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/list.h>
  33 #include <linux/slab.h>
  34 #include <linux/export.h>
  35 #include <drm/drmP.h>
  36 #include <drm/drm_crtc.h>
  37 #include <drm/drm_edid.h>
  38 #include <drm/drm_fourcc.h>
  39
  40 /* Avoid boilerplate.  I'm tired of typing. */
  41 #define DRM_ENUM_NAME_FN(fnname, list)                          \
  42         char *fnname(int val)                                   \
  43         {                                                       \
  44                 int i;                                          \
  45                 for (i = 0; i < ARRAY_SIZE(list); i++) {        \
  46                         if (list[i].type == val)                \
  47                                 return list[i].name;            \
  48                 }                                               \
  49                 return "(unknown)";                             \
  50         }
  51
  52 /*
  53  * Global properties
  54  */
  55 static struct drm_prop_enum_list drm_dpms_enum_list[] =
  56 {       { DRM_MODE_DPMS_ON, "On" },
  57         { DRM_MODE_DPMS_STANDBY, "Standby" },
  58         { DRM_MODE_DPMS_SUSPEND, "Suspend" },
  59         { DRM_MODE_DPMS_OFF, "Off" }
  60 };
  61
  62 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
  63
  64 /*
  65  * Optional properties
  66  */
  67 static struct drm_prop_enum_list drm_scaling_mode_enum_list[] =
  68 {
  69         { DRM_MODE_SCALE_NONE, "None" },
  70         { DRM_MODE_SCALE_FULLSCREEN, "Full" },
  71         { DRM_MODE_SCALE_CENTER, "Center" },
  72         { DRM_MODE_SCALE_ASPECT, "Full aspect" },
  73 };
  74
  75 static struct drm_prop_enum_list drm_dithering_mode_enum_list[] =
  76 {
  77         { DRM_MODE_DITHERING_OFF, "Off" },
  78         { DRM_MODE_DITHERING_ON, "On" },
  79         { DRM_MODE_DITHERING_AUTO, "Automatic" },
  80 };
  81
  82 /*
  83  * Non-global properties, but "required" for certain connectors.
  84  */
  85 static struct drm_prop_enum_list drm_dvi_i_select_enum_list[] =
  86 {
  87         { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
  88         { DRM_MODE_SUBCONNECTOR_DVID,      "DVI-D"     }, /* DVI-I  */
  89         { DRM_MODE_SUBCONNECTOR_DVIA,      "DVI-A"     }, /* DVI-I  */
  90 };
  91
  92 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
  93
  94 static struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] =
  95 {
  96         { DRM_MODE_SUBCONNECTOR_Unknown,   "Unknown"   }, /* DVI-I and TV-out */
  97         { DRM_MODE_SUBCONNECTOR_DVID,      "DVI-D"     }, /* DVI-I  */
  98         { DRM_MODE_SUBCONNECTOR_DVIA,      "DVI-A"     }, /* DVI-I  */
  99 };
 100
 101 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
 102                  drm_dvi_i_subconnector_enum_list)
 103
 104 static struct drm_prop_enum_list drm_tv_select_enum_list[] =
 105 {
 106         { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
 107         { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
 108         { DRM_MODE_SUBCONNECTOR_SVIDEO,    "SVIDEO"    }, /* TV-out */
 109         { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
 110         { DRM_MODE_SUBCONNECTOR_SCART,     "SCART"     }, /* TV-out */
 111 };
 112
 113 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
 114
 115 static struct drm_prop_enum_list drm_tv_subconnector_enum_list[] =
 116 {
 117         { DRM_MODE_SUBCONNECTOR_Unknown,   "Unknown"   }, /* DVI-I and TV-out */
 118         { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
 119         { DRM_MODE_SUBCONNECTOR_SVIDEO,    "SVIDEO"    }, /* TV-out */
 120         { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
 121         { DRM_MODE_SUBCONNECTOR_SCART,     "SCART"     }, /* TV-out */
 122 };
 123
 124 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
 125                  drm_tv_subconnector_enum_list)
 126
 127 static struct drm_prop_enum_list drm_dirty_info_enum_list[] = {
 128         { DRM_MODE_DIRTY_OFF,      "Off"      },
 129         { DRM_MODE_DIRTY_ON,       "On"       },
 130         { DRM_MODE_DIRTY_ANNOTATE, "Annotate" },
 131 };
 132
 133 DRM_ENUM_NAME_FN(drm_get_dirty_info_name,
 134                  drm_dirty_info_enum_list)
 135
 136 struct drm_conn_prop_enum_list {
 137         int type;
 138         char *name;
 139         int count;
 140 };
 141
 142 /*
 143  * Connector and encoder types.
 144  */
 145 static struct drm_conn_prop_enum_list drm_connector_enum_list[] =
 146 {       { DRM_MODE_CONNECTOR_Unknown, "Unknown", 0 },
 147         { DRM_MODE_CONNECTOR_VGA, "VGA", 0 },
 148         { DRM_MODE_CONNECTOR_DVII, "DVI-I", 0 },
 149         { DRM_MODE_CONNECTOR_DVID, "DVI-D", 0 },
 150         { DRM_MODE_CONNECTOR_DVIA, "DVI-A", 0 },
 151         { DRM_MODE_CONNECTOR_Composite, "Composite", 0 },
 152         { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO", 0 },
 153         { DRM_MODE_CONNECTOR_LVDS, "LVDS", 0 },
 154         { DRM_MODE_CONNECTOR_Component, "Component", 0 },
 155         { DRM_MODE_CONNECTOR_9PinDIN, "DIN", 0 },
 156         { DRM_MODE_CONNECTOR_DisplayPort, "DP", 0 },
 157         { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A", 0 },
 158         { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B", 0 },
 159         { DRM_MODE_CONNECTOR_TV, "TV", 0 },
 160         { DRM_MODE_CONNECTOR_eDP, "eDP", 0 },
 161         { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual", 0},
 162 };
 163
 164 static struct drm_prop_enum_list drm_encoder_enum_list[] =
 165 {       { DRM_MODE_ENCODER_NONE, "None" },
 166         { DRM_MODE_ENCODER_DAC, "DAC" },
 167         { DRM_MODE_ENCODER_TMDS, "TMDS" },
 168         { DRM_MODE_ENCODER_LVDS, "LVDS" },
 169         { DRM_MODE_ENCODER_TVDAC, "TV" },
 170         { DRM_MODE_ENCODER_VIRTUAL, "Virtual" },
 171 };
 172
 173 char *drm_get_encoder_name(struct drm_encoder *encoder)
 174 {
 175         static char buf[32];
 176
 177         snprintf(buf, 32, "%s-%d",
 178                  drm_encoder_enum_list[encoder->encoder_type].name,
 179                  encoder->base.id);
 180         return buf;
 181 }
 182 EXPORT_SYMBOL(drm_get_encoder_name);
 183
 184 char *drm_get_connector_name(struct drm_connector *connector)
 185 {
 186         static char buf[32];
 187
 188         snprintf(buf, 32, "%s-%d",
 189                  drm_connector_enum_list[connector->connector_type].name,
 190                  connector->connector_type_id);
 191         return buf;
 192 }
 193 EXPORT_SYMBOL(drm_get_connector_name);
 194
 195 char *drm_get_connector_status_name(enum drm_connector_status status)
 196 {
 197         if (status == connector_status_connected)
 198                 return "connected";
 199         else if (status == connector_status_disconnected)
 200                 return "disconnected";
 201         else
 202                 return "unknown";
 203 }
 204
 205 /**
 206  * drm_mode_object_get - allocate a new identifier
 207  * @dev: DRM device
 208  * @ptr: object pointer, used to generate unique ID
 209  * @type: object type
 210  *
 211  * LOCKING:
 212  *
 213  * Create a unique identifier based on @ptr in @dev's identifier space.  Used
 214  * for tracking modes, CRTCs and connectors.
 215  *
 216  * RETURNS:
 217  * New unique (relative to other objects in @dev) integer identifier for the
 218  * object.
 219  */
 220 static int drm_mode_object_get(struct drm_device *dev,
 221                                struct drm_mode_object *obj, uint32_t obj_type)
 222 {
 223         int new_id = 0;
 224         int ret;
 225
 226 again:
 227         if (idr_pre_get(&dev->mode_config.crtc_idr, GFP_KERNEL) == 0) {
 228                 DRM_ERROR("Ran out memory getting a mode number\n");
 229                 return -ENOMEM;
 230         }
 231
 232         mutex_lock(&dev->mode_config.idr_mutex);
 233         ret = idr_get_new_above(&dev->mode_config.crtc_idr, obj, 1, &new_id);
 234         mutex_unlock(&dev->mode_config.idr_mutex);
 235         if (ret == -EAGAIN)
 236                 goto again;
 237         else if (ret)
 238                 return ret;
 239
 240         obj->id = new_id;
 241         obj->type = obj_type;
 242         return 0;
 243 }
 244
 245 /**
 246  * drm_mode_object_put - free an identifer
 247  * @dev: DRM device
 248  * @id: ID to free
 249  *
 250  * LOCKING:
 251  * Caller must hold DRM mode_config lock.
 252  *
 253  * Free @id from @dev's unique identifier pool.
 254  */
 255 static void drm_mode_object_put(struct drm_device *dev,
 256                                 struct drm_mode_object *object)
 257 {
 258         mutex_lock(&dev->mode_config.idr_mutex);
 259         idr_remove(&dev->mode_config.crtc_idr, object->id);
 260         mutex_unlock(&dev->mode_config.idr_mutex);
 261 }
 262
 263 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
 264                 uint32_t id, uint32_t type)
 265 {
 266         struct drm_mode_object *obj = NULL;
 267
 268         mutex_lock(&dev->mode_config.idr_mutex);
 269         obj = idr_find(&dev->mode_config.crtc_idr, id);
 270         if (!obj || (obj->type != type) || (obj->id != id))
 271                 obj = NULL;
 272         mutex_unlock(&dev->mode_config.idr_mutex);
 273
 274         return obj;
 275 }
 276 EXPORT_SYMBOL(drm_mode_object_find);
 277
 278 /**
 279  * drm_framebuffer_init - initialize a framebuffer
 280  * @dev: DRM device
 281  *
 282  * LOCKING:
 283  * Caller must hold mode config lock.
 284  *
 285  * Allocates an ID for the framebuffer's parent mode object, sets its mode
 286  * functions & device file and adds it to the master fd list.
 287  *
 288  * RETURNS:
 289  * Zero on success, error code on failure.
 290  */
 291 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
 292                          const struct drm_framebuffer_funcs *funcs)
 293 {
 294         int ret;
 295
 296         kref_init(&fb->refcount);
 297
 298         ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
 299         if (ret)
 300                 return ret;
 301
 302         fb->dev = dev;
 303         fb->funcs = funcs;
 304         dev->mode_config.num_fb++;
 305         list_add(&fb->head, &dev->mode_config.fb_list);
 306
 307         return 0;
 308 }
 309 EXPORT_SYMBOL(drm_framebuffer_init);
 310
 311 static void drm_framebuffer_free(struct kref *kref)
 312 {
 313         struct drm_framebuffer *fb =
 314                         container_of(kref, struct drm_framebuffer, refcount);
 315         fb->funcs->destroy(fb);
 316 }
 317
 318 /**
 319  * drm_framebuffer_unreference - unref a framebuffer
 320  *
 321  * LOCKING:
 322  * Caller must hold mode config lock.
 323  */
 324 void drm_framebuffer_unreference(struct drm_framebuffer *fb)
 325 {
 326         struct drm_device *dev = fb->dev;
 327         DRM_DEBUG("FB ID: %d\n", fb->base.id);
 328         WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
 329         kref_put(&fb->refcount, drm_framebuffer_free);
 330 }
 331 EXPORT_SYMBOL(drm_framebuffer_unreference);
 332
 333 /**
 334  * drm_framebuffer_reference - incr the fb refcnt
 335  */
 336 void drm_framebuffer_reference(struct drm_framebuffer *fb)
 337 {
 338         DRM_DEBUG("FB ID: %d\n", fb->base.id);
 339         kref_get(&fb->refcount);
 340 }
 341 EXPORT_SYMBOL(drm_framebuffer_reference);
 342
 343 /**
 344  * drm_framebuffer_cleanup - remove a framebuffer object
 345  * @fb: framebuffer to remove
 346  *
 347  * LOCKING:
 348  * Caller must hold mode config lock.
 349  *
 350  * Scans all the CRTCs in @dev's mode_config.  If they're using @fb, removes
 351  * it, setting it to NULL.
 352  */
 353 void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
 354 {
 355         struct drm_device *dev = fb->dev;
 356         /*
 357          * This could be moved to drm_framebuffer_remove(), but for
 358          * debugging is nice to keep around the list of fb's that are
 359          * no longer associated w/ a drm_file but are not unreferenced
 360          * yet.  (i915 and omapdrm have debugfs files which will show
 361          * this.)
 362          */
 363         drm_mode_object_put(dev, &fb->base);
 364         list_del(&fb->head);
 365         dev->mode_config.num_fb--;
 366 }
 367 EXPORT_SYMBOL(drm_framebuffer_cleanup);
 368
 369 /**
 370  * drm_framebuffer_remove - remove and unreference a framebuffer object
 371  * @fb: framebuffer to remove
 372  *
 373  * LOCKING:
 374  * Caller must hold mode config lock.
 375  *
 376  * Scans all the CRTCs and planes in @dev's mode_config.  If they're
 377  * using @fb, removes it, setting it to NULL.
 378  */
 379 void drm_framebuffer_remove(struct drm_framebuffer *fb)
 380 {
 381         struct drm_device *dev = fb->dev;
 382         struct drm_crtc *crtc;
 383         struct drm_plane *plane;
 384         struct drm_mode_set set;
 385         int ret;
 386
 387         /* remove from any CRTC */
 388         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 389                 if (crtc->fb == fb) {
 390                         /* should turn off the crtc */
 391                         memset(&set, 0, sizeof(struct drm_mode_set));
 392                         set.crtc = crtc;
 393                         set.fb = NULL;
 394                         ret = crtc->funcs->set_config(&set);
 395                         if (ret)
 396                                 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
 397                 }
 398         }
 399
 400         list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
 401                 if (plane->fb == fb) {
 402                         /* should turn off the crtc */
 403                         ret = plane->funcs->disable_plane(plane);
 404                         if (ret)
 405                                 DRM_ERROR("failed to disable plane with busy fb\n");
 406                         /* disconnect the plane from the fb and crtc: */
 407                         plane->fb = NULL;
 408                         plane->crtc = NULL;
 409                 }
 410         }
 411
 412         list_del(&fb->filp_head);
 413
 414         drm_framebuffer_unreference(fb);
 415 }
 416 EXPORT_SYMBOL(drm_framebuffer_remove);
 417
 418 /**
 419  * drm_crtc_init - Initialise a new CRTC object
 420  * @dev: DRM device
 421  * @crtc: CRTC object to init
 422  * @funcs: callbacks for the new CRTC
 423  *
 424  * LOCKING:
 425  * Takes mode_config lock.
 426  *
 427  * Inits a new object created as base part of an driver crtc object.
 428  *
 429  * RETURNS:
 430  * Zero on success, error code on failure.
 431  */
 432 int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
 433                    const struct drm_crtc_funcs *funcs)
 434 {
 435         int ret;
 436
 437         crtc->dev = dev;
 438         crtc->funcs = funcs;
 439         crtc->invert_dimensions = false;
 440
 441         mutex_lock(&dev->mode_config.mutex);
 442
 443         ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
 444         if (ret)
 445                 goto out;
 446
 447         crtc->base.properties = &crtc->properties;
 448
 449         list_add_tail(&crtc->head, &dev->mode_config.crtc_list);
 450         dev->mode_config.num_crtc++;
 451
 452  out:
 453         mutex_unlock(&dev->mode_config.mutex);
 454
 455         return ret;
 456 }
 457 EXPORT_SYMBOL(drm_crtc_init);
 458
 459 /**
 460  * drm_crtc_cleanup - Cleans up the core crtc usage.
 461  * @crtc: CRTC to cleanup
 462  *
 463  * LOCKING:
 464  * Caller must hold mode config lock.
 465  *
 466  * Cleanup @crtc. Removes from drm modesetting space
 467  * does NOT free object, caller does that.
 468  */
 469 void drm_crtc_cleanup(struct drm_crtc *crtc)
 470 {
 471         struct drm_device *dev = crtc->dev;
 472
 473         if (crtc->gamma_store) {
 474                 kfree(crtc->gamma_store);
 475                 crtc->gamma_store = NULL;
 476         }
 477
 478         drm_mode_object_put(dev, &crtc->base);
 479         list_del(&crtc->head);
 480         dev->mode_config.num_crtc--;
 481 }
 482 EXPORT_SYMBOL(drm_crtc_cleanup);
 483
 484 /**
 485  * drm_mode_probed_add - add a mode to a connector's probed mode list
 486  * @connector: connector the new mode
 487  * @mode: mode data
 488  *
 489  * LOCKING:
 490  * Caller must hold mode config lock.
 491  *
 492  * Add @mode to @connector's mode list for later use.
 493  */
 494 void drm_mode_probed_add(struct drm_connector *connector,
 495                          struct drm_display_mode *mode)
 496 {
 497         list_add(&mode->head, &connector->probed_modes);
 498 }
 499 EXPORT_SYMBOL(drm_mode_probed_add);
 500
 501 /**
 502  * drm_mode_remove - remove and free a mode
 503  * @connector: connector list to modify
 504  * @mode: mode to remove
 505  *
 506  * LOCKING:
 507  * Caller must hold mode config lock.
 508  *
 509  * Remove @mode from @connector's mode list, then free it.
 510  */
 511 void drm_mode_remove(struct drm_connector *connector,
 512                      struct drm_display_mode *mode)
 513 {
 514         list_del(&mode->head);
 515         drm_mode_destroy(connector->dev, mode);
 516 }
 517 EXPORT_SYMBOL(drm_mode_remove);
 518
 519 /**
 520  * drm_connector_init - Init a preallocated connector
 521  * @dev: DRM device
 522  * @connector: the connector to init
 523  * @funcs: callbacks for this connector
 524  * @name: user visible name of the connector
 525  *
 526  * LOCKING:
 527  * Takes mode config lock.
 528  *
 529  * Initialises a preallocated connector. Connectors should be
 530  * subclassed as part of driver connector objects.
 531  *
 532  * RETURNS:
 533  * Zero on success, error code on failure.
 534  */
 535 int drm_connector_init(struct drm_device *dev,
 536                        struct drm_connector *connector,
 537                        const struct drm_connector_funcs *funcs,
 538                        int connector_type)
 539 {
 540         int ret;
 541
 542         mutex_lock(&dev->mode_config.mutex);
 543
 544         ret = drm_mode_object_get(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR);
 545         if (ret)
 546                 goto out;
 547
 548         connector->base.properties = &connector->properties;
 549         connector->dev = dev;
 550         connector->funcs = funcs;
 551         connector->connector_type = connector_type;
 552         connector->connector_type_id =
 553                 ++drm_connector_enum_list[connector_type].count; /* TODO */
 554         INIT_LIST_HEAD(&connector->user_modes);
 555         INIT_LIST_HEAD(&connector->probed_modes);
 556         INIT_LIST_HEAD(&connector->modes);
 557         connector->edid_blob_ptr = NULL;
 558
 559         list_add_tail(&connector->head, &dev->mode_config.connector_list);
 560         dev->mode_config.num_connector++;
 561
 562         if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
 563                 drm_connector_attach_property(connector,
 564                                               dev->mode_config.edid_property,
 565                                               0);
 566
 567         drm_connector_attach_property(connector,
 568                                       dev->mode_config.dpms_property, 0);
 569
 570  out:
 571         mutex_unlock(&dev->mode_config.mutex);
 572
 573         return ret;
 574 }
 575 EXPORT_SYMBOL(drm_connector_init);
 576
 577 /**
 578  * drm_connector_cleanup - cleans up an initialised connector
 579  * @connector: connector to cleanup
 580  *
 581  * LOCKING:
 582  * Takes mode config lock.
 583  *
 584  * Cleans up the connector but doesn't free the object.
 585  */
 586 void drm_connector_cleanup(struct drm_connector *connector)
 587 {
 588         struct drm_device *dev = connector->dev;
 589         struct drm_display_mode *mode, *t;
 590
 591         list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
 592                 drm_mode_remove(connector, mode);
 593
 594         list_for_each_entry_safe(mode, t, &connector->modes, head)
 595                 drm_mode_remove(connector, mode);
 596
 597         list_for_each_entry_safe(mode, t, &connector->user_modes, head)
 598                 drm_mode_remove(connector, mode);
 599
 600         mutex_lock(&dev->mode_config.mutex);
 601         drm_mode_object_put(dev, &connector->base);
 602         list_del(&connector->head);
 603         dev->mode_config.num_connector--;
 604         mutex_unlock(&dev->mode_config.mutex);
 605 }
 606 EXPORT_SYMBOL(drm_connector_cleanup);
 607
 608 void drm_connector_unplug_all(struct drm_device *dev)
 609 {
 610         struct drm_connector *connector;
 611
 612         /* taking the mode config mutex ends up in a clash with sysfs */
 613         list_for_each_entry(connector, &dev->mode_config.connector_list, head)
 614                 drm_sysfs_connector_remove(connector);
 615
 616 }
 617 EXPORT_SYMBOL(drm_connector_unplug_all);
 618
 619 int drm_encoder_init(struct drm_device *dev,
 620                       struct drm_encoder *encoder,
 621                       const struct drm_encoder_funcs *funcs,
 622                       int encoder_type)
 623 {
 624         int ret;
 625
 626         mutex_lock(&dev->mode_config.mutex);
 627
 628         ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
 629         if (ret)
 630                 goto out;
 631
 632         encoder->dev = dev;
 633         encoder->encoder_type = encoder_type;
 634         encoder->funcs = funcs;
 635
 636         list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
 637         dev->mode_config.num_encoder++;
 638
 639  out:
 640         mutex_unlock(&dev->mode_config.mutex);
 641
 642         return ret;
 643 }
 644 EXPORT_SYMBOL(drm_encoder_init);
 645
 646 void drm_encoder_cleanup(struct drm_encoder *encoder)
 647 {
 648         struct drm_device *dev = encoder->dev;
 649         mutex_lock(&dev->mode_config.mutex);
 650         drm_mode_object_put(dev, &encoder->base);
 651         list_del(&encoder->head);
 652         dev->mode_config.num_encoder--;
 653         mutex_unlock(&dev->mode_config.mutex);
 654 }
 655 EXPORT_SYMBOL(drm_encoder_cleanup);
 656
 657 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
 658                    unsigned long possible_crtcs,
 659                    const struct drm_plane_funcs *funcs,
 660                    const uint32_t *formats, uint32_t format_count,
 661                    bool priv)
 662 {
 663         int ret;
 664
 665         mutex_lock(&dev->mode_config.mutex);
 666
 667         ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
 668         if (ret)
 669                 goto out;
 670
 671         plane->base.properties = &plane->properties;
 672         plane->dev = dev;
 673         plane->funcs = funcs;
 674         plane->format_types = kmalloc(sizeof(uint32_t) * format_count,
 675                                       GFP_KERNEL);
 676         if (!plane->format_types) {
 677                 DRM_DEBUG_KMS("out of memory when allocating plane\n");
 678                 drm_mode_object_put(dev, &plane->base);
 679                 ret = -ENOMEM;
 680                 goto out;
 681         }
 682
 683         memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
 684         plane->format_count = format_count;
 685         plane->possible_crtcs = possible_crtcs;
 686
 687         /* private planes are not exposed to userspace, but depending on
 688          * display hardware, might be convenient to allow sharing programming
 689          * for the scanout engine with the crtc implementation.
 690          */
 691         if (!priv) {
 692                 list_add_tail(&plane->head, &dev->mode_config.plane_list);
 693                 dev->mode_config.num_plane++;
 694         } else {
 695                 INIT_LIST_HEAD(&plane->head);
 696         }
 697
 698  out:
 699         mutex_unlock(&dev->mode_config.mutex);
 700
 701         return ret;
 702 }
 703 EXPORT_SYMBOL(drm_plane_init);
 704
 705 void drm_plane_cleanup(struct drm_plane *plane)
 706 {
 707         struct drm_device *dev = plane->dev;
 708
 709         mutex_lock(&dev->mode_config.mutex);
 710         kfree(plane->format_types);
 711         drm_mode_object_put(dev, &plane->base);
 712         /* if not added to a list, it must be a private plane */
 713         if (!list_empty(&plane->head)) {
 714                 list_del(&plane->head);
 715                 dev->mode_config.num_plane--;
 716         }
 717         mutex_unlock(&dev->mode_config.mutex);
 718 }
 719 EXPORT_SYMBOL(drm_plane_cleanup);
 720
 721 /**
 722  * drm_mode_create - create a new display mode
 723  * @dev: DRM device
 724  *
 725  * LOCKING:
 726  * Caller must hold DRM mode_config lock.
 727  *
 728  * Create a new drm_display_mode, give it an ID, and return it.
 729  *
 730  * RETURNS:
 731  * Pointer to new mode on success, NULL on error.
 732  */
 733 struct drm_display_mode *drm_mode_create(struct drm_device *dev)
 734 {
 735         struct drm_display_mode *nmode;
 736
 737         nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL);
 738         if (!nmode)
 739                 return NULL;
 740
 741         if (drm_mode_object_get(dev, &nmode->base, DRM_MODE_OBJECT_MODE)) {
 742                 kfree(nmode);
 743                 return NULL;
 744         }
 745
 746         return nmode;
 747 }
 748 EXPORT_SYMBOL(drm_mode_create);
 749
 750 /**
 751  * drm_mode_destroy - remove a mode
 752  * @dev: DRM device
 753  * @mode: mode to remove
 754  *
 755  * LOCKING:
 756  * Caller must hold mode config lock.
 757  *
 758  * Free @mode's unique identifier, then free it.
 759  */
 760 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode)
 761 {
 762         if (!mode)
 763                 return;
 764
 765         drm_mode_object_put(dev, &mode->base);
 766
 767         kfree(mode);
 768 }
 769 EXPORT_SYMBOL(drm_mode_destroy);
 770
 771 static int drm_mode_create_standard_connector_properties(struct drm_device *dev)
 772 {
 773         struct drm_property *edid;
 774         struct drm_property *dpms;
 775
 776         /*
 777          * Standard properties (apply to all connectors)
 778          */
 779         edid = drm_property_create(dev, DRM_MODE_PROP_BLOB |
 780                                    DRM_MODE_PROP_IMMUTABLE,
 781                                    "EDID", 0);
 782         dev->mode_config.edid_property = edid;
 783
 784         dpms = drm_property_create_enum(dev, 0,
 785                                    "DPMS", drm_dpms_enum_list,
 786                                    ARRAY_SIZE(drm_dpms_enum_list));
 787         dev->mode_config.dpms_property = dpms;
 788
 789         return 0;
 790 }
 791
 792 /**
 793  * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
 794  * @dev: DRM device
 795  *
 796  * Called by a driver the first time a DVI-I connector is made.
 797  */
 798 int drm_mode_create_dvi_i_properties(struct drm_device *dev)
 799 {
 800         struct drm_property *dvi_i_selector;
 801         struct drm_property *dvi_i_subconnector;
 802
 803         if (dev->mode_config.dvi_i_select_subconnector_property)
 804                 return 0;
 805
 806         dvi_i_selector =
 807                 drm_property_create_enum(dev, 0,
 808                                     "select subconnector",
 809                                     drm_dvi_i_select_enum_list,
 810                                     ARRAY_SIZE(drm_dvi_i_select_enum_list));
 811         dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
 812
 813         dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
 814                                     "subconnector",
 815                                     drm_dvi_i_subconnector_enum_list,
 816                                     ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
 817         dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
 818
 819         return 0;
 820 }
 821 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
 822
 823 /**
 824  * drm_create_tv_properties - create TV specific connector properties
 825  * @dev: DRM device
 826  * @num_modes: number of different TV formats (modes) supported
 827  * @modes: array of pointers to strings containing name of each format
 828  *
 829  * Called by a driver's TV initialization routine, this function creates
 830  * the TV specific connector properties for a given device.  Caller is
 831  * responsible for allocating a list of format names and passing them to
 832  * this routine.
 833  */
 834 int drm_mode_create_tv_properties(struct drm_device *dev, int num_modes,
 835                                   char *modes[])
 836 {
 837         struct drm_property *tv_selector;
 838         struct drm_property *tv_subconnector;
 839         int i;
 840
 841         if (dev->mode_config.tv_select_subconnector_property)
 842                 return 0;
 843
 844         /*
 845          * Basic connector properties
 846          */
 847         tv_selector = drm_property_create_enum(dev, 0,
 848                                           "select subconnector",
 849                                           drm_tv_select_enum_list,
 850                                           ARRAY_SIZE(drm_tv_select_enum_list));
 851         dev->mode_config.tv_select_subconnector_property = tv_selector;
 852
 853         tv_subconnector =
 854                 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
 855                                     "subconnector",
 856                                     drm_tv_subconnector_enum_list,
 857                                     ARRAY_SIZE(drm_tv_subconnector_enum_list));
 858         dev->mode_config.tv_subconnector_property = tv_subconnector;
 859
 860         /*
 861          * Other, TV specific properties: margins & TV modes.
 862          */
 863         dev->mode_config.tv_left_margin_property =
 864                 drm_property_create_range(dev, 0, "left margin", 0, 100);
 865
 866         dev->mode_config.tv_right_margin_property =
 867                 drm_property_create_range(dev, 0, "right margin", 0, 100);
 868
 869         dev->mode_config.tv_top_margin_property =
 870                 drm_property_create_range(dev, 0, "top margin", 0, 100);
 871
 872         dev->mode_config.tv_bottom_margin_property =
 873                 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
 874
 875         dev->mode_config.tv_mode_property =
 876                 drm_property_create(dev, DRM_MODE_PROP_ENUM,
 877                                     "mode", num_modes);
 878         for (i = 0; i < num_modes; i++)
 879                 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
 880                                       i, modes[i]);
 881
 882         dev->mode_config.tv_brightness_property =
 883                 drm_property_create_range(dev, 0, "brightness", 0, 100);
 884
 885         dev->mode_config.tv_contrast_property =
 886                 drm_property_create_range(dev, 0, "contrast", 0, 100);
 887
 888         dev->mode_config.tv_flicker_reduction_property =
 889                 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
 890
 891         dev->mode_config.tv_overscan_property =
 892                 drm_property_create_range(dev, 0, "overscan", 0, 100);
 893
 894         dev->mode_config.tv_saturation_property =
 895                 drm_property_create_range(dev, 0, "saturation", 0, 100);
 896
 897         dev->mode_config.tv_hue_property =
 898                 drm_property_create_range(dev, 0, "hue", 0, 100);
 899
 900         return 0;
 901 }
 902 EXPORT_SYMBOL(drm_mode_create_tv_properties);
 903
 904 /**
 905  * drm_mode_create_scaling_mode_property - create scaling mode property
 906  * @dev: DRM device
 907  *
 908  * Called by a driver the first time it's needed, must be attached to desired
 909  * connectors.
 910  */
 911 int drm_mode_create_scaling_mode_property(struct drm_device *dev)
 912 {
 913         struct drm_property *scaling_mode;
 914
 915         if (dev->mode_config.scaling_mode_property)
 916                 return 0;
 917
 918         scaling_mode =
 919                 drm_property_create_enum(dev, 0, "scaling mode",
 920                                 drm_scaling_mode_enum_list,
 921                                     ARRAY_SIZE(drm_scaling_mode_enum_list));
 922
 923         dev->mode_config.scaling_mode_property = scaling_mode;
 924
 925         return 0;
 926 }
 927 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
 928
 929 /**
 930  * drm_mode_create_dithering_property - create dithering property
 931  * @dev: DRM device
 932  *
 933  * Called by a driver the first time it's needed, must be attached to desired
 934  * connectors.
 935  */
 936 int drm_mode_create_dithering_property(struct drm_device *dev)
 937 {
 938         struct drm_property *dithering_mode;
 939
 940         if (dev->mode_config.dithering_mode_property)
 941                 return 0;
 942
 943         dithering_mode =
 944                 drm_property_create_enum(dev, 0, "dithering",
 945                                 drm_dithering_mode_enum_list,
 946                                     ARRAY_SIZE(drm_dithering_mode_enum_list));
 947         dev->mode_config.dithering_mode_property = dithering_mode;
 948
 949         return 0;
 950 }
 951 EXPORT_SYMBOL(drm_mode_create_dithering_property);
 952
 953 /**
 954  * drm_mode_create_dirty_property - create dirty property
 955  * @dev: DRM device
 956  *
 957  * Called by a driver the first time it's needed, must be attached to desired
 958  * connectors.
 959  */
 960 int drm_mode_create_dirty_info_property(struct drm_device *dev)
 961 {
 962         struct drm_property *dirty_info;
 963
 964         if (dev->mode_config.dirty_info_property)
 965                 return 0;
 966
 967         dirty_info =
 968                 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
 969                                     "dirty",
 970                                     drm_dirty_info_enum_list,
 971                                     ARRAY_SIZE(drm_dirty_info_enum_list));
 972         dev->mode_config.dirty_info_property = dirty_info;
 973
 974         return 0;
 975 }
 976 EXPORT_SYMBOL(drm_mode_create_dirty_info_property);
 977
 978 /**
 979  * drm_mode_config_init - initialize DRM mode_configuration structure
 980  * @dev: DRM device
 981  *
 982  * LOCKING:
 983  * None, should happen single threaded at init time.
 984  *
 985  * Initialize @dev's mode_config structure, used for tracking the graphics
 986  * configuration of @dev.
 987  */
 988 void drm_mode_config_init(struct drm_device *dev)
 989 {
 990         mutex_init(&dev->mode_config.mutex);
 991         mutex_init(&dev->mode_config.idr_mutex);
 992         INIT_LIST_HEAD(&dev->mode_config.fb_list);
 993         INIT_LIST_HEAD(&dev->mode_config.crtc_list);
 994         INIT_LIST_HEAD(&dev->mode_config.connector_list);
 995         INIT_LIST_HEAD(&dev->mode_config.encoder_list);
 996         INIT_LIST_HEAD(&dev->mode_config.property_list);
 997         INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
 998         INIT_LIST_HEAD(&dev->mode_config.plane_list);
 999         idr_init(&dev->mode_config.crtc_idr);
1000
1001         mutex_lock(&dev->mode_config.mutex);
1002         drm_mode_create_standard_connector_properties(dev);
1003         mutex_unlock(&dev->mode_config.mutex);
1004
1005         /* Just to be sure */
1006         dev->mode_config.num_fb = 0;
1007         dev->mode_config.num_connector = 0;
1008         dev->mode_config.num_crtc = 0;
1009         dev->mode_config.num_encoder = 0;
1010 }
1011 EXPORT_SYMBOL(drm_mode_config_init);
1012
1013 int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group)
1014 {
1015         uint32_t total_objects = 0;
1016
1017         total_objects += dev->mode_config.num_crtc;
1018         total_objects += dev->mode_config.num_connector;
1019         total_objects += dev->mode_config.num_encoder;
1020
1021         group->id_list = kzalloc(total_objects * sizeof(uint32_t), GFP_KERNEL);
1022         if (!group->id_list)
1023                 return -ENOMEM;
1024
1025         group->num_crtcs = 0;
1026         group->num_connectors = 0;
1027         group->num_encoders = 0;
1028         return 0;
1029 }
1030
1031 int drm_mode_group_init_legacy_group(struct drm_device *dev,
1032                                      struct drm_mode_group *group)
1033 {
1034         struct drm_crtc *crtc;
1035         struct drm_encoder *encoder;
1036         struct drm_connector *connector;
1037         int ret;
1038
1039         if ((ret = drm_mode_group_init(dev, group)))
1040                 return ret;
1041
1042         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
1043                 group->id_list[group->num_crtcs++] = crtc->base.id;
1044
1045         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
1046                 group->id_list[group->num_crtcs + group->num_encoders++] =
1047                 encoder->base.id;
1048
1049         list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1050                 group->id_list[group->num_crtcs + group->num_encoders +
1051                                group->num_connectors++] = connector->base.id;
1052
1053         return 0;
1054 }
1055 EXPORT_SYMBOL(drm_mode_group_init_legacy_group);
1056
1057 /**
1058  * drm_mode_config_cleanup - free up DRM mode_config info
1059  * @dev: DRM device
1060  *
1061  * LOCKING:
1062  * Caller must hold mode config lock.
1063  *
1064  * Free up all the connectors and CRTCs associated with this DRM device, then
1065  * free up the framebuffers and associated buffer objects.
1066  *
1067  * FIXME: cleanup any dangling user buffer objects too
1068  */
1069 void drm_mode_config_cleanup(struct drm_device *dev)
1070 {
1071         struct drm_connector *connector, *ot;
1072         struct drm_crtc *crtc, *ct;
1073         struct drm_encoder *encoder, *enct;
1074         struct drm_framebuffer *fb, *fbt;
1075         struct drm_property *property, *pt;
1076         struct drm_plane *plane, *plt;
1077
1078         list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
1079                                  head) {
1080                 encoder->funcs->destroy(encoder);
1081         }
1082
1083         list_for_each_entry_safe(connector, ot,
1084                                  &dev->mode_config.connector_list, head) {
1085                 connector->funcs->destroy(connector);
1086         }
1087
1088         list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
1089                                  head) {
1090                 drm_property_destroy(dev, property);
1091         }
1092
1093         list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
1094                 drm_framebuffer_remove(fb);
1095         }
1096
1097         list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
1098                                  head) {
1099                 plane->funcs->destroy(plane);
1100         }
1101
1102         list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
1103                 crtc->funcs->destroy(crtc);
1104         }
1105
1106         idr_remove_all(&dev->mode_config.crtc_idr);
1107         idr_destroy(&dev->mode_config.crtc_idr);
1108 }
1109 EXPORT_SYMBOL(drm_mode_config_cleanup);
1110
1111 /**
1112  * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
1113  * @out: drm_mode_modeinfo struct to return to the user
1114  * @in: drm_display_mode to use
1115  *
1116  * LOCKING:
1117  * None.
1118  *
1119  * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to
1120  * the user.
1121  */
1122 static void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out,
1123                                       const struct drm_display_mode *in)
1124 {
1125         WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX ||
1126              in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX ||
1127              in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX ||
1128              in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX ||
1129              in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX,
1130              "timing values too large for mode info\n");
1131
1132         out->clock = in->clock;
1133         out->hdisplay = in->hdisplay;
1134         out->hsync_start = in->hsync_start;
1135         out->hsync_end = in->hsync_end;
1136         out->htotal = in->htotal;
1137         out->hskew = in->hskew;
1138         out->vdisplay = in->vdisplay;
1139         out->vsync_start = in->vsync_start;
1140         out->vsync_end = in->vsync_end;
1141         out->vtotal = in->vtotal;
1142         out->vscan = in->vscan;
1143         out->vrefresh = in->vrefresh;
1144         out->flags = in->flags;
1145         out->type = in->type;
1146         strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1147         out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1148 }
1149
1150 /**
1151  * drm_crtc_convert_to_umode - convert a modeinfo into a drm_display_mode
1152  * @out: drm_display_mode to return to the user
1153  * @in: drm_mode_modeinfo to use
1154  *
1155  * LOCKING:
1156  * None.
1157  *
1158  * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to
1159  * the caller.
1160  *
1161  * RETURNS:
1162  * Zero on success, errno on failure.
1163  */
1164 static int drm_crtc_convert_umode(struct drm_display_mode *out,
1165                                   const struct drm_mode_modeinfo *in)
1166 {
1167         if (in->clock > INT_MAX || in->vrefresh > INT_MAX)
1168                 return -ERANGE;
1169
1170         out->clock = in->clock;
1171         out->hdisplay = in->hdisplay;
1172         out->hsync_start = in->hsync_start;
1173         out->hsync_end = in->hsync_end;
1174         out->htotal = in->htotal;
1175         out->hskew = in->hskew;
1176         out->vdisplay = in->vdisplay;
1177         out->vsync_start = in->vsync_start;
1178         out->vsync_end = in->vsync_end;
1179         out->vtotal = in->vtotal;
1180         out->vscan = in->vscan;
1181         out->vrefresh = in->vrefresh;
1182         out->flags = in->flags;
1183         out->type = in->type;
1184         strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1185         out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1186
1187         return 0;
1188 }
1189
1190 /**
1191  * drm_mode_getresources - get graphics configuration
1192  * @inode: inode from the ioctl
1193  * @filp: file * from the ioctl
1194  * @cmd: cmd from ioctl
1195  * @arg: arg from ioctl
1196  *
1197  * LOCKING:
1198  * Takes mode config lock.
1199  *
1200  * Construct a set of configuration description structures and return
1201  * them to the user, including CRTC, connector and framebuffer configuration.
1202  *
1203  * Called by the user via ioctl.
1204  *
1205  * RETURNS:
1206  * Zero on success, errno on failure.
1207  */
1208 int drm_mode_getresources(struct drm_device *dev, void *data,
1209                           struct drm_file *file_priv)
1210 {
1211         struct drm_mode_card_res *card_res = data;
1212         struct list_head *lh;
1213         struct drm_framebuffer *fb;
1214         struct drm_connector *connector;
1215         struct drm_crtc *crtc;
1216         struct drm_encoder *encoder;
1217         int ret = 0;
1218         int connector_count = 0;
1219         int crtc_count = 0;
1220         int fb_count = 0;
1221         int encoder_count = 0;
1222         int copied = 0, i;
1223         uint32_t __user *fb_id;
1224         uint32_t __user *crtc_id;
1225         uint32_t __user *connector_id;
1226         uint32_t __user *encoder_id;
1227         struct drm_mode_group *mode_group;
1228
1229         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1230                 return -EINVAL;
1231
1232         mutex_lock(&dev->mode_config.mutex);
1233
1234         /*
1235          * For the non-control nodes we need to limit the list of resources
1236          * by IDs in the group list for this node
1237          */
1238         list_for_each(lh, &file_priv->fbs)
1239                 fb_count++;
1240
1241         mode_group = &file_priv->master->minor->mode_group;
1242         if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
1243
1244                 list_for_each(lh, &dev->mode_config.crtc_list)
1245                         crtc_count++;
1246
1247                 list_for_each(lh, &dev->mode_config.connector_list)
1248                         connector_count++;
1249
1250                 list_for_each(lh, &dev->mode_config.encoder_list)
1251                         encoder_count++;
1252         } else {
1253
1254                 crtc_count = mode_group->num_crtcs;
1255                 connector_count = mode_group->num_connectors;
1256                 encoder_count = mode_group->num_encoders;
1257         }
1258
1259         card_res->max_height = dev->mode_config.max_height;
1260         card_res->min_height = dev->mode_config.min_height;
1261         card_res->max_width = dev->mode_config.max_width;
1262         card_res->min_width = dev->mode_config.min_width;
1263
1264         /* handle this in 4 parts */
1265         /* FBs */
1266         if (card_res->count_fbs >= fb_count) {
1267                 copied = 0;
1268                 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
1269                 list_for_each_entry(fb, &file_priv->fbs, filp_head) {
1270                         if (put_user(fb->base.id, fb_id + copied)) {
1271                                 ret = -EFAULT;
1272                                 goto out;
1273                         }
1274                         copied++;
1275                 }
1276         }
1277         card_res->count_fbs = fb_count;
1278
1279         /* CRTCs */
1280         if (card_res->count_crtcs >= crtc_count) {
1281                 copied = 0;
1282                 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
1283                 if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
1284                         list_for_each_entry(crtc, &dev->mode_config.crtc_list,
1285                                             head) {
1286                                 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
1287                                 if (put_user(crtc->base.id, crtc_id + copied)) {
1288                                         ret = -EFAULT;
1289                                         goto out;
1290                                 }
1291                                 copied++;
1292                         }
1293                 } else {
1294                         for (i = 0; i < mode_group->num_crtcs; i++) {
1295                                 if (put_user(mode_group->id_list[i],
1296                                              crtc_id + copied)) {
1297                                         ret = -EFAULT;
1298                                         goto out;
1299                                 }
1300                                 copied++;
1301                         }
1302                 }
1303         }
1304         card_res->count_crtcs = crtc_count;
1305
1306         /* Encoders */
1307         if (card_res->count_encoders >= encoder_count) {
1308                 copied = 0;
1309                 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr;
1310                 if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
1311                         list_for_each_entry(encoder,
1312                                             &dev->mode_config.encoder_list,
1313                                             head) {
1314                                 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id,
1315                                                 drm_get_encoder_name(encoder));
1316                                 if (put_user(encoder->base.id, encoder_id +
1317                                              copied)) {
1318                                         ret = -EFAULT;
1319                                         goto out;
1320                                 }
1321                                 copied++;
1322                         }
1323                 } else {
1324                         for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) {
1325                                 if (put_user(mode_group->id_list[i],
1326                                              encoder_id + copied)) {
1327                                         ret = -EFAULT;
1328                                         goto out;
1329                                 }
1330                                 copied++;
1331                         }
1332
1333                 }
1334         }
1335         card_res->count_encoders = encoder_count;
1336
1337         /* Connectors */
1338         if (card_res->count_connectors >= connector_count) {
1339                 copied = 0;
1340                 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr;
1341                 if (file_priv->master->minor->type == DRM_MINOR_CONTROL) {
1342                         list_for_each_entry(connector,
1343                                             &dev->mode_config.connector_list,
1344                                             head) {
1345                                 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
1346                                         connector->base.id,
1347                                         drm_get_connector_name(connector));
1348                                 if (put_user(connector->base.id,
1349                                              connector_id + copied)) {
1350                                         ret = -EFAULT;
1351                                         goto out;
1352                                 }
1353                                 copied++;
1354                         }
1355                 } else {
1356                         int start = mode_group->num_crtcs +
1357                                 mode_group->num_encoders;
1358                         for (i = start; i < start + mode_group->num_connectors; i++) {
1359                                 if (put_user(mode_group->id_list[i],
1360                                              connector_id + copied)) {
1361                                         ret = -EFAULT;
1362                                         goto out;
1363                                 }
1364                                 copied++;
1365                         }
1366                 }
1367         }
1368         card_res->count_connectors = connector_count;
1369
1370         DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs,
1371                   card_res->count_connectors, card_res->count_encoders);
1372
1373 out:
1374         mutex_unlock(&dev->mode_config.mutex);
1375         return ret;
1376 }
1377
1378 /**
1379  * drm_mode_getcrtc - get CRTC configuration
1380  * @inode: inode from the ioctl
1381  * @filp: file * from the ioctl
1382  * @cmd: cmd from ioctl
1383  * @arg: arg from ioctl
1384  *
1385  * LOCKING:
1386  * Takes mode config lock.
1387  *
1388  * Construct a CRTC configuration structure to return to the user.
1389  *
1390  * Called by the user via ioctl.
1391  *
1392  * RETURNS:
1393  * Zero on success, errno on failure.
1394  */
1395 int drm_mode_getcrtc(struct drm_device *dev,
1396                      void *data, struct drm_file *file_priv)
1397 {
1398         struct drm_mode_crtc *crtc_resp = data;
1399         struct drm_crtc *crtc;
1400         struct drm_mode_object *obj;
1401         int ret = 0;
1402
1403         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1404                 return -EINVAL;
1405
1406         mutex_lock(&dev->mode_config.mutex);
1407
1408         obj = drm_mode_object_find(dev, crtc_resp->crtc_id,
1409                                    DRM_MODE_OBJECT_CRTC);
1410         if (!obj) {
1411                 ret = -EINVAL;
1412                 goto out;
1413         }
1414         crtc = obj_to_crtc(obj);
1415
1416         crtc_resp->x = crtc->x;
1417         crtc_resp->y = crtc->y;
1418         crtc_resp->gamma_size = crtc->gamma_size;
1419         if (crtc->fb)
1420                 crtc_resp->fb_id = crtc->fb->base.id;
1421         else
1422                 crtc_resp->fb_id = 0;
1423
1424         if (crtc->enabled) {
1425
1426                 drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->mode);
1427                 crtc_resp->mode_valid = 1;
1428
1429         } else {
1430                 crtc_resp->mode_valid = 0;
1431         }
1432
1433 out:
1434         mutex_unlock(&dev->mode_config.mutex);
1435         return ret;
1436 }
1437
1438 /**
1439  * drm_mode_getconnector - get connector configuration
1440  * @inode: inode from the ioctl
1441  * @filp: file * from the ioctl
1442  * @cmd: cmd from ioctl
1443  * @arg: arg from ioctl
1444  *
1445  * LOCKING:
1446  * Takes mode config lock.
1447  *
1448  * Construct a connector configuration structure to return to the user.
1449  *
1450  * Called by the user via ioctl.
1451  *
1452  * RETURNS:
1453  * Zero on success, errno on failure.
1454  */
1455 int drm_mode_getconnector(struct drm_device *dev, void *data,
1456                           struct drm_file *file_priv)
1457 {
1458         struct drm_mode_get_connector *out_resp = data;
1459         struct drm_mode_object *obj;
1460         struct drm_connector *connector;
1461         struct drm_display_mode *mode;
1462         int mode_count = 0;
1463         int props_count = 0;
1464         int encoders_count = 0;
1465         int ret = 0;
1466         int copied = 0;
1467         int i;
1468         struct drm_mode_modeinfo u_mode;
1469         struct drm_mode_modeinfo __user *mode_ptr;
1470         uint32_t __user *prop_ptr;
1471         uint64_t __user *prop_values;
1472         uint32_t __user *encoder_ptr;
1473
1474         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1475                 return -EINVAL;
1476
1477         memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
1478
1479         DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
1480
1481         mutex_lock(&dev->mode_config.mutex);
1482
1483         obj = drm_mode_object_find(dev, out_resp->connector_id,
1484                                    DRM_MODE_OBJECT_CONNECTOR);
1485         if (!obj) {
1486                 ret = -EINVAL;
1487                 goto out;
1488         }
1489         connector = obj_to_connector(obj);
1490
1491         props_count = connector->properties.count;
1492
1493         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1494                 if (connector->encoder_ids[i] != 0) {
1495                         encoders_count++;
1496                 }
1497         }
1498
1499         if (out_resp->count_modes == 0) {
1500                 connector->funcs->fill_modes(connector,
1501                                              dev->mode_config.max_width,
1502                                              dev->mode_config.max_height);
1503         }
1504
1505         /* delayed so we get modes regardless of pre-fill_modes state */
1506         list_for_each_entry(mode, &connector->modes, head)
1507                 mode_count++;
1508
1509         out_resp->connector_id = connector->base.id;
1510         out_resp->connector_type = connector->connector_type;
1511         out_resp->connector_type_id = connector->connector_type_id;
1512         out_resp->mm_width = connector->display_info.width_mm;
1513         out_resp->mm_height = connector->display_info.height_mm;
1514         out_resp->subpixel = connector->display_info.subpixel_order;
1515         out_resp->connection = connector->status;
1516         if (connector->encoder)
1517                 out_resp->encoder_id = connector->encoder->base.id;
1518         else
1519                 out_resp->encoder_id = 0;
1520
1521         /*
1522          * This ioctl is called twice, once to determine how much space is
1523          * needed, and the 2nd time to fill it.
1524          */
1525         if ((out_resp->count_modes >= mode_count) && mode_count) {
1526                 copied = 0;
1527                 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
1528                 list_for_each_entry(mode, &connector->modes, head) {
1529                         drm_crtc_convert_to_umode(&u_mode, mode);
1530                         if (copy_to_user(mode_ptr + copied,
1531                                          &u_mode, sizeof(u_mode))) {
1532                                 ret = -EFAULT;
1533                                 goto out;
1534                         }
1535                         copied++;
1536                 }
1537         }
1538         out_resp->count_modes = mode_count;
1539
1540         if ((out_resp->count_props >= props_count) && props_count) {
1541                 copied = 0;
1542                 prop_ptr = (uint32_t __user *)(unsigned long)(out_resp->props_ptr);
1543                 prop_values = (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr);
1544                 for (i = 0; i < connector->properties.count; i++) {
1545                         if (put_user(connector->properties.ids[i],
1546                                      prop_ptr + copied)) {
1547                                 ret = -EFAULT;
1548                                 goto out;
1549                         }
1550
1551                         if (put_user(connector->properties.values[i],
1552                                      prop_values + copied)) {
1553                                 ret = -EFAULT;
1554                                 goto out;
1555                         }
1556                         copied++;
1557                 }
1558         }
1559         out_resp->count_props = props_count;
1560
1561         if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
1562                 copied = 0;
1563                 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
1564                 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1565                         if (connector->encoder_ids[i] != 0) {
1566                                 if (put_user(connector->encoder_ids[i],
1567                                              encoder_ptr + copied)) {
1568                                         ret = -EFAULT;
1569                                         goto out;
1570                                 }
1571                                 copied++;
1572                         }
1573                 }
1574         }
1575         out_resp->count_encoders = encoders_count;
1576
1577 out:
1578         mutex_unlock(&dev->mode_config.mutex);
1579         return ret;
1580 }
1581
1582 int drm_mode_getencoder(struct drm_device *dev, void *data,
1583                         struct drm_file *file_priv)
1584 {
1585         struct drm_mode_get_encoder *enc_resp = data;
1586         struct drm_mode_object *obj;
1587         struct drm_encoder *encoder;
1588         int ret = 0;
1589
1590         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1591                 return -EINVAL;
1592
1593         mutex_lock(&dev->mode_config.mutex);
1594         obj = drm_mode_object_find(dev, enc_resp->encoder_id,
1595                                    DRM_MODE_OBJECT_ENCODER);
1596         if (!obj) {
1597                 ret = -EINVAL;
1598                 goto out;
1599         }
1600         encoder = obj_to_encoder(obj);
1601
1602         if (encoder->crtc)
1603                 enc_resp->crtc_id = encoder->crtc->base.id;
1604         else
1605                 enc_resp->crtc_id = 0;
1606         enc_resp->encoder_type = encoder->encoder_type;
1607         enc_resp->encoder_id = encoder->base.id;
1608         enc_resp->possible_crtcs = encoder->possible_crtcs;
1609         enc_resp->possible_clones = encoder->possible_clones;
1610
1611 out:
1612         mutex_unlock(&dev->mode_config.mutex);
1613         return ret;
1614 }
1615
1616 /**
1617  * drm_mode_getplane_res - get plane info
1618  * @dev: DRM device
1619  * @data: ioctl data
1620  * @file_priv: DRM file info
1621  *
1622  * LOCKING:
1623  * Takes mode config lock.
1624  *
1625  * Return an plane count and set of IDs.
1626  */
1627 int drm_mode_getplane_res(struct drm_device *dev, void *data,
1628                             struct drm_file *file_priv)
1629 {
1630         struct drm_mode_get_plane_res *plane_resp = data;
1631         struct drm_mode_config *config;
1632         struct drm_plane *plane;
1633         uint32_t __user *plane_ptr;
1634         int copied = 0, ret = 0;
1635
1636         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1637                 return -EINVAL;
1638
1639         mutex_lock(&dev->mode_config.mutex);
1640         config = &dev->mode_config;
1641
1642         /*
1643          * This ioctl is called twice, once to determine how much space is
1644          * needed, and the 2nd time to fill it.
1645          */
1646         if (config->num_plane &&
1647             (plane_resp->count_planes >= config->num_plane)) {
1648                 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr;
1649
1650                 list_for_each_entry(plane, &config->plane_list, head) {
1651                         if (put_user(plane->base.id, plane_ptr + copied)) {
1652                                 ret = -EFAULT;
1653                                 goto out;
1654                         }
1655                         copied++;
1656                 }
1657         }
1658         plane_resp->count_planes = config->num_plane;
1659
1660 out:
1661         mutex_unlock(&dev->mode_config.mutex);
1662         return ret;
1663 }
1664
1665 /**
1666  * drm_mode_getplane - get plane info
1667  * @dev: DRM device
1668  * @data: ioctl data
1669  * @file_priv: DRM file info
1670  *
1671  * LOCKING:
1672  * Takes mode config lock.
1673  *
1674  * Return plane info, including formats supported, gamma size, any
1675  * current fb, etc.
1676  */
1677 int drm_mode_getplane(struct drm_device *dev, void *data,
1678                         struct drm_file *file_priv)
1679 {
1680         struct drm_mode_get_plane *plane_resp = data;
1681         struct drm_mode_object *obj;
1682         struct drm_plane *plane;
1683         uint32_t __user *format_ptr;
1684         int ret = 0;
1685
1686         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1687                 return -EINVAL;
1688
1689         mutex_lock(&dev->mode_config.mutex);
1690         obj = drm_mode_object_find(dev, plane_resp->plane_id,
1691                                    DRM_MODE_OBJECT_PLANE);
1692         if (!obj) {
1693                 ret = -ENOENT;
1694                 goto out;
1695         }
1696         plane = obj_to_plane(obj);
1697
1698         if (plane->crtc)
1699                 plane_resp->crtc_id = plane->crtc->base.id;
1700         else
1701                 plane_resp->crtc_id = 0;
1702
1703         if (plane->fb)
1704                 plane_resp->fb_id = plane->fb->base.id;
1705         else
1706                 plane_resp->fb_id = 0;
1707
1708         plane_resp->plane_id = plane->base.id;
1709         plane_resp->possible_crtcs = plane->possible_crtcs;
1710         plane_resp->gamma_size = plane->gamma_size;
1711
1712         /*
1713          * This ioctl is called twice, once to determine how much space is
1714          * needed, and the 2nd time to fill it.
1715          */
1716         if (plane->format_count &&
1717             (plane_resp->count_format_types >= plane->format_count)) {
1718                 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
1719                 if (copy_to_user(format_ptr,
1720                                  plane->format_types,
1721                                  sizeof(uint32_t) * plane->format_count)) {
1722                         ret = -EFAULT;
1723                         goto out;
1724                 }
1725         }
1726         plane_resp->count_format_types = plane->format_count;
1727
1728 out:
1729         mutex_unlock(&dev->mode_config.mutex);
1730         return ret;
1731 }
1732
1733 /**
1734  * drm_mode_setplane - set up or tear down an plane
1735  * @dev: DRM device
1736  * @data: ioctl data*
1737  * @file_prive: DRM file info
1738  *
1739  * LOCKING:
1740  * Takes mode config lock.
1741  *
1742  * Set plane info, including placement, fb, scaling, and other factors.
1743  * Or pass a NULL fb to disable.
1744  */
1745 int drm_mode_setplane(struct drm_device *dev, void *data,
1746                         struct drm_file *file_priv)
1747 {
1748         struct drm_mode_set_plane *plane_req = data;
1749         struct drm_mode_object *obj;
1750         struct drm_plane *plane;
1751         struct drm_crtc *crtc;
1752         struct drm_framebuffer *fb;
1753         int ret = 0;
1754         unsigned int fb_width, fb_height;
1755         int i;
1756
1757         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1758                 return -EINVAL;
1759
1760         mutex_lock(&dev->mode_config.mutex);
1761
1762         /*
1763          * First, find the plane, crtc, and fb objects.  If not available,
1764          * we don't bother to call the driver.
1765          */
1766         obj = drm_mode_object_find(dev, plane_req->plane_id,
1767                                    DRM_MODE_OBJECT_PLANE);
1768         if (!obj) {
1769                 DRM_DEBUG_KMS("Unknown plane ID %d\n",
1770                               plane_req->plane_id);
1771                 ret = -ENOENT;
1772                 goto out;
1773         }
1774         plane = obj_to_plane(obj);
1775
1776         /* No fb means shut it down */
1777         if (!plane_req->fb_id) {
1778                 plane->funcs->disable_plane(plane);
1779                 plane->crtc = NULL;
1780                 plane->fb = NULL;
1781                 goto out;
1782         }
1783
1784         obj = drm_mode_object_find(dev, plane_req->crtc_id,
1785                                    DRM_MODE_OBJECT_CRTC);
1786         if (!obj) {
1787                 DRM_DEBUG_KMS("Unknown crtc ID %d\n",
1788                               plane_req->crtc_id);
1789                 ret = -ENOENT;
1790                 goto out;
1791         }
1792         crtc = obj_to_crtc(obj);
1793
1794         obj = drm_mode_object_find(dev, plane_req->fb_id,
1795                                    DRM_MODE_OBJECT_FB);
1796         if (!obj) {
1797                 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
1798                               plane_req->fb_id);
1799                 ret = -ENOENT;
1800                 goto out;
1801         }
1802         fb = obj_to_fb(obj);
1803
1804         /* Check whether this plane supports the fb pixel format. */
1805         for (i = 0; i < plane->format_count; i++)
1806                 if (fb->pixel_format == plane->format_types[i])
1807                         break;
1808         if (i == plane->format_count) {
1809                 DRM_DEBUG_KMS("Invalid pixel format 0x%08x\n", fb->pixel_format);
1810                 ret = -EINVAL;
1811                 goto out;
1812         }
1813
1814         fb_width = fb->width << 16;
1815         fb_height = fb->height << 16;
1816
1817         /* Make sure source coordinates are inside the fb. */
1818         if (plane_req->src_w > fb_width ||
1819             plane_req->src_x > fb_width - plane_req->src_w ||
1820             plane_req->src_h > fb_height ||
1821             plane_req->src_y > fb_height - plane_req->src_h) {
1822                 DRM_DEBUG_KMS("Invalid source coordinates "
1823                               "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
1824                               plane_req->src_w >> 16,
1825                               ((plane_req->src_w & 0xffff) * 15625) >> 10,
1826                               plane_req->src_h >> 16,
1827                               ((plane_req->src_h & 0xffff) * 15625) >> 10,
1828                               plane_req->src_x >> 16,
1829                               ((plane_req->src_x & 0xffff) * 15625) >> 10,
1830                               plane_req->src_y >> 16,
1831                               ((plane_req->src_y & 0xffff) * 15625) >> 10);
1832                 ret = -ENOSPC;
1833                 goto out;
1834         }
1835
1836         /* Give drivers some help against integer overflows */
1837         if (plane_req->crtc_w > INT_MAX ||
1838             plane_req->crtc_x > INT_MAX - (int32_t) plane_req->crtc_w ||
1839             plane_req->crtc_h > INT_MAX ||
1840             plane_req->crtc_y > INT_MAX - (int32_t) plane_req->crtc_h) {
1841                 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
1842                               plane_req->crtc_w, plane_req->crtc_h,
1843                               plane_req->crtc_x, plane_req->crtc_y);
1844                 ret = -ERANGE;
1845                 goto out;
1846         }
1847
1848         ret = plane->funcs->update_plane(plane, crtc, fb,
1849                                          plane_req->crtc_x, plane_req->crtc_y,
1850                                          plane_req->crtc_w, plane_req->crtc_h,
1851                                          plane_req->src_x, plane_req->src_y,
1852                                          plane_req->src_w, plane_req->src_h);
1853         if (!ret) {
1854                 plane->crtc = crtc;
1855                 plane->fb = fb;
1856         }
1857
1858 out:
1859         mutex_unlock(&dev->mode_config.mutex);
1860
1861         return ret;
1862 }
1863
1864 /**
1865  * drm_mode_setcrtc - set CRTC configuration
1866  * @inode: inode from the ioctl
1867  * @filp: file * from the ioctl
1868  * @cmd: cmd from ioctl
1869  * @arg: arg from ioctl
1870  *
1871  * LOCKING:
1872  * Takes mode config lock.
1873  *
1874  * Build a new CRTC configuration based on user request.
1875  *
1876  * Called by the user via ioctl.
1877  *
1878  * RETURNS:
1879  * Zero on success, errno on failure.
1880  */
1881 int drm_mode_setcrtc(struct drm_device *dev, void *data,
1882                      struct drm_file *file_priv)
1883 {
1884         struct drm_mode_config *config = &dev->mode_config;
1885         struct drm_mode_crtc *crtc_req = data;
1886         struct drm_mode_object *obj;
1887         struct drm_crtc *crtc;
1888         struct drm_connector **connector_set = NULL, *connector;
1889         struct drm_framebuffer *fb = NULL;
1890         struct drm_display_mode *mode = NULL;
1891         struct drm_mode_set set;
1892         uint32_t __user *set_connectors_ptr;
1893         int ret;
1894         int i;
1895
1896         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1897                 return -EINVAL;
1898
1899         /* For some reason crtc x/y offsets are signed internally. */
1900         if (crtc_req->x > INT_MAX || crtc_req->y > INT_MAX)
1901                 return -ERANGE;
1902
1903         mutex_lock(&dev->mode_config.mutex);
1904         obj = drm_mode_object_find(dev, crtc_req->crtc_id,
1905                                    DRM_MODE_OBJECT_CRTC);
1906         if (!obj) {
1907                 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
1908                 ret = -EINVAL;
1909                 goto out;
1910         }
1911         crtc = obj_to_crtc(obj);
1912         DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
1913
1914         if (crtc_req->mode_valid) {
1915                 int hdisplay, vdisplay;
1916                 /* If we have a mode we need a framebuffer. */
1917                 /* If we pass -1, set the mode with the currently bound fb */
1918                 if (crtc_req->fb_id == -1) {
1919                         if (!crtc->fb) {
1920                                 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
1921                                 ret = -EINVAL;
1922                                 goto out;
1923                         }
1924                         fb = crtc->fb;
1925                 } else {
1926                         obj = drm_mode_object_find(dev, crtc_req->fb_id,
1927                                                    DRM_MODE_OBJECT_FB);
1928                         if (!obj) {
1929                                 DRM_DEBUG_KMS("Unknown FB ID%d\n",
1930                                                 crtc_req->fb_id);
1931                                 ret = -EINVAL;
1932                                 goto out;
1933                         }
1934                         fb = obj_to_fb(obj);
1935                 }
1936
1937                 mode = drm_mode_create(dev);
1938                 if (!mode) {
1939                         ret = -ENOMEM;
1940                         goto out;
1941                 }
1942
1943                 ret = drm_crtc_convert_umode(mode, &crtc_req->mode);
1944                 if (ret) {
1945                         DRM_DEBUG_KMS("Invalid mode\n");
1946                         goto out;
1947                 }
1948
1949                 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1950
1951                 hdisplay = mode->hdisplay;
1952                 vdisplay = mode->vdisplay;
1953
1954                 if (crtc->invert_dimensions)
1955                         swap(hdisplay, vdisplay);
1956
1957                 if (hdisplay > fb->width ||
1958                     vdisplay > fb->height ||
1959                     crtc_req->x > fb->width - hdisplay ||
1960                     crtc_req->y > fb->height - vdisplay) {
1961                         DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n",
1962                                       fb->width, fb->height,
1963                                       hdisplay, vdisplay, crtc_req->x, crtc_req->y,
1964                                       crtc->invert_dimensions ? " (inverted)" : "");
1965                         ret = -ENOSPC;
1966                         goto out;
1967                 }
1968         }
1969
1970         if (crtc_req->count_connectors == 0 && mode) {
1971                 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
1972                 ret = -EINVAL;
1973                 goto out;
1974         }
1975
1976         if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
1977                 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
1978                           crtc_req->count_connectors);
1979                 ret = -EINVAL;
1980                 goto out;
1981         }
1982
1983         if (crtc_req->count_connectors > 0) {
1984                 u32 out_id;
1985
1986                 /* Avoid unbounded kernel memory allocation */
1987                 if (crtc_req->count_connectors > config->num_connector) {
1988                         ret = -EINVAL;
1989                         goto out;
1990                 }
1991
1992                 connector_set = kmalloc(crtc_req->count_connectors *
1993                                         sizeof(struct drm_connector *),
1994                                         GFP_KERNEL);
1995                 if (!connector_set) {
1996                         ret = -ENOMEM;
1997                         goto out;
1998                 }
1999
2000                 for (i = 0; i < crtc_req->count_connectors; i++) {
2001                         set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
2002                         if (get_user(out_id, &set_connectors_ptr[i])) {
2003                                 ret = -EFAULT;
2004                                 goto out;
2005                         }
2006
2007                         obj = drm_mode_object_find(dev, out_id,
2008                                                    DRM_MODE_OBJECT_CONNECTOR);
2009                         if (!obj) {
2010                                 DRM_DEBUG_KMS("Connector id %d unknown\n",
2011                                                 out_id);
2012                                 ret = -EINVAL;
2013                                 goto out;
2014                         }
2015                         connector = obj_to_connector(obj);
2016                         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
2017                                         connector->base.id,
2018                                         drm_get_connector_name(connector));
2019
2020                         connector_set[i] = connector;
2021                 }
2022         }
2023
2024         set.crtc = crtc;
2025         set.x = crtc_req->x;
2026         set.y = crtc_req->y;
2027         set.mode = mode;
2028         set.connectors = connector_set;
2029         set.num_connectors = crtc_req->count_connectors;
2030         set.fb = fb;
2031         ret = crtc->funcs->set_config(&set);
2032
2033 out:
2034         kfree(connector_set);
2035         drm_mode_destroy(dev, mode);
2036         mutex_unlock(&dev->mode_config.mutex);
2037         return ret;
2038 }
2039
2040 int drm_mode_cursor_ioctl(struct drm_device *dev,
2041                         void *data, struct drm_file *file_priv)
2042 {
2043         struct drm_mode_cursor *req = data;
2044         struct drm_mode_object *obj;
2045         struct drm_crtc *crtc;
2046         int ret = 0;
2047
2048         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2049                 return -EINVAL;
2050
2051         if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
2052                 return -EINVAL;
2053
2054         mutex_lock(&dev->mode_config.mutex);
2055         obj = drm_mode_object_find(dev, req->crtc_id, DRM_MODE_OBJECT_CRTC);
2056         if (!obj) {
2057                 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
2058                 ret = -EINVAL;
2059                 goto out;
2060         }
2061         crtc = obj_to_crtc(obj);
2062
2063         if (req->flags & DRM_MODE_CURSOR_BO) {
2064                 if (!crtc->funcs->cursor_set) {
2065                         ret = -ENXIO;
2066                         goto out;
2067                 }
2068                 /* Turns off the cursor if handle is 0 */
2069                 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
2070                                               req->width, req->height);
2071         }
2072
2073         if (req->flags & DRM_MODE_CURSOR_MOVE) {
2074                 if (crtc->funcs->cursor_move) {
2075                         ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
2076                 } else {
2077                         ret = -EFAULT;
2078                         goto out;
2079                 }
2080         }
2081 out:
2082         mutex_unlock(&dev->mode_config.mutex);
2083         return ret;
2084 }
2085
2086 /* Original addfb only supported RGB formats, so figure out which one */
2087 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
2088 {
2089         uint32_t fmt;
2090
2091         switch (bpp) {
2092         case 8:
2093                 fmt = DRM_FORMAT_RGB332;
2094                 break;
2095         case 16:
2096                 if (depth == 15)
2097                         fmt = DRM_FORMAT_XRGB1555;
2098                 else
2099                         fmt = DRM_FORMAT_RGB565;
2100                 break;
2101         case 24:
2102                 fmt = DRM_FORMAT_RGB888;
2103                 break;
2104         case 32:
2105                 if (depth == 24)
2106                         fmt = DRM_FORMAT_XRGB8888;
2107                 else if (depth == 30)
2108                         fmt = DRM_FORMAT_XRGB2101010;
2109                 else
2110                         fmt = DRM_FORMAT_ARGB8888;
2111                 break;
2112         default:
2113                 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n");
2114                 fmt = DRM_FORMAT_XRGB8888;
2115                 break;
2116         }
2117
2118         return fmt;
2119 }
2120 EXPORT_SYMBOL(drm_mode_legacy_fb_format);
2121
2122 /**
2123  * drm_mode_addfb - add an FB to the graphics configuration
2124  * @inode: inode from the ioctl
2125  * @filp: file * from the ioctl
2126  * @cmd: cmd from ioctl
2127  * @arg: arg from ioctl
2128  *
2129  * LOCKING:
2130  * Takes mode config lock.
2131  *
2132  * Add a new FB to the specified CRTC, given a user request.
2133  *
2134  * Called by the user via ioctl.
2135  *
2136  * RETURNS:
2137  * Zero on success, errno on failure.
2138  */
2139 int drm_mode_addfb(struct drm_device *dev,
2140                    void *data, struct drm_file *file_priv)
2141 {
2142         struct drm_mode_fb_cmd *or = data;
2143         struct drm_mode_fb_cmd2 r = {};
2144         struct drm_mode_config *config = &dev->mode_config;
2145         struct drm_framebuffer *fb;
2146         int ret = 0;
2147
2148         /* Use new struct with format internally */
2149         r.fb_id = or->fb_id;
2150         r.width = or->width;
2151         r.height = or->height;
2152         r.pitches[0] = or->pitch;
2153         r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth);
2154         r.handles[0] = or->handle;
2155
2156         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2157                 return -EINVAL;
2158
2159         if ((config->min_width > r.width) || (r.width > config->max_width))
2160                 return -EINVAL;
2161
2162         if ((config->min_height > r.height) || (r.height > config->max_height))
2163                 return -EINVAL;
2164
2165         mutex_lock(&dev->mode_config.mutex);
2166
2167         /* TODO check buffer is sufficiently large */
2168         /* TODO setup destructor callback */
2169
2170         fb = dev->mode_config.funcs->fb_create(dev, file_priv, &r);
2171         if (IS_ERR(fb)) {
2172                 DRM_DEBUG_KMS("could not create framebuffer\n");
2173                 ret = PTR_ERR(fb);
2174                 goto out;
2175         }
2176
2177         or->fb_id = fb->base.id;
2178         list_add(&fb->filp_head, &file_priv->fbs);
2179         DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
2180
2181 out:
2182         mutex_unlock(&dev->mode_config.mutex);
2183         return ret;
2184 }
2185
2186 static int format_check(const struct drm_mode_fb_cmd2 *r)
2187 {
2188         uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN;
2189
2190         switch (format) {
2191         case DRM_FORMAT_C8:
2192         case DRM_FORMAT_RGB332:
2193         case DRM_FORMAT_BGR233:
2194         case DRM_FORMAT_XRGB4444:
2195         case DRM_FORMAT_XBGR4444:
2196         case DRM_FORMAT_RGBX4444:
2197         case DRM_FORMAT_BGRX4444:
2198         case DRM_FORMAT_ARGB4444:
2199         case DRM_FORMAT_ABGR4444:
2200         case DRM_FORMAT_RGBA4444:
2201         case DRM_FORMAT_BGRA4444:
2202         case DRM_FORMAT_XRGB1555:
2203         case DRM_FORMAT_XBGR1555:
2204         case DRM_FORMAT_RGBX5551:
2205         case DRM_FORMAT_BGRX5551:
2206         case DRM_FORMAT_ARGB1555:
2207         case DRM_FORMAT_ABGR1555:
2208         case DRM_FORMAT_RGBA5551:
2209         case DRM_FORMAT_BGRA5551:
2210         case DRM_FORMAT_RGB565:
2211         case DRM_FORMAT_BGR565:
2212         case DRM_FORMAT_RGB888:
2213         case DRM_FORMAT_BGR888:
2214         case DRM_FORMAT_XRGB8888:
2215         case DRM_FORMAT_XBGR8888:
2216         case DRM_FORMAT_RGBX8888:
2217         case DRM_FORMAT_BGRX8888:
2218         case DRM_FORMAT_ARGB8888:
2219         case DRM_FORMAT_ABGR8888:
2220         case DRM_FORMAT_RGBA8888:
2221         case DRM_FORMAT_BGRA8888:
2222         case DRM_FORMAT_XRGB2101010:
2223         case DRM_FORMAT_XBGR2101010:
2224         case DRM_FORMAT_RGBX1010102:
2225         case DRM_FORMAT_BGRX1010102:
2226         case DRM_FORMAT_ARGB2101010:
2227         case DRM_FORMAT_ABGR2101010:
2228         case DRM_FORMAT_RGBA1010102:
2229         case DRM_FORMAT_BGRA1010102:
2230         case DRM_FORMAT_YUYV:
2231         case DRM_FORMAT_YVYU:
2232         case DRM_FORMAT_UYVY:
2233         case DRM_FORMAT_VYUY:
2234         case DRM_FORMAT_AYUV:
2235         case DRM_FORMAT_NV12:
2236         case DRM_FORMAT_NV21:
2237         case DRM_FORMAT_NV16:
2238         case DRM_FORMAT_NV61:
2239         case DRM_FORMAT_NV24:
2240         case DRM_FORMAT_NV42:
2241         case DRM_FORMAT_YUV410:
2242         case DRM_FORMAT_YVU410:
2243         case DRM_FORMAT_YUV411:
2244         case DRM_FORMAT_YVU411:
2245         case DRM_FORMAT_YUV420:
2246         case DRM_FORMAT_YVU420:
2247         case DRM_FORMAT_YUV422:
2248         case DRM_FORMAT_YVU422:
2249         case DRM_FORMAT_YUV444:
2250         case DRM_FORMAT_YVU444:
2251                 return 0;
2252         default:
2253                 return -EINVAL;
2254         }
2255 }
2256
2257 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
2258 {
2259         int ret, hsub, vsub, num_planes, i;
2260
2261         ret = format_check(r);
2262         if (ret) {
2263                 DRM_DEBUG_KMS("bad framebuffer format 0x%08x\n", r->pixel_format);
2264                 return ret;
2265         }
2266
2267         hsub = drm_format_horz_chroma_subsampling(r->pixel_format);
2268         vsub = drm_format_vert_chroma_subsampling(r->pixel_format);
2269         num_planes = drm_format_num_planes(r->pixel_format);
2270
2271         if (r->width == 0 || r->width % hsub) {
2272                 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->height);
2273                 return -EINVAL;
2274         }
2275
2276         if (r->height == 0 || r->height % vsub) {
2277                 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height);
2278                 return -EINVAL;
2279         }
2280
2281         for (i = 0; i < num_planes; i++) {
2282                 unsigned int width = r->width / (i != 0 ? hsub : 1);
2283
2284                 if (!r->handles[i]) {
2285                         DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i);
2286                         return -EINVAL;
2287                 }
2288
2289                 if (r->pitches[i] < drm_format_plane_cpp(r->pixel_format, i) * width) {
2290                         DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i);
2291                         return -EINVAL;
2292                 }
2293         }
2294
2295         return 0;
2296 }
2297
2298 /**
2299  * drm_mode_addfb2 - add an FB to the graphics configuration
2300  * @inode: inode from the ioctl
2301  * @filp: file * from the ioctl
2302  * @cmd: cmd from ioctl
2303  * @arg: arg from ioctl
2304  *
2305  * LOCKING:
2306  * Takes mode config lock.
2307  *
2308  * Add a new FB to the specified CRTC, given a user request with format.
2309  *
2310  * Called by the user via ioctl.
2311  *
2312  * RETURNS:
2313  * Zero on success, errno on failure.
2314  */
2315 int drm_mode_addfb2(struct drm_device *dev,
2316                     void *data, struct drm_file *file_priv)
2317 {
2318         struct drm_mode_fb_cmd2 *r = data;
2319         struct drm_mode_config *config = &dev->mode_config;
2320         struct drm_framebuffer *fb;
2321         int ret;
2322
2323         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2324                 return -EINVAL;
2325
2326         if ((config->min_width > r->width) || (r->width > config->max_width)) {
2327                 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n",
2328                           r->width, config->min_width, config->max_width);
2329                 return -EINVAL;
2330         }
2331         if ((config->min_height > r->height) || (r->height > config->max_height)) {
2332                 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n",
2333                           r->height, config->min_height, config->max_height);
2334                 return -EINVAL;
2335         }
2336
2337         ret = framebuffer_check(r);
2338         if (ret)
2339                 return ret;
2340
2341         mutex_lock(&dev->mode_config.mutex);
2342
2343         fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
2344         if (IS_ERR(fb)) {
2345                 DRM_DEBUG_KMS("could not create framebuffer\n");
2346                 ret = PTR_ERR(fb);
2347                 goto out;
2348         }
2349
2350         r->fb_id = fb->base.id;
2351         list_add(&fb->filp_head, &file_priv->fbs);
2352         DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
2353
2354 out:
2355         mutex_unlock(&dev->mode_config.mutex);
2356         return ret;
2357 }
2358
2359 /**
2360  * drm_mode_rmfb - remove an FB from the configuration
2361  * @inode: inode from the ioctl
2362  * @filp: file * from the ioctl
2363  * @cmd: cmd from ioctl
2364  * @arg: arg from ioctl
2365  *
2366  * LOCKING:
2367  * Takes mode config lock.
2368  *
2369  * Remove the FB specified by the user.
2370  *
2371  * Called by the user via ioctl.
2372  *
2373  * RETURNS:
2374  * Zero on success, errno on failure.
2375  */
2376 int drm_mode_rmfb(struct drm_device *dev,
2377                    void *data, struct drm_file *file_priv)
2378 {
2379         struct drm_mode_object *obj;
2380         struct drm_framebuffer *fb = NULL;
2381         struct drm_framebuffer *fbl = NULL;
2382         uint32_t *id = data;
2383         int ret = 0;
2384         int found = 0;
2385
2386         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2387                 return -EINVAL;
2388
2389         mutex_lock(&dev->mode_config.mutex);
2390         obj = drm_mode_object_find(dev, *id, DRM_MODE_OBJECT_FB);
2391         /* TODO check that we really get a framebuffer back. */
2392         if (!obj) {
2393                 ret = -EINVAL;
2394                 goto out;
2395         }
2396         fb = obj_to_fb(obj);
2397
2398         list_for_each_entry(fbl, &file_priv->fbs, filp_head)
2399                 if (fb == fbl)
2400                         found = 1;
2401
2402         if (!found) {
2403                 ret = -EINVAL;
2404                 goto out;
2405         }
2406
2407         drm_framebuffer_remove(fb);
2408
2409 out:
2410         mutex_unlock(&dev->mode_config.mutex);
2411         return ret;
2412 }
2413
2414 /**
2415  * drm_mode_getfb - get FB info
2416  * @inode: inode from the ioctl
2417  * @filp: file * from the ioctl
2418  * @cmd: cmd from ioctl
2419  * @arg: arg from ioctl
2420  *
2421  * LOCKING:
2422  * Takes mode config lock.
2423  *
2424  * Lookup the FB given its ID and return info about it.
2425  *
2426  * Called by the user via ioctl.
2427  *
2428  * RETURNS:
2429  * Zero on success, errno on failure.
2430  */
2431 int drm_mode_getfb(struct drm_device *dev,
2432                    void *data, struct drm_file *file_priv)
2433 {
2434         struct drm_mode_fb_cmd *r = data;
2435         struct drm_mode_object *obj;
2436         struct drm_framebuffer *fb;
2437         int ret = 0;
2438
2439         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2440                 return -EINVAL;
2441
2442         mutex_lock(&dev->mode_config.mutex);
2443         obj = drm_mode_object_find(dev, r->fb_id, DRM_MODE_OBJECT_FB);
2444         if (!obj) {
2445                 ret = -EINVAL;
2446                 goto out;
2447         }
2448         fb = obj_to_fb(obj);
2449
2450         r->height = fb->height;
2451         r->width = fb->width;
2452         r->depth = fb->depth;
2453         r->bpp = fb->bits_per_pixel;
2454         r->pitch = fb->pitches[0];
2455         fb->funcs->create_handle(fb, file_priv, &r->handle);
2456
2457 out:
2458         mutex_unlock(&dev->mode_config.mutex);
2459         return ret;
2460 }
2461
2462 int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
2463                            void *data, struct drm_file *file_priv)
2464 {
2465         struct drm_clip_rect __user *clips_ptr;
2466         struct drm_clip_rect *clips = NULL;
2467         struct drm_mode_fb_dirty_cmd *r = data;
2468         struct drm_mode_object *obj;
2469         struct drm_framebuffer *fb;
2470         unsigned flags;
2471         int num_clips;
2472         int ret;
2473
2474         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2475                 return -EINVAL;
2476
2477         mutex_lock(&dev->mode_config.mutex);
2478         obj = drm_mode_object_find(dev, r->fb_id, DRM_MODE_OBJECT_FB);
2479         if (!obj) {
2480                 ret = -EINVAL;
2481                 goto out_err1;
2482         }
2483         fb = obj_to_fb(obj);
2484
2485         num_clips = r->num_clips;
2486         clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr;
2487
2488         if (!num_clips != !clips_ptr) {
2489                 ret = -EINVAL;
2490                 goto out_err1;
2491         }
2492
2493         flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags;
2494
2495         /* If userspace annotates copy, clips must come in pairs */
2496         if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) {
2497                 ret = -EINVAL;
2498                 goto out_err1;
2499         }
2500
2501         if (num_clips && clips_ptr) {
2502                 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) {
2503                         ret = -EINVAL;
2504                         goto out_err1;
2505                 }
2506                 clips = kzalloc(num_clips * sizeof(*clips), GFP_KERNEL);
2507                 if (!clips) {
2508                         ret = -ENOMEM;
2509                         goto out_err1;
2510                 }
2511
2512                 ret = copy_from_user(clips, clips_ptr,
2513                                      num_clips * sizeof(*clips));
2514                 if (ret) {
2515                         ret = -EFAULT;
2516                         goto out_err2;
2517                 }
2518         }
2519
2520         if (fb->funcs->dirty) {
2521                 ret = fb->funcs->dirty(fb, file_priv, flags, r->color,
2522                                        clips, num_clips);
2523         } else {
2524                 ret = -ENOSYS;
2525                 goto out_err2;
2526         }
2527
2528 out_err2:
2529         kfree(clips);
2530 out_err1:
2531         mutex_unlock(&dev->mode_config.mutex);
2532         return ret;
2533 }
2534
2535
2536 /**
2537  * drm_fb_release - remove and free the FBs on this file
2538  * @filp: file * from the ioctl
2539  *
2540  * LOCKING:
2541  * Takes mode config lock.
2542  *
2543  * Destroy all the FBs associated with @filp.
2544  *
2545  * Called by the user via ioctl.
2546  *
2547  * RETURNS:
2548  * Zero on success, errno on failure.
2549  */
2550 void drm_fb_release(struct drm_file *priv)
2551 {
2552         struct drm_device *dev = priv->minor->dev;
2553         struct drm_framebuffer *fb, *tfb;
2554
2555         mutex_lock(&dev->mode_config.mutex);
2556         list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
2557                 drm_framebuffer_remove(fb);
2558         }
2559         mutex_unlock(&dev->mode_config.mutex);
2560 }
2561
2562 /**
2563  * drm_mode_attachmode - add a mode to the user mode list
2564  * @dev: DRM device
2565  * @connector: connector to add the mode to
2566  * @mode: mode to add
2567  *
2568  * Add @mode to @connector's user mode list.
2569  */
2570 static void drm_mode_attachmode(struct drm_device *dev,
2571                                 struct drm_connector *connector,
2572                                 struct drm_display_mode *mode)
2573 {
2574         list_add_tail(&mode->head, &connector->user_modes);
2575 }
2576
2577 int drm_mode_attachmode_crtc(struct drm_device *dev, struct drm_crtc *crtc,
2578                              const struct drm_display_mode *mode)
2579 {
2580         struct drm_connector *connector;
2581         int ret = 0;
2582         struct drm_display_mode *dup_mode, *next;
2583         LIST_HEAD(list);
2584
2585         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
2586                 if (!connector->encoder)
2587                         continue;
2588                 if (connector->encoder->crtc == crtc) {
2589                         dup_mode = drm_mode_duplicate(dev, mode);
2590                         if (!dup_mode) {
2591                                 ret = -ENOMEM;
2592                                 goto out;
2593                         }
2594                         list_add_tail(&dup_mode->head, &list);
2595                 }
2596         }
2597
2598         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
2599                 if (!connector->encoder)
2600                         continue;
2601                 if (connector->encoder->crtc == crtc)
2602                         list_move_tail(list.next, &connector->user_modes);
2603         }
2604
2605         WARN_ON(!list_empty(&list));
2606
2607  out:
2608         list_for_each_entry_safe(dup_mode, next, &list, head)
2609                 drm_mode_destroy(dev, dup_mode);
2610
2611         return ret;
2612 }
2613 EXPORT_SYMBOL(drm_mode_attachmode_crtc);
2614
2615 static int drm_mode_detachmode(struct drm_device *dev,
2616                                struct drm_connector *connector,
2617                                struct drm_display_mode *mode)
2618 {
2619         int found = 0;
2620         int ret = 0;
2621         struct drm_display_mode *match_mode, *t;
2622
2623         list_for_each_entry_safe(match_mode, t, &connector->user_modes, head) {
2624                 if (drm_mode_equal(match_mode, mode)) {
2625                         list_del(&match_mode->head);
2626                         drm_mode_destroy(dev, match_mode);
2627                         found = 1;
2628                         break;
2629                 }
2630         }
2631
2632         if (!found)
2633                 ret = -EINVAL;
2634
2635         return ret;
2636 }
2637
2638 int drm_mode_detachmode_crtc(struct drm_device *dev, struct drm_display_mode *mode)
2639 {
2640         struct drm_connector *connector;
2641
2642         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
2643                 drm_mode_detachmode(dev, connector, mode);
2644         }
2645         return 0;
2646 }
2647 EXPORT_SYMBOL(drm_mode_detachmode_crtc);
2648
2649 /**
2650  * drm_fb_attachmode - Attach a user mode to an connector
2651  * @inode: inode from the ioctl
2652  * @filp: file * from the ioctl
2653  * @cmd: cmd from ioctl
2654  * @arg: arg from ioctl
2655  *
2656  * This attaches a user specified mode to an connector.
2657  * Called by the user via ioctl.
2658  *
2659  * RETURNS:
2660  * Zero on success, errno on failure.
2661  */
2662 int drm_mode_attachmode_ioctl(struct drm_device *dev,
2663                               void *data, struct drm_file *file_priv)
2664 {
2665         struct drm_mode_mode_cmd *mode_cmd = data;
2666         struct drm_connector *connector;
2667         struct drm_display_mode *mode;
2668         struct drm_mode_object *obj;
2669         struct drm_mode_modeinfo *umode = &mode_cmd->mode;
2670         int ret;
2671
2672         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2673                 return -EINVAL;
2674
2675         mutex_lock(&dev->mode_config.mutex);
2676
2677         obj = drm_mode_object_find(dev, mode_cmd->connector_id, DRM_MODE_OBJECT_CONNECTOR);
2678         if (!obj) {
2679                 ret = -EINVAL;
2680                 goto out;
2681         }
2682         connector = obj_to_connector(obj);
2683
2684         mode = drm_mode_create(dev);
2685         if (!mode) {
2686                 ret = -ENOMEM;
2687                 goto out;
2688         }
2689
2690         ret = drm_crtc_convert_umode(mode, umode);
2691         if (ret) {
2692                 DRM_DEBUG_KMS("Invalid mode\n");
2693                 drm_mode_destroy(dev, mode);
2694                 goto out;
2695         }
2696
2697         drm_mode_attachmode(dev, connector, mode);
2698 out:
2699         mutex_unlock(&dev->mode_config.mutex);
2700         return ret;
2701 }
2702
2703
2704 /**
2705  * drm_fb_detachmode - Detach a user specified mode from an connector
2706  * @inode: inode from the ioctl
2707  * @filp: file * from the ioctl
2708  * @cmd: cmd from ioctl
2709  * @arg: arg from ioctl
2710  *
2711  * Called by the user via ioctl.
2712  *
2713  * RETURNS:
2714  * Zero on success, errno on failure.
2715  */
2716 int drm_mode_detachmode_ioctl(struct drm_device *dev,
2717                               void *data, struct drm_file *file_priv)
2718 {
2719         struct drm_mode_object *obj;
2720         struct drm_mode_mode_cmd *mode_cmd = data;
2721         struct drm_connector *connector;
2722         struct drm_display_mode mode;
2723         struct drm_mode_modeinfo *umode = &mode_cmd->mode;
2724         int ret;
2725
2726         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2727                 return -EINVAL;
2728
2729         mutex_lock(&dev->mode_config.mutex);
2730
2731         obj = drm_mode_object_find(dev, mode_cmd->connector_id, DRM_MODE_OBJECT_CONNECTOR);
2732         if (!obj) {
2733                 ret = -EINVAL;
2734                 goto out;
2735         }
2736         connector = obj_to_connector(obj);
2737
2738         ret = drm_crtc_convert_umode(&mode, umode);
2739         if (ret) {
2740                 DRM_DEBUG_KMS("Invalid mode\n");
2741                 goto out;
2742         }
2743
2744         ret = drm_mode_detachmode(dev, connector, &mode);
2745 out:
2746         mutex_unlock(&dev->mode_config.mutex);
2747         return ret;
2748 }
2749
2750 struct drm_property *drm_property_create(struct drm_device *dev, int flags,
2751                                          const char *name, int num_values)
2752 {
2753         struct drm_property *property = NULL;
2754         int ret;
2755
2756         property = kzalloc(sizeof(struct drm_property), GFP_KERNEL);
2757         if (!property)
2758                 return NULL;
2759
2760         if (num_values) {
2761                 property->values = kzalloc(sizeof(uint64_t)*num_values, GFP_KERNEL);
2762                 if (!property->values)
2763                         goto fail;
2764         }
2765
2766         ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY);
2767         if (ret)
2768                 goto fail;
2769
2770         property->flags = flags;
2771         property->num_values = num_values;
2772         INIT_LIST_HEAD(&property->enum_blob_list);
2773
2774         if (name) {
2775                 strncpy(property->name, name, DRM_PROP_NAME_LEN);
2776                 property->name[DRM_PROP_NAME_LEN-1] = '\0';
2777         }
2778
2779         list_add_tail(&property->head, &dev->mode_config.property_list);
2780         return property;
2781 fail:
2782         kfree(property->values);
2783         kfree(property);
2784         return NULL;
2785 }
2786 EXPORT_SYMBOL(drm_property_create);
2787
2788 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
2789                                          const char *name,
2790                                          const struct drm_prop_enum_list *props,
2791                                          int num_values)
2792 {
2793         struct drm_property *property;
2794         int i, ret;
2795
2796         flags |= DRM_MODE_PROP_ENUM;
2797
2798         property = drm_property_create(dev, flags, name, num_values);
2799         if (!property)
2800                 return NULL;
2801
2802         for (i = 0; i < num_values; i++) {
2803                 ret = drm_property_add_enum(property, i,
2804                                       props[i].type,
2805                                       props[i].name);
2806                 if (ret) {
2807                         drm_property_destroy(dev, property);
2808                         return NULL;
2809                 }
2810         }
2811
2812         return property;
2813 }
2814 EXPORT_SYMBOL(drm_property_create_enum);
2815
2816 struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
2817                                          int flags, const char *name,
2818                                          const struct drm_prop_enum_list *props,
2819                                          int num_values)
2820 {
2821         struct drm_property *property;
2822         int i, ret;
2823
2824         flags |= DRM_MODE_PROP_BITMASK;
2825
2826         property = drm_property_create(dev, flags, name, num_values);
2827         if (!property)
2828                 return NULL;
2829
2830         for (i = 0; i < num_values; i++) {
2831                 ret = drm_property_add_enum(property, i,
2832                                       props[i].type,
2833                                       props[i].name);
2834                 if (ret) {
2835                         drm_property_destroy(dev, property);
2836                         return NULL;
2837                 }
2838         }
2839
2840         return property;
2841 }
2842 EXPORT_SYMBOL(drm_property_create_bitmask);
2843
2844 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
2845                                          const char *name,
2846                                          uint64_t min, uint64_t max)
2847 {
2848         struct drm_property *property;
2849
2850         flags |= DRM_MODE_PROP_RANGE;
2851
2852         property = drm_property_create(dev, flags, name, 2);
2853         if (!property)
2854                 return NULL;
2855
2856         property->values[0] = min;
2857         property->values[1] = max;
2858
2859         return property;
2860 }
2861 EXPORT_SYMBOL(drm_property_create_range);
2862
2863 int drm_property_add_enum(struct drm_property *property, int index,
2864                           uint64_t value, const char *name)
2865 {
2866         struct drm_property_enum *prop_enum;
2867
2868         if (!(property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)))
2869                 return -EINVAL;
2870
2871         /*
2872          * Bitmask enum properties have the additional constraint of values
2873          * from 0 to 63
2874          */
2875         if ((property->flags & DRM_MODE_PROP_BITMASK) && (value > 63))
2876                 return -EINVAL;
2877
2878         if (!list_empty(&property->enum_blob_list)) {
2879                 list_for_each_entry(prop_enum, &property->enum_blob_list, head) {
2880                         if (prop_enum->value == value) {
2881                                 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
2882                                 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
2883                                 return 0;
2884                         }
2885                 }
2886         }
2887
2888         prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL);
2889         if (!prop_enum)
2890                 return -ENOMEM;
2891
2892         strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
2893         prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
2894         prop_enum->value = value;
2895
2896         property->values[index] = value;
2897         list_add_tail(&prop_enum->head, &property->enum_blob_list);
2898         return 0;
2899 }
2900 EXPORT_SYMBOL(drm_property_add_enum);
2901
2902 void drm_property_destroy(struct drm_device *dev, struct drm_property *property)
2903 {
2904         struct drm_property_enum *prop_enum, *pt;
2905
2906         list_for_each_entry_safe(prop_enum, pt, &property->enum_blob_list, head) {
2907                 list_del(&prop_enum->head);
2908                 kfree(prop_enum);
2909         }
2910
2911         if (property->num_values)
2912                 kfree(property->values);
2913         drm_mode_object_put(dev, &property->base);
2914         list_del(&property->head);
2915         kfree(property);
2916 }
2917 EXPORT_SYMBOL(drm_property_destroy);
2918
2919 void drm_connector_attach_property(struct drm_connector *connector,
2920                                struct drm_property *property, uint64_t init_val)
2921 {
2922         drm_object_attach_property(&connector->base, property, init_val);
2923 }
2924 EXPORT_SYMBOL(drm_connector_attach_property);
2925
2926 int drm_connector_property_set_value(struct drm_connector *connector,
2927                                   struct drm_property *property, uint64_t value)
2928 {
2929         return drm_object_property_set_value(&connector->base, property, value);
2930 }
2931 EXPORT_SYMBOL(drm_connector_property_set_value);
2932
2933 int drm_connector_property_get_value(struct drm_connector *connector,
2934                                   struct drm_property *property, uint64_t *val)
2935 {
2936         return drm_object_property_get_value(&connector->base, property, val);
2937 }
2938 EXPORT_SYMBOL(drm_connector_property_get_value);
2939
2940 void drm_object_attach_property(struct drm_mode_object *obj,
2941                                 struct drm_property *property,
2942                                 uint64_t init_val)
2943 {
2944         int count = obj->properties->count;
2945
2946         if (count == DRM_OBJECT_MAX_PROPERTY) {
2947                 WARN(1, "Failed to attach object property (type: 0x%x). Please "
2948                         "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
2949                         "you see this message on the same object type.\n",
2950                         obj->type);
2951                 return;
2952         }
2953
2954         obj->properties->ids[count] = property->base.id;
2955         obj->properties->values[count] = init_val;
2956         obj->properties->count++;
2957 }
2958 EXPORT_SYMBOL(drm_object_attach_property);
2959
2960 int drm_object_property_set_value(struct drm_mode_object *obj,
2961                                   struct drm_property *property, uint64_t val)
2962 {
2963         int i;
2964
2965         for (i = 0; i < obj->properties->count; i++) {
2966                 if (obj->properties->ids[i] == property->base.id) {
2967                         obj->properties->values[i] = val;
2968                         return 0;
2969                 }
2970         }
2971
2972         return -EINVAL;
2973 }
2974 EXPORT_SYMBOL(drm_object_property_set_value);
2975
2976 int drm_object_property_get_value(struct drm_mode_object *obj,
2977                                   struct drm_property *property, uint64_t *val)
2978 {
2979         int i;
2980
2981         for (i = 0; i < obj->properties->count; i++) {
2982                 if (obj->properties->ids[i] == property->base.id) {
2983                         *val = obj->properties->values[i];
2984                         return 0;
2985                 }
2986         }
2987
2988         return -EINVAL;
2989 }
2990 EXPORT_SYMBOL(drm_object_property_get_value);
2991
2992 int drm_mode_getproperty_ioctl(struct drm_device *dev,
2993                                void *data, struct drm_file *file_priv)
2994 {
2995         struct drm_mode_object *obj;
2996         struct drm_mode_get_property *out_resp = data;
2997         struct drm_property *property;
2998         int enum_count = 0;
2999         int blob_count = 0;
3000         int value_count = 0;
3001         int ret = 0, i;
3002         int copied;
3003         struct drm_property_enum *prop_enum;
3004         struct drm_mode_property_enum __user *enum_ptr;
3005         struct drm_property_blob *prop_blob;
3006         uint32_t __user *blob_id_ptr;
3007         uint64_t __user *values_ptr;
3008         uint32_t __user *blob_length_ptr;
3009
3010         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3011                 return -EINVAL;
3012
3013         mutex_lock(&dev->mode_config.mutex);
3014         obj = drm_mode_object_find(dev, out_resp->prop_id, DRM_MODE_OBJECT_PROPERTY);
3015         if (!obj) {
3016                 ret = -EINVAL;
3017                 goto done;
3018         }
3019         property = obj_to_property(obj);
3020
3021         if (property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)) {
3022                 list_for_each_entry(prop_enum, &property->enum_blob_list, head)
3023                         enum_count++;
3024         } else if (property->flags & DRM_MODE_PROP_BLOB) {
3025                 list_for_each_entry(prop_blob, &property->enum_blob_list, head)
3026                         blob_count++;
3027         }
3028
3029         value_count = property->num_values;
3030
3031         strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN);
3032         out_resp->name[DRM_PROP_NAME_LEN-1] = 0;
3033         out_resp->flags = property->flags;
3034
3035         if ((out_resp->count_values >= value_count) && value_count) {
3036                 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr;
3037                 for (i = 0; i < value_count; i++) {
3038                         if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) {
3039                                 ret = -EFAULT;
3040                                 goto done;
3041                         }
3042                 }
3043         }
3044         out_resp->count_values = value_count;
3045
3046         if (property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)) {
3047                 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) {
3048                         copied = 0;
3049                         enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr;
3050                         list_for_each_entry(prop_enum, &property->enum_blob_list, head) {
3051
3052                                 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) {
3053                                         ret = -EFAULT;
3054                                         goto done;
3055                                 }
3056
3057                                 if (copy_to_user(&enum_ptr[copied].name,
3058                                                  &prop_enum->name, DRM_PROP_NAME_LEN)) {
3059                                         ret = -EFAULT;
3060                                         goto done;
3061                                 }
3062                                 copied++;
3063                         }
3064                 }
3065                 out_resp->count_enum_blobs = enum_count;
3066         }
3067
3068         if (property->flags & DRM_MODE_PROP_BLOB) {
3069                 if ((out_resp->count_enum_blobs >= blob_count) && blob_count) {
3070                         copied = 0;
3071                         blob_id_ptr = (uint32_t __user *)(unsigned long)out_resp->enum_blob_ptr;
3072                         blob_length_ptr = (uint32_t __user *)(unsigned long)out_resp->values_ptr;
3073
3074                         list_for_each_entry(prop_blob, &property->enum_blob_list, head) {
3075                                 if (put_user(prop_blob->base.id, blob_id_ptr + copied)) {
3076                                         ret = -EFAULT;
3077                                         goto done;
3078                                 }
3079
3080                                 if (put_user(prop_blob->length, blob_length_ptr + copied)) {
3081                                         ret = -EFAULT;
3082                                         goto done;
3083                                 }
3084
3085                                 copied++;
3086                         }
3087                 }
3088                 out_resp->count_enum_blobs = blob_count;
3089         }
3090 done:
3091         mutex_unlock(&dev->mode_config.mutex);
3092         return ret;
3093 }
3094
3095 static struct drm_property_blob *drm_property_create_blob(struct drm_device *dev, int length,
3096                                                           void *data)
3097 {
3098         struct drm_property_blob *blob;
3099         int ret;
3100
3101         if (!length || !data)
3102                 return NULL;
3103
3104         blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
3105         if (!blob)
3106                 return NULL;
3107
3108         ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB);
3109         if (ret) {
3110                 kfree(blob);
3111                 return NULL;
3112         }
3113
3114         blob->length = length;
3115
3116         memcpy(blob->data, data, length);
3117
3118         list_add_tail(&blob->head, &dev->mode_config.property_blob_list);
3119         return blob;
3120 }
3121
3122 static void drm_property_destroy_blob(struct drm_device *dev,
3123                                struct drm_property_blob *blob)
3124 {
3125         drm_mode_object_put(dev, &blob->base);
3126         list_del(&blob->head);
3127         kfree(blob);
3128 }
3129
3130 int drm_mode_getblob_ioctl(struct drm_device *dev,
3131                            void *data, struct drm_file *file_priv)
3132 {
3133         struct drm_mode_object *obj;
3134         struct drm_mode_get_blob *out_resp = data;
3135         struct drm_property_blob *blob;
3136         int ret = 0;
3137         void __user *blob_ptr;
3138
3139         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3140                 return -EINVAL;
3141
3142         mutex_lock(&dev->mode_config.mutex);
3143         obj = drm_mode_object_find(dev, out_resp->blob_id, DRM_MODE_OBJECT_BLOB);
3144         if (!obj) {
3145                 ret = -EINVAL;
3146                 goto done;
3147         }
3148         blob = obj_to_blob(obj);
3149
3150         if (out_resp->length == blob->length) {
3151                 blob_ptr = (void __user *)(unsigned long)out_resp->data;
3152                 if (copy_to_user(blob_ptr, blob->data, blob->length)){
3153                         ret = -EFAULT;
3154                         goto done;
3155                 }
3156         }
3157         out_resp->length = blob->length;
3158
3159 done:
3160         mutex_unlock(&dev->mode_config.mutex);
3161         return ret;
3162 }
3163
3164 int drm_mode_connector_update_edid_property(struct drm_connector *connector,
3165                                             struct edid *edid)
3166 {
3167         struct drm_device *dev = connector->dev;
3168         int ret, size;
3169
3170         if (connector->edid_blob_ptr)
3171                 drm_property_destroy_blob(dev, connector->edid_blob_ptr);
3172
3173         /* Delete edid, when there is none. */
3174         if (!edid) {
3175                 connector->edid_blob_ptr = NULL;
3176                 ret = drm_connector_property_set_value(connector, dev->mode_config.edid_property, 0);
3177                 return ret;
3178         }
3179
3180         size = EDID_LENGTH * (1 + edid->extensions);
3181         connector->edid_blob_ptr = drm_property_create_blob(connector->dev,
3182                                                             size, edid);
3183
3184         ret = drm_connector_property_set_value(connector,
3185                                                dev->mode_config.edid_property,
3186                                                connector->edid_blob_ptr->base.id);
3187
3188         return ret;
3189 }
3190 EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
3191
3192 static bool drm_property_change_is_valid(struct drm_property *property,
3193                                          uint64_t value)
3194 {
3195         if (property->flags & DRM_MODE_PROP_IMMUTABLE)
3196                 return false;
3197         if (property->flags & DRM_MODE_PROP_RANGE) {
3198                 if (value < property->values[0] || value > property->values[1])
3199                         return false;
3200                 return true;
3201         } else if (property->flags & DRM_MODE_PROP_BITMASK) {
3202                 int i;
3203                 uint64_t valid_mask = 0;
3204                 for (i = 0; i < property->num_values; i++)
3205                         valid_mask |= (1ULL << property->values[i]);
3206                 return !(value & ~valid_mask);
3207         } else {
3208                 int i;
3209                 for (i = 0; i < property->num_values; i++)
3210                         if (property->values[i] == value)
3211                                 return true;
3212                 return false;
3213         }
3214 }
3215
3216 int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
3217                                        void *data, struct drm_file *file_priv)
3218 {
3219         struct drm_mode_connector_set_property *conn_set_prop = data;
3220         struct drm_mode_obj_set_property obj_set_prop = {
3221                 .value = conn_set_prop->value,
3222                 .prop_id = conn_set_prop->prop_id,
3223                 .obj_id = conn_set_prop->connector_id,
3224                 .obj_type = DRM_MODE_OBJECT_CONNECTOR
3225         };
3226
3227         /* It does all the locking and checking we need */
3228         return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
3229 }
3230
3231 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
3232                                            struct drm_property *property,
3233                                            uint64_t value)
3234 {
3235         int ret = -EINVAL;
3236         struct drm_connector *connector = obj_to_connector(obj);
3237
3238         /* Do DPMS ourselves */
3239         if (property == connector->dev->mode_config.dpms_property) {
3240                 if (connector->funcs->dpms)
3241                         (*connector->funcs->dpms)(connector, (int)value);
3242                 ret = 0;
3243         } else if (connector->funcs->set_property)
3244                 ret = connector->funcs->set_property(connector, property, value);
3245
3246         /* store the property value if successful */
3247         if (!ret)
3248                 drm_connector_property_set_value(connector, property, value);
3249         return ret;
3250 }
3251
3252 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
3253                                       struct drm_property *property,
3254                                       uint64_t value)
3255 {
3256         int ret = -EINVAL;
3257         struct drm_crtc *crtc = obj_to_crtc(obj);
3258
3259         if (crtc->funcs->set_property)
3260                 ret = crtc->funcs->set_property(crtc, property, value);
3261         if (!ret)
3262                 drm_object_property_set_value(obj, property, value);
3263
3264         return ret;
3265 }
3266
3267 static int drm_mode_plane_set_obj_prop(struct drm_mode_object *obj,
3268                                       struct drm_property *property,
3269                                       uint64_t value)
3270 {
3271         int ret = -EINVAL;
3272         struct drm_plane *plane = obj_to_plane(obj);
3273
3274         if (plane->funcs->set_property)
3275                 ret = plane->funcs->set_property(plane, property, value);
3276         if (!ret)
3277                 drm_object_property_set_value(obj, property, value);
3278
3279         return ret;
3280 }
3281
3282 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
3283                                       struct drm_file *file_priv)
3284 {
3285         struct drm_mode_obj_get_properties *arg = data;
3286         struct drm_mode_object *obj;
3287         int ret = 0;
3288         int i;
3289         int copied = 0;
3290         int props_count = 0;
3291         uint32_t __user *props_ptr;
3292         uint64_t __user *prop_values_ptr;
3293
3294         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3295                 return -EINVAL;
3296
3297         mutex_lock(&dev->mode_config.mutex);
3298
3299         obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
3300         if (!obj) {
3301                 ret = -EINVAL;
3302                 goto out;
3303         }
3304         if (!obj->properties) {
3305                 ret = -EINVAL;
3306                 goto out;
3307         }
3308
3309         props_count = obj->properties->count;
3310
3311         /* This ioctl is called twice, once to determine how much space is
3312          * needed, and the 2nd time to fill it. */
3313         if ((arg->count_props >= props_count) && props_count) {
3314                 copied = 0;
3315                 props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
3316                 prop_values_ptr = (uint64_t __user *)(unsigned long)
3317                                   (arg->prop_values_ptr);
3318                 for (i = 0; i < props_count; i++) {
3319                         if (put_user(obj->properties->ids[i],
3320                                      props_ptr + copied)) {
3321                                 ret = -EFAULT;
3322                                 goto out;
3323                         }
3324                         if (put_user(obj->properties->values[i],
3325                                      prop_values_ptr + copied)) {
3326                                 ret = -EFAULT;
3327                                 goto out;
3328                         }
3329                         copied++;
3330                 }
3331         }
3332         arg->count_props = props_count;
3333 out:
3334         mutex_unlock(&dev->mode_config.mutex);
3335         return ret;
3336 }
3337
3338 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
3339                                     struct drm_file *file_priv)
3340 {
3341         struct drm_mode_obj_set_property *arg = data;
3342         struct drm_mode_object *arg_obj;
3343         struct drm_mode_object *prop_obj;
3344         struct drm_property *property;
3345         int ret = -EINVAL;
3346         int i;
3347
3348         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3349                 return -EINVAL;
3350
3351         mutex_lock(&dev->mode_config.mutex);
3352
3353         arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
3354         if (!arg_obj)
3355                 goto out;
3356         if (!arg_obj->properties)
3357                 goto out;
3358
3359         for (i = 0; i < arg_obj->properties->count; i++)
3360                 if (arg_obj->properties->ids[i] == arg->prop_id)
3361                         break;
3362
3363         if (i == arg_obj->properties->count)
3364                 goto out;
3365
3366         prop_obj = drm_mode_object_find(dev, arg->prop_id,
3367                                         DRM_MODE_OBJECT_PROPERTY);
3368         if (!prop_obj)
3369                 goto out;
3370         property = obj_to_property(prop_obj);
3371
3372         if (!drm_property_change_is_valid(property, arg->value))
3373                 goto out;
3374
3375         switch (arg_obj->type) {
3376         case DRM_MODE_OBJECT_CONNECTOR:
3377                 ret = drm_mode_connector_set_obj_prop(arg_obj, property,
3378                                                       arg->value);
3379                 break;
3380         case DRM_MODE_OBJECT_CRTC:
3381                 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
3382                 break;
3383         case DRM_MODE_OBJECT_PLANE:
3384                 ret = drm_mode_plane_set_obj_prop(arg_obj, property, arg->value);
3385                 break;
3386         }
3387
3388 out:
3389         mutex_unlock(&dev->mode_config.mutex);
3390         return ret;
3391 }
3392
3393 int drm_mode_connector_attach_encoder(struct drm_connector *connector,
3394                                       struct drm_encoder *encoder)
3395 {
3396         int i;
3397
3398         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
3399                 if (connector->encoder_ids[i] == 0) {
3400                         connector->encoder_ids[i] = encoder->base.id;
3401                         return 0;
3402                 }
3403         }
3404         return -ENOMEM;
3405 }
3406 EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
3407
3408 void drm_mode_connector_detach_encoder(struct drm_connector *connector,
3409                                     struct drm_encoder *encoder)
3410 {
3411         int i;
3412         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
3413                 if (connector->encoder_ids[i] == encoder->base.id) {
3414                         connector->encoder_ids[i] = 0;
3415                         if (connector->encoder == encoder)
3416                                 connector->encoder = NULL;
3417                         break;
3418                 }
3419         }
3420 }
3421 EXPORT_SYMBOL(drm_mode_connector_detach_encoder);
3422
3423 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
3424                                   int gamma_size)
3425 {
3426         crtc->gamma_size = gamma_size;
3427
3428         crtc->gamma_store = kzalloc(gamma_size * sizeof(uint16_t) * 3, GFP_KERNEL);
3429         if (!crtc->gamma_store) {
3430                 crtc->gamma_size = 0;
3431                 return -ENOMEM;
3432         }
3433
3434         return 0;
3435 }
3436 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size);
3437
3438 int drm_mode_gamma_set_ioctl(struct drm_device *dev,
3439                              void *data, struct drm_file *file_priv)
3440 {
3441         struct drm_mode_crtc_lut *crtc_lut = data;
3442         struct drm_mode_object *obj;
3443         struct drm_crtc *crtc;
3444         void *r_base, *g_base, *b_base;
3445         int size;
3446         int ret = 0;
3447
3448         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3449                 return -EINVAL;
3450
3451         mutex_lock(&dev->mode_config.mutex);
3452         obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
3453         if (!obj) {
3454                 ret = -EINVAL;
3455                 goto out;
3456         }
3457         crtc = obj_to_crtc(obj);
3458
3459         if (crtc->funcs->gamma_set == NULL) {
3460                 ret = -ENOSYS;
3461                 goto out;
3462         }
3463
3464         /* memcpy into gamma store */
3465         if (crtc_lut->gamma_size != crtc->gamma_size) {
3466                 ret = -EINVAL;
3467                 goto out;
3468         }
3469
3470         size = crtc_lut->gamma_size * (sizeof(uint16_t));
3471         r_base = crtc->gamma_store;
3472         if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) {
3473                 ret = -EFAULT;
3474                 goto out;
3475         }
3476
3477         g_base = r_base + size;
3478         if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) {
3479                 ret = -EFAULT;
3480                 goto out;
3481         }
3482
3483         b_base = g_base + size;
3484         if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) {
3485                 ret = -EFAULT;
3486                 goto out;
3487         }
3488
3489         crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
3490
3491 out:
3492         mutex_unlock(&dev->mode_config.mutex);
3493         return ret;
3494
3495 }
3496
3497 int drm_mode_gamma_get_ioctl(struct drm_device *dev,
3498                              void *data, struct drm_file *file_priv)
3499 {
3500         struct drm_mode_crtc_lut *crtc_lut = data;
3501         struct drm_mode_object *obj;
3502         struct drm_crtc *crtc;
3503         void *r_base, *g_base, *b_base;
3504         int size;
3505         int ret = 0;
3506
3507         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3508                 return -EINVAL;
3509
3510         mutex_lock(&dev->mode_config.mutex);
3511         obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
3512         if (!obj) {
3513                 ret = -EINVAL;
3514                 goto out;
3515         }
3516         crtc = obj_to_crtc(obj);
3517
3518         /* memcpy into gamma store */
3519         if (crtc_lut->gamma_size != crtc->gamma_size) {
3520                 ret = -EINVAL;
3521                 goto out;
3522         }
3523
3524         size = crtc_lut->gamma_size * (sizeof(uint16_t));
3525         r_base = crtc->gamma_store;
3526         if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) {
3527                 ret = -EFAULT;
3528                 goto out;
3529         }
3530
3531         g_base = r_base + size;
3532         if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) {
3533                 ret = -EFAULT;
3534                 goto out;
3535         }
3536
3537         b_base = g_base + size;
3538         if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) {
3539                 ret = -EFAULT;
3540                 goto out;
3541         }
3542 out:
3543         mutex_unlock(&dev->mode_config.mutex);
3544         return ret;
3545 }
3546
3547 int drm_mode_page_flip_ioctl(struct drm_device *dev,
3548                              void *data, struct drm_file *file_priv)
3549 {
3550         struct drm_mode_crtc_page_flip *page_flip = data;
3551         struct drm_mode_object *obj;
3552         struct drm_crtc *crtc;
3553         struct drm_framebuffer *fb;
3554         struct drm_pending_vblank_event *e = NULL;
3555         unsigned long flags;
3556         int hdisplay, vdisplay;
3557         int ret = -EINVAL;
3558
3559         if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS ||
3560             page_flip->reserved != 0)
3561                 return -EINVAL;
3562
3563         mutex_lock(&dev->mode_config.mutex);
3564         obj = drm_mode_object_find(dev, page_flip->crtc_id, DRM_MODE_OBJECT_CRTC);
3565         if (!obj)
3566                 goto out;
3567         crtc = obj_to_crtc(obj);
3568
3569         if (crtc->fb == NULL) {
3570                 /* The framebuffer is currently unbound, presumably
3571                  * due to a hotplug event, that userspace has not
3572                  * yet discovered.
3573                  */
3574                 ret = -EBUSY;
3575                 goto out;
3576         }
3577
3578         if (crtc->funcs->page_flip == NULL)
3579                 goto out;
3580
3581         obj = drm_mode_object_find(dev, page_flip->fb_id, DRM_MODE_OBJECT_FB);
3582         if (!obj)
3583                 goto out;
3584         fb = obj_to_fb(obj);
3585
3586         hdisplay = crtc->mode.hdisplay;
3587         vdisplay = crtc->mode.vdisplay;
3588
3589         if (crtc->invert_dimensions)
3590                 swap(hdisplay, vdisplay);
3591
3592         if (hdisplay > fb->width ||
3593             vdisplay > fb->height ||
3594             crtc->x > fb->width - hdisplay ||
3595             crtc->y > fb->height - vdisplay) {
3596                 DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n",
3597                               fb->width, fb->height, hdisplay, vdisplay, crtc->x, crtc->y,
3598                               crtc->invert_dimensions ? " (inverted)" : "");
3599                 ret = -ENOSPC;
3600                 goto out;
3601         }
3602
3603         if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
3604                 ret = -ENOMEM;
3605                 spin_lock_irqsave(&dev->event_lock, flags);
3606                 if (file_priv->event_space < sizeof e->event) {
3607                         spin_unlock_irqrestore(&dev->event_lock, flags);
3608                         goto out;
3609                 }
3610                 file_priv->event_space -= sizeof e->event;
3611                 spin_unlock_irqrestore(&dev->event_lock, flags);
3612
3613                 e = kzalloc(sizeof *e, GFP_KERNEL);
3614                 if (e == NULL) {
3615                         spin_lock_irqsave(&dev->event_lock, flags);
3616                         file_priv->event_space += sizeof e->event;
3617                         spin_unlock_irqrestore(&dev->event_lock, flags);
3618                         goto out;
3619                 }
3620
3621                 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
3622                 e->event.base.length = sizeof e->event;
3623                 e->event.user_data = page_flip->user_data;
3624                 e->base.event = &e->event.base;
3625                 e->base.file_priv = file_priv;
3626                 e->base.destroy =
3627                         (void (*) (struct drm_pending_event *)) kfree;
3628         }
3629
3630         ret = crtc->funcs->page_flip(crtc, fb, e);
3631         if (ret) {
3632                 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
3633                         spin_lock_irqsave(&dev->event_lock, flags);
3634                         file_priv->event_space += sizeof e->event;
3635                         spin_unlock_irqrestore(&dev->event_lock, flags);
3636                         kfree(e);
3637                 }
3638         }
3639
3640 out:
3641         mutex_unlock(&dev->mode_config.mutex);
3642         return ret;
3643 }
3644
3645 void drm_mode_config_reset(struct drm_device *dev)
3646 {
3647         struct drm_crtc *crtc;
3648         struct drm_encoder *encoder;
3649         struct drm_connector *connector;
3650
3651         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
3652                 if (crtc->funcs->reset)
3653                         crtc->funcs->reset(crtc);
3654
3655         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
3656                 if (encoder->funcs->reset)
3657                         encoder->funcs->reset(encoder);
3658
3659         list_for_each_entry(connector, &dev->mode_config.connector_list, head)
3660                 if (connector->funcs->reset)
3661                         connector->funcs->reset(connector);
3662 }
3663 EXPORT_SYMBOL(drm_mode_config_reset);
3664
3665 int drm_mode_create_dumb_ioctl(struct drm_device *dev,
3666                                void *data, struct drm_file *file_priv)
3667 {
3668         struct drm_mode_create_dumb *args = data;
3669
3670         if (!dev->driver->dumb_create)
3671                 return -ENOSYS;
3672         return dev->driver->dumb_create(file_priv, dev, args);
3673 }
3674
3675 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
3676                              void *data, struct drm_file *file_priv)
3677 {
3678         struct drm_mode_map_dumb *args = data;
3679
3680         /* call driver ioctl to get mmap offset */
3681         if (!dev->driver->dumb_map_offset)
3682                 return -ENOSYS;
3683
3684         return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset);
3685 }
3686
3687 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
3688                                 void *data, struct drm_file *file_priv)
3689 {
3690         struct drm_mode_destroy_dumb *args = data;
3691
3692         if (!dev->driver->dumb_destroy)
3693                 return -ENOSYS;
3694
3695         return dev->driver->dumb_destroy(file_priv, dev, args->handle);
3696 }
3697
3698 /*
3699  * Just need to support RGB formats here for compat with code that doesn't
3700  * use pixel formats directly yet.
3701  */
3702 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
3703                           int *bpp)
3704 {
3705         switch (format) {
3706         case DRM_FORMAT_RGB332:
3707         case DRM_FORMAT_BGR233:
3708                 *depth = 8;
3709                 *bpp = 8;
3710                 break;
3711         case DRM_FORMAT_XRGB1555:
3712         case DRM_FORMAT_XBGR1555:
3713         case DRM_FORMAT_RGBX5551:
3714         case DRM_FORMAT_BGRX5551:
3715         case DRM_FORMAT_ARGB1555:
3716         case DRM_FORMAT_ABGR1555:
3717         case DRM_FORMAT_RGBA5551:
3718         case DRM_FORMAT_BGRA5551:
3719                 *depth = 15;
3720                 *bpp = 16;
3721                 break;
3722         case DRM_FORMAT_RGB565:
3723         case DRM_FORMAT_BGR565:
3724                 *depth = 16;
3725                 *bpp = 16;
3726                 break;
3727         case DRM_FORMAT_RGB888:
3728         case DRM_FORMAT_BGR888:
3729                 *depth = 24;
3730                 *bpp = 24;
3731                 break;
3732         case DRM_FORMAT_XRGB8888:
3733         case DRM_FORMAT_XBGR8888:
3734         case DRM_FORMAT_RGBX8888:
3735         case DRM_FORMAT_BGRX8888:
3736                 *depth = 24;
3737                 *bpp = 32;
3738                 break;
3739         case DRM_FORMAT_XRGB2101010:
3740         case DRM_FORMAT_XBGR2101010:
3741         case DRM_FORMAT_RGBX1010102:
3742         case DRM_FORMAT_BGRX1010102:
3743         case DRM_FORMAT_ARGB2101010:
3744         case DRM_FORMAT_ABGR2101010:
3745         case DRM_FORMAT_RGBA1010102:
3746         case DRM_FORMAT_BGRA1010102:
3747                 *depth = 30;
3748                 *bpp = 32;
3749                 break;
3750         case DRM_FORMAT_ARGB8888:
3751         case DRM_FORMAT_ABGR8888:
3752         case DRM_FORMAT_RGBA8888:
3753         case DRM_FORMAT_BGRA8888:
3754                 *depth = 32;
3755                 *bpp = 32;
3756                 break;
3757         default:
3758                 DRM_DEBUG_KMS("unsupported pixel format\n");
3759                 *depth = 0;
3760                 *bpp = 0;
3761                 break;
3762         }
3763 }
3764 EXPORT_SYMBOL(drm_fb_get_bpp_depth);
3765
3766 /**
3767  * drm_format_num_planes - get the number of planes for format
3768  * @format: pixel format (DRM_FORMAT_*)
3769  *
3770  * RETURNS:
3771  * The number of planes used by the specified pixel format.
3772  */
3773 int drm_format_num_planes(uint32_t format)
3774 {
3775         switch (format) {
3776         case DRM_FORMAT_YUV410:
3777         case DRM_FORMAT_YVU410:
3778         case DRM_FORMAT_YUV411:
3779         case DRM_FORMAT_YVU411:
3780         case DRM_FORMAT_YUV420:
3781         case DRM_FORMAT_YVU420:
3782         case DRM_FORMAT_YUV422:
3783         case DRM_FORMAT_YVU422:
3784         case DRM_FORMAT_YUV444:
3785         case DRM_FORMAT_YVU444:
3786                 return 3;
3787         case DRM_FORMAT_NV12:
3788         case DRM_FORMAT_NV21:
3789         case DRM_FORMAT_NV16:
3790         case DRM_FORMAT_NV61:
3791         case DRM_FORMAT_NV24:
3792         case DRM_FORMAT_NV42:
3793                 return 2;
3794         default:
3795                 return 1;
3796         }
3797 }
3798 EXPORT_SYMBOL(drm_format_num_planes);
3799
3800 /**
3801  * drm_format_plane_cpp - determine the bytes per pixel value
3802  * @format: pixel format (DRM_FORMAT_*)
3803  * @plane: plane index
3804  *
3805  * RETURNS:
3806  * The bytes per pixel value for the specified plane.
3807  */
3808 int drm_format_plane_cpp(uint32_t format, int plane)
3809 {
3810         unsigned int depth;
3811         int bpp;
3812
3813         if (plane >= drm_format_num_planes(format))
3814                 return 0;
3815
3816         switch (format) {
3817         case DRM_FORMAT_YUYV:
3818         case DRM_FORMAT_YVYU:
3819         case DRM_FORMAT_UYVY:
3820         case DRM_FORMAT_VYUY:
3821                 return 2;
3822         case DRM_FORMAT_NV12:
3823         case DRM_FORMAT_NV21:
3824         case DRM_FORMAT_NV16:
3825         case DRM_FORMAT_NV61:
3826         case DRM_FORMAT_NV24:
3827         case DRM_FORMAT_NV42:
3828                 return plane ? 2 : 1;
3829         case DRM_FORMAT_YUV410:
3830         case DRM_FORMAT_YVU410:
3831         case DRM_FORMAT_YUV411:
3832         case DRM_FORMAT_YVU411:
3833         case DRM_FORMAT_YUV420:
3834         case DRM_FORMAT_YVU420:
3835         case DRM_FORMAT_YUV422:
3836         case DRM_FORMAT_YVU422:
3837         case DRM_FORMAT_YUV444:
3838         case DRM_FORMAT_YVU444:
3839                 return 1;
3840         default:
3841                 drm_fb_get_bpp_depth(format, &depth, &bpp);
3842                 return bpp >> 3;
3843         }
3844 }
3845 EXPORT_SYMBOL(drm_format_plane_cpp);
3846
3847 /**
3848  * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor
3849  * @format: pixel format (DRM_FORMAT_*)
3850  *
3851  * RETURNS:
3852  * The horizontal chroma subsampling factor for the
3853  * specified pixel format.
3854  */
3855 int drm_format_horz_chroma_subsampling(uint32_t format)
3856 {
3857         switch (format) {
3858         case DRM_FORMAT_YUV411:
3859         case DRM_FORMAT_YVU411:
3860         case DRM_FORMAT_YUV410:
3861         case DRM_FORMAT_YVU410:
3862                 return 4;
3863         case DRM_FORMAT_YUYV:
3864         case DRM_FORMAT_YVYU:
3865         case DRM_FORMAT_UYVY:
3866         case DRM_FORMAT_VYUY:
3867         case DRM_FORMAT_NV12:
3868         case DRM_FORMAT_NV21:
3869         case DRM_FORMAT_NV16:
3870         case DRM_FORMAT_NV61:
3871         case DRM_FORMAT_YUV422:
3872         case DRM_FORMAT_YVU422:
3873         case DRM_FORMAT_YUV420:
3874         case DRM_FORMAT_YVU420:
3875                 return 2;
3876         default:
3877                 return 1;
3878         }
3879 }
3880 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling);
3881
3882 /**
3883  * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor
3884  * @format: pixel format (DRM_FORMAT_*)
3885  *
3886  * RETURNS:
3887  * The vertical chroma subsampling factor for the
3888  * specified pixel format.
3889  */
3890 int drm_format_vert_chroma_subsampling(uint32_t format)
3891 {
3892         switch (format) {
3893         case DRM_FORMAT_YUV410:
3894         case DRM_FORMAT_YVU410:
3895                 return 4;
3896         case DRM_FORMAT_YUV420:
3897         case DRM_FORMAT_YVU420:
3898         case DRM_FORMAT_NV12:
3899         case DRM_FORMAT_NV21:
3900                 return 2;
3901         default:
3902                 return 1;
3903         }
3904 }
3905 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling);