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drm_mode_config.c
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linux-6.19.14/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/export.h> 24#include <linux/uaccess.h> 25 26#include <drm/drm_drv.h> 27#include <drm/drm_encoder.h> 28#include <drm/drm_file.h> 29#include <drm/drm_framebuffer.h> 30#include <drm/drm_managed.h> 31#include <drm/drm_mode_config.h> 32#include <drm/drm_print.h> 33#include <drm/drm_colorop.h> 34#include <linux/dma-resv.h> 35 36#include "drm_crtc_internal.h" 37#include "drm_internal.h" 38 39int drm_modeset_register_all(struct drm_device *dev) 40{ 41 int ret; 42 43 ret = drm_plane_register_all(dev); 44 if (ret) 45 goto err_plane; 46 47 ret = drm_crtc_register_all(dev); 48 if (ret) 49 goto err_crtc; 50 51 ret = drm_encoder_register_all(dev); 52 if (ret) 53 goto err_encoder; 54 55 ret = drm_connector_register_all(dev); 56 if (ret) 57 goto err_connector; 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 /* 156 * FIXME: the connectors on the list may not be fully initialized yet, 157 * if the ioctl is called before the connectors are registered. (See 158 * drm_dev_register()->drm_modeset_register_all() for static and 159 * drm_connector_dynamic_register() for dynamic connectors.) 160 * The driver should only get registered after static connectors are 161 * fully initialized and dynamic connectors should be added to the 162 * connector list only after fully initializing them. 163 */ 164 drm_for_each_connector_iter(connector, &conn_iter) { 165 /* only expose writeback connectors if userspace understands them */ 166 if (!file_priv->writeback_connectors && 167 (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)) 168 continue; 169 170 if (drm_lease_held(file_priv, connector->base.id)) { 171 if (count < card_res->count_connectors && 172 put_user(connector->base.id, connector_id + count)) { 173 drm_connector_list_iter_end(&conn_iter); 174 return -EFAULT; 175 } 176 count++; 177 } 178 } 179 card_res->count_connectors = count; 180 drm_connector_list_iter_end(&conn_iter); 181 182 return ret; 183} 184 185/** 186 * drm_mode_config_reset - call ->reset callbacks 187 * @dev: drm device 188 * 189 * This functions calls all the crtc's, encoder's and connector's ->reset 190 * callback. Drivers can use this in e.g. their driver load or resume code to 191 * reset hardware and software state. 192 */ 193void drm_mode_config_reset(struct drm_device *dev) 194{ 195 struct drm_crtc *crtc; 196 struct drm_colorop *colorop; 197 struct drm_plane *plane; 198 struct drm_encoder *encoder; 199 struct drm_connector *connector; 200 struct drm_connector_list_iter conn_iter; 201 202 drm_for_each_colorop(colorop, dev) 203 drm_colorop_reset(colorop); 204 205 drm_for_each_plane(plane, dev) 206 if (plane->funcs->reset) 207 plane->funcs->reset(plane); 208 209 drm_for_each_crtc(crtc, dev) 210 if (crtc->funcs->reset) 211 crtc->funcs->reset(crtc); 212 213 drm_for_each_encoder(encoder, dev) 214 if (encoder->funcs && encoder->funcs->reset) 215 encoder->funcs->reset(encoder); 216 217 drm_connector_list_iter_begin(dev, &conn_iter); 218 drm_for_each_connector_iter(connector, &conn_iter) 219 if (connector->funcs->reset) 220 connector->funcs->reset(connector); 221 drm_connector_list_iter_end(&conn_iter); 222} 223EXPORT_SYMBOL(drm_mode_config_reset); 224 225/* 226 * Global properties 227 */ 228static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { 229 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 230 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 231 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 232}; 233 234static int drm_mode_create_standard_properties(struct drm_device *dev) 235{ 236 struct drm_property *prop; 237 int ret; 238 239 ret = drm_connector_create_standard_properties(dev); 240 if (ret) 241 return ret; 242 243 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 244 "type", drm_plane_type_enum_list, 245 ARRAY_SIZE(drm_plane_type_enum_list)); 246 if (!prop) 247 return -ENOMEM; 248 dev->mode_config.plane_type_property = prop; 249 250 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 251 "SRC_X", 0, UINT_MAX); 252 if (!prop) 253 return -ENOMEM; 254 dev->mode_config.prop_src_x = prop; 255 256 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 257 "SRC_Y", 0, UINT_MAX); 258 if (!prop) 259 return -ENOMEM; 260 dev->mode_config.prop_src_y = prop; 261 262 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 263 "SRC_W", 0, UINT_MAX); 264 if (!prop) 265 return -ENOMEM; 266 dev->mode_config.prop_src_w = prop; 267 268 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 269 "SRC_H", 0, UINT_MAX); 270 if (!prop) 271 return -ENOMEM; 272 dev->mode_config.prop_src_h = prop; 273 274 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 275 "CRTC_X", INT_MIN, INT_MAX); 276 if (!prop) 277 return -ENOMEM; 278 dev->mode_config.prop_crtc_x = prop; 279 280 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 281 "CRTC_Y", INT_MIN, INT_MAX); 282 if (!prop) 283 return -ENOMEM; 284 dev->mode_config.prop_crtc_y = prop; 285 286 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 287 "CRTC_W", 0, INT_MAX); 288 if (!prop) 289 return -ENOMEM; 290 dev->mode_config.prop_crtc_w = prop; 291 292 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 293 "CRTC_H", 0, INT_MAX); 294 if (!prop) 295 return -ENOMEM; 296 dev->mode_config.prop_crtc_h = prop; 297 298 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 299 "FB_ID", DRM_MODE_OBJECT_FB); 300 if (!prop) 301 return -ENOMEM; 302 dev->mode_config.prop_fb_id = prop; 303 304 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 305 "IN_FENCE_FD", -1, INT_MAX); 306 if (!prop) 307 return -ENOMEM; 308 dev->mode_config.prop_in_fence_fd = prop; 309 310 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 311 "OUT_FENCE_PTR", 0, U64_MAX); 312 if (!prop) 313 return -ENOMEM; 314 dev->mode_config.prop_out_fence_ptr = prop; 315 316 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 317 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 318 if (!prop) 319 return -ENOMEM; 320 dev->mode_config.prop_crtc_id = prop; 321 322 prop = drm_property_create(dev, 323 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 324 "FB_DAMAGE_CLIPS", 0); 325 if (!prop) 326 return -ENOMEM; 327 dev->mode_config.prop_fb_damage_clips = prop; 328 329 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 330 "ACTIVE"); 331 if (!prop) 332 return -ENOMEM; 333 dev->mode_config.prop_active = prop; 334 335 prop = drm_property_create(dev, 336 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 337 "MODE_ID", 0); 338 if (!prop) 339 return -ENOMEM; 340 dev->mode_config.prop_mode_id = prop; 341 342 prop = drm_property_create_bool(dev, 0, 343 "VRR_ENABLED"); 344 if (!prop) 345 return -ENOMEM; 346 dev->mode_config.prop_vrr_enabled = prop; 347 348 prop = drm_property_create(dev, 349 DRM_MODE_PROP_BLOB, 350 "DEGAMMA_LUT", 0); 351 if (!prop) 352 return -ENOMEM; 353 dev->mode_config.degamma_lut_property = prop; 354 355 prop = drm_property_create_range(dev, 356 DRM_MODE_PROP_IMMUTABLE, 357 "DEGAMMA_LUT_SIZE", 0, UINT_MAX); 358 if (!prop) 359 return -ENOMEM; 360 dev->mode_config.degamma_lut_size_property = prop; 361 362 prop = drm_property_create(dev, 363 DRM_MODE_PROP_BLOB, 364 "CTM", 0); 365 if (!prop) 366 return -ENOMEM; 367 dev->mode_config.ctm_property = prop; 368 369 prop = drm_property_create(dev, 370 DRM_MODE_PROP_BLOB, 371 "GAMMA_LUT", 0); 372 if (!prop) 373 return -ENOMEM; 374 dev->mode_config.gamma_lut_property = prop; 375 376 prop = drm_property_create_range(dev, 377 DRM_MODE_PROP_IMMUTABLE, 378 "GAMMA_LUT_SIZE", 0, UINT_MAX); 379 if (!prop) 380 return -ENOMEM; 381 dev->mode_config.gamma_lut_size_property = prop; 382 383 prop = drm_property_create(dev, 384 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, 385 "IN_FORMATS", 0); 386 if (!prop) 387 return -ENOMEM; 388 dev->mode_config.modifiers_property = prop; 389 390 prop = drm_property_create(dev, 391 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, 392 "IN_FORMATS_ASYNC", 0); 393 if (!prop) 394 return -ENOMEM; 395 dev->mode_config.async_modifiers_property = prop; 396 397 prop = drm_property_create(dev, 398 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, 399 "SIZE_HINTS", 0); 400 if (!prop) 401 return -ENOMEM; 402 dev->mode_config.size_hints_property = prop; 403 404 return 0; 405} 406 407static void drm_mode_config_init_release(struct drm_device *dev, void *ptr) 408{ 409 drm_mode_config_cleanup(dev); 410} 411 412/** 413 * drmm_mode_config_init - managed DRM mode_configuration structure 414 * initialization 415 * @dev: DRM device 416 * 417 * Initialize @dev's mode_config structure, used for tracking the graphics 418 * configuration of @dev. 419 * 420 * Since this initializes the modeset locks, no locking is possible. Which is no 421 * problem, since this should happen single threaded at init time. It is the 422 * driver's problem to ensure this guarantee. 423 * 424 * Cleanup is automatically handled through registering drm_mode_config_cleanup 425 * with drmm_add_action(). 426 * 427 * Returns: 0 on success, negative error value on failure. 428 */ 429int drmm_mode_config_init(struct drm_device *dev) 430{ 431 int ret; 432 433 mutex_init(&dev->mode_config.mutex); 434 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 435 mutex_init(&dev->mode_config.idr_mutex); 436 mutex_init(&dev->mode_config.fb_lock); 437 mutex_init(&dev->mode_config.blob_lock); 438 INIT_LIST_HEAD(&dev->mode_config.fb_list); 439 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 440 INIT_LIST_HEAD(&dev->mode_config.connector_list); 441 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 442 INIT_LIST_HEAD(&dev->mode_config.property_list); 443 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 444 INIT_LIST_HEAD(&dev->mode_config.plane_list); 445 INIT_LIST_HEAD(&dev->mode_config.colorop_list); 446 INIT_LIST_HEAD(&dev->mode_config.privobj_list); 447 idr_init_base(&dev->mode_config.object_idr, 1); 448 idr_init_base(&dev->mode_config.tile_idr, 1); 449 ida_init(&dev->mode_config.connector_ida); 450 spin_lock_init(&dev->mode_config.connector_list_lock); 451 452 init_llist_head(&dev->mode_config.connector_free_list); 453 INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn); 454 455 ret = drm_mode_create_standard_properties(dev); 456 if (ret) { 457 drm_mode_config_cleanup(dev); 458 return ret; 459 } 460 461 /* Just to be sure */ 462 dev->mode_config.num_fb = 0; 463 dev->mode_config.num_connector = 0; 464 dev->mode_config.num_crtc = 0; 465 dev->mode_config.num_encoder = 0; 466 dev->mode_config.num_total_plane = 0; 467 dev->mode_config.num_colorop = 0; 468 469 if (IS_ENABLED(CONFIG_LOCKDEP)) { 470 struct drm_modeset_acquire_ctx modeset_ctx; 471 struct ww_acquire_ctx resv_ctx; 472 struct dma_resv resv; 473 int ret; 474 475 dma_resv_init(&resv); 476 477 drm_modeset_acquire_init(&modeset_ctx, 0); 478 ret = drm_modeset_lock(&dev->mode_config.connection_mutex, 479 &modeset_ctx); 480 if (ret == -EDEADLK) 481 ret = drm_modeset_backoff(&modeset_ctx); 482 483 might_fault(); 484 485 ww_acquire_init(&resv_ctx, &reservation_ww_class); 486 ret = dma_resv_lock(&resv, &resv_ctx); 487 if (ret == -EDEADLK) 488 dma_resv_lock_slow(&resv, &resv_ctx); 489 490 dma_resv_unlock(&resv); 491 ww_acquire_fini(&resv_ctx); 492 493 drm_modeset_drop_locks(&modeset_ctx); 494 drm_modeset_acquire_fini(&modeset_ctx); 495 dma_resv_fini(&resv); 496 } 497 498 return drmm_add_action_or_reset(dev, drm_mode_config_init_release, 499 NULL); 500} 501EXPORT_SYMBOL(drmm_mode_config_init); 502 503/** 504 * drm_mode_config_cleanup - free up DRM mode_config info 505 * @dev: DRM device 506 * 507 * Free up all the connectors and CRTCs associated with this DRM device, then 508 * free up the framebuffers and associated buffer objects. 509 * 510 * Note that since this /should/ happen single-threaded at driver/device 511 * teardown time, no locking is required. It's the driver's job to ensure that 512 * this guarantee actually holds true. 513 * 514 * FIXME: With the managed drmm_mode_config_init() it is no longer necessary for 515 * drivers to explicitly call this function. 516 */ 517void drm_mode_config_cleanup(struct drm_device *dev) 518{ 519 struct drm_connector *connector; 520 struct drm_connector_list_iter conn_iter; 521 struct drm_crtc *crtc, *ct; 522 struct drm_encoder *encoder, *enct; 523 struct drm_framebuffer *fb, *fbt; 524 struct drm_property *property, *pt; 525 struct drm_property_blob *blob, *bt; 526 struct drm_plane *plane, *plt; 527 528 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 529 head) { 530 encoder->funcs->destroy(encoder); 531 } 532 533 drm_connector_list_iter_begin(dev, &conn_iter); 534 drm_for_each_connector_iter(connector, &conn_iter) { 535 /* drm_connector_list_iter holds an full reference to the 536 * current connector itself, which means it is inherently safe 537 * against unreferencing the current connector - but not against 538 * deleting it right away. */ 539 drm_connector_put(connector); 540 } 541 drm_connector_list_iter_end(&conn_iter); 542 /* connector_iter drops references in a work item. */ 543 flush_work(&dev->mode_config.connector_free_work); 544 if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) { 545 drm_connector_list_iter_begin(dev, &conn_iter); 546 drm_for_each_connector_iter(connector, &conn_iter) 547 DRM_ERROR("connector %s leaked!\n", connector->name); 548 drm_connector_list_iter_end(&conn_iter); 549 } 550 551 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 552 head) { 553 drm_property_destroy(dev, property); 554 } 555 556 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 557 head) { 558 plane->funcs->destroy(plane); 559 } 560 561 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 562 crtc->funcs->destroy(crtc); 563 } 564 565 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 566 head_global) { 567 drm_property_blob_put(blob); 568 } 569 570 /* 571 * Single-threaded teardown context, so it's not required to grab the 572 * fb_lock to protect against concurrent fb_list access. Contrary, it 573 * would actually deadlock with the drm_framebuffer_cleanup function. 574 * 575 * Also, if there are any framebuffers left, that's a driver leak now, 576 * so politely WARN about this. 577 */ 578 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 579 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 580 struct drm_printer p = drm_dbg_printer(dev, DRM_UT_KMS, "[leaked fb]"); 581 582 drm_printf(&p, "framebuffer[%u]:\n", fb->base.id); 583 drm_framebuffer_print_info(&p, 1, fb); 584 drm_framebuffer_free(&fb->base.refcount); 585 } 586 587 ida_destroy(&dev->mode_config.connector_ida); 588 idr_destroy(&dev->mode_config.tile_idr); 589 idr_destroy(&dev->mode_config.object_idr); 590 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 591} 592EXPORT_SYMBOL(drm_mode_config_cleanup); 593 594static u32 full_encoder_mask(struct drm_device *dev) 595{ 596 struct drm_encoder *encoder; 597 u32 encoder_mask = 0; 598 599 drm_for_each_encoder(encoder, dev) 600 encoder_mask |= drm_encoder_mask(encoder); 601 602 return encoder_mask; 603} 604 605/* 606 * For some reason we want the encoder itself included in 607 * possible_clones. Make life easy for drivers by allowing them 608 * to leave possible_clones unset if no cloning is possible. 609 */ 610static void fixup_encoder_possible_clones(struct drm_encoder *encoder) 611{ 612 if (encoder->possible_clones == 0) 613 encoder->possible_clones = drm_encoder_mask(encoder); 614} 615 616static void validate_encoder_possible_clones(struct drm_encoder *encoder) 617{ 618 struct drm_device *dev = encoder->dev; 619 u32 encoder_mask = full_encoder_mask(dev); 620 struct drm_encoder *other; 621 622 drm_for_each_encoder(other, dev) { 623 WARN(!!(encoder->possible_clones & drm_encoder_mask(other)) != 624 !!(other->possible_clones & drm_encoder_mask(encoder)), 625 "possible_clones mismatch: " 626 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x vs. " 627 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x\n", 628 encoder->base.id, encoder->name, 629 drm_encoder_mask(encoder), encoder->possible_clones, 630 other->base.id, other->name, 631 drm_encoder_mask(other), other->possible_clones); 632 } 633 634 WARN((encoder->possible_clones & drm_encoder_mask(encoder)) == 0 || 635 (encoder->possible_clones & ~encoder_mask) != 0, 636 "Bogus possible_clones: " 637 "[ENCODER:%d:%s] possible_clones=0x%x (full encoder mask=0x%x)\n", 638 encoder->base.id, encoder->name, 639 encoder->possible_clones, encoder_mask); 640} 641 642static u32 full_crtc_mask(struct drm_device *dev) 643{ 644 struct drm_crtc *crtc; 645 u32 crtc_mask = 0; 646 647 drm_for_each_crtc(crtc, dev) 648 crtc_mask |= drm_crtc_mask(crtc); 649 650 return crtc_mask; 651} 652 653static void validate_encoder_possible_crtcs(struct drm_encoder *encoder) 654{ 655 u32 crtc_mask = full_crtc_mask(encoder->dev); 656 657 WARN((encoder->possible_crtcs & crtc_mask) == 0 || 658 (encoder->possible_crtcs & ~crtc_mask) != 0, 659 "Bogus possible_crtcs: " 660 "[ENCODER:%d:%s] possible_crtcs=0x%x (full crtc mask=0x%x)\n", 661 encoder->base.id, encoder->name, 662 encoder->possible_crtcs, crtc_mask); 663} 664 665void drm_mode_config_validate(struct drm_device *dev) 666{ 667 struct drm_encoder *encoder; 668 struct drm_crtc *crtc; 669 struct drm_plane *plane; 670 u32 primary_with_crtc = 0, cursor_with_crtc = 0; 671 unsigned int num_primary = 0; 672 673 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 674 return; 675 676 drm_for_each_encoder(encoder, dev) 677 fixup_encoder_possible_clones(encoder); 678 679 drm_for_each_encoder(encoder, dev) { 680 validate_encoder_possible_clones(encoder); 681 validate_encoder_possible_crtcs(encoder); 682 } 683 684 drm_for_each_crtc(crtc, dev) { 685 WARN(!crtc->primary, "Missing primary plane on [CRTC:%d:%s]\n", 686 crtc->base.id, crtc->name); 687 688 WARN(crtc->cursor && crtc->funcs->cursor_set, 689 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set func", 690 crtc->base.id, crtc->name); 691 WARN(crtc->cursor && crtc->funcs->cursor_set2, 692 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set2 func", 693 crtc->base.id, crtc->name); 694 WARN(crtc->cursor && crtc->funcs->cursor_move, 695 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_move func", 696 crtc->base.id, crtc->name); 697 698 if (crtc->primary) { 699 WARN(!(crtc->primary->possible_crtcs & drm_crtc_mask(crtc)), 700 "Bogus primary plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n", 701 crtc->primary->base.id, crtc->primary->name, 702 crtc->base.id, crtc->name); 703 WARN(primary_with_crtc & drm_plane_mask(crtc->primary), 704 "Primary plane [PLANE:%d:%s] used for multiple CRTCs", 705 crtc->primary->base.id, crtc->primary->name); 706 primary_with_crtc |= drm_plane_mask(crtc->primary); 707 } 708 if (crtc->cursor) { 709 WARN(!(crtc->cursor->possible_crtcs & drm_crtc_mask(crtc)), 710 "Bogus cursor plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n", 711 crtc->cursor->base.id, crtc->cursor->name, 712 crtc->base.id, crtc->name); 713 WARN(cursor_with_crtc & drm_plane_mask(crtc->cursor), 714 "Cursor plane [PLANE:%d:%s] used for multiple CRTCs", 715 crtc->cursor->base.id, crtc->cursor->name); 716 cursor_with_crtc |= drm_plane_mask(crtc->cursor); 717 } 718 } 719 720 drm_for_each_plane(plane, dev) { 721 if (plane->type == DRM_PLANE_TYPE_PRIMARY) 722 num_primary++; 723 } 724 725 WARN(num_primary != dev->mode_config.num_crtc, 726 "Must have as many primary planes as there are CRTCs, but have %u primary planes and %u CRTCs", 727 num_primary, dev->mode_config.num_crtc); 728}
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