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