drivers/gpu/drm/drm_plane.c

   1 /*
   2  * Copyright (c) 2016 Intel Corporation
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and its
   5  * documentation for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice appear in all copies and that both that copyright
   7  * notice and this permission notice appear in supporting documentation, and
   8  * that the name of the copyright holders not be used in advertising or
   9  * publicity pertaining to distribution of the software without specific,
  10  * written prior permission.  The copyright holders make no representations
  11  * about the suitability of this software for any purpose.  It is provided "as
  12  * is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  16  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  20  * OF THIS SOFTWARE.
  21  */
  22
  23 #include <linux/slab.h>
  24 #include <linux/uaccess.h>
  25
  26 #include <drm/drm_plane.h>
  27 #include <drm/drm_drv.h>
  28 #include <drm/drm_print.h>
  29 #include <drm/drm_framebuffer.h>
  30 #include <drm/drm_file.h>
  31 #include <drm/drm_crtc.h>
  32 #include <drm/drm_fourcc.h>
  33 #include <drm/drm_vblank.h>
  34
  35 #include "drm_crtc_internal.h"
  36
  37 /**
  38  * DOC: overview
  39  *
  40  * A plane represents an image source that can be blended with or overlayed on
  41  * top of a CRTC during the scanout process. Planes take their input data from a
  42  * &drm_framebuffer object. The plane itself specifies the cropping and scaling
  43  * of that image, and where it is placed on the visible are of a display
  44  * pipeline, represented by &drm_crtc. A plane can also have additional
  45  * properties that specify how the pixels are positioned and blended, like
  46  * rotation or Z-position. All these properties are stored in &drm_plane_state.
  47  *
  48  * To create a plane, a KMS drivers allocates and zeroes an instances of
  49  * &struct drm_plane (possibly as part of a larger structure) and registers it
  50  * with a call to drm_universal_plane_init().
  51  *
  52  * Cursor and overlay planes are optional. All drivers should provide one
  53  * primary plane per CRTC to avoid surprising userspace too much. See enum
  54  * drm_plane_type for a more in-depth discussion of these special uapi-relevant
  55  * plane types. Special planes are associated with their CRTC by calling
  56  * drm_crtc_init_with_planes().
  57  *
  58  * The type of a plane is exposed in the immutable "type" enumeration property,
  59  * which has one of the following values: "Overlay", "Primary", "Cursor".
  60  */
  61
  62 static unsigned int drm_num_planes(struct drm_device *dev)
  63 {
  64         unsigned int num = 0;
  65         struct drm_plane *tmp;
  66
  67         drm_for_each_plane(tmp, dev) {
  68                 num++;
  69         }
  70
  71         return num;
  72 }
  73
  74 static inline u32 *
  75 formats_ptr(struct drm_format_modifier_blob *blob)
  76 {
  77         return (u32 *)(((char *)blob) + blob->formats_offset);
  78 }
  79
  80 static inline struct drm_format_modifier *
  81 modifiers_ptr(struct drm_format_modifier_blob *blob)
  82 {
  83         return (struct drm_format_modifier *)(((char *)blob) + blob->modifiers_offset);
  84 }
  85
  86 static int create_in_format_blob(struct drm_device *dev, struct drm_plane *plane)
  87 {
  88         const struct drm_mode_config *config = &dev->mode_config;
  89         struct drm_property_blob *blob;
  90         struct drm_format_modifier *mod;
  91         size_t blob_size, formats_size, modifiers_size;
  92         struct drm_format_modifier_blob *blob_data;
  93         unsigned int i, j;
  94
  95         formats_size = sizeof(__u32) * plane->format_count;
  96         if (WARN_ON(!formats_size)) {
  97                 /* 0 formats are never expected */
  98                 return 0;
  99         }
 100
 101         modifiers_size =
 102                 sizeof(struct drm_format_modifier) * plane->modifier_count;
 103
 104         blob_size = sizeof(struct drm_format_modifier_blob);
 105         /* Modifiers offset is a pointer to a struct with a 64 bit field so it
 106          * should be naturally aligned to 8B.
 107          */
 108         BUILD_BUG_ON(sizeof(struct drm_format_modifier_blob) % 8);
 109         blob_size += ALIGN(formats_size, 8);
 110         blob_size += modifiers_size;
 111
 112         blob = drm_property_create_blob(dev, blob_size, NULL);
 113         if (IS_ERR(blob))
 114                 return -1;
 115
 116         blob_data = blob->data;
 117         blob_data->version = FORMAT_BLOB_CURRENT;
 118         blob_data->count_formats = plane->format_count;
 119         blob_data->formats_offset = sizeof(struct drm_format_modifier_blob);
 120         blob_data->count_modifiers = plane->modifier_count;
 121
 122         blob_data->modifiers_offset =
 123                 ALIGN(blob_data->formats_offset + formats_size, 8);
 124
 125         memcpy(formats_ptr(blob_data), plane->format_types, formats_size);
 126
 127         /* If we can't determine support, just bail */
 128         if (!plane->funcs->format_mod_supported)
 129                 goto done;
 130
 131         mod = modifiers_ptr(blob_data);
 132         for (i = 0; i < plane->modifier_count; i++) {
 133                 for (j = 0; j < plane->format_count; j++) {
 134                         if (plane->funcs->format_mod_supported(plane,
 135                                                                plane->format_types[j],
 136                                                                plane->modifiers[i])) {
 137
 138                                 mod->formats |= 1ULL << j;
 139                         }
 140                 }
 141
 142                 mod->modifier = plane->modifiers[i];
 143                 mod->offset = 0;
 144                 mod->pad = 0;
 145                 mod++;
 146         }
 147
 148 done:
 149         drm_object_attach_property(&plane->base, config->modifiers_property,
 150                                    blob->base.id);
 151
 152         return 0;
 153 }
 154
 155 /**
 156  * drm_universal_plane_init - Initialize a new universal plane object
 157  * @dev: DRM device
 158  * @plane: plane object to init
 159  * @possible_crtcs: bitmask of possible CRTCs
 160  * @funcs: callbacks for the new plane
 161  * @formats: array of supported formats (DRM_FORMAT\_\*)
 162  * @format_count: number of elements in @formats
 163  * @format_modifiers: array of struct drm_format modifiers terminated by
 164  *                    DRM_FORMAT_MOD_INVALID
 165  * @type: type of plane (overlay, primary, cursor)
 166  * @name: printf style format string for the plane name, or NULL for default name
 167  *
 168  * Initializes a plane object of type @type.
 169  *
 170  * Returns:
 171  * Zero on success, error code on failure.
 172  */
 173 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
 174                              uint32_t possible_crtcs,
 175                              const struct drm_plane_funcs *funcs,
 176                              const uint32_t *formats, unsigned int format_count,
 177                              const uint64_t *format_modifiers,
 178                              enum drm_plane_type type,
 179                              const char *name, ...)
 180 {
 181         struct drm_mode_config *config = &dev->mode_config;
 182         unsigned int format_modifier_count = 0;
 183         int ret;
 184
 185         /* plane index is used with 32bit bitmasks */
 186         if (WARN_ON(config->num_total_plane >= 32))
 187                 return -EINVAL;
 188
 189         WARN_ON(drm_drv_uses_atomic_modeset(dev) &&
 190                 (!funcs->atomic_destroy_state ||
 191                  !funcs->atomic_duplicate_state));
 192
 193         ret = drm_mode_object_add(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
 194         if (ret)
 195                 return ret;
 196
 197         drm_modeset_lock_init(&plane->mutex);
 198
 199         plane->base.properties = &plane->properties;
 200         plane->dev = dev;
 201         plane->funcs = funcs;
 202         plane->format_types = kmalloc_array(format_count, sizeof(uint32_t),
 203                                             GFP_KERNEL);
 204         if (!plane->format_types) {
 205                 DRM_DEBUG_KMS("out of memory when allocating plane\n");
 206                 drm_mode_object_unregister(dev, &plane->base);
 207                 return -ENOMEM;
 208         }
 209
 210         /*
 211          * First driver to need more than 64 formats needs to fix this. Each
 212          * format is encoded as a bit and the current code only supports a u64.
 213          */
 214         if (WARN_ON(format_count > 64))
 215                 return -EINVAL;
 216
 217         if (format_modifiers) {
 218                 const uint64_t *temp_modifiers = format_modifiers;
 219                 while (*temp_modifiers++ != DRM_FORMAT_MOD_INVALID)
 220                         format_modifier_count++;
 221         }
 222
 223         if (format_modifier_count)
 224                 config->allow_fb_modifiers = true;
 225
 226         plane->modifier_count = format_modifier_count;
 227         plane->modifiers = kmalloc_array(format_modifier_count,
 228                                          sizeof(format_modifiers[0]),
 229                                          GFP_KERNEL);
 230
 231         if (format_modifier_count && !plane->modifiers) {
 232                 DRM_DEBUG_KMS("out of memory when allocating plane\n");
 233                 kfree(plane->format_types);
 234                 drm_mode_object_unregister(dev, &plane->base);
 235                 return -ENOMEM;
 236         }
 237
 238         if (name) {
 239                 va_list ap;
 240
 241                 va_start(ap, name);
 242                 plane->name = kvasprintf(GFP_KERNEL, name, ap);
 243                 va_end(ap);
 244         } else {
 245                 plane->name = kasprintf(GFP_KERNEL, "plane-%d",
 246                                         drm_num_planes(dev));
 247         }
 248         if (!plane->name) {
 249                 kfree(plane->format_types);
 250                 kfree(plane->modifiers);
 251                 drm_mode_object_unregister(dev, &plane->base);
 252                 return -ENOMEM;
 253         }
 254
 255         memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
 256         plane->format_count = format_count;
 257         memcpy(plane->modifiers, format_modifiers,
 258                format_modifier_count * sizeof(format_modifiers[0]));
 259         plane->possible_crtcs = possible_crtcs;
 260         plane->type = type;
 261
 262         list_add_tail(&plane->head, &config->plane_list);
 263         plane->index = config->num_total_plane++;
 264
 265         drm_object_attach_property(&plane->base,
 266                                    config->plane_type_property,
 267                                    plane->type);
 268
 269         if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
 270                 drm_object_attach_property(&plane->base, config->prop_fb_id, 0);
 271                 drm_object_attach_property(&plane->base, config->prop_in_fence_fd, -1);
 272                 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0);
 273                 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0);
 274                 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0);
 275                 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0);
 276                 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0);
 277                 drm_object_attach_property(&plane->base, config->prop_src_x, 0);
 278                 drm_object_attach_property(&plane->base, config->prop_src_y, 0);
 279                 drm_object_attach_property(&plane->base, config->prop_src_w, 0);
 280                 drm_object_attach_property(&plane->base, config->prop_src_h, 0);
 281         }
 282
 283         if (config->allow_fb_modifiers)
 284                 create_in_format_blob(dev, plane);
 285
 286         return 0;
 287 }
 288 EXPORT_SYMBOL(drm_universal_plane_init);
 289
 290 int drm_plane_register_all(struct drm_device *dev)
 291 {
 292         struct drm_plane *plane;
 293         int ret = 0;
 294
 295         drm_for_each_plane(plane, dev) {
 296                 if (plane->funcs->late_register)
 297                         ret = plane->funcs->late_register(plane);
 298                 if (ret)
 299                         return ret;
 300         }
 301
 302         return 0;
 303 }
 304
 305 void drm_plane_unregister_all(struct drm_device *dev)
 306 {
 307         struct drm_plane *plane;
 308
 309         drm_for_each_plane(plane, dev) {
 310                 if (plane->funcs->early_unregister)
 311                         plane->funcs->early_unregister(plane);
 312         }
 313 }
 314
 315 /**
 316  * drm_plane_init - Initialize a legacy plane
 317  * @dev: DRM device
 318  * @plane: plane object to init
 319  * @possible_crtcs: bitmask of possible CRTCs
 320  * @funcs: callbacks for the new plane
 321  * @formats: array of supported formats (DRM_FORMAT\_\*)
 322  * @format_count: number of elements in @formats
 323  * @is_primary: plane type (primary vs overlay)
 324  *
 325  * Legacy API to initialize a DRM plane.
 326  *
 327  * New drivers should call drm_universal_plane_init() instead.
 328  *
 329  * Returns:
 330  * Zero on success, error code on failure.
 331  */
 332 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
 333                    uint32_t possible_crtcs,
 334                    const struct drm_plane_funcs *funcs,
 335                    const uint32_t *formats, unsigned int format_count,
 336                    bool is_primary)
 337 {
 338         enum drm_plane_type type;
 339
 340         type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
 341         return drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
 342                                         formats, format_count,
 343                                         NULL, type, NULL);
 344 }
 345 EXPORT_SYMBOL(drm_plane_init);
 346
 347 /**
 348  * drm_plane_cleanup - Clean up the core plane usage
 349  * @plane: plane to cleanup
 350  *
 351  * This function cleans up @plane and removes it from the DRM mode setting
 352  * core. Note that the function does *not* free the plane structure itself,
 353  * this is the responsibility of the caller.
 354  */
 355 void drm_plane_cleanup(struct drm_plane *plane)
 356 {
 357         struct drm_device *dev = plane->dev;
 358
 359         drm_modeset_lock_fini(&plane->mutex);
 360
 361         kfree(plane->format_types);
 362         kfree(plane->modifiers);
 363         drm_mode_object_unregister(dev, &plane->base);
 364
 365         BUG_ON(list_empty(&plane->head));
 366
 367         /* Note that the plane_list is considered to be static; should we
 368          * remove the drm_plane at runtime we would have to decrement all
 369          * the indices on the drm_plane after us in the plane_list.
 370          */
 371
 372         list_del(&plane->head);
 373         dev->mode_config.num_total_plane--;
 374
 375         WARN_ON(plane->state && !plane->funcs->atomic_destroy_state);
 376         if (plane->state && plane->funcs->atomic_destroy_state)
 377                 plane->funcs->atomic_destroy_state(plane, plane->state);
 378
 379         kfree(plane->name);
 380
 381         memset(plane, 0, sizeof(*plane));
 382 }
 383 EXPORT_SYMBOL(drm_plane_cleanup);
 384
 385 /**
 386  * drm_plane_from_index - find the registered plane at an index
 387  * @dev: DRM device
 388  * @idx: index of registered plane to find for
 389  *
 390  * Given a plane index, return the registered plane from DRM device's
 391  * list of planes with matching index. This is the inverse of drm_plane_index().
 392  */
 393 struct drm_plane *
 394 drm_plane_from_index(struct drm_device *dev, int idx)
 395 {
 396         struct drm_plane *plane;
 397
 398         drm_for_each_plane(plane, dev)
 399                 if (idx == plane->index)
 400                         return plane;
 401
 402         return NULL;
 403 }
 404 EXPORT_SYMBOL(drm_plane_from_index);
 405
 406 /**
 407  * drm_plane_force_disable - Forcibly disable a plane
 408  * @plane: plane to disable
 409  *
 410  * Forces the plane to be disabled.
 411  *
 412  * Used when the plane's current framebuffer is destroyed,
 413  * and when restoring fbdev mode.
 414  *
 415  * Note that this function is not suitable for atomic drivers, since it doesn't
 416  * wire through the lock acquisition context properly and hence can't handle
 417  * retries or driver private locks. You probably want to use
 418  * drm_atomic_helper_disable_plane() or
 419  * drm_atomic_helper_disable_planes_on_crtc() instead.
 420  */
 421 void drm_plane_force_disable(struct drm_plane *plane)
 422 {
 423         int ret;
 424
 425         if (!plane->fb)
 426                 return;
 427
 428         WARN_ON(drm_drv_uses_atomic_modeset(plane->dev));
 429
 430         plane->old_fb = plane->fb;
 431         ret = plane->funcs->disable_plane(plane, NULL);
 432         if (ret) {
 433                 DRM_ERROR("failed to disable plane with busy fb\n");
 434                 plane->old_fb = NULL;
 435                 return;
 436         }
 437         /* disconnect the plane from the fb and crtc: */
 438         drm_framebuffer_put(plane->old_fb);
 439         plane->old_fb = NULL;
 440         plane->fb = NULL;
 441         plane->crtc = NULL;
 442 }
 443 EXPORT_SYMBOL(drm_plane_force_disable);
 444
 445 /**
 446  * drm_mode_plane_set_obj_prop - set the value of a property
 447  * @plane: drm plane object to set property value for
 448  * @property: property to set
 449  * @value: value the property should be set to
 450  *
 451  * This functions sets a given property on a given plane object. This function
 452  * calls the driver's ->set_property callback and changes the software state of
 453  * the property if the callback succeeds.
 454  *
 455  * Returns:
 456  * Zero on success, error code on failure.
 457  */
 458 int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
 459                                 struct drm_property *property,
 460                                 uint64_t value)
 461 {
 462         int ret = -EINVAL;
 463         struct drm_mode_object *obj = &plane->base;
 464
 465         if (plane->funcs->set_property)
 466                 ret = plane->funcs->set_property(plane, property, value);
 467         if (!ret)
 468                 drm_object_property_set_value(obj, property, value);
 469
 470         return ret;
 471 }
 472 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop);
 473
 474 int drm_mode_getplane_res(struct drm_device *dev, void *data,
 475                           struct drm_file *file_priv)
 476 {
 477         struct drm_mode_get_plane_res *plane_resp = data;
 478         struct drm_plane *plane;
 479         uint32_t __user *plane_ptr;
 480         int count = 0;
 481
 482         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 483                 return -EOPNOTSUPP;
 484
 485         plane_ptr = u64_to_user_ptr(plane_resp->plane_id_ptr);
 486
 487         /*
 488          * This ioctl is called twice, once to determine how much space is
 489          * needed, and the 2nd time to fill it.
 490          */
 491         drm_for_each_plane(plane, dev) {
 492                 /*
 493                  * Unless userspace set the 'universal planes'
 494                  * capability bit, only advertise overlays.
 495                  */
 496                 if (plane->type != DRM_PLANE_TYPE_OVERLAY &&
 497                     !file_priv->universal_planes)
 498                         continue;
 499
 500                 if (drm_lease_held(file_priv, plane->base.id)) {
 501                         if (count < plane_resp->count_planes &&
 502                             put_user(plane->base.id, plane_ptr + count))
 503                                 return -EFAULT;
 504                         count++;
 505                 }
 506         }
 507         plane_resp->count_planes = count;
 508
 509         return 0;
 510 }
 511
 512 int drm_mode_getplane(struct drm_device *dev, void *data,
 513                       struct drm_file *file_priv)
 514 {
 515         struct drm_mode_get_plane *plane_resp = data;
 516         struct drm_plane *plane;
 517         uint32_t __user *format_ptr;
 518
 519         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 520                 return -EOPNOTSUPP;
 521
 522         plane = drm_plane_find(dev, file_priv, plane_resp->plane_id);
 523         if (!plane)
 524                 return -ENOENT;
 525
 526         drm_modeset_lock(&plane->mutex, NULL);
 527         if (plane->state && plane->state->crtc && drm_lease_held(file_priv, plane->state->crtc->base.id))
 528                 plane_resp->crtc_id = plane->state->crtc->base.id;
 529         else if (!plane->state && plane->crtc && drm_lease_held(file_priv, plane->crtc->base.id))
 530                 plane_resp->crtc_id = plane->crtc->base.id;
 531         else
 532                 plane_resp->crtc_id = 0;
 533
 534         if (plane->state && plane->state->fb)
 535                 plane_resp->fb_id = plane->state->fb->base.id;
 536         else if (!plane->state && plane->fb)
 537                 plane_resp->fb_id = plane->fb->base.id;
 538         else
 539                 plane_resp->fb_id = 0;
 540         drm_modeset_unlock(&plane->mutex);
 541
 542         plane_resp->plane_id = plane->base.id;
 543         plane_resp->possible_crtcs = drm_lease_filter_crtcs(file_priv,
 544                                                             plane->possible_crtcs);
 545
 546         plane_resp->gamma_size = 0;
 547
 548         /*
 549          * This ioctl is called twice, once to determine how much space is
 550          * needed, and the 2nd time to fill it.
 551          */
 552         if (plane->format_count &&
 553             (plane_resp->count_format_types >= plane->format_count)) {
 554                 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
 555                 if (copy_to_user(format_ptr,
 556                                  plane->format_types,
 557                                  sizeof(uint32_t) * plane->format_count)) {
 558                         return -EFAULT;
 559                 }
 560         }
 561         plane_resp->count_format_types = plane->format_count;
 562
 563         return 0;
 564 }
 565
 566 int drm_plane_check_pixel_format(struct drm_plane *plane,
 567                                  u32 format, u64 modifier)
 568 {
 569         unsigned int i;
 570
 571         for (i = 0; i < plane->format_count; i++) {
 572                 if (format == plane->format_types[i])
 573                         break;
 574         }
 575         if (i == plane->format_count)
 576                 return -EINVAL;
 577
 578         if (plane->funcs->format_mod_supported) {
 579                 if (!plane->funcs->format_mod_supported(plane, format, modifier))
 580                         return -EINVAL;
 581         } else {
 582                 if (!plane->modifier_count)
 583                         return 0;
 584
 585                 for (i = 0; i < plane->modifier_count; i++) {
 586                         if (modifier == plane->modifiers[i])
 587                                 break;
 588                 }
 589                 if (i == plane->modifier_count)
 590                         return -EINVAL;
 591         }
 592
 593         return 0;
 594 }
 595
 596 static int __setplane_check(struct drm_plane *plane,
 597                             struct drm_crtc *crtc,
 598                             struct drm_framebuffer *fb,
 599                             int32_t crtc_x, int32_t crtc_y,
 600                             uint32_t crtc_w, uint32_t crtc_h,
 601                             uint32_t src_x, uint32_t src_y,
 602                             uint32_t src_w, uint32_t src_h)
 603 {
 604         int ret;
 605
 606         /* Check whether this plane is usable on this CRTC */
 607         if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
 608                 DRM_DEBUG_KMS("Invalid crtc for plane\n");
 609                 return -EINVAL;
 610         }
 611
 612         /* Check whether this plane supports the fb pixel format. */
 613         ret = drm_plane_check_pixel_format(plane, fb->format->format,
 614                                            fb->modifier);
 615         if (ret) {
 616                 struct drm_format_name_buf format_name;
 617
 618                 DRM_DEBUG_KMS("Invalid pixel format %s, modifier 0x%llx\n",
 619                               drm_get_format_name(fb->format->format,
 620                                                   &format_name),
 621                               fb->modifier);
 622                 return ret;
 623         }
 624
 625         /* Give drivers some help against integer overflows */
 626         if (crtc_w > INT_MAX ||
 627             crtc_x > INT_MAX - (int32_t) crtc_w ||
 628             crtc_h > INT_MAX ||
 629             crtc_y > INT_MAX - (int32_t) crtc_h) {
 630                 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
 631                               crtc_w, crtc_h, crtc_x, crtc_y);
 632                 return -ERANGE;
 633         }
 634
 635         ret = drm_framebuffer_check_src_coords(src_x, src_y, src_w, src_h, fb);
 636         if (ret)
 637                 return ret;
 638
 639         return 0;
 640 }
 641
 642 /**
 643  * drm_any_plane_has_format - Check whether any plane supports this format and modifier combination
 644  * @dev: DRM device
 645  * @format: pixel format (DRM_FORMAT_*)
 646  * @modifier: data layout modifier
 647  *
 648  * Returns:
 649  * Whether at least one plane supports the specified format and modifier combination.
 650  */
 651 bool drm_any_plane_has_format(struct drm_device *dev,
 652                               u32 format, u64 modifier)
 653 {
 654         struct drm_plane *plane;
 655
 656         drm_for_each_plane(plane, dev) {
 657                 if (drm_plane_check_pixel_format(plane, format, modifier) == 0)
 658                         return true;
 659         }
 660
 661         return false;
 662 }
 663 EXPORT_SYMBOL(drm_any_plane_has_format);
 664
 665 /*
 666  * __setplane_internal - setplane handler for internal callers
 667  *
 668  * This function will take a reference on the new fb for the plane
 669  * on success.
 670  *
 671  * src_{x,y,w,h} are provided in 16.16 fixed point format
 672  */
 673 static int __setplane_internal(struct drm_plane *plane,
 674                                struct drm_crtc *crtc,
 675                                struct drm_framebuffer *fb,
 676                                int32_t crtc_x, int32_t crtc_y,
 677                                uint32_t crtc_w, uint32_t crtc_h,
 678                                /* src_{x,y,w,h} values are 16.16 fixed point */
 679                                uint32_t src_x, uint32_t src_y,
 680                                uint32_t src_w, uint32_t src_h,
 681                                struct drm_modeset_acquire_ctx *ctx)
 682 {
 683         int ret = 0;
 684
 685         WARN_ON(drm_drv_uses_atomic_modeset(plane->dev));
 686
 687         /* No fb means shut it down */
 688         if (!fb) {
 689                 plane->old_fb = plane->fb;
 690                 ret = plane->funcs->disable_plane(plane, ctx);
 691                 if (!ret) {
 692                         plane->crtc = NULL;
 693                         plane->fb = NULL;
 694                 } else {
 695                         plane->old_fb = NULL;
 696                 }
 697                 goto out;
 698         }
 699
 700         ret = __setplane_check(plane, crtc, fb,
 701                                crtc_x, crtc_y, crtc_w, crtc_h,
 702                                src_x, src_y, src_w, src_h);
 703         if (ret)
 704                 goto out;
 705
 706         plane->old_fb = plane->fb;
 707         ret = plane->funcs->update_plane(plane, crtc, fb,
 708                                          crtc_x, crtc_y, crtc_w, crtc_h,
 709                                          src_x, src_y, src_w, src_h, ctx);
 710         if (!ret) {
 711                 plane->crtc = crtc;
 712                 plane->fb = fb;
 713                 drm_framebuffer_get(plane->fb);
 714         } else {
 715                 plane->old_fb = NULL;
 716         }
 717
 718 out:
 719         if (plane->old_fb)
 720                 drm_framebuffer_put(plane->old_fb);
 721         plane->old_fb = NULL;
 722
 723         return ret;
 724 }
 725
 726 static int __setplane_atomic(struct drm_plane *plane,
 727                              struct drm_crtc *crtc,
 728                              struct drm_framebuffer *fb,
 729                              int32_t crtc_x, int32_t crtc_y,
 730                              uint32_t crtc_w, uint32_t crtc_h,
 731                              uint32_t src_x, uint32_t src_y,
 732                              uint32_t src_w, uint32_t src_h,
 733                              struct drm_modeset_acquire_ctx *ctx)
 734 {
 735         int ret;
 736
 737         WARN_ON(!drm_drv_uses_atomic_modeset(plane->dev));
 738
 739         /* No fb means shut it down */
 740         if (!fb)
 741                 return plane->funcs->disable_plane(plane, ctx);
 742
 743         /*
 744          * FIXME: This is redundant with drm_atomic_plane_check(),
 745          * but the legacy cursor/"async" .update_plane() tricks
 746          * don't call that so we still need this here. Should remove
 747          * this when all .update_plane() implementations have been
 748          * fixed to call drm_atomic_plane_check().
 749          */
 750         ret = __setplane_check(plane, crtc, fb,
 751                                crtc_x, crtc_y, crtc_w, crtc_h,
 752                                src_x, src_y, src_w, src_h);
 753         if (ret)
 754                 return ret;
 755
 756         return plane->funcs->update_plane(plane, crtc, fb,
 757                                           crtc_x, crtc_y, crtc_w, crtc_h,
 758                                           src_x, src_y, src_w, src_h, ctx);
 759 }
 760
 761 static int setplane_internal(struct drm_plane *plane,
 762                              struct drm_crtc *crtc,
 763                              struct drm_framebuffer *fb,
 764                              int32_t crtc_x, int32_t crtc_y,
 765                              uint32_t crtc_w, uint32_t crtc_h,
 766                              /* src_{x,y,w,h} values are 16.16 fixed point */
 767                              uint32_t src_x, uint32_t src_y,
 768                              uint32_t src_w, uint32_t src_h)
 769 {
 770         struct drm_modeset_acquire_ctx ctx;
 771         int ret;
 772
 773         DRM_MODESET_LOCK_ALL_BEGIN(plane->dev, ctx,
 774                                    DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
 775
 776         if (drm_drv_uses_atomic_modeset(plane->dev))
 777                 ret = __setplane_atomic(plane, crtc, fb,
 778                                         crtc_x, crtc_y, crtc_w, crtc_h,
 779                                         src_x, src_y, src_w, src_h, &ctx);
 780         else
 781                 ret = __setplane_internal(plane, crtc, fb,
 782                                           crtc_x, crtc_y, crtc_w, crtc_h,
 783                                           src_x, src_y, src_w, src_h, &ctx);
 784
 785         DRM_MODESET_LOCK_ALL_END(ctx, ret);
 786
 787         return ret;
 788 }
 789
 790 int drm_mode_setplane(struct drm_device *dev, void *data,
 791                       struct drm_file *file_priv)
 792 {
 793         struct drm_mode_set_plane *plane_req = data;
 794         struct drm_plane *plane;
 795         struct drm_crtc *crtc = NULL;
 796         struct drm_framebuffer *fb = NULL;
 797         int ret;
 798
 799         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 800                 return -EOPNOTSUPP;
 801
 802         /*
 803          * First, find the plane, crtc, and fb objects.  If not available,
 804          * we don't bother to call the driver.
 805          */
 806         plane = drm_plane_find(dev, file_priv, plane_req->plane_id);
 807         if (!plane) {
 808                 DRM_DEBUG_KMS("Unknown plane ID %d\n",
 809                               plane_req->plane_id);
 810                 return -ENOENT;
 811         }
 812
 813         if (plane_req->fb_id) {
 814                 fb = drm_framebuffer_lookup(dev, file_priv, plane_req->fb_id);
 815                 if (!fb) {
 816                         DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
 817                                       plane_req->fb_id);
 818                         return -ENOENT;
 819                 }
 820
 821                 crtc = drm_crtc_find(dev, file_priv, plane_req->crtc_id);
 822                 if (!crtc) {
 823                         drm_framebuffer_put(fb);
 824                         DRM_DEBUG_KMS("Unknown crtc ID %d\n",
 825                                       plane_req->crtc_id);
 826                         return -ENOENT;
 827                 }
 828         }
 829
 830         ret = setplane_internal(plane, crtc, fb,
 831                                 plane_req->crtc_x, plane_req->crtc_y,
 832                                 plane_req->crtc_w, plane_req->crtc_h,
 833                                 plane_req->src_x, plane_req->src_y,
 834                                 plane_req->src_w, plane_req->src_h);
 835
 836         if (fb)
 837                 drm_framebuffer_put(fb);
 838
 839         return ret;
 840 }
 841
 842 static int drm_mode_cursor_universal(struct drm_crtc *crtc,
 843                                      struct drm_mode_cursor2 *req,
 844                                      struct drm_file *file_priv,
 845                                      struct drm_modeset_acquire_ctx *ctx)
 846 {
 847         struct drm_device *dev = crtc->dev;
 848         struct drm_plane *plane = crtc->cursor;
 849         struct drm_framebuffer *fb = NULL;
 850         struct drm_mode_fb_cmd2 fbreq = {
 851                 .width = req->width,
 852                 .height = req->height,
 853                 .pixel_format = DRM_FORMAT_ARGB8888,
 854                 .pitches = { req->width * 4 },
 855                 .handles = { req->handle },
 856         };
 857         int32_t crtc_x, crtc_y;
 858         uint32_t crtc_w = 0, crtc_h = 0;
 859         uint32_t src_w = 0, src_h = 0;
 860         int ret = 0;
 861
 862         BUG_ON(!plane);
 863         WARN_ON(plane->crtc != crtc && plane->crtc != NULL);
 864
 865         /*
 866          * Obtain fb we'll be using (either new or existing) and take an extra
 867          * reference to it if fb != null.  setplane will take care of dropping
 868          * the reference if the plane update fails.
 869          */
 870         if (req->flags & DRM_MODE_CURSOR_BO) {
 871                 if (req->handle) {
 872                         fb = drm_internal_framebuffer_create(dev, &fbreq, file_priv);
 873                         if (IS_ERR(fb)) {
 874                                 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n");
 875                                 return PTR_ERR(fb);
 876                         }
 877
 878                         fb->hot_x = req->hot_x;
 879                         fb->hot_y = req->hot_y;
 880                 } else {
 881                         fb = NULL;
 882                 }
 883         } else {
 884                 if (plane->state)
 885                         fb = plane->state->fb;
 886                 else
 887                         fb = plane->fb;
 888
 889                 if (fb)
 890                         drm_framebuffer_get(fb);
 891         }
 892
 893         if (req->flags & DRM_MODE_CURSOR_MOVE) {
 894                 crtc_x = req->x;
 895                 crtc_y = req->y;
 896         } else {
 897                 crtc_x = crtc->cursor_x;
 898                 crtc_y = crtc->cursor_y;
 899         }
 900
 901         if (fb) {
 902                 crtc_w = fb->width;
 903                 crtc_h = fb->height;
 904                 src_w = fb->width << 16;
 905                 src_h = fb->height << 16;
 906         }
 907
 908         if (drm_drv_uses_atomic_modeset(dev))
 909                 ret = __setplane_atomic(plane, crtc, fb,
 910                                         crtc_x, crtc_y, crtc_w, crtc_h,
 911                                         0, 0, src_w, src_h, ctx);
 912         else
 913                 ret = __setplane_internal(plane, crtc, fb,
 914                                           crtc_x, crtc_y, crtc_w, crtc_h,
 915                                           0, 0, src_w, src_h, ctx);
 916
 917         if (fb)
 918                 drm_framebuffer_put(fb);
 919
 920         /* Update successful; save new cursor position, if necessary */
 921         if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) {
 922                 crtc->cursor_x = req->x;
 923                 crtc->cursor_y = req->y;
 924         }
 925
 926         return ret;
 927 }
 928
 929 static int drm_mode_cursor_common(struct drm_device *dev,
 930                                   struct drm_mode_cursor2 *req,
 931                                   struct drm_file *file_priv)
 932 {
 933         struct drm_crtc *crtc;
 934         struct drm_modeset_acquire_ctx ctx;
 935         int ret = 0;
 936
 937         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 938                 return -EOPNOTSUPP;
 939
 940         if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
 941                 return -EINVAL;
 942
 943         crtc = drm_crtc_find(dev, file_priv, req->crtc_id);
 944         if (!crtc) {
 945                 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
 946                 return -ENOENT;
 947         }
 948
 949         drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
 950 retry:
 951         ret = drm_modeset_lock(&crtc->mutex, &ctx);
 952         if (ret)
 953                 goto out;
 954         /*
 955          * If this crtc has a universal cursor plane, call that plane's update
 956          * handler rather than using legacy cursor handlers.
 957          */
 958         if (crtc->cursor) {
 959                 ret = drm_modeset_lock(&crtc->cursor->mutex, &ctx);
 960                 if (ret)
 961                         goto out;
 962
 963                 if (!drm_lease_held(file_priv, crtc->cursor->base.id)) {
 964                         ret = -EACCES;
 965                         goto out;
 966                 }
 967
 968                 ret = drm_mode_cursor_universal(crtc, req, file_priv, &ctx);
 969                 goto out;
 970         }
 971
 972         if (req->flags & DRM_MODE_CURSOR_BO) {
 973                 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
 974                         ret = -ENXIO;
 975                         goto out;
 976                 }
 977                 /* Turns off the cursor if handle is 0 */
 978                 if (crtc->funcs->cursor_set2)
 979                         ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
 980                                                       req->width, req->height, req->hot_x, req->hot_y);
 981                 else
 982                         ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
 983                                                       req->width, req->height);
 984         }
 985
 986         if (req->flags & DRM_MODE_CURSOR_MOVE) {
 987                 if (crtc->funcs->cursor_move) {
 988                         ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
 989                 } else {
 990                         ret = -EFAULT;
 991                         goto out;
 992                 }
 993         }
 994 out:
 995         if (ret == -EDEADLK) {
 996                 ret = drm_modeset_backoff(&ctx);
 997                 if (!ret)
 998                         goto retry;
 999         }
1000
1001         drm_modeset_drop_locks(&ctx);
1002         drm_modeset_acquire_fini(&ctx);
1003
1004         return ret;
1005
1006 }
1007
1008
1009 int drm_mode_cursor_ioctl(struct drm_device *dev,
1010                           void *data, struct drm_file *file_priv)
1011 {
1012         struct drm_mode_cursor *req = data;
1013         struct drm_mode_cursor2 new_req;
1014
1015         memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
1016         new_req.hot_x = new_req.hot_y = 0;
1017
1018         return drm_mode_cursor_common(dev, &new_req, file_priv);
1019 }
1020
1021 /*
1022  * Set the cursor configuration based on user request. This implements the 2nd
1023  * version of the cursor ioctl, which allows userspace to additionally specify
1024  * the hotspot of the pointer.
1025  */
1026 int drm_mode_cursor2_ioctl(struct drm_device *dev,
1027                            void *data, struct drm_file *file_priv)
1028 {
1029         struct drm_mode_cursor2 *req = data;
1030
1031         return drm_mode_cursor_common(dev, req, file_priv);
1032 }
1033
1034 int drm_mode_page_flip_ioctl(struct drm_device *dev,
1035                              void *data, struct drm_file *file_priv)
1036 {
1037         struct drm_mode_crtc_page_flip_target *page_flip = data;
1038         struct drm_crtc *crtc;
1039         struct drm_plane *plane;
1040         struct drm_framebuffer *fb = NULL, *old_fb;
1041         struct drm_pending_vblank_event *e = NULL;
1042         u32 target_vblank = page_flip->sequence;
1043         struct drm_modeset_acquire_ctx ctx;
1044         int ret = -EINVAL;
1045
1046         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1047                 return -EOPNOTSUPP;
1048
1049         if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS)
1050                 return -EINVAL;
1051
1052         if (page_flip->sequence != 0 && !(page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET))
1053                 return -EINVAL;
1054
1055         /* Only one of the DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE/RELATIVE flags
1056          * can be specified
1057          */
1058         if ((page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) == DRM_MODE_PAGE_FLIP_TARGET)
1059                 return -EINVAL;
1060
1061         if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip)
1062                 return -EINVAL;
1063
1064         crtc = drm_crtc_find(dev, file_priv, page_flip->crtc_id);
1065         if (!crtc)
1066                 return -ENOENT;
1067
1068         plane = crtc->primary;
1069
1070         if (!drm_lease_held(file_priv, plane->base.id))
1071                 return -EACCES;
1072
1073         if (crtc->funcs->page_flip_target) {
1074                 u32 current_vblank;
1075                 int r;
1076
1077                 r = drm_crtc_vblank_get(crtc);
1078                 if (r)
1079                         return r;
1080
1081                 current_vblank = (u32)drm_crtc_vblank_count(crtc);
1082
1083                 switch (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) {
1084                 case DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE:
1085                         if ((int)(target_vblank - current_vblank) > 1) {
1086                                 DRM_DEBUG("Invalid absolute flip target %u, "
1087                                           "must be <= %u\n", target_vblank,
1088                                           current_vblank + 1);
1089                                 drm_crtc_vblank_put(crtc);
1090                                 return -EINVAL;
1091                         }
1092                         break;
1093                 case DRM_MODE_PAGE_FLIP_TARGET_RELATIVE:
1094                         if (target_vblank != 0 && target_vblank != 1) {
1095                                 DRM_DEBUG("Invalid relative flip target %u, "
1096                                           "must be 0 or 1\n", target_vblank);
1097                                 drm_crtc_vblank_put(crtc);
1098                                 return -EINVAL;
1099                         }
1100                         target_vblank += current_vblank;
1101                         break;
1102                 default:
1103                         target_vblank = current_vblank +
1104                                 !(page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC);
1105                         break;
1106                 }
1107         } else if (crtc->funcs->page_flip == NULL ||
1108                    (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET)) {
1109                 return -EINVAL;
1110         }
1111
1112         drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
1113 retry:
1114         ret = drm_modeset_lock(&crtc->mutex, &ctx);
1115         if (ret)
1116                 goto out;
1117         ret = drm_modeset_lock(&plane->mutex, &ctx);
1118         if (ret)
1119                 goto out;
1120
1121         if (plane->state)
1122                 old_fb = plane->state->fb;
1123         else
1124                 old_fb = plane->fb;
1125
1126         if (old_fb == NULL) {
1127                 /* The framebuffer is currently unbound, presumably
1128                  * due to a hotplug event, that userspace has not
1129                  * yet discovered.
1130                  */
1131                 ret = -EBUSY;
1132                 goto out;
1133         }
1134
1135         fb = drm_framebuffer_lookup(dev, file_priv, page_flip->fb_id);
1136         if (!fb) {
1137                 ret = -ENOENT;
1138                 goto out;
1139         }
1140
1141         if (plane->state) {
1142                 const struct drm_plane_state *state = plane->state;
1143
1144                 ret = drm_framebuffer_check_src_coords(state->src_x,
1145                                                        state->src_y,
1146                                                        state->src_w,
1147                                                        state->src_h,
1148                                                        fb);
1149         } else {
1150                 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y,
1151                                               &crtc->mode, fb);
1152         }
1153         if (ret)
1154                 goto out;
1155
1156         if (old_fb->format != fb->format) {
1157                 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
1158                 ret = -EINVAL;
1159                 goto out;
1160         }
1161
1162         if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
1163                 e = kzalloc(sizeof *e, GFP_KERNEL);
1164                 if (!e) {
1165                         ret = -ENOMEM;
1166                         goto out;
1167                 }
1168
1169                 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
1170                 e->event.base.length = sizeof(e->event);
1171                 e->event.vbl.user_data = page_flip->user_data;
1172                 e->event.vbl.crtc_id = crtc->base.id;
1173
1174                 ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base);
1175                 if (ret) {
1176                         kfree(e);
1177                         e = NULL;
1178                         goto out;
1179                 }
1180         }
1181
1182         plane->old_fb = plane->fb;
1183         if (crtc->funcs->page_flip_target)
1184                 ret = crtc->funcs->page_flip_target(crtc, fb, e,
1185                                                     page_flip->flags,
1186                                                     target_vblank,
1187                                                     &ctx);
1188         else
1189                 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags,
1190                                              &ctx);
1191         if (ret) {
1192                 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT)
1193                         drm_event_cancel_free(dev, &e->base);
1194                 /* Keep the old fb, don't unref it. */
1195                 plane->old_fb = NULL;
1196         } else {
1197                 if (!plane->state) {
1198                         plane->fb = fb;
1199                         drm_framebuffer_get(fb);
1200                 }
1201         }
1202
1203 out:
1204         if (fb)
1205                 drm_framebuffer_put(fb);
1206         if (plane->old_fb)
1207                 drm_framebuffer_put(plane->old_fb);
1208         plane->old_fb = NULL;
1209
1210         if (ret == -EDEADLK) {
1211                 ret = drm_modeset_backoff(&ctx);
1212                 if (!ret)
1213                         goto retry;
1214         }
1215
1216         drm_modeset_drop_locks(&ctx);
1217         drm_modeset_acquire_fini(&ctx);
1218
1219         if (ret && crtc->funcs->page_flip_target)
1220                 drm_crtc_vblank_put(crtc);
1221
1222         return ret;
1223 }