1 /* 2 * Copyright (c) 2006-2008 Intel Corporation 3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 4 * Copyright (c) 2008 Red Hat Inc. 5 * 6 * DRM core CRTC related functions 7 * 8 * Permission to use, copy, modify, distribute, and sell this software and its 9 * documentation for any purpose is hereby granted without fee, provided that 10 * the above copyright notice appear in all copies and that both that copyright 11 * notice and this permission notice appear in supporting documentation, and 12 * that the name of the copyright holders not be used in advertising or 13 * publicity pertaining to distribution of the software without specific, 14 * written prior permission. The copyright holders make no representations 15 * about the suitability of this software for any purpose. It is provided "as 16 * is" without express or implied warranty. 17 * 18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 24 * OF THIS SOFTWARE. 25 * 26 * Authors: 27 * Keith Packard 28 * Eric Anholt <eric@anholt.net> 29 * Dave Airlie <airlied@linux.ie> 30 * Jesse Barnes <jesse.barnes@intel.com> 31 */ 32 #include <linux/ctype.h> 33 #include <linux/list.h> 34 #include <linux/slab.h> 35 #include <linux/export.h> 36 #include <linux/dma-fence.h> 37 #include <linux/uaccess.h> 38 #include <drm/drm_crtc.h> 39 #include <drm/drm_edid.h> 40 #include <drm/drm_fourcc.h> 41 #include <drm/drm_modeset_lock.h> 42 #include <drm/drm_atomic.h> 43 #include <drm/drm_auth.h> 44 #include <drm/drm_debugfs_crc.h> 45 #include <drm/drm_drv.h> 46 #include <drm/drm_print.h> 47 #include <drm/drm_file.h> 48 49 #include "drm_crtc_internal.h" 50 #include "drm_internal.h" 51 52 /** 53 * DOC: overview 54 * 55 * A CRTC represents the overall display pipeline. It receives pixel data from 56 * &drm_plane and blends them together. The &drm_display_mode is also attached 57 * to the CRTC, specifying display timings. On the output side the data is fed 58 * to one or more &drm_encoder, which are then each connected to one 59 * &drm_connector. 60 * 61 * To create a CRTC, a KMS drivers allocates and zeroes an instances of 62 * &struct drm_crtc (possibly as part of a larger structure) and registers it 63 * with a call to drm_crtc_init_with_planes(). 64 * 65 * The CRTC is also the entry point for legacy modeset operations, see 66 * &drm_crtc_funcs.set_config, legacy plane operations, see 67 * &drm_crtc_funcs.page_flip and &drm_crtc_funcs.cursor_set2, and other legacy 68 * operations like &drm_crtc_funcs.gamma_set. For atomic drivers all these 69 * features are controlled through &drm_property and 70 * &drm_mode_config_funcs.atomic_check and &drm_mode_config_funcs.atomic_check. 71 */ 72 73 /** 74 * drm_crtc_from_index - find the registered CRTC at an index 75 * @dev: DRM device 76 * @idx: index of registered CRTC to find for 77 * 78 * Given a CRTC index, return the registered CRTC from DRM device's 79 * list of CRTCs with matching index. This is the inverse of drm_crtc_index(). 80 * It's useful in the vblank callbacks (like &drm_driver.enable_vblank or 81 * &drm_driver.disable_vblank), since that still deals with indices instead 82 * of pointers to &struct drm_crtc." 83 */ 84 struct drm_crtc *drm_crtc_from_index(struct drm_device *dev, int idx) 85 { 86 struct drm_crtc *crtc; 87 88 drm_for_each_crtc(crtc, dev) 89 if (idx == crtc->index) 90 return crtc; 91 92 return NULL; 93 } 94 EXPORT_SYMBOL(drm_crtc_from_index); 95 96 int drm_crtc_force_disable(struct drm_crtc *crtc) 97 { 98 struct drm_mode_set set = { 99 .crtc = crtc, 100 }; 101 102 WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev)); 103 104 return drm_mode_set_config_internal(&set); 105 } 106 107 static unsigned int drm_num_crtcs(struct drm_device *dev) 108 { 109 unsigned int num = 0; 110 struct drm_crtc *tmp; 111 112 drm_for_each_crtc(tmp, dev) { 113 num++; 114 } 115 116 return num; 117 } 118 119 int drm_crtc_register_all(struct drm_device *dev) 120 { 121 struct drm_crtc *crtc; 122 int ret = 0; 123 124 drm_for_each_crtc(crtc, dev) { 125 drm_debugfs_crtc_add(crtc); 126 127 if (crtc->funcs->late_register) 128 ret = crtc->funcs->late_register(crtc); 129 if (ret) 130 return ret; 131 } 132 133 return 0; 134 } 135 136 void drm_crtc_unregister_all(struct drm_device *dev) 137 { 138 struct drm_crtc *crtc; 139 140 drm_for_each_crtc(crtc, dev) { 141 if (crtc->funcs->early_unregister) 142 crtc->funcs->early_unregister(crtc); 143 drm_debugfs_crtc_remove(crtc); 144 } 145 } 146 147 static int drm_crtc_crc_init(struct drm_crtc *crtc) 148 { 149 #ifdef CONFIG_DEBUG_FS 150 spin_lock_init(&crtc->crc.lock); 151 init_waitqueue_head(&crtc->crc.wq); 152 crtc->crc.source = kstrdup("auto", GFP_KERNEL); 153 if (!crtc->crc.source) 154 return -ENOMEM; 155 #endif 156 return 0; 157 } 158 159 static void drm_crtc_crc_fini(struct drm_crtc *crtc) 160 { 161 #ifdef CONFIG_DEBUG_FS 162 kfree(crtc->crc.source); 163 #endif 164 } 165 166 static const struct dma_fence_ops drm_crtc_fence_ops; 167 168 static struct drm_crtc *fence_to_crtc(struct dma_fence *fence) 169 { 170 BUG_ON(fence->ops != &drm_crtc_fence_ops); 171 return container_of(fence->lock, struct drm_crtc, fence_lock); 172 } 173 174 static const char *drm_crtc_fence_get_driver_name(struct dma_fence *fence) 175 { 176 struct drm_crtc *crtc = fence_to_crtc(fence); 177 178 return crtc->dev->driver->name; 179 } 180 181 static const char *drm_crtc_fence_get_timeline_name(struct dma_fence *fence) 182 { 183 struct drm_crtc *crtc = fence_to_crtc(fence); 184 185 return crtc->timeline_name; 186 } 187 188 static const struct dma_fence_ops drm_crtc_fence_ops = { 189 .get_driver_name = drm_crtc_fence_get_driver_name, 190 .get_timeline_name = drm_crtc_fence_get_timeline_name, 191 }; 192 193 struct dma_fence *drm_crtc_create_fence(struct drm_crtc *crtc) 194 { 195 struct dma_fence *fence; 196 197 fence = kzalloc(sizeof(*fence), GFP_KERNEL); 198 if (!fence) 199 return NULL; 200 201 dma_fence_init(fence, &drm_crtc_fence_ops, &crtc->fence_lock, 202 crtc->fence_context, ++crtc->fence_seqno); 203 204 return fence; 205 } 206 207 /** 208 * DOC: standard CRTC properties 209 * 210 * DRM CRTCs have a few standardized properties: 211 * 212 * ACTIVE: 213 * Atomic property for setting the power state of the CRTC. When set to 1 214 * the CRTC will actively display content. When set to 0 the CRTC will be 215 * powered off. There is no expectation that user-space will reset CRTC 216 * resources like the mode and planes when setting ACTIVE to 0. 217 * 218 * User-space can rely on an ACTIVE change to 1 to never fail an atomic 219 * test as long as no other property has changed. If a change to ACTIVE 220 * fails an atomic test, this is a driver bug. For this reason setting 221 * ACTIVE to 0 must not release internal resources (like reserved memory 222 * bandwidth or clock generators). 223 * 224 * Note that the legacy DPMS property on connectors is internally routed 225 * to control this property for atomic drivers. 226 * MODE_ID: 227 * Atomic property for setting the CRTC display timings. The value is the 228 * ID of a blob containing the DRM mode info. To disable the CRTC, 229 * user-space must set this property to 0. 230 * 231 * Setting MODE_ID to 0 will release reserved resources for the CRTC. 232 * SCALING_FILTER: 233 * Atomic property for setting the scaling filter for CRTC scaler 234 * 235 * The value of this property can be one of the following: 236 * 237 * Default: 238 * Driver's default scaling filter 239 * Nearest Neighbor: 240 * Nearest Neighbor scaling filter 241 */ 242 243 /** 244 * drm_crtc_init_with_planes - Initialise a new CRTC object with 245 * specified primary and cursor planes. 246 * @dev: DRM device 247 * @crtc: CRTC object to init 248 * @primary: Primary plane for CRTC 249 * @cursor: Cursor plane for CRTC 250 * @funcs: callbacks for the new CRTC 251 * @name: printf style format string for the CRTC name, or NULL for default name 252 * 253 * Inits a new object created as base part of a driver crtc object. Drivers 254 * should use this function instead of drm_crtc_init(), which is only provided 255 * for backwards compatibility with drivers which do not yet support universal 256 * planes). For really simple hardware which has only 1 plane look at 257 * drm_simple_display_pipe_init() instead. 258 * 259 * Returns: 260 * Zero on success, error code on failure. 261 */ 262 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 263 struct drm_plane *primary, 264 struct drm_plane *cursor, 265 const struct drm_crtc_funcs *funcs, 266 const char *name, ...) 267 { 268 struct drm_mode_config *config = &dev->mode_config; 269 int ret; 270 271 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); 272 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); 273 274 /* crtc index is used with 32bit bitmasks */ 275 if (WARN_ON(config->num_crtc >= 32)) 276 return -EINVAL; 277 278 WARN_ON(drm_drv_uses_atomic_modeset(dev) && 279 (!funcs->atomic_destroy_state || 280 !funcs->atomic_duplicate_state)); 281 282 crtc->dev = dev; 283 crtc->funcs = funcs; 284 285 INIT_LIST_HEAD(&crtc->commit_list); 286 spin_lock_init(&crtc->commit_lock); 287 288 drm_modeset_lock_init(&crtc->mutex); 289 ret = drm_mode_object_add(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 290 if (ret) 291 return ret; 292 293 if (name) { 294 va_list ap; 295 296 va_start(ap, name); 297 crtc->name = kvasprintf(GFP_KERNEL, name, ap); 298 va_end(ap); 299 } else { 300 crtc->name = kasprintf(GFP_KERNEL, "crtc-%d", 301 drm_num_crtcs(dev)); 302 } 303 if (!crtc->name) { 304 drm_mode_object_unregister(dev, &crtc->base); 305 return -ENOMEM; 306 } 307 308 crtc->fence_context = dma_fence_context_alloc(1); 309 spin_lock_init(&crtc->fence_lock); 310 snprintf(crtc->timeline_name, sizeof(crtc->timeline_name), 311 "CRTC:%d-%s", crtc->base.id, crtc->name); 312 313 crtc->base.properties = &crtc->properties; 314 315 list_add_tail(&crtc->head, &config->crtc_list); 316 crtc->index = config->num_crtc++; 317 318 crtc->primary = primary; 319 crtc->cursor = cursor; 320 if (primary && !primary->possible_crtcs) 321 primary->possible_crtcs = drm_crtc_mask(crtc); 322 if (cursor && !cursor->possible_crtcs) 323 cursor->possible_crtcs = drm_crtc_mask(crtc); 324 325 ret = drm_crtc_crc_init(crtc); 326 if (ret) { 327 drm_mode_object_unregister(dev, &crtc->base); 328 return ret; 329 } 330 331 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 332 drm_object_attach_property(&crtc->base, config->prop_active, 0); 333 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); 334 drm_object_attach_property(&crtc->base, 335 config->prop_out_fence_ptr, 0); 336 drm_object_attach_property(&crtc->base, 337 config->prop_vrr_enabled, 0); 338 } 339 340 return 0; 341 } 342 EXPORT_SYMBOL(drm_crtc_init_with_planes); 343 344 /** 345 * drm_crtc_cleanup - Clean up the core crtc usage 346 * @crtc: CRTC to cleanup 347 * 348 * This function cleans up @crtc and removes it from the DRM mode setting 349 * core. Note that the function does *not* free the crtc structure itself, 350 * this is the responsibility of the caller. 351 */ 352 void drm_crtc_cleanup(struct drm_crtc *crtc) 353 { 354 struct drm_device *dev = crtc->dev; 355 356 /* Note that the crtc_list is considered to be static; should we 357 * remove the drm_crtc at runtime we would have to decrement all 358 * the indices on the drm_crtc after us in the crtc_list. 359 */ 360 361 drm_crtc_crc_fini(crtc); 362 363 kfree(crtc->gamma_store); 364 crtc->gamma_store = NULL; 365 366 drm_modeset_lock_fini(&crtc->mutex); 367 368 drm_mode_object_unregister(dev, &crtc->base); 369 list_del(&crtc->head); 370 dev->mode_config.num_crtc--; 371 372 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); 373 if (crtc->state && crtc->funcs->atomic_destroy_state) 374 crtc->funcs->atomic_destroy_state(crtc, crtc->state); 375 376 kfree(crtc->name); 377 378 memset(crtc, 0, sizeof(*crtc)); 379 } 380 EXPORT_SYMBOL(drm_crtc_cleanup); 381 382 /** 383 * drm_mode_getcrtc - get CRTC configuration 384 * @dev: drm device for the ioctl 385 * @data: data pointer for the ioctl 386 * @file_priv: drm file for the ioctl call 387 * 388 * Construct a CRTC configuration structure to return to the user. 389 * 390 * Called by the user via ioctl. 391 * 392 * Returns: 393 * Zero on success, negative errno on failure. 394 */ 395 int drm_mode_getcrtc(struct drm_device *dev, 396 void *data, struct drm_file *file_priv) 397 { 398 struct drm_mode_crtc *crtc_resp = data; 399 struct drm_crtc *crtc; 400 struct drm_plane *plane; 401 402 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 403 return -EOPNOTSUPP; 404 405 crtc = drm_crtc_find(dev, file_priv, crtc_resp->crtc_id); 406 if (!crtc) 407 return -ENOENT; 408 409 plane = crtc->primary; 410 411 crtc_resp->gamma_size = crtc->gamma_size; 412 413 drm_modeset_lock(&plane->mutex, NULL); 414 if (plane->state && plane->state->fb) 415 crtc_resp->fb_id = plane->state->fb->base.id; 416 else if (!plane->state && plane->fb) 417 crtc_resp->fb_id = plane->fb->base.id; 418 else 419 crtc_resp->fb_id = 0; 420 421 if (plane->state) { 422 crtc_resp->x = plane->state->src_x >> 16; 423 crtc_resp->y = plane->state->src_y >> 16; 424 } 425 drm_modeset_unlock(&plane->mutex); 426 427 drm_modeset_lock(&crtc->mutex, NULL); 428 if (crtc->state) { 429 if (crtc->state->enable) { 430 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); 431 crtc_resp->mode_valid = 1; 432 } else { 433 crtc_resp->mode_valid = 0; 434 } 435 } else { 436 crtc_resp->x = crtc->x; 437 crtc_resp->y = crtc->y; 438 439 if (crtc->enabled) { 440 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); 441 crtc_resp->mode_valid = 1; 442 443 } else { 444 crtc_resp->mode_valid = 0; 445 } 446 } 447 if (!file_priv->aspect_ratio_allowed) 448 crtc_resp->mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK; 449 drm_modeset_unlock(&crtc->mutex); 450 451 return 0; 452 } 453 454 static int __drm_mode_set_config_internal(struct drm_mode_set *set, 455 struct drm_modeset_acquire_ctx *ctx) 456 { 457 struct drm_crtc *crtc = set->crtc; 458 struct drm_framebuffer *fb; 459 struct drm_crtc *tmp; 460 int ret; 461 462 WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev)); 463 464 /* 465 * NOTE: ->set_config can also disable other crtcs (if we steal all 466 * connectors from it), hence we need to refcount the fbs across all 467 * crtcs. Atomic modeset will have saner semantics ... 468 */ 469 drm_for_each_crtc(tmp, crtc->dev) { 470 struct drm_plane *plane = tmp->primary; 471 472 plane->old_fb = plane->fb; 473 } 474 475 fb = set->fb; 476 477 ret = crtc->funcs->set_config(set, ctx); 478 if (ret == 0) { 479 struct drm_plane *plane = crtc->primary; 480 481 plane->crtc = fb ? crtc : NULL; 482 plane->fb = fb; 483 } 484 485 drm_for_each_crtc(tmp, crtc->dev) { 486 struct drm_plane *plane = tmp->primary; 487 488 if (plane->fb) 489 drm_framebuffer_get(plane->fb); 490 if (plane->old_fb) 491 drm_framebuffer_put(plane->old_fb); 492 plane->old_fb = NULL; 493 } 494 495 return ret; 496 } 497 498 /** 499 * drm_mode_set_config_internal - helper to call &drm_mode_config_funcs.set_config 500 * @set: modeset config to set 501 * 502 * This is a little helper to wrap internal calls to the 503 * &drm_mode_config_funcs.set_config driver interface. The only thing it adds is 504 * correct refcounting dance. 505 * 506 * This should only be used by non-atomic legacy drivers. 507 * 508 * Returns: 509 * Zero on success, negative errno on failure. 510 */ 511 int drm_mode_set_config_internal(struct drm_mode_set *set) 512 { 513 WARN_ON(drm_drv_uses_atomic_modeset(set->crtc->dev)); 514 515 return __drm_mode_set_config_internal(set, NULL); 516 } 517 EXPORT_SYMBOL(drm_mode_set_config_internal); 518 519 /** 520 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 521 * CRTC viewport 522 * @crtc: CRTC that framebuffer will be displayed on 523 * @x: x panning 524 * @y: y panning 525 * @mode: mode that framebuffer will be displayed under 526 * @fb: framebuffer to check size of 527 */ 528 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 529 int x, int y, 530 const struct drm_display_mode *mode, 531 const struct drm_framebuffer *fb) 532 533 { 534 int hdisplay, vdisplay; 535 536 drm_mode_get_hv_timing(mode, &hdisplay, &vdisplay); 537 538 if (crtc->state && 539 drm_rotation_90_or_270(crtc->primary->state->rotation)) 540 swap(hdisplay, vdisplay); 541 542 return drm_framebuffer_check_src_coords(x << 16, y << 16, 543 hdisplay << 16, vdisplay << 16, 544 fb); 545 } 546 EXPORT_SYMBOL(drm_crtc_check_viewport); 547 548 /** 549 * drm_mode_setcrtc - set CRTC configuration 550 * @dev: drm device for the ioctl 551 * @data: data pointer for the ioctl 552 * @file_priv: drm file for the ioctl call 553 * 554 * Build a new CRTC configuration based on user request. 555 * 556 * Called by the user via ioctl. 557 * 558 * Returns: 559 * Zero on success, negative errno on failure. 560 */ 561 int drm_mode_setcrtc(struct drm_device *dev, void *data, 562 struct drm_file *file_priv) 563 { 564 struct drm_mode_config *config = &dev->mode_config; 565 struct drm_mode_crtc *crtc_req = data; 566 struct drm_crtc *crtc; 567 struct drm_plane *plane; 568 struct drm_connector **connector_set = NULL, *connector; 569 struct drm_framebuffer *fb = NULL; 570 struct drm_display_mode *mode = NULL; 571 struct drm_mode_set set; 572 uint32_t __user *set_connectors_ptr; 573 struct drm_modeset_acquire_ctx ctx; 574 int ret; 575 int i; 576 577 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 578 return -EOPNOTSUPP; 579 580 /* 581 * Universal plane src offsets are only 16.16, prevent havoc for 582 * drivers using universal plane code internally. 583 */ 584 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) 585 return -ERANGE; 586 587 crtc = drm_crtc_find(dev, file_priv, crtc_req->crtc_id); 588 if (!crtc) { 589 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 590 return -ENOENT; 591 } 592 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); 593 594 plane = crtc->primary; 595 596 /* allow disabling with the primary plane leased */ 597 if (crtc_req->mode_valid && !drm_lease_held(file_priv, plane->base.id)) 598 return -EACCES; 599 600 DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 601 DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret); 602 603 if (crtc_req->mode_valid) { 604 /* If we have a mode we need a framebuffer. */ 605 /* If we pass -1, set the mode with the currently bound fb */ 606 if (crtc_req->fb_id == -1) { 607 struct drm_framebuffer *old_fb; 608 609 if (plane->state) 610 old_fb = plane->state->fb; 611 else 612 old_fb = plane->fb; 613 614 if (!old_fb) { 615 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 616 ret = -EINVAL; 617 goto out; 618 } 619 620 fb = old_fb; 621 /* Make refcounting symmetric with the lookup path. */ 622 drm_framebuffer_get(fb); 623 } else { 624 fb = drm_framebuffer_lookup(dev, file_priv, crtc_req->fb_id); 625 if (!fb) { 626 DRM_DEBUG_KMS("Unknown FB ID%d\n", 627 crtc_req->fb_id); 628 ret = -ENOENT; 629 goto out; 630 } 631 } 632 633 mode = drm_mode_create(dev); 634 if (!mode) { 635 ret = -ENOMEM; 636 goto out; 637 } 638 if (!file_priv->aspect_ratio_allowed && 639 (crtc_req->mode.flags & DRM_MODE_FLAG_PIC_AR_MASK) != DRM_MODE_FLAG_PIC_AR_NONE) { 640 DRM_DEBUG_KMS("Unexpected aspect-ratio flag bits\n"); 641 ret = -EINVAL; 642 goto out; 643 } 644 645 646 ret = drm_mode_convert_umode(dev, mode, &crtc_req->mode); 647 if (ret) { 648 DRM_DEBUG_KMS("Invalid mode (ret=%d, status=%s)\n", 649 ret, drm_get_mode_status_name(mode->status)); 650 drm_mode_debug_printmodeline(mode); 651 goto out; 652 } 653 654 /* 655 * Check whether the primary plane supports the fb pixel format. 656 * Drivers not implementing the universal planes API use a 657 * default formats list provided by the DRM core which doesn't 658 * match real hardware capabilities. Skip the check in that 659 * case. 660 */ 661 if (!plane->format_default) { 662 ret = drm_plane_check_pixel_format(plane, 663 fb->format->format, 664 fb->modifier); 665 if (ret) { 666 struct drm_format_name_buf format_name; 667 668 DRM_DEBUG_KMS("Invalid pixel format %s, modifier 0x%llx\n", 669 drm_get_format_name(fb->format->format, 670 &format_name), 671 fb->modifier); 672 goto out; 673 } 674 } 675 676 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 677 mode, fb); 678 if (ret) 679 goto out; 680 681 } 682 683 if (crtc_req->count_connectors == 0 && mode) { 684 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 685 ret = -EINVAL; 686 goto out; 687 } 688 689 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 690 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 691 crtc_req->count_connectors); 692 ret = -EINVAL; 693 goto out; 694 } 695 696 if (crtc_req->count_connectors > 0) { 697 u32 out_id; 698 699 /* Avoid unbounded kernel memory allocation */ 700 if (crtc_req->count_connectors > config->num_connector) { 701 ret = -EINVAL; 702 goto out; 703 } 704 705 connector_set = kmalloc_array(crtc_req->count_connectors, 706 sizeof(struct drm_connector *), 707 GFP_KERNEL); 708 if (!connector_set) { 709 ret = -ENOMEM; 710 goto out; 711 } 712 713 for (i = 0; i < crtc_req->count_connectors; i++) { 714 connector_set[i] = NULL; 715 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 716 if (get_user(out_id, &set_connectors_ptr[i])) { 717 ret = -EFAULT; 718 goto out; 719 } 720 721 connector = drm_connector_lookup(dev, file_priv, out_id); 722 if (!connector) { 723 DRM_DEBUG_KMS("Connector id %d unknown\n", 724 out_id); 725 ret = -ENOENT; 726 goto out; 727 } 728 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 729 connector->base.id, 730 connector->name); 731 732 connector_set[i] = connector; 733 } 734 } 735 736 set.crtc = crtc; 737 set.x = crtc_req->x; 738 set.y = crtc_req->y; 739 set.mode = mode; 740 set.connectors = connector_set; 741 set.num_connectors = crtc_req->count_connectors; 742 set.fb = fb; 743 744 if (drm_drv_uses_atomic_modeset(dev)) 745 ret = crtc->funcs->set_config(&set, &ctx); 746 else 747 ret = __drm_mode_set_config_internal(&set, &ctx); 748 749 out: 750 if (fb) 751 drm_framebuffer_put(fb); 752 753 if (connector_set) { 754 for (i = 0; i < crtc_req->count_connectors; i++) { 755 if (connector_set[i]) 756 drm_connector_put(connector_set[i]); 757 } 758 } 759 kfree(connector_set); 760 drm_mode_destroy(dev, mode); 761 762 /* In case we need to retry... */ 763 connector_set = NULL; 764 fb = NULL; 765 mode = NULL; 766 767 DRM_MODESET_LOCK_ALL_END(dev, ctx, ret); 768 769 return ret; 770 } 771 772 int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 773 struct drm_property *property, 774 uint64_t value) 775 { 776 int ret = -EINVAL; 777 struct drm_crtc *crtc = obj_to_crtc(obj); 778 779 if (crtc->funcs->set_property) 780 ret = crtc->funcs->set_property(crtc, property, value); 781 if (!ret) 782 drm_object_property_set_value(obj, property, value); 783 784 return ret; 785 } 786 787 /** 788 * drm_crtc_create_scaling_filter_property - create a new scaling filter 789 * property 790 * 791 * @crtc: drm CRTC 792 * @supported_filters: bitmask of supported scaling filters, must include 793 * BIT(DRM_SCALING_FILTER_DEFAULT). 794 * 795 * This function lets driver to enable the scaling filter property on a given 796 * CRTC. 797 * 798 * RETURNS: 799 * Zero for success or -errno 800 */ 801 int drm_crtc_create_scaling_filter_property(struct drm_crtc *crtc, 802 unsigned int supported_filters) 803 { 804 struct drm_property *prop = 805 drm_create_scaling_filter_prop(crtc->dev, supported_filters); 806 807 if (IS_ERR(prop)) 808 return PTR_ERR(prop); 809 810 drm_object_attach_property(&crtc->base, prop, 811 DRM_SCALING_FILTER_DEFAULT); 812 crtc->scaling_filter_property = prop; 813 814 return 0; 815 } 816 EXPORT_SYMBOL(drm_crtc_create_scaling_filter_property); 817