1/* 2 * Copyright (c) 2006-2008 Intel Corporation 3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 4 * Copyright (c) 2008 Red Hat Inc. 5 * 6 * DRM core CRTC related functions 7 * 8 * Permission to use, copy, modify, distribute, and sell this software and its 9 * documentation for any purpose is hereby granted without fee, provided that 10 * the above copyright notice appear in all copies and that both that copyright 11 * notice and this permission notice appear in supporting documentation, and 12 * that the name of the copyright holders not be used in advertising or 13 * publicity pertaining to distribution of the software without specific, 14 * written prior permission. The copyright holders make no representations 15 * about the suitability of this software for any purpose. It is provided "as 16 * is" without express or implied warranty. 17 * 18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 24 * OF THIS SOFTWARE. 25 * 26 * Authors: 27 * Keith Packard 28 * Eric Anholt <eric@anholt.net> 29 * Dave Airlie <airlied@linux.ie> 30 * Jesse Barnes <jesse.barnes@intel.com> 31 */ 32#include <linux/ctype.h> 33#include <linux/list.h> 34#include <linux/slab.h> 35#include <linux/export.h> 36#include <drm/drmP.h> 37#include <drm/drm_crtc.h> 38#include <drm/drm_edid.h> 39#include <drm/drm_fourcc.h> 40#include <drm/drm_modeset_lock.h> 41 42#include "drm_crtc_internal.h" 43#include "drm_internal.h" 44 45static struct drm_framebuffer *add_framebuffer_internal(struct drm_device *dev, 46 struct drm_mode_fb_cmd2 *r, 47 struct drm_file *file_priv); 48 49/* Avoid boilerplate. I'm tired of typing. */ 50#define DRM_ENUM_NAME_FN(fnname, list) \ 51 const char *fnname(int val) \ 52 { \ 53 int i; \ 54 for (i = 0; i < ARRAY_SIZE(list); i++) { \ 55 if (list[i].type == val) \ 56 return list[i].name; \ 57 } \ 58 return "(unknown)"; \ 59 } 60 61/* 62 * Global properties 63 */ 64static const struct drm_prop_enum_list drm_dpms_enum_list[] = 65{ { DRM_MODE_DPMS_ON, "On" }, 66 { DRM_MODE_DPMS_STANDBY, "Standby" }, 67 { DRM_MODE_DPMS_SUSPEND, "Suspend" }, 68 { DRM_MODE_DPMS_OFF, "Off" } 69}; 70 71DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) 72 73static const struct drm_prop_enum_list drm_plane_type_enum_list[] = 74{ 75 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 76 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 77 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 78}; 79 80/* 81 * Optional properties 82 */ 83static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = 84{ 85 { DRM_MODE_SCALE_NONE, "None" }, 86 { DRM_MODE_SCALE_FULLSCREEN, "Full" }, 87 { DRM_MODE_SCALE_CENTER, "Center" }, 88 { DRM_MODE_SCALE_ASPECT, "Full aspect" }, 89}; 90 91static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { 92 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, 93 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, 94 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, 95}; 96 97/* 98 * Non-global properties, but "required" for certain connectors. 99 */ 100static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = 101{ 102 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 103 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 104 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 105}; 106 107DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) 108 109static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = 110{ 111 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 112 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 113 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 114}; 115 116DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, 117 drm_dvi_i_subconnector_enum_list) 118 119static const struct drm_prop_enum_list drm_tv_select_enum_list[] = 120{ 121 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 122 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 123 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 124 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 125 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 126}; 127 128DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) 129 130static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = 131{ 132 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 133 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 134 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 135 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 136 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 137}; 138 139DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, 140 drm_tv_subconnector_enum_list) 141 142static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = { 143 { DRM_MODE_DIRTY_OFF, "Off" }, 144 { DRM_MODE_DIRTY_ON, "On" }, 145 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" }, 146}; 147 148struct drm_conn_prop_enum_list { 149 int type; 150 const char *name; 151 struct ida ida; 152}; 153 154/* 155 * Connector and encoder types. 156 */ 157static struct drm_conn_prop_enum_list drm_connector_enum_list[] = 158{ { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, 159 { DRM_MODE_CONNECTOR_VGA, "VGA" }, 160 { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, 161 { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, 162 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, 163 { DRM_MODE_CONNECTOR_Composite, "Composite" }, 164 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, 165 { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, 166 { DRM_MODE_CONNECTOR_Component, "Component" }, 167 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, 168 { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, 169 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, 170 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, 171 { DRM_MODE_CONNECTOR_TV, "TV" }, 172 { DRM_MODE_CONNECTOR_eDP, "eDP" }, 173 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, 174 { DRM_MODE_CONNECTOR_DSI, "DSI" }, 175}; 176 177static const struct drm_prop_enum_list drm_encoder_enum_list[] = 178{ { DRM_MODE_ENCODER_NONE, "None" }, 179 { DRM_MODE_ENCODER_DAC, "DAC" }, 180 { DRM_MODE_ENCODER_TMDS, "TMDS" }, 181 { DRM_MODE_ENCODER_LVDS, "LVDS" }, 182 { DRM_MODE_ENCODER_TVDAC, "TV" }, 183 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" }, 184 { DRM_MODE_ENCODER_DSI, "DSI" }, 185 { DRM_MODE_ENCODER_DPMST, "DP MST" }, 186}; 187 188static const struct drm_prop_enum_list drm_subpixel_enum_list[] = 189{ 190 { SubPixelUnknown, "Unknown" }, 191 { SubPixelHorizontalRGB, "Horizontal RGB" }, 192 { SubPixelHorizontalBGR, "Horizontal BGR" }, 193 { SubPixelVerticalRGB, "Vertical RGB" }, 194 { SubPixelVerticalBGR, "Vertical BGR" }, 195 { SubPixelNone, "None" }, 196}; 197 198void drm_connector_ida_init(void) 199{ 200 int i; 201 202 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 203 ida_init(&drm_connector_enum_list[i].ida); 204} 205 206void drm_connector_ida_destroy(void) 207{ 208 int i; 209 210 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 211 ida_destroy(&drm_connector_enum_list[i].ida); 212} 213 214/** 215 * drm_get_connector_status_name - return a string for connector status 216 * @status: connector status to compute name of 217 * 218 * In contrast to the other drm_get_*_name functions this one here returns a 219 * const pointer and hence is threadsafe. 220 */ 221const char *drm_get_connector_status_name(enum drm_connector_status status) 222{ 223 if (status == connector_status_connected) 224 return "connected"; 225 else if (status == connector_status_disconnected) 226 return "disconnected"; 227 else 228 return "unknown"; 229} 230EXPORT_SYMBOL(drm_get_connector_status_name); 231 232/** 233 * drm_get_subpixel_order_name - return a string for a given subpixel enum 234 * @order: enum of subpixel_order 235 * 236 * Note you could abuse this and return something out of bounds, but that 237 * would be a caller error. No unscrubbed user data should make it here. 238 */ 239const char *drm_get_subpixel_order_name(enum subpixel_order order) 240{ 241 return drm_subpixel_enum_list[order].name; 242} 243EXPORT_SYMBOL(drm_get_subpixel_order_name); 244 245static char printable_char(int c) 246{ 247 return isascii(c) && isprint(c) ? c : '?'; 248} 249 250/** 251 * drm_get_format_name - return a string for drm fourcc format 252 * @format: format to compute name of 253 * 254 * Note that the buffer used by this function is globally shared and owned by 255 * the function itself. 256 * 257 * FIXME: This isn't really multithreading safe. 258 */ 259const char *drm_get_format_name(uint32_t format) 260{ 261 static char buf[32]; 262 263 snprintf(buf, sizeof(buf), 264 "%c%c%c%c %s-endian (0x%08x)", 265 printable_char(format & 0xff), 266 printable_char((format >> 8) & 0xff), 267 printable_char((format >> 16) & 0xff), 268 printable_char((format >> 24) & 0x7f), 269 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", 270 format); 271 272 return buf; 273} 274EXPORT_SYMBOL(drm_get_format_name); 275 276/* 277 * Internal function to assign a slot in the object idr and optionally 278 * register the object into the idr. 279 */ 280static int drm_mode_object_get_reg(struct drm_device *dev, 281 struct drm_mode_object *obj, 282 uint32_t obj_type, 283 bool register_obj) 284{ 285 int ret; 286 287 mutex_lock(&dev->mode_config.idr_mutex); 288 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); 289 if (ret >= 0) { 290 /* 291 * Set up the object linking under the protection of the idr 292 * lock so that other users can't see inconsistent state. 293 */ 294 obj->id = ret; 295 obj->type = obj_type; 296 } 297 mutex_unlock(&dev->mode_config.idr_mutex); 298 299 return ret < 0 ? ret : 0; 300} 301 302/** 303 * drm_mode_object_get - allocate a new modeset identifier 304 * @dev: DRM device 305 * @obj: object pointer, used to generate unique ID 306 * @obj_type: object type 307 * 308 * Create a unique identifier based on @ptr in @dev's identifier space. Used 309 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix 310 * modeset identifiers are _not_ reference counted. Hence don't use this for 311 * reference counted modeset objects like framebuffers. 312 * 313 * Returns: 314 * New unique (relative to other objects in @dev) integer identifier for the 315 * object. 316 */ 317int drm_mode_object_get(struct drm_device *dev, 318 struct drm_mode_object *obj, uint32_t obj_type) 319{ 320 return drm_mode_object_get_reg(dev, obj, obj_type, true); 321} 322 323static void drm_mode_object_register(struct drm_device *dev, 324 struct drm_mode_object *obj) 325{ 326 mutex_lock(&dev->mode_config.idr_mutex); 327 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); 328 mutex_unlock(&dev->mode_config.idr_mutex); 329} 330 331/** 332 * drm_mode_object_put - free a modeset identifer 333 * @dev: DRM device 334 * @object: object to free 335 * 336 * Free @id from @dev's unique identifier pool. Note that despite the _get 337 * postfix modeset identifiers are _not_ reference counted. Hence don't use this 338 * for reference counted modeset objects like framebuffers. 339 */ 340void drm_mode_object_put(struct drm_device *dev, 341 struct drm_mode_object *object) 342{ 343 mutex_lock(&dev->mode_config.idr_mutex); 344 idr_remove(&dev->mode_config.crtc_idr, object->id); 345 mutex_unlock(&dev->mode_config.idr_mutex); 346} 347 348static struct drm_mode_object *_object_find(struct drm_device *dev, 349 uint32_t id, uint32_t type) 350{ 351 struct drm_mode_object *obj = NULL; 352 353 mutex_lock(&dev->mode_config.idr_mutex); 354 obj = idr_find(&dev->mode_config.crtc_idr, id); 355 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) 356 obj = NULL; 357 if (obj && obj->id != id) 358 obj = NULL; 359 /* don't leak out unref'd fb's */ 360 if (obj && (obj->type == DRM_MODE_OBJECT_FB)) 361 obj = NULL; 362 mutex_unlock(&dev->mode_config.idr_mutex); 363 364 return obj; 365} 366 367/** 368 * drm_mode_object_find - look up a drm object with static lifetime 369 * @dev: drm device 370 * @id: id of the mode object 371 * @type: type of the mode object 372 * 373 * Note that framebuffers cannot be looked up with this functions - since those 374 * are reference counted, they need special treatment. Even with 375 * DRM_MODE_OBJECT_ANY (although that will simply return NULL 376 * rather than WARN_ON()). 377 */ 378struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, 379 uint32_t id, uint32_t type) 380{ 381 struct drm_mode_object *obj = NULL; 382 383 /* Framebuffers are reference counted and need their own lookup 384 * function.*/ 385 WARN_ON(type == DRM_MODE_OBJECT_FB); 386 obj = _object_find(dev, id, type); 387 return obj; 388} 389EXPORT_SYMBOL(drm_mode_object_find); 390 391/** 392 * drm_framebuffer_init - initialize a framebuffer 393 * @dev: DRM device 394 * @fb: framebuffer to be initialized 395 * @funcs: ... with these functions 396 * 397 * Allocates an ID for the framebuffer's parent mode object, sets its mode 398 * functions & device file and adds it to the master fd list. 399 * 400 * IMPORTANT: 401 * This functions publishes the fb and makes it available for concurrent access 402 * by other users. Which means by this point the fb _must_ be fully set up - 403 * since all the fb attributes are invariant over its lifetime, no further 404 * locking but only correct reference counting is required. 405 * 406 * Returns: 407 * Zero on success, error code on failure. 408 */ 409int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, 410 const struct drm_framebuffer_funcs *funcs) 411{ 412 int ret; 413 414 mutex_lock(&dev->mode_config.fb_lock); 415 kref_init(&fb->refcount); 416 INIT_LIST_HEAD(&fb->filp_head); 417 fb->dev = dev; 418 fb->funcs = funcs; 419 420 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB); 421 if (ret) 422 goto out; 423 424 dev->mode_config.num_fb++; 425 list_add(&fb->head, &dev->mode_config.fb_list); 426out: 427 mutex_unlock(&dev->mode_config.fb_lock); 428 429 return 0; 430} 431EXPORT_SYMBOL(drm_framebuffer_init); 432 433/* dev->mode_config.fb_lock must be held! */ 434static void __drm_framebuffer_unregister(struct drm_device *dev, 435 struct drm_framebuffer *fb) 436{ 437 mutex_lock(&dev->mode_config.idr_mutex); 438 idr_remove(&dev->mode_config.crtc_idr, fb->base.id); 439 mutex_unlock(&dev->mode_config.idr_mutex); 440 441 fb->base.id = 0; 442} 443 444static void drm_framebuffer_free(struct kref *kref) 445{ 446 struct drm_framebuffer *fb = 447 container_of(kref, struct drm_framebuffer, refcount); 448 struct drm_device *dev = fb->dev; 449 450 /* 451 * The lookup idr holds a weak reference, which has not necessarily been 452 * removed at this point. Check for that. 453 */ 454 mutex_lock(&dev->mode_config.fb_lock); 455 if (fb->base.id) { 456 /* Mark fb as reaped and drop idr ref. */ 457 __drm_framebuffer_unregister(dev, fb); 458 } 459 mutex_unlock(&dev->mode_config.fb_lock); 460 461 fb->funcs->destroy(fb); 462} 463 464static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev, 465 uint32_t id) 466{ 467 struct drm_mode_object *obj = NULL; 468 struct drm_framebuffer *fb; 469 470 mutex_lock(&dev->mode_config.idr_mutex); 471 obj = idr_find(&dev->mode_config.crtc_idr, id); 472 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id)) 473 fb = NULL; 474 else 475 fb = obj_to_fb(obj); 476 mutex_unlock(&dev->mode_config.idr_mutex); 477 478 return fb; 479} 480 481/** 482 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference 483 * @dev: drm device 484 * @id: id of the fb object 485 * 486 * If successful, this grabs an additional reference to the framebuffer - 487 * callers need to make sure to eventually unreference the returned framebuffer 488 * again, using @drm_framebuffer_unreference. 489 */ 490struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, 491 uint32_t id) 492{ 493 struct drm_framebuffer *fb; 494 495 mutex_lock(&dev->mode_config.fb_lock); 496 fb = __drm_framebuffer_lookup(dev, id); 497 if (fb) { 498 if (!kref_get_unless_zero(&fb->refcount)) 499 fb = NULL; 500 } 501 mutex_unlock(&dev->mode_config.fb_lock); 502 503 return fb; 504} 505EXPORT_SYMBOL(drm_framebuffer_lookup); 506 507/** 508 * drm_framebuffer_unreference - unref a framebuffer 509 * @fb: framebuffer to unref 510 * 511 * This functions decrements the fb's refcount and frees it if it drops to zero. 512 */ 513void drm_framebuffer_unreference(struct drm_framebuffer *fb) 514{ 515 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 516 kref_put(&fb->refcount, drm_framebuffer_free); 517} 518EXPORT_SYMBOL(drm_framebuffer_unreference); 519 520/** 521 * drm_framebuffer_reference - incr the fb refcnt 522 * @fb: framebuffer 523 * 524 * This functions increments the fb's refcount. 525 */ 526void drm_framebuffer_reference(struct drm_framebuffer *fb) 527{ 528 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 529 kref_get(&fb->refcount); 530} 531EXPORT_SYMBOL(drm_framebuffer_reference); 532 533static void drm_framebuffer_free_bug(struct kref *kref) 534{ 535 BUG(); 536} 537 538static void __drm_framebuffer_unreference(struct drm_framebuffer *fb) 539{ 540 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 541 kref_put(&fb->refcount, drm_framebuffer_free_bug); 542} 543 544/** 545 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr 546 * @fb: fb to unregister 547 * 548 * Drivers need to call this when cleaning up driver-private framebuffers, e.g. 549 * those used for fbdev. Note that the caller must hold a reference of it's own, 550 * i.e. the object may not be destroyed through this call (since it'll lead to a 551 * locking inversion). 552 */ 553void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) 554{ 555 struct drm_device *dev = fb->dev; 556 557 mutex_lock(&dev->mode_config.fb_lock); 558 /* Mark fb as reaped and drop idr ref. */ 559 __drm_framebuffer_unregister(dev, fb); 560 mutex_unlock(&dev->mode_config.fb_lock); 561} 562EXPORT_SYMBOL(drm_framebuffer_unregister_private); 563 564/** 565 * drm_framebuffer_cleanup - remove a framebuffer object 566 * @fb: framebuffer to remove 567 * 568 * Cleanup framebuffer. This function is intended to be used from the drivers 569 * ->destroy callback. It can also be used to clean up driver private 570 * framebuffers embedded into a larger structure. 571 * 572 * Note that this function does not remove the fb from active usuage - if it is 573 * still used anywhere, hilarity can ensue since userspace could call getfb on 574 * the id and get back -EINVAL. Obviously no concern at driver unload time. 575 * 576 * Also, the framebuffer will not be removed from the lookup idr - for 577 * user-created framebuffers this will happen in in the rmfb ioctl. For 578 * driver-private objects (e.g. for fbdev) drivers need to explicitly call 579 * drm_framebuffer_unregister_private. 580 */ 581void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 582{ 583 struct drm_device *dev = fb->dev; 584 585 mutex_lock(&dev->mode_config.fb_lock); 586 list_del(&fb->head); 587 dev->mode_config.num_fb--; 588 mutex_unlock(&dev->mode_config.fb_lock); 589} 590EXPORT_SYMBOL(drm_framebuffer_cleanup); 591 592/** 593 * drm_framebuffer_remove - remove and unreference a framebuffer object 594 * @fb: framebuffer to remove 595 * 596 * Scans all the CRTCs and planes in @dev's mode_config. If they're 597 * using @fb, removes it, setting it to NULL. Then drops the reference to the 598 * passed-in framebuffer. Might take the modeset locks. 599 * 600 * Note that this function optimizes the cleanup away if the caller holds the 601 * last reference to the framebuffer. It is also guaranteed to not take the 602 * modeset locks in this case. 603 */ 604void drm_framebuffer_remove(struct drm_framebuffer *fb) 605{ 606 struct drm_device *dev = fb->dev; 607 struct drm_crtc *crtc; 608 struct drm_plane *plane; 609 struct drm_mode_set set; 610 int ret; 611 612 WARN_ON(!list_empty(&fb->filp_head)); 613 614 /* 615 * drm ABI mandates that we remove any deleted framebuffers from active 616 * useage. But since most sane clients only remove framebuffers they no 617 * longer need, try to optimize this away. 618 * 619 * Since we're holding a reference ourselves, observing a refcount of 1 620 * means that we're the last holder and can skip it. Also, the refcount 621 * can never increase from 1 again, so we don't need any barriers or 622 * locks. 623 * 624 * Note that userspace could try to race with use and instate a new 625 * usage _after_ we've cleared all current ones. End result will be an 626 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot 627 * in this manner. 628 */ 629 if (atomic_read(&fb->refcount.refcount) > 1) { 630 drm_modeset_lock_all(dev); 631 /* remove from any CRTC */ 632 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 633 if (crtc->primary->fb == fb) { 634 /* should turn off the crtc */ 635 memset(&set, 0, sizeof(struct drm_mode_set)); 636 set.crtc = crtc; 637 set.fb = NULL; 638 ret = drm_mode_set_config_internal(&set); 639 if (ret) 640 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); 641 } 642 } 643 644 list_for_each_entry(plane, &dev->mode_config.plane_list, head) { 645 if (plane->fb == fb) 646 drm_plane_force_disable(plane); 647 } 648 drm_modeset_unlock_all(dev); 649 } 650 651 drm_framebuffer_unreference(fb); 652} 653EXPORT_SYMBOL(drm_framebuffer_remove); 654 655DEFINE_WW_CLASS(crtc_ww_class); 656 657/** 658 * drm_crtc_init_with_planes - Initialise a new CRTC object with 659 * specified primary and cursor planes. 660 * @dev: DRM device 661 * @crtc: CRTC object to init 662 * @primary: Primary plane for CRTC 663 * @cursor: Cursor plane for CRTC 664 * @funcs: callbacks for the new CRTC 665 * 666 * Inits a new object created as base part of a driver crtc object. 667 * 668 * Returns: 669 * Zero on success, error code on failure. 670 */ 671int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 672 struct drm_plane *primary, 673 struct drm_plane *cursor, 674 const struct drm_crtc_funcs *funcs) 675{ 676 struct drm_mode_config *config = &dev->mode_config; 677 int ret; 678 679 crtc->dev = dev; 680 crtc->funcs = funcs; 681 crtc->invert_dimensions = false; 682 683 drm_modeset_lock_init(&crtc->mutex); 684 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 685 if (ret) 686 goto out; 687 688 crtc->base.properties = &crtc->properties; 689 690 list_add_tail(&crtc->head, &config->crtc_list); 691 config->num_crtc++; 692 693 crtc->primary = primary; 694 crtc->cursor = cursor; 695 if (primary) 696 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 697 if (cursor) 698 cursor->possible_crtcs = 1 << drm_crtc_index(crtc); 699 700 out: 701 702 return ret; 703} 704EXPORT_SYMBOL(drm_crtc_init_with_planes); 705 706/** 707 * drm_crtc_cleanup - Clean up the core crtc usage 708 * @crtc: CRTC to cleanup 709 * 710 * This function cleans up @crtc and removes it from the DRM mode setting 711 * core. Note that the function does *not* free the crtc structure itself, 712 * this is the responsibility of the caller. 713 */ 714void drm_crtc_cleanup(struct drm_crtc *crtc) 715{ 716 struct drm_device *dev = crtc->dev; 717 718 kfree(crtc->gamma_store); 719 crtc->gamma_store = NULL; 720 721 drm_modeset_lock_fini(&crtc->mutex); 722 723 drm_mode_object_put(dev, &crtc->base); 724 list_del(&crtc->head); 725 dev->mode_config.num_crtc--; 726} 727EXPORT_SYMBOL(drm_crtc_cleanup); 728 729/** 730 * drm_crtc_index - find the index of a registered CRTC 731 * @crtc: CRTC to find index for 732 * 733 * Given a registered CRTC, return the index of that CRTC within a DRM 734 * device's list of CRTCs. 735 */ 736unsigned int drm_crtc_index(struct drm_crtc *crtc) 737{ 738 unsigned int index = 0; 739 struct drm_crtc *tmp; 740 741 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { 742 if (tmp == crtc) 743 return index; 744 745 index++; 746 } 747 748 BUG(); 749} 750EXPORT_SYMBOL(drm_crtc_index); 751 752/* 753 * drm_mode_remove - remove and free a mode 754 * @connector: connector list to modify 755 * @mode: mode to remove 756 * 757 * Remove @mode from @connector's mode list, then free it. 758 */ 759static void drm_mode_remove(struct drm_connector *connector, 760 struct drm_display_mode *mode) 761{ 762 list_del(&mode->head); 763 drm_mode_destroy(connector->dev, mode); 764} 765 766/** 767 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 768 * @connector: connector to quwery 769 * @mode: returned mode 770 * 771 * The kernel supports per-connector configration of its consoles through 772 * use of the video= parameter. This function parses that option and 773 * extracts the user's specified mode (or enable/disable status) for a 774 * particular connector. This is typically only used during the early fbdev 775 * setup. 776 */ 777static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 778{ 779 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 780 char *option = NULL; 781 782 if (fb_get_options(connector->name, &option)) 783 return; 784 785 if (!drm_mode_parse_command_line_for_connector(option, 786 connector, 787 mode)) 788 return; 789 790 if (mode->force) { 791 const char *s; 792 793 switch (mode->force) { 794 case DRM_FORCE_OFF: 795 s = "OFF"; 796 break; 797 case DRM_FORCE_ON_DIGITAL: 798 s = "ON - dig"; 799 break; 800 default: 801 case DRM_FORCE_ON: 802 s = "ON"; 803 break; 804 } 805 806 DRM_INFO("forcing %s connector %s\n", connector->name, s); 807 connector->force = mode->force; 808 } 809 810 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 811 connector->name, 812 mode->xres, mode->yres, 813 mode->refresh_specified ? mode->refresh : 60, 814 mode->rb ? " reduced blanking" : "", 815 mode->margins ? " with margins" : "", 816 mode->interlace ? " interlaced" : ""); 817} 818 819/** 820 * drm_connector_init - Init a preallocated connector 821 * @dev: DRM device 822 * @connector: the connector to init 823 * @funcs: callbacks for this connector 824 * @connector_type: user visible type of the connector 825 * 826 * Initialises a preallocated connector. Connectors should be 827 * subclassed as part of driver connector objects. 828 * 829 * Returns: 830 * Zero on success, error code on failure. 831 */ 832int drm_connector_init(struct drm_device *dev, 833 struct drm_connector *connector, 834 const struct drm_connector_funcs *funcs, 835 int connector_type) 836{ 837 int ret; 838 struct ida *connector_ida = 839 &drm_connector_enum_list[connector_type].ida; 840 841 drm_modeset_lock_all(dev); 842 843 ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false); 844 if (ret) 845 goto out_unlock; 846 847 connector->base.properties = &connector->properties; 848 connector->dev = dev; 849 connector->funcs = funcs; 850 connector->connector_type = connector_type; 851 connector->connector_type_id = 852 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); 853 if (connector->connector_type_id < 0) { 854 ret = connector->connector_type_id; 855 goto out_put; 856 } 857 connector->name = 858 kasprintf(GFP_KERNEL, "%s-%d", 859 drm_connector_enum_list[connector_type].name, 860 connector->connector_type_id); 861 if (!connector->name) { 862 ret = -ENOMEM; 863 goto out_put; 864 } 865 866 INIT_LIST_HEAD(&connector->probed_modes); 867 INIT_LIST_HEAD(&connector->modes); 868 connector->edid_blob_ptr = NULL; 869 connector->status = connector_status_unknown; 870 871 drm_connector_get_cmdline_mode(connector); 872 873 list_add_tail(&connector->head, &dev->mode_config.connector_list); 874 dev->mode_config.num_connector++; 875 876 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 877 drm_object_attach_property(&connector->base, 878 dev->mode_config.edid_property, 879 0); 880 881 drm_object_attach_property(&connector->base, 882 dev->mode_config.dpms_property, 0); 883 884 connector->debugfs_entry = NULL; 885 886out_put: 887 if (ret) 888 drm_mode_object_put(dev, &connector->base); 889 890out_unlock: 891 drm_modeset_unlock_all(dev); 892 893 return ret; 894} 895EXPORT_SYMBOL(drm_connector_init); 896 897/** 898 * drm_connector_cleanup - cleans up an initialised connector 899 * @connector: connector to cleanup 900 * 901 * Cleans up the connector but doesn't free the object. 902 */ 903void drm_connector_cleanup(struct drm_connector *connector) 904{ 905 struct drm_device *dev = connector->dev; 906 struct drm_display_mode *mode, *t; 907 908 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 909 drm_mode_remove(connector, mode); 910 911 list_for_each_entry_safe(mode, t, &connector->modes, head) 912 drm_mode_remove(connector, mode); 913 914 ida_remove(&drm_connector_enum_list[connector->connector_type].ida, 915 connector->connector_type_id); 916 917 drm_mode_object_put(dev, &connector->base); 918 kfree(connector->name); 919 connector->name = NULL; 920 list_del(&connector->head); 921 dev->mode_config.num_connector--; 922} 923EXPORT_SYMBOL(drm_connector_cleanup); 924 925/** 926 * drm_connector_index - find the index of a registered connector 927 * @connector: connector to find index for 928 * 929 * Given a registered connector, return the index of that connector within a DRM 930 * device's list of connectors. 931 */ 932unsigned int drm_connector_index(struct drm_connector *connector) 933{ 934 unsigned int index = 0; 935 struct drm_connector *tmp; 936 937 list_for_each_entry(tmp, &connector->dev->mode_config.connector_list, head) { 938 if (tmp == connector) 939 return index; 940 941 index++; 942 } 943 944 BUG(); 945} 946EXPORT_SYMBOL(drm_connector_index); 947 948/** 949 * drm_connector_register - register a connector 950 * @connector: the connector to register 951 * 952 * Register userspace interfaces for a connector 953 * 954 * Returns: 955 * Zero on success, error code on failure. 956 */ 957int drm_connector_register(struct drm_connector *connector) 958{ 959 int ret; 960 961 drm_mode_object_register(connector->dev, &connector->base); 962 963 ret = drm_sysfs_connector_add(connector); 964 if (ret) 965 return ret; 966 967 ret = drm_debugfs_connector_add(connector); 968 if (ret) { 969 drm_sysfs_connector_remove(connector); 970 return ret; 971 } 972 973 return 0; 974} 975EXPORT_SYMBOL(drm_connector_register); 976 977/** 978 * drm_connector_unregister - unregister a connector 979 * @connector: the connector to unregister 980 * 981 * Unregister userspace interfaces for a connector 982 */ 983void drm_connector_unregister(struct drm_connector *connector) 984{ 985 drm_sysfs_connector_remove(connector); 986 drm_debugfs_connector_remove(connector); 987} 988EXPORT_SYMBOL(drm_connector_unregister); 989 990 991/** 992 * drm_connector_unplug_all - unregister connector userspace interfaces 993 * @dev: drm device 994 * 995 * This function unregisters all connector userspace interfaces in sysfs. Should 996 * be call when the device is disconnected, e.g. from an usb driver's 997 * ->disconnect callback. 998 */ 999void drm_connector_unplug_all(struct drm_device *dev) 1000{ 1001 struct drm_connector *connector; 1002 1003 /* taking the mode config mutex ends up in a clash with sysfs */ 1004 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1005 drm_connector_unregister(connector); 1006 1007} 1008EXPORT_SYMBOL(drm_connector_unplug_all); 1009 1010/** 1011 * drm_bridge_init - initialize a drm transcoder/bridge 1012 * @dev: drm device 1013 * @bridge: transcoder/bridge to set up 1014 * @funcs: bridge function table 1015 * 1016 * Initialises a preallocated bridge. Bridges should be 1017 * subclassed as part of driver connector objects. 1018 * 1019 * Returns: 1020 * Zero on success, error code on failure. 1021 */ 1022int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge, 1023 const struct drm_bridge_funcs *funcs) 1024{ 1025 int ret; 1026 1027 drm_modeset_lock_all(dev); 1028 1029 ret = drm_mode_object_get(dev, &bridge->base, DRM_MODE_OBJECT_BRIDGE); 1030 if (ret) 1031 goto out; 1032 1033 bridge->dev = dev; 1034 bridge->funcs = funcs; 1035 1036 list_add_tail(&bridge->head, &dev->mode_config.bridge_list); 1037 dev->mode_config.num_bridge++; 1038 1039 out: 1040 drm_modeset_unlock_all(dev); 1041 return ret; 1042} 1043EXPORT_SYMBOL(drm_bridge_init); 1044 1045/** 1046 * drm_bridge_cleanup - cleans up an initialised bridge 1047 * @bridge: bridge to cleanup 1048 * 1049 * Cleans up the bridge but doesn't free the object. 1050 */ 1051void drm_bridge_cleanup(struct drm_bridge *bridge) 1052{ 1053 struct drm_device *dev = bridge->dev; 1054 1055 drm_modeset_lock_all(dev); 1056 drm_mode_object_put(dev, &bridge->base); 1057 list_del(&bridge->head); 1058 dev->mode_config.num_bridge--; 1059 drm_modeset_unlock_all(dev); 1060} 1061EXPORT_SYMBOL(drm_bridge_cleanup); 1062 1063/** 1064 * drm_encoder_init - Init a preallocated encoder 1065 * @dev: drm device 1066 * @encoder: the encoder to init 1067 * @funcs: callbacks for this encoder 1068 * @encoder_type: user visible type of the encoder 1069 * 1070 * Initialises a preallocated encoder. Encoder should be 1071 * subclassed as part of driver encoder objects. 1072 * 1073 * Returns: 1074 * Zero on success, error code on failure. 1075 */ 1076int drm_encoder_init(struct drm_device *dev, 1077 struct drm_encoder *encoder, 1078 const struct drm_encoder_funcs *funcs, 1079 int encoder_type) 1080{ 1081 int ret; 1082 1083 drm_modeset_lock_all(dev); 1084 1085 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1086 if (ret) 1087 goto out_unlock; 1088 1089 encoder->dev = dev; 1090 encoder->encoder_type = encoder_type; 1091 encoder->funcs = funcs; 1092 encoder->name = kasprintf(GFP_KERNEL, "%s-%d", 1093 drm_encoder_enum_list[encoder_type].name, 1094 encoder->base.id); 1095 if (!encoder->name) { 1096 ret = -ENOMEM; 1097 goto out_put; 1098 } 1099 1100 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1101 dev->mode_config.num_encoder++; 1102 1103out_put: 1104 if (ret) 1105 drm_mode_object_put(dev, &encoder->base); 1106 1107out_unlock: 1108 drm_modeset_unlock_all(dev); 1109 1110 return ret; 1111} 1112EXPORT_SYMBOL(drm_encoder_init); 1113 1114/** 1115 * drm_encoder_cleanup - cleans up an initialised encoder 1116 * @encoder: encoder to cleanup 1117 * 1118 * Cleans up the encoder but doesn't free the object. 1119 */ 1120void drm_encoder_cleanup(struct drm_encoder *encoder) 1121{ 1122 struct drm_device *dev = encoder->dev; 1123 drm_modeset_lock_all(dev); 1124 drm_mode_object_put(dev, &encoder->base); 1125 kfree(encoder->name); 1126 encoder->name = NULL; 1127 list_del(&encoder->head); 1128 dev->mode_config.num_encoder--; 1129 drm_modeset_unlock_all(dev); 1130} 1131EXPORT_SYMBOL(drm_encoder_cleanup); 1132 1133/** 1134 * drm_universal_plane_init - Initialize a new universal plane object 1135 * @dev: DRM device 1136 * @plane: plane object to init 1137 * @possible_crtcs: bitmask of possible CRTCs 1138 * @funcs: callbacks for the new plane 1139 * @formats: array of supported formats (%DRM_FORMAT_*) 1140 * @format_count: number of elements in @formats 1141 * @type: type of plane (overlay, primary, cursor) 1142 * 1143 * Initializes a plane object of type @type. 1144 * 1145 * Returns: 1146 * Zero on success, error code on failure. 1147 */ 1148int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1149 unsigned long possible_crtcs, 1150 const struct drm_plane_funcs *funcs, 1151 const uint32_t *formats, uint32_t format_count, 1152 enum drm_plane_type type) 1153{ 1154 int ret; 1155 1156 drm_modeset_lock_all(dev); 1157 1158 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1159 if (ret) 1160 goto out; 1161 1162 plane->base.properties = &plane->properties; 1163 plane->dev = dev; 1164 plane->funcs = funcs; 1165 plane->format_types = kmalloc(sizeof(uint32_t) * format_count, 1166 GFP_KERNEL); 1167 if (!plane->format_types) { 1168 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1169 drm_mode_object_put(dev, &plane->base); 1170 ret = -ENOMEM; 1171 goto out; 1172 } 1173 1174 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1175 plane->format_count = format_count; 1176 plane->possible_crtcs = possible_crtcs; 1177 plane->type = type; 1178 1179 list_add_tail(&plane->head, &dev->mode_config.plane_list); 1180 dev->mode_config.num_total_plane++; 1181 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1182 dev->mode_config.num_overlay_plane++; 1183 1184 drm_object_attach_property(&plane->base, 1185 dev->mode_config.plane_type_property, 1186 plane->type); 1187 1188 out: 1189 drm_modeset_unlock_all(dev); 1190 1191 return ret; 1192} 1193EXPORT_SYMBOL(drm_universal_plane_init); 1194 1195/** 1196 * drm_plane_init - Initialize a legacy plane 1197 * @dev: DRM device 1198 * @plane: plane object to init 1199 * @possible_crtcs: bitmask of possible CRTCs 1200 * @funcs: callbacks for the new plane 1201 * @formats: array of supported formats (%DRM_FORMAT_*) 1202 * @format_count: number of elements in @formats 1203 * @is_primary: plane type (primary vs overlay) 1204 * 1205 * Legacy API to initialize a DRM plane. 1206 * 1207 * New drivers should call drm_universal_plane_init() instead. 1208 * 1209 * Returns: 1210 * Zero on success, error code on failure. 1211 */ 1212int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1213 unsigned long possible_crtcs, 1214 const struct drm_plane_funcs *funcs, 1215 const uint32_t *formats, uint32_t format_count, 1216 bool is_primary) 1217{ 1218 enum drm_plane_type type; 1219 1220 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1221 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1222 formats, format_count, type); 1223} 1224EXPORT_SYMBOL(drm_plane_init); 1225 1226/** 1227 * drm_plane_cleanup - Clean up the core plane usage 1228 * @plane: plane to cleanup 1229 * 1230 * This function cleans up @plane and removes it from the DRM mode setting 1231 * core. Note that the function does *not* free the plane structure itself, 1232 * this is the responsibility of the caller. 1233 */ 1234void drm_plane_cleanup(struct drm_plane *plane) 1235{ 1236 struct drm_device *dev = plane->dev; 1237 1238 drm_modeset_lock_all(dev); 1239 kfree(plane->format_types); 1240 drm_mode_object_put(dev, &plane->base); 1241 1242 BUG_ON(list_empty(&plane->head)); 1243 1244 list_del(&plane->head); 1245 dev->mode_config.num_total_plane--; 1246 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1247 dev->mode_config.num_overlay_plane--; 1248 drm_modeset_unlock_all(dev); 1249} 1250EXPORT_SYMBOL(drm_plane_cleanup); 1251 1252/** 1253 * drm_plane_index - find the index of a registered plane 1254 * @plane: plane to find index for 1255 * 1256 * Given a registered plane, return the index of that CRTC within a DRM 1257 * device's list of planes. 1258 */ 1259unsigned int drm_plane_index(struct drm_plane *plane) 1260{ 1261 unsigned int index = 0; 1262 struct drm_plane *tmp; 1263 1264 list_for_each_entry(tmp, &plane->dev->mode_config.plane_list, head) { 1265 if (tmp == plane) 1266 return index; 1267 1268 index++; 1269 } 1270 1271 BUG(); 1272} 1273EXPORT_SYMBOL(drm_plane_index); 1274 1275/** 1276 * drm_plane_force_disable - Forcibly disable a plane 1277 * @plane: plane to disable 1278 * 1279 * Forces the plane to be disabled. 1280 * 1281 * Used when the plane's current framebuffer is destroyed, 1282 * and when restoring fbdev mode. 1283 */ 1284void drm_plane_force_disable(struct drm_plane *plane) 1285{ 1286 int ret; 1287 1288 if (!plane->fb) 1289 return; 1290 1291 plane->old_fb = plane->fb; 1292 ret = plane->funcs->disable_plane(plane); 1293 if (ret) { 1294 DRM_ERROR("failed to disable plane with busy fb\n"); 1295 plane->old_fb = NULL; 1296 return; 1297 } 1298 /* disconnect the plane from the fb and crtc: */ 1299 __drm_framebuffer_unreference(plane->old_fb); 1300 plane->old_fb = NULL; 1301 plane->fb = NULL; 1302 plane->crtc = NULL; 1303} 1304EXPORT_SYMBOL(drm_plane_force_disable); 1305 1306static int drm_mode_create_standard_connector_properties(struct drm_device *dev) 1307{ 1308 struct drm_property *edid; 1309 struct drm_property *dpms; 1310 struct drm_property *dev_path; 1311 1312 /* 1313 * Standard properties (apply to all connectors) 1314 */ 1315 edid = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1316 DRM_MODE_PROP_IMMUTABLE, 1317 "EDID", 0); 1318 dev->mode_config.edid_property = edid; 1319 1320 dpms = drm_property_create_enum(dev, 0, 1321 "DPMS", drm_dpms_enum_list, 1322 ARRAY_SIZE(drm_dpms_enum_list)); 1323 dev->mode_config.dpms_property = dpms; 1324 1325 dev_path = drm_property_create(dev, 1326 DRM_MODE_PROP_BLOB | 1327 DRM_MODE_PROP_IMMUTABLE, 1328 "PATH", 0); 1329 dev->mode_config.path_property = dev_path; 1330 1331 return 0; 1332} 1333 1334static int drm_mode_create_standard_plane_properties(struct drm_device *dev) 1335{ 1336 struct drm_property *type; 1337 1338 /* 1339 * Standard properties (apply to all planes) 1340 */ 1341 type = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1342 "type", drm_plane_type_enum_list, 1343 ARRAY_SIZE(drm_plane_type_enum_list)); 1344 dev->mode_config.plane_type_property = type; 1345 1346 return 0; 1347} 1348 1349/** 1350 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1351 * @dev: DRM device 1352 * 1353 * Called by a driver the first time a DVI-I connector is made. 1354 */ 1355int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1356{ 1357 struct drm_property *dvi_i_selector; 1358 struct drm_property *dvi_i_subconnector; 1359 1360 if (dev->mode_config.dvi_i_select_subconnector_property) 1361 return 0; 1362 1363 dvi_i_selector = 1364 drm_property_create_enum(dev, 0, 1365 "select subconnector", 1366 drm_dvi_i_select_enum_list, 1367 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1368 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1369 1370 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1371 "subconnector", 1372 drm_dvi_i_subconnector_enum_list, 1373 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1374 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1375 1376 return 0; 1377} 1378EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1379 1380/** 1381 * drm_create_tv_properties - create TV specific connector properties 1382 * @dev: DRM device 1383 * @num_modes: number of different TV formats (modes) supported 1384 * @modes: array of pointers to strings containing name of each format 1385 * 1386 * Called by a driver's TV initialization routine, this function creates 1387 * the TV specific connector properties for a given device. Caller is 1388 * responsible for allocating a list of format names and passing them to 1389 * this routine. 1390 */ 1391int drm_mode_create_tv_properties(struct drm_device *dev, int num_modes, 1392 char *modes[]) 1393{ 1394 struct drm_property *tv_selector; 1395 struct drm_property *tv_subconnector; 1396 int i; 1397 1398 if (dev->mode_config.tv_select_subconnector_property) 1399 return 0; 1400 1401 /* 1402 * Basic connector properties 1403 */ 1404 tv_selector = drm_property_create_enum(dev, 0, 1405 "select subconnector", 1406 drm_tv_select_enum_list, 1407 ARRAY_SIZE(drm_tv_select_enum_list)); 1408 dev->mode_config.tv_select_subconnector_property = tv_selector; 1409 1410 tv_subconnector = 1411 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1412 "subconnector", 1413 drm_tv_subconnector_enum_list, 1414 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1415 dev->mode_config.tv_subconnector_property = tv_subconnector; 1416 1417 /* 1418 * Other, TV specific properties: margins & TV modes. 1419 */ 1420 dev->mode_config.tv_left_margin_property = 1421 drm_property_create_range(dev, 0, "left margin", 0, 100); 1422 1423 dev->mode_config.tv_right_margin_property = 1424 drm_property_create_range(dev, 0, "right margin", 0, 100); 1425 1426 dev->mode_config.tv_top_margin_property = 1427 drm_property_create_range(dev, 0, "top margin", 0, 100); 1428 1429 dev->mode_config.tv_bottom_margin_property = 1430 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1431 1432 dev->mode_config.tv_mode_property = 1433 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1434 "mode", num_modes); 1435 for (i = 0; i < num_modes; i++) 1436 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1437 i, modes[i]); 1438 1439 dev->mode_config.tv_brightness_property = 1440 drm_property_create_range(dev, 0, "brightness", 0, 100); 1441 1442 dev->mode_config.tv_contrast_property = 1443 drm_property_create_range(dev, 0, "contrast", 0, 100); 1444 1445 dev->mode_config.tv_flicker_reduction_property = 1446 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1447 1448 dev->mode_config.tv_overscan_property = 1449 drm_property_create_range(dev, 0, "overscan", 0, 100); 1450 1451 dev->mode_config.tv_saturation_property = 1452 drm_property_create_range(dev, 0, "saturation", 0, 100); 1453 1454 dev->mode_config.tv_hue_property = 1455 drm_property_create_range(dev, 0, "hue", 0, 100); 1456 1457 return 0; 1458} 1459EXPORT_SYMBOL(drm_mode_create_tv_properties); 1460 1461/** 1462 * drm_mode_create_scaling_mode_property - create scaling mode property 1463 * @dev: DRM device 1464 * 1465 * Called by a driver the first time it's needed, must be attached to desired 1466 * connectors. 1467 */ 1468int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1469{ 1470 struct drm_property *scaling_mode; 1471 1472 if (dev->mode_config.scaling_mode_property) 1473 return 0; 1474 1475 scaling_mode = 1476 drm_property_create_enum(dev, 0, "scaling mode", 1477 drm_scaling_mode_enum_list, 1478 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1479 1480 dev->mode_config.scaling_mode_property = scaling_mode; 1481 1482 return 0; 1483} 1484EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1485 1486/** 1487 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1488 * @dev: DRM device 1489 * 1490 * Called by a driver the first time it's needed, must be attached to desired 1491 * connectors. 1492 * 1493 * Returns: 1494 * Zero on success, errno on failure. 1495 */ 1496int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1497{ 1498 if (dev->mode_config.aspect_ratio_property) 1499 return 0; 1500 1501 dev->mode_config.aspect_ratio_property = 1502 drm_property_create_enum(dev, 0, "aspect ratio", 1503 drm_aspect_ratio_enum_list, 1504 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1505 1506 if (dev->mode_config.aspect_ratio_property == NULL) 1507 return -ENOMEM; 1508 1509 return 0; 1510} 1511EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1512 1513/** 1514 * drm_mode_create_dirty_property - create dirty property 1515 * @dev: DRM device 1516 * 1517 * Called by a driver the first time it's needed, must be attached to desired 1518 * connectors. 1519 */ 1520int drm_mode_create_dirty_info_property(struct drm_device *dev) 1521{ 1522 struct drm_property *dirty_info; 1523 1524 if (dev->mode_config.dirty_info_property) 1525 return 0; 1526 1527 dirty_info = 1528 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1529 "dirty", 1530 drm_dirty_info_enum_list, 1531 ARRAY_SIZE(drm_dirty_info_enum_list)); 1532 dev->mode_config.dirty_info_property = dirty_info; 1533 1534 return 0; 1535} 1536EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1537 1538static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group) 1539{ 1540 uint32_t total_objects = 0; 1541 1542 total_objects += dev->mode_config.num_crtc; 1543 total_objects += dev->mode_config.num_connector; 1544 total_objects += dev->mode_config.num_encoder; 1545 total_objects += dev->mode_config.num_bridge; 1546 1547 group->id_list = kzalloc(total_objects * sizeof(uint32_t), GFP_KERNEL); 1548 if (!group->id_list) 1549 return -ENOMEM; 1550 1551 group->num_crtcs = 0; 1552 group->num_connectors = 0; 1553 group->num_encoders = 0; 1554 group->num_bridges = 0; 1555 return 0; 1556} 1557 1558void drm_mode_group_destroy(struct drm_mode_group *group) 1559{ 1560 kfree(group->id_list); 1561 group->id_list = NULL; 1562} 1563 1564/* 1565 * NOTE: Driver's shouldn't ever call drm_mode_group_init_legacy_group - it is 1566 * the drm core's responsibility to set up mode control groups. 1567 */ 1568int drm_mode_group_init_legacy_group(struct drm_device *dev, 1569 struct drm_mode_group *group) 1570{ 1571 struct drm_crtc *crtc; 1572 struct drm_encoder *encoder; 1573 struct drm_connector *connector; 1574 struct drm_bridge *bridge; 1575 int ret; 1576 1577 if ((ret = drm_mode_group_init(dev, group))) 1578 return ret; 1579 1580 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 1581 group->id_list[group->num_crtcs++] = crtc->base.id; 1582 1583 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 1584 group->id_list[group->num_crtcs + group->num_encoders++] = 1585 encoder->base.id; 1586 1587 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1588 group->id_list[group->num_crtcs + group->num_encoders + 1589 group->num_connectors++] = connector->base.id; 1590 1591 list_for_each_entry(bridge, &dev->mode_config.bridge_list, head) 1592 group->id_list[group->num_crtcs + group->num_encoders + 1593 group->num_connectors + group->num_bridges++] = 1594 bridge->base.id; 1595 1596 return 0; 1597} 1598EXPORT_SYMBOL(drm_mode_group_init_legacy_group); 1599 1600void drm_reinit_primary_mode_group(struct drm_device *dev) 1601{ 1602 drm_modeset_lock_all(dev); 1603 drm_mode_group_destroy(&dev->primary->mode_group); 1604 drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group); 1605 drm_modeset_unlock_all(dev); 1606} 1607EXPORT_SYMBOL(drm_reinit_primary_mode_group); 1608 1609/** 1610 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1611 * @out: drm_mode_modeinfo struct to return to the user 1612 * @in: drm_display_mode to use 1613 * 1614 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1615 * the user. 1616 */ 1617static void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out, 1618 const struct drm_display_mode *in) 1619{ 1620 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || 1621 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || 1622 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || 1623 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || 1624 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, 1625 "timing values too large for mode info\n"); 1626 1627 out->clock = in->clock; 1628 out->hdisplay = in->hdisplay; 1629 out->hsync_start = in->hsync_start; 1630 out->hsync_end = in->hsync_end; 1631 out->htotal = in->htotal; 1632 out->hskew = in->hskew; 1633 out->vdisplay = in->vdisplay; 1634 out->vsync_start = in->vsync_start; 1635 out->vsync_end = in->vsync_end; 1636 out->vtotal = in->vtotal; 1637 out->vscan = in->vscan; 1638 out->vrefresh = in->vrefresh; 1639 out->flags = in->flags; 1640 out->type = in->type; 1641 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1642 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1643} 1644 1645/** 1646 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 1647 * @out: drm_display_mode to return to the user 1648 * @in: drm_mode_modeinfo to use 1649 * 1650 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 1651 * the caller. 1652 * 1653 * Returns: 1654 * Zero on success, errno on failure. 1655 */ 1656static int drm_crtc_convert_umode(struct drm_display_mode *out, 1657 const struct drm_mode_modeinfo *in) 1658{ 1659 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) 1660 return -ERANGE; 1661 1662 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1663 return -EINVAL; 1664 1665 out->clock = in->clock; 1666 out->hdisplay = in->hdisplay; 1667 out->hsync_start = in->hsync_start; 1668 out->hsync_end = in->hsync_end; 1669 out->htotal = in->htotal; 1670 out->hskew = in->hskew; 1671 out->vdisplay = in->vdisplay; 1672 out->vsync_start = in->vsync_start; 1673 out->vsync_end = in->vsync_end; 1674 out->vtotal = in->vtotal; 1675 out->vscan = in->vscan; 1676 out->vrefresh = in->vrefresh; 1677 out->flags = in->flags; 1678 out->type = in->type; 1679 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1680 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1681 1682 return 0; 1683} 1684 1685/** 1686 * drm_mode_getresources - get graphics configuration 1687 * @dev: drm device for the ioctl 1688 * @data: data pointer for the ioctl 1689 * @file_priv: drm file for the ioctl call 1690 * 1691 * Construct a set of configuration description structures and return 1692 * them to the user, including CRTC, connector and framebuffer configuration. 1693 * 1694 * Called by the user via ioctl. 1695 * 1696 * Returns: 1697 * Zero on success, errno on failure. 1698 */ 1699int drm_mode_getresources(struct drm_device *dev, void *data, 1700 struct drm_file *file_priv) 1701{ 1702 struct drm_mode_card_res *card_res = data; 1703 struct list_head *lh; 1704 struct drm_framebuffer *fb; 1705 struct drm_connector *connector; 1706 struct drm_crtc *crtc; 1707 struct drm_encoder *encoder; 1708 int ret = 0; 1709 int connector_count = 0; 1710 int crtc_count = 0; 1711 int fb_count = 0; 1712 int encoder_count = 0; 1713 int copied = 0, i; 1714 uint32_t __user *fb_id; 1715 uint32_t __user *crtc_id; 1716 uint32_t __user *connector_id; 1717 uint32_t __user *encoder_id; 1718 struct drm_mode_group *mode_group; 1719 1720 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1721 return -EINVAL; 1722 1723 1724 mutex_lock(&file_priv->fbs_lock); 1725 /* 1726 * For the non-control nodes we need to limit the list of resources 1727 * by IDs in the group list for this node 1728 */ 1729 list_for_each(lh, &file_priv->fbs) 1730 fb_count++; 1731 1732 /* handle this in 4 parts */ 1733 /* FBs */ 1734 if (card_res->count_fbs >= fb_count) { 1735 copied = 0; 1736 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1737 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1738 if (put_user(fb->base.id, fb_id + copied)) { 1739 mutex_unlock(&file_priv->fbs_lock); 1740 return -EFAULT; 1741 } 1742 copied++; 1743 } 1744 } 1745 card_res->count_fbs = fb_count; 1746 mutex_unlock(&file_priv->fbs_lock); 1747 1748 drm_modeset_lock_all(dev); 1749 if (!drm_is_primary_client(file_priv)) { 1750 1751 mode_group = NULL; 1752 list_for_each(lh, &dev->mode_config.crtc_list) 1753 crtc_count++; 1754 1755 list_for_each(lh, &dev->mode_config.connector_list) 1756 connector_count++; 1757 1758 list_for_each(lh, &dev->mode_config.encoder_list) 1759 encoder_count++; 1760 } else { 1761 1762 mode_group = &file_priv->master->minor->mode_group; 1763 crtc_count = mode_group->num_crtcs; 1764 connector_count = mode_group->num_connectors; 1765 encoder_count = mode_group->num_encoders; 1766 } 1767 1768 card_res->max_height = dev->mode_config.max_height; 1769 card_res->min_height = dev->mode_config.min_height; 1770 card_res->max_width = dev->mode_config.max_width; 1771 card_res->min_width = dev->mode_config.min_width; 1772 1773 /* CRTCs */ 1774 if (card_res->count_crtcs >= crtc_count) { 1775 copied = 0; 1776 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1777 if (!mode_group) { 1778 list_for_each_entry(crtc, &dev->mode_config.crtc_list, 1779 head) { 1780 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 1781 if (put_user(crtc->base.id, crtc_id + copied)) { 1782 ret = -EFAULT; 1783 goto out; 1784 } 1785 copied++; 1786 } 1787 } else { 1788 for (i = 0; i < mode_group->num_crtcs; i++) { 1789 if (put_user(mode_group->id_list[i], 1790 crtc_id + copied)) { 1791 ret = -EFAULT; 1792 goto out; 1793 } 1794 copied++; 1795 } 1796 } 1797 } 1798 card_res->count_crtcs = crtc_count; 1799 1800 /* Encoders */ 1801 if (card_res->count_encoders >= encoder_count) { 1802 copied = 0; 1803 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1804 if (!mode_group) { 1805 list_for_each_entry(encoder, 1806 &dev->mode_config.encoder_list, 1807 head) { 1808 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1809 encoder->name); 1810 if (put_user(encoder->base.id, encoder_id + 1811 copied)) { 1812 ret = -EFAULT; 1813 goto out; 1814 } 1815 copied++; 1816 } 1817 } else { 1818 for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) { 1819 if (put_user(mode_group->id_list[i], 1820 encoder_id + copied)) { 1821 ret = -EFAULT; 1822 goto out; 1823 } 1824 copied++; 1825 } 1826 1827 } 1828 } 1829 card_res->count_encoders = encoder_count; 1830 1831 /* Connectors */ 1832 if (card_res->count_connectors >= connector_count) { 1833 copied = 0; 1834 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1835 if (!mode_group) { 1836 list_for_each_entry(connector, 1837 &dev->mode_config.connector_list, 1838 head) { 1839 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1840 connector->base.id, 1841 connector->name); 1842 if (put_user(connector->base.id, 1843 connector_id + copied)) { 1844 ret = -EFAULT; 1845 goto out; 1846 } 1847 copied++; 1848 } 1849 } else { 1850 int start = mode_group->num_crtcs + 1851 mode_group->num_encoders; 1852 for (i = start; i < start + mode_group->num_connectors; i++) { 1853 if (put_user(mode_group->id_list[i], 1854 connector_id + copied)) { 1855 ret = -EFAULT; 1856 goto out; 1857 } 1858 copied++; 1859 } 1860 } 1861 } 1862 card_res->count_connectors = connector_count; 1863 1864 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1865 card_res->count_connectors, card_res->count_encoders); 1866 1867out: 1868 drm_modeset_unlock_all(dev); 1869 return ret; 1870} 1871 1872/** 1873 * drm_mode_getcrtc - get CRTC configuration 1874 * @dev: drm device for the ioctl 1875 * @data: data pointer for the ioctl 1876 * @file_priv: drm file for the ioctl call 1877 * 1878 * Construct a CRTC configuration structure to return to the user. 1879 * 1880 * Called by the user via ioctl. 1881 * 1882 * Returns: 1883 * Zero on success, errno on failure. 1884 */ 1885int drm_mode_getcrtc(struct drm_device *dev, 1886 void *data, struct drm_file *file_priv) 1887{ 1888 struct drm_mode_crtc *crtc_resp = data; 1889 struct drm_crtc *crtc; 1890 int ret = 0; 1891 1892 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1893 return -EINVAL; 1894 1895 drm_modeset_lock_all(dev); 1896 1897 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 1898 if (!crtc) { 1899 ret = -ENOENT; 1900 goto out; 1901 } 1902 1903 crtc_resp->x = crtc->x; 1904 crtc_resp->y = crtc->y; 1905 crtc_resp->gamma_size = crtc->gamma_size; 1906 if (crtc->primary->fb) 1907 crtc_resp->fb_id = crtc->primary->fb->base.id; 1908 else 1909 crtc_resp->fb_id = 0; 1910 1911 if (crtc->enabled) { 1912 1913 drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->mode); 1914 crtc_resp->mode_valid = 1; 1915 1916 } else { 1917 crtc_resp->mode_valid = 0; 1918 } 1919 1920out: 1921 drm_modeset_unlock_all(dev); 1922 return ret; 1923} 1924 1925static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 1926 const struct drm_file *file_priv) 1927{ 1928 /* 1929 * If user-space hasn't configured the driver to expose the stereo 3D 1930 * modes, don't expose them. 1931 */ 1932 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 1933 return false; 1934 1935 return true; 1936} 1937 1938/** 1939 * drm_mode_getconnector - get connector configuration 1940 * @dev: drm device for the ioctl 1941 * @data: data pointer for the ioctl 1942 * @file_priv: drm file for the ioctl call 1943 * 1944 * Construct a connector configuration structure to return to the user. 1945 * 1946 * Called by the user via ioctl. 1947 * 1948 * Returns: 1949 * Zero on success, errno on failure. 1950 */ 1951int drm_mode_getconnector(struct drm_device *dev, void *data, 1952 struct drm_file *file_priv) 1953{ 1954 struct drm_mode_get_connector *out_resp = data; 1955 struct drm_connector *connector; 1956 struct drm_display_mode *mode; 1957 int mode_count = 0; 1958 int props_count = 0; 1959 int encoders_count = 0; 1960 int ret = 0; 1961 int copied = 0; 1962 int i; 1963 struct drm_mode_modeinfo u_mode; 1964 struct drm_mode_modeinfo __user *mode_ptr; 1965 uint32_t __user *prop_ptr; 1966 uint64_t __user *prop_values; 1967 uint32_t __user *encoder_ptr; 1968 1969 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1970 return -EINVAL; 1971 1972 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 1973 1974 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 1975 1976 mutex_lock(&dev->mode_config.mutex); 1977 1978 connector = drm_connector_find(dev, out_resp->connector_id); 1979 if (!connector) { 1980 ret = -ENOENT; 1981 goto out; 1982 } 1983 1984 props_count = connector->properties.count; 1985 1986 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 1987 if (connector->encoder_ids[i] != 0) { 1988 encoders_count++; 1989 } 1990 } 1991 1992 if (out_resp->count_modes == 0) { 1993 connector->funcs->fill_modes(connector, 1994 dev->mode_config.max_width, 1995 dev->mode_config.max_height); 1996 } 1997 1998 /* delayed so we get modes regardless of pre-fill_modes state */ 1999 list_for_each_entry(mode, &connector->modes, head) 2000 if (drm_mode_expose_to_userspace(mode, file_priv)) 2001 mode_count++; 2002 2003 out_resp->connector_id = connector->base.id; 2004 out_resp->connector_type = connector->connector_type; 2005 out_resp->connector_type_id = connector->connector_type_id; 2006 out_resp->mm_width = connector->display_info.width_mm; 2007 out_resp->mm_height = connector->display_info.height_mm; 2008 out_resp->subpixel = connector->display_info.subpixel_order; 2009 out_resp->connection = connector->status; 2010 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2011 if (connector->encoder) 2012 out_resp->encoder_id = connector->encoder->base.id; 2013 else 2014 out_resp->encoder_id = 0; 2015 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2016 2017 /* 2018 * This ioctl is called twice, once to determine how much space is 2019 * needed, and the 2nd time to fill it. 2020 */ 2021 if ((out_resp->count_modes >= mode_count) && mode_count) { 2022 copied = 0; 2023 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2024 list_for_each_entry(mode, &connector->modes, head) { 2025 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2026 continue; 2027 2028 drm_crtc_convert_to_umode(&u_mode, mode); 2029 if (copy_to_user(mode_ptr + copied, 2030 &u_mode, sizeof(u_mode))) { 2031 ret = -EFAULT; 2032 goto out; 2033 } 2034 copied++; 2035 } 2036 } 2037 out_resp->count_modes = mode_count; 2038 2039 if ((out_resp->count_props >= props_count) && props_count) { 2040 copied = 0; 2041 prop_ptr = (uint32_t __user *)(unsigned long)(out_resp->props_ptr); 2042 prop_values = (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr); 2043 for (i = 0; i < connector->properties.count; i++) { 2044 if (put_user(connector->properties.ids[i], 2045 prop_ptr + copied)) { 2046 ret = -EFAULT; 2047 goto out; 2048 } 2049 2050 if (put_user(connector->properties.values[i], 2051 prop_values + copied)) { 2052 ret = -EFAULT; 2053 goto out; 2054 } 2055 copied++; 2056 } 2057 } 2058 out_resp->count_props = props_count; 2059 2060 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2061 copied = 0; 2062 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2063 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2064 if (connector->encoder_ids[i] != 0) { 2065 if (put_user(connector->encoder_ids[i], 2066 encoder_ptr + copied)) { 2067 ret = -EFAULT; 2068 goto out; 2069 } 2070 copied++; 2071 } 2072 } 2073 } 2074 out_resp->count_encoders = encoders_count; 2075 2076out: 2077 mutex_unlock(&dev->mode_config.mutex); 2078 2079 return ret; 2080} 2081 2082/** 2083 * drm_mode_getencoder - get encoder configuration 2084 * @dev: drm device for the ioctl 2085 * @data: data pointer for the ioctl 2086 * @file_priv: drm file for the ioctl call 2087 * 2088 * Construct a encoder configuration structure to return to the user. 2089 * 2090 * Called by the user via ioctl. 2091 * 2092 * Returns: 2093 * Zero on success, errno on failure. 2094 */ 2095int drm_mode_getencoder(struct drm_device *dev, void *data, 2096 struct drm_file *file_priv) 2097{ 2098 struct drm_mode_get_encoder *enc_resp = data; 2099 struct drm_encoder *encoder; 2100 int ret = 0; 2101 2102 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2103 return -EINVAL; 2104 2105 drm_modeset_lock_all(dev); 2106 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2107 if (!encoder) { 2108 ret = -ENOENT; 2109 goto out; 2110 } 2111 2112 if (encoder->crtc) 2113 enc_resp->crtc_id = encoder->crtc->base.id; 2114 else 2115 enc_resp->crtc_id = 0; 2116 enc_resp->encoder_type = encoder->encoder_type; 2117 enc_resp->encoder_id = encoder->base.id; 2118 enc_resp->possible_crtcs = encoder->possible_crtcs; 2119 enc_resp->possible_clones = encoder->possible_clones; 2120 2121out: 2122 drm_modeset_unlock_all(dev); 2123 return ret; 2124} 2125 2126/** 2127 * drm_mode_getplane_res - enumerate all plane resources 2128 * @dev: DRM device 2129 * @data: ioctl data 2130 * @file_priv: DRM file info 2131 * 2132 * Construct a list of plane ids to return to the user. 2133 * 2134 * Called by the user via ioctl. 2135 * 2136 * Returns: 2137 * Zero on success, errno on failure. 2138 */ 2139int drm_mode_getplane_res(struct drm_device *dev, void *data, 2140 struct drm_file *file_priv) 2141{ 2142 struct drm_mode_get_plane_res *plane_resp = data; 2143 struct drm_mode_config *config; 2144 struct drm_plane *plane; 2145 uint32_t __user *plane_ptr; 2146 int copied = 0, ret = 0; 2147 unsigned num_planes; 2148 2149 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2150 return -EINVAL; 2151 2152 drm_modeset_lock_all(dev); 2153 config = &dev->mode_config; 2154 2155 if (file_priv->universal_planes) 2156 num_planes = config->num_total_plane; 2157 else 2158 num_planes = config->num_overlay_plane; 2159 2160 /* 2161 * This ioctl is called twice, once to determine how much space is 2162 * needed, and the 2nd time to fill it. 2163 */ 2164 if (num_planes && 2165 (plane_resp->count_planes >= num_planes)) { 2166 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2167 2168 list_for_each_entry(plane, &config->plane_list, head) { 2169 /* 2170 * Unless userspace set the 'universal planes' 2171 * capability bit, only advertise overlays. 2172 */ 2173 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2174 !file_priv->universal_planes) 2175 continue; 2176 2177 if (put_user(plane->base.id, plane_ptr + copied)) { 2178 ret = -EFAULT; 2179 goto out; 2180 } 2181 copied++; 2182 } 2183 } 2184 plane_resp->count_planes = num_planes; 2185 2186out: 2187 drm_modeset_unlock_all(dev); 2188 return ret; 2189} 2190 2191/** 2192 * drm_mode_getplane - get plane configuration 2193 * @dev: DRM device 2194 * @data: ioctl data 2195 * @file_priv: DRM file info 2196 * 2197 * Construct a plane configuration structure to return to the user. 2198 * 2199 * Called by the user via ioctl. 2200 * 2201 * Returns: 2202 * Zero on success, errno on failure. 2203 */ 2204int drm_mode_getplane(struct drm_device *dev, void *data, 2205 struct drm_file *file_priv) 2206{ 2207 struct drm_mode_get_plane *plane_resp = data; 2208 struct drm_plane *plane; 2209 uint32_t __user *format_ptr; 2210 int ret = 0; 2211 2212 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2213 return -EINVAL; 2214 2215 drm_modeset_lock_all(dev); 2216 plane = drm_plane_find(dev, plane_resp->plane_id); 2217 if (!plane) { 2218 ret = -ENOENT; 2219 goto out; 2220 } 2221 2222 if (plane->crtc) 2223 plane_resp->crtc_id = plane->crtc->base.id; 2224 else 2225 plane_resp->crtc_id = 0; 2226 2227 if (plane->fb) 2228 plane_resp->fb_id = plane->fb->base.id; 2229 else 2230 plane_resp->fb_id = 0; 2231 2232 plane_resp->plane_id = plane->base.id; 2233 plane_resp->possible_crtcs = plane->possible_crtcs; 2234 plane_resp->gamma_size = 0; 2235 2236 /* 2237 * This ioctl is called twice, once to determine how much space is 2238 * needed, and the 2nd time to fill it. 2239 */ 2240 if (plane->format_count && 2241 (plane_resp->count_format_types >= plane->format_count)) { 2242 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2243 if (copy_to_user(format_ptr, 2244 plane->format_types, 2245 sizeof(uint32_t) * plane->format_count)) { 2246 ret = -EFAULT; 2247 goto out; 2248 } 2249 } 2250 plane_resp->count_format_types = plane->format_count; 2251 2252out: 2253 drm_modeset_unlock_all(dev); 2254 return ret; 2255} 2256 2257/* 2258 * setplane_internal - setplane handler for internal callers 2259 * 2260 * Note that we assume an extra reference has already been taken on fb. If the 2261 * update fails, this reference will be dropped before return; if it succeeds, 2262 * the previous framebuffer (if any) will be unreferenced instead. 2263 * 2264 * src_{x,y,w,h} are provided in 16.16 fixed point format 2265 */ 2266static int __setplane_internal(struct drm_plane *plane, 2267 struct drm_crtc *crtc, 2268 struct drm_framebuffer *fb, 2269 int32_t crtc_x, int32_t crtc_y, 2270 uint32_t crtc_w, uint32_t crtc_h, 2271 /* src_{x,y,w,h} values are 16.16 fixed point */ 2272 uint32_t src_x, uint32_t src_y, 2273 uint32_t src_w, uint32_t src_h) 2274{ 2275 int ret = 0; 2276 unsigned int fb_width, fb_height; 2277 int i; 2278 2279 /* No fb means shut it down */ 2280 if (!fb) { 2281 plane->old_fb = plane->fb; 2282 ret = plane->funcs->disable_plane(plane); 2283 if (!ret) { 2284 plane->crtc = NULL; 2285 plane->fb = NULL; 2286 } else { 2287 plane->old_fb = NULL; 2288 } 2289 goto out; 2290 } 2291 2292 /* Check whether this plane is usable on this CRTC */ 2293 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2294 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2295 ret = -EINVAL; 2296 goto out; 2297 } 2298 2299 /* Check whether this plane supports the fb pixel format. */ 2300 for (i = 0; i < plane->format_count; i++) 2301 if (fb->pixel_format == plane->format_types[i]) 2302 break; 2303 if (i == plane->format_count) { 2304 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2305 drm_get_format_name(fb->pixel_format)); 2306 ret = -EINVAL; 2307 goto out; 2308 } 2309 2310 fb_width = fb->width << 16; 2311 fb_height = fb->height << 16; 2312 2313 /* Make sure source coordinates are inside the fb. */ 2314 if (src_w > fb_width || 2315 src_x > fb_width - src_w || 2316 src_h > fb_height || 2317 src_y > fb_height - src_h) { 2318 DRM_DEBUG_KMS("Invalid source coordinates " 2319 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2320 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2321 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2322 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2323 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2324 ret = -ENOSPC; 2325 goto out; 2326 } 2327 2328 plane->old_fb = plane->fb; 2329 ret = plane->funcs->update_plane(plane, crtc, fb, 2330 crtc_x, crtc_y, crtc_w, crtc_h, 2331 src_x, src_y, src_w, src_h); 2332 if (!ret) { 2333 plane->crtc = crtc; 2334 plane->fb = fb; 2335 fb = NULL; 2336 } else { 2337 plane->old_fb = NULL; 2338 } 2339 2340out: 2341 if (fb) 2342 drm_framebuffer_unreference(fb); 2343 if (plane->old_fb) 2344 drm_framebuffer_unreference(plane->old_fb); 2345 plane->old_fb = NULL; 2346 2347 return ret; 2348} 2349 2350static int setplane_internal(struct drm_plane *plane, 2351 struct drm_crtc *crtc, 2352 struct drm_framebuffer *fb, 2353 int32_t crtc_x, int32_t crtc_y, 2354 uint32_t crtc_w, uint32_t crtc_h, 2355 /* src_{x,y,w,h} values are 16.16 fixed point */ 2356 uint32_t src_x, uint32_t src_y, 2357 uint32_t src_w, uint32_t src_h) 2358{ 2359 int ret; 2360 2361 drm_modeset_lock_all(plane->dev); 2362 ret = __setplane_internal(plane, crtc, fb, 2363 crtc_x, crtc_y, crtc_w, crtc_h, 2364 src_x, src_y, src_w, src_h); 2365 drm_modeset_unlock_all(plane->dev); 2366 2367 return ret; 2368} 2369 2370/** 2371 * drm_mode_setplane - configure a plane's configuration 2372 * @dev: DRM device 2373 * @data: ioctl data* 2374 * @file_priv: DRM file info 2375 * 2376 * Set plane configuration, including placement, fb, scaling, and other factors. 2377 * Or pass a NULL fb to disable (planes may be disabled without providing a 2378 * valid crtc). 2379 * 2380 * Returns: 2381 * Zero on success, errno on failure. 2382 */ 2383int drm_mode_setplane(struct drm_device *dev, void *data, 2384 struct drm_file *file_priv) 2385{ 2386 struct drm_mode_set_plane *plane_req = data; 2387 struct drm_mode_object *obj; 2388 struct drm_plane *plane; 2389 struct drm_crtc *crtc = NULL; 2390 struct drm_framebuffer *fb = NULL; 2391 2392 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2393 return -EINVAL; 2394 2395 /* Give drivers some help against integer overflows */ 2396 if (plane_req->crtc_w > INT_MAX || 2397 plane_req->crtc_x > INT_MAX - (int32_t) plane_req->crtc_w || 2398 plane_req->crtc_h > INT_MAX || 2399 plane_req->crtc_y > INT_MAX - (int32_t) plane_req->crtc_h) { 2400 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2401 plane_req->crtc_w, plane_req->crtc_h, 2402 plane_req->crtc_x, plane_req->crtc_y); 2403 return -ERANGE; 2404 } 2405 2406 /* 2407 * First, find the plane, crtc, and fb objects. If not available, 2408 * we don't bother to call the driver. 2409 */ 2410 obj = drm_mode_object_find(dev, plane_req->plane_id, 2411 DRM_MODE_OBJECT_PLANE); 2412 if (!obj) { 2413 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2414 plane_req->plane_id); 2415 return -ENOENT; 2416 } 2417 plane = obj_to_plane(obj); 2418 2419 if (plane_req->fb_id) { 2420 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2421 if (!fb) { 2422 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2423 plane_req->fb_id); 2424 return -ENOENT; 2425 } 2426 2427 obj = drm_mode_object_find(dev, plane_req->crtc_id, 2428 DRM_MODE_OBJECT_CRTC); 2429 if (!obj) { 2430 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2431 plane_req->crtc_id); 2432 return -ENOENT; 2433 } 2434 crtc = obj_to_crtc(obj); 2435 } 2436 2437 /* 2438 * setplane_internal will take care of deref'ing either the old or new 2439 * framebuffer depending on success. 2440 */ 2441 return setplane_internal(plane, crtc, fb, 2442 plane_req->crtc_x, plane_req->crtc_y, 2443 plane_req->crtc_w, plane_req->crtc_h, 2444 plane_req->src_x, plane_req->src_y, 2445 plane_req->src_w, plane_req->src_h); 2446} 2447 2448/** 2449 * drm_mode_set_config_internal - helper to call ->set_config 2450 * @set: modeset config to set 2451 * 2452 * This is a little helper to wrap internal calls to the ->set_config driver 2453 * interface. The only thing it adds is correct refcounting dance. 2454 * 2455 * Returns: 2456 * Zero on success, errno on failure. 2457 */ 2458int drm_mode_set_config_internal(struct drm_mode_set *set) 2459{ 2460 struct drm_crtc *crtc = set->crtc; 2461 struct drm_framebuffer *fb; 2462 struct drm_crtc *tmp; 2463 int ret; 2464 2465 /* 2466 * NOTE: ->set_config can also disable other crtcs (if we steal all 2467 * connectors from it), hence we need to refcount the fbs across all 2468 * crtcs. Atomic modeset will have saner semantics ... 2469 */ 2470 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) 2471 tmp->primary->old_fb = tmp->primary->fb; 2472 2473 fb = set->fb; 2474 2475 ret = crtc->funcs->set_config(set); 2476 if (ret == 0) { 2477 crtc->primary->crtc = crtc; 2478 crtc->primary->fb = fb; 2479 } 2480 2481 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { 2482 if (tmp->primary->fb) 2483 drm_framebuffer_reference(tmp->primary->fb); 2484 if (tmp->primary->old_fb) 2485 drm_framebuffer_unreference(tmp->primary->old_fb); 2486 tmp->primary->old_fb = NULL; 2487 } 2488 2489 return ret; 2490} 2491EXPORT_SYMBOL(drm_mode_set_config_internal); 2492 2493/** 2494 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2495 * CRTC viewport 2496 * @crtc: CRTC that framebuffer will be displayed on 2497 * @x: x panning 2498 * @y: y panning 2499 * @mode: mode that framebuffer will be displayed under 2500 * @fb: framebuffer to check size of 2501 */ 2502int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2503 int x, int y, 2504 const struct drm_display_mode *mode, 2505 const struct drm_framebuffer *fb) 2506 2507{ 2508 int hdisplay, vdisplay; 2509 2510 hdisplay = mode->hdisplay; 2511 vdisplay = mode->vdisplay; 2512 2513 if (drm_mode_is_stereo(mode)) { 2514 struct drm_display_mode adjusted = *mode; 2515 2516 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE); 2517 hdisplay = adjusted.crtc_hdisplay; 2518 vdisplay = adjusted.crtc_vdisplay; 2519 } 2520 2521 if (crtc->invert_dimensions) 2522 swap(hdisplay, vdisplay); 2523 2524 if (hdisplay > fb->width || 2525 vdisplay > fb->height || 2526 x > fb->width - hdisplay || 2527 y > fb->height - vdisplay) { 2528 DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n", 2529 fb->width, fb->height, hdisplay, vdisplay, x, y, 2530 crtc->invert_dimensions ? " (inverted)" : ""); 2531 return -ENOSPC; 2532 } 2533 2534 return 0; 2535} 2536EXPORT_SYMBOL(drm_crtc_check_viewport); 2537 2538/** 2539 * drm_mode_setcrtc - set CRTC configuration 2540 * @dev: drm device for the ioctl 2541 * @data: data pointer for the ioctl 2542 * @file_priv: drm file for the ioctl call 2543 * 2544 * Build a new CRTC configuration based on user request. 2545 * 2546 * Called by the user via ioctl. 2547 * 2548 * Returns: 2549 * Zero on success, errno on failure. 2550 */ 2551int drm_mode_setcrtc(struct drm_device *dev, void *data, 2552 struct drm_file *file_priv) 2553{ 2554 struct drm_mode_config *config = &dev->mode_config; 2555 struct drm_mode_crtc *crtc_req = data; 2556 struct drm_crtc *crtc; 2557 struct drm_connector **connector_set = NULL, *connector; 2558 struct drm_framebuffer *fb = NULL; 2559 struct drm_display_mode *mode = NULL; 2560 struct drm_mode_set set; 2561 uint32_t __user *set_connectors_ptr; 2562 int ret; 2563 int i; 2564 2565 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2566 return -EINVAL; 2567 2568 /* For some reason crtc x/y offsets are signed internally. */ 2569 if (crtc_req->x > INT_MAX || crtc_req->y > INT_MAX) 2570 return -ERANGE; 2571 2572 drm_modeset_lock_all(dev); 2573 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2574 if (!crtc) { 2575 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2576 ret = -ENOENT; 2577 goto out; 2578 } 2579 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 2580 2581 if (crtc_req->mode_valid) { 2582 /* If we have a mode we need a framebuffer. */ 2583 /* If we pass -1, set the mode with the currently bound fb */ 2584 if (crtc_req->fb_id == -1) { 2585 if (!crtc->primary->fb) { 2586 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2587 ret = -EINVAL; 2588 goto out; 2589 } 2590 fb = crtc->primary->fb; 2591 /* Make refcounting symmetric with the lookup path. */ 2592 drm_framebuffer_reference(fb); 2593 } else { 2594 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2595 if (!fb) { 2596 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2597 crtc_req->fb_id); 2598 ret = -ENOENT; 2599 goto out; 2600 } 2601 } 2602 2603 mode = drm_mode_create(dev); 2604 if (!mode) { 2605 ret = -ENOMEM; 2606 goto out; 2607 } 2608 2609 ret = drm_crtc_convert_umode(mode, &crtc_req->mode); 2610 if (ret) { 2611 DRM_DEBUG_KMS("Invalid mode\n"); 2612 goto out; 2613 } 2614 2615 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 2616 2617 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2618 mode, fb); 2619 if (ret) 2620 goto out; 2621 2622 } 2623 2624 if (crtc_req->count_connectors == 0 && mode) { 2625 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2626 ret = -EINVAL; 2627 goto out; 2628 } 2629 2630 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2631 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2632 crtc_req->count_connectors); 2633 ret = -EINVAL; 2634 goto out; 2635 } 2636 2637 if (crtc_req->count_connectors > 0) { 2638 u32 out_id; 2639 2640 /* Avoid unbounded kernel memory allocation */ 2641 if (crtc_req->count_connectors > config->num_connector) { 2642 ret = -EINVAL; 2643 goto out; 2644 } 2645 2646 connector_set = kmalloc(crtc_req->count_connectors * 2647 sizeof(struct drm_connector *), 2648 GFP_KERNEL); 2649 if (!connector_set) { 2650 ret = -ENOMEM; 2651 goto out; 2652 } 2653 2654 for (i = 0; i < crtc_req->count_connectors; i++) { 2655 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2656 if (get_user(out_id, &set_connectors_ptr[i])) { 2657 ret = -EFAULT; 2658 goto out; 2659 } 2660 2661 connector = drm_connector_find(dev, out_id); 2662 if (!connector) { 2663 DRM_DEBUG_KMS("Connector id %d unknown\n", 2664 out_id); 2665 ret = -ENOENT; 2666 goto out; 2667 } 2668 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2669 connector->base.id, 2670 connector->name); 2671 2672 connector_set[i] = connector; 2673 } 2674 } 2675 2676 set.crtc = crtc; 2677 set.x = crtc_req->x; 2678 set.y = crtc_req->y; 2679 set.mode = mode; 2680 set.connectors = connector_set; 2681 set.num_connectors = crtc_req->count_connectors; 2682 set.fb = fb; 2683 ret = drm_mode_set_config_internal(&set); 2684 2685out: 2686 if (fb) 2687 drm_framebuffer_unreference(fb); 2688 2689 kfree(connector_set); 2690 drm_mode_destroy(dev, mode); 2691 drm_modeset_unlock_all(dev); 2692 return ret; 2693} 2694 2695/** 2696 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2697 * universal plane handler call 2698 * @crtc: crtc to update cursor for 2699 * @req: data pointer for the ioctl 2700 * @file_priv: drm file for the ioctl call 2701 * 2702 * Legacy cursor ioctl's work directly with driver buffer handles. To 2703 * translate legacy ioctl calls into universal plane handler calls, we need to 2704 * wrap the native buffer handle in a drm_framebuffer. 2705 * 2706 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2707 * buffer with a pitch of 4*width; the universal plane interface should be used 2708 * directly in cases where the hardware can support other buffer settings and 2709 * userspace wants to make use of these capabilities. 2710 * 2711 * Returns: 2712 * Zero on success, errno on failure. 2713 */ 2714static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2715 struct drm_mode_cursor2 *req, 2716 struct drm_file *file_priv) 2717{ 2718 struct drm_device *dev = crtc->dev; 2719 struct drm_framebuffer *fb = NULL; 2720 struct drm_mode_fb_cmd2 fbreq = { 2721 .width = req->width, 2722 .height = req->height, 2723 .pixel_format = DRM_FORMAT_ARGB8888, 2724 .pitches = { req->width * 4 }, 2725 .handles = { req->handle }, 2726 }; 2727 int32_t crtc_x, crtc_y; 2728 uint32_t crtc_w = 0, crtc_h = 0; 2729 uint32_t src_w = 0, src_h = 0; 2730 int ret = 0; 2731 2732 BUG_ON(!crtc->cursor); 2733 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2734 2735 /* 2736 * Obtain fb we'll be using (either new or existing) and take an extra 2737 * reference to it if fb != null. setplane will take care of dropping 2738 * the reference if the plane update fails. 2739 */ 2740 if (req->flags & DRM_MODE_CURSOR_BO) { 2741 if (req->handle) { 2742 fb = add_framebuffer_internal(dev, &fbreq, file_priv); 2743 if (IS_ERR(fb)) { 2744 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2745 return PTR_ERR(fb); 2746 } 2747 2748 drm_framebuffer_reference(fb); 2749 } else { 2750 fb = NULL; 2751 } 2752 } else { 2753 fb = crtc->cursor->fb; 2754 if (fb) 2755 drm_framebuffer_reference(fb); 2756 } 2757 2758 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2759 crtc_x = req->x; 2760 crtc_y = req->y; 2761 } else { 2762 crtc_x = crtc->cursor_x; 2763 crtc_y = crtc->cursor_y; 2764 } 2765 2766 if (fb) { 2767 crtc_w = fb->width; 2768 crtc_h = fb->height; 2769 src_w = fb->width << 16; 2770 src_h = fb->height << 16; 2771 } 2772 2773 /* 2774 * setplane_internal will take care of deref'ing either the old or new 2775 * framebuffer depending on success. 2776 */ 2777 ret = __setplane_internal(crtc->cursor, crtc, fb, 2778 crtc_x, crtc_y, crtc_w, crtc_h, 2779 0, 0, src_w, src_h); 2780 2781 /* Update successful; save new cursor position, if necessary */ 2782 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2783 crtc->cursor_x = req->x; 2784 crtc->cursor_y = req->y; 2785 } 2786 2787 return ret; 2788} 2789 2790static int drm_mode_cursor_common(struct drm_device *dev, 2791 struct drm_mode_cursor2 *req, 2792 struct drm_file *file_priv) 2793{ 2794 struct drm_crtc *crtc; 2795 int ret = 0; 2796 2797 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2798 return -EINVAL; 2799 2800 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 2801 return -EINVAL; 2802 2803 crtc = drm_crtc_find(dev, req->crtc_id); 2804 if (!crtc) { 2805 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 2806 return -ENOENT; 2807 } 2808 2809 /* 2810 * If this crtc has a universal cursor plane, call that plane's update 2811 * handler rather than using legacy cursor handlers. 2812 */ 2813 drm_modeset_lock_crtc(crtc); 2814 if (crtc->cursor) { 2815 ret = drm_mode_cursor_universal(crtc, req, file_priv); 2816 goto out; 2817 } 2818 2819 if (req->flags & DRM_MODE_CURSOR_BO) { 2820 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 2821 ret = -ENXIO; 2822 goto out; 2823 } 2824 /* Turns off the cursor if handle is 0 */ 2825 if (crtc->funcs->cursor_set2) 2826 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 2827 req->width, req->height, req->hot_x, req->hot_y); 2828 else 2829 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 2830 req->width, req->height); 2831 } 2832 2833 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2834 if (crtc->funcs->cursor_move) { 2835 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 2836 } else { 2837 ret = -EFAULT; 2838 goto out; 2839 } 2840 } 2841out: 2842 drm_modeset_unlock_crtc(crtc); 2843 2844 return ret; 2845 2846} 2847 2848 2849/** 2850 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 2851 * @dev: drm device for the ioctl 2852 * @data: data pointer for the ioctl 2853 * @file_priv: drm file for the ioctl call 2854 * 2855 * Set the cursor configuration based on user request. 2856 * 2857 * Called by the user via ioctl. 2858 * 2859 * Returns: 2860 * Zero on success, errno on failure. 2861 */ 2862int drm_mode_cursor_ioctl(struct drm_device *dev, 2863 void *data, struct drm_file *file_priv) 2864{ 2865 struct drm_mode_cursor *req = data; 2866 struct drm_mode_cursor2 new_req; 2867 2868 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 2869 new_req.hot_x = new_req.hot_y = 0; 2870 2871 return drm_mode_cursor_common(dev, &new_req, file_priv); 2872} 2873 2874/** 2875 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 2876 * @dev: drm device for the ioctl 2877 * @data: data pointer for the ioctl 2878 * @file_priv: drm file for the ioctl call 2879 * 2880 * Set the cursor configuration based on user request. This implements the 2nd 2881 * version of the cursor ioctl, which allows userspace to additionally specify 2882 * the hotspot of the pointer. 2883 * 2884 * Called by the user via ioctl. 2885 * 2886 * Returns: 2887 * Zero on success, errno on failure. 2888 */ 2889int drm_mode_cursor2_ioctl(struct drm_device *dev, 2890 void *data, struct drm_file *file_priv) 2891{ 2892 struct drm_mode_cursor2 *req = data; 2893 return drm_mode_cursor_common(dev, req, file_priv); 2894} 2895 2896/** 2897 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 2898 * @bpp: bits per pixels 2899 * @depth: bit depth per pixel 2900 * 2901 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 2902 * Useful in fbdev emulation code, since that deals in those values. 2903 */ 2904uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 2905{ 2906 uint32_t fmt; 2907 2908 switch (bpp) { 2909 case 8: 2910 fmt = DRM_FORMAT_C8; 2911 break; 2912 case 16: 2913 if (depth == 15) 2914 fmt = DRM_FORMAT_XRGB1555; 2915 else 2916 fmt = DRM_FORMAT_RGB565; 2917 break; 2918 case 24: 2919 fmt = DRM_FORMAT_RGB888; 2920 break; 2921 case 32: 2922 if (depth == 24) 2923 fmt = DRM_FORMAT_XRGB8888; 2924 else if (depth == 30) 2925 fmt = DRM_FORMAT_XRGB2101010; 2926 else 2927 fmt = DRM_FORMAT_ARGB8888; 2928 break; 2929 default: 2930 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 2931 fmt = DRM_FORMAT_XRGB8888; 2932 break; 2933 } 2934 2935 return fmt; 2936} 2937EXPORT_SYMBOL(drm_mode_legacy_fb_format); 2938 2939/** 2940 * drm_mode_addfb - add an FB to the graphics configuration 2941 * @dev: drm device for the ioctl 2942 * @data: data pointer for the ioctl 2943 * @file_priv: drm file for the ioctl call 2944 * 2945 * Add a new FB to the specified CRTC, given a user request. This is the 2946 * original addfb ioclt which only supported RGB formats. 2947 * 2948 * Called by the user via ioctl. 2949 * 2950 * Returns: 2951 * Zero on success, errno on failure. 2952 */ 2953int drm_mode_addfb(struct drm_device *dev, 2954 void *data, struct drm_file *file_priv) 2955{ 2956 struct drm_mode_fb_cmd *or = data; 2957 struct drm_mode_fb_cmd2 r = {}; 2958 struct drm_mode_config *config = &dev->mode_config; 2959 struct drm_framebuffer *fb; 2960 int ret = 0; 2961 2962 /* Use new struct with format internally */ 2963 r.fb_id = or->fb_id; 2964 r.width = or->width; 2965 r.height = or->height; 2966 r.pitches[0] = or->pitch; 2967 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 2968 r.handles[0] = or->handle; 2969 2970 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2971 return -EINVAL; 2972 2973 if ((config->min_width > r.width) || (r.width > config->max_width)) 2974 return -EINVAL; 2975 2976 if ((config->min_height > r.height) || (r.height > config->max_height)) 2977 return -EINVAL; 2978 2979 fb = dev->mode_config.funcs->fb_create(dev, file_priv, &r); 2980 if (IS_ERR(fb)) { 2981 DRM_DEBUG_KMS("could not create framebuffer\n"); 2982 return PTR_ERR(fb); 2983 } 2984 2985 mutex_lock(&file_priv->fbs_lock); 2986 or->fb_id = fb->base.id; 2987 list_add(&fb->filp_head, &file_priv->fbs); 2988 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 2989 mutex_unlock(&file_priv->fbs_lock); 2990 2991 return ret; 2992} 2993 2994static int format_check(const struct drm_mode_fb_cmd2 *r) 2995{ 2996 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 2997 2998 switch (format) { 2999 case DRM_FORMAT_C8: 3000 case DRM_FORMAT_RGB332: 3001 case DRM_FORMAT_BGR233: 3002 case DRM_FORMAT_XRGB4444: 3003 case DRM_FORMAT_XBGR4444: 3004 case DRM_FORMAT_RGBX4444: 3005 case DRM_FORMAT_BGRX4444: 3006 case DRM_FORMAT_ARGB4444: 3007 case DRM_FORMAT_ABGR4444: 3008 case DRM_FORMAT_RGBA4444: 3009 case DRM_FORMAT_BGRA4444: 3010 case DRM_FORMAT_XRGB1555: 3011 case DRM_FORMAT_XBGR1555: 3012 case DRM_FORMAT_RGBX5551: 3013 case DRM_FORMAT_BGRX5551: 3014 case DRM_FORMAT_ARGB1555: 3015 case DRM_FORMAT_ABGR1555: 3016 case DRM_FORMAT_RGBA5551: 3017 case DRM_FORMAT_BGRA5551: 3018 case DRM_FORMAT_RGB565: 3019 case DRM_FORMAT_BGR565: 3020 case DRM_FORMAT_RGB888: 3021 case DRM_FORMAT_BGR888: 3022 case DRM_FORMAT_XRGB8888: 3023 case DRM_FORMAT_XBGR8888: 3024 case DRM_FORMAT_RGBX8888: 3025 case DRM_FORMAT_BGRX8888: 3026 case DRM_FORMAT_ARGB8888: 3027 case DRM_FORMAT_ABGR8888: 3028 case DRM_FORMAT_RGBA8888: 3029 case DRM_FORMAT_BGRA8888: 3030 case DRM_FORMAT_XRGB2101010: 3031 case DRM_FORMAT_XBGR2101010: 3032 case DRM_FORMAT_RGBX1010102: 3033 case DRM_FORMAT_BGRX1010102: 3034 case DRM_FORMAT_ARGB2101010: 3035 case DRM_FORMAT_ABGR2101010: 3036 case DRM_FORMAT_RGBA1010102: 3037 case DRM_FORMAT_BGRA1010102: 3038 case DRM_FORMAT_YUYV: 3039 case DRM_FORMAT_YVYU: 3040 case DRM_FORMAT_UYVY: 3041 case DRM_FORMAT_VYUY: 3042 case DRM_FORMAT_AYUV: 3043 case DRM_FORMAT_NV12: 3044 case DRM_FORMAT_NV21: 3045 case DRM_FORMAT_NV16: 3046 case DRM_FORMAT_NV61: 3047 case DRM_FORMAT_NV24: 3048 case DRM_FORMAT_NV42: 3049 case DRM_FORMAT_YUV410: 3050 case DRM_FORMAT_YVU410: 3051 case DRM_FORMAT_YUV411: 3052 case DRM_FORMAT_YVU411: 3053 case DRM_FORMAT_YUV420: 3054 case DRM_FORMAT_YVU420: 3055 case DRM_FORMAT_YUV422: 3056 case DRM_FORMAT_YVU422: 3057 case DRM_FORMAT_YUV444: 3058 case DRM_FORMAT_YVU444: 3059 return 0; 3060 default: 3061 DRM_DEBUG_KMS("invalid pixel format %s\n", 3062 drm_get_format_name(r->pixel_format)); 3063 return -EINVAL; 3064 } 3065} 3066 3067static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3068{ 3069 int ret, hsub, vsub, num_planes, i; 3070 3071 ret = format_check(r); 3072 if (ret) { 3073 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3074 drm_get_format_name(r->pixel_format)); 3075 return ret; 3076 } 3077 3078 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3079 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3080 num_planes = drm_format_num_planes(r->pixel_format); 3081 3082 if (r->width == 0 || r->width % hsub) { 3083 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->height); 3084 return -EINVAL; 3085 } 3086 3087 if (r->height == 0 || r->height % vsub) { 3088 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3089 return -EINVAL; 3090 } 3091 3092 for (i = 0; i < num_planes; i++) { 3093 unsigned int width = r->width / (i != 0 ? hsub : 1); 3094 unsigned int height = r->height / (i != 0 ? vsub : 1); 3095 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3096 3097 if (!r->handles[i]) { 3098 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3099 return -EINVAL; 3100 } 3101 3102 if ((uint64_t) width * cpp > UINT_MAX) 3103 return -ERANGE; 3104 3105 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3106 return -ERANGE; 3107 3108 if (r->pitches[i] < width * cpp) { 3109 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3110 return -EINVAL; 3111 } 3112 } 3113 3114 return 0; 3115} 3116 3117static struct drm_framebuffer *add_framebuffer_internal(struct drm_device *dev, 3118 struct drm_mode_fb_cmd2 *r, 3119 struct drm_file *file_priv) 3120{ 3121 struct drm_mode_config *config = &dev->mode_config; 3122 struct drm_framebuffer *fb; 3123 int ret; 3124 3125 if (r->flags & ~DRM_MODE_FB_INTERLACED) { 3126 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3127 return ERR_PTR(-EINVAL); 3128 } 3129 3130 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3131 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3132 r->width, config->min_width, config->max_width); 3133 return ERR_PTR(-EINVAL); 3134 } 3135 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3136 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3137 r->height, config->min_height, config->max_height); 3138 return ERR_PTR(-EINVAL); 3139 } 3140 3141 ret = framebuffer_check(r); 3142 if (ret) 3143 return ERR_PTR(ret); 3144 3145 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3146 if (IS_ERR(fb)) { 3147 DRM_DEBUG_KMS("could not create framebuffer\n"); 3148 return fb; 3149 } 3150 3151 mutex_lock(&file_priv->fbs_lock); 3152 r->fb_id = fb->base.id; 3153 list_add(&fb->filp_head, &file_priv->fbs); 3154 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3155 mutex_unlock(&file_priv->fbs_lock); 3156 3157 return fb; 3158} 3159 3160/** 3161 * drm_mode_addfb2 - add an FB to the graphics configuration 3162 * @dev: drm device for the ioctl 3163 * @data: data pointer for the ioctl 3164 * @file_priv: drm file for the ioctl call 3165 * 3166 * Add a new FB to the specified CRTC, given a user request with format. This is 3167 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3168 * and uses fourcc codes as pixel format specifiers. 3169 * 3170 * Called by the user via ioctl. 3171 * 3172 * Returns: 3173 * Zero on success, errno on failure. 3174 */ 3175int drm_mode_addfb2(struct drm_device *dev, 3176 void *data, struct drm_file *file_priv) 3177{ 3178 struct drm_framebuffer *fb; 3179 3180 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3181 return -EINVAL; 3182 3183 fb = add_framebuffer_internal(dev, data, file_priv); 3184 if (IS_ERR(fb)) 3185 return PTR_ERR(fb); 3186 3187 return 0; 3188} 3189 3190/** 3191 * drm_mode_rmfb - remove an FB from the configuration 3192 * @dev: drm device for the ioctl 3193 * @data: data pointer for the ioctl 3194 * @file_priv: drm file for the ioctl call 3195 * 3196 * Remove the FB specified by the user. 3197 * 3198 * Called by the user via ioctl. 3199 * 3200 * Returns: 3201 * Zero on success, errno on failure. 3202 */ 3203int drm_mode_rmfb(struct drm_device *dev, 3204 void *data, struct drm_file *file_priv) 3205{ 3206 struct drm_framebuffer *fb = NULL; 3207 struct drm_framebuffer *fbl = NULL; 3208 uint32_t *id = data; 3209 int found = 0; 3210 3211 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3212 return -EINVAL; 3213 3214 mutex_lock(&file_priv->fbs_lock); 3215 mutex_lock(&dev->mode_config.fb_lock); 3216 fb = __drm_framebuffer_lookup(dev, *id); 3217 if (!fb) 3218 goto fail_lookup; 3219 3220 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3221 if (fb == fbl) 3222 found = 1; 3223 if (!found) 3224 goto fail_lookup; 3225 3226 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ 3227 __drm_framebuffer_unregister(dev, fb); 3228 3229 list_del_init(&fb->filp_head); 3230 mutex_unlock(&dev->mode_config.fb_lock); 3231 mutex_unlock(&file_priv->fbs_lock); 3232 3233 drm_framebuffer_remove(fb); 3234 3235 return 0; 3236 3237fail_lookup: 3238 mutex_unlock(&dev->mode_config.fb_lock); 3239 mutex_unlock(&file_priv->fbs_lock); 3240 3241 return -ENOENT; 3242} 3243 3244/** 3245 * drm_mode_getfb - get FB info 3246 * @dev: drm device for the ioctl 3247 * @data: data pointer for the ioctl 3248 * @file_priv: drm file for the ioctl call 3249 * 3250 * Lookup the FB given its ID and return info about it. 3251 * 3252 * Called by the user via ioctl. 3253 * 3254 * Returns: 3255 * Zero on success, errno on failure. 3256 */ 3257int drm_mode_getfb(struct drm_device *dev, 3258 void *data, struct drm_file *file_priv) 3259{ 3260 struct drm_mode_fb_cmd *r = data; 3261 struct drm_framebuffer *fb; 3262 int ret; 3263 3264 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3265 return -EINVAL; 3266 3267 fb = drm_framebuffer_lookup(dev, r->fb_id); 3268 if (!fb) 3269 return -ENOENT; 3270 3271 r->height = fb->height; 3272 r->width = fb->width; 3273 r->depth = fb->depth; 3274 r->bpp = fb->bits_per_pixel; 3275 r->pitch = fb->pitches[0]; 3276 if (fb->funcs->create_handle) { 3277 if (file_priv->is_master || capable(CAP_SYS_ADMIN) || 3278 drm_is_control_client(file_priv)) { 3279 ret = fb->funcs->create_handle(fb, file_priv, 3280 &r->handle); 3281 } else { 3282 /* GET_FB() is an unprivileged ioctl so we must not 3283 * return a buffer-handle to non-master processes! For 3284 * backwards-compatibility reasons, we cannot make 3285 * GET_FB() privileged, so just return an invalid handle 3286 * for non-masters. */ 3287 r->handle = 0; 3288 ret = 0; 3289 } 3290 } else { 3291 ret = -ENODEV; 3292 } 3293 3294 drm_framebuffer_unreference(fb); 3295 3296 return ret; 3297} 3298 3299/** 3300 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3301 * @dev: drm device for the ioctl 3302 * @data: data pointer for the ioctl 3303 * @file_priv: drm file for the ioctl call 3304 * 3305 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3306 * rectangle list. Generic userspace which does frontbuffer rendering must call 3307 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3308 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3309 * 3310 * Modesetting drivers which always update the frontbuffer do not need to 3311 * implement the corresponding ->dirty framebuffer callback. 3312 * 3313 * Called by the user via ioctl. 3314 * 3315 * Returns: 3316 * Zero on success, errno on failure. 3317 */ 3318int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3319 void *data, struct drm_file *file_priv) 3320{ 3321 struct drm_clip_rect __user *clips_ptr; 3322 struct drm_clip_rect *clips = NULL; 3323 struct drm_mode_fb_dirty_cmd *r = data; 3324 struct drm_framebuffer *fb; 3325 unsigned flags; 3326 int num_clips; 3327 int ret; 3328 3329 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3330 return -EINVAL; 3331 3332 fb = drm_framebuffer_lookup(dev, r->fb_id); 3333 if (!fb) 3334 return -ENOENT; 3335 3336 num_clips = r->num_clips; 3337 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3338 3339 if (!num_clips != !clips_ptr) { 3340 ret = -EINVAL; 3341 goto out_err1; 3342 } 3343 3344 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3345 3346 /* If userspace annotates copy, clips must come in pairs */ 3347 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3348 ret = -EINVAL; 3349 goto out_err1; 3350 } 3351 3352 if (num_clips && clips_ptr) { 3353 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3354 ret = -EINVAL; 3355 goto out_err1; 3356 } 3357 clips = kzalloc(num_clips * sizeof(*clips), GFP_KERNEL); 3358 if (!clips) { 3359 ret = -ENOMEM; 3360 goto out_err1; 3361 } 3362 3363 ret = copy_from_user(clips, clips_ptr, 3364 num_clips * sizeof(*clips)); 3365 if (ret) { 3366 ret = -EFAULT; 3367 goto out_err2; 3368 } 3369 } 3370 3371 if (fb->funcs->dirty) { 3372 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3373 clips, num_clips); 3374 } else { 3375 ret = -ENOSYS; 3376 } 3377 3378out_err2: 3379 kfree(clips); 3380out_err1: 3381 drm_framebuffer_unreference(fb); 3382 3383 return ret; 3384} 3385 3386 3387/** 3388 * drm_fb_release - remove and free the FBs on this file 3389 * @priv: drm file for the ioctl 3390 * 3391 * Destroy all the FBs associated with @filp. 3392 * 3393 * Called by the user via ioctl. 3394 * 3395 * Returns: 3396 * Zero on success, errno on failure. 3397 */ 3398void drm_fb_release(struct drm_file *priv) 3399{ 3400 struct drm_device *dev = priv->minor->dev; 3401 struct drm_framebuffer *fb, *tfb; 3402 3403 /* 3404 * When the file gets released that means no one else can access the fb 3405 * list any more, so no need to grab fpriv->fbs_lock. And we need to to 3406 * avoid upsetting lockdep since the universal cursor code adds a 3407 * framebuffer while holding mutex locks. 3408 * 3409 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3410 * locks is impossible here since no one else but this function can get 3411 * at it any more. 3412 */ 3413 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3414 3415 mutex_lock(&dev->mode_config.fb_lock); 3416 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ 3417 __drm_framebuffer_unregister(dev, fb); 3418 mutex_unlock(&dev->mode_config.fb_lock); 3419 3420 list_del_init(&fb->filp_head); 3421 3422 /* This will also drop the fpriv->fbs reference. */ 3423 drm_framebuffer_remove(fb); 3424 } 3425} 3426 3427/** 3428 * drm_property_create - create a new property type 3429 * @dev: drm device 3430 * @flags: flags specifying the property type 3431 * @name: name of the property 3432 * @num_values: number of pre-defined values 3433 * 3434 * This creates a new generic drm property which can then be attached to a drm 3435 * object with drm_object_attach_property. The returned property object must be 3436 * freed with drm_property_destroy. 3437 * 3438 * Returns: 3439 * A pointer to the newly created property on success, NULL on failure. 3440 */ 3441struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3442 const char *name, int num_values) 3443{ 3444 struct drm_property *property = NULL; 3445 int ret; 3446 3447 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3448 if (!property) 3449 return NULL; 3450 3451 property->dev = dev; 3452 3453 if (num_values) { 3454 property->values = kzalloc(sizeof(uint64_t)*num_values, GFP_KERNEL); 3455 if (!property->values) 3456 goto fail; 3457 } 3458 3459 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3460 if (ret) 3461 goto fail; 3462 3463 property->flags = flags; 3464 property->num_values = num_values; 3465 INIT_LIST_HEAD(&property->enum_blob_list); 3466 3467 if (name) { 3468 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3469 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3470 } 3471 3472 list_add_tail(&property->head, &dev->mode_config.property_list); 3473 3474 WARN_ON(!drm_property_type_valid(property)); 3475 3476 return property; 3477fail: 3478 kfree(property->values); 3479 kfree(property); 3480 return NULL; 3481} 3482EXPORT_SYMBOL(drm_property_create); 3483 3484/** 3485 * drm_property_create_enum - create a new enumeration property type 3486 * @dev: drm device 3487 * @flags: flags specifying the property type 3488 * @name: name of the property 3489 * @props: enumeration lists with property values 3490 * @num_values: number of pre-defined values 3491 * 3492 * This creates a new generic drm property which can then be attached to a drm 3493 * object with drm_object_attach_property. The returned property object must be 3494 * freed with drm_property_destroy. 3495 * 3496 * Userspace is only allowed to set one of the predefined values for enumeration 3497 * properties. 3498 * 3499 * Returns: 3500 * A pointer to the newly created property on success, NULL on failure. 3501 */ 3502struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3503 const char *name, 3504 const struct drm_prop_enum_list *props, 3505 int num_values) 3506{ 3507 struct drm_property *property; 3508 int i, ret; 3509 3510 flags |= DRM_MODE_PROP_ENUM; 3511 3512 property = drm_property_create(dev, flags, name, num_values); 3513 if (!property) 3514 return NULL; 3515 3516 for (i = 0; i < num_values; i++) { 3517 ret = drm_property_add_enum(property, i, 3518 props[i].type, 3519 props[i].name); 3520 if (ret) { 3521 drm_property_destroy(dev, property); 3522 return NULL; 3523 } 3524 } 3525 3526 return property; 3527} 3528EXPORT_SYMBOL(drm_property_create_enum); 3529 3530/** 3531 * drm_property_create_bitmask - create a new bitmask property type 3532 * @dev: drm device 3533 * @flags: flags specifying the property type 3534 * @name: name of the property 3535 * @props: enumeration lists with property bitflags 3536 * @num_props: size of the @props array 3537 * @supported_bits: bitmask of all supported enumeration values 3538 * 3539 * This creates a new bitmask drm property which can then be attached to a drm 3540 * object with drm_object_attach_property. The returned property object must be 3541 * freed with drm_property_destroy. 3542 * 3543 * Compared to plain enumeration properties userspace is allowed to set any 3544 * or'ed together combination of the predefined property bitflag values 3545 * 3546 * Returns: 3547 * A pointer to the newly created property on success, NULL on failure. 3548 */ 3549struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3550 int flags, const char *name, 3551 const struct drm_prop_enum_list *props, 3552 int num_props, 3553 uint64_t supported_bits) 3554{ 3555 struct drm_property *property; 3556 int i, ret, index = 0; 3557 int num_values = hweight64(supported_bits); 3558 3559 flags |= DRM_MODE_PROP_BITMASK; 3560 3561 property = drm_property_create(dev, flags, name, num_values); 3562 if (!property) 3563 return NULL; 3564 for (i = 0; i < num_props; i++) { 3565 if (!(supported_bits & (1ULL << props[i].type))) 3566 continue; 3567 3568 if (WARN_ON(index >= num_values)) { 3569 drm_property_destroy(dev, property); 3570 return NULL; 3571 } 3572 3573 ret = drm_property_add_enum(property, index++, 3574 props[i].type, 3575 props[i].name); 3576 if (ret) { 3577 drm_property_destroy(dev, property); 3578 return NULL; 3579 } 3580 } 3581 3582 return property; 3583} 3584EXPORT_SYMBOL(drm_property_create_bitmask); 3585 3586static struct drm_property *property_create_range(struct drm_device *dev, 3587 int flags, const char *name, 3588 uint64_t min, uint64_t max) 3589{ 3590 struct drm_property *property; 3591 3592 property = drm_property_create(dev, flags, name, 2); 3593 if (!property) 3594 return NULL; 3595 3596 property->values[0] = min; 3597 property->values[1] = max; 3598 3599 return property; 3600} 3601 3602/** 3603 * drm_property_create_range - create a new ranged property type 3604 * @dev: drm device 3605 * @flags: flags specifying the property type 3606 * @name: name of the property 3607 * @min: minimum value of the property 3608 * @max: maximum value of the property 3609 * 3610 * This creates a new generic drm property which can then be attached to a drm 3611 * object with drm_object_attach_property. The returned property object must be 3612 * freed with drm_property_destroy. 3613 * 3614 * Userspace is allowed to set any interger value in the (min, max) range 3615 * inclusive. 3616 * 3617 * Returns: 3618 * A pointer to the newly created property on success, NULL on failure. 3619 */ 3620struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3621 const char *name, 3622 uint64_t min, uint64_t max) 3623{ 3624 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3625 name, min, max); 3626} 3627EXPORT_SYMBOL(drm_property_create_range); 3628 3629struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3630 int flags, const char *name, 3631 int64_t min, int64_t max) 3632{ 3633 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3634 name, I642U64(min), I642U64(max)); 3635} 3636EXPORT_SYMBOL(drm_property_create_signed_range); 3637 3638struct drm_property *drm_property_create_object(struct drm_device *dev, 3639 int flags, const char *name, uint32_t type) 3640{ 3641 struct drm_property *property; 3642 3643 flags |= DRM_MODE_PROP_OBJECT; 3644 3645 property = drm_property_create(dev, flags, name, 1); 3646 if (!property) 3647 return NULL; 3648 3649 property->values[0] = type; 3650 3651 return property; 3652} 3653EXPORT_SYMBOL(drm_property_create_object); 3654 3655/** 3656 * drm_property_add_enum - add a possible value to an enumeration property 3657 * @property: enumeration property to change 3658 * @index: index of the new enumeration 3659 * @value: value of the new enumeration 3660 * @name: symbolic name of the new enumeration 3661 * 3662 * This functions adds enumerations to a property. 3663 * 3664 * It's use is deprecated, drivers should use one of the more specific helpers 3665 * to directly create the property with all enumerations already attached. 3666 * 3667 * Returns: 3668 * Zero on success, error code on failure. 3669 */ 3670int drm_property_add_enum(struct drm_property *property, int index, 3671 uint64_t value, const char *name) 3672{ 3673 struct drm_property_enum *prop_enum; 3674 3675 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3676 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3677 return -EINVAL; 3678 3679 /* 3680 * Bitmask enum properties have the additional constraint of values 3681 * from 0 to 63 3682 */ 3683 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3684 (value > 63)) 3685 return -EINVAL; 3686 3687 if (!list_empty(&property->enum_blob_list)) { 3688 list_for_each_entry(prop_enum, &property->enum_blob_list, head) { 3689 if (prop_enum->value == value) { 3690 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3691 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3692 return 0; 3693 } 3694 } 3695 } 3696 3697 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3698 if (!prop_enum) 3699 return -ENOMEM; 3700 3701 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3702 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3703 prop_enum->value = value; 3704 3705 property->values[index] = value; 3706 list_add_tail(&prop_enum->head, &property->enum_blob_list); 3707 return 0; 3708} 3709EXPORT_SYMBOL(drm_property_add_enum); 3710 3711/** 3712 * drm_property_destroy - destroy a drm property 3713 * @dev: drm device 3714 * @property: property to destry 3715 * 3716 * This function frees a property including any attached resources like 3717 * enumeration values. 3718 */ 3719void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 3720{ 3721 struct drm_property_enum *prop_enum, *pt; 3722 3723 list_for_each_entry_safe(prop_enum, pt, &property->enum_blob_list, head) { 3724 list_del(&prop_enum->head); 3725 kfree(prop_enum); 3726 } 3727 3728 if (property->num_values) 3729 kfree(property->values); 3730 drm_mode_object_put(dev, &property->base); 3731 list_del(&property->head); 3732 kfree(property); 3733} 3734EXPORT_SYMBOL(drm_property_destroy); 3735 3736/** 3737 * drm_object_attach_property - attach a property to a modeset object 3738 * @obj: drm modeset object 3739 * @property: property to attach 3740 * @init_val: initial value of the property 3741 * 3742 * This attaches the given property to the modeset object with the given initial 3743 * value. Currently this function cannot fail since the properties are stored in 3744 * a statically sized array. 3745 */ 3746void drm_object_attach_property(struct drm_mode_object *obj, 3747 struct drm_property *property, 3748 uint64_t init_val) 3749{ 3750 int count = obj->properties->count; 3751 3752 if (count == DRM_OBJECT_MAX_PROPERTY) { 3753 WARN(1, "Failed to attach object property (type: 0x%x). Please " 3754 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 3755 "you see this message on the same object type.\n", 3756 obj->type); 3757 return; 3758 } 3759 3760 obj->properties->ids[count] = property->base.id; 3761 obj->properties->values[count] = init_val; 3762 obj->properties->count++; 3763} 3764EXPORT_SYMBOL(drm_object_attach_property); 3765 3766/** 3767 * drm_object_property_set_value - set the value of a property 3768 * @obj: drm mode object to set property value for 3769 * @property: property to set 3770 * @val: value the property should be set to 3771 * 3772 * This functions sets a given property on a given object. This function only 3773 * changes the software state of the property, it does not call into the 3774 * driver's ->set_property callback. 3775 * 3776 * Returns: 3777 * Zero on success, error code on failure. 3778 */ 3779int drm_object_property_set_value(struct drm_mode_object *obj, 3780 struct drm_property *property, uint64_t val) 3781{ 3782 int i; 3783 3784 for (i = 0; i < obj->properties->count; i++) { 3785 if (obj->properties->ids[i] == property->base.id) { 3786 obj->properties->values[i] = val; 3787 return 0; 3788 } 3789 } 3790 3791 return -EINVAL; 3792} 3793EXPORT_SYMBOL(drm_object_property_set_value); 3794 3795/** 3796 * drm_object_property_get_value - retrieve the value of a property 3797 * @obj: drm mode object to get property value from 3798 * @property: property to retrieve 3799 * @val: storage for the property value 3800 * 3801 * This function retrieves the softare state of the given property for the given 3802 * property. Since there is no driver callback to retrieve the current property 3803 * value this might be out of sync with the hardware, depending upon the driver 3804 * and property. 3805 * 3806 * Returns: 3807 * Zero on success, error code on failure. 3808 */ 3809int drm_object_property_get_value(struct drm_mode_object *obj, 3810 struct drm_property *property, uint64_t *val) 3811{ 3812 int i; 3813 3814 for (i = 0; i < obj->properties->count; i++) { 3815 if (obj->properties->ids[i] == property->base.id) { 3816 *val = obj->properties->values[i]; 3817 return 0; 3818 } 3819 } 3820 3821 return -EINVAL; 3822} 3823EXPORT_SYMBOL(drm_object_property_get_value); 3824 3825/** 3826 * drm_mode_getproperty_ioctl - get the current value of a connector's property 3827 * @dev: DRM device 3828 * @data: ioctl data 3829 * @file_priv: DRM file info 3830 * 3831 * This function retrieves the current value for an connectors's property. 3832 * 3833 * Called by the user via ioctl. 3834 * 3835 * Returns: 3836 * Zero on success, errno on failure. 3837 */ 3838int drm_mode_getproperty_ioctl(struct drm_device *dev, 3839 void *data, struct drm_file *file_priv) 3840{ 3841 struct drm_mode_get_property *out_resp = data; 3842 struct drm_property *property; 3843 int enum_count = 0; 3844 int blob_count = 0; 3845 int value_count = 0; 3846 int ret = 0, i; 3847 int copied; 3848 struct drm_property_enum *prop_enum; 3849 struct drm_mode_property_enum __user *enum_ptr; 3850 struct drm_property_blob *prop_blob; 3851 uint32_t __user *blob_id_ptr; 3852 uint64_t __user *values_ptr; 3853 uint32_t __user *blob_length_ptr; 3854 3855 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3856 return -EINVAL; 3857 3858 drm_modeset_lock_all(dev); 3859 property = drm_property_find(dev, out_resp->prop_id); 3860 if (!property) { 3861 ret = -ENOENT; 3862 goto done; 3863 } 3864 3865 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3866 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 3867 list_for_each_entry(prop_enum, &property->enum_blob_list, head) 3868 enum_count++; 3869 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 3870 list_for_each_entry(prop_blob, &property->enum_blob_list, head) 3871 blob_count++; 3872 } 3873 3874 value_count = property->num_values; 3875 3876 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 3877 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 3878 out_resp->flags = property->flags; 3879 3880 if ((out_resp->count_values >= value_count) && value_count) { 3881 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 3882 for (i = 0; i < value_count; i++) { 3883 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 3884 ret = -EFAULT; 3885 goto done; 3886 } 3887 } 3888 } 3889 out_resp->count_values = value_count; 3890 3891 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3892 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 3893 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 3894 copied = 0; 3895 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 3896 list_for_each_entry(prop_enum, &property->enum_blob_list, head) { 3897 3898 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 3899 ret = -EFAULT; 3900 goto done; 3901 } 3902 3903 if (copy_to_user(&enum_ptr[copied].name, 3904 &prop_enum->name, DRM_PROP_NAME_LEN)) { 3905 ret = -EFAULT; 3906 goto done; 3907 } 3908 copied++; 3909 } 3910 } 3911 out_resp->count_enum_blobs = enum_count; 3912 } 3913 3914 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 3915 if ((out_resp->count_enum_blobs >= blob_count) && blob_count) { 3916 copied = 0; 3917 blob_id_ptr = (uint32_t __user *)(unsigned long)out_resp->enum_blob_ptr; 3918 blob_length_ptr = (uint32_t __user *)(unsigned long)out_resp->values_ptr; 3919 3920 list_for_each_entry(prop_blob, &property->enum_blob_list, head) { 3921 if (put_user(prop_blob->base.id, blob_id_ptr + copied)) { 3922 ret = -EFAULT; 3923 goto done; 3924 } 3925 3926 if (put_user(prop_blob->length, blob_length_ptr + copied)) { 3927 ret = -EFAULT; 3928 goto done; 3929 } 3930 3931 copied++; 3932 } 3933 } 3934 out_resp->count_enum_blobs = blob_count; 3935 } 3936done: 3937 drm_modeset_unlock_all(dev); 3938 return ret; 3939} 3940 3941static struct drm_property_blob *drm_property_create_blob(struct drm_device *dev, int length, 3942 void *data) 3943{ 3944 struct drm_property_blob *blob; 3945 int ret; 3946 3947 if (!length || !data) 3948 return NULL; 3949 3950 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 3951 if (!blob) 3952 return NULL; 3953 3954 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 3955 if (ret) { 3956 kfree(blob); 3957 return NULL; 3958 } 3959 3960 blob->length = length; 3961 3962 memcpy(blob->data, data, length); 3963 3964 list_add_tail(&blob->head, &dev->mode_config.property_blob_list); 3965 return blob; 3966} 3967 3968static void drm_property_destroy_blob(struct drm_device *dev, 3969 struct drm_property_blob *blob) 3970{ 3971 drm_mode_object_put(dev, &blob->base); 3972 list_del(&blob->head); 3973 kfree(blob); 3974} 3975 3976/** 3977 * drm_mode_getblob_ioctl - get the contents of a blob property value 3978 * @dev: DRM device 3979 * @data: ioctl data 3980 * @file_priv: DRM file info 3981 * 3982 * This function retrieves the contents of a blob property. The value stored in 3983 * an object's blob property is just a normal modeset object id. 3984 * 3985 * Called by the user via ioctl. 3986 * 3987 * Returns: 3988 * Zero on success, errno on failure. 3989 */ 3990int drm_mode_getblob_ioctl(struct drm_device *dev, 3991 void *data, struct drm_file *file_priv) 3992{ 3993 struct drm_mode_get_blob *out_resp = data; 3994 struct drm_property_blob *blob; 3995 int ret = 0; 3996 void __user *blob_ptr; 3997 3998 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3999 return -EINVAL; 4000 4001 drm_modeset_lock_all(dev); 4002 blob = drm_property_blob_find(dev, out_resp->blob_id); 4003 if (!blob) { 4004 ret = -ENOENT; 4005 goto done; 4006 } 4007 4008 if (out_resp->length == blob->length) { 4009 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4010 if (copy_to_user(blob_ptr, blob->data, blob->length)){ 4011 ret = -EFAULT; 4012 goto done; 4013 } 4014 } 4015 out_resp->length = blob->length; 4016 4017done: 4018 drm_modeset_unlock_all(dev); 4019 return ret; 4020} 4021 4022int drm_mode_connector_set_path_property(struct drm_connector *connector, 4023 char *path) 4024{ 4025 struct drm_device *dev = connector->dev; 4026 int ret, size; 4027 size = strlen(path) + 1; 4028 4029 connector->path_blob_ptr = drm_property_create_blob(connector->dev, 4030 size, path); 4031 if (!connector->path_blob_ptr) 4032 return -EINVAL; 4033 4034 ret = drm_object_property_set_value(&connector->base, 4035 dev->mode_config.path_property, 4036 connector->path_blob_ptr->base.id); 4037 return ret; 4038} 4039EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4040 4041/** 4042 * drm_mode_connector_update_edid_property - update the edid property of a connector 4043 * @connector: drm connector 4044 * @edid: new value of the edid property 4045 * 4046 * This function creates a new blob modeset object and assigns its id to the 4047 * connector's edid property. 4048 * 4049 * Returns: 4050 * Zero on success, errno on failure. 4051 */ 4052int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4053 struct edid *edid) 4054{ 4055 struct drm_device *dev = connector->dev; 4056 int ret, size; 4057 4058 /* ignore requests to set edid when overridden */ 4059 if (connector->override_edid) 4060 return 0; 4061 4062 if (connector->edid_blob_ptr) 4063 drm_property_destroy_blob(dev, connector->edid_blob_ptr); 4064 4065 /* Delete edid, when there is none. */ 4066 if (!edid) { 4067 connector->edid_blob_ptr = NULL; 4068 ret = drm_object_property_set_value(&connector->base, dev->mode_config.edid_property, 0); 4069 return ret; 4070 } 4071 4072 size = EDID_LENGTH * (1 + edid->extensions); 4073 connector->edid_blob_ptr = drm_property_create_blob(connector->dev, 4074 size, edid); 4075 if (!connector->edid_blob_ptr) 4076 return -EINVAL; 4077 4078 ret = drm_object_property_set_value(&connector->base, 4079 dev->mode_config.edid_property, 4080 connector->edid_blob_ptr->base.id); 4081 4082 return ret; 4083} 4084EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4085 4086static bool drm_property_change_is_valid(struct drm_property *property, 4087 uint64_t value) 4088{ 4089 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4090 return false; 4091 4092 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4093 if (value < property->values[0] || value > property->values[1]) 4094 return false; 4095 return true; 4096 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4097 int64_t svalue = U642I64(value); 4098 if (svalue < U642I64(property->values[0]) || 4099 svalue > U642I64(property->values[1])) 4100 return false; 4101 return true; 4102 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4103 int i; 4104 uint64_t valid_mask = 0; 4105 for (i = 0; i < property->num_values; i++) 4106 valid_mask |= (1ULL << property->values[i]); 4107 return !(value & ~valid_mask); 4108 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4109 /* Only the driver knows */ 4110 return true; 4111 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4112 struct drm_mode_object *obj; 4113 /* a zero value for an object property translates to null: */ 4114 if (value == 0) 4115 return true; 4116 /* 4117 * NOTE: use _object_find() directly to bypass restriction on 4118 * looking up refcnt'd objects (ie. fb's). For a refcnt'd 4119 * object this could race against object finalization, so it 4120 * simply tells us that the object *was* valid. Which is good 4121 * enough. 4122 */ 4123 obj = _object_find(property->dev, value, property->values[0]); 4124 return obj != NULL; 4125 } else { 4126 int i; 4127 for (i = 0; i < property->num_values; i++) 4128 if (property->values[i] == value) 4129 return true; 4130 return false; 4131 } 4132} 4133 4134/** 4135 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4136 * @dev: DRM device 4137 * @data: ioctl data 4138 * @file_priv: DRM file info 4139 * 4140 * This function sets the current value for a connectors's property. It also 4141 * calls into a driver's ->set_property callback to update the hardware state 4142 * 4143 * Called by the user via ioctl. 4144 * 4145 * Returns: 4146 * Zero on success, errno on failure. 4147 */ 4148int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4149 void *data, struct drm_file *file_priv) 4150{ 4151 struct drm_mode_connector_set_property *conn_set_prop = data; 4152 struct drm_mode_obj_set_property obj_set_prop = { 4153 .value = conn_set_prop->value, 4154 .prop_id = conn_set_prop->prop_id, 4155 .obj_id = conn_set_prop->connector_id, 4156 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4157 }; 4158 4159 /* It does all the locking and checking we need */ 4160 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4161} 4162 4163static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4164 struct drm_property *property, 4165 uint64_t value) 4166{ 4167 int ret = -EINVAL; 4168 struct drm_connector *connector = obj_to_connector(obj); 4169 4170 /* Do DPMS ourselves */ 4171 if (property == connector->dev->mode_config.dpms_property) { 4172 if (connector->funcs->dpms) 4173 (*connector->funcs->dpms)(connector, (int)value); 4174 ret = 0; 4175 } else if (connector->funcs->set_property) 4176 ret = connector->funcs->set_property(connector, property, value); 4177 4178 /* store the property value if successful */ 4179 if (!ret) 4180 drm_object_property_set_value(&connector->base, property, value); 4181 return ret; 4182} 4183 4184static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4185 struct drm_property *property, 4186 uint64_t value) 4187{ 4188 int ret = -EINVAL; 4189 struct drm_crtc *crtc = obj_to_crtc(obj); 4190 4191 if (crtc->funcs->set_property) 4192 ret = crtc->funcs->set_property(crtc, property, value); 4193 if (!ret) 4194 drm_object_property_set_value(obj, property, value); 4195 4196 return ret; 4197} 4198 4199/** 4200 * drm_mode_plane_set_obj_prop - set the value of a property 4201 * @plane: drm plane object to set property value for 4202 * @property: property to set 4203 * @value: value the property should be set to 4204 * 4205 * This functions sets a given property on a given plane object. This function 4206 * calls the driver's ->set_property callback and changes the software state of 4207 * the property if the callback succeeds. 4208 * 4209 * Returns: 4210 * Zero on success, error code on failure. 4211 */ 4212int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4213 struct drm_property *property, 4214 uint64_t value) 4215{ 4216 int ret = -EINVAL; 4217 struct drm_mode_object *obj = &plane->base; 4218 4219 if (plane->funcs->set_property) 4220 ret = plane->funcs->set_property(plane, property, value); 4221 if (!ret) 4222 drm_object_property_set_value(obj, property, value); 4223 4224 return ret; 4225} 4226EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4227 4228/** 4229 * drm_mode_getproperty_ioctl - get the current value of a object's property 4230 * @dev: DRM device 4231 * @data: ioctl data 4232 * @file_priv: DRM file info 4233 * 4234 * This function retrieves the current value for an object's property. Compared 4235 * to the connector specific ioctl this one is extended to also work on crtc and 4236 * plane objects. 4237 * 4238 * Called by the user via ioctl. 4239 * 4240 * Returns: 4241 * Zero on success, errno on failure. 4242 */ 4243int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4244 struct drm_file *file_priv) 4245{ 4246 struct drm_mode_obj_get_properties *arg = data; 4247 struct drm_mode_object *obj; 4248 int ret = 0; 4249 int i; 4250 int copied = 0; 4251 int props_count = 0; 4252 uint32_t __user *props_ptr; 4253 uint64_t __user *prop_values_ptr; 4254 4255 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4256 return -EINVAL; 4257 4258 drm_modeset_lock_all(dev); 4259 4260 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4261 if (!obj) { 4262 ret = -ENOENT; 4263 goto out; 4264 } 4265 if (!obj->properties) { 4266 ret = -EINVAL; 4267 goto out; 4268 } 4269 4270 props_count = obj->properties->count; 4271 4272 /* This ioctl is called twice, once to determine how much space is 4273 * needed, and the 2nd time to fill it. */ 4274 if ((arg->count_props >= props_count) && props_count) { 4275 copied = 0; 4276 props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); 4277 prop_values_ptr = (uint64_t __user *)(unsigned long) 4278 (arg->prop_values_ptr); 4279 for (i = 0; i < props_count; i++) { 4280 if (put_user(obj->properties->ids[i], 4281 props_ptr + copied)) { 4282 ret = -EFAULT; 4283 goto out; 4284 } 4285 if (put_user(obj->properties->values[i], 4286 prop_values_ptr + copied)) { 4287 ret = -EFAULT; 4288 goto out; 4289 } 4290 copied++; 4291 } 4292 } 4293 arg->count_props = props_count; 4294out: 4295 drm_modeset_unlock_all(dev); 4296 return ret; 4297} 4298 4299/** 4300 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 4301 * @dev: DRM device 4302 * @data: ioctl data 4303 * @file_priv: DRM file info 4304 * 4305 * This function sets the current value for an object's property. It also calls 4306 * into a driver's ->set_property callback to update the hardware state. 4307 * Compared to the connector specific ioctl this one is extended to also work on 4308 * crtc and plane objects. 4309 * 4310 * Called by the user via ioctl. 4311 * 4312 * Returns: 4313 * Zero on success, errno on failure. 4314 */ 4315int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 4316 struct drm_file *file_priv) 4317{ 4318 struct drm_mode_obj_set_property *arg = data; 4319 struct drm_mode_object *arg_obj; 4320 struct drm_mode_object *prop_obj; 4321 struct drm_property *property; 4322 int ret = -EINVAL; 4323 int i; 4324 4325 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4326 return -EINVAL; 4327 4328 drm_modeset_lock_all(dev); 4329 4330 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4331 if (!arg_obj) { 4332 ret = -ENOENT; 4333 goto out; 4334 } 4335 if (!arg_obj->properties) 4336 goto out; 4337 4338 for (i = 0; i < arg_obj->properties->count; i++) 4339 if (arg_obj->properties->ids[i] == arg->prop_id) 4340 break; 4341 4342 if (i == arg_obj->properties->count) 4343 goto out; 4344 4345 prop_obj = drm_mode_object_find(dev, arg->prop_id, 4346 DRM_MODE_OBJECT_PROPERTY); 4347 if (!prop_obj) { 4348 ret = -ENOENT; 4349 goto out; 4350 } 4351 property = obj_to_property(prop_obj); 4352 4353 if (!drm_property_change_is_valid(property, arg->value)) 4354 goto out; 4355 4356 switch (arg_obj->type) { 4357 case DRM_MODE_OBJECT_CONNECTOR: 4358 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 4359 arg->value); 4360 break; 4361 case DRM_MODE_OBJECT_CRTC: 4362 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 4363 break; 4364 case DRM_MODE_OBJECT_PLANE: 4365 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 4366 property, arg->value); 4367 break; 4368 } 4369 4370out: 4371 drm_modeset_unlock_all(dev); 4372 return ret; 4373} 4374 4375/** 4376 * drm_mode_connector_attach_encoder - attach a connector to an encoder 4377 * @connector: connector to attach 4378 * @encoder: encoder to attach @connector to 4379 * 4380 * This function links up a connector to an encoder. Note that the routing 4381 * restrictions between encoders and crtcs are exposed to userspace through the 4382 * possible_clones and possible_crtcs bitmasks. 4383 * 4384 * Returns: 4385 * Zero on success, errno on failure. 4386 */ 4387int drm_mode_connector_attach_encoder(struct drm_connector *connector, 4388 struct drm_encoder *encoder) 4389{ 4390 int i; 4391 4392 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 4393 if (connector->encoder_ids[i] == 0) { 4394 connector->encoder_ids[i] = encoder->base.id; 4395 return 0; 4396 } 4397 } 4398 return -ENOMEM; 4399} 4400EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 4401 4402/** 4403 * drm_mode_crtc_set_gamma_size - set the gamma table size 4404 * @crtc: CRTC to set the gamma table size for 4405 * @gamma_size: size of the gamma table 4406 * 4407 * Drivers which support gamma tables should set this to the supported gamma 4408 * table size when initializing the CRTC. Currently the drm core only supports a 4409 * fixed gamma table size. 4410 * 4411 * Returns: 4412 * Zero on success, errno on failure. 4413 */ 4414int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 4415 int gamma_size) 4416{ 4417 crtc->gamma_size = gamma_size; 4418 4419 crtc->gamma_store = kzalloc(gamma_size * sizeof(uint16_t) * 3, GFP_KERNEL); 4420 if (!crtc->gamma_store) { 4421 crtc->gamma_size = 0; 4422 return -ENOMEM; 4423 } 4424 4425 return 0; 4426} 4427EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 4428 4429/** 4430 * drm_mode_gamma_set_ioctl - set the gamma table 4431 * @dev: DRM device 4432 * @data: ioctl data 4433 * @file_priv: DRM file info 4434 * 4435 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 4436 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 4437 * 4438 * Called by the user via ioctl. 4439 * 4440 * Returns: 4441 * Zero on success, errno on failure. 4442 */ 4443int drm_mode_gamma_set_ioctl(struct drm_device *dev, 4444 void *data, struct drm_file *file_priv) 4445{ 4446 struct drm_mode_crtc_lut *crtc_lut = data; 4447 struct drm_crtc *crtc; 4448 void *r_base, *g_base, *b_base; 4449 int size; 4450 int ret = 0; 4451 4452 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4453 return -EINVAL; 4454 4455 drm_modeset_lock_all(dev); 4456 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 4457 if (!crtc) { 4458 ret = -ENOENT; 4459 goto out; 4460 } 4461 4462 if (crtc->funcs->gamma_set == NULL) { 4463 ret = -ENOSYS; 4464 goto out; 4465 } 4466 4467 /* memcpy into gamma store */ 4468 if (crtc_lut->gamma_size != crtc->gamma_size) { 4469 ret = -EINVAL; 4470 goto out; 4471 } 4472 4473 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 4474 r_base = crtc->gamma_store; 4475 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 4476 ret = -EFAULT; 4477 goto out; 4478 } 4479 4480 g_base = r_base + size; 4481 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 4482 ret = -EFAULT; 4483 goto out; 4484 } 4485 4486 b_base = g_base + size; 4487 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 4488 ret = -EFAULT; 4489 goto out; 4490 } 4491 4492 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 4493 4494out: 4495 drm_modeset_unlock_all(dev); 4496 return ret; 4497 4498} 4499 4500/** 4501 * drm_mode_gamma_get_ioctl - get the gamma table 4502 * @dev: DRM device 4503 * @data: ioctl data 4504 * @file_priv: DRM file info 4505 * 4506 * Copy the current gamma table into the storage provided. This also provides 4507 * the gamma table size the driver expects, which can be used to size the 4508 * allocated storage. 4509 * 4510 * Called by the user via ioctl. 4511 * 4512 * Returns: 4513 * Zero on success, errno on failure. 4514 */ 4515int drm_mode_gamma_get_ioctl(struct drm_device *dev, 4516 void *data, struct drm_file *file_priv) 4517{ 4518 struct drm_mode_crtc_lut *crtc_lut = data; 4519 struct drm_crtc *crtc; 4520 void *r_base, *g_base, *b_base; 4521 int size; 4522 int ret = 0; 4523 4524 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4525 return -EINVAL; 4526 4527 drm_modeset_lock_all(dev); 4528 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 4529 if (!crtc) { 4530 ret = -ENOENT; 4531 goto out; 4532 } 4533 4534 /* memcpy into gamma store */ 4535 if (crtc_lut->gamma_size != crtc->gamma_size) { 4536 ret = -EINVAL; 4537 goto out; 4538 } 4539 4540 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 4541 r_base = crtc->gamma_store; 4542 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 4543 ret = -EFAULT; 4544 goto out; 4545 } 4546 4547 g_base = r_base + size; 4548 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 4549 ret = -EFAULT; 4550 goto out; 4551 } 4552 4553 b_base = g_base + size; 4554 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 4555 ret = -EFAULT; 4556 goto out; 4557 } 4558out: 4559 drm_modeset_unlock_all(dev); 4560 return ret; 4561} 4562 4563/** 4564 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 4565 * @dev: DRM device 4566 * @data: ioctl data 4567 * @file_priv: DRM file info 4568 * 4569 * This schedules an asynchronous update on a given CRTC, called page flip. 4570 * Optionally a drm event is generated to signal the completion of the event. 4571 * Generic drivers cannot assume that a pageflip with changed framebuffer 4572 * properties (including driver specific metadata like tiling layout) will work, 4573 * but some drivers support e.g. pixel format changes through the pageflip 4574 * ioctl. 4575 * 4576 * Called by the user via ioctl. 4577 * 4578 * Returns: 4579 * Zero on success, errno on failure. 4580 */ 4581int drm_mode_page_flip_ioctl(struct drm_device *dev, 4582 void *data, struct drm_file *file_priv) 4583{ 4584 struct drm_mode_crtc_page_flip *page_flip = data; 4585 struct drm_crtc *crtc; 4586 struct drm_framebuffer *fb = NULL; 4587 struct drm_pending_vblank_event *e = NULL; 4588 unsigned long flags; 4589 int ret = -EINVAL; 4590 4591 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 4592 page_flip->reserved != 0) 4593 return -EINVAL; 4594 4595 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 4596 return -EINVAL; 4597 4598 crtc = drm_crtc_find(dev, page_flip->crtc_id); 4599 if (!crtc) 4600 return -ENOENT; 4601 4602 drm_modeset_lock_crtc(crtc); 4603 if (crtc->primary->fb == NULL) { 4604 /* The framebuffer is currently unbound, presumably 4605 * due to a hotplug event, that userspace has not 4606 * yet discovered. 4607 */ 4608 ret = -EBUSY; 4609 goto out; 4610 } 4611 4612 if (crtc->funcs->page_flip == NULL) 4613 goto out; 4614 4615 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 4616 if (!fb) { 4617 ret = -ENOENT; 4618 goto out; 4619 } 4620 4621 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 4622 if (ret) 4623 goto out; 4624 4625 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 4626 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 4627 ret = -EINVAL; 4628 goto out; 4629 } 4630 4631 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 4632 ret = -ENOMEM; 4633 spin_lock_irqsave(&dev->event_lock, flags); 4634 if (file_priv->event_space < sizeof e->event) { 4635 spin_unlock_irqrestore(&dev->event_lock, flags); 4636 goto out; 4637 } 4638 file_priv->event_space -= sizeof e->event; 4639 spin_unlock_irqrestore(&dev->event_lock, flags); 4640 4641 e = kzalloc(sizeof *e, GFP_KERNEL); 4642 if (e == NULL) { 4643 spin_lock_irqsave(&dev->event_lock, flags); 4644 file_priv->event_space += sizeof e->event; 4645 spin_unlock_irqrestore(&dev->event_lock, flags); 4646 goto out; 4647 } 4648 4649 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 4650 e->event.base.length = sizeof e->event; 4651 e->event.user_data = page_flip->user_data; 4652 e->base.event = &e->event.base; 4653 e->base.file_priv = file_priv; 4654 e->base.destroy = 4655 (void (*) (struct drm_pending_event *)) kfree; 4656 } 4657 4658 crtc->primary->old_fb = crtc->primary->fb; 4659 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 4660 if (ret) { 4661 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 4662 spin_lock_irqsave(&dev->event_lock, flags); 4663 file_priv->event_space += sizeof e->event; 4664 spin_unlock_irqrestore(&dev->event_lock, flags); 4665 kfree(e); 4666 } 4667 /* Keep the old fb, don't unref it. */ 4668 crtc->primary->old_fb = NULL; 4669 } else { 4670 /* 4671 * Warn if the driver hasn't properly updated the crtc->fb 4672 * field to reflect that the new framebuffer is now used. 4673 * Failing to do so will screw with the reference counting 4674 * on framebuffers. 4675 */ 4676 WARN_ON(crtc->primary->fb != fb); 4677 /* Unref only the old framebuffer. */ 4678 fb = NULL; 4679 } 4680 4681out: 4682 if (fb) 4683 drm_framebuffer_unreference(fb); 4684 if (crtc->primary->old_fb) 4685 drm_framebuffer_unreference(crtc->primary->old_fb); 4686 crtc->primary->old_fb = NULL; 4687 drm_modeset_unlock_crtc(crtc); 4688 4689 return ret; 4690} 4691 4692/** 4693 * drm_mode_config_reset - call ->reset callbacks 4694 * @dev: drm device 4695 * 4696 * This functions calls all the crtc's, encoder's and connector's ->reset 4697 * callback. Drivers can use this in e.g. their driver load or resume code to 4698 * reset hardware and software state. 4699 */ 4700void drm_mode_config_reset(struct drm_device *dev) 4701{ 4702 struct drm_crtc *crtc; 4703 struct drm_plane *plane; 4704 struct drm_encoder *encoder; 4705 struct drm_connector *connector; 4706 4707 list_for_each_entry(plane, &dev->mode_config.plane_list, head) 4708 if (plane->funcs->reset) 4709 plane->funcs->reset(plane); 4710 4711 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 4712 if (crtc->funcs->reset) 4713 crtc->funcs->reset(crtc); 4714 4715 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 4716 if (encoder->funcs->reset) 4717 encoder->funcs->reset(encoder); 4718 4719 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 4720 connector->status = connector_status_unknown; 4721 4722 if (connector->funcs->reset) 4723 connector->funcs->reset(connector); 4724 } 4725} 4726EXPORT_SYMBOL(drm_mode_config_reset); 4727 4728/** 4729 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 4730 * @dev: DRM device 4731 * @data: ioctl data 4732 * @file_priv: DRM file info 4733 * 4734 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 4735 * TTM or something else entirely) and returns the resulting buffer handle. This 4736 * handle can then be wrapped up into a framebuffer modeset object. 4737 * 4738 * Note that userspace is not allowed to use such objects for render 4739 * acceleration - drivers must create their own private ioctls for such a use 4740 * case. 4741 * 4742 * Called by the user via ioctl. 4743 * 4744 * Returns: 4745 * Zero on success, errno on failure. 4746 */ 4747int drm_mode_create_dumb_ioctl(struct drm_device *dev, 4748 void *data, struct drm_file *file_priv) 4749{ 4750 struct drm_mode_create_dumb *args = data; 4751 u32 cpp, stride, size; 4752 4753 if (!dev->driver->dumb_create) 4754 return -ENOSYS; 4755 if (!args->width || !args->height || !args->bpp) 4756 return -EINVAL; 4757 4758 /* overflow checks for 32bit size calculations */ 4759 /* NOTE: DIV_ROUND_UP() can overflow */ 4760 cpp = DIV_ROUND_UP(args->bpp, 8); 4761 if (!cpp || cpp > 0xffffffffU / args->width) 4762 return -EINVAL; 4763 stride = cpp * args->width; 4764 if (args->height > 0xffffffffU / stride) 4765 return -EINVAL; 4766 4767 /* test for wrap-around */ 4768 size = args->height * stride; 4769 if (PAGE_ALIGN(size) == 0) 4770 return -EINVAL; 4771 4772 return dev->driver->dumb_create(file_priv, dev, args); 4773} 4774 4775/** 4776 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 4777 * @dev: DRM device 4778 * @data: ioctl data 4779 * @file_priv: DRM file info 4780 * 4781 * Allocate an offset in the drm device node's address space to be able to 4782 * memory map a dumb buffer. 4783 * 4784 * Called by the user via ioctl. 4785 * 4786 * Returns: 4787 * Zero on success, errno on failure. 4788 */ 4789int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 4790 void *data, struct drm_file *file_priv) 4791{ 4792 struct drm_mode_map_dumb *args = data; 4793 4794 /* call driver ioctl to get mmap offset */ 4795 if (!dev->driver->dumb_map_offset) 4796 return -ENOSYS; 4797 4798 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 4799} 4800 4801/** 4802 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 4803 * @dev: DRM device 4804 * @data: ioctl data 4805 * @file_priv: DRM file info 4806 * 4807 * This destroys the userspace handle for the given dumb backing storage buffer. 4808 * Since buffer objects must be reference counted in the kernel a buffer object 4809 * won't be immediately freed if a framebuffer modeset object still uses it. 4810 * 4811 * Called by the user via ioctl. 4812 * 4813 * Returns: 4814 * Zero on success, errno on failure. 4815 */ 4816int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 4817 void *data, struct drm_file *file_priv) 4818{ 4819 struct drm_mode_destroy_dumb *args = data; 4820 4821 if (!dev->driver->dumb_destroy) 4822 return -ENOSYS; 4823 4824 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 4825} 4826 4827/** 4828 * drm_fb_get_bpp_depth - get the bpp/depth values for format 4829 * @format: pixel format (DRM_FORMAT_*) 4830 * @depth: storage for the depth value 4831 * @bpp: storage for the bpp value 4832 * 4833 * This only supports RGB formats here for compat with code that doesn't use 4834 * pixel formats directly yet. 4835 */ 4836void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 4837 int *bpp) 4838{ 4839 switch (format) { 4840 case DRM_FORMAT_C8: 4841 case DRM_FORMAT_RGB332: 4842 case DRM_FORMAT_BGR233: 4843 *depth = 8; 4844 *bpp = 8; 4845 break; 4846 case DRM_FORMAT_XRGB1555: 4847 case DRM_FORMAT_XBGR1555: 4848 case DRM_FORMAT_RGBX5551: 4849 case DRM_FORMAT_BGRX5551: 4850 case DRM_FORMAT_ARGB1555: 4851 case DRM_FORMAT_ABGR1555: 4852 case DRM_FORMAT_RGBA5551: 4853 case DRM_FORMAT_BGRA5551: 4854 *depth = 15; 4855 *bpp = 16; 4856 break; 4857 case DRM_FORMAT_RGB565: 4858 case DRM_FORMAT_BGR565: 4859 *depth = 16; 4860 *bpp = 16; 4861 break; 4862 case DRM_FORMAT_RGB888: 4863 case DRM_FORMAT_BGR888: 4864 *depth = 24; 4865 *bpp = 24; 4866 break; 4867 case DRM_FORMAT_XRGB8888: 4868 case DRM_FORMAT_XBGR8888: 4869 case DRM_FORMAT_RGBX8888: 4870 case DRM_FORMAT_BGRX8888: 4871 *depth = 24; 4872 *bpp = 32; 4873 break; 4874 case DRM_FORMAT_XRGB2101010: 4875 case DRM_FORMAT_XBGR2101010: 4876 case DRM_FORMAT_RGBX1010102: 4877 case DRM_FORMAT_BGRX1010102: 4878 case DRM_FORMAT_ARGB2101010: 4879 case DRM_FORMAT_ABGR2101010: 4880 case DRM_FORMAT_RGBA1010102: 4881 case DRM_FORMAT_BGRA1010102: 4882 *depth = 30; 4883 *bpp = 32; 4884 break; 4885 case DRM_FORMAT_ARGB8888: 4886 case DRM_FORMAT_ABGR8888: 4887 case DRM_FORMAT_RGBA8888: 4888 case DRM_FORMAT_BGRA8888: 4889 *depth = 32; 4890 *bpp = 32; 4891 break; 4892 default: 4893 DRM_DEBUG_KMS("unsupported pixel format %s\n", 4894 drm_get_format_name(format)); 4895 *depth = 0; 4896 *bpp = 0; 4897 break; 4898 } 4899} 4900EXPORT_SYMBOL(drm_fb_get_bpp_depth); 4901 4902/** 4903 * drm_format_num_planes - get the number of planes for format 4904 * @format: pixel format (DRM_FORMAT_*) 4905 * 4906 * Returns: 4907 * The number of planes used by the specified pixel format. 4908 */ 4909int drm_format_num_planes(uint32_t format) 4910{ 4911 switch (format) { 4912 case DRM_FORMAT_YUV410: 4913 case DRM_FORMAT_YVU410: 4914 case DRM_FORMAT_YUV411: 4915 case DRM_FORMAT_YVU411: 4916 case DRM_FORMAT_YUV420: 4917 case DRM_FORMAT_YVU420: 4918 case DRM_FORMAT_YUV422: 4919 case DRM_FORMAT_YVU422: 4920 case DRM_FORMAT_YUV444: 4921 case DRM_FORMAT_YVU444: 4922 return 3; 4923 case DRM_FORMAT_NV12: 4924 case DRM_FORMAT_NV21: 4925 case DRM_FORMAT_NV16: 4926 case DRM_FORMAT_NV61: 4927 case DRM_FORMAT_NV24: 4928 case DRM_FORMAT_NV42: 4929 return 2; 4930 default: 4931 return 1; 4932 } 4933} 4934EXPORT_SYMBOL(drm_format_num_planes); 4935 4936/** 4937 * drm_format_plane_cpp - determine the bytes per pixel value 4938 * @format: pixel format (DRM_FORMAT_*) 4939 * @plane: plane index 4940 * 4941 * Returns: 4942 * The bytes per pixel value for the specified plane. 4943 */ 4944int drm_format_plane_cpp(uint32_t format, int plane) 4945{ 4946 unsigned int depth; 4947 int bpp; 4948 4949 if (plane >= drm_format_num_planes(format)) 4950 return 0; 4951 4952 switch (format) { 4953 case DRM_FORMAT_YUYV: 4954 case DRM_FORMAT_YVYU: 4955 case DRM_FORMAT_UYVY: 4956 case DRM_FORMAT_VYUY: 4957 return 2; 4958 case DRM_FORMAT_NV12: 4959 case DRM_FORMAT_NV21: 4960 case DRM_FORMAT_NV16: 4961 case DRM_FORMAT_NV61: 4962 case DRM_FORMAT_NV24: 4963 case DRM_FORMAT_NV42: 4964 return plane ? 2 : 1; 4965 case DRM_FORMAT_YUV410: 4966 case DRM_FORMAT_YVU410: 4967 case DRM_FORMAT_YUV411: 4968 case DRM_FORMAT_YVU411: 4969 case DRM_FORMAT_YUV420: 4970 case DRM_FORMAT_YVU420: 4971 case DRM_FORMAT_YUV422: 4972 case DRM_FORMAT_YVU422: 4973 case DRM_FORMAT_YUV444: 4974 case DRM_FORMAT_YVU444: 4975 return 1; 4976 default: 4977 drm_fb_get_bpp_depth(format, &depth, &bpp); 4978 return bpp >> 3; 4979 } 4980} 4981EXPORT_SYMBOL(drm_format_plane_cpp); 4982 4983/** 4984 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 4985 * @format: pixel format (DRM_FORMAT_*) 4986 * 4987 * Returns: 4988 * The horizontal chroma subsampling factor for the 4989 * specified pixel format. 4990 */ 4991int drm_format_horz_chroma_subsampling(uint32_t format) 4992{ 4993 switch (format) { 4994 case DRM_FORMAT_YUV411: 4995 case DRM_FORMAT_YVU411: 4996 case DRM_FORMAT_YUV410: 4997 case DRM_FORMAT_YVU410: 4998 return 4; 4999 case DRM_FORMAT_YUYV: 5000 case DRM_FORMAT_YVYU: 5001 case DRM_FORMAT_UYVY: 5002 case DRM_FORMAT_VYUY: 5003 case DRM_FORMAT_NV12: 5004 case DRM_FORMAT_NV21: 5005 case DRM_FORMAT_NV16: 5006 case DRM_FORMAT_NV61: 5007 case DRM_FORMAT_YUV422: 5008 case DRM_FORMAT_YVU422: 5009 case DRM_FORMAT_YUV420: 5010 case DRM_FORMAT_YVU420: 5011 return 2; 5012 default: 5013 return 1; 5014 } 5015} 5016EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5017 5018/** 5019 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5020 * @format: pixel format (DRM_FORMAT_*) 5021 * 5022 * Returns: 5023 * The vertical chroma subsampling factor for the 5024 * specified pixel format. 5025 */ 5026int drm_format_vert_chroma_subsampling(uint32_t format) 5027{ 5028 switch (format) { 5029 case DRM_FORMAT_YUV410: 5030 case DRM_FORMAT_YVU410: 5031 return 4; 5032 case DRM_FORMAT_YUV420: 5033 case DRM_FORMAT_YVU420: 5034 case DRM_FORMAT_NV12: 5035 case DRM_FORMAT_NV21: 5036 return 2; 5037 default: 5038 return 1; 5039 } 5040} 5041EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5042 5043/** 5044 * drm_rotation_simplify() - Try to simplify the rotation 5045 * @rotation: Rotation to be simplified 5046 * @supported_rotations: Supported rotations 5047 * 5048 * Attempt to simplify the rotation to a form that is supported. 5049 * Eg. if the hardware supports everything except DRM_REFLECT_X 5050 * one could call this function like this: 5051 * 5052 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5053 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5054 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5055 * 5056 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5057 * transforms the hardware supports, this function may not 5058 * be able to produce a supported transform, so the caller should 5059 * check the result afterwards. 5060 */ 5061unsigned int drm_rotation_simplify(unsigned int rotation, 5062 unsigned int supported_rotations) 5063{ 5064 if (rotation & ~supported_rotations) { 5065 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5066 rotation = (rotation & ~0xf) | BIT((ffs(rotation & 0xf) + 1) % 4); 5067 } 5068 5069 return rotation; 5070} 5071EXPORT_SYMBOL(drm_rotation_simplify); 5072 5073/** 5074 * drm_mode_config_init - initialize DRM mode_configuration structure 5075 * @dev: DRM device 5076 * 5077 * Initialize @dev's mode_config structure, used for tracking the graphics 5078 * configuration of @dev. 5079 * 5080 * Since this initializes the modeset locks, no locking is possible. Which is no 5081 * problem, since this should happen single threaded at init time. It is the 5082 * driver's problem to ensure this guarantee. 5083 * 5084 */ 5085void drm_mode_config_init(struct drm_device *dev) 5086{ 5087 mutex_init(&dev->mode_config.mutex); 5088 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5089 mutex_init(&dev->mode_config.idr_mutex); 5090 mutex_init(&dev->mode_config.fb_lock); 5091 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5092 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5093 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5094 INIT_LIST_HEAD(&dev->mode_config.bridge_list); 5095 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5096 INIT_LIST_HEAD(&dev->mode_config.property_list); 5097 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5098 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5099 idr_init(&dev->mode_config.crtc_idr); 5100 5101 drm_modeset_lock_all(dev); 5102 drm_mode_create_standard_connector_properties(dev); 5103 drm_mode_create_standard_plane_properties(dev); 5104 drm_modeset_unlock_all(dev); 5105 5106 /* Just to be sure */ 5107 dev->mode_config.num_fb = 0; 5108 dev->mode_config.num_connector = 0; 5109 dev->mode_config.num_crtc = 0; 5110 dev->mode_config.num_encoder = 0; 5111 dev->mode_config.num_overlay_plane = 0; 5112 dev->mode_config.num_total_plane = 0; 5113} 5114EXPORT_SYMBOL(drm_mode_config_init); 5115 5116/** 5117 * drm_mode_config_cleanup - free up DRM mode_config info 5118 * @dev: DRM device 5119 * 5120 * Free up all the connectors and CRTCs associated with this DRM device, then 5121 * free up the framebuffers and associated buffer objects. 5122 * 5123 * Note that since this /should/ happen single-threaded at driver/device 5124 * teardown time, no locking is required. It's the driver's job to ensure that 5125 * this guarantee actually holds true. 5126 * 5127 * FIXME: cleanup any dangling user buffer objects too 5128 */ 5129void drm_mode_config_cleanup(struct drm_device *dev) 5130{ 5131 struct drm_connector *connector, *ot; 5132 struct drm_crtc *crtc, *ct; 5133 struct drm_encoder *encoder, *enct; 5134 struct drm_bridge *bridge, *brt; 5135 struct drm_framebuffer *fb, *fbt; 5136 struct drm_property *property, *pt; 5137 struct drm_property_blob *blob, *bt; 5138 struct drm_plane *plane, *plt; 5139 5140 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5141 head) { 5142 encoder->funcs->destroy(encoder); 5143 } 5144 5145 list_for_each_entry_safe(bridge, brt, 5146 &dev->mode_config.bridge_list, head) { 5147 bridge->funcs->destroy(bridge); 5148 } 5149 5150 list_for_each_entry_safe(connector, ot, 5151 &dev->mode_config.connector_list, head) { 5152 connector->funcs->destroy(connector); 5153 } 5154 5155 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5156 head) { 5157 drm_property_destroy(dev, property); 5158 } 5159 5160 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5161 head) { 5162 drm_property_destroy_blob(dev, blob); 5163 } 5164 5165 /* 5166 * Single-threaded teardown context, so it's not required to grab the 5167 * fb_lock to protect against concurrent fb_list access. Contrary, it 5168 * would actually deadlock with the drm_framebuffer_cleanup function. 5169 * 5170 * Also, if there are any framebuffers left, that's a driver leak now, 5171 * so politely WARN about this. 5172 */ 5173 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5174 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5175 drm_framebuffer_remove(fb); 5176 } 5177 5178 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5179 head) { 5180 plane->funcs->destroy(plane); 5181 } 5182 5183 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5184 crtc->funcs->destroy(crtc); 5185 } 5186 5187 idr_destroy(&dev->mode_config.crtc_idr); 5188 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5189} 5190EXPORT_SYMBOL(drm_mode_config_cleanup); 5191 5192struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5193 unsigned int supported_rotations) 5194{ 5195 static const struct drm_prop_enum_list props[] = { 5196 { DRM_ROTATE_0, "rotate-0" }, 5197 { DRM_ROTATE_90, "rotate-90" }, 5198 { DRM_ROTATE_180, "rotate-180" }, 5199 { DRM_ROTATE_270, "rotate-270" }, 5200 { DRM_REFLECT_X, "reflect-x" }, 5201 { DRM_REFLECT_Y, "reflect-y" }, 5202 }; 5203 5204 return drm_property_create_bitmask(dev, 0, "rotation", 5205 props, ARRAY_SIZE(props), 5206 supported_rotations); 5207} 5208EXPORT_SYMBOL(drm_mode_create_rotation_property); 5209