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 } 703