drivers/gpu/drm/drm_crtc.c

   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  */
 233
 234 /**
 235  * drm_crtc_init_with_planes - Initialise a new CRTC object with
 236  *    specified primary and cursor planes.
 237  * @dev: DRM device
 238  * @crtc: CRTC object to init
 239  * @primary: Primary plane for CRTC
 240  * @cursor: Cursor plane for CRTC
 241  * @funcs: callbacks for the new CRTC
 242  * @name: printf style format string for the CRTC name, or NULL for default name
 243  *
 244  * Inits a new object created as base part of a driver crtc object. Drivers
 245  * should use this function instead of drm_crtc_init(), which is only provided
 246  * for backwards compatibility with drivers which do not yet support universal
 247  * planes). For really simple hardware which has only 1 plane look at
 248  * drm_simple_display_pipe_init() instead.
 249  *
 250  * Returns:
 251  * Zero on success, error code on failure.
 252  */
 253 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
 254                               struct drm_plane *primary,
 255                               struct drm_plane *cursor,
 256                               const struct drm_crtc_funcs *funcs,
 257                               const char *name, ...)
 258 {
 259         struct drm_mode_config *config = &dev->mode_config;
 260         int ret;
 261
 262         WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY);
 263         WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR);
 264
 265         /* crtc index is used with 32bit bitmasks */
 266         if (WARN_ON(config->num_crtc >= 32))
 267                 return -EINVAL;
 268
 269         WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
 270                 (!funcs->atomic_destroy_state ||
 271                  !funcs->atomic_duplicate_state));
 272
 273         crtc->dev = dev;
 274         crtc->funcs = funcs;
 275
 276         INIT_LIST_HEAD(&crtc->commit_list);
 277         spin_lock_init(&crtc->commit_lock);
 278
 279         drm_modeset_lock_init(&crtc->mutex);
 280         ret = drm_mode_object_add(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
 281         if (ret)
 282                 return ret;
 283
 284         if (name) {
 285                 va_list ap;
 286
 287                 va_start(ap, name);
 288                 crtc->name = kvasprintf(GFP_KERNEL, name, ap);
 289                 va_end(ap);
 290         } else {
 291                 crtc->name = kasprintf(GFP_KERNEL, "crtc-%d",
 292                                        drm_num_crtcs(dev));
 293         }
 294         if (!crtc->name) {
 295                 drm_mode_object_unregister(dev, &crtc->base);
 296                 return -ENOMEM;
 297         }
 298
 299         crtc->fence_context = dma_fence_context_alloc(1);
 300         spin_lock_init(&crtc->fence_lock);
 301         snprintf(crtc->timeline_name, sizeof(crtc->timeline_name),
 302                  "CRTC:%d-%s", crtc->base.id, crtc->name);
 303
 304         crtc->base.properties = &crtc->properties;
 305
 306         list_add_tail(&crtc->head, &config->crtc_list);
 307         crtc->index = config->num_crtc++;
 308
 309         crtc->primary = primary;
 310         crtc->cursor = cursor;
 311         if (primary && !primary->possible_crtcs)
 312                 primary->possible_crtcs = drm_crtc_mask(crtc);
 313         if (cursor && !cursor->possible_crtcs)
 314                 cursor->possible_crtcs = drm_crtc_mask(crtc);
 315
 316         ret = drm_crtc_crc_init(crtc);
 317         if (ret) {
 318                 drm_mode_object_unregister(dev, &crtc->base);
 319                 return ret;
 320         }
 321
 322         if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
 323                 drm_object_attach_property(&crtc->base, config->prop_active, 0);
 324                 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0);
 325                 drm_object_attach_property(&crtc->base,
 326                                            config->prop_out_fence_ptr, 0);
 327                 drm_object_attach_property(&crtc->base,
 328                                            config->prop_vrr_enabled, 0);
 329         }
 330
 331         return 0;
 332 }
 333 EXPORT_SYMBOL(drm_crtc_init_with_planes);
 334
 335 /**
 336  * drm_crtc_cleanup - Clean up the core crtc usage
 337  * @crtc: CRTC to cleanup
 338  *
 339  * This function cleans up @crtc and removes it from the DRM mode setting
 340  * core. Note that the function does *not* free the crtc structure itself,
 341  * this is the responsibility of the caller.
 342  */
 343 void drm_crtc_cleanup(struct drm_crtc *crtc)
 344 {
 345         struct drm_device *dev = crtc->dev;
 346
 347         /* Note that the crtc_list is considered to be static; should we
 348          * remove the drm_crtc at runtime we would have to decrement all
 349          * the indices on the drm_crtc after us in the crtc_list.
 350          */
 351
 352         drm_crtc_crc_fini(crtc);
 353
 354         kfree(crtc->gamma_store);
 355         crtc->gamma_store = NULL;
 356
 357         drm_modeset_lock_fini(&crtc->mutex);
 358
 359         drm_mode_object_unregister(dev, &crtc->base);
 360         list_del(&crtc->head);
 361         dev->mode_config.num_crtc--;
 362
 363         WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
 364         if (crtc->state && crtc->funcs->atomic_destroy_state)
 365                 crtc->funcs->atomic_destroy_state(crtc, crtc->state);
 366
 367         kfree(crtc->name);
 368
 369         memset(crtc, 0, sizeof(*crtc));
 370 }
 371 EXPORT_SYMBOL(drm_crtc_cleanup);
 372
 373 /**
 374  * drm_mode_getcrtc - get CRTC configuration
 375  * @dev: drm device for the ioctl
 376  * @data: data pointer for the ioctl
 377  * @file_priv: drm file for the ioctl call
 378  *
 379  * Construct a CRTC configuration structure to return to the user.
 380  *
 381  * Called by the user via ioctl.
 382  *
 383  * Returns:
 384  * Zero on success, negative errno on failure.
 385  */
 386 int drm_mode_getcrtc(struct drm_device *dev,
 387                      void *data, struct drm_file *file_priv)
 388 {
 389         struct drm_mode_crtc *crtc_resp = data;
 390         struct drm_crtc *crtc;
 391         struct drm_plane *plane;
 392
 393         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 394                 return -EOPNOTSUPP;
 395
 396         crtc = drm_crtc_find(dev, file_priv, crtc_resp->crtc_id);
 397         if (!crtc)
 398                 return -ENOENT;
 399
 400         plane = crtc->primary;
 401
 402         crtc_resp->gamma_size = crtc->gamma_size;
 403
 404         drm_modeset_lock(&plane->mutex, NULL);
 405         if (plane->state && plane->state->fb)
 406                 crtc_resp->fb_id = plane->state->fb->base.id;
 407         else if (!plane->state && plane->fb)
 408                 crtc_resp->fb_id = plane->fb->base.id;
 409         else
 410                 crtc_resp->fb_id = 0;
 411
 412         if (plane->state) {
 413                 crtc_resp->x = plane->state->src_x >> 16;
 414                 crtc_resp->y = plane->state->src_y >> 16;
 415         }
 416         drm_modeset_unlock(&plane->mutex);
 417
 418         drm_modeset_lock(&crtc->mutex, NULL);
 419         if (crtc->state) {
 420                 if (crtc->state->enable) {
 421                         drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode);
 422                         crtc_resp->mode_valid = 1;
 423                 } else {
 424                         crtc_resp->mode_valid = 0;
 425                 }
 426         } else {
 427                 crtc_resp->x = crtc->x;
 428                 crtc_resp->y = crtc->y;
 429
 430                 if (crtc->enabled) {
 431                         drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode);
 432                         crtc_resp->mode_valid = 1;
 433
 434                 } else {
 435                         crtc_resp->mode_valid = 0;
 436                 }
 437         }
 438         if (!file_priv->aspect_ratio_allowed)
 439                 crtc_resp->mode.flags &= ~DRM_MODE_FLAG_PIC_AR_MASK;
 440         drm_modeset_unlock(&crtc->mutex);
 441
 442         return 0;
 443 }
 444
 445 static int __drm_mode_set_config_internal(struct drm_mode_set *set,
 446                                           struct drm_modeset_acquire_ctx *ctx)
 447 {
 448         struct drm_crtc *crtc = set->crtc;
 449         struct drm_framebuffer *fb;
 450         struct drm_crtc *tmp;
 451         int ret;
 452
 453         WARN_ON(drm_drv_uses_atomic_modeset(crtc->dev));
 454
 455         /*
 456          * NOTE: ->set_config can also disable other crtcs (if we steal all
 457          * connectors from it), hence we need to refcount the fbs across all
 458          * crtcs. Atomic modeset will have saner semantics ...
 459          */
 460         drm_for_each_crtc(tmp, crtc->dev) {
 461                 struct drm_plane *plane = tmp->primary;
 462
 463                 plane->old_fb = plane->fb;
 464         }
 465
 466         fb = set->fb;
 467
 468         ret = crtc->funcs->set_config(set, ctx);
 469         if (ret == 0) {
 470                 struct drm_plane *plane = crtc->primary;
 471
 472                 plane->crtc = fb ? crtc : NULL;
 473                 plane->fb = fb;
 474         }
 475
 476         drm_for_each_crtc(tmp, crtc->dev) {
 477                 struct drm_plane *plane = tmp->primary;
 478
 479                 if (plane->fb)
 480                         drm_framebuffer_get(plane->fb);
 481                 if (plane->old_fb)
 482                         drm_framebuffer_put(plane->old_fb);
 483                 plane->old_fb = NULL;
 484         }
 485
 486         return ret;
 487 }
 488
 489 /**
 490  * drm_mode_set_config_internal - helper to call &drm_mode_config_funcs.set_config
 491  * @set: modeset config to set
 492  *
 493  * This is a little helper to wrap internal calls to the
 494  * &drm_mode_config_funcs.set_config driver interface. The only thing it adds is
 495  * correct refcounting dance.
 496  *
 497  * This should only be used by non-atomic legacy drivers.
 498  *
 499  * Returns:
 500  * Zero on success, negative errno on failure.
 501  */
 502 int drm_mode_set_config_internal(struct drm_mode_set *set)
 503 {
 504         WARN_ON(drm_drv_uses_atomic_modeset(set->crtc->dev));
 505
 506         return __drm_mode_set_config_internal(set, NULL);
 507 }
 508 EXPORT_SYMBOL(drm_mode_set_config_internal);
 509
 510 /**
 511  * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
 512  *     CRTC viewport
 513  * @crtc: CRTC that framebuffer will be displayed on
 514  * @x: x panning
 515  * @y: y panning
 516  * @mode: mode that framebuffer will be displayed under
 517  * @fb: framebuffer to check size of
 518  */
 519 int drm_crtc_check_viewport(const struct drm_crtc *crtc,
 520                             int x, int y,
 521                             const struct drm_display_mode *mode,
 522                             const struct drm_framebuffer *fb)
 523
 524 {
 525         int hdisplay, vdisplay;
 526
 527         drm_mode_get_hv_timing(mode, &hdisplay, &vdisplay);
 528
 529         if (crtc->state &&
 530             drm_rotation_90_or_270(crtc->primary->state->rotation))
 531                 swap(hdisplay, vdisplay);
 532
 533         return drm_framebuffer_check_src_coords(x << 16, y << 16,
 534                                                 hdisplay << 16, vdisplay << 16,
 535                                                 fb);
 536 }
 537 EXPORT_SYMBOL(drm_crtc_check_viewport);
 538
 539 /**
 540  * drm_mode_setcrtc - set CRTC configuration
 541  * @dev: drm device for the ioctl
 542  * @data: data pointer for the ioctl
 543  * @file_priv: drm file for the ioctl call
 544  *
 545  * Build a new CRTC configuration based on user request.
 546  *
 547  * Called by the user via ioctl.
 548  *
 549  * Returns:
 550  * Zero on success, negative errno on failure.
 551  */
 552 int drm_mode_setcrtc(struct drm_device *dev, void *data,
 553                      struct drm_file *file_priv)
 554 {
 555         struct drm_mode_config *config = &dev->mode_config;
 556         struct drm_mode_crtc *crtc_req = data;
 557         struct drm_crtc *crtc;
 558         struct drm_plane *plane;
 559         struct drm_connector **connector_set = NULL, *connector;
 560         struct drm_framebuffer *fb = NULL;
 561         struct drm_display_mode *mode = NULL;
 562         struct drm_mode_set set;
 563         uint32_t __user *set_connectors_ptr;
 564         struct drm_modeset_acquire_ctx ctx;
 565         int ret;
 566         int i;
 567
 568         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 569                 return -EOPNOTSUPP;
 570
 571         /*
 572          * Universal plane src offsets are only 16.16, prevent havoc for
 573          * drivers using universal plane code internally.
 574          */
 575         if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000)
 576                 return -ERANGE;
 577
 578         crtc = drm_crtc_find(dev, file_priv, crtc_req->crtc_id);
 579         if (!crtc) {
 580                 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
 581                 return -ENOENT;
 582         }
 583         DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
 584
 585         plane = crtc->primary;
 586
 587         /* allow disabling with the primary plane leased */
 588         if (crtc_req->mode_valid && !drm_lease_held(file_priv, plane->base.id))
 589                 return -EACCES;
 590
 591         DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx,
 592                                    DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
 593
 594         if (crtc_req->mode_valid) {
 595                 /* If we have a mode we need a framebuffer. */
 596                 /* If we pass -1, set the mode with the currently bound fb */
 597                 if (crtc_req->fb_id == -1) {
 598                         struct drm_framebuffer *old_fb;
 599
 600                         if (plane->state)
 601                                 old_fb = plane->state->fb;
 602                         else
 603                                 old_fb = plane->fb;
 604
 605                         if (!old_fb) {
 606                                 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
 607                                 ret = -EINVAL;
 608                                 goto out;
 609                         }
 610
 611                         fb = old_fb;
 612                         /* Make refcounting symmetric with the lookup path. */
 613                         drm_framebuffer_get(fb);
 614                 } else {
 615                         fb = drm_framebuffer_lookup(dev, file_priv, crtc_req->fb_id);
 616                         if (!fb) {
 617                                 DRM_DEBUG_KMS("Unknown FB ID%d\n",
 618                                                 crtc_req->fb_id);
 619                                 ret = -ENOENT;
 620                                 goto out;
 621                         }
 622                 }
 623
 624                 mode = drm_mode_create(dev);
 625                 if (!mode) {
 626                         ret = -ENOMEM;
 627                         goto out;
 628                 }
 629                 if (!file_priv->aspect_ratio_allowed &&
 630                     (crtc_req->mode.flags & DRM_MODE_FLAG_PIC_AR_MASK) != DRM_MODE_FLAG_PIC_AR_NONE) {
 631                         DRM_DEBUG_KMS("Unexpected aspect-ratio flag bits\n");
 632                         ret = -EINVAL;
 633                         goto out;
 634                 }
 635
 636
 637                 ret = drm_mode_convert_umode(dev, mode, &crtc_req->mode);
 638                 if (ret) {
 639                         DRM_DEBUG_KMS("Invalid mode (ret=%d, status=%s)\n",
 640                                       ret, drm_get_mode_status_name(mode->status));
 641                         drm_mode_debug_printmodeline(mode);
 642                         goto out;
 643                 }
 644
 645                 /*
 646                  * Check whether the primary plane supports the fb pixel format.
 647                  * Drivers not implementing the universal planes API use a
 648                  * default formats list provided by the DRM core which doesn't
 649                  * match real hardware capabilities. Skip the check in that
 650                  * case.
 651                  */
 652                 if (!plane->format_default) {
 653                         ret = drm_plane_check_pixel_format(plane,
 654                                                            fb->format->format,
 655                                                            fb->modifier);
 656                         if (ret) {
 657                                 struct drm_format_name_buf format_name;
 658
 659                                 DRM_DEBUG_KMS("Invalid pixel format %s, modifier 0x%llx\n",
 660                                               drm_get_format_name(fb->format->format,
 661                                                                   &format_name),
 662                                               fb->modifier);
 663                                 goto out;
 664                         }
 665                 }
 666
 667                 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
 668                                               mode, fb);
 669                 if (ret)
 670                         goto out;
 671
 672         }
 673
 674         if (crtc_req->count_connectors == 0 && mode) {
 675                 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
 676                 ret = -EINVAL;
 677                 goto out;
 678         }
 679
 680         if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
 681                 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
 682                           crtc_req->count_connectors);
 683                 ret = -EINVAL;
 684                 goto out;
 685         }
 686
 687         if (crtc_req->count_connectors > 0) {
 688                 u32 out_id;
 689
 690                 /* Avoid unbounded kernel memory allocation */
 691                 if (crtc_req->count_connectors > config->num_connector) {
 692                         ret = -EINVAL;
 693                         goto out;
 694                 }
 695
 696                 connector_set = kmalloc_array(crtc_req->count_connectors,
 697                                               sizeof(struct drm_connector *),
 698                                               GFP_KERNEL);
 699                 if (!connector_set) {
 700                         ret = -ENOMEM;
 701                         goto out;
 702                 }
 703
 704                 for (i = 0; i < crtc_req->count_connectors; i++) {
 705                         connector_set[i] = NULL;
 706                         set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
 707                         if (get_user(out_id, &set_connectors_ptr[i])) {
 708                                 ret = -EFAULT;
 709                                 goto out;
 710                         }
 711
 712                         connector = drm_connector_lookup(dev, file_priv, out_id);
 713                         if (!connector) {
 714                                 DRM_DEBUG_KMS("Connector id %d unknown\n",
 715                                                 out_id);
 716                                 ret = -ENOENT;
 717                                 goto out;
 718                         }
 719                         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
 720                                         connector->base.id,
 721                                         connector->name);
 722
 723                         connector_set[i] = connector;
 724                 }
 725         }
 726
 727         set.crtc = crtc;
 728         set.x = crtc_req->x;
 729         set.y = crtc_req->y;
 730         set.mode = mode;
 731         set.connectors = connector_set;
 732         set.num_connectors = crtc_req->count_connectors;
 733         set.fb = fb;
 734
 735         if (drm_drv_uses_atomic_modeset(dev))
 736                 ret = crtc->funcs->set_config(&set, &ctx);
 737         else
 738                 ret = __drm_mode_set_config_internal(&set, &ctx);
 739
 740 out:
 741         if (fb)
 742                 drm_framebuffer_put(fb);
 743
 744         if (connector_set) {
 745                 for (i = 0; i < crtc_req->count_connectors; i++) {
 746                         if (connector_set[i])
 747                                 drm_connector_put(connector_set[i]);
 748                 }
 749         }
 750         kfree(connector_set);
 751         drm_mode_destroy(dev, mode);
 752
 753         /* In case we need to retry... */
 754         connector_set = NULL;
 755         fb = NULL;
 756         mode = NULL;
 757
 758         DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 759
 760         return ret;
 761 }
 762
 763 int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
 764                                struct drm_property *property,
 765                                uint64_t value)
 766 {
 767         int ret = -EINVAL;
 768         struct drm_crtc *crtc = obj_to_crtc(obj);
 769
 770         if (crtc->funcs->set_property)
 771                 ret = crtc->funcs->set_property(crtc, property, value);
 772         if (!ret)
 773                 drm_object_property_set_value(obj, property, value);
 774
 775         return ret;
 776 }