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         return 0;
 376 }
 377
 378 static void drm_mode_config_init_release(struct drm_device *dev, void *ptr)
 379 {
 380         drm_mode_config_cleanup(dev);
 381 }
 382
 383 /**
 384  * drmm_mode_config_init - managed DRM mode_configuration structure
 385  *      initialization
 386  * @dev: DRM device
 387  *
 388  * Initialize @dev's mode_config structure, used for tracking the graphics
 389  * configuration of @dev.
 390  *
 391  * Since this initializes the modeset locks, no locking is possible. Which is no
 392  * problem, since this should happen single threaded at init time. It is the
 393  * driver's problem to ensure this guarantee.
 394  *
 395  * Cleanup is automatically handled through registering drm_mode_config_cleanup
 396  * with drmm_add_action().
 397  *
 398  * Returns: 0 on success, negative error value on failure.
 399  */
 400 int drmm_mode_config_init(struct drm_device *dev)
 401 {
 402         mutex_init(&dev->mode_config.mutex);
 403         drm_modeset_lock_init(&dev->mode_config.connection_mutex);
 404         mutex_init(&dev->mode_config.idr_mutex);
 405         mutex_init(&dev->mode_config.fb_lock);
 406         mutex_init(&dev->mode_config.blob_lock);
 407         INIT_LIST_HEAD(&dev->mode_config.fb_list);
 408         INIT_LIST_HEAD(&dev->mode_config.crtc_list);
 409         INIT_LIST_HEAD(&dev->mode_config.connector_list);
 410         INIT_LIST_HEAD(&dev->mode_config.encoder_list);
 411         INIT_LIST_HEAD(&dev->mode_config.property_list);
 412         INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
 413         INIT_LIST_HEAD(&dev->mode_config.plane_list);
 414         INIT_LIST_HEAD(&dev->mode_config.privobj_list);
 415         idr_init(&dev->mode_config.object_idr);
 416         idr_init(&dev->mode_config.tile_idr);
 417         ida_init(&dev->mode_config.connector_ida);
 418         spin_lock_init(&dev->mode_config.connector_list_lock);
 419
 420         init_llist_head(&dev->mode_config.connector_free_list);
 421         INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn);
 422
 423         drm_mode_create_standard_properties(dev);
 424
 425         /* Just to be sure */
 426         dev->mode_config.num_fb = 0;
 427         dev->mode_config.num_connector = 0;
 428         dev->mode_config.num_crtc = 0;
 429         dev->mode_config.num_encoder = 0;
 430         dev->mode_config.num_total_plane = 0;
 431
 432         if (IS_ENABLED(CONFIG_LOCKDEP)) {
 433                 struct drm_modeset_acquire_ctx modeset_ctx;
 434                 struct ww_acquire_ctx resv_ctx;
 435                 struct dma_resv resv;
 436                 int ret;
 437
 438                 dma_resv_init(&resv);
 439
 440                 drm_modeset_acquire_init(&modeset_ctx, 0);
 441                 ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
 442                                        &modeset_ctx);
 443                 if (ret == -EDEADLK)
 444                         ret = drm_modeset_backoff(&modeset_ctx);
 445
 446                 ww_acquire_init(&resv_ctx, &reservation_ww_class);
 447                 ret = dma_resv_lock(&resv, &resv_ctx);
 448                 if (ret == -EDEADLK)
 449                         dma_resv_lock_slow(&resv, &resv_ctx);
 450
 451                 dma_resv_unlock(&resv);
 452                 ww_acquire_fini(&resv_ctx);
 453
 454                 drm_modeset_drop_locks(&modeset_ctx);
 455                 drm_modeset_acquire_fini(&modeset_ctx);
 456                 dma_resv_fini(&resv);
 457         }
 458
 459         return drmm_add_action_or_reset(dev, drm_mode_config_init_release,
 460                                         NULL);
 461 }
 462 EXPORT_SYMBOL(drmm_mode_config_init);
 463
 464 /**
 465  * drm_mode_config_cleanup - free up DRM mode_config info
 466  * @dev: DRM device
 467  *
 468  * Free up all the connectors and CRTCs associated with this DRM device, then
 469  * free up the framebuffers and associated buffer objects.
 470  *
 471  * Note that since this /should/ happen single-threaded at driver/device
 472  * teardown time, no locking is required. It's the driver's job to ensure that
 473  * this guarantee actually holds true.
 474  *
 475  * FIXME: With the managed drmm_mode_config_init() it is no longer necessary for
 476  * drivers to explicitly call this function.
 477  */
 478 void drm_mode_config_cleanup(struct drm_device *dev)
 479 {
 480         struct drm_connector *connector;
 481         struct drm_connector_list_iter conn_iter;
 482         struct drm_crtc *crtc, *ct;
 483         struct drm_encoder *encoder, *enct;
 484         struct drm_framebuffer *fb, *fbt;
 485         struct drm_property *property, *pt;
 486         struct drm_property_blob *blob, *bt;
 487         struct drm_plane *plane, *plt;
 488
 489         list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
 490                                  head) {
 491                 encoder->funcs->destroy(encoder);
 492         }
 493
 494         drm_connector_list_iter_begin(dev, &conn_iter);
 495         drm_for_each_connector_iter(connector, &conn_iter) {
 496                 /* drm_connector_list_iter holds an full reference to the
 497                  * current connector itself, which means it is inherently safe
 498                  * against unreferencing the current connector - but not against
 499                  * deleting it right away. */
 500                 drm_connector_put(connector);
 501         }
 502         drm_connector_list_iter_end(&conn_iter);
 503         /* connector_iter drops references in a work item. */
 504         flush_work(&dev->mode_config.connector_free_work);
 505         if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) {
 506                 drm_connector_list_iter_begin(dev, &conn_iter);
 507                 drm_for_each_connector_iter(connector, &conn_iter)
 508                         DRM_ERROR("connector %s leaked!\n", connector->name);
 509                 drm_connector_list_iter_end(&conn_iter);
 510         }
 511
 512         list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
 513                                  head) {
 514                 drm_property_destroy(dev, property);
 515         }
 516
 517         list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
 518                                  head) {
 519                 plane->funcs->destroy(plane);
 520         }
 521
 522         list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
 523                 crtc->funcs->destroy(crtc);
 524         }
 525
 526         list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
 527                                  head_global) {
 528                 drm_property_blob_put(blob);
 529         }
 530
 531         /*
 532          * Single-threaded teardown context, so it's not required to grab the
 533          * fb_lock to protect against concurrent fb_list access. Contrary, it
 534          * would actually deadlock with the drm_framebuffer_cleanup function.
 535          *
 536          * Also, if there are any framebuffers left, that's a driver leak now,
 537          * so politely WARN about this.
 538          */
 539         WARN_ON(!list_empty(&dev->mode_config.fb_list));
 540         list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
 541                 struct drm_printer p = drm_debug_printer("[leaked fb]");
 542
 543                 drm_printf(&p, "framebuffer[%u]:\n", fb->base.id);
 544                 drm_framebuffer_print_info(&p, 1, fb);
 545                 drm_framebuffer_free(&fb->base.refcount);
 546         }
 547
 548         ida_destroy(&dev->mode_config.connector_ida);
 549         idr_destroy(&dev->mode_config.tile_idr);
 550         idr_destroy(&dev->mode_config.object_idr);
 551         drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
 552 }
 553 EXPORT_SYMBOL(drm_mode_config_cleanup);
 554
 555 static u32 full_encoder_mask(struct drm_device *dev)
 556 {
 557         struct drm_encoder *encoder;
 558         u32 encoder_mask = 0;
 559
 560         drm_for_each_encoder(encoder, dev)
 561                 encoder_mask |= drm_encoder_mask(encoder);
 562
 563         return encoder_mask;
 564 }
 565
 566 /*
 567  * For some reason we want the encoder itself included in
 568  * possible_clones. Make life easy for drivers by allowing them
 569  * to leave possible_clones unset if no cloning is possible.
 570  */
 571 static void fixup_encoder_possible_clones(struct drm_encoder *encoder)
 572 {
 573         if (encoder->possible_clones == 0)
 574                 encoder->possible_clones = drm_encoder_mask(encoder);
 575 }
 576
 577 static void validate_encoder_possible_clones(struct drm_encoder *encoder)
 578 {
 579         struct drm_device *dev = encoder->dev;
 580         u32 encoder_mask = full_encoder_mask(dev);
 581         struct drm_encoder *other;
 582
 583         drm_for_each_encoder(other, dev) {
 584                 WARN(!!(encoder->possible_clones & drm_encoder_mask(other)) !=
 585                      !!(other->possible_clones & drm_encoder_mask(encoder)),
 586                      "possible_clones mismatch: "
 587                      "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x vs. "
 588                      "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x\n",
 589                      encoder->base.id, encoder->name,
 590                      drm_encoder_mask(encoder), encoder->possible_clones,
 591                      other->base.id, other->name,
 592                      drm_encoder_mask(other), other->possible_clones);
 593         }
 594
 595         WARN((encoder->possible_clones & drm_encoder_mask(encoder)) == 0 ||
 596              (encoder->possible_clones & ~encoder_mask) != 0,
 597              "Bogus possible_clones: "
 598              "[ENCODER:%d:%s] possible_clones=0x%x (full encoder mask=0x%x)\n",
 599              encoder->base.id, encoder->name,
 600              encoder->possible_clones, encoder_mask);
 601 }
 602
 603 static u32 full_crtc_mask(struct drm_device *dev)
 604 {
 605         struct drm_crtc *crtc;
 606         u32 crtc_mask = 0;
 607
 608         drm_for_each_crtc(crtc, dev)
 609                 crtc_mask |= drm_crtc_mask(crtc);
 610
 611         return crtc_mask;
 612 }
 613
 614 static void validate_encoder_possible_crtcs(struct drm_encoder *encoder)
 615 {
 616         u32 crtc_mask = full_crtc_mask(encoder->dev);
 617
 618         WARN((encoder->possible_crtcs & crtc_mask) == 0 ||
 619              (encoder->possible_crtcs & ~crtc_mask) != 0,
 620              "Bogus possible_crtcs: "
 621              "[ENCODER:%d:%s] possible_crtcs=0x%x (full crtc mask=0x%x)\n",
 622              encoder->base.id, encoder->name,
 623              encoder->possible_crtcs, crtc_mask);
 624 }
 625
 626 void drm_mode_config_validate(struct drm_device *dev)
 627 {
 628         struct drm_encoder *encoder;
 629         struct drm_crtc *crtc;
 630         struct drm_plane *plane;
 631         u32 primary_with_crtc = 0, cursor_with_crtc = 0;
 632         unsigned int num_primary = 0;
 633
 634         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 635                 return;
 636
 637         drm_for_each_encoder(encoder, dev)
 638                 fixup_encoder_possible_clones(encoder);
 639
 640         drm_for_each_encoder(encoder, dev) {
 641                 validate_encoder_possible_clones(encoder);
 642                 validate_encoder_possible_crtcs(encoder);
 643         }
 644
 645         drm_for_each_crtc(crtc, dev) {
 646                 WARN(!crtc->primary, "Missing primary plane on [CRTC:%d:%s]\n",
 647                      crtc->base.id, crtc->name);
 648
 649                 WARN(crtc->cursor && crtc->funcs->cursor_set,
 650                      "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set func",
 651                      crtc->base.id, crtc->name);
 652                 WARN(crtc->cursor && crtc->funcs->cursor_set2,
 653                      "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set2 func",
 654                      crtc->base.id, crtc->name);
 655                 WARN(crtc->cursor && crtc->funcs->cursor_move,
 656                      "[CRTC:%d:%s] must not have both a cursor plane and a cursor_move func",
 657                      crtc->base.id, crtc->name);
 658
 659                 if (crtc->primary) {
 660                         WARN(!(crtc->primary->possible_crtcs & drm_crtc_mask(crtc)),
 661                              "Bogus primary plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n",
 662                              crtc->primary->base.id, crtc->primary->name,
 663                              crtc->base.id, crtc->name);
 664                         WARN(primary_with_crtc & drm_plane_mask(crtc->primary),
 665                              "Primary plane [PLANE:%d:%s] used for multiple CRTCs",
 666                              crtc->primary->base.id, crtc->primary->name);
 667                         primary_with_crtc |= drm_plane_mask(crtc->primary);
 668                 }
 669                 if (crtc->cursor) {
 670                         WARN(!(crtc->cursor->possible_crtcs & drm_crtc_mask(crtc)),
 671                              "Bogus cursor plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n",
 672                              crtc->cursor->base.id, crtc->cursor->name,
 673                              crtc->base.id, crtc->name);
 674                         WARN(cursor_with_crtc & drm_plane_mask(crtc->cursor),
 675                              "Cursor plane [PLANE:%d:%s] used for multiple CRTCs",
 676                              crtc->cursor->base.id, crtc->cursor->name);
 677                         cursor_with_crtc |= drm_plane_mask(crtc->cursor);
 678                 }
 679         }
 680
 681         drm_for_each_plane(plane, dev) {
 682                 if (plane->type == DRM_PLANE_TYPE_PRIMARY)
 683                         num_primary++;
 684         }
 685
 686         WARN(num_primary != dev->mode_config.num_crtc,
 687              "Must have as many primary planes as there are CRTCs, but have %u primary planes and %u CRTCs",
 688              num_primary, dev->mode_config.num_crtc);
 689 }