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