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 drm_debugfs_late_register(dev); 58 59 return 0; 60 61err_connector: 62 drm_encoder_unregister_all(dev); 63err_encoder: 64 drm_crtc_unregister_all(dev); 65err_crtc: 66 drm_plane_unregister_all(dev); 67err_plane: 68 return ret; 69} 70 71void 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 */ 93int 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 */ 184void 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} 210EXPORT_SYMBOL(drm_mode_config_reset); 211 212/* 213 * Global properties 214 */ 215static 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 221static 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 380static 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 */ 402int 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} 470EXPORT_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 */ 486void 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} 561EXPORT_SYMBOL(drm_mode_config_cleanup); 562 563static 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 */ 579static 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 585static 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 611static 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 622static 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 634void 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} 698