | case 4000000: | 
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| 495 | div_table = div_4000; | 
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| 496 | break; | 
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| 497 | case 5333333: | 
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| 498 | div_table = div_5333; | 
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| 499 | break; | 
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| 500 | default: | 
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| 501 | goto fail; | 
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| 502 | } | 
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| 503 |  | 
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| 504 | cdclk_config->cdclk = DIV_ROUND_CLOSEST(cdclk_config->vco, | 
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| 505 | div_table[cdclk_sel]); | 
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| 506 | return; | 
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| 507 |  | 
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| 508 | fail: | 
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| 509 | drm_err(display->drm, | 
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| 510 | "Unable to determine CDCLK. HPLL VCO=%u kHz, CFGC=0x%04x\n", | 
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| 511 | cdclk_config->vco, tmp); | 
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| 512 | cdclk_config->cdclk = 200000; | 
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| 513 | } | 
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| 514 |  | 
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| 515 | static void gm45_get_cdclk(struct intel_display *display, | 
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| 516 | struct intel_cdclk_config *cdclk_config) | 
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| 517 | { | 
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| 518 | struct pci_dev *pdev = to_pci_dev(display->drm->dev); | 
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| 519 | unsigned int cdclk_sel; | 
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| 520 | u16 tmp = 0; | 
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| 521 |  | 
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| 522 | cdclk_config->vco = intel_hpll_vco(display); | 
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| 523 |  | 
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| 524 | pci_read_config_word(dev: pdev, GCFGC, val: &tmp); | 
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| 525 |  | 
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| 526 | cdclk_sel = (tmp >> 12) & 0x1; | 
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| 527 |  | 
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| 528 | switch (cdclk_config->vco) { | 
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| 529 | case 2666667: | 
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| 530 | case 4000000: | 
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| 531 | case 5333333: | 
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| 532 | cdclk_config->cdclk = cdclk_sel ? 333333 : 222222; | 
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| 533 | break; | 
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| 534 | case 3200000: | 
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| 535 | cdclk_config->cdclk = cdclk_sel ? 320000 : 228571; | 
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| 536 | break; | 
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| 537 | default: | 
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| 538 | drm_err(display->drm, | 
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| 539 | "Unable to determine CDCLK. HPLL VCO=%u, CFGC=0x%04x\n", | 
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| 540 | cdclk_config->vco, tmp); | 
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| 541 | cdclk_config->cdclk = 222222; | 
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| 542 | break; | 
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| 543 | } | 
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| 544 | } | 
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| 545 |  | 
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| 546 | static void hsw_get_cdclk(struct intel_display *display, | 
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| 547 | struct intel_cdclk_config *cdclk_config) | 
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| 548 | { | 
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| 549 | u32 lcpll = intel_de_read(display, LCPLL_CTL); | 
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| 550 | u32 freq = lcpll & LCPLL_CLK_FREQ_MASK; | 
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| 551 |  | 
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| 552 | if (lcpll & LCPLL_CD_SOURCE_FCLK) | 
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| 553 | cdclk_config->cdclk = 800000; | 
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| 554 | else if (intel_de_read(display, FUSE_STRAP) & HSW_CDCLK_LIMIT) | 
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| 555 | cdclk_config->cdclk = 450000; | 
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| 556 | else if (freq == LCPLL_CLK_FREQ_450) | 
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| 557 | cdclk_config->cdclk = 450000; | 
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| 558 | else if (display->platform.haswell_ult) | 
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| 559 | cdclk_config->cdclk = 337500; | 
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| 560 | else | 
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| 561 | cdclk_config->cdclk = 540000; | 
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| 562 | } | 
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| 563 |  | 
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| 564 | static int vlv_calc_cdclk(struct intel_display *display, int min_cdclk) | 
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| 565 | { | 
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| 566 | struct drm_i915_private *dev_priv = to_i915(dev: display->drm); | 
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| 567 | int freq_320 = (dev_priv->hpll_freq <<  1) % 320000 != 0 ? | 
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| 568 | 333333 : 320000; | 
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| 569 |  | 
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| 570 | /* | 
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| 571 | * We seem to get an unstable or solid color picture at 200MHz. | 
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| 572 | * Not sure what's wrong. For now use 200MHz only when all pipes | 
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| 573 | * are off. | 
|---|
| 574 | */ | 
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| 575 | if (display->platform.valleyview && min_cdclk > freq_320) | 
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| 576 | return 400000; | 
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| 577 | else if (min_cdclk > 266667) | 
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| 578 | return freq_320; | 
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| 579 | else if (min_cdclk > 0) | 
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| 580 | return 266667; | 
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| 581 | else | 
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| 582 | return 200000; | 
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| 583 | } | 
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| 584 |  | 
|---|
| 585 | static u8 vlv_calc_voltage_level(struct intel_display *display, int cdclk) | 
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| 586 | { | 
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| 587 | struct drm_i915_private *dev_priv = to_i915(dev: display->drm); | 
|---|
| 588 |  | 
|---|
| 589 | if (display->platform.valleyview) { | 
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| 590 | if (cdclk >= 320000) /* jump to highest voltage for 400MHz too */ | 
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| 591 | return 2; | 
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| 592 | else if (cdclk >= 266667) | 
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| 593 | return 1; | 
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| 594 | else | 
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| 595 | return 0; | 
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| 596 | } else { | 
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| 597 | /* | 
|---|
| 598 | * Specs are full of misinformation, but testing on actual | 
|---|
| 599 | * hardware has shown that we just need to write the desired | 
|---|
| 600 | * CCK divider into the Punit register. | 
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| 601 | */ | 
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| 602 | return DIV_ROUND_CLOSEST(dev_priv->hpll_freq << 1, cdclk) - 1; | 
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| 603 | } | 
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| 604 | } | 
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| 605 |  | 
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| 606 | static void vlv_get_cdclk(struct intel_display *display, | 
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| 607 | struct intel_cdclk_config *cdclk_config) | 
|---|
| 608 | { | 
|---|
| 609 | u32 val; | 
|---|
| 610 |  | 
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| 611 | vlv_iosf_sb_get(drm: display->drm, BIT(VLV_IOSF_SB_CCK) | BIT(VLV_IOSF_SB_PUNIT)); | 
|---|
| 612 |  | 
|---|
| 613 | cdclk_config->vco = vlv_get_hpll_vco(drm: display->drm); | 
|---|
| 614 | cdclk_config->cdclk = vlv_get_cck_clock(drm: display->drm, name: "cdclk", | 
|---|
| 615 | CCK_DISPLAY_CLOCK_CONTROL, | 
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| 616 | ref_freq: cdclk_config->vco); | 
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| 617 |  | 
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| 618 | val = vlv_punit_read(drm: display->drm, PUNIT_REG_DSPSSPM); | 
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| 619 |  | 
|---|
| 620 | vlv_iosf_sb_put(drm: display->drm, | 
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| 621 | BIT(VLV_IOSF_SB_CCK) | BIT(VLV_IOSF_SB_PUNIT)); | 
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| 622 |  | 
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| 623 | if (display->platform.valleyview) | 
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| 624 | cdclk_config->voltage_level = (val & DSPFREQGUAR_MASK) >> | 
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| 625 | DSPFREQGUAR_SHIFT; | 
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| 626 | else | 
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| 627 | cdclk_config->voltage_level = (val & DSPFREQGUAR_MASK_CHV) >> | 
|---|
| 628 | DSPFREQGUAR_SHIFT_CHV; | 
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| 629 | } | 
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| 630 |  | 
|---|
| 631 | static void vlv_program_pfi_credits(struct intel_display *display) | 
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| 632 | { | 
|---|
| 633 | struct drm_i915_private *dev_priv = to_i915(dev: display->drm); | 
|---|
| 634 | unsigned int credits, default_credits; | 
|---|
| 635 |  | 
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| 636 | if (display->platform.cherryview) | 
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| 637 | default_credits = PFI_CREDIT(12); | 
|---|
| 638 | else | 
|---|
| 639 | default_credits = PFI_CREDIT(8); | 
|---|
| 640 |  | 
|---|
| 641 | if (display->cdclk.hw.cdclk >= dev_priv->czclk_freq) { | 
|---|
| 642 | /* CHV suggested value is 31 or 63 */ | 
|---|
| 643 | if (display->platform.cherryview) | 
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| 644 | credits = PFI_CREDIT_63; | 
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| 645 | else | 
|---|
| 646 | credits = PFI_CREDIT(15); | 
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| 647 | } else { | 
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| 648 | credits = default_credits; | 
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| 649 | } | 
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| 650 |  | 
|---|
| 651 | /* | 
|---|
| 652 | * WA - write default credits before re-programming | 
|---|
| 653 | * FIXME: should we also set the resend bit here? | 
|---|
| 654 | */ | 
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| 655 | intel_de_write(display, GCI_CONTROL, | 
|---|
| 656 | VGA_FAST_MODE_DISABLE | default_credits); | 
|---|
| 657 |  | 
|---|
| 658 | intel_de_write(display, GCI_CONTROL, | 
|---|
| 659 | VGA_FAST_MODE_DISABLE | credits | PFI_CREDIT_RESEND); | 
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| 660 |  | 
|---|
| 661 | /* | 
|---|
| 662 | * FIXME is this guaranteed to clear | 
|---|
| 663 | * immediately or should we poll for it? | 
|---|
| 664 | */ | 
|---|
| 665 | drm_WARN_ON(display->drm, | 
|---|
| 666 | intel_de_read(display, GCI_CONTROL) & PFI_CREDIT_RESEND); | 
|---|
| 667 | } | 
|---|
| 668 |  | 
|---|
| 669 | static void vlv_set_cdclk(struct intel_display *display, | 
|---|
| 670 | const struct intel_cdclk_config *cdclk_config, | 
|---|
| 671 | enum pipe pipe) | 
|---|
| 672 | { | 
|---|
| 673 | struct drm_i915_private *dev_priv = to_i915(dev: display->drm); | 
|---|
| 674 | int cdclk = cdclk_config->cdclk; | 
|---|
| 675 | u32 val, cmd = cdclk_config->voltage_level; | 
|---|
| 676 | intel_wakeref_t wakeref; | 
|---|
| 677 | int ret; | 
|---|
| 678 |  | 
|---|
| 679 | switch (cdclk) { | 
|---|
| 680 | case 400000: | 
|---|
| 681 | case 333333: | 
|---|
| 682 | case 320000: | 
|---|
| 683 | case 266667: | 
|---|
| 684 | case 200000: | 
|---|
| 685 | break; | 
|---|
| 686 | default: | 
|---|
| 687 | MISSING_CASE(cdclk); | 
|---|
| 688 | return; | 
|---|
| 689 | } | 
|---|
| 690 |  | 
|---|
| 691 | /* There are cases where we can end up here with power domains | 
|---|
| 692 | * off and a CDCLK frequency other than the minimum, like when | 
|---|
| 693 | * issuing a modeset without actually changing any display after | 
|---|
| 694 | * a system suspend.  So grab the display core domain, which covers | 
|---|
| 695 | * the HW blocks needed for the following programming. | 
|---|
| 696 | */ | 
|---|
| 697 | wakeref = intel_display_power_get(display, domain: POWER_DOMAIN_DISPLAY_CORE); | 
|---|
| 698 |  | 
|---|
| 699 | vlv_iosf_sb_get(drm: display->drm, | 
|---|
| 700 | BIT(VLV_IOSF_SB_CCK) | | 
|---|
| 701 | BIT(VLV_IOSF_SB_BUNIT) | | 
|---|
| 702 | BIT(VLV_IOSF_SB_PUNIT)); | 
|---|
| 703 |  | 
|---|
| 704 | val = vlv_punit_read(drm: display->drm, PUNIT_REG_DSPSSPM); | 
|---|
| 705 | val &= ~DSPFREQGUAR_MASK; | 
|---|
| 706 | val |= (cmd << DSPFREQGUAR_SHIFT); | 
|---|
| 707 | vlv_punit_write(drm: display->drm, PUNIT_REG_DSPSSPM, val); | 
|---|
| 708 |  | 
|---|
| 709 | ret = poll_timeout_us(val = vlv_punit_read(display->drm, PUNIT_REG_DSPSSPM), | 
|---|
| 710 | (val & DSPFREQSTAT_MASK) == (cmd << DSPFREQSTAT_SHIFT), | 
|---|
| 711 | 500, 50 * 1000, false); | 
|---|
| 712 | if (ret) | 
|---|
| 713 | drm_err(display->drm, "timed out waiting for CDCLK change\n"); | 
|---|
| 714 |  | 
|---|
| 715 | if (cdclk == 400000) { | 
|---|
| 716 | u32 divider; | 
|---|
| 717 |  | 
|---|
| 718 | divider = DIV_ROUND_CLOSEST(dev_priv->hpll_freq << 1, | 
|---|
| 719 | cdclk) - 1; | 
|---|
| 720 |  | 
|---|
| 721 | /* adjust cdclk divider */ | 
|---|
| 722 | val = vlv_cck_read(drm: display->drm, CCK_DISPLAY_CLOCK_CONTROL); | 
|---|
| 723 | val &= ~CCK_FREQUENCY_VALUES; | 
|---|
| 724 | val |= divider; | 
|---|
| 725 | vlv_cck_write(drm: display->drm, CCK_DISPLAY_CLOCK_CONTROL, val); | 
|---|
| 726 |  | 
|---|
| 727 | ret = poll_timeout_us(val = vlv_cck_read(display->drm, CCK_DISPLAY_CLOCK_CONTROL), | 
|---|
| 728 | (val & CCK_FREQUENCY_STATUS) == (divider << CCK_FREQUENCY_STATUS_SHIFT), | 
|---|
| 729 | 500, 50 * 1000, false); | 
|---|
| 730 | if (ret) | 
|---|
| 731 | drm_err(display->drm, "timed out waiting for CDCLK change\n"); | 
|---|
| 732 | } | 
|---|
| 733 |  | 
|---|
| 734 | /* adjust self-refresh exit latency value */ | 
|---|
| 735 | val = vlv_bunit_read(drm: display->drm, BUNIT_REG_BISOC); | 
|---|
| 736 | val &= ~0x7f; | 
|---|
| 737 |  | 
|---|
| 738 | /* | 
|---|
| 739 | * For high bandwidth configs, we set a higher latency in the bunit | 
|---|
| 740 | * so that the core display fetch happens in time to avoid underruns. | 
|---|
| 741 | */ | 
|---|
| 742 | if (cdclk == 400000) | 
|---|
| 743 | val |= 4500 / 250; /* 4.5 usec */ | 
|---|
| 744 | else | 
|---|
| 745 | val |= 3000 / 250; /* 3.0 usec */ | 
|---|
| 746 | vlv_bunit_write(drm: display->drm, BUNIT_REG_BISOC, val); | 
|---|
| 747 |  | 
|---|
| 748 | vlv_iosf_sb_put(drm: display->drm, | 
|---|
| 749 | BIT(VLV_IOSF_SB_CCK) | | 
|---|
| 750 | BIT(VLV_IOSF_SB_BUNIT) | | 
|---|
| 751 | BIT(VLV_IOSF_SB_PUNIT)); | 
|---|
| 752 |  | 
|---|
| 753 | intel_update_cdclk(display); | 
|---|
| 754 |  | 
|---|
| 755 | vlv_program_pfi_credits(display); | 
|---|
| 756 |  | 
|---|
| 757 | intel_display_power_put(display, domain: POWER_DOMAIN_DISPLAY_CORE, wakeref); | 
|---|
| 758 | } | 
|---|
| 759 |  | 
|---|
| 760 | static void chv_set_cdclk(struct intel_display *display, | 
|---|
| 761 | const struct intel_cdclk_config *cdclk_config, | 
|---|
| 762 | enum pipe pipe) | 
|---|
| 763 | { | 
|---|
| 764 | int cdclk = cdclk_config->cdclk; | 
|---|
| 765 | u32 val, cmd = cdclk_config->voltage_level; | 
|---|
| 766 | intel_wakeref_t wakeref; | 
|---|
| 767 | int ret; | 
|---|
| 768 |  | 
|---|
| 769 | switch (cdclk) { | 
|---|
| 770 | case 333333: | 
|---|
| 771 | case 320000: | 
|---|
| 772 | case 266667: | 
|---|
| 773 | case 200000: | 
|---|
| 774 | break; | 
|---|
| 775 | default: | 
|---|
| 776 | MISSING_CASE(cdclk); | 
|---|
| 777 | return; | 
|---|
| 778 | } | 
|---|
| 779 |  | 
|---|
| 780 | /* There are cases where we can end up here with power domains | 
|---|
| 781 | * off and a CDCLK frequency other than the minimum, like when | 
|---|
| 782 | * issuing a modeset without actually changing any display after | 
|---|
| 783 | * a system suspend.  So grab the display core domain, which covers | 
|---|
| 784 | * the HW blocks needed for the following programming. | 
|---|
| 785 | */ | 
|---|
| 786 | wakeref = intel_display_power_get(display, domain: POWER_DOMAIN_DISPLAY_CORE); | 
|---|
| 787 |  | 
|---|
| 788 | vlv_punit_get(drm: display->drm); | 
|---|
| 789 | val = vlv_punit_read(drm: display->drm, PUNIT_REG_DSPSSPM); | 
|---|
| 790 | val &= ~DSPFREQGUAR_MASK_CHV; | 
|---|
| 791 | val |= (cmd << DSPFREQGUAR_SHIFT_CHV); | 
|---|
| 792 | vlv_punit_write(drm: display->drm, PUNIT_REG_DSPSSPM, val); | 
|---|
| 793 |  | 
|---|
| 794 | ret = poll_timeout_us(val = vlv_punit_read(display->drm, PUNIT_REG_DSPSSPM), | 
|---|
| 795 | (val & DSPFREQSTAT_MASK_CHV) == (cmd << DSPFREQSTAT_SHIFT_CHV), | 
|---|
| 796 | 500, 50 * 1000, false); | 
|---|
| 797 | if (ret) | 
|---|
| 798 | drm_err(display->drm, "timed out waiting for CDCLK change\n"); | 
|---|
| 799 |  | 
|---|
| 800 | vlv_punit_put(drm: display->drm); | 
|---|
| 801 |  | 
|---|
| 802 | intel_update_cdclk(display); | 
|---|
| 803 |  | 
|---|
| 804 | vlv_program_pfi_credits(display); | 
|---|
| 805 |  | 
|---|
| 806 | intel_display_power_put(display, domain: POWER_DOMAIN_DISPLAY_CORE, wakeref); | 
|---|
| 807 | } | 
|---|
| 808 |  | 
|---|
| 809 | static int bdw_calc_cdclk(int min_cdclk) | 
|---|
| 810 | { | 
|---|
| 811 | if (min_cdclk > 540000) | 
|---|
| 812 | return 675000; | 
|---|
| 813 | else if (min_cdclk > 450000) | 
|---|
| 814 | return 540000; | 
|---|
| 815 | else if (min_cdclk > 337500) | 
|---|
| 816 | return 450000; | 
|---|
| 817 | else | 
|---|
| 818 | return 337500; | 
|---|
| 819 | } | 
|---|
| 820 |  | 
|---|
| 821 | static u8 bdw_calc_voltage_level(int cdclk) | 
|---|
| 822 | { | 
|---|
| 823 | switch (cdclk) { | 
|---|
| 824 | default: | 
|---|
| 825 | case 337500: | 
|---|
| 826 | return 2; | 
|---|
| 827 | case 450000: | 
|---|
| 828 | return 0; | 
|---|
| 829 | case 540000: | 
|---|
| 830 | return 1; | 
|---|
| 831 | case 675000: | 
|---|
| 832 | return 3; | 
|---|
| 833 | } | 
|---|
| 834 | } | 
|---|
| 835 |  | 
|---|
| 836 | static void bdw_get_cdclk(struct intel_display *display, | 
|---|
| 837 | struct intel_cdclk_config *cdclk_config) | 
|---|
| 838 | { | 
|---|
| 839 | u32 lcpll = intel_de_read(display, LCPLL_CTL); | 
|---|
| 840 | u32 freq = lcpll & LCPLL_CLK_FREQ_MASK; | 
|---|
| 841 |  | 
|---|
| 842 | if (lcpll & LCPLL_CD_SOURCE_FCLK) | 
|---|
| 843 | cdclk_config->cdclk = 800000; | 
|---|
| 844 | else if (intel_de_read(display, FUSE_STRAP) & HSW_CDCLK_LIMIT) | 
|---|
| 845 | cdclk_config->cdclk = 450000; | 
|---|
| 846 | else if (freq == LCPLL_CLK_FREQ_450) | 
|---|
| 847 | cdclk_config->cdclk = 450000; | 
|---|
| 848 | else if (freq == LCPLL_CLK_FREQ_54O_BDW) | 
|---|
| 849 | cdclk_config->cdclk = 540000; | 
|---|
| 850 | else if (freq == LCPLL_CLK_FREQ_337_5_BDW) | 
|---|
| 851 | cdclk_config->cdclk = 337500; | 
|---|
| 852 | else | 
|---|
| 853 | cdclk_config->cdclk = 675000; | 
|---|
| 854 |  | 
|---|
| 855 | /* | 
|---|
| 856 | * Can't read this out :( Let's assume it's | 
|---|
| 857 | * at least what the CDCLK frequency requires. | 
|---|
| 858 | */ | 
|---|
| 859 | cdclk_config->voltage_level = | 
|---|
| 860 | bdw_calc_voltage_level(cdclk: cdclk_config->cdclk); | 
|---|
| 861 | } | 
|---|
| 862 |  | 
|---|
| 863 | static u32 bdw_cdclk_freq_sel(int cdclk) | 
|---|
| 864 | { | 
|---|
| 865 | switch (cdclk) { | 
|---|
| 866 | default: | 
|---|
| 867 | MISSING_CASE(cdclk); | 
|---|
| 868 | fallthrough; | 
|---|
| 869 | case 337500: | 
|---|
| 870 | return LCPLL_CLK_FREQ_337_5_BDW; | 
|---|
| 871 | case 450000: | 
|---|
| 872 | return LCPLL_CLK_FREQ_450; | 
|---|
| 873 | case 540000: | 
|---|
| 874 | return LCPLL_CLK_FREQ_54O_BDW; | 
|---|
| 875 | case 675000: | 
|---|
| 876 | return LCPLL_CLK_FREQ_675_BDW; | 
|---|
| 877 | } | 
|---|
| 878 | } | 
|---|
| 879 |  | 
|---|
| 880 | static void bdw_set_cdclk(struct intel_display *display, | 
|---|
| 881 | const struct intel_cdclk_config *cdclk_config, | 
|---|
| 882 | enum pipe pipe) | 
|---|
| 883 | { | 
|---|
| 884 | int cdclk = cdclk_config->cdclk; | 
|---|
| 885 | int ret; | 
|---|
| 886 |  | 
|---|
| 887 | if (drm_WARN(display->drm, | 
|---|
| 888 | (intel_de_read(display, LCPLL_CTL) & | 
|---|
| 889 | (LCPLL_PLL_DISABLE | LCPLL_PLL_LOCK | | 
|---|
| 890 | LCPLL_CD_CLOCK_DISABLE | LCPLL_ROOT_CD_CLOCK_DISABLE | | 
|---|
| 891 | LCPLL_CD2X_CLOCK_DISABLE | LCPLL_POWER_DOWN_ALLOW | | 
|---|
| 892 | LCPLL_CD_SOURCE_FCLK)) != LCPLL_PLL_LOCK, | 
|---|
| 893 | "trying to change cdclk frequency with cdclk not enabled\n")) | 
|---|
| 894 | return; | 
|---|
| 895 |  | 
|---|
| 896 | ret = intel_pcode_write(display->drm, BDW_PCODE_DISPLAY_FREQ_CHANGE_REQ, 0x0); | 
|---|
| 897 | if (ret) { | 
|---|
| 898 | drm_err(display->drm, | 
|---|
| 899 | "failed to inform pcode about cdclk change\n"); | 
|---|
| 900 | return; | 
|---|
| 901 | } | 
|---|
| 902 |  | 
|---|
| 903 | intel_de_rmw(display, LCPLL_CTL, | 
|---|
| 904 | clear: 0, LCPLL_CD_SOURCE_FCLK); | 
|---|
| 905 |  | 
|---|
| 906 | /* | 
|---|
| 907 | * According to the spec, it should be enough to poll for this 1 us. | 
|---|
| 908 | * However, extensive testing shows that this can take longer. | 
|---|
| 909 | */ | 
|---|
| 910 | ret = intel_de_wait_custom(display, LCPLL_CTL, | 
|---|
| 911 | LCPLL_CD_SOURCE_FCLK_DONE, LCPLL_CD_SOURCE_FCLK_DONE, | 
|---|
| 912 | fast_timeout_us: 100, slow_timeout_ms: 0, NULL); | 
|---|
| 913 | if (ret) | 
|---|
| 914 | drm_err(display->drm, "Switching to FCLK failed\n"); | 
|---|
| 915 |  | 
|---|
| 916 | intel_de_rmw(display, LCPLL_CTL, | 
|---|
| 917 | LCPLL_CLK_FREQ_MASK, set: bdw_cdclk_freq_sel(cdclk)); | 
|---|
| 918 |  | 
|---|
| 919 | intel_de_rmw(display, LCPLL_CTL, | 
|---|
| 920 | LCPLL_CD_SOURCE_FCLK, set: 0); | 
|---|
| 921 |  | 
|---|
| 922 | ret = intel_de_wait_custom(display, LCPLL_CTL, | 
|---|
| 923 | LCPLL_CD_SOURCE_FCLK_DONE, value: 0, | 
|---|
| 924 | fast_timeout_us: 1, slow_timeout_ms: 0, NULL); | 
|---|
| 925 | if (ret) | 
|---|
| 926 | drm_err(display->drm, "Switching back to LCPLL failed\n"); | 
|---|
| 927 |  | 
|---|
| 928 | intel_pcode_write(display->drm, HSW_PCODE_DE_WRITE_FREQ_REQ, | 
|---|
| 929 | cdclk_config->voltage_level); | 
|---|
| 930 |  | 
|---|
| 931 | intel_de_write(display, CDCLK_FREQ, | 
|---|
| 932 | DIV_ROUND_CLOSEST(cdclk, 1000) - 1); | 
|---|
| 933 |  | 
|---|
| 934 | intel_update_cdclk(display); | 
|---|
| 935 | } | 
|---|
| 936 |  | 
|---|
| 937 | static int skl_calc_cdclk(int min_cdclk, int vco) | 
|---|
| 938 | { | 
|---|
| 939 | if (vco == 8640000) { | 
|---|
| 940 | if (min_cdclk > 540000) | 
|---|
| 941 | return 617143; | 
|---|
| 942 | else if (min_cdclk > 432000) | 
|---|
| 943 | return 540000; | 
|---|
| 944 | else if (min_cdclk > 308571) | 
|---|
| 945 | return 432000; | 
|---|
| 946 | else | 
|---|
| 947 | return 308571; | 
|---|
| 948 | } else { | 
|---|
| 949 | if (min_cdclk > 540000) | 
|---|
| 950 | return 675000; | 
|---|
| 951 | else if (min_cdclk > 450000) | 
|---|
| 952 | return 540000; | 
|---|
| 953 | else if (min_cdclk > 337500) | 
|---|
| 954 | return 450000; | 
|---|
| 955 | else | 
|---|
| 956 | return 337500; | 
|---|
| 957 | } | 
|---|
| 958 | } | 
|---|
| 959 |  | 
|---|
| 960 | static u8 skl_calc_voltage_level(int cdclk) | 
|---|
| 961 | { | 
|---|
| 962 | if (cdclk > 540000) | 
|---|
| 963 | return 3; | 
|---|
| 964 | else if (cdclk > 450000) | 
|---|
| 965 | return 2; | 
|---|
| 966 | else if (cdclk > 337500) | 
|---|
| 967 | return 1; | 
|---|
| 968 | else | 
|---|
| 969 | return 0; | 
|---|
| 970 | } | 
|---|
| 971 |  | 
|---|
| 972 | static void skl_dpll0_update(struct intel_display *display, | 
|---|
| 973 | struct intel_cdclk_config *cdclk_config) | 
|---|
| 974 | { | 
|---|
| 975 | u32 val; | 
|---|
| 976 |  | 
|---|
| 977 | cdclk_config->ref = 24000; | 
|---|
| 978 | cdclk_config->vco = 0; | 
|---|
| 979 |  | 
|---|
| 980 | val = intel_de_read(display, LCPLL1_CTL); | 
|---|
| 981 | if ((val & LCPLL_PLL_ENABLE) == 0) | 
|---|
| 982 | return; | 
|---|
| 983 |  | 
|---|
| 984 | if (drm_WARN_ON(display->drm, (val & LCPLL_PLL_LOCK) == 0)) | 
|---|
| 985 | return; | 
|---|
| 986 |  | 
|---|
| 987 | val = intel_de_read(display, DPLL_CTRL1); | 
|---|
| 988 |  | 
|---|
| 989 | if (drm_WARN_ON(display->drm, | 
|---|
| 990 | (val & (DPLL_CTRL1_HDMI_MODE(SKL_DPLL0) | | 
|---|
| 991 | DPLL_CTRL1_SSC(SKL_DPLL0) | | 
|---|
| 992 | DPLL_CTRL1_OVERRIDE(SKL_DPLL0))) != | 
|---|
| 993 | DPLL_CTRL1_OVERRIDE(SKL_DPLL0))) | 
|---|
| 994 | return; | 
|---|
| 995 |  | 
|---|
| 996 | switch (val & DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0)) { | 
|---|
| 997 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810, SKL_DPLL0): | 
|---|
| 998 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1350, SKL_DPLL0): | 
|---|
| 999 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1620, SKL_DPLL0): | 
|---|
| 1000 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2700, SKL_DPLL0): | 
|---|
| 1001 | cdclk_config->vco = 8100000; | 
|---|
| 1002 | break; | 
|---|
| 1003 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080, SKL_DPLL0): | 
|---|
| 1004 | case DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2160, SKL_DPLL0): | 
|---|
| 1005 | cdclk_config->vco = 8640000; | 
|---|
| 1006 | break; | 
|---|
| 1007 | default: | 
|---|
| 1008 | MISSING_CASE(val & DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0)); | 
|---|
| 1009 | break; | 
|---|
| 1010 | } | 
|---|
| 1011 | } | 
|---|
| 1012 |  | 
|---|
| 1013 | static void skl_get_cdclk(struct intel_display *display, | 
|---|
| 1014 | struct intel_cdclk_config *cdclk_config) | 
|---|
| 1015 | { | 
|---|
| 1016 | u32 cdctl; | 
|---|
| 1017 |  | 
|---|
| 1018 | skl_dpll0_update(display, cdclk_config); | 
|---|
| 1019 |  | 
|---|
| 1020 | cdclk_config->cdclk = cdclk_config->bypass = cdclk_config->ref; | 
|---|
| 1021 |  | 
|---|
| 1022 | if (cdclk_config->vco == 0) | 
|---|
| 1023 | goto out; | 
|---|
| 1024 |  | 
|---|
| 1025 | cdctl = intel_de_read(display, CDCLK_CTL); | 
|---|
| 1026 |  | 
|---|
| 1027 | if (cdclk_config->vco == 8640000) { | 
|---|
| 1028 | switch (cdctl & CDCLK_FREQ_SEL_MASK) { | 
|---|
| 1029 | case CDCLK_FREQ_450_432: | 
|---|
| 1030 | cdclk_config->cdclk = 432000; | 
|---|
| 1031 | break; | 
|---|
| 1032 | case CDCLK_FREQ_337_308: | 
|---|
| 1033 | cdclk_config->cdclk = 308571; | 
|---|
| 1034 | break; | 
|---|
| 1035 | case CDCLK_FREQ_540: | 
|---|
| 1036 | cdclk_config->cdclk = 540000; | 
|---|
| 1037 | break; | 
|---|
| 1038 | case CDCLK_FREQ_675_617: | 
|---|
| 1039 | cdclk_config->cdclk = 617143; | 
|---|
| 1040 | break; | 
|---|
| 1041 | default: | 
|---|
| 1042 | MISSING_CASE(cdctl & CDCLK_FREQ_SEL_MASK); | 
|---|
| 1043 | break; | 
|---|
| 1044 | } | 
|---|
| 1045 | } else { | 
|---|
| 1046 | switch (cdctl & CDCLK_FREQ_SEL_MASK) { | 
|---|
| 1047 | case CDCLK_FREQ_450_432: | 
|---|
| 1048 | cdclk_config->cdclk = 450000; | 
|---|
| 1049 | break; | 
|---|
| 1050 | case CDCLK_FREQ_337_308: | 
|---|
| 1051 | cdclk_config->cdclk = 337500; | 
|---|
| 1052 | break; | 
|---|
| 1053 | case CDCLK_FREQ_540: | 
|---|
| 1054 | cdclk_config->cdclk = 540000; | 
|---|
| 1055 | break; | 
|---|
| 1056 | case CDCLK_FREQ_675_617: | 
|---|
| 1057 | cdclk_config->cdclk = 675000; | 
|---|
| 1058 | break; | 
|---|
| 1059 | default: | 
|---|
| 1060 | MISSING_CASE(cdctl & CDCLK_FREQ_SEL_MASK); | 
|---|
| 1061 | break; | 
|---|
| 1062 | } | 
|---|
| 1063 | } | 
|---|
| 1064 |  | 
|---|
| 1065 | out: | 
|---|
| 1066 | /* | 
|---|
| 1067 | * Can't read this out :( Let's assume it's | 
|---|
| 1068 | * at least what the CDCLK frequency requires. | 
|---|
| 1069 | */ | 
|---|
| 1070 | cdclk_config->voltage_level = | 
|---|
| 1071 | skl_calc_voltage_level(cdclk: cdclk_config->cdclk); | 
|---|
| 1072 | } | 
|---|
| 1073 |  | 
|---|
| 1074 | /* convert from kHz to .1 fixpoint MHz with -1MHz offset */ | 
|---|
| 1075 | static int skl_cdclk_decimal(int cdclk) | 
|---|
| 1076 | { | 
|---|
| 1077 | return DIV_ROUND_CLOSEST(cdclk - 1000, 500); | 
|---|
| 1078 | } | 
|---|
| 1079 |  | 
|---|
| 1080 | static void skl_set_preferred_cdclk_vco(struct intel_display *display, int vco) | 
|---|
| 1081 | { | 
|---|
| 1082 | bool changed = display->cdclk.skl_preferred_vco_freq != vco; | 
|---|
| 1083 |  | 
|---|
| 1084 | display->cdclk.skl_preferred_vco_freq = vco; | 
|---|
| 1085 |  | 
|---|
| 1086 | if (changed) | 
|---|
| 1087 | intel_update_max_cdclk(display); | 
|---|
| 1088 | } | 
|---|
| 1089 |  | 
|---|
| 1090 | static u32 skl_dpll0_link_rate(struct intel_display *display, int vco) | 
|---|
| 1091 | { | 
|---|
| 1092 | drm_WARN_ON(display->drm, vco != 8100000 && vco != 8640000); | 
|---|
| 1093 |  | 
|---|
| 1094 | /* | 
|---|
| 1095 | * We always enable DPLL0 with the lowest link rate possible, but still | 
|---|
| 1096 | * taking into account the VCO required to operate the eDP panel at the | 
|---|
| 1097 | * desired frequency. The usual DP link rates operate with a VCO of | 
|---|
| 1098 | * 8100 while the eDP 1.4 alternate link rates need a VCO of 8640. | 
|---|
| 1099 | * The modeset code is responsible for the selection of the exact link | 
|---|
| 1100 | * rate later on, with the constraint of choosing a frequency that | 
|---|
| 1101 | * works with vco. | 
|---|
| 1102 | */ | 
|---|
| 1103 | if (vco == 8640000) | 
|---|
| 1104 | return DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080, SKL_DPLL0); | 
|---|
| 1105 | else | 
|---|
| 1106 | return DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810, SKL_DPLL0); | 
|---|
| 1107 | } | 
|---|
| 1108 |  | 
|---|
| 1109 | static void skl_dpll0_enable(struct intel_display *display, int vco) | 
|---|
| 1110 | { | 
|---|
| 1111 | intel_de_rmw(display, DPLL_CTRL1, | 
|---|
| 1112 | DPLL_CTRL1_HDMI_MODE(SKL_DPLL0) | | 
|---|
| 1113 | DPLL_CTRL1_SSC(SKL_DPLL0) | | 
|---|
| 1114 | DPLL_CTRL1_LINK_RATE_MASK(SKL_DPLL0), | 
|---|
| 1115 | DPLL_CTRL1_OVERRIDE(SKL_DPLL0) | | 
|---|
| 1116 | skl_dpll0_link_rate(display, vco)); | 
|---|
| 1117 | intel_de_posting_read(display, DPLL_CTRL1); | 
|---|
| 1118 |  | 
|---|
| 1119 | intel_de_rmw(display, LCPLL1_CTL, | 
|---|
| 1120 | clear: 0, LCPLL_PLL_ENABLE); | 
|---|
| 1121 |  | 
|---|
| 1122 | if (intel_de_wait_for_set(display, LCPLL1_CTL, LCPLL_PLL_LOCK, timeout_ms: 5)) | 
|---|
| 1123 | drm_err(display->drm, "DPLL0 not locked\n"); | 
|---|
| 1124 |  | 
|---|
| 1125 | display->cdclk.hw.vco = vco; | 
|---|
| 1126 |  | 
|---|
| 1127 | /* We'll want to keep using the current vco from now on. */ | 
|---|
| 1128 | skl_set_preferred_cdclk_vco(display, vco); | 
|---|
| 1129 | } | 
|---|
| 1130 |  | 
|---|
| 1131 | static void skl_dpll0_disable(struct intel_display *display) | 
|---|
| 1132 | { | 
|---|
| 1133 | intel_de_rmw(display, LCPLL1_CTL, | 
|---|
| 1134 | LCPLL_PLL_ENABLE, set: 0); | 
|---|
| 1135 |  | 
|---|
| 1136 | if (intel_de_wait_for_clear(display, LCPLL1_CTL, LCPLL_PLL_LOCK, timeout_ms: 1)) | 
|---|
| 1137 | drm_err(display->drm, "Couldn't disable DPLL0\n"); | 
|---|
| 1138 |  | 
|---|
| 1139 | display->cdclk.hw.vco = 0; | 
|---|
| 1140 | } | 
|---|
| 1141 |  | 
|---|
| 1142 | static u32 skl_cdclk_freq_sel(struct intel_display *display, | 
|---|
| 1143 | int cdclk, int vco) | 
|---|
| 1144 | { | 
|---|
| 1145 | switch (cdclk) { | 
|---|
| 1146 | default: | 
|---|
| 1147 | drm_WARN_ON(display->drm, | 
|---|
| 1148 | cdclk != display->cdclk.hw.bypass); | 
|---|
| 1149 | drm_WARN_ON(display->drm, vco != 0); | 
|---|
| 1150 | fallthrough; | 
|---|
| 1151 | case 308571: | 
|---|
| 1152 | case 337500: | 
|---|
| 1153 | return CDCLK_FREQ_337_308; | 
|---|
| 1154 | case 450000: | 
|---|
| 1155 | case 432000: | 
|---|
| 1156 | return CDCLK_FREQ_450_432; | 
|---|
| 1157 | case 540000: | 
|---|
| 1158 | return CDCLK_FREQ_540; | 
|---|
| 1159 | case 617143: | 
|---|
| 1160 | case 675000: | 
|---|
| 1161 | return CDCLK_FREQ_675_617; | 
|---|
| 1162 | } | 
|---|
| 1163 | } | 
|---|
| 1164 |  | 
|---|
| 1165 | static void skl_set_cdclk(struct intel_display *display, | 
|---|
| 1166 | const struct intel_cdclk_config *cdclk_config, | 
|---|
| 1167 | enum pipe pipe) | 
|---|
| 1168 | { | 
|---|
| 1169 | int cdclk = cdclk_config->cdclk; | 
|---|
| 1170 | int vco = cdclk_config->vco; | 
|---|
| 1171 | u32 freq_select, cdclk_ctl; | 
|---|
| 1172 | int ret; | 
|---|
| 1173 |  | 
|---|
| 1174 | /* | 
|---|
| 1175 | * Based on WA#1183 CDCLK rates 308 and 617MHz CDCLK rates are | 
|---|
| 1176 | * unsupported on SKL. In theory this should never happen since only | 
|---|
| 1177 | * the eDP1.4 2.16 and 4.32Gbps rates require it, but eDP1.4 is not | 
|---|
| 1178 | * supported on SKL either, see the above WA. WARN whenever trying to | 
|---|
| 1179 | * use the corresponding VCO freq as that always leads to using the | 
|---|
| 1180 | * minimum 308MHz CDCLK. | 
|---|
| 1181 | */ | 
|---|
| 1182 | drm_WARN_ON_ONCE(display->drm, | 
|---|
| 1183 | display->platform.skylake && vco == 8640000); | 
|---|
| 1184 |  | 
|---|
| 1185 | ret = intel_pcode_request(drm: display->drm, SKL_PCODE_CDCLK_CONTROL, | 
|---|
| 1186 | SKL_CDCLK_PREPARE_FOR_CHANGE, | 
|---|
| 1187 | SKL_CDCLK_READY_FOR_CHANGE, | 
|---|
| 1188 | SKL_CDCLK_READY_FOR_CHANGE, timeout_base_ms: 3); | 
|---|
| 1189 | if (ret) { | 
|---|
| 1190 | drm_err(display->drm, | 
|---|
| 1191 | "Failed to inform PCU about cdclk change (%d)\n", ret); | 
|---|
| 1192 | return; | 
|---|
| 1193 | } | 
|---|
| 1194 |  | 
|---|
| 1195 | freq_select = skl_cdclk_freq_sel(display, cdclk, vco); | 
|---|
| 1196 |  | 
|---|
| 1197 | if (display->cdclk.hw.vco != 0 && | 
|---|
| 1198 | display->cdclk.hw.vco != vco) | 
|---|
| 1199 | skl_dpll0_disable(display); | 
|---|
| 1200 |  | 
|---|
| 1201 | cdclk_ctl = intel_de_read(display, CDCLK_CTL); | 
|---|
| 1202 |  | 
|---|
| 1203 | if (display->cdclk.hw.vco != vco) { | 
|---|
| 1204 | /* Wa Display #1183: skl,kbl,cfl */ | 
|---|
| 1205 | cdclk_ctl &= ~(CDCLK_FREQ_SEL_MASK | CDCLK_FREQ_DECIMAL_MASK); | 
|---|
| 1206 | cdclk_ctl |= freq_select | skl_cdclk_decimal(cdclk); | 
|---|
| 1207 | intel_de_write(display, CDCLK_CTL, val: cdclk_ctl); | 
|---|
| 1208 | } | 
|---|
| 1209 |  | 
|---|
| 1210 | /* Wa Display #1183: skl,kbl,cfl */ | 
|---|
| 1211 | cdclk_ctl |= CDCLK_DIVMUX_CD_OVERRIDE; | 
|---|
| 1212 | intel_de_write(display, CDCLK_CTL, val: cdclk_ctl); | 
|---|
| 1213 | intel_de_posting_read(display, CDCLK_CTL); | 
|---|
| 1214 |  | 
|---|
| 1215 | if (display->cdclk.hw.vco != vco) | 
|---|
| 1216 | skl_dpll0_enable(display, vco); | 
|---|
| 1217 |  | 
|---|
| 1218 | /* Wa Display #1183: skl,kbl,cfl */ | 
|---|
| 1219 | cdclk_ctl &= ~(CDCLK_FREQ_SEL_MASK | CDCLK_FREQ_DECIMAL_MASK); | 
|---|
| 1220 | intel_de_write(display, CDCLK_CTL, val: cdclk_ctl); | 
|---|
| 1221 |  | 
|---|
| 1222 | cdclk_ctl |= freq_select | skl_cdclk_decimal(cdclk); | 
|---|
| 1223 | intel_de_write(display, CDCLK_CTL, val: cdclk_ctl); | 
|---|
| 1224 |  | 
|---|
| 1225 | /* Wa Display #1183: skl,kbl,cfl */ | 
|---|
| 1226 | cdclk_ctl &= ~CDCLK_DIVMUX_CD_OVERRIDE; | 
|---|
| 1227 | intel_de_write(display, CDCLK_CTL, val: cdclk_ctl); | 
|---|
| 1228 | intel_de_posting_read(display, CDCLK_CTL); | 
|---|
| 1229 |  | 
|---|
| 1230 | /* inform PCU of the change */ | 
|---|
| 1231 | intel_pcode_write(display->drm, SKL_PCODE_CDCLK_CONTROL, | 
|---|
| 1232 | cdclk_config->voltage_level); | 
|---|
| 1233 |  | 
|---|
| 1234 | intel_update_cdclk(display); | 
|---|
| 1235 | } | 
|---|
| 1236 |  | 
|---|
| 1237 | static void skl_sanitize_cdclk(struct intel_display *display) | 
|---|
| 1238 | { | 
|---|
| 1239 | u32 cdctl, expected; | 
|---|
| 1240 |  | 
|---|
| 1241 | /* | 
|---|
| 1242 | * check if the pre-os initialized the display | 
|---|
| 1243 | * There is SWF18 scratchpad register defined which is set by the | 
|---|
| 1244 | * pre-os which can be used by the OS drivers to check the status | 
|---|
| 1245 | */ | 
|---|
| 1246 | if ((intel_de_read(display, SWF_ILK(0x18)) & 0x00FFFFFF) == 0) | 
|---|
| 1247 | goto sanitize; | 
|---|
| 1248 |  | 
|---|
| 1249 | intel_update_cdclk(display); | 
|---|
| 1250 | intel_cdclk_dump_config(display, cdclk_config: &display->cdclk.hw, context: "Current CDCLK"); | 
|---|
| 1251 |  | 
|---|
| 1252 | /* Is PLL enabled and locked ? */ | 
|---|
| 1253 | if (display->cdclk.hw.vco == 0 || | 
|---|
| 1254 | display->cdclk.hw.cdclk == display->cdclk.hw.bypass) | 
|---|
| 1255 | goto sanitize; | 
|---|
| 1256 |  | 
|---|
| 1257 | /* DPLL okay; verify the cdclock | 
|---|
| 1258 | * | 
|---|
| 1259 | * Noticed in some instances that the freq selection is correct but | 
|---|
| 1260 | * decimal part is programmed wrong from BIOS where pre-os does not | 
|---|
| 1261 | * enable display. Verify the same as well. | 
|---|
| 1262 | */ | 
|---|
| 1263 | cdctl = intel_de_read(display, CDCLK_CTL); | 
|---|
| 1264 | expected = (cdctl & CDCLK_FREQ_SEL_MASK) | | 
|---|
| 1265 | skl_cdclk_decimal(cdclk: display->cdclk.hw.cdclk); | 
|---|
| 1266 | if (cdctl == expected) | 
|---|
| 1267 | /* All well; nothing to sanitize */ | 
|---|
| 1268 | return; | 
|---|
| 1269 |  | 
|---|
| 1270 | sanitize: | 
|---|
| 1271 | drm_dbg_kms(display->drm, "Sanitizing cdclk programmed by pre-os\n"); | 
|---|
| 1272 |  | 
|---|
| 1273 | /* force cdclk programming */ | 
|---|
| 1274 | display->cdclk.hw.cdclk = 0; | 
|---|
| 1275 | /* force full PLL disable + enable */ | 
|---|
| 1276 | display->cdclk.hw.vco = ~0; | 
|---|
| 1277 | } | 
|---|
| 1278 |  | 
|---|
| 1279 | static void skl_cdclk_init_hw(struct intel_display *display) | 
|---|
| 1280 | { | 
|---|
| 1281 | struct intel_cdclk_config cdclk_config; | 
|---|
| 1282 |  | 
|---|
| 1283 | skl_sanitize_cdclk(display); | 
|---|
| 1284 |  | 
|---|
| 1285 | if (display->cdclk.hw.cdclk != 0 && | 
|---|
| 1286 | display->cdclk.hw.vco != 0) { | 
|---|
| 1287 | /* | 
|---|
| 1288 | * Use the current vco as our initial | 
|---|
| 1289 | * guess as to what the preferred vco is. | 
|---|
| 1290 | */ | 
|---|
| 1291 | if (display->cdclk.skl_preferred_vco_freq == 0) | 
|---|
| 1292 | skl_set_preferred_cdclk_vco(display, | 
|---|
| 1293 | vco: display->cdclk.hw.vco); | 
|---|
| 1294 | return; | 
|---|
| 1295 | } | 
|---|
| 1296 |  | 
|---|
| 1297 | cdclk_config = display->cdclk.hw; | 
|---|
| 1298 |  | 
|---|
| 1299 | cdclk_config.vco = display->cdclk.skl_preferred_vco_freq; | 
|---|
| 1300 | if (cdclk_config.vco == 0) | 
|---|
| 1301 | cdclk_config.vco = 8100000; | 
|---|
| 1302 | cdclk_config.cdclk = skl_calc_cdclk(min_cdclk: 0, vco: cdclk_config.vco); | 
|---|
| 1303 | cdclk_config.voltage_level = skl_calc_voltage_level(cdclk: cdclk_config.cdclk); | 
|---|
| 1304 |  | 
|---|
| 1305 | skl_set_cdclk(display, cdclk_config: &cdclk_config, pipe: INVALID_PIPE); | 
|---|
| 1306 | } | 
|---|
| 1307 |  | 
|---|
| 1308 | static void skl_cdclk_uninit_hw(struct intel_display *display) | 
|---|
| 1309 | { | 
|---|
| 1310 | struct intel_cdclk_config cdclk_config = display->cdclk.hw; | 
|---|
| 1311 |  | 
|---|
| 1312 | cdclk_config.cdclk = cdclk_config.bypass; | 
|---|
| 1313 | cdclk_config.vco = 0; | 
|---|
| 1314 | cdclk_config.voltage_level = skl_calc_voltage_level(cdclk: cdclk_config.cdclk); | 
|---|
| 1315 |  | 
|---|
| 1316 | skl_set_cdclk(display, cdclk_config: &cdclk_config, pipe: INVALID_PIPE); | 
|---|
| 1317 | } | 
|---|
| 1318 |  | 
|---|
| 1319 | struct intel_cdclk_vals { | 
|---|
| 1320 | u32 cdclk; | 
|---|
| 1321 | u16 refclk; | 
|---|
| 1322 | u16 waveform; | 
|---|
| 1323 | u8 ratio; | 
|---|
| 1324 | }; | 
|---|
| 1325 |  | 
|---|
| 1326 | static const struct intel_cdclk_vals bxt_cdclk_table[] = { | 
|---|
| 1327 | { .refclk = 19200, .cdclk = 144000, .ratio = 60 }, | 
|---|
| 1328 | { .refclk = 19200, .cdclk = 288000, .ratio = 60 }, | 
|---|
| 1329 | { .refclk = 19200, .cdclk = 384000, .ratio = 60 }, | 
|---|
| 1330 | { .refclk = 19200, .cdclk = 576000, .ratio = 60 }, | 
|---|
| 1331 | { .refclk = 19200, .cdclk = 624000, .ratio = 65 }, | 
|---|
| 1332 | {} | 
|---|
| 1333 | }; | 
|---|
| 1334 |  | 
|---|
| 1335 | static const struct intel_cdclk_vals glk_cdclk_table[] = { | 
|---|
| 1336 | { .refclk = 19200, .cdclk =  79200, .ratio = 33 }, | 
|---|
| 1337 | { .refclk = 19200, .cdclk = 158400, .ratio = 33 }, | 
|---|
| 1338 | { .refclk = 19200, .cdclk = 316800, .ratio = 33 }, | 
|---|
| 1339 | {} | 
|---|
| 1340 | }; | 
|---|
| 1341 |  | 
|---|
| 1342 | static const struct intel_cdclk_vals icl_cdclk_table[] = { | 
|---|
| 1343 | { .refclk = 19200, .cdclk = 172800, .ratio = 18 }, | 
|---|
| 1344 | { .refclk = 19200, .cdclk = 192000, .ratio = 20 }, | 
|---|
| 1345 | { .refclk = 19200, .cdclk = 307200, .ratio = 32 }, | 
|---|
| 1346 | { .refclk = 19200, .cdclk = 326400, .ratio = 68 }, | 
|---|
| 1347 | { .refclk = 19200, .cdclk = 556800, .ratio = 58 }, | 
|---|
| 1348 | { .refclk = 19200, .cdclk = 652800, .ratio = 68 }, | 
|---|
| 1349 |  | 
|---|
| 1350 | { .refclk = 24000, .cdclk = 180000, .ratio = 15 }, | 
|---|
| 1351 | { .refclk = 24000, .cdclk = 192000, .ratio = 16 }, | 
|---|
| 1352 | { .refclk = 24000, .cdclk = 312000, .ratio = 26 }, | 
|---|
| 1353 | { .refclk = 24000, .cdclk = 324000, .ratio = 54 }, | 
|---|
| 1354 | { .refclk = 24000, .cdclk = 552000, .ratio = 46 }, | 
|---|
| 1355 | { .refclk = 24000, .cdclk = 648000, .ratio = 54 }, | 
|---|
| 1356 |  | 
|---|
| 1357 | { .refclk = 38400, .cdclk = 172800, .ratio =  9 }, | 
|---|
| 1358 | { .refclk = 38400, .cdclk = 192000, .ratio = 10 }, | 
|---|
| 1359 | { .refclk = 38400, .cdclk = 307200, .ratio = 16 }, | 
|---|
| 1360 | { .refclk = 38400, .cdclk = 326400, .ratio = 34 }, | 
|---|
| 1361 | { .refclk = 38400, .cdclk = 556800, .ratio = 29 }, | 
|---|
| 1362 | { .refclk = 38400, .cdclk = 652800, .ratio = 34 }, | 
|---|
| 1363 | {} | 
|---|
| 1364 | }; | 
|---|
| 1365 |  | 
|---|
| 1366 | static const struct intel_cdclk_vals rkl_cdclk_table[] = { | 
|---|
| 1367 | { .refclk = 19200, .cdclk = 172800, .ratio =  36 }, | 
|---|
| 1368 | { .refclk = 19200, .cdclk = 192000, .ratio =  40 }, | 
|---|
| 1369 | { .refclk = 19200, .cdclk = 307200, .ratio =  64 }, | 
|---|
| 1370 | { .refclk = 19200, .cdclk = 326400, .ratio = 136 }, | 
|---|
| 1371 | { .refclk = 19200, .cdclk = 556800, .ratio = 116 }, | 
|---|
| 1372 | { .refclk = 19200, .cdclk = 652800, .ratio = 136 }, | 
|---|
| 1373 |  | 
|---|
| 1374 | { .refclk = 24000, .cdclk = 180000, .ratio =  30 }, | 
|---|
| 1375 | { .refclk = 24000, .cdclk = 192000, .ratio =  32 }, | 
|---|
| 1376 | { .refclk = 24000, .cdclk = 312000, .ratio =  52 }, | 
|---|
| 1377 | { .refclk = 24000, .cdclk = 324000, .ratio = 108 }, | 
|---|
| 1378 | { .refclk = 24000, .cdclk = 552000, .ratio =  92 }, | 
|---|
| 1379 | { .refclk = 24000, .cdclk = 648000, .ratio = 108 }, | 
|---|
| 1380 |  | 
|---|
| 1381 | { .refclk = 38400, .cdclk = 172800, .ratio = 18 }, | 
|---|
| 1382 | { .refclk = 38400, .cdclk = 192000, .ratio = 20 }, | 
|---|
| 1383 | { .refclk = 38400, .cdclk = 307200, .ratio = 32 }, | 
|---|
| 1384 | { .refclk = 38400, .cdclk = 326400, .ratio = 68 }, | 
|---|
| 1385 | { .refclk = 38400, .cdclk = 556800, .ratio = 58 }, | 
|---|
| 1386 | { .refclk = 38400, .cdclk = 652800, .ratio = 68 }, | 
|---|
| 1387 | {} | 
|---|
| 1388 | }; | 
|---|
| 1389 |  | 
|---|
| 1390 | static const struct intel_cdclk_vals adlp_a_step_cdclk_table[] = { | 
|---|
| 1391 | { .refclk = 19200, .cdclk = 307200, .ratio = 32 }, | 
|---|
| 1392 | { .refclk = 19200, .cdclk = 556800, .ratio = 58 }, | 
|---|
| 1393 | { .refclk = 19200, .cdclk = 652800, .ratio = 68 }, | 
|---|
| 1394 |  | 
|---|
| 1395 | { .refclk = 24000, .cdclk = 312000, .ratio = 26 }, | 
|---|
| 1396 | { .refclk = 24000, .cdclk = 552000, .ratio = 46 }, | 
|---|
| 1397 | { .refclk = 24400, .cdclk = 648000, .ratio = 54 }, | 
|---|
| 1398 |  | 
|---|
| 1399 | { .refclk = 38400, .cdclk = 307200, .ratio = 16 }, | 
|---|
| 1400 | { .refclk = 38400, .cdclk = 556800, .ratio = 29 }, | 
|---|
| 1401 | { .refclk = 38400, .cdclk = 652800, .ratio = 34 }, | 
|---|
| 1402 | {} | 
|---|
| 1403 | }; | 
|---|
| 1404 |  | 
|---|
| 1405 | static const struct intel_cdclk_vals adlp_cdclk_table[] = { | 
|---|
| 1406 | { .refclk = 19200, .cdclk = 172800, .ratio = 27 }, | 
|---|
| 1407 | { .refclk = 19200, .cdclk = 192000, .ratio = 20 }, | 
|---|
| 1408 | { .refclk = 19200, .cdclk = 307200, .ratio = 32 }, | 
|---|
| 1409 | { .refclk = 19200, .cdclk = 556800, .ratio = 58 }, | 
|---|
| 1410 | { .refclk = 19200, .cdclk = 652800, .ratio = 68 }, | 
|---|
| 1411 |  | 
|---|
| 1412 | { .refclk = 24000, .cdclk = 176000, .ratio = 22 }, | 
|---|
| 1413 | { .refclk = 24000, .cdclk = 192000, .ratio = 16 }, | 
|---|
| 1414 | { .refclk = 24000, .cdclk = 312000, .ratio = 26 }, | 
|---|
| 1415 | { .refclk = 24000, .cdclk = 552000, .ratio = 46 }, | 
|---|
| 1416 | { .refclk = 24000, .cdclk = 648000, .ratio = 54 }, | 
|---|
| 1417 |  | 
|---|
| 1418 | { .refclk = 38400, .cdclk = 179200, .ratio = 14 }, | 
|---|
| 1419 | { .refclk = 38400, .cdclk = 192000, .ratio = 10 }, | 
|---|
| 1420 | { .refclk = 38400, .cdclk = 307200, .ratio = 16 }, | 
|---|
| 1421 | { .refclk = 38400, .cdclk = 556800, .ratio = 29 }, | 
|---|
| 1422 | { .refclk = 38400, .cdclk = 652800, .ratio = 34 }, | 
|---|
| 1423 | {} | 
|---|
| 1424 | }; | 
|---|
| 1425 |  | 
|---|
| 1426 | static const struct intel_cdclk_vals rplu_cdclk_table[] = { | 
|---|
| 1427 | { .refclk = 19200, .cdclk = 172800, .ratio = 27 }, | 
|---|
| 1428 | { .refclk = 19200, .cdclk = 192000, .ratio = 20 }, | 
|---|
| 1429 | { .refclk = 19200, .cdclk = 307200, .ratio = 32 }, | 
|---|
| 1430 | { .refclk = 19200, .cdclk = 480000, .ratio = 50 }, | 
|---|
| 1431 | { .refclk = 19200, .cdclk = 556800, .ratio = 58 }, | 
|---|
| 1432 | { .refclk = 19200, .cdclk = 652800, .ratio = 68 }, | 
|---|
| 1433 |  | 
|---|
| 1434 | { .refclk = 24000, .cdclk = 176000, .ratio = 22 }, | 
|---|
| 1435 | { .refclk = 24000, .cdclk = 192000, .ratio = 16 }, | 
|---|
| 1436 | { .refclk = 24000, .cdclk = 312000, .ratio = 26 }, | 
|---|
| 1437 | { .refclk = 24000, .cdclk = 480000, .ratio = 40 }, | 
|---|
| 1438 | { .refclk = 24000, .cdclk = 552000, .ratio = 46 }, | 
|---|
| 1439 | { .refclk = 24000, .cdclk = 648000, .ratio = 54 }, | 
|---|
| 1440 |  | 
|---|
| 1441 | { .refclk = 38400, .cdclk = 179200, .ratio = 14 }, | 
|---|
| 1442 | { .refclk = 38400, .cdclk = 192000, .ratio = 10 }, | 
|---|
| 1443 | { .refclk = 38400, .cdclk = 307200, .ratio = 16 }, | 
|---|
| 1444 | { .refclk = 38400, .cdclk = 480000, .ratio = 25 }, | 
|---|
| 1445 | { .refclk = 38400, .cdclk = 556800, .ratio = 29 }, | 
|---|
| 1446 | { .refclk = 38400, .cdclk = 652800, .ratio = 34 }, | 
|---|
| 1447 | {} | 
|---|
| 1448 | }; | 
|---|
| 1449 |  | 
|---|
| 1450 | static const struct intel_cdclk_vals dg2_cdclk_table[] = { | 
|---|
| 1451 | { .refclk = 38400, .cdclk = 163200, .ratio = 34, .waveform = 0x8888 }, | 
|---|
| 1452 | { .refclk = 38400, .cdclk = 204000, .ratio = 34, .waveform = 0x9248 }, | 
|---|
| 1453 | { .refclk = 38400, .cdclk = 244800, .ratio = 34, .waveform = 0xa4a4 }, | 
|---|
| 1454 | { .refclk = 38400, .cdclk = 285600, .ratio = 34, .waveform = 0xa54a }, | 
|---|
| 1455 | { .refclk = 38400, .cdclk = 326400, .ratio = 34, .waveform = 0xaaaa }, | 
|---|
| 1456 | { .refclk = 38400, .cdclk = 367200, .ratio = 34, .waveform = 0xad5a }, | 
|---|
| 1457 | { .refclk = 38400, .cdclk = 408000, .ratio = 34, .waveform = 0xb6b6 }, | 
|---|
| 1458 | { .refclk = 38400, .cdclk = 448800, .ratio = 34, .waveform = 0xdbb6 }, | 
|---|
| 1459 | { .refclk = 38400, .cdclk = 489600, .ratio = 34, .waveform = 0xeeee }, | 
|---|
| 1460 | { .refclk = 38400, .cdclk = 530400, .ratio = 34, .waveform = 0xf7de }, | 
|---|
| 1461 | { .refclk = 38400, .cdclk = 571200, .ratio = 34, .waveform = 0xfefe }, | 
|---|
| 1462 | { .refclk = 38400, .cdclk = 612000, .ratio = 34, .waveform = 0xfffe }, | 
|---|
| 1463 | { .refclk = 38400, .cdclk = 652800, .ratio = 34, .waveform = 0xffff }, | 
|---|
| 1464 | {} | 
|---|
| 1465 | }; | 
|---|
| 1466 |  | 
|---|
| 1467 | static const struct intel_cdclk_vals mtl_cdclk_table[] = { | 
|---|
| 1468 | { .refclk = 38400, .cdclk = 172800, .ratio = 16, .waveform = 0xad5a }, | 
|---|
| 1469 | { .refclk = 38400, .cdclk = 192000, .ratio = 16, .waveform = 0xb6b6 }, | 
|---|
| 1470 | { .refclk = 38400, .cdclk = 307200, .ratio = 16, .waveform = 0x0000 }, | 
|---|
| 1471 | { .refclk = 38400, .cdclk = 480000, .ratio = 25, .waveform = 0x0000 }, | 
|---|
| 1472 | { .refclk = 38400, .cdclk = 556800, .ratio = 29, .waveform = 0x0000 }, | 
|---|
| 1473 | { .refclk = 38400, .cdclk = 652800, .ratio = 34, .waveform = 0x0000 }, | 
|---|
| 1474 | {} | 
|---|
| 1475 | }; | 
|---|
| 1476 |  | 
|---|
| 1477 | static const struct intel_cdclk_vals xe2lpd_cdclk_table[] = { | 
|---|
| 1478 | { .refclk = 38400, .cdclk = 153600, .ratio = 16, .waveform = 0xaaaa }, | 
|---|
| 1479 | { .refclk = 38400, .cdclk = 172800, .ratio = 16, .waveform = 0xad5a }, | 
|---|
| 1480 | { .refclk = 38400, .cdclk = 192000, .ratio = 16, .waveform = 0xb6b6 }, | 
|---|
| 1481 | { .refclk = 38400, .cdclk = 211200, .ratio = 16, .waveform = 0xdbb6 }, | 
|---|
| 1482 | { .refclk = 38400, .cdclk = 230400, .ratio = 16, .waveform = 0xeeee }, | 
|---|
| 1483 | { .refclk = 38400, .cdclk = 249600, .ratio = 16, .waveform = 0xf7de }, | 
|---|
| 1484 | { .refclk = 38400, .cdclk = 268800, .ratio = 16, .waveform = 0xfefe }, | 
|---|
| 1485 | { .refclk = 38400, .cdclk = 288000, .ratio = 16, .waveform = 0xfffe }, | 
|---|
| 1486 | { .refclk = 38400, .cdclk = 307200, .ratio = 16, .waveform = 0xffff }, | 
|---|
| 1487 | { .refclk = 38400, .cdclk = 330000, .ratio = 25, .waveform = 0xdbb6 }, | 
|---|
| 1488 | { .refclk = 38400, .cdclk = 360000, .ratio = 25, .waveform = 0xeeee }, | 
|---|
| 1489 | { .refclk = 38400, .cdclk = 390000, .ratio = 25, .waveform = 0xf7de }, | 
|---|
| 1490 | { .refclk = 38400, .cdclk = 420000, .ratio = 25, .waveform = 0xfefe }, | 
|---|
| 1491 | { .refclk = 38400, .cdclk = 450000, .ratio = 25, .waveform = 0xfffe }, | 
|---|
| 1492 | { .refclk = 38400, .cdclk = 480000, .ratio = 25, .waveform = 0xffff }, | 
|---|
| 1493 | { .refclk = 38400, .cdclk = 487200, .ratio = 29, .waveform = 0xfefe }, | 
|---|
| 1494 | { .refclk = 38400, .cdclk = 522000, .ratio = 29, .waveform = 0xfffe }, | 
|---|
| 1495 | { .refclk = 38400, .cdclk = 556800, .ratio = 29, .waveform = 0xffff }, | 
|---|
| 1496 | { .refclk = 38400, .cdclk = 571200, .ratio = 34, .waveform = 0xfefe }, | 
|---|
| 1497 | { .refclk = 38400, .cdclk = 612000, .ratio = 34, .waveform = 0xfffe }, | 
|---|
| 1498 | { .refclk = 38400, .cdclk = 652800, .ratio = 34, .waveform = 0xffff }, | 
|---|
| 1499 | {} | 
|---|
| 1500 | }; | 
|---|
| 1501 |  | 
|---|
| 1502 | /* | 
|---|
| 1503 | * Xe2_HPD always uses the minimal cdclk table from Wa_15015413771 | 
|---|
| 1504 | */ | 
|---|
| 1505 | static const struct intel_cdclk_vals xe2hpd_cdclk_table[] = { | 
|---|
| 1506 | { .refclk = 38400, .cdclk = 652800, .ratio = 34, .waveform = 0xffff }, | 
|---|
| 1507 | {} | 
|---|
| 1508 | }; | 
|---|
| 1509 |  | 
|---|
| 1510 | static const struct intel_cdclk_vals xe3lpd_cdclk_table[] = { | 
|---|
| 1511 | { .refclk = 38400, .cdclk = 153600, .ratio = 16, .waveform = 0xaaaa }, | 
|---|
| 1512 | { .refclk = 38400, .cdclk = 172800, .ratio = 16, .waveform = 0xad5a }, | 
|---|
| 1513 | { .refclk = 38400, .cdclk = 192000, .ratio = 16, .waveform = 0xb6b6 }, | 
|---|
| 1514 | { .refclk = 38400, .cdclk = 211200, .ratio = 16, .waveform = 0xdbb6 }, | 
|---|
| 1515 | { .refclk = 38400, .cdclk = 230400, .ratio = 16, .waveform = 0xeeee }, | 
|---|
| 1516 | { .refclk = 38400, .cdclk = 249600, .ratio = 16, .waveform = 0xf7de }, | 
|---|
| 1517 | { .refclk = 38400, .cdclk = 268800, .ratio = 16, .waveform = 0xfefe }, | 
|---|
| 1518 | { .refclk = 38400, .cdclk = 288000, .ratio = 16, .waveform = 0xfffe }, | 
|---|
| 1519 | { .refclk = 38400, .cdclk = 307200, .ratio = 16, .waveform = 0xffff }, | 
|---|
| 1520 | { .refclk = 38400, .cdclk = 326400, .ratio = 17, .waveform = 0xffff }, | 
|---|
| 1521 | { .refclk = 38400, .cdclk = 345600, .ratio = 18, .waveform = 0xffff }, | 
|---|
| 1522 | { .refclk = 38400, .cdclk = 364800, .ratio = 19, .waveform = 0xffff }, | 
|---|
| 1523 | { .refclk = 38400, .cdclk = 384000, .ratio = 20, .waveform = 0xffff }, | 
|---|
| 1524 | { .refclk = 38400, .cdclk = 403200, .ratio = 21, .waveform = 0xffff }, | 
|---|
| 1525 | { .refclk = 38400, .cdclk = 422400, .ratio = 22, .waveform = 0xffff }, | 
|---|
| 1526 | { .refclk = 38400, .cdclk = 441600, .ratio = 23, .waveform = 0xffff }, | 
|---|
| 1527 | { .refclk = 38400, .cdclk = 460800, .ratio = 24, .waveform = 0xffff }, | 
|---|
| 1528 | { .refclk = 38400, .cdclk = 480000, .ratio = 25, .waveform = 0xffff }, | 
|---|
| 1529 | { .refclk = 38400, .cdclk = 499200, .ratio = 26, .waveform = 0xffff }, | 
|---|
| 1530 | { .refclk = 38400, .cdclk = 518400, .ratio = 27, .waveform = 0xffff }, | 
|---|
| 1531 | { .refclk = 38400, .cdclk = 537600, .ratio = 28, .waveform = 0xffff }, | 
|---|
| 1532 | { .refclk = 38400, .cdclk = 556800, .ratio = 29, .waveform = 0xffff }, | 
|---|
| 1533 | { .refclk = 38400, .cdclk = 576000, .ratio = 30, .waveform = 0xffff }, | 
|---|
| 1534 | { .refclk = 38400, .cdclk = 595200, .ratio = 31, .waveform = 0xffff }, | 
|---|
| 1535 | { .refclk = 38400, .cdclk = 614400, .ratio = 32, .waveform = 0xffff }, | 
|---|
| 1536 | { .refclk = 38400, .cdclk = 633600, .ratio = 33, .waveform = 0xffff }, | 
|---|
| 1537 | { .refclk = 38400, .cdclk = 652800, .ratio = 34, .waveform = 0xffff }, | 
|---|
| 1538 | { .refclk = 38400, .cdclk = 672000, .ratio = 35, .waveform = 0xffff }, | 
|---|
| 1539 | { .refclk = 38400, .cdclk = 691200, .ratio = 36, .waveform = 0xffff }, | 
|---|
| 1540 | {} | 
|---|
| 1541 | }; | 
|---|
| 1542 |  | 
|---|
| 1543 | static const int cdclk_squash_len = 16; | 
|---|
| 1544 |  | 
|---|
| 1545 | static int cdclk_squash_divider(u16 waveform) | 
|---|
| 1546 | { | 
|---|
| 1547 | return hweight16(waveform ?: 0xffff); | 
|---|
| 1548 | } | 
|---|
| 1549 |  | 
|---|
| 1550 | static int cdclk_divider(int cdclk, int vco, u16 waveform) | 
|---|
| 1551 | { | 
|---|
| 1552 | /* 2 * cd2x divider */ | 
|---|
| 1553 | return DIV_ROUND_CLOSEST(vco * cdclk_squash_divider(waveform), | 
|---|
| 1554 | cdclk * cdclk_squash_len); | 
|---|
| 1555 | } | 
|---|
| 1556 |  | 
|---|
| 1557 | static int bxt_calc_cdclk(struct intel_display *display, int min_cdclk) | 
|---|
| 1558 | { | 
|---|
| 1559 | const struct intel_cdclk_vals *table = display->cdclk.table; | 
|---|
| 1560 | int i; | 
|---|
| 1561 |  | 
|---|
| 1562 | for (i = 0; table[i].refclk; i++) | 
|---|
| 1563 | if (table[i].refclk == display->cdclk.hw.ref && | 
|---|
| 1564 | table[i].cdclk >= min_cdclk) | 
|---|
| 1565 | return table[i].cdclk; | 
|---|
| 1566 |  | 
|---|
| 1567 | drm_WARN(display->drm, 1, | 
|---|
| 1568 | "Cannot satisfy minimum cdclk %d with refclk %u\n", | 
|---|
| 1569 | min_cdclk, display->cdclk.hw.ref); | 
|---|
| 1570 | return 0; | 
|---|
| 1571 | } | 
|---|
| 1572 |  | 
|---|
| 1573 | static int bxt_calc_cdclk_pll_vco(struct intel_display *display, int cdclk) | 
|---|
| 1574 | { | 
|---|
| 1575 | const struct intel_cdclk_vals *table = display->cdclk.table; | 
|---|
| 1576 | int i; | 
|---|
| 1577 |  | 
|---|
| 1578 | if (cdclk == display->cdclk.hw.bypass) | 
|---|
| 1579 | return 0; | 
|---|
| 1580 |  | 
|---|
| 1581 | for (i = 0; table[i].refclk; i++) | 
|---|
| 1582 | if (table[i].refclk == display->cdclk.hw.ref && | 
|---|
| 1583 | table[i].cdclk == cdclk) | 
|---|
| 1584 | return display->cdclk.hw.ref * table[i].ratio; | 
|---|
| 1585 |  | 
|---|
| 1586 | drm_WARN(display->drm, 1, "cdclk %d not valid for refclk %u\n", | 
|---|
| 1587 | cdclk, display->cdclk.hw.ref); | 
|---|
| 1588 | return 0; | 
|---|
| 1589 | } | 
|---|
| 1590 |  | 
|---|
| 1591 | static u8 bxt_calc_voltage_level(int cdclk) | 
|---|
| 1592 | { | 
|---|
| 1593 | return DIV_ROUND_UP(cdclk, 25000); | 
|---|
| 1594 | } | 
|---|
| 1595 |  | 
|---|
| 1596 | static u8 calc_voltage_level(int cdclk, int num_voltage_levels, | 
|---|
| 1597 | const int voltage_level_max_cdclk[]) | 
|---|
| 1598 | { | 
|---|
| 1599 | int voltage_level; | 
|---|
| 1600 |  | 
|---|
| 1601 | for (voltage_level = 0; voltage_level < num_voltage_levels; voltage_level++) { | 
|---|
| 1602 | if (cdclk <= voltage_level_max_cdclk[voltage_level]) | 
|---|
| 1603 | return voltage_level; | 
|---|
| 1604 | } | 
|---|
| 1605 |  | 
|---|
| 1606 | MISSING_CASE(cdclk); | 
|---|
| 1607 | return num_voltage_levels - 1; | 
|---|
| 1608 | } | 
|---|
| 1609 |  | 
|---|
| 1610 | static u8 icl_calc_voltage_level(int cdclk) | 
|---|
| 1611 | { | 
|---|
| 1612 | static const int icl_voltage_level_max_cdclk[] = { | 
|---|
| 1613 | [0] = 312000, | 
|---|
| 1614 | [1] = 556800, | 
|---|
| 1615 | [2] = 652800, | 
|---|
| 1616 | }; | 
|---|
| 1617 |  | 
|---|
| 1618 | return calc_voltage_level(cdclk, | 
|---|
| 1619 | ARRAY_SIZE(icl_voltage_level_max_cdclk), | 
|---|
| 1620 | voltage_level_max_cdclk: icl_voltage_level_max_cdclk); | 
|---|
| 1621 | } | 
|---|
| 1622 |  | 
|---|
| 1623 | static u8 ehl_calc_voltage_level(int cdclk) | 
|---|
| 1624 | { | 
|---|
| 1625 | static const int ehl_voltage_level_max_cdclk[] = { | 
|---|
| 1626 | [0] = 180000, | 
|---|
| 1627 | [1] = 312000, | 
|---|
| 1628 | [2] = 326400, | 
|---|
| 1629 | /* | 
|---|
| 1630 | * Bspec lists the limit as 556.8 MHz, but some JSL | 
|---|
| 1631 | * development boards (at least) boot with 652.8 MHz | 
|---|
| 1632 | */ | 
|---|
| 1633 | [3] = 652800, | 
|---|
| 1634 | }; | 
|---|
| 1635 |  | 
|---|
| 1636 | return calc_voltage_level(cdclk, | 
|---|
| 1637 | ARRAY_SIZE(ehl_voltage_level_max_cdclk), | 
|---|
| 1638 | voltage_level_max_cdclk: ehl_voltage_level_max_cdclk); | 
|---|
| 1639 | } | 
|---|
| 1640 |  | 
|---|
| 1641 | static u8 tgl_calc_voltage_level(int cdclk) | 
|---|
| 1642 | { | 
|---|
| 1643 | static const int tgl_voltage_level_max_cdclk[] = { | 
|---|
| 1644 | [0] = 312000, | 
|---|
| 1645 | [1] = 326400, | 
|---|
| 1646 | [2] = 556800, | 
|---|
| 1647 | [3] = 652800, | 
|---|
| 1648 | }; | 
|---|
| 1649 |  | 
|---|
| 1650 | return calc_voltage_level(cdclk, | 
|---|
| 1651 | ARRAY_SIZE(tgl_voltage_level_max_cdclk), | 
|---|
| 1652 | voltage_level_max_cdclk: tgl_voltage_level_max_cdclk); | 
|---|
| 1653 | } | 
|---|
| 1654 |  | 
|---|
| 1655 | static u8 rplu_calc_voltage_level(int cdclk) | 
|---|
| 1656 | { | 
|---|
| 1657 | static const int rplu_voltage_level_max_cdclk[] = { | 
|---|
| 1658 | [0] = 312000, | 
|---|
| 1659 | [1] = 480000, | 
|---|
| 1660 | [2] = 556800, | 
|---|
| 1661 | [3] = 652800, | 
|---|
| 1662 | }; | 
|---|
| 1663 |  | 
|---|
| 1664 | return calc_voltage_level(cdclk, | 
|---|
| 1665 | ARRAY_SIZE(rplu_voltage_level_max_cdclk), | 
|---|
| 1666 | voltage_level_max_cdclk: rplu_voltage_level_max_cdclk); | 
|---|
| 1667 | } | 
|---|
| 1668 |  | 
|---|
| 1669 | static u8 xe3lpd_calc_voltage_level(int cdclk) | 
|---|
| 1670 | { | 
|---|
| 1671 | /* | 
|---|
| 1672 | * Starting with xe3lpd power controller does not need the voltage | 
|---|
| 1673 | * index when doing the modeset update. This function is best left | 
|---|
| 1674 | * defined but returning 0 to the mask. | 
|---|
| 1675 | */ | 
|---|
| 1676 | return 0; | 
|---|
| 1677 | } | 
|---|
| 1678 |  | 
|---|
| 1679 | static void icl_readout_refclk(struct intel_display *display, | 
|---|
| 1680 | struct intel_cdclk_config *cdclk_config) | 
|---|
| 1681 | { | 
|---|
| 1682 | u32 dssm = intel_de_read(display, SKL_DSSM) & ICL_DSSM_CDCLK_PLL_REFCLK_MASK; | 
|---|
| 1683 |  | 
|---|
| 1684 | switch (dssm) { | 
|---|
| 1685 | default: | 
|---|
| 1686 | MISSING_CASE(dssm); | 
|---|
| 1687 | fallthrough; | 
|---|
| 1688 | case ICL_DSSM_CDCLK_PLL_REFCLK_24MHz: | 
|---|
| 1689 | cdclk_config->ref = 24000; | 
|---|
| 1690 | break; | 
|---|
| 1691 | case ICL_DSSM_CDCLK_PLL_REFCLK_19_2MHz: | 
|---|
| 1692 | cdclk_config->ref = 19200; | 
|---|
| 1693 | break; | 
|---|
| 1694 | case ICL_DSSM_CDCLK_PLL_REFCLK_38_4MHz: | 
|---|
| 1695 | cdclk_config->ref = 38400; | 
|---|
| 1696 | break; | 
|---|
| 1697 | } | 
|---|
| 1698 | } | 
|---|
| 1699 |  | 
|---|
| 1700 | static void bxt_de_pll_readout(struct intel_display *display, | 
|---|
| 1701 | struct intel_cdclk_config *cdclk_config) | 
|---|
| 1702 | { | 
|---|
| 1703 | u32 val, ratio; | 
|---|
| 1704 |  | 
|---|
| 1705 | if (display->platform.dg2) | 
|---|
| 1706 | cdclk_config->ref = 38400; | 
|---|
| 1707 | else if (DISPLAY_VER(display) >= 11) | 
|---|
| 1708 | icl_readout_refclk(display, cdclk_config); | 
|---|
| 1709 | else | 
|---|
| 1710 | cdclk_config->ref = 19200; | 
|---|
| 1711 |  | 
|---|
| 1712 | val = intel_de_read(display, BXT_DE_PLL_ENABLE); | 
|---|
| 1713 | if ((val & BXT_DE_PLL_PLL_ENABLE) == 0 || | 
|---|
| 1714 | (val & BXT_DE_PLL_LOCK) == 0) { | 
|---|
| 1715 | /* | 
|---|
| 1716 | * CDCLK PLL is disabled, the VCO/ratio doesn't matter, but | 
|---|
| 1717 | * setting it to zero is a way to signal that. | 
|---|
| 1718 | */ | 
|---|
| 1719 | cdclk_config->vco = 0; | 
|---|
| 1720 | return; | 
|---|
| 1721 | } | 
|---|
| 1722 |  | 
|---|
| 1723 | /* | 
|---|
| 1724 | * DISPLAY_VER >= 11 have the ratio directly in the PLL enable register, | 
|---|
| 1725 | * gen9lp had it in a separate PLL control register. | 
|---|
| 1726 | */ | 
|---|
| 1727 | if (DISPLAY_VER(display) >= 11) | 
|---|
| 1728 | ratio = val & ICL_CDCLK_PLL_RATIO_MASK; | 
|---|
| 1729 | else | 
|---|
| 1730 | ratio = intel_de_read(display, BXT_DE_PLL_CTL) & BXT_DE_PLL_RATIO_MASK; | 
|---|
| 1731 |  | 
|---|
| 1732 | cdclk_config->vco = ratio * cdclk_config->ref; | 
|---|
| 1733 | } | 
|---|
| 1734 |  | 
|---|
| 1735 | static void bxt_get_cdclk(struct intel_display *display, | 
|---|
| 1736 | struct intel_cdclk_config *cdclk_config) | 
|---|
| 1737 | { | 
|---|
| 1738 | u32 squash_ctl = 0; | 
|---|
| 1739 | u32 divider; | 
|---|
| 1740 | int div; | 
|---|
| 1741 |  | 
|---|
| 1742 | bxt_de_pll_readout(display, cdclk_config); | 
|---|
| 1743 |  | 
|---|
| 1744 | if (DISPLAY_VER(display) >= 12) | 
|---|
| 1745 | cdclk_config->bypass = cdclk_config->ref / 2; | 
|---|
| 1746 | else if (DISPLAY_VER(display) >= 11) | 
|---|
| 1747 | cdclk_config->bypass = 50000; | 
|---|
| 1748 | else | 
|---|
| 1749 | cdclk_config->bypass = cdclk_config->ref; | 
|---|
| 1750 |  | 
|---|
| 1751 | if (cdclk_config->vco == 0) { | 
|---|
| 1752 | cdclk_config->cdclk = cdclk_config->bypass; | 
|---|
| 1753 | goto out; | 
|---|
| 1754 | } | 
|---|
| 1755 |  | 
|---|
| 1756 | divider = intel_de_read(display, CDCLK_CTL) & BXT_CDCLK_CD2X_DIV_SEL_MASK; | 
|---|
| 1757 |  | 
|---|
| 1758 | switch (divider) { | 
|---|
| 1759 | case BXT_CDCLK_CD2X_DIV_SEL_1: | 
|---|
| 1760 | div = 2; | 
|---|
| 1761 | break; | 
|---|
| 1762 | case BXT_CDCLK_CD2X_DIV_SEL_1_5: | 
|---|
| 1763 | div = 3; | 
|---|
| 1764 | break; | 
|---|
| 1765 | case BXT_CDCLK_CD2X_DIV_SEL_2: | 
|---|
| 1766 | div = 4; | 
|---|
| 1767 | break; | 
|---|
| 1768 | case BXT_CDCLK_CD2X_DIV_SEL_4: | 
|---|
| 1769 | div = 8; | 
|---|
| 1770 | break; | 
|---|
| 1771 | default: | 
|---|
| 1772 | MISSING_CASE(divider); | 
|---|
| 1773 | return; | 
|---|
| 1774 | } | 
|---|
| 1775 |  | 
|---|
| 1776 | if (HAS_CDCLK_SQUASH(display)) | 
|---|
| 1777 | squash_ctl = intel_de_read(display, CDCLK_SQUASH_CTL); | 
|---|
| 1778 |  | 
|---|
| 1779 | if (squash_ctl & CDCLK_SQUASH_ENABLE) { | 
|---|
| 1780 | u16 waveform; | 
|---|
| 1781 | int size; | 
|---|
| 1782 |  | 
|---|
| 1783 | size = REG_FIELD_GET(CDCLK_SQUASH_WINDOW_SIZE_MASK, squash_ctl) + 1; | 
|---|
| 1784 | waveform = REG_FIELD_GET(CDCLK_SQUASH_WAVEFORM_MASK, squash_ctl) >> (16 - size); | 
|---|
| 1785 |  | 
|---|
| 1786 | cdclk_config->cdclk = DIV_ROUND_CLOSEST(hweight16(waveform) * | 
|---|
| 1787 | cdclk_config->vco, size * div); | 
|---|
| 1788 | } else { | 
|---|
| 1789 | cdclk_config->cdclk = DIV_ROUND_CLOSEST(cdclk_config->vco, div); | 
|---|
| 1790 | } | 
|---|
| 1791 |  | 
|---|
| 1792 | out: | 
|---|
| 1793 | if (DISPLAY_VER(display) >= 20) | 
|---|
| 1794 | cdclk_config->joined_mbus = intel_de_read(display, MBUS_CTL) & MBUS_JOIN; | 
|---|
| 1795 | /* | 
|---|
| 1796 | * Can't read this out :( Let's assume it's | 
|---|
| 1797 | * at least what the CDCLK frequency requires. | 
|---|
| 1798 | */ | 
|---|
| 1799 | cdclk_config->voltage_level = | 
|---|
| 1800 | intel_cdclk_calc_voltage_level(display, cdclk: cdclk_config->cdclk); | 
|---|
| 1801 | } | 
|---|
| 1802 |  | 
|---|
| 1803 | static void bxt_de_pll_disable(struct intel_display *display) | 
|---|
| 1804 | { | 
|---|
| 1805 | intel_de_write(display, BXT_DE_PLL_ENABLE, val: 0); | 
|---|
| 1806 |  | 
|---|
| 1807 | /* Timeout 200us */ | 
|---|
| 1808 | if (intel_de_wait_for_clear(display, | 
|---|
| 1809 | BXT_DE_PLL_ENABLE, BXT_DE_PLL_LOCK, timeout_ms: 1)) | 
|---|
| 1810 | drm_err(display->drm, "timeout waiting for DE PLL unlock\n"); | 
|---|
| 1811 |  | 
|---|
| 1812 | display->cdclk.hw.vco = 0; | 
|---|
| 1813 | } | 
|---|
| 1814 |  | 
|---|
| 1815 | static void bxt_de_pll_enable(struct intel_display *display, int vco) | 
|---|
| 1816 | { | 
|---|
| 1817 | int ratio = DIV_ROUND_CLOSEST(vco, display->cdclk.hw.ref); | 
|---|
| 1818 |  | 
|---|
| 1819 | intel_de_rmw(display, BXT_DE_PLL_CTL, | 
|---|
| 1820 | BXT_DE_PLL_RATIO_MASK, BXT_DE_PLL_RATIO(ratio)); | 
|---|
| 1821 |  | 
|---|
| 1822 | intel_de_write(display, BXT_DE_PLL_ENABLE, BXT_DE_PLL_PLL_ENABLE); | 
|---|
| 1823 |  | 
|---|
| 1824 | /* Timeout 200us */ | 
|---|
| 1825 | if (intel_de_wait_for_set(display, | 
|---|
| 1826 | BXT_DE_PLL_ENABLE, BXT_DE_PLL_LOCK, timeout_ms: 1)) | 
|---|
| 1827 | drm_err(display->drm, "timeout waiting for DE PLL lock\n"); | 
|---|
| 1828 |  | 
|---|
| 1829 | display->cdclk.hw.vco = vco; | 
|---|
| 1830 | } | 
|---|
| 1831 |  | 
|---|
| 1832 | static void icl_cdclk_pll_disable(struct intel_display *display) | 
|---|
| 1833 | { | 
|---|
| 1834 | intel_de_rmw(display, BXT_DE_PLL_ENABLE, | 
|---|
| 1835 | BXT_DE_PLL_PLL_ENABLE, set: 0); | 
|---|
| 1836 |  | 
|---|
| 1837 | /* Timeout 200us */ | 
|---|
| 1838 | if (intel_de_wait_for_clear(display, BXT_DE_PLL_ENABLE, BXT_DE_PLL_LOCK, timeout_ms: 1)) | 
|---|
| 1839 | drm_err(display->drm, "timeout waiting for CDCLK PLL unlock\n"); | 
|---|
| 1840 |  | 
|---|
| 1841 | display->cdclk.hw.vco = 0; | 
|---|
| 1842 | } | 
|---|
| 1843 |  | 
|---|
| 1844 | static void icl_cdclk_pll_enable(struct intel_display *display, int vco) | 
|---|
| 1845 | { | 
|---|
| 1846 | int ratio = DIV_ROUND_CLOSEST(vco, display->cdclk.hw.ref); | 
|---|
| 1847 | u32 val; | 
|---|
| 1848 |  | 
|---|
| 1849 | val = ICL_CDCLK_PLL_RATIO(ratio); | 
|---|
| 1850 | intel_de_write(display, BXT_DE_PLL_ENABLE, val); | 
|---|
| 1851 |  | 
|---|
| 1852 | val |= BXT_DE_PLL_PLL_ENABLE; | 
|---|
| 1853 | intel_de_write(display, BXT_DE_PLL_ENABLE, val); | 
|---|
| 1854 |  | 
|---|
| 1855 | /* Timeout 200us */ | 
|---|
| 1856 | if (intel_de_wait_for_set(display, BXT_DE_PLL_ENABLE, BXT_DE_PLL_LOCK, timeout_ms: 1)) | 
|---|
| 1857 | drm_err(display->drm, "timeout waiting for CDCLK PLL lock\n"); | 
|---|
| 1858 |  | 
|---|
| 1859 | display->cdclk.hw.vco = vco; | 
|---|
| 1860 | } | 
|---|
| 1861 |  | 
|---|
| 1862 | static void adlp_cdclk_pll_crawl(struct intel_display *display, int vco) | 
|---|
| 1863 | { | 
|---|
| 1864 | int ratio = DIV_ROUND_CLOSEST(vco, display->cdclk.hw.ref); | 
|---|
| 1865 | u32 val; | 
|---|
| 1866 |  | 
|---|
| 1867 | /* Write PLL ratio without disabling */ | 
|---|
| 1868 | val = ICL_CDCLK_PLL_RATIO(ratio) | BXT_DE_PLL_PLL_ENABLE; | 
|---|
| 1869 | intel_de_write(display, BXT_DE_PLL_ENABLE, val); | 
|---|
| 1870 |  | 
|---|
| 1871 | /* Submit freq change request */ | 
|---|
| 1872 | val |= BXT_DE_PLL_FREQ_REQ; | 
|---|
| 1873 | intel_de_write(display, BXT_DE_PLL_ENABLE, val); | 
|---|
| 1874 |  | 
|---|
| 1875 | /* Timeout 200us */ | 
|---|
| 1876 | if (intel_de_wait_for_set(display, BXT_DE_PLL_ENABLE, | 
|---|
| 1877 | BXT_DE_PLL_LOCK | BXT_DE_PLL_FREQ_REQ_ACK, timeout_ms: 1)) | 
|---|
| 1878 | drm_err(display->drm, "timeout waiting for FREQ change request ack\n"); | 
|---|
| 1879 |  | 
|---|
| 1880 | val &= ~BXT_DE_PLL_FREQ_REQ; | 
|---|
| 1881 | intel_de_write(display, BXT_DE_PLL_ENABLE, val); | 
|---|
| 1882 |  | 
|---|
| 1883 | display->cdclk.hw.vco = vco; | 
|---|
| 1884 | } | 
|---|
| 1885 |  | 
|---|
| 1886 | static u32 bxt_cdclk_cd2x_pipe(struct intel_display *display, enum pipe pipe) | 
|---|
| 1887 | { | 
|---|
| 1888 | if (DISPLAY_VER(display) >= 12) { | 
|---|
| 1889 | if (pipe == INVALID_PIPE) | 
|---|
| 1890 | return TGL_CDCLK_CD2X_PIPE_NONE; | 
|---|
| 1891 | else | 
|---|
| 1892 | return TGL_CDCLK_CD2X_PIPE(pipe); | 
|---|
| 1893 | } else if (DISPLAY_VER(display) >= 11) { | 
|---|
| 1894 | if (pipe == INVALID_PIPE) | 
|---|
| 1895 | return ICL_CDCLK_CD2X_PIPE_NONE; | 
|---|
| 1896 | else | 
|---|
| 1897 | return ICL_CDCLK_CD2X_PIPE(pipe); | 
|---|
| 1898 | } else { | 
|---|
| 1899 | if (pipe == INVALID_PIPE) | 
|---|
| 1900 | return BXT_CDCLK_CD2X_PIPE_NONE; | 
|---|
| 1901 | else | 
|---|
| 1902 | return BXT_CDCLK_CD2X_PIPE(pipe); | 
|---|
| 1903 | } | 
|---|
| 1904 | } | 
|---|
| 1905 |  | 
|---|
| 1906 | static u32 bxt_cdclk_cd2x_div_sel(struct intel_display *display, | 
|---|
| 1907 | int cdclk, int vco, u16 waveform) | 
|---|
| 1908 | { | 
|---|
| 1909 | /* cdclk = vco / 2 / div{1,1.5,2,4} */ | 
|---|
| 1910 | switch (cdclk_divider(cdclk, vco, waveform)) { | 
|---|
| 1911 | default: | 
|---|
| 1912 | drm_WARN_ON(display->drm, | 
|---|
| 1913 | cdclk != display->cdclk.hw.bypass); | 
|---|
| 1914 | drm_WARN_ON(display->drm, vco != 0); | 
|---|
| 1915 | fallthrough; | 
|---|
| 1916 | case 2: | 
|---|
| 1917 | return BXT_CDCLK_CD2X_DIV_SEL_1; | 
|---|
| 1918 | case 3: | 
|---|
| 1919 | return BXT_CDCLK_CD2X_DIV_SEL_1_5; | 
|---|
| 1920 | case 4: | 
|---|
| 1921 | return BXT_CDCLK_CD2X_DIV_SEL_2; | 
|---|
| 1922 | case 8: | 
|---|
| 1923 | return BXT_CDCLK_CD2X_DIV_SEL_4; | 
|---|
| 1924 | } | 
|---|
| 1925 | } | 
|---|
| 1926 |  | 
|---|
| 1927 | static u16 cdclk_squash_waveform(struct intel_display *display, | 
|---|
| 1928 | int cdclk) | 
|---|
| 1929 | { | 
|---|
| 1930 | const struct intel_cdclk_vals *table = display->cdclk.table; | 
|---|
| 1931 | int i; | 
|---|
| 1932 |  | 
|---|
| 1933 | if (cdclk == display->cdclk.hw.bypass) | 
|---|
| 1934 | return 0; | 
|---|
| 1935 |  | 
|---|
| 1936 | for (i = 0; table[i].refclk; i++) | 
|---|
| 1937 | if (table[i].refclk == display->cdclk.hw.ref && | 
|---|
| 1938 | table[i].cdclk == cdclk) | 
|---|
| 1939 | return table[i].waveform; | 
|---|
| 1940 |  | 
|---|
| 1941 | drm_WARN(display->drm, 1, "cdclk %d not valid for refclk %u\n", | 
|---|
| 1942 | cdclk, display->cdclk.hw.ref); | 
|---|
| 1943 |  | 
|---|
| 1944 | return 0xffff; | 
|---|
| 1945 | } | 
|---|
| 1946 |  | 
|---|
| 1947 | static void icl_cdclk_pll_update(struct intel_display *display, int vco) | 
|---|
| 1948 | { | 
|---|
| 1949 | if (display->cdclk.hw.vco != 0 && | 
|---|
| 1950 | display->cdclk.hw.vco != vco) | 
|---|
| 1951 | icl_cdclk_pll_disable(display); | 
|---|
| 1952 |  | 
|---|
| 1953 | if (display->cdclk.hw.vco != vco) | 
|---|
| 1954 | icl_cdclk_pll_enable(display, vco); | 
|---|
| 1955 | } | 
|---|
| 1956 |  | 
|---|
| 1957 | static void bxt_cdclk_pll_update(struct intel_display *display, int vco) | 
|---|
| 1958 | { | 
|---|
| 1959 | if (display->cdclk.hw.vco != 0 && | 
|---|
| 1960 | display->cdclk.hw.vco != vco) | 
|---|
| 1961 | bxt_de_pll_disable(display); | 
|---|
| 1962 |  | 
|---|
| 1963 | if (display->cdclk.hw.vco != vco) | 
|---|
| 1964 | bxt_de_pll_enable(display, vco); | 
|---|
| 1965 | } | 
|---|
| 1966 |  | 
|---|
| 1967 | static void dg2_cdclk_squash_program(struct intel_display *display, | 
|---|
| 1968 | u16 waveform) | 
|---|
| 1969 | { | 
|---|
| 1970 | u32 squash_ctl = 0; | 
|---|
| 1971 |  | 
|---|
| 1972 | if (waveform) | 
|---|
| 1973 | squash_ctl = CDCLK_SQUASH_ENABLE | | 
|---|
| 1974 | CDCLK_SQUASH_WINDOW_SIZE(0xf) | waveform; | 
|---|
| 1975 |  | 
|---|
| 1976 | intel_de_write(display, CDCLK_SQUASH_CTL, val: squash_ctl); | 
|---|
| 1977 | } | 
|---|
| 1978 |  | 
|---|
| 1979 | static bool cdclk_pll_is_unknown(unsigned int vco) | 
|---|
| 1980 | { | 
|---|
| 1981 | /* | 
|---|
| 1982 | * Ensure driver does not take the crawl path for the | 
|---|
| 1983 | * case when the vco is set to ~0 in the | 
|---|
| 1984 | * sanitize path. | 
|---|
| 1985 | */ | 
|---|
| 1986 | return vco == ~0; | 
|---|
| 1987 | } | 
|---|
| 1988 |  | 
|---|
| 1989 | static bool mdclk_source_is_cdclk_pll(struct intel_display *display) | 
|---|
| 1990 | { | 
|---|
| 1991 | return DISPLAY_VER(display) >= 20; | 
|---|
| 1992 | } | 
|---|
| 1993 |  | 
|---|
| 1994 | static u32 xe2lpd_mdclk_source_sel(struct intel_display *display) | 
|---|
| 1995 | { | 
|---|
| 1996 | if (mdclk_source_is_cdclk_pll(display)) | 
|---|
| 1997 | return MDCLK_SOURCE_SEL_CDCLK_PLL; | 
|---|
| 1998 |  | 
|---|
| 1999 | return MDCLK_SOURCE_SEL_CD2XCLK; | 
|---|
| 2000 | } | 
|---|
| 2001 |  | 
|---|
| 2002 | int intel_mdclk_cdclk_ratio(struct intel_display *display, | 
|---|
| 2003 | const struct intel_cdclk_config *cdclk_config) | 
|---|
| 2004 | { | 
|---|
| 2005 | if (mdclk_source_is_cdclk_pll(display)) | 
|---|
| 2006 | return DIV_ROUND_UP(cdclk_config->vco, cdclk_config->cdclk); | 
|---|
| 2007 |  | 
|---|
| 2008 | /* Otherwise, source for MDCLK is CD2XCLK. */ | 
|---|
| 2009 | return 2; | 
|---|
| 2010 | } | 
|---|
| 2011 |  | 
|---|
| 2012 | static void xe2lpd_mdclk_cdclk_ratio_program(struct intel_display *display, | 
|---|
| 2013 | const struct intel_cdclk_config *cdclk_config) | 
|---|
| 2014 | { | 
|---|
| 2015 | intel_dbuf_mdclk_cdclk_ratio_update(display, | 
|---|
| 2016 | ratio: intel_mdclk_cdclk_ratio(display, cdclk_config), | 
|---|
| 2017 | joined_mbus: cdclk_config->joined_mbus); | 
|---|
| 2018 | } | 
|---|
| 2019 |  | 
|---|
| 2020 | static bool cdclk_compute_crawl_and_squash_midpoint(struct intel_display *display, | 
|---|
| 2021 | const struct intel_cdclk_config *old_cdclk_config, | 
|---|
| 2022 | const struct intel_cdclk_config *new_cdclk_config, | 
|---|
| 2023 | struct intel_cdclk_config *mid_cdclk_config) | 
|---|
| 2024 | { | 
|---|
| 2025 | u16 old_waveform, new_waveform, mid_waveform; | 
|---|
| 2026 | int old_div, new_div, mid_div; | 
|---|
| 2027 |  | 
|---|
| 2028 | /* Return if PLL is in an unknown state, force a complete disable and re-enable. */ | 
|---|
| 2029 | if (cdclk_pll_is_unknown(vco: old_cdclk_config->vco)) | 
|---|
| 2030 | return false; | 
|---|
| 2031 |  | 
|---|
| 2032 | /* Return if both Squash and Crawl are not present */ | 
|---|
| 2033 | if (!HAS_CDCLK_CRAWL(display) || !HAS_CDCLK_SQUASH(display)) | 
|---|
| 2034 | return false; | 
|---|
| 2035 |  | 
|---|
| 2036 | old_waveform = cdclk_squash_waveform(display, cdclk: old_cdclk_config->cdclk); | 
|---|
| 2037 | new_waveform = cdclk_squash_waveform(display, cdclk: new_cdclk_config->cdclk); | 
|---|
| 2038 |  | 
|---|
| 2039 | /* Return if Squash only or Crawl only is the desired action */ | 
|---|
| 2040 | if (old_cdclk_config->vco == 0 || new_cdclk_config->vco == 0 || | 
|---|
| 2041 | old_cdclk_config->vco == new_cdclk_config->vco || | 
|---|
| 2042 | old_waveform == new_waveform) | 
|---|
| 2043 | return false; | 
|---|
| 2044 |  | 
|---|
| 2045 | old_div = cdclk_divider(cdclk: old_cdclk_config->cdclk, | 
|---|
| 2046 | vco: old_cdclk_config->vco, waveform: old_waveform); | 
|---|
| 2047 | new_div = cdclk_divider(cdclk: new_cdclk_config->cdclk, | 
|---|
| 2048 | vco: new_cdclk_config->vco, waveform: new_waveform); | 
|---|
| 2049 |  | 
|---|
| 2050 | /* | 
|---|
| 2051 | * Should not happen currently. We might need more midpoint | 
|---|
| 2052 | * transitions if we need to also change the cd2x divider. | 
|---|
| 2053 | */ | 
|---|
| 2054 | if (drm_WARN_ON(display->drm, old_div != new_div)) | 
|---|
| 2055 | return false; | 
|---|
| 2056 |  | 
|---|
| 2057 | *mid_cdclk_config = *new_cdclk_config; | 
|---|
| 2058 |  | 
|---|
| 2059 | /* | 
|---|
| 2060 | * Populate the mid_cdclk_config accordingly. | 
|---|
| 2061 | * - If moving to a higher cdclk, the desired action is squashing. | 
|---|
| 2062 | * The mid cdclk config should have the new (squash) waveform. | 
|---|
| 2063 | * - If moving to a lower cdclk, the desired action is crawling. | 
|---|
| 2064 | * The mid cdclk config should have the new vco. | 
|---|
| 2065 | */ | 
|---|
| 2066 |  | 
|---|
| 2067 | if (cdclk_squash_divider(waveform: new_waveform) > cdclk_squash_divider(waveform: old_waveform)) { | 
|---|
| 2068 | mid_cdclk_config->vco = old_cdclk_config->vco; | 
|---|
| 2069 | mid_div = old_div; | 
|---|
| 2070 | mid_waveform = new_waveform; | 
|---|
| 2071 | } else { | 
|---|
| 2072 | mid_cdclk_config->vco = new_cdclk_config->vco; | 
|---|
| 2073 | mid_div = new_div; | 
|---|
| 2074 | mid_waveform = old_waveform; | 
|---|
| 2075 | } | 
|---|
| 2076 |  | 
|---|
| 2077 | mid_cdclk_config->cdclk = DIV_ROUND_CLOSEST(cdclk_squash_divider(mid_waveform) * | 
|---|
| 2078 | mid_cdclk_config->vco, | 
|---|
| 2079 | cdclk_squash_len * mid_div); | 
|---|
| 2080 |  | 
|---|
| 2081 | /* make sure the mid clock came out sane */ | 
|---|
| 2082 |  | 
|---|
| 2083 | drm_WARN_ON(display->drm, mid_cdclk_config->cdclk < | 
|---|
| 2084 | min(old_cdclk_config->cdclk, new_cdclk_config->cdclk)); | 
|---|
| 2085 | drm_WARN_ON(display->drm, mid_cdclk_config->cdclk > | 
|---|
| 2086 | display->cdclk.max_cdclk_freq); | 
|---|
| 2087 | drm_WARN_ON(display->drm, cdclk_squash_waveform(display, mid_cdclk_config->cdclk) != | 
|---|
| 2088 | mid_waveform); | 
|---|
| 2089 |  | 
|---|
| 2090 | return true; | 
|---|
| 2091 | } | 
|---|
| 2092 |  | 
|---|
| 2093 | static bool pll_enable_wa_needed(struct intel_display *display) | 
|---|
| 2094 | { | 
|---|
| 2095 | return (DISPLAY_VERx100(display) == 2000 || | 
|---|
| 2096 | DISPLAY_VERx100(display) == 1400 || | 
|---|
| 2097 | display->platform.dg2) && | 
|---|
| 2098 | display->cdclk.hw.vco > 0; | 
|---|
| 2099 | } | 
|---|
| 2100 |  | 
|---|
| 2101 | static u32 bxt_cdclk_ctl(struct intel_display *display, | 
|---|
| 2102 | const struct intel_cdclk_config *cdclk_config, | 
|---|
| 2103 | enum pipe pipe) | 
|---|
| 2104 | { | 
|---|
| 2105 | int cdclk = cdclk_config->cdclk; | 
|---|
| 2106 | int vco = cdclk_config->vco; | 
|---|
| 2107 | u16 waveform; | 
|---|
| 2108 | u32 val; | 
|---|
| 2109 |  | 
|---|
| 2110 | waveform = cdclk_squash_waveform(display, cdclk); | 
|---|
| 2111 |  | 
|---|
| 2112 | val = bxt_cdclk_cd2x_div_sel(display, cdclk, vco, waveform) | | 
|---|
| 2113 | bxt_cdclk_cd2x_pipe(display, pipe); | 
|---|
| 2114 |  | 
|---|
| 2115 | /* | 
|---|
| 2116 | * Disable SSA Precharge when CD clock frequency < 500 MHz, | 
|---|
| 2117 | * enable otherwise. | 
|---|
| 2118 | */ | 
|---|
| 2119 | if ((display->platform.geminilake || display->platform.broxton) && | 
|---|
| 2120 | cdclk >= 500000) | 
|---|
| 2121 | val |= BXT_CDCLK_SSA_PRECHARGE_ENABLE; | 
|---|
| 2122 |  | 
|---|
| 2123 | if (DISPLAY_VER(display) >= 20) | 
|---|
| 2124 | val |= xe2lpd_mdclk_source_sel(display); | 
|---|
| 2125 | else | 
|---|
| 2126 | val |= skl_cdclk_decimal(cdclk); | 
|---|
| 2127 |  | 
|---|
| 2128 | return val; | 
|---|
| 2129 | } | 
|---|
| 2130 |  | 
|---|
| 2131 | static void _bxt_set_cdclk(struct intel_display *display, | 
|---|
| 2132 | const struct intel_cdclk_config *cdclk_config, | 
|---|
| 2133 | enum pipe pipe) | 
|---|
| 2134 | { | 
|---|
| 2135 | int cdclk = cdclk_config->cdclk; | 
|---|
| 2136 | int vco = cdclk_config->vco; | 
|---|
| 2137 |  | 
|---|
| 2138 | if (HAS_CDCLK_CRAWL(display) && display->cdclk.hw.vco > 0 && vco > 0 && | 
|---|
| 2139 | !cdclk_pll_is_unknown(vco: display->cdclk.hw.vco)) { | 
|---|
| 2140 | if (display->cdclk.hw.vco != vco) | 
|---|
| 2141 | adlp_cdclk_pll_crawl(display, vco); | 
|---|
| 2142 | } else if (DISPLAY_VER(display) >= 11) { | 
|---|
| 2143 | /* wa_15010685871: dg2, mtl */ | 
|---|
| 2144 | if (pll_enable_wa_needed(display)) | 
|---|
| 2145 | dg2_cdclk_squash_program(display, waveform: 0); | 
|---|
| 2146 |  | 
|---|
| 2147 | icl_cdclk_pll_update(display, vco); | 
|---|
| 2148 | } else { | 
|---|
| 2149 | bxt_cdclk_pll_update(display, vco); | 
|---|
| 2150 | } | 
|---|
| 2151 |  | 
|---|
| 2152 | if (HAS_CDCLK_SQUASH(display)) { | 
|---|
| 2153 | u16 waveform = cdclk_squash_waveform(display, cdclk); | 
|---|
| 2154 |  | 
|---|
| 2155 | dg2_cdclk_squash_program(display, waveform); | 
|---|
| 2156 | } | 
|---|
| 2157 |  | 
|---|
| 2158 | intel_de_write(display, CDCLK_CTL, val: bxt_cdclk_ctl(display, cdclk_config, pipe)); | 
|---|
| 2159 |  | 
|---|
| 2160 | if (pipe != INVALID_PIPE) | 
|---|
| 2161 | intel_crtc_wait_for_next_vblank(crtc: intel_crtc_for_pipe(display, pipe)); | 
|---|
| 2162 | } | 
|---|
| 2163 |  | 
|---|
| 2164 | static void bxt_set_cdclk(struct intel_display *display, | 
|---|
| 2165 | const struct intel_cdclk_config *cdclk_config, | 
|---|
| 2166 | enum pipe pipe) | 
|---|
| 2167 | { | 
|---|
| 2168 | struct intel_cdclk_config mid_cdclk_config; | 
|---|
| 2169 | int cdclk = cdclk_config->cdclk; | 
|---|
| 2170 | int ret = 0; | 
|---|
| 2171 |  | 
|---|
| 2172 | /* | 
|---|
| 2173 | * Inform power controller of upcoming frequency change. | 
|---|
| 2174 | * Display versions 14 and beyond do not follow the PUnit | 
|---|
| 2175 | * mailbox communication, skip | 
|---|
| 2176 | * this step. | 
|---|
| 2177 | */ | 
|---|
| 2178 | if (DISPLAY_VER(display) >= 14 || display->platform.dg2) | 
|---|
| 2179 | ; /* NOOP */ | 
|---|
| 2180 | else if (DISPLAY_VER(display) >= 11) | 
|---|
| 2181 | ret = intel_pcode_request(drm: display->drm, SKL_PCODE_CDCLK_CONTROL, | 
|---|
| 2182 | SKL_CDCLK_PREPARE_FOR_CHANGE, | 
|---|
| 2183 | SKL_CDCLK_READY_FOR_CHANGE, | 
|---|
| 2184 | SKL_CDCLK_READY_FOR_CHANGE, timeout_base_ms: 3); | 
|---|
| 2185 | else | 
|---|
| 2186 | /* | 
|---|
| 2187 | * BSpec requires us to wait up to 150usec, but that leads to | 
|---|
| 2188 | * timeouts; the 2ms used here is based on experiment. | 
|---|
| 2189 | */ | 
|---|
| 2190 | ret = intel_pcode_write_timeout(drm: display->drm, | 
|---|
| 2191 | HSW_PCODE_DE_WRITE_FREQ_REQ, | 
|---|
| 2192 | val: 0x80000000, timeout_ms: 2); | 
|---|
| 2193 |  | 
|---|
| 2194 | if (ret) { | 
|---|
| 2195 | drm_err(display->drm, | 
|---|
| 2196 | "Failed to inform PCU about cdclk change (err %d, freq %d)\n", | 
|---|
| 2197 | ret, cdclk); | 
|---|
| 2198 | return; | 
|---|
| 2199 | } | 
|---|
| 2200 |  | 
|---|
| 2201 | if (DISPLAY_VER(display) >= 20 && cdclk < display->cdclk.hw.cdclk) | 
|---|
| 2202 | xe2lpd_mdclk_cdclk_ratio_program(display, cdclk_config); | 
|---|
| 2203 |  | 
|---|
| 2204 | if (cdclk_compute_crawl_and_squash_midpoint(display, old_cdclk_config: &display->cdclk.hw, | 
|---|
| 2205 | new_cdclk_config: cdclk_config, mid_cdclk_config: &mid_cdclk_config)) { | 
|---|
| 2206 | _bxt_set_cdclk(display, cdclk_config: &mid_cdclk_config, pipe); | 
|---|
| 2207 | _bxt_set_cdclk(display, cdclk_config, pipe); | 
|---|
| 2208 | } else { | 
|---|
| 2209 | _bxt_set_cdclk(display, cdclk_config, pipe); | 
|---|
| 2210 | } | 
|---|
| 2211 |  | 
|---|
| 2212 | if (DISPLAY_VER(display) >= 20 && cdclk > display->cdclk.hw.cdclk) | 
|---|
| 2213 | xe2lpd_mdclk_cdclk_ratio_program(display, cdclk_config); | 
|---|
| 2214 |  | 
|---|
| 2215 | if (DISPLAY_VER(display) >= 14) | 
|---|
| 2216 | /* | 
|---|
| 2217 | * NOOP - No Pcode communication needed for | 
|---|
| 2218 | * Display versions 14 and beyond | 
|---|
| 2219 | */; | 
|---|
| 2220 | else if (DISPLAY_VER(display) >= 11 && !display->platform.dg2) | 
|---|
| 2221 | ret = intel_pcode_write(display->drm, SKL_PCODE_CDCLK_CONTROL, | 
|---|
| 2222 | cdclk_config->voltage_level); | 
|---|
| 2223 | if (DISPLAY_VER(display) < 11) { | 
|---|
| 2224 | /* | 
|---|
| 2225 | * The timeout isn't specified, the 2ms used here is based on | 
|---|
| 2226 | * experiment. | 
|---|
| 2227 | * FIXME: Waiting for the request completion could be delayed | 
|---|
| 2228 | * until the next PCODE request based on BSpec. | 
|---|
| 2229 | */ | 
|---|
| 2230 | ret = intel_pcode_write_timeout(drm: display->drm, | 
|---|
| 2231 | HSW_PCODE_DE_WRITE_FREQ_REQ, | 
|---|
| 2232 | val: cdclk_config->voltage_level, timeout_ms: 2); | 
|---|
| 2233 | } | 
|---|
| 2234 | if (ret) { | 
|---|
| 2235 | drm_err(display->drm, | 
|---|
| 2236 | "PCode CDCLK freq set failed, (err %d, freq %d)\n", | 
|---|
| 2237 | ret, cdclk); | 
|---|
| 2238 | return; | 
|---|
| 2239 | } | 
|---|
| 2240 |  | 
|---|
| 2241 | intel_update_cdclk(display); | 
|---|
| 2242 |  | 
|---|
| 2243 | if (DISPLAY_VER(display) >= 11) | 
|---|
| 2244 | /* | 
|---|
| 2245 | * Can't read out the voltage level :( | 
|---|
| 2246 | * Let's just assume everything is as expected. | 
|---|
| 2247 | */ | 
|---|
| 2248 | display->cdclk.hw.voltage_level = cdclk_config->voltage_level; | 
|---|
| 2249 | } | 
|---|
| 2250 |  | 
|---|
| 2251 | static void bxt_sanitize_cdclk(struct intel_display *display) | 
|---|
| 2252 | { | 
|---|
| 2253 | u32 cdctl, expected; | 
|---|
| 2254 | int cdclk, vco; | 
|---|
| 2255 |  | 
|---|
| 2256 | intel_update_cdclk(display); | 
|---|
| 2257 | intel_cdclk_dump_config(display, cdclk_config: &display->cdclk.hw, context: "Current CDCLK"); | 
|---|
| 2258 |  | 
|---|
| 2259 | if (display->cdclk.hw.vco == 0 || | 
|---|
| 2260 | display->cdclk.hw.cdclk == display->cdclk.hw.bypass) | 
|---|
| 2261 | goto sanitize; | 
|---|
| 2262 |  | 
|---|
| 2263 | /* Make sure this is a legal cdclk value for the platform */ | 
|---|
| 2264 | cdclk = bxt_calc_cdclk(display, min_cdclk: display->cdclk.hw.cdclk); | 
|---|
| 2265 | if (cdclk != display->cdclk.hw.cdclk) | 
|---|
| 2266 | goto sanitize; | 
|---|
| 2267 |  | 
|---|
| 2268 | /* Make sure the VCO is correct for the cdclk */ | 
|---|
| 2269 | vco = bxt_calc_cdclk_pll_vco(display, cdclk); | 
|---|
| 2270 | if (vco != display->cdclk.hw.vco) | 
|---|
| 2271 | goto sanitize; | 
|---|
| 2272 |  | 
|---|
| 2273 | /* | 
|---|
| 2274 | * Some BIOS versions leave an incorrect decimal frequency value and | 
|---|
| 2275 | * set reserved MBZ bits in CDCLK_CTL at least during exiting from S4, | 
|---|
| 2276 | * so sanitize this register. | 
|---|
| 2277 | */ | 
|---|
| 2278 | cdctl = intel_de_read(display, CDCLK_CTL); | 
|---|
| 2279 | expected = bxt_cdclk_ctl(display, cdclk_config: &display->cdclk.hw, pipe: INVALID_PIPE); | 
|---|
| 2280 |  | 
|---|
| 2281 | /* | 
|---|
| 2282 | * Let's ignore the pipe field, since BIOS could have configured the | 
|---|
| 2283 | * dividers both syncing to an active pipe, or asynchronously | 
|---|
| 2284 | * (PIPE_NONE). | 
|---|
| 2285 | */ | 
|---|
| 2286 | cdctl &= ~bxt_cdclk_cd2x_pipe(display, pipe: INVALID_PIPE); | 
|---|
| 2287 | expected &= ~bxt_cdclk_cd2x_pipe(display, pipe: INVALID_PIPE); | 
|---|
| 2288 |  | 
|---|
| 2289 | if (cdctl == expected) | 
|---|
| 2290 | /* All well; nothing to sanitize */ | 
|---|
| 2291 | return; | 
|---|
| 2292 |  | 
|---|
| 2293 | sanitize: | 
|---|
| 2294 | drm_dbg_kms(display->drm, "Sanitizing cdclk programmed by pre-os\n"); | 
|---|
| 2295 |  | 
|---|
| 2296 | /* force cdclk programming */ | 
|---|
| 2297 | display->cdclk.hw.cdclk = 0; | 
|---|
| 2298 |  | 
|---|
| 2299 | /* force full PLL disable + enable */ | 
|---|
| 2300 | display->cdclk.hw.vco = ~0; | 
|---|
| 2301 | } | 
|---|
| 2302 |  | 
|---|
| 2303 | static void bxt_cdclk_init_hw(struct intel_display *display) | 
|---|
| 2304 | { | 
|---|
| 2305 | struct intel_cdclk_config cdclk_config; | 
|---|
| 2306 |  | 
|---|
| 2307 | bxt_sanitize_cdclk(display); | 
|---|
| 2308 |  | 
|---|
| 2309 | if (display->cdclk.hw.cdclk != 0 && | 
|---|
| 2310 | display->cdclk.hw.vco != 0) | 
|---|
| 2311 | return; | 
|---|
| 2312 |  | 
|---|
| 2313 | cdclk_config = display->cdclk.hw; | 
|---|
| 2314 |  | 
|---|
| 2315 | /* | 
|---|
| 2316 | * FIXME: | 
|---|
| 2317 | * - The initial CDCLK needs to be read from VBT. | 
|---|
| 2318 | *   Need to make this change after VBT has changes for BXT. | 
|---|
| 2319 | */ | 
|---|
| 2320 | cdclk_config.cdclk = bxt_calc_cdclk(display, min_cdclk: 0); | 
|---|
| 2321 | cdclk_config.vco = bxt_calc_cdclk_pll_vco(display, cdclk: cdclk_config.cdclk); | 
|---|
| 2322 | cdclk_config.voltage_level = | 
|---|
| 2323 | intel_cdclk_calc_voltage_level(display, cdclk: cdclk_config.cdclk); | 
|---|
| 2324 |  | 
|---|
| 2325 | bxt_set_cdclk(display, cdclk_config: &cdclk_config, pipe: INVALID_PIPE); | 
|---|
| 2326 | } | 
|---|
| 2327 |  | 
|---|
| 2328 | static void bxt_cdclk_uninit_hw(struct intel_display *display) | 
|---|
| 2329 | { | 
|---|
| 2330 | struct intel_cdclk_config cdclk_config = display->cdclk.hw; | 
|---|
| 2331 |  | 
|---|
| 2332 | cdclk_config.cdclk = cdclk_config.bypass; | 
|---|
| 2333 | cdclk_config.vco = 0; | 
|---|
| 2334 | cdclk_config.voltage_level = | 
|---|
| 2335 | intel_cdclk_calc_voltage_level(display, cdclk: cdclk_config.cdclk); | 
|---|
| 2336 |  | 
|---|
| 2337 | bxt_set_cdclk(display, cdclk_config: &cdclk_config, pipe: INVALID_PIPE); | 
|---|
| 2338 | } | 
|---|
| 2339 |  | 
|---|
| 2340 | /** | 
|---|
| 2341 | * intel_cdclk_init_hw - Initialize CDCLK hardware | 
|---|
| 2342 | * @display: display instance | 
|---|
| 2343 | * | 
|---|
| 2344 | * Initialize CDCLK. This consists mainly of initializing display->cdclk.hw and | 
|---|
| 2345 | * sanitizing the state of the hardware if needed. This is generally done only | 
|---|
| 2346 | * during the display core initialization sequence, after which the DMC will | 
|---|
| 2347 | * take care of turning CDCLK off/on as needed. | 
|---|
| 2348 | */ | 
|---|
| 2349 | void intel_cdclk_init_hw(struct intel_display *display) | 
|---|
| 2350 | { | 
|---|
| 2351 | if (DISPLAY_VER(display) >= 10 || display->platform.broxton) | 
|---|
| 2352 | bxt_cdclk_init_hw(display); | 
|---|
| 2353 | else if (DISPLAY_VER(display) == 9) | 
|---|
| 2354 | skl_cdclk_init_hw(display); | 
|---|
| 2355 | } | 
|---|
| 2356 |  | 
|---|
| 2357 | /** | 
|---|
| 2358 | * intel_cdclk_uninit_hw - Uninitialize CDCLK hardware | 
|---|
| 2359 | * @display: display instance | 
|---|
| 2360 | * | 
|---|
| 2361 | * Uninitialize CDCLK. This is done only during the display core | 
|---|
| 2362 | * uninitialization sequence. | 
|---|
| 2363 | */ | 
|---|
| 2364 | void intel_cdclk_uninit_hw(struct intel_display *display) | 
|---|
| 2365 | { | 
|---|
| 2366 | if (DISPLAY_VER(display) >= 10 || display->platform.broxton) | 
|---|
| 2367 | bxt_cdclk_uninit_hw(display); | 
|---|
| 2368 | else if (DISPLAY_VER(display) == 9) | 
|---|
| 2369 | skl_cdclk_uninit_hw(display); | 
|---|
| 2370 | } | 
|---|
| 2371 |  | 
|---|
| 2372 | static bool intel_cdclk_can_crawl_and_squash(struct intel_display *display, | 
|---|
| 2373 | const struct intel_cdclk_config *a, | 
|---|
| 2374 | const struct intel_cdclk_config *b) | 
|---|
| 2375 | { | 
|---|
| 2376 | u16 old_waveform; | 
|---|
| 2377 | u16 new_waveform; | 
|---|
| 2378 |  | 
|---|
| 2379 | drm_WARN_ON(display->drm, cdclk_pll_is_unknown(a->vco)); | 
|---|
| 2380 |  | 
|---|
| 2381 | if (a->vco == 0 || b->vco == 0) | 
|---|
| 2382 | return false; | 
|---|
| 2383 |  | 
|---|
| 2384 | if (!HAS_CDCLK_CRAWL(display) || !HAS_CDCLK_SQUASH(display)) | 
|---|
| 2385 | return false; | 
|---|
| 2386 |  | 
|---|
| 2387 | old_waveform = cdclk_squash_waveform(display, cdclk: a->cdclk); | 
|---|
| 2388 | new_waveform = cdclk_squash_waveform(display, cdclk: b->cdclk); | 
|---|
| 2389 |  | 
|---|
| 2390 | return a->vco != b->vco && | 
|---|
| 2391 | old_waveform != new_waveform; | 
|---|
| 2392 | } | 
|---|
| 2393 |  | 
|---|
| 2394 | static bool intel_cdclk_can_crawl(struct intel_display *display, | 
|---|
| 2395 | const struct intel_cdclk_config *a, | 
|---|
| 2396 | const struct intel_cdclk_config *b) | 
|---|
| 2397 | { | 
|---|
| 2398 | int a_div, b_div; | 
|---|
| 2399 |  | 
|---|
| 2400 | if (!HAS_CDCLK_CRAWL(display)) | 
|---|
| 2401 | return false; | 
|---|
| 2402 |  | 
|---|
| 2403 | /* | 
|---|
| 2404 | * The vco and cd2x divider will change independently | 
|---|
| 2405 | * from each, so we disallow cd2x change when crawling. | 
|---|
| 2406 | */ | 
|---|
| 2407 | a_div = DIV_ROUND_CLOSEST(a->vco, a->cdclk); | 
|---|
| 2408 | b_div = DIV_ROUND_CLOSEST(b->vco, b->cdclk); | 
|---|
| 2409 |  | 
|---|
| 2410 | return a->vco != 0 && b->vco != 0 && | 
|---|
| 2411 | a->vco != b->vco && | 
|---|
| 2412 | a_div == b_div && | 
|---|
| 2413 | a->ref == b->ref; | 
|---|
| 2414 | } | 
|---|
| 2415 |  | 
|---|
| 2416 | static bool intel_cdclk_can_squash(struct intel_display *display, | 
|---|
| 2417 | const struct intel_cdclk_config *a, | 
|---|
| 2418 | const struct intel_cdclk_config *b) | 
|---|
| 2419 | { | 
|---|
| 2420 | /* | 
|---|
| 2421 | * FIXME should store a bit more state in intel_cdclk_config | 
|---|
| 2422 | * to differentiate squasher vs. cd2x divider properly. For | 
|---|
| 2423 | * the moment all platforms with squasher use a fixed cd2x | 
|---|
| 2424 | * divider. | 
|---|
| 2425 | */ | 
|---|
| 2426 | if (!HAS_CDCLK_SQUASH(display)) | 
|---|
| 2427 | return false; | 
|---|
| 2428 |  | 
|---|
| 2429 | return a->cdclk != b->cdclk && | 
|---|
| 2430 | a->vco != 0 && | 
|---|
| 2431 | a->vco == b->vco && | 
|---|
| 2432 | a->ref == b->ref; | 
|---|
| 2433 | } | 
|---|
| 2434 |  | 
|---|
| 2435 | /** | 
|---|
| 2436 | * intel_cdclk_clock_changed - Check whether the clock changed | 
|---|
| 2437 | * @a: first CDCLK configuration | 
|---|
| 2438 | * @b: second CDCLK configuration | 
|---|
| 2439 | * | 
|---|
| 2440 | * Returns: | 
|---|
| 2441 | * True if CDCLK changed in a way that requires re-programming and | 
|---|
| 2442 | * False otherwise. | 
|---|
| 2443 | */ | 
|---|
| 2444 | bool intel_cdclk_clock_changed(const struct intel_cdclk_config *a, | 
|---|
| 2445 | const struct intel_cdclk_config *b) | 
|---|
| 2446 | { | 
|---|
| 2447 | return a->cdclk != b->cdclk || | 
|---|
| 2448 | a->vco != b->vco || | 
|---|
| 2449 | a->ref != b->ref; | 
|---|
| 2450 | } | 
|---|
| 2451 |  | 
|---|
| 2452 | /** | 
|---|
| 2453 | * intel_cdclk_can_cd2x_update - Determine if changing between the two CDCLK | 
|---|
| 2454 | *                               configurations requires only a cd2x divider update | 
|---|
| 2455 | * @display: display instance | 
|---|
| 2456 | * @a: first CDCLK configuration | 
|---|
| 2457 | * @b: second CDCLK configuration | 
|---|
| 2458 | * | 
|---|
| 2459 | * Returns: | 
|---|
| 2460 | * True if changing between the two CDCLK configurations | 
|---|
| 2461 | * can be done with just a cd2x divider update, false if not. | 
|---|
| 2462 | */ | 
|---|
| 2463 | static bool intel_cdclk_can_cd2x_update(struct intel_display *display, | 
|---|
| 2464 | const struct intel_cdclk_config *a, | 
|---|
| 2465 | const struct intel_cdclk_config *b) | 
|---|
| 2466 | { | 
|---|
| 2467 | /* Older hw doesn't have the capability */ | 
|---|
| 2468 | if (DISPLAY_VER(display) < 10 && !display->platform.broxton) | 
|---|
| 2469 | return false; | 
|---|
| 2470 |  | 
|---|
| 2471 | /* | 
|---|
| 2472 | * FIXME should store a bit more state in intel_cdclk_config | 
|---|
| 2473 | * to differentiate squasher vs. cd2x divider properly. For | 
|---|
| 2474 | * the moment all platforms with squasher use a fixed cd2x | 
|---|
| 2475 | * divider. | 
|---|
| 2476 | */ | 
|---|
| 2477 | if (HAS_CDCLK_SQUASH(display)) | 
|---|
| 2478 | return false; | 
|---|
| 2479 |  | 
|---|
| 2480 | return a->cdclk != b->cdclk && | 
|---|
| 2481 | a->vco != 0 && | 
|---|
| 2482 | a->vco == b->vco && | 
|---|
| 2483 | a->ref == b->ref; | 
|---|
| 2484 | } | 
|---|
| 2485 |  | 
|---|
| 2486 | /** | 
|---|
| 2487 | * intel_cdclk_changed - Determine if two CDCLK configurations are different | 
|---|
| 2488 | * @a: first CDCLK configuration | 
|---|
| 2489 | * @b: second CDCLK configuration | 
|---|
| 2490 | * | 
|---|
| 2491 | * Returns: | 
|---|
| 2492 | * True if the CDCLK configurations don't match, false if they do. | 
|---|
| 2493 | */ | 
|---|
| 2494 | static bool intel_cdclk_changed(const struct intel_cdclk_config *a, | 
|---|
| 2495 | const struct intel_cdclk_config *b) | 
|---|
| 2496 | { | 
|---|
| 2497 | return intel_cdclk_clock_changed(a, b) || | 
|---|
| 2498 | a->voltage_level != b->voltage_level; | 
|---|
| 2499 | } | 
|---|
| 2500 |  | 
|---|
| 2501 | void intel_cdclk_dump_config(struct intel_display *display, | 
|---|
| 2502 | const struct intel_cdclk_config *cdclk_config, | 
|---|
| 2503 | const char *context) | 
|---|
| 2504 | { | 
|---|
| 2505 | drm_dbg_kms(display->drm, "%s %d kHz, VCO %d kHz, ref %d kHz, bypass %d kHz, voltage level %d\n", | 
|---|
| 2506 | context, cdclk_config->cdclk, cdclk_config->vco, | 
|---|
| 2507 | cdclk_config->ref, cdclk_config->bypass, | 
|---|
| 2508 | cdclk_config->voltage_level); | 
|---|
| 2509 | } | 
|---|
| 2510 |  | 
|---|
| 2511 | static void intel_pcode_notify(struct intel_display *display, | 
|---|
| 2512 | u8 voltage_level, | 
|---|
| 2513 | u8 active_pipe_count, | 
|---|
| 2514 | u16 cdclk, | 
|---|
| 2515 | bool cdclk_update_valid, | 
|---|
| 2516 | bool pipe_count_update_valid) | 
|---|
| 2517 | { | 
|---|
| 2518 | int ret; | 
|---|
| 2519 | u32 update_mask = 0; | 
|---|
| 2520 |  | 
|---|
| 2521 | if (!display->platform.dg2) | 
|---|
| 2522 | return; | 
|---|
| 2523 |  | 
|---|
| 2524 | update_mask = DISPLAY_TO_PCODE_UPDATE_MASK(cdclk, active_pipe_count, voltage_level); | 
|---|
| 2525 |  | 
|---|
| 2526 | if (cdclk_update_valid) | 
|---|
| 2527 | update_mask |= DISPLAY_TO_PCODE_CDCLK_VALID; | 
|---|
| 2528 |  | 
|---|
| 2529 | if (pipe_count_update_valid) | 
|---|
| 2530 | update_mask |= DISPLAY_TO_PCODE_PIPE_COUNT_VALID; | 
|---|
| 2531 |  | 
|---|
| 2532 | ret = intel_pcode_request(drm: display->drm, SKL_PCODE_CDCLK_CONTROL, | 
|---|
| 2533 | SKL_CDCLK_PREPARE_FOR_CHANGE | | 
|---|
| 2534 | update_mask, | 
|---|
| 2535 | SKL_CDCLK_READY_FOR_CHANGE, | 
|---|
| 2536 | SKL_CDCLK_READY_FOR_CHANGE, timeout_base_ms: 3); | 
|---|
| 2537 | if (ret) | 
|---|
| 2538 | drm_err(display->drm, | 
|---|
| 2539 | "Failed to inform PCU about display config (err %d)\n", | 
|---|
| 2540 | ret); | 
|---|
| 2541 | } | 
|---|
| 2542 |  | 
|---|
| 2543 | static void intel_set_cdclk(struct intel_display *display, | 
|---|
| 2544 | const struct intel_cdclk_config *cdclk_config, | 
|---|
| 2545 | enum pipe pipe, const char *context) | 
|---|
| 2546 | { | 
|---|
| 2547 | struct intel_encoder *encoder; | 
|---|
| 2548 |  | 
|---|
| 2549 | if (!intel_cdclk_changed(a: &display->cdclk.hw, b: cdclk_config)) | 
|---|
| 2550 | return; | 
|---|
| 2551 |  | 
|---|
| 2552 | if (drm_WARN_ON_ONCE(display->drm, !display->funcs.cdclk->set_cdclk)) | 
|---|
| 2553 | return; | 
|---|
| 2554 |  | 
|---|
| 2555 | intel_cdclk_dump_config(display, cdclk_config, context); | 
|---|
| 2556 |  | 
|---|
| 2557 | for_each_intel_encoder_with_psr(display->drm, encoder) { | 
|---|
| 2558 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); | 
|---|
| 2559 |  | 
|---|
| 2560 | intel_psr_pause(intel_dp); | 
|---|
| 2561 | } | 
|---|
| 2562 |  | 
|---|
| 2563 | intel_audio_cdclk_change_pre(display); | 
|---|
| 2564 |  | 
|---|
| 2565 | /* | 
|---|
| 2566 | * Lock aux/gmbus while we change cdclk in case those | 
|---|
| 2567 | * functions use cdclk. Not all platforms/ports do, | 
|---|
| 2568 | * but we'll lock them all for simplicity. | 
|---|
| 2569 | */ | 
|---|
| 2570 | mutex_lock(lock: &display->gmbus.mutex); | 
|---|
| 2571 | for_each_intel_dp(display->drm, encoder) { | 
|---|
| 2572 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); | 
|---|
| 2573 |  | 
|---|
| 2574 | mutex_lock_nest_lock(&intel_dp->aux.hw_mutex, | 
|---|
| 2575 | &display->gmbus.mutex); | 
|---|
| 2576 | } | 
|---|
| 2577 |  | 
|---|
| 2578 | intel_cdclk_set_cdclk(display, cdclk_config, pipe); | 
|---|
| 2579 |  | 
|---|
| 2580 | for_each_intel_dp(display->drm, encoder) { | 
|---|
| 2581 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); | 
|---|
| 2582 |  | 
|---|
| 2583 | mutex_unlock(lock: &intel_dp->aux.hw_mutex); | 
|---|
| 2584 | } | 
|---|
| 2585 | mutex_unlock(lock: &display->gmbus.mutex); | 
|---|
| 2586 |  | 
|---|
| 2587 | for_each_intel_encoder_with_psr(display->drm, encoder) { | 
|---|
| 2588 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); | 
|---|
| 2589 |  | 
|---|
| 2590 | intel_psr_resume(intel_dp); | 
|---|
| 2591 | } | 
|---|
| 2592 |  | 
|---|
| 2593 | intel_audio_cdclk_change_post(display); | 
|---|
| 2594 |  | 
|---|
| 2595 | if (drm_WARN(display->drm, | 
|---|
| 2596 | intel_cdclk_changed(&display->cdclk.hw, cdclk_config), | 
|---|
| 2597 | "cdclk state doesn't match!\n")) { | 
|---|
| 2598 | intel_cdclk_dump_config(display, cdclk_config: &display->cdclk.hw, context: "[hw state]"); | 
|---|
| 2599 | intel_cdclk_dump_config(display, cdclk_config, context: "[sw state]"); | 
|---|
| 2600 | } | 
|---|
| 2601 | } | 
|---|
| 2602 |  | 
|---|
| 2603 | static void intel_cdclk_pcode_pre_notify(struct intel_atomic_state *state) | 
|---|
| 2604 | { | 
|---|
| 2605 | struct intel_display *display = to_intel_display(state); | 
|---|
| 2606 | const struct intel_cdclk_state *old_cdclk_state = | 
|---|
| 2607 | intel_atomic_get_old_cdclk_state(state); | 
|---|
| 2608 | const struct intel_cdclk_state *new_cdclk_state = | 
|---|
| 2609 | intel_atomic_get_new_cdclk_state(state); | 
|---|
| 2610 | unsigned int cdclk = 0; u8 voltage_level, num_active_pipes = 0; | 
|---|
| 2611 | bool change_cdclk, update_pipe_count; | 
|---|
| 2612 |  | 
|---|
| 2613 | if (!intel_cdclk_changed(a: &old_cdclk_state->actual, | 
|---|
| 2614 | b: &new_cdclk_state->actual) && | 
|---|
| 2615 | new_cdclk_state->active_pipes == | 
|---|
| 2616 | old_cdclk_state->active_pipes) | 
|---|
| 2617 | return; | 
|---|
| 2618 |  | 
|---|
| 2619 | /* According to "Sequence Before Frequency Change", voltage level set to 0x3 */ | 
|---|
| 2620 | voltage_level = DISPLAY_TO_PCODE_VOLTAGE_MAX; | 
|---|
| 2621 |  | 
|---|
| 2622 | change_cdclk = new_cdclk_state->actual.cdclk != old_cdclk_state->actual.cdclk; | 
|---|
| 2623 | update_pipe_count = hweight8(new_cdclk_state->active_pipes) > | 
|---|
| 2624 | hweight8(old_cdclk_state->active_pipes); | 
|---|
| 2625 |  | 
|---|
| 2626 | /* | 
|---|
| 2627 | * According to "Sequence Before Frequency Change", | 
|---|
| 2628 | * if CDCLK is increasing, set bits 25:16 to upcoming CDCLK, | 
|---|
| 2629 | * if CDCLK is decreasing or not changing, set bits 25:16 to current CDCLK, | 
|---|
| 2630 | * which basically means we choose the maximum of old and new CDCLK, if we know both | 
|---|
| 2631 | */ | 
|---|
| 2632 | if (change_cdclk) | 
|---|
| 2633 | cdclk = max(new_cdclk_state->actual.cdclk, old_cdclk_state->actual.cdclk); | 
|---|
| 2634 |  | 
|---|
| 2635 | /* | 
|---|
| 2636 | * According to "Sequence For Pipe Count Change", | 
|---|
| 2637 | * if pipe count is increasing, set bits 25:16 to upcoming pipe count | 
|---|
| 2638 | * (power well is enabled) | 
|---|
| 2639 | * no action if it is decreasing, before the change | 
|---|
| 2640 | */ | 
|---|
| 2641 | if (update_pipe_count) | 
|---|
| 2642 | num_active_pipes = hweight8(new_cdclk_state->active_pipes); | 
|---|
| 2643 |  | 
|---|
| 2644 | intel_pcode_notify(display, voltage_level, active_pipe_count: num_active_pipes, cdclk, | 
|---|
| 2645 | cdclk_update_valid: change_cdclk, pipe_count_update_valid: update_pipe_count); | 
|---|
| 2646 | } | 
|---|
| 2647 |  | 
|---|
| 2648 | static void intel_cdclk_pcode_post_notify(struct intel_atomic_state *state) | 
|---|
| 2649 | { | 
|---|
| 2650 | struct intel_display *display = to_intel_display(state); | 
|---|
| 2651 | const struct intel_cdclk_state *new_cdclk_state = | 
|---|
| 2652 | intel_atomic_get_new_cdclk_state(state); | 
|---|
| 2653 | const struct intel_cdclk_state *old_cdclk_state = | 
|---|
| 2654 | intel_atomic_get_old_cdclk_state(state); | 
|---|
| 2655 | unsigned int cdclk = 0; u8 voltage_level, num_active_pipes = 0; | 
|---|
| 2656 | bool update_cdclk, update_pipe_count; | 
|---|
| 2657 |  | 
|---|
| 2658 | /* According to "Sequence After Frequency Change", set voltage to used level */ | 
|---|
| 2659 | voltage_level = new_cdclk_state->actual.voltage_level; | 
|---|
| 2660 |  | 
|---|
| 2661 | update_cdclk = new_cdclk_state->actual.cdclk != old_cdclk_state->actual.cdclk; | 
|---|
| 2662 | update_pipe_count = hweight8(new_cdclk_state->active_pipes) < | 
|---|
| 2663 | hweight8(old_cdclk_state->active_pipes); | 
|---|
| 2664 |  | 
|---|
| 2665 | /* | 
|---|
| 2666 | * According to "Sequence After Frequency Change", | 
|---|
| 2667 | * set bits 25:16 to current CDCLK | 
|---|
| 2668 | */ | 
|---|
| 2669 | if (update_cdclk) | 
|---|
| 2670 | cdclk = new_cdclk_state->actual.cdclk; | 
|---|
| 2671 |  | 
|---|
| 2672 | /* | 
|---|
| 2673 | * According to "Sequence For Pipe Count Change", | 
|---|
| 2674 | * if pipe count is decreasing, set bits 25:16 to current pipe count, | 
|---|
| 2675 | * after the change(power well is disabled) | 
|---|
| 2676 | * no action if it is increasing, after the change | 
|---|
| 2677 | */ | 
|---|
| 2678 | if (update_pipe_count) | 
|---|
| 2679 | num_active_pipes = hweight8(new_cdclk_state->active_pipes); | 
|---|
| 2680 |  | 
|---|
| 2681 | intel_pcode_notify(display, voltage_level, active_pipe_count: num_active_pipes, cdclk, | 
|---|
| 2682 | cdclk_update_valid: update_cdclk, pipe_count_update_valid: update_pipe_count); | 
|---|
| 2683 | } | 
|---|
| 2684 |  | 
|---|
| 2685 | bool intel_cdclk_is_decreasing_later(struct intel_atomic_state *state) | 
|---|
| 2686 | { | 
|---|
| 2687 | const struct intel_cdclk_state *old_cdclk_state = | 
|---|
| 2688 | intel_atomic_get_old_cdclk_state(state); | 
|---|
| 2689 | const struct intel_cdclk_state *new_cdclk_state = | 
|---|
| 2690 | intel_atomic_get_new_cdclk_state(state); | 
|---|
| 2691 |  | 
|---|
| 2692 | return new_cdclk_state && !new_cdclk_state->disable_pipes && | 
|---|
| 2693 | new_cdclk_state->actual.cdclk < old_cdclk_state->actual.cdclk; | 
|---|
| 2694 | } | 
|---|
| 2695 |  | 
|---|
| 2696 | /** | 
|---|
| 2697 | * intel_set_cdclk_pre_plane_update - Push the CDCLK state to the hardware | 
|---|
| 2698 | * @state: intel atomic state | 
|---|
| 2699 | * | 
|---|
| 2700 | * Program the hardware before updating the HW plane state based on the | 
|---|
| 2701 | * new CDCLK state, if necessary. | 
|---|
| 2702 | */ | 
|---|
| 2703 | void | 
|---|
| 2704 | intel_set_cdclk_pre_plane_update(struct intel_atomic_state *state) | 
|---|
| 2705 | { | 
|---|
| 2706 | struct intel_display *display = to_intel_display(state); | 
|---|
| 2707 | const struct intel_cdclk_state *old_cdclk_state = | 
|---|
| 2708 | intel_atomic_get_old_cdclk_state(state); | 
|---|
| 2709 | const struct intel_cdclk_state *new_cdclk_state = | 
|---|
| 2710 | intel_atomic_get_new_cdclk_state(state); | 
|---|
| 2711 | struct intel_cdclk_config cdclk_config; | 
|---|
| 2712 | enum pipe pipe; | 
|---|
| 2713 |  | 
|---|
| 2714 | if (!intel_cdclk_changed(a: &old_cdclk_state->actual, | 
|---|
| 2715 | b: &new_cdclk_state->actual)) | 
|---|
| 2716 | return; | 
|---|
| 2717 |  | 
|---|
| 2718 | if (display->platform.dg2) | 
|---|
| 2719 | intel_cdclk_pcode_pre_notify(state); | 
|---|
| 2720 |  | 
|---|
| 2721 | if (new_cdclk_state->disable_pipes) { | 
|---|
| 2722 | cdclk_config = new_cdclk_state->actual; | 
|---|
| 2723 | pipe = INVALID_PIPE; | 
|---|
| 2724 | } else { | 
|---|
| 2725 | if (new_cdclk_state->actual.cdclk >= old_cdclk_state->actual.cdclk) { | 
|---|
| 2726 | cdclk_config = new_cdclk_state->actual; | 
|---|
| 2727 | pipe = new_cdclk_state->pipe; | 
|---|
| 2728 | } else { | 
|---|
| 2729 | cdclk_config = old_cdclk_state->actual; | 
|---|
| 2730 | pipe = INVALID_PIPE; | 
|---|
| 2731 | } | 
|---|
| 2732 |  | 
|---|
| 2733 | cdclk_config.voltage_level = max(new_cdclk_state->actual.voltage_level, | 
|---|
| 2734 | old_cdclk_state->actual.voltage_level); | 
|---|
| 2735 | } | 
|---|
| 2736 |  | 
|---|
| 2737 | /* | 
|---|
| 2738 | * mbus joining will be changed later by | 
|---|
| 2739 | * intel_dbuf_mbus_{pre,post}_ddb_update() | 
|---|
| 2740 | */ | 
|---|
| 2741 | cdclk_config.joined_mbus = old_cdclk_state->actual.joined_mbus; | 
|---|
| 2742 |  | 
|---|
| 2743 | drm_WARN_ON(display->drm, !new_cdclk_state->base.changed); | 
|---|
| 2744 |  | 
|---|
| 2745 | intel_set_cdclk(display, cdclk_config: &cdclk_config, pipe, | 
|---|
| 2746 | context: "Pre changing CDCLK to"); | 
|---|
| 2747 | } | 
|---|
| 2748 |  | 
|---|
| 2749 | /** | 
|---|
| 2750 | * intel_set_cdclk_post_plane_update - Push the CDCLK state to the hardware | 
|---|
| 2751 | * @state: intel atomic state | 
|---|
| 2752 | * | 
|---|
| 2753 | * Program the hardware after updating the HW plane state based on the | 
|---|
| 2754 | * new CDCLK state, if necessary. | 
|---|
| 2755 | */ | 
|---|
| 2756 | void | 
|---|
| 2757 | intel_set_cdclk_post_plane_update(struct intel_atomic_state *state) | 
|---|
| 2758 | { | 
|---|
| 2759 | struct intel_display *display = to_intel_display(state); | 
|---|
| 2760 | const struct intel_cdclk_state *old_cdclk_state = | 
|---|
| 2761 | intel_atomic_get_old_cdclk_state(state); | 
|---|
| 2762 | const struct intel_cdclk_state *new_cdclk_state = | 
|---|
| 2763 | intel_atomic_get_new_cdclk_state(state); | 
|---|
| 2764 | enum pipe pipe; | 
|---|
| 2765 |  | 
|---|
| 2766 | if (!intel_cdclk_changed(a: &old_cdclk_state->actual, | 
|---|
| 2767 | b: &new_cdclk_state->actual)) | 
|---|
| 2768 | return; | 
|---|
| 2769 |  | 
|---|
| 2770 | if (display->platform.dg2) | 
|---|
| 2771 | intel_cdclk_pcode_post_notify(state); | 
|---|
| 2772 |  | 
|---|
| 2773 | if (!new_cdclk_state->disable_pipes && | 
|---|
| 2774 | new_cdclk_state->actual.cdclk < old_cdclk_state->actual.cdclk) | 
|---|
| 2775 | pipe = new_cdclk_state->pipe; | 
|---|
| 2776 | else | 
|---|
| 2777 | pipe = INVALID_PIPE; | 
|---|
| 2778 |  | 
|---|
| 2779 | drm_WARN_ON(display->drm, !new_cdclk_state->base.changed); | 
|---|
| 2780 |  | 
|---|
| 2781 | intel_set_cdclk(display, cdclk_config: &new_cdclk_state->actual, pipe, | 
|---|
| 2782 | context: "Post changing CDCLK to"); | 
|---|
| 2783 | } | 
|---|
| 2784 |  | 
|---|
| 2785 | /* pixels per CDCLK */ | 
|---|
| 2786 | static int intel_cdclk_ppc(struct intel_display *display, bool double_wide) | 
|---|
| 2787 | { | 
|---|
| 2788 | return DISPLAY_VER(display) >= 10 || double_wide ? 2 : 1; | 
|---|
| 2789 | } | 
|---|
| 2790 |  | 
|---|
| 2791 | /* max pixel rate as % of CDCLK (not accounting for PPC) */ | 
|---|
| 2792 | static int intel_cdclk_guardband(struct intel_display *display) | 
|---|
| 2793 | { | 
|---|
| 2794 | if (DISPLAY_VER(display) >= 9 || | 
|---|
| 2795 | display->platform.broadwell || display->platform.haswell) | 
|---|
| 2796 | return 100; | 
|---|
| 2797 | else if (display->platform.cherryview) | 
|---|
| 2798 | return 95; | 
|---|
| 2799 | else | 
|---|
| 2800 | return 90; | 
|---|
| 2801 | } | 
|---|
| 2802 |  | 
|---|
| 2803 | static int intel_pixel_rate_to_cdclk(const struct intel_crtc_state *crtc_state) | 
|---|
| 2804 | { | 
|---|
| 2805 | struct intel_display *display = to_intel_display(crtc_state); | 
|---|
| 2806 | int ppc = intel_cdclk_ppc(display, double_wide: crtc_state->double_wide); | 
|---|
| 2807 | int guardband = intel_cdclk_guardband(display); | 
|---|
| 2808 | int pixel_rate = crtc_state->pixel_rate; | 
|---|
| 2809 |  | 
|---|
| 2810 | return DIV_ROUND_UP(pixel_rate * 100, guardband * ppc); | 
|---|
| 2811 | } | 
|---|
| 2812 |  | 
|---|
| 2813 | static int intel_planes_min_cdclk(const struct intel_crtc_state *crtc_state) | 
|---|
| 2814 | { | 
|---|
| 2815 | struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); | 
|---|
| 2816 | struct intel_display *display = to_intel_display(crtc); | 
|---|
| 2817 | struct intel_plane *plane; | 
|---|
| 2818 | int min_cdclk = 0; | 
|---|
| 2819 |  | 
|---|
| 2820 | for_each_intel_plane_on_crtc(display->drm, crtc, plane) | 
|---|
| 2821 | min_cdclk = max(min_cdclk, crtc_state->min_cdclk[plane->id]); | 
|---|
| 2822 |  | 
|---|
| 2823 | return min_cdclk; | 
|---|
| 2824 | } | 
|---|
| 2825 |  | 
|---|
| 2826 | static int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state) | 
|---|
| 2827 | { | 
|---|
| 2828 | int min_cdclk; | 
|---|
| 2829 |  | 
|---|
| 2830 | if (!crtc_state->hw.enable) | 
|---|
| 2831 | return 0; | 
|---|
| 2832 |  | 
|---|
| 2833 | min_cdclk = intel_pixel_rate_to_cdclk(crtc_state); | 
|---|
| 2834 | min_cdclk = max(min_cdclk, hsw_ips_min_cdclk(crtc_state)); | 
|---|
| 2835 | min_cdclk = max(min_cdclk, intel_audio_min_cdclk(crtc_state)); | 
|---|
| 2836 | min_cdclk = max(min_cdclk, vlv_dsi_min_cdclk(crtc_state)); | 
|---|
| 2837 | min_cdclk = max(min_cdclk, intel_planes_min_cdclk(crtc_state)); | 
|---|
| 2838 | min_cdclk = max(min_cdclk, intel_vdsc_min_cdclk(crtc_state)); | 
|---|
| 2839 |  | 
|---|
| 2840 | return min_cdclk; | 
|---|
| 2841 | } | 
|---|
| 2842 |  | 
|---|
| 2843 | static int intel_compute_min_cdclk(struct intel_atomic_state *state) | 
|---|
| 2844 | { | 
|---|
| 2845 | struct intel_display *display = to_intel_display(state); | 
|---|
| 2846 | struct intel_cdclk_state *cdclk_state = | 
|---|
| 2847 | intel_atomic_get_new_cdclk_state(state); | 
|---|
| 2848 | const struct intel_bw_state *bw_state; | 
|---|
| 2849 | struct intel_crtc *crtc; | 
|---|
| 2850 | struct intel_crtc_state *crtc_state; | 
|---|
| 2851 | int min_cdclk, i; | 
|---|
| 2852 | enum pipe pipe; | 
|---|
| 2853 |  | 
|---|
| 2854 | for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) { | 
|---|
| 2855 | int ret; | 
|---|
| 2856 |  | 
|---|
| 2857 | min_cdclk = intel_crtc_compute_min_cdclk(crtc_state); | 
|---|
| 2858 | if (min_cdclk < 0) | 
|---|
| 2859 | return min_cdclk; | 
|---|
| 2860 |  | 
|---|
| 2861 | if (cdclk_state->min_cdclk[crtc->pipe] == min_cdclk) | 
|---|
| 2862 | continue; | 
|---|
| 2863 |  | 
|---|
| 2864 | cdclk_state->min_cdclk[crtc->pipe] = min_cdclk; | 
|---|
| 2865 |  | 
|---|
| 2866 | ret = intel_atomic_lock_global_state(obj_state: &cdclk_state->base); | 
|---|
| 2867 | if (ret) | 
|---|
| 2868 | return ret; | 
|---|
| 2869 | } | 
|---|
| 2870 |  | 
|---|
| 2871 | bw_state = intel_atomic_get_new_bw_state(state); | 
|---|
| 2872 | if (bw_state) { | 
|---|
| 2873 | min_cdclk = intel_bw_min_cdclk(display, bw_state); | 
|---|
| 2874 |  | 
|---|
| 2875 | if (cdclk_state->bw_min_cdclk != min_cdclk) { | 
|---|
| 2876 | int ret; | 
|---|
| 2877 |  | 
|---|
| 2878 | cdclk_state->bw_min_cdclk = min_cdclk; | 
|---|
| 2879 |  | 
|---|
| 2880 | ret = intel_atomic_lock_global_state(obj_state: &cdclk_state->base); | 
|---|
| 2881 | if (ret) | 
|---|
| 2882 | return ret; | 
|---|
| 2883 | } | 
|---|
| 2884 | } | 
|---|
| 2885 |  | 
|---|
| 2886 | min_cdclk = max(cdclk_state->force_min_cdclk, | 
|---|
| 2887 | cdclk_state->bw_min_cdclk); | 
|---|
| 2888 | for_each_pipe(display, pipe) | 
|---|
| 2889 | min_cdclk = max(min_cdclk, cdclk_state->min_cdclk[pipe]); | 
|---|
| 2890 |  | 
|---|
| 2891 | /* | 
|---|
| 2892 | * Avoid glk_force_audio_cdclk() causing excessive screen | 
|---|
| 2893 | * blinking when multiple pipes are active by making sure | 
|---|
| 2894 | * CDCLK frequency is always high enough for audio. With a | 
|---|
| 2895 | * single active pipe we can always change CDCLK frequency | 
|---|
| 2896 | * by changing the cd2x divider (see glk_cdclk_table[]) and | 
|---|
| 2897 | * thus a full modeset won't be needed then. | 
|---|
| 2898 | */ | 
|---|
| 2899 | if (display->platform.geminilake && cdclk_state->active_pipes && | 
|---|
| 2900 | !is_power_of_2(n: cdclk_state->active_pipes)) | 
|---|
| 2901 | min_cdclk = max(min_cdclk, 2 * 96000); | 
|---|
| 2902 |  | 
|---|
| 2903 | if (min_cdclk > display->cdclk.max_cdclk_freq) { | 
|---|
| 2904 | drm_dbg_kms(display->drm, | 
|---|
| 2905 | "required cdclk (%d kHz) exceeds max (%d kHz)\n", | 
|---|
| 2906 | min_cdclk, display->cdclk.max_cdclk_freq); | 
|---|
| 2907 | return -EINVAL; | 
|---|
| 2908 | } | 
|---|
| 2909 |  | 
|---|
| 2910 | return min_cdclk; | 
|---|
| 2911 | } | 
|---|
| 2912 |  | 
|---|
| 2913 | /* | 
|---|
| 2914 | * Account for port clock min voltage level requirements. | 
|---|
| 2915 | * This only really does something on DISPLA_VER >= 11 but can be | 
|---|
| 2916 | * called on earlier platforms as well. | 
|---|
| 2917 | * | 
|---|
| 2918 | * Note that this functions assumes that 0 is | 
|---|
| 2919 | * the lowest voltage value, and higher values | 
|---|
| 2920 | * correspond to increasingly higher voltages. | 
|---|
| 2921 | * | 
|---|
| 2922 | * Should that relationship no longer hold on | 
|---|
| 2923 | * future platforms this code will need to be | 
|---|
| 2924 | * adjusted. | 
|---|
| 2925 | */ | 
|---|
| 2926 | static int bxt_compute_min_voltage_level(struct intel_atomic_state *state) | 
|---|
| 2927 | { | 
|---|
| 2928 | struct intel_display *display = to_intel_display(state); | 
|---|
| 2929 | struct intel_cdclk_state *cdclk_state = | 
|---|
| 2930 | intel_atomic_get_new_cdclk_state(state); | 
|---|
| 2931 | struct intel_crtc *crtc; | 
|---|
| 2932 | struct intel_crtc_state *crtc_state; | 
|---|
| 2933 | u8 min_voltage_level; | 
|---|
| 2934 | int i; | 
|---|
| 2935 | enum pipe pipe; | 
|---|
| 2936 |  | 
|---|
| 2937 | for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) { | 
|---|
| 2938 | int ret; | 
|---|
| 2939 |  | 
|---|
| 2940 | if (crtc_state->hw.enable) | 
|---|
| 2941 | min_voltage_level = crtc_state->min_voltage_level; | 
|---|
| 2942 | else | 
|---|
| 2943 | min_voltage_level = 0; | 
|---|
| 2944 |  | 
|---|
| 2945 | if (cdclk_state->min_voltage_level[crtc->pipe] == min_voltage_level) | 
|---|
| 2946 | continue; | 
|---|
| 2947 |  | 
|---|
| 2948 | cdclk_state->min_voltage_level[crtc->pipe] = min_voltage_level; | 
|---|
| 2949 |  | 
|---|
| 2950 | ret = intel_atomic_lock_global_state(obj_state: &cdclk_state->base); | 
|---|
| 2951 | if (ret) | 
|---|
| 2952 | return ret; | 
|---|
| 2953 | } | 
|---|
| 2954 |  | 
|---|
| 2955 | min_voltage_level = 0; | 
|---|
| 2956 | for_each_pipe(display, pipe) | 
|---|
| 2957 | min_voltage_level = max(min_voltage_level, | 
|---|
| 2958 | cdclk_state->min_voltage_level[pipe]); | 
|---|
| 2959 |  | 
|---|
| 2960 | return min_voltage_level; | 
|---|
| 2961 | } | 
|---|
| 2962 |  | 
|---|
| 2963 | static int vlv_modeset_calc_cdclk(struct intel_atomic_state *state) | 
|---|
| 2964 | { | 
|---|
| 2965 | struct intel_display *display = to_intel_display(state); | 
|---|
| 2966 | struct intel_cdclk_state *cdclk_state = | 
|---|
| 2967 | intel_atomic_get_new_cdclk_state(state); | 
|---|
| 2968 | int min_cdclk, cdclk; | 
|---|
| 2969 |  | 
|---|
| 2970 | min_cdclk = intel_compute_min_cdclk(state); | 
|---|
| 2971 | if (min_cdclk < 0) | 
|---|
| 2972 | return min_cdclk; | 
|---|
| 2973 |  | 
|---|
| 2974 | cdclk = vlv_calc_cdclk(display, min_cdclk); | 
|---|
| 2975 |  | 
|---|
| 2976 | cdclk_state->logical.cdclk = cdclk; | 
|---|
| 2977 | cdclk_state->logical.voltage_level = | 
|---|
| 2978 | vlv_calc_voltage_level(display, cdclk); | 
|---|
| 2979 |  | 
|---|
| 2980 | if (!cdclk_state->active_pipes) { | 
|---|
| 2981 | cdclk = vlv_calc_cdclk(display, min_cdclk: cdclk_state->force_min_cdclk); | 
|---|
| 2982 |  | 
|---|
| 2983 | cdclk_state->actual.cdclk = cdclk; | 
|---|
| 2984 | cdclk_state->actual.voltage_level = | 
|---|
| 2985 | vlv_calc_voltage_level(display, cdclk); | 
|---|
| 2986 | } else { | 
|---|
| 2987 | cdclk_state->actual = cdclk_state->logical; | 
|---|
| 2988 | } | 
|---|
| 2989 |  | 
|---|
| 2990 | return 0; | 
|---|
| 2991 | } | 
|---|
| 2992 |  | 
|---|
| 2993 | static int bdw_modeset_calc_cdclk(struct intel_atomic_state *state) | 
|---|
| 2994 | { | 
|---|
| 2995 | struct intel_cdclk_state *cdclk_state = | 
|---|
| 2996 | intel_atomic_get_new_cdclk_state(state); | 
|---|
| 2997 | int min_cdclk, cdclk; | 
|---|
| 2998 |  | 
|---|
| 2999 | min_cdclk = intel_compute_min_cdclk(state); | 
|---|
| 3000 | if (min_cdclk < 0) | 
|---|
| 3001 | return min_cdclk; | 
|---|
| 3002 |  | 
|---|
| 3003 | cdclk = bdw_calc_cdclk(min_cdclk); | 
|---|
| 3004 |  | 
|---|
| 3005 | cdclk_state->logical.cdclk = cdclk; | 
|---|
| 3006 | cdclk_state->logical.voltage_level = | 
|---|
| 3007 | bdw_calc_voltage_level(cdclk); | 
|---|
| 3008 |  | 
|---|
| 3009 | if (!cdclk_state->active_pipes) { | 
|---|
| 3010 | cdclk = bdw_calc_cdclk(min_cdclk: cdclk_state->force_min_cdclk); | 
|---|
| 3011 |  | 
|---|
| 3012 | cdclk_state->actual.cdclk = cdclk; | 
|---|
| 3013 | cdclk_state->actual.voltage_level = | 
|---|
| 3014 | bdw_calc_voltage_level(cdclk); | 
|---|
| 3015 | } else { | 
|---|
| 3016 | cdclk_state->actual = cdclk_state->logical; | 
|---|
| 3017 | } | 
|---|
| 3018 |  | 
|---|
| 3019 | return 0; | 
|---|
| 3020 | } | 
|---|
| 3021 |  | 
|---|
| 3022 | static int skl_dpll0_vco(struct intel_atomic_state *state) | 
|---|
| 3023 | { | 
|---|
| 3024 | struct intel_display *display = to_intel_display(state); | 
|---|
| 3025 | struct intel_cdclk_state *cdclk_state = | 
|---|
| 3026 | intel_atomic_get_new_cdclk_state(state); | 
|---|
| 3027 | struct intel_crtc *crtc; | 
|---|
| 3028 | struct intel_crtc_state *crtc_state; | 
|---|
| 3029 | int vco, i; | 
|---|
| 3030 |  | 
|---|
| 3031 | vco = cdclk_state->logical.vco; | 
|---|
| 3032 | if (!vco) | 
|---|
| 3033 | vco = display->cdclk.skl_preferred_vco_freq; | 
|---|
| 3034 |  | 
|---|
| 3035 | for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) { | 
|---|
| 3036 | if (!crtc_state->hw.enable) | 
|---|
| 3037 | continue; | 
|---|
| 3038 |  | 
|---|
| 3039 | if (!intel_crtc_has_type(crtc_state, type: INTEL_OUTPUT_EDP)) | 
|---|
| 3040 | continue; | 
|---|
| 3041 |  | 
|---|
| 3042 | /* | 
|---|
| 3043 | * DPLL0 VCO may need to be adjusted to get the correct | 
|---|
| 3044 | * clock for eDP. This will affect cdclk as well. | 
|---|
| 3045 | */ | 
|---|
| 3046 | switch (crtc_state->port_clock / 2) { | 
|---|
| 3047 | case 108000: | 
|---|
| 3048 | case 216000: | 
|---|
| 3049 | vco = 8640000; | 
|---|
| 3050 | break; | 
|---|
| 3051 | default: | 
|---|
| 3052 | vco = 8100000; | 
|---|
| 3053 | break; | 
|---|
| 3054 | } | 
|---|
| 3055 | } | 
|---|
| 3056 |  | 
|---|
| 3057 | return vco; | 
|---|
| 3058 | } | 
|---|
| 3059 |  | 
|---|
| 3060 | static int skl_modeset_calc_cdclk(struct intel_atomic_state *state) | 
|---|
| 3061 | { | 
|---|
| 3062 | struct intel_cdclk_state *cdclk_state = | 
|---|
| 3063 | intel_atomic_get_new_cdclk_state(state); | 
|---|
| 3064 | int min_cdclk, cdclk, vco; | 
|---|
| 3065 |  | 
|---|
| 3066 | min_cdclk = intel_compute_min_cdclk(state); | 
|---|
| 3067 | if (min_cdclk < 0) | 
|---|
| 3068 | return min_cdclk; | 
|---|
| 3069 |  | 
|---|
| 3070 | vco = skl_dpll0_vco(state); | 
|---|
| 3071 |  | 
|---|
| 3072 | cdclk = skl_calc_cdclk(min_cdclk, vco); | 
|---|
| 3073 |  | 
|---|
| 3074 | cdclk_state->logical.vco = vco; | 
|---|
| 3075 | cdclk_state->logical.cdclk = cdclk; | 
|---|
| 3076 | cdclk_state->logical.voltage_level = | 
|---|
| 3077 | skl_calc_voltage_level(cdclk); | 
|---|
| 3078 |  | 
|---|
| 3079 | if (!cdclk_state->active_pipes) { | 
|---|
| 3080 | cdclk = skl_calc_cdclk(min_cdclk: cdclk_state->force_min_cdclk, vco); | 
|---|
| 3081 |  | 
|---|
| 3082 | cdclk_state->actual.vco = vco; | 
|---|
| 3083 | cdclk_state->actual.cdclk = cdclk; | 
|---|
| 3084 | cdclk_state->actual.voltage_level = | 
|---|
| 3085 | skl_calc_voltage_level(cdclk); | 
|---|
| 3086 | } else { | 
|---|
| 3087 | cdclk_state->actual = cdclk_state->logical; | 
|---|
| 3088 | } | 
|---|
| 3089 |  | 
|---|
| 3090 | return 0; | 
|---|
| 3091 | } | 
|---|
| 3092 |  | 
|---|
| 3093 | static int bxt_modeset_calc_cdclk(struct intel_atomic_state *state) | 
|---|
| 3094 | { | 
|---|
| 3095 | struct intel_display *display = to_intel_display(state); | 
|---|
| 3096 | struct intel_cdclk_state *cdclk_state = | 
|---|
| 3097 | intel_atomic_get_new_cdclk_state(state); | 
|---|
| 3098 | int min_cdclk, min_voltage_level, cdclk, vco; | 
|---|
| 3099 |  | 
|---|
| 3100 | min_cdclk = intel_compute_min_cdclk(state); | 
|---|
| 3101 | if (min_cdclk < 0) | 
|---|
| 3102 | return min_cdclk; | 
|---|
| 3103 |  | 
|---|
| 3104 | min_voltage_level = bxt_compute_min_voltage_level(state); | 
|---|
| 3105 | if (min_voltage_level < 0) | 
|---|
| 3106 | return min_voltage_level; | 
|---|
| 3107 |  | 
|---|
| 3108 | cdclk = bxt_calc_cdclk(display, min_cdclk); | 
|---|
| 3109 | vco = bxt_calc_cdclk_pll_vco(display, cdclk); | 
|---|
| 3110 |  | 
|---|
| 3111 | cdclk_state->logical.vco = vco; | 
|---|
| 3112 | cdclk_state->logical.cdclk = cdclk; | 
|---|
| 3113 | cdclk_state->logical.voltage_level = | 
|---|
| 3114 | max_t(int, min_voltage_level, | 
|---|
| 3115 | intel_cdclk_calc_voltage_level(display, cdclk)); | 
|---|
| 3116 |  | 
|---|
| 3117 | if (!cdclk_state->active_pipes) { | 
|---|
| 3118 | cdclk = bxt_calc_cdclk(display, min_cdclk: cdclk_state->force_min_cdclk); | 
|---|
| 3119 | vco = bxt_calc_cdclk_pll_vco(display, cdclk); | 
|---|
| 3120 |  | 
|---|
| 3121 | cdclk_state->actual.vco = vco; | 
|---|
| 3122 | cdclk_state->actual.cdclk = cdclk; | 
|---|
| 3123 | cdclk_state->actual.voltage_level = | 
|---|
| 3124 | intel_cdclk_calc_voltage_level(display, cdclk); | 
|---|
| 3125 | } else { | 
|---|
| 3126 | cdclk_state->actual = cdclk_state->logical; | 
|---|
| 3127 | } | 
|---|
| 3128 |  | 
|---|
| 3129 | return 0; | 
|---|
| 3130 | } | 
|---|
| 3131 |  | 
|---|
| 3132 | static int fixed_modeset_calc_cdclk(struct intel_atomic_state *state) | 
|---|
| 3133 | { | 
|---|
| 3134 | int min_cdclk; | 
|---|
| 3135 |  | 
|---|
| 3136 | /* | 
|---|
| 3137 | * We can't change the cdclk frequency, but we still want to | 
|---|
| 3138 | * check that the required minimum frequency doesn't exceed | 
|---|
| 3139 | * the actual cdclk frequency. | 
|---|
| 3140 | */ | 
|---|
| 3141 | min_cdclk = intel_compute_min_cdclk(state); | 
|---|
| 3142 | if (min_cdclk < 0) | 
|---|
| 3143 | return min_cdclk; | 
|---|
| 3144 |  | 
|---|
| 3145 | return 0; | 
|---|
| 3146 | } | 
|---|
| 3147 |  | 
|---|
| 3148 | static struct intel_global_state *intel_cdclk_duplicate_state(struct intel_global_obj *obj) | 
|---|
| 3149 | { | 
|---|
| 3150 | struct intel_cdclk_state *cdclk_state; | 
|---|
| 3151 |  | 
|---|
| 3152 | cdclk_state = kmemdup(obj->state, sizeof(*cdclk_state), GFP_KERNEL); | 
|---|
| 3153 | if (!cdclk_state) | 
|---|
| 3154 | return NULL; | 
|---|
| 3155 |  | 
|---|
| 3156 | cdclk_state->pipe = INVALID_PIPE; | 
|---|
| 3157 | cdclk_state->disable_pipes = false; | 
|---|
| 3158 |  | 
|---|
| 3159 | return &cdclk_state->base; | 
|---|
| 3160 | } | 
|---|
| 3161 |  | 
|---|
| 3162 | static void intel_cdclk_destroy_state(struct intel_global_obj *obj, | 
|---|
| 3163 | struct intel_global_state *state) | 
|---|
| 3164 | { | 
|---|
| 3165 | kfree(objp: state); | 
|---|
| 3166 | } | 
|---|
| 3167 |  | 
|---|
| 3168 | static const struct intel_global_state_funcs intel_cdclk_funcs = { | 
|---|
| 3169 | .atomic_duplicate_state = intel_cdclk_duplicate_state, | 
|---|
| 3170 | .atomic_destroy_state = intel_cdclk_destroy_state, | 
|---|
| 3171 | }; | 
|---|
| 3172 |  | 
|---|
| 3173 | struct intel_cdclk_state * | 
|---|
| 3174 | intel_atomic_get_cdclk_state(struct intel_atomic_state *state) | 
|---|
| 3175 | { | 
|---|
| 3176 | struct intel_display *display = to_intel_display(state); | 
|---|
| 3177 | struct intel_global_state *cdclk_state; | 
|---|
| 3178 |  | 
|---|
| 3179 | cdclk_state = intel_atomic_get_global_obj_state(state, obj: &display->cdclk.obj); | 
|---|
| 3180 | if (IS_ERR(ptr: cdclk_state)) | 
|---|
| 3181 | return ERR_CAST(ptr: cdclk_state); | 
|---|
| 3182 |  | 
|---|
| 3183 | return to_intel_cdclk_state(cdclk_state); | 
|---|
| 3184 | } | 
|---|
| 3185 |  | 
|---|
| 3186 | int intel_cdclk_atomic_check(struct intel_atomic_state *state, | 
|---|
| 3187 | bool *need_cdclk_calc) | 
|---|
| 3188 | { | 
|---|
| 3189 | const struct intel_cdclk_state *old_cdclk_state; | 
|---|
| 3190 | const struct intel_cdclk_state *new_cdclk_state; | 
|---|
| 3191 | struct intel_plane_state __maybe_unused *plane_state; | 
|---|
| 3192 | struct intel_plane *plane; | 
|---|
| 3193 | int ret; | 
|---|
| 3194 | int i; | 
|---|
| 3195 |  | 
|---|
| 3196 | /* | 
|---|
| 3197 | * active_planes bitmask has been updated, and potentially affected | 
|---|
| 3198 | * planes are part of the state. We can now compute the minimum cdclk | 
|---|
| 3199 | * for each plane. | 
|---|
| 3200 | */ | 
|---|
| 3201 | for_each_new_intel_plane_in_state(state, plane, plane_state, i) { | 
|---|
| 3202 | ret = intel_plane_calc_min_cdclk(state, plane, need_cdclk_calc); | 
|---|
| 3203 | if (ret) | 
|---|
| 3204 | return ret; | 
|---|
| 3205 | } | 
|---|
| 3206 |  | 
|---|
| 3207 | ret = intel_bw_calc_min_cdclk(state, need_cdclk_calc); | 
|---|
| 3208 | if (ret) | 
|---|
| 3209 | return ret; | 
|---|
| 3210 |  | 
|---|
| 3211 | old_cdclk_state = intel_atomic_get_old_cdclk_state(state); | 
|---|
| 3212 | new_cdclk_state = intel_atomic_get_new_cdclk_state(state); | 
|---|
| 3213 |  | 
|---|
| 3214 | if (new_cdclk_state && | 
|---|
| 3215 | old_cdclk_state->force_min_cdclk != new_cdclk_state->force_min_cdclk) | 
|---|
| 3216 | *need_cdclk_calc = true; | 
|---|
| 3217 |  | 
|---|
| 3218 | return 0; | 
|---|
| 3219 | } | 
|---|
| 3220 |  | 
|---|
| 3221 | int intel_cdclk_state_set_joined_mbus(struct intel_atomic_state *state, bool joined_mbus) | 
|---|
| 3222 | { | 
|---|
| 3223 | struct intel_cdclk_state *cdclk_state; | 
|---|
| 3224 |  | 
|---|
| 3225 | cdclk_state = intel_atomic_get_cdclk_state(state); | 
|---|
| 3226 | if (IS_ERR(ptr: cdclk_state)) | 
|---|
| 3227 | return PTR_ERR(ptr: cdclk_state); | 
|---|
| 3228 |  | 
|---|
| 3229 | cdclk_state->actual.joined_mbus = joined_mbus; | 
|---|
| 3230 | cdclk_state->logical.joined_mbus = joined_mbus; | 
|---|
| 3231 |  | 
|---|
| 3232 | return intel_atomic_lock_global_state(obj_state: &cdclk_state->base); | 
|---|
| 3233 | } | 
|---|
| 3234 |  | 
|---|
| 3235 | int intel_cdclk_init(struct intel_display *display) | 
|---|
| 3236 | { | 
|---|
| 3237 | struct intel_cdclk_state *cdclk_state; | 
|---|
| 3238 |  | 
|---|
| 3239 | cdclk_state = kzalloc(sizeof(*cdclk_state), GFP_KERNEL); | 
|---|
| 3240 | if (!cdclk_state) | 
|---|
| 3241 | return -ENOMEM; | 
|---|
| 3242 |  | 
|---|
| 3243 | intel_atomic_global_obj_init(display, obj: &display->cdclk.obj, | 
|---|
| 3244 | state: &cdclk_state->base, funcs: &intel_cdclk_funcs); | 
|---|
| 3245 |  | 
|---|
| 3246 | return 0; | 
|---|
| 3247 | } | 
|---|
| 3248 |  | 
|---|
| 3249 | static bool intel_cdclk_need_serialize(struct intel_display *display, | 
|---|
| 3250 | const struct intel_cdclk_state *old_cdclk_state, | 
|---|
| 3251 | const struct intel_cdclk_state *new_cdclk_state) | 
|---|
| 3252 | { | 
|---|
| 3253 | bool power_well_cnt_changed = hweight8(old_cdclk_state->active_pipes) != | 
|---|
| 3254 | hweight8(new_cdclk_state->active_pipes); | 
|---|
| 3255 | bool cdclk_changed = intel_cdclk_changed(a: &old_cdclk_state->actual, | 
|---|
| 3256 | b: &new_cdclk_state->actual); | 
|---|
| 3257 | /* | 
|---|
| 3258 | * We need to poke hw for gen >= 12, because we notify PCode if | 
|---|
| 3259 | * pipe power well count changes. | 
|---|
| 3260 | */ | 
|---|
| 3261 | return cdclk_changed || (display->platform.dg2 && power_well_cnt_changed); | 
|---|
| 3262 | } | 
|---|
| 3263 |  | 
|---|
| 3264 | int intel_modeset_calc_cdclk(struct intel_atomic_state *state) | 
|---|
| 3265 | { | 
|---|
| 3266 | struct intel_display *display = to_intel_display(state); | 
|---|
| 3267 | const struct intel_cdclk_state *old_cdclk_state; | 
|---|
| 3268 | struct intel_cdclk_state *new_cdclk_state; | 
|---|
| 3269 | enum pipe pipe = INVALID_PIPE; | 
|---|
| 3270 | int ret; | 
|---|
| 3271 |  | 
|---|
| 3272 | new_cdclk_state = intel_atomic_get_cdclk_state(state); | 
|---|
| 3273 | if (IS_ERR(ptr: new_cdclk_state)) | 
|---|
| 3274 | return PTR_ERR(ptr: new_cdclk_state); | 
|---|
| 3275 |  | 
|---|
| 3276 | old_cdclk_state = intel_atomic_get_old_cdclk_state(state); | 
|---|
| 3277 |  | 
|---|
| 3278 | new_cdclk_state->active_pipes = | 
|---|
| 3279 | intel_calc_active_pipes(state, active_pipes: old_cdclk_state->active_pipes); | 
|---|
| 3280 |  | 
|---|
| 3281 | ret = intel_cdclk_modeset_calc_cdclk(state); | 
|---|
| 3282 | if (ret) | 
|---|
| 3283 | return ret; | 
|---|
| 3284 |  | 
|---|
| 3285 | if (intel_cdclk_need_serialize(display, old_cdclk_state, new_cdclk_state)) { | 
|---|
| 3286 | /* | 
|---|
| 3287 | * Also serialize commits across all crtcs | 
|---|
| 3288 | * if the actual hw needs to be poked. | 
|---|
| 3289 | */ | 
|---|
| 3290 | ret = intel_atomic_serialize_global_state(obj_state: &new_cdclk_state->base); | 
|---|
| 3291 | if (ret) | 
|---|
| 3292 | return ret; | 
|---|
| 3293 | } else if (old_cdclk_state->active_pipes != new_cdclk_state->active_pipes || | 
|---|
| 3294 | old_cdclk_state->force_min_cdclk != new_cdclk_state->force_min_cdclk || | 
|---|
| 3295 | intel_cdclk_changed(a: &old_cdclk_state->logical, | 
|---|
| 3296 | b: &new_cdclk_state->logical)) { | 
|---|
| 3297 | ret = intel_atomic_lock_global_state(obj_state: &new_cdclk_state->base); | 
|---|
| 3298 | if (ret) | 
|---|
| 3299 | return ret; | 
|---|
| 3300 | } else { | 
|---|
| 3301 | return 0; | 
|---|
| 3302 | } | 
|---|
| 3303 |  | 
|---|
| 3304 | if (is_power_of_2(n: new_cdclk_state->active_pipes) && | 
|---|
| 3305 | intel_cdclk_can_cd2x_update(display, | 
|---|
| 3306 | a: &old_cdclk_state->actual, | 
|---|
| 3307 | b: &new_cdclk_state->actual)) { | 
|---|
| 3308 | struct intel_crtc *crtc; | 
|---|
| 3309 | struct intel_crtc_state *crtc_state; | 
|---|
| 3310 |  | 
|---|
| 3311 | pipe = ilog2(new_cdclk_state->active_pipes); | 
|---|
| 3312 | crtc = intel_crtc_for_pipe(display, pipe); | 
|---|
| 3313 |  | 
|---|
| 3314 | crtc_state = intel_atomic_get_crtc_state(state: &state->base, crtc); | 
|---|
| 3315 | if (IS_ERR(ptr: crtc_state)) | 
|---|
| 3316 | return PTR_ERR(ptr: crtc_state); | 
|---|
| 3317 |  | 
|---|
| 3318 | if (intel_crtc_needs_modeset(crtc_state)) | 
|---|
| 3319 | pipe = INVALID_PIPE; | 
|---|
| 3320 | } | 
|---|
| 3321 |  | 
|---|
| 3322 | if (intel_cdclk_can_crawl_and_squash(display, | 
|---|
| 3323 | a: &old_cdclk_state->actual, | 
|---|
| 3324 | b: &new_cdclk_state->actual)) { | 
|---|
| 3325 | drm_dbg_kms(display->drm, | 
|---|
| 3326 | "Can change cdclk via crawling and squashing\n"); | 
|---|
| 3327 | } else if (intel_cdclk_can_squash(display, | 
|---|
| 3328 | a: &old_cdclk_state->actual, | 
|---|
| 3329 | b: &new_cdclk_state->actual)) { | 
|---|
| 3330 | drm_dbg_kms(display->drm, | 
|---|
| 3331 | "Can change cdclk via squashing\n"); | 
|---|
| 3332 | } else if (intel_cdclk_can_crawl(display, | 
|---|
| 3333 | a: &old_cdclk_state->actual, | 
|---|
| 3334 | b: &new_cdclk_state->actual)) { | 
|---|
| 3335 | drm_dbg_kms(display->drm, | 
|---|
| 3336 | "Can change cdclk via crawling\n"); | 
|---|
| 3337 | } else if (pipe != INVALID_PIPE) { | 
|---|
| 3338 | new_cdclk_state->pipe = pipe; | 
|---|
| 3339 |  | 
|---|
| 3340 | drm_dbg_kms(display->drm, | 
|---|
| 3341 | "Can change cdclk cd2x divider with pipe %c active\n", | 
|---|
| 3342 | pipe_name(pipe)); | 
|---|
| 3343 | } else if (intel_cdclk_clock_changed(a: &old_cdclk_state->actual, | 
|---|
| 3344 | b: &new_cdclk_state->actual)) { | 
|---|
| 3345 | /* All pipes must be switched off while we change the cdclk. */ | 
|---|
| 3346 | ret = intel_modeset_all_pipes_late(state, reason: "CDCLK change"); | 
|---|
| 3347 | if (ret) | 
|---|
| 3348 | return ret; | 
|---|
| 3349 |  | 
|---|
| 3350 | new_cdclk_state->disable_pipes = true; | 
|---|
| 3351 |  | 
|---|
| 3352 | drm_dbg_kms(display->drm, | 
|---|
| 3353 | "Modeset required for cdclk change\n"); | 
|---|
| 3354 | } | 
|---|
| 3355 |  | 
|---|
| 3356 | if (intel_mdclk_cdclk_ratio(display, cdclk_config: &old_cdclk_state->actual) != | 
|---|
| 3357 | intel_mdclk_cdclk_ratio(display, cdclk_config: &new_cdclk_state->actual)) { | 
|---|
| 3358 | int ratio = intel_mdclk_cdclk_ratio(display, cdclk_config: &new_cdclk_state->actual); | 
|---|
| 3359 |  | 
|---|
| 3360 | ret = intel_dbuf_state_set_mdclk_cdclk_ratio(state, ratio); | 
|---|
| 3361 | if (ret) | 
|---|
| 3362 | return ret; | 
|---|
| 3363 | } | 
|---|
| 3364 |  | 
|---|
| 3365 | drm_dbg_kms(display->drm, | 
|---|
| 3366 | "New cdclk calculated to be logical %u kHz, actual %u kHz\n", | 
|---|
| 3367 | new_cdclk_state->logical.cdclk, | 
|---|
| 3368 | new_cdclk_state->actual.cdclk); | 
|---|
| 3369 | drm_dbg_kms(display->drm, | 
|---|
| 3370 | "New voltage level calculated to be logical %u, actual %u\n", | 
|---|
| 3371 | new_cdclk_state->logical.voltage_level, | 
|---|
| 3372 | new_cdclk_state->actual.voltage_level); | 
|---|
| 3373 |  | 
|---|
| 3374 | return 0; | 
|---|
| 3375 | } | 
|---|
| 3376 |  | 
|---|
| 3377 | void intel_cdclk_update_hw_state(struct intel_display *display) | 
|---|
| 3378 | { | 
|---|
| 3379 | const struct intel_bw_state *bw_state = | 
|---|
| 3380 | to_intel_bw_state(obj_state: display->bw.obj.state); | 
|---|
| 3381 | struct intel_cdclk_state *cdclk_state = | 
|---|
| 3382 | to_intel_cdclk_state(display->cdclk.obj.state); | 
|---|
| 3383 | struct intel_crtc *crtc; | 
|---|
| 3384 |  | 
|---|
| 3385 | cdclk_state->active_pipes = 0; | 
|---|
| 3386 |  | 
|---|
| 3387 | for_each_intel_crtc(display->drm, crtc) { | 
|---|
| 3388 | const struct intel_crtc_state *crtc_state = | 
|---|
| 3389 | to_intel_crtc_state(crtc->base.state); | 
|---|
| 3390 | enum pipe pipe = crtc->pipe; | 
|---|
| 3391 |  | 
|---|
| 3392 | if (crtc_state->hw.active) | 
|---|
| 3393 | cdclk_state->active_pipes |= BIT(pipe); | 
|---|
| 3394 |  | 
|---|
| 3395 | cdclk_state->min_cdclk[pipe] = intel_crtc_compute_min_cdclk(crtc_state); | 
|---|
| 3396 | cdclk_state->min_voltage_level[pipe] = crtc_state->min_voltage_level; | 
|---|
| 3397 | } | 
|---|
| 3398 |  | 
|---|
| 3399 | cdclk_state->bw_min_cdclk = intel_bw_min_cdclk(display, bw_state); | 
|---|
| 3400 | } | 
|---|
| 3401 |  | 
|---|
| 3402 | void intel_cdclk_crtc_disable_noatomic(struct intel_crtc *crtc) | 
|---|
| 3403 | { | 
|---|
| 3404 | struct intel_display *display = to_intel_display(crtc); | 
|---|
| 3405 |  | 
|---|
| 3406 | intel_cdclk_update_hw_state(display); | 
|---|
| 3407 | } | 
|---|
| 3408 |  | 
|---|
| 3409 | static int intel_compute_max_dotclk(struct intel_display *display) | 
|---|
| 3410 | { | 
|---|
| 3411 | int ppc = intel_cdclk_ppc(display, HAS_DOUBLE_WIDE(display)); | 
|---|
| 3412 | int guardband = intel_cdclk_guardband(display); | 
|---|
| 3413 | int max_cdclk_freq = display->cdclk.max_cdclk_freq; | 
|---|
| 3414 |  | 
|---|
| 3415 | return ppc * max_cdclk_freq * guardband / 100; | 
|---|
| 3416 | } | 
|---|
| 3417 |  | 
|---|
| 3418 | /** | 
|---|
| 3419 | * intel_update_max_cdclk - Determine the maximum support CDCLK frequency | 
|---|
| 3420 | * @display: display instance | 
|---|
| 3421 | * | 
|---|
| 3422 | * Determine the maximum CDCLK frequency the platform supports, and also | 
|---|
| 3423 | * derive the maximum dot clock frequency the maximum CDCLK frequency | 
|---|
| 3424 | * allows. | 
|---|
| 3425 | */ | 
|---|
| 3426 | void intel_update_max_cdclk(struct intel_display *display) | 
|---|
| 3427 | { | 
|---|
| 3428 | if (DISPLAY_VERx100(display) >= 3002) { | 
|---|
| 3429 | display->cdclk.max_cdclk_freq = 480000; | 
|---|
| 3430 | } else if (DISPLAY_VER(display) >= 30) { | 
|---|
| 3431 | display->cdclk.max_cdclk_freq = 691200; | 
|---|
| 3432 | } else if (display->platform.jasperlake || display->platform.elkhartlake) { | 
|---|
| 3433 | if (display->cdclk.hw.ref == 24000) | 
|---|
| 3434 | display->cdclk.max_cdclk_freq = 552000; | 
|---|
| 3435 | else | 
|---|
| 3436 | display->cdclk.max_cdclk_freq = 556800; | 
|---|
| 3437 | } else if (DISPLAY_VER(display) >= 11) { | 
|---|
| 3438 | if (display->cdclk.hw.ref == 24000) | 
|---|
| 3439 | display->cdclk.max_cdclk_freq = 648000; | 
|---|
| 3440 | else | 
|---|
| 3441 | display->cdclk.max_cdclk_freq = 652800; | 
|---|
| 3442 | } else if (display->platform.geminilake) { | 
|---|
| 3443 | display->cdclk.max_cdclk_freq = 316800; | 
|---|
| 3444 | } else if (display->platform.broxton) { | 
|---|
| 3445 | display->cdclk.max_cdclk_freq = 624000; | 
|---|
| 3446 | } else if (DISPLAY_VER(display) == 9) { | 
|---|
| 3447 | u32 limit = intel_de_read(display, SKL_DFSM) & SKL_DFSM_CDCLK_LIMIT_MASK; | 
|---|
| 3448 | int max_cdclk, vco; | 
|---|
| 3449 |  | 
|---|
| 3450 | vco = display->cdclk.skl_preferred_vco_freq; | 
|---|
| 3451 | drm_WARN_ON(display->drm, vco != 8100000 && vco != 8640000); | 
|---|
| 3452 |  | 
|---|
| 3453 | /* | 
|---|
| 3454 | * Use the lower (vco 8640) cdclk values as a | 
|---|
| 3455 | * first guess. skl_calc_cdclk() will correct it | 
|---|
| 3456 | * if the preferred vco is 8100 instead. | 
|---|
| 3457 | */ | 
|---|
| 3458 | if (limit == SKL_DFSM_CDCLK_LIMIT_675) | 
|---|
| 3459 | max_cdclk = 617143; | 
|---|
| 3460 | else if (limit == SKL_DFSM_CDCLK_LIMIT_540) | 
|---|
| 3461 | max_cdclk = 540000; | 
|---|
| 3462 | else if (limit == SKL_DFSM_CDCLK_LIMIT_450) | 
|---|
| 3463 | max_cdclk = 432000; | 
|---|
| 3464 | else | 
|---|
| 3465 | max_cdclk = 308571; | 
|---|
| 3466 |  | 
|---|
| 3467 | display->cdclk.max_cdclk_freq = skl_calc_cdclk(min_cdclk: max_cdclk, vco); | 
|---|
| 3468 | } else if (display->platform.broadwell)  { | 
|---|
| 3469 | /* | 
|---|
| 3470 | * FIXME with extra cooling we can allow | 
|---|
| 3471 | * 540 MHz for ULX and 675 Mhz for ULT. | 
|---|
| 3472 | * How can we know if extra cooling is | 
|---|
| 3473 | * available? PCI ID, VTB, something else? | 
|---|
| 3474 | */ | 
|---|
| 3475 | if (intel_de_read(display, FUSE_STRAP) & HSW_CDCLK_LIMIT) | 
|---|
| 3476 | display->cdclk.max_cdclk_freq = 450000; | 
|---|
| 3477 | else if (display->platform.broadwell_ulx) | 
|---|
| 3478 | display->cdclk.max_cdclk_freq = 450000; | 
|---|
| 3479 | else if (display->platform.broadwell_ult) | 
|---|
| 3480 | display->cdclk.max_cdclk_freq = 540000; | 
|---|
| 3481 | else | 
|---|
| 3482 | display->cdclk.max_cdclk_freq = 675000; | 
|---|
| 3483 | } else if (display->platform.cherryview) { | 
|---|
| 3484 | display->cdclk.max_cdclk_freq = 320000; | 
|---|
| 3485 | } else if (display->platform.valleyview) { | 
|---|
| 3486 | display->cdclk.max_cdclk_freq = 400000; | 
|---|
| 3487 | } else { | 
|---|
| 3488 | /* otherwise assume cdclk is fixed */ | 
|---|
| 3489 | display->cdclk.max_cdclk_freq = display->cdclk.hw.cdclk; | 
|---|
| 3490 | } | 
|---|
| 3491 |  | 
|---|
| 3492 | display->cdclk.max_dotclk_freq = intel_compute_max_dotclk(display); | 
|---|
| 3493 |  | 
|---|
| 3494 | drm_dbg(display->drm, "Max CD clock rate: %d kHz\n", | 
|---|
| 3495 | display->cdclk.max_cdclk_freq); | 
|---|
| 3496 |  | 
|---|
| 3497 | drm_dbg(display->drm, "Max dotclock rate: %d kHz\n", | 
|---|
| 3498 | display->cdclk.max_dotclk_freq); | 
|---|
| 3499 | } | 
|---|
| 3500 |  | 
|---|
| 3501 | /** | 
|---|
| 3502 | * intel_update_cdclk - Determine the current CDCLK frequency | 
|---|
| 3503 | * @display: display instance | 
|---|
| 3504 | * | 
|---|
| 3505 | * Determine the current CDCLK frequency. | 
|---|
| 3506 | */ | 
|---|
| 3507 | void intel_update_cdclk(struct intel_display *display) | 
|---|
| 3508 | { | 
|---|
| 3509 | intel_cdclk_get_cdclk(display, cdclk_config: &display->cdclk.hw); | 
|---|
| 3510 |  | 
|---|
| 3511 | /* | 
|---|
| 3512 | * 9:0 CMBUS [sic] CDCLK frequency (cdfreq): | 
|---|
| 3513 | * Programmng [sic] note: bit[9:2] should be programmed to the number | 
|---|
| 3514 | * of cdclk that generates 4MHz reference clock freq which is used to | 
|---|
| 3515 | * generate GMBus clock. This will vary with the cdclk freq. | 
|---|
| 3516 | */ | 
|---|
| 3517 | if (display->platform.valleyview || display->platform.cherryview) | 
|---|
| 3518 | intel_de_write(display, GMBUSFREQ_VLV, | 
|---|
| 3519 | DIV_ROUND_UP(display->cdclk.hw.cdclk, 1000)); | 
|---|
| 3520 | } | 
|---|
| 3521 |  | 
|---|
| 3522 | static int dg1_rawclk(struct intel_display *display) | 
|---|
| 3523 | { | 
|---|
| 3524 | /* | 
|---|
| 3525 | * DG1 always uses a 38.4 MHz rawclk.  The bspec tells us | 
|---|
| 3526 | * "Program Numerator=2, Denominator=4, Divider=37 decimal." | 
|---|
| 3527 | */ | 
|---|
| 3528 | intel_de_write(display, PCH_RAWCLK_FREQ, | 
|---|
| 3529 | CNP_RAWCLK_DEN(4) | CNP_RAWCLK_DIV(37) | ICP_RAWCLK_NUM(2)); | 
|---|
| 3530 |  | 
|---|
| 3531 | return 38400; | 
|---|
| 3532 | } | 
|---|
| 3533 |  | 
|---|
| 3534 | static int cnp_rawclk(struct intel_display *display) | 
|---|
| 3535 | { | 
|---|
| 3536 | int divider, fraction; | 
|---|
| 3537 | u32 rawclk; | 
|---|
| 3538 |  | 
|---|
| 3539 | if (intel_de_read(display, SFUSE_STRAP) & SFUSE_STRAP_RAW_FREQUENCY) { | 
|---|
| 3540 | /* 24 MHz */ | 
|---|
| 3541 | divider = 24000; | 
|---|
| 3542 | fraction = 0; | 
|---|
| 3543 | } else { | 
|---|
| 3544 | /* 19.2 MHz */ | 
|---|
| 3545 | divider = 19000; | 
|---|
| 3546 | fraction = 200; | 
|---|
| 3547 | } | 
|---|
| 3548 |  | 
|---|
| 3549 | rawclk = CNP_RAWCLK_DIV(divider / 1000); | 
|---|
| 3550 | if (fraction) { | 
|---|
| 3551 | int numerator = 1; | 
|---|
| 3552 |  | 
|---|
| 3553 | rawclk |= CNP_RAWCLK_DEN(DIV_ROUND_CLOSEST(numerator * 1000, | 
|---|
| 3554 | fraction) - 1); | 
|---|
| 3555 | if (INTEL_PCH_TYPE(display) >= PCH_ICP) | 
|---|
| 3556 | rawclk |= ICP_RAWCLK_NUM(numerator); | 
|---|
| 3557 | } | 
|---|
| 3558 |  | 
|---|
| 3559 | intel_de_write(display, PCH_RAWCLK_FREQ, val: rawclk); | 
|---|
| 3560 | return divider + fraction; | 
|---|
| 3561 | } | 
|---|
| 3562 |  | 
|---|
| 3563 | static int pch_rawclk(struct intel_display *display) | 
|---|
| 3564 | { | 
|---|
| 3565 | return (intel_de_read(display, PCH_RAWCLK_FREQ) & RAWCLK_FREQ_MASK) * 1000; | 
|---|
| 3566 | } | 
|---|
| 3567 |  | 
|---|
| 3568 | static int vlv_hrawclk(struct intel_display *display) | 
|---|
| 3569 | { | 
|---|
| 3570 | /* RAWCLK_FREQ_VLV register updated from power well code */ | 
|---|
| 3571 | return vlv_get_cck_clock_hpll(drm: display->drm, name: "hrawclk", | 
|---|
| 3572 | CCK_DISPLAY_REF_CLOCK_CONTROL); | 
|---|
| 3573 | } | 
|---|
| 3574 |  | 
|---|
| 3575 | static int i9xx_hrawclk(struct intel_display *display) | 
|---|
| 3576 | { | 
|---|
| 3577 | struct drm_i915_private *i915 = to_i915(dev: display->drm); | 
|---|
| 3578 |  | 
|---|
| 3579 | /* hrawclock is 1/4 the FSB frequency */ | 
|---|
| 3580 | return DIV_ROUND_CLOSEST(intel_fsb_freq(i915), 4); | 
|---|
| 3581 | } | 
|---|
| 3582 |  | 
|---|
| 3583 | /** | 
|---|
| 3584 | * intel_read_rawclk - Determine the current RAWCLK frequency | 
|---|
| 3585 | * @display: display instance | 
|---|
| 3586 | * | 
|---|
| 3587 | * Determine the current RAWCLK frequency. RAWCLK is a fixed | 
|---|
| 3588 | * frequency clock so this needs to done only once. | 
|---|
| 3589 | */ | 
|---|
| 3590 | u32 intel_read_rawclk(struct intel_display *display) | 
|---|
| 3591 | { | 
|---|
| 3592 | u32 freq; | 
|---|
| 3593 |  | 
|---|
| 3594 | if (INTEL_PCH_TYPE(display) >= PCH_MTL) | 
|---|
| 3595 | /* | 
|---|
| 3596 | * MTL always uses a 38.4 MHz rawclk.  The bspec tells us | 
|---|
| 3597 | * "RAWCLK_FREQ defaults to the values for 38.4 and does | 
|---|
| 3598 | * not need to be programmed." | 
|---|
| 3599 | */ | 
|---|
| 3600 | freq = 38400; | 
|---|
| 3601 | else if (INTEL_PCH_TYPE(display) >= PCH_DG1) | 
|---|
| 3602 | freq = dg1_rawclk(display); | 
|---|
| 3603 | else if (INTEL_PCH_TYPE(display) >= PCH_CNP) | 
|---|
| 3604 | freq = cnp_rawclk(display); | 
|---|
| 3605 | else if (HAS_PCH_SPLIT(display)) | 
|---|
| 3606 | freq = pch_rawclk(display); | 
|---|
| 3607 | else if (display->platform.valleyview || display->platform.cherryview) | 
|---|
| 3608 | freq = vlv_hrawclk(display); | 
|---|
| 3609 | else if (DISPLAY_VER(display) >= 3) | 
|---|
| 3610 | freq = i9xx_hrawclk(display); | 
|---|
| 3611 | else | 
|---|
| 3612 | /* no rawclk on other platforms, or no need to know it */ | 
|---|
| 3613 | return 0; | 
|---|
| 3614 |  | 
|---|
| 3615 | return freq; | 
|---|
| 3616 | } | 
|---|
| 3617 |  | 
|---|
| 3618 | static int i915_cdclk_info_show(struct seq_file *m, void *unused) | 
|---|
| 3619 | { | 
|---|
| 3620 | struct intel_display *display = m->private; | 
|---|
| 3621 |  | 
|---|
| 3622 | seq_printf(m, fmt: "Current CD clock frequency: %d kHz\n", display->cdclk.hw.cdclk); | 
|---|
| 3623 | seq_printf(m, fmt: "Max CD clock frequency: %d kHz\n", display->cdclk.max_cdclk_freq); | 
|---|
| 3624 | seq_printf(m, fmt: "Max pixel clock frequency: %d kHz\n", display->cdclk.max_dotclk_freq); | 
|---|
| 3625 |  | 
|---|
| 3626 | return 0; | 
|---|
| 3627 | } | 
|---|
| 3628 |  | 
|---|
| 3629 | DEFINE_SHOW_ATTRIBUTE(i915_cdclk_info); | 
|---|
| 3630 |  | 
|---|
| 3631 | void intel_cdclk_debugfs_register(struct intel_display *display) | 
|---|
| 3632 | { | 
|---|
| 3633 | debugfs_create_file( "i915_cdclk_info", 0444, display->drm->debugfs_root, | 
|---|
| 3634 | display, &i915_cdclk_info_fops); | 
|---|
| 3635 | } | 
|---|
| 3636 |  | 
|---|
| 3637 | static const struct intel_cdclk_funcs xe3lpd_cdclk_funcs = { | 
|---|
| 3638 | .get_cdclk = bxt_get_cdclk, | 
|---|
| 3639 | .set_cdclk = bxt_set_cdclk, | 
|---|
| 3640 | .modeset_calc_cdclk = bxt_modeset_calc_cdclk, | 
|---|
| 3641 | .calc_voltage_level = xe3lpd_calc_voltage_level, | 
|---|
| 3642 | }; | 
|---|
| 3643 |  | 
|---|
| 3644 | static const struct intel_cdclk_funcs rplu_cdclk_funcs = { | 
|---|
| 3645 | .get_cdclk = bxt_get_cdclk, | 
|---|
| 3646 | .set_cdclk = bxt_set_cdclk, | 
|---|
| 3647 | .modeset_calc_cdclk = bxt_modeset_calc_cdclk, | 
|---|
| 3648 | .calc_voltage_level = rplu_calc_voltage_level, | 
|---|
| 3649 | }; | 
|---|
| 3650 |  | 
|---|
| 3651 | static const struct intel_cdclk_funcs tgl_cdclk_funcs = { | 
|---|
| 3652 | .get_cdclk = bxt_get_cdclk, | 
|---|
| 3653 | .set_cdclk = bxt_set_cdclk, | 
|---|
| 3654 | .modeset_calc_cdclk = bxt_modeset_calc_cdclk, | 
|---|
| 3655 | .calc_voltage_level = tgl_calc_voltage_level, | 
|---|
| 3656 | }; | 
|---|
| 3657 |  | 
|---|
| 3658 | static const struct intel_cdclk_funcs ehl_cdclk_funcs = { | 
|---|
| 3659 | .get_cdclk = bxt_get_cdclk, | 
|---|
| 3660 | .set_cdclk = bxt_set_cdclk, | 
|---|
| 3661 | .modeset_calc_cdclk = bxt_modeset_calc_cdclk, | 
|---|
| 3662 | .calc_voltage_level = ehl_calc_voltage_level, | 
|---|
| 3663 | }; | 
|---|
| 3664 |  | 
|---|
| 3665 | static const struct intel_cdclk_funcs icl_cdclk_funcs = { | 
|---|
| 3666 | .get_cdclk = bxt_get_cdclk, | 
|---|
| 3667 | .set_cdclk = bxt_set_cdclk, | 
|---|
| 3668 | .modeset_calc_cdclk = bxt_modeset_calc_cdclk, | 
|---|
| 3669 | .calc_voltage_level = icl_calc_voltage_level, | 
|---|
| 3670 | }; | 
|---|
| 3671 |  | 
|---|
| 3672 | static const struct intel_cdclk_funcs bxt_cdclk_funcs = { | 
|---|
| 3673 | .get_cdclk = bxt_get_cdclk, | 
|---|
| 3674 | .set_cdclk = bxt_set_cdclk, | 
|---|
| 3675 | .modeset_calc_cdclk = bxt_modeset_calc_cdclk, | 
|---|
| 3676 | .calc_voltage_level = bxt_calc_voltage_level, | 
|---|
| 3677 | }; | 
|---|
| 3678 |  | 
|---|
| 3679 | static const struct intel_cdclk_funcs skl_cdclk_funcs = { | 
|---|
| 3680 | .get_cdclk = skl_get_cdclk, | 
|---|
| 3681 | .set_cdclk = skl_set_cdclk, | 
|---|
| 3682 | .modeset_calc_cdclk = skl_modeset_calc_cdclk, | 
|---|
| 3683 | }; | 
|---|
| 3684 |  | 
|---|
| 3685 | static const struct intel_cdclk_funcs bdw_cdclk_funcs = { | 
|---|
| 3686 | .get_cdclk = bdw_get_cdclk, | 
|---|
| 3687 | .set_cdclk = bdw_set_cdclk, | 
|---|
| 3688 | .modeset_calc_cdclk = bdw_modeset_calc_cdclk, | 
|---|
| 3689 | }; | 
|---|
| 3690 |  | 
|---|
| 3691 | static const struct intel_cdclk_funcs chv_cdclk_funcs = { | 
|---|
| 3692 | .get_cdclk = vlv_get_cdclk, | 
|---|
| 3693 | .set_cdclk = chv_set_cdclk, | 
|---|
| 3694 | .modeset_calc_cdclk = vlv_modeset_calc_cdclk, | 
|---|
| 3695 | }; | 
|---|
| 3696 |  | 
|---|
| 3697 | static const struct intel_cdclk_funcs vlv_cdclk_funcs = { | 
|---|
| 3698 | .get_cdclk = vlv_get_cdclk, | 
|---|
| 3699 | .set_cdclk = vlv_set_cdclk, | 
|---|
| 3700 | .modeset_calc_cdclk = vlv_modeset_calc_cdclk, | 
|---|
| 3701 | }; | 
|---|
| 3702 |  | 
|---|
| 3703 | static const struct intel_cdclk_funcs hsw_cdclk_funcs = { | 
|---|
| 3704 | .get_cdclk = hsw_get_cdclk, | 
|---|
| 3705 | .modeset_calc_cdclk = fixed_modeset_calc_cdclk, | 
|---|
| 3706 | }; | 
|---|
| 3707 |  | 
|---|
| 3708 | /* SNB, IVB, 965G, 945G */ | 
|---|
| 3709 | static const struct intel_cdclk_funcs fixed_400mhz_cdclk_funcs = { | 
|---|
| 3710 | .get_cdclk = fixed_400mhz_get_cdclk, | 
|---|
| 3711 | .modeset_calc_cdclk = fixed_modeset_calc_cdclk, | 
|---|
| 3712 | }; | 
|---|
| 3713 |  | 
|---|
| 3714 | static const struct intel_cdclk_funcs ilk_cdclk_funcs = { | 
|---|
| 3715 | .get_cdclk = fixed_450mhz_get_cdclk, | 
|---|
| 3716 | .modeset_calc_cdclk = fixed_modeset_calc_cdclk, | 
|---|
| 3717 | }; | 
|---|
| 3718 |  | 
|---|
| 3719 | static const struct intel_cdclk_funcs gm45_cdclk_funcs = { | 
|---|
| 3720 | .get_cdclk = gm45_get_cdclk, | 
|---|
| 3721 | .modeset_calc_cdclk = fixed_modeset_calc_cdclk, | 
|---|
| 3722 | }; | 
|---|
| 3723 |  | 
|---|
| 3724 | /* G45 uses G33 */ | 
|---|
| 3725 |  | 
|---|
| 3726 | static const struct intel_cdclk_funcs i965gm_cdclk_funcs = { | 
|---|
| 3727 | .get_cdclk = i965gm_get_cdclk, | 
|---|
| 3728 | .modeset_calc_cdclk = fixed_modeset_calc_cdclk, | 
|---|
| 3729 | }; | 
|---|
| 3730 |  | 
|---|
| 3731 | /* i965G uses fixed 400 */ | 
|---|
| 3732 |  | 
|---|
| 3733 | static const struct intel_cdclk_funcs pnv_cdclk_funcs = { | 
|---|
| 3734 | .get_cdclk = pnv_get_cdclk, | 
|---|
| 3735 | .modeset_calc_cdclk = fixed_modeset_calc_cdclk, | 
|---|
| 3736 | }; | 
|---|
| 3737 |  | 
|---|
| 3738 | static const struct intel_cdclk_funcs g33_cdclk_funcs = { | 
|---|
| 3739 | .get_cdclk = g33_get_cdclk, | 
|---|
| 3740 | .modeset_calc_cdclk = fixed_modeset_calc_cdclk, | 
|---|
| 3741 | }; | 
|---|
| 3742 |  | 
|---|
| 3743 | static const struct intel_cdclk_funcs i945gm_cdclk_funcs = { | 
|---|
| 3744 | .get_cdclk = i945gm_get_cdclk, | 
|---|
| 3745 | .modeset_calc_cdclk = fixed_modeset_calc_cdclk, | 
|---|
| 3746 | }; | 
|---|
| 3747 |  | 
|---|
| 3748 | /* i945G uses fixed 400 */ | 
|---|
| 3749 |  | 
|---|
| 3750 | static const struct intel_cdclk_funcs i915gm_cdclk_funcs = { | 
|---|
| 3751 | .get_cdclk = i915gm_get_cdclk, | 
|---|
| 3752 | .modeset_calc_cdclk = fixed_modeset_calc_cdclk, | 
|---|
| 3753 | }; | 
|---|
| 3754 |  | 
|---|
| 3755 | static const struct intel_cdclk_funcs i915g_cdclk_funcs = { | 
|---|
| 3756 | .get_cdclk = fixed_333mhz_get_cdclk, | 
|---|
| 3757 | .modeset_calc_cdclk = fixed_modeset_calc_cdclk, | 
|---|
| 3758 | }; | 
|---|
| 3759 |  | 
|---|
| 3760 | static const struct intel_cdclk_funcs i865g_cdclk_funcs = { | 
|---|
| 3761 | .get_cdclk = fixed_266mhz_get_cdclk, | 
|---|
| 3762 | .modeset_calc_cdclk = fixed_modeset_calc_cdclk, | 
|---|
| 3763 | }; | 
|---|
| 3764 |  | 
|---|
| 3765 | static const struct intel_cdclk_funcs i85x_cdclk_funcs = { | 
|---|
| 3766 | .get_cdclk = i85x_get_cdclk, | 
|---|
| 3767 | .modeset_calc_cdclk = fixed_modeset_calc_cdclk, | 
|---|
| 3768 | }; | 
|---|
| 3769 |  | 
|---|
| 3770 | static const struct intel_cdclk_funcs i845g_cdclk_funcs = { | 
|---|
| 3771 | .get_cdclk = fixed_200mhz_get_cdclk, | 
|---|
| 3772 | .modeset_calc_cdclk = fixed_modeset_calc_cdclk, | 
|---|
| 3773 | }; | 
|---|
| 3774 |  | 
|---|
| 3775 | static const struct intel_cdclk_funcs i830_cdclk_funcs = { | 
|---|
| 3776 | .get_cdclk = fixed_133mhz_get_cdclk, | 
|---|
| 3777 | .modeset_calc_cdclk = fixed_modeset_calc_cdclk, | 
|---|
| 3778 | }; | 
|---|
| 3779 |  | 
|---|
| 3780 | /** | 
|---|
| 3781 | * intel_init_cdclk_hooks - Initialize CDCLK related modesetting hooks | 
|---|
| 3782 | * @display: display instance | 
|---|
| 3783 | */ | 
|---|
| 3784 | void intel_init_cdclk_hooks(struct intel_display *display) | 
|---|
| 3785 | { | 
|---|
| 3786 | if (DISPLAY_VER(display) >= 30) { | 
|---|
| 3787 | display->funcs.cdclk = &xe3lpd_cdclk_funcs; | 
|---|
| 3788 | display->cdclk.table = xe3lpd_cdclk_table; | 
|---|
| 3789 | } else if (DISPLAY_VER(display) >= 20) { | 
|---|
| 3790 | display->funcs.cdclk = &rplu_cdclk_funcs; | 
|---|
| 3791 | display->cdclk.table = xe2lpd_cdclk_table; | 
|---|
| 3792 | } else if (DISPLAY_VERx100(display) >= 1401) { | 
|---|
| 3793 | display->funcs.cdclk = &rplu_cdclk_funcs; | 
|---|
| 3794 | display->cdclk.table = xe2hpd_cdclk_table; | 
|---|
| 3795 | } else if (DISPLAY_VER(display) >= 14) { | 
|---|
| 3796 | display->funcs.cdclk = &rplu_cdclk_funcs; | 
|---|
| 3797 | display->cdclk.table = mtl_cdclk_table; | 
|---|
| 3798 | } else if (display->platform.dg2) { | 
|---|
| 3799 | display->funcs.cdclk = &tgl_cdclk_funcs; | 
|---|
| 3800 | display->cdclk.table = dg2_cdclk_table; | 
|---|
| 3801 | } else if (display->platform.alderlake_p) { | 
|---|
| 3802 | /* Wa_22011320316:adl-p[a0] */ | 
|---|
| 3803 | if (display->platform.alderlake_p && IS_DISPLAY_STEP(display, STEP_A0, STEP_B0)) { | 
|---|
| 3804 | display->cdclk.table = adlp_a_step_cdclk_table; | 
|---|
| 3805 | display->funcs.cdclk = &tgl_cdclk_funcs; | 
|---|
| 3806 | } else if (display->platform.alderlake_p_raptorlake_u) { | 
|---|
| 3807 | display->cdclk.table = rplu_cdclk_table; | 
|---|
| 3808 | display->funcs.cdclk = &rplu_cdclk_funcs; | 
|---|
| 3809 | } else { | 
|---|
| 3810 | display->cdclk.table = adlp_cdclk_table; | 
|---|
| 3811 | display->funcs.cdclk = &tgl_cdclk_funcs; | 
|---|
| 3812 | } | 
|---|
| 3813 | } else if (display->platform.rocketlake) { | 
|---|
| 3814 | display->funcs.cdclk = &tgl_cdclk_funcs; | 
|---|
| 3815 | display->cdclk.table = rkl_cdclk_table; | 
|---|
| 3816 | } else if (DISPLAY_VER(display) >= 12) { | 
|---|
| 3817 | display->funcs.cdclk = &tgl_cdclk_funcs; | 
|---|
| 3818 | display->cdclk.table = icl_cdclk_table; | 
|---|
| 3819 | } else if (display->platform.jasperlake || display->platform.elkhartlake) { | 
|---|
| 3820 | display->funcs.cdclk = &ehl_cdclk_funcs; | 
|---|
| 3821 | display->cdclk.table = icl_cdclk_table; | 
|---|
| 3822 | } else if (DISPLAY_VER(display) >= 11) { | 
|---|
| 3823 | display->funcs.cdclk = &icl_cdclk_funcs; | 
|---|
| 3824 | display->cdclk.table = icl_cdclk_table; | 
|---|
| 3825 | } else if (display->platform.geminilake || display->platform.broxton) { | 
|---|
| 3826 | display->funcs.cdclk = &bxt_cdclk_funcs; | 
|---|
| 3827 | if (display->platform.geminilake) | 
|---|
| 3828 | display->cdclk.table = glk_cdclk_table; | 
|---|
| 3829 | else | 
|---|
| 3830 | display->cdclk.table = bxt_cdclk_table; | 
|---|
| 3831 | } else if (DISPLAY_VER(display) == 9) { | 
|---|
| 3832 | display->funcs.cdclk = &skl_cdclk_funcs; | 
|---|
| 3833 | } else if (display->platform.broadwell) { | 
|---|
| 3834 | display->funcs.cdclk = &bdw_cdclk_funcs; | 
|---|
| 3835 | } else if (display->platform.haswell) { | 
|---|
| 3836 | display->funcs.cdclk = &hsw_cdclk_funcs; | 
|---|
| 3837 | } else if (display->platform.cherryview) { | 
|---|
| 3838 | display->funcs.cdclk = &chv_cdclk_funcs; | 
|---|
| 3839 | } else if (display->platform.valleyview) { | 
|---|
| 3840 | display->funcs.cdclk = &vlv_cdclk_funcs; | 
|---|
| 3841 | } else if (display->platform.sandybridge || display->platform.ivybridge) { | 
|---|
| 3842 | display->funcs.cdclk = &fixed_400mhz_cdclk_funcs; | 
|---|
| 3843 | } else if (display->platform.ironlake) { | 
|---|
| 3844 | display->funcs.cdclk = &ilk_cdclk_funcs; | 
|---|
| 3845 | } else if (display->platform.gm45) { | 
|---|
| 3846 | display->funcs.cdclk = &gm45_cdclk_funcs; | 
|---|
| 3847 | } else if (display->platform.g45) { | 
|---|
| 3848 | display->funcs.cdclk = &g33_cdclk_funcs; | 
|---|
| 3849 | } else if (display->platform.i965gm) { | 
|---|
| 3850 | display->funcs.cdclk = &i965gm_cdclk_funcs; | 
|---|
| 3851 | } else if (display->platform.i965g) { | 
|---|
| 3852 | display->funcs.cdclk = &fixed_400mhz_cdclk_funcs; | 
|---|
| 3853 | } else if (display->platform.pineview) { | 
|---|
| 3854 | display->funcs.cdclk = &pnv_cdclk_funcs; | 
|---|
| 3855 | } else if (display->platform.g33) { | 
|---|
| 3856 | display->funcs.cdclk = &g33_cdclk_funcs; | 
|---|
| 3857 | } else if (display->platform.i945gm) { | 
|---|
| 3858 | display->funcs.cdclk = &i945gm_cdclk_funcs; | 
|---|
| 3859 | } else if (display->platform.i945g) { | 
|---|
| 3860 | display->funcs.cdclk = &fixed_400mhz_cdclk_funcs; | 
|---|
| 3861 | } else if (display->platform.i915gm) { | 
|---|
| 3862 | display->funcs.cdclk = &i915gm_cdclk_funcs; | 
|---|
| 3863 | } else if (display->platform.i915g) { | 
|---|
| 3864 | display->funcs.cdclk = &i915g_cdclk_funcs; | 
|---|
| 3865 | } else if (display->platform.i865g) { | 
|---|
| 3866 | display->funcs.cdclk = &i865g_cdclk_funcs; | 
|---|
| 3867 | } else if (display->platform.i85x) { | 
|---|
| 3868 | display->funcs.cdclk = &i85x_cdclk_funcs; | 
|---|
| 3869 | } else if (display->platform.i845g) { | 
|---|
| 3870 | display->funcs.cdclk = &i845g_cdclk_funcs; | 
|---|
| 3871 | } else if (display->platform.i830) { | 
|---|
| 3872 | display->funcs.cdclk = &i830_cdclk_funcs; | 
|---|
| 3873 | } | 
|---|
| 3874 |  | 
|---|
| 3875 | if (drm_WARN(display->drm, !display->funcs.cdclk, | 
|---|
| 3876 | "Unknown platform. Assuming i830\n")) | 
|---|
| 3877 | display->funcs.cdclk = &i830_cdclk_funcs; | 
|---|
| 3878 | } | 
|---|
| 3879 |  | 
|---|
| 3880 | int intel_cdclk_logical(const struct intel_cdclk_state *cdclk_state) | 
|---|
| 3881 | { | 
|---|
| 3882 | return cdclk_state->logical.cdclk; | 
|---|
| 3883 | } | 
|---|
| 3884 |  | 
|---|
| 3885 | int intel_cdclk_actual(const struct intel_cdclk_state *cdclk_state) | 
|---|
| 3886 | { | 
|---|
| 3887 | return cdclk_state->actual.cdclk; | 
|---|
| 3888 | } | 
|---|
| 3889 |  | 
|---|
| 3890 | int intel_cdclk_actual_voltage_level(const struct intel_cdclk_state *cdclk_state) | 
|---|
| 3891 | { | 
|---|
| 3892 | return cdclk_state->actual.voltage_level; | 
|---|
| 3893 | } | 
|---|
| 3894 |  | 
|---|
| 3895 | int intel_cdclk_min_cdclk(const struct intel_cdclk_state *cdclk_state, enum pipe pipe) | 
|---|
| 3896 | { | 
|---|
| 3897 | return cdclk_state->min_cdclk[pipe]; | 
|---|
| 3898 | } | 
|---|
| 3899 |  | 
|---|
| 3900 | int intel_cdclk_bw_min_cdclk(const struct intel_cdclk_state *cdclk_state) | 
|---|
| 3901 | { | 
|---|
| 3902 | return cdclk_state->bw_min_cdclk; | 
|---|
| 3903 | } | 
|---|
| 3904 |  | 
|---|
| 3905 | bool intel_cdclk_pmdemand_needs_update(struct intel_atomic_state *state) | 
|---|
| 3906 | { | 
|---|
| 3907 | const struct intel_cdclk_state *new_cdclk_state, *old_cdclk_state; | 
|---|
| 3908 |  | 
|---|
| 3909 | new_cdclk_state = intel_atomic_get_new_cdclk_state(state); | 
|---|
| 3910 | old_cdclk_state = intel_atomic_get_old_cdclk_state(state); | 
|---|
| 3911 |  | 
|---|
| 3912 | if (new_cdclk_state && | 
|---|
| 3913 | (new_cdclk_state->actual.cdclk != old_cdclk_state->actual.cdclk || | 
|---|
| 3914 | new_cdclk_state->actual.voltage_level != old_cdclk_state->actual.voltage_level)) | 
|---|
| 3915 | return true; | 
|---|
| 3916 |  | 
|---|
| 3917 | return false; | 
|---|
| 3918 | } | 
|---|
| 3919 |  | 
|---|
| 3920 | void intel_cdclk_force_min_cdclk(struct intel_cdclk_state *cdclk_state, int force_min_cdclk) | 
|---|
| 3921 | { | 
|---|
| 3922 | cdclk_state->force_min_cdclk = force_min_cdclk; | 
|---|
| 3923 | } | 
|---|
| 3924 |  | 
|---|
| 3925 | void intel_cdclk_read_hw(struct intel_display *display) | 
|---|
| 3926 | { | 
|---|
| 3927 | struct intel_cdclk_state *cdclk_state; | 
|---|
| 3928 |  | 
|---|
| 3929 | cdclk_state = to_intel_cdclk_state(display->cdclk.obj.state); | 
|---|
| 3930 |  | 
|---|
| 3931 | intel_update_cdclk(display); | 
|---|
| 3932 | intel_cdclk_dump_config(display, cdclk_config: &display->cdclk.hw, context: "Current CDCLK"); | 
|---|
| 3933 | cdclk_state->actual = display->cdclk.hw; | 
|---|
| 3934 | cdclk_state->logical = display->cdclk.hw; | 
|---|
| 3935 | } | 
|---|
| 3936 |  | 
|---|