| 1 | /* | 
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| 2 | * Copyright (c) 2016 Intel Corporation | 
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| 3 | * | 
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| 4 | * Permission to use, copy, modify, distribute, and sell this software and its | 
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| 5 | * documentation for any purpose is hereby granted without fee, provided that | 
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| 6 | * the above copyright notice appear in all copies and that both that copyright | 
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| 7 | * notice and this permission notice appear in supporting documentation, and | 
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| 8 | * that the name of the copyright holders not be used in advertising or | 
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| 9 | * publicity pertaining to distribution of the software without specific, | 
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| 10 | * written prior permission.  The copyright holders make no representations | 
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| 11 | * about the suitability of this software for any purpose.  It is provided "as | 
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| 12 | * is" without express or implied warranty. | 
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| 13 | * | 
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| 14 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, | 
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| 15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO | 
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| 16 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR | 
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| 17 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, | 
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| 18 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER | 
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| 19 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE | 
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| 20 | * OF THIS SOFTWARE. | 
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| 21 | */ | 
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| 22 |  | 
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| 23 | #include <linux/export.h> | 
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| 24 | #include <linux/uaccess.h> | 
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| 25 |  | 
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| 26 | #include <drm/drm_drv.h> | 
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| 27 | #include <drm/drm_encoder.h> | 
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| 28 | #include <drm/drm_file.h> | 
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| 29 | #include <drm/drm_framebuffer.h> | 
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| 30 | #include <drm/drm_managed.h> | 
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| 31 | #include <drm/drm_mode_config.h> | 
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| 32 | #include <drm/drm_print.h> | 
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| 33 | #include <linux/dma-resv.h> | 
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| 34 |  | 
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| 35 | #include "drm_crtc_internal.h" | 
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| 36 | #include "drm_internal.h" | 
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| 37 |  | 
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| 38 | int drm_modeset_register_all(struct drm_device *dev) | 
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| 39 | { | 
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| 40 | int ret; | 
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| 41 |  | 
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| 42 | ret = drm_plane_register_all(dev); | 
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| 43 | if (ret) | 
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| 44 | goto err_plane; | 
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| 45 |  | 
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| 46 | ret = drm_crtc_register_all(dev); | 
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| 47 | if  (ret) | 
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| 48 | goto err_crtc; | 
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| 49 |  | 
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| 50 | ret = drm_encoder_register_all(dev); | 
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| 51 | if (ret) | 
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| 52 | goto err_encoder; | 
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| 53 |  | 
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| 54 | ret = drm_connector_register_all(dev); | 
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| 55 | if (ret) | 
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| 56 | goto err_connector; | 
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| 57 |  | 
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| 58 | return 0; | 
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| 59 |  | 
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| 60 | err_connector: | 
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| 61 | drm_encoder_unregister_all(dev); | 
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| 62 | err_encoder: | 
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| 63 | drm_crtc_unregister_all(dev); | 
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| 64 | err_crtc: | 
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| 65 | drm_plane_unregister_all(dev); | 
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| 66 | err_plane: | 
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| 67 | return ret; | 
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| 68 | } | 
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| 69 |  | 
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| 70 | void drm_modeset_unregister_all(struct drm_device *dev) | 
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| 71 | { | 
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| 72 | drm_connector_unregister_all(dev); | 
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| 73 | drm_encoder_unregister_all(dev); | 
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| 74 | drm_crtc_unregister_all(dev); | 
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| 75 | drm_plane_unregister_all(dev); | 
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| 76 | } | 
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| 77 |  | 
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| 78 | /** | 
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| 79 | * drm_mode_getresources - get graphics configuration | 
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| 80 | * @dev: drm device for the ioctl | 
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| 81 | * @data: data pointer for the ioctl | 
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| 82 | * @file_priv: drm file for the ioctl call | 
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| 83 | * | 
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| 84 | * Construct a set of configuration description structures and return | 
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| 85 | * them to the user, including CRTC, connector and framebuffer configuration. | 
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| 86 | * | 
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| 87 | * Called by the user via ioctl. | 
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| 88 | * | 
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| 89 | * Returns: | 
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| 90 | * Zero on success, negative errno on failure. | 
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| 91 | */ | 
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| 92 | int drm_mode_getresources(struct drm_device *dev, void *data, | 
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| 93 | struct drm_file *file_priv) | 
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| 94 | { | 
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| 95 | struct drm_mode_card_res *card_res = data; | 
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| 96 | struct drm_framebuffer *fb; | 
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| 97 | struct drm_connector *connector; | 
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| 98 | struct drm_crtc *crtc; | 
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| 99 | struct drm_encoder *encoder; | 
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| 100 | int count, ret = 0; | 
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| 101 | uint32_t __user *fb_id; | 
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| 102 | uint32_t __user *crtc_id; | 
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| 103 | uint32_t __user *connector_id; | 
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| 104 | uint32_t __user *encoder_id; | 
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| 105 | struct drm_connector_list_iter conn_iter; | 
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| 106 |  | 
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| 107 | if (!drm_core_check_feature(dev, feature: DRIVER_MODESET)) | 
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| 108 | return -EOPNOTSUPP; | 
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| 109 |  | 
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| 110 | mutex_lock(lock: &file_priv->fbs_lock); | 
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| 111 | count = 0; | 
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| 112 | fb_id = u64_to_user_ptr(card_res->fb_id_ptr); | 
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| 113 | list_for_each_entry(fb, &file_priv->fbs, filp_head) { | 
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| 114 | if (count < card_res->count_fbs && | 
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| 115 | put_user(fb->base.id, fb_id + count)) { | 
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| 116 | mutex_unlock(lock: &file_priv->fbs_lock); | 
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| 117 | return -EFAULT; | 
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| 118 | } | 
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| 119 | count++; | 
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| 120 | } | 
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| 121 | card_res->count_fbs = count; | 
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| 122 | mutex_unlock(lock: &file_priv->fbs_lock); | 
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| 123 |  | 
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| 124 | card_res->max_height = dev->mode_config.max_height; | 
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| 125 | card_res->min_height = dev->mode_config.min_height; | 
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| 126 | card_res->max_width = dev->mode_config.max_width; | 
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| 127 | card_res->min_width = dev->mode_config.min_width; | 
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| 128 |  | 
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| 129 | count = 0; | 
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| 130 | crtc_id = u64_to_user_ptr(card_res->crtc_id_ptr); | 
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| 131 | drm_for_each_crtc(crtc, dev) { | 
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| 132 | if (drm_lease_held(file_priv, id: crtc->base.id)) { | 
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| 133 | if (count < card_res->count_crtcs && | 
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| 134 | put_user(crtc->base.id, crtc_id + count)) | 
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| 135 | return -EFAULT; | 
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| 136 | count++; | 
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| 137 | } | 
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| 138 | } | 
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| 139 | card_res->count_crtcs = count; | 
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| 140 |  | 
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| 141 | count = 0; | 
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| 142 | encoder_id = u64_to_user_ptr(card_res->encoder_id_ptr); | 
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| 143 | drm_for_each_encoder(encoder, dev) { | 
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| 144 | if (count < card_res->count_encoders && | 
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| 145 | put_user(encoder->base.id, encoder_id + count)) | 
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| 146 | return -EFAULT; | 
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| 147 | count++; | 
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| 148 | } | 
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| 149 | card_res->count_encoders = count; | 
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| 150 |  | 
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| 151 | drm_connector_list_iter_begin(dev, iter: &conn_iter); | 
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| 152 | count = 0; | 
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| 153 | connector_id = u64_to_user_ptr(card_res->connector_id_ptr); | 
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| 154 | /* | 
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| 155 | * FIXME: the connectors on the list may not be fully initialized yet, | 
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| 156 | * if the ioctl is called before the connectors are registered. (See | 
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| 157 | * drm_dev_register()->drm_modeset_register_all() for static and | 
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| 158 | * drm_connector_dynamic_register() for dynamic connectors.) | 
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| 159 | * The driver should only get registered after static connectors are | 
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| 160 | * fully initialized and dynamic connectors should be added to the | 
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| 161 | * connector list only after fully initializing them. | 
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| 162 | */ | 
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| 163 | drm_for_each_connector_iter(connector, &conn_iter) { | 
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| 164 | /* only expose writeback connectors if userspace understands them */ | 
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| 165 | if (!file_priv->writeback_connectors && | 
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| 166 | (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)) | 
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| 167 | continue; | 
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| 168 |  | 
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| 169 | if (drm_lease_held(file_priv, id: connector->base.id)) { | 
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| 170 | if (count < card_res->count_connectors && | 
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| 171 | put_user(connector->base.id, connector_id + count)) { | 
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| 172 | drm_connector_list_iter_end(iter: &conn_iter); | 
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| 173 | return -EFAULT; | 
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| 174 | } | 
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| 175 | count++; | 
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| 176 | } | 
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| 177 | } | 
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| 178 | card_res->count_connectors = count; | 
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| 179 | drm_connector_list_iter_end(iter: &conn_iter); | 
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| 180 |  | 
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| 181 | return ret; | 
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| 182 | } | 
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| 183 |  | 
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| 184 | /** | 
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| 185 | * drm_mode_config_reset - call ->reset callbacks | 
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| 186 | * @dev: drm device | 
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| 187 | * | 
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| 188 | * This functions calls all the crtc's, encoder's and connector's ->reset | 
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| 189 | * callback. Drivers can use this in e.g. their driver load or resume code to | 
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| 190 | * reset hardware and software state. | 
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| 191 | */ | 
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| 192 | void drm_mode_config_reset(struct drm_device *dev) | 
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| 193 | { | 
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| 194 | struct drm_crtc *crtc; | 
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| 195 | struct drm_plane *plane; | 
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| 196 | struct drm_encoder *encoder; | 
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| 197 | struct drm_connector *connector; | 
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| 198 | struct drm_connector_list_iter conn_iter; | 
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| 199 |  | 
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| 200 | drm_for_each_plane(plane, dev) | 
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| 201 | if (plane->funcs->reset) | 
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| 202 | plane->funcs->reset(plane); | 
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| 203 |  | 
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| 204 | drm_for_each_crtc(crtc, dev) | 
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| 205 | if (crtc->funcs->reset) | 
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| 206 | crtc->funcs->reset(crtc); | 
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| 207 |  | 
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| 208 | drm_for_each_encoder(encoder, dev) | 
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| 209 | if (encoder->funcs && encoder->funcs->reset) | 
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| 210 | encoder->funcs->reset(encoder); | 
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| 211 |  | 
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| 212 | drm_connector_list_iter_begin(dev, iter: &conn_iter); | 
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| 213 | drm_for_each_connector_iter(connector, &conn_iter) | 
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| 214 | if (connector->funcs->reset) | 
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| 215 | connector->funcs->reset(connector); | 
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| 216 | drm_connector_list_iter_end(iter: &conn_iter); | 
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| 217 | } | 
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| 218 | EXPORT_SYMBOL(drm_mode_config_reset); | 
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| 219 |  | 
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| 220 | /* | 
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| 221 | * Global properties | 
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| 222 | */ | 
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| 223 | static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { | 
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| 224 | { DRM_PLANE_TYPE_OVERLAY, "Overlay"}, | 
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| 225 | { .type: DRM_PLANE_TYPE_PRIMARY, .name: "Primary"}, | 
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| 226 | { .type: DRM_PLANE_TYPE_CURSOR, .name: "Cursor"}, | 
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| 227 | }; | 
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| 228 |  | 
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| 229 | static int drm_mode_create_standard_properties(struct drm_device *dev) | 
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| 230 | { | 
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| 231 | struct drm_property *prop; | 
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| 232 | int ret; | 
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| 233 |  | 
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| 234 | ret = drm_connector_create_standard_properties(dev); | 
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| 235 | if (ret) | 
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| 236 | return ret; | 
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| 237 |  | 
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| 238 | prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, | 
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| 239 | name: "type", props: drm_plane_type_enum_list, | 
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| 240 | ARRAY_SIZE(drm_plane_type_enum_list)); | 
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| 241 | if (!prop) | 
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| 242 | return -ENOMEM; | 
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| 243 | dev->mode_config.plane_type_property = prop; | 
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| 244 |  | 
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| 245 | prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, | 
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| 246 | name: "SRC_X", min: 0, UINT_MAX); | 
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| 247 | if (!prop) | 
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| 248 | return -ENOMEM; | 
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| 249 | dev->mode_config.prop_src_x = prop; | 
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| 250 |  | 
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| 251 | prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, | 
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| 252 | name: "SRC_Y", min: 0, UINT_MAX); | 
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| 253 | if (!prop) | 
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| 254 | return -ENOMEM; | 
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| 255 | dev->mode_config.prop_src_y = prop; | 
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| 256 |  | 
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| 257 | prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, | 
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| 258 | name: "SRC_W", min: 0, UINT_MAX); | 
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| 259 | if (!prop) | 
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| 260 | return -ENOMEM; | 
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| 261 | dev->mode_config.prop_src_w = prop; | 
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| 262 |  | 
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| 263 | prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, | 
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| 264 | name: "SRC_H", min: 0, UINT_MAX); | 
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| 265 | if (!prop) | 
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| 266 | return -ENOMEM; | 
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| 267 | dev->mode_config.prop_src_h = prop; | 
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| 268 |  | 
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| 269 | prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, | 
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| 270 | name: "CRTC_X", INT_MIN, INT_MAX); | 
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| 271 | if (!prop) | 
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| 272 | return -ENOMEM; | 
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| 273 | dev->mode_config.prop_crtc_x = prop; | 
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| 274 |  | 
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| 275 | prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, | 
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| 276 | name: "CRTC_Y", INT_MIN, INT_MAX); | 
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| 277 | if (!prop) | 
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| 278 | return -ENOMEM; | 
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| 279 | dev->mode_config.prop_crtc_y = prop; | 
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| 280 |  | 
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| 281 | prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, | 
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| 282 | name: "CRTC_W", min: 0, INT_MAX); | 
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| 283 | if (!prop) | 
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| 284 | return -ENOMEM; | 
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| 285 | dev->mode_config.prop_crtc_w = prop; | 
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| 286 |  | 
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| 287 | prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, | 
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| 288 | name: "CRTC_H", min: 0, INT_MAX); | 
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| 289 | if (!prop) | 
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| 290 | return -ENOMEM; | 
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| 291 | dev->mode_config.prop_crtc_h = prop; | 
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| 292 |  | 
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| 293 | prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, | 
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| 294 | name: "FB_ID", DRM_MODE_OBJECT_FB); | 
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| 295 | if (!prop) | 
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| 296 | return -ENOMEM; | 
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| 297 | dev->mode_config.prop_fb_id = prop; | 
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| 298 |  | 
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| 299 | prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, | 
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| 300 | name: "IN_FENCE_FD", min: -1, INT_MAX); | 
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| 301 | if (!prop) | 
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| 302 | return -ENOMEM; | 
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| 303 | dev->mode_config.prop_in_fence_fd = prop; | 
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| 304 |  | 
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| 305 | prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, | 
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| 306 | name: "OUT_FENCE_PTR", min: 0, U64_MAX); | 
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| 307 | if (!prop) | 
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| 308 | return -ENOMEM; | 
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| 309 | dev->mode_config.prop_out_fence_ptr = prop; | 
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| 310 |  | 
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| 311 | prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, | 
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| 312 | name: "CRTC_ID", DRM_MODE_OBJECT_CRTC); | 
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| 313 | if (!prop) | 
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| 314 | return -ENOMEM; | 
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| 315 | dev->mode_config.prop_crtc_id = prop; | 
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| 316 |  | 
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| 317 | prop = drm_property_create(dev, | 
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| 318 | DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, | 
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| 319 | name: "FB_DAMAGE_CLIPS", num_values: 0); | 
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| 320 | if (!prop) | 
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| 321 | return -ENOMEM; | 
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| 322 | dev->mode_config.prop_fb_damage_clips = prop; | 
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| 323 |  | 
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| 324 | prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, | 
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| 325 | name: "ACTIVE"); | 
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| 326 | if (!prop) | 
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| 327 | return -ENOMEM; | 
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| 328 | dev->mode_config.prop_active = prop; | 
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| 329 |  | 
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| 330 | prop = drm_property_create(dev, | 
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| 331 | DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, | 
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| 332 | name: "MODE_ID", num_values: 0); | 
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| 333 | if (!prop) | 
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| 334 | return -ENOMEM; | 
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| 335 | dev->mode_config.prop_mode_id = prop; | 
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| 336 |  | 
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| 337 | prop = drm_property_create_bool(dev, flags: 0, | 
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| 338 | name: "VRR_ENABLED"); | 
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| 339 | if (!prop) | 
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| 340 | return -ENOMEM; | 
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| 341 | dev->mode_config.prop_vrr_enabled = prop; | 
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| 342 |  | 
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| 343 | prop = drm_property_create(dev, | 
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| 344 | DRM_MODE_PROP_BLOB, | 
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| 345 | name: "DEGAMMA_LUT", num_values: 0); | 
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| 346 | if (!prop) | 
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| 347 | return -ENOMEM; | 
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| 348 | dev->mode_config.degamma_lut_property = prop; | 
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| 349 |  | 
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| 350 | prop = drm_property_create_range(dev, | 
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| 351 | DRM_MODE_PROP_IMMUTABLE, | 
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| 352 | name: "DEGAMMA_LUT_SIZE", min: 0, UINT_MAX); | 
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| 353 | if (!prop) | 
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| 354 | return -ENOMEM; | 
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| 355 | dev->mode_config.degamma_lut_size_property = prop; | 
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| 356 |  | 
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| 357 | prop = drm_property_create(dev, | 
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| 358 | DRM_MODE_PROP_BLOB, | 
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| 359 | name: "CTM", num_values: 0); | 
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| 360 | if (!prop) | 
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| 361 | return -ENOMEM; | 
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| 362 | dev->mode_config.ctm_property = prop; | 
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| 363 |  | 
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| 364 | prop = drm_property_create(dev, | 
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| 365 | DRM_MODE_PROP_BLOB, | 
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| 366 | name: "GAMMA_LUT", num_values: 0); | 
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| 367 | if (!prop) | 
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| 368 | return -ENOMEM; | 
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| 369 | dev->mode_config.gamma_lut_property = prop; | 
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| 370 |  | 
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| 371 | prop = drm_property_create_range(dev, | 
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| 372 | DRM_MODE_PROP_IMMUTABLE, | 
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| 373 | name: "GAMMA_LUT_SIZE", min: 0, UINT_MAX); | 
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| 374 | if (!prop) | 
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| 375 | return -ENOMEM; | 
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| 376 | dev->mode_config.gamma_lut_size_property = prop; | 
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| 377 |  | 
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| 378 | prop = drm_property_create(dev, | 
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| 379 | DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, | 
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| 380 | name: "IN_FORMATS", num_values: 0); | 
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| 381 | if (!prop) | 
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| 382 | return -ENOMEM; | 
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| 383 | dev->mode_config.modifiers_property = prop; | 
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| 384 |  | 
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| 385 | prop = drm_property_create(dev, | 
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| 386 | DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, | 
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| 387 | name: "IN_FORMATS_ASYNC", num_values: 0); | 
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| 388 | if (!prop) | 
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| 389 | return -ENOMEM; | 
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| 390 | dev->mode_config.async_modifiers_property = prop; | 
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| 391 |  | 
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| 392 | prop = drm_property_create(dev, | 
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| 393 | DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, | 
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| 394 | name: "SIZE_HINTS", num_values: 0); | 
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| 395 | if (!prop) | 
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| 396 | return -ENOMEM; | 
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| 397 | dev->mode_config.size_hints_property = prop; | 
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| 398 |  | 
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| 399 | return 0; | 
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| 400 | } | 
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| 401 |  | 
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| 402 | static void drm_mode_config_init_release(struct drm_device *dev, void *ptr) | 
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| 403 | { | 
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| 404 | drm_mode_config_cleanup(dev); | 
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| 405 | } | 
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| 406 |  | 
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| 407 | /** | 
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| 408 | * drmm_mode_config_init - managed DRM mode_configuration structure | 
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| 409 | * 	initialization | 
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| 410 | * @dev: DRM device | 
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| 411 | * | 
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| 412 | * Initialize @dev's mode_config structure, used for tracking the graphics | 
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| 413 | * configuration of @dev. | 
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| 414 | * | 
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| 415 | * Since this initializes the modeset locks, no locking is possible. Which is no | 
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| 416 | * problem, since this should happen single threaded at init time. It is the | 
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| 417 | * driver's problem to ensure this guarantee. | 
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| 418 | * | 
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| 419 | * Cleanup is automatically handled through registering drm_mode_config_cleanup | 
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| 420 | * with drmm_add_action(). | 
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| 421 | * | 
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| 422 | * Returns: 0 on success, negative error value on failure. | 
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| 423 | */ | 
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| 424 | int drmm_mode_config_init(struct drm_device *dev) | 
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| 425 | { | 
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| 426 | int ret; | 
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| 427 |  | 
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| 428 | mutex_init(&dev->mode_config.mutex); | 
|---|
| 429 | drm_modeset_lock_init(lock: &dev->mode_config.connection_mutex); | 
|---|
| 430 | mutex_init(&dev->mode_config.idr_mutex); | 
|---|
| 431 | mutex_init(&dev->mode_config.fb_lock); | 
|---|
| 432 | mutex_init(&dev->mode_config.blob_lock); | 
|---|
| 433 | INIT_LIST_HEAD(list: &dev->mode_config.fb_list); | 
|---|
| 434 | INIT_LIST_HEAD(list: &dev->mode_config.crtc_list); | 
|---|
| 435 | INIT_LIST_HEAD(list: &dev->mode_config.connector_list); | 
|---|
| 436 | INIT_LIST_HEAD(list: &dev->mode_config.encoder_list); | 
|---|
| 437 | INIT_LIST_HEAD(list: &dev->mode_config.property_list); | 
|---|
| 438 | INIT_LIST_HEAD(list: &dev->mode_config.property_blob_list); | 
|---|
| 439 | INIT_LIST_HEAD(list: &dev->mode_config.plane_list); | 
|---|
| 440 | INIT_LIST_HEAD(list: &dev->mode_config.privobj_list); | 
|---|
| 441 | idr_init_base(idr: &dev->mode_config.object_idr, base: 1); | 
|---|
| 442 | idr_init_base(idr: &dev->mode_config.tile_idr, base: 1); | 
|---|
| 443 | ida_init(ida: &dev->mode_config.connector_ida); | 
|---|
| 444 | spin_lock_init(&dev->mode_config.connector_list_lock); | 
|---|
| 445 |  | 
|---|
| 446 | init_llist_head(list: &dev->mode_config.connector_free_list); | 
|---|
| 447 | INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn); | 
|---|
| 448 |  | 
|---|
| 449 | ret = drm_mode_create_standard_properties(dev); | 
|---|
| 450 | if (ret) { | 
|---|
| 451 | drm_mode_config_cleanup(dev); | 
|---|
| 452 | return ret; | 
|---|
| 453 | } | 
|---|
| 454 |  | 
|---|
| 455 | /* Just to be sure */ | 
|---|
| 456 | dev->mode_config.num_fb = 0; | 
|---|
| 457 | dev->mode_config.num_connector = 0; | 
|---|
| 458 | dev->mode_config.num_crtc = 0; | 
|---|
| 459 | dev->mode_config.num_encoder = 0; | 
|---|
| 460 | dev->mode_config.num_total_plane = 0; | 
|---|
| 461 |  | 
|---|
| 462 | if (IS_ENABLED(CONFIG_LOCKDEP)) { | 
|---|
| 463 | struct drm_modeset_acquire_ctx modeset_ctx; | 
|---|
| 464 | struct ww_acquire_ctx resv_ctx; | 
|---|
| 465 | struct dma_resv resv; | 
|---|
| 466 | int ret; | 
|---|
| 467 |  | 
|---|
| 468 | dma_resv_init(obj: &resv); | 
|---|
| 469 |  | 
|---|
| 470 | drm_modeset_acquire_init(ctx: &modeset_ctx, flags: 0); | 
|---|
| 471 | ret = drm_modeset_lock(lock: &dev->mode_config.connection_mutex, | 
|---|
| 472 | ctx: &modeset_ctx); | 
|---|
| 473 | if (ret == -EDEADLK) | 
|---|
| 474 | ret = drm_modeset_backoff(ctx: &modeset_ctx); | 
|---|
| 475 |  | 
|---|
| 476 | might_fault(); | 
|---|
| 477 |  | 
|---|
| 478 | ww_acquire_init(ctx: &resv_ctx, ww_class: &reservation_ww_class); | 
|---|
| 479 | ret = dma_resv_lock(obj: &resv, ctx: &resv_ctx); | 
|---|
| 480 | if (ret == -EDEADLK) | 
|---|
| 481 | dma_resv_lock_slow(obj: &resv, ctx: &resv_ctx); | 
|---|
| 482 |  | 
|---|
| 483 | dma_resv_unlock(obj: &resv); | 
|---|
| 484 | ww_acquire_fini(ctx: &resv_ctx); | 
|---|
| 485 |  | 
|---|
| 486 | drm_modeset_drop_locks(ctx: &modeset_ctx); | 
|---|
| 487 | drm_modeset_acquire_fini(ctx: &modeset_ctx); | 
|---|
| 488 | dma_resv_fini(obj: &resv); | 
|---|
| 489 | } | 
|---|
| 490 |  | 
|---|
| 491 | return drmm_add_action_or_reset(dev, drm_mode_config_init_release, | 
|---|
| 492 | NULL); | 
|---|
| 493 | } | 
|---|
| 494 | EXPORT_SYMBOL(drmm_mode_config_init); | 
|---|
| 495 |  | 
|---|
| 496 | /** | 
|---|
| 497 | * drm_mode_config_cleanup - free up DRM mode_config info | 
|---|
| 498 | * @dev: DRM device | 
|---|
| 499 | * | 
|---|
| 500 | * Free up all the connectors and CRTCs associated with this DRM device, then | 
|---|
| 501 | * free up the framebuffers and associated buffer objects. | 
|---|
| 502 | * | 
|---|
| 503 | * Note that since this /should/ happen single-threaded at driver/device | 
|---|
| 504 | * teardown time, no locking is required. It's the driver's job to ensure that | 
|---|
| 505 | * this guarantee actually holds true. | 
|---|
| 506 | * | 
|---|
| 507 | * FIXME: With the managed drmm_mode_config_init() it is no longer necessary for | 
|---|
| 508 | * drivers to explicitly call this function. | 
|---|
| 509 | */ | 
|---|
| 510 | void drm_mode_config_cleanup(struct drm_device *dev) | 
|---|
| 511 | { | 
|---|
| 512 | struct drm_connector *connector; | 
|---|
| 513 | struct drm_connector_list_iter conn_iter; | 
|---|
| 514 | struct drm_crtc *crtc, *ct; | 
|---|
| 515 | struct drm_encoder *encoder, *enct; | 
|---|
| 516 | struct drm_framebuffer *fb, *fbt; | 
|---|
| 517 | struct drm_property *property, *pt; | 
|---|
| 518 | struct drm_property_blob *blob, *bt; | 
|---|
| 519 | struct drm_plane *plane, *plt; | 
|---|
| 520 |  | 
|---|
| 521 | list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, | 
|---|
| 522 | head) { | 
|---|
| 523 | encoder->funcs->destroy(encoder); | 
|---|
| 524 | } | 
|---|
| 525 |  | 
|---|
| 526 | drm_connector_list_iter_begin(dev, iter: &conn_iter); | 
|---|
| 527 | drm_for_each_connector_iter(connector, &conn_iter) { | 
|---|
| 528 | /* drm_connector_list_iter holds an full reference to the | 
|---|
| 529 | * current connector itself, which means it is inherently safe | 
|---|
| 530 | * against unreferencing the current connector - but not against | 
|---|
| 531 | * deleting it right away. */ | 
|---|
| 532 | drm_connector_put(connector); | 
|---|
| 533 | } | 
|---|
| 534 | drm_connector_list_iter_end(iter: &conn_iter); | 
|---|
| 535 | /* connector_iter drops references in a work item. */ | 
|---|
| 536 | flush_work(work: &dev->mode_config.connector_free_work); | 
|---|
| 537 | if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) { | 
|---|
| 538 | drm_connector_list_iter_begin(dev, iter: &conn_iter); | 
|---|
| 539 | drm_for_each_connector_iter(connector, &conn_iter) | 
|---|
| 540 | DRM_ERROR( "connector %s leaked!\n", connector->name); | 
|---|
| 541 | drm_connector_list_iter_end(iter: &conn_iter); | 
|---|
| 542 | } | 
|---|
| 543 |  | 
|---|
| 544 | list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, | 
|---|
| 545 | head) { | 
|---|
| 546 | drm_property_destroy(dev, property); | 
|---|
| 547 | } | 
|---|
| 548 |  | 
|---|
| 549 | list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, | 
|---|
| 550 | head) { | 
|---|
| 551 | plane->funcs->destroy(plane); | 
|---|
| 552 | } | 
|---|
| 553 |  | 
|---|
| 554 | list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { | 
|---|
| 555 | crtc->funcs->destroy(crtc); | 
|---|
| 556 | } | 
|---|
| 557 |  | 
|---|
| 558 | list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, | 
|---|
| 559 | head_global) { | 
|---|
| 560 | drm_property_blob_put(blob); | 
|---|
| 561 | } | 
|---|
| 562 |  | 
|---|
| 563 | /* | 
|---|
| 564 | * Single-threaded teardown context, so it's not required to grab the | 
|---|
| 565 | * fb_lock to protect against concurrent fb_list access. Contrary, it | 
|---|
| 566 | * would actually deadlock with the drm_framebuffer_cleanup function. | 
|---|
| 567 | * | 
|---|
| 568 | * Also, if there are any framebuffers left, that's a driver leak now, | 
|---|
| 569 | * so politely WARN about this. | 
|---|
| 570 | */ | 
|---|
| 571 | WARN_ON(!list_empty(&dev->mode_config.fb_list)); | 
|---|
| 572 | list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { | 
|---|
| 573 | struct drm_printer p = drm_dbg_printer(drm: dev, category: DRM_UT_KMS, prefix: "[leaked fb]"); | 
|---|
| 574 |  | 
|---|
| 575 | drm_printf(p: &p, f: "framebuffer[%u]:\n", fb->base.id); | 
|---|
| 576 | drm_framebuffer_print_info(p: &p, indent: 1, fb); | 
|---|
| 577 | drm_framebuffer_free(kref: &fb->base.refcount); | 
|---|
| 578 | } | 
|---|
| 579 |  | 
|---|
| 580 | ida_destroy(ida: &dev->mode_config.connector_ida); | 
|---|
| 581 | idr_destroy(&dev->mode_config.tile_idr); | 
|---|
| 582 | idr_destroy(&dev->mode_config.object_idr); | 
|---|
| 583 | drm_modeset_lock_fini(lock: &dev->mode_config.connection_mutex); | 
|---|
| 584 | } | 
|---|
| 585 | EXPORT_SYMBOL(drm_mode_config_cleanup); | 
|---|
| 586 |  | 
|---|
| 587 | static u32 full_encoder_mask(struct drm_device *dev) | 
|---|
| 588 | { | 
|---|
| 589 | struct drm_encoder *encoder; | 
|---|
| 590 | u32 encoder_mask = 0; | 
|---|
| 591 |  | 
|---|
| 592 | drm_for_each_encoder(encoder, dev) | 
|---|
| 593 | encoder_mask |= drm_encoder_mask(encoder); | 
|---|
| 594 |  | 
|---|
| 595 | return encoder_mask; | 
|---|
| 596 | } | 
|---|
| 597 |  | 
|---|
| 598 | /* | 
|---|
| 599 | * For some reason we want the encoder itself included in | 
|---|
| 600 | * possible_clones. Make life easy for drivers by allowing them | 
|---|
| 601 | * to leave possible_clones unset if no cloning is possible. | 
|---|
| 602 | */ | 
|---|
| 603 | static void fixup_encoder_possible_clones(struct drm_encoder *encoder) | 
|---|
| 604 | { | 
|---|
| 605 | if (encoder->possible_clones == 0) | 
|---|
| 606 | encoder->possible_clones = drm_encoder_mask(encoder); | 
|---|
| 607 | } | 
|---|
| 608 |  | 
|---|
| 609 | static void validate_encoder_possible_clones(struct drm_encoder *encoder) | 
|---|
| 610 | { | 
|---|
| 611 | struct drm_device *dev = encoder->dev; | 
|---|
| 612 | u32 encoder_mask = full_encoder_mask(dev); | 
|---|
| 613 | struct drm_encoder *other; | 
|---|
| 614 |  | 
|---|
| 615 | drm_for_each_encoder(other, dev) { | 
|---|
| 616 | WARN(!!(encoder->possible_clones & drm_encoder_mask(other)) != | 
|---|
| 617 | !!(other->possible_clones & drm_encoder_mask(encoder)), | 
|---|
| 618 | "possible_clones mismatch: " | 
|---|
| 619 | "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x vs. " | 
|---|
| 620 | "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x\n", | 
|---|
| 621 | encoder->base.id, encoder->name, | 
|---|
| 622 | drm_encoder_mask(encoder), encoder->possible_clones, | 
|---|
| 623 | other->base.id, other->name, | 
|---|
| 624 | drm_encoder_mask(other), other->possible_clones); | 
|---|
| 625 | } | 
|---|
| 626 |  | 
|---|
| 627 | WARN((encoder->possible_clones & drm_encoder_mask(encoder)) == 0 || | 
|---|
| 628 | (encoder->possible_clones & ~encoder_mask) != 0, | 
|---|
| 629 | "Bogus possible_clones: " | 
|---|
| 630 | "[ENCODER:%d:%s] possible_clones=0x%x (full encoder mask=0x%x)\n", | 
|---|
| 631 | encoder->base.id, encoder->name, | 
|---|
| 632 | encoder->possible_clones, encoder_mask); | 
|---|
| 633 | } | 
|---|
| 634 |  | 
|---|
| 635 | static u32 full_crtc_mask(struct drm_device *dev) | 
|---|
| 636 | { | 
|---|
| 637 | struct drm_crtc *crtc; | 
|---|
| 638 | u32 crtc_mask = 0; | 
|---|
| 639 |  | 
|---|
| 640 | drm_for_each_crtc(crtc, dev) | 
|---|
| 641 | crtc_mask |= drm_crtc_mask(crtc); | 
|---|
| 642 |  | 
|---|
| 643 | return crtc_mask; | 
|---|
| 644 | } | 
|---|
| 645 |  | 
|---|
| 646 | static void validate_encoder_possible_crtcs(struct drm_encoder *encoder) | 
|---|
| 647 | { | 
|---|
| 648 | u32 crtc_mask = full_crtc_mask(dev: encoder->dev); | 
|---|
| 649 |  | 
|---|
| 650 | WARN((encoder->possible_crtcs & crtc_mask) == 0 || | 
|---|
| 651 | (encoder->possible_crtcs & ~crtc_mask) != 0, | 
|---|
| 652 | "Bogus possible_crtcs: " | 
|---|
| 653 | "[ENCODER:%d:%s] possible_crtcs=0x%x (full crtc mask=0x%x)\n", | 
|---|
| 654 | encoder->base.id, encoder->name, | 
|---|
| 655 | encoder->possible_crtcs, crtc_mask); | 
|---|
| 656 | } | 
|---|
| 657 |  | 
|---|
| 658 | void drm_mode_config_validate(struct drm_device *dev) | 
|---|
| 659 | { | 
|---|
| 660 | struct drm_encoder *encoder; | 
|---|
| 661 | struct drm_crtc *crtc; | 
|---|
| 662 | struct drm_plane *plane; | 
|---|
| 663 | u32 primary_with_crtc = 0, cursor_with_crtc = 0; | 
|---|
| 664 | unsigned int num_primary = 0; | 
|---|
| 665 |  | 
|---|
| 666 | if (!drm_core_check_feature(dev, feature: DRIVER_MODESET)) | 
|---|
| 667 | return; | 
|---|
| 668 |  | 
|---|
| 669 | drm_for_each_encoder(encoder, dev) | 
|---|
| 670 | fixup_encoder_possible_clones(encoder); | 
|---|
| 671 |  | 
|---|
| 672 | drm_for_each_encoder(encoder, dev) { | 
|---|
| 673 | validate_encoder_possible_clones(encoder); | 
|---|
| 674 | validate_encoder_possible_crtcs(encoder); | 
|---|
| 675 | } | 
|---|
| 676 |  | 
|---|
| 677 | drm_for_each_crtc(crtc, dev) { | 
|---|
| 678 | WARN(!crtc->primary, "Missing primary plane on [CRTC:%d:%s]\n", | 
|---|
| 679 | crtc->base.id, crtc->name); | 
|---|
| 680 |  | 
|---|
| 681 | WARN(crtc->cursor && crtc->funcs->cursor_set, | 
|---|
| 682 | "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set func", | 
|---|
| 683 | crtc->base.id, crtc->name); | 
|---|
| 684 | WARN(crtc->cursor && crtc->funcs->cursor_set2, | 
|---|
| 685 | "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set2 func", | 
|---|
| 686 | crtc->base.id, crtc->name); | 
|---|
| 687 | WARN(crtc->cursor && crtc->funcs->cursor_move, | 
|---|
| 688 | "[CRTC:%d:%s] must not have both a cursor plane and a cursor_move func", | 
|---|
| 689 | crtc->base.id, crtc->name); | 
|---|
| 690 |  | 
|---|
| 691 | if (crtc->primary) { | 
|---|
| 692 | WARN(!(crtc->primary->possible_crtcs & drm_crtc_mask(crtc)), | 
|---|
| 693 | "Bogus primary plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n", | 
|---|
| 694 | crtc->primary->base.id, crtc->primary->name, | 
|---|
| 695 | crtc->base.id, crtc->name); | 
|---|
| 696 | WARN(primary_with_crtc & drm_plane_mask(crtc->primary), | 
|---|
| 697 | "Primary plane [PLANE:%d:%s] used for multiple CRTCs", | 
|---|
| 698 | crtc->primary->base.id, crtc->primary->name); | 
|---|
| 699 | primary_with_crtc |= drm_plane_mask(plane: crtc->primary); | 
|---|
| 700 | } | 
|---|
| 701 | if (crtc->cursor) { | 
|---|
| 702 | WARN(!(crtc->cursor->possible_crtcs & drm_crtc_mask(crtc)), | 
|---|
| 703 | "Bogus cursor plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n", | 
|---|
| 704 | crtc->cursor->base.id, crtc->cursor->name, | 
|---|
| 705 | crtc->base.id, crtc->name); | 
|---|
| 706 | WARN(cursor_with_crtc & drm_plane_mask(crtc->cursor), | 
|---|
| 707 | "Cursor plane [PLANE:%d:%s] used for multiple CRTCs", | 
|---|
| 708 | crtc->cursor->base.id, crtc->cursor->name); | 
|---|
| 709 | cursor_with_crtc |= drm_plane_mask(plane: crtc->cursor); | 
|---|
| 710 | } | 
|---|
| 711 | } | 
|---|
| 712 |  | 
|---|
| 713 | drm_for_each_plane(plane, dev) { | 
|---|
| 714 | if (plane->type == DRM_PLANE_TYPE_PRIMARY) | 
|---|
| 715 | num_primary++; | 
|---|
| 716 | } | 
|---|
| 717 |  | 
|---|
| 718 | WARN(num_primary != dev->mode_config.num_crtc, | 
|---|
| 719 | "Must have as many primary planes as there are CRTCs, but have %u primary planes and %u CRTCs", | 
|---|
| 720 | num_primary, dev->mode_config.num_crtc); | 
|---|
| 721 | } | 
|---|
| 722 |  | 
|---|