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