drivers/gpu/drm/drm_crtc.c

   1 /*
   2  * Copyright (c) 2006-2008 Intel Corporation
   3  * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
   4  * Copyright (c) 2008 Red Hat Inc.
   5  *
   6  * DRM core CRTC related functions
   7  *
   8  * Permission to use, copy, modify, distribute, and sell this software and its
   9  * documentation for any purpose is hereby granted without fee, provided that
  10  * the above copyright notice appear in all copies and that both that copyright
  11  * notice and this permission notice appear in supporting documentation, and
  12  * that the name of the copyright holders not be used in advertising or
  13  * publicity pertaining to distribution of the software without specific,
  14  * written prior permission.  The copyright holders make no representations
  15  * about the suitability of this software for any purpose.  It is provided "as
  16  * is" without express or implied warranty.
  17  *
  18  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  19  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  20  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  21  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  22  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  23  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  24  * OF THIS SOFTWARE.
  25  *
  26  * Authors:
  27  *      Keith Packard
  28  *      Eric Anholt <eric@anholt.net>
  29  *      Dave Airlie <airlied@linux.ie>
  30  *      Jesse Barnes <jesse.barnes@intel.com>
  31  */
  32 #include <linux/ctype.h>
  33 #include <linux/list.h>
  34 #include <linux/slab.h>
  35 #include <linux/export.h>
  36 #include <drm/drmP.h>
  37 #include <drm/drm_crtc.h>
  38 #include <drm/drm_edid.h>
  39 #include <drm/drm_fourcc.h>
  40
  41 /**
  42  * drm_modeset_lock_all - take all modeset locks
  43  * @dev: drm device
  44  *
  45  * This function takes all modeset locks, suitable where a more fine-grained
  46  * scheme isn't (yet) implemented.
  47  */
  48 void drm_modeset_lock_all(struct drm_device *dev)
  49 {
  50         struct drm_crtc *crtc;
  51
  52         mutex_lock(&dev->mode_config.mutex);
  53
  54         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
  55                 mutex_lock_nest_lock(&crtc->mutex, &dev->mode_config.mutex);
  56 }
  57 EXPORT_SYMBOL(drm_modeset_lock_all);
  58
  59 /**
  60  * drm_modeset_unlock_all - drop all modeset locks
  61  * @dev: device
  62  */
  63 void drm_modeset_unlock_all(struct drm_device *dev)
  64 {
  65         struct drm_crtc *crtc;
  66
  67         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
  68                 mutex_unlock(&crtc->mutex);
  69
  70         mutex_unlock(&dev->mode_config.mutex);
  71 }
  72 EXPORT_SYMBOL(drm_modeset_unlock_all);
  73
  74 /**
  75  * drm_warn_on_modeset_not_all_locked - check that all modeset locks are locked
  76  * @dev: device
  77  */
  78 void drm_warn_on_modeset_not_all_locked(struct drm_device *dev)
  79 {
  80         struct drm_crtc *crtc;
  81
  82         /* Locking is currently fubar in the panic handler. */
  83         if (oops_in_progress)
  84                 return;
  85
  86         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
  87                 WARN_ON(!mutex_is_locked(&crtc->mutex));
  88
  89         WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
  90 }
  91 EXPORT_SYMBOL(drm_warn_on_modeset_not_all_locked);
  92
  93 /* Avoid boilerplate.  I'm tired of typing. */
  94 #define DRM_ENUM_NAME_FN(fnname, list)                          \
  95         const char *fnname(int val)                             \
  96         {                                                       \
  97                 int i;                                          \
  98                 for (i = 0; i < ARRAY_SIZE(list); i++) {        \
  99                         if (list[i].type == val)                \
 100                                 return list[i].name;            \
 101                 }                                               \
 102                 return "(unknown)";                             \
 103         }
 104
 105 /*
 106  * Global properties
 107  */
 108 static const struct drm_prop_enum_list drm_dpms_enum_list[] =
 109 {       { DRM_MODE_DPMS_ON, "On" },
 110         { DRM_MODE_DPMS_STANDBY, "Standby" },
 111         { DRM_MODE_DPMS_SUSPEND, "Suspend" },
 112         { DRM_MODE_DPMS_OFF, "Off" }
 113 };
 114
 115 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
 116
 117 /*
 118  * Optional properties
 119  */
 120 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] =
 121 {
 122         { DRM_MODE_SCALE_NONE, "None" },
 123         { DRM_MODE_SCALE_FULLSCREEN, "Full" },
 124         { DRM_MODE_SCALE_CENTER, "Center" },
 125         { DRM_MODE_SCALE_ASPECT, "Full aspect" },
 126 };
 127
 128 /*
 129  * Non-global properties, but "required" for certain connectors.
 130  */
 131 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] =
 132 {
 133         { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
 134         { DRM_MODE_SUBCONNECTOR_DVID,      "DVI-D"     }, /* DVI-I  */
 135         { DRM_MODE_SUBCONNECTOR_DVIA,      "DVI-A"     }, /* DVI-I  */
 136 };
 137
 138 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
 139
 140 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] =
 141 {
 142         { DRM_MODE_SUBCONNECTOR_Unknown,   "Unknown"   }, /* DVI-I and TV-out */
 143         { DRM_MODE_SUBCONNECTOR_DVID,      "DVI-D"     }, /* DVI-I  */
 144         { DRM_MODE_SUBCONNECTOR_DVIA,      "DVI-A"     }, /* DVI-I  */
 145 };
 146
 147 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
 148                  drm_dvi_i_subconnector_enum_list)
 149
 150 static const struct drm_prop_enum_list drm_tv_select_enum_list[] =
 151 {
 152         { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
 153         { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
 154         { DRM_MODE_SUBCONNECTOR_SVIDEO,    "SVIDEO"    }, /* TV-out */
 155         { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
 156         { DRM_MODE_SUBCONNECTOR_SCART,     "SCART"     }, /* TV-out */
 157 };
 158
 159 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
 160
 161 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] =
 162 {
 163         { DRM_MODE_SUBCONNECTOR_Unknown,   "Unknown"   }, /* DVI-I and TV-out */
 164         { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
 165         { DRM_MODE_SUBCONNECTOR_SVIDEO,    "SVIDEO"    }, /* TV-out */
 166         { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
 167         { DRM_MODE_SUBCONNECTOR_SCART,     "SCART"     }, /* TV-out */
 168 };
 169
 170 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
 171                  drm_tv_subconnector_enum_list)
 172
 173 static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = {
 174         { DRM_MODE_DIRTY_OFF,      "Off"      },
 175         { DRM_MODE_DIRTY_ON,       "On"       },
 176         { DRM_MODE_DIRTY_ANNOTATE, "Annotate" },
 177 };
 178
 179 struct drm_conn_prop_enum_list {
 180         int type;
 181         const char *name;
 182         struct ida ida;
 183 };
 184
 185 /*
 186  * Connector and encoder types.
 187  */
 188 static struct drm_conn_prop_enum_list drm_connector_enum_list[] =
 189 {       { DRM_MODE_CONNECTOR_Unknown, "Unknown" },
 190         { DRM_MODE_CONNECTOR_VGA, "VGA" },
 191         { DRM_MODE_CONNECTOR_DVII, "DVI-I" },
 192         { DRM_MODE_CONNECTOR_DVID, "DVI-D" },
 193         { DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
 194         { DRM_MODE_CONNECTOR_Composite, "Composite" },
 195         { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
 196         { DRM_MODE_CONNECTOR_LVDS, "LVDS" },
 197         { DRM_MODE_CONNECTOR_Component, "Component" },
 198         { DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
 199         { DRM_MODE_CONNECTOR_DisplayPort, "DP" },
 200         { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
 201         { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
 202         { DRM_MODE_CONNECTOR_TV, "TV" },
 203         { DRM_MODE_CONNECTOR_eDP, "eDP" },
 204         { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
 205         { DRM_MODE_CONNECTOR_DSI, "DSI" },
 206 };
 207
 208 static const struct drm_prop_enum_list drm_encoder_enum_list[] =
 209 {       { DRM_MODE_ENCODER_NONE, "None" },
 210         { DRM_MODE_ENCODER_DAC, "DAC" },
 211         { DRM_MODE_ENCODER_TMDS, "TMDS" },
 212         { DRM_MODE_ENCODER_LVDS, "LVDS" },
 213         { DRM_MODE_ENCODER_TVDAC, "TV" },
 214         { DRM_MODE_ENCODER_VIRTUAL, "Virtual" },
 215         { DRM_MODE_ENCODER_DSI, "DSI" },
 216 };
 217
 218 void drm_connector_ida_init(void)
 219 {
 220         int i;
 221
 222         for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
 223                 ida_init(&drm_connector_enum_list[i].ida);
 224 }
 225
 226 void drm_connector_ida_destroy(void)
 227 {
 228         int i;
 229
 230         for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
 231                 ida_destroy(&drm_connector_enum_list[i].ida);
 232 }
 233
 234 const char *drm_get_encoder_name(const struct drm_encoder *encoder)
 235 {
 236         static char buf[32];
 237
 238         snprintf(buf, 32, "%s-%d",
 239                  drm_encoder_enum_list[encoder->encoder_type].name,
 240                  encoder->base.id);
 241         return buf;
 242 }
 243 EXPORT_SYMBOL(drm_get_encoder_name);
 244
 245 const char *drm_get_connector_name(const struct drm_connector *connector)
 246 {
 247         static char buf[32];
 248
 249         snprintf(buf, 32, "%s-%d",
 250                  drm_connector_enum_list[connector->connector_type].name,
 251                  connector->connector_type_id);
 252         return buf;
 253 }
 254 EXPORT_SYMBOL(drm_get_connector_name);
 255
 256 const char *drm_get_connector_status_name(enum drm_connector_status status)
 257 {
 258         if (status == connector_status_connected)
 259                 return "connected";
 260         else if (status == connector_status_disconnected)
 261                 return "disconnected";
 262         else
 263                 return "unknown";
 264 }
 265 EXPORT_SYMBOL(drm_get_connector_status_name);
 266
 267 static char printable_char(int c)
 268 {
 269         return isascii(c) && isprint(c) ? c : '?';
 270 }
 271
 272 const char *drm_get_format_name(uint32_t format)
 273 {
 274         static char buf[32];
 275
 276         snprintf(buf, sizeof(buf),
 277                  "%c%c%c%c %s-endian (0x%08x)",
 278                  printable_char(format & 0xff),
 279                  printable_char((format >> 8) & 0xff),
 280                  printable_char((format >> 16) & 0xff),
 281                  printable_char((format >> 24) & 0x7f),
 282                  format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little",
 283                  format);
 284
 285         return buf;
 286 }
 287 EXPORT_SYMBOL(drm_get_format_name);
 288
 289 /**
 290  * drm_mode_object_get - allocate a new modeset identifier
 291  * @dev: DRM device
 292  * @obj: object pointer, used to generate unique ID
 293  * @obj_type: object type
 294  *
 295  * Create a unique identifier based on @ptr in @dev's identifier space.  Used
 296  * for tracking modes, CRTCs and connectors.
 297  *
 298  * RETURNS:
 299  * New unique (relative to other objects in @dev) integer identifier for the
 300  * object.
 301  */
 302 static int drm_mode_object_get(struct drm_device *dev,
 303                                struct drm_mode_object *obj, uint32_t obj_type)
 304 {
 305         int ret;
 306
 307         mutex_lock(&dev->mode_config.idr_mutex);
 308         ret = idr_alloc(&dev->mode_config.crtc_idr, obj, 1, 0, GFP_KERNEL);
 309         if (ret >= 0) {
 310                 /*
 311                  * Set up the object linking under the protection of the idr
 312                  * lock so that other users can't see inconsistent state.
 313                  */
 314                 obj->id = ret;
 315                 obj->type = obj_type;
 316         }
 317         mutex_unlock(&dev->mode_config.idr_mutex);
 318
 319         return ret < 0 ? ret : 0;
 320 }
 321
 322 /**
 323  * drm_mode_object_put - free a modeset identifer
 324  * @dev: DRM device
 325  * @object: object to free
 326  *
 327  * Free @id from @dev's unique identifier pool.
 328  */
 329 static void drm_mode_object_put(struct drm_device *dev,
 330                                 struct drm_mode_object *object)
 331 {
 332         mutex_lock(&dev->mode_config.idr_mutex);
 333         idr_remove(&dev->mode_config.crtc_idr, object->id);
 334         mutex_unlock(&dev->mode_config.idr_mutex);
 335 }
 336
 337 /**
 338  * drm_mode_object_find - look up a drm object with static lifetime
 339  * @dev: drm device
 340  * @id: id of the mode object
 341  * @type: type of the mode object
 342  *
 343  * Note that framebuffers cannot be looked up with this functions - since those
 344  * are reference counted, they need special treatment.
 345  */
 346 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
 347                 uint32_t id, uint32_t type)
 348 {
 349         struct drm_mode_object *obj = NULL;
 350
 351         /* Framebuffers are reference counted and need their own lookup
 352          * function.*/
 353         WARN_ON(type == DRM_MODE_OBJECT_FB);
 354
 355         mutex_lock(&dev->mode_config.idr_mutex);
 356         obj = idr_find(&dev->mode_config.crtc_idr, id);
 357         if (!obj || (obj->type != type) || (obj->id != id))
 358                 obj = NULL;
 359         mutex_unlock(&dev->mode_config.idr_mutex);
 360
 361         return obj;
 362 }
 363 EXPORT_SYMBOL(drm_mode_object_find);
 364
 365 /**
 366  * drm_framebuffer_init - initialize a framebuffer
 367  * @dev: DRM device
 368  * @fb: framebuffer to be initialized
 369  * @funcs: ... with these functions
 370  *
 371  * Allocates an ID for the framebuffer's parent mode object, sets its mode
 372  * functions & device file and adds it to the master fd list.
 373  *
 374  * IMPORTANT:
 375  * This functions publishes the fb and makes it available for concurrent access
 376  * by other users. Which means by this point the fb _must_ be fully set up -
 377  * since all the fb attributes are invariant over its lifetime, no further
 378  * locking but only correct reference counting is required.
 379  *
 380  * RETURNS:
 381  * Zero on success, error code on failure.
 382  */
 383 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
 384                          const struct drm_framebuffer_funcs *funcs)
 385 {
 386         int ret;
 387
 388         mutex_lock(&dev->mode_config.fb_lock);
 389         kref_init(&fb->refcount);
 390         INIT_LIST_HEAD(&fb->filp_head);
 391         fb->dev = dev;
 392         fb->funcs = funcs;
 393
 394         ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
 395         if (ret)
 396                 goto out;
 397
 398         /* Grab the idr reference. */
 399         drm_framebuffer_reference(fb);
 400
 401         dev->mode_config.num_fb++;
 402         list_add(&fb->head, &dev->mode_config.fb_list);
 403 out:
 404         mutex_unlock(&dev->mode_config.fb_lock);
 405
 406         return 0;
 407 }
 408 EXPORT_SYMBOL(drm_framebuffer_init);
 409
 410 static void drm_framebuffer_free(struct kref *kref)
 411 {
 412         struct drm_framebuffer *fb =
 413                         container_of(kref, struct drm_framebuffer, refcount);
 414         fb->funcs->destroy(fb);
 415 }
 416
 417 static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev,
 418                                                         uint32_t id)
 419 {
 420         struct drm_mode_object *obj = NULL;
 421         struct drm_framebuffer *fb;
 422
 423         mutex_lock(&dev->mode_config.idr_mutex);
 424         obj = idr_find(&dev->mode_config.crtc_idr, id);
 425         if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id))
 426                 fb = NULL;
 427         else
 428                 fb = obj_to_fb(obj);
 429         mutex_unlock(&dev->mode_config.idr_mutex);
 430
 431         return fb;
 432 }
 433
 434 /**
 435  * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
 436  * @dev: drm device
 437  * @id: id of the fb object
 438  *
 439  * If successful, this grabs an additional reference to the framebuffer -
 440  * callers need to make sure to eventually unreference the returned framebuffer
 441  * again.
 442  */
 443 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
 444                                                uint32_t id)
 445 {
 446         struct drm_framebuffer *fb;
 447
 448         mutex_lock(&dev->mode_config.fb_lock);
 449         fb = __drm_framebuffer_lookup(dev, id);
 450         if (fb)
 451                 drm_framebuffer_reference(fb);
 452         mutex_unlock(&dev->mode_config.fb_lock);
 453
 454         return fb;
 455 }
 456 EXPORT_SYMBOL(drm_framebuffer_lookup);
 457
 458 /**
 459  * drm_framebuffer_unreference - unref a framebuffer
 460  * @fb: framebuffer to unref
 461  *
 462  * This functions decrements the fb's refcount and frees it if it drops to zero.
 463  */
 464 void drm_framebuffer_unreference(struct drm_framebuffer *fb)
 465 {
 466         DRM_DEBUG("FB ID: %d\n", fb->base.id);
 467         kref_put(&fb->refcount, drm_framebuffer_free);
 468 }
 469 EXPORT_SYMBOL(drm_framebuffer_unreference);
 470
 471 /**
 472  * drm_framebuffer_reference - incr the fb refcnt
 473  * @fb: framebuffer
 474  */
 475 void drm_framebuffer_reference(struct drm_framebuffer *fb)
 476 {
 477         DRM_DEBUG("FB ID: %d\n", fb->base.id);
 478         kref_get(&fb->refcount);
 479 }
 480 EXPORT_SYMBOL(drm_framebuffer_reference);
 481
 482 static void drm_framebuffer_free_bug(struct kref *kref)
 483 {
 484         BUG();
 485 }
 486
 487 static void __drm_framebuffer_unreference(struct drm_framebuffer *fb)
 488 {
 489         DRM_DEBUG("FB ID: %d\n", fb->base.id);
 490         kref_put(&fb->refcount, drm_framebuffer_free_bug);
 491 }
 492
 493 /* dev->mode_config.fb_lock must be held! */
 494 static void __drm_framebuffer_unregister(struct drm_device *dev,
 495                                          struct drm_framebuffer *fb)
 496 {
 497         mutex_lock(&dev->mode_config.idr_mutex);
 498         idr_remove(&dev->mode_config.crtc_idr, fb->base.id);
 499         mutex_unlock(&dev->mode_config.idr_mutex);
 500
 501         fb->base.id = 0;
 502
 503         __drm_framebuffer_unreference(fb);
 504 }
 505
 506 /**
 507  * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
 508  * @fb: fb to unregister
 509  *
 510  * Drivers need to call this when cleaning up driver-private framebuffers, e.g.
 511  * those used for fbdev. Note that the caller must hold a reference of it's own,
 512  * i.e. the object may not be destroyed through this call (since it'll lead to a
 513  * locking inversion).
 514  */
 515 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
 516 {
 517         struct drm_device *dev = fb->dev;
 518
 519         mutex_lock(&dev->mode_config.fb_lock);
 520         /* Mark fb as reaped and drop idr ref. */
 521         __drm_framebuffer_unregister(dev, fb);
 522         mutex_unlock(&dev->mode_config.fb_lock);
 523 }
 524 EXPORT_SYMBOL(drm_framebuffer_unregister_private);
 525
 526 /**
 527  * drm_framebuffer_cleanup - remove a framebuffer object
 528  * @fb: framebuffer to remove
 529  *
 530  * Cleanup references to a user-created framebuffer. This function is intended
 531  * to be used from the drivers ->destroy callback.
 532  *
 533  * Note that this function does not remove the fb from active usuage - if it is
 534  * still used anywhere, hilarity can ensue since userspace could call getfb on
 535  * the id and get back -EINVAL. Obviously no concern at driver unload time.
 536  *
 537  * Also, the framebuffer will not be removed from the lookup idr - for
 538  * user-created framebuffers this will happen in in the rmfb ioctl. For
 539  * driver-private objects (e.g. for fbdev) drivers need to explicitly call
 540  * drm_framebuffer_unregister_private.
 541  */
 542 void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
 543 {
 544         struct drm_device *dev = fb->dev;
 545
 546         mutex_lock(&dev->mode_config.fb_lock);
 547         list_del(&fb->head);
 548         dev->mode_config.num_fb--;
 549         mutex_unlock(&dev->mode_config.fb_lock);
 550 }
 551 EXPORT_SYMBOL(drm_framebuffer_cleanup);
 552
 553 /**
 554  * drm_framebuffer_remove - remove and unreference a framebuffer object
 555  * @fb: framebuffer to remove
 556  *
 557  * Scans all the CRTCs and planes in @dev's mode_config.  If they're
 558  * using @fb, removes it, setting it to NULL. Then drops the reference to the
 559  * passed-in framebuffer. Might take the modeset locks.
 560  *
 561  * Note that this function optimizes the cleanup away if the caller holds the
 562  * last reference to the framebuffer. It is also guaranteed to not take the
 563  * modeset locks in this case.
 564  */
 565 void drm_framebuffer_remove(struct drm_framebuffer *fb)
 566 {
 567         struct drm_device *dev = fb->dev;
 568         struct drm_crtc *crtc;
 569         struct drm_plane *plane;
 570         struct drm_mode_set set;
 571         int ret;
 572
 573         WARN_ON(!list_empty(&fb->filp_head));
 574
 575         /*
 576          * drm ABI mandates that we remove any deleted framebuffers from active
 577          * useage. But since most sane clients only remove framebuffers they no
 578          * longer need, try to optimize this away.
 579          *
 580          * Since we're holding a reference ourselves, observing a refcount of 1
 581          * means that we're the last holder and can skip it. Also, the refcount
 582          * can never increase from 1 again, so we don't need any barriers or
 583          * locks.
 584          *
 585          * Note that userspace could try to race with use and instate a new
 586          * usage _after_ we've cleared all current ones. End result will be an
 587          * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
 588          * in this manner.
 589          */
 590         if (atomic_read(&fb->refcount.refcount) > 1) {
 591                 drm_modeset_lock_all(dev);
 592                 /* remove from any CRTC */
 593                 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 594                         if (crtc->fb == fb) {
 595                                 /* should turn off the crtc */
 596                                 memset(&set, 0, sizeof(struct drm_mode_set));
 597                                 set.crtc = crtc;
 598                                 set.fb = NULL;
 599                                 ret = drm_mode_set_config_internal(&set);
 600                                 if (ret)
 601                                         DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
 602                         }
 603                 }
 604
 605                 list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
 606                         if (plane->fb == fb)
 607                                 drm_plane_force_disable(plane);
 608                 }
 609                 drm_modeset_unlock_all(dev);
 610         }
 611
 612         drm_framebuffer_unreference(fb);
 613 }
 614 EXPORT_SYMBOL(drm_framebuffer_remove);
 615
 616 /**
 617  * drm_crtc_init - Initialise a new CRTC object
 618  * @dev: DRM device
 619  * @crtc: CRTC object to init
 620  * @funcs: callbacks for the new CRTC
 621  *
 622  * Inits a new object created as base part of a driver crtc object.
 623  *
 624  * RETURNS:
 625  * Zero on success, error code on failure.
 626  */
 627 int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
 628                    const struct drm_crtc_funcs *funcs)
 629 {
 630         int ret;
 631
 632         crtc->dev = dev;
 633         crtc->funcs = funcs;
 634         crtc->invert_dimensions = false;
 635
 636         drm_modeset_lock_all(dev);
 637         mutex_init(&crtc->mutex);
 638         mutex_lock_nest_lock(&crtc->mutex, &dev->mode_config.mutex);
 639
 640         ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
 641         if (ret)
 642                 goto out;
 643
 644         crtc->base.properties = &crtc->properties;
 645
 646         list_add_tail(&crtc->head, &dev->mode_config.crtc_list);
 647         dev->mode_config.num_crtc++;
 648
 649  out:
 650         drm_modeset_unlock_all(dev);
 651
 652         return ret;
 653 }
 654 EXPORT_SYMBOL(drm_crtc_init);
 655
 656 /**
 657  * drm_crtc_cleanup - Clean up the core crtc usage
 658  * @crtc: CRTC to cleanup
 659  *
 660  * This function cleans up @crtc and removes it from the DRM mode setting
 661  * core. Note that the function does *not* free the crtc structure itself,
 662  * this is the responsibility of the caller.
 663  */
 664 void drm_crtc_cleanup(struct drm_crtc *crtc)
 665 {
 666         struct drm_device *dev = crtc->dev;
 667
 668         kfree(crtc->gamma_store);
 669         crtc->gamma_store = NULL;
 670
 671         drm_mode_object_put(dev, &crtc->base);
 672         list_del(&crtc->head);
 673         dev->mode_config.num_crtc--;
 674 }
 675 EXPORT_SYMBOL(drm_crtc_cleanup);
 676
 677 /**
 678  * drm_crtc_index - find the index of a registered CRTC
 679  * @crtc: CRTC to find index for
 680  *
 681  * Given a registered CRTC, return the index of that CRTC within a DRM
 682  * device's list of CRTCs.
 683  */
 684 unsigned int drm_crtc_index(struct drm_crtc *crtc)
 685 {
 686         unsigned int index = 0;
 687         struct drm_crtc *tmp;
 688
 689         list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) {
 690                 if (tmp == crtc)
 691                         return index;
 692
 693                 index++;
 694         }
 695
 696         BUG();
 697 }
 698 EXPORT_SYMBOL(drm_crtc_index);
 699
 700 /**
 701  * drm_mode_probed_add - add a mode to a connector's probed mode list
 702  * @connector: connector the new mode
 703  * @mode: mode data
 704  *
 705  * Add @mode to @connector's mode list for later use.
 706  */
 707 void drm_mode_probed_add(struct drm_connector *connector,
 708                          struct drm_display_mode *mode)
 709 {
 710         list_add_tail(&mode->head, &connector->probed_modes);
 711 }
 712 EXPORT_SYMBOL(drm_mode_probed_add);
 713
 714 /*
 715  * drm_mode_remove - remove and free a mode
 716  * @connector: connector list to modify
 717  * @mode: mode to remove
 718  *
 719  * Remove @mode from @connector's mode list, then free it.
 720  */
 721 static void drm_mode_remove(struct drm_connector *connector,
 722                             struct drm_display_mode *mode)
 723 {
 724         list_del(&mode->head);
 725         drm_mode_destroy(connector->dev, mode);
 726 }
 727
 728 /**
 729  * drm_connector_init - Init a preallocated connector
 730  * @dev: DRM device
 731  * @connector: the connector to init
 732  * @funcs: callbacks for this connector
 733  * @connector_type: user visible type of the connector
 734  *
 735  * Initialises a preallocated connector. Connectors should be
 736  * subclassed as part of driver connector objects.
 737  *
 738  * RETURNS:
 739  * Zero on success, error code on failure.
 740  */
 741 int drm_connector_init(struct drm_device *dev,
 742                        struct drm_connector *connector,
 743                        const struct drm_connector_funcs *funcs,
 744                        int connector_type)
 745 {
 746         int ret;
 747         struct ida *connector_ida =
 748                 &drm_connector_enum_list[connector_type].ida;
 749
 750         drm_modeset_lock_all(dev);
 751
 752         ret = drm_mode_object_get(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR);
 753         if (ret)
 754                 goto out;
 755
 756         connector->base.properties = &connector->properties;
 757         connector->dev = dev;
 758         connector->funcs = funcs;
 759         connector->connector_type = connector_type;
 760         connector->connector_type_id =
 761                 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
 762         if (connector->connector_type_id < 0) {
 763                 ret = connector->connector_type_id;
 764                 drm_mode_object_put(dev, &connector->base);
 765                 goto out;
 766         }
 767         INIT_LIST_HEAD(&connector->probed_modes);
 768         INIT_LIST_HEAD(&connector->modes);
 769         connector->edid_blob_ptr = NULL;
 770         connector->status = connector_status_unknown;
 771
 772         list_add_tail(&connector->head, &dev->mode_config.connector_list);
 773         dev->mode_config.num_connector++;
 774
 775         if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
 776                 drm_object_attach_property(&connector->base,
 777                                               dev->mode_config.edid_property,
 778                                               0);
 779
 780         drm_object_attach_property(&connector->base,
 781                                       dev->mode_config.dpms_property, 0);
 782
 783  out:
 784         drm_modeset_unlock_all(dev);
 785
 786         return ret;
 787 }
 788 EXPORT_SYMBOL(drm_connector_init);
 789
 790 /**
 791  * drm_connector_cleanup - cleans up an initialised connector
 792  * @connector: connector to cleanup
 793  *
 794  * Cleans up the connector but doesn't free the object.
 795  */
 796 void drm_connector_cleanup(struct drm_connector *connector)
 797 {
 798         struct drm_device *dev = connector->dev;
 799         struct drm_display_mode *mode, *t;
 800
 801         list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
 802                 drm_mode_remove(connector, mode);
 803
 804         list_for_each_entry_safe(mode, t, &connector->modes, head)
 805                 drm_mode_remove(connector, mode);
 806
 807         ida_remove(&drm_connector_enum_list[connector->connector_type].ida,
 808                    connector->connector_type_id);
 809
 810         drm_mode_object_put(dev, &connector->base);
 811         list_del(&connector->head);
 812         dev->mode_config.num_connector--;
 813 }
 814 EXPORT_SYMBOL(drm_connector_cleanup);
 815
 816 void drm_connector_unplug_all(struct drm_device *dev)
 817 {
 818         struct drm_connector *connector;
 819
 820         /* taking the mode config mutex ends up in a clash with sysfs */
 821         list_for_each_entry(connector, &dev->mode_config.connector_list, head)
 822                 drm_sysfs_connector_remove(connector);
 823
 824 }
 825 EXPORT_SYMBOL(drm_connector_unplug_all);
 826
 827 int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge,
 828                 const struct drm_bridge_funcs *funcs)
 829 {
 830         int ret;
 831
 832         drm_modeset_lock_all(dev);
 833
 834         ret = drm_mode_object_get(dev, &bridge->base, DRM_MODE_OBJECT_BRIDGE);
 835         if (ret)
 836                 goto out;
 837
 838         bridge->dev = dev;
 839         bridge->funcs = funcs;
 840
 841         list_add_tail(&bridge->head, &dev->mode_config.bridge_list);
 842         dev->mode_config.num_bridge++;
 843
 844  out:
 845         drm_modeset_unlock_all(dev);
 846         return ret;
 847 }
 848 EXPORT_SYMBOL(drm_bridge_init);
 849
 850 void drm_bridge_cleanup(struct drm_bridge *bridge)
 851 {
 852         struct drm_device *dev = bridge->dev;
 853
 854         drm_modeset_lock_all(dev);
 855         drm_mode_object_put(dev, &bridge->base);
 856         list_del(&bridge->head);
 857         dev->mode_config.num_bridge--;
 858         drm_modeset_unlock_all(dev);
 859 }
 860 EXPORT_SYMBOL(drm_bridge_cleanup);
 861
 862 int drm_encoder_init(struct drm_device *dev,
 863                       struct drm_encoder *encoder,
 864                       const struct drm_encoder_funcs *funcs,
 865                       int encoder_type)
 866 {
 867         int ret;
 868
 869         drm_modeset_lock_all(dev);
 870
 871         ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
 872         if (ret)
 873                 goto out;
 874
 875         encoder->dev = dev;
 876         encoder->encoder_type = encoder_type;
 877         encoder->funcs = funcs;
 878
 879         list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
 880         dev->mode_config.num_encoder++;
 881
 882  out:
 883         drm_modeset_unlock_all(dev);
 884
 885         return ret;
 886 }
 887 EXPORT_SYMBOL(drm_encoder_init);
 888
 889 void drm_encoder_cleanup(struct drm_encoder *encoder)
 890 {
 891         struct drm_device *dev = encoder->dev;
 892         drm_modeset_lock_all(dev);
 893         drm_mode_object_put(dev, &encoder->base);
 894         list_del(&encoder->head);
 895         dev->mode_config.num_encoder--;
 896         drm_modeset_unlock_all(dev);
 897 }
 898 EXPORT_SYMBOL(drm_encoder_cleanup);
 899
 900 /**
 901  * drm_plane_init - Initialise a new plane object
 902  * @dev: DRM device
 903  * @plane: plane object to init
 904  * @possible_crtcs: bitmask of possible CRTCs
 905  * @funcs: callbacks for the new plane
 906  * @formats: array of supported formats (%DRM_FORMAT_*)
 907  * @format_count: number of elements in @formats
 908  * @priv: plane is private (hidden from userspace)?
 909  *
 910  * Inits a new object created as base part of a driver plane object.
 911  *
 912  * RETURNS:
 913  * Zero on success, error code on failure.
 914  */
 915 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
 916                    unsigned long possible_crtcs,
 917                    const struct drm_plane_funcs *funcs,
 918                    const uint32_t *formats, uint32_t format_count,
 919                    bool priv)
 920 {
 921         int ret;
 922
 923         drm_modeset_lock_all(dev);
 924
 925         ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
 926         if (ret)
 927                 goto out;
 928
 929         plane->base.properties = &plane->properties;
 930         plane->dev = dev;
 931         plane->funcs = funcs;
 932         plane->format_types = kmalloc(sizeof(uint32_t) * format_count,
 933                                       GFP_KERNEL);
 934         if (!plane->format_types) {
 935                 DRM_DEBUG_KMS("out of memory when allocating plane\n");
 936                 drm_mode_object_put(dev, &plane->base);
 937                 ret = -ENOMEM;
 938                 goto out;
 939         }
 940
 941         memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
 942         plane->format_count = format_count;
 943         plane->possible_crtcs = possible_crtcs;
 944
 945         /* private planes are not exposed to userspace, but depending on
 946          * display hardware, might be convenient to allow sharing programming
 947          * for the scanout engine with the crtc implementation.
 948          */
 949         if (!priv) {
 950                 list_add_tail(&plane->head, &dev->mode_config.plane_list);
 951                 dev->mode_config.num_plane++;
 952         } else {
 953                 INIT_LIST_HEAD(&plane->head);
 954         }
 955
 956  out:
 957         drm_modeset_unlock_all(dev);
 958
 959         return ret;
 960 }
 961 EXPORT_SYMBOL(drm_plane_init);
 962
 963 /**
 964  * drm_plane_cleanup - Clean up the core plane usage
 965  * @plane: plane to cleanup
 966  *
 967  * This function cleans up @plane and removes it from the DRM mode setting
 968  * core. Note that the function does *not* free the plane structure itself,
 969  * this is the responsibility of the caller.
 970  */
 971 void drm_plane_cleanup(struct drm_plane *plane)
 972 {
 973         struct drm_device *dev = plane->dev;
 974
 975         drm_modeset_lock_all(dev);
 976         kfree(plane->format_types);
 977         drm_mode_object_put(dev, &plane->base);
 978         /* if not added to a list, it must be a private plane */
 979         if (!list_empty(&plane->head)) {
 980                 list_del(&plane->head);
 981                 dev->mode_config.num_plane--;
 982         }
 983         drm_modeset_unlock_all(dev);
 984 }
 985 EXPORT_SYMBOL(drm_plane_cleanup);
 986
 987 /**
 988  * drm_plane_force_disable - Forcibly disable a plane
 989  * @plane: plane to disable
 990  *
 991  * Forces the plane to be disabled.
 992  *
 993  * Used when the plane's current framebuffer is destroyed,
 994  * and when restoring fbdev mode.
 995  */
 996 void drm_plane_force_disable(struct drm_plane *plane)
 997 {
 998         int ret;
 999
1000         if (!plane->fb)
1001                 return;
1002
1003         ret = plane->funcs->disable_plane(plane);
1004         if (ret)
1005                 DRM_ERROR("failed to disable plane with busy fb\n");
1006         /* disconnect the plane from the fb and crtc: */
1007         __drm_framebuffer_unreference(plane->fb);
1008         plane->fb = NULL;
1009         plane->crtc = NULL;
1010 }
1011 EXPORT_SYMBOL(drm_plane_force_disable);
1012
1013 /**
1014  * drm_mode_create - create a new display mode
1015  * @dev: DRM device
1016  *
1017  * Create a new drm_display_mode, give it an ID, and return it.
1018  *
1019  * RETURNS:
1020  * Pointer to new mode on success, NULL on error.
1021  */
1022 struct drm_display_mode *drm_mode_create(struct drm_device *dev)
1023 {
1024         struct drm_display_mode *nmode;
1025
1026         nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL);
1027         if (!nmode)
1028                 return NULL;
1029
1030         if (drm_mode_object_get(dev, &nmode->base, DRM_MODE_OBJECT_MODE)) {
1031                 kfree(nmode);
1032                 return NULL;
1033         }
1034
1035         return nmode;
1036 }
1037 EXPORT_SYMBOL(drm_mode_create);
1038
1039 /**
1040  * drm_mode_destroy - remove a mode
1041  * @dev: DRM device
1042  * @mode: mode to remove
1043  *
1044  * Free @mode's unique identifier, then free it.
1045  */
1046 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode)
1047 {
1048         if (!mode)
1049                 return;
1050
1051         drm_mode_object_put(dev, &mode->base);
1052
1053         kfree(mode);
1054 }
1055 EXPORT_SYMBOL(drm_mode_destroy);
1056
1057 static int drm_mode_create_standard_connector_properties(struct drm_device *dev)
1058 {
1059         struct drm_property *edid;
1060         struct drm_property *dpms;
1061
1062         /*
1063          * Standard properties (apply to all connectors)
1064          */
1065         edid = drm_property_create(dev, DRM_MODE_PROP_BLOB |
1066                                    DRM_MODE_PROP_IMMUTABLE,
1067                                    "EDID", 0);
1068         dev->mode_config.edid_property = edid;
1069
1070         dpms = drm_property_create_enum(dev, 0,
1071                                    "DPMS", drm_dpms_enum_list,
1072                                    ARRAY_SIZE(drm_dpms_enum_list));
1073         dev->mode_config.dpms_property = dpms;
1074
1075         return 0;
1076 }
1077
1078 /**
1079  * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
1080  * @dev: DRM device
1081  *
1082  * Called by a driver the first time a DVI-I connector is made.
1083  */
1084 int drm_mode_create_dvi_i_properties(struct drm_device *dev)
1085 {
1086         struct drm_property *dvi_i_selector;
1087         struct drm_property *dvi_i_subconnector;
1088
1089         if (dev->mode_config.dvi_i_select_subconnector_property)
1090                 return 0;
1091
1092         dvi_i_selector =
1093                 drm_property_create_enum(dev, 0,
1094                                     "select subconnector",
1095                                     drm_dvi_i_select_enum_list,
1096                                     ARRAY_SIZE(drm_dvi_i_select_enum_list));
1097         dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
1098
1099         dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1100                                     "subconnector",
1101                                     drm_dvi_i_subconnector_enum_list,
1102                                     ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
1103         dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
1104
1105         return 0;
1106 }
1107 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
1108
1109 /**
1110  * drm_create_tv_properties - create TV specific connector properties
1111  * @dev: DRM device
1112  * @num_modes: number of different TV formats (modes) supported
1113  * @modes: array of pointers to strings containing name of each format
1114  *
1115  * Called by a driver's TV initialization routine, this function creates
1116  * the TV specific connector properties for a given device.  Caller is
1117  * responsible for allocating a list of format names and passing them to
1118  * this routine.
1119  */
1120 int drm_mode_create_tv_properties(struct drm_device *dev, int num_modes,
1121                                   char *modes[])
1122 {
1123         struct drm_property *tv_selector;
1124         struct drm_property *tv_subconnector;
1125         int i;
1126
1127         if (dev->mode_config.tv_select_subconnector_property)
1128                 return 0;
1129
1130         /*
1131          * Basic connector properties
1132          */
1133         tv_selector = drm_property_create_enum(dev, 0,
1134                                           "select subconnector",
1135                                           drm_tv_select_enum_list,
1136                                           ARRAY_SIZE(drm_tv_select_enum_list));
1137         dev->mode_config.tv_select_subconnector_property = tv_selector;
1138
1139         tv_subconnector =
1140                 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1141                                     "subconnector",
1142                                     drm_tv_subconnector_enum_list,
1143                                     ARRAY_SIZE(drm_tv_subconnector_enum_list));
1144         dev->mode_config.tv_subconnector_property = tv_subconnector;
1145
1146         /*
1147          * Other, TV specific properties: margins & TV modes.
1148          */
1149         dev->mode_config.tv_left_margin_property =
1150                 drm_property_create_range(dev, 0, "left margin", 0, 100);
1151
1152         dev->mode_config.tv_right_margin_property =
1153                 drm_property_create_range(dev, 0, "right margin", 0, 100);
1154
1155         dev->mode_config.tv_top_margin_property =
1156                 drm_property_create_range(dev, 0, "top margin", 0, 100);
1157
1158         dev->mode_config.tv_bottom_margin_property =
1159                 drm_property_create_range(dev, 0, "bottom margin", 0, 100);
1160
1161         dev->mode_config.tv_mode_property =
1162                 drm_property_create(dev, DRM_MODE_PROP_ENUM,
1163                                     "mode", num_modes);
1164         for (i = 0; i < num_modes; i++)
1165                 drm_property_add_enum(dev->mode_config.tv_mode_property, i,
1166                                       i, modes[i]);
1167
1168         dev->mode_config.tv_brightness_property =
1169                 drm_property_create_range(dev, 0, "brightness", 0, 100);
1170
1171         dev->mode_config.tv_contrast_property =
1172                 drm_property_create_range(dev, 0, "contrast", 0, 100);
1173
1174         dev->mode_config.tv_flicker_reduction_property =
1175                 drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
1176
1177         dev->mode_config.tv_overscan_property =
1178                 drm_property_create_range(dev, 0, "overscan", 0, 100);
1179
1180         dev->mode_config.tv_saturation_property =
1181                 drm_property_create_range(dev, 0, "saturation", 0, 100);
1182
1183         dev->mode_config.tv_hue_property =
1184                 drm_property_create_range(dev, 0, "hue", 0, 100);
1185
1186         return 0;
1187 }
1188 EXPORT_SYMBOL(drm_mode_create_tv_properties);
1189
1190 /**
1191  * drm_mode_create_scaling_mode_property - create scaling mode property
1192  * @dev: DRM device
1193  *
1194  * Called by a driver the first time it's needed, must be attached to desired
1195  * connectors.
1196  */
1197 int drm_mode_create_scaling_mode_property(struct drm_device *dev)
1198 {
1199         struct drm_property *scaling_mode;
1200
1201         if (dev->mode_config.scaling_mode_property)
1202                 return 0;
1203
1204         scaling_mode =
1205                 drm_property_create_enum(dev, 0, "scaling mode",
1206                                 drm_scaling_mode_enum_list,
1207                                     ARRAY_SIZE(drm_scaling_mode_enum_list));
1208
1209         dev->mode_config.scaling_mode_property = scaling_mode;
1210
1211         return 0;
1212 }
1213 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
1214
1215 /**
1216  * drm_mode_create_dirty_property - create dirty property
1217  * @dev: DRM device
1218  *
1219  * Called by a driver the first time it's needed, must be attached to desired
1220  * connectors.
1221  */
1222 int drm_mode_create_dirty_info_property(struct drm_device *dev)
1223 {
1224         struct drm_property *dirty_info;
1225
1226         if (dev->mode_config.dirty_info_property)
1227                 return 0;
1228
1229         dirty_info =
1230                 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1231                                     "dirty",
1232                                     drm_dirty_info_enum_list,
1233                                     ARRAY_SIZE(drm_dirty_info_enum_list));
1234         dev->mode_config.dirty_info_property = dirty_info;
1235
1236         return 0;
1237 }
1238 EXPORT_SYMBOL(drm_mode_create_dirty_info_property);
1239
1240 static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group)
1241 {
1242         uint32_t total_objects = 0;
1243
1244         total_objects += dev->mode_config.num_crtc;
1245         total_objects += dev->mode_config.num_connector;
1246         total_objects += dev->mode_config.num_encoder;
1247         total_objects += dev->mode_config.num_bridge;
1248
1249         group->id_list = kzalloc(total_objects * sizeof(uint32_t), GFP_KERNEL);
1250         if (!group->id_list)
1251                 return -ENOMEM;
1252
1253         group->num_crtcs = 0;
1254         group->num_connectors = 0;
1255         group->num_encoders = 0;
1256         group->num_bridges = 0;
1257         return 0;
1258 }
1259
1260 int drm_mode_group_init_legacy_group(struct drm_device *dev,
1261                                      struct drm_mode_group *group)
1262 {
1263         struct drm_crtc *crtc;
1264         struct drm_encoder *encoder;
1265         struct drm_connector *connector;
1266         struct drm_bridge *bridge;
1267         int ret;
1268
1269         if ((ret = drm_mode_group_init(dev, group)))
1270                 return ret;
1271
1272         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
1273                 group->id_list[group->num_crtcs++] = crtc->base.id;
1274
1275         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
1276                 group->id_list[group->num_crtcs + group->num_encoders++] =
1277                 encoder->base.id;
1278
1279         list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1280                 group->id_list[group->num_crtcs + group->num_encoders +
1281                                group->num_connectors++] = connector->base.id;
1282
1283         list_for_each_entry(bridge, &dev->mode_config.bridge_list, head)
1284                 group->id_list[group->num_crtcs + group->num_encoders +
1285                                group->num_connectors + group->num_bridges++] =
1286                                         bridge->base.id;
1287
1288         return 0;
1289 }
1290 EXPORT_SYMBOL(drm_mode_group_init_legacy_group);
1291
1292 /**
1293  * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
1294  * @out: drm_mode_modeinfo struct to return to the user
1295  * @in: drm_display_mode to use
1296  *
1297  * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to
1298  * the user.
1299  */
1300 static void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out,
1301                                       const struct drm_display_mode *in)
1302 {
1303         WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX ||
1304              in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX ||
1305              in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX ||
1306              in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX ||
1307              in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX,
1308              "timing values too large for mode info\n");
1309
1310         out->clock = in->clock;
1311         out->hdisplay = in->hdisplay;
1312         out->hsync_start = in->hsync_start;
1313         out->hsync_end = in->hsync_end;
1314         out->htotal = in->htotal;
1315         out->hskew = in->hskew;
1316         out->vdisplay = in->vdisplay;
1317         out->vsync_start = in->vsync_start;
1318         out->vsync_end = in->vsync_end;
1319         out->vtotal = in->vtotal;
1320         out->vscan = in->vscan;
1321         out->vrefresh = in->vrefresh;
1322         out->flags = in->flags;
1323         out->type = in->type;
1324         strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1325         out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1326 }
1327
1328 /**
1329  * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode
1330  * @out: drm_display_mode to return to the user
1331  * @in: drm_mode_modeinfo to use
1332  *
1333  * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to
1334  * the caller.
1335  *
1336  * RETURNS:
1337  * Zero on success, errno on failure.
1338  */
1339 static int drm_crtc_convert_umode(struct drm_display_mode *out,
1340                                   const struct drm_mode_modeinfo *in)
1341 {
1342         if (in->clock > INT_MAX || in->vrefresh > INT_MAX)
1343                 return -ERANGE;
1344
1345         if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX)
1346                 return -EINVAL;
1347
1348         out->clock = in->clock;
1349         out->hdisplay = in->hdisplay;
1350         out->hsync_start = in->hsync_start;
1351         out->hsync_end = in->hsync_end;
1352         out->htotal = in->htotal;
1353         out->hskew = in->hskew;
1354         out->vdisplay = in->vdisplay;
1355         out->vsync_start = in->vsync_start;
1356         out->vsync_end = in->vsync_end;
1357         out->vtotal = in->vtotal;
1358         out->vscan = in->vscan;
1359         out->vrefresh = in->vrefresh;
1360         out->flags = in->flags;
1361         out->type = in->type;
1362         strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
1363         out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
1364
1365         return 0;
1366 }
1367
1368 /**
1369  * drm_mode_getresources - get graphics configuration
1370  * @dev: drm device for the ioctl
1371  * @data: data pointer for the ioctl
1372  * @file_priv: drm file for the ioctl call
1373  *
1374  * Construct a set of configuration description structures and return
1375  * them to the user, including CRTC, connector and framebuffer configuration.
1376  *
1377  * Called by the user via ioctl.
1378  *
1379  * RETURNS:
1380  * Zero on success, errno on failure.
1381  */
1382 int drm_mode_getresources(struct drm_device *dev, void *data,
1383                           struct drm_file *file_priv)
1384 {
1385         struct drm_mode_card_res *card_res = data;
1386         struct list_head *lh;
1387         struct drm_framebuffer *fb;
1388         struct drm_connector *connector;
1389         struct drm_crtc *crtc;
1390         struct drm_encoder *encoder;
1391         int ret = 0;
1392         int connector_count = 0;
1393         int crtc_count = 0;
1394         int fb_count = 0;
1395         int encoder_count = 0;
1396         int copied = 0, i;
1397         uint32_t __user *fb_id;
1398         uint32_t __user *crtc_id;
1399         uint32_t __user *connector_id;
1400         uint32_t __user *encoder_id;
1401         struct drm_mode_group *mode_group;
1402
1403         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1404                 return -EINVAL;
1405
1406
1407         mutex_lock(&file_priv->fbs_lock);
1408         /*
1409          * For the non-control nodes we need to limit the list of resources
1410          * by IDs in the group list for this node
1411          */
1412         list_for_each(lh, &file_priv->fbs)
1413                 fb_count++;
1414
1415         /* handle this in 4 parts */
1416         /* FBs */
1417         if (card_res->count_fbs >= fb_count) {
1418                 copied = 0;
1419                 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
1420                 list_for_each_entry(fb, &file_priv->fbs, filp_head) {
1421                         if (put_user(fb->base.id, fb_id + copied)) {
1422                                 mutex_unlock(&file_priv->fbs_lock);
1423                                 return -EFAULT;
1424                         }
1425                         copied++;
1426                 }
1427         }
1428         card_res->count_fbs = fb_count;
1429         mutex_unlock(&file_priv->fbs_lock);
1430
1431         drm_modeset_lock_all(dev);
1432         if (file_priv->minor->type != DRM_MINOR_LEGACY) {
1433
1434                 mode_group = NULL;
1435                 list_for_each(lh, &dev->mode_config.crtc_list)
1436                         crtc_count++;
1437
1438                 list_for_each(lh, &dev->mode_config.connector_list)
1439                         connector_count++;
1440
1441                 list_for_each(lh, &dev->mode_config.encoder_list)
1442                         encoder_count++;
1443         } else {
1444
1445                 mode_group = &file_priv->master->minor->mode_group;
1446                 crtc_count = mode_group->num_crtcs;
1447                 connector_count = mode_group->num_connectors;
1448                 encoder_count = mode_group->num_encoders;
1449         }
1450
1451         card_res->max_height = dev->mode_config.max_height;
1452         card_res->min_height = dev->mode_config.min_height;
1453         card_res->max_width = dev->mode_config.max_width;
1454         card_res->min_width = dev->mode_config.min_width;
1455
1456         /* CRTCs */
1457         if (card_res->count_crtcs >= crtc_count) {
1458                 copied = 0;
1459                 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
1460                 if (!mode_group) {
1461                         list_for_each_entry(crtc, &dev->mode_config.crtc_list,
1462                                             head) {
1463                                 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
1464                                 if (put_user(crtc->base.id, crtc_id + copied)) {
1465                                         ret = -EFAULT;
1466                                         goto out;
1467                                 }
1468                                 copied++;
1469                         }
1470                 } else {
1471                         for (i = 0; i < mode_group->num_crtcs; i++) {
1472                                 if (put_user(mode_group->id_list[i],
1473                                              crtc_id + copied)) {
1474                                         ret = -EFAULT;
1475                                         goto out;
1476                                 }
1477                                 copied++;
1478                         }
1479                 }
1480         }
1481         card_res->count_crtcs = crtc_count;
1482
1483         /* Encoders */
1484         if (card_res->count_encoders >= encoder_count) {
1485                 copied = 0;
1486                 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr;
1487                 if (!mode_group) {
1488                         list_for_each_entry(encoder,
1489                                             &dev->mode_config.encoder_list,
1490                                             head) {
1491                                 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id,
1492                                                 drm_get_encoder_name(encoder));
1493                                 if (put_user(encoder->base.id, encoder_id +
1494                                              copied)) {
1495                                         ret = -EFAULT;
1496                                         goto out;
1497                                 }
1498                                 copied++;
1499                         }
1500                 } else {
1501                         for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) {
1502                                 if (put_user(mode_group->id_list[i],
1503                                              encoder_id + copied)) {
1504                                         ret = -EFAULT;
1505                                         goto out;
1506                                 }
1507                                 copied++;
1508                         }
1509
1510                 }
1511         }
1512         card_res->count_encoders = encoder_count;
1513
1514         /* Connectors */
1515         if (card_res->count_connectors >= connector_count) {
1516                 copied = 0;
1517                 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr;
1518                 if (!mode_group) {
1519                         list_for_each_entry(connector,
1520                                             &dev->mode_config.connector_list,
1521                                             head) {
1522                                 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
1523                                         connector->base.id,
1524                                         drm_get_connector_name(connector));
1525                                 if (put_user(connector->base.id,
1526                                              connector_id + copied)) {
1527                                         ret = -EFAULT;
1528                                         goto out;
1529                                 }
1530                                 copied++;
1531                         }
1532                 } else {
1533                         int start = mode_group->num_crtcs +
1534                                 mode_group->num_encoders;
1535                         for (i = start; i < start + mode_group->num_connectors; i++) {
1536                                 if (put_user(mode_group->id_list[i],
1537                                              connector_id + copied)) {
1538                                         ret = -EFAULT;
1539                                         goto out;
1540                                 }
1541                                 copied++;
1542                         }
1543                 }
1544         }
1545         card_res->count_connectors = connector_count;
1546
1547         DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs,
1548                   card_res->count_connectors, card_res->count_encoders);
1549
1550 out:
1551         drm_modeset_unlock_all(dev);
1552         return ret;
1553 }
1554
1555 /**
1556  * drm_mode_getcrtc - get CRTC configuration
1557  * @dev: drm device for the ioctl
1558  * @data: data pointer for the ioctl
1559  * @file_priv: drm file for the ioctl call
1560  *
1561  * Construct a CRTC configuration structure to return to the user.
1562  *
1563  * Called by the user via ioctl.
1564  *
1565  * RETURNS:
1566  * Zero on success, errno on failure.
1567  */
1568 int drm_mode_getcrtc(struct drm_device *dev,
1569                      void *data, struct drm_file *file_priv)
1570 {
1571         struct drm_mode_crtc *crtc_resp = data;
1572         struct drm_crtc *crtc;
1573         struct drm_mode_object *obj;
1574         int ret = 0;
1575
1576         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1577                 return -EINVAL;
1578
1579         drm_modeset_lock_all(dev);
1580
1581         obj = drm_mode_object_find(dev, crtc_resp->crtc_id,
1582                                    DRM_MODE_OBJECT_CRTC);
1583         if (!obj) {
1584                 ret = -ENOENT;
1585                 goto out;
1586         }
1587         crtc = obj_to_crtc(obj);
1588
1589         crtc_resp->x = crtc->x;
1590         crtc_resp->y = crtc->y;
1591         crtc_resp->gamma_size = crtc->gamma_size;
1592         if (crtc->fb)
1593                 crtc_resp->fb_id = crtc->fb->base.id;
1594         else
1595                 crtc_resp->fb_id = 0;
1596
1597         if (crtc->enabled) {
1598
1599                 drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->mode);
1600                 crtc_resp->mode_valid = 1;
1601
1602         } else {
1603                 crtc_resp->mode_valid = 0;
1604         }
1605
1606 out:
1607         drm_modeset_unlock_all(dev);
1608         return ret;
1609 }
1610
1611 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
1612                                          const struct drm_file *file_priv)
1613 {
1614         /*
1615          * If user-space hasn't configured the driver to expose the stereo 3D
1616          * modes, don't expose them.
1617          */
1618         if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
1619                 return false;
1620
1621         return true;
1622 }
1623
1624 /**
1625  * drm_mode_getconnector - get connector configuration
1626  * @dev: drm device for the ioctl
1627  * @data: data pointer for the ioctl
1628  * @file_priv: drm file for the ioctl call
1629  *
1630  * Construct a connector configuration structure to return to the user.
1631  *
1632  * Called by the user via ioctl.
1633  *
1634  * RETURNS:
1635  * Zero on success, errno on failure.
1636  */
1637 int drm_mode_getconnector(struct drm_device *dev, void *data,
1638                           struct drm_file *file_priv)
1639 {
1640         struct drm_mode_get_connector *out_resp = data;
1641         struct drm_mode_object *obj;
1642         struct drm_connector *connector;
1643         struct drm_display_mode *mode;
1644         int mode_count = 0;
1645         int props_count = 0;
1646         int encoders_count = 0;
1647         int ret = 0;
1648         int copied = 0;
1649         int i;
1650         struct drm_mode_modeinfo u_mode;
1651         struct drm_mode_modeinfo __user *mode_ptr;
1652         uint32_t __user *prop_ptr;
1653         uint64_t __user *prop_values;
1654         uint32_t __user *encoder_ptr;
1655
1656         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1657                 return -EINVAL;
1658
1659         memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
1660
1661         DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
1662
1663         mutex_lock(&dev->mode_config.mutex);
1664
1665         obj = drm_mode_object_find(dev, out_resp->connector_id,
1666                                    DRM_MODE_OBJECT_CONNECTOR);
1667         if (!obj) {
1668                 ret = -ENOENT;
1669                 goto out;
1670         }
1671         connector = obj_to_connector(obj);
1672
1673         props_count = connector->properties.count;
1674
1675         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1676                 if (connector->encoder_ids[i] != 0) {
1677                         encoders_count++;
1678                 }
1679         }
1680
1681         if (out_resp->count_modes == 0) {
1682                 connector->funcs->fill_modes(connector,
1683                                              dev->mode_config.max_width,
1684                                              dev->mode_config.max_height);
1685         }
1686
1687         /* delayed so we get modes regardless of pre-fill_modes state */
1688         list_for_each_entry(mode, &connector->modes, head)
1689                 if (drm_mode_expose_to_userspace(mode, file_priv))
1690                         mode_count++;
1691
1692         out_resp->connector_id = connector->base.id;
1693         out_resp->connector_type = connector->connector_type;
1694         out_resp->connector_type_id = connector->connector_type_id;
1695         out_resp->mm_width = connector->display_info.width_mm;
1696         out_resp->mm_height = connector->display_info.height_mm;
1697         out_resp->subpixel = connector->display_info.subpixel_order;
1698         out_resp->connection = connector->status;
1699         if (connector->encoder)
1700                 out_resp->encoder_id = connector->encoder->base.id;
1701         else
1702                 out_resp->encoder_id = 0;
1703
1704         /*
1705          * This ioctl is called twice, once to determine how much space is
1706          * needed, and the 2nd time to fill it.
1707          */
1708         if ((out_resp->count_modes >= mode_count) && mode_count) {
1709                 copied = 0;
1710                 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
1711                 list_for_each_entry(mode, &connector->modes, head) {
1712                         if (!drm_mode_expose_to_userspace(mode, file_priv))
1713                                 continue;
1714
1715                         drm_crtc_convert_to_umode(&u_mode, mode);
1716                         if (copy_to_user(mode_ptr + copied,
1717                                          &u_mode, sizeof(u_mode))) {
1718                                 ret = -EFAULT;
1719                                 goto out;
1720                         }
1721                         copied++;
1722                 }
1723         }
1724         out_resp->count_modes = mode_count;
1725
1726         if ((out_resp->count_props >= props_count) && props_count) {
1727                 copied = 0;
1728                 prop_ptr = (uint32_t __user *)(unsigned long)(out_resp->props_ptr);
1729                 prop_values = (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr);
1730                 for (i = 0; i < connector->properties.count; i++) {
1731                         if (put_user(connector->properties.ids[i],
1732                                      prop_ptr + copied)) {
1733                                 ret = -EFAULT;
1734                                 goto out;
1735                         }
1736
1737                         if (put_user(connector->properties.values[i],
1738                                      prop_values + copied)) {
1739                                 ret = -EFAULT;
1740                                 goto out;
1741                         }
1742                         copied++;
1743                 }
1744         }
1745         out_resp->count_props = props_count;
1746
1747         if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
1748                 copied = 0;
1749                 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
1750                 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
1751                         if (connector->encoder_ids[i] != 0) {
1752                                 if (put_user(connector->encoder_ids[i],
1753                                              encoder_ptr + copied)) {
1754                                         ret = -EFAULT;
1755                                         goto out;
1756                                 }
1757                                 copied++;
1758                         }
1759                 }
1760         }
1761         out_resp->count_encoders = encoders_count;
1762
1763 out:
1764         mutex_unlock(&dev->mode_config.mutex);
1765
1766         return ret;
1767 }
1768
1769 int drm_mode_getencoder(struct drm_device *dev, void *data,
1770                         struct drm_file *file_priv)
1771 {
1772         struct drm_mode_get_encoder *enc_resp = data;
1773         struct drm_mode_object *obj;
1774         struct drm_encoder *encoder;
1775         int ret = 0;
1776
1777         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1778                 return -EINVAL;
1779
1780         drm_modeset_lock_all(dev);
1781         obj = drm_mode_object_find(dev, enc_resp->encoder_id,
1782                                    DRM_MODE_OBJECT_ENCODER);
1783         if (!obj) {
1784                 ret = -ENOENT;
1785                 goto out;
1786         }
1787         encoder = obj_to_encoder(obj);
1788
1789         if (encoder->crtc)
1790                 enc_resp->crtc_id = encoder->crtc->base.id;
1791         else
1792                 enc_resp->crtc_id = 0;
1793         enc_resp->encoder_type = encoder->encoder_type;
1794         enc_resp->encoder_id = encoder->base.id;
1795         enc_resp->possible_crtcs = encoder->possible_crtcs;
1796         enc_resp->possible_clones = encoder->possible_clones;
1797
1798 out:
1799         drm_modeset_unlock_all(dev);
1800         return ret;
1801 }
1802
1803 /**
1804  * drm_mode_getplane_res - get plane info
1805  * @dev: DRM device
1806  * @data: ioctl data
1807  * @file_priv: DRM file info
1808  *
1809  * Return an plane count and set of IDs.
1810  */
1811 int drm_mode_getplane_res(struct drm_device *dev, void *data,
1812                             struct drm_file *file_priv)
1813 {
1814         struct drm_mode_get_plane_res *plane_resp = data;
1815         struct drm_mode_config *config;
1816         struct drm_plane *plane;
1817         uint32_t __user *plane_ptr;
1818         int copied = 0, ret = 0;
1819
1820         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1821                 return -EINVAL;
1822
1823         drm_modeset_lock_all(dev);
1824         config = &dev->mode_config;
1825
1826         /*
1827          * This ioctl is called twice, once to determine how much space is
1828          * needed, and the 2nd time to fill it.
1829          */
1830         if (config->num_plane &&
1831             (plane_resp->count_planes >= config->num_plane)) {
1832                 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr;
1833
1834                 list_for_each_entry(plane, &config->plane_list, head) {
1835                         if (put_user(plane->base.id, plane_ptr + copied)) {
1836                                 ret = -EFAULT;
1837                                 goto out;
1838                         }
1839                         copied++;
1840                 }
1841         }
1842         plane_resp->count_planes = config->num_plane;
1843
1844 out:
1845         drm_modeset_unlock_all(dev);
1846         return ret;
1847 }
1848
1849 /**
1850  * drm_mode_getplane - get plane info
1851  * @dev: DRM device
1852  * @data: ioctl data
1853  * @file_priv: DRM file info
1854  *
1855  * Return plane info, including formats supported, gamma size, any
1856  * current fb, etc.
1857  */
1858 int drm_mode_getplane(struct drm_device *dev, void *data,
1859                         struct drm_file *file_priv)
1860 {
1861         struct drm_mode_get_plane *plane_resp = data;
1862         struct drm_mode_object *obj;
1863         struct drm_plane *plane;
1864         uint32_t __user *format_ptr;
1865         int ret = 0;
1866
1867         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1868                 return -EINVAL;
1869
1870         drm_modeset_lock_all(dev);
1871         obj = drm_mode_object_find(dev, plane_resp->plane_id,
1872                                    DRM_MODE_OBJECT_PLANE);
1873         if (!obj) {
1874                 ret = -ENOENT;
1875                 goto out;
1876         }
1877         plane = obj_to_plane(obj);
1878
1879         if (plane->crtc)
1880                 plane_resp->crtc_id = plane->crtc->base.id;
1881         else
1882                 plane_resp->crtc_id = 0;
1883
1884         if (plane->fb)
1885                 plane_resp->fb_id = plane->fb->base.id;
1886         else
1887                 plane_resp->fb_id = 0;
1888
1889         plane_resp->plane_id = plane->base.id;
1890         plane_resp->possible_crtcs = plane->possible_crtcs;
1891         plane_resp->gamma_size = 0;
1892
1893         /*
1894          * This ioctl is called twice, once to determine how much space is
1895          * needed, and the 2nd time to fill it.
1896          */
1897         if (plane->format_count &&
1898             (plane_resp->count_format_types >= plane->format_count)) {
1899                 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
1900                 if (copy_to_user(format_ptr,
1901                                  plane->format_types,
1902                                  sizeof(uint32_t) * plane->format_count)) {
1903                         ret = -EFAULT;
1904                         goto out;
1905                 }
1906         }
1907         plane_resp->count_format_types = plane->format_count;
1908
1909 out:
1910         drm_modeset_unlock_all(dev);
1911         return ret;
1912 }
1913
1914 /**
1915  * drm_mode_setplane - set up or tear down an plane
1916  * @dev: DRM device
1917  * @data: ioctl data*
1918  * @file_priv: DRM file info
1919  *
1920  * Set plane info, including placement, fb, scaling, and other factors.
1921  * Or pass a NULL fb to disable.
1922  */
1923 int drm_mode_setplane(struct drm_device *dev, void *data,
1924                         struct drm_file *file_priv)
1925 {
1926         struct drm_mode_set_plane *plane_req = data;
1927         struct drm_mode_object *obj;
1928         struct drm_plane *plane;
1929         struct drm_crtc *crtc;
1930         struct drm_framebuffer *fb = NULL, *old_fb = NULL;
1931         int ret = 0;
1932         unsigned int fb_width, fb_height;
1933         int i;
1934
1935         if (!drm_core_check_feature(dev, DRIVER_MODESET))
1936                 return -EINVAL;
1937
1938         /*
1939          * First, find the plane, crtc, and fb objects.  If not available,
1940          * we don't bother to call the driver.
1941          */
1942         obj = drm_mode_object_find(dev, plane_req->plane_id,
1943                                    DRM_MODE_OBJECT_PLANE);
1944         if (!obj) {
1945                 DRM_DEBUG_KMS("Unknown plane ID %d\n",
1946                               plane_req->plane_id);
1947                 return -ENOENT;
1948         }
1949         plane = obj_to_plane(obj);
1950
1951         /* No fb means shut it down */
1952         if (!plane_req->fb_id) {
1953                 drm_modeset_lock_all(dev);
1954                 old_fb = plane->fb;
1955                 plane->funcs->disable_plane(plane);
1956                 plane->crtc = NULL;
1957                 plane->fb = NULL;
1958                 drm_modeset_unlock_all(dev);
1959                 goto out;
1960         }
1961
1962         obj = drm_mode_object_find(dev, plane_req->crtc_id,
1963                                    DRM_MODE_OBJECT_CRTC);
1964         if (!obj) {
1965                 DRM_DEBUG_KMS("Unknown crtc ID %d\n",
1966                               plane_req->crtc_id);
1967                 ret = -ENOENT;
1968                 goto out;
1969         }
1970         crtc = obj_to_crtc(obj);
1971
1972         fb = drm_framebuffer_lookup(dev, plane_req->fb_id);
1973         if (!fb) {
1974                 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
1975                               plane_req->fb_id);
1976                 ret = -ENOENT;
1977                 goto out;
1978         }
1979
1980         /* Check whether this plane supports the fb pixel format. */
1981         for (i = 0; i < plane->format_count; i++)
1982                 if (fb->pixel_format == plane->format_types[i])
1983                         break;
1984         if (i == plane->format_count) {
1985                 DRM_DEBUG_KMS("Invalid pixel format %s\n",
1986                               drm_get_format_name(fb->pixel_format));
1987                 ret = -EINVAL;
1988                 goto out;
1989         }
1990
1991         fb_width = fb->width << 16;
1992         fb_height = fb->height << 16;
1993
1994         /* Make sure source coordinates are inside the fb. */
1995         if (plane_req->src_w > fb_width ||
1996             plane_req->src_x > fb_width - plane_req->src_w ||
1997             plane_req->src_h > fb_height ||
1998             plane_req->src_y > fb_height - plane_req->src_h) {
1999                 DRM_DEBUG_KMS("Invalid source coordinates "
2000                               "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
2001                               plane_req->src_w >> 16,
2002                               ((plane_req->src_w & 0xffff) * 15625) >> 10,
2003                               plane_req->src_h >> 16,
2004                               ((plane_req->src_h & 0xffff) * 15625) >> 10,
2005                               plane_req->src_x >> 16,
2006                               ((plane_req->src_x & 0xffff) * 15625) >> 10,
2007                               plane_req->src_y >> 16,
2008                               ((plane_req->src_y & 0xffff) * 15625) >> 10);
2009                 ret = -ENOSPC;
2010                 goto out;
2011         }
2012
2013         /* Give drivers some help against integer overflows */
2014         if (plane_req->crtc_w > INT_MAX ||
2015             plane_req->crtc_x > INT_MAX - (int32_t) plane_req->crtc_w ||
2016             plane_req->crtc_h > INT_MAX ||
2017             plane_req->crtc_y > INT_MAX - (int32_t) plane_req->crtc_h) {
2018                 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
2019                               plane_req->crtc_w, plane_req->crtc_h,
2020                               plane_req->crtc_x, plane_req->crtc_y);
2021                 ret = -ERANGE;
2022                 goto out;
2023         }
2024
2025         drm_modeset_lock_all(dev);
2026         ret = plane->funcs->update_plane(plane, crtc, fb,
2027                                          plane_req->crtc_x, plane_req->crtc_y,
2028                                          plane_req->crtc_w, plane_req->crtc_h,
2029                                          plane_req->src_x, plane_req->src_y,
2030                                          plane_req->src_w, plane_req->src_h);
2031         if (!ret) {
2032                 old_fb = plane->fb;
2033                 plane->crtc = crtc;
2034                 plane->fb = fb;
2035                 fb = NULL;
2036         }
2037         drm_modeset_unlock_all(dev);
2038
2039 out:
2040         if (fb)
2041                 drm_framebuffer_unreference(fb);
2042         if (old_fb)
2043                 drm_framebuffer_unreference(old_fb);
2044
2045         return ret;
2046 }
2047
2048 /**
2049  * drm_mode_set_config_internal - helper to call ->set_config
2050  * @set: modeset config to set
2051  *
2052  * This is a little helper to wrap internal calls to the ->set_config driver
2053  * interface. The only thing it adds is correct refcounting dance.
2054  */
2055 int drm_mode_set_config_internal(struct drm_mode_set *set)
2056 {
2057         struct drm_crtc *crtc = set->crtc;
2058         struct drm_framebuffer *fb;
2059         struct drm_crtc *tmp;
2060         int ret;
2061
2062         /*
2063          * NOTE: ->set_config can also disable other crtcs (if we steal all
2064          * connectors from it), hence we need to refcount the fbs across all
2065          * crtcs. Atomic modeset will have saner semantics ...
2066          */
2067         list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head)
2068                 tmp->old_fb = tmp->fb;
2069
2070         fb = set->fb;
2071
2072         ret = crtc->funcs->set_config(set);
2073         if (ret == 0) {
2074                 /* crtc->fb must be updated by ->set_config, enforces this. */
2075                 WARN_ON(fb != crtc->fb);
2076         }
2077
2078         list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) {
2079                 if (tmp->fb)
2080                         drm_framebuffer_reference(tmp->fb);
2081                 if (tmp->old_fb)
2082                         drm_framebuffer_unreference(tmp->old_fb);
2083         }
2084
2085         return ret;
2086 }
2087 EXPORT_SYMBOL(drm_mode_set_config_internal);
2088
2089 /*
2090  * Checks that the framebuffer is big enough for the CRTC viewport
2091  * (x, y, hdisplay, vdisplay)
2092  */
2093 static int drm_crtc_check_viewport(const struct drm_crtc *crtc,
2094                                    int x, int y,
2095                                    const struct drm_display_mode *mode,
2096                                    const struct drm_framebuffer *fb)
2097
2098 {
2099         int hdisplay, vdisplay;
2100
2101         hdisplay = mode->hdisplay;
2102         vdisplay = mode->vdisplay;
2103
2104         if (drm_mode_is_stereo(mode)) {
2105                 struct drm_display_mode adjusted = *mode;
2106
2107                 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE);
2108                 hdisplay = adjusted.crtc_hdisplay;
2109                 vdisplay = adjusted.crtc_vdisplay;
2110         }
2111
2112         if (crtc->invert_dimensions)
2113                 swap(hdisplay, vdisplay);
2114
2115         if (hdisplay > fb->width ||
2116             vdisplay > fb->height ||
2117             x > fb->width - hdisplay ||
2118             y > fb->height - vdisplay) {
2119                 DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n",
2120                               fb->width, fb->height, hdisplay, vdisplay, x, y,
2121                               crtc->invert_dimensions ? " (inverted)" : "");
2122                 return -ENOSPC;
2123         }
2124
2125         return 0;
2126 }
2127
2128 /**
2129  * drm_mode_setcrtc - set CRTC configuration
2130  * @dev: drm device for the ioctl
2131  * @data: data pointer for the ioctl
2132  * @file_priv: drm file for the ioctl call
2133  *
2134  * Build a new CRTC configuration based on user request.
2135  *
2136  * Called by the user via ioctl.
2137  *
2138  * RETURNS:
2139  * Zero on success, errno on failure.
2140  */
2141 int drm_mode_setcrtc(struct drm_device *dev, void *data,
2142                      struct drm_file *file_priv)
2143 {
2144         struct drm_mode_config *config = &dev->mode_config;
2145         struct drm_mode_crtc *crtc_req = data;
2146         struct drm_mode_object *obj;
2147         struct drm_crtc *crtc;
2148         struct drm_connector **connector_set = NULL, *connector;
2149         struct drm_framebuffer *fb = NULL;
2150         struct drm_display_mode *mode = NULL;
2151         struct drm_mode_set set;
2152         uint32_t __user *set_connectors_ptr;
2153         int ret;
2154         int i;
2155
2156         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2157                 return -EINVAL;
2158
2159         /* For some reason crtc x/y offsets are signed internally. */
2160         if (crtc_req->x > INT_MAX || crtc_req->y > INT_MAX)
2161                 return -ERANGE;
2162
2163         drm_modeset_lock_all(dev);
2164         obj = drm_mode_object_find(dev, crtc_req->crtc_id,
2165                                    DRM_MODE_OBJECT_CRTC);
2166         if (!obj) {
2167                 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
2168                 ret = -ENOENT;
2169                 goto out;
2170         }
2171         crtc = obj_to_crtc(obj);
2172         DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
2173
2174         if (crtc_req->mode_valid) {
2175                 /* If we have a mode we need a framebuffer. */
2176                 /* If we pass -1, set the mode with the currently bound fb */
2177                 if (crtc_req->fb_id == -1) {
2178                         if (!crtc->fb) {
2179                                 DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
2180                                 ret = -EINVAL;
2181                                 goto out;
2182                         }
2183                         fb = crtc->fb;
2184                         /* Make refcounting symmetric with the lookup path. */
2185                         drm_framebuffer_reference(fb);
2186                 } else {
2187                         fb = drm_framebuffer_lookup(dev, crtc_req->fb_id);
2188                         if (!fb) {
2189                                 DRM_DEBUG_KMS("Unknown FB ID%d\n",
2190                                                 crtc_req->fb_id);
2191                                 ret = -ENOENT;
2192                                 goto out;
2193                         }
2194                 }
2195
2196                 mode = drm_mode_create(dev);
2197                 if (!mode) {
2198                         ret = -ENOMEM;
2199                         goto out;
2200                 }
2201
2202                 ret = drm_crtc_convert_umode(mode, &crtc_req->mode);
2203                 if (ret) {
2204                         DRM_DEBUG_KMS("Invalid mode\n");
2205                         goto out;
2206                 }
2207
2208                 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
2209
2210                 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
2211                                               mode, fb);
2212                 if (ret)
2213                         goto out;
2214
2215         }
2216
2217         if (crtc_req->count_connectors == 0 && mode) {
2218                 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
2219                 ret = -EINVAL;
2220                 goto out;
2221         }
2222
2223         if (crtc_req->count_connectors > 0 && (!mode || !fb)) {
2224                 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
2225                           crtc_req->count_connectors);
2226                 ret = -EINVAL;
2227                 goto out;
2228         }
2229
2230         if (crtc_req->count_connectors > 0) {
2231                 u32 out_id;
2232
2233                 /* Avoid unbounded kernel memory allocation */
2234                 if (crtc_req->count_connectors > config->num_connector) {
2235                         ret = -EINVAL;
2236                         goto out;
2237                 }
2238
2239                 connector_set = kmalloc(crtc_req->count_connectors *
2240                                         sizeof(struct drm_connector *),
2241                                         GFP_KERNEL);
2242                 if (!connector_set) {
2243                         ret = -ENOMEM;
2244                         goto out;
2245                 }
2246
2247                 for (i = 0; i < crtc_req->count_connectors; i++) {
2248                         set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
2249                         if (get_user(out_id, &set_connectors_ptr[i])) {
2250                                 ret = -EFAULT;
2251                                 goto out;
2252                         }
2253
2254                         obj = drm_mode_object_find(dev, out_id,
2255                                                    DRM_MODE_OBJECT_CONNECTOR);
2256                         if (!obj) {
2257                                 DRM_DEBUG_KMS("Connector id %d unknown\n",
2258                                                 out_id);
2259                                 ret = -ENOENT;
2260                                 goto out;
2261                         }
2262                         connector = obj_to_connector(obj);
2263                         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
2264                                         connector->base.id,
2265                                         drm_get_connector_name(connector));
2266
2267                         connector_set[i] = connector;
2268                 }
2269         }
2270
2271         set.crtc = crtc;
2272         set.x = crtc_req->x;
2273         set.y = crtc_req->y;
2274         set.mode = mode;
2275         set.connectors = connector_set;
2276         set.num_connectors = crtc_req->count_connectors;
2277         set.fb = fb;
2278         ret = drm_mode_set_config_internal(&set);
2279
2280 out:
2281         if (fb)
2282                 drm_framebuffer_unreference(fb);
2283
2284         kfree(connector_set);
2285         drm_mode_destroy(dev, mode);
2286         drm_modeset_unlock_all(dev);
2287         return ret;
2288 }
2289
2290 static int drm_mode_cursor_common(struct drm_device *dev,
2291                                   struct drm_mode_cursor2 *req,
2292                                   struct drm_file *file_priv)
2293 {
2294         struct drm_mode_object *obj;
2295         struct drm_crtc *crtc;
2296         int ret = 0;
2297
2298         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2299                 return -EINVAL;
2300
2301         if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags))
2302                 return -EINVAL;
2303
2304         obj = drm_mode_object_find(dev, req->crtc_id, DRM_MODE_OBJECT_CRTC);
2305         if (!obj) {
2306                 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
2307                 return -ENOENT;
2308         }
2309         crtc = obj_to_crtc(obj);
2310
2311         mutex_lock(&crtc->mutex);
2312         if (req->flags & DRM_MODE_CURSOR_BO) {
2313                 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
2314                         ret = -ENXIO;
2315                         goto out;
2316                 }
2317                 /* Turns off the cursor if handle is 0 */
2318                 if (crtc->funcs->cursor_set2)
2319                         ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
2320                                                       req->width, req->height, req->hot_x, req->hot_y);
2321                 else
2322                         ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
2323                                                       req->width, req->height);
2324         }
2325
2326         if (req->flags & DRM_MODE_CURSOR_MOVE) {
2327                 if (crtc->funcs->cursor_move) {
2328                         ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
2329                 } else {
2330                         ret = -EFAULT;
2331                         goto out;
2332                 }
2333         }
2334 out:
2335         mutex_unlock(&crtc->mutex);
2336
2337         return ret;
2338
2339 }
2340 int drm_mode_cursor_ioctl(struct drm_device *dev,
2341                         void *data, struct drm_file *file_priv)
2342 {
2343         struct drm_mode_cursor *req = data;
2344         struct drm_mode_cursor2 new_req;
2345
2346         memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
2347         new_req.hot_x = new_req.hot_y = 0;
2348
2349         return drm_mode_cursor_common(dev, &new_req, file_priv);
2350 }
2351
2352 int drm_mode_cursor2_ioctl(struct drm_device *dev,
2353                            void *data, struct drm_file *file_priv)
2354 {
2355         struct drm_mode_cursor2 *req = data;
2356         return drm_mode_cursor_common(dev, req, file_priv);
2357 }
2358
2359 /* Original addfb only supported RGB formats, so figure out which one */
2360 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
2361 {
2362         uint32_t fmt;
2363
2364         switch (bpp) {
2365         case 8:
2366                 fmt = DRM_FORMAT_C8;
2367                 break;
2368         case 16:
2369                 if (depth == 15)
2370                         fmt = DRM_FORMAT_XRGB1555;
2371                 else
2372                         fmt = DRM_FORMAT_RGB565;
2373                 break;
2374         case 24:
2375                 fmt = DRM_FORMAT_RGB888;
2376                 break;
2377         case 32:
2378                 if (depth == 24)
2379                         fmt = DRM_FORMAT_XRGB8888;
2380                 else if (depth == 30)
2381                         fmt = DRM_FORMAT_XRGB2101010;
2382                 else
2383                         fmt = DRM_FORMAT_ARGB8888;
2384                 break;
2385         default:
2386                 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n");
2387                 fmt = DRM_FORMAT_XRGB8888;
2388                 break;
2389         }
2390
2391         return fmt;
2392 }
2393 EXPORT_SYMBOL(drm_mode_legacy_fb_format);
2394
2395 /**
2396  * drm_mode_addfb - add an FB to the graphics configuration
2397  * @dev: drm device for the ioctl
2398  * @data: data pointer for the ioctl
2399  * @file_priv: drm file for the ioctl call
2400  *
2401  * Add a new FB to the specified CRTC, given a user request.
2402  *
2403  * Called by the user via ioctl.
2404  *
2405  * RETURNS:
2406  * Zero on success, errno on failure.
2407  */
2408 int drm_mode_addfb(struct drm_device *dev,
2409                    void *data, struct drm_file *file_priv)
2410 {
2411         struct drm_mode_fb_cmd *or = data;
2412         struct drm_mode_fb_cmd2 r = {};
2413         struct drm_mode_config *config = &dev->mode_config;
2414         struct drm_framebuffer *fb;
2415         int ret = 0;
2416
2417         /* Use new struct with format internally */
2418         r.fb_id = or->fb_id;
2419         r.width = or->width;
2420         r.height = or->height;
2421         r.pitches[0] = or->pitch;
2422         r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth);
2423         r.handles[0] = or->handle;
2424
2425         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2426                 return -EINVAL;
2427
2428         if ((config->min_width > r.width) || (r.width > config->max_width))
2429                 return -EINVAL;
2430
2431         if ((config->min_height > r.height) || (r.height > config->max_height))
2432                 return -EINVAL;
2433
2434         fb = dev->mode_config.funcs->fb_create(dev, file_priv, &r);
2435         if (IS_ERR(fb)) {
2436                 DRM_DEBUG_KMS("could not create framebuffer\n");
2437                 return PTR_ERR(fb);
2438         }
2439
2440         mutex_lock(&file_priv->fbs_lock);
2441         or->fb_id = fb->base.id;
2442         list_add(&fb->filp_head, &file_priv->fbs);
2443         DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
2444         mutex_unlock(&file_priv->fbs_lock);
2445
2446         return ret;
2447 }
2448
2449 static int format_check(const struct drm_mode_fb_cmd2 *r)
2450 {
2451         uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN;
2452
2453         switch (format) {
2454         case DRM_FORMAT_C8:
2455         case DRM_FORMAT_RGB332:
2456         case DRM_FORMAT_BGR233:
2457         case DRM_FORMAT_XRGB4444:
2458         case DRM_FORMAT_XBGR4444:
2459         case DRM_FORMAT_RGBX4444:
2460         case DRM_FORMAT_BGRX4444:
2461         case DRM_FORMAT_ARGB4444:
2462         case DRM_FORMAT_ABGR4444:
2463         case DRM_FORMAT_RGBA4444:
2464         case DRM_FORMAT_BGRA4444:
2465         case DRM_FORMAT_XRGB1555:
2466         case DRM_FORMAT_XBGR1555:
2467         case DRM_FORMAT_RGBX5551:
2468         case DRM_FORMAT_BGRX5551:
2469         case DRM_FORMAT_ARGB1555:
2470         case DRM_FORMAT_ABGR1555:
2471         case DRM_FORMAT_RGBA5551:
2472         case DRM_FORMAT_BGRA5551:
2473         case DRM_FORMAT_RGB565:
2474         case DRM_FORMAT_BGR565:
2475         case DRM_FORMAT_RGB888:
2476         case DRM_FORMAT_BGR888:
2477         case DRM_FORMAT_XRGB8888:
2478         case DRM_FORMAT_XBGR8888:
2479         case DRM_FORMAT_RGBX8888:
2480         case DRM_FORMAT_BGRX8888:
2481         case DRM_FORMAT_ARGB8888:
2482         case DRM_FORMAT_ABGR8888:
2483         case DRM_FORMAT_RGBA8888:
2484         case DRM_FORMAT_BGRA8888:
2485         case DRM_FORMAT_XRGB2101010:
2486         case DRM_FORMAT_XBGR2101010:
2487         case DRM_FORMAT_RGBX1010102:
2488         case DRM_FORMAT_BGRX1010102:
2489         case DRM_FORMAT_ARGB2101010:
2490         case DRM_FORMAT_ABGR2101010:
2491         case DRM_FORMAT_RGBA1010102:
2492         case DRM_FORMAT_BGRA1010102:
2493         case DRM_FORMAT_YUYV:
2494         case DRM_FORMAT_YVYU:
2495         case DRM_FORMAT_UYVY:
2496         case DRM_FORMAT_VYUY:
2497         case DRM_FORMAT_AYUV:
2498         case DRM_FORMAT_NV12:
2499         case DRM_FORMAT_NV21:
2500         case DRM_FORMAT_NV16:
2501         case DRM_FORMAT_NV61:
2502         case DRM_FORMAT_NV24:
2503         case DRM_FORMAT_NV42:
2504         case DRM_FORMAT_YUV410:
2505         case DRM_FORMAT_YVU410:
2506         case DRM_FORMAT_YUV411:
2507         case DRM_FORMAT_YVU411:
2508         case DRM_FORMAT_YUV420:
2509         case DRM_FORMAT_YVU420:
2510         case DRM_FORMAT_YUV422:
2511         case DRM_FORMAT_YVU422:
2512         case DRM_FORMAT_YUV444:
2513         case DRM_FORMAT_YVU444:
2514                 return 0;
2515         default:
2516                 DRM_DEBUG_KMS("invalid pixel format %s\n",
2517                               drm_get_format_name(r->pixel_format));
2518                 return -EINVAL;
2519         }
2520 }
2521
2522 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
2523 {
2524         int ret, hsub, vsub, num_planes, i;
2525
2526         ret = format_check(r);
2527         if (ret) {
2528                 DRM_DEBUG_KMS("bad framebuffer format %s\n",
2529                               drm_get_format_name(r->pixel_format));
2530                 return ret;
2531         }
2532
2533         hsub = drm_format_horz_chroma_subsampling(r->pixel_format);
2534         vsub = drm_format_vert_chroma_subsampling(r->pixel_format);
2535         num_planes = drm_format_num_planes(r->pixel_format);
2536
2537         if (r->width == 0 || r->width % hsub) {
2538                 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->height);
2539                 return -EINVAL;
2540         }
2541
2542         if (r->height == 0 || r->height % vsub) {
2543                 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height);
2544                 return -EINVAL;
2545         }
2546
2547         for (i = 0; i < num_planes; i++) {
2548                 unsigned int width = r->width / (i != 0 ? hsub : 1);
2549                 unsigned int height = r->height / (i != 0 ? vsub : 1);
2550                 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i);
2551
2552                 if (!r->handles[i]) {
2553                         DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i);
2554                         return -EINVAL;
2555                 }
2556
2557                 if ((uint64_t) width * cpp > UINT_MAX)
2558                         return -ERANGE;
2559
2560                 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX)
2561                         return -ERANGE;
2562
2563                 if (r->pitches[i] < width * cpp) {
2564                         DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i);
2565                         return -EINVAL;
2566                 }
2567         }
2568
2569         return 0;
2570 }
2571
2572 /**
2573  * drm_mode_addfb2 - add an FB to the graphics configuration
2574  * @dev: drm device for the ioctl
2575  * @data: data pointer for the ioctl
2576  * @file_priv: drm file for the ioctl call
2577  *
2578  * Add a new FB to the specified CRTC, given a user request with format.
2579  *
2580  * Called by the user via ioctl.
2581  *
2582  * RETURNS:
2583  * Zero on success, errno on failure.
2584  */
2585 int drm_mode_addfb2(struct drm_device *dev,
2586                     void *data, struct drm_file *file_priv)
2587 {
2588         struct drm_mode_fb_cmd2 *r = data;
2589         struct drm_mode_config *config = &dev->mode_config;
2590         struct drm_framebuffer *fb;
2591         int ret;
2592
2593         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2594                 return -EINVAL;
2595
2596         if (r->flags & ~DRM_MODE_FB_INTERLACED) {
2597                 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags);
2598                 return -EINVAL;
2599         }
2600
2601         if ((config->min_width > r->width) || (r->width > config->max_width)) {
2602                 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n",
2603                           r->width, config->min_width, config->max_width);
2604                 return -EINVAL;
2605         }
2606         if ((config->min_height > r->height) || (r->height > config->max_height)) {
2607                 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n",
2608                           r->height, config->min_height, config->max_height);
2609                 return -EINVAL;
2610         }
2611
2612         ret = framebuffer_check(r);
2613         if (ret)
2614                 return ret;
2615
2616         fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
2617         if (IS_ERR(fb)) {
2618                 DRM_DEBUG_KMS("could not create framebuffer\n");
2619                 return PTR_ERR(fb);
2620         }
2621
2622         mutex_lock(&file_priv->fbs_lock);
2623         r->fb_id = fb->base.id;
2624         list_add(&fb->filp_head, &file_priv->fbs);
2625         DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
2626         mutex_unlock(&file_priv->fbs_lock);
2627
2628
2629         return ret;
2630 }
2631
2632 /**
2633  * drm_mode_rmfb - remove an FB from the configuration
2634  * @dev: drm device for the ioctl
2635  * @data: data pointer for the ioctl
2636  * @file_priv: drm file for the ioctl call
2637  *
2638  * Remove the FB specified by the user.
2639  *
2640  * Called by the user via ioctl.
2641  *
2642  * RETURNS:
2643  * Zero on success, errno on failure.
2644  */
2645 int drm_mode_rmfb(struct drm_device *dev,
2646                    void *data, struct drm_file *file_priv)
2647 {
2648         struct drm_framebuffer *fb = NULL;
2649         struct drm_framebuffer *fbl = NULL;
2650         uint32_t *id = data;
2651         int found = 0;
2652
2653         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2654                 return -EINVAL;
2655
2656         mutex_lock(&file_priv->fbs_lock);
2657         mutex_lock(&dev->mode_config.fb_lock);
2658         fb = __drm_framebuffer_lookup(dev, *id);
2659         if (!fb)
2660                 goto fail_lookup;
2661
2662         list_for_each_entry(fbl, &file_priv->fbs, filp_head)
2663                 if (fb == fbl)
2664                         found = 1;
2665         if (!found)
2666                 goto fail_lookup;
2667
2668         /* Mark fb as reaped, we still have a ref from fpriv->fbs. */
2669         __drm_framebuffer_unregister(dev, fb);
2670
2671         list_del_init(&fb->filp_head);
2672         mutex_unlock(&dev->mode_config.fb_lock);
2673         mutex_unlock(&file_priv->fbs_lock);
2674
2675         drm_framebuffer_remove(fb);
2676
2677         return 0;
2678
2679 fail_lookup:
2680         mutex_unlock(&dev->mode_config.fb_lock);
2681         mutex_unlock(&file_priv->fbs_lock);
2682
2683         return -ENOENT;
2684 }
2685
2686 /**
2687  * drm_mode_getfb - get FB info
2688  * @dev: drm device for the ioctl
2689  * @data: data pointer for the ioctl
2690  * @file_priv: drm file for the ioctl call
2691  *
2692  * Lookup the FB given its ID and return info about it.
2693  *
2694  * Called by the user via ioctl.
2695  *
2696  * RETURNS:
2697  * Zero on success, errno on failure.
2698  */
2699 int drm_mode_getfb(struct drm_device *dev,
2700                    void *data, struct drm_file *file_priv)
2701 {
2702         struct drm_mode_fb_cmd *r = data;
2703         struct drm_framebuffer *fb;
2704         int ret;
2705
2706         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2707                 return -EINVAL;
2708
2709         fb = drm_framebuffer_lookup(dev, r->fb_id);
2710         if (!fb)
2711                 return -ENOENT;
2712
2713         r->height = fb->height;
2714         r->width = fb->width;
2715         r->depth = fb->depth;
2716         r->bpp = fb->bits_per_pixel;
2717         r->pitch = fb->pitches[0];
2718         if (fb->funcs->create_handle) {
2719                 if (file_priv->is_master || capable(CAP_SYS_ADMIN) ||
2720                     file_priv->minor->type == DRM_MINOR_CONTROL) {
2721                         ret = fb->funcs->create_handle(fb, file_priv,
2722                                                        &r->handle);
2723                 } else {
2724                         /* GET_FB() is an unprivileged ioctl so we must not
2725                          * return a buffer-handle to non-master processes! For
2726                          * backwards-compatibility reasons, we cannot make
2727                          * GET_FB() privileged, so just return an invalid handle
2728                          * for non-masters. */
2729                         r->handle = 0;
2730                         ret = 0;
2731                 }
2732         } else {
2733                 ret = -ENODEV;
2734         }
2735
2736         drm_framebuffer_unreference(fb);
2737
2738         return ret;
2739 }
2740
2741 int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
2742                            void *data, struct drm_file *file_priv)
2743 {
2744         struct drm_clip_rect __user *clips_ptr;
2745         struct drm_clip_rect *clips = NULL;
2746         struct drm_mode_fb_dirty_cmd *r = data;
2747         struct drm_framebuffer *fb;
2748         unsigned flags;
2749         int num_clips;
2750         int ret;
2751
2752         if (!drm_core_check_feature(dev, DRIVER_MODESET))
2753                 return -EINVAL;
2754
2755         fb = drm_framebuffer_lookup(dev, r->fb_id);
2756         if (!fb)
2757                 return -ENOENT;
2758
2759         num_clips = r->num_clips;
2760         clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr;
2761
2762         if (!num_clips != !clips_ptr) {
2763                 ret = -EINVAL;
2764                 goto out_err1;
2765         }
2766
2767         flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags;
2768
2769         /* If userspace annotates copy, clips must come in pairs */
2770         if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) {
2771                 ret = -EINVAL;
2772                 goto out_err1;
2773         }
2774
2775         if (num_clips && clips_ptr) {
2776                 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) {
2777                         ret = -EINVAL;
2778                         goto out_err1;
2779                 }
2780                 clips = kzalloc(num_clips * sizeof(*clips), GFP_KERNEL);
2781                 if (!clips) {
2782                         ret = -ENOMEM;
2783                         goto out_err1;
2784                 }
2785
2786                 ret = copy_from_user(clips, clips_ptr,
2787                                      num_clips * sizeof(*clips));
2788                 if (ret) {
2789                         ret = -EFAULT;
2790                         goto out_err2;
2791                 }
2792         }
2793
2794         if (fb->funcs->dirty) {
2795                 ret = fb->funcs->dirty(fb, file_priv, flags, r->color,
2796                                        clips, num_clips);
2797         } else {
2798                 ret = -ENOSYS;
2799         }
2800
2801 out_err2:
2802         kfree(clips);
2803 out_err1:
2804         drm_framebuffer_unreference(fb);
2805
2806         return ret;
2807 }
2808
2809
2810 /**
2811  * drm_fb_release - remove and free the FBs on this file
2812  * @priv: drm file for the ioctl
2813  *
2814  * Destroy all the FBs associated with @filp.
2815  *
2816  * Called by the user via ioctl.
2817  *
2818  * RETURNS:
2819  * Zero on success, errno on failure.
2820  */
2821 void drm_fb_release(struct drm_file *priv)
2822 {
2823         struct drm_device *dev = priv->minor->dev;
2824         struct drm_framebuffer *fb, *tfb;
2825
2826         mutex_lock(&priv->fbs_lock);
2827         list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
2828
2829                 mutex_lock(&dev->mode_config.fb_lock);
2830                 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */
2831                 __drm_framebuffer_unregister(dev, fb);
2832                 mutex_unlock(&dev->mode_config.fb_lock);
2833
2834                 list_del_init(&fb->filp_head);
2835
2836                 /* This will also drop the fpriv->fbs reference. */
2837                 drm_framebuffer_remove(fb);
2838         }
2839         mutex_unlock(&priv->fbs_lock);
2840 }
2841
2842 struct drm_property *drm_property_create(struct drm_device *dev, int flags,
2843                                          const char *name, int num_values)
2844 {
2845         struct drm_property *property = NULL;
2846         int ret;
2847
2848         property = kzalloc(sizeof(struct drm_property), GFP_KERNEL);
2849         if (!property)
2850                 return NULL;
2851
2852         if (num_values) {
2853                 property->values = kzalloc(sizeof(uint64_t)*num_values, GFP_KERNEL);
2854                 if (!property->values)
2855                         goto fail;
2856         }
2857
2858         ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY);
2859         if (ret)
2860                 goto fail;
2861
2862         property->flags = flags;
2863         property->num_values = num_values;
2864         INIT_LIST_HEAD(&property->enum_blob_list);
2865
2866         if (name) {
2867                 strncpy(property->name, name, DRM_PROP_NAME_LEN);
2868                 property->name[DRM_PROP_NAME_LEN-1] = '\0';
2869         }
2870
2871         list_add_tail(&property->head, &dev->mode_config.property_list);
2872         return property;
2873 fail:
2874         kfree(property->values);
2875         kfree(property);
2876         return NULL;
2877 }
2878 EXPORT_SYMBOL(drm_property_create);
2879
2880 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags,
2881                                          const char *name,
2882                                          const struct drm_prop_enum_list *props,
2883                                          int num_values)
2884 {
2885         struct drm_property *property;
2886         int i, ret;
2887
2888         flags |= DRM_MODE_PROP_ENUM;
2889
2890         property = drm_property_create(dev, flags, name, num_values);
2891         if (!property)
2892                 return NULL;
2893
2894         for (i = 0; i < num_values; i++) {
2895                 ret = drm_property_add_enum(property, i,
2896                                       props[i].type,
2897                                       props[i].name);
2898                 if (ret) {
2899                         drm_property_destroy(dev, property);
2900                         return NULL;
2901                 }
2902         }
2903
2904         return property;
2905 }
2906 EXPORT_SYMBOL(drm_property_create_enum);
2907
2908 struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
2909                                          int flags, const char *name,
2910                                          const struct drm_prop_enum_list *props,
2911                                          int num_values)
2912 {
2913         struct drm_property *property;
2914         int i, ret;
2915
2916         flags |= DRM_MODE_PROP_BITMASK;
2917
2918         property = drm_property_create(dev, flags, name, num_values);
2919         if (!property)
2920                 return NULL;
2921
2922         for (i = 0; i < num_values; i++) {
2923                 ret = drm_property_add_enum(property, i,
2924                                       props[i].type,
2925                                       props[i].name);
2926                 if (ret) {
2927                         drm_property_destroy(dev, property);
2928                         return NULL;
2929                 }
2930         }
2931
2932         return property;
2933 }
2934 EXPORT_SYMBOL(drm_property_create_bitmask);
2935
2936 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
2937                                          const char *name,
2938                                          uint64_t min, uint64_t max)
2939 {
2940         struct drm_property *property;
2941
2942         flags |= DRM_MODE_PROP_RANGE;
2943
2944         property = drm_property_create(dev, flags, name, 2);
2945         if (!property)
2946                 return NULL;
2947
2948         property->values[0] = min;
2949         property->values[1] = max;
2950
2951         return property;
2952 }
2953 EXPORT_SYMBOL(drm_property_create_range);
2954
2955 int drm_property_add_enum(struct drm_property *property, int index,
2956                           uint64_t value, const char *name)
2957 {
2958         struct drm_property_enum *prop_enum;
2959
2960         if (!(property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)))
2961                 return -EINVAL;
2962
2963         /*
2964          * Bitmask enum properties have the additional constraint of values
2965          * from 0 to 63
2966          */
2967         if ((property->flags & DRM_MODE_PROP_BITMASK) && (value > 63))
2968                 return -EINVAL;
2969
2970         if (!list_empty(&property->enum_blob_list)) {
2971                 list_for_each_entry(prop_enum, &property->enum_blob_list, head) {
2972                         if (prop_enum->value == value) {
2973                                 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
2974                                 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
2975                                 return 0;
2976                         }
2977                 }
2978         }
2979
2980         prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL);
2981         if (!prop_enum)
2982                 return -ENOMEM;
2983
2984         strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
2985         prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
2986         prop_enum->value = value;
2987
2988         property->values[index] = value;
2989         list_add_tail(&prop_enum->head, &property->enum_blob_list);
2990         return 0;
2991 }
2992 EXPORT_SYMBOL(drm_property_add_enum);
2993
2994 void drm_property_destroy(struct drm_device *dev, struct drm_property *property)
2995 {
2996         struct drm_property_enum *prop_enum, *pt;
2997
2998         list_for_each_entry_safe(prop_enum, pt, &property->enum_blob_list, head) {
2999                 list_del(&prop_enum->head);
3000                 kfree(prop_enum);
3001         }
3002
3003         if (property->num_values)
3004                 kfree(property->values);
3005         drm_mode_object_put(dev, &property->base);
3006         list_del(&property->head);
3007         kfree(property);
3008 }
3009 EXPORT_SYMBOL(drm_property_destroy);
3010
3011 void drm_object_attach_property(struct drm_mode_object *obj,
3012                                 struct drm_property *property,
3013                                 uint64_t init_val)
3014 {
3015         int count = obj->properties->count;
3016
3017         if (count == DRM_OBJECT_MAX_PROPERTY) {
3018                 WARN(1, "Failed to attach object property (type: 0x%x). Please "
3019                         "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
3020                         "you see this message on the same object type.\n",
3021                         obj->type);
3022                 return;
3023         }
3024
3025         obj->properties->ids[count] = property->base.id;
3026         obj->properties->values[count] = init_val;
3027         obj->properties->count++;
3028 }
3029 EXPORT_SYMBOL(drm_object_attach_property);
3030
3031 int drm_object_property_set_value(struct drm_mode_object *obj,
3032                                   struct drm_property *property, uint64_t val)
3033 {
3034         int i;
3035
3036         for (i = 0; i < obj->properties->count; i++) {
3037                 if (obj->properties->ids[i] == property->base.id) {
3038                         obj->properties->values[i] = val;
3039                         return 0;
3040                 }
3041         }
3042
3043         return -EINVAL;
3044 }
3045 EXPORT_SYMBOL(drm_object_property_set_value);
3046
3047 int drm_object_property_get_value(struct drm_mode_object *obj,
3048                                   struct drm_property *property, uint64_t *val)
3049 {
3050         int i;
3051
3052         for (i = 0; i < obj->properties->count; i++) {
3053                 if (obj->properties->ids[i] == property->base.id) {
3054                         *val = obj->properties->values[i];
3055                         return 0;
3056                 }
3057         }
3058
3059         return -EINVAL;
3060 }
3061 EXPORT_SYMBOL(drm_object_property_get_value);
3062
3063 int drm_mode_getproperty_ioctl(struct drm_device *dev,
3064                                void *data, struct drm_file *file_priv)
3065 {
3066         struct drm_mode_object *obj;
3067         struct drm_mode_get_property *out_resp = data;
3068         struct drm_property *property;
3069         int enum_count = 0;
3070         int blob_count = 0;
3071         int value_count = 0;
3072         int ret = 0, i;
3073         int copied;
3074         struct drm_property_enum *prop_enum;
3075         struct drm_mode_property_enum __user *enum_ptr;
3076         struct drm_property_blob *prop_blob;
3077         uint32_t __user *blob_id_ptr;
3078         uint64_t __user *values_ptr;
3079         uint32_t __user *blob_length_ptr;
3080
3081         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3082                 return -EINVAL;
3083
3084         drm_modeset_lock_all(dev);
3085         obj = drm_mode_object_find(dev, out_resp->prop_id, DRM_MODE_OBJECT_PROPERTY);
3086         if (!obj) {
3087                 ret = -ENOENT;
3088                 goto done;
3089         }
3090         property = obj_to_property(obj);
3091
3092         if (property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)) {
3093                 list_for_each_entry(prop_enum, &property->enum_blob_list, head)
3094                         enum_count++;
3095         } else if (property->flags & DRM_MODE_PROP_BLOB) {
3096                 list_for_each_entry(prop_blob, &property->enum_blob_list, head)
3097                         blob_count++;
3098         }
3099
3100         value_count = property->num_values;
3101
3102         strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN);
3103         out_resp->name[DRM_PROP_NAME_LEN-1] = 0;
3104         out_resp->flags = property->flags;
3105
3106         if ((out_resp->count_values >= value_count) && value_count) {
3107                 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr;
3108                 for (i = 0; i < value_count; i++) {
3109                         if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) {
3110                                 ret = -EFAULT;
3111                                 goto done;
3112                         }
3113                 }
3114         }
3115         out_resp->count_values = value_count;
3116
3117         if (property->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)) {
3118                 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) {
3119                         copied = 0;
3120                         enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr;
3121                         list_for_each_entry(prop_enum, &property->enum_blob_list, head) {
3122
3123                                 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) {
3124                                         ret = -EFAULT;
3125                                         goto done;
3126                                 }
3127
3128                                 if (copy_to_user(&enum_ptr[copied].name,
3129                                                  &prop_enum->name, DRM_PROP_NAME_LEN)) {
3130                                         ret = -EFAULT;
3131                                         goto done;
3132                                 }
3133                                 copied++;
3134                         }
3135                 }
3136                 out_resp->count_enum_blobs = enum_count;
3137         }
3138
3139         if (property->flags & DRM_MODE_PROP_BLOB) {
3140                 if ((out_resp->count_enum_blobs >= blob_count) && blob_count) {
3141                         copied = 0;
3142                         blob_id_ptr = (uint32_t __user *)(unsigned long)out_resp->enum_blob_ptr;
3143                         blob_length_ptr = (uint32_t __user *)(unsigned long)out_resp->values_ptr;
3144
3145                         list_for_each_entry(prop_blob, &property->enum_blob_list, head) {
3146                                 if (put_user(prop_blob->base.id, blob_id_ptr + copied)) {
3147                                         ret = -EFAULT;
3148                                         goto done;
3149                                 }
3150
3151                                 if (put_user(prop_blob->length, blob_length_ptr + copied)) {
3152                                         ret = -EFAULT;
3153                                         goto done;
3154                                 }
3155
3156                                 copied++;
3157                         }
3158                 }
3159                 out_resp->count_enum_blobs = blob_count;
3160         }
3161 done:
3162         drm_modeset_unlock_all(dev);
3163         return ret;
3164 }
3165
3166 static struct drm_property_blob *drm_property_create_blob(struct drm_device *dev, int length,
3167                                                           void *data)
3168 {
3169         struct drm_property_blob *blob;
3170         int ret;
3171
3172         if (!length || !data)
3173                 return NULL;
3174
3175         blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
3176         if (!blob)
3177                 return NULL;
3178
3179         ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB);
3180         if (ret) {
3181                 kfree(blob);
3182                 return NULL;
3183         }
3184
3185         blob->length = length;
3186
3187         memcpy(blob->data, data, length);
3188
3189         list_add_tail(&blob->head, &dev->mode_config.property_blob_list);
3190         return blob;
3191 }
3192
3193 static void drm_property_destroy_blob(struct drm_device *dev,
3194                                struct drm_property_blob *blob)
3195 {
3196         drm_mode_object_put(dev, &blob->base);
3197         list_del(&blob->head);
3198         kfree(blob);
3199 }
3200
3201 int drm_mode_getblob_ioctl(struct drm_device *dev,
3202                            void *data, struct drm_file *file_priv)
3203 {
3204         struct drm_mode_object *obj;
3205         struct drm_mode_get_blob *out_resp = data;
3206         struct drm_property_blob *blob;
3207         int ret = 0;
3208         void __user *blob_ptr;
3209
3210         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3211                 return -EINVAL;
3212
3213         drm_modeset_lock_all(dev);
3214         obj = drm_mode_object_find(dev, out_resp->blob_id, DRM_MODE_OBJECT_BLOB);
3215         if (!obj) {
3216                 ret = -ENOENT;
3217                 goto done;
3218         }
3219         blob = obj_to_blob(obj);
3220
3221         if (out_resp->length == blob->length) {
3222                 blob_ptr = (void __user *)(unsigned long)out_resp->data;
3223                 if (copy_to_user(blob_ptr, blob->data, blob->length)){
3224                         ret = -EFAULT;
3225                         goto done;
3226                 }
3227         }
3228         out_resp->length = blob->length;
3229
3230 done:
3231         drm_modeset_unlock_all(dev);
3232         return ret;
3233 }
3234
3235 int drm_mode_connector_update_edid_property(struct drm_connector *connector,
3236                                             struct edid *edid)
3237 {
3238         struct drm_device *dev = connector->dev;
3239         int ret, size;
3240
3241         if (connector->edid_blob_ptr)
3242                 drm_property_destroy_blob(dev, connector->edid_blob_ptr);
3243
3244         /* Delete edid, when there is none. */
3245         if (!edid) {
3246                 connector->edid_blob_ptr = NULL;
3247                 ret = drm_object_property_set_value(&connector->base, dev->mode_config.edid_property, 0);
3248                 return ret;
3249         }
3250
3251         size = EDID_LENGTH * (1 + edid->extensions);
3252         connector->edid_blob_ptr = drm_property_create_blob(connector->dev,
3253                                                             size, edid);
3254         if (!connector->edid_blob_ptr)
3255                 return -EINVAL;
3256
3257         ret = drm_object_property_set_value(&connector->base,
3258                                                dev->mode_config.edid_property,
3259                                                connector->edid_blob_ptr->base.id);
3260
3261         return ret;
3262 }
3263 EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
3264
3265 static bool drm_property_change_is_valid(struct drm_property *property,
3266                                          uint64_t value)
3267 {
3268         if (property->flags & DRM_MODE_PROP_IMMUTABLE)
3269                 return false;
3270         if (property->flags & DRM_MODE_PROP_RANGE) {
3271                 if (value < property->values[0] || value > property->values[1])
3272                         return false;
3273                 return true;
3274         } else if (property->flags & DRM_MODE_PROP_BITMASK) {
3275                 int i;
3276                 uint64_t valid_mask = 0;
3277                 for (i = 0; i < property->num_values; i++)
3278                         valid_mask |= (1ULL << property->values[i]);
3279                 return !(value & ~valid_mask);
3280         } else if (property->flags & DRM_MODE_PROP_BLOB) {
3281                 /* Only the driver knows */
3282                 return true;
3283         } else {
3284                 int i;
3285                 for (i = 0; i < property->num_values; i++)
3286                         if (property->values[i] == value)
3287                                 return true;
3288                 return false;
3289         }
3290 }
3291
3292 int drm_mode_connector_property_set_ioctl(struct drm_device *dev,
3293                                        void *data, struct drm_file *file_priv)
3294 {
3295         struct drm_mode_connector_set_property *conn_set_prop = data;
3296         struct drm_mode_obj_set_property obj_set_prop = {
3297                 .value = conn_set_prop->value,
3298                 .prop_id = conn_set_prop->prop_id,
3299                 .obj_id = conn_set_prop->connector_id,
3300                 .obj_type = DRM_MODE_OBJECT_CONNECTOR
3301         };
3302
3303         /* It does all the locking and checking we need */
3304         return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv);
3305 }
3306
3307 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
3308                                            struct drm_property *property,
3309                                            uint64_t value)
3310 {
3311         int ret = -EINVAL;
3312         struct drm_connector *connector = obj_to_connector(obj);
3313
3314         /* Do DPMS ourselves */
3315         if (property == connector->dev->mode_config.dpms_property) {
3316                 if (connector->funcs->dpms)
3317                         (*connector->funcs->dpms)(connector, (int)value);
3318                 ret = 0;
3319         } else if (connector->funcs->set_property)
3320                 ret = connector->funcs->set_property(connector, property, value);
3321
3322         /* store the property value if successful */
3323         if (!ret)
3324                 drm_object_property_set_value(&connector->base, property, value);
3325         return ret;
3326 }
3327
3328 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
3329                                       struct drm_property *property,
3330                                       uint64_t value)
3331 {
3332         int ret = -EINVAL;
3333         struct drm_crtc *crtc = obj_to_crtc(obj);
3334
3335         if (crtc->funcs->set_property)
3336                 ret = crtc->funcs->set_property(crtc, property, value);
3337         if (!ret)
3338                 drm_object_property_set_value(obj, property, value);
3339
3340         return ret;
3341 }
3342
3343 static int drm_mode_plane_set_obj_prop(struct drm_mode_object *obj,
3344                                       struct drm_property *property,
3345                                       uint64_t value)
3346 {
3347         int ret = -EINVAL;
3348         struct drm_plane *plane = obj_to_plane(obj);
3349
3350         if (plane->funcs->set_property)
3351                 ret = plane->funcs->set_property(plane, property, value);
3352         if (!ret)
3353                 drm_object_property_set_value(obj, property, value);
3354
3355         return ret;
3356 }
3357
3358 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
3359                                       struct drm_file *file_priv)
3360 {
3361         struct drm_mode_obj_get_properties *arg = data;
3362         struct drm_mode_object *obj;
3363         int ret = 0;
3364         int i;
3365         int copied = 0;
3366         int props_count = 0;
3367         uint32_t __user *props_ptr;
3368         uint64_t __user *prop_values_ptr;
3369
3370         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3371                 return -EINVAL;
3372
3373         drm_modeset_lock_all(dev);
3374
3375         obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
3376         if (!obj) {
3377                 ret = -ENOENT;
3378                 goto out;
3379         }
3380         if (!obj->properties) {
3381                 ret = -EINVAL;
3382                 goto out;
3383         }
3384
3385         props_count = obj->properties->count;
3386
3387         /* This ioctl is called twice, once to determine how much space is
3388          * needed, and the 2nd time to fill it. */
3389         if ((arg->count_props >= props_count) && props_count) {
3390                 copied = 0;
3391                 props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
3392                 prop_values_ptr = (uint64_t __user *)(unsigned long)
3393                                   (arg->prop_values_ptr);
3394                 for (i = 0; i < props_count; i++) {
3395                         if (put_user(obj->properties->ids[i],
3396                                      props_ptr + copied)) {
3397                                 ret = -EFAULT;
3398                                 goto out;
3399                         }
3400                         if (put_user(obj->properties->values[i],
3401                                      prop_values_ptr + copied)) {
3402                                 ret = -EFAULT;
3403                                 goto out;
3404                         }
3405                         copied++;
3406                 }
3407         }
3408         arg->count_props = props_count;
3409 out:
3410         drm_modeset_unlock_all(dev);
3411         return ret;
3412 }
3413
3414 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
3415                                     struct drm_file *file_priv)
3416 {
3417         struct drm_mode_obj_set_property *arg = data;
3418         struct drm_mode_object *arg_obj;
3419         struct drm_mode_object *prop_obj;
3420         struct drm_property *property;
3421         int ret = -EINVAL;
3422         int i;
3423
3424         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3425                 return -EINVAL;
3426
3427         drm_modeset_lock_all(dev);
3428
3429         arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
3430         if (!arg_obj) {
3431                 ret = -ENOENT;
3432                 goto out;
3433         }
3434         if (!arg_obj->properties)
3435                 goto out;
3436
3437         for (i = 0; i < arg_obj->properties->count; i++)
3438                 if (arg_obj->properties->ids[i] == arg->prop_id)
3439                         break;
3440
3441         if (i == arg_obj->properties->count)
3442                 goto out;
3443
3444         prop_obj = drm_mode_object_find(dev, arg->prop_id,
3445                                         DRM_MODE_OBJECT_PROPERTY);
3446         if (!prop_obj) {
3447                 ret = -ENOENT;
3448                 goto out;
3449         }
3450         property = obj_to_property(prop_obj);
3451
3452         if (!drm_property_change_is_valid(property, arg->value))
3453                 goto out;
3454
3455         switch (arg_obj->type) {
3456         case DRM_MODE_OBJECT_CONNECTOR:
3457                 ret = drm_mode_connector_set_obj_prop(arg_obj, property,
3458                                                       arg->value);
3459                 break;
3460         case DRM_MODE_OBJECT_CRTC:
3461                 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
3462                 break;
3463         case DRM_MODE_OBJECT_PLANE:
3464                 ret = drm_mode_plane_set_obj_prop(arg_obj, property, arg->value);
3465                 break;
3466         }
3467
3468 out:
3469         drm_modeset_unlock_all(dev);
3470         return ret;
3471 }
3472
3473 int drm_mode_connector_attach_encoder(struct drm_connector *connector,
3474                                       struct drm_encoder *encoder)
3475 {
3476         int i;
3477
3478         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
3479                 if (connector->encoder_ids[i] == 0) {
3480                         connector->encoder_ids[i] = encoder->base.id;
3481                         return 0;
3482                 }
3483         }
3484         return -ENOMEM;
3485 }
3486 EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
3487
3488 void drm_mode_connector_detach_encoder(struct drm_connector *connector,
3489                                     struct drm_encoder *encoder)
3490 {
3491         int i;
3492         for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
3493                 if (connector->encoder_ids[i] == encoder->base.id) {
3494                         connector->encoder_ids[i] = 0;
3495                         if (connector->encoder == encoder)
3496                                 connector->encoder = NULL;
3497                         break;
3498                 }
3499         }
3500 }
3501 EXPORT_SYMBOL(drm_mode_connector_detach_encoder);
3502
3503 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
3504                                   int gamma_size)
3505 {
3506         crtc->gamma_size = gamma_size;
3507
3508         crtc->gamma_store = kzalloc(gamma_size * sizeof(uint16_t) * 3, GFP_KERNEL);
3509         if (!crtc->gamma_store) {
3510                 crtc->gamma_size = 0;
3511                 return -ENOMEM;
3512         }
3513
3514         return 0;
3515 }
3516 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size);
3517
3518 int drm_mode_gamma_set_ioctl(struct drm_device *dev,
3519                              void *data, struct drm_file *file_priv)
3520 {
3521         struct drm_mode_crtc_lut *crtc_lut = data;
3522         struct drm_mode_object *obj;
3523         struct drm_crtc *crtc;
3524         void *r_base, *g_base, *b_base;
3525         int size;
3526         int ret = 0;
3527
3528         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3529                 return -EINVAL;
3530
3531         drm_modeset_lock_all(dev);
3532         obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
3533         if (!obj) {
3534                 ret = -ENOENT;
3535                 goto out;
3536         }
3537         crtc = obj_to_crtc(obj);
3538
3539         if (crtc->funcs->gamma_set == NULL) {
3540                 ret = -ENOSYS;
3541                 goto out;
3542         }
3543
3544         /* memcpy into gamma store */
3545         if (crtc_lut->gamma_size != crtc->gamma_size) {
3546                 ret = -EINVAL;
3547                 goto out;
3548         }
3549
3550         size = crtc_lut->gamma_size * (sizeof(uint16_t));
3551         r_base = crtc->gamma_store;
3552         if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) {
3553                 ret = -EFAULT;
3554                 goto out;
3555         }
3556
3557         g_base = r_base + size;
3558         if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) {
3559                 ret = -EFAULT;
3560                 goto out;
3561         }
3562
3563         b_base = g_base + size;
3564         if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) {
3565                 ret = -EFAULT;
3566                 goto out;
3567         }
3568
3569         crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
3570
3571 out:
3572         drm_modeset_unlock_all(dev);
3573         return ret;
3574
3575 }
3576
3577 int drm_mode_gamma_get_ioctl(struct drm_device *dev,
3578                              void *data, struct drm_file *file_priv)
3579 {
3580         struct drm_mode_crtc_lut *crtc_lut = data;
3581         struct drm_mode_object *obj;
3582         struct drm_crtc *crtc;
3583         void *r_base, *g_base, *b_base;
3584         int size;
3585         int ret = 0;
3586
3587         if (!drm_core_check_feature(dev, DRIVER_MODESET))
3588                 return -EINVAL;
3589
3590         drm_modeset_lock_all(dev);
3591         obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
3592         if (!obj) {
3593                 ret = -ENOENT;
3594                 goto out;
3595         }
3596         crtc = obj_to_crtc(obj);
3597
3598         /* memcpy into gamma store */
3599         if (crtc_lut->gamma_size != crtc->gamma_size) {
3600                 ret = -EINVAL;
3601                 goto out;
3602         }
3603
3604         size = crtc_lut->gamma_size * (sizeof(uint16_t));
3605         r_base = crtc->gamma_store;
3606         if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) {
3607                 ret = -EFAULT;
3608                 goto out;
3609         }
3610
3611         g_base = r_base + size;
3612         if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) {
3613                 ret = -EFAULT;
3614                 goto out;
3615         }
3616
3617         b_base = g_base + size;
3618         if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) {
3619                 ret = -EFAULT;
3620                 goto out;
3621         }
3622 out:
3623         drm_modeset_unlock_all(dev);
3624         return ret;
3625 }
3626
3627 int drm_mode_page_flip_ioctl(struct drm_device *dev,
3628                              void *data, struct drm_file *file_priv)
3629 {
3630         struct drm_mode_crtc_page_flip *page_flip = data;
3631         struct drm_mode_object *obj;
3632         struct drm_crtc *crtc;
3633         struct drm_framebuffer *fb = NULL, *old_fb = NULL;
3634         struct drm_pending_vblank_event *e = NULL;
3635         unsigned long flags;
3636         int ret = -EINVAL;
3637
3638         if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS ||
3639             page_flip->reserved != 0)
3640                 return -EINVAL;
3641
3642         if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip)
3643                 return -EINVAL;
3644
3645         obj = drm_mode_object_find(dev, page_flip->crtc_id, DRM_MODE_OBJECT_CRTC);
3646         if (!obj)
3647                 return -ENOENT;
3648         crtc = obj_to_crtc(obj);
3649
3650         mutex_lock(&crtc->mutex);
3651         if (crtc->fb == NULL) {
3652                 /* The framebuffer is currently unbound, presumably
3653                  * due to a hotplug event, that userspace has not
3654                  * yet discovered.
3655                  */
3656                 ret = -EBUSY;
3657                 goto out;
3658         }
3659
3660         if (crtc->funcs->page_flip == NULL)
3661                 goto out;
3662
3663         fb = drm_framebuffer_lookup(dev, page_flip->fb_id);
3664         if (!fb) {
3665                 ret = -ENOENT;
3666                 goto out;
3667         }
3668
3669         ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb);
3670         if (ret)
3671                 goto out;
3672
3673         if (crtc->fb->pixel_format != fb->pixel_format) {
3674                 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
3675                 ret = -EINVAL;
3676                 goto out;
3677         }
3678
3679         if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
3680                 ret = -ENOMEM;
3681                 spin_lock_irqsave(&dev->event_lock, flags);
3682                 if (file_priv->event_space < sizeof e->event) {
3683                         spin_unlock_irqrestore(&dev->event_lock, flags);
3684                         goto out;
3685                 }
3686                 file_priv->event_space -= sizeof e->event;
3687                 spin_unlock_irqrestore(&dev->event_lock, flags);
3688
3689                 e = kzalloc(sizeof *e, GFP_KERNEL);
3690                 if (e == NULL) {
3691                         spin_lock_irqsave(&dev->event_lock, flags);
3692                         file_priv->event_space += sizeof e->event;
3693                         spin_unlock_irqrestore(&dev->event_lock, flags);
3694                         goto out;
3695                 }
3696
3697                 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
3698                 e->event.base.length = sizeof e->event;
3699                 e->event.user_data = page_flip->user_data;
3700                 e->base.event = &e->event.base;
3701                 e->base.file_priv = file_priv;
3702                 e->base.destroy =
3703                         (void (*) (struct drm_pending_event *)) kfree;
3704         }
3705
3706         old_fb = crtc->fb;
3707         ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags);
3708         if (ret) {
3709                 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
3710                         spin_lock_irqsave(&dev->event_lock, flags);
3711                         file_priv->event_space += sizeof e->event;
3712                         spin_unlock_irqrestore(&dev->event_lock, flags);
3713                         kfree(e);
3714                 }
3715                 /* Keep the old fb, don't unref it. */
3716                 old_fb = NULL;
3717         } else {
3718                 /*
3719                  * Warn if the driver hasn't properly updated the crtc->fb
3720                  * field to reflect that the new framebuffer is now used.
3721                  * Failing to do so will screw with the reference counting
3722                  * on framebuffers.
3723                  */
3724                 WARN_ON(crtc->fb != fb);
3725                 /* Unref only the old framebuffer. */
3726                 fb = NULL;
3727         }
3728
3729 out:
3730         if (fb)
3731                 drm_framebuffer_unreference(fb);
3732         if (old_fb)
3733                 drm_framebuffer_unreference(old_fb);
3734         mutex_unlock(&crtc->mutex);
3735
3736         return ret;
3737 }
3738
3739 void drm_mode_config_reset(struct drm_device *dev)
3740 {
3741         struct drm_crtc *crtc;
3742         struct drm_encoder *encoder;
3743         struct drm_connector *connector;
3744
3745         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
3746                 if (crtc->funcs->reset)
3747                         crtc->funcs->reset(crtc);
3748
3749         list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
3750                 if (encoder->funcs->reset)
3751                         encoder->funcs->reset(encoder);
3752
3753         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
3754                 connector->status = connector_status_unknown;
3755
3756                 if (connector->funcs->reset)
3757                         connector->funcs->reset(connector);
3758         }
3759 }
3760 EXPORT_SYMBOL(drm_mode_config_reset);
3761
3762 int drm_mode_create_dumb_ioctl(struct drm_device *dev,
3763                                void *data, struct drm_file *file_priv)
3764 {
3765         struct drm_mode_create_dumb *args = data;
3766
3767         if (!dev->driver->dumb_create)
3768                 return -ENOSYS;
3769         return dev->driver->dumb_create(file_priv, dev, args);
3770 }
3771
3772 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
3773                              void *data, struct drm_file *file_priv)
3774 {
3775         struct drm_mode_map_dumb *args = data;
3776
3777         /* call driver ioctl to get mmap offset */
3778         if (!dev->driver->dumb_map_offset)
3779                 return -ENOSYS;
3780
3781         return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset);
3782 }
3783
3784 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
3785                                 void *data, struct drm_file *file_priv)
3786 {
3787         struct drm_mode_destroy_dumb *args = data;
3788
3789         if (!dev->driver->dumb_destroy)
3790                 return -ENOSYS;
3791
3792         return dev->driver->dumb_destroy(file_priv, dev, args->handle);
3793 }
3794
3795 /*
3796  * Just need to support RGB formats here for compat with code that doesn't
3797  * use pixel formats directly yet.
3798  */
3799 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
3800                           int *bpp)
3801 {
3802         switch (format) {
3803         case DRM_FORMAT_C8:
3804         case DRM_FORMAT_RGB332:
3805         case DRM_FORMAT_BGR233:
3806                 *depth = 8;
3807                 *bpp = 8;
3808                 break;
3809         case DRM_FORMAT_XRGB1555:
3810         case DRM_FORMAT_XBGR1555:
3811         case DRM_FORMAT_RGBX5551:
3812         case DRM_FORMAT_BGRX5551:
3813         case DRM_FORMAT_ARGB1555:
3814         case DRM_FORMAT_ABGR1555:
3815         case DRM_FORMAT_RGBA5551:
3816         case DRM_FORMAT_BGRA5551:
3817                 *depth = 15;
3818                 *bpp = 16;
3819                 break;
3820         case DRM_FORMAT_RGB565:
3821         case DRM_FORMAT_BGR565:
3822                 *depth = 16;
3823                 *bpp = 16;
3824                 break;
3825         case DRM_FORMAT_RGB888:
3826         case DRM_FORMAT_BGR888:
3827                 *depth = 24;
3828                 *bpp = 24;
3829                 break;
3830         case DRM_FORMAT_XRGB8888:
3831         case DRM_FORMAT_XBGR8888:
3832         case DRM_FORMAT_RGBX8888:
3833         case DRM_FORMAT_BGRX8888:
3834                 *depth = 24;
3835                 *bpp = 32;
3836                 break;
3837         case DRM_FORMAT_XRGB2101010:
3838         case DRM_FORMAT_XBGR2101010:
3839         case DRM_FORMAT_RGBX1010102:
3840         case DRM_FORMAT_BGRX1010102:
3841         case DRM_FORMAT_ARGB2101010:
3842         case DRM_FORMAT_ABGR2101010:
3843         case DRM_FORMAT_RGBA1010102:
3844         case DRM_FORMAT_BGRA1010102:
3845                 *depth = 30;
3846                 *bpp = 32;
3847                 break;
3848         case DRM_FORMAT_ARGB8888:
3849         case DRM_FORMAT_ABGR8888:
3850         case DRM_FORMAT_RGBA8888:
3851         case DRM_FORMAT_BGRA8888:
3852                 *depth = 32;
3853                 *bpp = 32;
3854                 break;
3855         default:
3856                 DRM_DEBUG_KMS("unsupported pixel format %s\n",
3857                               drm_get_format_name(format));
3858                 *depth = 0;
3859                 *bpp = 0;
3860                 break;
3861         }
3862 }
3863 EXPORT_SYMBOL(drm_fb_get_bpp_depth);
3864
3865 /**
3866  * drm_format_num_planes - get the number of planes for format
3867  * @format: pixel format (DRM_FORMAT_*)
3868  *
3869  * RETURNS:
3870  * The number of planes used by the specified pixel format.
3871  */
3872 int drm_format_num_planes(uint32_t format)
3873 {
3874         switch (format) {
3875         case DRM_FORMAT_YUV410:
3876         case DRM_FORMAT_YVU410:
3877         case DRM_FORMAT_YUV411:
3878         case DRM_FORMAT_YVU411:
3879         case DRM_FORMAT_YUV420:
3880         case DRM_FORMAT_YVU420:
3881         case DRM_FORMAT_YUV422:
3882         case DRM_FORMAT_YVU422:
3883         case DRM_FORMAT_YUV444:
3884         case DRM_FORMAT_YVU444:
3885                 return 3;
3886         case DRM_FORMAT_NV12:
3887         case DRM_FORMAT_NV21:
3888         case DRM_FORMAT_NV16:
3889         case DRM_FORMAT_NV61:
3890         case DRM_FORMAT_NV24:
3891         case DRM_FORMAT_NV42:
3892                 return 2;
3893         default:
3894                 return 1;
3895         }
3896 }
3897 EXPORT_SYMBOL(drm_format_num_planes);
3898
3899 /**
3900  * drm_format_plane_cpp - determine the bytes per pixel value
3901  * @format: pixel format (DRM_FORMAT_*)
3902  * @plane: plane index
3903  *
3904  * RETURNS:
3905  * The bytes per pixel value for the specified plane.
3906  */
3907 int drm_format_plane_cpp(uint32_t format, int plane)
3908 {
3909         unsigned int depth;
3910         int bpp;
3911
3912         if (plane >= drm_format_num_planes(format))
3913                 return 0;
3914
3915         switch (format) {
3916         case DRM_FORMAT_YUYV:
3917         case DRM_FORMAT_YVYU:
3918         case DRM_FORMAT_UYVY:
3919         case DRM_FORMAT_VYUY:
3920                 return 2;
3921         case DRM_FORMAT_NV12:
3922         case DRM_FORMAT_NV21:
3923         case DRM_FORMAT_NV16:
3924         case DRM_FORMAT_NV61:
3925         case DRM_FORMAT_NV24:
3926         case DRM_FORMAT_NV42:
3927                 return plane ? 2 : 1;
3928         case DRM_FORMAT_YUV410:
3929         case DRM_FORMAT_YVU410:
3930         case DRM_FORMAT_YUV411:
3931         case DRM_FORMAT_YVU411:
3932         case DRM_FORMAT_YUV420:
3933         case DRM_FORMAT_YVU420:
3934         case DRM_FORMAT_YUV422:
3935         case DRM_FORMAT_YVU422:
3936         case DRM_FORMAT_YUV444:
3937         case DRM_FORMAT_YVU444:
3938                 return 1;
3939         default:
3940                 drm_fb_get_bpp_depth(format, &depth, &bpp);
3941                 return bpp >> 3;
3942         }
3943 }
3944 EXPORT_SYMBOL(drm_format_plane_cpp);
3945
3946 /**
3947  * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor
3948  * @format: pixel format (DRM_FORMAT_*)
3949  *
3950  * RETURNS:
3951  * The horizontal chroma subsampling factor for the
3952  * specified pixel format.
3953  */
3954 int drm_format_horz_chroma_subsampling(uint32_t format)
3955 {
3956         switch (format) {
3957         case DRM_FORMAT_YUV411:
3958         case DRM_FORMAT_YVU411:
3959         case DRM_FORMAT_YUV410:
3960         case DRM_FORMAT_YVU410:
3961                 return 4;
3962         case DRM_FORMAT_YUYV:
3963         case DRM_FORMAT_YVYU:
3964         case DRM_FORMAT_UYVY:
3965         case DRM_FORMAT_VYUY:
3966         case DRM_FORMAT_NV12:
3967         case DRM_FORMAT_NV21:
3968         case DRM_FORMAT_NV16:
3969         case DRM_FORMAT_NV61:
3970         case DRM_FORMAT_YUV422:
3971         case DRM_FORMAT_YVU422:
3972         case DRM_FORMAT_YUV420:
3973         case DRM_FORMAT_YVU420:
3974                 return 2;
3975         default:
3976                 return 1;
3977         }
3978 }
3979 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling);
3980
3981 /**
3982  * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor
3983  * @format: pixel format (DRM_FORMAT_*)
3984  *
3985  * RETURNS:
3986  * The vertical chroma subsampling factor for the
3987  * specified pixel format.
3988  */
3989 int drm_format_vert_chroma_subsampling(uint32_t format)
3990 {
3991         switch (format) {
3992         case DRM_FORMAT_YUV410:
3993         case DRM_FORMAT_YVU410:
3994                 return 4;
3995         case DRM_FORMAT_YUV420:
3996         case DRM_FORMAT_YVU420:
3997         case DRM_FORMAT_NV12:
3998         case DRM_FORMAT_NV21:
3999                 return 2;
4000         default:
4001                 return 1;
4002         }
4003 }
4004 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling);
4005
4006 /**
4007  * drm_mode_config_init - initialize DRM mode_configuration structure
4008  * @dev: DRM device
4009  *
4010  * Initialize @dev's mode_config structure, used for tracking the graphics
4011  * configuration of @dev.
4012  *
4013  * Since this initializes the modeset locks, no locking is possible. Which is no
4014  * problem, since this should happen single threaded at init time. It is the
4015  * driver's problem to ensure this guarantee.
4016  *
4017  */
4018 void drm_mode_config_init(struct drm_device *dev)
4019 {
4020         mutex_init(&dev->mode_config.mutex);
4021         mutex_init(&dev->mode_config.idr_mutex);
4022         mutex_init(&dev->mode_config.fb_lock);
4023         INIT_LIST_HEAD(&dev->mode_config.fb_list);
4024         INIT_LIST_HEAD(&dev->mode_config.crtc_list);
4025         INIT_LIST_HEAD(&dev->mode_config.connector_list);
4026         INIT_LIST_HEAD(&dev->mode_config.bridge_list);
4027         INIT_LIST_HEAD(&dev->mode_config.encoder_list);
4028         INIT_LIST_HEAD(&dev->mode_config.property_list);
4029         INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
4030         INIT_LIST_HEAD(&dev->mode_config.plane_list);
4031         idr_init(&dev->mode_config.crtc_idr);
4032
4033         drm_modeset_lock_all(dev);
4034         drm_mode_create_standard_connector_properties(dev);
4035         drm_modeset_unlock_all(dev);
4036
4037         /* Just to be sure */
4038         dev->mode_config.num_fb = 0;
4039         dev->mode_config.num_connector = 0;
4040         dev->mode_config.num_crtc = 0;
4041         dev->mode_config.num_encoder = 0;
4042 }
4043 EXPORT_SYMBOL(drm_mode_config_init);
4044
4045 /**
4046  * drm_mode_config_cleanup - free up DRM mode_config info
4047  * @dev: DRM device
4048  *
4049  * Free up all the connectors and CRTCs associated with this DRM device, then
4050  * free up the framebuffers and associated buffer objects.
4051  *
4052  * Note that since this /should/ happen single-threaded at driver/device
4053  * teardown time, no locking is required. It's the driver's job to ensure that
4054  * this guarantee actually holds true.
4055  *
4056  * FIXME: cleanup any dangling user buffer objects too
4057  */
4058 void drm_mode_config_cleanup(struct drm_device *dev)
4059 {
4060         struct drm_connector *connector, *ot;
4061         struct drm_crtc *crtc, *ct;
4062         struct drm_encoder *encoder, *enct;
4063         struct drm_bridge *bridge, *brt;
4064         struct drm_framebuffer *fb, *fbt;
4065         struct drm_property *property, *pt;
4066         struct drm_property_blob *blob, *bt;
4067         struct drm_plane *plane, *plt;
4068
4069         list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
4070                                  head) {
4071                 encoder->funcs->destroy(encoder);
4072         }
4073
4074         list_for_each_entry_safe(bridge, brt,
4075                                  &dev->mode_config.bridge_list, head) {
4076                 bridge->funcs->destroy(bridge);
4077         }
4078
4079         list_for_each_entry_safe(connector, ot,
4080                                  &dev->mode_config.connector_list, head) {
4081                 connector->funcs->destroy(connector);
4082         }
4083
4084         list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
4085                                  head) {
4086                 drm_property_destroy(dev, property);
4087         }
4088
4089         list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
4090                                  head) {
4091                 drm_property_destroy_blob(dev, blob);
4092         }
4093
4094         /*
4095          * Single-threaded teardown context, so it's not required to grab the
4096          * fb_lock to protect against concurrent fb_list access. Contrary, it
4097          * would actually deadlock with the drm_framebuffer_cleanup function.
4098          *
4099          * Also, if there are any framebuffers left, that's a driver leak now,
4100          * so politely WARN about this.
4101          */
4102         WARN_ON(!list_empty(&dev->mode_config.fb_list));
4103         list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
4104                 drm_framebuffer_remove(fb);
4105         }
4106
4107         list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
4108                                  head) {
4109                 plane->funcs->destroy(plane);
4110         }
4111
4112         list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
4113                 crtc->funcs->destroy(crtc);
4114         }
4115
4116         idr_destroy(&dev->mode_config.crtc_idr);
4117 }
4118 EXPORT_SYMBOL(drm_mode_config_cleanup);