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 /* 154 * FIXME: the connectors on the list may not be fully initialized yet, 155 * if the ioctl is called before the connectors are registered. (See 156 * drm_dev_register()->drm_modeset_register_all() for static and 157 * drm_connector_dynamic_register() for dynamic connectors.) 158 * The driver should only get registered after static connectors are 159 * fully initialized and dynamic connectors should be added to the 160 * connector list only after fully initializing them. 161 */ 162 drm_for_each_connector_iter(connector, &conn_iter) { 163 /* only expose writeback connectors if userspace understands them */ 164 if (!file_priv->writeback_connectors && 165 (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)) 166 continue; 167 168 if (drm_lease_held(file_priv, connector->base.id)) { 169 if (count < card_res->count_connectors && 170 put_user(connector->base.id, connector_id + count)) { 171 drm_connector_list_iter_end(&conn_iter); 172 return -EFAULT; 173 } 174 count++; 175 } 176 } 177 card_res->count_connectors = count; 178 drm_connector_list_iter_end(&conn_iter); 179 180 return ret; 181 } 182 183 /** 184 * drm_mode_config_reset - call ->reset callbacks 185 * @dev: drm device 186 * 187 * This functions calls all the crtc's, encoder's and connector's ->reset 188 * callback. Drivers can use this in e.g. their driver load or resume code to 189 * reset hardware and software state. 190 */ 191 void drm_mode_config_reset(struct drm_device *dev) 192 { 193 struct drm_crtc *crtc; 194 struct drm_plane *plane; 195 struct drm_encoder *encoder; 196 struct drm_connector *connector; 197 struct drm_connector_list_iter conn_iter; 198 199 drm_for_each_plane(plane, dev) 200 if (plane->funcs->reset) 201 plane->funcs->reset(plane); 202 203 drm_for_each_crtc(crtc, dev) 204 if (crtc->funcs->reset) 205 crtc->funcs->reset(crtc); 206 207 drm_for_each_encoder(encoder, dev) 208 if (encoder->funcs && encoder->funcs->reset) 209 encoder->funcs->reset(encoder); 210 211 drm_connector_list_iter_begin(dev, &conn_iter); 212 drm_for_each_connector_iter(connector, &conn_iter) 213 if (connector->funcs->reset) 214 connector->funcs->reset(connector); 215 drm_connector_list_iter_end(&conn_iter); 216 } 217 EXPORT_SYMBOL(drm_mode_config_reset); 218 219 /* 220 * Global properties 221 */ 222 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { 223 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 224 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 225 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 226 }; 227 228 static int drm_mode_create_standard_properties(struct drm_device *dev) 229 { 230 struct drm_property *prop; 231 int ret; 232 233 ret = drm_connector_create_standard_properties(dev); 234 if (ret) 235 return ret; 236 237 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 238 "type", drm_plane_type_enum_list, 239 ARRAY_SIZE(drm_plane_type_enum_list)); 240 if (!prop) 241 return -ENOMEM; 242 dev->mode_config.plane_type_property = prop; 243 244 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 245 "SRC_X", 0, UINT_MAX); 246 if (!prop) 247 return -ENOMEM; 248 dev->mode_config.prop_src_x = prop; 249 250 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 251 "SRC_Y", 0, UINT_MAX); 252 if (!prop) 253 return -ENOMEM; 254 dev->mode_config.prop_src_y = prop; 255 256 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 257 "SRC_W", 0, UINT_MAX); 258 if (!prop) 259 return -ENOMEM; 260 dev->mode_config.prop_src_w = prop; 261 262 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 263 "SRC_H", 0, UINT_MAX); 264 if (!prop) 265 return -ENOMEM; 266 dev->mode_config.prop_src_h = prop; 267 268 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 269 "CRTC_X", INT_MIN, INT_MAX); 270 if (!prop) 271 return -ENOMEM; 272 dev->mode_config.prop_crtc_x = prop; 273 274 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 275 "CRTC_Y", INT_MIN, INT_MAX); 276 if (!prop) 277 return -ENOMEM; 278 dev->mode_config.prop_crtc_y = prop; 279 280 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 281 "CRTC_W", 0, INT_MAX); 282 if (!prop) 283 return -ENOMEM; 284 dev->mode_config.prop_crtc_w = prop; 285 286 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 287 "CRTC_H", 0, INT_MAX); 288 if (!prop) 289 return -ENOMEM; 290 dev->mode_config.prop_crtc_h = prop; 291 292 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 293 "FB_ID", DRM_MODE_OBJECT_FB); 294 if (!prop) 295 return -ENOMEM; 296 dev->mode_config.prop_fb_id = prop; 297 298 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 299 "IN_FENCE_FD", -1, INT_MAX); 300 if (!prop) 301 return -ENOMEM; 302 dev->mode_config.prop_in_fence_fd = prop; 303 304 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 305 "OUT_FENCE_PTR", 0, U64_MAX); 306 if (!prop) 307 return -ENOMEM; 308 dev->mode_config.prop_out_fence_ptr = prop; 309 310 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 311 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 312 if (!prop) 313 return -ENOMEM; 314 dev->mode_config.prop_crtc_id = prop; 315 316 prop = drm_property_create(dev, 317 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 318 "FB_DAMAGE_CLIPS", 0); 319 if (!prop) 320 return -ENOMEM; 321 dev->mode_config.prop_fb_damage_clips = prop; 322 323 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 324 "ACTIVE"); 325 if (!prop) 326 return -ENOMEM; 327 dev->mode_config.prop_active = prop; 328 329 prop = drm_property_create(dev, 330 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 331 "MODE_ID", 0); 332 if (!prop) 333 return -ENOMEM; 334 dev->mode_config.prop_mode_id = prop; 335 336 prop = drm_property_create_bool(dev, 0, 337 "VRR_ENABLED"); 338 if (!prop) 339 return -ENOMEM; 340 dev->mode_config.prop_vrr_enabled = prop; 341 342 prop = drm_property_create(dev, 343 DRM_MODE_PROP_BLOB, 344 "DEGAMMA_LUT", 0); 345 if (!prop) 346 return -ENOMEM; 347 dev->mode_config.degamma_lut_property = prop; 348 349 prop = drm_property_create_range(dev, 350 DRM_MODE_PROP_IMMUTABLE, 351 "DEGAMMA_LUT_SIZE", 0, UINT_MAX); 352 if (!prop) 353 return -ENOMEM; 354 dev->mode_config.degamma_lut_size_property = prop; 355 356 prop = drm_property_create(dev, 357 DRM_MODE_PROP_BLOB, 358 "CTM", 0); 359 if (!prop) 360 return -ENOMEM; 361 dev->mode_config.ctm_property = prop; 362 363 prop = drm_property_create(dev, 364 DRM_MODE_PROP_BLOB, 365 "GAMMA_LUT", 0); 366 if (!prop) 367 return -ENOMEM; 368 dev->mode_config.gamma_lut_property = prop; 369 370 prop = drm_property_create_range(dev, 371 DRM_MODE_PROP_IMMUTABLE, 372 "GAMMA_LUT_SIZE", 0, UINT_MAX); 373 if (!prop) 374 return -ENOMEM; 375 dev->mode_config.gamma_lut_size_property = prop; 376 377 prop = drm_property_create(dev, 378 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, 379 "IN_FORMATS", 0); 380 if (!prop) 381 return -ENOMEM; 382 dev->mode_config.modifiers_property = prop; 383 384 prop = drm_property_create(dev, 385 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, 386 "IN_FORMATS_ASYNC", 0); 387 if (!prop) 388 return -ENOMEM; 389 dev->mode_config.async_modifiers_property = prop; 390 391 prop = drm_property_create(dev, 392 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, 393 "SIZE_HINTS", 0); 394 if (!prop) 395 return -ENOMEM; 396 dev->mode_config.size_hints_property = prop; 397 398 return 0; 399 } 400 401 static void drm_mode_config_init_release(struct drm_device *dev, void *ptr) 402 { 403 drm_mode_config_cleanup(dev); 404 } 405 406 /** 407 * drmm_mode_config_init - managed DRM mode_configuration structure 408 * initialization 409 * @dev: DRM device 410 * 411 * Initialize @dev's mode_config structure, used for tracking the graphics 412 * configuration of @dev. 413 * 414 * Since this initializes the modeset locks, no locking is possible. Which is no 415 * problem, since this should happen single threaded at init time. It is the 416 * driver's problem to ensure this guarantee. 417 * 418 * Cleanup is automatically handled through registering drm_mode_config_cleanup 419 * with drmm_add_action(). 420 * 421 * Returns: 0 on success, negative error value on failure. 422 */ 423 int drmm_mode_config_init(struct drm_device *dev) 424 { 425 int ret; 426 427 mutex_init(&dev->mode_config.mutex); 428 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 429 mutex_init(&dev->mode_config.idr_mutex); 430 mutex_init(&dev->mode_config.fb_lock); 431 mutex_init(&dev->mode_config.blob_lock); 432 INIT_LIST_HEAD(&dev->mode_config.fb_list); 433 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 434 INIT_LIST_HEAD(&dev->mode_config.connector_list); 435 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 436 INIT_LIST_HEAD(&dev->mode_config.property_list); 437 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 438 INIT_LIST_HEAD(&dev->mode_config.plane_list); 439 INIT_LIST_HEAD(&dev->mode_config.privobj_list); 440 idr_init_base(&dev->mode_config.object_idr, 1); 441 idr_init_base(&dev->mode_config.tile_idr, 1); 442 ida_init(&dev->mode_config.connector_ida); 443 spin_lock_init(&dev->mode_config.connector_list_lock); 444 445 init_llist_head(&dev->mode_config.connector_free_list); 446 INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn); 447 448 ret = drm_mode_create_standard_properties(dev); 449 if (ret) { 450 drm_mode_config_cleanup(dev); 451 return ret; 452 } 453 454 /* Just to be sure */ 455 dev->mode_config.num_fb = 0; 456 dev->mode_config.num_connector = 0; 457 dev->mode_config.num_crtc = 0; 458 dev->mode_config.num_encoder = 0; 459 dev->mode_config.num_total_plane = 0; 460 461 if (IS_ENABLED(CONFIG_LOCKDEP)) { 462 struct drm_modeset_acquire_ctx modeset_ctx; 463 struct ww_acquire_ctx resv_ctx; 464 struct dma_resv resv; 465 int ret; 466 467 dma_resv_init(&resv); 468 469 drm_modeset_acquire_init(&modeset_ctx, 0); 470 ret = drm_modeset_lock(&dev->mode_config.connection_mutex, 471 &modeset_ctx); 472 if (ret == -EDEADLK) 473 ret = drm_modeset_backoff(&modeset_ctx); 474 475 might_fault(); 476 477 ww_acquire_init(&resv_ctx, &reservation_ww_class); 478 ret = dma_resv_lock(&resv, &resv_ctx); 479 if (ret == -EDEADLK) 480 dma_resv_lock_slow(&resv, &resv_ctx); 481 482 dma_resv_unlock(&resv); 483 ww_acquire_fini(&resv_ctx); 484 485 drm_modeset_drop_locks(&modeset_ctx); 486 drm_modeset_acquire_fini(&modeset_ctx); 487 dma_resv_fini(&resv); 488 } 489 490 return drmm_add_action_or_reset(dev, drm_mode_config_init_release, 491 NULL); 492 } 493 EXPORT_SYMBOL(drmm_mode_config_init); 494 495 /** 496 * drm_mode_config_cleanup - free up DRM mode_config info 497 * @dev: DRM device 498 * 499 * Free up all the connectors and CRTCs associated with this DRM device, then 500 * free up the framebuffers and associated buffer objects. 501 * 502 * Note that since this /should/ happen single-threaded at driver/device 503 * teardown time, no locking is required. It's the driver's job to ensure that 504 * this guarantee actually holds true. 505 * 506 * FIXME: With the managed drmm_mode_config_init() it is no longer necessary for 507 * drivers to explicitly call this function. 508 */ 509 void drm_mode_config_cleanup(struct drm_device *dev) 510 { 511 struct drm_connector *connector; 512 struct drm_connector_list_iter conn_iter; 513 struct drm_crtc *crtc, *ct; 514 struct drm_encoder *encoder, *enct; 515 struct drm_framebuffer *fb, *fbt; 516 struct drm_property *property, *pt; 517 struct drm_property_blob *blob, *bt; 518 struct drm_plane *plane, *plt; 519 520 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 521 head) { 522 encoder->funcs->destroy(encoder); 523 } 524 525 drm_connector_list_iter_begin(dev, &conn_iter); 526 drm_for_each_connector_iter(connector, &conn_iter) { 527 /* drm_connector_list_iter holds an full reference to the 528 * current connector itself, which means it is inherently safe 529 * against unreferencing the current connector - but not against 530 * deleting it right away. */ 531 drm_connector_put(connector); 532 } 533 drm_connector_list_iter_end(&conn_iter); 534 /* connector_iter drops references in a work item. */ 535 flush_work(&dev->mode_config.connector_free_work); 536 if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) { 537 drm_connector_list_iter_begin(dev, &conn_iter); 538 drm_for_each_connector_iter(connector, &conn_iter) 539 DRM_ERROR("connector %s leaked!\n", connector->name); 540 drm_connector_list_iter_end(&conn_iter); 541 } 542 543 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 544 head) { 545 drm_property_destroy(dev, property); 546 } 547 548 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 549 head) { 550 plane->funcs->destroy(plane); 551 } 552 553 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 554 crtc->funcs->destroy(crtc); 555 } 556 557 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 558 head_global) { 559 drm_property_blob_put(blob); 560 } 561 562 /* 563 * Single-threaded teardown context, so it's not required to grab the 564 * fb_lock to protect against concurrent fb_list access. Contrary, it 565 * would actually deadlock with the drm_framebuffer_cleanup function. 566 * 567 * Also, if there are any framebuffers left, that's a driver leak now, 568 * so politely WARN about this. 569 */ 570 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 571 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 572 struct drm_printer p = drm_dbg_printer(dev, DRM_UT_KMS, "[leaked fb]"); 573 574 drm_printf(&p, "framebuffer[%u]:\n", fb->base.id); 575 drm_framebuffer_print_info(&p, 1, fb); 576 drm_framebuffer_free(&fb->base.refcount); 577 } 578 579 ida_destroy(&dev->mode_config.connector_ida); 580 idr_destroy(&dev->mode_config.tile_idr); 581 idr_destroy(&dev->mode_config.object_idr); 582 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 583 } 584 EXPORT_SYMBOL(drm_mode_config_cleanup); 585 586 static u32 full_encoder_mask(struct drm_device *dev) 587 { 588 struct drm_encoder *encoder; 589 u32 encoder_mask = 0; 590 591 drm_for_each_encoder(encoder, dev) 592 encoder_mask |= drm_encoder_mask(encoder); 593 594 return encoder_mask; 595 } 596 597 /* 598 * For some reason we want the encoder itself included in 599 * possible_clones. Make life easy for drivers by allowing them 600 * to leave possible_clones unset if no cloning is possible. 601 */ 602 static void fixup_encoder_possible_clones(struct drm_encoder *encoder) 603 { 604 if (encoder->possible_clones == 0) 605 encoder->possible_clones = drm_encoder_mask(encoder); 606 } 607 608 static void validate_encoder_possible_clones(struct drm_encoder *encoder) 609 { 610 struct drm_device *dev = encoder->dev; 611 u32 encoder_mask = full_encoder_mask(dev); 612 struct drm_encoder *other; 613 614 drm_for_each_encoder(other, dev) { 615 WARN(!!(encoder->possible_clones & drm_encoder_mask(other)) != 616 !!(other->possible_clones & drm_encoder_mask(encoder)), 617 "possible_clones mismatch: " 618 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x vs. " 619 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x\n", 620 encoder->base.id, encoder->name, 621 drm_encoder_mask(encoder), encoder->possible_clones, 622 other->base.id, other->name, 623 drm_encoder_mask(other), other->possible_clones); 624 } 625 626 WARN((encoder->possible_clones & drm_encoder_mask(encoder)) == 0 || 627 (encoder->possible_clones & ~encoder_mask) != 0, 628 "Bogus possible_clones: " 629 "[ENCODER:%d:%s] possible_clones=0x%x (full encoder mask=0x%x)\n", 630 encoder->base.id, encoder->name, 631 encoder->possible_clones, encoder_mask); 632 } 633 634 static u32 full_crtc_mask(struct drm_device *dev) 635 { 636 struct drm_crtc *crtc; 637 u32 crtc_mask = 0; 638 639 drm_for_each_crtc(crtc, dev) 640 crtc_mask |= drm_crtc_mask(crtc); 641 642 return crtc_mask; 643 } 644 645 static void validate_encoder_possible_crtcs(struct drm_encoder *encoder) 646 { 647 u32 crtc_mask = full_crtc_mask(encoder->dev); 648 649 WARN((encoder->possible_crtcs & crtc_mask) == 0 || 650 (encoder->possible_crtcs & ~crtc_mask) != 0, 651 "Bogus possible_crtcs: " 652 "[ENCODER:%d:%s] possible_crtcs=0x%x (full crtc mask=0x%x)\n", 653 encoder->base.id, encoder->name, 654 encoder->possible_crtcs, crtc_mask); 655 } 656 657 void drm_mode_config_validate(struct drm_device *dev) 658 { 659 struct drm_encoder *encoder; 660 struct drm_crtc *crtc; 661 struct drm_plane *plane; 662 u32 primary_with_crtc = 0, cursor_with_crtc = 0; 663 unsigned int num_primary = 0; 664 665 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 666 return; 667 668 drm_for_each_encoder(encoder, dev) 669 fixup_encoder_possible_clones(encoder); 670 671 drm_for_each_encoder(encoder, dev) { 672 validate_encoder_possible_clones(encoder); 673 validate_encoder_possible_crtcs(encoder); 674 } 675 676 drm_for_each_crtc(crtc, dev) { 677 WARN(!crtc->primary, "Missing primary plane on [CRTC:%d:%s]\n", 678 crtc->base.id, crtc->name); 679 680 WARN(crtc->cursor && crtc->funcs->cursor_set, 681 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set func", 682 crtc->base.id, crtc->name); 683 WARN(crtc->cursor && crtc->funcs->cursor_set2, 684 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set2 func", 685 crtc->base.id, crtc->name); 686 WARN(crtc->cursor && crtc->funcs->cursor_move, 687 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_move func", 688 crtc->base.id, crtc->name); 689 690 if (crtc->primary) { 691 WARN(!(crtc->primary->possible_crtcs & drm_crtc_mask(crtc)), 692 "Bogus primary plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n", 693 crtc->primary->base.id, crtc->primary->name, 694 crtc->base.id, crtc->name); 695 WARN(primary_with_crtc & drm_plane_mask(crtc->primary), 696 "Primary plane [PLANE:%d:%s] used for multiple CRTCs", 697 crtc->primary->base.id, crtc->primary->name); 698 primary_with_crtc |= drm_plane_mask(crtc->primary); 699 } 700 if (crtc->cursor) { 701 WARN(!(crtc->cursor->possible_crtcs & drm_crtc_mask(crtc)), 702 "Bogus cursor plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n", 703 crtc->cursor->base.id, crtc->cursor->name, 704 crtc->base.id, crtc->name); 705 WARN(cursor_with_crtc & drm_plane_mask(crtc->cursor), 706 "Cursor plane [PLANE:%d:%s] used for multiple CRTCs", 707 crtc->cursor->base.id, crtc->cursor->name); 708 cursor_with_crtc |= drm_plane_mask(crtc->cursor); 709 } 710 } 711 712 drm_for_each_plane(plane, dev) { 713 if (plane->type == DRM_PLANE_TYPE_PRIMARY) 714 num_primary++; 715 } 716 717 WARN(num_primary != dev->mode_config.num_crtc, 718 "Must have as many primary planes as there are CRTCs, but have %u primary planes and %u CRTCs", 719 num_primary, dev->mode_config.num_crtc); 720 } 721