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