drm_crtc.c revision c394c2b08e247c32ef292b75fd8b34312465f8ae
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#include <drm/drm_modeset_lock.h> 41 42#include "drm_crtc_internal.h" 43 44static struct drm_framebuffer *add_framebuffer_internal(struct drm_device *dev, 45 struct drm_mode_fb_cmd2 *r, 46 struct drm_file *file_priv); 47 48/** 49 * drm_modeset_lock_all - take all modeset locks 50 * @dev: drm device 51 * 52 * This function takes all modeset locks, suitable where a more fine-grained 53 * scheme isn't (yet) implemented. Locks must be dropped with 54 * drm_modeset_unlock_all. 55 */ 56void drm_modeset_lock_all(struct drm_device *dev) 57{ 58 struct drm_mode_config *config = &dev->mode_config; 59 struct drm_modeset_acquire_ctx *ctx; 60 int ret; 61 62 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 63 if (WARN_ON(!ctx)) 64 return; 65 66 mutex_lock(&config->mutex); 67 68 drm_modeset_acquire_init(ctx, 0); 69 70retry: 71 ret = drm_modeset_lock(&config->connection_mutex, ctx); 72 if (ret) 73 goto fail; 74 ret = drm_modeset_lock_all_crtcs(dev, ctx); 75 if (ret) 76 goto fail; 77 78 WARN_ON(config->acquire_ctx); 79 80 /* now we hold the locks, so now that it is safe, stash the 81 * ctx for drm_modeset_unlock_all(): 82 */ 83 config->acquire_ctx = ctx; 84 85 drm_warn_on_modeset_not_all_locked(dev); 86 87 return; 88 89fail: 90 if (ret == -EDEADLK) { 91 drm_modeset_backoff(ctx); 92 goto retry; 93 } 94} 95EXPORT_SYMBOL(drm_modeset_lock_all); 96 97/** 98 * drm_modeset_unlock_all - drop all modeset locks 99 * @dev: device 100 * 101 * This function drop all modeset locks taken by drm_modeset_lock_all. 102 */ 103void drm_modeset_unlock_all(struct drm_device *dev) 104{ 105 struct drm_mode_config *config = &dev->mode_config; 106 struct drm_modeset_acquire_ctx *ctx = config->acquire_ctx; 107 108 if (WARN_ON(!ctx)) 109 return; 110 111 config->acquire_ctx = NULL; 112 drm_modeset_drop_locks(ctx); 113 drm_modeset_acquire_fini(ctx); 114 115 kfree(ctx); 116 117 mutex_unlock(&dev->mode_config.mutex); 118} 119EXPORT_SYMBOL(drm_modeset_unlock_all); 120 121/** 122 * drm_warn_on_modeset_not_all_locked - check that all modeset locks are locked 123 * @dev: device 124 * 125 * Useful as a debug assert. 126 */ 127void drm_warn_on_modeset_not_all_locked(struct drm_device *dev) 128{ 129 struct drm_crtc *crtc; 130 131 /* Locking is currently fubar in the panic handler. */ 132 if (oops_in_progress) 133 return; 134 135 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 136 WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); 137 138 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); 139 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); 140} 141EXPORT_SYMBOL(drm_warn_on_modeset_not_all_locked); 142 143/* Avoid boilerplate. I'm tired of typing. */ 144#define DRM_ENUM_NAME_FN(fnname, list) \ 145 const char *fnname(int val) \ 146 { \ 147 int i; \ 148 for (i = 0; i < ARRAY_SIZE(list); i++) { \ 149 if (list[i].type == val) \ 150 return list[i].name; \ 151 } \ 152 return "(unknown)"; \ 153 } 154 155/* 156 * Global properties 157 */ 158static const struct drm_prop_enum_list drm_dpms_enum_list[] = 159{ { DRM_MODE_DPMS_ON, "On" }, 160 { DRM_MODE_DPMS_STANDBY, "Standby" }, 161 { DRM_MODE_DPMS_SUSPEND, "Suspend" }, 162 { DRM_MODE_DPMS_OFF, "Off" } 163}; 164 165DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) 166 167static const struct drm_prop_enum_list drm_plane_type_enum_list[] = 168{ 169 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 170 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 171 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 172}; 173 174/* 175 * Optional properties 176 */ 177static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = 178{ 179 { DRM_MODE_SCALE_NONE, "None" }, 180 { DRM_MODE_SCALE_FULLSCREEN, "Full" }, 181 { DRM_MODE_SCALE_CENTER, "Center" }, 182 { DRM_MODE_SCALE_ASPECT, "Full aspect" }, 183}; 184 185/* 186 * Non-global properties, but "required" for certain connectors. 187 */ 188static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = 189{ 190 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 191 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 192 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 193}; 194 195DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) 196 197static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = 198{ 199 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 200 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 201 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 202}; 203 204DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, 205 drm_dvi_i_subconnector_enum_list) 206 207static const struct drm_prop_enum_list drm_tv_select_enum_list[] = 208{ 209 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 210 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 211 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 212 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 213 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 214}; 215 216DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) 217 218static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = 219{ 220 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 221 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 222 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 223 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 224 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 225}; 226 227DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, 228 drm_tv_subconnector_enum_list) 229 230static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = { 231 { DRM_MODE_DIRTY_OFF, "Off" }, 232 { DRM_MODE_DIRTY_ON, "On" }, 233 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" }, 234}; 235 236struct drm_conn_prop_enum_list { 237 int type; 238 const char *name; 239 struct ida ida; 240}; 241 242/* 243 * Connector and encoder types. 244 */ 245static struct drm_conn_prop_enum_list drm_connector_enum_list[] = 246{ { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, 247 { DRM_MODE_CONNECTOR_VGA, "VGA" }, 248 { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, 249 { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, 250 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, 251 { DRM_MODE_CONNECTOR_Composite, "Composite" }, 252 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, 253 { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, 254 { DRM_MODE_CONNECTOR_Component, "Component" }, 255 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, 256 { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, 257 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, 258 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, 259 { DRM_MODE_CONNECTOR_TV, "TV" }, 260 { DRM_MODE_CONNECTOR_eDP, "eDP" }, 261 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, 262 { DRM_MODE_CONNECTOR_DSI, "DSI" }, 263}; 264 265static const struct drm_prop_enum_list drm_encoder_enum_list[] = 266{ { DRM_MODE_ENCODER_NONE, "None" }, 267 { DRM_MODE_ENCODER_DAC, "DAC" }, 268 { DRM_MODE_ENCODER_TMDS, "TMDS" }, 269 { DRM_MODE_ENCODER_LVDS, "LVDS" }, 270 { DRM_MODE_ENCODER_TVDAC, "TV" }, 271 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" }, 272 { DRM_MODE_ENCODER_DSI, "DSI" }, 273 { DRM_MODE_ENCODER_DPMST, "DP MST" }, 274}; 275 276static const struct drm_prop_enum_list drm_subpixel_enum_list[] = 277{ 278 { SubPixelUnknown, "Unknown" }, 279 { SubPixelHorizontalRGB, "Horizontal RGB" }, 280 { SubPixelHorizontalBGR, "Horizontal BGR" }, 281 { SubPixelVerticalRGB, "Vertical RGB" }, 282 { SubPixelVerticalBGR, "Vertical BGR" }, 283 { SubPixelNone, "None" }, 284}; 285 286void drm_connector_ida_init(void) 287{ 288 int i; 289 290 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 291 ida_init(&drm_connector_enum_list[i].ida); 292} 293 294void drm_connector_ida_destroy(void) 295{ 296 int i; 297 298 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 299 ida_destroy(&drm_connector_enum_list[i].ida); 300} 301 302/** 303 * drm_get_connector_status_name - return a string for connector status 304 * @status: connector status to compute name of 305 * 306 * In contrast to the other drm_get_*_name functions this one here returns a 307 * const pointer and hence is threadsafe. 308 */ 309const char *drm_get_connector_status_name(enum drm_connector_status status) 310{ 311 if (status == connector_status_connected) 312 return "connected"; 313 else if (status == connector_status_disconnected) 314 return "disconnected"; 315 else 316 return "unknown"; 317} 318EXPORT_SYMBOL(drm_get_connector_status_name); 319 320/** 321 * drm_get_subpixel_order_name - return a string for a given subpixel enum 322 * @order: enum of subpixel_order 323 * 324 * Note you could abuse this and return something out of bounds, but that 325 * would be a caller error. No unscrubbed user data should make it here. 326 */ 327const char *drm_get_subpixel_order_name(enum subpixel_order order) 328{ 329 return drm_subpixel_enum_list[order].name; 330} 331EXPORT_SYMBOL(drm_get_subpixel_order_name); 332 333static char printable_char(int c) 334{ 335 return isascii(c) && isprint(c) ? c : '?'; 336} 337 338/** 339 * drm_get_format_name - return a string for drm fourcc format 340 * @format: format to compute name of 341 * 342 * Note that the buffer used by this function is globally shared and owned by 343 * the function itself. 344 * 345 * FIXME: This isn't really multithreading safe. 346 */ 347const char *drm_get_format_name(uint32_t format) 348{ 349 static char buf[32]; 350 351 snprintf(buf, sizeof(buf), 352 "%c%c%c%c %s-endian (0x%08x)", 353 printable_char(format & 0xff), 354 printable_char((format >> 8) & 0xff), 355 printable_char((format >> 16) & 0xff), 356 printable_char((format >> 24) & 0x7f), 357 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", 358 format); 359 360 return buf; 361} 362EXPORT_SYMBOL(drm_get_format_name); 363 364/** 365 * drm_mode_object_get - allocate a new modeset identifier 366 * @dev: DRM device 367 * @obj: object pointer, used to generate unique ID 368 * @obj_type: object type 369 * 370 * Create a unique identifier based on @ptr in @dev's identifier space. Used 371 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix 372 * modeset identifiers are _not_ reference counted. Hence don't use this for 373 * reference counted modeset objects like framebuffers. 374 * 375 * Returns: 376 * New unique (relative to other objects in @dev) integer identifier for the 377 * object. 378 */ 379int drm_mode_object_get(struct drm_device *dev, 380 struct drm_mode_object *obj, uint32_t obj_type) 381{ 382 int ret; 383 384 mutex_lock(&dev->mode_config.idr_mutex); 385 ret = idr_alloc(&dev->mode_config.crtc_idr, obj, 1, 0, GFP_KERNEL); 386 if (ret >= 0) { 387 /* 388 * Set up the object linking under the protection of the idr 389 * lock so that other users can't see inconsistent state. 390 */ 391 obj->id = ret; 392 obj->type = obj_type; 393 } 394 mutex_unlock(&dev->mode_config.idr_mutex); 395 396 return ret < 0 ? ret : 0; 397} 398 399/** 400 * drm_mode_object_put - free a modeset identifer 401 * @dev: DRM device 402 * @object: object to free 403 * 404 * Free @id from @dev's unique identifier pool. Note that despite the _get 405 * postfix modeset identifiers are _not_ reference counted. Hence don't use this 406 * for reference counted modeset objects like framebuffers. 407 */ 408void drm_mode_object_put(struct drm_device *dev, 409 struct drm_mode_object *object) 410{ 411 mutex_lock(&dev->mode_config.idr_mutex); 412 idr_remove(&dev->mode_config.crtc_idr, object->id); 413 mutex_unlock(&dev->mode_config.idr_mutex); 414} 415 416static struct drm_mode_object *_object_find(struct drm_device *dev, 417 uint32_t id, uint32_t type) 418{ 419 struct drm_mode_object *obj = NULL; 420 421 mutex_lock(&dev->mode_config.idr_mutex); 422 obj = idr_find(&dev->mode_config.crtc_idr, id); 423 if (!obj || (type != DRM_MODE_OBJECT_ANY && obj->type != type) || 424 (obj->id != id)) 425 obj = NULL; 426 mutex_unlock(&dev->mode_config.idr_mutex); 427 428 return obj; 429} 430 431/** 432 * drm_mode_object_find - look up a drm object with static lifetime 433 * @dev: drm device 434 * @id: id of the mode object 435 * @type: type of the mode object 436 * 437 * Note that framebuffers cannot be looked up with this functions - since those 438 * are reference counted, they need special treatment. Even with 439 * DRM_MODE_OBJECT_ANY (although that will simply return NULL 440 * rather than WARN_ON()). 441 */ 442struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, 443 uint32_t id, uint32_t type) 444{ 445 struct drm_mode_object *obj = NULL; 446 447 /* Framebuffers are reference counted and need their own lookup 448 * function.*/ 449 WARN_ON(type == DRM_MODE_OBJECT_FB); 450 obj = _object_find(dev, id, type); 451 /* don't leak out unref'd fb's */ 452 if (obj && (obj->type == DRM_MODE_OBJECT_FB)) 453 obj = NULL; 454 return obj; 455} 456EXPORT_SYMBOL(drm_mode_object_find); 457 458/** 459 * drm_framebuffer_init - initialize a framebuffer 460 * @dev: DRM device 461 * @fb: framebuffer to be initialized 462 * @funcs: ... with these functions 463 * 464 * Allocates an ID for the framebuffer's parent mode object, sets its mode 465 * functions & device file and adds it to the master fd list. 466 * 467 * IMPORTANT: 468 * This functions publishes the fb and makes it available for concurrent access 469 * by other users. Which means by this point the fb _must_ be fully set up - 470 * since all the fb attributes are invariant over its lifetime, no further 471 * locking but only correct reference counting is required. 472 * 473 * Returns: 474 * Zero on success, error code on failure. 475 */ 476int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, 477 const struct drm_framebuffer_funcs *funcs) 478{ 479 int ret; 480 481 mutex_lock(&dev->mode_config.fb_lock); 482 kref_init(&fb->refcount); 483 INIT_LIST_HEAD(&fb->filp_head); 484 fb->dev = dev; 485 fb->funcs = funcs; 486 487 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB); 488 if (ret) 489 goto out; 490 491 /* Grab the idr reference. */ 492 drm_framebuffer_reference(fb); 493 494 dev->mode_config.num_fb++; 495 list_add(&fb->head, &dev->mode_config.fb_list); 496out: 497 mutex_unlock(&dev->mode_config.fb_lock); 498 499 return 0; 500} 501EXPORT_SYMBOL(drm_framebuffer_init); 502 503static void drm_framebuffer_free(struct kref *kref) 504{ 505 struct drm_framebuffer *fb = 506 container_of(kref, struct drm_framebuffer, refcount); 507 fb->funcs->destroy(fb); 508} 509 510static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev, 511 uint32_t id) 512{ 513 struct drm_mode_object *obj = NULL; 514 struct drm_framebuffer *fb; 515 516 mutex_lock(&dev->mode_config.idr_mutex); 517 obj = idr_find(&dev->mode_config.crtc_idr, id); 518 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id)) 519 fb = NULL; 520 else 521 fb = obj_to_fb(obj); 522 mutex_unlock(&dev->mode_config.idr_mutex); 523 524 return fb; 525} 526 527/** 528 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference 529 * @dev: drm device 530 * @id: id of the fb object 531 * 532 * If successful, this grabs an additional reference to the framebuffer - 533 * callers need to make sure to eventually unreference the returned framebuffer 534 * again, using @drm_framebuffer_unreference. 535 */ 536struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, 537 uint32_t id) 538{ 539 struct drm_framebuffer *fb; 540 541 mutex_lock(&dev->mode_config.fb_lock); 542 fb = __drm_framebuffer_lookup(dev, id); 543 if (fb) 544 drm_framebuffer_reference(fb); 545 mutex_unlock(&dev->mode_config.fb_lock); 546 547 return fb; 548} 549EXPORT_SYMBOL(drm_framebuffer_lookup); 550 551/** 552 * drm_framebuffer_unreference - unref a framebuffer 553 * @fb: framebuffer to unref 554 * 555 * This functions decrements the fb's refcount and frees it if it drops to zero. 556 */ 557void drm_framebuffer_unreference(struct drm_framebuffer *fb) 558{ 559 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 560 kref_put(&fb->refcount, drm_framebuffer_free); 561} 562EXPORT_SYMBOL(drm_framebuffer_unreference); 563 564/** 565 * drm_framebuffer_reference - incr the fb refcnt 566 * @fb: framebuffer 567 * 568 * This functions increments the fb's refcount. 569 */ 570void drm_framebuffer_reference(struct drm_framebuffer *fb) 571{ 572 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 573 kref_get(&fb->refcount); 574} 575EXPORT_SYMBOL(drm_framebuffer_reference); 576 577static void drm_framebuffer_free_bug(struct kref *kref) 578{ 579 BUG(); 580} 581 582static void __drm_framebuffer_unreference(struct drm_framebuffer *fb) 583{ 584 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 585 kref_put(&fb->refcount, drm_framebuffer_free_bug); 586} 587 588/* dev->mode_config.fb_lock must be held! */ 589static void __drm_framebuffer_unregister(struct drm_device *dev, 590 struct drm_framebuffer *fb) 591{ 592 mutex_lock(&dev->mode_config.idr_mutex); 593 idr_remove(&dev->mode_config.crtc_idr, fb->base.id); 594 mutex_unlock(&dev->mode_config.idr_mutex); 595 596 fb->base.id = 0; 597 598 __drm_framebuffer_unreference(fb); 599} 600 601/** 602 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr 603 * @fb: fb to unregister 604 * 605 * Drivers need to call this when cleaning up driver-private framebuffers, e.g. 606 * those used for fbdev. Note that the caller must hold a reference of it's own, 607 * i.e. the object may not be destroyed through this call (since it'll lead to a 608 * locking inversion). 609 */ 610void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) 611{ 612 struct drm_device *dev = fb->dev; 613 614 mutex_lock(&dev->mode_config.fb_lock); 615 /* Mark fb as reaped and drop idr ref. */ 616 __drm_framebuffer_unregister(dev, fb); 617 mutex_unlock(&dev->mode_config.fb_lock); 618} 619EXPORT_SYMBOL(drm_framebuffer_unregister_private); 620 621/** 622 * drm_framebuffer_cleanup - remove a framebuffer object 623 * @fb: framebuffer to remove 624 * 625 * Cleanup framebuffer. This function is intended to be used from the drivers 626 * ->destroy callback. It can also be used to clean up driver private 627 * framebuffers embedded into a larger structure. 628 * 629 * Note that this function does not remove the fb from active usuage - if it is 630 * still used anywhere, hilarity can ensue since userspace could call getfb on 631 * the id and get back -EINVAL. Obviously no concern at driver unload time. 632 * 633 * Also, the framebuffer will not be removed from the lookup idr - for 634 * user-created framebuffers this will happen in in the rmfb ioctl. For 635 * driver-private objects (e.g. for fbdev) drivers need to explicitly call 636 * drm_framebuffer_unregister_private. 637 */ 638void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 639{ 640 struct drm_device *dev = fb->dev; 641 642 mutex_lock(&dev->mode_config.fb_lock); 643 list_del(&fb->head); 644 dev->mode_config.num_fb--; 645 mutex_unlock(&dev->mode_config.fb_lock); 646} 647EXPORT_SYMBOL(drm_framebuffer_cleanup); 648 649/** 650 * drm_framebuffer_remove - remove and unreference a framebuffer object 651 * @fb: framebuffer to remove 652 * 653 * Scans all the CRTCs and planes in @dev's mode_config. If they're 654 * using @fb, removes it, setting it to NULL. Then drops the reference to the 655 * passed-in framebuffer. Might take the modeset locks. 656 * 657 * Note that this function optimizes the cleanup away if the caller holds the 658 * last reference to the framebuffer. It is also guaranteed to not take the 659 * modeset locks in this case. 660 */ 661void drm_framebuffer_remove(struct drm_framebuffer *fb) 662{ 663 struct drm_device *dev = fb->dev; 664 struct drm_crtc *crtc; 665 struct drm_plane *plane; 666 struct drm_mode_set set; 667 int ret; 668 669 WARN_ON(!list_empty(&fb->filp_head)); 670 671 /* 672 * drm ABI mandates that we remove any deleted framebuffers from active 673 * useage. But since most sane clients only remove framebuffers they no 674 * longer need, try to optimize this away. 675 * 676 * Since we're holding a reference ourselves, observing a refcount of 1 677 * means that we're the last holder and can skip it. Also, the refcount 678 * can never increase from 1 again, so we don't need any barriers or 679 * locks. 680 * 681 * Note that userspace could try to race with use and instate a new 682 * usage _after_ we've cleared all current ones. End result will be an 683 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot 684 * in this manner. 685 */ 686 if (atomic_read(&fb->refcount.refcount) > 1) { 687 drm_modeset_lock_all(dev); 688 /* remove from any CRTC */ 689 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 690 if (crtc->primary->fb == fb) { 691 /* should turn off the crtc */ 692 memset(&set, 0, sizeof(struct drm_mode_set)); 693 set.crtc = crtc; 694 set.fb = NULL; 695 ret = drm_mode_set_config_internal(&set); 696 if (ret) 697 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); 698 } 699 } 700 701 list_for_each_entry(plane, &dev->mode_config.plane_list, head) { 702 if (plane->fb == fb) 703 drm_plane_force_disable(plane); 704 } 705 drm_modeset_unlock_all(dev); 706 } 707 708 drm_framebuffer_unreference(fb); 709} 710EXPORT_SYMBOL(drm_framebuffer_remove); 711 712DEFINE_WW_CLASS(crtc_ww_class); 713 714/** 715 * drm_crtc_init_with_planes - Initialise a new CRTC object with 716 * specified primary and cursor planes. 717 * @dev: DRM device 718 * @crtc: CRTC object to init 719 * @primary: Primary plane for CRTC 720 * @cursor: Cursor plane for CRTC 721 * @funcs: callbacks for the new CRTC 722 * 723 * Inits a new object created as base part of a driver crtc object. 724 * 725 * Returns: 726 * Zero on success, error code on failure. 727 */ 728int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 729 struct drm_plane *primary, 730 void *cursor, 731 const struct drm_crtc_funcs *funcs) 732{ 733 struct drm_mode_config *config = &dev->mode_config; 734 int ret; 735 736 crtc->dev = dev; 737 crtc->funcs = funcs; 738 crtc->invert_dimensions = false; 739 740 drm_modeset_lock_all(dev); 741 drm_modeset_lock_init(&crtc->mutex); 742 /* dropped by _unlock_all(): */ 743 drm_modeset_lock(&crtc->mutex, config->acquire_ctx); 744 745 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 746 if (ret) 747 goto out; 748 749 crtc->base.properties = &crtc->properties; 750 751 list_add_tail(&crtc->head, &config->crtc_list); 752 config->num_crtc++; 753 754 crtc->primary = primary; 755 if (primary) 756 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 757 758 out: 759 drm_modeset_unlock_all(dev); 760 761 return ret; 762} 763EXPORT_SYMBOL(drm_crtc_init_with_planes); 764 765/** 766 * drm_crtc_cleanup - Clean up the core crtc usage 767 * @crtc: CRTC to cleanup 768 * 769 * This function cleans up @crtc and removes it from the DRM mode setting 770 * core. Note that the function does *not* free the crtc structure itself, 771 * this is the responsibility of the caller. 772 */ 773void drm_crtc_cleanup(struct drm_crtc *crtc) 774{ 775 struct drm_device *dev = crtc->dev; 776 777 kfree(crtc->gamma_store); 778 crtc->gamma_store = NULL; 779 780 drm_modeset_lock_fini(&crtc->mutex); 781 782 drm_mode_object_put(dev, &crtc->base); 783 list_del(&crtc->head); 784 dev->mode_config.num_crtc--; 785} 786EXPORT_SYMBOL(drm_crtc_cleanup); 787 788/** 789 * drm_crtc_index - find the index of a registered CRTC 790 * @crtc: CRTC to find index for 791 * 792 * Given a registered CRTC, return the index of that CRTC within a DRM 793 * device's list of CRTCs. 794 */ 795unsigned int drm_crtc_index(struct drm_crtc *crtc) 796{ 797 unsigned int index = 0; 798 struct drm_crtc *tmp; 799 800 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { 801 if (tmp == crtc) 802 return index; 803 804 index++; 805 } 806 807 BUG(); 808} 809EXPORT_SYMBOL(drm_crtc_index); 810 811/* 812 * drm_mode_remove - remove and free a mode 813 * @connector: connector list to modify 814 * @mode: mode to remove 815 * 816 * Remove @mode from @connector's mode list, then free it. 817 */ 818static void drm_mode_remove(struct drm_connector *connector, 819 struct drm_display_mode *mode) 820{ 821 list_del(&mode->head); 822 drm_mode_destroy(connector->dev, mode); 823} 824 825/** 826 * drm_connector_init - Init a preallocated connector 827 * @dev: DRM device 828 * @connector: the connector to init 829 * @funcs: callbacks for this connector 830 * @connector_type: user visible type of the connector 831 * 832 * Initialises a preallocated connector. Connectors should be 833 * subclassed as part of driver connector objects. 834 * 835 * Returns: 836 * Zero on success, error code on failure. 837 */ 838int drm_connector_init(struct drm_device *dev, 839 struct drm_connector *connector, 840 const struct drm_connector_funcs *funcs, 841 int connector_type) 842{ 843 int ret; 844 struct ida *connector_ida = 845 &drm_connector_enum_list[connector_type].ida; 846 847 drm_modeset_lock_all(dev); 848 849 ret = drm_mode_object_get(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR); 850 if (ret) 851 goto out_unlock; 852 853 connector->base.properties = &connector->properties; 854 connector->dev = dev; 855 connector->funcs = funcs; 856 connector->connector_type = connector_type; 857 connector->connector_type_id = 858 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); 859 if (connector->connector_type_id < 0) { 860 ret = connector->connector_type_id; 861 goto out_put; 862 } 863 connector->name = 864 kasprintf(GFP_KERNEL, "%s-%d", 865 drm_connector_enum_list[connector_type].name, 866 connector->connector_type_id); 867 if (!connector->name) { 868 ret = -ENOMEM; 869 goto out_put; 870 } 871 872 INIT_LIST_HEAD(&connector->probed_modes); 873 INIT_LIST_HEAD(&connector->modes); 874 connector->edid_blob_ptr = NULL; 875 connector->status = connector_status_unknown; 876 877 list_add_tail(&connector->head, &dev->mode_config.connector_list); 878 dev->mode_config.num_connector++; 879 880 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 881 drm_object_attach_property(&connector->base, 882 dev->mode_config.edid_property, 883 0); 884 885 drm_object_attach_property(&connector->base, 886 dev->mode_config.dpms_property, 0); 887 888out_put: 889 if (ret) 890 drm_mode_object_put(dev, &connector->base); 891 892out_unlock: 893 drm_modeset_unlock_all(dev); 894 895 return ret; 896} 897EXPORT_SYMBOL(drm_connector_init); 898 899/** 900 * drm_connector_cleanup - cleans up an initialised connector 901 * @connector: connector to cleanup 902 * 903 * Cleans up the connector but doesn't free the object. 904 */ 905void drm_connector_cleanup(struct drm_connector *connector) 906{ 907 struct drm_device *dev = connector->dev; 908 struct drm_display_mode *mode, *t; 909 910 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 911 drm_mode_remove(connector, mode); 912 913 list_for_each_entry_safe(mode, t, &connector->modes, head) 914 drm_mode_remove(connector, mode); 915 916 ida_remove(&drm_connector_enum_list[connector->connector_type].ida, 917 connector->connector_type_id); 918 919 drm_mode_object_put(dev, &connector->base); 920 kfree(connector->name); 921 connector->name = NULL; 922 list_del(&connector->head); 923 dev->mode_config.num_connector--; 924} 925EXPORT_SYMBOL(drm_connector_cleanup); 926 927/** 928 * drm_connector_unplug_all - unregister connector userspace interfaces 929 * @dev: drm device 930 * 931 * This function unregisters all connector userspace interfaces in sysfs. Should 932 * be call when the device is disconnected, e.g. from an usb driver's 933 * ->disconnect callback. 934 */ 935void drm_connector_unplug_all(struct drm_device *dev) 936{ 937 struct drm_connector *connector; 938 939 /* taking the mode config mutex ends up in a clash with sysfs */ 940 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 941 drm_sysfs_connector_remove(connector); 942 943} 944EXPORT_SYMBOL(drm_connector_unplug_all); 945 946/** 947 * drm_bridge_init - initialize a drm transcoder/bridge 948 * @dev: drm device 949 * @bridge: transcoder/bridge to set up 950 * @funcs: bridge function table 951 * 952 * Initialises a preallocated bridge. Bridges should be 953 * subclassed as part of driver connector objects. 954 * 955 * Returns: 956 * Zero on success, error code on failure. 957 */ 958int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge, 959 const struct drm_bridge_funcs *funcs) 960{ 961 int ret; 962 963 drm_modeset_lock_all(dev); 964 965 ret = drm_mode_object_get(dev, &bridge->base, DRM_MODE_OBJECT_BRIDGE); 966 if (ret) 967 goto out; 968 969 bridge->dev = dev; 970 bridge->funcs = funcs; 971 972 list_add_tail(&bridge->head, &dev->mode_config.bridge_list); 973 dev->mode_config.num_bridge++; 974 975 out: 976 drm_modeset_unlock_all(dev); 977 return ret; 978} 979EXPORT_SYMBOL(drm_bridge_init); 980 981/** 982 * drm_bridge_cleanup - cleans up an initialised bridge 983 * @bridge: bridge to cleanup 984 * 985 * Cleans up the bridge but doesn't free the object. 986 */ 987void drm_bridge_cleanup(struct drm_bridge *bridge) 988{ 989 struct drm_device *dev = bridge->dev; 990 991 drm_modeset_lock_all(dev); 992 drm_mode_object_put(dev, &bridge->base); 993 list_del(&bridge->head); 994 dev->mode_config.num_bridge--; 995 drm_modeset_unlock_all(dev); 996} 997EXPORT_SYMBOL(drm_bridge_cleanup); 998 999/** 1000 * drm_encoder_init - Init a preallocated encoder 1001 * @dev: drm device 1002 * @encoder: the encoder to init 1003 * @funcs: callbacks for this encoder 1004 * @encoder_type: user visible type of the encoder 1005 * 1006 * Initialises a preallocated encoder. Encoder should be 1007 * subclassed as part of driver encoder objects. 1008 * 1009 * Returns: 1010 * Zero on success, error code on failure. 1011 */ 1012int drm_encoder_init(struct drm_device *dev, 1013 struct drm_encoder *encoder, 1014 const struct drm_encoder_funcs *funcs, 1015 int encoder_type) 1016{ 1017 int ret; 1018 1019 drm_modeset_lock_all(dev); 1020 1021 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1022 if (ret) 1023 goto out_unlock; 1024 1025 encoder->dev = dev; 1026 encoder->encoder_type = encoder_type; 1027 encoder->funcs = funcs; 1028 encoder->name = kasprintf(GFP_KERNEL, "%s-%d", 1029 drm_encoder_enum_list[encoder_type].name, 1030 encoder->base.id); 1031 if (!encoder->name) { 1032 ret = -ENOMEM; 1033 goto out_put; 1034 } 1035 1036 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1037 dev->mode_config.num_encoder++; 1038 1039out_put: 1040 if (ret) 1041 drm_mode_object_put(dev, &encoder->base); 1042 1043out_unlock: 1044 drm_modeset_unlock_all(dev); 1045 1046 return ret; 1047} 1048EXPORT_SYMBOL(drm_encoder_init); 1049 1050/** 1051 * drm_encoder_cleanup - cleans up an initialised encoder 1052 * @encoder: encoder to cleanup 1053 * 1054 * Cleans up the encoder but doesn't free the object. 1055 */ 1056void drm_encoder_cleanup(struct drm_encoder *encoder) 1057{ 1058 struct drm_device *dev = encoder->dev; 1059 drm_modeset_lock_all(dev); 1060 drm_mode_object_put(dev, &encoder->base); 1061 kfree(encoder->name); 1062 encoder->name = NULL; 1063 list_del(&encoder->head); 1064 dev->mode_config.num_encoder--; 1065 drm_modeset_unlock_all(dev); 1066} 1067EXPORT_SYMBOL(drm_encoder_cleanup); 1068 1069/** 1070 * drm_universal_plane_init - Initialize a new universal plane object 1071 * @dev: DRM device 1072 * @plane: plane object to init 1073 * @possible_crtcs: bitmask of possible CRTCs 1074 * @funcs: callbacks for the new plane 1075 * @formats: array of supported formats (%DRM_FORMAT_*) 1076 * @format_count: number of elements in @formats 1077 * @type: type of plane (overlay, primary, cursor) 1078 * 1079 * Initializes a plane object of type @type. 1080 * 1081 * Returns: 1082 * Zero on success, error code on failure. 1083 */ 1084int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1085 unsigned long possible_crtcs, 1086 const struct drm_plane_funcs *funcs, 1087 const uint32_t *formats, uint32_t format_count, 1088 enum drm_plane_type type) 1089{ 1090 int ret; 1091 1092 drm_modeset_lock_all(dev); 1093 1094 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1095 if (ret) 1096 goto out; 1097 1098 plane->base.properties = &plane->properties; 1099 plane->dev = dev; 1100 plane->funcs = funcs; 1101 plane->format_types = kmalloc(sizeof(uint32_t) * format_count, 1102 GFP_KERNEL); 1103 if (!plane->format_types) { 1104 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1105 drm_mode_object_put(dev, &plane->base); 1106 ret = -ENOMEM; 1107 goto out; 1108 } 1109 1110 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1111 plane->format_count = format_count; 1112 plane->possible_crtcs = possible_crtcs; 1113 plane->type = type; 1114 1115 list_add_tail(&plane->head, &dev->mode_config.plane_list); 1116 dev->mode_config.num_total_plane++; 1117 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1118 dev->mode_config.num_overlay_plane++; 1119 1120 drm_object_attach_property(&plane->base, 1121 dev->mode_config.plane_type_property, 1122 plane->type); 1123 1124 out: 1125 drm_modeset_unlock_all(dev); 1126 1127 return ret; 1128} 1129EXPORT_SYMBOL(drm_universal_plane_init); 1130 1131/** 1132 * drm_plane_init - Initialize a legacy plane 1133 * @dev: DRM device 1134 * @plane: plane object to init 1135 * @possible_crtcs: bitmask of possible CRTCs 1136 * @funcs: callbacks for the new plane 1137 * @formats: array of supported formats (%DRM_FORMAT_*) 1138 * @format_count: number of elements in @formats 1139 * @is_primary: plane type (primary vs overlay) 1140 * 1141 * Legacy API to initialize a DRM plane. 1142 * 1143 * New drivers should call drm_universal_plane_init() instead. 1144 * 1145 * Returns: 1146 * Zero on success, error code on failure. 1147 */ 1148int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1149 unsigned long possible_crtcs, 1150 const struct drm_plane_funcs *funcs, 1151 const uint32_t *formats, uint32_t format_count, 1152 bool is_primary) 1153{ 1154 enum drm_plane_type type; 1155 1156 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1157 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1158 formats, format_count, type); 1159} 1160EXPORT_SYMBOL(drm_plane_init); 1161 1162/** 1163 * drm_plane_cleanup - Clean up the core plane usage 1164 * @plane: plane to cleanup 1165 * 1166 * This function cleans up @plane and removes it from the DRM mode setting 1167 * core. Note that the function does *not* free the plane structure itself, 1168 * this is the responsibility of the caller. 1169 */ 1170void drm_plane_cleanup(struct drm_plane *plane) 1171{ 1172 struct drm_device *dev = plane->dev; 1173 1174 drm_modeset_lock_all(dev); 1175 kfree(plane->format_types); 1176 drm_mode_object_put(dev, &plane->base); 1177 1178 BUG_ON(list_empty(&plane->head)); 1179 1180 list_del(&plane->head); 1181 dev->mode_config.num_total_plane--; 1182 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1183 dev->mode_config.num_overlay_plane--; 1184 drm_modeset_unlock_all(dev); 1185} 1186EXPORT_SYMBOL(drm_plane_cleanup); 1187 1188/** 1189 * drm_plane_force_disable - Forcibly disable a plane 1190 * @plane: plane to disable 1191 * 1192 * Forces the plane to be disabled. 1193 * 1194 * Used when the plane's current framebuffer is destroyed, 1195 * and when restoring fbdev mode. 1196 */ 1197void drm_plane_force_disable(struct drm_plane *plane) 1198{ 1199 struct drm_framebuffer *old_fb = plane->fb; 1200 int ret; 1201 1202 if (!old_fb) 1203 return; 1204 1205 ret = plane->funcs->disable_plane(plane); 1206 if (ret) { 1207 DRM_ERROR("failed to disable plane with busy fb\n"); 1208 return; 1209 } 1210 /* disconnect the plane from the fb and crtc: */ 1211 __drm_framebuffer_unreference(old_fb); 1212 plane->fb = NULL; 1213 plane->crtc = NULL; 1214} 1215EXPORT_SYMBOL(drm_plane_force_disable); 1216 1217static int drm_mode_create_standard_connector_properties(struct drm_device *dev) 1218{ 1219 struct drm_property *edid; 1220 struct drm_property *dpms; 1221 1222 /* 1223 * Standard properties (apply to all connectors) 1224 */ 1225 edid = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1226 DRM_MODE_PROP_IMMUTABLE, 1227 "EDID", 0); 1228 dev->mode_config.edid_property = edid; 1229 1230 dpms = drm_property_create_enum(dev, 0, 1231 "DPMS", drm_dpms_enum_list, 1232 ARRAY_SIZE(drm_dpms_enum_list)); 1233 dev->mode_config.dpms_property = dpms; 1234 1235 return 0; 1236} 1237 1238static int drm_mode_create_standard_plane_properties(struct drm_device *dev) 1239{ 1240 struct drm_property *type; 1241 1242 /* 1243 * Standard properties (apply to all planes) 1244 */ 1245 type = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1246 "type", drm_plane_type_enum_list, 1247 ARRAY_SIZE(drm_plane_type_enum_list)); 1248 dev->mode_config.plane_type_property = type; 1249 1250 return 0; 1251} 1252 1253/** 1254 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1255 * @dev: DRM device 1256 * 1257 * Called by a driver the first time a DVI-I connector is made. 1258 */ 1259int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1260{ 1261 struct drm_property *dvi_i_selector; 1262 struct drm_property *dvi_i_subconnector; 1263 1264 if (dev->mode_config.dvi_i_select_subconnector_property) 1265 return 0; 1266 1267 dvi_i_selector = 1268 drm_property_create_enum(dev, 0, 1269 "select subconnector", 1270 drm_dvi_i_select_enum_list, 1271 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1272 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1273 1274 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1275 "subconnector", 1276 drm_dvi_i_subconnector_enum_list, 1277 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1278 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1279 1280 return 0; 1281} 1282EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1283 1284/** 1285 * drm_create_tv_properties - create TV specific connector properties 1286 * @dev: DRM device 1287 * @num_modes: number of different TV formats (modes) supported 1288 * @modes: array of pointers to strings containing name of each format 1289 * 1290 * Called by a driver's TV initialization routine, this function creates 1291 * the TV specific connector properties for a given device. Caller is 1292 * responsible for allocating a list of format names and passing them to 1293 * this routine. 1294 */ 1295int drm_mode_create_tv_properties(struct drm_device *dev, int num_modes, 1296 char *modes[]) 1297{ 1298 struct drm_property *tv_selector; 1299 struct drm_property *tv_subconnector; 1300 int i; 1301 1302 if (dev->mode_config.tv_select_subconnector_property) 1303 return 0; 1304 1305 /* 1306 * Basic connector properties 1307 */ 1308 tv_selector = drm_property_create_enum(dev, 0, 1309 "select subconnector", 1310 drm_tv_select_enum_list, 1311 ARRAY_SIZE(drm_tv_select_enum_list)); 1312 dev->mode_config.tv_select_subconnector_property = tv_selector; 1313 1314 tv_subconnector = 1315 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1316 "subconnector", 1317 drm_tv_subconnector_enum_list, 1318 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1319 dev->mode_config.tv_subconnector_property = tv_subconnector; 1320 1321 /* 1322 * Other, TV specific properties: margins & TV modes. 1323 */ 1324 dev->mode_config.tv_left_margin_property = 1325 drm_property_create_range(dev, 0, "left margin", 0, 100); 1326 1327 dev->mode_config.tv_right_margin_property = 1328 drm_property_create_range(dev, 0, "right margin", 0, 100); 1329 1330 dev->mode_config.tv_top_margin_property = 1331 drm_property_create_range(dev, 0, "top margin", 0, 100); 1332 1333 dev->mode_config.tv_bottom_margin_property = 1334 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1335 1336 dev->mode_config.tv_mode_property = 1337 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1338 "mode", num_modes); 1339 for (i = 0; i < num_modes; i++) 1340 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1341 i, modes[i]); 1342 1343 dev->mode_config.tv_brightness_property = 1344 drm_property_create_range(dev, 0, "brightness", 0, 100); 1345 1346 dev->mode_config.tv_contrast_property = 1347 drm_property_create_range(dev, 0, "contrast", 0, 100); 1348 1349 dev->mode_config.tv_flicker_reduction_property = 1350 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1351 1352 dev->mode_config.tv_overscan_property = 1353 drm_property_create_range(dev, 0, "overscan", 0, 100); 1354 1355 dev->mode_config.tv_saturation_property = 1356 drm_property_create_range(dev, 0, "saturation", 0, 100); 1357 1358 dev->mode_config.tv_hue_property = 1359 drm_property_create_range(dev, 0, "hue", 0, 100); 1360 1361 return 0; 1362} 1363EXPORT_SYMBOL(drm_mode_create_tv_properties); 1364 1365/** 1366 * drm_mode_create_scaling_mode_property - create scaling mode property 1367 * @dev: DRM device 1368 * 1369 * Called by a driver the first time it's needed, must be attached to desired 1370 * connectors. 1371 */ 1372int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1373{ 1374 struct drm_property *scaling_mode; 1375 1376 if (dev->mode_config.scaling_mode_property) 1377 return 0; 1378 1379 scaling_mode = 1380 drm_property_create_enum(dev, 0, "scaling mode", 1381 drm_scaling_mode_enum_list, 1382 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1383 1384 dev->mode_config.scaling_mode_property = scaling_mode; 1385 1386 return 0; 1387} 1388EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1389 1390/** 1391 * drm_mode_create_dirty_property - create dirty property 1392 * @dev: DRM device 1393 * 1394 * Called by a driver the first time it's needed, must be attached to desired 1395 * connectors. 1396 */ 1397int drm_mode_create_dirty_info_property(struct drm_device *dev) 1398{ 1399 struct drm_property *dirty_info; 1400 1401 if (dev->mode_config.dirty_info_property) 1402 return 0; 1403 1404 dirty_info = 1405 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1406 "dirty", 1407 drm_dirty_info_enum_list, 1408 ARRAY_SIZE(drm_dirty_info_enum_list)); 1409 dev->mode_config.dirty_info_property = dirty_info; 1410 1411 return 0; 1412} 1413EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1414 1415static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group) 1416{ 1417 uint32_t total_objects = 0; 1418 1419 total_objects += dev->mode_config.num_crtc; 1420 total_objects += dev->mode_config.num_connector; 1421 total_objects += dev->mode_config.num_encoder; 1422 total_objects += dev->mode_config.num_bridge; 1423 1424 group->id_list = kzalloc(total_objects * sizeof(uint32_t), GFP_KERNEL); 1425 if (!group->id_list) 1426 return -ENOMEM; 1427 1428 group->num_crtcs = 0; 1429 group->num_connectors = 0; 1430 group->num_encoders = 0; 1431 group->num_bridges = 0; 1432 return 0; 1433} 1434 1435void drm_mode_group_destroy(struct drm_mode_group *group) 1436{ 1437 kfree(group->id_list); 1438 group->id_list = NULL; 1439} 1440 1441/* 1442 * NOTE: Driver's shouldn't ever call drm_mode_group_init_legacy_group - it is 1443 * the drm core's responsibility to set up mode control groups. 1444 */ 1445int drm_mode_group_init_legacy_group(struct drm_device *dev, 1446 struct drm_mode_group *group) 1447{ 1448 struct drm_crtc *crtc; 1449 struct drm_encoder *encoder; 1450 struct drm_connector *connector; 1451 struct drm_bridge *bridge; 1452 int ret; 1453 1454 if ((ret = drm_mode_group_init(dev, group))) 1455 return ret; 1456 1457 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 1458 group->id_list[group->num_crtcs++] = crtc->base.id; 1459 1460 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 1461 group->id_list[group->num_crtcs + group->num_encoders++] = 1462 encoder->base.id; 1463 1464 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1465 group->id_list[group->num_crtcs + group->num_encoders + 1466 group->num_connectors++] = connector->base.id; 1467 1468 list_for_each_entry(bridge, &dev->mode_config.bridge_list, head) 1469 group->id_list[group->num_crtcs + group->num_encoders + 1470 group->num_connectors + group->num_bridges++] = 1471 bridge->base.id; 1472 1473 return 0; 1474} 1475EXPORT_SYMBOL(drm_mode_group_init_legacy_group); 1476 1477/** 1478 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1479 * @out: drm_mode_modeinfo struct to return to the user 1480 * @in: drm_display_mode to use 1481 * 1482 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1483 * the user. 1484 */ 1485static void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out, 1486 const struct drm_display_mode *in) 1487{ 1488 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || 1489 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || 1490 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || 1491 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || 1492 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, 1493 "timing values too large for mode info\n"); 1494 1495 out->clock = in->clock; 1496 out->hdisplay = in->hdisplay; 1497 out->hsync_start = in->hsync_start; 1498 out->hsync_end = in->hsync_end; 1499 out->htotal = in->htotal; 1500 out->hskew = in->hskew; 1501 out->vdisplay = in->vdisplay; 1502 out->vsync_start = in->vsync_start; 1503 out->vsync_end = in->vsync_end; 1504 out->vtotal = in->vtotal; 1505 out->vscan = in->vscan; 1506 out->vrefresh = in->vrefresh; 1507 out->flags = in->flags; 1508 out->type = in->type; 1509 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1510 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1511} 1512 1513/** 1514 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 1515 * @out: drm_display_mode to return to the user 1516 * @in: drm_mode_modeinfo to use 1517 * 1518 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 1519 * the caller. 1520 * 1521 * Returns: 1522 * Zero on success, errno on failure. 1523 */ 1524static int drm_crtc_convert_umode(struct drm_display_mode *out, 1525 const struct drm_mode_modeinfo *in) 1526{ 1527 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) 1528 return -ERANGE; 1529 1530 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1531 return -EINVAL; 1532 1533 out->clock = in->clock; 1534 out->hdisplay = in->hdisplay; 1535 out->hsync_start = in->hsync_start; 1536 out->hsync_end = in->hsync_end; 1537 out->htotal = in->htotal; 1538 out->hskew = in->hskew; 1539 out->vdisplay = in->vdisplay; 1540 out->vsync_start = in->vsync_start; 1541 out->vsync_end = in->vsync_end; 1542 out->vtotal = in->vtotal; 1543 out->vscan = in->vscan; 1544 out->vrefresh = in->vrefresh; 1545 out->flags = in->flags; 1546 out->type = in->type; 1547 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1548 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1549 1550 return 0; 1551} 1552 1553/** 1554 * drm_mode_getresources - get graphics configuration 1555 * @dev: drm device for the ioctl 1556 * @data: data pointer for the ioctl 1557 * @file_priv: drm file for the ioctl call 1558 * 1559 * Construct a set of configuration description structures and return 1560 * them to the user, including CRTC, connector and framebuffer configuration. 1561 * 1562 * Called by the user via ioctl. 1563 * 1564 * Returns: 1565 * Zero on success, errno on failure. 1566 */ 1567int drm_mode_getresources(struct drm_device *dev, void *data, 1568 struct drm_file *file_priv) 1569{ 1570 struct drm_mode_card_res *card_res = data; 1571 struct list_head *lh; 1572 struct drm_framebuffer *fb; 1573 struct drm_connector *connector; 1574 struct drm_crtc *crtc; 1575 struct drm_encoder *encoder; 1576 int ret = 0; 1577 int connector_count = 0; 1578 int crtc_count = 0; 1579 int fb_count = 0; 1580 int encoder_count = 0; 1581 int copied = 0, i; 1582 uint32_t __user *fb_id; 1583 uint32_t __user *crtc_id; 1584 uint32_t __user *connector_id; 1585 uint32_t __user *encoder_id; 1586 struct drm_mode_group *mode_group; 1587 1588 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1589 return -EINVAL; 1590 1591 1592 mutex_lock(&file_priv->fbs_lock); 1593 /* 1594 * For the non-control nodes we need to limit the list of resources 1595 * by IDs in the group list for this node 1596 */ 1597 list_for_each(lh, &file_priv->fbs) 1598 fb_count++; 1599 1600 /* handle this in 4 parts */ 1601 /* FBs */ 1602 if (card_res->count_fbs >= fb_count) { 1603 copied = 0; 1604 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1605 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1606 if (put_user(fb->base.id, fb_id + copied)) { 1607 mutex_unlock(&file_priv->fbs_lock); 1608 return -EFAULT; 1609 } 1610 copied++; 1611 } 1612 } 1613 card_res->count_fbs = fb_count; 1614 mutex_unlock(&file_priv->fbs_lock); 1615 1616 drm_modeset_lock_all(dev); 1617 if (!drm_is_primary_client(file_priv)) { 1618 1619 mode_group = NULL; 1620 list_for_each(lh, &dev->mode_config.crtc_list) 1621 crtc_count++; 1622 1623 list_for_each(lh, &dev->mode_config.connector_list) 1624 connector_count++; 1625 1626 list_for_each(lh, &dev->mode_config.encoder_list) 1627 encoder_count++; 1628 } else { 1629 1630 mode_group = &file_priv->master->minor->mode_group; 1631 crtc_count = mode_group->num_crtcs; 1632 connector_count = mode_group->num_connectors; 1633 encoder_count = mode_group->num_encoders; 1634 } 1635 1636 card_res->max_height = dev->mode_config.max_height; 1637 card_res->min_height = dev->mode_config.min_height; 1638 card_res->max_width = dev->mode_config.max_width; 1639 card_res->min_width = dev->mode_config.min_width; 1640 1641 /* CRTCs */ 1642 if (card_res->count_crtcs >= crtc_count) { 1643 copied = 0; 1644 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1645 if (!mode_group) { 1646 list_for_each_entry(crtc, &dev->mode_config.crtc_list, 1647 head) { 1648 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 1649 if (put_user(crtc->base.id, crtc_id + copied)) { 1650 ret = -EFAULT; 1651 goto out; 1652 } 1653 copied++; 1654 } 1655 } else { 1656 for (i = 0; i < mode_group->num_crtcs; i++) { 1657 if (put_user(mode_group->id_list[i], 1658 crtc_id + copied)) { 1659 ret = -EFAULT; 1660 goto out; 1661 } 1662 copied++; 1663 } 1664 } 1665 } 1666 card_res->count_crtcs = crtc_count; 1667 1668 /* Encoders */ 1669 if (card_res->count_encoders >= encoder_count) { 1670 copied = 0; 1671 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1672 if (!mode_group) { 1673 list_for_each_entry(encoder, 1674 &dev->mode_config.encoder_list, 1675 head) { 1676 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1677 encoder->name); 1678 if (put_user(encoder->base.id, encoder_id + 1679 copied)) { 1680 ret = -EFAULT; 1681 goto out; 1682 } 1683 copied++; 1684 } 1685 } else { 1686 for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) { 1687 if (put_user(mode_group->id_list[i], 1688 encoder_id + copied)) { 1689 ret = -EFAULT; 1690 goto out; 1691 } 1692 copied++; 1693 } 1694 1695 } 1696 } 1697 card_res->count_encoders = encoder_count; 1698 1699 /* Connectors */ 1700 if (card_res->count_connectors >= connector_count) { 1701 copied = 0; 1702 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1703 if (!mode_group) { 1704 list_for_each_entry(connector, 1705 &dev->mode_config.connector_list, 1706 head) { 1707 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1708 connector->base.id, 1709 connector->name); 1710 if (put_user(connector->base.id, 1711 connector_id + copied)) { 1712 ret = -EFAULT; 1713 goto out; 1714 } 1715 copied++; 1716 } 1717 } else { 1718 int start = mode_group->num_crtcs + 1719 mode_group->num_encoders; 1720 for (i = start; i < start + mode_group->num_connectors; i++) { 1721 if (put_user(mode_group->id_list[i], 1722 connector_id + copied)) { 1723 ret = -EFAULT; 1724 goto out; 1725 } 1726 copied++; 1727 } 1728 } 1729 } 1730 card_res->count_connectors = connector_count; 1731 1732 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1733 card_res->count_connectors, card_res->count_encoders); 1734 1735out: 1736 drm_modeset_unlock_all(dev); 1737 return ret; 1738} 1739 1740/** 1741 * drm_mode_getcrtc - get CRTC configuration 1742 * @dev: drm device for the ioctl 1743 * @data: data pointer for the ioctl 1744 * @file_priv: drm file for the ioctl call 1745 * 1746 * Construct a CRTC configuration structure to return to the user. 1747 * 1748 * Called by the user via ioctl. 1749 * 1750 * Returns: 1751 * Zero on success, errno on failure. 1752 */ 1753int drm_mode_getcrtc(struct drm_device *dev, 1754 void *data, struct drm_file *file_priv) 1755{ 1756 struct drm_mode_crtc *crtc_resp = data; 1757 struct drm_crtc *crtc; 1758 int ret = 0; 1759 1760 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1761 return -EINVAL; 1762 1763 drm_modeset_lock_all(dev); 1764 1765 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 1766 if (!crtc) { 1767 ret = -ENOENT; 1768 goto out; 1769 } 1770 1771 crtc_resp->x = crtc->x; 1772 crtc_resp->y = crtc->y; 1773 crtc_resp->gamma_size = crtc->gamma_size; 1774 if (crtc->primary->fb) 1775 crtc_resp->fb_id = crtc->primary->fb->base.id; 1776 else 1777 crtc_resp->fb_id = 0; 1778 1779 if (crtc->enabled) { 1780 1781 drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->mode); 1782 crtc_resp->mode_valid = 1; 1783 1784 } else { 1785 crtc_resp->mode_valid = 0; 1786 } 1787 1788out: 1789 drm_modeset_unlock_all(dev); 1790 return ret; 1791} 1792 1793static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 1794 const struct drm_file *file_priv) 1795{ 1796 /* 1797 * If user-space hasn't configured the driver to expose the stereo 3D 1798 * modes, don't expose them. 1799 */ 1800 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 1801 return false; 1802 1803 return true; 1804} 1805 1806/** 1807 * drm_mode_getconnector - get connector configuration 1808 * @dev: drm device for the ioctl 1809 * @data: data pointer for the ioctl 1810 * @file_priv: drm file for the ioctl call 1811 * 1812 * Construct a connector configuration structure to return to the user. 1813 * 1814 * Called by the user via ioctl. 1815 * 1816 * Returns: 1817 * Zero on success, errno on failure. 1818 */ 1819int drm_mode_getconnector(struct drm_device *dev, void *data, 1820 struct drm_file *file_priv) 1821{ 1822 struct drm_mode_get_connector *out_resp = data; 1823 struct drm_connector *connector; 1824 struct drm_display_mode *mode; 1825 int mode_count = 0; 1826 int props_count = 0; 1827 int encoders_count = 0; 1828 int ret = 0; 1829 int copied = 0; 1830 int i; 1831 struct drm_mode_modeinfo u_mode; 1832 struct drm_mode_modeinfo __user *mode_ptr; 1833 uint32_t __user *prop_ptr; 1834 uint64_t __user *prop_values; 1835 uint32_t __user *encoder_ptr; 1836 1837 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1838 return -EINVAL; 1839 1840 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 1841 1842 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 1843 1844 mutex_lock(&dev->mode_config.mutex); 1845 1846 connector = drm_connector_find(dev, out_resp->connector_id); 1847 if (!connector) { 1848 ret = -ENOENT; 1849 goto out; 1850 } 1851 1852 props_count = connector->properties.count; 1853 1854 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 1855 if (connector->encoder_ids[i] != 0) { 1856 encoders_count++; 1857 } 1858 } 1859 1860 if (out_resp->count_modes == 0) { 1861 connector->funcs->fill_modes(connector, 1862 dev->mode_config.max_width, 1863 dev->mode_config.max_height); 1864 } 1865 1866 /* delayed so we get modes regardless of pre-fill_modes state */ 1867 list_for_each_entry(mode, &connector->modes, head) 1868 if (drm_mode_expose_to_userspace(mode, file_priv)) 1869 mode_count++; 1870 1871 out_resp->connector_id = connector->base.id; 1872 out_resp->connector_type = connector->connector_type; 1873 out_resp->connector_type_id = connector->connector_type_id; 1874 out_resp->mm_width = connector->display_info.width_mm; 1875 out_resp->mm_height = connector->display_info.height_mm; 1876 out_resp->subpixel = connector->display_info.subpixel_order; 1877 out_resp->connection = connector->status; 1878 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 1879 if (connector->encoder) 1880 out_resp->encoder_id = connector->encoder->base.id; 1881 else 1882 out_resp->encoder_id = 0; 1883 drm_modeset_unlock(&dev->mode_config.connection_mutex); 1884 1885 /* 1886 * This ioctl is called twice, once to determine how much space is 1887 * needed, and the 2nd time to fill it. 1888 */ 1889 if ((out_resp->count_modes >= mode_count) && mode_count) { 1890 copied = 0; 1891 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 1892 list_for_each_entry(mode, &connector->modes, head) { 1893 if (!drm_mode_expose_to_userspace(mode, file_priv)) 1894 continue; 1895 1896 drm_crtc_convert_to_umode(&u_mode, mode); 1897 if (copy_to_user(mode_ptr + copied, 1898 &u_mode, sizeof(u_mode))) { 1899 ret = -EFAULT; 1900 goto out; 1901 } 1902 copied++; 1903 } 1904 } 1905 out_resp->count_modes = mode_count; 1906 1907 if ((out_resp->count_props >= props_count) && props_count) { 1908 copied = 0; 1909 prop_ptr = (uint32_t __user *)(unsigned long)(out_resp->props_ptr); 1910 prop_values = (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr); 1911 for (i = 0; i < connector->properties.count; i++) { 1912 if (put_user(connector->properties.ids[i], 1913 prop_ptr + copied)) { 1914 ret = -EFAULT; 1915 goto out; 1916 } 1917 1918 if (put_user(connector->properties.values[i], 1919 prop_values + copied)) { 1920 ret = -EFAULT; 1921 goto out; 1922 } 1923 copied++; 1924 } 1925 } 1926 out_resp->count_props = props_count; 1927 1928 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 1929 copied = 0; 1930 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 1931 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 1932 if (connector->encoder_ids[i] != 0) { 1933 if (put_user(connector->encoder_ids[i], 1934 encoder_ptr + copied)) { 1935 ret = -EFAULT; 1936 goto out; 1937 } 1938 copied++; 1939 } 1940 } 1941 } 1942 out_resp->count_encoders = encoders_count; 1943 1944out: 1945 mutex_unlock(&dev->mode_config.mutex); 1946 1947 return ret; 1948} 1949 1950/** 1951 * drm_mode_getencoder - get encoder configuration 1952 * @dev: drm device for the ioctl 1953 * @data: data pointer for the ioctl 1954 * @file_priv: drm file for the ioctl call 1955 * 1956 * Construct a encoder configuration structure to return to the user. 1957 * 1958 * Called by the user via ioctl. 1959 * 1960 * Returns: 1961 * Zero on success, errno on failure. 1962 */ 1963int drm_mode_getencoder(struct drm_device *dev, void *data, 1964 struct drm_file *file_priv) 1965{ 1966 struct drm_mode_get_encoder *enc_resp = data; 1967 struct drm_encoder *encoder; 1968 int ret = 0; 1969 1970 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1971 return -EINVAL; 1972 1973 drm_modeset_lock_all(dev); 1974 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 1975 if (!encoder) { 1976 ret = -ENOENT; 1977 goto out; 1978 } 1979 1980 if (encoder->crtc) 1981 enc_resp->crtc_id = encoder->crtc->base.id; 1982 else 1983 enc_resp->crtc_id = 0; 1984 enc_resp->encoder_type = encoder->encoder_type; 1985 enc_resp->encoder_id = encoder->base.id; 1986 enc_resp->possible_crtcs = encoder->possible_crtcs; 1987 enc_resp->possible_clones = encoder->possible_clones; 1988 1989out: 1990 drm_modeset_unlock_all(dev); 1991 return ret; 1992} 1993 1994/** 1995 * drm_mode_getplane_res - enumerate all plane resources 1996 * @dev: DRM device 1997 * @data: ioctl data 1998 * @file_priv: DRM file info 1999 * 2000 * Construct a list of plane ids to return to the user. 2001 * 2002 * Called by the user via ioctl. 2003 * 2004 * Returns: 2005 * Zero on success, errno on failure. 2006 */ 2007int drm_mode_getplane_res(struct drm_device *dev, void *data, 2008 struct drm_file *file_priv) 2009{ 2010 struct drm_mode_get_plane_res *plane_resp = data; 2011 struct drm_mode_config *config; 2012 struct drm_plane *plane; 2013 uint32_t __user *plane_ptr; 2014 int copied = 0, ret = 0; 2015 unsigned num_planes; 2016 2017 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2018 return -EINVAL; 2019 2020 drm_modeset_lock_all(dev); 2021 config = &dev->mode_config; 2022 2023 if (file_priv->universal_planes) 2024 num_planes = config->num_total_plane; 2025 else 2026 num_planes = config->num_overlay_plane; 2027 2028 /* 2029 * This ioctl is called twice, once to determine how much space is 2030 * needed, and the 2nd time to fill it. 2031 */ 2032 if (num_planes && 2033 (plane_resp->count_planes >= num_planes)) { 2034 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2035 2036 list_for_each_entry(plane, &config->plane_list, head) { 2037 /* 2038 * Unless userspace set the 'universal planes' 2039 * capability bit, only advertise overlays. 2040 */ 2041 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2042 !file_priv->universal_planes) 2043 continue; 2044 2045 if (put_user(plane->base.id, plane_ptr + copied)) { 2046 ret = -EFAULT; 2047 goto out; 2048 } 2049 copied++; 2050 } 2051 } 2052 plane_resp->count_planes = num_planes; 2053 2054out: 2055 drm_modeset_unlock_all(dev); 2056 return ret; 2057} 2058 2059/** 2060 * drm_mode_getplane - get plane configuration 2061 * @dev: DRM device 2062 * @data: ioctl data 2063 * @file_priv: DRM file info 2064 * 2065 * Construct a plane configuration structure to return to the user. 2066 * 2067 * Called by the user via ioctl. 2068 * 2069 * Returns: 2070 * Zero on success, errno on failure. 2071 */ 2072int drm_mode_getplane(struct drm_device *dev, void *data, 2073 struct drm_file *file_priv) 2074{ 2075 struct drm_mode_get_plane *plane_resp = data; 2076 struct drm_plane *plane; 2077 uint32_t __user *format_ptr; 2078 int ret = 0; 2079 2080 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2081 return -EINVAL; 2082 2083 drm_modeset_lock_all(dev); 2084 plane = drm_plane_find(dev, plane_resp->plane_id); 2085 if (!plane) { 2086 ret = -ENOENT; 2087 goto out; 2088 } 2089 2090 if (plane->crtc) 2091 plane_resp->crtc_id = plane->crtc->base.id; 2092 else 2093 plane_resp->crtc_id = 0; 2094 2095 if (plane->fb) 2096 plane_resp->fb_id = plane->fb->base.id; 2097 else 2098 plane_resp->fb_id = 0; 2099 2100 plane_resp->plane_id = plane->base.id; 2101 plane_resp->possible_crtcs = plane->possible_crtcs; 2102 plane_resp->gamma_size = 0; 2103 2104 /* 2105 * This ioctl is called twice, once to determine how much space is 2106 * needed, and the 2nd time to fill it. 2107 */ 2108 if (plane->format_count && 2109 (plane_resp->count_format_types >= plane->format_count)) { 2110 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2111 if (copy_to_user(format_ptr, 2112 plane->format_types, 2113 sizeof(uint32_t) * plane->format_count)) { 2114 ret = -EFAULT; 2115 goto out; 2116 } 2117 } 2118 plane_resp->count_format_types = plane->format_count; 2119 2120out: 2121 drm_modeset_unlock_all(dev); 2122 return ret; 2123} 2124 2125/** 2126 * drm_mode_setplane - configure a plane's configuration 2127 * @dev: DRM device 2128 * @data: ioctl data* 2129 * @file_priv: DRM file info 2130 * 2131 * Set plane configuration, including placement, fb, scaling, and other factors. 2132 * Or pass a NULL fb to disable. 2133 * 2134 * Returns: 2135 * Zero on success, errno on failure. 2136 */ 2137int drm_mode_setplane(struct drm_device *dev, void *data, 2138 struct drm_file *file_priv) 2139{ 2140 struct drm_mode_set_plane *plane_req = data; 2141 struct drm_plane *plane; 2142 struct drm_crtc *crtc; 2143 struct drm_framebuffer *fb = NULL, *old_fb = NULL; 2144 int ret = 0; 2145 unsigned int fb_width, fb_height; 2146 int i; 2147 2148 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2149 return -EINVAL; 2150 2151 /* 2152 * First, find the plane, crtc, and fb objects. If not available, 2153 * we don't bother to call the driver. 2154 */ 2155 plane = drm_plane_find(dev, plane_req->plane_id); 2156 if (!plane) { 2157 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2158 plane_req->plane_id); 2159 return -ENOENT; 2160 } 2161 2162 /* No fb means shut it down */ 2163 if (!plane_req->fb_id) { 2164 drm_modeset_lock_all(dev); 2165 old_fb = plane->fb; 2166 ret = plane->funcs->disable_plane(plane); 2167 if (!ret) { 2168 plane->crtc = NULL; 2169 plane->fb = NULL; 2170 } else { 2171 old_fb = NULL; 2172 } 2173 drm_modeset_unlock_all(dev); 2174 goto out; 2175 } 2176 2177 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2178 if (!crtc) { 2179 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2180 plane_req->crtc_id); 2181 ret = -ENOENT; 2182 goto out; 2183 } 2184 2185 /* Check whether this plane is usable on this CRTC */ 2186 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2187 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2188 ret = -EINVAL; 2189 goto out; 2190 } 2191 2192 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2193 if (!fb) { 2194 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2195 plane_req->fb_id); 2196 ret = -ENOENT; 2197 goto out; 2198 } 2199 2200 /* Check whether this plane supports the fb pixel format. */ 2201 for (i = 0; i < plane->format_count; i++) 2202 if (fb->pixel_format == plane->format_types[i]) 2203 break; 2204 if (i == plane->format_count) { 2205 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2206 drm_get_format_name(fb->pixel_format)); 2207 ret = -EINVAL; 2208 goto out; 2209 } 2210 2211 fb_width = fb->width << 16; 2212 fb_height = fb->height << 16; 2213 2214 /* Make sure source coordinates are inside the fb. */ 2215 if (plane_req->src_w > fb_width || 2216 plane_req->src_x > fb_width - plane_req->src_w || 2217 plane_req->src_h > fb_height || 2218 plane_req->src_y > fb_height - plane_req->src_h) { 2219 DRM_DEBUG_KMS("Invalid source coordinates " 2220 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2221 plane_req->src_w >> 16, 2222 ((plane_req->src_w & 0xffff) * 15625) >> 10, 2223 plane_req->src_h >> 16, 2224 ((plane_req->src_h & 0xffff) * 15625) >> 10, 2225 plane_req->src_x >> 16, 2226 ((plane_req->src_x & 0xffff) * 15625) >> 10, 2227 plane_req->src_y >> 16, 2228 ((plane_req->src_y & 0xffff) * 15625) >> 10); 2229 ret = -ENOSPC; 2230 goto out; 2231 } 2232 2233 /* Give drivers some help against integer overflows */ 2234 if (plane_req->crtc_w > INT_MAX || 2235 plane_req->crtc_x > INT_MAX - (int32_t) plane_req->crtc_w || 2236 plane_req->crtc_h > INT_MAX || 2237 plane_req->crtc_y > INT_MAX - (int32_t) plane_req->crtc_h) { 2238 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2239 plane_req->crtc_w, plane_req->crtc_h, 2240 plane_req->crtc_x, plane_req->crtc_y); 2241 ret = -ERANGE; 2242 goto out; 2243 } 2244 2245 drm_modeset_lock_all(dev); 2246 old_fb = plane->fb; 2247 ret = plane->funcs->update_plane(plane, crtc, fb, 2248 plane_req->crtc_x, plane_req->crtc_y, 2249 plane_req->crtc_w, plane_req->crtc_h, 2250 plane_req->src_x, plane_req->src_y, 2251 plane_req->src_w, plane_req->src_h); 2252 if (!ret) { 2253 plane->crtc = crtc; 2254 plane->fb = fb; 2255 fb = NULL; 2256 } else { 2257 old_fb = NULL; 2258 } 2259 drm_modeset_unlock_all(dev); 2260 2261out: 2262 if (fb) 2263 drm_framebuffer_unreference(fb); 2264 if (old_fb) 2265 drm_framebuffer_unreference(old_fb); 2266 2267 return ret; 2268} 2269 2270/** 2271 * drm_mode_set_config_internal - helper to call ->set_config 2272 * @set: modeset config to set 2273 * 2274 * This is a little helper to wrap internal calls to the ->set_config driver 2275 * interface. The only thing it adds is correct refcounting dance. 2276 * 2277 * Returns: 2278 * Zero on success, errno on failure. 2279 */ 2280int drm_mode_set_config_internal(struct drm_mode_set *set) 2281{ 2282 struct drm_crtc *crtc = set->crtc; 2283 struct drm_framebuffer *fb; 2284 struct drm_crtc *tmp; 2285 int ret; 2286 2287 /* 2288 * NOTE: ->set_config can also disable other crtcs (if we steal all 2289 * connectors from it), hence we need to refcount the fbs across all 2290 * crtcs. Atomic modeset will have saner semantics ... 2291 */ 2292 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) 2293 tmp->old_fb = tmp->primary->fb; 2294 2295 fb = set->fb; 2296 2297 ret = crtc->funcs->set_config(set); 2298 if (ret == 0) { 2299 crtc->primary->crtc = crtc; 2300 crtc->primary->fb = fb; 2301 } 2302 2303 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { 2304 if (tmp->primary->fb) 2305 drm_framebuffer_reference(tmp->primary->fb); 2306 if (tmp->old_fb) 2307 drm_framebuffer_unreference(tmp->old_fb); 2308 } 2309 2310 return ret; 2311} 2312EXPORT_SYMBOL(drm_mode_set_config_internal); 2313 2314/** 2315 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2316 * CRTC viewport 2317 * @crtc: CRTC that framebuffer will be displayed on 2318 * @x: x panning 2319 * @y: y panning 2320 * @mode: mode that framebuffer will be displayed under 2321 * @fb: framebuffer to check size of 2322 */ 2323int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2324 int x, int y, 2325 const struct drm_display_mode *mode, 2326 const struct drm_framebuffer *fb) 2327 2328{ 2329 int hdisplay, vdisplay; 2330 2331 hdisplay = mode->hdisplay; 2332 vdisplay = mode->vdisplay; 2333 2334 if (drm_mode_is_stereo(mode)) { 2335 struct drm_display_mode adjusted = *mode; 2336 2337 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE); 2338 hdisplay = adjusted.crtc_hdisplay; 2339 vdisplay = adjusted.crtc_vdisplay; 2340 } 2341 2342 if (crtc->invert_dimensions) 2343 swap(hdisplay, vdisplay); 2344 2345 if (hdisplay > fb->width || 2346 vdisplay > fb->height || 2347 x > fb->width - hdisplay || 2348 y > fb->height - vdisplay) { 2349 DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n", 2350 fb->width, fb->height, hdisplay, vdisplay, x, y, 2351 crtc->invert_dimensions ? " (inverted)" : ""); 2352 return -ENOSPC; 2353 } 2354 2355 return 0; 2356} 2357EXPORT_SYMBOL(drm_crtc_check_viewport); 2358 2359/** 2360 * drm_mode_setcrtc - set CRTC configuration 2361 * @dev: drm device for the ioctl 2362 * @data: data pointer for the ioctl 2363 * @file_priv: drm file for the ioctl call 2364 * 2365 * Build a new CRTC configuration based on user request. 2366 * 2367 * Called by the user via ioctl. 2368 * 2369 * Returns: 2370 * Zero on success, errno on failure. 2371 */ 2372int drm_mode_setcrtc(struct drm_device *dev, void *data, 2373 struct drm_file *file_priv) 2374{ 2375 struct drm_mode_config *config = &dev->mode_config; 2376 struct drm_mode_crtc *crtc_req = data; 2377 struct drm_crtc *crtc; 2378 struct drm_connector **connector_set = NULL, *connector; 2379 struct drm_framebuffer *fb = NULL; 2380 struct drm_display_mode *mode = NULL; 2381 struct drm_mode_set set; 2382 uint32_t __user *set_connectors_ptr; 2383 int ret; 2384 int i; 2385 2386 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2387 return -EINVAL; 2388 2389 /* For some reason crtc x/y offsets are signed internally. */ 2390 if (crtc_req->x > INT_MAX || crtc_req->y > INT_MAX) 2391 return -ERANGE; 2392 2393 drm_modeset_lock_all(dev); 2394 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2395 if (!crtc) { 2396 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2397 ret = -ENOENT; 2398 goto out; 2399 } 2400 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 2401 2402 if (crtc_req->mode_valid) { 2403 /* If we have a mode we need a framebuffer. */ 2404 /* If we pass -1, set the mode with the currently bound fb */ 2405 if (crtc_req->fb_id == -1) { 2406 if (!crtc->primary->fb) { 2407 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2408 ret = -EINVAL; 2409 goto out; 2410 } 2411 fb = crtc->primary->fb; 2412 /* Make refcounting symmetric with the lookup path. */ 2413 drm_framebuffer_reference(fb); 2414 } else { 2415 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2416 if (!fb) { 2417 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2418 crtc_req->fb_id); 2419 ret = -ENOENT; 2420 goto out; 2421 } 2422 } 2423 2424 mode = drm_mode_create(dev); 2425 if (!mode) { 2426 ret = -ENOMEM; 2427 goto out; 2428 } 2429 2430 ret = drm_crtc_convert_umode(mode, &crtc_req->mode); 2431 if (ret) { 2432 DRM_DEBUG_KMS("Invalid mode\n"); 2433 goto out; 2434 } 2435 2436 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 2437 2438 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2439 mode, fb); 2440 if (ret) 2441 goto out; 2442 2443 } 2444 2445 if (crtc_req->count_connectors == 0 && mode) { 2446 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2447 ret = -EINVAL; 2448 goto out; 2449 } 2450 2451 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2452 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2453 crtc_req->count_connectors); 2454 ret = -EINVAL; 2455 goto out; 2456 } 2457 2458 if (crtc_req->count_connectors > 0) { 2459 u32 out_id; 2460 2461 /* Avoid unbounded kernel memory allocation */ 2462 if (crtc_req->count_connectors > config->num_connector) { 2463 ret = -EINVAL; 2464 goto out; 2465 } 2466 2467 connector_set = kmalloc(crtc_req->count_connectors * 2468 sizeof(struct drm_connector *), 2469 GFP_KERNEL); 2470 if (!connector_set) { 2471 ret = -ENOMEM; 2472 goto out; 2473 } 2474 2475 for (i = 0; i < crtc_req->count_connectors; i++) { 2476 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2477 if (get_user(out_id, &set_connectors_ptr[i])) { 2478 ret = -EFAULT; 2479 goto out; 2480 } 2481 2482 connector = drm_connector_find(dev, out_id); 2483 if (!connector) { 2484 DRM_DEBUG_KMS("Connector id %d unknown\n", 2485 out_id); 2486 ret = -ENOENT; 2487 goto out; 2488 } 2489 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2490 connector->base.id, 2491 connector->name); 2492 2493 connector_set[i] = connector; 2494 } 2495 } 2496 2497 set.crtc = crtc; 2498 set.x = crtc_req->x; 2499 set.y = crtc_req->y; 2500 set.mode = mode; 2501 set.connectors = connector_set; 2502 set.num_connectors = crtc_req->count_connectors; 2503 set.fb = fb; 2504 ret = drm_mode_set_config_internal(&set); 2505 2506out: 2507 if (fb) 2508 drm_framebuffer_unreference(fb); 2509 2510 kfree(connector_set); 2511 drm_mode_destroy(dev, mode); 2512 drm_modeset_unlock_all(dev); 2513 return ret; 2514} 2515 2516static int drm_mode_cursor_common(struct drm_device *dev, 2517 struct drm_mode_cursor2 *req, 2518 struct drm_file *file_priv) 2519{ 2520 struct drm_crtc *crtc; 2521 int ret = 0; 2522 2523 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2524 return -EINVAL; 2525 2526 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 2527 return -EINVAL; 2528 2529 crtc = drm_crtc_find(dev, req->crtc_id); 2530 if (!crtc) { 2531 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 2532 return -ENOENT; 2533 } 2534 2535 drm_modeset_lock(&crtc->mutex, NULL); 2536 if (req->flags & DRM_MODE_CURSOR_BO) { 2537 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 2538 ret = -ENXIO; 2539 goto out; 2540 } 2541 /* Turns off the cursor if handle is 0 */ 2542 if (crtc->funcs->cursor_set2) 2543 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 2544 req->width, req->height, req->hot_x, req->hot_y); 2545 else 2546 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 2547 req->width, req->height); 2548 } 2549 2550 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2551 if (crtc->funcs->cursor_move) { 2552 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 2553 } else { 2554 ret = -EFAULT; 2555 goto out; 2556 } 2557 } 2558out: 2559 drm_modeset_unlock(&crtc->mutex); 2560 2561 return ret; 2562 2563} 2564 2565 2566/** 2567 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 2568 * @dev: drm device for the ioctl 2569 * @data: data pointer for the ioctl 2570 * @file_priv: drm file for the ioctl call 2571 * 2572 * Set the cursor configuration based on user request. 2573 * 2574 * Called by the user via ioctl. 2575 * 2576 * Returns: 2577 * Zero on success, errno on failure. 2578 */ 2579int drm_mode_cursor_ioctl(struct drm_device *dev, 2580 void *data, struct drm_file *file_priv) 2581{ 2582 struct drm_mode_cursor *req = data; 2583 struct drm_mode_cursor2 new_req; 2584 2585 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 2586 new_req.hot_x = new_req.hot_y = 0; 2587 2588 return drm_mode_cursor_common(dev, &new_req, file_priv); 2589} 2590 2591/** 2592 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 2593 * @dev: drm device for the ioctl 2594 * @data: data pointer for the ioctl 2595 * @file_priv: drm file for the ioctl call 2596 * 2597 * Set the cursor configuration based on user request. This implements the 2nd 2598 * version of the cursor ioctl, which allows userspace to additionally specify 2599 * the hotspot of the pointer. 2600 * 2601 * Called by the user via ioctl. 2602 * 2603 * Returns: 2604 * Zero on success, errno on failure. 2605 */ 2606int drm_mode_cursor2_ioctl(struct drm_device *dev, 2607 void *data, struct drm_file *file_priv) 2608{ 2609 struct drm_mode_cursor2 *req = data; 2610 return drm_mode_cursor_common(dev, req, file_priv); 2611} 2612 2613/** 2614 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 2615 * @bpp: bits per pixels 2616 * @depth: bit depth per pixel 2617 * 2618 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 2619 * Useful in fbdev emulation code, since that deals in those values. 2620 */ 2621uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 2622{ 2623 uint32_t fmt; 2624 2625 switch (bpp) { 2626 case 8: 2627 fmt = DRM_FORMAT_C8; 2628 break; 2629 case 16: 2630 if (depth == 15) 2631 fmt = DRM_FORMAT_XRGB1555; 2632 else 2633 fmt = DRM_FORMAT_RGB565; 2634 break; 2635 case 24: 2636 fmt = DRM_FORMAT_RGB888; 2637 break; 2638 case 32: 2639 if (depth == 24) 2640 fmt = DRM_FORMAT_XRGB8888; 2641 else if (depth == 30) 2642 fmt = DRM_FORMAT_XRGB2101010; 2643 else 2644 fmt = DRM_FORMAT_ARGB8888; 2645 break; 2646 default: 2647 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 2648 fmt = DRM_FORMAT_XRGB8888; 2649 break; 2650 } 2651 2652 return fmt; 2653} 2654EXPORT_SYMBOL(drm_mode_legacy_fb_format); 2655 2656/** 2657 * drm_mode_addfb - add an FB to the graphics configuration 2658 * @dev: drm device for the ioctl 2659 * @data: data pointer for the ioctl 2660 * @file_priv: drm file for the ioctl call 2661 * 2662 * Add a new FB to the specified CRTC, given a user request. This is the 2663 * original addfb ioclt which only supported RGB formats. 2664 * 2665 * Called by the user via ioctl. 2666 * 2667 * Returns: 2668 * Zero on success, errno on failure. 2669 */ 2670int drm_mode_addfb(struct drm_device *dev, 2671 void *data, struct drm_file *file_priv) 2672{ 2673 struct drm_mode_fb_cmd *or = data; 2674 struct drm_mode_fb_cmd2 r = {}; 2675 struct drm_mode_config *config = &dev->mode_config; 2676 struct drm_framebuffer *fb; 2677 int ret = 0; 2678 2679 /* Use new struct with format internally */ 2680 r.fb_id = or->fb_id; 2681 r.width = or->width; 2682 r.height = or->height; 2683 r.pitches[0] = or->pitch; 2684 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 2685 r.handles[0] = or->handle; 2686 2687 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2688 return -EINVAL; 2689 2690 if ((config->min_width > r.width) || (r.width > config->max_width)) 2691 return -EINVAL; 2692 2693 if ((config->min_height > r.height) || (r.height > config->max_height)) 2694 return -EINVAL; 2695 2696 fb = dev->mode_config.funcs->fb_create(dev, file_priv, &r); 2697 if (IS_ERR(fb)) { 2698 DRM_DEBUG_KMS("could not create framebuffer\n"); 2699 return PTR_ERR(fb); 2700 } 2701 2702 mutex_lock(&file_priv->fbs_lock); 2703 or->fb_id = fb->base.id; 2704 list_add(&fb->filp_head, &file_priv->fbs); 2705 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 2706 mutex_unlock(&file_priv->fbs_lock); 2707 2708 return ret; 2709} 2710 2711static int format_check(const struct drm_mode_fb_cmd2 *r) 2712{ 2713 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 2714 2715 switch (format) { 2716 case DRM_FORMAT_C8: 2717 case DRM_FORMAT_RGB332: 2718 case DRM_FORMAT_BGR233: 2719 case DRM_FORMAT_XRGB4444: 2720 case DRM_FORMAT_XBGR4444: 2721 case DRM_FORMAT_RGBX4444: 2722 case DRM_FORMAT_BGRX4444: 2723 case DRM_FORMAT_ARGB4444: 2724 case DRM_FORMAT_ABGR4444: 2725 case DRM_FORMAT_RGBA4444: 2726 case DRM_FORMAT_BGRA4444: 2727 case DRM_FORMAT_XRGB1555: 2728 case DRM_FORMAT_XBGR1555: 2729 case DRM_FORMAT_RGBX5551: 2730 case DRM_FORMAT_BGRX5551: 2731 case DRM_FORMAT_ARGB1555: 2732 case DRM_FORMAT_ABGR1555: 2733 case DRM_FORMAT_RGBA5551: 2734 case DRM_FORMAT_BGRA5551: 2735 case DRM_FORMAT_RGB565: 2736 case DRM_FORMAT_BGR565: 2737 case DRM_FORMAT_RGB888: 2738 case DRM_FORMAT_BGR888: 2739 case DRM_FORMAT_XRGB8888: 2740 case DRM_FORMAT_XBGR8888: 2741 case DRM_FORMAT_RGBX8888: 2742 case DRM_FORMAT_BGRX8888: 2743 case DRM_FORMAT_ARGB8888: 2744 case DRM_FORMAT_ABGR8888: 2745 case DRM_FORMAT_RGBA8888: 2746 case DRM_FORMAT_BGRA8888: 2747 case DRM_FORMAT_XRGB2101010: 2748 case DRM_FORMAT_XBGR2101010: 2749 case DRM_FORMAT_RGBX1010102: 2750 case DRM_FORMAT_BGRX1010102: 2751 case DRM_FORMAT_ARGB2101010: 2752 case DRM_FORMAT_ABGR2101010: 2753 case DRM_FORMAT_RGBA1010102: 2754 case DRM_FORMAT_BGRA1010102: 2755 case DRM_FORMAT_YUYV: 2756 case DRM_FORMAT_YVYU: 2757 case DRM_FORMAT_UYVY: 2758 case DRM_FORMAT_VYUY: 2759 case DRM_FORMAT_AYUV: 2760 case DRM_FORMAT_NV12: 2761 case DRM_FORMAT_NV21: 2762 case DRM_FORMAT_NV16: 2763 case DRM_FORMAT_NV61: 2764 case DRM_FORMAT_NV24: 2765 case DRM_FORMAT_NV42: 2766 case DRM_FORMAT_YUV410: 2767 case DRM_FORMAT_YVU410: 2768 case DRM_FORMAT_YUV411: 2769 case DRM_FORMAT_YVU411: 2770 case DRM_FORMAT_YUV420: 2771 case DRM_FORMAT_YVU420: 2772 case DRM_FORMAT_YUV422: 2773 case DRM_FORMAT_YVU422: 2774 case DRM_FORMAT_YUV444: 2775 case DRM_FORMAT_YVU444: 2776 return 0; 2777 default: 2778 DRM_DEBUG_KMS("invalid pixel format %s\n", 2779 drm_get_format_name(r->pixel_format)); 2780 return -EINVAL; 2781 } 2782} 2783 2784static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 2785{ 2786 int ret, hsub, vsub, num_planes, i; 2787 2788 ret = format_check(r); 2789 if (ret) { 2790 DRM_DEBUG_KMS("bad framebuffer format %s\n", 2791 drm_get_format_name(r->pixel_format)); 2792 return ret; 2793 } 2794 2795 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 2796 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 2797 num_planes = drm_format_num_planes(r->pixel_format); 2798 2799 if (r->width == 0 || r->width % hsub) { 2800 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->height); 2801 return -EINVAL; 2802 } 2803 2804 if (r->height == 0 || r->height % vsub) { 2805 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 2806 return -EINVAL; 2807 } 2808 2809 for (i = 0; i < num_planes; i++) { 2810 unsigned int width = r->width / (i != 0 ? hsub : 1); 2811 unsigned int height = r->height / (i != 0 ? vsub : 1); 2812 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 2813 2814 if (!r->handles[i]) { 2815 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 2816 return -EINVAL; 2817 } 2818 2819 if ((uint64_t) width * cpp > UINT_MAX) 2820 return -ERANGE; 2821 2822 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 2823 return -ERANGE; 2824 2825 if (r->pitches[i] < width * cpp) { 2826 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 2827 return -EINVAL; 2828 } 2829 } 2830 2831 return 0; 2832} 2833 2834static struct drm_framebuffer *add_framebuffer_internal(struct drm_device *dev, 2835 struct drm_mode_fb_cmd2 *r, 2836 struct drm_file *file_priv) 2837{ 2838 struct drm_mode_config *config = &dev->mode_config; 2839 struct drm_framebuffer *fb; 2840 int ret; 2841 2842 if (r->flags & ~DRM_MODE_FB_INTERLACED) { 2843 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 2844 return ERR_PTR(-EINVAL); 2845 } 2846 2847 if ((config->min_width > r->width) || (r->width > config->max_width)) { 2848 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 2849 r->width, config->min_width, config->max_width); 2850 return ERR_PTR(-EINVAL); 2851 } 2852 if ((config->min_height > r->height) || (r->height > config->max_height)) { 2853 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 2854 r->height, config->min_height, config->max_height); 2855 return ERR_PTR(-EINVAL); 2856 } 2857 2858 ret = framebuffer_check(r); 2859 if (ret) 2860 return ERR_PTR(ret); 2861 2862 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 2863 if (IS_ERR(fb)) { 2864 DRM_DEBUG_KMS("could not create framebuffer\n"); 2865 return fb; 2866 } 2867 2868 mutex_lock(&file_priv->fbs_lock); 2869 r->fb_id = fb->base.id; 2870 list_add(&fb->filp_head, &file_priv->fbs); 2871 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 2872 mutex_unlock(&file_priv->fbs_lock); 2873 2874 return fb; 2875} 2876 2877/** 2878 * drm_mode_addfb2 - add an FB to the graphics configuration 2879 * @dev: drm device for the ioctl 2880 * @data: data pointer for the ioctl 2881 * @file_priv: drm file for the ioctl call 2882 * 2883 * Add a new FB to the specified CRTC, given a user request with format. This is 2884 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 2885 * and uses fourcc codes as pixel format specifiers. 2886 * 2887 * Called by the user via ioctl. 2888 * 2889 * Returns: 2890 * Zero on success, errno on failure. 2891 */ 2892int drm_mode_addfb2(struct drm_device *dev, 2893 void *data, struct drm_file *file_priv) 2894{ 2895 struct drm_framebuffer *fb; 2896 2897 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2898 return -EINVAL; 2899 2900 fb = add_framebuffer_internal(dev, data, file_priv); 2901 if (IS_ERR(fb)) 2902 return PTR_ERR(fb); 2903 2904 return 0; 2905} 2906 2907/** 2908 * drm_mode_rmfb - remove an FB from the configuration 2909 * @dev: drm device for the ioctl 2910 * @data: data pointer for the ioctl 2911 * @file_priv: drm file for the ioctl call 2912 * 2913 * Remove the FB specified by the user. 2914 * 2915 * Called by the user via ioctl. 2916 * 2917 * Returns: 2918 * Zero on success, errno on failure. 2919 */ 2920int drm_mode_rmfb(struct drm_device *dev, 2921 void *data, struct drm_file *file_priv) 2922{ 2923 struct drm_framebuffer *fb = NULL; 2924 struct drm_framebuffer *fbl = NULL; 2925 uint32_t *id = data; 2926 int found = 0; 2927 2928 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2929 return -EINVAL; 2930 2931 mutex_lock(&file_priv->fbs_lock); 2932 mutex_lock(&dev->mode_config.fb_lock); 2933 fb = __drm_framebuffer_lookup(dev, *id); 2934 if (!fb) 2935 goto fail_lookup; 2936 2937 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 2938 if (fb == fbl) 2939 found = 1; 2940 if (!found) 2941 goto fail_lookup; 2942 2943 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ 2944 __drm_framebuffer_unregister(dev, fb); 2945 2946 list_del_init(&fb->filp_head); 2947 mutex_unlock(&dev->mode_config.fb_lock); 2948 mutex_unlock(&file_priv->fbs_lock); 2949 2950 drm_framebuffer_remove(fb); 2951 2952 return 0; 2953 2954fail_lookup: 2955 mutex_unlock(&dev->mode_config.fb_lock); 2956 mutex_unlock(&file_priv->fbs_lock); 2957 2958 return -ENOENT; 2959} 2960 2961/** 2962 * drm_mode_getfb - get FB info 2963 * @dev: drm device for the ioctl 2964 * @data: data pointer for the ioctl 2965 * @file_priv: drm file for the ioctl call 2966 * 2967 * Lookup the FB given its ID and return info about it. 2968 * 2969 * Called by the user via ioctl. 2970 * 2971 * Returns: 2972 * Zero on success, errno on failure. 2973 */ 2974int drm_mode_getfb(struct drm_device *dev, 2975 void *data, struct drm_file *file_priv) 2976{ 2977 struct drm_mode_fb_cmd *r = data; 2978 struct drm_framebuffer *fb; 2979 int ret; 2980 2981 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2982 return -EINVAL; 2983 2984 fb = drm_framebuffer_lookup(dev, r->fb_id); 2985 if (!fb) 2986 return -ENOENT; 2987 2988 r->height = fb->height; 2989 r->width = fb->width; 2990 r->depth = fb->depth; 2991 r->bpp = fb->bits_per_pixel; 2992 r->pitch = fb->pitches[0]; 2993 if (fb->funcs->create_handle) { 2994 if (file_priv->is_master || capable(CAP_SYS_ADMIN) || 2995 drm_is_control_client(file_priv)) { 2996 ret = fb->funcs->create_handle(fb, file_priv, 2997 &r->handle); 2998 } else { 2999 /* GET_FB() is an unprivileged ioctl so we must not 3000 * return a buffer-handle to non-master processes! For 3001 * backwards-compatibility reasons, we cannot make 3002 * GET_FB() privileged, so just return an invalid handle 3003 * for non-masters. */ 3004 r->handle = 0; 3005 ret = 0; 3006 } 3007 } else { 3008 ret = -ENODEV; 3009 } 3010 3011 drm_framebuffer_unreference(fb); 3012 3013 return ret; 3014} 3015 3016/** 3017 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3018 * @dev: drm device for the ioctl 3019 * @data: data pointer for the ioctl 3020 * @file_priv: drm file for the ioctl call 3021 * 3022 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3023 * rectangle list. Generic userspace which does frontbuffer rendering must call 3024 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3025 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3026 * 3027 * Modesetting drivers which always update the frontbuffer do not need to 3028 * implement the corresponding ->dirty framebuffer callback. 3029 * 3030 * Called by the user via ioctl. 3031 * 3032 * Returns: 3033 * Zero on success, errno on failure. 3034 */ 3035int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3036 void *data, struct drm_file *file_priv) 3037{ 3038 struct drm_clip_rect __user *clips_ptr; 3039 struct drm_clip_rect *clips = NULL; 3040 struct drm_mode_fb_dirty_cmd *r = data; 3041 struct drm_framebuffer *fb; 3042 unsigned flags; 3043 int num_clips; 3044 int ret; 3045 3046 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3047 return -EINVAL; 3048 3049 fb = drm_framebuffer_lookup(dev, r->fb_id); 3050 if (!fb) 3051 return -ENOENT; 3052 3053 num_clips = r->num_clips; 3054 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3055 3056 if (!num_clips != !clips_ptr) { 3057 ret = -EINVAL; 3058 goto out_err1; 3059 } 3060 3061 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3062 3063 /* If userspace annotates copy, clips must come in pairs */ 3064 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3065 ret = -EINVAL; 3066 goto out_err1; 3067 } 3068 3069 if (num_clips && clips_ptr) { 3070 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3071 ret = -EINVAL; 3072 goto out_err1; 3073 } 3074 clips = kzalloc(num_clips * sizeof(*clips), GFP_KERNEL); 3075 if (!clips) { 3076 ret = -ENOMEM; 3077 goto out_err1; 3078 } 3079 3080 ret = copy_from_user(clips, clips_ptr, 3081 num_clips * sizeof(*clips)); 3082 if (ret) { 3083 ret = -EFAULT; 3084 goto out_err2; 3085 } 3086 } 3087 3088 if (fb->funcs->dirty) { 3089 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3090 clips, num_clips); 3091 } else { 3092 ret = -ENOSYS; 3093 } 3094 3095out_err2: 3096 kfree(clips); 3097out_err1: 3098 drm_framebuffer_unreference(fb); 3099 3100 return ret; 3101} 3102 3103 3104/** 3105 * drm_fb_release - remove and free the FBs on this file 3106 * @priv: drm file for the ioctl 3107 * 3108 * Destroy all the FBs associated with @filp. 3109 * 3110 * Called by the user via ioctl. 3111 * 3112 * Returns: 3113 * Zero on success, errno on failure. 3114 */ 3115void drm_fb_release(struct drm_file *priv) 3116{ 3117 struct drm_device *dev = priv->minor->dev; 3118 struct drm_framebuffer *fb, *tfb; 3119 3120 mutex_lock(&priv->fbs_lock); 3121 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3122 3123 mutex_lock(&dev->mode_config.fb_lock); 3124 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ 3125 __drm_framebuffer_unregister(dev, fb); 3126 mutex_unlock(&dev->mode_config.fb_lock); 3127 3128 list_del_init(&fb->filp_head); 3129 3130 /* This will also drop the fpriv->fbs reference. */ 3131 drm_framebuffer_remove(fb); 3132 } 3133 mutex_unlock(&priv->fbs_lock); 3134} 3135 3136/** 3137 * drm_property_create - create a new property type 3138 * @dev: drm device 3139 * @flags: flags specifying the property type 3140 * @name: name of the property 3141 * @num_values: number of pre-defined values 3142 * 3143 * This creates a new generic drm property which can then be attached to a drm 3144 * object with drm_object_attach_property. The returned property object must be 3145 * freed with drm_property_destroy. 3146 * 3147 * Returns: 3148 * A pointer to the newly created property on success, NULL on failure. 3149 */ 3150struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3151 const char *name, int num_values) 3152{ 3153 struct drm_property *property = NULL; 3154 int ret; 3155 3156 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3157 if (!property) 3158 return NULL; 3159 3160 property->dev = dev; 3161 3162 if (num_values) { 3163 property->values = kzalloc(sizeof(uint64_t)*num_values, GFP_KERNEL); 3164 if (!property->values) 3165 goto fail; 3166 } 3167 3168 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3169 if (ret) 3170 goto fail; 3171 3172 property->flags = flags; 3173 property->num_values = num_values; 3174 INIT_LIST_HEAD(&property->enum_blob_list); 3175 3176 if (name) { 3177 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3178 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3179 } 3180 3181 list_add_tail(&property->head, &dev->mode_config.property_list); 3182 3183 WARN_ON(!drm_property_type_valid(property)); 3184 3185 return property; 3186fail: 3187 kfree(property->values); 3188 kfree(property); 3189 return NULL; 3190} 3191EXPORT_SYMBOL(drm_property_create); 3192 3193/** 3194 * drm_property_create - create a new enumeration property type 3195 * @dev: drm device 3196 * @flags: flags specifying the property type 3197 * @name: name of the property 3198 * @props: enumeration lists with property values 3199 * @num_values: number of pre-defined values 3200 * 3201 * This creates a new generic drm property which can then be attached to a drm 3202 * object with drm_object_attach_property. The returned property object must be 3203 * freed with drm_property_destroy. 3204 * 3205 * Userspace is only allowed to set one of the predefined values for enumeration 3206 * properties. 3207 * 3208 * Returns: 3209 * A pointer to the newly created property on success, NULL on failure. 3210 */ 3211struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3212 const char *name, 3213 const struct drm_prop_enum_list *props, 3214 int num_values) 3215{ 3216 struct drm_property *property; 3217 int i, ret; 3218 3219 flags |= DRM_MODE_PROP_ENUM; 3220 3221 property = drm_property_create(dev, flags, name, num_values); 3222 if (!property) 3223 return NULL; 3224 3225 for (i = 0; i < num_values; i++) { 3226 ret = drm_property_add_enum(property, i, 3227 props[i].type, 3228 props[i].name); 3229 if (ret) { 3230 drm_property_destroy(dev, property); 3231 return NULL; 3232 } 3233 } 3234 3235 return property; 3236} 3237EXPORT_SYMBOL(drm_property_create_enum); 3238 3239/** 3240 * drm_property_create - create a new bitmask property type 3241 * @dev: drm device 3242 * @flags: flags specifying the property type 3243 * @name: name of the property 3244 * @props: enumeration lists with property bitflags 3245 * @num_values: number of pre-defined values 3246 * 3247 * This creates a new generic drm property which can then be attached to a drm 3248 * object with drm_object_attach_property. The returned property object must be 3249 * freed with drm_property_destroy. 3250 * 3251 * Compared to plain enumeration properties userspace is allowed to set any 3252 * or'ed together combination of the predefined property bitflag values 3253 * 3254 * Returns: 3255 * A pointer to the newly created property on success, NULL on failure. 3256 */ 3257struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3258 int flags, const char *name, 3259 const struct drm_prop_enum_list *props, 3260 int num_values) 3261{ 3262 struct drm_property *property; 3263 int i, ret; 3264 3265 flags |= DRM_MODE_PROP_BITMASK; 3266 3267 property = drm_property_create(dev, flags, name, num_values); 3268 if (!property) 3269 return NULL; 3270 3271 for (i = 0; i < num_values; i++) { 3272 ret = drm_property_add_enum(property, i, 3273 props[i].type, 3274 props[i].name); 3275 if (ret) { 3276 drm_property_destroy(dev, property); 3277 return NULL; 3278 } 3279 } 3280 3281 return property; 3282} 3283EXPORT_SYMBOL(drm_property_create_bitmask); 3284 3285static struct drm_property *property_create_range(struct drm_device *dev, 3286 int flags, const char *name, 3287 uint64_t min, uint64_t max) 3288{ 3289 struct drm_property *property; 3290 3291 property = drm_property_create(dev, flags, name, 2); 3292 if (!property) 3293 return NULL; 3294 3295 property->values[0] = min; 3296 property->values[1] = max; 3297 3298 return property; 3299} 3300 3301/** 3302 * drm_property_create - create a new ranged property type 3303 * @dev: drm device 3304 * @flags: flags specifying the property type 3305 * @name: name of the property 3306 * @min: minimum value of the property 3307 * @max: maximum value of the property 3308 * 3309 * This creates a new generic drm property which can then be attached to a drm 3310 * object with drm_object_attach_property. The returned property object must be 3311 * freed with drm_property_destroy. 3312 * 3313 * Userspace is allowed to set any interger value in the (min, max) range 3314 * inclusive. 3315 * 3316 * Returns: 3317 * A pointer to the newly created property on success, NULL on failure. 3318 */ 3319struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3320 const char *name, 3321 uint64_t min, uint64_t max) 3322{ 3323 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3324 name, min, max); 3325} 3326EXPORT_SYMBOL(drm_property_create_range); 3327 3328struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3329 int flags, const char *name, 3330 int64_t min, int64_t max) 3331{ 3332 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3333 name, I642U64(min), I642U64(max)); 3334} 3335EXPORT_SYMBOL(drm_property_create_signed_range); 3336 3337struct drm_property *drm_property_create_object(struct drm_device *dev, 3338 int flags, const char *name, uint32_t type) 3339{ 3340 struct drm_property *property; 3341 3342 flags |= DRM_MODE_PROP_OBJECT; 3343 3344 property = drm_property_create(dev, flags, name, 1); 3345 if (!property) 3346 return NULL; 3347 3348 property->values[0] = type; 3349 3350 return property; 3351} 3352EXPORT_SYMBOL(drm_property_create_object); 3353 3354/** 3355 * drm_property_add_enum - add a possible value to an enumeration property 3356 * @property: enumeration property to change 3357 * @index: index of the new enumeration 3358 * @value: value of the new enumeration 3359 * @name: symbolic name of the new enumeration 3360 * 3361 * This functions adds enumerations to a property. 3362 * 3363 * It's use is deprecated, drivers should use one of the more specific helpers 3364 * to directly create the property with all enumerations already attached. 3365 * 3366 * Returns: 3367 * Zero on success, error code on failure. 3368 */ 3369int drm_property_add_enum(struct drm_property *property, int index, 3370 uint64_t value, const char *name) 3371{ 3372 struct drm_property_enum *prop_enum; 3373 3374 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3375 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3376 return -EINVAL; 3377 3378 /* 3379 * Bitmask enum properties have the additional constraint of values 3380 * from 0 to 63 3381 */ 3382 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3383 (value > 63)) 3384 return -EINVAL; 3385 3386 if (!list_empty(&property->enum_blob_list)) { 3387 list_for_each_entry(prop_enum, &property->enum_blob_list, head) { 3388 if (prop_enum->value == value) { 3389 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3390 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3391 return 0; 3392 } 3393 } 3394 } 3395 3396 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3397 if (!prop_enum) 3398 return -ENOMEM; 3399 3400 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3401 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3402 prop_enum->value = value; 3403 3404 property->values[index] = value; 3405 list_add_tail(&prop_enum->head, &property->enum_blob_list); 3406 return 0; 3407} 3408EXPORT_SYMBOL(drm_property_add_enum); 3409 3410/** 3411 * drm_property_destroy - destroy a drm property 3412 * @dev: drm device 3413 * @property: property to destry 3414 * 3415 * This function frees a property including any attached resources like 3416 * enumeration values. 3417 */ 3418void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 3419{ 3420 struct drm_property_enum *prop_enum, *pt; 3421 3422 list_for_each_entry_safe(prop_enum, pt, &property->enum_blob_list, head) { 3423 list_del(&prop_enum->head); 3424 kfree(prop_enum); 3425 } 3426 3427 if (property->num_values) 3428 kfree(property->values); 3429 drm_mode_object_put(dev, &property->base); 3430 list_del(&property->head); 3431 kfree(property); 3432} 3433EXPORT_SYMBOL(drm_property_destroy); 3434 3435/** 3436 * drm_object_attach_property - attach a property to a modeset object 3437 * @obj: drm modeset object 3438 * @property: property to attach 3439 * @init_val: initial value of the property 3440 * 3441 * This attaches the given property to the modeset object with the given initial 3442 * value. Currently this function cannot fail since the properties are stored in 3443 * a statically sized array. 3444 */ 3445void drm_object_attach_property(struct drm_mode_object *obj, 3446 struct drm_property *property, 3447 uint64_t init_val) 3448{ 3449 int count = obj->properties->count; 3450 3451 if (count == DRM_OBJECT_MAX_PROPERTY) { 3452 WARN(1, "Failed to attach object property (type: 0x%x). Please " 3453 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 3454 "you see this message on the same object type.\n", 3455 obj->type); 3456 return; 3457 } 3458 3459 obj->properties->ids[count] = property->base.id; 3460 obj->properties->values[count] = init_val; 3461 obj->properties->count++; 3462} 3463EXPORT_SYMBOL(drm_object_attach_property); 3464 3465/** 3466 * drm_object_property_set_value - set the value of a property 3467 * @obj: drm mode object to set property value for 3468 * @property: property to set 3469 * @val: value the property should be set to 3470 * 3471 * This functions sets a given property on a given object. This function only 3472 * changes the software state of the property, it does not call into the 3473 * driver's ->set_property callback. 3474 * 3475 * Returns: 3476 * Zero on success, error code on failure. 3477 */ 3478int drm_object_property_set_value(struct drm_mode_object *obj, 3479 struct drm_property *property, uint64_t val) 3480{ 3481 int i; 3482 3483 for (i = 0; i < obj->properties->count; i++) { 3484 if (obj->properties->ids[i] == property->base.id) { 3485 obj->properties->values[i] = val; 3486 return 0; 3487 } 3488 } 3489 3490 return -EINVAL; 3491} 3492EXPORT_SYMBOL(drm_object_property_set_value); 3493 3494/** 3495 * drm_object_property_get_value - retrieve the value of a property 3496 * @obj: drm mode object to get property value from 3497 * @property: property to retrieve 3498 * @val: storage for the property value 3499 * 3500 * This function retrieves the softare state of the given property for the given 3501 * property. Since there is no driver callback to retrieve the current property 3502 * value this might be out of sync with the hardware, depending upon the driver 3503 * and property. 3504 * 3505 * Returns: 3506 * Zero on success, error code on failure. 3507 */ 3508int drm_object_property_get_value(struct drm_mode_object *obj, 3509 struct drm_property *property, uint64_t *val) 3510{ 3511 int i; 3512 3513 for (i = 0; i < obj->properties->count; i++) { 3514 if (obj->properties->ids[i] == property->base.id) { 3515 *val = obj->properties->values[i]; 3516 return 0; 3517 } 3518 } 3519 3520 return -EINVAL; 3521} 3522EXPORT_SYMBOL(drm_object_property_get_value); 3523 3524/** 3525 * drm_mode_getproperty_ioctl - get the current value of a connector's property 3526 * @dev: DRM device 3527 * @data: ioctl data 3528 * @file_priv: DRM file info 3529 * 3530 * This function retrieves the current value for an connectors's property. 3531 * 3532 * Called by the user via ioctl. 3533 * 3534 * Returns: 3535 * Zero on success, errno on failure. 3536 */ 3537int drm_mode_getproperty_ioctl(struct drm_device *dev, 3538 void *data, struct drm_file *file_priv) 3539{ 3540 struct drm_mode_get_property *out_resp = data; 3541 struct drm_property *property; 3542 int enum_count = 0; 3543 int blob_count = 0; 3544 int value_count = 0; 3545 int ret = 0, i; 3546 int copied; 3547 struct drm_property_enum *prop_enum; 3548 struct drm_mode_property_enum __user *enum_ptr; 3549 struct drm_property_blob *prop_blob; 3550 uint32_t __user *blob_id_ptr; 3551 uint64_t __user *values_ptr; 3552 uint32_t __user *blob_length_ptr; 3553 3554 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3555 return -EINVAL; 3556 3557 drm_modeset_lock_all(dev); 3558 property = drm_property_find(dev, out_resp->prop_id); 3559 if (!property) { 3560 ret = -ENOENT; 3561 goto done; 3562 } 3563 3564 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3565 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 3566 list_for_each_entry(prop_enum, &property->enum_blob_list, head) 3567 enum_count++; 3568 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 3569 list_for_each_entry(prop_blob, &property->enum_blob_list, head) 3570 blob_count++; 3571 } 3572 3573 value_count = property->num_values; 3574 3575 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 3576 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 3577 out_resp->flags = property->flags; 3578 3579 if ((out_resp->count_values >= value_count) && value_count) { 3580 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 3581 for (i = 0; i < value_count; i++) { 3582 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 3583 ret = -EFAULT; 3584 goto done; 3585 } 3586 } 3587 } 3588 out_resp->count_values = value_count; 3589 3590 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3591 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 3592 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 3593 copied = 0; 3594 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 3595 list_for_each_entry(prop_enum, &property->enum_blob_list, head) { 3596 3597 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 3598 ret = -EFAULT; 3599 goto done; 3600 } 3601 3602 if (copy_to_user(&enum_ptr[copied].name, 3603 &prop_enum->name, DRM_PROP_NAME_LEN)) { 3604 ret = -EFAULT; 3605 goto done; 3606 } 3607 copied++; 3608 } 3609 } 3610 out_resp->count_enum_blobs = enum_count; 3611 } 3612 3613 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 3614 if ((out_resp->count_enum_blobs >= blob_count) && blob_count) { 3615 copied = 0; 3616 blob_id_ptr = (uint32_t __user *)(unsigned long)out_resp->enum_blob_ptr; 3617 blob_length_ptr = (uint32_t __user *)(unsigned long)out_resp->values_ptr; 3618 3619 list_for_each_entry(prop_blob, &property->enum_blob_list, head) { 3620 if (put_user(prop_blob->base.id, blob_id_ptr + copied)) { 3621 ret = -EFAULT; 3622 goto done; 3623 } 3624 3625 if (put_user(prop_blob->length, blob_length_ptr + copied)) { 3626 ret = -EFAULT; 3627 goto done; 3628 } 3629 3630 copied++; 3631 } 3632 } 3633 out_resp->count_enum_blobs = blob_count; 3634 } 3635done: 3636 drm_modeset_unlock_all(dev); 3637 return ret; 3638} 3639 3640static struct drm_property_blob *drm_property_create_blob(struct drm_device *dev, int length, 3641 void *data) 3642{ 3643 struct drm_property_blob *blob; 3644 int ret; 3645 3646 if (!length || !data) 3647 return NULL; 3648 3649 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 3650 if (!blob) 3651 return NULL; 3652 3653 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 3654 if (ret) { 3655 kfree(blob); 3656 return NULL; 3657 } 3658 3659 blob->length = length; 3660 3661 memcpy(blob->data, data, length); 3662 3663 list_add_tail(&blob->head, &dev->mode_config.property_blob_list); 3664 return blob; 3665} 3666 3667static void drm_property_destroy_blob(struct drm_device *dev, 3668 struct drm_property_blob *blob) 3669{ 3670 drm_mode_object_put(dev, &blob->base); 3671 list_del(&blob->head); 3672 kfree(blob); 3673} 3674 3675/** 3676 * drm_mode_getblob_ioctl - get the contents of a blob property value 3677 * @dev: DRM device 3678 * @data: ioctl data 3679 * @file_priv: DRM file info 3680 * 3681 * This function retrieves the contents of a blob property. The value stored in 3682 * an object's blob property is just a normal modeset object id. 3683 * 3684 * Called by the user via ioctl. 3685 * 3686 * Returns: 3687 * Zero on success, errno on failure. 3688 */ 3689int drm_mode_getblob_ioctl(struct drm_device *dev, 3690 void *data, struct drm_file *file_priv) 3691{ 3692 struct drm_mode_get_blob *out_resp = data; 3693 struct drm_property_blob *blob; 3694 int ret = 0; 3695 void __user *blob_ptr; 3696 3697 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3698 return -EINVAL; 3699 3700 drm_modeset_lock_all(dev); 3701 blob = drm_property_blob_find(dev, out_resp->blob_id); 3702 if (!blob) { 3703 ret = -ENOENT; 3704 goto done; 3705 } 3706 3707 if (out_resp->length == blob->length) { 3708 blob_ptr = (void __user *)(unsigned long)out_resp->data; 3709 if (copy_to_user(blob_ptr, blob->data, blob->length)){ 3710 ret = -EFAULT; 3711 goto done; 3712 } 3713 } 3714 out_resp->length = blob->length; 3715 3716done: 3717 drm_modeset_unlock_all(dev); 3718 return ret; 3719} 3720 3721/** 3722 * drm_mode_connector_update_edid_property - update the edid property of a connector 3723 * @connector: drm connector 3724 * @edid: new value of the edid property 3725 * 3726 * This function creates a new blob modeset object and assigns its id to the 3727 * connector's edid property. 3728 * 3729 * Returns: 3730 * Zero on success, errno on failure. 3731 */ 3732int drm_mode_connector_update_edid_property(struct drm_connector *connector, 3733 struct edid *edid) 3734{ 3735 struct drm_device *dev = connector->dev; 3736 int ret, size; 3737 3738 if (connector->edid_blob_ptr) 3739 drm_property_destroy_blob(dev, connector->edid_blob_ptr); 3740 3741 /* Delete edid, when there is none. */ 3742 if (!edid) { 3743 connector->edid_blob_ptr = NULL; 3744 ret = drm_object_property_set_value(&connector->base, dev->mode_config.edid_property, 0); 3745 return ret; 3746 } 3747 3748 size = EDID_LENGTH * (1 + edid->extensions); 3749 connector->edid_blob_ptr = drm_property_create_blob(connector->dev, 3750 size, edid); 3751 if (!connector->edid_blob_ptr) 3752 return -EINVAL; 3753 3754 ret = drm_object_property_set_value(&connector->base, 3755 dev->mode_config.edid_property, 3756 connector->edid_blob_ptr->base.id); 3757 3758 return ret; 3759} 3760EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 3761 3762static bool drm_property_change_is_valid(struct drm_property *property, 3763 uint64_t value) 3764{ 3765 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 3766 return false; 3767 3768 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 3769 if (value < property->values[0] || value > property->values[1]) 3770 return false; 3771 return true; 3772 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 3773 int64_t svalue = U642I64(value); 3774 if (svalue < U642I64(property->values[0]) || 3775 svalue > U642I64(property->values[1])) 3776 return false; 3777 return true; 3778 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 3779 int i; 3780 uint64_t valid_mask = 0; 3781 for (i = 0; i < property->num_values; i++) 3782 valid_mask |= (1ULL << property->values[i]); 3783 return !(value & ~valid_mask); 3784 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 3785 /* Only the driver knows */ 3786 return true; 3787 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 3788 struct drm_mode_object *obj; 3789 /* a zero value for an object property translates to null: */ 3790 if (value == 0) 3791 return true; 3792 /* 3793 * NOTE: use _object_find() directly to bypass restriction on 3794 * looking up refcnt'd objects (ie. fb's). For a refcnt'd 3795 * object this could race against object finalization, so it 3796 * simply tells us that the object *was* valid. Which is good 3797 * enough. 3798 */ 3799 obj = _object_find(property->dev, value, property->values[0]); 3800 return obj != NULL; 3801 } else { 3802 int i; 3803 for (i = 0; i < property->num_values; i++) 3804 if (property->values[i] == value) 3805 return true; 3806 return false; 3807 } 3808} 3809 3810/** 3811 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 3812 * @dev: DRM device 3813 * @data: ioctl data 3814 * @file_priv: DRM file info 3815 * 3816 * This function sets the current value for a connectors's property. It also 3817 * calls into a driver's ->set_property callback to update the hardware state 3818 * 3819 * Called by the user via ioctl. 3820 * 3821 * Returns: 3822 * Zero on success, errno on failure. 3823 */ 3824int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 3825 void *data, struct drm_file *file_priv) 3826{ 3827 struct drm_mode_connector_set_property *conn_set_prop = data; 3828 struct drm_mode_obj_set_property obj_set_prop = { 3829 .value = conn_set_prop->value, 3830 .prop_id = conn_set_prop->prop_id, 3831 .obj_id = conn_set_prop->connector_id, 3832 .obj_type = DRM_MODE_OBJECT_CONNECTOR 3833 }; 3834 3835 /* It does all the locking and checking we need */ 3836 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 3837} 3838 3839static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 3840 struct drm_property *property, 3841 uint64_t value) 3842{ 3843 int ret = -EINVAL; 3844 struct drm_connector *connector = obj_to_connector(obj); 3845 3846 /* Do DPMS ourselves */ 3847 if (property == connector->dev->mode_config.dpms_property) { 3848 if (connector->funcs->dpms) 3849 (*connector->funcs->dpms)(connector, (int)value); 3850 ret = 0; 3851 } else if (connector->funcs->set_property) 3852 ret = connector->funcs->set_property(connector, property, value); 3853 3854 /* store the property value if successful */ 3855 if (!ret) 3856 drm_object_property_set_value(&connector->base, property, value); 3857 return ret; 3858} 3859 3860static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 3861 struct drm_property *property, 3862 uint64_t value) 3863{ 3864 int ret = -EINVAL; 3865 struct drm_crtc *crtc = obj_to_crtc(obj); 3866 3867 if (crtc->funcs->set_property) 3868 ret = crtc->funcs->set_property(crtc, property, value); 3869 if (!ret) 3870 drm_object_property_set_value(obj, property, value); 3871 3872 return ret; 3873} 3874 3875static int drm_mode_plane_set_obj_prop(struct drm_mode_object *obj, 3876 struct drm_property *property, 3877 uint64_t value) 3878{ 3879 int ret = -EINVAL; 3880 struct drm_plane *plane = obj_to_plane(obj); 3881 3882 if (plane->funcs->set_property) 3883 ret = plane->funcs->set_property(plane, property, value); 3884 if (!ret) 3885 drm_object_property_set_value(obj, property, value); 3886 3887 return ret; 3888} 3889 3890/** 3891 * drm_mode_getproperty_ioctl - get the current value of a object's property 3892 * @dev: DRM device 3893 * @data: ioctl data 3894 * @file_priv: DRM file info 3895 * 3896 * This function retrieves the current value for an object's property. Compared 3897 * to the connector specific ioctl this one is extended to also work on crtc and 3898 * plane objects. 3899 * 3900 * Called by the user via ioctl. 3901 * 3902 * Returns: 3903 * Zero on success, errno on failure. 3904 */ 3905int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 3906 struct drm_file *file_priv) 3907{ 3908 struct drm_mode_obj_get_properties *arg = data; 3909 struct drm_mode_object *obj; 3910 int ret = 0; 3911 int i; 3912 int copied = 0; 3913 int props_count = 0; 3914 uint32_t __user *props_ptr; 3915 uint64_t __user *prop_values_ptr; 3916 3917 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3918 return -EINVAL; 3919 3920 drm_modeset_lock_all(dev); 3921 3922 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 3923 if (!obj) { 3924 ret = -ENOENT; 3925 goto out; 3926 } 3927 if (!obj->properties) { 3928 ret = -EINVAL; 3929 goto out; 3930 } 3931 3932 props_count = obj->properties->count; 3933 3934 /* This ioctl is called twice, once to determine how much space is 3935 * needed, and the 2nd time to fill it. */ 3936 if ((arg->count_props >= props_count) && props_count) { 3937 copied = 0; 3938 props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); 3939 prop_values_ptr = (uint64_t __user *)(unsigned long) 3940 (arg->prop_values_ptr); 3941 for (i = 0; i < props_count; i++) { 3942 if (put_user(obj->properties->ids[i], 3943 props_ptr + copied)) { 3944 ret = -EFAULT; 3945 goto out; 3946 } 3947 if (put_user(obj->properties->values[i], 3948 prop_values_ptr + copied)) { 3949 ret = -EFAULT; 3950 goto out; 3951 } 3952 copied++; 3953 } 3954 } 3955 arg->count_props = props_count; 3956out: 3957 drm_modeset_unlock_all(dev); 3958 return ret; 3959} 3960 3961/** 3962 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 3963 * @dev: DRM device 3964 * @data: ioctl data 3965 * @file_priv: DRM file info 3966 * 3967 * This function sets the current value for an object's property. It also calls 3968 * into a driver's ->set_property callback to update the hardware state. 3969 * Compared to the connector specific ioctl this one is extended to also work on 3970 * crtc and plane objects. 3971 * 3972 * Called by the user via ioctl. 3973 * 3974 * Returns: 3975 * Zero on success, errno on failure. 3976 */ 3977int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 3978 struct drm_file *file_priv) 3979{ 3980 struct drm_mode_obj_set_property *arg = data; 3981 struct drm_mode_object *arg_obj; 3982 struct drm_mode_object *prop_obj; 3983 struct drm_property *property; 3984 int ret = -EINVAL; 3985 int i; 3986 3987 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3988 return -EINVAL; 3989 3990 drm_modeset_lock_all(dev); 3991 3992 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 3993 if (!arg_obj) { 3994 ret = -ENOENT; 3995 goto out; 3996 } 3997 if (!arg_obj->properties) 3998 goto out; 3999 4000 for (i = 0; i < arg_obj->properties->count; i++) 4001 if (arg_obj->properties->ids[i] == arg->prop_id) 4002 break; 4003 4004 if (i == arg_obj->properties->count) 4005 goto out; 4006 4007 prop_obj = drm_mode_object_find(dev, arg->prop_id, 4008 DRM_MODE_OBJECT_PROPERTY); 4009 if (!prop_obj) { 4010 ret = -ENOENT; 4011 goto out; 4012 } 4013 property = obj_to_property(prop_obj); 4014 4015 if (!drm_property_change_is_valid(property, arg->value)) 4016 goto out; 4017 4018 switch (arg_obj->type) { 4019 case DRM_MODE_OBJECT_CONNECTOR: 4020 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 4021 arg->value); 4022 break; 4023 case DRM_MODE_OBJECT_CRTC: 4024 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 4025 break; 4026 case DRM_MODE_OBJECT_PLANE: 4027 ret = drm_mode_plane_set_obj_prop(arg_obj, property, arg->value); 4028 break; 4029 } 4030 4031out: 4032 drm_modeset_unlock_all(dev); 4033 return ret; 4034} 4035 4036/** 4037 * drm_mode_connector_attach_encoder - attach a connector to an encoder 4038 * @connector: connector to attach 4039 * @encoder: encoder to attach @connector to 4040 * 4041 * This function links up a connector to an encoder. Note that the routing 4042 * restrictions between encoders and crtcs are exposed to userspace through the 4043 * possible_clones and possible_crtcs bitmasks. 4044 * 4045 * Returns: 4046 * Zero on success, errno on failure. 4047 */ 4048int drm_mode_connector_attach_encoder(struct drm_connector *connector, 4049 struct drm_encoder *encoder) 4050{ 4051 int i; 4052 4053 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 4054 if (connector->encoder_ids[i] == 0) { 4055 connector->encoder_ids[i] = encoder->base.id; 4056 return 0; 4057 } 4058 } 4059 return -ENOMEM; 4060} 4061EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 4062 4063/** 4064 * drm_mode_crtc_set_gamma_size - set the gamma table size 4065 * @crtc: CRTC to set the gamma table size for 4066 * @gamma_size: size of the gamma table 4067 * 4068 * Drivers which support gamma tables should set this to the supported gamma 4069 * table size when initializing the CRTC. Currently the drm core only supports a 4070 * fixed gamma table size. 4071 * 4072 * Returns: 4073 * Zero on success, errno on failure. 4074 */ 4075int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 4076 int gamma_size) 4077{ 4078 crtc->gamma_size = gamma_size; 4079 4080 crtc->gamma_store = kzalloc(gamma_size * sizeof(uint16_t) * 3, GFP_KERNEL); 4081 if (!crtc->gamma_store) { 4082 crtc->gamma_size = 0; 4083 return -ENOMEM; 4084 } 4085 4086 return 0; 4087} 4088EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 4089 4090/** 4091 * drm_mode_gamma_set_ioctl - set the gamma table 4092 * @dev: DRM device 4093 * @data: ioctl data 4094 * @file_priv: DRM file info 4095 * 4096 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 4097 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 4098 * 4099 * Called by the user via ioctl. 4100 * 4101 * Returns: 4102 * Zero on success, errno on failure. 4103 */ 4104int drm_mode_gamma_set_ioctl(struct drm_device *dev, 4105 void *data, struct drm_file *file_priv) 4106{ 4107 struct drm_mode_crtc_lut *crtc_lut = data; 4108 struct drm_crtc *crtc; 4109 void *r_base, *g_base, *b_base; 4110 int size; 4111 int ret = 0; 4112 4113 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4114 return -EINVAL; 4115 4116 drm_modeset_lock_all(dev); 4117 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 4118 if (!crtc) { 4119 ret = -ENOENT; 4120 goto out; 4121 } 4122 4123 if (crtc->funcs->gamma_set == NULL) { 4124 ret = -ENOSYS; 4125 goto out; 4126 } 4127 4128 /* memcpy into gamma store */ 4129 if (crtc_lut->gamma_size != crtc->gamma_size) { 4130 ret = -EINVAL; 4131 goto out; 4132 } 4133 4134 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 4135 r_base = crtc->gamma_store; 4136 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 4137 ret = -EFAULT; 4138 goto out; 4139 } 4140 4141 g_base = r_base + size; 4142 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 4143 ret = -EFAULT; 4144 goto out; 4145 } 4146 4147 b_base = g_base + size; 4148 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 4149 ret = -EFAULT; 4150 goto out; 4151 } 4152 4153 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 4154 4155out: 4156 drm_modeset_unlock_all(dev); 4157 return ret; 4158 4159} 4160 4161/** 4162 * drm_mode_gamma_get_ioctl - get the gamma table 4163 * @dev: DRM device 4164 * @data: ioctl data 4165 * @file_priv: DRM file info 4166 * 4167 * Copy the current gamma table into the storage provided. This also provides 4168 * the gamma table size the driver expects, which can be used to size the 4169 * allocated storage. 4170 * 4171 * Called by the user via ioctl. 4172 * 4173 * Returns: 4174 * Zero on success, errno on failure. 4175 */ 4176int drm_mode_gamma_get_ioctl(struct drm_device *dev, 4177 void *data, struct drm_file *file_priv) 4178{ 4179 struct drm_mode_crtc_lut *crtc_lut = data; 4180 struct drm_crtc *crtc; 4181 void *r_base, *g_base, *b_base; 4182 int size; 4183 int ret = 0; 4184 4185 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4186 return -EINVAL; 4187 4188 drm_modeset_lock_all(dev); 4189 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 4190 if (!crtc) { 4191 ret = -ENOENT; 4192 goto out; 4193 } 4194 4195 /* memcpy into gamma store */ 4196 if (crtc_lut->gamma_size != crtc->gamma_size) { 4197 ret = -EINVAL; 4198 goto out; 4199 } 4200 4201 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 4202 r_base = crtc->gamma_store; 4203 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 4204 ret = -EFAULT; 4205 goto out; 4206 } 4207 4208 g_base = r_base + size; 4209 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 4210 ret = -EFAULT; 4211 goto out; 4212 } 4213 4214 b_base = g_base + size; 4215 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 4216 ret = -EFAULT; 4217 goto out; 4218 } 4219out: 4220 drm_modeset_unlock_all(dev); 4221 return ret; 4222} 4223 4224/** 4225 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 4226 * @dev: DRM device 4227 * @data: ioctl data 4228 * @file_priv: DRM file info 4229 * 4230 * This schedules an asynchronous update on a given CRTC, called page flip. 4231 * Optionally a drm event is generated to signal the completion of the event. 4232 * Generic drivers cannot assume that a pageflip with changed framebuffer 4233 * properties (including driver specific metadata like tiling layout) will work, 4234 * but some drivers support e.g. pixel format changes through the pageflip 4235 * ioctl. 4236 * 4237 * Called by the user via ioctl. 4238 * 4239 * Returns: 4240 * Zero on success, errno on failure. 4241 */ 4242int drm_mode_page_flip_ioctl(struct drm_device *dev, 4243 void *data, struct drm_file *file_priv) 4244{ 4245 struct drm_mode_crtc_page_flip *page_flip = data; 4246 struct drm_crtc *crtc; 4247 struct drm_framebuffer *fb = NULL, *old_fb = NULL; 4248 struct drm_pending_vblank_event *e = NULL; 4249 unsigned long flags; 4250 int ret = -EINVAL; 4251 4252 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 4253 page_flip->reserved != 0) 4254 return -EINVAL; 4255 4256 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 4257 return -EINVAL; 4258 4259 crtc = drm_crtc_find(dev, page_flip->crtc_id); 4260 if (!crtc) 4261 return -ENOENT; 4262 4263 drm_modeset_lock(&crtc->mutex, NULL); 4264 if (crtc->primary->fb == NULL) { 4265 /* The framebuffer is currently unbound, presumably 4266 * due to a hotplug event, that userspace has not 4267 * yet discovered. 4268 */ 4269 ret = -EBUSY; 4270 goto out; 4271 } 4272 4273 if (crtc->funcs->page_flip == NULL) 4274 goto out; 4275 4276 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 4277 if (!fb) { 4278 ret = -ENOENT; 4279 goto out; 4280 } 4281 4282 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 4283 if (ret) 4284 goto out; 4285 4286 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 4287 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 4288 ret = -EINVAL; 4289 goto out; 4290 } 4291 4292 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 4293 ret = -ENOMEM; 4294 spin_lock_irqsave(&dev->event_lock, flags); 4295 if (file_priv->event_space < sizeof e->event) { 4296 spin_unlock_irqrestore(&dev->event_lock, flags); 4297 goto out; 4298 } 4299 file_priv->event_space -= sizeof e->event; 4300 spin_unlock_irqrestore(&dev->event_lock, flags); 4301 4302 e = kzalloc(sizeof *e, GFP_KERNEL); 4303 if (e == NULL) { 4304 spin_lock_irqsave(&dev->event_lock, flags); 4305 file_priv->event_space += sizeof e->event; 4306 spin_unlock_irqrestore(&dev->event_lock, flags); 4307 goto out; 4308 } 4309 4310 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 4311 e->event.base.length = sizeof e->event; 4312 e->event.user_data = page_flip->user_data; 4313 e->base.event = &e->event.base; 4314 e->base.file_priv = file_priv; 4315 e->base.destroy = 4316 (void (*) (struct drm_pending_event *)) kfree; 4317 } 4318 4319 old_fb = crtc->primary->fb; 4320 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 4321 if (ret) { 4322 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 4323 spin_lock_irqsave(&dev->event_lock, flags); 4324 file_priv->event_space += sizeof e->event; 4325 spin_unlock_irqrestore(&dev->event_lock, flags); 4326 kfree(e); 4327 } 4328 /* Keep the old fb, don't unref it. */ 4329 old_fb = NULL; 4330 } else { 4331 /* 4332 * Warn if the driver hasn't properly updated the crtc->fb 4333 * field to reflect that the new framebuffer is now used. 4334 * Failing to do so will screw with the reference counting 4335 * on framebuffers. 4336 */ 4337 WARN_ON(crtc->primary->fb != fb); 4338 /* Unref only the old framebuffer. */ 4339 fb = NULL; 4340 } 4341 4342out: 4343 if (fb) 4344 drm_framebuffer_unreference(fb); 4345 if (old_fb) 4346 drm_framebuffer_unreference(old_fb); 4347 drm_modeset_unlock(&crtc->mutex); 4348 4349 return ret; 4350} 4351 4352/** 4353 * drm_mode_config_reset - call ->reset callbacks 4354 * @dev: drm device 4355 * 4356 * This functions calls all the crtc's, encoder's and connector's ->reset 4357 * callback. Drivers can use this in e.g. their driver load or resume code to 4358 * reset hardware and software state. 4359 */ 4360void drm_mode_config_reset(struct drm_device *dev) 4361{ 4362 struct drm_crtc *crtc; 4363 struct drm_encoder *encoder; 4364 struct drm_connector *connector; 4365 4366 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 4367 if (crtc->funcs->reset) 4368 crtc->funcs->reset(crtc); 4369 4370 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 4371 if (encoder->funcs->reset) 4372 encoder->funcs->reset(encoder); 4373 4374 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 4375 connector->status = connector_status_unknown; 4376 4377 if (connector->funcs->reset) 4378 connector->funcs->reset(connector); 4379 } 4380} 4381EXPORT_SYMBOL(drm_mode_config_reset); 4382 4383/** 4384 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 4385 * @dev: DRM device 4386 * @data: ioctl data 4387 * @file_priv: DRM file info 4388 * 4389 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 4390 * TTM or something else entirely) and returns the resulting buffer handle. This 4391 * handle can then be wrapped up into a framebuffer modeset object. 4392 * 4393 * Note that userspace is not allowed to use such objects for render 4394 * acceleration - drivers must create their own private ioctls for such a use 4395 * case. 4396 * 4397 * Called by the user via ioctl. 4398 * 4399 * Returns: 4400 * Zero on success, errno on failure. 4401 */ 4402int drm_mode_create_dumb_ioctl(struct drm_device *dev, 4403 void *data, struct drm_file *file_priv) 4404{ 4405 struct drm_mode_create_dumb *args = data; 4406 u32 cpp, stride, size; 4407 4408 if (!dev->driver->dumb_create) 4409 return -ENOSYS; 4410 if (!args->width || !args->height || !args->bpp) 4411 return -EINVAL; 4412 4413 /* overflow checks for 32bit size calculations */ 4414 cpp = DIV_ROUND_UP(args->bpp, 8); 4415 if (cpp > 0xffffffffU / args->width) 4416 return -EINVAL; 4417 stride = cpp * args->width; 4418 if (args->height > 0xffffffffU / stride) 4419 return -EINVAL; 4420 4421 /* test for wrap-around */ 4422 size = args->height * stride; 4423 if (PAGE_ALIGN(size) == 0) 4424 return -EINVAL; 4425 4426 return dev->driver->dumb_create(file_priv, dev, args); 4427} 4428 4429/** 4430 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 4431 * @dev: DRM device 4432 * @data: ioctl data 4433 * @file_priv: DRM file info 4434 * 4435 * Allocate an offset in the drm device node's address space to be able to 4436 * memory map a dumb buffer. 4437 * 4438 * Called by the user via ioctl. 4439 * 4440 * Returns: 4441 * Zero on success, errno on failure. 4442 */ 4443int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 4444 void *data, struct drm_file *file_priv) 4445{ 4446 struct drm_mode_map_dumb *args = data; 4447 4448 /* call driver ioctl to get mmap offset */ 4449 if (!dev->driver->dumb_map_offset) 4450 return -ENOSYS; 4451 4452 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 4453} 4454 4455/** 4456 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 4457 * @dev: DRM device 4458 * @data: ioctl data 4459 * @file_priv: DRM file info 4460 * 4461 * This destroys the userspace handle for the given dumb backing storage buffer. 4462 * Since buffer objects must be reference counted in the kernel a buffer object 4463 * won't be immediately freed if a framebuffer modeset object still uses it. 4464 * 4465 * Called by the user via ioctl. 4466 * 4467 * Returns: 4468 * Zero on success, errno on failure. 4469 */ 4470int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 4471 void *data, struct drm_file *file_priv) 4472{ 4473 struct drm_mode_destroy_dumb *args = data; 4474 4475 if (!dev->driver->dumb_destroy) 4476 return -ENOSYS; 4477 4478 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 4479} 4480 4481/** 4482 * drm_fb_get_bpp_depth - get the bpp/depth values for format 4483 * @format: pixel format (DRM_FORMAT_*) 4484 * @depth: storage for the depth value 4485 * @bpp: storage for the bpp value 4486 * 4487 * This only supports RGB formats here for compat with code that doesn't use 4488 * pixel formats directly yet. 4489 */ 4490void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 4491 int *bpp) 4492{ 4493 switch (format) { 4494 case DRM_FORMAT_C8: 4495 case DRM_FORMAT_RGB332: 4496 case DRM_FORMAT_BGR233: 4497 *depth = 8; 4498 *bpp = 8; 4499 break; 4500 case DRM_FORMAT_XRGB1555: 4501 case DRM_FORMAT_XBGR1555: 4502 case DRM_FORMAT_RGBX5551: 4503 case DRM_FORMAT_BGRX5551: 4504 case DRM_FORMAT_ARGB1555: 4505 case DRM_FORMAT_ABGR1555: 4506 case DRM_FORMAT_RGBA5551: 4507 case DRM_FORMAT_BGRA5551: 4508 *depth = 15; 4509 *bpp = 16; 4510 break; 4511 case DRM_FORMAT_RGB565: 4512 case DRM_FORMAT_BGR565: 4513 *depth = 16; 4514 *bpp = 16; 4515 break; 4516 case DRM_FORMAT_RGB888: 4517 case DRM_FORMAT_BGR888: 4518 *depth = 24; 4519 *bpp = 24; 4520 break; 4521 case DRM_FORMAT_XRGB8888: 4522 case DRM_FORMAT_XBGR8888: 4523 case DRM_FORMAT_RGBX8888: 4524 case DRM_FORMAT_BGRX8888: 4525 *depth = 24; 4526 *bpp = 32; 4527 break; 4528 case DRM_FORMAT_XRGB2101010: 4529 case DRM_FORMAT_XBGR2101010: 4530 case DRM_FORMAT_RGBX1010102: 4531 case DRM_FORMAT_BGRX1010102: 4532 case DRM_FORMAT_ARGB2101010: 4533 case DRM_FORMAT_ABGR2101010: 4534 case DRM_FORMAT_RGBA1010102: 4535 case DRM_FORMAT_BGRA1010102: 4536 *depth = 30; 4537 *bpp = 32; 4538 break; 4539 case DRM_FORMAT_ARGB8888: 4540 case DRM_FORMAT_ABGR8888: 4541 case DRM_FORMAT_RGBA8888: 4542 case DRM_FORMAT_BGRA8888: 4543 *depth = 32; 4544 *bpp = 32; 4545 break; 4546 default: 4547 DRM_DEBUG_KMS("unsupported pixel format %s\n", 4548 drm_get_format_name(format)); 4549 *depth = 0; 4550 *bpp = 0; 4551 break; 4552 } 4553} 4554EXPORT_SYMBOL(drm_fb_get_bpp_depth); 4555 4556/** 4557 * drm_format_num_planes - get the number of planes for format 4558 * @format: pixel format (DRM_FORMAT_*) 4559 * 4560 * Returns: 4561 * The number of planes used by the specified pixel format. 4562 */ 4563int drm_format_num_planes(uint32_t format) 4564{ 4565 switch (format) { 4566 case DRM_FORMAT_YUV410: 4567 case DRM_FORMAT_YVU410: 4568 case DRM_FORMAT_YUV411: 4569 case DRM_FORMAT_YVU411: 4570 case DRM_FORMAT_YUV420: 4571 case DRM_FORMAT_YVU420: 4572 case DRM_FORMAT_YUV422: 4573 case DRM_FORMAT_YVU422: 4574 case DRM_FORMAT_YUV444: 4575 case DRM_FORMAT_YVU444: 4576 return 3; 4577 case DRM_FORMAT_NV12: 4578 case DRM_FORMAT_NV21: 4579 case DRM_FORMAT_NV16: 4580 case DRM_FORMAT_NV61: 4581 case DRM_FORMAT_NV24: 4582 case DRM_FORMAT_NV42: 4583 return 2; 4584 default: 4585 return 1; 4586 } 4587} 4588EXPORT_SYMBOL(drm_format_num_planes); 4589 4590/** 4591 * drm_format_plane_cpp - determine the bytes per pixel value 4592 * @format: pixel format (DRM_FORMAT_*) 4593 * @plane: plane index 4594 * 4595 * Returns: 4596 * The bytes per pixel value for the specified plane. 4597 */ 4598int drm_format_plane_cpp(uint32_t format, int plane) 4599{ 4600 unsigned int depth; 4601 int bpp; 4602 4603 if (plane >= drm_format_num_planes(format)) 4604 return 0; 4605 4606 switch (format) { 4607 case DRM_FORMAT_YUYV: 4608 case DRM_FORMAT_YVYU: 4609 case DRM_FORMAT_UYVY: 4610 case DRM_FORMAT_VYUY: 4611 return 2; 4612 case DRM_FORMAT_NV12: 4613 case DRM_FORMAT_NV21: 4614 case DRM_FORMAT_NV16: 4615 case DRM_FORMAT_NV61: 4616 case DRM_FORMAT_NV24: 4617 case DRM_FORMAT_NV42: 4618 return plane ? 2 : 1; 4619 case DRM_FORMAT_YUV410: 4620 case DRM_FORMAT_YVU410: 4621 case DRM_FORMAT_YUV411: 4622 case DRM_FORMAT_YVU411: 4623 case DRM_FORMAT_YUV420: 4624 case DRM_FORMAT_YVU420: 4625 case DRM_FORMAT_YUV422: 4626 case DRM_FORMAT_YVU422: 4627 case DRM_FORMAT_YUV444: 4628 case DRM_FORMAT_YVU444: 4629 return 1; 4630 default: 4631 drm_fb_get_bpp_depth(format, &depth, &bpp); 4632 return bpp >> 3; 4633 } 4634} 4635EXPORT_SYMBOL(drm_format_plane_cpp); 4636 4637/** 4638 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 4639 * @format: pixel format (DRM_FORMAT_*) 4640 * 4641 * Returns: 4642 * The horizontal chroma subsampling factor for the 4643 * specified pixel format. 4644 */ 4645int drm_format_horz_chroma_subsampling(uint32_t format) 4646{ 4647 switch (format) { 4648 case DRM_FORMAT_YUV411: 4649 case DRM_FORMAT_YVU411: 4650 case DRM_FORMAT_YUV410: 4651 case DRM_FORMAT_YVU410: 4652 return 4; 4653 case DRM_FORMAT_YUYV: 4654 case DRM_FORMAT_YVYU: 4655 case DRM_FORMAT_UYVY: 4656 case DRM_FORMAT_VYUY: 4657 case DRM_FORMAT_NV12: 4658 case DRM_FORMAT_NV21: 4659 case DRM_FORMAT_NV16: 4660 case DRM_FORMAT_NV61: 4661 case DRM_FORMAT_YUV422: 4662 case DRM_FORMAT_YVU422: 4663 case DRM_FORMAT_YUV420: 4664 case DRM_FORMAT_YVU420: 4665 return 2; 4666 default: 4667 return 1; 4668 } 4669} 4670EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 4671 4672/** 4673 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 4674 * @format: pixel format (DRM_FORMAT_*) 4675 * 4676 * Returns: 4677 * The vertical chroma subsampling factor for the 4678 * specified pixel format. 4679 */ 4680int drm_format_vert_chroma_subsampling(uint32_t format) 4681{ 4682 switch (format) { 4683 case DRM_FORMAT_YUV410: 4684 case DRM_FORMAT_YVU410: 4685 return 4; 4686 case DRM_FORMAT_YUV420: 4687 case DRM_FORMAT_YVU420: 4688 case DRM_FORMAT_NV12: 4689 case DRM_FORMAT_NV21: 4690 return 2; 4691 default: 4692 return 1; 4693 } 4694} 4695EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 4696 4697/** 4698 * drm_mode_config_init - initialize DRM mode_configuration structure 4699 * @dev: DRM device 4700 * 4701 * Initialize @dev's mode_config structure, used for tracking the graphics 4702 * configuration of @dev. 4703 * 4704 * Since this initializes the modeset locks, no locking is possible. Which is no 4705 * problem, since this should happen single threaded at init time. It is the 4706 * driver's problem to ensure this guarantee. 4707 * 4708 */ 4709void drm_mode_config_init(struct drm_device *dev) 4710{ 4711 mutex_init(&dev->mode_config.mutex); 4712 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 4713 mutex_init(&dev->mode_config.idr_mutex); 4714 mutex_init(&dev->mode_config.fb_lock); 4715 INIT_LIST_HEAD(&dev->mode_config.fb_list); 4716 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 4717 INIT_LIST_HEAD(&dev->mode_config.connector_list); 4718 INIT_LIST_HEAD(&dev->mode_config.bridge_list); 4719 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 4720 INIT_LIST_HEAD(&dev->mode_config.property_list); 4721 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 4722 INIT_LIST_HEAD(&dev->mode_config.plane_list); 4723 idr_init(&dev->mode_config.crtc_idr); 4724 4725 drm_modeset_lock_all(dev); 4726 drm_mode_create_standard_connector_properties(dev); 4727 drm_mode_create_standard_plane_properties(dev); 4728 drm_modeset_unlock_all(dev); 4729 4730 /* Just to be sure */ 4731 dev->mode_config.num_fb = 0; 4732 dev->mode_config.num_connector = 0; 4733 dev->mode_config.num_crtc = 0; 4734 dev->mode_config.num_encoder = 0; 4735 dev->mode_config.num_overlay_plane = 0; 4736 dev->mode_config.num_total_plane = 0; 4737} 4738EXPORT_SYMBOL(drm_mode_config_init); 4739 4740/** 4741 * drm_mode_config_cleanup - free up DRM mode_config info 4742 * @dev: DRM device 4743 * 4744 * Free up all the connectors and CRTCs associated with this DRM device, then 4745 * free up the framebuffers and associated buffer objects. 4746 * 4747 * Note that since this /should/ happen single-threaded at driver/device 4748 * teardown time, no locking is required. It's the driver's job to ensure that 4749 * this guarantee actually holds true. 4750 * 4751 * FIXME: cleanup any dangling user buffer objects too 4752 */ 4753void drm_mode_config_cleanup(struct drm_device *dev) 4754{ 4755 struct drm_connector *connector, *ot; 4756 struct drm_crtc *crtc, *ct; 4757 struct drm_encoder *encoder, *enct; 4758 struct drm_bridge *bridge, *brt; 4759 struct drm_framebuffer *fb, *fbt; 4760 struct drm_property *property, *pt; 4761 struct drm_property_blob *blob, *bt; 4762 struct drm_plane *plane, *plt; 4763 4764 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 4765 head) { 4766 encoder->funcs->destroy(encoder); 4767 } 4768 4769 list_for_each_entry_safe(bridge, brt, 4770 &dev->mode_config.bridge_list, head) { 4771 bridge->funcs->destroy(bridge); 4772 } 4773 4774 list_for_each_entry_safe(connector, ot, 4775 &dev->mode_config.connector_list, head) { 4776 connector->funcs->destroy(connector); 4777 } 4778 4779 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 4780 head) { 4781 drm_property_destroy(dev, property); 4782 } 4783 4784 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 4785 head) { 4786 drm_property_destroy_blob(dev, blob); 4787 } 4788 4789 /* 4790 * Single-threaded teardown context, so it's not required to grab the 4791 * fb_lock to protect against concurrent fb_list access. Contrary, it 4792 * would actually deadlock with the drm_framebuffer_cleanup function. 4793 * 4794 * Also, if there are any framebuffers left, that's a driver leak now, 4795 * so politely WARN about this. 4796 */ 4797 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 4798 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 4799 drm_framebuffer_remove(fb); 4800 } 4801 4802 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 4803 head) { 4804 plane->funcs->destroy(plane); 4805 } 4806 4807 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 4808 crtc->funcs->destroy(crtc); 4809 } 4810 4811 idr_destroy(&dev->mode_config.crtc_idr); 4812 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 4813} 4814EXPORT_SYMBOL(drm_mode_config_cleanup); 4815