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/export.h> 35 #include <drm/drmP.h> 36 #include <drm/drm_crtc.h> 37 #include <drm/drm_edid.h> 38 #include <uapi_drm/drm_fourcc.h> 39 #include <linux/slab.h> 40 #include <drm/drm_modeset_lock.h> 41 #include <drm/drm_atomic.h> 42 43 #include "drm_crtc_internal.h" 44 #include "drm_internal.h" 45 46 static struct drm_framebuffer * 47 internal_framebuffer_create(struct drm_device *dev, 48 const struct drm_mode_fb_cmd2 *r, 49 struct drm_file *file_priv); 50 51 /* Avoid boilerplate. I'm tired of typing. */ 52 #define DRM_ENUM_NAME_FN(fnname, list) \ 53 const char *fnname(int val) \ 54 { \ 55 int i; \ 56 for (i = 0; i < ARRAY_SIZE(list); i++) { \ 57 if (list[i].type == val) \ 58 return list[i].name; \ 59 } \ 60 return "(unknown)"; \ 61 } 62 63 /* 64 * Global properties 65 */ 66 static const struct drm_prop_enum_list drm_dpms_enum_list[] = { 67 { DRM_MODE_DPMS_ON, "On" }, 68 { DRM_MODE_DPMS_STANDBY, "Standby" }, 69 { DRM_MODE_DPMS_SUSPEND, "Suspend" }, 70 { DRM_MODE_DPMS_OFF, "Off" } 71 }; 72 73 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) 74 75 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { 76 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 77 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 78 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 79 }; 80 81 /* 82 * Optional properties 83 */ 84 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { 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 91 static 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 */ 100 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { 101 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 102 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 103 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 104 }; 105 106 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) 107 108 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { 109 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 110 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 111 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 112 }; 113 114 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, 115 drm_dvi_i_subconnector_enum_list) 116 117 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { 118 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 119 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 120 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 121 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 122 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 123 }; 124 125 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) 126 127 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { 128 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 129 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 130 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 131 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 132 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 133 }; 134 135 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, 136 drm_tv_subconnector_enum_list) 137 138 static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = { 139 { DRM_MODE_DIRTY_OFF, "Off" }, 140 { DRM_MODE_DIRTY_ON, "On" }, 141 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" }, 142 }; 143 144 struct drm_conn_prop_enum_list { 145 int type; 146 const char *name; 147 int count; 148 }; 149 150 /* 151 * Connector and encoder types. 152 */ 153 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { 154 { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, 155 { DRM_MODE_CONNECTOR_VGA, "VGA" }, 156 { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, 157 { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, 158 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, 159 { DRM_MODE_CONNECTOR_Composite, "Composite" }, 160 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, 161 { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, 162 { DRM_MODE_CONNECTOR_Component, "Component" }, 163 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, 164 { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, 165 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, 166 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, 167 { DRM_MODE_CONNECTOR_TV, "TV" }, 168 { DRM_MODE_CONNECTOR_eDP, "eDP" }, 169 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, 170 { DRM_MODE_CONNECTOR_DSI, "DSI" }, 171 }; 172 173 static const struct drm_prop_enum_list drm_encoder_enum_list[] = { 174 { DRM_MODE_ENCODER_NONE, "None" }, 175 { DRM_MODE_ENCODER_DAC, "DAC" }, 176 { DRM_MODE_ENCODER_TMDS, "TMDS" }, 177 { DRM_MODE_ENCODER_LVDS, "LVDS" }, 178 { DRM_MODE_ENCODER_TVDAC, "TV" }, 179 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" }, 180 { DRM_MODE_ENCODER_DSI, "DSI" }, 181 { DRM_MODE_ENCODER_DPMST, "DP MST" }, 182 }; 183 184 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { 185 { SubPixelUnknown, "Unknown" }, 186 { SubPixelHorizontalRGB, "Horizontal RGB" }, 187 { SubPixelHorizontalBGR, "Horizontal BGR" }, 188 { SubPixelVerticalRGB, "Vertical RGB" }, 189 { SubPixelVerticalBGR, "Vertical BGR" }, 190 { SubPixelNone, "None" }, 191 }; 192 193 void drm_connector_ida_init(void) 194 { 195 #if 0 196 int i; 197 198 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 199 ida_init(&drm_connector_enum_list[i].ida); 200 #endif 201 } 202 203 void drm_connector_ida_destroy(void) 204 { 205 #if 0 206 int i; 207 208 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 209 ida_destroy(&drm_connector_enum_list[i].ida); 210 #endif 211 } 212 213 /** 214 * drm_get_connector_status_name - return a string for connector status 215 * @status: connector status to compute name of 216 * 217 * In contrast to the other drm_get_*_name functions this one here returns a 218 * const pointer and hence is threadsafe. 219 */ 220 const char *drm_get_connector_status_name(enum drm_connector_status status) 221 { 222 if (status == connector_status_connected) 223 return "connected"; 224 else if (status == connector_status_disconnected) 225 return "disconnected"; 226 else 227 return "unknown"; 228 } 229 EXPORT_SYMBOL(drm_get_connector_status_name); 230 231 /** 232 * drm_get_subpixel_order_name - return a string for a given subpixel enum 233 * @order: enum of subpixel_order 234 * 235 * Note you could abuse this and return something out of bounds, but that 236 * would be a caller error. No unscrubbed user data should make it here. 237 */ 238 const char *drm_get_subpixel_order_name(enum subpixel_order order) 239 { 240 return drm_subpixel_enum_list[order].name; 241 } 242 EXPORT_SYMBOL(drm_get_subpixel_order_name); 243 244 static char printable_char(int c) 245 { 246 return isascii(c) && isprint(c) ? c : '?'; 247 } 248 249 /** 250 * drm_get_format_name - return a string for drm fourcc format 251 * @format: format to compute name of 252 * 253 * Note that the buffer used by this function is globally shared and owned by 254 * the function itself. 255 * 256 * FIXME: This isn't really multithreading safe. 257 */ 258 const char *drm_get_format_name(uint32_t format) 259 { 260 static char buf[32]; 261 262 ksnprintf(buf, sizeof(buf), 263 "%c%c%c%c %s-endian (0x%08x)", 264 printable_char(format & 0xff), 265 printable_char((format >> 8) & 0xff), 266 printable_char((format >> 16) & 0xff), 267 printable_char((format >> 24) & 0x7f), 268 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", 269 format); 270 271 return buf; 272 } 273 EXPORT_SYMBOL(drm_get_format_name); 274 275 /* 276 * Internal function to assign a slot in the object idr and optionally 277 * register the object into the idr. 278 */ 279 static int drm_mode_object_get_reg(struct drm_device *dev, 280 struct drm_mode_object *obj, 281 uint32_t obj_type, 282 bool register_obj) 283 { 284 int ret; 285 286 mutex_lock(&dev->mode_config.idr_mutex); 287 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); 288 if (ret >= 0) { 289 /* 290 * Set up the object linking under the protection of the idr 291 * lock so that other users can't see inconsistent state. 292 */ 293 obj->id = ret; 294 obj->type = obj_type; 295 } 296 mutex_unlock(&dev->mode_config.idr_mutex); 297 298 return ret < 0 ? ret : 0; 299 } 300 301 /** 302 * drm_mode_object_get - allocate a new modeset identifier 303 * @dev: DRM device 304 * @obj: object pointer, used to generate unique ID 305 * @obj_type: object type 306 * 307 * Create a unique identifier based on @ptr in @dev's identifier space. Used 308 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix 309 * modeset identifiers are _not_ reference counted. Hence don't use this for 310 * reference counted modeset objects like framebuffers. 311 * 312 * Returns: 313 * Zero on success, error code on failure. 314 */ 315 int drm_mode_object_get(struct drm_device *dev, 316 struct drm_mode_object *obj, uint32_t obj_type) 317 { 318 return drm_mode_object_get_reg(dev, obj, obj_type, true); 319 } 320 321 static void drm_mode_object_register(struct drm_device *dev, 322 struct drm_mode_object *obj) 323 { 324 mutex_lock(&dev->mode_config.idr_mutex); 325 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); 326 mutex_unlock(&dev->mode_config.idr_mutex); 327 } 328 329 /** 330 * drm_mode_object_put - free a modeset identifer 331 * @dev: DRM device 332 * @object: object to free 333 * 334 * Free @id from @dev's unique identifier pool. Note that despite the _get 335 * postfix modeset identifiers are _not_ reference counted. Hence don't use this 336 * for reference counted modeset objects like framebuffers. 337 */ 338 void drm_mode_object_put(struct drm_device *dev, 339 struct drm_mode_object *object) 340 { 341 mutex_lock(&dev->mode_config.idr_mutex); 342 idr_remove(&dev->mode_config.crtc_idr, object->id); 343 mutex_unlock(&dev->mode_config.idr_mutex); 344 } 345 346 static struct drm_mode_object *_object_find(struct drm_device *dev, 347 uint32_t id, uint32_t type) 348 { 349 struct drm_mode_object *obj = NULL; 350 351 mutex_lock(&dev->mode_config.idr_mutex); 352 obj = idr_find(&dev->mode_config.crtc_idr, id); 353 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) 354 obj = NULL; 355 if (obj && obj->id != id) 356 obj = NULL; 357 /* don't leak out unref'd fb's */ 358 if (obj && 359 (obj->type == DRM_MODE_OBJECT_FB || 360 obj->type == DRM_MODE_OBJECT_BLOB)) 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 */ 378 struct 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 || type == DRM_MODE_OBJECT_BLOB); 386 obj = _object_find(dev, id, type); 387 return obj; 388 } 389 EXPORT_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 */ 409 int 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); 426 out: 427 mutex_unlock(&dev->mode_config.fb_lock); 428 429 return ret; 430 } 431 EXPORT_SYMBOL(drm_framebuffer_init); 432 433 /* dev->mode_config.fb_lock must be held! */ 434 static void __drm_framebuffer_unregister(struct drm_device *dev, 435 struct drm_framebuffer *fb) 436 { 437 drm_mode_object_put(dev, &fb->base); 438 439 fb->base.id = 0; 440 } 441 442 static void drm_framebuffer_free(struct kref *kref) 443 { 444 struct drm_framebuffer *fb = 445 container_of(kref, struct drm_framebuffer, refcount); 446 struct drm_device *dev = fb->dev; 447 448 /* 449 * The lookup idr holds a weak reference, which has not necessarily been 450 * removed at this point. Check for that. 451 */ 452 mutex_lock(&dev->mode_config.fb_lock); 453 if (fb->base.id) { 454 /* Mark fb as reaped and drop idr ref. */ 455 __drm_framebuffer_unregister(dev, fb); 456 } 457 mutex_unlock(&dev->mode_config.fb_lock); 458 459 fb->funcs->destroy(fb); 460 } 461 462 static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev, 463 uint32_t id) 464 { 465 struct drm_mode_object *obj = NULL; 466 struct drm_framebuffer *fb; 467 468 mutex_lock(&dev->mode_config.idr_mutex); 469 obj = idr_find(&dev->mode_config.crtc_idr, id); 470 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id)) 471 fb = NULL; 472 else 473 fb = obj_to_fb(obj); 474 mutex_unlock(&dev->mode_config.idr_mutex); 475 476 return fb; 477 } 478 479 /** 480 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference 481 * @dev: drm device 482 * @id: id of the fb object 483 * 484 * If successful, this grabs an additional reference to the framebuffer - 485 * callers need to make sure to eventually unreference the returned framebuffer 486 * again, using @drm_framebuffer_unreference. 487 */ 488 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, 489 uint32_t id) 490 { 491 struct drm_framebuffer *fb; 492 493 mutex_lock(&dev->mode_config.fb_lock); 494 fb = __drm_framebuffer_lookup(dev, id); 495 if (fb) { 496 if (!kref_get_unless_zero(&fb->refcount)) 497 fb = NULL; 498 } 499 mutex_unlock(&dev->mode_config.fb_lock); 500 501 return fb; 502 } 503 EXPORT_SYMBOL(drm_framebuffer_lookup); 504 505 /** 506 * drm_framebuffer_unreference - unref a framebuffer 507 * @fb: framebuffer to unref 508 * 509 * This functions decrements the fb's refcount and frees it if it drops to zero. 510 */ 511 void drm_framebuffer_unreference(struct drm_framebuffer *fb) 512 { 513 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 514 kref_put(&fb->refcount, drm_framebuffer_free); 515 } 516 EXPORT_SYMBOL(drm_framebuffer_unreference); 517 518 /** 519 * drm_framebuffer_reference - incr the fb refcnt 520 * @fb: framebuffer 521 * 522 * This functions increments the fb's refcount. 523 */ 524 void drm_framebuffer_reference(struct drm_framebuffer *fb) 525 { 526 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 527 kref_get(&fb->refcount); 528 } 529 EXPORT_SYMBOL(drm_framebuffer_reference); 530 531 /** 532 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr 533 * @fb: fb to unregister 534 * 535 * Drivers need to call this when cleaning up driver-private framebuffers, e.g. 536 * those used for fbdev. Note that the caller must hold a reference of it's own, 537 * i.e. the object may not be destroyed through this call (since it'll lead to a 538 * locking inversion). 539 */ 540 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) 541 { 542 struct drm_device *dev; 543 544 if (!fb) 545 return; 546 547 dev = fb->dev; 548 549 mutex_lock(&dev->mode_config.fb_lock); 550 /* Mark fb as reaped and drop idr ref. */ 551 __drm_framebuffer_unregister(dev, fb); 552 mutex_unlock(&dev->mode_config.fb_lock); 553 } 554 EXPORT_SYMBOL(drm_framebuffer_unregister_private); 555 556 /** 557 * drm_framebuffer_cleanup - remove a framebuffer object 558 * @fb: framebuffer to remove 559 * 560 * Cleanup framebuffer. This function is intended to be used from the drivers 561 * ->destroy callback. It can also be used to clean up driver private 562 * framebuffers embedded into a larger structure. 563 * 564 * Note that this function does not remove the fb from active usuage - if it is 565 * still used anywhere, hilarity can ensue since userspace could call getfb on 566 * the id and get back -EINVAL. Obviously no concern at driver unload time. 567 * 568 * Also, the framebuffer will not be removed from the lookup idr - for 569 * user-created framebuffers this will happen in in the rmfb ioctl. For 570 * driver-private objects (e.g. for fbdev) drivers need to explicitly call 571 * drm_framebuffer_unregister_private. 572 */ 573 void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 574 { 575 struct drm_device *dev = fb->dev; 576 577 mutex_lock(&dev->mode_config.fb_lock); 578 list_del(&fb->head); 579 dev->mode_config.num_fb--; 580 mutex_unlock(&dev->mode_config.fb_lock); 581 } 582 EXPORT_SYMBOL(drm_framebuffer_cleanup); 583 584 /** 585 * drm_framebuffer_remove - remove and unreference a framebuffer object 586 * @fb: framebuffer to remove 587 * 588 * Scans all the CRTCs and planes in @dev's mode_config. If they're 589 * using @fb, removes it, setting it to NULL. Then drops the reference to the 590 * passed-in framebuffer. Might take the modeset locks. 591 * 592 * Note that this function optimizes the cleanup away if the caller holds the 593 * last reference to the framebuffer. It is also guaranteed to not take the 594 * modeset locks in this case. 595 */ 596 void drm_framebuffer_remove(struct drm_framebuffer *fb) 597 { 598 struct drm_device *dev; 599 struct drm_crtc *crtc; 600 struct drm_plane *plane; 601 struct drm_mode_set set; 602 int ret; 603 604 if (!fb) 605 return; 606 607 dev = fb->dev; 608 609 WARN_ON(!list_empty(&fb->filp_head)); 610 611 /* 612 * drm ABI mandates that we remove any deleted framebuffers from active 613 * useage. But since most sane clients only remove framebuffers they no 614 * longer need, try to optimize this away. 615 * 616 * Since we're holding a reference ourselves, observing a refcount of 1 617 * means that we're the last holder and can skip it. Also, the refcount 618 * can never increase from 1 again, so we don't need any barriers or 619 * locks. 620 * 621 * Note that userspace could try to race with use and instate a new 622 * usage _after_ we've cleared all current ones. End result will be an 623 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot 624 * in this manner. 625 */ 626 if (atomic_read(&fb->refcount.refcount) > 1) { 627 drm_modeset_lock_all(dev); 628 /* remove from any CRTC */ 629 drm_for_each_crtc(crtc, dev) { 630 if (crtc->primary->fb == fb) { 631 /* should turn off the crtc */ 632 memset(&set, 0, sizeof(struct drm_mode_set)); 633 set.crtc = crtc; 634 set.fb = NULL; 635 ret = drm_mode_set_config_internal(&set); 636 if (ret) 637 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); 638 } 639 } 640 641 drm_for_each_plane(plane, dev) { 642 if (plane->fb == fb) 643 drm_plane_force_disable(plane); 644 } 645 drm_modeset_unlock_all(dev); 646 } 647 648 drm_framebuffer_unreference(fb); 649 } 650 EXPORT_SYMBOL(drm_framebuffer_remove); 651 652 DEFINE_WW_CLASS(crtc_ww_class); 653 654 static unsigned int drm_num_crtcs(struct drm_device *dev) 655 { 656 unsigned int num = 0; 657 struct drm_crtc *tmp; 658 659 drm_for_each_crtc(tmp, dev) { 660 num++; 661 } 662 663 return num; 664 } 665 666 /** 667 * drm_crtc_init_with_planes - Initialise a new CRTC object with 668 * specified primary and cursor planes. 669 * @dev: DRM device 670 * @crtc: CRTC object to init 671 * @primary: Primary plane for CRTC 672 * @cursor: Cursor plane for CRTC 673 * @funcs: callbacks for the new CRTC 674 * @name: printf style format string for the CRTC name, or NULL for default name 675 * 676 * Inits a new object created as base part of a driver crtc object. 677 * 678 * Returns: 679 * Zero on success, error code on failure. 680 */ 681 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 682 struct drm_plane *primary, 683 struct drm_plane *cursor, 684 const struct drm_crtc_funcs *funcs, 685 const char *name, ...) 686 { 687 struct drm_mode_config *config = &dev->mode_config; 688 int ret; 689 690 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); 691 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); 692 693 crtc->dev = dev; 694 crtc->funcs = funcs; 695 696 drm_modeset_lock_init(&crtc->mutex); 697 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 698 if (ret) 699 return ret; 700 701 if (name) { 702 __va_list ap; 703 704 __va_start(ap, name); 705 crtc->name = kvasprintf(GFP_KERNEL, name, ap); 706 __va_end(ap); 707 } else { 708 crtc->name = kasprintf(GFP_KERNEL, "crtc-%d", 709 drm_num_crtcs(dev)); 710 } 711 if (!crtc->name) { 712 drm_mode_object_put(dev, &crtc->base); 713 return -ENOMEM; 714 } 715 716 crtc->base.properties = &crtc->properties; 717 718 list_add_tail(&crtc->head, &config->crtc_list); 719 config->num_crtc++; 720 721 crtc->primary = primary; 722 crtc->cursor = cursor; 723 if (primary) 724 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 725 if (cursor) 726 cursor->possible_crtcs = 1 << drm_crtc_index(crtc); 727 728 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 729 drm_object_attach_property(&crtc->base, config->prop_active, 0); 730 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); 731 } 732 733 return 0; 734 } 735 EXPORT_SYMBOL(drm_crtc_init_with_planes); 736 737 /** 738 * drm_crtc_cleanup - Clean up the core crtc usage 739 * @crtc: CRTC to cleanup 740 * 741 * This function cleans up @crtc and removes it from the DRM mode setting 742 * core. Note that the function does *not* free the crtc structure itself, 743 * this is the responsibility of the caller. 744 */ 745 void drm_crtc_cleanup(struct drm_crtc *crtc) 746 { 747 struct drm_device *dev = crtc->dev; 748 749 kfree(crtc->gamma_store); 750 crtc->gamma_store = NULL; 751 752 drm_modeset_lock_fini(&crtc->mutex); 753 754 drm_mode_object_put(dev, &crtc->base); 755 list_del(&crtc->head); 756 dev->mode_config.num_crtc--; 757 758 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); 759 if (crtc->state && crtc->funcs->atomic_destroy_state) 760 crtc->funcs->atomic_destroy_state(crtc, crtc->state); 761 762 kfree(crtc->name); 763 764 memset(crtc, 0, sizeof(*crtc)); 765 } 766 EXPORT_SYMBOL(drm_crtc_cleanup); 767 768 /** 769 * drm_crtc_index - find the index of a registered CRTC 770 * @crtc: CRTC to find index for 771 * 772 * Given a registered CRTC, return the index of that CRTC within a DRM 773 * device's list of CRTCs. 774 */ 775 unsigned int drm_crtc_index(struct drm_crtc *crtc) 776 { 777 unsigned int index = 0; 778 struct drm_crtc *tmp; 779 780 drm_for_each_crtc(tmp, crtc->dev) { 781 if (tmp == crtc) 782 return index; 783 784 index++; 785 } 786 787 BUG(); 788 } 789 EXPORT_SYMBOL(drm_crtc_index); 790 791 /* 792 * drm_mode_remove - remove and free a mode 793 * @connector: connector list to modify 794 * @mode: mode to remove 795 * 796 * Remove @mode from @connector's mode list, then free it. 797 */ 798 static void drm_mode_remove(struct drm_connector *connector, 799 struct drm_display_mode *mode) 800 { 801 list_del(&mode->head); 802 drm_mode_destroy(connector->dev, mode); 803 } 804 805 /** 806 * drm_display_info_set_bus_formats - set the supported bus formats 807 * @info: display info to store bus formats in 808 * @fmts: array containing the supported bus formats 809 * @nfmts: the number of entries in the fmts array 810 * 811 * Store the supported bus formats in display info structure. 812 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for 813 * a full list of available formats. 814 */ 815 int drm_display_info_set_bus_formats(struct drm_display_info *info, 816 const u32 *formats, 817 unsigned int num_formats) 818 { 819 u32 *fmts = NULL; 820 821 if (!formats && num_formats) 822 return -EINVAL; 823 824 if (formats && num_formats) { 825 fmts = kmemdup(formats, sizeof(*formats) * num_formats, 826 GFP_KERNEL); 827 if (!fmts) 828 return -ENOMEM; 829 } 830 831 kfree(info->bus_formats); 832 info->bus_formats = fmts; 833 info->num_bus_formats = num_formats; 834 835 return 0; 836 } 837 EXPORT_SYMBOL(drm_display_info_set_bus_formats); 838 839 /** 840 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 841 * @connector: connector to quwery 842 * 843 * The kernel supports per-connector configration of its consoles through 844 * use of the video= parameter. This function parses that option and 845 * extracts the user's specified mode (or enable/disable status) for a 846 * particular connector. This is typically only used during the early fbdev 847 * setup. 848 */ 849 static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 850 { 851 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 852 char *option = NULL; 853 854 if (fb_get_options(connector->name, &option)) 855 return; 856 857 if (!drm_mode_parse_command_line_for_connector(option, 858 connector, 859 mode)) 860 return; 861 862 if (mode->force) { 863 const char *s; 864 865 switch (mode->force) { 866 case DRM_FORCE_OFF: 867 s = "OFF"; 868 break; 869 case DRM_FORCE_ON_DIGITAL: 870 s = "ON - dig"; 871 break; 872 default: 873 case DRM_FORCE_ON: 874 s = "ON"; 875 break; 876 } 877 878 DRM_INFO("forcing %s connector %s\n", connector->name, s); 879 connector->force = mode->force; 880 } 881 882 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 883 connector->name, 884 mode->xres, mode->yres, 885 mode->refresh_specified ? mode->refresh : 60, 886 mode->rb ? " reduced blanking" : "", 887 mode->margins ? " with margins" : "", 888 mode->interlace ? " interlaced" : ""); 889 } 890 891 /** 892 * drm_connector_init - Init a preallocated connector 893 * @dev: DRM device 894 * @connector: the connector to init 895 * @funcs: callbacks for this connector 896 * @connector_type: user visible type of the connector 897 * 898 * Initialises a preallocated connector. Connectors should be 899 * subclassed as part of driver connector objects. 900 * 901 * Returns: 902 * Zero on success, error code on failure. 903 */ 904 int drm_connector_init(struct drm_device *dev, 905 struct drm_connector *connector, 906 const struct drm_connector_funcs *funcs, 907 int connector_type) 908 { 909 struct drm_mode_config *config = &dev->mode_config; 910 int ret; 911 912 drm_modeset_lock_all(dev); 913 914 ret = drm_mode_object_get(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR); 915 if (ret) 916 goto out_unlock; 917 918 connector->base.properties = &connector->properties; 919 connector->dev = dev; 920 connector->funcs = funcs; 921 connector->connector_type = connector_type; 922 connector->connector_type_id = 923 ++drm_connector_enum_list[connector_type].count; /* TODO */ 924 if (connector->connector_type_id < 0) { 925 ret = connector->connector_type_id; 926 goto out_put; 927 } 928 connector->name = 929 kasprintf(GFP_KERNEL, "%s-%d", 930 drm_connector_enum_list[connector_type].name, 931 connector->connector_type_id); 932 if (!connector->name) { 933 ret = -ENOMEM; 934 goto out_put; 935 } 936 937 INIT_LIST_HEAD(&connector->probed_modes); 938 INIT_LIST_HEAD(&connector->modes); 939 connector->edid_blob_ptr = NULL; 940 connector->status = connector_status_unknown; 941 942 drm_connector_get_cmdline_mode(connector); 943 944 /* We should add connectors at the end to avoid upsetting the connector 945 * index too much. */ 946 list_add_tail(&connector->head, &config->connector_list); 947 config->num_connector++; 948 949 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 950 drm_object_attach_property(&connector->base, 951 config->edid_property, 952 0); 953 954 drm_object_attach_property(&connector->base, 955 config->dpms_property, 0); 956 957 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 958 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); 959 } 960 961 connector->debugfs_entry = NULL; 962 963 out_put: 964 if (ret) 965 drm_mode_object_put(dev, &connector->base); 966 967 out_unlock: 968 drm_modeset_unlock_all(dev); 969 970 return ret; 971 } 972 EXPORT_SYMBOL(drm_connector_init); 973 974 /** 975 * drm_connector_cleanup - cleans up an initialised connector 976 * @connector: connector to cleanup 977 * 978 * Cleans up the connector but doesn't free the object. 979 */ 980 void drm_connector_cleanup(struct drm_connector *connector) 981 { 982 struct drm_device *dev = connector->dev; 983 struct drm_display_mode *mode, *t; 984 985 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 986 drm_mode_remove(connector, mode); 987 988 list_for_each_entry_safe(mode, t, &connector->modes, head) 989 drm_mode_remove(connector, mode); 990 991 kfree(connector->display_info.bus_formats); 992 drm_mode_object_put(dev, &connector->base); 993 kfree(connector->name); 994 connector->name = NULL; 995 list_del(&connector->head); 996 dev->mode_config.num_connector--; 997 998 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 999 if (connector->state && connector->funcs->atomic_destroy_state) 1000 connector->funcs->atomic_destroy_state(connector, 1001 connector->state); 1002 1003 memset(connector, 0, sizeof(*connector)); 1004 } 1005 EXPORT_SYMBOL(drm_connector_cleanup); 1006 1007 /** 1008 * drm_connector_index - find the index of a registered connector 1009 * @connector: connector to find index for 1010 * 1011 * Given a registered connector, return the index of that connector within a DRM 1012 * device's list of connectors. 1013 */ 1014 unsigned int drm_connector_index(struct drm_connector *connector) 1015 { 1016 unsigned int index = 0; 1017 struct drm_connector *tmp; 1018 struct drm_mode_config *config = &connector->dev->mode_config; 1019 1020 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 1021 1022 drm_for_each_connector(tmp, connector->dev) { 1023 if (tmp == connector) 1024 return index; 1025 1026 index++; 1027 } 1028 1029 BUG(); 1030 } 1031 EXPORT_SYMBOL(drm_connector_index); 1032 1033 /** 1034 * drm_connector_register - register a connector 1035 * @connector: the connector to register 1036 * 1037 * Register userspace interfaces for a connector 1038 * 1039 * Returns: 1040 * Zero on success, error code on failure. 1041 */ 1042 int drm_connector_register(struct drm_connector *connector) 1043 { 1044 int ret; 1045 1046 drm_mode_object_register(connector->dev, &connector->base); 1047 1048 ret = drm_sysfs_connector_add(connector); 1049 if (ret) 1050 return ret; 1051 1052 ret = drm_debugfs_connector_add(connector); 1053 if (ret) { 1054 drm_sysfs_connector_remove(connector); 1055 return ret; 1056 } 1057 1058 return 0; 1059 } 1060 EXPORT_SYMBOL(drm_connector_register); 1061 1062 /** 1063 * drm_connector_unregister - unregister a connector 1064 * @connector: the connector to unregister 1065 * 1066 * Unregister userspace interfaces for a connector 1067 */ 1068 void drm_connector_unregister(struct drm_connector *connector) 1069 { 1070 drm_sysfs_connector_remove(connector); 1071 #if 0 1072 drm_debugfs_connector_remove(connector); 1073 #endif 1074 } 1075 EXPORT_SYMBOL(drm_connector_unregister); 1076 1077 1078 /** 1079 * drm_connector_unplug_all - unregister connector userspace interfaces 1080 * @dev: drm device 1081 * 1082 * This function unregisters all connector userspace interfaces in sysfs. Should 1083 * be call when the device is disconnected, e.g. from an usb driver's 1084 * ->disconnect callback. 1085 */ 1086 void drm_connector_unplug_all(struct drm_device *dev) 1087 { 1088 struct drm_connector *connector; 1089 1090 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */ 1091 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1092 drm_connector_unregister(connector); 1093 1094 } 1095 EXPORT_SYMBOL(drm_connector_unplug_all); 1096 1097 /** 1098 * drm_encoder_init - Init a preallocated encoder 1099 * @dev: drm device 1100 * @encoder: the encoder to init 1101 * @funcs: callbacks for this encoder 1102 * @encoder_type: user visible type of the encoder 1103 * @name: printf style format string for the encoder name, or NULL for default name 1104 * 1105 * Initialises a preallocated encoder. Encoder should be 1106 * subclassed as part of driver encoder objects. 1107 * 1108 * Returns: 1109 * Zero on success, error code on failure. 1110 */ 1111 int drm_encoder_init(struct drm_device *dev, 1112 struct drm_encoder *encoder, 1113 const struct drm_encoder_funcs *funcs, 1114 int encoder_type, const char *name, ...) 1115 { 1116 int ret; 1117 1118 drm_modeset_lock_all(dev); 1119 1120 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1121 if (ret) 1122 goto out_unlock; 1123 1124 encoder->dev = dev; 1125 encoder->encoder_type = encoder_type; 1126 encoder->funcs = funcs; 1127 if (name) { 1128 __va_list ap; 1129 1130 __va_start(ap, name); 1131 encoder->name = kvasprintf(GFP_KERNEL, name, ap); 1132 __va_end(ap); 1133 } else { 1134 encoder->name = kasprintf(GFP_KERNEL, "%s-%d", 1135 drm_encoder_enum_list[encoder_type].name, 1136 encoder->base.id); 1137 } 1138 if (!encoder->name) { 1139 ret = -ENOMEM; 1140 goto out_put; 1141 } 1142 1143 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1144 dev->mode_config.num_encoder++; 1145 1146 out_put: 1147 if (ret) 1148 drm_mode_object_put(dev, &encoder->base); 1149 1150 out_unlock: 1151 drm_modeset_unlock_all(dev); 1152 1153 return ret; 1154 } 1155 EXPORT_SYMBOL(drm_encoder_init); 1156 1157 /** 1158 * drm_encoder_index - find the index of a registered encoder 1159 * @encoder: encoder to find index for 1160 * 1161 * Given a registered encoder, return the index of that encoder within a DRM 1162 * device's list of encoders. 1163 */ 1164 unsigned int drm_encoder_index(struct drm_encoder *encoder) 1165 { 1166 unsigned int index = 0; 1167 struct drm_encoder *tmp; 1168 1169 drm_for_each_encoder(tmp, encoder->dev) { 1170 if (tmp == encoder) 1171 return index; 1172 1173 index++; 1174 } 1175 1176 BUG(); 1177 } 1178 EXPORT_SYMBOL(drm_encoder_index); 1179 1180 /** 1181 * drm_encoder_cleanup - cleans up an initialised encoder 1182 * @encoder: encoder to cleanup 1183 * 1184 * Cleans up the encoder but doesn't free the object. 1185 */ 1186 void drm_encoder_cleanup(struct drm_encoder *encoder) 1187 { 1188 struct drm_device *dev = encoder->dev; 1189 1190 drm_modeset_lock_all(dev); 1191 drm_mode_object_put(dev, &encoder->base); 1192 kfree(encoder->name); 1193 list_del(&encoder->head); 1194 dev->mode_config.num_encoder--; 1195 drm_modeset_unlock_all(dev); 1196 1197 memset(encoder, 0, sizeof(*encoder)); 1198 } 1199 EXPORT_SYMBOL(drm_encoder_cleanup); 1200 1201 /** 1202 * drm_universal_plane_init - Initialize a new universal plane object 1203 * @dev: DRM device 1204 * @plane: plane object to init 1205 * @possible_crtcs: bitmask of possible CRTCs 1206 * @funcs: callbacks for the new plane 1207 * @formats: array of supported formats (%DRM_FORMAT_*) 1208 * @format_count: number of elements in @formats 1209 * @type: type of plane (overlay, primary, cursor) 1210 * @name: printf style format string for the plane name, or NULL for default name 1211 * 1212 * Initializes a plane object of type @type. 1213 * 1214 * Returns: 1215 * Zero on success, error code on failure. 1216 */ 1217 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1218 unsigned long possible_crtcs, 1219 const struct drm_plane_funcs *funcs, 1220 const uint32_t *formats, unsigned int format_count, 1221 enum drm_plane_type type, 1222 const char *name, ...) 1223 { 1224 struct drm_mode_config *config = &dev->mode_config; 1225 int ret; 1226 1227 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1228 if (ret) 1229 return ret; 1230 1231 drm_modeset_lock_init(&plane->mutex); 1232 1233 plane->base.properties = &plane->properties; 1234 plane->dev = dev; 1235 plane->funcs = funcs; 1236 plane->format_types = kmalloc(sizeof(uint32_t) * format_count, 1237 M_DRM, M_WAITOK); 1238 if (!plane->format_types) { 1239 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1240 drm_mode_object_put(dev, &plane->base); 1241 return -ENOMEM; 1242 } 1243 1244 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1245 plane->format_count = format_count; 1246 plane->possible_crtcs = possible_crtcs; 1247 plane->type = type; 1248 1249 list_add_tail(&plane->head, &config->plane_list); 1250 config->num_total_plane++; 1251 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1252 config->num_overlay_plane++; 1253 1254 drm_object_attach_property(&plane->base, 1255 config->plane_type_property, 1256 plane->type); 1257 1258 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 1259 drm_object_attach_property(&plane->base, config->prop_fb_id, 0); 1260 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); 1261 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); 1262 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); 1263 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); 1264 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); 1265 drm_object_attach_property(&plane->base, config->prop_src_x, 0); 1266 drm_object_attach_property(&plane->base, config->prop_src_y, 0); 1267 drm_object_attach_property(&plane->base, config->prop_src_w, 0); 1268 drm_object_attach_property(&plane->base, config->prop_src_h, 0); 1269 } 1270 1271 return 0; 1272 } 1273 EXPORT_SYMBOL(drm_universal_plane_init); 1274 1275 /** 1276 * drm_plane_init - Initialize a legacy plane 1277 * @dev: DRM device 1278 * @plane: plane object to init 1279 * @possible_crtcs: bitmask of possible CRTCs 1280 * @funcs: callbacks for the new plane 1281 * @formats: array of supported formats (%DRM_FORMAT_*) 1282 * @format_count: number of elements in @formats 1283 * @is_primary: plane type (primary vs overlay) 1284 * 1285 * Legacy API to initialize a DRM plane. 1286 * 1287 * New drivers should call drm_universal_plane_init() instead. 1288 * 1289 * Returns: 1290 * Zero on success, error code on failure. 1291 */ 1292 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1293 unsigned long possible_crtcs, 1294 const struct drm_plane_funcs *funcs, 1295 const uint32_t *formats, unsigned int format_count, 1296 bool is_primary) 1297 { 1298 enum drm_plane_type type; 1299 1300 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1301 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1302 formats, format_count, type, NULL); 1303 } 1304 EXPORT_SYMBOL(drm_plane_init); 1305 1306 /** 1307 * drm_plane_cleanup - Clean up the core plane usage 1308 * @plane: plane to cleanup 1309 * 1310 * This function cleans up @plane and removes it from the DRM mode setting 1311 * core. Note that the function does *not* free the plane structure itself, 1312 * this is the responsibility of the caller. 1313 */ 1314 void drm_plane_cleanup(struct drm_plane *plane) 1315 { 1316 struct drm_device *dev = plane->dev; 1317 1318 drm_modeset_lock_all(dev); 1319 kfree(plane->format_types); 1320 drm_mode_object_put(dev, &plane->base); 1321 1322 BUG_ON(list_empty(&plane->head)); 1323 1324 list_del(&plane->head); 1325 dev->mode_config.num_total_plane--; 1326 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1327 dev->mode_config.num_overlay_plane--; 1328 drm_modeset_unlock_all(dev); 1329 1330 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1331 if (plane->state && plane->funcs->atomic_destroy_state) 1332 plane->funcs->atomic_destroy_state(plane, plane->state); 1333 1334 memset(plane, 0, sizeof(*plane)); 1335 } 1336 EXPORT_SYMBOL(drm_plane_cleanup); 1337 1338 /** 1339 * drm_plane_index - find the index of a registered plane 1340 * @plane: plane to find index for 1341 * 1342 * Given a registered plane, return the index of that CRTC within a DRM 1343 * device's list of planes. 1344 */ 1345 unsigned int drm_plane_index(struct drm_plane *plane) 1346 { 1347 unsigned int index = 0; 1348 struct drm_plane *tmp; 1349 1350 drm_for_each_plane(tmp, plane->dev) { 1351 if (tmp == plane) 1352 return index; 1353 1354 index++; 1355 } 1356 1357 BUG(); 1358 } 1359 EXPORT_SYMBOL(drm_plane_index); 1360 1361 /** 1362 * drm_plane_from_index - find the registered plane at an index 1363 * @dev: DRM device 1364 * @idx: index of registered plane to find for 1365 * 1366 * Given a plane index, return the registered plane from DRM device's 1367 * list of planes with matching index. 1368 */ 1369 struct drm_plane * 1370 drm_plane_from_index(struct drm_device *dev, int idx) 1371 { 1372 struct drm_plane *plane; 1373 unsigned int i = 0; 1374 1375 drm_for_each_plane(plane, dev) { 1376 if (i == idx) 1377 return plane; 1378 i++; 1379 } 1380 return NULL; 1381 } 1382 EXPORT_SYMBOL(drm_plane_from_index); 1383 1384 /** 1385 * drm_plane_force_disable - Forcibly disable a plane 1386 * @plane: plane to disable 1387 * 1388 * Forces the plane to be disabled. 1389 * 1390 * Used when the plane's current framebuffer is destroyed, 1391 * and when restoring fbdev mode. 1392 */ 1393 void drm_plane_force_disable(struct drm_plane *plane) 1394 { 1395 int ret; 1396 1397 if (!plane->fb) 1398 return; 1399 1400 plane->old_fb = plane->fb; 1401 ret = plane->funcs->disable_plane(plane); 1402 if (ret) { 1403 DRM_ERROR("failed to disable plane with busy fb\n"); 1404 plane->old_fb = NULL; 1405 return; 1406 } 1407 /* disconnect the plane from the fb and crtc: */ 1408 drm_framebuffer_unreference(plane->old_fb); 1409 plane->old_fb = NULL; 1410 plane->fb = NULL; 1411 plane->crtc = NULL; 1412 } 1413 EXPORT_SYMBOL(drm_plane_force_disable); 1414 1415 static int drm_mode_create_standard_properties(struct drm_device *dev) 1416 { 1417 struct drm_property *prop; 1418 1419 /* 1420 * Standard properties (apply to all connectors) 1421 */ 1422 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1423 DRM_MODE_PROP_IMMUTABLE, 1424 "EDID", 0); 1425 if (!prop) 1426 return -ENOMEM; 1427 dev->mode_config.edid_property = prop; 1428 1429 prop = drm_property_create_enum(dev, 0, 1430 "DPMS", drm_dpms_enum_list, 1431 ARRAY_SIZE(drm_dpms_enum_list)); 1432 if (!prop) 1433 return -ENOMEM; 1434 dev->mode_config.dpms_property = prop; 1435 1436 prop = drm_property_create(dev, 1437 DRM_MODE_PROP_BLOB | 1438 DRM_MODE_PROP_IMMUTABLE, 1439 "PATH", 0); 1440 if (!prop) 1441 return -ENOMEM; 1442 dev->mode_config.path_property = prop; 1443 1444 prop = drm_property_create(dev, 1445 DRM_MODE_PROP_BLOB | 1446 DRM_MODE_PROP_IMMUTABLE, 1447 "TILE", 0); 1448 if (!prop) 1449 return -ENOMEM; 1450 dev->mode_config.tile_property = prop; 1451 1452 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1453 "type", drm_plane_type_enum_list, 1454 ARRAY_SIZE(drm_plane_type_enum_list)); 1455 if (!prop) 1456 return -ENOMEM; 1457 dev->mode_config.plane_type_property = prop; 1458 1459 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1460 "SRC_X", 0, UINT_MAX); 1461 if (!prop) 1462 return -ENOMEM; 1463 dev->mode_config.prop_src_x = prop; 1464 1465 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1466 "SRC_Y", 0, UINT_MAX); 1467 if (!prop) 1468 return -ENOMEM; 1469 dev->mode_config.prop_src_y = prop; 1470 1471 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1472 "SRC_W", 0, UINT_MAX); 1473 if (!prop) 1474 return -ENOMEM; 1475 dev->mode_config.prop_src_w = prop; 1476 1477 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1478 "SRC_H", 0, UINT_MAX); 1479 if (!prop) 1480 return -ENOMEM; 1481 dev->mode_config.prop_src_h = prop; 1482 1483 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1484 "CRTC_X", INT_MIN, INT_MAX); 1485 if (!prop) 1486 return -ENOMEM; 1487 dev->mode_config.prop_crtc_x = prop; 1488 1489 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1490 "CRTC_Y", INT_MIN, INT_MAX); 1491 if (!prop) 1492 return -ENOMEM; 1493 dev->mode_config.prop_crtc_y = prop; 1494 1495 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1496 "CRTC_W", 0, INT_MAX); 1497 if (!prop) 1498 return -ENOMEM; 1499 dev->mode_config.prop_crtc_w = prop; 1500 1501 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1502 "CRTC_H", 0, INT_MAX); 1503 if (!prop) 1504 return -ENOMEM; 1505 dev->mode_config.prop_crtc_h = prop; 1506 1507 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1508 "FB_ID", DRM_MODE_OBJECT_FB); 1509 if (!prop) 1510 return -ENOMEM; 1511 dev->mode_config.prop_fb_id = prop; 1512 1513 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1514 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 1515 if (!prop) 1516 return -ENOMEM; 1517 dev->mode_config.prop_crtc_id = prop; 1518 1519 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 1520 "ACTIVE"); 1521 if (!prop) 1522 return -ENOMEM; 1523 dev->mode_config.prop_active = prop; 1524 1525 prop = drm_property_create(dev, 1526 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 1527 "MODE_ID", 0); 1528 if (!prop) 1529 return -ENOMEM; 1530 dev->mode_config.prop_mode_id = prop; 1531 1532 prop = drm_property_create(dev, 1533 DRM_MODE_PROP_BLOB, 1534 "DEGAMMA_LUT", 0); 1535 if (!prop) 1536 return -ENOMEM; 1537 dev->mode_config.degamma_lut_property = prop; 1538 1539 prop = drm_property_create_range(dev, 1540 DRM_MODE_PROP_IMMUTABLE, 1541 "DEGAMMA_LUT_SIZE", 0, UINT_MAX); 1542 if (!prop) 1543 return -ENOMEM; 1544 dev->mode_config.degamma_lut_size_property = prop; 1545 1546 prop = drm_property_create(dev, 1547 DRM_MODE_PROP_BLOB, 1548 "CTM", 0); 1549 if (!prop) 1550 return -ENOMEM; 1551 dev->mode_config.ctm_property = prop; 1552 1553 prop = drm_property_create(dev, 1554 DRM_MODE_PROP_BLOB, 1555 "GAMMA_LUT", 0); 1556 if (!prop) 1557 return -ENOMEM; 1558 dev->mode_config.gamma_lut_property = prop; 1559 1560 prop = drm_property_create_range(dev, 1561 DRM_MODE_PROP_IMMUTABLE, 1562 "GAMMA_LUT_SIZE", 0, UINT_MAX); 1563 if (!prop) 1564 return -ENOMEM; 1565 dev->mode_config.gamma_lut_size_property = prop; 1566 1567 return 0; 1568 } 1569 1570 /** 1571 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1572 * @dev: DRM device 1573 * 1574 * Called by a driver the first time a DVI-I connector is made. 1575 */ 1576 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1577 { 1578 struct drm_property *dvi_i_selector; 1579 struct drm_property *dvi_i_subconnector; 1580 1581 if (dev->mode_config.dvi_i_select_subconnector_property) 1582 return 0; 1583 1584 dvi_i_selector = 1585 drm_property_create_enum(dev, 0, 1586 "select subconnector", 1587 drm_dvi_i_select_enum_list, 1588 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1589 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1590 1591 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1592 "subconnector", 1593 drm_dvi_i_subconnector_enum_list, 1594 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1595 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1596 1597 return 0; 1598 } 1599 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1600 1601 /** 1602 * drm_create_tv_properties - create TV specific connector properties 1603 * @dev: DRM device 1604 * @num_modes: number of different TV formats (modes) supported 1605 * @modes: array of pointers to strings containing name of each format 1606 * 1607 * Called by a driver's TV initialization routine, this function creates 1608 * the TV specific connector properties for a given device. Caller is 1609 * responsible for allocating a list of format names and passing them to 1610 * this routine. 1611 */ 1612 int drm_mode_create_tv_properties(struct drm_device *dev, 1613 unsigned int num_modes, 1614 const char * const modes[]) 1615 { 1616 struct drm_property *tv_selector; 1617 struct drm_property *tv_subconnector; 1618 unsigned int i; 1619 1620 if (dev->mode_config.tv_select_subconnector_property) 1621 return 0; 1622 1623 /* 1624 * Basic connector properties 1625 */ 1626 tv_selector = drm_property_create_enum(dev, 0, 1627 "select subconnector", 1628 drm_tv_select_enum_list, 1629 ARRAY_SIZE(drm_tv_select_enum_list)); 1630 if (!tv_selector) 1631 goto nomem; 1632 1633 dev->mode_config.tv_select_subconnector_property = tv_selector; 1634 1635 tv_subconnector = 1636 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1637 "subconnector", 1638 drm_tv_subconnector_enum_list, 1639 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1640 if (!tv_subconnector) 1641 goto nomem; 1642 dev->mode_config.tv_subconnector_property = tv_subconnector; 1643 1644 /* 1645 * Other, TV specific properties: margins & TV modes. 1646 */ 1647 dev->mode_config.tv_left_margin_property = 1648 drm_property_create_range(dev, 0, "left margin", 0, 100); 1649 if (!dev->mode_config.tv_left_margin_property) 1650 goto nomem; 1651 1652 dev->mode_config.tv_right_margin_property = 1653 drm_property_create_range(dev, 0, "right margin", 0, 100); 1654 if (!dev->mode_config.tv_right_margin_property) 1655 goto nomem; 1656 1657 dev->mode_config.tv_top_margin_property = 1658 drm_property_create_range(dev, 0, "top margin", 0, 100); 1659 if (!dev->mode_config.tv_top_margin_property) 1660 goto nomem; 1661 1662 dev->mode_config.tv_bottom_margin_property = 1663 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1664 if (!dev->mode_config.tv_bottom_margin_property) 1665 goto nomem; 1666 1667 dev->mode_config.tv_mode_property = 1668 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1669 "mode", num_modes); 1670 if (!dev->mode_config.tv_mode_property) 1671 goto nomem; 1672 1673 for (i = 0; i < num_modes; i++) 1674 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1675 i, modes[i]); 1676 1677 dev->mode_config.tv_brightness_property = 1678 drm_property_create_range(dev, 0, "brightness", 0, 100); 1679 if (!dev->mode_config.tv_brightness_property) 1680 goto nomem; 1681 1682 dev->mode_config.tv_contrast_property = 1683 drm_property_create_range(dev, 0, "contrast", 0, 100); 1684 if (!dev->mode_config.tv_contrast_property) 1685 goto nomem; 1686 1687 dev->mode_config.tv_flicker_reduction_property = 1688 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1689 if (!dev->mode_config.tv_flicker_reduction_property) 1690 goto nomem; 1691 1692 dev->mode_config.tv_overscan_property = 1693 drm_property_create_range(dev, 0, "overscan", 0, 100); 1694 if (!dev->mode_config.tv_overscan_property) 1695 goto nomem; 1696 1697 dev->mode_config.tv_saturation_property = 1698 drm_property_create_range(dev, 0, "saturation", 0, 100); 1699 if (!dev->mode_config.tv_saturation_property) 1700 goto nomem; 1701 1702 dev->mode_config.tv_hue_property = 1703 drm_property_create_range(dev, 0, "hue", 0, 100); 1704 if (!dev->mode_config.tv_hue_property) 1705 goto nomem; 1706 1707 return 0; 1708 nomem: 1709 return -ENOMEM; 1710 } 1711 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1712 1713 /** 1714 * drm_mode_create_scaling_mode_property - create scaling mode property 1715 * @dev: DRM device 1716 * 1717 * Called by a driver the first time it's needed, must be attached to desired 1718 * connectors. 1719 */ 1720 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1721 { 1722 struct drm_property *scaling_mode; 1723 1724 if (dev->mode_config.scaling_mode_property) 1725 return 0; 1726 1727 scaling_mode = 1728 drm_property_create_enum(dev, 0, "scaling mode", 1729 drm_scaling_mode_enum_list, 1730 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1731 1732 dev->mode_config.scaling_mode_property = scaling_mode; 1733 1734 return 0; 1735 } 1736 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1737 1738 /** 1739 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1740 * @dev: DRM device 1741 * 1742 * Called by a driver the first time it's needed, must be attached to desired 1743 * connectors. 1744 * 1745 * Returns: 1746 * Zero on success, negative errno on failure. 1747 */ 1748 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1749 { 1750 if (dev->mode_config.aspect_ratio_property) 1751 return 0; 1752 1753 dev->mode_config.aspect_ratio_property = 1754 drm_property_create_enum(dev, 0, "aspect ratio", 1755 drm_aspect_ratio_enum_list, 1756 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1757 1758 if (dev->mode_config.aspect_ratio_property == NULL) 1759 return -ENOMEM; 1760 1761 return 0; 1762 } 1763 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1764 1765 /** 1766 * drm_mode_create_dirty_property - create dirty property 1767 * @dev: DRM device 1768 * 1769 * Called by a driver the first time it's needed, must be attached to desired 1770 * connectors. 1771 */ 1772 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1773 { 1774 struct drm_property *dirty_info; 1775 1776 if (dev->mode_config.dirty_info_property) 1777 return 0; 1778 1779 dirty_info = 1780 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1781 "dirty", 1782 drm_dirty_info_enum_list, 1783 ARRAY_SIZE(drm_dirty_info_enum_list)); 1784 dev->mode_config.dirty_info_property = dirty_info; 1785 1786 return 0; 1787 } 1788 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1789 1790 /** 1791 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1792 * @dev: DRM device 1793 * 1794 * Create the the suggested x/y offset property for connectors. 1795 */ 1796 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1797 { 1798 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1799 return 0; 1800 1801 dev->mode_config.suggested_x_property = 1802 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1803 1804 dev->mode_config.suggested_y_property = 1805 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1806 1807 if (dev->mode_config.suggested_x_property == NULL || 1808 dev->mode_config.suggested_y_property == NULL) 1809 return -ENOMEM; 1810 return 0; 1811 } 1812 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1813 1814 /** 1815 * drm_mode_getresources - get graphics configuration 1816 * @dev: drm device for the ioctl 1817 * @data: data pointer for the ioctl 1818 * @file_priv: drm file for the ioctl call 1819 * 1820 * Construct a set of configuration description structures and return 1821 * them to the user, including CRTC, connector and framebuffer configuration. 1822 * 1823 * Called by the user via ioctl. 1824 * 1825 * Returns: 1826 * Zero on success, negative errno on failure. 1827 */ 1828 int drm_mode_getresources(struct drm_device *dev, void *data, 1829 struct drm_file *file_priv) 1830 { 1831 struct drm_mode_card_res *card_res = data; 1832 struct list_head *lh; 1833 struct drm_framebuffer *fb; 1834 struct drm_connector *connector; 1835 struct drm_crtc *crtc; 1836 struct drm_encoder *encoder; 1837 int ret = 0; 1838 int connector_count = 0; 1839 int crtc_count = 0; 1840 int fb_count = 0; 1841 int encoder_count = 0; 1842 int copied = 0; 1843 uint32_t __user *fb_id; 1844 uint32_t __user *crtc_id; 1845 uint32_t __user *connector_id; 1846 uint32_t __user *encoder_id; 1847 1848 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1849 return -EINVAL; 1850 1851 1852 mutex_lock(&file_priv->fbs_lock); 1853 /* 1854 * For the non-control nodes we need to limit the list of resources 1855 * by IDs in the group list for this node 1856 */ 1857 list_for_each(lh, &file_priv->fbs) 1858 fb_count++; 1859 1860 /* handle this in 4 parts */ 1861 /* FBs */ 1862 if (card_res->count_fbs >= fb_count) { 1863 copied = 0; 1864 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1865 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1866 if (put_user(fb->base.id, fb_id + copied)) { 1867 mutex_unlock(&file_priv->fbs_lock); 1868 return -EFAULT; 1869 } 1870 copied++; 1871 } 1872 } 1873 card_res->count_fbs = fb_count; 1874 mutex_unlock(&file_priv->fbs_lock); 1875 1876 /* mode_config.mutex protects the connector list against e.g. DP MST 1877 * connector hot-adding. CRTC/Plane lists are invariant. */ 1878 mutex_lock(&dev->mode_config.mutex); 1879 drm_for_each_crtc(crtc, dev) 1880 crtc_count++; 1881 1882 drm_for_each_connector(connector, dev) 1883 connector_count++; 1884 1885 drm_for_each_encoder(encoder, dev) 1886 encoder_count++; 1887 1888 card_res->max_height = dev->mode_config.max_height; 1889 card_res->min_height = dev->mode_config.min_height; 1890 card_res->max_width = dev->mode_config.max_width; 1891 card_res->min_width = dev->mode_config.min_width; 1892 1893 /* CRTCs */ 1894 if (card_res->count_crtcs >= crtc_count) { 1895 copied = 0; 1896 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1897 drm_for_each_crtc(crtc, dev) { 1898 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", 1899 crtc->base.id, crtc->name); 1900 if (put_user(crtc->base.id, crtc_id + copied)) { 1901 ret = -EFAULT; 1902 goto out; 1903 } 1904 copied++; 1905 } 1906 } 1907 card_res->count_crtcs = crtc_count; 1908 1909 /* Encoders */ 1910 if (card_res->count_encoders >= encoder_count) { 1911 copied = 0; 1912 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1913 drm_for_each_encoder(encoder, dev) { 1914 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1915 encoder->name); 1916 if (put_user(encoder->base.id, encoder_id + 1917 copied)) { 1918 ret = -EFAULT; 1919 goto out; 1920 } 1921 copied++; 1922 } 1923 } 1924 card_res->count_encoders = encoder_count; 1925 1926 /* Connectors */ 1927 if (card_res->count_connectors >= connector_count) { 1928 copied = 0; 1929 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1930 drm_for_each_connector(connector, dev) { 1931 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1932 connector->base.id, 1933 connector->name); 1934 if (put_user(connector->base.id, 1935 connector_id + copied)) { 1936 ret = -EFAULT; 1937 goto out; 1938 } 1939 copied++; 1940 } 1941 } 1942 card_res->count_connectors = connector_count; 1943 1944 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1945 card_res->count_connectors, card_res->count_encoders); 1946 1947 out: 1948 mutex_unlock(&dev->mode_config.mutex); 1949 return ret; 1950 } 1951 1952 /** 1953 * drm_mode_getcrtc - get CRTC configuration 1954 * @dev: drm device for the ioctl 1955 * @data: data pointer for the ioctl 1956 * @file_priv: drm file for the ioctl call 1957 * 1958 * Construct a CRTC configuration structure to return to the user. 1959 * 1960 * Called by the user via ioctl. 1961 * 1962 * Returns: 1963 * Zero on success, negative errno on failure. 1964 */ 1965 int drm_mode_getcrtc(struct drm_device *dev, 1966 void *data, struct drm_file *file_priv) 1967 { 1968 struct drm_mode_crtc *crtc_resp = data; 1969 struct drm_crtc *crtc; 1970 1971 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1972 return -EINVAL; 1973 1974 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 1975 if (!crtc) 1976 return -ENOENT; 1977 1978 drm_modeset_lock_crtc(crtc, crtc->primary); 1979 crtc_resp->gamma_size = crtc->gamma_size; 1980 if (crtc->primary->fb) 1981 crtc_resp->fb_id = crtc->primary->fb->base.id; 1982 else 1983 crtc_resp->fb_id = 0; 1984 1985 if (crtc->state) { 1986 crtc_resp->x = crtc->primary->state->src_x >> 16; 1987 crtc_resp->y = crtc->primary->state->src_y >> 16; 1988 if (crtc->state->enable) { 1989 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); 1990 crtc_resp->mode_valid = 1; 1991 1992 } else { 1993 crtc_resp->mode_valid = 0; 1994 } 1995 } else { 1996 crtc_resp->x = crtc->x; 1997 crtc_resp->y = crtc->y; 1998 if (crtc->enabled) { 1999 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); 2000 crtc_resp->mode_valid = 1; 2001 2002 } else { 2003 crtc_resp->mode_valid = 0; 2004 } 2005 } 2006 drm_modeset_unlock_crtc(crtc); 2007 2008 return 0; 2009 } 2010 2011 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 2012 const struct drm_file *file_priv) 2013 { 2014 /* 2015 * If user-space hasn't configured the driver to expose the stereo 3D 2016 * modes, don't expose them. 2017 */ 2018 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 2019 return false; 2020 2021 return true; 2022 } 2023 2024 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 2025 { 2026 /* For atomic drivers only state objects are synchronously updated and 2027 * protected by modeset locks, so check those first. */ 2028 if (connector->state) 2029 return connector->state->best_encoder; 2030 return connector->encoder; 2031 } 2032 2033 /* helper for getconnector and getproperties ioctls */ 2034 static int get_properties(struct drm_mode_object *obj, bool atomic, 2035 uint32_t __user *prop_ptr, uint64_t __user *prop_values, 2036 uint32_t *arg_count_props) 2037 { 2038 int props_count; 2039 int i, ret, copied; 2040 2041 props_count = obj->properties->count; 2042 if (!atomic) 2043 props_count -= obj->properties->atomic_count; 2044 2045 if ((*arg_count_props >= props_count) && props_count) { 2046 for (i = 0, copied = 0; copied < props_count; i++) { 2047 struct drm_property *prop = obj->properties->properties[i]; 2048 uint64_t val; 2049 2050 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) 2051 continue; 2052 2053 ret = drm_object_property_get_value(obj, prop, &val); 2054 if (ret) 2055 return ret; 2056 2057 if (put_user(prop->base.id, prop_ptr + copied)) 2058 return -EFAULT; 2059 2060 if (put_user(val, prop_values + copied)) 2061 return -EFAULT; 2062 2063 copied++; 2064 } 2065 } 2066 *arg_count_props = props_count; 2067 2068 return 0; 2069 } 2070 2071 /** 2072 * drm_mode_getconnector - get connector configuration 2073 * @dev: drm device for the ioctl 2074 * @data: data pointer for the ioctl 2075 * @file_priv: drm file for the ioctl call 2076 * 2077 * Construct a connector configuration structure to return to the user. 2078 * 2079 * Called by the user via ioctl. 2080 * 2081 * Returns: 2082 * Zero on success, negative errno on failure. 2083 */ 2084 int drm_mode_getconnector(struct drm_device *dev, void *data, 2085 struct drm_file *file_priv) 2086 { 2087 struct drm_mode_get_connector *out_resp = data; 2088 struct drm_connector *connector; 2089 struct drm_encoder *encoder; 2090 struct drm_display_mode *mode; 2091 int mode_count = 0; 2092 int encoders_count = 0; 2093 int ret = 0; 2094 int copied = 0; 2095 int i; 2096 struct drm_mode_modeinfo u_mode; 2097 struct drm_mode_modeinfo __user *mode_ptr; 2098 uint32_t __user *encoder_ptr; 2099 2100 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2101 return -EINVAL; 2102 2103 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2104 2105 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 2106 2107 mutex_lock(&dev->mode_config.mutex); 2108 2109 connector = drm_connector_find(dev, out_resp->connector_id); 2110 if (!connector) { 2111 ret = -ENOENT; 2112 goto out_unlock; 2113 } 2114 2115 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) 2116 if (connector->encoder_ids[i] != 0) 2117 encoders_count++; 2118 2119 if (out_resp->count_modes == 0) { 2120 connector->funcs->fill_modes(connector, 2121 dev->mode_config.max_width, 2122 dev->mode_config.max_height); 2123 } 2124 2125 /* delayed so we get modes regardless of pre-fill_modes state */ 2126 list_for_each_entry(mode, &connector->modes, head) 2127 if (drm_mode_expose_to_userspace(mode, file_priv)) 2128 mode_count++; 2129 2130 out_resp->connector_id = connector->base.id; 2131 out_resp->connector_type = connector->connector_type; 2132 out_resp->connector_type_id = connector->connector_type_id; 2133 out_resp->mm_width = connector->display_info.width_mm; 2134 out_resp->mm_height = connector->display_info.height_mm; 2135 out_resp->subpixel = connector->display_info.subpixel_order; 2136 out_resp->connection = connector->status; 2137 2138 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2139 encoder = drm_connector_get_encoder(connector); 2140 if (encoder) 2141 out_resp->encoder_id = encoder->base.id; 2142 else 2143 out_resp->encoder_id = 0; 2144 2145 /* 2146 * This ioctl is called twice, once to determine how much space is 2147 * needed, and the 2nd time to fill it. 2148 */ 2149 if ((out_resp->count_modes >= mode_count) && mode_count) { 2150 copied = 0; 2151 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2152 list_for_each_entry(mode, &connector->modes, head) { 2153 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2154 continue; 2155 2156 drm_mode_convert_to_umode(&u_mode, mode); 2157 if (copy_to_user(mode_ptr + copied, 2158 &u_mode, sizeof(u_mode))) { 2159 ret = -EFAULT; 2160 goto out; 2161 } 2162 copied++; 2163 } 2164 } 2165 out_resp->count_modes = mode_count; 2166 2167 ret = get_properties(&connector->base, file_priv->atomic, 2168 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2169 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2170 &out_resp->count_props); 2171 if (ret) 2172 goto out; 2173 2174 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2175 copied = 0; 2176 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2177 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2178 if (connector->encoder_ids[i] != 0) { 2179 if (put_user(connector->encoder_ids[i], 2180 encoder_ptr + copied)) { 2181 ret = -EFAULT; 2182 goto out; 2183 } 2184 copied++; 2185 } 2186 } 2187 } 2188 out_resp->count_encoders = encoders_count; 2189 2190 out: 2191 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2192 2193 out_unlock: 2194 mutex_unlock(&dev->mode_config.mutex); 2195 2196 return ret; 2197 } 2198 2199 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2200 { 2201 struct drm_connector *connector; 2202 struct drm_device *dev = encoder->dev; 2203 bool uses_atomic = false; 2204 2205 /* For atomic drivers only state objects are synchronously updated and 2206 * protected by modeset locks, so check those first. */ 2207 drm_for_each_connector(connector, dev) { 2208 if (!connector->state) 2209 continue; 2210 2211 uses_atomic = true; 2212 2213 if (connector->state->best_encoder != encoder) 2214 continue; 2215 2216 return connector->state->crtc; 2217 } 2218 2219 /* Don't return stale data (e.g. pending async disable). */ 2220 if (uses_atomic) 2221 return NULL; 2222 2223 return encoder->crtc; 2224 } 2225 2226 /** 2227 * drm_mode_getencoder - get encoder configuration 2228 * @dev: drm device for the ioctl 2229 * @data: data pointer for the ioctl 2230 * @file_priv: drm file for the ioctl call 2231 * 2232 * Construct a encoder configuration structure to return to the user. 2233 * 2234 * Called by the user via ioctl. 2235 * 2236 * Returns: 2237 * Zero on success, negative errno on failure. 2238 */ 2239 int drm_mode_getencoder(struct drm_device *dev, void *data, 2240 struct drm_file *file_priv) 2241 { 2242 struct drm_mode_get_encoder *enc_resp = data; 2243 struct drm_encoder *encoder; 2244 struct drm_crtc *crtc; 2245 2246 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2247 return -EINVAL; 2248 2249 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2250 if (!encoder) 2251 return -ENOENT; 2252 2253 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2254 crtc = drm_encoder_get_crtc(encoder); 2255 if (crtc) 2256 enc_resp->crtc_id = crtc->base.id; 2257 else 2258 enc_resp->crtc_id = 0; 2259 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2260 2261 enc_resp->encoder_type = encoder->encoder_type; 2262 enc_resp->encoder_id = encoder->base.id; 2263 enc_resp->possible_crtcs = encoder->possible_crtcs; 2264 enc_resp->possible_clones = encoder->possible_clones; 2265 2266 return 0; 2267 } 2268 2269 /** 2270 * drm_mode_getplane_res - enumerate all plane resources 2271 * @dev: DRM device 2272 * @data: ioctl data 2273 * @file_priv: DRM file info 2274 * 2275 * Construct a list of plane ids to return to the user. 2276 * 2277 * Called by the user via ioctl. 2278 * 2279 * Returns: 2280 * Zero on success, negative errno on failure. 2281 */ 2282 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2283 struct drm_file *file_priv) 2284 { 2285 struct drm_mode_get_plane_res *plane_resp = data; 2286 struct drm_mode_config *config; 2287 struct drm_plane *plane; 2288 uint32_t __user *plane_ptr; 2289 int copied = 0; 2290 unsigned num_planes; 2291 2292 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2293 return -EINVAL; 2294 2295 config = &dev->mode_config; 2296 2297 if (file_priv->universal_planes) 2298 num_planes = config->num_total_plane; 2299 else 2300 num_planes = config->num_overlay_plane; 2301 2302 /* 2303 * This ioctl is called twice, once to determine how much space is 2304 * needed, and the 2nd time to fill it. 2305 */ 2306 if (num_planes && 2307 (plane_resp->count_planes >= num_planes)) { 2308 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2309 2310 /* Plane lists are invariant, no locking needed. */ 2311 drm_for_each_plane(plane, dev) { 2312 /* 2313 * Unless userspace set the 'universal planes' 2314 * capability bit, only advertise overlays. 2315 */ 2316 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2317 !file_priv->universal_planes) 2318 continue; 2319 2320 if (put_user(plane->base.id, plane_ptr + copied)) 2321 return -EFAULT; 2322 copied++; 2323 } 2324 } 2325 plane_resp->count_planes = num_planes; 2326 2327 return 0; 2328 } 2329 2330 /** 2331 * drm_mode_getplane - get plane configuration 2332 * @dev: DRM device 2333 * @data: ioctl data 2334 * @file_priv: DRM file info 2335 * 2336 * Construct a plane configuration structure to return to the user. 2337 * 2338 * Called by the user via ioctl. 2339 * 2340 * Returns: 2341 * Zero on success, negative errno on failure. 2342 */ 2343 int drm_mode_getplane(struct drm_device *dev, void *data, 2344 struct drm_file *file_priv) 2345 { 2346 struct drm_mode_get_plane *plane_resp = data; 2347 struct drm_plane *plane; 2348 uint32_t __user *format_ptr; 2349 2350 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2351 return -EINVAL; 2352 2353 plane = drm_plane_find(dev, plane_resp->plane_id); 2354 if (!plane) 2355 return -ENOENT; 2356 2357 drm_modeset_lock(&plane->mutex, NULL); 2358 if (plane->crtc) 2359 plane_resp->crtc_id = plane->crtc->base.id; 2360 else 2361 plane_resp->crtc_id = 0; 2362 2363 if (plane->fb) 2364 plane_resp->fb_id = plane->fb->base.id; 2365 else 2366 plane_resp->fb_id = 0; 2367 drm_modeset_unlock(&plane->mutex); 2368 2369 plane_resp->plane_id = plane->base.id; 2370 plane_resp->possible_crtcs = plane->possible_crtcs; 2371 plane_resp->gamma_size = 0; 2372 2373 /* 2374 * This ioctl is called twice, once to determine how much space is 2375 * needed, and the 2nd time to fill it. 2376 */ 2377 if (plane->format_count && 2378 (plane_resp->count_format_types >= plane->format_count)) { 2379 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2380 if (copy_to_user(format_ptr, 2381 plane->format_types, 2382 sizeof(uint32_t) * plane->format_count)) { 2383 return -EFAULT; 2384 } 2385 } 2386 plane_resp->count_format_types = plane->format_count; 2387 2388 return 0; 2389 } 2390 2391 /** 2392 * drm_plane_check_pixel_format - Check if the plane supports the pixel format 2393 * @plane: plane to check for format support 2394 * @format: the pixel format 2395 * 2396 * Returns: 2397 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL 2398 * otherwise. 2399 */ 2400 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format) 2401 { 2402 unsigned int i; 2403 2404 for (i = 0; i < plane->format_count; i++) { 2405 if (format == plane->format_types[i]) 2406 return 0; 2407 } 2408 2409 return -EINVAL; 2410 } 2411 2412 static int check_src_coords(uint32_t src_x, uint32_t src_y, 2413 uint32_t src_w, uint32_t src_h, 2414 const struct drm_framebuffer *fb) 2415 { 2416 unsigned int fb_width, fb_height; 2417 2418 fb_width = fb->width << 16; 2419 fb_height = fb->height << 16; 2420 2421 /* Make sure source coordinates are inside the fb. */ 2422 if (src_w > fb_width || 2423 src_x > fb_width - src_w || 2424 src_h > fb_height || 2425 src_y > fb_height - src_h) { 2426 DRM_DEBUG_KMS("Invalid source coordinates " 2427 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2428 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2429 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2430 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2431 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2432 return -ENOSPC; 2433 } 2434 2435 return 0; 2436 } 2437 2438 /* 2439 * setplane_internal - setplane handler for internal callers 2440 * 2441 * Note that we assume an extra reference has already been taken on fb. If the 2442 * update fails, this reference will be dropped before return; if it succeeds, 2443 * the previous framebuffer (if any) will be unreferenced instead. 2444 * 2445 * src_{x,y,w,h} are provided in 16.16 fixed point format 2446 */ 2447 static int __setplane_internal(struct drm_plane *plane, 2448 struct drm_crtc *crtc, 2449 struct drm_framebuffer *fb, 2450 int32_t crtc_x, int32_t crtc_y, 2451 uint32_t crtc_w, uint32_t crtc_h, 2452 /* src_{x,y,w,h} values are 16.16 fixed point */ 2453 uint32_t src_x, uint32_t src_y, 2454 uint32_t src_w, uint32_t src_h) 2455 { 2456 int ret = 0; 2457 2458 /* No fb means shut it down */ 2459 if (!fb) { 2460 plane->old_fb = plane->fb; 2461 ret = plane->funcs->disable_plane(plane); 2462 if (!ret) { 2463 plane->crtc = NULL; 2464 plane->fb = NULL; 2465 } else { 2466 plane->old_fb = NULL; 2467 } 2468 goto out; 2469 } 2470 2471 /* Check whether this plane is usable on this CRTC */ 2472 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2473 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2474 ret = -EINVAL; 2475 goto out; 2476 } 2477 2478 /* Check whether this plane supports the fb pixel format. */ 2479 ret = drm_plane_check_pixel_format(plane, fb->pixel_format); 2480 if (ret) { 2481 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2482 drm_get_format_name(fb->pixel_format)); 2483 goto out; 2484 } 2485 2486 /* Give drivers some help against integer overflows */ 2487 if (crtc_w > INT_MAX || 2488 crtc_x > INT_MAX - (int32_t) crtc_w || 2489 crtc_h > INT_MAX || 2490 crtc_y > INT_MAX - (int32_t) crtc_h) { 2491 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2492 crtc_w, crtc_h, crtc_x, crtc_y); 2493 ret = -ERANGE; 2494 goto out; 2495 } 2496 2497 ret = check_src_coords(src_x, src_y, src_w, src_h, fb); 2498 if (ret) 2499 goto out; 2500 2501 plane->old_fb = plane->fb; 2502 ret = plane->funcs->update_plane(plane, crtc, fb, 2503 crtc_x, crtc_y, crtc_w, crtc_h, 2504 src_x, src_y, src_w, src_h); 2505 if (!ret) { 2506 plane->crtc = crtc; 2507 plane->fb = fb; 2508 fb = NULL; 2509 } else { 2510 plane->old_fb = NULL; 2511 } 2512 2513 out: 2514 if (fb) 2515 drm_framebuffer_unreference(fb); 2516 if (plane->old_fb) 2517 drm_framebuffer_unreference(plane->old_fb); 2518 plane->old_fb = NULL; 2519 2520 return ret; 2521 } 2522 2523 static int setplane_internal(struct drm_plane *plane, 2524 struct drm_crtc *crtc, 2525 struct drm_framebuffer *fb, 2526 int32_t crtc_x, int32_t crtc_y, 2527 uint32_t crtc_w, uint32_t crtc_h, 2528 /* src_{x,y,w,h} values are 16.16 fixed point */ 2529 uint32_t src_x, uint32_t src_y, 2530 uint32_t src_w, uint32_t src_h) 2531 { 2532 int ret; 2533 2534 drm_modeset_lock_all(plane->dev); 2535 ret = __setplane_internal(plane, crtc, fb, 2536 crtc_x, crtc_y, crtc_w, crtc_h, 2537 src_x, src_y, src_w, src_h); 2538 drm_modeset_unlock_all(plane->dev); 2539 2540 return ret; 2541 } 2542 2543 /** 2544 * drm_mode_setplane - configure a plane's configuration 2545 * @dev: DRM device 2546 * @data: ioctl data* 2547 * @file_priv: DRM file info 2548 * 2549 * Set plane configuration, including placement, fb, scaling, and other factors. 2550 * Or pass a NULL fb to disable (planes may be disabled without providing a 2551 * valid crtc). 2552 * 2553 * Returns: 2554 * Zero on success, negative errno on failure. 2555 */ 2556 int drm_mode_setplane(struct drm_device *dev, void *data, 2557 struct drm_file *file_priv) 2558 { 2559 struct drm_mode_set_plane *plane_req = data; 2560 struct drm_plane *plane; 2561 struct drm_crtc *crtc = NULL; 2562 struct drm_framebuffer *fb = NULL; 2563 2564 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2565 return -EINVAL; 2566 2567 /* 2568 * First, find the plane, crtc, and fb objects. If not available, 2569 * we don't bother to call the driver. 2570 */ 2571 plane = drm_plane_find(dev, plane_req->plane_id); 2572 if (!plane) { 2573 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2574 plane_req->plane_id); 2575 return -ENOENT; 2576 } 2577 2578 if (plane_req->fb_id) { 2579 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2580 if (!fb) { 2581 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2582 plane_req->fb_id); 2583 return -ENOENT; 2584 } 2585 2586 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2587 if (!crtc) { 2588 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2589 plane_req->crtc_id); 2590 return -ENOENT; 2591 } 2592 } 2593 2594 /* 2595 * setplane_internal will take care of deref'ing either the old or new 2596 * framebuffer depending on success. 2597 */ 2598 return setplane_internal(plane, crtc, fb, 2599 plane_req->crtc_x, plane_req->crtc_y, 2600 plane_req->crtc_w, plane_req->crtc_h, 2601 plane_req->src_x, plane_req->src_y, 2602 plane_req->src_w, plane_req->src_h); 2603 } 2604 2605 /** 2606 * drm_mode_set_config_internal - helper to call ->set_config 2607 * @set: modeset config to set 2608 * 2609 * This is a little helper to wrap internal calls to the ->set_config driver 2610 * interface. The only thing it adds is correct refcounting dance. 2611 * 2612 * Returns: 2613 * Zero on success, negative errno on failure. 2614 */ 2615 int drm_mode_set_config_internal(struct drm_mode_set *set) 2616 { 2617 struct drm_crtc *crtc = set->crtc; 2618 struct drm_framebuffer *fb; 2619 struct drm_crtc *tmp; 2620 int ret; 2621 2622 /* 2623 * NOTE: ->set_config can also disable other crtcs (if we steal all 2624 * connectors from it), hence we need to refcount the fbs across all 2625 * crtcs. Atomic modeset will have saner semantics ... 2626 */ 2627 drm_for_each_crtc(tmp, crtc->dev) 2628 tmp->primary->old_fb = tmp->primary->fb; 2629 2630 fb = set->fb; 2631 2632 ret = crtc->funcs->set_config(set); 2633 if (ret == 0) { 2634 crtc->primary->crtc = crtc; 2635 crtc->primary->fb = fb; 2636 } 2637 2638 drm_for_each_crtc(tmp, crtc->dev) { 2639 if (tmp->primary->fb) 2640 drm_framebuffer_reference(tmp->primary->fb); 2641 if (tmp->primary->old_fb) 2642 drm_framebuffer_unreference(tmp->primary->old_fb); 2643 tmp->primary->old_fb = NULL; 2644 } 2645 2646 return ret; 2647 } 2648 EXPORT_SYMBOL(drm_mode_set_config_internal); 2649 2650 /** 2651 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode 2652 * @mode: mode to query 2653 * @hdisplay: hdisplay value to fill in 2654 * @vdisplay: vdisplay value to fill in 2655 * 2656 * The vdisplay value will be doubled if the specified mode is a stereo mode of 2657 * the appropriate layout. 2658 */ 2659 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, 2660 int *hdisplay, int *vdisplay) 2661 { 2662 struct drm_display_mode adjusted; 2663 2664 drm_mode_copy(&adjusted, mode); 2665 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 2666 *hdisplay = adjusted.crtc_hdisplay; 2667 *vdisplay = adjusted.crtc_vdisplay; 2668 } 2669 EXPORT_SYMBOL(drm_crtc_get_hv_timing); 2670 2671 /** 2672 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2673 * CRTC viewport 2674 * @crtc: CRTC that framebuffer will be displayed on 2675 * @x: x panning 2676 * @y: y panning 2677 * @mode: mode that framebuffer will be displayed under 2678 * @fb: framebuffer to check size of 2679 */ 2680 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2681 int x, int y, 2682 const struct drm_display_mode *mode, 2683 const struct drm_framebuffer *fb) 2684 2685 { 2686 int hdisplay, vdisplay; 2687 2688 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); 2689 2690 if (crtc->state && 2691 crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) | 2692 BIT(DRM_ROTATE_270))) 2693 swap(hdisplay, vdisplay); 2694 2695 return check_src_coords(x << 16, y << 16, 2696 hdisplay << 16, vdisplay << 16, fb); 2697 } 2698 EXPORT_SYMBOL(drm_crtc_check_viewport); 2699 2700 /** 2701 * drm_mode_setcrtc - set CRTC configuration 2702 * @dev: drm device for the ioctl 2703 * @data: data pointer for the ioctl 2704 * @file_priv: drm file for the ioctl call 2705 * 2706 * Build a new CRTC configuration based on user request. 2707 * 2708 * Called by the user via ioctl. 2709 * 2710 * Returns: 2711 * Zero on success, negative errno on failure. 2712 */ 2713 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2714 struct drm_file *file_priv) 2715 { 2716 struct drm_mode_config *config = &dev->mode_config; 2717 struct drm_mode_crtc *crtc_req = data; 2718 struct drm_crtc *crtc; 2719 struct drm_connector **connector_set = NULL, *connector; 2720 struct drm_framebuffer *fb = NULL; 2721 struct drm_display_mode *mode = NULL; 2722 struct drm_mode_set set; 2723 uint32_t __user *set_connectors_ptr; 2724 int ret; 2725 int i; 2726 2727 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2728 return -EINVAL; 2729 2730 /* 2731 * Universal plane src offsets are only 16.16, prevent havoc for 2732 * drivers using universal plane code internally. 2733 */ 2734 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) 2735 return -ERANGE; 2736 2737 drm_modeset_lock_all(dev); 2738 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2739 if (!crtc) { 2740 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2741 ret = -ENOENT; 2742 goto out; 2743 } 2744 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); 2745 2746 if (crtc_req->mode_valid) { 2747 /* If we have a mode we need a framebuffer. */ 2748 /* If we pass -1, set the mode with the currently bound fb */ 2749 if (crtc_req->fb_id == -1) { 2750 if (!crtc->primary->fb) { 2751 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2752 ret = -EINVAL; 2753 goto out; 2754 } 2755 fb = crtc->primary->fb; 2756 /* Make refcounting symmetric with the lookup path. */ 2757 drm_framebuffer_reference(fb); 2758 } else { 2759 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2760 if (!fb) { 2761 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2762 crtc_req->fb_id); 2763 ret = -ENOENT; 2764 goto out; 2765 } 2766 } 2767 2768 mode = drm_mode_create(dev); 2769 if (!mode) { 2770 ret = -ENOMEM; 2771 goto out; 2772 } 2773 2774 ret = drm_mode_convert_umode(mode, &crtc_req->mode); 2775 if (ret) { 2776 DRM_DEBUG_KMS("Invalid mode\n"); 2777 goto out; 2778 } 2779 2780 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 2781 2782 /* 2783 * Check whether the primary plane supports the fb pixel format. 2784 * Drivers not implementing the universal planes API use a 2785 * default formats list provided by the DRM core which doesn't 2786 * match real hardware capabilities. Skip the check in that 2787 * case. 2788 */ 2789 if (!crtc->primary->format_default) { 2790 ret = drm_plane_check_pixel_format(crtc->primary, 2791 fb->pixel_format); 2792 if (ret) { 2793 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2794 drm_get_format_name(fb->pixel_format)); 2795 goto out; 2796 } 2797 } 2798 2799 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2800 mode, fb); 2801 if (ret) 2802 goto out; 2803 2804 } 2805 2806 if (crtc_req->count_connectors == 0 && mode) { 2807 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2808 ret = -EINVAL; 2809 goto out; 2810 } 2811 2812 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2813 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2814 crtc_req->count_connectors); 2815 ret = -EINVAL; 2816 goto out; 2817 } 2818 2819 if (crtc_req->count_connectors > 0) { 2820 u32 out_id; 2821 2822 /* Avoid unbounded kernel memory allocation */ 2823 if (crtc_req->count_connectors > config->num_connector) { 2824 ret = -EINVAL; 2825 goto out; 2826 } 2827 2828 connector_set = kmalloc(crtc_req->count_connectors * 2829 sizeof(struct drm_connector *), 2830 M_DRM, M_WAITOK); 2831 if (!connector_set) { 2832 ret = -ENOMEM; 2833 goto out; 2834 } 2835 2836 for (i = 0; i < crtc_req->count_connectors; i++) { 2837 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2838 if (get_user(out_id, &set_connectors_ptr[i])) { 2839 ret = -EFAULT; 2840 goto out; 2841 } 2842 2843 connector = drm_connector_find(dev, out_id); 2844 if (!connector) { 2845 DRM_DEBUG_KMS("Connector id %d unknown\n", 2846 out_id); 2847 ret = -ENOENT; 2848 goto out; 2849 } 2850 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2851 connector->base.id, 2852 connector->name); 2853 2854 connector_set[i] = connector; 2855 } 2856 } 2857 2858 set.crtc = crtc; 2859 set.x = crtc_req->x; 2860 set.y = crtc_req->y; 2861 set.mode = mode; 2862 set.connectors = connector_set; 2863 set.num_connectors = crtc_req->count_connectors; 2864 set.fb = fb; 2865 ret = drm_mode_set_config_internal(&set); 2866 2867 out: 2868 if (fb) 2869 drm_framebuffer_unreference(fb); 2870 2871 kfree(connector_set); 2872 drm_mode_destroy(dev, mode); 2873 drm_modeset_unlock_all(dev); 2874 return ret; 2875 } 2876 2877 /** 2878 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2879 * universal plane handler call 2880 * @crtc: crtc to update cursor for 2881 * @req: data pointer for the ioctl 2882 * @file_priv: drm file for the ioctl call 2883 * 2884 * Legacy cursor ioctl's work directly with driver buffer handles. To 2885 * translate legacy ioctl calls into universal plane handler calls, we need to 2886 * wrap the native buffer handle in a drm_framebuffer. 2887 * 2888 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2889 * buffer with a pitch of 4*width; the universal plane interface should be used 2890 * directly in cases where the hardware can support other buffer settings and 2891 * userspace wants to make use of these capabilities. 2892 * 2893 * Returns: 2894 * Zero on success, negative errno on failure. 2895 */ 2896 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2897 struct drm_mode_cursor2 *req, 2898 struct drm_file *file_priv) 2899 { 2900 struct drm_device *dev = crtc->dev; 2901 struct drm_framebuffer *fb = NULL; 2902 struct drm_mode_fb_cmd2 fbreq = { 2903 .width = req->width, 2904 .height = req->height, 2905 .pixel_format = DRM_FORMAT_ARGB8888, 2906 .pitches = { req->width * 4 }, 2907 .handles = { req->handle }, 2908 }; 2909 int32_t crtc_x, crtc_y; 2910 uint32_t crtc_w = 0, crtc_h = 0; 2911 uint32_t src_w = 0, src_h = 0; 2912 int ret = 0; 2913 2914 BUG_ON(!crtc->cursor); 2915 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2916 2917 /* 2918 * Obtain fb we'll be using (either new or existing) and take an extra 2919 * reference to it if fb != null. setplane will take care of dropping 2920 * the reference if the plane update fails. 2921 */ 2922 if (req->flags & DRM_MODE_CURSOR_BO) { 2923 if (req->handle) { 2924 fb = internal_framebuffer_create(dev, &fbreq, file_priv); 2925 if (IS_ERR(fb)) { 2926 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2927 return PTR_ERR(fb); 2928 } 2929 } else { 2930 fb = NULL; 2931 } 2932 } else { 2933 fb = crtc->cursor->fb; 2934 if (fb) 2935 drm_framebuffer_reference(fb); 2936 } 2937 2938 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2939 crtc_x = req->x; 2940 crtc_y = req->y; 2941 } else { 2942 crtc_x = crtc->cursor_x; 2943 crtc_y = crtc->cursor_y; 2944 } 2945 2946 if (fb) { 2947 crtc_w = fb->width; 2948 crtc_h = fb->height; 2949 src_w = fb->width << 16; 2950 src_h = fb->height << 16; 2951 } 2952 2953 /* 2954 * setplane_internal will take care of deref'ing either the old or new 2955 * framebuffer depending on success. 2956 */ 2957 ret = __setplane_internal(crtc->cursor, crtc, fb, 2958 crtc_x, crtc_y, crtc_w, crtc_h, 2959 0, 0, src_w, src_h); 2960 2961 /* Update successful; save new cursor position, if necessary */ 2962 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2963 crtc->cursor_x = req->x; 2964 crtc->cursor_y = req->y; 2965 } 2966 2967 return ret; 2968 } 2969 2970 static int drm_mode_cursor_common(struct drm_device *dev, 2971 struct drm_mode_cursor2 *req, 2972 struct drm_file *file_priv) 2973 { 2974 struct drm_crtc *crtc; 2975 int ret = 0; 2976 2977 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2978 return -EINVAL; 2979 2980 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 2981 return -EINVAL; 2982 2983 crtc = drm_crtc_find(dev, req->crtc_id); 2984 if (!crtc) { 2985 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 2986 return -ENOENT; 2987 } 2988 2989 /* 2990 * If this crtc has a universal cursor plane, call that plane's update 2991 * handler rather than using legacy cursor handlers. 2992 */ 2993 drm_modeset_lock_crtc(crtc, crtc->cursor); 2994 if (crtc->cursor) { 2995 ret = drm_mode_cursor_universal(crtc, req, file_priv); 2996 goto out; 2997 } 2998 2999 if (req->flags & DRM_MODE_CURSOR_BO) { 3000 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 3001 ret = -ENXIO; 3002 goto out; 3003 } 3004 /* Turns off the cursor if handle is 0 */ 3005 if (crtc->funcs->cursor_set2) 3006 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 3007 req->width, req->height, req->hot_x, req->hot_y); 3008 else 3009 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 3010 req->width, req->height); 3011 } 3012 3013 if (req->flags & DRM_MODE_CURSOR_MOVE) { 3014 if (crtc->funcs->cursor_move) { 3015 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 3016 } else { 3017 ret = -EFAULT; 3018 goto out; 3019 } 3020 } 3021 out: 3022 drm_modeset_unlock_crtc(crtc); 3023 3024 return ret; 3025 3026 } 3027 3028 3029 /** 3030 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 3031 * @dev: drm device for the ioctl 3032 * @data: data pointer for the ioctl 3033 * @file_priv: drm file for the ioctl call 3034 * 3035 * Set the cursor configuration based on user request. 3036 * 3037 * Called by the user via ioctl. 3038 * 3039 * Returns: 3040 * Zero on success, negative errno on failure. 3041 */ 3042 int drm_mode_cursor_ioctl(struct drm_device *dev, 3043 void *data, struct drm_file *file_priv) 3044 { 3045 struct drm_mode_cursor *req = data; 3046 struct drm_mode_cursor2 new_req; 3047 3048 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 3049 new_req.hot_x = new_req.hot_y = 0; 3050 3051 return drm_mode_cursor_common(dev, &new_req, file_priv); 3052 } 3053 3054 /** 3055 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 3056 * @dev: drm device for the ioctl 3057 * @data: data pointer for the ioctl 3058 * @file_priv: drm file for the ioctl call 3059 * 3060 * Set the cursor configuration based on user request. This implements the 2nd 3061 * version of the cursor ioctl, which allows userspace to additionally specify 3062 * the hotspot of the pointer. 3063 * 3064 * Called by the user via ioctl. 3065 * 3066 * Returns: 3067 * Zero on success, negative errno on failure. 3068 */ 3069 int drm_mode_cursor2_ioctl(struct drm_device *dev, 3070 void *data, struct drm_file *file_priv) 3071 { 3072 struct drm_mode_cursor2 *req = data; 3073 3074 return drm_mode_cursor_common(dev, req, file_priv); 3075 } 3076 3077 /** 3078 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 3079 * @bpp: bits per pixels 3080 * @depth: bit depth per pixel 3081 * 3082 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 3083 * Useful in fbdev emulation code, since that deals in those values. 3084 */ 3085 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 3086 { 3087 uint32_t fmt; 3088 3089 switch (bpp) { 3090 case 8: 3091 fmt = DRM_FORMAT_C8; 3092 break; 3093 case 16: 3094 if (depth == 15) 3095 fmt = DRM_FORMAT_XRGB1555; 3096 else 3097 fmt = DRM_FORMAT_RGB565; 3098 break; 3099 case 24: 3100 fmt = DRM_FORMAT_RGB888; 3101 break; 3102 case 32: 3103 if (depth == 24) 3104 fmt = DRM_FORMAT_XRGB8888; 3105 else if (depth == 30) 3106 fmt = DRM_FORMAT_XRGB2101010; 3107 else 3108 fmt = DRM_FORMAT_ARGB8888; 3109 break; 3110 default: 3111 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3112 fmt = DRM_FORMAT_XRGB8888; 3113 break; 3114 } 3115 3116 return fmt; 3117 } 3118 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3119 3120 /** 3121 * drm_mode_addfb - add an FB to the graphics configuration 3122 * @dev: drm device for the ioctl 3123 * @data: data pointer for the ioctl 3124 * @file_priv: drm file for the ioctl call 3125 * 3126 * Add a new FB to the specified CRTC, given a user request. This is the 3127 * original addfb ioctl which only supported RGB formats. 3128 * 3129 * Called by the user via ioctl. 3130 * 3131 * Returns: 3132 * Zero on success, negative errno on failure. 3133 */ 3134 int drm_mode_addfb(struct drm_device *dev, 3135 void *data, struct drm_file *file_priv) 3136 { 3137 struct drm_mode_fb_cmd *or = data; 3138 struct drm_mode_fb_cmd2 r = {}; 3139 int ret; 3140 3141 /* convert to new format and call new ioctl */ 3142 r.fb_id = or->fb_id; 3143 r.width = or->width; 3144 r.height = or->height; 3145 r.pitches[0] = or->pitch; 3146 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3147 r.handles[0] = or->handle; 3148 3149 ret = drm_mode_addfb2(dev, &r, file_priv); 3150 if (ret) 3151 return ret; 3152 3153 or->fb_id = r.fb_id; 3154 3155 return ret; 3156 } 3157 3158 static int format_check(const struct drm_mode_fb_cmd2 *r) 3159 { 3160 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3161 3162 switch (format) { 3163 case DRM_FORMAT_C8: 3164 case DRM_FORMAT_RGB332: 3165 case DRM_FORMAT_BGR233: 3166 case DRM_FORMAT_XRGB4444: 3167 case DRM_FORMAT_XBGR4444: 3168 case DRM_FORMAT_RGBX4444: 3169 case DRM_FORMAT_BGRX4444: 3170 case DRM_FORMAT_ARGB4444: 3171 case DRM_FORMAT_ABGR4444: 3172 case DRM_FORMAT_RGBA4444: 3173 case DRM_FORMAT_BGRA4444: 3174 case DRM_FORMAT_XRGB1555: 3175 case DRM_FORMAT_XBGR1555: 3176 case DRM_FORMAT_RGBX5551: 3177 case DRM_FORMAT_BGRX5551: 3178 case DRM_FORMAT_ARGB1555: 3179 case DRM_FORMAT_ABGR1555: 3180 case DRM_FORMAT_RGBA5551: 3181 case DRM_FORMAT_BGRA5551: 3182 case DRM_FORMAT_RGB565: 3183 case DRM_FORMAT_BGR565: 3184 case DRM_FORMAT_RGB888: 3185 case DRM_FORMAT_BGR888: 3186 case DRM_FORMAT_XRGB8888: 3187 case DRM_FORMAT_XBGR8888: 3188 case DRM_FORMAT_RGBX8888: 3189 case DRM_FORMAT_BGRX8888: 3190 case DRM_FORMAT_ARGB8888: 3191 case DRM_FORMAT_ABGR8888: 3192 case DRM_FORMAT_RGBA8888: 3193 case DRM_FORMAT_BGRA8888: 3194 case DRM_FORMAT_XRGB2101010: 3195 case DRM_FORMAT_XBGR2101010: 3196 case DRM_FORMAT_RGBX1010102: 3197 case DRM_FORMAT_BGRX1010102: 3198 case DRM_FORMAT_ARGB2101010: 3199 case DRM_FORMAT_ABGR2101010: 3200 case DRM_FORMAT_RGBA1010102: 3201 case DRM_FORMAT_BGRA1010102: 3202 case DRM_FORMAT_YUYV: 3203 case DRM_FORMAT_YVYU: 3204 case DRM_FORMAT_UYVY: 3205 case DRM_FORMAT_VYUY: 3206 case DRM_FORMAT_AYUV: 3207 case DRM_FORMAT_NV12: 3208 case DRM_FORMAT_NV21: 3209 case DRM_FORMAT_NV16: 3210 case DRM_FORMAT_NV61: 3211 case DRM_FORMAT_NV24: 3212 case DRM_FORMAT_NV42: 3213 case DRM_FORMAT_YUV410: 3214 case DRM_FORMAT_YVU410: 3215 case DRM_FORMAT_YUV411: 3216 case DRM_FORMAT_YVU411: 3217 case DRM_FORMAT_YUV420: 3218 case DRM_FORMAT_YVU420: 3219 case DRM_FORMAT_YUV422: 3220 case DRM_FORMAT_YVU422: 3221 case DRM_FORMAT_YUV444: 3222 case DRM_FORMAT_YVU444: 3223 return 0; 3224 default: 3225 DRM_DEBUG_KMS("invalid pixel format %s\n", 3226 drm_get_format_name(r->pixel_format)); 3227 return -EINVAL; 3228 } 3229 } 3230 3231 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3232 { 3233 int ret, hsub, vsub, num_planes, i; 3234 3235 ret = format_check(r); 3236 if (ret) { 3237 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3238 drm_get_format_name(r->pixel_format)); 3239 return ret; 3240 } 3241 3242 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3243 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3244 num_planes = drm_format_num_planes(r->pixel_format); 3245 3246 if (r->width == 0 || r->width % hsub) { 3247 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3248 return -EINVAL; 3249 } 3250 3251 if (r->height == 0 || r->height % vsub) { 3252 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3253 return -EINVAL; 3254 } 3255 3256 for (i = 0; i < num_planes; i++) { 3257 unsigned int width = r->width / (i != 0 ? hsub : 1); 3258 unsigned int height = r->height / (i != 0 ? vsub : 1); 3259 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3260 3261 if (!r->handles[i]) { 3262 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3263 return -EINVAL; 3264 } 3265 3266 if ((uint64_t) width * cpp > UINT_MAX) 3267 return -ERANGE; 3268 3269 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3270 return -ERANGE; 3271 3272 if (r->pitches[i] < width * cpp) { 3273 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3274 return -EINVAL; 3275 } 3276 3277 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { 3278 DRM_DEBUG_KMS("bad fb modifier %lu for plane %d\n", 3279 r->modifier[i], i); 3280 return -EINVAL; 3281 } 3282 3283 /* modifier specific checks: */ 3284 switch (r->modifier[i]) { 3285 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: 3286 /* NOTE: the pitch restriction may be lifted later if it turns 3287 * out that no hw has this restriction: 3288 */ 3289 if (r->pixel_format != DRM_FORMAT_NV12 || 3290 width % 128 || height % 32 || 3291 r->pitches[i] % 128) { 3292 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i); 3293 return -EINVAL; 3294 } 3295 break; 3296 3297 default: 3298 break; 3299 } 3300 } 3301 3302 for (i = num_planes; i < 4; i++) { 3303 if (r->modifier[i]) { 3304 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i); 3305 return -EINVAL; 3306 } 3307 3308 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ 3309 if (!(r->flags & DRM_MODE_FB_MODIFIERS)) 3310 continue; 3311 3312 if (r->handles[i]) { 3313 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i); 3314 return -EINVAL; 3315 } 3316 3317 if (r->pitches[i]) { 3318 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i); 3319 return -EINVAL; 3320 } 3321 3322 if (r->offsets[i]) { 3323 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i); 3324 return -EINVAL; 3325 } 3326 } 3327 3328 return 0; 3329 } 3330 3331 static struct drm_framebuffer * 3332 internal_framebuffer_create(struct drm_device *dev, 3333 const struct drm_mode_fb_cmd2 *r, 3334 struct drm_file *file_priv) 3335 { 3336 struct drm_mode_config *config = &dev->mode_config; 3337 struct drm_framebuffer *fb; 3338 int ret; 3339 3340 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { 3341 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3342 return ERR_PTR(-EINVAL); 3343 } 3344 3345 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3346 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3347 r->width, config->min_width, config->max_width); 3348 return ERR_PTR(-EINVAL); 3349 } 3350 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3351 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3352 r->height, config->min_height, config->max_height); 3353 return ERR_PTR(-EINVAL); 3354 } 3355 3356 if (r->flags & DRM_MODE_FB_MODIFIERS && 3357 !dev->mode_config.allow_fb_modifiers) { 3358 DRM_DEBUG_KMS("driver does not support fb modifiers\n"); 3359 return ERR_PTR(-EINVAL); 3360 } 3361 3362 ret = framebuffer_check(r); 3363 if (ret) 3364 return ERR_PTR(ret); 3365 3366 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3367 if (IS_ERR(fb)) { 3368 DRM_DEBUG_KMS("could not create framebuffer\n"); 3369 return fb; 3370 } 3371 3372 return fb; 3373 } 3374 3375 /** 3376 * drm_mode_addfb2 - add an FB to the graphics configuration 3377 * @dev: drm device for the ioctl 3378 * @data: data pointer for the ioctl 3379 * @file_priv: drm file for the ioctl call 3380 * 3381 * Add a new FB to the specified CRTC, given a user request with format. This is 3382 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3383 * and uses fourcc codes as pixel format specifiers. 3384 * 3385 * Called by the user via ioctl. 3386 * 3387 * Returns: 3388 * Zero on success, negative errno on failure. 3389 */ 3390 int drm_mode_addfb2(struct drm_device *dev, 3391 void *data, struct drm_file *file_priv) 3392 { 3393 struct drm_mode_fb_cmd2 *r = data; 3394 struct drm_framebuffer *fb; 3395 3396 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3397 return -EINVAL; 3398 3399 fb = internal_framebuffer_create(dev, r, file_priv); 3400 if (IS_ERR(fb)) 3401 return PTR_ERR(fb); 3402 3403 /* Transfer ownership to the filp for reaping on close */ 3404 3405 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3406 mutex_lock(&file_priv->fbs_lock); 3407 r->fb_id = fb->base.id; 3408 list_add(&fb->filp_head, &file_priv->fbs); 3409 mutex_unlock(&file_priv->fbs_lock); 3410 3411 return 0; 3412 } 3413 3414 /** 3415 * drm_mode_rmfb - remove an FB from the configuration 3416 * @dev: drm device for the ioctl 3417 * @data: data pointer for the ioctl 3418 * @file_priv: drm file for the ioctl call 3419 * 3420 * Remove the FB specified by the user. 3421 * 3422 * Called by the user via ioctl. 3423 * 3424 * Returns: 3425 * Zero on success, negative errno on failure. 3426 */ 3427 int drm_mode_rmfb(struct drm_device *dev, 3428 void *data, struct drm_file *file_priv) 3429 { 3430 struct drm_framebuffer *fb = NULL; 3431 struct drm_framebuffer *fbl = NULL; 3432 uint32_t *id = data; 3433 int found = 0; 3434 3435 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3436 return -EINVAL; 3437 3438 mutex_lock(&file_priv->fbs_lock); 3439 mutex_lock(&dev->mode_config.fb_lock); 3440 fb = __drm_framebuffer_lookup(dev, *id); 3441 if (!fb) 3442 goto fail_lookup; 3443 3444 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3445 if (fb == fbl) 3446 found = 1; 3447 if (!found) 3448 goto fail_lookup; 3449 3450 list_del_init(&fb->filp_head); 3451 mutex_unlock(&dev->mode_config.fb_lock); 3452 mutex_unlock(&file_priv->fbs_lock); 3453 3454 drm_framebuffer_unreference(fb); 3455 3456 return 0; 3457 3458 fail_lookup: 3459 mutex_unlock(&dev->mode_config.fb_lock); 3460 mutex_unlock(&file_priv->fbs_lock); 3461 3462 return -ENOENT; 3463 } 3464 3465 /** 3466 * drm_mode_getfb - get FB info 3467 * @dev: drm device for the ioctl 3468 * @data: data pointer for the ioctl 3469 * @file_priv: drm file for the ioctl call 3470 * 3471 * Lookup the FB given its ID and return info about it. 3472 * 3473 * Called by the user via ioctl. 3474 * 3475 * Returns: 3476 * Zero on success, negative errno on failure. 3477 */ 3478 int drm_mode_getfb(struct drm_device *dev, 3479 void *data, struct drm_file *file_priv) 3480 { 3481 struct drm_mode_fb_cmd *r = data; 3482 struct drm_framebuffer *fb; 3483 int ret; 3484 3485 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3486 return -EINVAL; 3487 3488 fb = drm_framebuffer_lookup(dev, r->fb_id); 3489 if (!fb) 3490 return -ENOENT; 3491 3492 r->height = fb->height; 3493 r->width = fb->width; 3494 r->depth = fb->depth; 3495 r->bpp = fb->bits_per_pixel; 3496 r->pitch = fb->pitches[0]; 3497 if (fb->funcs->create_handle) { 3498 ret = fb->funcs->create_handle(fb, file_priv, &r->handle); 3499 } else { 3500 ret = -ENODEV; 3501 } 3502 3503 drm_framebuffer_unreference(fb); 3504 3505 return ret; 3506 } 3507 3508 /** 3509 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3510 * @dev: drm device for the ioctl 3511 * @data: data pointer for the ioctl 3512 * @file_priv: drm file for the ioctl call 3513 * 3514 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3515 * rectangle list. Generic userspace which does frontbuffer rendering must call 3516 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3517 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3518 * 3519 * Modesetting drivers which always update the frontbuffer do not need to 3520 * implement the corresponding ->dirty framebuffer callback. 3521 * 3522 * Called by the user via ioctl. 3523 * 3524 * Returns: 3525 * Zero on success, negative errno on failure. 3526 */ 3527 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3528 void *data, struct drm_file *file_priv) 3529 { 3530 struct drm_clip_rect __user *clips_ptr; 3531 struct drm_clip_rect *clips = NULL; 3532 struct drm_mode_fb_dirty_cmd *r = data; 3533 struct drm_framebuffer *fb; 3534 unsigned flags; 3535 int num_clips; 3536 int ret; 3537 3538 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3539 return -EINVAL; 3540 3541 fb = drm_framebuffer_lookup(dev, r->fb_id); 3542 if (!fb) 3543 return -ENOENT; 3544 3545 num_clips = r->num_clips; 3546 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3547 3548 if (!num_clips != !clips_ptr) { 3549 ret = -EINVAL; 3550 goto out_err1; 3551 } 3552 3553 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3554 3555 /* If userspace annotates copy, clips must come in pairs */ 3556 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3557 ret = -EINVAL; 3558 goto out_err1; 3559 } 3560 3561 if (num_clips && clips_ptr) { 3562 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3563 ret = -EINVAL; 3564 goto out_err1; 3565 } 3566 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); 3567 if (!clips) { 3568 ret = -ENOMEM; 3569 goto out_err1; 3570 } 3571 3572 ret = copy_from_user(clips, clips_ptr, 3573 num_clips * sizeof(*clips)); 3574 if (ret) { 3575 ret = -EFAULT; 3576 goto out_err2; 3577 } 3578 } 3579 3580 if (fb->funcs->dirty) { 3581 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3582 clips, num_clips); 3583 } else { 3584 ret = -ENOSYS; 3585 } 3586 3587 out_err2: 3588 kfree(clips); 3589 out_err1: 3590 drm_framebuffer_unreference(fb); 3591 3592 return ret; 3593 } 3594 3595 3596 /** 3597 * drm_fb_release - remove and free the FBs on this file 3598 * @priv: drm file for the ioctl 3599 * 3600 * Destroy all the FBs associated with @filp. 3601 * 3602 * Called by the user via ioctl. 3603 * 3604 * Returns: 3605 * Zero on success, negative errno on failure. 3606 */ 3607 void drm_fb_release(struct drm_file *priv) 3608 { 3609 struct drm_framebuffer *fb, *tfb; 3610 3611 /* 3612 * When the file gets released that means no one else can access the fb 3613 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3614 * avoid upsetting lockdep since the universal cursor code adds a 3615 * framebuffer while holding mutex locks. 3616 * 3617 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3618 * locks is impossible here since no one else but this function can get 3619 * at it any more. 3620 */ 3621 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3622 list_del_init(&fb->filp_head); 3623 3624 /* This drops the fpriv->fbs reference. */ 3625 drm_framebuffer_unreference(fb); 3626 } 3627 } 3628 3629 /** 3630 * drm_property_create - create a new property type 3631 * @dev: drm device 3632 * @flags: flags specifying the property type 3633 * @name: name of the property 3634 * @num_values: number of pre-defined values 3635 * 3636 * This creates a new generic drm property which can then be attached to a drm 3637 * object with drm_object_attach_property. The returned property object must be 3638 * freed with drm_property_destroy. 3639 * 3640 * Note that the DRM core keeps a per-device list of properties and that, if 3641 * drm_mode_config_cleanup() is called, it will destroy all properties created 3642 * by the driver. 3643 * 3644 * Returns: 3645 * A pointer to the newly created property on success, NULL on failure. 3646 */ 3647 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3648 const char *name, int num_values) 3649 { 3650 struct drm_property *property = NULL; 3651 int ret; 3652 3653 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3654 if (!property) 3655 return NULL; 3656 3657 property->dev = dev; 3658 3659 if (num_values) { 3660 property->values = kcalloc(num_values, sizeof(uint64_t), 3661 GFP_KERNEL); 3662 if (!property->values) 3663 goto fail; 3664 } 3665 3666 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3667 if (ret) 3668 goto fail; 3669 3670 property->flags = flags; 3671 property->num_values = num_values; 3672 INIT_LIST_HEAD(&property->enum_list); 3673 3674 if (name) { 3675 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3676 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3677 } 3678 3679 list_add_tail(&property->head, &dev->mode_config.property_list); 3680 3681 WARN_ON(!drm_property_type_valid(property)); 3682 3683 return property; 3684 fail: 3685 kfree(property->values); 3686 kfree(property); 3687 return NULL; 3688 } 3689 EXPORT_SYMBOL(drm_property_create); 3690 3691 /** 3692 * drm_property_create_enum - create a new enumeration property type 3693 * @dev: drm device 3694 * @flags: flags specifying the property type 3695 * @name: name of the property 3696 * @props: enumeration lists with property values 3697 * @num_values: number of pre-defined values 3698 * 3699 * This creates a new generic drm property which can then be attached to a drm 3700 * object with drm_object_attach_property. The returned property object must be 3701 * freed with drm_property_destroy. 3702 * 3703 * Userspace is only allowed to set one of the predefined values for enumeration 3704 * properties. 3705 * 3706 * Returns: 3707 * A pointer to the newly created property on success, NULL on failure. 3708 */ 3709 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3710 const char *name, 3711 const struct drm_prop_enum_list *props, 3712 int num_values) 3713 { 3714 struct drm_property *property; 3715 int i, ret; 3716 3717 flags |= DRM_MODE_PROP_ENUM; 3718 3719 property = drm_property_create(dev, flags, name, num_values); 3720 if (!property) 3721 return NULL; 3722 3723 for (i = 0; i < num_values; i++) { 3724 ret = drm_property_add_enum(property, i, 3725 props[i].type, 3726 props[i].name); 3727 if (ret) { 3728 drm_property_destroy(dev, property); 3729 return NULL; 3730 } 3731 } 3732 3733 return property; 3734 } 3735 EXPORT_SYMBOL(drm_property_create_enum); 3736 3737 /** 3738 * drm_property_create_bitmask - create a new bitmask property type 3739 * @dev: drm device 3740 * @flags: flags specifying the property type 3741 * @name: name of the property 3742 * @props: enumeration lists with property bitflags 3743 * @num_props: size of the @props array 3744 * @supported_bits: bitmask of all supported enumeration values 3745 * 3746 * This creates a new bitmask drm property which can then be attached to a drm 3747 * object with drm_object_attach_property. The returned property object must be 3748 * freed with drm_property_destroy. 3749 * 3750 * Compared to plain enumeration properties userspace is allowed to set any 3751 * or'ed together combination of the predefined property bitflag values 3752 * 3753 * Returns: 3754 * A pointer to the newly created property on success, NULL on failure. 3755 */ 3756 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3757 int flags, const char *name, 3758 const struct drm_prop_enum_list *props, 3759 int num_props, 3760 uint64_t supported_bits) 3761 { 3762 struct drm_property *property; 3763 int i, ret, index = 0; 3764 int num_values = hweight64(supported_bits); 3765 3766 flags |= DRM_MODE_PROP_BITMASK; 3767 3768 property = drm_property_create(dev, flags, name, num_values); 3769 if (!property) 3770 return NULL; 3771 for (i = 0; i < num_props; i++) { 3772 if (!(supported_bits & (1ULL << props[i].type))) 3773 continue; 3774 3775 if (WARN_ON(index >= num_values)) { 3776 drm_property_destroy(dev, property); 3777 return NULL; 3778 } 3779 3780 ret = drm_property_add_enum(property, index++, 3781 props[i].type, 3782 props[i].name); 3783 if (ret) { 3784 drm_property_destroy(dev, property); 3785 return NULL; 3786 } 3787 } 3788 3789 return property; 3790 } 3791 EXPORT_SYMBOL(drm_property_create_bitmask); 3792 3793 static struct drm_property *property_create_range(struct drm_device *dev, 3794 int flags, const char *name, 3795 uint64_t min, uint64_t max) 3796 { 3797 struct drm_property *property; 3798 3799 property = drm_property_create(dev, flags, name, 2); 3800 if (!property) 3801 return NULL; 3802 3803 property->values[0] = min; 3804 property->values[1] = max; 3805 3806 return property; 3807 } 3808 3809 /** 3810 * drm_property_create_range - create a new unsigned ranged property type 3811 * @dev: drm device 3812 * @flags: flags specifying the property type 3813 * @name: name of the property 3814 * @min: minimum value of the property 3815 * @max: maximum value of the property 3816 * 3817 * This creates a new generic drm property which can then be attached to a drm 3818 * object with drm_object_attach_property. The returned property object must be 3819 * freed with drm_property_destroy. 3820 * 3821 * Userspace is allowed to set any unsigned integer value in the (min, max) 3822 * range inclusive. 3823 * 3824 * Returns: 3825 * A pointer to the newly created property on success, NULL on failure. 3826 */ 3827 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3828 const char *name, 3829 uint64_t min, uint64_t max) 3830 { 3831 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3832 name, min, max); 3833 } 3834 EXPORT_SYMBOL(drm_property_create_range); 3835 3836 /** 3837 * drm_property_create_signed_range - create a new signed ranged property type 3838 * @dev: drm device 3839 * @flags: flags specifying the property type 3840 * @name: name of the property 3841 * @min: minimum value of the property 3842 * @max: maximum value of the property 3843 * 3844 * This creates a new generic drm property which can then be attached to a drm 3845 * object with drm_object_attach_property. The returned property object must be 3846 * freed with drm_property_destroy. 3847 * 3848 * Userspace is allowed to set any signed integer value in the (min, max) 3849 * range inclusive. 3850 * 3851 * Returns: 3852 * A pointer to the newly created property on success, NULL on failure. 3853 */ 3854 struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3855 int flags, const char *name, 3856 int64_t min, int64_t max) 3857 { 3858 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3859 name, I642U64(min), I642U64(max)); 3860 } 3861 EXPORT_SYMBOL(drm_property_create_signed_range); 3862 3863 /** 3864 * drm_property_create_object - create a new object property type 3865 * @dev: drm device 3866 * @flags: flags specifying the property type 3867 * @name: name of the property 3868 * @type: object type from DRM_MODE_OBJECT_* defines 3869 * 3870 * This creates a new generic drm property which can then be attached to a drm 3871 * object with drm_object_attach_property. The returned property object must be 3872 * freed with drm_property_destroy. 3873 * 3874 * Userspace is only allowed to set this to any property value of the given 3875 * @type. Only useful for atomic properties, which is enforced. 3876 * 3877 * Returns: 3878 * A pointer to the newly created property on success, NULL on failure. 3879 */ 3880 struct drm_property *drm_property_create_object(struct drm_device *dev, 3881 int flags, const char *name, uint32_t type) 3882 { 3883 struct drm_property *property; 3884 3885 flags |= DRM_MODE_PROP_OBJECT; 3886 3887 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) 3888 return NULL; 3889 3890 property = drm_property_create(dev, flags, name, 1); 3891 if (!property) 3892 return NULL; 3893 3894 property->values[0] = type; 3895 3896 return property; 3897 } 3898 EXPORT_SYMBOL(drm_property_create_object); 3899 3900 /** 3901 * drm_property_create_bool - create a new boolean property type 3902 * @dev: drm device 3903 * @flags: flags specifying the property type 3904 * @name: name of the property 3905 * 3906 * This creates a new generic drm property which can then be attached to a drm 3907 * object with drm_object_attach_property. The returned property object must be 3908 * freed with drm_property_destroy. 3909 * 3910 * This is implemented as a ranged property with only {0, 1} as valid values. 3911 * 3912 * Returns: 3913 * A pointer to the newly created property on success, NULL on failure. 3914 */ 3915 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, 3916 const char *name) 3917 { 3918 return drm_property_create_range(dev, flags, name, 0, 1); 3919 } 3920 EXPORT_SYMBOL(drm_property_create_bool); 3921 3922 /** 3923 * drm_property_add_enum - add a possible value to an enumeration property 3924 * @property: enumeration property to change 3925 * @index: index of the new enumeration 3926 * @value: value of the new enumeration 3927 * @name: symbolic name of the new enumeration 3928 * 3929 * This functions adds enumerations to a property. 3930 * 3931 * It's use is deprecated, drivers should use one of the more specific helpers 3932 * to directly create the property with all enumerations already attached. 3933 * 3934 * Returns: 3935 * Zero on success, error code on failure. 3936 */ 3937 int drm_property_add_enum(struct drm_property *property, int index, 3938 uint64_t value, const char *name) 3939 { 3940 struct drm_property_enum *prop_enum; 3941 3942 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3943 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3944 return -EINVAL; 3945 3946 /* 3947 * Bitmask enum properties have the additional constraint of values 3948 * from 0 to 63 3949 */ 3950 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3951 (value > 63)) 3952 return -EINVAL; 3953 3954 if (!list_empty(&property->enum_list)) { 3955 list_for_each_entry(prop_enum, &property->enum_list, head) { 3956 if (prop_enum->value == value) { 3957 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3958 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3959 return 0; 3960 } 3961 } 3962 } 3963 3964 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3965 if (!prop_enum) 3966 return -ENOMEM; 3967 3968 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3969 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3970 prop_enum->value = value; 3971 3972 property->values[index] = value; 3973 list_add_tail(&prop_enum->head, &property->enum_list); 3974 return 0; 3975 } 3976 EXPORT_SYMBOL(drm_property_add_enum); 3977 3978 /** 3979 * drm_property_destroy - destroy a drm property 3980 * @dev: drm device 3981 * @property: property to destry 3982 * 3983 * This function frees a property including any attached resources like 3984 * enumeration values. 3985 */ 3986 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 3987 { 3988 struct drm_property_enum *prop_enum, *pt; 3989 3990 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 3991 list_del(&prop_enum->head); 3992 kfree(prop_enum); 3993 } 3994 3995 if (property->num_values) 3996 kfree(property->values); 3997 drm_mode_object_put(dev, &property->base); 3998 list_del(&property->head); 3999 kfree(property); 4000 } 4001 EXPORT_SYMBOL(drm_property_destroy); 4002 4003 /** 4004 * drm_object_attach_property - attach a property to a modeset object 4005 * @obj: drm modeset object 4006 * @property: property to attach 4007 * @init_val: initial value of the property 4008 * 4009 * This attaches the given property to the modeset object with the given initial 4010 * value. Currently this function cannot fail since the properties are stored in 4011 * a statically sized array. 4012 */ 4013 void drm_object_attach_property(struct drm_mode_object *obj, 4014 struct drm_property *property, 4015 uint64_t init_val) 4016 { 4017 int count = obj->properties->count; 4018 4019 if (count == DRM_OBJECT_MAX_PROPERTY) { 4020 WARN(1, "Failed to attach object property (type: 0x%x). Please " 4021 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 4022 "you see this message on the same object type.\n", 4023 obj->type); 4024 return; 4025 } 4026 4027 obj->properties->properties[count] = property; 4028 obj->properties->values[count] = init_val; 4029 obj->properties->count++; 4030 if (property->flags & DRM_MODE_PROP_ATOMIC) 4031 obj->properties->atomic_count++; 4032 } 4033 EXPORT_SYMBOL(drm_object_attach_property); 4034 4035 /** 4036 * drm_object_property_set_value - set the value of a property 4037 * @obj: drm mode object to set property value for 4038 * @property: property to set 4039 * @val: value the property should be set to 4040 * 4041 * This functions sets a given property on a given object. This function only 4042 * changes the software state of the property, it does not call into the 4043 * driver's ->set_property callback. 4044 * 4045 * Returns: 4046 * Zero on success, error code on failure. 4047 */ 4048 int drm_object_property_set_value(struct drm_mode_object *obj, 4049 struct drm_property *property, uint64_t val) 4050 { 4051 int i; 4052 4053 for (i = 0; i < obj->properties->count; i++) { 4054 if (obj->properties->properties[i] == property) { 4055 obj->properties->values[i] = val; 4056 return 0; 4057 } 4058 } 4059 4060 return -EINVAL; 4061 } 4062 EXPORT_SYMBOL(drm_object_property_set_value); 4063 4064 /** 4065 * drm_object_property_get_value - retrieve the value of a property 4066 * @obj: drm mode object to get property value from 4067 * @property: property to retrieve 4068 * @val: storage for the property value 4069 * 4070 * This function retrieves the softare state of the given property for the given 4071 * property. Since there is no driver callback to retrieve the current property 4072 * value this might be out of sync with the hardware, depending upon the driver 4073 * and property. 4074 * 4075 * Returns: 4076 * Zero on success, error code on failure. 4077 */ 4078 int drm_object_property_get_value(struct drm_mode_object *obj, 4079 struct drm_property *property, uint64_t *val) 4080 { 4081 int i; 4082 4083 /* read-only properties bypass atomic mechanism and still store 4084 * their value in obj->properties->values[].. mostly to avoid 4085 * having to deal w/ EDID and similar props in atomic paths: 4086 */ 4087 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && 4088 !(property->flags & DRM_MODE_PROP_IMMUTABLE)) 4089 return drm_atomic_get_property(obj, property, val); 4090 4091 for (i = 0; i < obj->properties->count; i++) { 4092 if (obj->properties->properties[i] == property) { 4093 *val = obj->properties->values[i]; 4094 return 0; 4095 } 4096 } 4097 4098 return -EINVAL; 4099 } 4100 EXPORT_SYMBOL(drm_object_property_get_value); 4101 4102 /** 4103 * drm_mode_getproperty_ioctl - get the property metadata 4104 * @dev: DRM device 4105 * @data: ioctl data 4106 * @file_priv: DRM file info 4107 * 4108 * This function retrieves the metadata for a given property, like the different 4109 * possible values for an enum property or the limits for a range property. 4110 * 4111 * Blob properties are special 4112 * 4113 * Called by the user via ioctl. 4114 * 4115 * Returns: 4116 * Zero on success, negative errno on failure. 4117 */ 4118 int drm_mode_getproperty_ioctl(struct drm_device *dev, 4119 void *data, struct drm_file *file_priv) 4120 { 4121 struct drm_mode_get_property *out_resp = data; 4122 struct drm_property *property; 4123 int enum_count = 0; 4124 int value_count = 0; 4125 int ret = 0, i; 4126 int copied; 4127 struct drm_property_enum *prop_enum; 4128 struct drm_mode_property_enum __user *enum_ptr; 4129 uint64_t __user *values_ptr; 4130 4131 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4132 return -EINVAL; 4133 4134 drm_modeset_lock_all(dev); 4135 property = drm_property_find(dev, out_resp->prop_id); 4136 if (!property) { 4137 ret = -ENOENT; 4138 goto done; 4139 } 4140 4141 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4142 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4143 list_for_each_entry(prop_enum, &property->enum_list, head) 4144 enum_count++; 4145 } 4146 4147 value_count = property->num_values; 4148 4149 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 4150 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 4151 out_resp->flags = property->flags; 4152 4153 if ((out_resp->count_values >= value_count) && value_count) { 4154 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 4155 for (i = 0; i < value_count; i++) { 4156 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 4157 ret = -EFAULT; 4158 goto done; 4159 } 4160 } 4161 } 4162 out_resp->count_values = value_count; 4163 4164 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4165 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4166 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 4167 copied = 0; 4168 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 4169 list_for_each_entry(prop_enum, &property->enum_list, head) { 4170 4171 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 4172 ret = -EFAULT; 4173 goto done; 4174 } 4175 4176 if (copy_to_user(&enum_ptr[copied].name, 4177 &prop_enum->name, DRM_PROP_NAME_LEN)) { 4178 ret = -EFAULT; 4179 goto done; 4180 } 4181 copied++; 4182 } 4183 } 4184 out_resp->count_enum_blobs = enum_count; 4185 } 4186 4187 /* 4188 * NOTE: The idea seems to have been to use this to read all the blob 4189 * property values. But nothing ever added them to the corresponding 4190 * list, userspace always used the special-purpose get_blob ioctl to 4191 * read the value for a blob property. It also doesn't make a lot of 4192 * sense to return values here when everything else is just metadata for 4193 * the property itself. 4194 */ 4195 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4196 out_resp->count_enum_blobs = 0; 4197 done: 4198 drm_modeset_unlock_all(dev); 4199 return ret; 4200 } 4201 4202 /** 4203 * drm_property_create_blob - Create new blob property 4204 * 4205 * Creates a new blob property for a specified DRM device, optionally 4206 * copying data. 4207 * 4208 * @dev: DRM device to create property for 4209 * @length: Length to allocate for blob data 4210 * @data: If specified, copies data into blob 4211 * 4212 * Returns: 4213 * New blob property with a single reference on success, or an ERR_PTR 4214 * value on failure. 4215 */ 4216 struct drm_property_blob * 4217 drm_property_create_blob(struct drm_device *dev, size_t length, 4218 const void *data) 4219 { 4220 struct drm_property_blob *blob; 4221 int ret; 4222 4223 if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob)) 4224 return ERR_PTR(-EINVAL); 4225 4226 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4227 if (!blob) 4228 return ERR_PTR(-ENOMEM); 4229 4230 /* This must be explicitly initialised, so we can safely call list_del 4231 * on it in the removal handler, even if it isn't in a file list. */ 4232 INIT_LIST_HEAD(&blob->head_file); 4233 blob->length = length; 4234 blob->dev = dev; 4235 4236 if (data) 4237 memcpy(blob->data, data, length); 4238 4239 mutex_lock(&dev->mode_config.blob_lock); 4240 4241 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 4242 if (ret) { 4243 kfree(blob); 4244 mutex_unlock(&dev->mode_config.blob_lock); 4245 return ERR_PTR(-EINVAL); 4246 } 4247 4248 kref_init(&blob->refcount); 4249 4250 list_add_tail(&blob->head_global, 4251 &dev->mode_config.property_blob_list); 4252 4253 mutex_unlock(&dev->mode_config.blob_lock); 4254 4255 return blob; 4256 } 4257 EXPORT_SYMBOL(drm_property_create_blob); 4258 4259 /** 4260 * drm_property_free_blob - Blob property destructor 4261 * 4262 * Internal free function for blob properties; must not be used directly. 4263 * 4264 * @kref: Reference 4265 */ 4266 static void drm_property_free_blob(struct kref *kref) 4267 { 4268 struct drm_property_blob *blob = 4269 container_of(kref, struct drm_property_blob, refcount); 4270 4271 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock)); 4272 4273 list_del(&blob->head_global); 4274 list_del(&blob->head_file); 4275 drm_mode_object_put(blob->dev, &blob->base); 4276 4277 kfree(blob); 4278 } 4279 4280 /** 4281 * drm_property_unreference_blob - Unreference a blob property 4282 * 4283 * Drop a reference on a blob property. May free the object. 4284 * 4285 * @blob: Pointer to blob property 4286 */ 4287 void drm_property_unreference_blob(struct drm_property_blob *blob) 4288 { 4289 struct drm_device *dev; 4290 4291 if (!blob) 4292 return; 4293 4294 dev = blob->dev; 4295 4296 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4297 4298 if (kref_put_mutex(&blob->refcount, drm_property_free_blob, 4299 &dev->mode_config.blob_lock)) 4300 mutex_unlock(&dev->mode_config.blob_lock); 4301 else 4302 might_lock(&dev->mode_config.blob_lock); 4303 } 4304 EXPORT_SYMBOL(drm_property_unreference_blob); 4305 4306 /** 4307 * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held 4308 * 4309 * Drop a reference on a blob property. May free the object. This must be 4310 * called with blob_lock held. 4311 * 4312 * @blob: Pointer to blob property 4313 */ 4314 static void drm_property_unreference_blob_locked(struct drm_property_blob *blob) 4315 { 4316 if (!blob) 4317 return; 4318 4319 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4320 4321 kref_put(&blob->refcount, drm_property_free_blob); 4322 } 4323 4324 /** 4325 * drm_property_destroy_user_blobs - destroy all blobs created by this client 4326 * @dev: DRM device 4327 * @file_priv: destroy all blobs owned by this file handle 4328 */ 4329 void drm_property_destroy_user_blobs(struct drm_device *dev, 4330 struct drm_file *file_priv) 4331 { 4332 struct drm_property_blob *blob, *bt; 4333 4334 mutex_lock(&dev->mode_config.blob_lock); 4335 4336 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) { 4337 list_del_init(&blob->head_file); 4338 drm_property_unreference_blob_locked(blob); 4339 } 4340 4341 mutex_unlock(&dev->mode_config.blob_lock); 4342 } 4343 4344 /** 4345 * drm_property_reference_blob - Take a reference on an existing property 4346 * 4347 * Take a new reference on an existing blob property. 4348 * 4349 * @blob: Pointer to blob property 4350 */ 4351 struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob) 4352 { 4353 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4354 kref_get(&blob->refcount); 4355 return blob; 4356 } 4357 EXPORT_SYMBOL(drm_property_reference_blob); 4358 4359 /* 4360 * Like drm_property_lookup_blob, but does not return an additional reference. 4361 * Must be called with blob_lock held. 4362 */ 4363 static struct drm_property_blob *__drm_property_lookup_blob(struct drm_device *dev, 4364 uint32_t id) 4365 { 4366 struct drm_mode_object *obj = NULL; 4367 struct drm_property_blob *blob; 4368 4369 WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock)); 4370 4371 mutex_lock(&dev->mode_config.idr_mutex); 4372 obj = idr_find(&dev->mode_config.crtc_idr, id); 4373 if (!obj || (obj->type != DRM_MODE_OBJECT_BLOB) || (obj->id != id)) 4374 blob = NULL; 4375 else 4376 blob = obj_to_blob(obj); 4377 mutex_unlock(&dev->mode_config.idr_mutex); 4378 4379 return blob; 4380 } 4381 4382 /** 4383 * drm_property_lookup_blob - look up a blob property and take a reference 4384 * @dev: drm device 4385 * @id: id of the blob property 4386 * 4387 * If successful, this takes an additional reference to the blob property. 4388 * callers need to make sure to eventually unreference the returned property 4389 * again, using @drm_property_unreference_blob. 4390 */ 4391 struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev, 4392 uint32_t id) 4393 { 4394 struct drm_property_blob *blob; 4395 4396 mutex_lock(&dev->mode_config.blob_lock); 4397 blob = __drm_property_lookup_blob(dev, id); 4398 if (blob) { 4399 if (!kref_get_unless_zero(&blob->refcount)) 4400 blob = NULL; 4401 } 4402 mutex_unlock(&dev->mode_config.blob_lock); 4403 4404 return blob; 4405 } 4406 EXPORT_SYMBOL(drm_property_lookup_blob); 4407 4408 /** 4409 * drm_property_replace_global_blob - atomically replace existing blob property 4410 * @dev: drm device 4411 * @replace: location of blob property pointer to be replaced 4412 * @length: length of data for new blob, or 0 for no data 4413 * @data: content for new blob, or NULL for no data 4414 * @obj_holds_id: optional object for property holding blob ID 4415 * @prop_holds_id: optional property holding blob ID 4416 * @return 0 on success or error on failure 4417 * 4418 * This function will atomically replace a global property in the blob list, 4419 * optionally updating a property which holds the ID of that property. It is 4420 * guaranteed to be atomic: no caller will be allowed to see intermediate 4421 * results, and either the entire operation will succeed and clean up the 4422 * previous property, or it will fail and the state will be unchanged. 4423 * 4424 * If length is 0 or data is NULL, no new blob will be created, and the holding 4425 * property, if specified, will be set to 0. 4426 * 4427 * Access to the replace pointer is assumed to be protected by the caller, e.g. 4428 * by holding the relevant modesetting object lock for its parent. 4429 * 4430 * For example, a drm_connector has a 'PATH' property, which contains the ID 4431 * of a blob property with the value of the MST path information. Calling this 4432 * function with replace pointing to the connector's path_blob_ptr, length and 4433 * data set for the new path information, obj_holds_id set to the connector's 4434 * base object, and prop_holds_id set to the path property name, will perform 4435 * a completely atomic update. The access to path_blob_ptr is protected by the 4436 * caller holding a lock on the connector. 4437 */ 4438 static int drm_property_replace_global_blob(struct drm_device *dev, 4439 struct drm_property_blob **replace, 4440 size_t length, 4441 const void *data, 4442 struct drm_mode_object *obj_holds_id, 4443 struct drm_property *prop_holds_id) 4444 { 4445 struct drm_property_blob *new_blob = NULL; 4446 struct drm_property_blob *old_blob = NULL; 4447 int ret; 4448 4449 WARN_ON(replace == NULL); 4450 4451 old_blob = *replace; 4452 4453 if (length && data) { 4454 new_blob = drm_property_create_blob(dev, length, data); 4455 if (IS_ERR(new_blob)) 4456 return PTR_ERR(new_blob); 4457 } 4458 4459 /* This does not need to be synchronised with blob_lock, as the 4460 * get_properties ioctl locks all modesetting objects, and 4461 * obj_holds_id must be locked before calling here, so we cannot 4462 * have its value out of sync with the list membership modified 4463 * below under blob_lock. */ 4464 if (obj_holds_id) { 4465 ret = drm_object_property_set_value(obj_holds_id, 4466 prop_holds_id, 4467 new_blob ? 4468 new_blob->base.id : 0); 4469 if (ret != 0) 4470 goto err_created; 4471 } 4472 4473 drm_property_unreference_blob(old_blob); 4474 *replace = new_blob; 4475 4476 return 0; 4477 4478 err_created: 4479 drm_property_unreference_blob(new_blob); 4480 return ret; 4481 } 4482 4483 /** 4484 * drm_mode_getblob_ioctl - get the contents of a blob property value 4485 * @dev: DRM device 4486 * @data: ioctl data 4487 * @file_priv: DRM file info 4488 * 4489 * This function retrieves the contents of a blob property. The value stored in 4490 * an object's blob property is just a normal modeset object id. 4491 * 4492 * Called by the user via ioctl. 4493 * 4494 * Returns: 4495 * Zero on success, negative errno on failure. 4496 */ 4497 int drm_mode_getblob_ioctl(struct drm_device *dev, 4498 void *data, struct drm_file *file_priv) 4499 { 4500 struct drm_mode_get_blob *out_resp = data; 4501 struct drm_property_blob *blob; 4502 int ret = 0; 4503 void __user *blob_ptr; 4504 4505 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4506 return -EINVAL; 4507 4508 drm_modeset_lock_all(dev); 4509 mutex_lock(&dev->mode_config.blob_lock); 4510 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4511 if (!blob) { 4512 ret = -ENOENT; 4513 goto done; 4514 } 4515 4516 if (out_resp->length == blob->length) { 4517 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4518 if (copy_to_user(blob_ptr, blob->data, blob->length)) { 4519 ret = -EFAULT; 4520 goto done; 4521 } 4522 } 4523 out_resp->length = blob->length; 4524 4525 done: 4526 mutex_unlock(&dev->mode_config.blob_lock); 4527 drm_modeset_unlock_all(dev); 4528 return ret; 4529 } 4530 4531 /** 4532 * drm_mode_createblob_ioctl - create a new blob property 4533 * @dev: DRM device 4534 * @data: ioctl data 4535 * @file_priv: DRM file info 4536 * 4537 * This function creates a new blob property with user-defined values. In order 4538 * to give us sensible validation and checking when creating, rather than at 4539 * every potential use, we also require a type to be provided upfront. 4540 * 4541 * Called by the user via ioctl. 4542 * 4543 * Returns: 4544 * Zero on success, negative errno on failure. 4545 */ 4546 int drm_mode_createblob_ioctl(struct drm_device *dev, 4547 void *data, struct drm_file *file_priv) 4548 { 4549 struct drm_mode_create_blob *out_resp = data; 4550 struct drm_property_blob *blob; 4551 void __user *blob_ptr; 4552 int ret = 0; 4553 4554 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4555 return -EINVAL; 4556 4557 blob = drm_property_create_blob(dev, out_resp->length, NULL); 4558 if (IS_ERR(blob)) 4559 return PTR_ERR(blob); 4560 4561 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4562 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) { 4563 ret = -EFAULT; 4564 goto out_blob; 4565 } 4566 4567 /* Dropping the lock between create_blob and our access here is safe 4568 * as only the same file_priv can remove the blob; at this point, it is 4569 * not associated with any file_priv. */ 4570 mutex_lock(&dev->mode_config.blob_lock); 4571 out_resp->blob_id = blob->base.id; 4572 list_add_tail(&blob->head_file, &file_priv->blobs); 4573 mutex_unlock(&dev->mode_config.blob_lock); 4574 4575 return 0; 4576 4577 out_blob: 4578 drm_property_unreference_blob(blob); 4579 return ret; 4580 } 4581 4582 /** 4583 * drm_mode_destroyblob_ioctl - destroy a user blob property 4584 * @dev: DRM device 4585 * @data: ioctl data 4586 * @file_priv: DRM file info 4587 * 4588 * Destroy an existing user-defined blob property. 4589 * 4590 * Called by the user via ioctl. 4591 * 4592 * Returns: 4593 * Zero on success, negative errno on failure. 4594 */ 4595 int drm_mode_destroyblob_ioctl(struct drm_device *dev, 4596 void *data, struct drm_file *file_priv) 4597 { 4598 struct drm_mode_destroy_blob *out_resp = data; 4599 struct drm_property_blob *blob = NULL, *bt; 4600 bool found = false; 4601 int ret = 0; 4602 4603 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4604 return -EINVAL; 4605 4606 mutex_lock(&dev->mode_config.blob_lock); 4607 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4608 if (!blob) { 4609 ret = -ENOENT; 4610 goto err; 4611 } 4612 4613 /* Ensure the property was actually created by this user. */ 4614 list_for_each_entry(bt, &file_priv->blobs, head_file) { 4615 if (bt == blob) { 4616 found = true; 4617 break; 4618 } 4619 } 4620 4621 if (!found) { 4622 ret = -EPERM; 4623 goto err; 4624 } 4625 4626 /* We must drop head_file here, because we may not be the last 4627 * reference on the blob. */ 4628 list_del_init(&blob->head_file); 4629 drm_property_unreference_blob_locked(blob); 4630 mutex_unlock(&dev->mode_config.blob_lock); 4631 4632 return 0; 4633 4634 err: 4635 mutex_unlock(&dev->mode_config.blob_lock); 4636 return ret; 4637 } 4638 4639 /** 4640 * drm_mode_connector_set_path_property - set tile property on connector 4641 * @connector: connector to set property on. 4642 * @path: path to use for property; must not be NULL. 4643 * 4644 * This creates a property to expose to userspace to specify a 4645 * connector path. This is mainly used for DisplayPort MST where 4646 * connectors have a topology and we want to allow userspace to give 4647 * them more meaningful names. 4648 * 4649 * Returns: 4650 * Zero on success, negative errno on failure. 4651 */ 4652 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4653 const char *path) 4654 { 4655 struct drm_device *dev = connector->dev; 4656 int ret; 4657 4658 ret = drm_property_replace_global_blob(dev, 4659 &connector->path_blob_ptr, 4660 strlen(path) + 1, 4661 path, 4662 &connector->base, 4663 dev->mode_config.path_property); 4664 return ret; 4665 } 4666 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4667 4668 /** 4669 * drm_mode_connector_set_tile_property - set tile property on connector 4670 * @connector: connector to set property on. 4671 * 4672 * This looks up the tile information for a connector, and creates a 4673 * property for userspace to parse if it exists. The property is of 4674 * the form of 8 integers using ':' as a separator. 4675 * 4676 * Returns: 4677 * Zero on success, errno on failure. 4678 */ 4679 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4680 { 4681 struct drm_device *dev = connector->dev; 4682 char tile[256]; 4683 int ret; 4684 4685 if (!connector->has_tile) { 4686 ret = drm_property_replace_global_blob(dev, 4687 &connector->tile_blob_ptr, 4688 0, 4689 NULL, 4690 &connector->base, 4691 dev->mode_config.tile_property); 4692 return ret; 4693 } 4694 4695 ksnprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4696 connector->tile_group->id, connector->tile_is_single_monitor, 4697 connector->num_h_tile, connector->num_v_tile, 4698 connector->tile_h_loc, connector->tile_v_loc, 4699 connector->tile_h_size, connector->tile_v_size); 4700 4701 ret = drm_property_replace_global_blob(dev, 4702 &connector->tile_blob_ptr, 4703 strlen(tile) + 1, 4704 tile, 4705 &connector->base, 4706 dev->mode_config.tile_property); 4707 return ret; 4708 } 4709 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4710 4711 /** 4712 * drm_mode_connector_update_edid_property - update the edid property of a connector 4713 * @connector: drm connector 4714 * @edid: new value of the edid property 4715 * 4716 * This function creates a new blob modeset object and assigns its id to the 4717 * connector's edid property. 4718 * 4719 * Returns: 4720 * Zero on success, negative errno on failure. 4721 */ 4722 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4723 const struct edid *edid) 4724 { 4725 struct drm_device *dev = connector->dev; 4726 size_t size = 0; 4727 int ret; 4728 4729 /* ignore requests to set edid when overridden */ 4730 if (connector->override_edid) 4731 return 0; 4732 4733 if (edid) 4734 size = EDID_LENGTH * (1 + edid->extensions); 4735 4736 ret = drm_property_replace_global_blob(dev, 4737 &connector->edid_blob_ptr, 4738 size, 4739 edid, 4740 &connector->base, 4741 dev->mode_config.edid_property); 4742 return ret; 4743 } 4744 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4745 4746 /* Some properties could refer to dynamic refcnt'd objects, or things that 4747 * need special locking to handle lifetime issues (ie. to ensure the prop 4748 * value doesn't become invalid part way through the property update due to 4749 * race). The value returned by reference via 'obj' should be passed back 4750 * to drm_property_change_valid_put() after the property is set (and the 4751 * object to which the property is attached has a chance to take it's own 4752 * reference). 4753 */ 4754 bool drm_property_change_valid_get(struct drm_property *property, 4755 uint64_t value, struct drm_mode_object **ref) 4756 { 4757 int i; 4758 4759 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4760 return false; 4761 4762 *ref = NULL; 4763 4764 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4765 if (value < property->values[0] || value > property->values[1]) 4766 return false; 4767 return true; 4768 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4769 int64_t svalue = U642I64(value); 4770 4771 if (svalue < U642I64(property->values[0]) || 4772 svalue > U642I64(property->values[1])) 4773 return false; 4774 return true; 4775 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4776 uint64_t valid_mask = 0; 4777 4778 for (i = 0; i < property->num_values; i++) 4779 valid_mask |= (1ULL << property->values[i]); 4780 return !(value & ~valid_mask); 4781 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4782 struct drm_property_blob *blob; 4783 4784 if (value == 0) 4785 return true; 4786 4787 blob = drm_property_lookup_blob(property->dev, value); 4788 if (blob) { 4789 *ref = &blob->base; 4790 return true; 4791 } else { 4792 return false; 4793 } 4794 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4795 /* a zero value for an object property translates to null: */ 4796 if (value == 0) 4797 return true; 4798 4799 /* handle refcnt'd objects specially: */ 4800 if (property->values[0] == DRM_MODE_OBJECT_FB) { 4801 struct drm_framebuffer *fb; 4802 fb = drm_framebuffer_lookup(property->dev, value); 4803 if (fb) { 4804 *ref = &fb->base; 4805 return true; 4806 } else { 4807 return false; 4808 } 4809 } else { 4810 return _object_find(property->dev, value, property->values[0]) != NULL; 4811 } 4812 } 4813 4814 for (i = 0; i < property->num_values; i++) 4815 if (property->values[i] == value) 4816 return true; 4817 return false; 4818 } 4819 4820 void drm_property_change_valid_put(struct drm_property *property, 4821 struct drm_mode_object *ref) 4822 { 4823 if (!ref) 4824 return; 4825 4826 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4827 if (property->values[0] == DRM_MODE_OBJECT_FB) 4828 drm_framebuffer_unreference(obj_to_fb(ref)); 4829 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4830 drm_property_unreference_blob(obj_to_blob(ref)); 4831 } 4832 4833 /** 4834 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4835 * @dev: DRM device 4836 * @data: ioctl data 4837 * @file_priv: DRM file info 4838 * 4839 * This function sets the current value for a connectors's property. It also 4840 * calls into a driver's ->set_property callback to update the hardware state 4841 * 4842 * Called by the user via ioctl. 4843 * 4844 * Returns: 4845 * Zero on success, negative errno on failure. 4846 */ 4847 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4848 void *data, struct drm_file *file_priv) 4849 { 4850 struct drm_mode_connector_set_property *conn_set_prop = data; 4851 struct drm_mode_obj_set_property obj_set_prop = { 4852 .value = conn_set_prop->value, 4853 .prop_id = conn_set_prop->prop_id, 4854 .obj_id = conn_set_prop->connector_id, 4855 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4856 }; 4857 4858 /* It does all the locking and checking we need */ 4859 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4860 } 4861 4862 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4863 struct drm_property *property, 4864 uint64_t value) 4865 { 4866 int ret = -EINVAL; 4867 struct drm_connector *connector = obj_to_connector(obj); 4868 4869 /* Do DPMS ourselves */ 4870 if (property == connector->dev->mode_config.dpms_property) { 4871 ret = (*connector->funcs->dpms)(connector, (int)value); 4872 } else if (connector->funcs->set_property) 4873 ret = connector->funcs->set_property(connector, property, value); 4874 4875 /* store the property value if successful */ 4876 if (!ret) 4877 drm_object_property_set_value(&connector->base, property, value); 4878 return ret; 4879 } 4880 4881 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4882 struct drm_property *property, 4883 uint64_t value) 4884 { 4885 int ret = -EINVAL; 4886 struct drm_crtc *crtc = obj_to_crtc(obj); 4887 4888 if (crtc->funcs->set_property) 4889 ret = crtc->funcs->set_property(crtc, property, value); 4890 if (!ret) 4891 drm_object_property_set_value(obj, property, value); 4892 4893 return ret; 4894 } 4895 4896 /** 4897 * drm_mode_plane_set_obj_prop - set the value of a property 4898 * @plane: drm plane object to set property value for 4899 * @property: property to set 4900 * @value: value the property should be set to 4901 * 4902 * This functions sets a given property on a given plane object. This function 4903 * calls the driver's ->set_property callback and changes the software state of 4904 * the property if the callback succeeds. 4905 * 4906 * Returns: 4907 * Zero on success, error code on failure. 4908 */ 4909 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4910 struct drm_property *property, 4911 uint64_t value) 4912 { 4913 int ret = -EINVAL; 4914 struct drm_mode_object *obj = &plane->base; 4915 4916 if (plane->funcs->set_property) 4917 ret = plane->funcs->set_property(plane, property, value); 4918 if (!ret) 4919 drm_object_property_set_value(obj, property, value); 4920 4921 return ret; 4922 } 4923 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4924 4925 /** 4926 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 4927 * @dev: DRM device 4928 * @data: ioctl data 4929 * @file_priv: DRM file info 4930 * 4931 * This function retrieves the current value for an object's property. Compared 4932 * to the connector specific ioctl this one is extended to also work on crtc and 4933 * plane objects. 4934 * 4935 * Called by the user via ioctl. 4936 * 4937 * Returns: 4938 * Zero on success, negative errno on failure. 4939 */ 4940 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4941 struct drm_file *file_priv) 4942 { 4943 struct drm_mode_obj_get_properties *arg = data; 4944 struct drm_mode_object *obj; 4945 int ret = 0; 4946 4947 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4948 return -EINVAL; 4949 4950 drm_modeset_lock_all(dev); 4951 4952 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4953 if (!obj) { 4954 ret = -ENOENT; 4955 goto out; 4956 } 4957 if (!obj->properties) { 4958 ret = -EINVAL; 4959 goto out; 4960 } 4961 4962 ret = get_properties(obj, file_priv->atomic, 4963 (uint32_t __user *)(unsigned long)(arg->props_ptr), 4964 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), 4965 &arg->count_props); 4966 4967 out: 4968 drm_modeset_unlock_all(dev); 4969 return ret; 4970 } 4971 4972 /** 4973 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 4974 * @dev: DRM device 4975 * @data: ioctl data 4976 * @file_priv: DRM file info 4977 * 4978 * This function sets the current value for an object's property. It also calls 4979 * into a driver's ->set_property callback to update the hardware state. 4980 * Compared to the connector specific ioctl this one is extended to also work on 4981 * crtc and plane objects. 4982 * 4983 * Called by the user via ioctl. 4984 * 4985 * Returns: 4986 * Zero on success, negative errno on failure. 4987 */ 4988 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 4989 struct drm_file *file_priv) 4990 { 4991 struct drm_mode_obj_set_property *arg = data; 4992 struct drm_mode_object *arg_obj; 4993 struct drm_mode_object *prop_obj; 4994 struct drm_property *property; 4995 int i, ret = -EINVAL; 4996 struct drm_mode_object *ref; 4997 4998 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4999 return -EINVAL; 5000 5001 drm_modeset_lock_all(dev); 5002 5003 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 5004 if (!arg_obj) { 5005 ret = -ENOENT; 5006 goto out; 5007 } 5008 if (!arg_obj->properties) 5009 goto out; 5010 5011 for (i = 0; i < arg_obj->properties->count; i++) 5012 if (arg_obj->properties->properties[i]->base.id == arg->prop_id) 5013 break; 5014 5015 if (i == arg_obj->properties->count) 5016 goto out; 5017 5018 prop_obj = drm_mode_object_find(dev, arg->prop_id, 5019 DRM_MODE_OBJECT_PROPERTY); 5020 if (!prop_obj) { 5021 ret = -ENOENT; 5022 goto out; 5023 } 5024 property = obj_to_property(prop_obj); 5025 5026 if (!drm_property_change_valid_get(property, arg->value, &ref)) 5027 goto out; 5028 5029 switch (arg_obj->type) { 5030 case DRM_MODE_OBJECT_CONNECTOR: 5031 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 5032 arg->value); 5033 break; 5034 case DRM_MODE_OBJECT_CRTC: 5035 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 5036 break; 5037 case DRM_MODE_OBJECT_PLANE: 5038 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 5039 property, arg->value); 5040 break; 5041 } 5042 5043 drm_property_change_valid_put(property, ref); 5044 5045 out: 5046 drm_modeset_unlock_all(dev); 5047 return ret; 5048 } 5049 5050 /** 5051 * drm_mode_connector_attach_encoder - attach a connector to an encoder 5052 * @connector: connector to attach 5053 * @encoder: encoder to attach @connector to 5054 * 5055 * This function links up a connector to an encoder. Note that the routing 5056 * restrictions between encoders and crtcs are exposed to userspace through the 5057 * possible_clones and possible_crtcs bitmasks. 5058 * 5059 * Returns: 5060 * Zero on success, negative errno on failure. 5061 */ 5062 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 5063 struct drm_encoder *encoder) 5064 { 5065 int i; 5066 5067 /* 5068 * In the past, drivers have attempted to model the static association 5069 * of connector to encoder in simple connector/encoder devices using a 5070 * direct assignment of connector->encoder = encoder. This connection 5071 * is a logical one and the responsibility of the core, so drivers are 5072 * expected not to mess with this. 5073 * 5074 * Note that the error return should've been enough here, but a large 5075 * majority of drivers ignores the return value, so add in a big WARN 5076 * to get people's attention. 5077 */ 5078 if (WARN_ON(connector->encoder)) 5079 return -EINVAL; 5080 5081 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 5082 if (connector->encoder_ids[i] == 0) { 5083 connector->encoder_ids[i] = encoder->base.id; 5084 return 0; 5085 } 5086 } 5087 return -ENOMEM; 5088 } 5089 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 5090 5091 /** 5092 * drm_mode_crtc_set_gamma_size - set the gamma table size 5093 * @crtc: CRTC to set the gamma table size for 5094 * @gamma_size: size of the gamma table 5095 * 5096 * Drivers which support gamma tables should set this to the supported gamma 5097 * table size when initializing the CRTC. Currently the drm core only supports a 5098 * fixed gamma table size. 5099 * 5100 * Returns: 5101 * Zero on success, negative errno on failure. 5102 */ 5103 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 5104 int gamma_size) 5105 { 5106 crtc->gamma_size = gamma_size; 5107 5108 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, 5109 GFP_KERNEL); 5110 if (!crtc->gamma_store) { 5111 crtc->gamma_size = 0; 5112 return -ENOMEM; 5113 } 5114 5115 return 0; 5116 } 5117 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 5118 5119 /** 5120 * drm_mode_gamma_set_ioctl - set the gamma table 5121 * @dev: DRM device 5122 * @data: ioctl data 5123 * @file_priv: DRM file info 5124 * 5125 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 5126 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 5127 * 5128 * Called by the user via ioctl. 5129 * 5130 * Returns: 5131 * Zero on success, negative errno on failure. 5132 */ 5133 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 5134 void *data, struct drm_file *file_priv) 5135 { 5136 struct drm_mode_crtc_lut *crtc_lut = data; 5137 struct drm_crtc *crtc; 5138 void *r_base, *g_base, *b_base; 5139 int size; 5140 int ret = 0; 5141 5142 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5143 return -EINVAL; 5144 5145 drm_modeset_lock_all(dev); 5146 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5147 if (!crtc) { 5148 ret = -ENOENT; 5149 goto out; 5150 } 5151 5152 if (crtc->funcs->gamma_set == NULL) { 5153 ret = -ENOSYS; 5154 goto out; 5155 } 5156 5157 /* memcpy into gamma store */ 5158 if (crtc_lut->gamma_size != crtc->gamma_size) { 5159 ret = -EINVAL; 5160 goto out; 5161 } 5162 5163 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5164 r_base = crtc->gamma_store; 5165 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 5166 ret = -EFAULT; 5167 goto out; 5168 } 5169 5170 g_base = (char *)r_base + size; 5171 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 5172 ret = -EFAULT; 5173 goto out; 5174 } 5175 5176 b_base = (char *)g_base + size; 5177 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 5178 ret = -EFAULT; 5179 goto out; 5180 } 5181 5182 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 5183 5184 out: 5185 drm_modeset_unlock_all(dev); 5186 return ret; 5187 5188 } 5189 5190 /** 5191 * drm_mode_gamma_get_ioctl - get the gamma table 5192 * @dev: DRM device 5193 * @data: ioctl data 5194 * @file_priv: DRM file info 5195 * 5196 * Copy the current gamma table into the storage provided. This also provides 5197 * the gamma table size the driver expects, which can be used to size the 5198 * allocated storage. 5199 * 5200 * Called by the user via ioctl. 5201 * 5202 * Returns: 5203 * Zero on success, negative errno on failure. 5204 */ 5205 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 5206 void *data, struct drm_file *file_priv) 5207 { 5208 struct drm_mode_crtc_lut *crtc_lut = data; 5209 struct drm_crtc *crtc; 5210 void *r_base, *g_base, *b_base; 5211 int size; 5212 int ret = 0; 5213 5214 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5215 return -EINVAL; 5216 5217 drm_modeset_lock_all(dev); 5218 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5219 if (!crtc) { 5220 ret = -ENOENT; 5221 goto out; 5222 } 5223 5224 /* memcpy into gamma store */ 5225 if (crtc_lut->gamma_size != crtc->gamma_size) { 5226 ret = -EINVAL; 5227 goto out; 5228 } 5229 5230 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5231 r_base = crtc->gamma_store; 5232 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 5233 ret = -EFAULT; 5234 goto out; 5235 } 5236 5237 g_base = (char *)r_base + size; 5238 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 5239 ret = -EFAULT; 5240 goto out; 5241 } 5242 5243 b_base = (char *)g_base + size; 5244 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 5245 ret = -EFAULT; 5246 goto out; 5247 } 5248 out: 5249 drm_modeset_unlock_all(dev); 5250 return ret; 5251 } 5252 5253 /** 5254 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 5255 * @dev: DRM device 5256 * @data: ioctl data 5257 * @file_priv: DRM file info 5258 * 5259 * This schedules an asynchronous update on a given CRTC, called page flip. 5260 * Optionally a drm event is generated to signal the completion of the event. 5261 * Generic drivers cannot assume that a pageflip with changed framebuffer 5262 * properties (including driver specific metadata like tiling layout) will work, 5263 * but some drivers support e.g. pixel format changes through the pageflip 5264 * ioctl. 5265 * 5266 * Called by the user via ioctl. 5267 * 5268 * Returns: 5269 * Zero on success, negative errno on failure. 5270 */ 5271 int drm_mode_page_flip_ioctl(struct drm_device *dev, 5272 void *data, struct drm_file *file_priv) 5273 { 5274 struct drm_mode_crtc_page_flip *page_flip = data; 5275 struct drm_crtc *crtc; 5276 struct drm_framebuffer *fb = NULL; 5277 struct drm_pending_vblank_event *e = NULL; 5278 int ret = -EINVAL; 5279 5280 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 5281 page_flip->reserved != 0) 5282 return -EINVAL; 5283 5284 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 5285 return -EINVAL; 5286 5287 crtc = drm_crtc_find(dev, page_flip->crtc_id); 5288 if (!crtc) 5289 return -ENOENT; 5290 5291 drm_modeset_lock_crtc(crtc, crtc->primary); 5292 if (crtc->primary->fb == NULL) { 5293 /* The framebuffer is currently unbound, presumably 5294 * due to a hotplug event, that userspace has not 5295 * yet discovered. 5296 */ 5297 ret = -EBUSY; 5298 goto out; 5299 } 5300 5301 if (crtc->funcs->page_flip == NULL) 5302 goto out; 5303 5304 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 5305 if (!fb) { 5306 ret = -ENOENT; 5307 goto out; 5308 } 5309 5310 if (crtc->state) { 5311 const struct drm_plane_state *state = crtc->primary->state; 5312 5313 ret = check_src_coords(state->src_x, state->src_y, 5314 state->src_w, state->src_h, fb); 5315 } else { 5316 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 5317 } 5318 if (ret) 5319 goto out; 5320 5321 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 5322 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 5323 ret = -EINVAL; 5324 goto out; 5325 } 5326 5327 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5328 e = kzalloc(sizeof *e, GFP_KERNEL); 5329 if (!e) { 5330 ret = -ENOMEM; 5331 goto out; 5332 } 5333 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 5334 e->event.base.length = sizeof(e->event); 5335 e->event.user_data = page_flip->user_data; 5336 ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base); 5337 if (ret) { 5338 kfree(e); 5339 goto out; 5340 } 5341 } 5342 5343 crtc->primary->old_fb = crtc->primary->fb; 5344 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 5345 if (ret) { 5346 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) 5347 drm_event_cancel_free(dev, &e->base); 5348 /* Keep the old fb, don't unref it. */ 5349 crtc->primary->old_fb = NULL; 5350 } else { 5351 crtc->primary->fb = fb; 5352 /* Unref only the old framebuffer. */ 5353 fb = NULL; 5354 } 5355 5356 out: 5357 if (fb) 5358 drm_framebuffer_unreference(fb); 5359 if (crtc->primary->old_fb) 5360 drm_framebuffer_unreference(crtc->primary->old_fb); 5361 crtc->primary->old_fb = NULL; 5362 drm_modeset_unlock_crtc(crtc); 5363 5364 return ret; 5365 } 5366 5367 /** 5368 * drm_mode_config_reset - call ->reset callbacks 5369 * @dev: drm device 5370 * 5371 * This functions calls all the crtc's, encoder's and connector's ->reset 5372 * callback. Drivers can use this in e.g. their driver load or resume code to 5373 * reset hardware and software state. 5374 */ 5375 void drm_mode_config_reset(struct drm_device *dev) 5376 { 5377 struct drm_crtc *crtc; 5378 struct drm_plane *plane; 5379 struct drm_encoder *encoder; 5380 struct drm_connector *connector; 5381 5382 drm_for_each_plane(plane, dev) 5383 if (plane->funcs->reset) 5384 plane->funcs->reset(plane); 5385 5386 drm_for_each_crtc(crtc, dev) 5387 if (crtc->funcs->reset) 5388 crtc->funcs->reset(crtc); 5389 5390 drm_for_each_encoder(encoder, dev) 5391 if (encoder->funcs->reset) 5392 encoder->funcs->reset(encoder); 5393 5394 mutex_lock(&dev->mode_config.mutex); 5395 drm_for_each_connector(connector, dev) { 5396 connector->status = connector_status_unknown; 5397 5398 if (connector->funcs->reset) 5399 connector->funcs->reset(connector); 5400 } 5401 mutex_unlock(&dev->mode_config.mutex); 5402 } 5403 EXPORT_SYMBOL(drm_mode_config_reset); 5404 5405 /** 5406 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 5407 * @dev: DRM device 5408 * @data: ioctl data 5409 * @file_priv: DRM file info 5410 * 5411 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 5412 * TTM or something else entirely) and returns the resulting buffer handle. This 5413 * handle can then be wrapped up into a framebuffer modeset object. 5414 * 5415 * Note that userspace is not allowed to use such objects for render 5416 * acceleration - drivers must create their own private ioctls for such a use 5417 * case. 5418 * 5419 * Called by the user via ioctl. 5420 * 5421 * Returns: 5422 * Zero on success, negative errno on failure. 5423 */ 5424 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 5425 void *data, struct drm_file *file_priv) 5426 { 5427 struct drm_mode_create_dumb *args = data; 5428 u32 cpp, stride, size; 5429 5430 if (!dev->driver->dumb_create) 5431 return -ENOSYS; 5432 if (!args->width || !args->height || !args->bpp) 5433 return -EINVAL; 5434 5435 /* overflow checks for 32bit size calculations */ 5436 /* NOTE: DIV_ROUND_UP() can overflow */ 5437 cpp = DIV_ROUND_UP(args->bpp, 8); 5438 if (!cpp || cpp > 0xffffffffU / args->width) 5439 return -EINVAL; 5440 stride = cpp * args->width; 5441 if (args->height > 0xffffffffU / stride) 5442 return -EINVAL; 5443 5444 /* test for wrap-around */ 5445 size = args->height * stride; 5446 if (PAGE_ALIGN(size) == 0) 5447 return -EINVAL; 5448 5449 /* 5450 * handle, pitch and size are output parameters. Zero them out to 5451 * prevent drivers from accidentally using uninitialized data. Since 5452 * not all existing userspace is clearing these fields properly we 5453 * cannot reject IOCTL with garbage in them. 5454 */ 5455 args->handle = 0; 5456 args->pitch = 0; 5457 args->size = 0; 5458 5459 return dev->driver->dumb_create(file_priv, dev, args); 5460 } 5461 5462 /** 5463 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 5464 * @dev: DRM device 5465 * @data: ioctl data 5466 * @file_priv: DRM file info 5467 * 5468 * Allocate an offset in the drm device node's address space to be able to 5469 * memory map a dumb buffer. 5470 * 5471 * Called by the user via ioctl. 5472 * 5473 * Returns: 5474 * Zero on success, negative errno on failure. 5475 */ 5476 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 5477 void *data, struct drm_file *file_priv) 5478 { 5479 struct drm_mode_map_dumb *args = data; 5480 5481 /* call driver ioctl to get mmap offset */ 5482 if (!dev->driver->dumb_map_offset) 5483 return -ENOSYS; 5484 5485 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 5486 } 5487 5488 /** 5489 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 5490 * @dev: DRM device 5491 * @data: ioctl data 5492 * @file_priv: DRM file info 5493 * 5494 * This destroys the userspace handle for the given dumb backing storage buffer. 5495 * Since buffer objects must be reference counted in the kernel a buffer object 5496 * won't be immediately freed if a framebuffer modeset object still uses it. 5497 * 5498 * Called by the user via ioctl. 5499 * 5500 * Returns: 5501 * Zero on success, negative errno on failure. 5502 */ 5503 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 5504 void *data, struct drm_file *file_priv) 5505 { 5506 struct drm_mode_destroy_dumb *args = data; 5507 5508 if (!dev->driver->dumb_destroy) 5509 return -ENOSYS; 5510 5511 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 5512 } 5513 5514 /** 5515 * drm_fb_get_bpp_depth - get the bpp/depth values for format 5516 * @format: pixel format (DRM_FORMAT_*) 5517 * @depth: storage for the depth value 5518 * @bpp: storage for the bpp value 5519 * 5520 * This only supports RGB formats here for compat with code that doesn't use 5521 * pixel formats directly yet. 5522 */ 5523 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 5524 int *bpp) 5525 { 5526 switch (format) { 5527 case DRM_FORMAT_C8: 5528 case DRM_FORMAT_RGB332: 5529 case DRM_FORMAT_BGR233: 5530 *depth = 8; 5531 *bpp = 8; 5532 break; 5533 case DRM_FORMAT_XRGB1555: 5534 case DRM_FORMAT_XBGR1555: 5535 case DRM_FORMAT_RGBX5551: 5536 case DRM_FORMAT_BGRX5551: 5537 case DRM_FORMAT_ARGB1555: 5538 case DRM_FORMAT_ABGR1555: 5539 case DRM_FORMAT_RGBA5551: 5540 case DRM_FORMAT_BGRA5551: 5541 *depth = 15; 5542 *bpp = 16; 5543 break; 5544 case DRM_FORMAT_RGB565: 5545 case DRM_FORMAT_BGR565: 5546 *depth = 16; 5547 *bpp = 16; 5548 break; 5549 case DRM_FORMAT_RGB888: 5550 case DRM_FORMAT_BGR888: 5551 *depth = 24; 5552 *bpp = 24; 5553 break; 5554 case DRM_FORMAT_XRGB8888: 5555 case DRM_FORMAT_XBGR8888: 5556 case DRM_FORMAT_RGBX8888: 5557 case DRM_FORMAT_BGRX8888: 5558 *depth = 24; 5559 *bpp = 32; 5560 break; 5561 case DRM_FORMAT_XRGB2101010: 5562 case DRM_FORMAT_XBGR2101010: 5563 case DRM_FORMAT_RGBX1010102: 5564 case DRM_FORMAT_BGRX1010102: 5565 case DRM_FORMAT_ARGB2101010: 5566 case DRM_FORMAT_ABGR2101010: 5567 case DRM_FORMAT_RGBA1010102: 5568 case DRM_FORMAT_BGRA1010102: 5569 *depth = 30; 5570 *bpp = 32; 5571 break; 5572 case DRM_FORMAT_ARGB8888: 5573 case DRM_FORMAT_ABGR8888: 5574 case DRM_FORMAT_RGBA8888: 5575 case DRM_FORMAT_BGRA8888: 5576 *depth = 32; 5577 *bpp = 32; 5578 break; 5579 default: 5580 DRM_DEBUG_KMS("unsupported pixel format %s\n", 5581 drm_get_format_name(format)); 5582 *depth = 0; 5583 *bpp = 0; 5584 break; 5585 } 5586 } 5587 EXPORT_SYMBOL(drm_fb_get_bpp_depth); 5588 5589 /** 5590 * drm_format_num_planes - get the number of planes for format 5591 * @format: pixel format (DRM_FORMAT_*) 5592 * 5593 * Returns: 5594 * The number of planes used by the specified pixel format. 5595 */ 5596 int drm_format_num_planes(uint32_t format) 5597 { 5598 switch (format) { 5599 case DRM_FORMAT_YUV410: 5600 case DRM_FORMAT_YVU410: 5601 case DRM_FORMAT_YUV411: 5602 case DRM_FORMAT_YVU411: 5603 case DRM_FORMAT_YUV420: 5604 case DRM_FORMAT_YVU420: 5605 case DRM_FORMAT_YUV422: 5606 case DRM_FORMAT_YVU422: 5607 case DRM_FORMAT_YUV444: 5608 case DRM_FORMAT_YVU444: 5609 return 3; 5610 case DRM_FORMAT_NV12: 5611 case DRM_FORMAT_NV21: 5612 case DRM_FORMAT_NV16: 5613 case DRM_FORMAT_NV61: 5614 case DRM_FORMAT_NV24: 5615 case DRM_FORMAT_NV42: 5616 return 2; 5617 default: 5618 return 1; 5619 } 5620 } 5621 EXPORT_SYMBOL(drm_format_num_planes); 5622 5623 /** 5624 * drm_format_plane_cpp - determine the bytes per pixel value 5625 * @format: pixel format (DRM_FORMAT_*) 5626 * @plane: plane index 5627 * 5628 * Returns: 5629 * The bytes per pixel value for the specified plane. 5630 */ 5631 int drm_format_plane_cpp(uint32_t format, int plane) 5632 { 5633 unsigned int depth; 5634 int bpp; 5635 5636 if (plane >= drm_format_num_planes(format)) 5637 return 0; 5638 5639 switch (format) { 5640 case DRM_FORMAT_YUYV: 5641 case DRM_FORMAT_YVYU: 5642 case DRM_FORMAT_UYVY: 5643 case DRM_FORMAT_VYUY: 5644 return 2; 5645 case DRM_FORMAT_NV12: 5646 case DRM_FORMAT_NV21: 5647 case DRM_FORMAT_NV16: 5648 case DRM_FORMAT_NV61: 5649 case DRM_FORMAT_NV24: 5650 case DRM_FORMAT_NV42: 5651 return plane ? 2 : 1; 5652 case DRM_FORMAT_YUV410: 5653 case DRM_FORMAT_YVU410: 5654 case DRM_FORMAT_YUV411: 5655 case DRM_FORMAT_YVU411: 5656 case DRM_FORMAT_YUV420: 5657 case DRM_FORMAT_YVU420: 5658 case DRM_FORMAT_YUV422: 5659 case DRM_FORMAT_YVU422: 5660 case DRM_FORMAT_YUV444: 5661 case DRM_FORMAT_YVU444: 5662 return 1; 5663 default: 5664 drm_fb_get_bpp_depth(format, &depth, &bpp); 5665 return bpp >> 3; 5666 } 5667 } 5668 EXPORT_SYMBOL(drm_format_plane_cpp); 5669 5670 /** 5671 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 5672 * @format: pixel format (DRM_FORMAT_*) 5673 * 5674 * Returns: 5675 * The horizontal chroma subsampling factor for the 5676 * specified pixel format. 5677 */ 5678 int drm_format_horz_chroma_subsampling(uint32_t format) 5679 { 5680 switch (format) { 5681 case DRM_FORMAT_YUV411: 5682 case DRM_FORMAT_YVU411: 5683 case DRM_FORMAT_YUV410: 5684 case DRM_FORMAT_YVU410: 5685 return 4; 5686 case DRM_FORMAT_YUYV: 5687 case DRM_FORMAT_YVYU: 5688 case DRM_FORMAT_UYVY: 5689 case DRM_FORMAT_VYUY: 5690 case DRM_FORMAT_NV12: 5691 case DRM_FORMAT_NV21: 5692 case DRM_FORMAT_NV16: 5693 case DRM_FORMAT_NV61: 5694 case DRM_FORMAT_YUV422: 5695 case DRM_FORMAT_YVU422: 5696 case DRM_FORMAT_YUV420: 5697 case DRM_FORMAT_YVU420: 5698 return 2; 5699 default: 5700 return 1; 5701 } 5702 } 5703 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5704 5705 /** 5706 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5707 * @format: pixel format (DRM_FORMAT_*) 5708 * 5709 * Returns: 5710 * The vertical chroma subsampling factor for the 5711 * specified pixel format. 5712 */ 5713 int drm_format_vert_chroma_subsampling(uint32_t format) 5714 { 5715 switch (format) { 5716 case DRM_FORMAT_YUV410: 5717 case DRM_FORMAT_YVU410: 5718 return 4; 5719 case DRM_FORMAT_YUV420: 5720 case DRM_FORMAT_YVU420: 5721 case DRM_FORMAT_NV12: 5722 case DRM_FORMAT_NV21: 5723 return 2; 5724 default: 5725 return 1; 5726 } 5727 } 5728 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5729 5730 /** 5731 * drm_format_plane_width - width of the plane given the first plane 5732 * @width: width of the first plane 5733 * @format: pixel format 5734 * @plane: plane index 5735 * 5736 * Returns: 5737 * The width of @plane, given that the width of the first plane is @width. 5738 */ 5739 int drm_format_plane_width(int width, uint32_t format, int plane) 5740 { 5741 if (plane >= drm_format_num_planes(format)) 5742 return 0; 5743 5744 if (plane == 0) 5745 return width; 5746 5747 return width / drm_format_horz_chroma_subsampling(format); 5748 } 5749 EXPORT_SYMBOL(drm_format_plane_width); 5750 5751 /** 5752 * drm_format_plane_height - height of the plane given the first plane 5753 * @height: height of the first plane 5754 * @format: pixel format 5755 * @plane: plane index 5756 * 5757 * Returns: 5758 * The height of @plane, given that the height of the first plane is @height. 5759 */ 5760 int drm_format_plane_height(int height, uint32_t format, int plane) 5761 { 5762 if (plane >= drm_format_num_planes(format)) 5763 return 0; 5764 5765 if (plane == 0) 5766 return height; 5767 5768 return height / drm_format_vert_chroma_subsampling(format); 5769 } 5770 EXPORT_SYMBOL(drm_format_plane_height); 5771 5772 /** 5773 * drm_rotation_simplify() - Try to simplify the rotation 5774 * @rotation: Rotation to be simplified 5775 * @supported_rotations: Supported rotations 5776 * 5777 * Attempt to simplify the rotation to a form that is supported. 5778 * Eg. if the hardware supports everything except DRM_REFLECT_X 5779 * one could call this function like this: 5780 * 5781 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5782 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5783 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5784 * 5785 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5786 * transforms the hardware supports, this function may not 5787 * be able to produce a supported transform, so the caller should 5788 * check the result afterwards. 5789 */ 5790 unsigned int drm_rotation_simplify(unsigned int rotation, 5791 unsigned int supported_rotations) 5792 { 5793 if (rotation & ~supported_rotations) { 5794 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5795 rotation = (rotation & DRM_REFLECT_MASK) | 5796 BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4); 5797 } 5798 5799 return rotation; 5800 } 5801 EXPORT_SYMBOL(drm_rotation_simplify); 5802 5803 /** 5804 * drm_mode_config_init - initialize DRM mode_configuration structure 5805 * @dev: DRM device 5806 * 5807 * Initialize @dev's mode_config structure, used for tracking the graphics 5808 * configuration of @dev. 5809 * 5810 * Since this initializes the modeset locks, no locking is possible. Which is no 5811 * problem, since this should happen single threaded at init time. It is the 5812 * driver's problem to ensure this guarantee. 5813 * 5814 */ 5815 void drm_mode_config_init(struct drm_device *dev) 5816 { 5817 lockinit(&dev->mode_config.mutex, "drmmcm", 0, LK_CANRECURSE); 5818 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5819 lockinit(&dev->mode_config.idr_mutex, "mcfgidr", 0, LK_CANRECURSE); 5820 lockinit(&dev->mode_config.fb_lock, "drmfbl", 0, LK_CANRECURSE); 5821 lockinit(&dev->mode_config.blob_lock, "drmcbl", 0, LK_CANRECURSE); 5822 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5823 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5824 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5825 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5826 INIT_LIST_HEAD(&dev->mode_config.property_list); 5827 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5828 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5829 idr_init(&dev->mode_config.crtc_idr); 5830 idr_init(&dev->mode_config.tile_idr); 5831 5832 drm_modeset_lock_all(dev); 5833 drm_mode_create_standard_properties(dev); 5834 drm_modeset_unlock_all(dev); 5835 5836 /* Just to be sure */ 5837 dev->mode_config.num_fb = 0; 5838 dev->mode_config.num_connector = 0; 5839 dev->mode_config.num_crtc = 0; 5840 dev->mode_config.num_encoder = 0; 5841 dev->mode_config.num_overlay_plane = 0; 5842 dev->mode_config.num_total_plane = 0; 5843 } 5844 EXPORT_SYMBOL(drm_mode_config_init); 5845 5846 /** 5847 * drm_mode_config_cleanup - free up DRM mode_config info 5848 * @dev: DRM device 5849 * 5850 * Free up all the connectors and CRTCs associated with this DRM device, then 5851 * free up the framebuffers and associated buffer objects. 5852 * 5853 * Note that since this /should/ happen single-threaded at driver/device 5854 * teardown time, no locking is required. It's the driver's job to ensure that 5855 * this guarantee actually holds true. 5856 * 5857 * FIXME: cleanup any dangling user buffer objects too 5858 */ 5859 void drm_mode_config_cleanup(struct drm_device *dev) 5860 { 5861 struct drm_connector *connector, *ot; 5862 struct drm_crtc *crtc, *ct; 5863 struct drm_encoder *encoder, *enct; 5864 struct drm_framebuffer *fb, *fbt; 5865 struct drm_property *property, *pt; 5866 struct drm_property_blob *blob, *bt; 5867 struct drm_plane *plane, *plt; 5868 5869 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5870 head) { 5871 encoder->funcs->destroy(encoder); 5872 } 5873 5874 list_for_each_entry_safe(connector, ot, 5875 &dev->mode_config.connector_list, head) { 5876 connector->funcs->destroy(connector); 5877 } 5878 5879 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5880 head) { 5881 drm_property_destroy(dev, property); 5882 } 5883 5884 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5885 head_global) { 5886 drm_property_unreference_blob(blob); 5887 } 5888 5889 /* 5890 * Single-threaded teardown context, so it's not required to grab the 5891 * fb_lock to protect against concurrent fb_list access. Contrary, it 5892 * would actually deadlock with the drm_framebuffer_cleanup function. 5893 * 5894 * Also, if there are any framebuffers left, that's a driver leak now, 5895 * so politely WARN about this. 5896 */ 5897 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5898 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5899 drm_framebuffer_free(&fb->refcount); 5900 } 5901 5902 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5903 head) { 5904 plane->funcs->destroy(plane); 5905 } 5906 5907 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5908 crtc->funcs->destroy(crtc); 5909 } 5910 5911 idr_destroy(&dev->mode_config.tile_idr); 5912 idr_destroy(&dev->mode_config.crtc_idr); 5913 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5914 } 5915 EXPORT_SYMBOL(drm_mode_config_cleanup); 5916 5917 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5918 unsigned int supported_rotations) 5919 { 5920 static const struct drm_prop_enum_list props[] = { 5921 { DRM_ROTATE_0, "rotate-0" }, 5922 { DRM_ROTATE_90, "rotate-90" }, 5923 { DRM_ROTATE_180, "rotate-180" }, 5924 { DRM_ROTATE_270, "rotate-270" }, 5925 { DRM_REFLECT_X, "reflect-x" }, 5926 { DRM_REFLECT_Y, "reflect-y" }, 5927 }; 5928 5929 return drm_property_create_bitmask(dev, 0, "rotation", 5930 props, ARRAY_SIZE(props), 5931 supported_rotations); 5932 } 5933 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5934 5935 /** 5936 * DOC: Tile group 5937 * 5938 * Tile groups are used to represent tiled monitors with a unique 5939 * integer identifier. Tiled monitors using DisplayID v1.3 have 5940 * a unique 8-byte handle, we store this in a tile group, so we 5941 * have a common identifier for all tiles in a monitor group. 5942 */ 5943 static void drm_tile_group_free(struct kref *kref) 5944 { 5945 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5946 struct drm_device *dev = tg->dev; 5947 mutex_lock(&dev->mode_config.idr_mutex); 5948 idr_remove(&dev->mode_config.tile_idr, tg->id); 5949 mutex_unlock(&dev->mode_config.idr_mutex); 5950 kfree(tg); 5951 } 5952 5953 /** 5954 * drm_mode_put_tile_group - drop a reference to a tile group. 5955 * @dev: DRM device 5956 * @tg: tile group to drop reference to. 5957 * 5958 * drop reference to tile group and free if 0. 5959 */ 5960 void drm_mode_put_tile_group(struct drm_device *dev, 5961 struct drm_tile_group *tg) 5962 { 5963 kref_put(&tg->refcount, drm_tile_group_free); 5964 } 5965 5966 /** 5967 * drm_mode_get_tile_group - get a reference to an existing tile group 5968 * @dev: DRM device 5969 * @topology: 8-bytes unique per monitor. 5970 * 5971 * Use the unique bytes to get a reference to an existing tile group. 5972 * 5973 * RETURNS: 5974 * tile group or NULL if not found. 5975 */ 5976 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 5977 char topology[8]) 5978 { 5979 #if 0 5980 struct drm_tile_group *tg; 5981 int id; 5982 mutex_lock(&dev->mode_config.idr_mutex); 5983 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 5984 if (!memcmp(tg->group_data, topology, 8)) { 5985 if (!kref_get_unless_zero(&tg->refcount)) 5986 tg = NULL; 5987 mutex_unlock(&dev->mode_config.idr_mutex); 5988 return tg; 5989 } 5990 } 5991 mutex_unlock(&dev->mode_config.idr_mutex); 5992 #endif 5993 return NULL; 5994 } 5995 EXPORT_SYMBOL(drm_mode_get_tile_group); 5996 5997 /** 5998 * drm_mode_create_tile_group - create a tile group from a displayid description 5999 * @dev: DRM device 6000 * @topology: 8-bytes unique per monitor. 6001 * 6002 * Create a tile group for the unique monitor, and get a unique 6003 * identifier for the tile group. 6004 * 6005 * RETURNS: 6006 * new tile group or error. 6007 */ 6008 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 6009 char topology[8]) 6010 { 6011 struct drm_tile_group *tg; 6012 int ret; 6013 6014 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 6015 if (!tg) 6016 return ERR_PTR(-ENOMEM); 6017 6018 kref_init(&tg->refcount); 6019 memcpy(tg->group_data, topology, 8); 6020 tg->dev = dev; 6021 6022 mutex_lock(&dev->mode_config.idr_mutex); 6023 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 6024 if (ret >= 0) { 6025 tg->id = ret; 6026 } else { 6027 kfree(tg); 6028 tg = ERR_PTR(ret); 6029 } 6030 6031 mutex_unlock(&dev->mode_config.idr_mutex); 6032 return tg; 6033 } 6034 EXPORT_SYMBOL(drm_mode_create_tile_group); 6035