drivers/gpu/drm/drm_mode_config.c

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