1 /* 2 * Copyright (c) 2006-2008 Intel Corporation 3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 4 * Copyright (c) 2008 Red Hat Inc. 5 * 6 * DRM core CRTC related functions 7 * 8 * Permission to use, copy, modify, distribute, and sell this software and its 9 * documentation for any purpose is hereby granted without fee, provided that 10 * the above copyright notice appear in all copies and that both that copyright 11 * notice and this permission notice appear in supporting documentation, and 12 * that the name of the copyright holders not be used in advertising or 13 * publicity pertaining to distribution of the software without specific, 14 * written prior permission. The copyright holders make no representations 15 * about the suitability of this software for any purpose. It is provided "as 16 * is" without express or implied warranty. 17 * 18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 24 * OF THIS SOFTWARE. 25 * 26 * Authors: 27 * Keith Packard 28 * Eric Anholt <eric@anholt.net> 29 * Dave Airlie <airlied@linux.ie> 30 * Jesse Barnes <jesse.barnes@intel.com> 31 */ 32 #include <linux/ctype.h> 33 #include <linux/list.h> 34 #include <linux/slab.h> 35 #include <linux/export.h> 36 #include <drm/drmP.h> 37 #include <drm/drm_crtc.h> 38 #include <drm/drm_edid.h> 39 #include <drm/drm_fourcc.h> 40 #include <drm/drm_modeset_lock.h> 41 #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 struct ida ida; 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 int i; 196 197 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 198 ida_init(&drm_connector_enum_list[i].ida); 199 } 200 201 void drm_connector_ida_destroy(void) 202 { 203 int i; 204 205 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 206 ida_destroy(&drm_connector_enum_list[i].ida); 207 } 208 209 /** 210 * drm_get_connector_status_name - return a string for connector status 211 * @status: connector status to compute name of 212 * 213 * In contrast to the other drm_get_*_name functions this one here returns a 214 * const pointer and hence is threadsafe. 215 */ 216 const char *drm_get_connector_status_name(enum drm_connector_status status) 217 { 218 if (status == connector_status_connected) 219 return "connected"; 220 else if (status == connector_status_disconnected) 221 return "disconnected"; 222 else 223 return "unknown"; 224 } 225 EXPORT_SYMBOL(drm_get_connector_status_name); 226 227 /** 228 * drm_get_subpixel_order_name - return a string for a given subpixel enum 229 * @order: enum of subpixel_order 230 * 231 * Note you could abuse this and return something out of bounds, but that 232 * would be a caller error. No unscrubbed user data should make it here. 233 */ 234 const char *drm_get_subpixel_order_name(enum subpixel_order order) 235 { 236 return drm_subpixel_enum_list[order].name; 237 } 238 EXPORT_SYMBOL(drm_get_subpixel_order_name); 239 240 static char printable_char(int c) 241 { 242 return isascii(c) && isprint(c) ? c : '?'; 243 } 244 245 /** 246 * drm_get_format_name - return a string for drm fourcc format 247 * @format: format to compute name of 248 * 249 * Note that the buffer used by this function is globally shared and owned by 250 * the function itself. 251 * 252 * FIXME: This isn't really multithreading safe. 253 */ 254 const char *drm_get_format_name(uint32_t format) 255 { 256 static char buf[32]; 257 258 snprintf(buf, sizeof(buf), 259 "%c%c%c%c %s-endian (0x%08x)", 260 printable_char(format & 0xff), 261 printable_char((format >> 8) & 0xff), 262 printable_char((format >> 16) & 0xff), 263 printable_char((format >> 24) & 0x7f), 264 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", 265 format); 266 267 return buf; 268 } 269 EXPORT_SYMBOL(drm_get_format_name); 270 271 /* 272 * Internal function to assign a slot in the object idr and optionally 273 * register the object into the idr. 274 */ 275 static int drm_mode_object_get_reg(struct drm_device *dev, 276 struct drm_mode_object *obj, 277 uint32_t obj_type, 278 bool register_obj) 279 { 280 int ret; 281 282 mutex_lock(&dev->mode_config.idr_mutex); 283 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); 284 if (ret >= 0) { 285 /* 286 * Set up the object linking under the protection of the idr 287 * lock so that other users can't see inconsistent state. 288 */ 289 obj->id = ret; 290 obj->type = obj_type; 291 } 292 mutex_unlock(&dev->mode_config.idr_mutex); 293 294 return ret < 0 ? ret : 0; 295 } 296 297 /** 298 * drm_mode_object_get - allocate a new modeset identifier 299 * @dev: DRM device 300 * @obj: object pointer, used to generate unique ID 301 * @obj_type: object type 302 * 303 * Create a unique identifier based on @ptr in @dev's identifier space. Used 304 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix 305 * modeset identifiers are _not_ reference counted. Hence don't use this for 306 * reference counted modeset objects like framebuffers. 307 * 308 * Returns: 309 * Zero on success, error code on failure. 310 */ 311 int drm_mode_object_get(struct drm_device *dev, 312 struct drm_mode_object *obj, uint32_t obj_type) 313 { 314 return drm_mode_object_get_reg(dev, obj, obj_type, true); 315 } 316 317 static void drm_mode_object_register(struct drm_device *dev, 318 struct drm_mode_object *obj) 319 { 320 mutex_lock(&dev->mode_config.idr_mutex); 321 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); 322 mutex_unlock(&dev->mode_config.idr_mutex); 323 } 324 325 /** 326 * drm_mode_object_put - free a modeset identifer 327 * @dev: DRM device 328 * @object: object to free 329 * 330 * Free @id from @dev's unique identifier pool. Note that despite the _get 331 * postfix modeset identifiers are _not_ reference counted. Hence don't use this 332 * for reference counted modeset objects like framebuffers. 333 */ 334 void drm_mode_object_put(struct drm_device *dev, 335 struct drm_mode_object *object) 336 { 337 mutex_lock(&dev->mode_config.idr_mutex); 338 idr_remove(&dev->mode_config.crtc_idr, object->id); 339 mutex_unlock(&dev->mode_config.idr_mutex); 340 } 341 342 static struct drm_mode_object *_object_find(struct drm_device *dev, 343 uint32_t id, uint32_t type) 344 { 345 struct drm_mode_object *obj = NULL; 346 347 mutex_lock(&dev->mode_config.idr_mutex); 348 obj = idr_find(&dev->mode_config.crtc_idr, id); 349 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) 350 obj = NULL; 351 if (obj && obj->id != id) 352 obj = NULL; 353 /* don't leak out unref'd fb's */ 354 if (obj && 355 (obj->type == DRM_MODE_OBJECT_FB || 356 obj->type == DRM_MODE_OBJECT_BLOB)) 357 obj = NULL; 358 mutex_unlock(&dev->mode_config.idr_mutex); 359 360 return obj; 361 } 362 363 /** 364 * drm_mode_object_find - look up a drm object with static lifetime 365 * @dev: drm device 366 * @id: id of the mode object 367 * @type: type of the mode object 368 * 369 * Note that framebuffers cannot be looked up with this functions - since those 370 * are reference counted, they need special treatment. Even with 371 * DRM_MODE_OBJECT_ANY (although that will simply return NULL 372 * rather than WARN_ON()). 373 */ 374 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, 375 uint32_t id, uint32_t type) 376 { 377 struct drm_mode_object *obj = NULL; 378 379 /* Framebuffers are reference counted and need their own lookup 380 * function.*/ 381 WARN_ON(type == DRM_MODE_OBJECT_FB || type == DRM_MODE_OBJECT_BLOB); 382 obj = _object_find(dev, id, type); 383 return obj; 384 } 385 EXPORT_SYMBOL(drm_mode_object_find); 386 387 /** 388 * drm_framebuffer_init - initialize a framebuffer 389 * @dev: DRM device 390 * @fb: framebuffer to be initialized 391 * @funcs: ... with these functions 392 * 393 * Allocates an ID for the framebuffer's parent mode object, sets its mode 394 * functions & device file and adds it to the master fd list. 395 * 396 * IMPORTANT: 397 * This functions publishes the fb and makes it available for concurrent access 398 * by other users. Which means by this point the fb _must_ be fully set up - 399 * since all the fb attributes are invariant over its lifetime, no further 400 * locking but only correct reference counting is required. 401 * 402 * Returns: 403 * Zero on success, error code on failure. 404 */ 405 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, 406 const struct drm_framebuffer_funcs *funcs) 407 { 408 int ret; 409 410 mutex_lock(&dev->mode_config.fb_lock); 411 kref_init(&fb->refcount); 412 INIT_LIST_HEAD(&fb->filp_head); 413 fb->dev = dev; 414 fb->funcs = funcs; 415 416 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB); 417 if (ret) 418 goto out; 419 420 dev->mode_config.num_fb++; 421 list_add(&fb->head, &dev->mode_config.fb_list); 422 out: 423 mutex_unlock(&dev->mode_config.fb_lock); 424 425 return ret; 426 } 427 EXPORT_SYMBOL(drm_framebuffer_init); 428 429 /* dev->mode_config.fb_lock must be held! */ 430 static void __drm_framebuffer_unregister(struct drm_device *dev, 431 struct drm_framebuffer *fb) 432 { 433 drm_mode_object_put(dev, &fb->base); 434 435 fb->base.id = 0; 436 } 437 438 static void drm_framebuffer_free(struct kref *kref) 439 { 440 struct drm_framebuffer *fb = 441 container_of(kref, struct drm_framebuffer, refcount); 442 struct drm_device *dev = fb->dev; 443 444 /* 445 * The lookup idr holds a weak reference, which has not necessarily been 446 * removed at this point. Check for that. 447 */ 448 mutex_lock(&dev->mode_config.fb_lock); 449 if (fb->base.id) { 450 /* Mark fb as reaped and drop idr ref. */ 451 __drm_framebuffer_unregister(dev, fb); 452 } 453 mutex_unlock(&dev->mode_config.fb_lock); 454 455 fb->funcs->destroy(fb); 456 } 457 458 static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev, 459 uint32_t id) 460 { 461 struct drm_mode_object *obj = NULL; 462 struct drm_framebuffer *fb; 463 464 mutex_lock(&dev->mode_config.idr_mutex); 465 obj = idr_find(&dev->mode_config.crtc_idr, id); 466 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id)) 467 fb = NULL; 468 else 469 fb = obj_to_fb(obj); 470 mutex_unlock(&dev->mode_config.idr_mutex); 471 472 return fb; 473 } 474 475 /** 476 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference 477 * @dev: drm device 478 * @id: id of the fb object 479 * 480 * If successful, this grabs an additional reference to the framebuffer - 481 * callers need to make sure to eventually unreference the returned framebuffer 482 * again, using @drm_framebuffer_unreference. 483 */ 484 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, 485 uint32_t id) 486 { 487 struct drm_framebuffer *fb; 488 489 mutex_lock(&dev->mode_config.fb_lock); 490 fb = __drm_framebuffer_lookup(dev, id); 491 if (fb) { 492 if (!kref_get_unless_zero(&fb->refcount)) 493 fb = NULL; 494 } 495 mutex_unlock(&dev->mode_config.fb_lock); 496 497 return fb; 498 } 499 EXPORT_SYMBOL(drm_framebuffer_lookup); 500 501 /** 502 * drm_framebuffer_unreference - unref a framebuffer 503 * @fb: framebuffer to unref 504 * 505 * This functions decrements the fb's refcount and frees it if it drops to zero. 506 */ 507 void drm_framebuffer_unreference(struct drm_framebuffer *fb) 508 { 509 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 510 kref_put(&fb->refcount, drm_framebuffer_free); 511 } 512 EXPORT_SYMBOL(drm_framebuffer_unreference); 513 514 /** 515 * drm_framebuffer_reference - incr the fb refcnt 516 * @fb: framebuffer 517 * 518 * This functions increments the fb's refcount. 519 */ 520 void drm_framebuffer_reference(struct drm_framebuffer *fb) 521 { 522 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 523 kref_get(&fb->refcount); 524 } 525 EXPORT_SYMBOL(drm_framebuffer_reference); 526 527 /** 528 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr 529 * @fb: fb to unregister 530 * 531 * Drivers need to call this when cleaning up driver-private framebuffers, e.g. 532 * those used for fbdev. Note that the caller must hold a reference of it's own, 533 * i.e. the object may not be destroyed through this call (since it'll lead to a 534 * locking inversion). 535 */ 536 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) 537 { 538 struct drm_device *dev; 539 540 if (!fb) 541 return; 542 543 dev = fb->dev; 544 545 mutex_lock(&dev->mode_config.fb_lock); 546 /* Mark fb as reaped and drop idr ref. */ 547 __drm_framebuffer_unregister(dev, fb); 548 mutex_unlock(&dev->mode_config.fb_lock); 549 } 550 EXPORT_SYMBOL(drm_framebuffer_unregister_private); 551 552 /** 553 * drm_framebuffer_cleanup - remove a framebuffer object 554 * @fb: framebuffer to remove 555 * 556 * Cleanup framebuffer. This function is intended to be used from the drivers 557 * ->destroy callback. It can also be used to clean up driver private 558 * framebuffers embedded into a larger structure. 559 * 560 * Note that this function does not remove the fb from active usuage - if it is 561 * still used anywhere, hilarity can ensue since userspace could call getfb on 562 * the id and get back -EINVAL. Obviously no concern at driver unload time. 563 * 564 * Also, the framebuffer will not be removed from the lookup idr - for 565 * user-created framebuffers this will happen in in the rmfb ioctl. For 566 * driver-private objects (e.g. for fbdev) drivers need to explicitly call 567 * drm_framebuffer_unregister_private. 568 */ 569 void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 570 { 571 struct drm_device *dev = fb->dev; 572 573 mutex_lock(&dev->mode_config.fb_lock); 574 list_del(&fb->head); 575 dev->mode_config.num_fb--; 576 mutex_unlock(&dev->mode_config.fb_lock); 577 } 578 EXPORT_SYMBOL(drm_framebuffer_cleanup); 579 580 /** 581 * drm_framebuffer_remove - remove and unreference a framebuffer object 582 * @fb: framebuffer to remove 583 * 584 * Scans all the CRTCs and planes in @dev's mode_config. If they're 585 * using @fb, removes it, setting it to NULL. Then drops the reference to the 586 * passed-in framebuffer. Might take the modeset locks. 587 * 588 * Note that this function optimizes the cleanup away if the caller holds the 589 * last reference to the framebuffer. It is also guaranteed to not take the 590 * modeset locks in this case. 591 */ 592 void drm_framebuffer_remove(struct drm_framebuffer *fb) 593 { 594 struct drm_device *dev; 595 struct drm_crtc *crtc; 596 struct drm_plane *plane; 597 struct drm_mode_set set; 598 int ret; 599 600 if (!fb) 601 return; 602 603 dev = fb->dev; 604 605 WARN_ON(!list_empty(&fb->filp_head)); 606 607 /* 608 * drm ABI mandates that we remove any deleted framebuffers from active 609 * useage. But since most sane clients only remove framebuffers they no 610 * longer need, try to optimize this away. 611 * 612 * Since we're holding a reference ourselves, observing a refcount of 1 613 * means that we're the last holder and can skip it. Also, the refcount 614 * can never increase from 1 again, so we don't need any barriers or 615 * locks. 616 * 617 * Note that userspace could try to race with use and instate a new 618 * usage _after_ we've cleared all current ones. End result will be an 619 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot 620 * in this manner. 621 */ 622 if (atomic_read(&fb->refcount.refcount) > 1) { 623 drm_modeset_lock_all(dev); 624 /* remove from any CRTC */ 625 drm_for_each_crtc(crtc, dev) { 626 if (crtc->primary->fb == fb) { 627 /* should turn off the crtc */ 628 memset(&set, 0, sizeof(struct drm_mode_set)); 629 set.crtc = crtc; 630 set.fb = NULL; 631 ret = drm_mode_set_config_internal(&set); 632 if (ret) 633 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); 634 } 635 } 636 637 drm_for_each_plane(plane, dev) { 638 if (plane->fb == fb) 639 drm_plane_force_disable(plane); 640 } 641 drm_modeset_unlock_all(dev); 642 } 643 644 drm_framebuffer_unreference(fb); 645 } 646 EXPORT_SYMBOL(drm_framebuffer_remove); 647 648 DEFINE_WW_CLASS(crtc_ww_class); 649 650 static unsigned int drm_num_crtcs(struct drm_device *dev) 651 { 652 unsigned int num = 0; 653 struct drm_crtc *tmp; 654 655 drm_for_each_crtc(tmp, dev) { 656 num++; 657 } 658 659 return num; 660 } 661 662 /** 663 * drm_crtc_init_with_planes - Initialise a new CRTC object with 664 * specified primary and cursor planes. 665 * @dev: DRM device 666 * @crtc: CRTC object to init 667 * @primary: Primary plane for CRTC 668 * @cursor: Cursor plane for CRTC 669 * @funcs: callbacks for the new CRTC 670 * @name: printf style format string for the CRTC name, or NULL for default name 671 * 672 * Inits a new object created as base part of a driver crtc object. 673 * 674 * Returns: 675 * Zero on success, error code on failure. 676 */ 677 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 678 struct drm_plane *primary, 679 struct drm_plane *cursor, 680 const struct drm_crtc_funcs *funcs, 681 const char *name, ...) 682 { 683 struct drm_mode_config *config = &dev->mode_config; 684 int ret; 685 686 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); 687 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); 688 689 crtc->dev = dev; 690 crtc->funcs = funcs; 691 692 drm_modeset_lock_init(&crtc->mutex); 693 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 694 if (ret) 695 return ret; 696 697 if (name) { 698 va_list ap; 699 700 va_start(ap, name); 701 crtc->name = kvasprintf(GFP_KERNEL, name, ap); 702 va_end(ap); 703 } else { 704 crtc->name = kasprintf(GFP_KERNEL, "crtc-%d", 705 drm_num_crtcs(dev)); 706 } 707 if (!crtc->name) { 708 drm_mode_object_put(dev, &crtc->base); 709 return -ENOMEM; 710 } 711 712 crtc->base.properties = &crtc->properties; 713 714 list_add_tail(&crtc->head, &config->crtc_list); 715 config->num_crtc++; 716 717 crtc->primary = primary; 718 crtc->cursor = cursor; 719 if (primary) 720 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 721 if (cursor) 722 cursor->possible_crtcs = 1 << drm_crtc_index(crtc); 723 724 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 725 drm_object_attach_property(&crtc->base, config->prop_active, 0); 726 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); 727 } 728 729 return 0; 730 } 731 EXPORT_SYMBOL(drm_crtc_init_with_planes); 732 733 /** 734 * drm_crtc_cleanup - Clean up the core crtc usage 735 * @crtc: CRTC to cleanup 736 * 737 * This function cleans up @crtc and removes it from the DRM mode setting 738 * core. Note that the function does *not* free the crtc structure itself, 739 * this is the responsibility of the caller. 740 */ 741 void drm_crtc_cleanup(struct drm_crtc *crtc) 742 { 743 struct drm_device *dev = crtc->dev; 744 745 kfree(crtc->gamma_store); 746 crtc->gamma_store = NULL; 747 748 drm_modeset_lock_fini(&crtc->mutex); 749 750 drm_mode_object_put(dev, &crtc->base); 751 list_del(&crtc->head); 752 dev->mode_config.num_crtc--; 753 754 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); 755 if (crtc->state && crtc->funcs->atomic_destroy_state) 756 crtc->funcs->atomic_destroy_state(crtc, crtc->state); 757 758 kfree(crtc->name); 759 760 memset(crtc, 0, sizeof(*crtc)); 761 } 762 EXPORT_SYMBOL(drm_crtc_cleanup); 763 764 /** 765 * drm_crtc_index - find the index of a registered CRTC 766 * @crtc: CRTC to find index for 767 * 768 * Given a registered CRTC, return the index of that CRTC within a DRM 769 * device's list of CRTCs. 770 */ 771 unsigned int drm_crtc_index(struct drm_crtc *crtc) 772 { 773 unsigned int index = 0; 774 struct drm_crtc *tmp; 775 776 drm_for_each_crtc(tmp, crtc->dev) { 777 if (tmp == crtc) 778 return index; 779 780 index++; 781 } 782 783 BUG(); 784 } 785 EXPORT_SYMBOL(drm_crtc_index); 786 787 /* 788 * drm_mode_remove - remove and free a mode 789 * @connector: connector list to modify 790 * @mode: mode to remove 791 * 792 * Remove @mode from @connector's mode list, then free it. 793 */ 794 static void drm_mode_remove(struct drm_connector *connector, 795 struct drm_display_mode *mode) 796 { 797 list_del(&mode->head); 798 drm_mode_destroy(connector->dev, mode); 799 } 800 801 /** 802 * drm_display_info_set_bus_formats - set the supported bus formats 803 * @info: display info to store bus formats in 804 * @formats: array containing the supported bus formats 805 * @num_formats: the number of entries in the fmts array 806 * 807 * Store the supported bus formats in display info structure. 808 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for 809 * a full list of available formats. 810 */ 811 int drm_display_info_set_bus_formats(struct drm_display_info *info, 812 const u32 *formats, 813 unsigned int num_formats) 814 { 815 u32 *fmts = NULL; 816 817 if (!formats && num_formats) 818 return -EINVAL; 819 820 if (formats && num_formats) { 821 fmts = kmemdup(formats, sizeof(*formats) * num_formats, 822 GFP_KERNEL); 823 if (!fmts) 824 return -ENOMEM; 825 } 826 827 kfree(info->bus_formats); 828 info->bus_formats = fmts; 829 info->num_bus_formats = num_formats; 830 831 return 0; 832 } 833 EXPORT_SYMBOL(drm_display_info_set_bus_formats); 834 835 /** 836 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 837 * @connector: connector to quwery 838 * 839 * The kernel supports per-connector configration of its consoles through 840 * use of the video= parameter. This function parses that option and 841 * extracts the user's specified mode (or enable/disable status) for a 842 * particular connector. This is typically only used during the early fbdev 843 * setup. 844 */ 845 static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 846 { 847 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 848 char *option = NULL; 849 850 if (fb_get_options(connector->name, &option)) 851 return; 852 853 if (!drm_mode_parse_command_line_for_connector(option, 854 connector, 855 mode)) 856 return; 857 858 if (mode->force) { 859 const char *s; 860 861 switch (mode->force) { 862 case DRM_FORCE_OFF: 863 s = "OFF"; 864 break; 865 case DRM_FORCE_ON_DIGITAL: 866 s = "ON - dig"; 867 break; 868 default: 869 case DRM_FORCE_ON: 870 s = "ON"; 871 break; 872 } 873 874 DRM_INFO("forcing %s connector %s\n", connector->name, s); 875 connector->force = mode->force; 876 } 877 878 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 879 connector->name, 880 mode->xres, mode->yres, 881 mode->refresh_specified ? mode->refresh : 60, 882 mode->rb ? " reduced blanking" : "", 883 mode->margins ? " with margins" : "", 884 mode->interlace ? " interlaced" : ""); 885 } 886 887 /** 888 * drm_connector_init - Init a preallocated connector 889 * @dev: DRM device 890 * @connector: the connector to init 891 * @funcs: callbacks for this connector 892 * @connector_type: user visible type of the connector 893 * 894 * Initialises a preallocated connector. Connectors should be 895 * subclassed as part of driver connector objects. 896 * 897 * Returns: 898 * Zero on success, error code on failure. 899 */ 900 int drm_connector_init(struct drm_device *dev, 901 struct drm_connector *connector, 902 const struct drm_connector_funcs *funcs, 903 int connector_type) 904 { 905 struct drm_mode_config *config = &dev->mode_config; 906 int ret; 907 struct ida *connector_ida = 908 &drm_connector_enum_list[connector_type].ida; 909 910 drm_modeset_lock_all(dev); 911 912 ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false); 913 if (ret) 914 goto out_unlock; 915 916 connector->base.properties = &connector->properties; 917 connector->dev = dev; 918 connector->funcs = funcs; 919 920 connector->connector_id = ida_simple_get(&config->connector_ida, 0, 0, GFP_KERNEL); 921 if (connector->connector_id < 0) { 922 ret = connector->connector_id; 923 goto out_put; 924 } 925 926 connector->connector_type = connector_type; 927 connector->connector_type_id = 928 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); 929 if (connector->connector_type_id < 0) { 930 ret = connector->connector_type_id; 931 goto out_put_id; 932 } 933 connector->name = 934 kasprintf(GFP_KERNEL, "%s-%d", 935 drm_connector_enum_list[connector_type].name, 936 connector->connector_type_id); 937 if (!connector->name) { 938 ret = -ENOMEM; 939 goto out_put_type_id; 940 } 941 942 INIT_LIST_HEAD(&connector->probed_modes); 943 INIT_LIST_HEAD(&connector->modes); 944 connector->edid_blob_ptr = NULL; 945 connector->status = connector_status_unknown; 946 947 drm_connector_get_cmdline_mode(connector); 948 949 /* We should add connectors at the end to avoid upsetting the connector 950 * index too much. */ 951 list_add_tail(&connector->head, &config->connector_list); 952 config->num_connector++; 953 954 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 955 drm_object_attach_property(&connector->base, 956 config->edid_property, 957 0); 958 959 drm_object_attach_property(&connector->base, 960 config->dpms_property, 0); 961 962 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 963 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); 964 } 965 966 connector->debugfs_entry = NULL; 967 out_put_type_id: 968 if (ret) 969 ida_remove(connector_ida, connector->connector_type_id); 970 out_put_id: 971 if (ret) 972 ida_remove(&config->connector_ida, connector->connector_id); 973 out_put: 974 if (ret) 975 drm_mode_object_put(dev, &connector->base); 976 977 out_unlock: 978 drm_modeset_unlock_all(dev); 979 980 return ret; 981 } 982 EXPORT_SYMBOL(drm_connector_init); 983 984 /** 985 * drm_connector_cleanup - cleans up an initialised connector 986 * @connector: connector to cleanup 987 * 988 * Cleans up the connector but doesn't free the object. 989 */ 990 void drm_connector_cleanup(struct drm_connector *connector) 991 { 992 struct drm_device *dev = connector->dev; 993 struct drm_display_mode *mode, *t; 994 995 if (connector->tile_group) { 996 drm_mode_put_tile_group(dev, connector->tile_group); 997 connector->tile_group = NULL; 998 } 999 1000 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 1001 drm_mode_remove(connector, mode); 1002 1003 list_for_each_entry_safe(mode, t, &connector->modes, head) 1004 drm_mode_remove(connector, mode); 1005 1006 ida_remove(&drm_connector_enum_list[connector->connector_type].ida, 1007 connector->connector_type_id); 1008 1009 ida_remove(&dev->mode_config.connector_ida, 1010 connector->connector_id); 1011 1012 kfree(connector->display_info.bus_formats); 1013 drm_mode_object_put(dev, &connector->base); 1014 kfree(connector->name); 1015 connector->name = NULL; 1016 list_del(&connector->head); 1017 dev->mode_config.num_connector--; 1018 1019 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 1020 if (connector->state && connector->funcs->atomic_destroy_state) 1021 connector->funcs->atomic_destroy_state(connector, 1022 connector->state); 1023 1024 memset(connector, 0, sizeof(*connector)); 1025 } 1026 EXPORT_SYMBOL(drm_connector_cleanup); 1027 1028 /** 1029 * drm_connector_register - register a connector 1030 * @connector: the connector to register 1031 * 1032 * Register userspace interfaces for a connector 1033 * 1034 * Returns: 1035 * Zero on success, error code on failure. 1036 */ 1037 int drm_connector_register(struct drm_connector *connector) 1038 { 1039 int ret; 1040 1041 drm_mode_object_register(connector->dev, &connector->base); 1042 1043 ret = drm_sysfs_connector_add(connector); 1044 if (ret) 1045 return ret; 1046 1047 ret = drm_debugfs_connector_add(connector); 1048 if (ret) { 1049 drm_sysfs_connector_remove(connector); 1050 return ret; 1051 } 1052 1053 return 0; 1054 } 1055 EXPORT_SYMBOL(drm_connector_register); 1056 1057 /** 1058 * drm_connector_unregister - unregister a connector 1059 * @connector: the connector to unregister 1060 * 1061 * Unregister userspace interfaces for a connector 1062 */ 1063 void drm_connector_unregister(struct drm_connector *connector) 1064 { 1065 drm_sysfs_connector_remove(connector); 1066 drm_debugfs_connector_remove(connector); 1067 } 1068 EXPORT_SYMBOL(drm_connector_unregister); 1069 1070 1071 /** 1072 * drm_connector_unplug_all - unregister connector userspace interfaces 1073 * @dev: drm device 1074 * 1075 * This function unregisters all connector userspace interfaces in sysfs. Should 1076 * be call when the device is disconnected, e.g. from an usb driver's 1077 * ->disconnect callback. 1078 */ 1079 void drm_connector_unplug_all(struct drm_device *dev) 1080 { 1081 struct drm_connector *connector; 1082 1083 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */ 1084 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1085 drm_connector_unregister(connector); 1086 1087 } 1088 EXPORT_SYMBOL(drm_connector_unplug_all); 1089 1090 /** 1091 * drm_encoder_init - Init a preallocated encoder 1092 * @dev: drm device 1093 * @encoder: the encoder to init 1094 * @funcs: callbacks for this encoder 1095 * @encoder_type: user visible type of the encoder 1096 * @name: printf style format string for the encoder name, or NULL for default name 1097 * 1098 * Initialises a preallocated encoder. Encoder should be 1099 * subclassed as part of driver encoder objects. 1100 * 1101 * Returns: 1102 * Zero on success, error code on failure. 1103 */ 1104 int drm_encoder_init(struct drm_device *dev, 1105 struct drm_encoder *encoder, 1106 const struct drm_encoder_funcs *funcs, 1107 int encoder_type, const char *name, ...) 1108 { 1109 int ret; 1110 1111 drm_modeset_lock_all(dev); 1112 1113 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1114 if (ret) 1115 goto out_unlock; 1116 1117 encoder->dev = dev; 1118 encoder->encoder_type = encoder_type; 1119 encoder->funcs = funcs; 1120 if (name) { 1121 va_list ap; 1122 1123 va_start(ap, name); 1124 encoder->name = kvasprintf(GFP_KERNEL, name, ap); 1125 va_end(ap); 1126 } else { 1127 encoder->name = kasprintf(GFP_KERNEL, "%s-%d", 1128 drm_encoder_enum_list[encoder_type].name, 1129 encoder->base.id); 1130 } 1131 if (!encoder->name) { 1132 ret = -ENOMEM; 1133 goto out_put; 1134 } 1135 1136 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1137 dev->mode_config.num_encoder++; 1138 1139 out_put: 1140 if (ret) 1141 drm_mode_object_put(dev, &encoder->base); 1142 1143 out_unlock: 1144 drm_modeset_unlock_all(dev); 1145 1146 return ret; 1147 } 1148 EXPORT_SYMBOL(drm_encoder_init); 1149 1150 /** 1151 * drm_encoder_index - find the index of a registered encoder 1152 * @encoder: encoder to find index for 1153 * 1154 * Given a registered encoder, return the index of that encoder within a DRM 1155 * device's list of encoders. 1156 */ 1157 unsigned int drm_encoder_index(struct drm_encoder *encoder) 1158 { 1159 unsigned int index = 0; 1160 struct drm_encoder *tmp; 1161 1162 drm_for_each_encoder(tmp, encoder->dev) { 1163 if (tmp == encoder) 1164 return index; 1165 1166 index++; 1167 } 1168 1169 BUG(); 1170 } 1171 EXPORT_SYMBOL(drm_encoder_index); 1172 1173 /** 1174 * drm_encoder_cleanup - cleans up an initialised encoder 1175 * @encoder: encoder to cleanup 1176 * 1177 * Cleans up the encoder but doesn't free the object. 1178 */ 1179 void drm_encoder_cleanup(struct drm_encoder *encoder) 1180 { 1181 struct drm_device *dev = encoder->dev; 1182 1183 drm_modeset_lock_all(dev); 1184 drm_mode_object_put(dev, &encoder->base); 1185 kfree(encoder->name); 1186 list_del(&encoder->head); 1187 dev->mode_config.num_encoder--; 1188 drm_modeset_unlock_all(dev); 1189 1190 memset(encoder, 0, sizeof(*encoder)); 1191 } 1192 EXPORT_SYMBOL(drm_encoder_cleanup); 1193 1194 static unsigned int drm_num_planes(struct drm_device *dev) 1195 { 1196 unsigned int num = 0; 1197 struct drm_plane *tmp; 1198 1199 drm_for_each_plane(tmp, dev) { 1200 num++; 1201 } 1202 1203 return num; 1204 } 1205 1206 /** 1207 * drm_universal_plane_init - Initialize a new universal plane object 1208 * @dev: DRM device 1209 * @plane: plane object to init 1210 * @possible_crtcs: bitmask of possible CRTCs 1211 * @funcs: callbacks for the new plane 1212 * @formats: array of supported formats (%DRM_FORMAT_*) 1213 * @format_count: number of elements in @formats 1214 * @type: type of plane (overlay, primary, cursor) 1215 * @name: printf style format string for the plane name, or NULL for default name 1216 * 1217 * Initializes a plane object of type @type. 1218 * 1219 * Returns: 1220 * Zero on success, error code on failure. 1221 */ 1222 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1223 unsigned long possible_crtcs, 1224 const struct drm_plane_funcs *funcs, 1225 const uint32_t *formats, unsigned int format_count, 1226 enum drm_plane_type type, 1227 const char *name, ...) 1228 { 1229 struct drm_mode_config *config = &dev->mode_config; 1230 int ret; 1231 1232 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1233 if (ret) 1234 return ret; 1235 1236 drm_modeset_lock_init(&plane->mutex); 1237 1238 plane->base.properties = &plane->properties; 1239 plane->dev = dev; 1240 plane->funcs = funcs; 1241 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t), 1242 GFP_KERNEL); 1243 if (!plane->format_types) { 1244 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1245 drm_mode_object_put(dev, &plane->base); 1246 return -ENOMEM; 1247 } 1248 1249 if (name) { 1250 va_list ap; 1251 1252 va_start(ap, name); 1253 plane->name = kvasprintf(GFP_KERNEL, name, ap); 1254 va_end(ap); 1255 } else { 1256 plane->name = kasprintf(GFP_KERNEL, "plane-%d", 1257 drm_num_planes(dev)); 1258 } 1259 if (!plane->name) { 1260 kfree(plane->format_types); 1261 drm_mode_object_put(dev, &plane->base); 1262 return -ENOMEM; 1263 } 1264 1265 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1266 plane->format_count = format_count; 1267 plane->possible_crtcs = possible_crtcs; 1268 plane->type = type; 1269 1270 list_add_tail(&plane->head, &config->plane_list); 1271 config->num_total_plane++; 1272 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1273 config->num_overlay_plane++; 1274 1275 drm_object_attach_property(&plane->base, 1276 config->plane_type_property, 1277 plane->type); 1278 1279 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 1280 drm_object_attach_property(&plane->base, config->prop_fb_id, 0); 1281 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); 1282 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); 1283 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); 1284 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); 1285 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); 1286 drm_object_attach_property(&plane->base, config->prop_src_x, 0); 1287 drm_object_attach_property(&plane->base, config->prop_src_y, 0); 1288 drm_object_attach_property(&plane->base, config->prop_src_w, 0); 1289 drm_object_attach_property(&plane->base, config->prop_src_h, 0); 1290 } 1291 1292 return 0; 1293 } 1294 EXPORT_SYMBOL(drm_universal_plane_init); 1295 1296 /** 1297 * drm_plane_init - Initialize a legacy plane 1298 * @dev: DRM device 1299 * @plane: plane object to init 1300 * @possible_crtcs: bitmask of possible CRTCs 1301 * @funcs: callbacks for the new plane 1302 * @formats: array of supported formats (%DRM_FORMAT_*) 1303 * @format_count: number of elements in @formats 1304 * @is_primary: plane type (primary vs overlay) 1305 * 1306 * Legacy API to initialize a DRM plane. 1307 * 1308 * New drivers should call drm_universal_plane_init() instead. 1309 * 1310 * Returns: 1311 * Zero on success, error code on failure. 1312 */ 1313 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1314 unsigned long possible_crtcs, 1315 const struct drm_plane_funcs *funcs, 1316 const uint32_t *formats, unsigned int format_count, 1317 bool is_primary) 1318 { 1319 enum drm_plane_type type; 1320 1321 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1322 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1323 formats, format_count, type, NULL); 1324 } 1325 EXPORT_SYMBOL(drm_plane_init); 1326 1327 /** 1328 * drm_plane_cleanup - Clean up the core plane usage 1329 * @plane: plane to cleanup 1330 * 1331 * This function cleans up @plane and removes it from the DRM mode setting 1332 * core. Note that the function does *not* free the plane structure itself, 1333 * this is the responsibility of the caller. 1334 */ 1335 void drm_plane_cleanup(struct drm_plane *plane) 1336 { 1337 struct drm_device *dev = plane->dev; 1338 1339 drm_modeset_lock_all(dev); 1340 kfree(plane->format_types); 1341 drm_mode_object_put(dev, &plane->base); 1342 1343 BUG_ON(list_empty(&plane->head)); 1344 1345 list_del(&plane->head); 1346 dev->mode_config.num_total_plane--; 1347 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1348 dev->mode_config.num_overlay_plane--; 1349 drm_modeset_unlock_all(dev); 1350 1351 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1352 if (plane->state && plane->funcs->atomic_destroy_state) 1353 plane->funcs->atomic_destroy_state(plane, plane->state); 1354 1355 kfree(plane->name); 1356 1357 memset(plane, 0, sizeof(*plane)); 1358 } 1359 EXPORT_SYMBOL(drm_plane_cleanup); 1360 1361 /** 1362 * drm_plane_index - find the index of a registered plane 1363 * @plane: plane to find index for 1364 * 1365 * Given a registered plane, return the index of that CRTC within a DRM 1366 * device's list of planes. 1367 */ 1368 unsigned int drm_plane_index(struct drm_plane *plane) 1369 { 1370 unsigned int index = 0; 1371 struct drm_plane *tmp; 1372 1373 drm_for_each_plane(tmp, plane->dev) { 1374 if (tmp == plane) 1375 return index; 1376 1377 index++; 1378 } 1379 1380 BUG(); 1381 } 1382 EXPORT_SYMBOL(drm_plane_index); 1383 1384 /** 1385 * drm_plane_from_index - find the registered plane at an index 1386 * @dev: DRM device 1387 * @idx: index of registered plane to find for 1388 * 1389 * Given a plane index, return the registered plane from DRM device's 1390 * list of planes with matching index. 1391 */ 1392 struct drm_plane * 1393 drm_plane_from_index(struct drm_device *dev, int idx) 1394 { 1395 struct drm_plane *plane; 1396 unsigned int i = 0; 1397 1398 drm_for_each_plane(plane, dev) { 1399 if (i == idx) 1400 return plane; 1401 i++; 1402 } 1403 return NULL; 1404 } 1405 EXPORT_SYMBOL(drm_plane_from_index); 1406 1407 /** 1408 * drm_plane_force_disable - Forcibly disable a plane 1409 * @plane: plane to disable 1410 * 1411 * Forces the plane to be disabled. 1412 * 1413 * Used when the plane's current framebuffer is destroyed, 1414 * and when restoring fbdev mode. 1415 */ 1416 void drm_plane_force_disable(struct drm_plane *plane) 1417 { 1418 int ret; 1419 1420 if (!plane->fb) 1421 return; 1422 1423 plane->old_fb = plane->fb; 1424 ret = plane->funcs->disable_plane(plane); 1425 if (ret) { 1426 DRM_ERROR("failed to disable plane with busy fb\n"); 1427 plane->old_fb = NULL; 1428 return; 1429 } 1430 /* disconnect the plane from the fb and crtc: */ 1431 drm_framebuffer_unreference(plane->old_fb); 1432 plane->old_fb = NULL; 1433 plane->fb = NULL; 1434 plane->crtc = NULL; 1435 } 1436 EXPORT_SYMBOL(drm_plane_force_disable); 1437 1438 static int drm_mode_create_standard_properties(struct drm_device *dev) 1439 { 1440 struct drm_property *prop; 1441 1442 /* 1443 * Standard properties (apply to all connectors) 1444 */ 1445 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1446 DRM_MODE_PROP_IMMUTABLE, 1447 "EDID", 0); 1448 if (!prop) 1449 return -ENOMEM; 1450 dev->mode_config.edid_property = prop; 1451 1452 prop = drm_property_create_enum(dev, 0, 1453 "DPMS", drm_dpms_enum_list, 1454 ARRAY_SIZE(drm_dpms_enum_list)); 1455 if (!prop) 1456 return -ENOMEM; 1457 dev->mode_config.dpms_property = prop; 1458 1459 prop = drm_property_create(dev, 1460 DRM_MODE_PROP_BLOB | 1461 DRM_MODE_PROP_IMMUTABLE, 1462 "PATH", 0); 1463 if (!prop) 1464 return -ENOMEM; 1465 dev->mode_config.path_property = prop; 1466 1467 prop = drm_property_create(dev, 1468 DRM_MODE_PROP_BLOB | 1469 DRM_MODE_PROP_IMMUTABLE, 1470 "TILE", 0); 1471 if (!prop) 1472 return -ENOMEM; 1473 dev->mode_config.tile_property = prop; 1474 1475 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1476 "type", drm_plane_type_enum_list, 1477 ARRAY_SIZE(drm_plane_type_enum_list)); 1478 if (!prop) 1479 return -ENOMEM; 1480 dev->mode_config.plane_type_property = prop; 1481 1482 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1483 "SRC_X", 0, UINT_MAX); 1484 if (!prop) 1485 return -ENOMEM; 1486 dev->mode_config.prop_src_x = prop; 1487 1488 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1489 "SRC_Y", 0, UINT_MAX); 1490 if (!prop) 1491 return -ENOMEM; 1492 dev->mode_config.prop_src_y = prop; 1493 1494 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1495 "SRC_W", 0, UINT_MAX); 1496 if (!prop) 1497 return -ENOMEM; 1498 dev->mode_config.prop_src_w = prop; 1499 1500 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1501 "SRC_H", 0, UINT_MAX); 1502 if (!prop) 1503 return -ENOMEM; 1504 dev->mode_config.prop_src_h = prop; 1505 1506 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1507 "CRTC_X", INT_MIN, INT_MAX); 1508 if (!prop) 1509 return -ENOMEM; 1510 dev->mode_config.prop_crtc_x = prop; 1511 1512 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1513 "CRTC_Y", INT_MIN, INT_MAX); 1514 if (!prop) 1515 return -ENOMEM; 1516 dev->mode_config.prop_crtc_y = prop; 1517 1518 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1519 "CRTC_W", 0, INT_MAX); 1520 if (!prop) 1521 return -ENOMEM; 1522 dev->mode_config.prop_crtc_w = prop; 1523 1524 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1525 "CRTC_H", 0, INT_MAX); 1526 if (!prop) 1527 return -ENOMEM; 1528 dev->mode_config.prop_crtc_h = prop; 1529 1530 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1531 "FB_ID", DRM_MODE_OBJECT_FB); 1532 if (!prop) 1533 return -ENOMEM; 1534 dev->mode_config.prop_fb_id = prop; 1535 1536 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1537 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 1538 if (!prop) 1539 return -ENOMEM; 1540 dev->mode_config.prop_crtc_id = prop; 1541 1542 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 1543 "ACTIVE"); 1544 if (!prop) 1545 return -ENOMEM; 1546 dev->mode_config.prop_active = prop; 1547 1548 prop = drm_property_create(dev, 1549 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 1550 "MODE_ID", 0); 1551 if (!prop) 1552 return -ENOMEM; 1553 dev->mode_config.prop_mode_id = prop; 1554 1555 prop = drm_property_create(dev, 1556 DRM_MODE_PROP_BLOB, 1557 "DEGAMMA_LUT", 0); 1558 if (!prop) 1559 return -ENOMEM; 1560 dev->mode_config.degamma_lut_property = prop; 1561 1562 prop = drm_property_create_range(dev, 1563 DRM_MODE_PROP_IMMUTABLE, 1564 "DEGAMMA_LUT_SIZE", 0, UINT_MAX); 1565 if (!prop) 1566 return -ENOMEM; 1567 dev->mode_config.degamma_lut_size_property = prop; 1568 1569 prop = drm_property_create(dev, 1570 DRM_MODE_PROP_BLOB, 1571 "CTM", 0); 1572 if (!prop) 1573 return -ENOMEM; 1574 dev->mode_config.ctm_property = prop; 1575 1576 prop = drm_property_create(dev, 1577 DRM_MODE_PROP_BLOB, 1578 "GAMMA_LUT", 0); 1579 if (!prop) 1580 return -ENOMEM; 1581 dev->mode_config.gamma_lut_property = prop; 1582 1583 prop = drm_property_create_range(dev, 1584 DRM_MODE_PROP_IMMUTABLE, 1585 "GAMMA_LUT_SIZE", 0, UINT_MAX); 1586 if (!prop) 1587 return -ENOMEM; 1588 dev->mode_config.gamma_lut_size_property = prop; 1589 1590 return 0; 1591 } 1592 1593 /** 1594 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1595 * @dev: DRM device 1596 * 1597 * Called by a driver the first time a DVI-I connector is made. 1598 */ 1599 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1600 { 1601 struct drm_property *dvi_i_selector; 1602 struct drm_property *dvi_i_subconnector; 1603 1604 if (dev->mode_config.dvi_i_select_subconnector_property) 1605 return 0; 1606 1607 dvi_i_selector = 1608 drm_property_create_enum(dev, 0, 1609 "select subconnector", 1610 drm_dvi_i_select_enum_list, 1611 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1612 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1613 1614 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1615 "subconnector", 1616 drm_dvi_i_subconnector_enum_list, 1617 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1618 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1619 1620 return 0; 1621 } 1622 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1623 1624 /** 1625 * drm_create_tv_properties - create TV specific connector properties 1626 * @dev: DRM device 1627 * @num_modes: number of different TV formats (modes) supported 1628 * @modes: array of pointers to strings containing name of each format 1629 * 1630 * Called by a driver's TV initialization routine, this function creates 1631 * the TV specific connector properties for a given device. Caller is 1632 * responsible for allocating a list of format names and passing them to 1633 * this routine. 1634 */ 1635 int drm_mode_create_tv_properties(struct drm_device *dev, 1636 unsigned int num_modes, 1637 const char * const modes[]) 1638 { 1639 struct drm_property *tv_selector; 1640 struct drm_property *tv_subconnector; 1641 unsigned int i; 1642 1643 if (dev->mode_config.tv_select_subconnector_property) 1644 return 0; 1645 1646 /* 1647 * Basic connector properties 1648 */ 1649 tv_selector = drm_property_create_enum(dev, 0, 1650 "select subconnector", 1651 drm_tv_select_enum_list, 1652 ARRAY_SIZE(drm_tv_select_enum_list)); 1653 if (!tv_selector) 1654 goto nomem; 1655 1656 dev->mode_config.tv_select_subconnector_property = tv_selector; 1657 1658 tv_subconnector = 1659 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1660 "subconnector", 1661 drm_tv_subconnector_enum_list, 1662 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1663 if (!tv_subconnector) 1664 goto nomem; 1665 dev->mode_config.tv_subconnector_property = tv_subconnector; 1666 1667 /* 1668 * Other, TV specific properties: margins & TV modes. 1669 */ 1670 dev->mode_config.tv_left_margin_property = 1671 drm_property_create_range(dev, 0, "left margin", 0, 100); 1672 if (!dev->mode_config.tv_left_margin_property) 1673 goto nomem; 1674 1675 dev->mode_config.tv_right_margin_property = 1676 drm_property_create_range(dev, 0, "right margin", 0, 100); 1677 if (!dev->mode_config.tv_right_margin_property) 1678 goto nomem; 1679 1680 dev->mode_config.tv_top_margin_property = 1681 drm_property_create_range(dev, 0, "top margin", 0, 100); 1682 if (!dev->mode_config.tv_top_margin_property) 1683 goto nomem; 1684 1685 dev->mode_config.tv_bottom_margin_property = 1686 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1687 if (!dev->mode_config.tv_bottom_margin_property) 1688 goto nomem; 1689 1690 dev->mode_config.tv_mode_property = 1691 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1692 "mode", num_modes); 1693 if (!dev->mode_config.tv_mode_property) 1694 goto nomem; 1695 1696 for (i = 0; i < num_modes; i++) 1697 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1698 i, modes[i]); 1699 1700 dev->mode_config.tv_brightness_property = 1701 drm_property_create_range(dev, 0, "brightness", 0, 100); 1702 if (!dev->mode_config.tv_brightness_property) 1703 goto nomem; 1704 1705 dev->mode_config.tv_contrast_property = 1706 drm_property_create_range(dev, 0, "contrast", 0, 100); 1707 if (!dev->mode_config.tv_contrast_property) 1708 goto nomem; 1709 1710 dev->mode_config.tv_flicker_reduction_property = 1711 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1712 if (!dev->mode_config.tv_flicker_reduction_property) 1713 goto nomem; 1714 1715 dev->mode_config.tv_overscan_property = 1716 drm_property_create_range(dev, 0, "overscan", 0, 100); 1717 if (!dev->mode_config.tv_overscan_property) 1718 goto nomem; 1719 1720 dev->mode_config.tv_saturation_property = 1721 drm_property_create_range(dev, 0, "saturation", 0, 100); 1722 if (!dev->mode_config.tv_saturation_property) 1723 goto nomem; 1724 1725 dev->mode_config.tv_hue_property = 1726 drm_property_create_range(dev, 0, "hue", 0, 100); 1727 if (!dev->mode_config.tv_hue_property) 1728 goto nomem; 1729 1730 return 0; 1731 nomem: 1732 return -ENOMEM; 1733 } 1734 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1735 1736 /** 1737 * drm_mode_create_scaling_mode_property - create scaling mode property 1738 * @dev: DRM device 1739 * 1740 * Called by a driver the first time it's needed, must be attached to desired 1741 * connectors. 1742 */ 1743 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1744 { 1745 struct drm_property *scaling_mode; 1746 1747 if (dev->mode_config.scaling_mode_property) 1748 return 0; 1749 1750 scaling_mode = 1751 drm_property_create_enum(dev, 0, "scaling mode", 1752 drm_scaling_mode_enum_list, 1753 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1754 1755 dev->mode_config.scaling_mode_property = scaling_mode; 1756 1757 return 0; 1758 } 1759 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1760 1761 /** 1762 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1763 * @dev: DRM device 1764 * 1765 * Called by a driver the first time it's needed, must be attached to desired 1766 * connectors. 1767 * 1768 * Returns: 1769 * Zero on success, negative errno on failure. 1770 */ 1771 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1772 { 1773 if (dev->mode_config.aspect_ratio_property) 1774 return 0; 1775 1776 dev->mode_config.aspect_ratio_property = 1777 drm_property_create_enum(dev, 0, "aspect ratio", 1778 drm_aspect_ratio_enum_list, 1779 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1780 1781 if (dev->mode_config.aspect_ratio_property == NULL) 1782 return -ENOMEM; 1783 1784 return 0; 1785 } 1786 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1787 1788 /** 1789 * drm_mode_create_dirty_property - create dirty property 1790 * @dev: DRM device 1791 * 1792 * Called by a driver the first time it's needed, must be attached to desired 1793 * connectors. 1794 */ 1795 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1796 { 1797 struct drm_property *dirty_info; 1798 1799 if (dev->mode_config.dirty_info_property) 1800 return 0; 1801 1802 dirty_info = 1803 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1804 "dirty", 1805 drm_dirty_info_enum_list, 1806 ARRAY_SIZE(drm_dirty_info_enum_list)); 1807 dev->mode_config.dirty_info_property = dirty_info; 1808 1809 return 0; 1810 } 1811 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1812 1813 /** 1814 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1815 * @dev: DRM device 1816 * 1817 * Create the the suggested x/y offset property for connectors. 1818 */ 1819 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1820 { 1821 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1822 return 0; 1823 1824 dev->mode_config.suggested_x_property = 1825 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1826 1827 dev->mode_config.suggested_y_property = 1828 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1829 1830 if (dev->mode_config.suggested_x_property == NULL || 1831 dev->mode_config.suggested_y_property == NULL) 1832 return -ENOMEM; 1833 return 0; 1834 } 1835 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1836 1837 /** 1838 * drm_mode_getresources - get graphics configuration 1839 * @dev: drm device for the ioctl 1840 * @data: data pointer for the ioctl 1841 * @file_priv: drm file for the ioctl call 1842 * 1843 * Construct a set of configuration description structures and return 1844 * them to the user, including CRTC, connector and framebuffer configuration. 1845 * 1846 * Called by the user via ioctl. 1847 * 1848 * Returns: 1849 * Zero on success, negative errno on failure. 1850 */ 1851 int drm_mode_getresources(struct drm_device *dev, void *data, 1852 struct drm_file *file_priv) 1853 { 1854 struct drm_mode_card_res *card_res = data; 1855 struct list_head *lh; 1856 struct drm_framebuffer *fb; 1857 struct drm_connector *connector; 1858 struct drm_crtc *crtc; 1859 struct drm_encoder *encoder; 1860 int ret = 0; 1861 int connector_count = 0; 1862 int crtc_count = 0; 1863 int fb_count = 0; 1864 int encoder_count = 0; 1865 int copied = 0; 1866 uint32_t __user *fb_id; 1867 uint32_t __user *crtc_id; 1868 uint32_t __user *connector_id; 1869 uint32_t __user *encoder_id; 1870 1871 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1872 return -EINVAL; 1873 1874 1875 mutex_lock(&file_priv->fbs_lock); 1876 /* 1877 * For the non-control nodes we need to limit the list of resources 1878 * by IDs in the group list for this node 1879 */ 1880 list_for_each(lh, &file_priv->fbs) 1881 fb_count++; 1882 1883 /* handle this in 4 parts */ 1884 /* FBs */ 1885 if (card_res->count_fbs >= fb_count) { 1886 copied = 0; 1887 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1888 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1889 if (put_user(fb->base.id, fb_id + copied)) { 1890 mutex_unlock(&file_priv->fbs_lock); 1891 return -EFAULT; 1892 } 1893 copied++; 1894 } 1895 } 1896 card_res->count_fbs = fb_count; 1897 mutex_unlock(&file_priv->fbs_lock); 1898 1899 /* mode_config.mutex protects the connector list against e.g. DP MST 1900 * connector hot-adding. CRTC/Plane lists are invariant. */ 1901 mutex_lock(&dev->mode_config.mutex); 1902 drm_for_each_crtc(crtc, dev) 1903 crtc_count++; 1904 1905 drm_for_each_connector(connector, dev) 1906 connector_count++; 1907 1908 drm_for_each_encoder(encoder, dev) 1909 encoder_count++; 1910 1911 card_res->max_height = dev->mode_config.max_height; 1912 card_res->min_height = dev->mode_config.min_height; 1913 card_res->max_width = dev->mode_config.max_width; 1914 card_res->min_width = dev->mode_config.min_width; 1915 1916 /* CRTCs */ 1917 if (card_res->count_crtcs >= crtc_count) { 1918 copied = 0; 1919 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1920 drm_for_each_crtc(crtc, dev) { 1921 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", 1922 crtc->base.id, crtc->name); 1923 if (put_user(crtc->base.id, crtc_id + copied)) { 1924 ret = -EFAULT; 1925 goto out; 1926 } 1927 copied++; 1928 } 1929 } 1930 card_res->count_crtcs = crtc_count; 1931 1932 /* Encoders */ 1933 if (card_res->count_encoders >= encoder_count) { 1934 copied = 0; 1935 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1936 drm_for_each_encoder(encoder, dev) { 1937 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1938 encoder->name); 1939 if (put_user(encoder->base.id, encoder_id + 1940 copied)) { 1941 ret = -EFAULT; 1942 goto out; 1943 } 1944 copied++; 1945 } 1946 } 1947 card_res->count_encoders = encoder_count; 1948 1949 /* Connectors */ 1950 if (card_res->count_connectors >= connector_count) { 1951 copied = 0; 1952 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1953 drm_for_each_connector(connector, dev) { 1954 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1955 connector->base.id, 1956 connector->name); 1957 if (put_user(connector->base.id, 1958 connector_id + copied)) { 1959 ret = -EFAULT; 1960 goto out; 1961 } 1962 copied++; 1963 } 1964 } 1965 card_res->count_connectors = connector_count; 1966 1967 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1968 card_res->count_connectors, card_res->count_encoders); 1969 1970 out: 1971 mutex_unlock(&dev->mode_config.mutex); 1972 return ret; 1973 } 1974 1975 /** 1976 * drm_mode_getcrtc - get CRTC configuration 1977 * @dev: drm device for the ioctl 1978 * @data: data pointer for the ioctl 1979 * @file_priv: drm file for the ioctl call 1980 * 1981 * Construct a CRTC configuration structure to return to the user. 1982 * 1983 * Called by the user via ioctl. 1984 * 1985 * Returns: 1986 * Zero on success, negative errno on failure. 1987 */ 1988 int drm_mode_getcrtc(struct drm_device *dev, 1989 void *data, struct drm_file *file_priv) 1990 { 1991 struct drm_mode_crtc *crtc_resp = data; 1992 struct drm_crtc *crtc; 1993 1994 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1995 return -EINVAL; 1996 1997 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 1998 if (!crtc) 1999 return -ENOENT; 2000 2001 drm_modeset_lock_crtc(crtc, crtc->primary); 2002 crtc_resp->gamma_size = crtc->gamma_size; 2003 if (crtc->primary->fb) 2004 crtc_resp->fb_id = crtc->primary->fb->base.id; 2005 else 2006 crtc_resp->fb_id = 0; 2007 2008 if (crtc->state) { 2009 crtc_resp->x = crtc->primary->state->src_x >> 16; 2010 crtc_resp->y = crtc->primary->state->src_y >> 16; 2011 if (crtc->state->enable) { 2012 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); 2013 crtc_resp->mode_valid = 1; 2014 2015 } else { 2016 crtc_resp->mode_valid = 0; 2017 } 2018 } else { 2019 crtc_resp->x = crtc->x; 2020 crtc_resp->y = crtc->y; 2021 if (crtc->enabled) { 2022 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); 2023 crtc_resp->mode_valid = 1; 2024 2025 } else { 2026 crtc_resp->mode_valid = 0; 2027 } 2028 } 2029 drm_modeset_unlock_crtc(crtc); 2030 2031 return 0; 2032 } 2033 2034 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 2035 const struct drm_file *file_priv) 2036 { 2037 /* 2038 * If user-space hasn't configured the driver to expose the stereo 3D 2039 * modes, don't expose them. 2040 */ 2041 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 2042 return false; 2043 2044 return true; 2045 } 2046 2047 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 2048 { 2049 /* For atomic drivers only state objects are synchronously updated and 2050 * protected by modeset locks, so check those first. */ 2051 if (connector->state) 2052 return connector->state->best_encoder; 2053 return connector->encoder; 2054 } 2055 2056 /* helper for getconnector and getproperties ioctls */ 2057 static int get_properties(struct drm_mode_object *obj, bool atomic, 2058 uint32_t __user *prop_ptr, uint64_t __user *prop_values, 2059 uint32_t *arg_count_props) 2060 { 2061 int props_count; 2062 int i, ret, copied; 2063 2064 props_count = obj->properties->count; 2065 if (!atomic) 2066 props_count -= obj->properties->atomic_count; 2067 2068 if ((*arg_count_props >= props_count) && props_count) { 2069 for (i = 0, copied = 0; copied < props_count; i++) { 2070 struct drm_property *prop = obj->properties->properties[i]; 2071 uint64_t val; 2072 2073 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) 2074 continue; 2075 2076 ret = drm_object_property_get_value(obj, prop, &val); 2077 if (ret) 2078 return ret; 2079 2080 if (put_user(prop->base.id, prop_ptr + copied)) 2081 return -EFAULT; 2082 2083 if (put_user(val, prop_values + copied)) 2084 return -EFAULT; 2085 2086 copied++; 2087 } 2088 } 2089 *arg_count_props = props_count; 2090 2091 return 0; 2092 } 2093 2094 /** 2095 * drm_mode_getconnector - get connector configuration 2096 * @dev: drm device for the ioctl 2097 * @data: data pointer for the ioctl 2098 * @file_priv: drm file for the ioctl call 2099 * 2100 * Construct a connector configuration structure to return to the user. 2101 * 2102 * Called by the user via ioctl. 2103 * 2104 * Returns: 2105 * Zero on success, negative errno on failure. 2106 */ 2107 int drm_mode_getconnector(struct drm_device *dev, void *data, 2108 struct drm_file *file_priv) 2109 { 2110 struct drm_mode_get_connector *out_resp = data; 2111 struct drm_connector *connector; 2112 struct drm_encoder *encoder; 2113 struct drm_display_mode *mode; 2114 int mode_count = 0; 2115 int encoders_count = 0; 2116 int ret = 0; 2117 int copied = 0; 2118 int i; 2119 struct drm_mode_modeinfo u_mode; 2120 struct drm_mode_modeinfo __user *mode_ptr; 2121 uint32_t __user *encoder_ptr; 2122 2123 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2124 return -EINVAL; 2125 2126 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2127 2128 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 2129 2130 mutex_lock(&dev->mode_config.mutex); 2131 2132 connector = drm_connector_find(dev, out_resp->connector_id); 2133 if (!connector) { 2134 ret = -ENOENT; 2135 goto out_unlock; 2136 } 2137 2138 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) 2139 if (connector->encoder_ids[i] != 0) 2140 encoders_count++; 2141 2142 if (out_resp->count_modes == 0) { 2143 connector->funcs->fill_modes(connector, 2144 dev->mode_config.max_width, 2145 dev->mode_config.max_height); 2146 } 2147 2148 /* delayed so we get modes regardless of pre-fill_modes state */ 2149 list_for_each_entry(mode, &connector->modes, head) 2150 if (drm_mode_expose_to_userspace(mode, file_priv)) 2151 mode_count++; 2152 2153 out_resp->connector_id = connector->base.id; 2154 out_resp->connector_type = connector->connector_type; 2155 out_resp->connector_type_id = connector->connector_type_id; 2156 out_resp->mm_width = connector->display_info.width_mm; 2157 out_resp->mm_height = connector->display_info.height_mm; 2158 out_resp->subpixel = connector->display_info.subpixel_order; 2159 out_resp->connection = connector->status; 2160 2161 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2162 encoder = drm_connector_get_encoder(connector); 2163 if (encoder) 2164 out_resp->encoder_id = encoder->base.id; 2165 else 2166 out_resp->encoder_id = 0; 2167 2168 /* 2169 * This ioctl is called twice, once to determine how much space is 2170 * needed, and the 2nd time to fill it. 2171 */ 2172 if ((out_resp->count_modes >= mode_count) && mode_count) { 2173 copied = 0; 2174 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2175 list_for_each_entry(mode, &connector->modes, head) { 2176 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2177 continue; 2178 2179 drm_mode_convert_to_umode(&u_mode, mode); 2180 if (copy_to_user(mode_ptr + copied, 2181 &u_mode, sizeof(u_mode))) { 2182 ret = -EFAULT; 2183 goto out; 2184 } 2185 copied++; 2186 } 2187 } 2188 out_resp->count_modes = mode_count; 2189 2190 ret = get_properties(&connector->base, file_priv->atomic, 2191 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2192 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2193 &out_resp->count_props); 2194 if (ret) 2195 goto out; 2196 2197 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2198 copied = 0; 2199 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2200 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2201 if (connector->encoder_ids[i] != 0) { 2202 if (put_user(connector->encoder_ids[i], 2203 encoder_ptr + copied)) { 2204 ret = -EFAULT; 2205 goto out; 2206 } 2207 copied++; 2208 } 2209 } 2210 } 2211 out_resp->count_encoders = encoders_count; 2212 2213 out: 2214 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2215 2216 out_unlock: 2217 mutex_unlock(&dev->mode_config.mutex); 2218 2219 return ret; 2220 } 2221 2222 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2223 { 2224 struct drm_connector *connector; 2225 struct drm_device *dev = encoder->dev; 2226 bool uses_atomic = false; 2227 2228 /* For atomic drivers only state objects are synchronously updated and 2229 * protected by modeset locks, so check those first. */ 2230 drm_for_each_connector(connector, dev) { 2231 if (!connector->state) 2232 continue; 2233 2234 uses_atomic = true; 2235 2236 if (connector->state->best_encoder != encoder) 2237 continue; 2238 2239 return connector->state->crtc; 2240 } 2241 2242 /* Don't return stale data (e.g. pending async disable). */ 2243 if (uses_atomic) 2244 return NULL; 2245 2246 return encoder->crtc; 2247 } 2248 2249 /** 2250 * drm_mode_getencoder - get encoder configuration 2251 * @dev: drm device for the ioctl 2252 * @data: data pointer for the ioctl 2253 * @file_priv: drm file for the ioctl call 2254 * 2255 * Construct a encoder configuration structure to return to the user. 2256 * 2257 * Called by the user via ioctl. 2258 * 2259 * Returns: 2260 * Zero on success, negative errno on failure. 2261 */ 2262 int drm_mode_getencoder(struct drm_device *dev, void *data, 2263 struct drm_file *file_priv) 2264 { 2265 struct drm_mode_get_encoder *enc_resp = data; 2266 struct drm_encoder *encoder; 2267 struct drm_crtc *crtc; 2268 2269 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2270 return -EINVAL; 2271 2272 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2273 if (!encoder) 2274 return -ENOENT; 2275 2276 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2277 crtc = drm_encoder_get_crtc(encoder); 2278 if (crtc) 2279 enc_resp->crtc_id = crtc->base.id; 2280 else 2281 enc_resp->crtc_id = 0; 2282 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2283 2284 enc_resp->encoder_type = encoder->encoder_type; 2285 enc_resp->encoder_id = encoder->base.id; 2286 enc_resp->possible_crtcs = encoder->possible_crtcs; 2287 enc_resp->possible_clones = encoder->possible_clones; 2288 2289 return 0; 2290 } 2291 2292 /** 2293 * drm_mode_getplane_res - enumerate all plane resources 2294 * @dev: DRM device 2295 * @data: ioctl data 2296 * @file_priv: DRM file info 2297 * 2298 * Construct a list of plane ids to return to the user. 2299 * 2300 * Called by the user via ioctl. 2301 * 2302 * Returns: 2303 * Zero on success, negative errno on failure. 2304 */ 2305 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2306 struct drm_file *file_priv) 2307 { 2308 struct drm_mode_get_plane_res *plane_resp = data; 2309 struct drm_mode_config *config; 2310 struct drm_plane *plane; 2311 uint32_t __user *plane_ptr; 2312 int copied = 0; 2313 unsigned num_planes; 2314 2315 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2316 return -EINVAL; 2317 2318 config = &dev->mode_config; 2319 2320 if (file_priv->universal_planes) 2321 num_planes = config->num_total_plane; 2322 else 2323 num_planes = config->num_overlay_plane; 2324 2325 /* 2326 * This ioctl is called twice, once to determine how much space is 2327 * needed, and the 2nd time to fill it. 2328 */ 2329 if (num_planes && 2330 (plane_resp->count_planes >= num_planes)) { 2331 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2332 2333 /* Plane lists are invariant, no locking needed. */ 2334 drm_for_each_plane(plane, dev) { 2335 /* 2336 * Unless userspace set the 'universal planes' 2337 * capability bit, only advertise overlays. 2338 */ 2339 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2340 !file_priv->universal_planes) 2341 continue; 2342 2343 if (put_user(plane->base.id, plane_ptr + copied)) 2344 return -EFAULT; 2345 copied++; 2346 } 2347 } 2348 plane_resp->count_planes = num_planes; 2349 2350 return 0; 2351 } 2352 2353 /** 2354 * drm_mode_getplane - get plane configuration 2355 * @dev: DRM device 2356 * @data: ioctl data 2357 * @file_priv: DRM file info 2358 * 2359 * Construct a plane configuration structure to return to the user. 2360 * 2361 * Called by the user via ioctl. 2362 * 2363 * Returns: 2364 * Zero on success, negative errno on failure. 2365 */ 2366 int drm_mode_getplane(struct drm_device *dev, void *data, 2367 struct drm_file *file_priv) 2368 { 2369 struct drm_mode_get_plane *plane_resp = data; 2370 struct drm_plane *plane; 2371 uint32_t __user *format_ptr; 2372 2373 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2374 return -EINVAL; 2375 2376 plane = drm_plane_find(dev, plane_resp->plane_id); 2377 if (!plane) 2378 return -ENOENT; 2379 2380 drm_modeset_lock(&plane->mutex, NULL); 2381 if (plane->crtc) 2382 plane_resp->crtc_id = plane->crtc->base.id; 2383 else 2384 plane_resp->crtc_id = 0; 2385 2386 if (plane->fb) 2387 plane_resp->fb_id = plane->fb->base.id; 2388 else 2389 plane_resp->fb_id = 0; 2390 drm_modeset_unlock(&plane->mutex); 2391 2392 plane_resp->plane_id = plane->base.id; 2393 plane_resp->possible_crtcs = plane->possible_crtcs; 2394 plane_resp->gamma_size = 0; 2395 2396 /* 2397 * This ioctl is called twice, once to determine how much space is 2398 * needed, and the 2nd time to fill it. 2399 */ 2400 if (plane->format_count && 2401 (plane_resp->count_format_types >= plane->format_count)) { 2402 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2403 if (copy_to_user(format_ptr, 2404 plane->format_types, 2405 sizeof(uint32_t) * plane->format_count)) { 2406 return -EFAULT; 2407 } 2408 } 2409 plane_resp->count_format_types = plane->format_count; 2410 2411 return 0; 2412 } 2413 2414 /** 2415 * drm_plane_check_pixel_format - Check if the plane supports the pixel format 2416 * @plane: plane to check for format support 2417 * @format: the pixel format 2418 * 2419 * Returns: 2420 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL 2421 * otherwise. 2422 */ 2423 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format) 2424 { 2425 unsigned int i; 2426 2427 for (i = 0; i < plane->format_count; i++) { 2428 if (format == plane->format_types[i]) 2429 return 0; 2430 } 2431 2432 return -EINVAL; 2433 } 2434 2435 static int check_src_coords(uint32_t src_x, uint32_t src_y, 2436 uint32_t src_w, uint32_t src_h, 2437 const struct drm_framebuffer *fb) 2438 { 2439 unsigned int fb_width, fb_height; 2440 2441 fb_width = fb->width << 16; 2442 fb_height = fb->height << 16; 2443 2444 /* Make sure source coordinates are inside the fb. */ 2445 if (src_w > fb_width || 2446 src_x > fb_width - src_w || 2447 src_h > fb_height || 2448 src_y > fb_height - src_h) { 2449 DRM_DEBUG_KMS("Invalid source coordinates " 2450 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2451 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2452 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2453 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2454 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2455 return -ENOSPC; 2456 } 2457 2458 return 0; 2459 } 2460 2461 /* 2462 * setplane_internal - setplane handler for internal callers 2463 * 2464 * Note that we assume an extra reference has already been taken on fb. If the 2465 * update fails, this reference will be dropped before return; if it succeeds, 2466 * the previous framebuffer (if any) will be unreferenced instead. 2467 * 2468 * src_{x,y,w,h} are provided in 16.16 fixed point format 2469 */ 2470 static int __setplane_internal(struct drm_plane *plane, 2471 struct drm_crtc *crtc, 2472 struct drm_framebuffer *fb, 2473 int32_t crtc_x, int32_t crtc_y, 2474 uint32_t crtc_w, uint32_t crtc_h, 2475 /* src_{x,y,w,h} values are 16.16 fixed point */ 2476 uint32_t src_x, uint32_t src_y, 2477 uint32_t src_w, uint32_t src_h) 2478 { 2479 int ret = 0; 2480 2481 /* No fb means shut it down */ 2482 if (!fb) { 2483 plane->old_fb = plane->fb; 2484 ret = plane->funcs->disable_plane(plane); 2485 if (!ret) { 2486 plane->crtc = NULL; 2487 plane->fb = NULL; 2488 } else { 2489 plane->old_fb = NULL; 2490 } 2491 goto out; 2492 } 2493 2494 /* Check whether this plane is usable on this CRTC */ 2495 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2496 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2497 ret = -EINVAL; 2498 goto out; 2499 } 2500 2501 /* Check whether this plane supports the fb pixel format. */ 2502 ret = drm_plane_check_pixel_format(plane, fb->pixel_format); 2503 if (ret) { 2504 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2505 drm_get_format_name(fb->pixel_format)); 2506 goto out; 2507 } 2508 2509 /* Give drivers some help against integer overflows */ 2510 if (crtc_w > INT_MAX || 2511 crtc_x > INT_MAX - (int32_t) crtc_w || 2512 crtc_h > INT_MAX || 2513 crtc_y > INT_MAX - (int32_t) crtc_h) { 2514 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2515 crtc_w, crtc_h, crtc_x, crtc_y); 2516 ret = -ERANGE; 2517 goto out; 2518 } 2519 2520 ret = check_src_coords(src_x, src_y, src_w, src_h, fb); 2521 if (ret) 2522 goto out; 2523 2524 plane->old_fb = plane->fb; 2525 ret = plane->funcs->update_plane(plane, crtc, fb, 2526 crtc_x, crtc_y, crtc_w, crtc_h, 2527 src_x, src_y, src_w, src_h); 2528 if (!ret) { 2529 plane->crtc = crtc; 2530 plane->fb = fb; 2531 fb = NULL; 2532 } else { 2533 plane->old_fb = NULL; 2534 } 2535 2536 out: 2537 if (fb) 2538 drm_framebuffer_unreference(fb); 2539 if (plane->old_fb) 2540 drm_framebuffer_unreference(plane->old_fb); 2541 plane->old_fb = NULL; 2542 2543 return ret; 2544 } 2545 2546 static int setplane_internal(struct drm_plane *plane, 2547 struct drm_crtc *crtc, 2548 struct drm_framebuffer *fb, 2549 int32_t crtc_x, int32_t crtc_y, 2550 uint32_t crtc_w, uint32_t crtc_h, 2551 /* src_{x,y,w,h} values are 16.16 fixed point */ 2552 uint32_t src_x, uint32_t src_y, 2553 uint32_t src_w, uint32_t src_h) 2554 { 2555 int ret; 2556 2557 drm_modeset_lock_all(plane->dev); 2558 ret = __setplane_internal(plane, crtc, fb, 2559 crtc_x, crtc_y, crtc_w, crtc_h, 2560 src_x, src_y, src_w, src_h); 2561 drm_modeset_unlock_all(plane->dev); 2562 2563 return ret; 2564 } 2565 2566 /** 2567 * drm_mode_setplane - configure a plane's configuration 2568 * @dev: DRM device 2569 * @data: ioctl data* 2570 * @file_priv: DRM file info 2571 * 2572 * Set plane configuration, including placement, fb, scaling, and other factors. 2573 * Or pass a NULL fb to disable (planes may be disabled without providing a 2574 * valid crtc). 2575 * 2576 * Returns: 2577 * Zero on success, negative errno on failure. 2578 */ 2579 int drm_mode_setplane(struct drm_device *dev, void *data, 2580 struct drm_file *file_priv) 2581 { 2582 struct drm_mode_set_plane *plane_req = data; 2583 struct drm_plane *plane; 2584 struct drm_crtc *crtc = NULL; 2585 struct drm_framebuffer *fb = NULL; 2586 2587 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2588 return -EINVAL; 2589 2590 /* 2591 * First, find the plane, crtc, and fb objects. If not available, 2592 * we don't bother to call the driver. 2593 */ 2594 plane = drm_plane_find(dev, plane_req->plane_id); 2595 if (!plane) { 2596 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2597 plane_req->plane_id); 2598 return -ENOENT; 2599 } 2600 2601 if (plane_req->fb_id) { 2602 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2603 if (!fb) { 2604 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2605 plane_req->fb_id); 2606 return -ENOENT; 2607 } 2608 2609 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2610 if (!crtc) { 2611 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2612 plane_req->crtc_id); 2613 return -ENOENT; 2614 } 2615 } 2616 2617 /* 2618 * setplane_internal will take care of deref'ing either the old or new 2619 * framebuffer depending on success. 2620 */ 2621 return setplane_internal(plane, crtc, fb, 2622 plane_req->crtc_x, plane_req->crtc_y, 2623 plane_req->crtc_w, plane_req->crtc_h, 2624 plane_req->src_x, plane_req->src_y, 2625 plane_req->src_w, plane_req->src_h); 2626 } 2627 2628 /** 2629 * drm_mode_set_config_internal - helper to call ->set_config 2630 * @set: modeset config to set 2631 * 2632 * This is a little helper to wrap internal calls to the ->set_config driver 2633 * interface. The only thing it adds is correct refcounting dance. 2634 * 2635 * Returns: 2636 * Zero on success, negative errno on failure. 2637 */ 2638 int drm_mode_set_config_internal(struct drm_mode_set *set) 2639 { 2640 struct drm_crtc *crtc = set->crtc; 2641 struct drm_framebuffer *fb; 2642 struct drm_crtc *tmp; 2643 int ret; 2644 2645 /* 2646 * NOTE: ->set_config can also disable other crtcs (if we steal all 2647 * connectors from it), hence we need to refcount the fbs across all 2648 * crtcs. Atomic modeset will have saner semantics ... 2649 */ 2650 drm_for_each_crtc(tmp, crtc->dev) 2651 tmp->primary->old_fb = tmp->primary->fb; 2652 2653 fb = set->fb; 2654 2655 ret = crtc->funcs->set_config(set); 2656 if (ret == 0) { 2657 crtc->primary->crtc = crtc; 2658 crtc->primary->fb = fb; 2659 } 2660 2661 drm_for_each_crtc(tmp, crtc->dev) { 2662 if (tmp->primary->fb) 2663 drm_framebuffer_reference(tmp->primary->fb); 2664 if (tmp->primary->old_fb) 2665 drm_framebuffer_unreference(tmp->primary->old_fb); 2666 tmp->primary->old_fb = NULL; 2667 } 2668 2669 return ret; 2670 } 2671 EXPORT_SYMBOL(drm_mode_set_config_internal); 2672 2673 /** 2674 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode 2675 * @mode: mode to query 2676 * @hdisplay: hdisplay value to fill in 2677 * @vdisplay: vdisplay value to fill in 2678 * 2679 * The vdisplay value will be doubled if the specified mode is a stereo mode of 2680 * the appropriate layout. 2681 */ 2682 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, 2683 int *hdisplay, int *vdisplay) 2684 { 2685 struct drm_display_mode adjusted; 2686 2687 drm_mode_copy(&adjusted, mode); 2688 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 2689 *hdisplay = adjusted.crtc_hdisplay; 2690 *vdisplay = adjusted.crtc_vdisplay; 2691 } 2692 EXPORT_SYMBOL(drm_crtc_get_hv_timing); 2693 2694 /** 2695 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2696 * CRTC viewport 2697 * @crtc: CRTC that framebuffer will be displayed on 2698 * @x: x panning 2699 * @y: y panning 2700 * @mode: mode that framebuffer will be displayed under 2701 * @fb: framebuffer to check size of 2702 */ 2703 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2704 int x, int y, 2705 const struct drm_display_mode *mode, 2706 const struct drm_framebuffer *fb) 2707 2708 { 2709 int hdisplay, vdisplay; 2710 2711 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); 2712 2713 if (crtc->state && 2714 crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) | 2715 BIT(DRM_ROTATE_270))) 2716 swap(hdisplay, vdisplay); 2717 2718 return check_src_coords(x << 16, y << 16, 2719 hdisplay << 16, vdisplay << 16, fb); 2720 } 2721 EXPORT_SYMBOL(drm_crtc_check_viewport); 2722 2723 /** 2724 * drm_mode_setcrtc - set CRTC configuration 2725 * @dev: drm device for the ioctl 2726 * @data: data pointer for the ioctl 2727 * @file_priv: drm file for the ioctl call 2728 * 2729 * Build a new CRTC configuration based on user request. 2730 * 2731 * Called by the user via ioctl. 2732 * 2733 * Returns: 2734 * Zero on success, negative errno on failure. 2735 */ 2736 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2737 struct drm_file *file_priv) 2738 { 2739 struct drm_mode_config *config = &dev->mode_config; 2740 struct drm_mode_crtc *crtc_req = data; 2741 struct drm_crtc *crtc; 2742 struct drm_connector **connector_set = NULL, *connector; 2743 struct drm_framebuffer *fb = NULL; 2744 struct drm_display_mode *mode = NULL; 2745 struct drm_mode_set set; 2746 uint32_t __user *set_connectors_ptr; 2747 int ret; 2748 int i; 2749 2750 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2751 return -EINVAL; 2752 2753 /* 2754 * Universal plane src offsets are only 16.16, prevent havoc for 2755 * drivers using universal plane code internally. 2756 */ 2757 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) 2758 return -ERANGE; 2759 2760 drm_modeset_lock_all(dev); 2761 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2762 if (!crtc) { 2763 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2764 ret = -ENOENT; 2765 goto out; 2766 } 2767 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); 2768 2769 if (crtc_req->mode_valid) { 2770 /* If we have a mode we need a framebuffer. */ 2771 /* If we pass -1, set the mode with the currently bound fb */ 2772 if (crtc_req->fb_id == -1) { 2773 if (!crtc->primary->fb) { 2774 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2775 ret = -EINVAL; 2776 goto out; 2777 } 2778 fb = crtc->primary->fb; 2779 /* Make refcounting symmetric with the lookup path. */ 2780 drm_framebuffer_reference(fb); 2781 } else { 2782 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2783 if (!fb) { 2784 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2785 crtc_req->fb_id); 2786 ret = -ENOENT; 2787 goto out; 2788 } 2789 } 2790 2791 mode = drm_mode_create(dev); 2792 if (!mode) { 2793 ret = -ENOMEM; 2794 goto out; 2795 } 2796 2797 ret = drm_mode_convert_umode(mode, &crtc_req->mode); 2798 if (ret) { 2799 DRM_DEBUG_KMS("Invalid mode\n"); 2800 goto out; 2801 } 2802 2803 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 2804 2805 /* 2806 * Check whether the primary plane supports the fb pixel format. 2807 * Drivers not implementing the universal planes API use a 2808 * default formats list provided by the DRM core which doesn't 2809 * match real hardware capabilities. Skip the check in that 2810 * case. 2811 */ 2812 if (!crtc->primary->format_default) { 2813 ret = drm_plane_check_pixel_format(crtc->primary, 2814 fb->pixel_format); 2815 if (ret) { 2816 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2817 drm_get_format_name(fb->pixel_format)); 2818 goto out; 2819 } 2820 } 2821 2822 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2823 mode, fb); 2824 if (ret) 2825 goto out; 2826 2827 } 2828 2829 if (crtc_req->count_connectors == 0 && mode) { 2830 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2831 ret = -EINVAL; 2832 goto out; 2833 } 2834 2835 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2836 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2837 crtc_req->count_connectors); 2838 ret = -EINVAL; 2839 goto out; 2840 } 2841 2842 if (crtc_req->count_connectors > 0) { 2843 u32 out_id; 2844 2845 /* Avoid unbounded kernel memory allocation */ 2846 if (crtc_req->count_connectors > config->num_connector) { 2847 ret = -EINVAL; 2848 goto out; 2849 } 2850 2851 connector_set = kmalloc_array(crtc_req->count_connectors, 2852 sizeof(struct drm_connector *), 2853 GFP_KERNEL); 2854 if (!connector_set) { 2855 ret = -ENOMEM; 2856 goto out; 2857 } 2858 2859 for (i = 0; i < crtc_req->count_connectors; i++) { 2860 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2861 if (get_user(out_id, &set_connectors_ptr[i])) { 2862 ret = -EFAULT; 2863 goto out; 2864 } 2865 2866 connector = drm_connector_find(dev, out_id); 2867 if (!connector) { 2868 DRM_DEBUG_KMS("Connector id %d unknown\n", 2869 out_id); 2870 ret = -ENOENT; 2871 goto out; 2872 } 2873 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2874 connector->base.id, 2875 connector->name); 2876 2877 connector_set[i] = connector; 2878 } 2879 } 2880 2881 set.crtc = crtc; 2882 set.x = crtc_req->x; 2883 set.y = crtc_req->y; 2884 set.mode = mode; 2885 set.connectors = connector_set; 2886 set.num_connectors = crtc_req->count_connectors; 2887 set.fb = fb; 2888 ret = drm_mode_set_config_internal(&set); 2889 2890 out: 2891 if (fb) 2892 drm_framebuffer_unreference(fb); 2893 2894 kfree(connector_set); 2895 drm_mode_destroy(dev, mode); 2896 drm_modeset_unlock_all(dev); 2897 return ret; 2898 } 2899 2900 /** 2901 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2902 * universal plane handler call 2903 * @crtc: crtc to update cursor for 2904 * @req: data pointer for the ioctl 2905 * @file_priv: drm file for the ioctl call 2906 * 2907 * Legacy cursor ioctl's work directly with driver buffer handles. To 2908 * translate legacy ioctl calls into universal plane handler calls, we need to 2909 * wrap the native buffer handle in a drm_framebuffer. 2910 * 2911 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2912 * buffer with a pitch of 4*width; the universal plane interface should be used 2913 * directly in cases where the hardware can support other buffer settings and 2914 * userspace wants to make use of these capabilities. 2915 * 2916 * Returns: 2917 * Zero on success, negative errno on failure. 2918 */ 2919 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2920 struct drm_mode_cursor2 *req, 2921 struct drm_file *file_priv) 2922 { 2923 struct drm_device *dev = crtc->dev; 2924 struct drm_framebuffer *fb = NULL; 2925 struct drm_mode_fb_cmd2 fbreq = { 2926 .width = req->width, 2927 .height = req->height, 2928 .pixel_format = DRM_FORMAT_ARGB8888, 2929 .pitches = { req->width * 4 }, 2930 .handles = { req->handle }, 2931 }; 2932 int32_t crtc_x, crtc_y; 2933 uint32_t crtc_w = 0, crtc_h = 0; 2934 uint32_t src_w = 0, src_h = 0; 2935 int ret = 0; 2936 2937 BUG_ON(!crtc->cursor); 2938 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2939 2940 /* 2941 * Obtain fb we'll be using (either new or existing) and take an extra 2942 * reference to it if fb != null. setplane will take care of dropping 2943 * the reference if the plane update fails. 2944 */ 2945 if (req->flags & DRM_MODE_CURSOR_BO) { 2946 if (req->handle) { 2947 fb = internal_framebuffer_create(dev, &fbreq, file_priv); 2948 if (IS_ERR(fb)) { 2949 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2950 return PTR_ERR(fb); 2951 } 2952 } else { 2953 fb = NULL; 2954 } 2955 } else { 2956 fb = crtc->cursor->fb; 2957 if (fb) 2958 drm_framebuffer_reference(fb); 2959 } 2960 2961 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2962 crtc_x = req->x; 2963 crtc_y = req->y; 2964 } else { 2965 crtc_x = crtc->cursor_x; 2966 crtc_y = crtc->cursor_y; 2967 } 2968 2969 if (fb) { 2970 crtc_w = fb->width; 2971 crtc_h = fb->height; 2972 src_w = fb->width << 16; 2973 src_h = fb->height << 16; 2974 } 2975 2976 /* 2977 * setplane_internal will take care of deref'ing either the old or new 2978 * framebuffer depending on success. 2979 */ 2980 ret = __setplane_internal(crtc->cursor, crtc, fb, 2981 crtc_x, crtc_y, crtc_w, crtc_h, 2982 0, 0, src_w, src_h); 2983 2984 /* Update successful; save new cursor position, if necessary */ 2985 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2986 crtc->cursor_x = req->x; 2987 crtc->cursor_y = req->y; 2988 } 2989 2990 return ret; 2991 } 2992 2993 static int drm_mode_cursor_common(struct drm_device *dev, 2994 struct drm_mode_cursor2 *req, 2995 struct drm_file *file_priv) 2996 { 2997 struct drm_crtc *crtc; 2998 int ret = 0; 2999 3000 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3001 return -EINVAL; 3002 3003 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 3004 return -EINVAL; 3005 3006 crtc = drm_crtc_find(dev, req->crtc_id); 3007 if (!crtc) { 3008 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 3009 return -ENOENT; 3010 } 3011 3012 /* 3013 * If this crtc has a universal cursor plane, call that plane's update 3014 * handler rather than using legacy cursor handlers. 3015 */ 3016 drm_modeset_lock_crtc(crtc, crtc->cursor); 3017 if (crtc->cursor) { 3018 ret = drm_mode_cursor_universal(crtc, req, file_priv); 3019 goto out; 3020 } 3021 3022 if (req->flags & DRM_MODE_CURSOR_BO) { 3023 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 3024 ret = -ENXIO; 3025 goto out; 3026 } 3027 /* Turns off the cursor if handle is 0 */ 3028 if (crtc->funcs->cursor_set2) 3029 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 3030 req->width, req->height, req->hot_x, req->hot_y); 3031 else 3032 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 3033 req->width, req->height); 3034 } 3035 3036 if (req->flags & DRM_MODE_CURSOR_MOVE) { 3037 if (crtc->funcs->cursor_move) { 3038 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 3039 } else { 3040 ret = -EFAULT; 3041 goto out; 3042 } 3043 } 3044 out: 3045 drm_modeset_unlock_crtc(crtc); 3046 3047 return ret; 3048 3049 } 3050 3051 3052 /** 3053 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 3054 * @dev: drm device for the ioctl 3055 * @data: data pointer for the ioctl 3056 * @file_priv: drm file for the ioctl call 3057 * 3058 * Set the cursor configuration based on user request. 3059 * 3060 * Called by the user via ioctl. 3061 * 3062 * Returns: 3063 * Zero on success, negative errno on failure. 3064 */ 3065 int drm_mode_cursor_ioctl(struct drm_device *dev, 3066 void *data, struct drm_file *file_priv) 3067 { 3068 struct drm_mode_cursor *req = data; 3069 struct drm_mode_cursor2 new_req; 3070 3071 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 3072 new_req.hot_x = new_req.hot_y = 0; 3073 3074 return drm_mode_cursor_common(dev, &new_req, file_priv); 3075 } 3076 3077 /** 3078 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 3079 * @dev: drm device for the ioctl 3080 * @data: data pointer for the ioctl 3081 * @file_priv: drm file for the ioctl call 3082 * 3083 * Set the cursor configuration based on user request. This implements the 2nd 3084 * version of the cursor ioctl, which allows userspace to additionally specify 3085 * the hotspot of the pointer. 3086 * 3087 * Called by the user via ioctl. 3088 * 3089 * Returns: 3090 * Zero on success, negative errno on failure. 3091 */ 3092 int drm_mode_cursor2_ioctl(struct drm_device *dev, 3093 void *data, struct drm_file *file_priv) 3094 { 3095 struct drm_mode_cursor2 *req = data; 3096 3097 return drm_mode_cursor_common(dev, req, file_priv); 3098 } 3099 3100 /** 3101 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 3102 * @bpp: bits per pixels 3103 * @depth: bit depth per pixel 3104 * 3105 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 3106 * Useful in fbdev emulation code, since that deals in those values. 3107 */ 3108 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 3109 { 3110 uint32_t fmt; 3111 3112 switch (bpp) { 3113 case 8: 3114 fmt = DRM_FORMAT_C8; 3115 break; 3116 case 16: 3117 if (depth == 15) 3118 fmt = DRM_FORMAT_XRGB1555; 3119 else 3120 fmt = DRM_FORMAT_RGB565; 3121 break; 3122 case 24: 3123 fmt = DRM_FORMAT_RGB888; 3124 break; 3125 case 32: 3126 if (depth == 24) 3127 fmt = DRM_FORMAT_XRGB8888; 3128 else if (depth == 30) 3129 fmt = DRM_FORMAT_XRGB2101010; 3130 else 3131 fmt = DRM_FORMAT_ARGB8888; 3132 break; 3133 default: 3134 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3135 fmt = DRM_FORMAT_XRGB8888; 3136 break; 3137 } 3138 3139 return fmt; 3140 } 3141 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3142 3143 /** 3144 * drm_mode_addfb - add an FB to the graphics configuration 3145 * @dev: drm device for the ioctl 3146 * @data: data pointer for the ioctl 3147 * @file_priv: drm file for the ioctl call 3148 * 3149 * Add a new FB to the specified CRTC, given a user request. This is the 3150 * original addfb ioctl which only supported RGB formats. 3151 * 3152 * Called by the user via ioctl. 3153 * 3154 * Returns: 3155 * Zero on success, negative errno on failure. 3156 */ 3157 int drm_mode_addfb(struct drm_device *dev, 3158 void *data, struct drm_file *file_priv) 3159 { 3160 struct drm_mode_fb_cmd *or = data; 3161 struct drm_mode_fb_cmd2 r = {}; 3162 int ret; 3163 3164 /* convert to new format and call new ioctl */ 3165 r.fb_id = or->fb_id; 3166 r.width = or->width; 3167 r.height = or->height; 3168 r.pitches[0] = or->pitch; 3169 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3170 r.handles[0] = or->handle; 3171 3172 ret = drm_mode_addfb2(dev, &r, file_priv); 3173 if (ret) 3174 return ret; 3175 3176 or->fb_id = r.fb_id; 3177 3178 return 0; 3179 } 3180 3181 static int format_check(const struct drm_mode_fb_cmd2 *r) 3182 { 3183 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3184 3185 switch (format) { 3186 case DRM_FORMAT_C8: 3187 case DRM_FORMAT_RGB332: 3188 case DRM_FORMAT_BGR233: 3189 case DRM_FORMAT_XRGB4444: 3190 case DRM_FORMAT_XBGR4444: 3191 case DRM_FORMAT_RGBX4444: 3192 case DRM_FORMAT_BGRX4444: 3193 case DRM_FORMAT_ARGB4444: 3194 case DRM_FORMAT_ABGR4444: 3195 case DRM_FORMAT_RGBA4444: 3196 case DRM_FORMAT_BGRA4444: 3197 case DRM_FORMAT_XRGB1555: 3198 case DRM_FORMAT_XBGR1555: 3199 case DRM_FORMAT_RGBX5551: 3200 case DRM_FORMAT_BGRX5551: 3201 case DRM_FORMAT_ARGB1555: 3202 case DRM_FORMAT_ABGR1555: 3203 case DRM_FORMAT_RGBA5551: 3204 case DRM_FORMAT_BGRA5551: 3205 case DRM_FORMAT_RGB565: 3206 case DRM_FORMAT_BGR565: 3207 case DRM_FORMAT_RGB888: 3208 case DRM_FORMAT_BGR888: 3209 case DRM_FORMAT_XRGB8888: 3210 case DRM_FORMAT_XBGR8888: 3211 case DRM_FORMAT_RGBX8888: 3212 case DRM_FORMAT_BGRX8888: 3213 case DRM_FORMAT_ARGB8888: 3214 case DRM_FORMAT_ABGR8888: 3215 case DRM_FORMAT_RGBA8888: 3216 case DRM_FORMAT_BGRA8888: 3217 case DRM_FORMAT_XRGB2101010: 3218 case DRM_FORMAT_XBGR2101010: 3219 case DRM_FORMAT_RGBX1010102: 3220 case DRM_FORMAT_BGRX1010102: 3221 case DRM_FORMAT_ARGB2101010: 3222 case DRM_FORMAT_ABGR2101010: 3223 case DRM_FORMAT_RGBA1010102: 3224 case DRM_FORMAT_BGRA1010102: 3225 case DRM_FORMAT_YUYV: 3226 case DRM_FORMAT_YVYU: 3227 case DRM_FORMAT_UYVY: 3228 case DRM_FORMAT_VYUY: 3229 case DRM_FORMAT_AYUV: 3230 case DRM_FORMAT_NV12: 3231 case DRM_FORMAT_NV21: 3232 case DRM_FORMAT_NV16: 3233 case DRM_FORMAT_NV61: 3234 case DRM_FORMAT_NV24: 3235 case DRM_FORMAT_NV42: 3236 case DRM_FORMAT_YUV410: 3237 case DRM_FORMAT_YVU410: 3238 case DRM_FORMAT_YUV411: 3239 case DRM_FORMAT_YVU411: 3240 case DRM_FORMAT_YUV420: 3241 case DRM_FORMAT_YVU420: 3242 case DRM_FORMAT_YUV422: 3243 case DRM_FORMAT_YVU422: 3244 case DRM_FORMAT_YUV444: 3245 case DRM_FORMAT_YVU444: 3246 return 0; 3247 default: 3248 DRM_DEBUG_KMS("invalid pixel format %s\n", 3249 drm_get_format_name(r->pixel_format)); 3250 return -EINVAL; 3251 } 3252 } 3253 3254 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3255 { 3256 int ret, hsub, vsub, num_planes, i; 3257 3258 ret = format_check(r); 3259 if (ret) { 3260 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3261 drm_get_format_name(r->pixel_format)); 3262 return ret; 3263 } 3264 3265 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3266 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3267 num_planes = drm_format_num_planes(r->pixel_format); 3268 3269 if (r->width == 0 || r->width % hsub) { 3270 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3271 return -EINVAL; 3272 } 3273 3274 if (r->height == 0 || r->height % vsub) { 3275 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3276 return -EINVAL; 3277 } 3278 3279 for (i = 0; i < num_planes; i++) { 3280 unsigned int width = r->width / (i != 0 ? hsub : 1); 3281 unsigned int height = r->height / (i != 0 ? vsub : 1); 3282 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3283 3284 if (!r->handles[i]) { 3285 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3286 return -EINVAL; 3287 } 3288 3289 if ((uint64_t) width * cpp > UINT_MAX) 3290 return -ERANGE; 3291 3292 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3293 return -ERANGE; 3294 3295 if (r->pitches[i] < width * cpp) { 3296 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3297 return -EINVAL; 3298 } 3299 3300 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { 3301 DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n", 3302 r->modifier[i], i); 3303 return -EINVAL; 3304 } 3305 3306 /* modifier specific checks: */ 3307 switch (r->modifier[i]) { 3308 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: 3309 /* NOTE: the pitch restriction may be lifted later if it turns 3310 * out that no hw has this restriction: 3311 */ 3312 if (r->pixel_format != DRM_FORMAT_NV12 || 3313 width % 128 || height % 32 || 3314 r->pitches[i] % 128) { 3315 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i); 3316 return -EINVAL; 3317 } 3318 break; 3319 3320 default: 3321 break; 3322 } 3323 } 3324 3325 for (i = num_planes; i < 4; i++) { 3326 if (r->modifier[i]) { 3327 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i); 3328 return -EINVAL; 3329 } 3330 3331 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ 3332 if (!(r->flags & DRM_MODE_FB_MODIFIERS)) 3333 continue; 3334 3335 if (r->handles[i]) { 3336 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i); 3337 return -EINVAL; 3338 } 3339 3340 if (r->pitches[i]) { 3341 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i); 3342 return -EINVAL; 3343 } 3344 3345 if (r->offsets[i]) { 3346 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i); 3347 return -EINVAL; 3348 } 3349 } 3350 3351 return 0; 3352 } 3353 3354 static struct drm_framebuffer * 3355 internal_framebuffer_create(struct drm_device *dev, 3356 const struct drm_mode_fb_cmd2 *r, 3357 struct drm_file *file_priv) 3358 { 3359 struct drm_mode_config *config = &dev->mode_config; 3360 struct drm_framebuffer *fb; 3361 int ret; 3362 3363 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { 3364 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3365 return ERR_PTR(-EINVAL); 3366 } 3367 3368 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3369 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3370 r->width, config->min_width, config->max_width); 3371 return ERR_PTR(-EINVAL); 3372 } 3373 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3374 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3375 r->height, config->min_height, config->max_height); 3376 return ERR_PTR(-EINVAL); 3377 } 3378 3379 if (r->flags & DRM_MODE_FB_MODIFIERS && 3380 !dev->mode_config.allow_fb_modifiers) { 3381 DRM_DEBUG_KMS("driver does not support fb modifiers\n"); 3382 return ERR_PTR(-EINVAL); 3383 } 3384 3385 ret = framebuffer_check(r); 3386 if (ret) 3387 return ERR_PTR(ret); 3388 3389 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3390 if (IS_ERR(fb)) { 3391 DRM_DEBUG_KMS("could not create framebuffer\n"); 3392 return fb; 3393 } 3394 3395 return fb; 3396 } 3397 3398 /** 3399 * drm_mode_addfb2 - add an FB to the graphics configuration 3400 * @dev: drm device for the ioctl 3401 * @data: data pointer for the ioctl 3402 * @file_priv: drm file for the ioctl call 3403 * 3404 * Add a new FB to the specified CRTC, given a user request with format. This is 3405 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3406 * and uses fourcc codes as pixel format specifiers. 3407 * 3408 * Called by the user via ioctl. 3409 * 3410 * Returns: 3411 * Zero on success, negative errno on failure. 3412 */ 3413 int drm_mode_addfb2(struct drm_device *dev, 3414 void *data, struct drm_file *file_priv) 3415 { 3416 struct drm_mode_fb_cmd2 *r = data; 3417 struct drm_framebuffer *fb; 3418 3419 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3420 return -EINVAL; 3421 3422 fb = internal_framebuffer_create(dev, r, file_priv); 3423 if (IS_ERR(fb)) 3424 return PTR_ERR(fb); 3425 3426 /* Transfer ownership to the filp for reaping on close */ 3427 3428 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3429 mutex_lock(&file_priv->fbs_lock); 3430 r->fb_id = fb->base.id; 3431 list_add(&fb->filp_head, &file_priv->fbs); 3432 mutex_unlock(&file_priv->fbs_lock); 3433 3434 return 0; 3435 } 3436 3437 /** 3438 * drm_mode_rmfb - remove an FB from the configuration 3439 * @dev: drm device for the ioctl 3440 * @data: data pointer for the ioctl 3441 * @file_priv: drm file for the ioctl call 3442 * 3443 * Remove the FB specified by the user. 3444 * 3445 * Called by the user via ioctl. 3446 * 3447 * Returns: 3448 * Zero on success, negative errno on failure. 3449 */ 3450 int drm_mode_rmfb(struct drm_device *dev, 3451 void *data, struct drm_file *file_priv) 3452 { 3453 struct drm_framebuffer *fb = NULL; 3454 struct drm_framebuffer *fbl = NULL; 3455 uint32_t *id = data; 3456 int found = 0; 3457 3458 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3459 return -EINVAL; 3460 3461 mutex_lock(&file_priv->fbs_lock); 3462 mutex_lock(&dev->mode_config.fb_lock); 3463 fb = __drm_framebuffer_lookup(dev, *id); 3464 if (!fb) 3465 goto fail_lookup; 3466 3467 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3468 if (fb == fbl) 3469 found = 1; 3470 if (!found) 3471 goto fail_lookup; 3472 3473 list_del_init(&fb->filp_head); 3474 mutex_unlock(&dev->mode_config.fb_lock); 3475 mutex_unlock(&file_priv->fbs_lock); 3476 3477 drm_framebuffer_unreference(fb); 3478 3479 return 0; 3480 3481 fail_lookup: 3482 mutex_unlock(&dev->mode_config.fb_lock); 3483 mutex_unlock(&file_priv->fbs_lock); 3484 3485 return -ENOENT; 3486 } 3487 3488 /** 3489 * drm_mode_getfb - get FB info 3490 * @dev: drm device for the ioctl 3491 * @data: data pointer for the ioctl 3492 * @file_priv: drm file for the ioctl call 3493 * 3494 * Lookup the FB given its ID and return info about it. 3495 * 3496 * Called by the user via ioctl. 3497 * 3498 * Returns: 3499 * Zero on success, negative errno on failure. 3500 */ 3501 int drm_mode_getfb(struct drm_device *dev, 3502 void *data, struct drm_file *file_priv) 3503 { 3504 struct drm_mode_fb_cmd *r = data; 3505 struct drm_framebuffer *fb; 3506 int ret; 3507 3508 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3509 return -EINVAL; 3510 3511 fb = drm_framebuffer_lookup(dev, r->fb_id); 3512 if (!fb) 3513 return -ENOENT; 3514 3515 r->height = fb->height; 3516 r->width = fb->width; 3517 r->depth = fb->depth; 3518 r->bpp = fb->bits_per_pixel; 3519 r->pitch = fb->pitches[0]; 3520 if (fb->funcs->create_handle) { 3521 if (file_priv->is_master || capable(CAP_SYS_ADMIN) || 3522 drm_is_control_client(file_priv)) { 3523 ret = fb->funcs->create_handle(fb, file_priv, 3524 &r->handle); 3525 } else { 3526 /* GET_FB() is an unprivileged ioctl so we must not 3527 * return a buffer-handle to non-master processes! For 3528 * backwards-compatibility reasons, we cannot make 3529 * GET_FB() privileged, so just return an invalid handle 3530 * for non-masters. */ 3531 r->handle = 0; 3532 ret = 0; 3533 } 3534 } else { 3535 ret = -ENODEV; 3536 } 3537 3538 drm_framebuffer_unreference(fb); 3539 3540 return ret; 3541 } 3542 3543 /** 3544 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3545 * @dev: drm device for the ioctl 3546 * @data: data pointer for the ioctl 3547 * @file_priv: drm file for the ioctl call 3548 * 3549 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3550 * rectangle list. Generic userspace which does frontbuffer rendering must call 3551 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3552 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3553 * 3554 * Modesetting drivers which always update the frontbuffer do not need to 3555 * implement the corresponding ->dirty framebuffer callback. 3556 * 3557 * Called by the user via ioctl. 3558 * 3559 * Returns: 3560 * Zero on success, negative errno on failure. 3561 */ 3562 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3563 void *data, struct drm_file *file_priv) 3564 { 3565 struct drm_clip_rect __user *clips_ptr; 3566 struct drm_clip_rect *clips = NULL; 3567 struct drm_mode_fb_dirty_cmd *r = data; 3568 struct drm_framebuffer *fb; 3569 unsigned flags; 3570 int num_clips; 3571 int ret; 3572 3573 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3574 return -EINVAL; 3575 3576 fb = drm_framebuffer_lookup(dev, r->fb_id); 3577 if (!fb) 3578 return -ENOENT; 3579 3580 num_clips = r->num_clips; 3581 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3582 3583 if (!num_clips != !clips_ptr) { 3584 ret = -EINVAL; 3585 goto out_err1; 3586 } 3587 3588 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3589 3590 /* If userspace annotates copy, clips must come in pairs */ 3591 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3592 ret = -EINVAL; 3593 goto out_err1; 3594 } 3595 3596 if (num_clips && clips_ptr) { 3597 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3598 ret = -EINVAL; 3599 goto out_err1; 3600 } 3601 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); 3602 if (!clips) { 3603 ret = -ENOMEM; 3604 goto out_err1; 3605 } 3606 3607 ret = copy_from_user(clips, clips_ptr, 3608 num_clips * sizeof(*clips)); 3609 if (ret) { 3610 ret = -EFAULT; 3611 goto out_err2; 3612 } 3613 } 3614 3615 if (fb->funcs->dirty) { 3616 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3617 clips, num_clips); 3618 } else { 3619 ret = -ENOSYS; 3620 } 3621 3622 out_err2: 3623 kfree(clips); 3624 out_err1: 3625 drm_framebuffer_unreference(fb); 3626 3627 return ret; 3628 } 3629 3630 3631 /** 3632 * drm_fb_release - remove and free the FBs on this file 3633 * @priv: drm file for the ioctl 3634 * 3635 * Destroy all the FBs associated with @filp. 3636 * 3637 * Called by the user via ioctl. 3638 * 3639 * Returns: 3640 * Zero on success, negative errno on failure. 3641 */ 3642 void drm_fb_release(struct drm_file *priv) 3643 { 3644 struct drm_framebuffer *fb, *tfb; 3645 3646 /* 3647 * When the file gets released that means no one else can access the fb 3648 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3649 * avoid upsetting lockdep since the universal cursor code adds a 3650 * framebuffer while holding mutex locks. 3651 * 3652 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3653 * locks is impossible here since no one else but this function can get 3654 * at it any more. 3655 */ 3656 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3657 list_del_init(&fb->filp_head); 3658 3659 /* This drops the fpriv->fbs reference. */ 3660 drm_framebuffer_unreference(fb); 3661 } 3662 } 3663 3664 /** 3665 * drm_property_create - create a new property type 3666 * @dev: drm device 3667 * @flags: flags specifying the property type 3668 * @name: name of the property 3669 * @num_values: number of pre-defined values 3670 * 3671 * This creates a new generic drm property which can then be attached to a drm 3672 * object with drm_object_attach_property. The returned property object must be 3673 * freed with drm_property_destroy. 3674 * 3675 * Note that the DRM core keeps a per-device list of properties and that, if 3676 * drm_mode_config_cleanup() is called, it will destroy all properties created 3677 * by the driver. 3678 * 3679 * Returns: 3680 * A pointer to the newly created property on success, NULL on failure. 3681 */ 3682 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3683 const char *name, int num_values) 3684 { 3685 struct drm_property *property = NULL; 3686 int ret; 3687 3688 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3689 if (!property) 3690 return NULL; 3691 3692 property->dev = dev; 3693 3694 if (num_values) { 3695 property->values = kcalloc(num_values, sizeof(uint64_t), 3696 GFP_KERNEL); 3697 if (!property->values) 3698 goto fail; 3699 } 3700 3701 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3702 if (ret) 3703 goto fail; 3704 3705 property->flags = flags; 3706 property->num_values = num_values; 3707 INIT_LIST_HEAD(&property->enum_list); 3708 3709 if (name) { 3710 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3711 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3712 } 3713 3714 list_add_tail(&property->head, &dev->mode_config.property_list); 3715 3716 WARN_ON(!drm_property_type_valid(property)); 3717 3718 return property; 3719 fail: 3720 kfree(property->values); 3721 kfree(property); 3722 return NULL; 3723 } 3724 EXPORT_SYMBOL(drm_property_create); 3725 3726 /** 3727 * drm_property_create_enum - create a new enumeration property type 3728 * @dev: drm device 3729 * @flags: flags specifying the property type 3730 * @name: name of the property 3731 * @props: enumeration lists with property values 3732 * @num_values: number of pre-defined values 3733 * 3734 * This creates a new generic drm property which can then be attached to a drm 3735 * object with drm_object_attach_property. The returned property object must be 3736 * freed with drm_property_destroy. 3737 * 3738 * Userspace is only allowed to set one of the predefined values for enumeration 3739 * properties. 3740 * 3741 * Returns: 3742 * A pointer to the newly created property on success, NULL on failure. 3743 */ 3744 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3745 const char *name, 3746 const struct drm_prop_enum_list *props, 3747 int num_values) 3748 { 3749 struct drm_property *property; 3750 int i, ret; 3751 3752 flags |= DRM_MODE_PROP_ENUM; 3753 3754 property = drm_property_create(dev, flags, name, num_values); 3755 if (!property) 3756 return NULL; 3757 3758 for (i = 0; i < num_values; i++) { 3759 ret = drm_property_add_enum(property, i, 3760 props[i].type, 3761 props[i].name); 3762 if (ret) { 3763 drm_property_destroy(dev, property); 3764 return NULL; 3765 } 3766 } 3767 3768 return property; 3769 } 3770 EXPORT_SYMBOL(drm_property_create_enum); 3771 3772 /** 3773 * drm_property_create_bitmask - create a new bitmask property type 3774 * @dev: drm device 3775 * @flags: flags specifying the property type 3776 * @name: name of the property 3777 * @props: enumeration lists with property bitflags 3778 * @num_props: size of the @props array 3779 * @supported_bits: bitmask of all supported enumeration values 3780 * 3781 * This creates a new bitmask drm property which can then be attached to a drm 3782 * object with drm_object_attach_property. The returned property object must be 3783 * freed with drm_property_destroy. 3784 * 3785 * Compared to plain enumeration properties userspace is allowed to set any 3786 * or'ed together combination of the predefined property bitflag values 3787 * 3788 * Returns: 3789 * A pointer to the newly created property on success, NULL on failure. 3790 */ 3791 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3792 int flags, const char *name, 3793 const struct drm_prop_enum_list *props, 3794 int num_props, 3795 uint64_t supported_bits) 3796 { 3797 struct drm_property *property; 3798 int i, ret, index = 0; 3799 int num_values = hweight64(supported_bits); 3800 3801 flags |= DRM_MODE_PROP_BITMASK; 3802 3803 property = drm_property_create(dev, flags, name, num_values); 3804 if (!property) 3805 return NULL; 3806 for (i = 0; i < num_props; i++) { 3807 if (!(supported_bits & (1ULL << props[i].type))) 3808 continue; 3809 3810 if (WARN_ON(index >= num_values)) { 3811 drm_property_destroy(dev, property); 3812 return NULL; 3813 } 3814 3815 ret = drm_property_add_enum(property, index++, 3816 props[i].type, 3817 props[i].name); 3818 if (ret) { 3819 drm_property_destroy(dev, property); 3820 return NULL; 3821 } 3822 } 3823 3824 return property; 3825 } 3826 EXPORT_SYMBOL(drm_property_create_bitmask); 3827 3828 static struct drm_property *property_create_range(struct drm_device *dev, 3829 int flags, const char *name, 3830 uint64_t min, uint64_t max) 3831 { 3832 struct drm_property *property; 3833 3834 property = drm_property_create(dev, flags, name, 2); 3835 if (!property) 3836 return NULL; 3837 3838 property->values[0] = min; 3839 property->values[1] = max; 3840 3841 return property; 3842 } 3843 3844 /** 3845 * drm_property_create_range - create a new unsigned ranged property type 3846 * @dev: drm device 3847 * @flags: flags specifying the property type 3848 * @name: name of the property 3849 * @min: minimum value of the property 3850 * @max: maximum value of the property 3851 * 3852 * This creates a new generic drm property which can then be attached to a drm 3853 * object with drm_object_attach_property. The returned property object must be 3854 * freed with drm_property_destroy. 3855 * 3856 * Userspace is allowed to set any unsigned integer value in the (min, max) 3857 * range inclusive. 3858 * 3859 * Returns: 3860 * A pointer to the newly created property on success, NULL on failure. 3861 */ 3862 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3863 const char *name, 3864 uint64_t min, uint64_t max) 3865 { 3866 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3867 name, min, max); 3868 } 3869 EXPORT_SYMBOL(drm_property_create_range); 3870 3871 /** 3872 * drm_property_create_signed_range - create a new signed ranged property type 3873 * @dev: drm device 3874 * @flags: flags specifying the property type 3875 * @name: name of the property 3876 * @min: minimum value of the property 3877 * @max: maximum value of the property 3878 * 3879 * This creates a new generic drm property which can then be attached to a drm 3880 * object with drm_object_attach_property. The returned property object must be 3881 * freed with drm_property_destroy. 3882 * 3883 * Userspace is allowed to set any signed integer value in the (min, max) 3884 * range inclusive. 3885 * 3886 * Returns: 3887 * A pointer to the newly created property on success, NULL on failure. 3888 */ 3889 struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3890 int flags, const char *name, 3891 int64_t min, int64_t max) 3892 { 3893 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3894 name, I642U64(min), I642U64(max)); 3895 } 3896 EXPORT_SYMBOL(drm_property_create_signed_range); 3897 3898 /** 3899 * drm_property_create_object - create a new object property type 3900 * @dev: drm device 3901 * @flags: flags specifying the property type 3902 * @name: name of the property 3903 * @type: object type from DRM_MODE_OBJECT_* defines 3904 * 3905 * This creates a new generic drm property which can then be attached to a drm 3906 * object with drm_object_attach_property. The returned property object must be 3907 * freed with drm_property_destroy. 3908 * 3909 * Userspace is only allowed to set this to any property value of the given 3910 * @type. Only useful for atomic properties, which is enforced. 3911 * 3912 * Returns: 3913 * A pointer to the newly created property on success, NULL on failure. 3914 */ 3915 struct drm_property *drm_property_create_object(struct drm_device *dev, 3916 int flags, const char *name, uint32_t type) 3917 { 3918 struct drm_property *property; 3919 3920 flags |= DRM_MODE_PROP_OBJECT; 3921 3922 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) 3923 return NULL; 3924 3925 property = drm_property_create(dev, flags, name, 1); 3926 if (!property) 3927 return NULL; 3928 3929 property->values[0] = type; 3930 3931 return property; 3932 } 3933 EXPORT_SYMBOL(drm_property_create_object); 3934 3935 /** 3936 * drm_property_create_bool - create a new boolean property type 3937 * @dev: drm device 3938 * @flags: flags specifying the property type 3939 * @name: name of the property 3940 * 3941 * This creates a new generic drm property which can then be attached to a drm 3942 * object with drm_object_attach_property. The returned property object must be 3943 * freed with drm_property_destroy. 3944 * 3945 * This is implemented as a ranged property with only {0, 1} as valid values. 3946 * 3947 * Returns: 3948 * A pointer to the newly created property on success, NULL on failure. 3949 */ 3950 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, 3951 const char *name) 3952 { 3953 return drm_property_create_range(dev, flags, name, 0, 1); 3954 } 3955 EXPORT_SYMBOL(drm_property_create_bool); 3956 3957 /** 3958 * drm_property_add_enum - add a possible value to an enumeration property 3959 * @property: enumeration property to change 3960 * @index: index of the new enumeration 3961 * @value: value of the new enumeration 3962 * @name: symbolic name of the new enumeration 3963 * 3964 * This functions adds enumerations to a property. 3965 * 3966 * It's use is deprecated, drivers should use one of the more specific helpers 3967 * to directly create the property with all enumerations already attached. 3968 * 3969 * Returns: 3970 * Zero on success, error code on failure. 3971 */ 3972 int drm_property_add_enum(struct drm_property *property, int index, 3973 uint64_t value, const char *name) 3974 { 3975 struct drm_property_enum *prop_enum; 3976 3977 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3978 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3979 return -EINVAL; 3980 3981 /* 3982 * Bitmask enum properties have the additional constraint of values 3983 * from 0 to 63 3984 */ 3985 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3986 (value > 63)) 3987 return -EINVAL; 3988 3989 if (!list_empty(&property->enum_list)) { 3990 list_for_each_entry(prop_enum, &property->enum_list, head) { 3991 if (prop_enum->value == value) { 3992 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3993 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3994 return 0; 3995 } 3996 } 3997 } 3998 3999 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 4000 if (!prop_enum) 4001 return -ENOMEM; 4002 4003 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 4004 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 4005 prop_enum->value = value; 4006 4007 property->values[index] = value; 4008 list_add_tail(&prop_enum->head, &property->enum_list); 4009 return 0; 4010 } 4011 EXPORT_SYMBOL(drm_property_add_enum); 4012 4013 /** 4014 * drm_property_destroy - destroy a drm property 4015 * @dev: drm device 4016 * @property: property to destry 4017 * 4018 * This function frees a property including any attached resources like 4019 * enumeration values. 4020 */ 4021 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 4022 { 4023 struct drm_property_enum *prop_enum, *pt; 4024 4025 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 4026 list_del(&prop_enum->head); 4027 kfree(prop_enum); 4028 } 4029 4030 if (property->num_values) 4031 kfree(property->values); 4032 drm_mode_object_put(dev, &property->base); 4033 list_del(&property->head); 4034 kfree(property); 4035 } 4036 EXPORT_SYMBOL(drm_property_destroy); 4037 4038 /** 4039 * drm_object_attach_property - attach a property to a modeset object 4040 * @obj: drm modeset object 4041 * @property: property to attach 4042 * @init_val: initial value of the property 4043 * 4044 * This attaches the given property to the modeset object with the given initial 4045 * value. Currently this function cannot fail since the properties are stored in 4046 * a statically sized array. 4047 */ 4048 void drm_object_attach_property(struct drm_mode_object *obj, 4049 struct drm_property *property, 4050 uint64_t init_val) 4051 { 4052 int count = obj->properties->count; 4053 4054 if (count == DRM_OBJECT_MAX_PROPERTY) { 4055 WARN(1, "Failed to attach object property (type: 0x%x). Please " 4056 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 4057 "you see this message on the same object type.\n", 4058 obj->type); 4059 return; 4060 } 4061 4062 obj->properties->properties[count] = property; 4063 obj->properties->values[count] = init_val; 4064 obj->properties->count++; 4065 if (property->flags & DRM_MODE_PROP_ATOMIC) 4066 obj->properties->atomic_count++; 4067 } 4068 EXPORT_SYMBOL(drm_object_attach_property); 4069 4070 /** 4071 * drm_object_property_set_value - set the value of a property 4072 * @obj: drm mode object to set property value for 4073 * @property: property to set 4074 * @val: value the property should be set to 4075 * 4076 * This functions sets a given property on a given object. This function only 4077 * changes the software state of the property, it does not call into the 4078 * driver's ->set_property callback. 4079 * 4080 * Returns: 4081 * Zero on success, error code on failure. 4082 */ 4083 int drm_object_property_set_value(struct drm_mode_object *obj, 4084 struct drm_property *property, uint64_t val) 4085 { 4086 int i; 4087 4088 for (i = 0; i < obj->properties->count; i++) { 4089 if (obj->properties->properties[i] == property) { 4090 obj->properties->values[i] = val; 4091 return 0; 4092 } 4093 } 4094 4095 return -EINVAL; 4096 } 4097 EXPORT_SYMBOL(drm_object_property_set_value); 4098 4099 /** 4100 * drm_object_property_get_value - retrieve the value of a property 4101 * @obj: drm mode object to get property value from 4102 * @property: property to retrieve 4103 * @val: storage for the property value 4104 * 4105 * This function retrieves the softare state of the given property for the given 4106 * property. Since there is no driver callback to retrieve the current property 4107 * value this might be out of sync with the hardware, depending upon the driver 4108 * and property. 4109 * 4110 * Returns: 4111 * Zero on success, error code on failure. 4112 */ 4113 int drm_object_property_get_value(struct drm_mode_object *obj, 4114 struct drm_property *property, uint64_t *val) 4115 { 4116 int i; 4117 4118 /* read-only properties bypass atomic mechanism and still store 4119 * their value in obj->properties->values[].. mostly to avoid 4120 * having to deal w/ EDID and similar props in atomic paths: 4121 */ 4122 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && 4123 !(property->flags & DRM_MODE_PROP_IMMUTABLE)) 4124 return drm_atomic_get_property(obj, property, val); 4125 4126 for (i = 0; i < obj->properties->count; i++) { 4127 if (obj->properties->properties[i] == property) { 4128 *val = obj->properties->values[i]; 4129 return 0; 4130 } 4131 } 4132 4133 return -EINVAL; 4134 } 4135 EXPORT_SYMBOL(drm_object_property_get_value); 4136 4137 /** 4138 * drm_mode_getproperty_ioctl - get the property metadata 4139 * @dev: DRM device 4140 * @data: ioctl data 4141 * @file_priv: DRM file info 4142 * 4143 * This function retrieves the metadata for a given property, like the different 4144 * possible values for an enum property or the limits for a range property. 4145 * 4146 * Blob properties are special 4147 * 4148 * Called by the user via ioctl. 4149 * 4150 * Returns: 4151 * Zero on success, negative errno on failure. 4152 */ 4153 int drm_mode_getproperty_ioctl(struct drm_device *dev, 4154 void *data, struct drm_file *file_priv) 4155 { 4156 struct drm_mode_get_property *out_resp = data; 4157 struct drm_property *property; 4158 int enum_count = 0; 4159 int value_count = 0; 4160 int ret = 0, i; 4161 int copied; 4162 struct drm_property_enum *prop_enum; 4163 struct drm_mode_property_enum __user *enum_ptr; 4164 uint64_t __user *values_ptr; 4165 4166 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4167 return -EINVAL; 4168 4169 drm_modeset_lock_all(dev); 4170 property = drm_property_find(dev, out_resp->prop_id); 4171 if (!property) { 4172 ret = -ENOENT; 4173 goto done; 4174 } 4175 4176 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4177 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4178 list_for_each_entry(prop_enum, &property->enum_list, head) 4179 enum_count++; 4180 } 4181 4182 value_count = property->num_values; 4183 4184 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 4185 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 4186 out_resp->flags = property->flags; 4187 4188 if ((out_resp->count_values >= value_count) && value_count) { 4189 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 4190 for (i = 0; i < value_count; i++) { 4191 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 4192 ret = -EFAULT; 4193 goto done; 4194 } 4195 } 4196 } 4197 out_resp->count_values = value_count; 4198 4199 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4200 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4201 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 4202 copied = 0; 4203 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 4204 list_for_each_entry(prop_enum, &property->enum_list, head) { 4205 4206 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 4207 ret = -EFAULT; 4208 goto done; 4209 } 4210 4211 if (copy_to_user(&enum_ptr[copied].name, 4212 &prop_enum->name, DRM_PROP_NAME_LEN)) { 4213 ret = -EFAULT; 4214 goto done; 4215 } 4216 copied++; 4217 } 4218 } 4219 out_resp->count_enum_blobs = enum_count; 4220 } 4221 4222 /* 4223 * NOTE: The idea seems to have been to use this to read all the blob 4224 * property values. But nothing ever added them to the corresponding 4225 * list, userspace always used the special-purpose get_blob ioctl to 4226 * read the value for a blob property. It also doesn't make a lot of 4227 * sense to return values here when everything else is just metadata for 4228 * the property itself. 4229 */ 4230 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4231 out_resp->count_enum_blobs = 0; 4232 done: 4233 drm_modeset_unlock_all(dev); 4234 return ret; 4235 } 4236 4237 /** 4238 * drm_property_create_blob - Create new blob property 4239 * 4240 * Creates a new blob property for a specified DRM device, optionally 4241 * copying data. 4242 * 4243 * @dev: DRM device to create property for 4244 * @length: Length to allocate for blob data 4245 * @data: If specified, copies data into blob 4246 * 4247 * Returns: 4248 * New blob property with a single reference on success, or an ERR_PTR 4249 * value on failure. 4250 */ 4251 struct drm_property_blob * 4252 drm_property_create_blob(struct drm_device *dev, size_t length, 4253 const void *data) 4254 { 4255 struct drm_property_blob *blob; 4256 int ret; 4257 4258 if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob)) 4259 return ERR_PTR(-EINVAL); 4260 4261 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4262 if (!blob) 4263 return ERR_PTR(-ENOMEM); 4264 4265 /* This must be explicitly initialised, so we can safely call list_del 4266 * on it in the removal handler, even if it isn't in a file list. */ 4267 INIT_LIST_HEAD(&blob->head_file); 4268 blob->length = length; 4269 blob->dev = dev; 4270 4271 if (data) 4272 memcpy(blob->data, data, length); 4273 4274 mutex_lock(&dev->mode_config.blob_lock); 4275 4276 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 4277 if (ret) { 4278 kfree(blob); 4279 mutex_unlock(&dev->mode_config.blob_lock); 4280 return ERR_PTR(-EINVAL); 4281 } 4282 4283 kref_init(&blob->refcount); 4284 4285 list_add_tail(&blob->head_global, 4286 &dev->mode_config.property_blob_list); 4287 4288 mutex_unlock(&dev->mode_config.blob_lock); 4289 4290 return blob; 4291 } 4292 EXPORT_SYMBOL(drm_property_create_blob); 4293 4294 /** 4295 * drm_property_free_blob - Blob property destructor 4296 * 4297 * Internal free function for blob properties; must not be used directly. 4298 * 4299 * @kref: Reference 4300 */ 4301 static void drm_property_free_blob(struct kref *kref) 4302 { 4303 struct drm_property_blob *blob = 4304 container_of(kref, struct drm_property_blob, refcount); 4305 4306 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock)); 4307 4308 list_del(&blob->head_global); 4309 list_del(&blob->head_file); 4310 drm_mode_object_put(blob->dev, &blob->base); 4311 4312 kfree(blob); 4313 } 4314 4315 /** 4316 * drm_property_unreference_blob - Unreference a blob property 4317 * 4318 * Drop a reference on a blob property. May free the object. 4319 * 4320 * @blob: Pointer to blob property 4321 */ 4322 void drm_property_unreference_blob(struct drm_property_blob *blob) 4323 { 4324 struct drm_device *dev; 4325 4326 if (!blob) 4327 return; 4328 4329 dev = blob->dev; 4330 4331 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4332 4333 if (kref_put_mutex(&blob->refcount, drm_property_free_blob, 4334 &dev->mode_config.blob_lock)) 4335 mutex_unlock(&dev->mode_config.blob_lock); 4336 else 4337 might_lock(&dev->mode_config.blob_lock); 4338 } 4339 EXPORT_SYMBOL(drm_property_unreference_blob); 4340 4341 /** 4342 * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held 4343 * 4344 * Drop a reference on a blob property. May free the object. This must be 4345 * called with blob_lock held. 4346 * 4347 * @blob: Pointer to blob property 4348 */ 4349 static void drm_property_unreference_blob_locked(struct drm_property_blob *blob) 4350 { 4351 if (!blob) 4352 return; 4353 4354 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4355 4356 kref_put(&blob->refcount, drm_property_free_blob); 4357 } 4358 4359 /** 4360 * drm_property_destroy_user_blobs - destroy all blobs created by this client 4361 * @dev: DRM device 4362 * @file_priv: destroy all blobs owned by this file handle 4363 */ 4364 void drm_property_destroy_user_blobs(struct drm_device *dev, 4365 struct drm_file *file_priv) 4366 { 4367 struct drm_property_blob *blob, *bt; 4368 4369 mutex_lock(&dev->mode_config.blob_lock); 4370 4371 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) { 4372 list_del_init(&blob->head_file); 4373 drm_property_unreference_blob_locked(blob); 4374 } 4375 4376 mutex_unlock(&dev->mode_config.blob_lock); 4377 } 4378 4379 /** 4380 * drm_property_reference_blob - Take a reference on an existing property 4381 * 4382 * Take a new reference on an existing blob property. 4383 * 4384 * @blob: Pointer to blob property 4385 */ 4386 struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob) 4387 { 4388 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4389 kref_get(&blob->refcount); 4390 return blob; 4391 } 4392 EXPORT_SYMBOL(drm_property_reference_blob); 4393 4394 /* 4395 * Like drm_property_lookup_blob, but does not return an additional reference. 4396 * Must be called with blob_lock held. 4397 */ 4398 static struct drm_property_blob *__drm_property_lookup_blob(struct drm_device *dev, 4399 uint32_t id) 4400 { 4401 struct drm_mode_object *obj = NULL; 4402 struct drm_property_blob *blob; 4403 4404 WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock)); 4405 4406 mutex_lock(&dev->mode_config.idr_mutex); 4407 obj = idr_find(&dev->mode_config.crtc_idr, id); 4408 if (!obj || (obj->type != DRM_MODE_OBJECT_BLOB) || (obj->id != id)) 4409 blob = NULL; 4410 else 4411 blob = obj_to_blob(obj); 4412 mutex_unlock(&dev->mode_config.idr_mutex); 4413 4414 return blob; 4415 } 4416 4417 /** 4418 * drm_property_lookup_blob - look up a blob property and take a reference 4419 * @dev: drm device 4420 * @id: id of the blob property 4421 * 4422 * If successful, this takes an additional reference to the blob property. 4423 * callers need to make sure to eventually unreference the returned property 4424 * again, using @drm_property_unreference_blob. 4425 */ 4426 struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev, 4427 uint32_t id) 4428 { 4429 struct drm_property_blob *blob; 4430 4431 mutex_lock(&dev->mode_config.blob_lock); 4432 blob = __drm_property_lookup_blob(dev, id); 4433 if (blob) { 4434 if (!kref_get_unless_zero(&blob->refcount)) 4435 blob = NULL; 4436 } 4437 mutex_unlock(&dev->mode_config.blob_lock); 4438 4439 return blob; 4440 } 4441 EXPORT_SYMBOL(drm_property_lookup_blob); 4442 4443 /** 4444 * drm_property_replace_global_blob - atomically replace existing blob property 4445 * @dev: drm device 4446 * @replace: location of blob property pointer to be replaced 4447 * @length: length of data for new blob, or 0 for no data 4448 * @data: content for new blob, or NULL for no data 4449 * @obj_holds_id: optional object for property holding blob ID 4450 * @prop_holds_id: optional property holding blob ID 4451 * @return 0 on success or error on failure 4452 * 4453 * This function will atomically replace a global property in the blob list, 4454 * optionally updating a property which holds the ID of that property. It is 4455 * guaranteed to be atomic: no caller will be allowed to see intermediate 4456 * results, and either the entire operation will succeed and clean up the 4457 * previous property, or it will fail and the state will be unchanged. 4458 * 4459 * If length is 0 or data is NULL, no new blob will be created, and the holding 4460 * property, if specified, will be set to 0. 4461 * 4462 * Access to the replace pointer is assumed to be protected by the caller, e.g. 4463 * by holding the relevant modesetting object lock for its parent. 4464 * 4465 * For example, a drm_connector has a 'PATH' property, which contains the ID 4466 * of a blob property with the value of the MST path information. Calling this 4467 * function with replace pointing to the connector's path_blob_ptr, length and 4468 * data set for the new path information, obj_holds_id set to the connector's 4469 * base object, and prop_holds_id set to the path property name, will perform 4470 * a completely atomic update. The access to path_blob_ptr is protected by the 4471 * caller holding a lock on the connector. 4472 */ 4473 static int drm_property_replace_global_blob(struct drm_device *dev, 4474 struct drm_property_blob **replace, 4475 size_t length, 4476 const void *data, 4477 struct drm_mode_object *obj_holds_id, 4478 struct drm_property *prop_holds_id) 4479 { 4480 struct drm_property_blob *new_blob = NULL; 4481 struct drm_property_blob *old_blob = NULL; 4482 int ret; 4483 4484 WARN_ON(replace == NULL); 4485 4486 old_blob = *replace; 4487 4488 if (length && data) { 4489 new_blob = drm_property_create_blob(dev, length, data); 4490 if (IS_ERR(new_blob)) 4491 return PTR_ERR(new_blob); 4492 } 4493 4494 /* This does not need to be synchronised with blob_lock, as the 4495 * get_properties ioctl locks all modesetting objects, and 4496 * obj_holds_id must be locked before calling here, so we cannot 4497 * have its value out of sync with the list membership modified 4498 * below under blob_lock. */ 4499 if (obj_holds_id) { 4500 ret = drm_object_property_set_value(obj_holds_id, 4501 prop_holds_id, 4502 new_blob ? 4503 new_blob->base.id : 0); 4504 if (ret != 0) 4505 goto err_created; 4506 } 4507 4508 drm_property_unreference_blob(old_blob); 4509 *replace = new_blob; 4510 4511 return 0; 4512 4513 err_created: 4514 drm_property_unreference_blob(new_blob); 4515 return ret; 4516 } 4517 4518 /** 4519 * drm_mode_getblob_ioctl - get the contents of a blob property value 4520 * @dev: DRM device 4521 * @data: ioctl data 4522 * @file_priv: DRM file info 4523 * 4524 * This function retrieves the contents of a blob property. The value stored in 4525 * an object's blob property is just a normal modeset object id. 4526 * 4527 * Called by the user via ioctl. 4528 * 4529 * Returns: 4530 * Zero on success, negative errno on failure. 4531 */ 4532 int drm_mode_getblob_ioctl(struct drm_device *dev, 4533 void *data, struct drm_file *file_priv) 4534 { 4535 struct drm_mode_get_blob *out_resp = data; 4536 struct drm_property_blob *blob; 4537 int ret = 0; 4538 void __user *blob_ptr; 4539 4540 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4541 return -EINVAL; 4542 4543 drm_modeset_lock_all(dev); 4544 mutex_lock(&dev->mode_config.blob_lock); 4545 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4546 if (!blob) { 4547 ret = -ENOENT; 4548 goto done; 4549 } 4550 4551 if (out_resp->length == blob->length) { 4552 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4553 if (copy_to_user(blob_ptr, blob->data, blob->length)) { 4554 ret = -EFAULT; 4555 goto done; 4556 } 4557 } 4558 out_resp->length = blob->length; 4559 4560 done: 4561 mutex_unlock(&dev->mode_config.blob_lock); 4562 drm_modeset_unlock_all(dev); 4563 return ret; 4564 } 4565 4566 /** 4567 * drm_mode_createblob_ioctl - create a new blob property 4568 * @dev: DRM device 4569 * @data: ioctl data 4570 * @file_priv: DRM file info 4571 * 4572 * This function creates a new blob property with user-defined values. In order 4573 * to give us sensible validation and checking when creating, rather than at 4574 * every potential use, we also require a type to be provided upfront. 4575 * 4576 * Called by the user via ioctl. 4577 * 4578 * Returns: 4579 * Zero on success, negative errno on failure. 4580 */ 4581 int drm_mode_createblob_ioctl(struct drm_device *dev, 4582 void *data, struct drm_file *file_priv) 4583 { 4584 struct drm_mode_create_blob *out_resp = data; 4585 struct drm_property_blob *blob; 4586 void __user *blob_ptr; 4587 int ret = 0; 4588 4589 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4590 return -EINVAL; 4591 4592 blob = drm_property_create_blob(dev, out_resp->length, NULL); 4593 if (IS_ERR(blob)) 4594 return PTR_ERR(blob); 4595 4596 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4597 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) { 4598 ret = -EFAULT; 4599 goto out_blob; 4600 } 4601 4602 /* Dropping the lock between create_blob and our access here is safe 4603 * as only the same file_priv can remove the blob; at this point, it is 4604 * not associated with any file_priv. */ 4605 mutex_lock(&dev->mode_config.blob_lock); 4606 out_resp->blob_id = blob->base.id; 4607 list_add_tail(&blob->head_file, &file_priv->blobs); 4608 mutex_unlock(&dev->mode_config.blob_lock); 4609 4610 return 0; 4611 4612 out_blob: 4613 drm_property_unreference_blob(blob); 4614 return ret; 4615 } 4616 4617 /** 4618 * drm_mode_destroyblob_ioctl - destroy a user blob property 4619 * @dev: DRM device 4620 * @data: ioctl data 4621 * @file_priv: DRM file info 4622 * 4623 * Destroy an existing user-defined blob property. 4624 * 4625 * Called by the user via ioctl. 4626 * 4627 * Returns: 4628 * Zero on success, negative errno on failure. 4629 */ 4630 int drm_mode_destroyblob_ioctl(struct drm_device *dev, 4631 void *data, struct drm_file *file_priv) 4632 { 4633 struct drm_mode_destroy_blob *out_resp = data; 4634 struct drm_property_blob *blob = NULL, *bt; 4635 bool found = false; 4636 int ret = 0; 4637 4638 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4639 return -EINVAL; 4640 4641 mutex_lock(&dev->mode_config.blob_lock); 4642 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4643 if (!blob) { 4644 ret = -ENOENT; 4645 goto err; 4646 } 4647 4648 /* Ensure the property was actually created by this user. */ 4649 list_for_each_entry(bt, &file_priv->blobs, head_file) { 4650 if (bt == blob) { 4651 found = true; 4652 break; 4653 } 4654 } 4655 4656 if (!found) { 4657 ret = -EPERM; 4658 goto err; 4659 } 4660 4661 /* We must drop head_file here, because we may not be the last 4662 * reference on the blob. */ 4663 list_del_init(&blob->head_file); 4664 drm_property_unreference_blob_locked(blob); 4665 mutex_unlock(&dev->mode_config.blob_lock); 4666 4667 return 0; 4668 4669 err: 4670 mutex_unlock(&dev->mode_config.blob_lock); 4671 return ret; 4672 } 4673 4674 /** 4675 * drm_mode_connector_set_path_property - set tile property on connector 4676 * @connector: connector to set property on. 4677 * @path: path to use for property; must not be NULL. 4678 * 4679 * This creates a property to expose to userspace to specify a 4680 * connector path. This is mainly used for DisplayPort MST where 4681 * connectors have a topology and we want to allow userspace to give 4682 * them more meaningful names. 4683 * 4684 * Returns: 4685 * Zero on success, negative errno on failure. 4686 */ 4687 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4688 const char *path) 4689 { 4690 struct drm_device *dev = connector->dev; 4691 int ret; 4692 4693 ret = drm_property_replace_global_blob(dev, 4694 &connector->path_blob_ptr, 4695 strlen(path) + 1, 4696 path, 4697 &connector->base, 4698 dev->mode_config.path_property); 4699 return ret; 4700 } 4701 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4702 4703 /** 4704 * drm_mode_connector_set_tile_property - set tile property on connector 4705 * @connector: connector to set property on. 4706 * 4707 * This looks up the tile information for a connector, and creates a 4708 * property for userspace to parse if it exists. The property is of 4709 * the form of 8 integers using ':' as a separator. 4710 * 4711 * Returns: 4712 * Zero on success, errno on failure. 4713 */ 4714 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4715 { 4716 struct drm_device *dev = connector->dev; 4717 char tile[256]; 4718 int ret; 4719 4720 if (!connector->has_tile) { 4721 ret = drm_property_replace_global_blob(dev, 4722 &connector->tile_blob_ptr, 4723 0, 4724 NULL, 4725 &connector->base, 4726 dev->mode_config.tile_property); 4727 return ret; 4728 } 4729 4730 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4731 connector->tile_group->id, connector->tile_is_single_monitor, 4732 connector->num_h_tile, connector->num_v_tile, 4733 connector->tile_h_loc, connector->tile_v_loc, 4734 connector->tile_h_size, connector->tile_v_size); 4735 4736 ret = drm_property_replace_global_blob(dev, 4737 &connector->tile_blob_ptr, 4738 strlen(tile) + 1, 4739 tile, 4740 &connector->base, 4741 dev->mode_config.tile_property); 4742 return ret; 4743 } 4744 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4745 4746 /** 4747 * drm_mode_connector_update_edid_property - update the edid property of a connector 4748 * @connector: drm connector 4749 * @edid: new value of the edid property 4750 * 4751 * This function creates a new blob modeset object and assigns its id to the 4752 * connector's edid property. 4753 * 4754 * Returns: 4755 * Zero on success, negative errno on failure. 4756 */ 4757 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4758 const struct edid *edid) 4759 { 4760 struct drm_device *dev = connector->dev; 4761 size_t size = 0; 4762 int ret; 4763 4764 /* ignore requests to set edid when overridden */ 4765 if (connector->override_edid) 4766 return 0; 4767 4768 if (edid) 4769 size = EDID_LENGTH * (1 + edid->extensions); 4770 4771 ret = drm_property_replace_global_blob(dev, 4772 &connector->edid_blob_ptr, 4773 size, 4774 edid, 4775 &connector->base, 4776 dev->mode_config.edid_property); 4777 return ret; 4778 } 4779 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4780 4781 /* Some properties could refer to dynamic refcnt'd objects, or things that 4782 * need special locking to handle lifetime issues (ie. to ensure the prop 4783 * value doesn't become invalid part way through the property update due to 4784 * race). The value returned by reference via 'obj' should be passed back 4785 * to drm_property_change_valid_put() after the property is set (and the 4786 * object to which the property is attached has a chance to take it's own 4787 * reference). 4788 */ 4789 bool drm_property_change_valid_get(struct drm_property *property, 4790 uint64_t value, struct drm_mode_object **ref) 4791 { 4792 int i; 4793 4794 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4795 return false; 4796 4797 *ref = NULL; 4798 4799 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4800 if (value < property->values[0] || value > property->values[1]) 4801 return false; 4802 return true; 4803 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4804 int64_t svalue = U642I64(value); 4805 4806 if (svalue < U642I64(property->values[0]) || 4807 svalue > U642I64(property->values[1])) 4808 return false; 4809 return true; 4810 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4811 uint64_t valid_mask = 0; 4812 4813 for (i = 0; i < property->num_values; i++) 4814 valid_mask |= (1ULL << property->values[i]); 4815 return !(value & ~valid_mask); 4816 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4817 struct drm_property_blob *blob; 4818 4819 if (value == 0) 4820 return true; 4821 4822 blob = drm_property_lookup_blob(property->dev, value); 4823 if (blob) { 4824 *ref = &blob->base; 4825 return true; 4826 } else { 4827 return false; 4828 } 4829 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4830 /* a zero value for an object property translates to null: */ 4831 if (value == 0) 4832 return true; 4833 4834 /* handle refcnt'd objects specially: */ 4835 if (property->values[0] == DRM_MODE_OBJECT_FB) { 4836 struct drm_framebuffer *fb; 4837 fb = drm_framebuffer_lookup(property->dev, value); 4838 if (fb) { 4839 *ref = &fb->base; 4840 return true; 4841 } else { 4842 return false; 4843 } 4844 } else { 4845 return _object_find(property->dev, value, property->values[0]) != NULL; 4846 } 4847 } 4848 4849 for (i = 0; i < property->num_values; i++) 4850 if (property->values[i] == value) 4851 return true; 4852 return false; 4853 } 4854 4855 void drm_property_change_valid_put(struct drm_property *property, 4856 struct drm_mode_object *ref) 4857 { 4858 if (!ref) 4859 return; 4860 4861 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4862 if (property->values[0] == DRM_MODE_OBJECT_FB) 4863 drm_framebuffer_unreference(obj_to_fb(ref)); 4864 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4865 drm_property_unreference_blob(obj_to_blob(ref)); 4866 } 4867 4868 /** 4869 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4870 * @dev: DRM device 4871 * @data: ioctl data 4872 * @file_priv: DRM file info 4873 * 4874 * This function sets the current value for a connectors's property. It also 4875 * calls into a driver's ->set_property callback to update the hardware state 4876 * 4877 * Called by the user via ioctl. 4878 * 4879 * Returns: 4880 * Zero on success, negative errno on failure. 4881 */ 4882 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4883 void *data, struct drm_file *file_priv) 4884 { 4885 struct drm_mode_connector_set_property *conn_set_prop = data; 4886 struct drm_mode_obj_set_property obj_set_prop = { 4887 .value = conn_set_prop->value, 4888 .prop_id = conn_set_prop->prop_id, 4889 .obj_id = conn_set_prop->connector_id, 4890 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4891 }; 4892 4893 /* It does all the locking and checking we need */ 4894 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4895 } 4896 4897 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4898 struct drm_property *property, 4899 uint64_t value) 4900 { 4901 int ret = -EINVAL; 4902 struct drm_connector *connector = obj_to_connector(obj); 4903 4904 /* Do DPMS ourselves */ 4905 if (property == connector->dev->mode_config.dpms_property) { 4906 ret = (*connector->funcs->dpms)(connector, (int)value); 4907 } else if (connector->funcs->set_property) 4908 ret = connector->funcs->set_property(connector, property, value); 4909 4910 /* store the property value if successful */ 4911 if (!ret) 4912 drm_object_property_set_value(&connector->base, property, value); 4913 return ret; 4914 } 4915 4916 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4917 struct drm_property *property, 4918 uint64_t value) 4919 { 4920 int ret = -EINVAL; 4921 struct drm_crtc *crtc = obj_to_crtc(obj); 4922 4923 if (crtc->funcs->set_property) 4924 ret = crtc->funcs->set_property(crtc, property, value); 4925 if (!ret) 4926 drm_object_property_set_value(obj, property, value); 4927 4928 return ret; 4929 } 4930 4931 /** 4932 * drm_mode_plane_set_obj_prop - set the value of a property 4933 * @plane: drm plane object to set property value for 4934 * @property: property to set 4935 * @value: value the property should be set to 4936 * 4937 * This functions sets a given property on a given plane object. This function 4938 * calls the driver's ->set_property callback and changes the software state of 4939 * the property if the callback succeeds. 4940 * 4941 * Returns: 4942 * Zero on success, error code on failure. 4943 */ 4944 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4945 struct drm_property *property, 4946 uint64_t value) 4947 { 4948 int ret = -EINVAL; 4949 struct drm_mode_object *obj = &plane->base; 4950 4951 if (plane->funcs->set_property) 4952 ret = plane->funcs->set_property(plane, property, value); 4953 if (!ret) 4954 drm_object_property_set_value(obj, property, value); 4955 4956 return ret; 4957 } 4958 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4959 4960 /** 4961 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 4962 * @dev: DRM device 4963 * @data: ioctl data 4964 * @file_priv: DRM file info 4965 * 4966 * This function retrieves the current value for an object's property. Compared 4967 * to the connector specific ioctl this one is extended to also work on crtc and 4968 * plane objects. 4969 * 4970 * Called by the user via ioctl. 4971 * 4972 * Returns: 4973 * Zero on success, negative errno on failure. 4974 */ 4975 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4976 struct drm_file *file_priv) 4977 { 4978 struct drm_mode_obj_get_properties *arg = data; 4979 struct drm_mode_object *obj; 4980 int ret = 0; 4981 4982 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4983 return -EINVAL; 4984 4985 drm_modeset_lock_all(dev); 4986 4987 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4988 if (!obj) { 4989 ret = -ENOENT; 4990 goto out; 4991 } 4992 if (!obj->properties) { 4993 ret = -EINVAL; 4994 goto out; 4995 } 4996 4997 ret = get_properties(obj, file_priv->atomic, 4998 (uint32_t __user *)(unsigned long)(arg->props_ptr), 4999 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), 5000 &arg->count_props); 5001 5002 out: 5003 drm_modeset_unlock_all(dev); 5004 return ret; 5005 } 5006 5007 /** 5008 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 5009 * @dev: DRM device 5010 * @data: ioctl data 5011 * @file_priv: DRM file info 5012 * 5013 * This function sets the current value for an object's property. It also calls 5014 * into a driver's ->set_property callback to update the hardware state. 5015 * Compared to the connector specific ioctl this one is extended to also work on 5016 * crtc and plane objects. 5017 * 5018 * Called by the user via ioctl. 5019 * 5020 * Returns: 5021 * Zero on success, negative errno on failure. 5022 */ 5023 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 5024 struct drm_file *file_priv) 5025 { 5026 struct drm_mode_obj_set_property *arg = data; 5027 struct drm_mode_object *arg_obj; 5028 struct drm_mode_object *prop_obj; 5029 struct drm_property *property; 5030 int i, ret = -EINVAL; 5031 struct drm_mode_object *ref; 5032 5033 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5034 return -EINVAL; 5035 5036 drm_modeset_lock_all(dev); 5037 5038 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 5039 if (!arg_obj) { 5040 ret = -ENOENT; 5041 goto out; 5042 } 5043 if (!arg_obj->properties) 5044 goto out; 5045 5046 for (i = 0; i < arg_obj->properties->count; i++) 5047 if (arg_obj->properties->properties[i]->base.id == arg->prop_id) 5048 break; 5049 5050 if (i == arg_obj->properties->count) 5051 goto out; 5052 5053 prop_obj = drm_mode_object_find(dev, arg->prop_id, 5054 DRM_MODE_OBJECT_PROPERTY); 5055 if (!prop_obj) { 5056 ret = -ENOENT; 5057 goto out; 5058 } 5059 property = obj_to_property(prop_obj); 5060 5061 if (!drm_property_change_valid_get(property, arg->value, &ref)) 5062 goto out; 5063 5064 switch (arg_obj->type) { 5065 case DRM_MODE_OBJECT_CONNECTOR: 5066 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 5067 arg->value); 5068 break; 5069 case DRM_MODE_OBJECT_CRTC: 5070 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 5071 break; 5072 case DRM_MODE_OBJECT_PLANE: 5073 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 5074 property, arg->value); 5075 break; 5076 } 5077 5078 drm_property_change_valid_put(property, ref); 5079 5080 out: 5081 drm_modeset_unlock_all(dev); 5082 return ret; 5083 } 5084 5085 /** 5086 * drm_mode_connector_attach_encoder - attach a connector to an encoder 5087 * @connector: connector to attach 5088 * @encoder: encoder to attach @connector to 5089 * 5090 * This function links up a connector to an encoder. Note that the routing 5091 * restrictions between encoders and crtcs are exposed to userspace through the 5092 * possible_clones and possible_crtcs bitmasks. 5093 * 5094 * Returns: 5095 * Zero on success, negative errno on failure. 5096 */ 5097 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 5098 struct drm_encoder *encoder) 5099 { 5100 int i; 5101 5102 /* 5103 * In the past, drivers have attempted to model the static association 5104 * of connector to encoder in simple connector/encoder devices using a 5105 * direct assignment of connector->encoder = encoder. This connection 5106 * is a logical one and the responsibility of the core, so drivers are 5107 * expected not to mess with this. 5108 * 5109 * Note that the error return should've been enough here, but a large 5110 * majority of drivers ignores the return value, so add in a big WARN 5111 * to get people's attention. 5112 */ 5113 if (WARN_ON(connector->encoder)) 5114 return -EINVAL; 5115 5116 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 5117 if (connector->encoder_ids[i] == 0) { 5118 connector->encoder_ids[i] = encoder->base.id; 5119 return 0; 5120 } 5121 } 5122 return -ENOMEM; 5123 } 5124 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 5125 5126 /** 5127 * drm_mode_crtc_set_gamma_size - set the gamma table size 5128 * @crtc: CRTC to set the gamma table size for 5129 * @gamma_size: size of the gamma table 5130 * 5131 * Drivers which support gamma tables should set this to the supported gamma 5132 * table size when initializing the CRTC. Currently the drm core only supports a 5133 * fixed gamma table size. 5134 * 5135 * Returns: 5136 * Zero on success, negative errno on failure. 5137 */ 5138 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 5139 int gamma_size) 5140 { 5141 crtc->gamma_size = gamma_size; 5142 5143 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, 5144 GFP_KERNEL); 5145 if (!crtc->gamma_store) { 5146 crtc->gamma_size = 0; 5147 return -ENOMEM; 5148 } 5149 5150 return 0; 5151 } 5152 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 5153 5154 /** 5155 * drm_mode_gamma_set_ioctl - set the gamma table 5156 * @dev: DRM device 5157 * @data: ioctl data 5158 * @file_priv: DRM file info 5159 * 5160 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 5161 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 5162 * 5163 * Called by the user via ioctl. 5164 * 5165 * Returns: 5166 * Zero on success, negative errno on failure. 5167 */ 5168 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 5169 void *data, struct drm_file *file_priv) 5170 { 5171 struct drm_mode_crtc_lut *crtc_lut = data; 5172 struct drm_crtc *crtc; 5173 void *r_base, *g_base, *b_base; 5174 int size; 5175 int ret = 0; 5176 5177 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5178 return -EINVAL; 5179 5180 drm_modeset_lock_all(dev); 5181 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5182 if (!crtc) { 5183 ret = -ENOENT; 5184 goto out; 5185 } 5186 5187 if (crtc->funcs->gamma_set == NULL) { 5188 ret = -ENOSYS; 5189 goto out; 5190 } 5191 5192 /* memcpy into gamma store */ 5193 if (crtc_lut->gamma_size != crtc->gamma_size) { 5194 ret = -EINVAL; 5195 goto out; 5196 } 5197 5198 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5199 r_base = crtc->gamma_store; 5200 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 5201 ret = -EFAULT; 5202 goto out; 5203 } 5204 5205 g_base = r_base + size; 5206 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 5207 ret = -EFAULT; 5208 goto out; 5209 } 5210 5211 b_base = g_base + size; 5212 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 5213 ret = -EFAULT; 5214 goto out; 5215 } 5216 5217 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 5218 5219 out: 5220 drm_modeset_unlock_all(dev); 5221 return ret; 5222 5223 } 5224 5225 /** 5226 * drm_mode_gamma_get_ioctl - get the gamma table 5227 * @dev: DRM device 5228 * @data: ioctl data 5229 * @file_priv: DRM file info 5230 * 5231 * Copy the current gamma table into the storage provided. This also provides 5232 * the gamma table size the driver expects, which can be used to size the 5233 * allocated storage. 5234 * 5235 * Called by the user via ioctl. 5236 * 5237 * Returns: 5238 * Zero on success, negative errno on failure. 5239 */ 5240 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 5241 void *data, struct drm_file *file_priv) 5242 { 5243 struct drm_mode_crtc_lut *crtc_lut = data; 5244 struct drm_crtc *crtc; 5245 void *r_base, *g_base, *b_base; 5246 int size; 5247 int ret = 0; 5248 5249 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5250 return -EINVAL; 5251 5252 drm_modeset_lock_all(dev); 5253 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5254 if (!crtc) { 5255 ret = -ENOENT; 5256 goto out; 5257 } 5258 5259 /* memcpy into gamma store */ 5260 if (crtc_lut->gamma_size != crtc->gamma_size) { 5261 ret = -EINVAL; 5262 goto out; 5263 } 5264 5265 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5266 r_base = crtc->gamma_store; 5267 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 5268 ret = -EFAULT; 5269 goto out; 5270 } 5271 5272 g_base = r_base + size; 5273 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 5274 ret = -EFAULT; 5275 goto out; 5276 } 5277 5278 b_base = g_base + size; 5279 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 5280 ret = -EFAULT; 5281 goto out; 5282 } 5283 out: 5284 drm_modeset_unlock_all(dev); 5285 return ret; 5286 } 5287 5288 /** 5289 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 5290 * @dev: DRM device 5291 * @data: ioctl data 5292 * @file_priv: DRM file info 5293 * 5294 * This schedules an asynchronous update on a given CRTC, called page flip. 5295 * Optionally a drm event is generated to signal the completion of the event. 5296 * Generic drivers cannot assume that a pageflip with changed framebuffer 5297 * properties (including driver specific metadata like tiling layout) will work, 5298 * but some drivers support e.g. pixel format changes through the pageflip 5299 * ioctl. 5300 * 5301 * Called by the user via ioctl. 5302 * 5303 * Returns: 5304 * Zero on success, negative errno on failure. 5305 */ 5306 int drm_mode_page_flip_ioctl(struct drm_device *dev, 5307 void *data, struct drm_file *file_priv) 5308 { 5309 struct drm_mode_crtc_page_flip *page_flip = data; 5310 struct drm_crtc *crtc; 5311 struct drm_framebuffer *fb = NULL; 5312 struct drm_pending_vblank_event *e = NULL; 5313 int ret = -EINVAL; 5314 5315 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 5316 page_flip->reserved != 0) 5317 return -EINVAL; 5318 5319 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 5320 return -EINVAL; 5321 5322 crtc = drm_crtc_find(dev, page_flip->crtc_id); 5323 if (!crtc) 5324 return -ENOENT; 5325 5326 drm_modeset_lock_crtc(crtc, crtc->primary); 5327 if (crtc->primary->fb == NULL) { 5328 /* The framebuffer is currently unbound, presumably 5329 * due to a hotplug event, that userspace has not 5330 * yet discovered. 5331 */ 5332 ret = -EBUSY; 5333 goto out; 5334 } 5335 5336 if (crtc->funcs->page_flip == NULL) 5337 goto out; 5338 5339 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 5340 if (!fb) { 5341 ret = -ENOENT; 5342 goto out; 5343 } 5344 5345 if (crtc->state) { 5346 const struct drm_plane_state *state = crtc->primary->state; 5347 5348 ret = check_src_coords(state->src_x, state->src_y, 5349 state->src_w, state->src_h, fb); 5350 } else { 5351 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 5352 } 5353 if (ret) 5354 goto out; 5355 5356 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 5357 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 5358 ret = -EINVAL; 5359 goto out; 5360 } 5361 5362 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5363 e = kzalloc(sizeof *e, GFP_KERNEL); 5364 if (!e) { 5365 ret = -ENOMEM; 5366 goto out; 5367 } 5368 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 5369 e->event.base.length = sizeof(e->event); 5370 e->event.user_data = page_flip->user_data; 5371 ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base); 5372 if (ret) { 5373 kfree(e); 5374 goto out; 5375 } 5376 } 5377 5378 crtc->primary->old_fb = crtc->primary->fb; 5379 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 5380 if (ret) { 5381 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) 5382 drm_event_cancel_free(dev, &e->base); 5383 /* Keep the old fb, don't unref it. */ 5384 crtc->primary->old_fb = NULL; 5385 } else { 5386 crtc->primary->fb = fb; 5387 /* Unref only the old framebuffer. */ 5388 fb = NULL; 5389 } 5390 5391 out: 5392 if (fb) 5393 drm_framebuffer_unreference(fb); 5394 if (crtc->primary->old_fb) 5395 drm_framebuffer_unreference(crtc->primary->old_fb); 5396 crtc->primary->old_fb = NULL; 5397 drm_modeset_unlock_crtc(crtc); 5398 5399 return ret; 5400 } 5401 5402 /** 5403 * drm_mode_config_reset - call ->reset callbacks 5404 * @dev: drm device 5405 * 5406 * This functions calls all the crtc's, encoder's and connector's ->reset 5407 * callback. Drivers can use this in e.g. their driver load or resume code to 5408 * reset hardware and software state. 5409 */ 5410 void drm_mode_config_reset(struct drm_device *dev) 5411 { 5412 struct drm_crtc *crtc; 5413 struct drm_plane *plane; 5414 struct drm_encoder *encoder; 5415 struct drm_connector *connector; 5416 5417 drm_for_each_plane(plane, dev) 5418 if (plane->funcs->reset) 5419 plane->funcs->reset(plane); 5420 5421 drm_for_each_crtc(crtc, dev) 5422 if (crtc->funcs->reset) 5423 crtc->funcs->reset(crtc); 5424 5425 drm_for_each_encoder(encoder, dev) 5426 if (encoder->funcs->reset) 5427 encoder->funcs->reset(encoder); 5428 5429 mutex_lock(&dev->mode_config.mutex); 5430 drm_for_each_connector(connector, dev) 5431 if (connector->funcs->reset) 5432 connector->funcs->reset(connector); 5433 mutex_unlock(&dev->mode_config.mutex); 5434 } 5435 EXPORT_SYMBOL(drm_mode_config_reset); 5436 5437 /** 5438 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 5439 * @dev: DRM device 5440 * @data: ioctl data 5441 * @file_priv: DRM file info 5442 * 5443 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 5444 * TTM or something else entirely) and returns the resulting buffer handle. This 5445 * handle can then be wrapped up into a framebuffer modeset object. 5446 * 5447 * Note that userspace is not allowed to use such objects for render 5448 * acceleration - drivers must create their own private ioctls for such a use 5449 * case. 5450 * 5451 * Called by the user via ioctl. 5452 * 5453 * Returns: 5454 * Zero on success, negative errno on failure. 5455 */ 5456 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 5457 void *data, struct drm_file *file_priv) 5458 { 5459 struct drm_mode_create_dumb *args = data; 5460 u32 cpp, stride, size; 5461 5462 if (!dev->driver->dumb_create) 5463 return -ENOSYS; 5464 if (!args->width || !args->height || !args->bpp) 5465 return -EINVAL; 5466 5467 /* overflow checks for 32bit size calculations */ 5468 /* NOTE: DIV_ROUND_UP() can overflow */ 5469 cpp = DIV_ROUND_UP(args->bpp, 8); 5470 if (!cpp || cpp > 0xffffffffU / args->width) 5471 return -EINVAL; 5472 stride = cpp * args->width; 5473 if (args->height > 0xffffffffU / stride) 5474 return -EINVAL; 5475 5476 /* test for wrap-around */ 5477 size = args->height * stride; 5478 if (PAGE_ALIGN(size) == 0) 5479 return -EINVAL; 5480 5481 /* 5482 * handle, pitch and size are output parameters. Zero them out to 5483 * prevent drivers from accidentally using uninitialized data. Since 5484 * not all existing userspace is clearing these fields properly we 5485 * cannot reject IOCTL with garbage in them. 5486 */ 5487 args->handle = 0; 5488 args->pitch = 0; 5489 args->size = 0; 5490 5491 return dev->driver->dumb_create(file_priv, dev, args); 5492 } 5493 5494 /** 5495 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 5496 * @dev: DRM device 5497 * @data: ioctl data 5498 * @file_priv: DRM file info 5499 * 5500 * Allocate an offset in the drm device node's address space to be able to 5501 * memory map a dumb buffer. 5502 * 5503 * Called by the user via ioctl. 5504 * 5505 * Returns: 5506 * Zero on success, negative errno on failure. 5507 */ 5508 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 5509 void *data, struct drm_file *file_priv) 5510 { 5511 struct drm_mode_map_dumb *args = data; 5512 5513 /* call driver ioctl to get mmap offset */ 5514 if (!dev->driver->dumb_map_offset) 5515 return -ENOSYS; 5516 5517 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 5518 } 5519 5520 /** 5521 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 5522 * @dev: DRM device 5523 * @data: ioctl data 5524 * @file_priv: DRM file info 5525 * 5526 * This destroys the userspace handle for the given dumb backing storage buffer. 5527 * Since buffer objects must be reference counted in the kernel a buffer object 5528 * won't be immediately freed if a framebuffer modeset object still uses it. 5529 * 5530 * Called by the user via ioctl. 5531 * 5532 * Returns: 5533 * Zero on success, negative errno on failure. 5534 */ 5535 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 5536 void *data, struct drm_file *file_priv) 5537 { 5538 struct drm_mode_destroy_dumb *args = data; 5539 5540 if (!dev->driver->dumb_destroy) 5541 return -ENOSYS; 5542 5543 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 5544 } 5545 5546 /** 5547 * drm_fb_get_bpp_depth - get the bpp/depth values for format 5548 * @format: pixel format (DRM_FORMAT_*) 5549 * @depth: storage for the depth value 5550 * @bpp: storage for the bpp value 5551 * 5552 * This only supports RGB formats here for compat with code that doesn't use 5553 * pixel formats directly yet. 5554 */ 5555 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 5556 int *bpp) 5557 { 5558 switch (format) { 5559 case DRM_FORMAT_C8: 5560 case DRM_FORMAT_RGB332: 5561 case DRM_FORMAT_BGR233: 5562 *depth = 8; 5563 *bpp = 8; 5564 break; 5565 case DRM_FORMAT_XRGB1555: 5566 case DRM_FORMAT_XBGR1555: 5567 case DRM_FORMAT_RGBX5551: 5568 case DRM_FORMAT_BGRX5551: 5569 case DRM_FORMAT_ARGB1555: 5570 case DRM_FORMAT_ABGR1555: 5571 case DRM_FORMAT_RGBA5551: 5572 case DRM_FORMAT_BGRA5551: 5573 *depth = 15; 5574 *bpp = 16; 5575 break; 5576 case DRM_FORMAT_RGB565: 5577 case DRM_FORMAT_BGR565: 5578 *depth = 16; 5579 *bpp = 16; 5580 break; 5581 case DRM_FORMAT_RGB888: 5582 case DRM_FORMAT_BGR888: 5583 *depth = 24; 5584 *bpp = 24; 5585 break; 5586 case DRM_FORMAT_XRGB8888: 5587 case DRM_FORMAT_XBGR8888: 5588 case DRM_FORMAT_RGBX8888: 5589 case DRM_FORMAT_BGRX8888: 5590 *depth = 24; 5591 *bpp = 32; 5592 break; 5593 case DRM_FORMAT_XRGB2101010: 5594 case DRM_FORMAT_XBGR2101010: 5595 case DRM_FORMAT_RGBX1010102: 5596 case DRM_FORMAT_BGRX1010102: 5597 case DRM_FORMAT_ARGB2101010: 5598 case DRM_FORMAT_ABGR2101010: 5599 case DRM_FORMAT_RGBA1010102: 5600 case DRM_FORMAT_BGRA1010102: 5601 *depth = 30; 5602 *bpp = 32; 5603 break; 5604 case DRM_FORMAT_ARGB8888: 5605 case DRM_FORMAT_ABGR8888: 5606 case DRM_FORMAT_RGBA8888: 5607 case DRM_FORMAT_BGRA8888: 5608 *depth = 32; 5609 *bpp = 32; 5610 break; 5611 default: 5612 DRM_DEBUG_KMS("unsupported pixel format %s\n", 5613 drm_get_format_name(format)); 5614 *depth = 0; 5615 *bpp = 0; 5616 break; 5617 } 5618 } 5619 EXPORT_SYMBOL(drm_fb_get_bpp_depth); 5620 5621 /** 5622 * drm_format_num_planes - get the number of planes for format 5623 * @format: pixel format (DRM_FORMAT_*) 5624 * 5625 * Returns: 5626 * The number of planes used by the specified pixel format. 5627 */ 5628 int drm_format_num_planes(uint32_t format) 5629 { 5630 switch (format) { 5631 case DRM_FORMAT_YUV410: 5632 case DRM_FORMAT_YVU410: 5633 case DRM_FORMAT_YUV411: 5634 case DRM_FORMAT_YVU411: 5635 case DRM_FORMAT_YUV420: 5636 case DRM_FORMAT_YVU420: 5637 case DRM_FORMAT_YUV422: 5638 case DRM_FORMAT_YVU422: 5639 case DRM_FORMAT_YUV444: 5640 case DRM_FORMAT_YVU444: 5641 return 3; 5642 case DRM_FORMAT_NV12: 5643 case DRM_FORMAT_NV21: 5644 case DRM_FORMAT_NV16: 5645 case DRM_FORMAT_NV61: 5646 case DRM_FORMAT_NV24: 5647 case DRM_FORMAT_NV42: 5648 return 2; 5649 default: 5650 return 1; 5651 } 5652 } 5653 EXPORT_SYMBOL(drm_format_num_planes); 5654 5655 /** 5656 * drm_format_plane_cpp - determine the bytes per pixel value 5657 * @format: pixel format (DRM_FORMAT_*) 5658 * @plane: plane index 5659 * 5660 * Returns: 5661 * The bytes per pixel value for the specified plane. 5662 */ 5663 int drm_format_plane_cpp(uint32_t format, int plane) 5664 { 5665 unsigned int depth; 5666 int bpp; 5667 5668 if (plane >= drm_format_num_planes(format)) 5669 return 0; 5670 5671 switch (format) { 5672 case DRM_FORMAT_YUYV: 5673 case DRM_FORMAT_YVYU: 5674 case DRM_FORMAT_UYVY: 5675 case DRM_FORMAT_VYUY: 5676 return 2; 5677 case DRM_FORMAT_NV12: 5678 case DRM_FORMAT_NV21: 5679 case DRM_FORMAT_NV16: 5680 case DRM_FORMAT_NV61: 5681 case DRM_FORMAT_NV24: 5682 case DRM_FORMAT_NV42: 5683 return plane ? 2 : 1; 5684 case DRM_FORMAT_YUV410: 5685 case DRM_FORMAT_YVU410: 5686 case DRM_FORMAT_YUV411: 5687 case DRM_FORMAT_YVU411: 5688 case DRM_FORMAT_YUV420: 5689 case DRM_FORMAT_YVU420: 5690 case DRM_FORMAT_YUV422: 5691 case DRM_FORMAT_YVU422: 5692 case DRM_FORMAT_YUV444: 5693 case DRM_FORMAT_YVU444: 5694 return 1; 5695 default: 5696 drm_fb_get_bpp_depth(format, &depth, &bpp); 5697 return bpp >> 3; 5698 } 5699 } 5700 EXPORT_SYMBOL(drm_format_plane_cpp); 5701 5702 /** 5703 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 5704 * @format: pixel format (DRM_FORMAT_*) 5705 * 5706 * Returns: 5707 * The horizontal chroma subsampling factor for the 5708 * specified pixel format. 5709 */ 5710 int drm_format_horz_chroma_subsampling(uint32_t format) 5711 { 5712 switch (format) { 5713 case DRM_FORMAT_YUV411: 5714 case DRM_FORMAT_YVU411: 5715 case DRM_FORMAT_YUV410: 5716 case DRM_FORMAT_YVU410: 5717 return 4; 5718 case DRM_FORMAT_YUYV: 5719 case DRM_FORMAT_YVYU: 5720 case DRM_FORMAT_UYVY: 5721 case DRM_FORMAT_VYUY: 5722 case DRM_FORMAT_NV12: 5723 case DRM_FORMAT_NV21: 5724 case DRM_FORMAT_NV16: 5725 case DRM_FORMAT_NV61: 5726 case DRM_FORMAT_YUV422: 5727 case DRM_FORMAT_YVU422: 5728 case DRM_FORMAT_YUV420: 5729 case DRM_FORMAT_YVU420: 5730 return 2; 5731 default: 5732 return 1; 5733 } 5734 } 5735 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5736 5737 /** 5738 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5739 * @format: pixel format (DRM_FORMAT_*) 5740 * 5741 * Returns: 5742 * The vertical chroma subsampling factor for the 5743 * specified pixel format. 5744 */ 5745 int drm_format_vert_chroma_subsampling(uint32_t format) 5746 { 5747 switch (format) { 5748 case DRM_FORMAT_YUV410: 5749 case DRM_FORMAT_YVU410: 5750 return 4; 5751 case DRM_FORMAT_YUV420: 5752 case DRM_FORMAT_YVU420: 5753 case DRM_FORMAT_NV12: 5754 case DRM_FORMAT_NV21: 5755 return 2; 5756 default: 5757 return 1; 5758 } 5759 } 5760 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5761 5762 /** 5763 * drm_format_plane_width - width of the plane given the first plane 5764 * @width: width of the first plane 5765 * @format: pixel format 5766 * @plane: plane index 5767 * 5768 * Returns: 5769 * The width of @plane, given that the width of the first plane is @width. 5770 */ 5771 int drm_format_plane_width(int width, uint32_t format, int plane) 5772 { 5773 if (plane >= drm_format_num_planes(format)) 5774 return 0; 5775 5776 if (plane == 0) 5777 return width; 5778 5779 return width / drm_format_horz_chroma_subsampling(format); 5780 } 5781 EXPORT_SYMBOL(drm_format_plane_width); 5782 5783 /** 5784 * drm_format_plane_height - height of the plane given the first plane 5785 * @height: height of the first plane 5786 * @format: pixel format 5787 * @plane: plane index 5788 * 5789 * Returns: 5790 * The height of @plane, given that the height of the first plane is @height. 5791 */ 5792 int drm_format_plane_height(int height, uint32_t format, int plane) 5793 { 5794 if (plane >= drm_format_num_planes(format)) 5795 return 0; 5796 5797 if (plane == 0) 5798 return height; 5799 5800 return height / drm_format_vert_chroma_subsampling(format); 5801 } 5802 EXPORT_SYMBOL(drm_format_plane_height); 5803 5804 /** 5805 * drm_rotation_simplify() - Try to simplify the rotation 5806 * @rotation: Rotation to be simplified 5807 * @supported_rotations: Supported rotations 5808 * 5809 * Attempt to simplify the rotation to a form that is supported. 5810 * Eg. if the hardware supports everything except DRM_REFLECT_X 5811 * one could call this function like this: 5812 * 5813 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5814 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5815 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5816 * 5817 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5818 * transforms the hardware supports, this function may not 5819 * be able to produce a supported transform, so the caller should 5820 * check the result afterwards. 5821 */ 5822 unsigned int drm_rotation_simplify(unsigned int rotation, 5823 unsigned int supported_rotations) 5824 { 5825 if (rotation & ~supported_rotations) { 5826 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5827 rotation = (rotation & DRM_REFLECT_MASK) | 5828 BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4); 5829 } 5830 5831 return rotation; 5832 } 5833 EXPORT_SYMBOL(drm_rotation_simplify); 5834 5835 /** 5836 * drm_mode_config_init - initialize DRM mode_configuration structure 5837 * @dev: DRM device 5838 * 5839 * Initialize @dev's mode_config structure, used for tracking the graphics 5840 * configuration of @dev. 5841 * 5842 * Since this initializes the modeset locks, no locking is possible. Which is no 5843 * problem, since this should happen single threaded at init time. It is the 5844 * driver's problem to ensure this guarantee. 5845 * 5846 */ 5847 void drm_mode_config_init(struct drm_device *dev) 5848 { 5849 mutex_init(&dev->mode_config.mutex); 5850 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5851 mutex_init(&dev->mode_config.idr_mutex); 5852 mutex_init(&dev->mode_config.fb_lock); 5853 mutex_init(&dev->mode_config.blob_lock); 5854 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5855 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5856 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5857 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5858 INIT_LIST_HEAD(&dev->mode_config.property_list); 5859 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5860 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5861 idr_init(&dev->mode_config.crtc_idr); 5862 idr_init(&dev->mode_config.tile_idr); 5863 ida_init(&dev->mode_config.connector_ida); 5864 5865 drm_modeset_lock_all(dev); 5866 drm_mode_create_standard_properties(dev); 5867 drm_modeset_unlock_all(dev); 5868 5869 /* Just to be sure */ 5870 dev->mode_config.num_fb = 0; 5871 dev->mode_config.num_connector = 0; 5872 dev->mode_config.num_crtc = 0; 5873 dev->mode_config.num_encoder = 0; 5874 dev->mode_config.num_overlay_plane = 0; 5875 dev->mode_config.num_total_plane = 0; 5876 } 5877 EXPORT_SYMBOL(drm_mode_config_init); 5878 5879 /** 5880 * drm_mode_config_cleanup - free up DRM mode_config info 5881 * @dev: DRM device 5882 * 5883 * Free up all the connectors and CRTCs associated with this DRM device, then 5884 * free up the framebuffers and associated buffer objects. 5885 * 5886 * Note that since this /should/ happen single-threaded at driver/device 5887 * teardown time, no locking is required. It's the driver's job to ensure that 5888 * this guarantee actually holds true. 5889 * 5890 * FIXME: cleanup any dangling user buffer objects too 5891 */ 5892 void drm_mode_config_cleanup(struct drm_device *dev) 5893 { 5894 struct drm_connector *connector, *ot; 5895 struct drm_crtc *crtc, *ct; 5896 struct drm_encoder *encoder, *enct; 5897 struct drm_framebuffer *fb, *fbt; 5898 struct drm_property *property, *pt; 5899 struct drm_property_blob *blob, *bt; 5900 struct drm_plane *plane, *plt; 5901 5902 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5903 head) { 5904 encoder->funcs->destroy(encoder); 5905 } 5906 5907 list_for_each_entry_safe(connector, ot, 5908 &dev->mode_config.connector_list, head) { 5909 connector->funcs->destroy(connector); 5910 } 5911 5912 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5913 head) { 5914 drm_property_destroy(dev, property); 5915 } 5916 5917 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5918 head_global) { 5919 drm_property_unreference_blob(blob); 5920 } 5921 5922 /* 5923 * Single-threaded teardown context, so it's not required to grab the 5924 * fb_lock to protect against concurrent fb_list access. Contrary, it 5925 * would actually deadlock with the drm_framebuffer_cleanup function. 5926 * 5927 * Also, if there are any framebuffers left, that's a driver leak now, 5928 * so politely WARN about this. 5929 */ 5930 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5931 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5932 drm_framebuffer_free(&fb->refcount); 5933 } 5934 5935 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5936 head) { 5937 plane->funcs->destroy(plane); 5938 } 5939 5940 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5941 crtc->funcs->destroy(crtc); 5942 } 5943 5944 ida_destroy(&dev->mode_config.connector_ida); 5945 idr_destroy(&dev->mode_config.tile_idr); 5946 idr_destroy(&dev->mode_config.crtc_idr); 5947 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5948 } 5949 EXPORT_SYMBOL(drm_mode_config_cleanup); 5950 5951 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5952 unsigned int supported_rotations) 5953 { 5954 static const struct drm_prop_enum_list props[] = { 5955 { DRM_ROTATE_0, "rotate-0" }, 5956 { DRM_ROTATE_90, "rotate-90" }, 5957 { DRM_ROTATE_180, "rotate-180" }, 5958 { DRM_ROTATE_270, "rotate-270" }, 5959 { DRM_REFLECT_X, "reflect-x" }, 5960 { DRM_REFLECT_Y, "reflect-y" }, 5961 }; 5962 5963 return drm_property_create_bitmask(dev, 0, "rotation", 5964 props, ARRAY_SIZE(props), 5965 supported_rotations); 5966 } 5967 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5968 5969 /** 5970 * DOC: Tile group 5971 * 5972 * Tile groups are used to represent tiled monitors with a unique 5973 * integer identifier. Tiled monitors using DisplayID v1.3 have 5974 * a unique 8-byte handle, we store this in a tile group, so we 5975 * have a common identifier for all tiles in a monitor group. 5976 */ 5977 static void drm_tile_group_free(struct kref *kref) 5978 { 5979 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5980 struct drm_device *dev = tg->dev; 5981 mutex_lock(&dev->mode_config.idr_mutex); 5982 idr_remove(&dev->mode_config.tile_idr, tg->id); 5983 mutex_unlock(&dev->mode_config.idr_mutex); 5984 kfree(tg); 5985 } 5986 5987 /** 5988 * drm_mode_put_tile_group - drop a reference to a tile group. 5989 * @dev: DRM device 5990 * @tg: tile group to drop reference to. 5991 * 5992 * drop reference to tile group and free if 0. 5993 */ 5994 void drm_mode_put_tile_group(struct drm_device *dev, 5995 struct drm_tile_group *tg) 5996 { 5997 kref_put(&tg->refcount, drm_tile_group_free); 5998 } 5999 6000 /** 6001 * drm_mode_get_tile_group - get a reference to an existing tile group 6002 * @dev: DRM device 6003 * @topology: 8-bytes unique per monitor. 6004 * 6005 * Use the unique bytes to get a reference to an existing tile group. 6006 * 6007 * RETURNS: 6008 * tile group or NULL if not found. 6009 */ 6010 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 6011 char topology[8]) 6012 { 6013 struct drm_tile_group *tg; 6014 int id; 6015 mutex_lock(&dev->mode_config.idr_mutex); 6016 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 6017 if (!memcmp(tg->group_data, topology, 8)) { 6018 if (!kref_get_unless_zero(&tg->refcount)) 6019 tg = NULL; 6020 mutex_unlock(&dev->mode_config.idr_mutex); 6021 return tg; 6022 } 6023 } 6024 mutex_unlock(&dev->mode_config.idr_mutex); 6025 return NULL; 6026 } 6027 EXPORT_SYMBOL(drm_mode_get_tile_group); 6028 6029 /** 6030 * drm_mode_create_tile_group - create a tile group from a displayid description 6031 * @dev: DRM device 6032 * @topology: 8-bytes unique per monitor. 6033 * 6034 * Create a tile group for the unique monitor, and get a unique 6035 * identifier for the tile group. 6036 * 6037 * RETURNS: 6038 * new tile group or error. 6039 */ 6040 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 6041 char topology[8]) 6042 { 6043 struct drm_tile_group *tg; 6044 int ret; 6045 6046 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 6047 if (!tg) 6048 return ERR_PTR(-ENOMEM); 6049 6050 kref_init(&tg->refcount); 6051 memcpy(tg->group_data, topology, 8); 6052 tg->dev = dev; 6053 6054 mutex_lock(&dev->mode_config.idr_mutex); 6055 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 6056 if (ret >= 0) { 6057 tg->id = ret; 6058 } else { 6059 kfree(tg); 6060 tg = ERR_PTR(ret); 6061 } 6062 6063 mutex_unlock(&dev->mode_config.idr_mutex); 6064 return tg; 6065 } 6066 EXPORT_SYMBOL(drm_mode_create_tile_group); 6067