1/*
2 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
3 * Copyright (c) 2007, 2010 Intel Corporation
4 * Jesse Barnes <jesse.barnes@intel.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
24 */
25
26#include <linux/i2c.h>
27#include <linux/slab.h>
28
29#include <drm/drm_atomic_helper.h>
30#include <drm/drm_edid.h>
31#include <drm/drm_probe_helper.h>
32
33#include "i915_drv.h"
34#include "i915_utils.h"
35#include "intel_connector.h"
36#include "intel_display_core.h"
37#include "intel_display_debugfs.h"
38#include "intel_display_types.h"
39#include "intel_hdcp.h"
40#include "intel_panel.h"
41
42static void intel_connector_modeset_retry_work_fn(struct work_struct *work)
43{
44 struct intel_connector *connector = container_of(work, typeof(*connector),
45 modeset_retry_work);
46 struct intel_display *display = to_intel_display(connector);
47
48 drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s]\n", connector->base.base.id,
49 connector->base.name);
50
51 /* Grab the locks before changing connector property*/
52 mutex_lock(lock: &display->drm->mode_config.mutex);
53 /* Set connector link status to BAD and send a Uevent to notify
54 * userspace to do a modeset.
55 */
56 drm_connector_set_link_status_property(connector: &connector->base,
57 DRM_MODE_LINK_STATUS_BAD);
58 mutex_unlock(lock: &display->drm->mode_config.mutex);
59 /* Send Hotplug uevent so userspace can reprobe */
60 drm_kms_helper_connector_hotplug_event(connector: &connector->base);
61
62 drm_connector_put(connector: &connector->base);
63}
64
65void intel_connector_queue_modeset_retry_work(struct intel_connector *connector)
66{
67 struct intel_display *display = to_intel_display(connector);
68
69 drm_connector_get(connector: &connector->base);
70 if (!queue_work(wq: display->wq.unordered, work: &connector->modeset_retry_work))
71 drm_connector_put(connector: &connector->base);
72}
73
74void intel_connector_cancel_modeset_retry_work(struct intel_connector *connector)
75{
76 if (cancel_work_sync(work: &connector->modeset_retry_work))
77 drm_connector_put(connector: &connector->base);
78}
79
80static int intel_connector_init(struct intel_connector *connector)
81{
82 struct intel_digital_connector_state *conn_state;
83
84 /*
85 * Allocate enough memory to hold intel_digital_connector_state,
86 * This might be a few bytes too many, but for connectors that don't
87 * need it we'll free the state and allocate a smaller one on the first
88 * successful commit anyway.
89 */
90 conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
91 if (!conn_state)
92 return -ENOMEM;
93
94 __drm_atomic_helper_connector_reset(connector: &connector->base,
95 conn_state: &conn_state->base);
96
97 intel_panel_init_alloc(connector);
98
99 INIT_WORK(&connector->modeset_retry_work,
100 intel_connector_modeset_retry_work_fn);
101
102 return 0;
103}
104
105struct intel_connector *intel_connector_alloc(void)
106{
107 struct intel_connector *connector;
108
109 connector = kzalloc(sizeof(*connector), GFP_KERNEL);
110 if (!connector)
111 return NULL;
112
113 if (intel_connector_init(connector) < 0) {
114 kfree(objp: connector);
115 return NULL;
116 }
117
118 return connector;
119}
120
121/*
122 * Free the bits allocated by intel_connector_alloc.
123 * This should only be used after intel_connector_alloc has returned
124 * successfully, and before drm_connector_init returns successfully.
125 * Otherwise the destroy callbacks for the connector and the state should
126 * take care of proper cleanup/free (see intel_connector_destroy).
127 */
128void intel_connector_free(struct intel_connector *connector)
129{
130 kfree(to_intel_digital_connector_state(connector->base.state));
131 kfree(objp: connector);
132}
133
134/*
135 * Connector type independent destroy hook for drm_connector_funcs.
136 */
137void intel_connector_destroy(struct drm_connector *connector)
138{
139 struct intel_connector *intel_connector = to_intel_connector(connector);
140
141 drm_edid_free(drm_edid: intel_connector->detect_edid);
142
143 intel_hdcp_cleanup(connector: intel_connector);
144
145 intel_panel_fini(connector: intel_connector);
146
147 drm_connector_cleanup(connector);
148
149 if (intel_connector->mst.port)
150 drm_dp_mst_put_port_malloc(port: intel_connector->mst.port);
151
152 kfree(objp: connector);
153}
154
155int intel_connector_register(struct drm_connector *_connector)
156{
157 struct intel_connector *connector = to_intel_connector(_connector);
158 struct drm_i915_private *i915 = to_i915(dev: _connector->dev);
159 int ret;
160
161 ret = intel_panel_register(connector);
162 if (ret)
163 goto err;
164
165 if (i915_inject_probe_failure(i915)) {
166 ret = -EFAULT;
167 goto err_panel;
168 }
169
170 intel_connector_debugfs_add(connector);
171
172 return 0;
173
174err_panel:
175 intel_panel_unregister(connector);
176err:
177 return ret;
178}
179
180void intel_connector_unregister(struct drm_connector *_connector)
181{
182 struct intel_connector *connector = to_intel_connector(_connector);
183
184 intel_panel_unregister(connector);
185}
186
187void intel_connector_attach_encoder(struct intel_connector *connector,
188 struct intel_encoder *encoder)
189{
190 connector->encoder = encoder;
191 drm_connector_attach_encoder(connector: &connector->base, encoder: &encoder->base);
192}
193
194/*
195 * Simple connector->get_hw_state implementation for encoders that support only
196 * one connector and no cloning and hence the encoder state determines the state
197 * of the connector.
198 */
199bool intel_connector_get_hw_state(struct intel_connector *connector)
200{
201 enum pipe pipe = 0;
202 struct intel_encoder *encoder = intel_attached_encoder(connector);
203
204 return encoder->get_hw_state(encoder, &pipe);
205}
206
207enum pipe intel_connector_get_pipe(struct intel_connector *connector)
208{
209 struct intel_display *display = to_intel_display(connector);
210
211 drm_modeset_lock_assert_held(lock: &display->drm->mode_config.connection_mutex);
212
213 if (!connector->base.state->crtc)
214 return INVALID_PIPE;
215
216 return to_intel_crtc(connector->base.state->crtc)->pipe;
217}
218
219/**
220 * intel_connector_update_modes - update connector from edid
221 * @connector: DRM connector device to use
222 * @drm_edid: previously read EDID information
223 */
224int intel_connector_update_modes(struct drm_connector *connector,
225 const struct drm_edid *drm_edid)
226{
227 int ret;
228
229 drm_edid_connector_update(connector, edid: drm_edid);
230 ret = drm_edid_connector_add_modes(connector);
231
232 return ret;
233}
234
235/**
236 * intel_ddc_get_modes - get modelist from monitor
237 * @connector: DRM connector device to use
238 * @ddc: DDC bus i2c adapter
239 *
240 * Fetch the EDID information from @connector using the DDC bus.
241 */
242int intel_ddc_get_modes(struct drm_connector *connector,
243 struct i2c_adapter *ddc)
244{
245 const struct drm_edid *drm_edid;
246 int ret;
247
248 drm_edid = drm_edid_read_ddc(connector, adapter: ddc);
249 if (!drm_edid)
250 return 0;
251
252 ret = intel_connector_update_modes(connector, drm_edid);
253 drm_edid_free(drm_edid);
254
255 return ret;
256}
257
258static const struct drm_prop_enum_list force_audio_names[] = {
259 { HDMI_AUDIO_OFF_DVI, "force-dvi" },
260 { .type: HDMI_AUDIO_OFF, .name: "off" },
261 { .type: HDMI_AUDIO_AUTO, .name: "auto" },
262 { .type: HDMI_AUDIO_ON, .name: "on" },
263};
264
265void
266intel_attach_force_audio_property(struct drm_connector *connector)
267{
268 struct intel_display *display = to_intel_display(connector->dev);
269 struct drm_property *prop;
270
271 prop = display->properties.force_audio;
272 if (prop == NULL) {
273 prop = drm_property_create_enum(dev: display->drm, flags: 0,
274 name: "audio",
275 props: force_audio_names,
276 ARRAY_SIZE(force_audio_names));
277 if (prop == NULL)
278 return;
279
280 display->properties.force_audio = prop;
281 }
282 drm_object_attach_property(obj: &connector->base, property: prop, init_val: 0);
283}
284
285static const struct drm_prop_enum_list broadcast_rgb_names[] = {
286 { INTEL_BROADCAST_RGB_AUTO, "Automatic" },
287 { .type: INTEL_BROADCAST_RGB_FULL, .name: "Full" },
288 { .type: INTEL_BROADCAST_RGB_LIMITED, .name: "Limited 16:235" },
289};
290
291void
292intel_attach_broadcast_rgb_property(struct drm_connector *connector)
293{
294 struct intel_display *display = to_intel_display(connector->dev);
295 struct drm_property *prop;
296
297 prop = display->properties.broadcast_rgb;
298 if (prop == NULL) {
299 prop = drm_property_create_enum(dev: display->drm, DRM_MODE_PROP_ENUM,
300 name: "Broadcast RGB",
301 props: broadcast_rgb_names,
302 ARRAY_SIZE(broadcast_rgb_names));
303 if (prop == NULL)
304 return;
305
306 display->properties.broadcast_rgb = prop;
307 }
308
309 drm_object_attach_property(obj: &connector->base, property: prop, init_val: 0);
310}
311
312void
313intel_attach_aspect_ratio_property(struct drm_connector *connector)
314{
315 if (!drm_mode_create_aspect_ratio_property(dev: connector->dev))
316 drm_object_attach_property(obj: &connector->base,
317 property: connector->dev->mode_config.aspect_ratio_property,
318 DRM_MODE_PICTURE_ASPECT_NONE);
319}
320
321void
322intel_attach_hdmi_colorspace_property(struct drm_connector *connector)
323{
324 if (!drm_mode_create_hdmi_colorspace_property(connector, supported_colorspaces: 0))
325 drm_connector_attach_colorspace_property(connector);
326}
327
328void
329intel_attach_dp_colorspace_property(struct drm_connector *connector)
330{
331 if (!drm_mode_create_dp_colorspace_property(connector, supported_colorspaces: 0))
332 drm_connector_attach_colorspace_property(connector);
333}
334
335void
336intel_attach_scaling_mode_property(struct drm_connector *connector)
337{
338 struct intel_display *display = to_intel_display(connector->dev);
339 u32 scaling_modes;
340
341 scaling_modes = BIT(DRM_MODE_SCALE_ASPECT) |
342 BIT(DRM_MODE_SCALE_FULLSCREEN);
343
344 /* On GMCH platforms borders are only possible on the LVDS port */
345 if (!HAS_GMCH(display) || connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
346 scaling_modes |= BIT(DRM_MODE_SCALE_CENTER);
347
348 drm_connector_attach_scaling_mode_property(connector, scaling_mode_mask: scaling_modes);
349
350 connector->state->scaling_mode = DRM_MODE_SCALE_ASPECT;
351}
352