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 <linux/dma-resv.h> 34 35 #include "drm_crtc_internal.h" 36 #include "drm_internal.h" 37 38 int drm_modeset_register_all(struct drm_device *dev) 39 { 40 int ret; 41 42 ret = drm_plane_register_all(dev); 43 if (ret) 44 goto err_plane; 45 46 ret = drm_crtc_register_all(dev); 47 if (ret) 48 goto err_crtc; 49 50 ret = drm_encoder_register_all(dev); 51 if (ret) 52 goto err_encoder; 53 54 ret = drm_connector_register_all(dev); 55 if (ret) 56 goto err_connector; 57 58 return 0; 59 60 err_connector: 61 drm_encoder_unregister_all(dev); 62 err_encoder: 63 drm_crtc_unregister_all(dev); 64 err_crtc: 65 drm_plane_unregister_all(dev); 66 err_plane: 67 return ret; 68 } 69 70 void drm_modeset_unregister_all(struct drm_device *dev) 71 { 72 drm_connector_unregister_all(dev); 73 drm_encoder_unregister_all(dev); 74 drm_crtc_unregister_all(dev); 75 drm_plane_unregister_all(dev); 76 } 77 78 /** 79 * drm_mode_getresources - get graphics configuration 80 * @dev: drm device for the ioctl 81 * @data: data pointer for the ioctl 82 * @file_priv: drm file for the ioctl call 83 * 84 * Construct a set of configuration description structures and return 85 * them to the user, including CRTC, connector and framebuffer configuration. 86 * 87 * Called by the user via ioctl. 88 * 89 * Returns: 90 * Zero on success, negative errno on failure. 91 */ 92 int drm_mode_getresources(struct drm_device *dev, void *data, 93 struct drm_file *file_priv) 94 { 95 struct drm_mode_card_res *card_res = data; 96 struct drm_framebuffer *fb; 97 struct drm_connector *connector; 98 struct drm_crtc *crtc; 99 struct drm_encoder *encoder; 100 int count, ret = 0; 101 uint32_t __user *fb_id; 102 uint32_t __user *crtc_id; 103 uint32_t __user *connector_id; 104 uint32_t __user *encoder_id; 105 struct drm_connector_list_iter conn_iter; 106 107 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 108 return -EOPNOTSUPP; 109 110 mutex_lock(&file_priv->fbs_lock); 111 count = 0; 112 fb_id = u64_to_user_ptr(card_res->fb_id_ptr); 113 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 114 if (count < card_res->count_fbs && 115 put_user(fb->base.id, fb_id + count)) { 116 mutex_unlock(&file_priv->fbs_lock); 117 return -EFAULT; 118 } 119 count++; 120 } 121 card_res->count_fbs = count; 122 mutex_unlock(&file_priv->fbs_lock); 123 124 card_res->max_height = dev->mode_config.max_height; 125 card_res->min_height = dev->mode_config.min_height; 126 card_res->max_width = dev->mode_config.max_width; 127 card_res->min_width = dev->mode_config.min_width; 128 129 count = 0; 130 crtc_id = u64_to_user_ptr(card_res->crtc_id_ptr); 131 drm_for_each_crtc(crtc, dev) { 132 if (drm_lease_held(file_priv, crtc->base.id)) { 133 if (count < card_res->count_crtcs && 134 put_user(crtc->base.id, crtc_id + count)) 135 return -EFAULT; 136 count++; 137 } 138 } 139 card_res->count_crtcs = count; 140 141 count = 0; 142 encoder_id = u64_to_user_ptr(card_res->encoder_id_ptr); 143 drm_for_each_encoder(encoder, dev) { 144 if (count < card_res->count_encoders && 145 put_user(encoder->base.id, encoder_id + count)) 146 return -EFAULT; 147 count++; 148 } 149 card_res->count_encoders = count; 150 151 drm_connector_list_iter_begin(dev, &conn_iter); 152 count = 0; 153 connector_id = u64_to_user_ptr(card_res->connector_id_ptr); 154 /* 155 * FIXME: the connectors on the list may not be fully initialized yet, 156 * if the ioctl is called before the connectors are registered. (See 157 * drm_dev_register()->drm_modeset_register_all() for static and 158 * drm_connector_dynamic_register() for dynamic connectors.) 159 * The driver should only get registered after static connectors are 160 * fully initialized and dynamic connectors should be added to the 161 * connector list only after fully initializing them. 162 */ 163 drm_for_each_connector_iter(connector, &conn_iter) { 164 /* only expose writeback connectors if userspace understands them */ 165 if (!file_priv->writeback_connectors && 166 (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)) 167 continue; 168 169 if (drm_lease_held(file_priv, connector->base.id)) { 170 if (count < card_res->count_connectors && 171 put_user(connector->base.id, connector_id + count)) { 172 drm_connector_list_iter_end(&conn_iter); 173 return -EFAULT; 174 } 175 count++; 176 } 177 } 178 card_res->count_connectors = count; 179 drm_connector_list_iter_end(&conn_iter); 180 181 return ret; 182 } 183 184 /** 185 * drm_mode_config_reset - call ->reset callbacks 186 * @dev: drm device 187 * 188 * This functions calls all the crtc's, encoder's and connector's ->reset 189 * callback. Drivers can use this in e.g. their driver load or resume code to 190 * reset hardware and software state. 191 */ 192 void drm_mode_config_reset(struct drm_device *dev) 193 { 194 struct drm_crtc *crtc; 195 struct drm_plane *plane; 196 struct drm_encoder *encoder; 197 struct drm_connector *connector; 198 struct drm_connector_list_iter conn_iter; 199 200 drm_for_each_plane(plane, dev) 201 if (plane->funcs->reset) 202 plane->funcs->reset(plane); 203 204 drm_for_each_crtc(crtc, dev) 205 if (crtc->funcs->reset) 206 crtc->funcs->reset(crtc); 207 208 drm_for_each_encoder(encoder, dev) 209 if (encoder->funcs && encoder->funcs->reset) 210 encoder->funcs->reset(encoder); 211 212 drm_connector_list_iter_begin(dev, &conn_iter); 213 drm_for_each_connector_iter(connector, &conn_iter) 214 if (connector->funcs->reset) 215 connector->funcs->reset(connector); 216 drm_connector_list_iter_end(&conn_iter); 217 } 218 EXPORT_SYMBOL(drm_mode_config_reset); 219 220 /* 221 * Global properties 222 */ 223 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { 224 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 225 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 226 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 227 }; 228 229 static int drm_mode_create_standard_properties(struct drm_device *dev) 230 { 231 struct drm_property *prop; 232 int ret; 233 234 ret = drm_connector_create_standard_properties(dev); 235 if (ret) 236 return ret; 237 238 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 239 "type", drm_plane_type_enum_list, 240 ARRAY_SIZE(drm_plane_type_enum_list)); 241 if (!prop) 242 return -ENOMEM; 243 dev->mode_config.plane_type_property = prop; 244 245 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 246 "SRC_X", 0, UINT_MAX); 247 if (!prop) 248 return -ENOMEM; 249 dev->mode_config.prop_src_x = prop; 250 251 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 252 "SRC_Y", 0, UINT_MAX); 253 if (!prop) 254 return -ENOMEM; 255 dev->mode_config.prop_src_y = prop; 256 257 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 258 "SRC_W", 0, UINT_MAX); 259 if (!prop) 260 return -ENOMEM; 261 dev->mode_config.prop_src_w = prop; 262 263 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 264 "SRC_H", 0, UINT_MAX); 265 if (!prop) 266 return -ENOMEM; 267 dev->mode_config.prop_src_h = prop; 268 269 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 270 "CRTC_X", INT_MIN, INT_MAX); 271 if (!prop) 272 return -ENOMEM; 273 dev->mode_config.prop_crtc_x = prop; 274 275 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 276 "CRTC_Y", INT_MIN, INT_MAX); 277 if (!prop) 278 return -ENOMEM; 279 dev->mode_config.prop_crtc_y = prop; 280 281 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 282 "CRTC_W", 0, INT_MAX); 283 if (!prop) 284 return -ENOMEM; 285 dev->mode_config.prop_crtc_w = prop; 286 287 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 288 "CRTC_H", 0, INT_MAX); 289 if (!prop) 290 return -ENOMEM; 291 dev->mode_config.prop_crtc_h = prop; 292 293 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 294 "FB_ID", DRM_MODE_OBJECT_FB); 295 if (!prop) 296 return -ENOMEM; 297 dev->mode_config.prop_fb_id = prop; 298 299 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 300 "IN_FENCE_FD", -1, INT_MAX); 301 if (!prop) 302 return -ENOMEM; 303 dev->mode_config.prop_in_fence_fd = prop; 304 305 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 306 "OUT_FENCE_PTR", 0, U64_MAX); 307 if (!prop) 308 return -ENOMEM; 309 dev->mode_config.prop_out_fence_ptr = prop; 310 311 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 312 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 313 if (!prop) 314 return -ENOMEM; 315 dev->mode_config.prop_crtc_id = prop; 316 317 prop = drm_property_create(dev, 318 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 319 "FB_DAMAGE_CLIPS", 0); 320 if (!prop) 321 return -ENOMEM; 322 dev->mode_config.prop_fb_damage_clips = prop; 323 324 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 325 "ACTIVE"); 326 if (!prop) 327 return -ENOMEM; 328 dev->mode_config.prop_active = prop; 329 330 prop = drm_property_create(dev, 331 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 332 "MODE_ID", 0); 333 if (!prop) 334 return -ENOMEM; 335 dev->mode_config.prop_mode_id = prop; 336 337 prop = drm_property_create_bool(dev, 0, 338 "VRR_ENABLED"); 339 if (!prop) 340 return -ENOMEM; 341 dev->mode_config.prop_vrr_enabled = prop; 342 343 prop = drm_property_create(dev, 344 DRM_MODE_PROP_BLOB, 345 "DEGAMMA_LUT", 0); 346 if (!prop) 347 return -ENOMEM; 348 dev->mode_config.degamma_lut_property = prop; 349 350 prop = drm_property_create_range(dev, 351 DRM_MODE_PROP_IMMUTABLE, 352 "DEGAMMA_LUT_SIZE", 0, UINT_MAX); 353 if (!prop) 354 return -ENOMEM; 355 dev->mode_config.degamma_lut_size_property = prop; 356 357 prop = drm_property_create(dev, 358 DRM_MODE_PROP_BLOB, 359 "CTM", 0); 360 if (!prop) 361 return -ENOMEM; 362 dev->mode_config.ctm_property = prop; 363 364 prop = drm_property_create(dev, 365 DRM_MODE_PROP_BLOB, 366 "GAMMA_LUT", 0); 367 if (!prop) 368 return -ENOMEM; 369 dev->mode_config.gamma_lut_property = prop; 370 371 prop = drm_property_create_range(dev, 372 DRM_MODE_PROP_IMMUTABLE, 373 "GAMMA_LUT_SIZE", 0, UINT_MAX); 374 if (!prop) 375 return -ENOMEM; 376 dev->mode_config.gamma_lut_size_property = prop; 377 378 prop = drm_property_create(dev, 379 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, 380 "IN_FORMATS", 0); 381 if (!prop) 382 return -ENOMEM; 383 dev->mode_config.modifiers_property = prop; 384 385 prop = drm_property_create(dev, 386 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, 387 "IN_FORMATS_ASYNC", 0); 388 if (!prop) 389 return -ENOMEM; 390 dev->mode_config.async_modifiers_property = prop; 391 392 prop = drm_property_create(dev, 393 DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB, 394 "SIZE_HINTS", 0); 395 if (!prop) 396 return -ENOMEM; 397 dev->mode_config.size_hints_property = prop; 398 399 return 0; 400 } 401 402 static void drm_mode_config_init_release(struct drm_device *dev, void *ptr) 403 { 404 drm_mode_config_cleanup(dev); 405 } 406 407 /** 408 * drmm_mode_config_init - managed DRM mode_configuration structure 409 * initialization 410 * @dev: DRM device 411 * 412 * Initialize @dev's mode_config structure, used for tracking the graphics 413 * configuration of @dev. 414 * 415 * Since this initializes the modeset locks, no locking is possible. Which is no 416 * problem, since this should happen single threaded at init time. It is the 417 * driver's problem to ensure this guarantee. 418 * 419 * Cleanup is automatically handled through registering drm_mode_config_cleanup 420 * with drmm_add_action(). 421 * 422 * Returns: 0 on success, negative error value on failure. 423 */ 424 int drmm_mode_config_init(struct drm_device *dev) 425 { 426 int ret; 427 428 mutex_init(&dev->mode_config.mutex); 429 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 430 mutex_init(&dev->mode_config.idr_mutex); 431 mutex_init(&dev->mode_config.fb_lock); 432 mutex_init(&dev->mode_config.blob_lock); 433 INIT_LIST_HEAD(&dev->mode_config.fb_list); 434 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 435 INIT_LIST_HEAD(&dev->mode_config.connector_list); 436 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 437 INIT_LIST_HEAD(&dev->mode_config.property_list); 438 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 439 INIT_LIST_HEAD(&dev->mode_config.plane_list); 440 INIT_LIST_HEAD(&dev->mode_config.privobj_list); 441 idr_init_base(&dev->mode_config.object_idr, 1); 442 idr_init_base(&dev->mode_config.tile_idr, 1); 443 ida_init(&dev->mode_config.connector_ida); 444 spin_lock_init(&dev->mode_config.connector_list_lock); 445 446 init_llist_head(&dev->mode_config.connector_free_list); 447 INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn); 448 449 ret = drm_mode_create_standard_properties(dev); 450 if (ret) { 451 drm_mode_config_cleanup(dev); 452 return ret; 453 } 454 455 /* Just to be sure */ 456 dev->mode_config.num_fb = 0; 457 dev->mode_config.num_connector = 0; 458 dev->mode_config.num_crtc = 0; 459 dev->mode_config.num_encoder = 0; 460 dev->mode_config.num_total_plane = 0; 461 462 if (IS_ENABLED(CONFIG_LOCKDEP)) { 463 struct drm_modeset_acquire_ctx modeset_ctx; 464 struct ww_acquire_ctx resv_ctx; 465 struct dma_resv resv; 466 int ret; 467 468 dma_resv_init(&resv); 469 470 drm_modeset_acquire_init(&modeset_ctx, 0); 471 ret = drm_modeset_lock(&dev->mode_config.connection_mutex, 472 &modeset_ctx); 473 if (ret == -EDEADLK) 474 ret = drm_modeset_backoff(&modeset_ctx); 475 476 might_fault(); 477 478 ww_acquire_init(&resv_ctx, &reservation_ww_class); 479 ret = dma_resv_lock(&resv, &resv_ctx); 480 if (ret == -EDEADLK) 481 dma_resv_lock_slow(&resv, &resv_ctx); 482 483 dma_resv_unlock(&resv); 484 ww_acquire_fini(&resv_ctx); 485 486 drm_modeset_drop_locks(&modeset_ctx); 487 drm_modeset_acquire_fini(&modeset_ctx); 488 dma_resv_fini(&resv); 489 } 490 491 return drmm_add_action_or_reset(dev, drm_mode_config_init_release, 492 NULL); 493 } 494 EXPORT_SYMBOL(drmm_mode_config_init); 495 496 /** 497 * drm_mode_config_cleanup - free up DRM mode_config info 498 * @dev: DRM device 499 * 500 * Free up all the connectors and CRTCs associated with this DRM device, then 501 * free up the framebuffers and associated buffer objects. 502 * 503 * Note that since this /should/ happen single-threaded at driver/device 504 * teardown time, no locking is required. It's the driver's job to ensure that 505 * this guarantee actually holds true. 506 * 507 * FIXME: With the managed drmm_mode_config_init() it is no longer necessary for 508 * drivers to explicitly call this function. 509 */ 510 void drm_mode_config_cleanup(struct drm_device *dev) 511 { 512 struct drm_connector *connector; 513 struct drm_connector_list_iter conn_iter; 514 struct drm_crtc *crtc, *ct; 515 struct drm_encoder *encoder, *enct; 516 struct drm_framebuffer *fb, *fbt; 517 struct drm_property *property, *pt; 518 struct drm_property_blob *blob, *bt; 519 struct drm_plane *plane, *plt; 520 521 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 522 head) { 523 encoder->funcs->destroy(encoder); 524 } 525 526 drm_connector_list_iter_begin(dev, &conn_iter); 527 drm_for_each_connector_iter(connector, &conn_iter) { 528 /* drm_connector_list_iter holds an full reference to the 529 * current connector itself, which means it is inherently safe 530 * against unreferencing the current connector - but not against 531 * deleting it right away. */ 532 drm_connector_put(connector); 533 } 534 drm_connector_list_iter_end(&conn_iter); 535 /* connector_iter drops references in a work item. */ 536 flush_work(&dev->mode_config.connector_free_work); 537 if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) { 538 drm_connector_list_iter_begin(dev, &conn_iter); 539 drm_for_each_connector_iter(connector, &conn_iter) 540 DRM_ERROR("connector %s leaked!\n", connector->name); 541 drm_connector_list_iter_end(&conn_iter); 542 } 543 544 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 545 head) { 546 drm_property_destroy(dev, property); 547 } 548 549 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 550 head) { 551 plane->funcs->destroy(plane); 552 } 553 554 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 555 crtc->funcs->destroy(crtc); 556 } 557 558 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 559 head_global) { 560 drm_property_blob_put(blob); 561 } 562 563 /* 564 * Single-threaded teardown context, so it's not required to grab the 565 * fb_lock to protect against concurrent fb_list access. Contrary, it 566 * would actually deadlock with the drm_framebuffer_cleanup function. 567 * 568 * Also, if there are any framebuffers left, that's a driver leak now, 569 * so politely WARN about this. 570 */ 571 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 572 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 573 struct drm_printer p = drm_dbg_printer(dev, DRM_UT_KMS, "[leaked fb]"); 574 575 drm_printf(&p, "framebuffer[%u]:\n", fb->base.id); 576 drm_framebuffer_print_info(&p, 1, fb); 577 drm_framebuffer_free(&fb->base.refcount); 578 } 579 580 ida_destroy(&dev->mode_config.connector_ida); 581 idr_destroy(&dev->mode_config.tile_idr); 582 idr_destroy(&dev->mode_config.object_idr); 583 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 584 } 585 EXPORT_SYMBOL(drm_mode_config_cleanup); 586 587 static u32 full_encoder_mask(struct drm_device *dev) 588 { 589 struct drm_encoder *encoder; 590 u32 encoder_mask = 0; 591 592 drm_for_each_encoder(encoder, dev) 593 encoder_mask |= drm_encoder_mask(encoder); 594 595 return encoder_mask; 596 } 597 598 /* 599 * For some reason we want the encoder itself included in 600 * possible_clones. Make life easy for drivers by allowing them 601 * to leave possible_clones unset if no cloning is possible. 602 */ 603 static void fixup_encoder_possible_clones(struct drm_encoder *encoder) 604 { 605 if (encoder->possible_clones == 0) 606 encoder->possible_clones = drm_encoder_mask(encoder); 607 } 608 609 static void validate_encoder_possible_clones(struct drm_encoder *encoder) 610 { 611 struct drm_device *dev = encoder->dev; 612 u32 encoder_mask = full_encoder_mask(dev); 613 struct drm_encoder *other; 614 615 drm_for_each_encoder(other, dev) { 616 WARN(!!(encoder->possible_clones & drm_encoder_mask(other)) != 617 !!(other->possible_clones & drm_encoder_mask(encoder)), 618 "possible_clones mismatch: " 619 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x vs. " 620 "[ENCODER:%d:%s] mask=0x%x possible_clones=0x%x\n", 621 encoder->base.id, encoder->name, 622 drm_encoder_mask(encoder), encoder->possible_clones, 623 other->base.id, other->name, 624 drm_encoder_mask(other), other->possible_clones); 625 } 626 627 WARN((encoder->possible_clones & drm_encoder_mask(encoder)) == 0 || 628 (encoder->possible_clones & ~encoder_mask) != 0, 629 "Bogus possible_clones: " 630 "[ENCODER:%d:%s] possible_clones=0x%x (full encoder mask=0x%x)\n", 631 encoder->base.id, encoder->name, 632 encoder->possible_clones, encoder_mask); 633 } 634 635 static u32 full_crtc_mask(struct drm_device *dev) 636 { 637 struct drm_crtc *crtc; 638 u32 crtc_mask = 0; 639 640 drm_for_each_crtc(crtc, dev) 641 crtc_mask |= drm_crtc_mask(crtc); 642 643 return crtc_mask; 644 } 645 646 static void validate_encoder_possible_crtcs(struct drm_encoder *encoder) 647 { 648 u32 crtc_mask = full_crtc_mask(encoder->dev); 649 650 WARN((encoder->possible_crtcs & crtc_mask) == 0 || 651 (encoder->possible_crtcs & ~crtc_mask) != 0, 652 "Bogus possible_crtcs: " 653 "[ENCODER:%d:%s] possible_crtcs=0x%x (full crtc mask=0x%x)\n", 654 encoder->base.id, encoder->name, 655 encoder->possible_crtcs, crtc_mask); 656 } 657 658 void drm_mode_config_validate(struct drm_device *dev) 659 { 660 struct drm_encoder *encoder; 661 struct drm_crtc *crtc; 662 struct drm_plane *plane; 663 u32 primary_with_crtc = 0, cursor_with_crtc = 0; 664 unsigned int num_primary = 0; 665 666 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 667 return; 668 669 drm_for_each_encoder(encoder, dev) 670 fixup_encoder_possible_clones(encoder); 671 672 drm_for_each_encoder(encoder, dev) { 673 validate_encoder_possible_clones(encoder); 674 validate_encoder_possible_crtcs(encoder); 675 } 676 677 drm_for_each_crtc(crtc, dev) { 678 WARN(!crtc->primary, "Missing primary plane on [CRTC:%d:%s]\n", 679 crtc->base.id, crtc->name); 680 681 WARN(crtc->cursor && crtc->funcs->cursor_set, 682 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set func", 683 crtc->base.id, crtc->name); 684 WARN(crtc->cursor && crtc->funcs->cursor_set2, 685 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_set2 func", 686 crtc->base.id, crtc->name); 687 WARN(crtc->cursor && crtc->funcs->cursor_move, 688 "[CRTC:%d:%s] must not have both a cursor plane and a cursor_move func", 689 crtc->base.id, crtc->name); 690 691 if (crtc->primary) { 692 WARN(!(crtc->primary->possible_crtcs & drm_crtc_mask(crtc)), 693 "Bogus primary plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n", 694 crtc->primary->base.id, crtc->primary->name, 695 crtc->base.id, crtc->name); 696 WARN(primary_with_crtc & drm_plane_mask(crtc->primary), 697 "Primary plane [PLANE:%d:%s] used for multiple CRTCs", 698 crtc->primary->base.id, crtc->primary->name); 699 primary_with_crtc |= drm_plane_mask(crtc->primary); 700 } 701 if (crtc->cursor) { 702 WARN(!(crtc->cursor->possible_crtcs & drm_crtc_mask(crtc)), 703 "Bogus cursor plane possible_crtcs: [PLANE:%d:%s] must be compatible with [CRTC:%d:%s]\n", 704 crtc->cursor->base.id, crtc->cursor->name, 705 crtc->base.id, crtc->name); 706 WARN(cursor_with_crtc & drm_plane_mask(crtc->cursor), 707 "Cursor plane [PLANE:%d:%s] used for multiple CRTCs", 708 crtc->cursor->base.id, crtc->cursor->name); 709 cursor_with_crtc |= drm_plane_mask(crtc->cursor); 710 } 711 } 712 713 drm_for_each_plane(plane, dev) { 714 if (plane->type == DRM_PLANE_TYPE_PRIMARY) 715 num_primary++; 716 } 717 718 WARN(num_primary != dev->mode_config.num_crtc, 719 "Must have as many primary planes as there are CRTCs, but have %u primary planes and %u CRTCs", 720 num_primary, dev->mode_config.num_crtc); 721 } 722