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 37int 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 59err_connector: 60 drm_encoder_unregister_all(dev); 61err_encoder: 62 drm_crtc_unregister_all(dev); 63err_crtc: 64 drm_plane_unregister_all(dev); 65err_plane: 66 return ret; 67} 68 69void 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 */ 91int 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 */ 182void 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} 208EXPORT_SYMBOL(drm_mode_config_reset); 209 210/* 211 * Global properties 212 */ 213static 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 219static 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 378static 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 */ 400int drmm_mode_config_init(struct drm_device *dev) 401{ 402 int ret; 403 404 mutex_init(&dev->mode_config.mutex); 405 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 406 mutex_init(&dev->mode_config.idr_mutex); 407 mutex_init(&dev->mode_config.fb_lock); 408 mutex_init(&dev->mode_config.blob_lock); 409 INIT_LIST_HEAD(&dev->mode_config.fb_list); 410 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 411 INIT_LIST_HEAD(&dev->mode_config.connector_list); 412 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 413 INIT_LIST_HEAD(&dev->mode_config.property_list); 414 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 415 INIT_LIST_HEAD(&dev->mode_config.plane_list); 416 INIT_LIST_HEAD(&dev->mode_config.privobj_list); 417 idr_init_base(&dev->mode_config.object_idr, 1); 418 idr_init_base(&dev->mode_config.tile_idr, 1); 419 ida_init(&dev->mode_config.connector_ida); 420 spin_lock_init(&dev->mode_config.connector_list_lock); 421 422 init_llist_head(&dev->mode_config.connector_free_list); 423 INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn); 424 425 ret = drm_mode_create_standard_properties(dev); 426 if (ret) { 427 drm_mode_config_cleanup(dev); 428 return ret; 429 } 430 431 /* Just to be sure */ 432 dev->mode_config.num_fb = 0; 433 dev->mode_config.num_connector = 0; 434 dev->mode_config.num_crtc = 0; 435 dev->mode_config.num_encoder = 0; 436 dev->mode_config.num_total_plane = 0; 437 438 if (IS_ENABLED(CONFIG_LOCKDEP)) { 439 struct drm_modeset_acquire_ctx modeset_ctx; 440 struct ww_acquire_ctx resv_ctx; 441 struct dma_resv resv; 442 int ret; 443 444 dma_resv_init(&resv); 445 446 drm_modeset_acquire_init(&modeset_ctx, 0); 447 ret = drm_modeset_lock(&dev->mode_config.connection_mutex, 448 &modeset_ctx); 449 if (ret == -EDEADLK) 450 ret = drm_modeset_backoff(&modeset_ctx); 451 452 ww_acquire_init(&resv_ctx, &reservation_ww_class); 453 ret = dma_resv_lock(&resv, &resv_ctx); 454 if (ret == -EDEADLK) 455 dma_resv_lock_slow(&resv, &resv_ctx); 456 457 dma_resv_unlock(&resv); 458 ww_acquire_fini(&resv_ctx); 459 460 drm_modeset_drop_locks(&modeset_ctx); 461 drm_modeset_acquire_fini(&modeset_ctx); 462 dma_resv_fini(&resv); 463 } 464 465 return drmm_add_action_or_reset(dev, drm_mode_config_init_release, 466 NULL); 467} 468EXPORT_SYMBOL(drmm_mode_config_init); 469 470/** 471 * drm_mode_config_cleanup - free up DRM mode_config info 472 * @dev: DRM device 473 * 474 * Free up all the connectors and CRTCs associated with this DRM device, then 475 * free up the framebuffers and associated buffer objects. 476 * 477 * Note that since this /should/ happen single-threaded at driver/device 478 * teardown time, no locking is required. It's the driver's job to ensure that 479 * this guarantee actually holds true. 480 * 481 * FIXME: With the managed drmm_mode_config_init() it is no longer necessary for 482 * drivers to explicitly call this function. 483 */ 484void drm_mode_config_cleanup(struct drm_device *dev) 485{ 486 struct drm_connector *connector; 487 struct drm_connector_list_iter conn_iter; 488 struct drm_crtc *crtc, *ct; 489 struct drm_encoder *encoder, *enct; 490 struct drm_framebuffer *fb, *fbt; 491 struct drm_property *property, *pt; 492 struct drm_property_blob *blob, *bt; 493 struct drm_plane *plane, *plt; 494 495 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 496 head) { 497 encoder->funcs->destroy(encoder); 498 } 499 500 drm_connector_list_iter_begin(dev, &conn_iter); 501 drm_for_each_connector_iter(connector, &conn_iter) { 502 /* drm_connector_list_iter holds an full reference to the 503 * current connector itself, which means it is inherently safe 504 * against unreferencing the current connector - but not against 505 * deleting it right away. */ 506 drm_connector_put(connector); 507 } 508 drm_connector_list_iter_end(&conn_iter); 509 /* connector_iter drops references in a work item. */ 510 flush_work(&dev->mode_config.connector_free_work); 511 if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) { 512 drm_connector_list_iter_begin(dev, &conn_iter); 513 drm_for_each_connector_iter(connector, &conn_iter) 514 DRM_ERROR("connector %s leaked!\n", connector->name); 515 drm_connector_list_iter_end(&conn_iter); 516 } 517 518 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 519 head) { 520 drm_property_destroy(dev, property); 521 } 522 523 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 524 head) { 525 plane->funcs->destroy(plane); 526 } 527 528 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 529 crtc->funcs->destroy(crtc); 530 } 531 532 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 533 head_global) { 534 drm_property_blob_put(blob); 535 } 536 537 /* 538 * Single-threaded teardown context, so it's not required to grab the 539 * fb_lock to protect against concurrent fb_list access. Contrary, it 540 * would actually deadlock with the drm_framebuffer_cleanup function. 541 * 542 * Also, if there are any framebuffers left, that's a driver leak now, 543 * so politely WARN about this. 544 */ 545 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 546 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 547 struct drm_printer p = drm_dbg_printer(dev, DRM_UT_KMS, "[leaked fb]"); 548 549 drm_printf(&p, "framebuffer[%u]:\n", fb->base.id); 550 drm_framebuffer_print_info(&p, 1, fb); 551 drm_framebuffer_free(&fb->base.refcount); 552 } 553 554 ida_destroy(&dev->mode_config.connector_ida); 555 idr_destroy(&dev->mode_config.tile_idr); 556 idr_destroy(&dev->mode_config.object_idr); 557 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 558} 559EXPORT_SYMBOL(drm_mode_config_cleanup); 560 561static u32 full_encoder_mask(struct drm_device *dev) 562{ 563 struct drm_encoder *encoder; 564 u32 encoder_mask = 0; 565 566 drm_for_each_encoder(encoder, dev) 567 encoder_mask |= drm_encoder_mask(encoder); 568 569 return encoder_mask; 570} 571 572/* 573 * For some reason we want the encoder itself included in 574 * possible_clones. Make life easy for drivers by allowing them 575 * to leave possible_clones unset if no cloning is possible. 576 */ 577static void fixup_encoder_possible_clones(struct drm_encoder *encoder) 578{ 579 if (encoder->possible_clones == 0) 580 encoder->possible_clones = drm_encoder_mask(encoder); 581} 582 583static void validate_encoder_possible_clones(struct drm_encoder *encoder) 584{ 585 struct drm_device *dev = encoder->dev; 586 u32 encoder_mask = full_encoder_mask(dev); 587 struct drm_encoder *other; 588 589 drm_for_each_encoder(other, dev) { 590 WARN(!!(encoder->possible_clones & drm_encoder_mask(other)) != 591 !!(other->possible_clones & drm_encoder_mask(encoder)), 592 "possible_clones mismatch: " 593 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x vs. " 594 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x\n", 595 encoder->base.id, encoder->name, 596 drm_encoder_mask(encoder), encoder->possible_clones, 597 other->base.id, other->name, 598 drm_encoder_mask(other), other->possible_clones); 599 } 600 601 WARN((encoder->possible_clones & drm_encoder_mask(encoder)) == 0 || 602 (encoder->possible_clones & ~encoder_mask) != 0, 603 "Bogus possible_clones: " 604 "[ENCODER:%d:%s] possible_clones=0x%x (full encoder mask=0x%x)\n", 605 encoder->base.id, encoder->name, 606 encoder->possible_clones, encoder_mask); 607} 608 609static u32 full_crtc_mask(struct drm_device *dev) 610{ 611 struct drm_crtc *crtc; 612 u32 crtc_mask = 0; 613 614 drm_for_each_crtc(crtc, dev) 615 crtc_mask |= drm_crtc_mask(crtc); 616 617 return crtc_mask; 618} 619 620static void validate_encoder_possible_crtcs(struct drm_encoder *encoder) 621{ 622 u32 crtc_mask = full_crtc_mask(encoder->dev); 623 624 WARN((encoder->possible_crtcs & crtc_mask) == 0 || 625 (encoder->possible_crtcs & ~crtc_mask) != 0, 626 "Bogus possible_crtcs: " 627 "[ENCODER:%d:%s] possible_crtcs=0x%x (full crtc mask=0x%x)\n", 628 encoder->base.id, encoder->name, 629 encoder->possible_crtcs, crtc_mask); 630} 631 632void drm_mode_config_validate(struct drm_device *dev) 633{ 634 struct drm_encoder *encoder; 635 struct drm_crtc *crtc; 636 struct drm_plane *plane; 637 u32 primary_with_crtc = 0, cursor_with_crtc = 0; 638 unsigned int num_primary = 0; 639 640 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 641 return; 642 643 drm_for_each_encoder(encoder, dev) 644 fixup_encoder_possible_clones(encoder); 645 646 drm_for_each_encoder(encoder, dev) { 647 validate_encoder_possible_clones(encoder); 648 validate_encoder_possible_crtcs(encoder); 649 } 650 651 drm_for_each_crtc(crtc, dev) { 652 WARN(!crtc->primary, "Missing primary plane on [CRTC:%d:%s]\n", 653 crtc->base.id, crtc->name); 654 655 WARN(crtc->cursor && crtc->funcs->cursor_set, 656 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set func", 657 crtc->base.id, crtc->name); 658 WARN(crtc->cursor && crtc->funcs->cursor_set2, 659 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set2 func", 660 crtc->base.id, crtc->name); 661 WARN(crtc->cursor && crtc->funcs->cursor_move, 662 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_move func", 663 crtc->base.id, crtc->name); 664 665 if (crtc->primary) { 666 WARN(!(crtc->primary->possible_crtcs & drm_crtc_mask(crtc)), 667 "Bogus primary plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n", 668 crtc->primary->base.id, crtc->primary->name, 669 crtc->base.id, crtc->name); 670 WARN(primary_with_crtc & drm_plane_mask(crtc->primary), 671 "Primary plane [PLANE:%d:%s] used for multiple CRTCs", 672 crtc->primary->base.id, crtc->primary->name); 673 primary_with_crtc |= drm_plane_mask(crtc->primary); 674 } 675 if (crtc->cursor) { 676 WARN(!(crtc->cursor->possible_crtcs & drm_crtc_mask(crtc)), 677 "Bogus cursor plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n", 678 crtc->cursor->base.id, crtc->cursor->name, 679 crtc->base.id, crtc->name); 680 WARN(cursor_with_crtc & drm_plane_mask(crtc->cursor), 681 "Cursor plane [PLANE:%d:%s] used for multiple CRTCs", 682 crtc->cursor->base.id, crtc->cursor->name); 683 cursor_with_crtc |= drm_plane_mask(crtc->cursor); 684 } 685 } 686 687 drm_for_each_plane(plane, dev) { 688 if (plane->type == DRM_PLANE_TYPE_PRIMARY) 689 num_primary++; 690 } 691 692 WARN(num_primary != dev->mode_config.num_crtc, 693 "Must have as many primary planes as there are CRTCs, but have %u primary planes and %u CRTCs", 694 num_primary, dev->mode_config.num_crtc); 695} 696