1 /* 2 * Copyright (c) 2006-2008 Intel Corporation 3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 4 * Copyright (c) 2008 Red Hat Inc. 5 * 6 * DRM core CRTC related functions 7 * 8 * Permission to use, copy, modify, distribute, and sell this software and its 9 * documentation for any purpose is hereby granted without fee, provided that 10 * the above copyright notice appear in all copies and that both that copyright 11 * notice and this permission notice appear in supporting documentation, and 12 * that the name of the copyright holders not be used in advertising or 13 * publicity pertaining to distribution of the software without specific, 14 * written prior permission. The copyright holders make no representations 15 * about the suitability of this software for any purpose. It is provided "as 16 * is" without express or implied warranty. 17 * 18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 24 * OF THIS SOFTWARE. 25 * 26 * Authors: 27 * Keith Packard 28 * Eric Anholt <eric@anholt.net> 29 * Dave Airlie <airlied@linux.ie> 30 * Jesse Barnes <jesse.barnes@intel.com> 31 */ 32 #include <linux/ctype.h> 33 #include <linux/list.h> 34 #include <linux/slab.h> 35 #include <linux/export.h> 36 #include <drm/drmP.h> 37 #include <drm/drm_crtc.h> 38 #include <drm/drm_edid.h> 39 #include <drm/drm_fourcc.h> 40 #include <drm/drm_modeset_lock.h> 41 42 #include "drm_crtc_internal.h" 43 #include "drm_internal.h" 44 45 static struct drm_framebuffer *add_framebuffer_internal(struct drm_device *dev, 46 struct drm_mode_fb_cmd2 *r, 47 struct drm_file *file_priv); 48 49 /* Avoid boilerplate. I'm tired of typing. */ 50 #define DRM_ENUM_NAME_FN(fnname, list) \ 51 const char *fnname(int val) \ 52 { \ 53 int i; \ 54 for (i = 0; i < ARRAY_SIZE(list); i++) { \ 55 if (list[i].type == val) \ 56 return list[i].name; \ 57 } \ 58 return "(unknown)"; \ 59 } 60 61 /* 62 * Global properties 63 */ 64 static const struct drm_prop_enum_list drm_dpms_enum_list[] = 65 { { DRM_MODE_DPMS_ON, "On" }, 66 { DRM_MODE_DPMS_STANDBY, "Standby" }, 67 { DRM_MODE_DPMS_SUSPEND, "Suspend" }, 68 { DRM_MODE_DPMS_OFF, "Off" } 69 }; 70 71 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) 72 73 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = 74 { 75 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 76 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 77 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 78 }; 79 80 /* 81 * Optional properties 82 */ 83 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = 84 { 85 { DRM_MODE_SCALE_NONE, "None" }, 86 { DRM_MODE_SCALE_FULLSCREEN, "Full" }, 87 { DRM_MODE_SCALE_CENTER, "Center" }, 88 { DRM_MODE_SCALE_ASPECT, "Full aspect" }, 89 }; 90 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 { 102 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 103 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 104 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 105 }; 106 107 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) 108 109 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = 110 { 111 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 112 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 113 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 114 }; 115 116 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, 117 drm_dvi_i_subconnector_enum_list) 118 119 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = 120 { 121 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 122 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 123 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 124 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 125 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 126 }; 127 128 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) 129 130 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = 131 { 132 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 133 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 134 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 135 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 136 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 137 }; 138 139 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, 140 drm_tv_subconnector_enum_list) 141 142 static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = { 143 { DRM_MODE_DIRTY_OFF, "Off" }, 144 { DRM_MODE_DIRTY_ON, "On" }, 145 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" }, 146 }; 147 148 struct drm_conn_prop_enum_list { 149 int type; 150 const char *name; 151 struct ida ida; 152 }; 153 154 /* 155 * Connector and encoder types. 156 */ 157 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = 158 { { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, 159 { DRM_MODE_CONNECTOR_VGA, "VGA" }, 160 { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, 161 { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, 162 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, 163 { DRM_MODE_CONNECTOR_Composite, "Composite" }, 164 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, 165 { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, 166 { DRM_MODE_CONNECTOR_Component, "Component" }, 167 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, 168 { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, 169 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, 170 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, 171 { DRM_MODE_CONNECTOR_TV, "TV" }, 172 { DRM_MODE_CONNECTOR_eDP, "eDP" }, 173 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, 174 { DRM_MODE_CONNECTOR_DSI, "DSI" }, 175 }; 176 177 static const struct drm_prop_enum_list drm_encoder_enum_list[] = 178 { { DRM_MODE_ENCODER_NONE, "None" }, 179 { DRM_MODE_ENCODER_DAC, "DAC" }, 180 { DRM_MODE_ENCODER_TMDS, "TMDS" }, 181 { DRM_MODE_ENCODER_LVDS, "LVDS" }, 182 { DRM_MODE_ENCODER_TVDAC, "TV" }, 183 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" }, 184 { DRM_MODE_ENCODER_DSI, "DSI" }, 185 { DRM_MODE_ENCODER_DPMST, "DP MST" }, 186 }; 187 188 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = 189 { 190 { SubPixelUnknown, "Unknown" }, 191 { SubPixelHorizontalRGB, "Horizontal RGB" }, 192 { SubPixelHorizontalBGR, "Horizontal BGR" }, 193 { SubPixelVerticalRGB, "Vertical RGB" }, 194 { SubPixelVerticalBGR, "Vertical BGR" }, 195 { SubPixelNone, "None" }, 196 }; 197 198 void drm_connector_ida_init(void) 199 { 200 int i; 201 202 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 203 ida_init(&drm_connector_enum_list[i].ida); 204 } 205 206 void drm_connector_ida_destroy(void) 207 { 208 int i; 209 210 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 211 ida_destroy(&drm_connector_enum_list[i].ida); 212 } 213 214 /** 215 * drm_get_connector_status_name - return a string for connector status 216 * @status: connector status to compute name of 217 * 218 * In contrast to the other drm_get_*_name functions this one here returns a 219 * const pointer and hence is threadsafe. 220 */ 221 const char *drm_get_connector_status_name(enum drm_connector_status status) 222 { 223 if (status == connector_status_connected) 224 return "connected"; 225 else if (status == connector_status_disconnected) 226 return "disconnected"; 227 else 228 return "unknown"; 229 } 230 EXPORT_SYMBOL(drm_get_connector_status_name); 231 232 /** 233 * drm_get_subpixel_order_name - return a string for a given subpixel enum 234 * @order: enum of subpixel_order 235 * 236 * Note you could abuse this and return something out of bounds, but that 237 * would be a caller error. No unscrubbed user data should make it here. 238 */ 239 const char *drm_get_subpixel_order_name(enum subpixel_order order) 240 { 241 return drm_subpixel_enum_list[order].name; 242 } 243 EXPORT_SYMBOL(drm_get_subpixel_order_name); 244 245 static char printable_char(int c) 246 { 247 return isascii(c) && isprint(c) ? c : '?'; 248 } 249 250 /** 251 * drm_get_format_name - return a string for drm fourcc format 252 * @format: format to compute name of 253 * 254 * Note that the buffer used by this function is globally shared and owned by 255 * the function itself. 256 * 257 * FIXME: This isn't really multithreading safe. 258 */ 259 const char *drm_get_format_name(uint32_t format) 260 { 261 static char buf[32]; 262 263 snprintf(buf, sizeof(buf), 264 "%c%c%c%c %s-endian (0x%08x)", 265 printable_char(format & 0xff), 266 printable_char((format >> 8) & 0xff), 267 printable_char((format >> 16) & 0xff), 268 printable_char((format >> 24) & 0x7f), 269 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", 270 format); 271 272 return buf; 273 } 274 EXPORT_SYMBOL(drm_get_format_name); 275 276 /* 277 * Internal function to assign a slot in the object idr and optionally 278 * register the object into the idr. 279 */ 280 static int drm_mode_object_get_reg(struct drm_device *dev, 281 struct drm_mode_object *obj, 282 uint32_t obj_type, 283 bool register_obj) 284 { 285 int ret; 286 287 mutex_lock(&dev->mode_config.idr_mutex); 288 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); 289 if (ret >= 0) { 290 /* 291 * Set up the object linking under the protection of the idr 292 * lock so that other users can't see inconsistent state. 293 */ 294 obj->id = ret; 295 obj->type = obj_type; 296 } 297 mutex_unlock(&dev->mode_config.idr_mutex); 298 299 return ret < 0 ? ret : 0; 300 } 301 302 /** 303 * drm_mode_object_get - allocate a new modeset identifier 304 * @dev: DRM device 305 * @obj: object pointer, used to generate unique ID 306 * @obj_type: object type 307 * 308 * Create a unique identifier based on @ptr in @dev's identifier space. Used 309 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix 310 * modeset identifiers are _not_ reference counted. Hence don't use this for 311 * reference counted modeset objects like framebuffers. 312 * 313 * Returns: 314 * New unique (relative to other objects in @dev) integer identifier for the 315 * object. 316 */ 317 int drm_mode_object_get(struct drm_device *dev, 318 struct drm_mode_object *obj, uint32_t obj_type) 319 { 320 return drm_mode_object_get_reg(dev, obj, obj_type, true); 321 } 322 323 static void drm_mode_object_register(struct drm_device *dev, 324 struct drm_mode_object *obj) 325 { 326 mutex_lock(&dev->mode_config.idr_mutex); 327 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); 328 mutex_unlock(&dev->mode_config.idr_mutex); 329 } 330 331 /** 332 * drm_mode_object_put - free a modeset identifer 333 * @dev: DRM device 334 * @object: object to free 335 * 336 * Free @id from @dev's unique identifier pool. Note that despite the _get 337 * postfix modeset identifiers are _not_ reference counted. Hence don't use this 338 * for reference counted modeset objects like framebuffers. 339 */ 340 void drm_mode_object_put(struct drm_device *dev, 341 struct drm_mode_object *object) 342 { 343 mutex_lock(&dev->mode_config.idr_mutex); 344 idr_remove(&dev->mode_config.crtc_idr, object->id); 345 mutex_unlock(&dev->mode_config.idr_mutex); 346 } 347 348 static struct drm_mode_object *_object_find(struct drm_device *dev, 349 uint32_t id, uint32_t type) 350 { 351 struct drm_mode_object *obj = NULL; 352 353 mutex_lock(&dev->mode_config.idr_mutex); 354 obj = idr_find(&dev->mode_config.crtc_idr, id); 355 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) 356 obj = NULL; 357 if (obj && obj->id != id) 358 obj = NULL; 359 /* don't leak out unref'd fb's */ 360 if (obj && (obj->type == DRM_MODE_OBJECT_FB)) 361 obj = NULL; 362 mutex_unlock(&dev->mode_config.idr_mutex); 363 364 return obj; 365 } 366 367 /** 368 * drm_mode_object_find - look up a drm object with static lifetime 369 * @dev: drm device 370 * @id: id of the mode object 371 * @type: type of the mode object 372 * 373 * Note that framebuffers cannot be looked up with this functions - since those 374 * are reference counted, they need special treatment. Even with 375 * DRM_MODE_OBJECT_ANY (although that will simply return NULL 376 * rather than WARN_ON()). 377 */ 378 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, 379 uint32_t id, uint32_t type) 380 { 381 struct drm_mode_object *obj = NULL; 382 383 /* Framebuffers are reference counted and need their own lookup 384 * function.*/ 385 WARN_ON(type == DRM_MODE_OBJECT_FB); 386 obj = _object_find(dev, id, type); 387 return obj; 388 } 389 EXPORT_SYMBOL(drm_mode_object_find); 390 391 /** 392 * drm_framebuffer_init - initialize a framebuffer 393 * @dev: DRM device 394 * @fb: framebuffer to be initialized 395 * @funcs: ... with these functions 396 * 397 * Allocates an ID for the framebuffer's parent mode object, sets its mode 398 * functions & device file and adds it to the master fd list. 399 * 400 * IMPORTANT: 401 * This functions publishes the fb and makes it available for concurrent access 402 * by other users. Which means by this point the fb _must_ be fully set up - 403 * since all the fb attributes are invariant over its lifetime, no further 404 * locking but only correct reference counting is required. 405 * 406 * Returns: 407 * Zero on success, error code on failure. 408 */ 409 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, 410 const struct drm_framebuffer_funcs *funcs) 411 { 412 int ret; 413 414 mutex_lock(&dev->mode_config.fb_lock); 415 kref_init(&fb->refcount); 416 INIT_LIST_HEAD(&fb->filp_head); 417 fb->dev = dev; 418 fb->funcs = funcs; 419 420 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB); 421 if (ret) 422 goto out; 423 424 dev->mode_config.num_fb++; 425 list_add(&fb->head, &dev->mode_config.fb_list); 426 out: 427 mutex_unlock(&dev->mode_config.fb_lock); 428 429 return 0; 430 } 431 EXPORT_SYMBOL(drm_framebuffer_init); 432 433 /* dev->mode_config.fb_lock must be held! */ 434 static void __drm_framebuffer_unregister(struct drm_device *dev, 435 struct drm_framebuffer *fb) 436 { 437 mutex_lock(&dev->mode_config.idr_mutex); 438 idr_remove(&dev->mode_config.crtc_idr, fb->base.id); 439 mutex_unlock(&dev->mode_config.idr_mutex); 440 441 fb->base.id = 0; 442 } 443 444 static void drm_framebuffer_free(struct kref *kref) 445 { 446 struct drm_framebuffer *fb = 447 container_of(kref, struct drm_framebuffer, refcount); 448 struct drm_device *dev = fb->dev; 449 450 /* 451 * The lookup idr holds a weak reference, which has not necessarily been 452 * removed at this point. Check for that. 453 */ 454 mutex_lock(&dev->mode_config.fb_lock); 455 if (fb->base.id) { 456 /* Mark fb as reaped and drop idr ref. */ 457 __drm_framebuffer_unregister(dev, fb); 458 } 459 mutex_unlock(&dev->mode_config.fb_lock); 460 461 fb->funcs->destroy(fb); 462 } 463 464 static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev, 465 uint32_t id) 466 { 467 struct drm_mode_object *obj = NULL; 468 struct drm_framebuffer *fb; 469 470 mutex_lock(&dev->mode_config.idr_mutex); 471 obj = idr_find(&dev->mode_config.crtc_idr, id); 472 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id)) 473 fb = NULL; 474 else 475 fb = obj_to_fb(obj); 476 mutex_unlock(&dev->mode_config.idr_mutex); 477 478 return fb; 479 } 480 481 /** 482 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference 483 * @dev: drm device 484 * @id: id of the fb object 485 * 486 * If successful, this grabs an additional reference to the framebuffer - 487 * callers need to make sure to eventually unreference the returned framebuffer 488 * again, using @drm_framebuffer_unreference. 489 */ 490 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, 491 uint32_t id) 492 { 493 struct drm_framebuffer *fb; 494 495 mutex_lock(&dev->mode_config.fb_lock); 496 fb = __drm_framebuffer_lookup(dev, id); 497 if (fb) { 498 if (!kref_get_unless_zero(&fb->refcount)) 499 fb = NULL; 500 } 501 mutex_unlock(&dev->mode_config.fb_lock); 502 503 return fb; 504 } 505 EXPORT_SYMBOL(drm_framebuffer_lookup); 506 507 /** 508 * drm_framebuffer_unreference - unref a framebuffer 509 * @fb: framebuffer to unref 510 * 511 * This functions decrements the fb's refcount and frees it if it drops to zero. 512 */ 513 void drm_framebuffer_unreference(struct drm_framebuffer *fb) 514 { 515 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 516 kref_put(&fb->refcount, drm_framebuffer_free); 517 } 518 EXPORT_SYMBOL(drm_framebuffer_unreference); 519 520 /** 521 * drm_framebuffer_reference - incr the fb refcnt 522 * @fb: framebuffer 523 * 524 * This functions increments the fb's refcount. 525 */ 526 void drm_framebuffer_reference(struct drm_framebuffer *fb) 527 { 528 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 529 kref_get(&fb->refcount); 530 } 531 EXPORT_SYMBOL(drm_framebuffer_reference); 532 533 static void drm_framebuffer_free_bug(struct kref *kref) 534 { 535 BUG(); 536 } 537 538 static void __drm_framebuffer_unreference(struct drm_framebuffer *fb) 539 { 540 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 541 kref_put(&fb->refcount, drm_framebuffer_free_bug); 542 } 543 544 /** 545 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr 546 * @fb: fb to unregister 547 * 548 * Drivers need to call this when cleaning up driver-private framebuffers, e.g. 549 * those used for fbdev. Note that the caller must hold a reference of it's own, 550 * i.e. the object may not be destroyed through this call (since it'll lead to a 551 * locking inversion). 552 */ 553 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) 554 { 555 struct drm_device *dev = fb->dev; 556 557 mutex_lock(&dev->mode_config.fb_lock); 558 /* Mark fb as reaped and drop idr ref. */ 559 __drm_framebuffer_unregister(dev, fb); 560 mutex_unlock(&dev->mode_config.fb_lock); 561 } 562 EXPORT_SYMBOL(drm_framebuffer_unregister_private); 563 564 /** 565 * drm_framebuffer_cleanup - remove a framebuffer object 566 * @fb: framebuffer to remove 567 * 568 * Cleanup framebuffer. This function is intended to be used from the drivers 569 * ->destroy callback. It can also be used to clean up driver private 570 * framebuffers embedded into a larger structure. 571 * 572 * Note that this function does not remove the fb from active usuage - if it is 573 * still used anywhere, hilarity can ensue since userspace could call getfb on 574 * the id and get back -EINVAL. Obviously no concern at driver unload time. 575 * 576 * Also, the framebuffer will not be removed from the lookup idr - for 577 * user-created framebuffers this will happen in in the rmfb ioctl. For 578 * driver-private objects (e.g. for fbdev) drivers need to explicitly call 579 * drm_framebuffer_unregister_private. 580 */ 581 void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 582 { 583 struct drm_device *dev = fb->dev; 584 585 mutex_lock(&dev->mode_config.fb_lock); 586 list_del(&fb->head); 587 dev->mode_config.num_fb--; 588 mutex_unlock(&dev->mode_config.fb_lock); 589 } 590 EXPORT_SYMBOL(drm_framebuffer_cleanup); 591 592 /** 593 * drm_framebuffer_remove - remove and unreference a framebuffer object 594 * @fb: framebuffer to remove 595 * 596 * Scans all the CRTCs and planes in @dev's mode_config. If they're 597 * using @fb, removes it, setting it to NULL. Then drops the reference to the 598 * passed-in framebuffer. Might take the modeset locks. 599 * 600 * Note that this function optimizes the cleanup away if the caller holds the 601 * last reference to the framebuffer. It is also guaranteed to not take the 602 * modeset locks in this case. 603 */ 604 void drm_framebuffer_remove(struct drm_framebuffer *fb) 605 { 606 struct drm_device *dev = fb->dev; 607 struct drm_crtc *crtc; 608 struct drm_plane *plane; 609 struct drm_mode_set set; 610 int ret; 611 612 WARN_ON(!list_empty(&fb->filp_head)); 613 614 /* 615 * drm ABI mandates that we remove any deleted framebuffers from active 616 * useage. But since most sane clients only remove framebuffers they no 617 * longer need, try to optimize this away. 618 * 619 * Since we're holding a reference ourselves, observing a refcount of 1 620 * means that we're the last holder and can skip it. Also, the refcount 621 * can never increase from 1 again, so we don't need any barriers or 622 * locks. 623 * 624 * Note that userspace could try to race with use and instate a new 625 * usage _after_ we've cleared all current ones. End result will be an 626 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot 627 * in this manner. 628 */ 629 if (atomic_read(&fb->refcount.refcount) > 1) { 630 drm_modeset_lock_all(dev); 631 /* remove from any CRTC */ 632 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 633 if (crtc->primary->fb == fb) { 634 /* should turn off the crtc */ 635 memset(&set, 0, sizeof(struct drm_mode_set)); 636 set.crtc = crtc; 637 set.fb = NULL; 638 ret = drm_mode_set_config_internal(&set); 639 if (ret) 640 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); 641 } 642 } 643 644 list_for_each_entry(plane, &dev->mode_config.plane_list, head) { 645 if (plane->fb == fb) 646 drm_plane_force_disable(plane); 647 } 648 drm_modeset_unlock_all(dev); 649 } 650 651 drm_framebuffer_unreference(fb); 652 } 653 EXPORT_SYMBOL(drm_framebuffer_remove); 654 655 DEFINE_WW_CLASS(crtc_ww_class); 656 657 /** 658 * drm_crtc_init_with_planes - Initialise a new CRTC object with 659 * specified primary and cursor planes. 660 * @dev: DRM device 661 * @crtc: CRTC object to init 662 * @primary: Primary plane for CRTC 663 * @cursor: Cursor plane for CRTC 664 * @funcs: callbacks for the new CRTC 665 * 666 * Inits a new object created as base part of a driver crtc object. 667 * 668 * Returns: 669 * Zero on success, error code on failure. 670 */ 671 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 672 struct drm_plane *primary, 673 struct drm_plane *cursor, 674 const struct drm_crtc_funcs *funcs) 675 { 676 struct drm_mode_config *config = &dev->mode_config; 677 int ret; 678 679 crtc->dev = dev; 680 crtc->funcs = funcs; 681 crtc->invert_dimensions = false; 682 683 drm_modeset_lock_init(&crtc->mutex); 684 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 685 if (ret) 686 return ret; 687 688 crtc->base.properties = &crtc->properties; 689 690 list_add_tail(&crtc->head, &config->crtc_list); 691 config->num_crtc++; 692 693 crtc->primary = primary; 694 crtc->cursor = cursor; 695 if (primary) 696 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 697 if (cursor) 698 cursor->possible_crtcs = 1 << drm_crtc_index(crtc); 699 700 return 0; 701 } 702 EXPORT_SYMBOL(drm_crtc_init_with_planes); 703 704 /** 705 * drm_crtc_cleanup - Clean up the core crtc usage 706 * @crtc: CRTC to cleanup 707 * 708 * This function cleans up @crtc and removes it from the DRM mode setting 709 * core. Note that the function does *not* free the crtc structure itself, 710 * this is the responsibility of the caller. 711 */ 712 void drm_crtc_cleanup(struct drm_crtc *crtc) 713 { 714 struct drm_device *dev = crtc->dev; 715 716 kfree(crtc->gamma_store); 717 crtc->gamma_store = NULL; 718 719 drm_modeset_lock_fini(&crtc->mutex); 720 721 drm_mode_object_put(dev, &crtc->base); 722 list_del(&crtc->head); 723 dev->mode_config.num_crtc--; 724 725 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); 726 if (crtc->state && crtc->funcs->atomic_destroy_state) 727 crtc->funcs->atomic_destroy_state(crtc, crtc->state); 728 729 memset(crtc, 0, sizeof(*crtc)); 730 } 731 EXPORT_SYMBOL(drm_crtc_cleanup); 732 733 /** 734 * drm_crtc_index - find the index of a registered CRTC 735 * @crtc: CRTC to find index for 736 * 737 * Given a registered CRTC, return the index of that CRTC within a DRM 738 * device's list of CRTCs. 739 */ 740 unsigned int drm_crtc_index(struct drm_crtc *crtc) 741 { 742 unsigned int index = 0; 743 struct drm_crtc *tmp; 744 745 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { 746 if (tmp == crtc) 747 return index; 748 749 index++; 750 } 751 752 BUG(); 753 } 754 EXPORT_SYMBOL(drm_crtc_index); 755 756 /* 757 * drm_mode_remove - remove and free a mode 758 * @connector: connector list to modify 759 * @mode: mode to remove 760 * 761 * Remove @mode from @connector's mode list, then free it. 762 */ 763 static void drm_mode_remove(struct drm_connector *connector, 764 struct drm_display_mode *mode) 765 { 766 list_del(&mode->head); 767 drm_mode_destroy(connector->dev, mode); 768 } 769 770 /** 771 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 772 * @connector: connector to quwery 773 * 774 * The kernel supports per-connector configration of its consoles through 775 * use of the video= parameter. This function parses that option and 776 * extracts the user's specified mode (or enable/disable status) for a 777 * particular connector. This is typically only used during the early fbdev 778 * setup. 779 */ 780 static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 781 { 782 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 783 char *option = NULL; 784 785 if (fb_get_options(connector->name, &option)) 786 return; 787 788 if (!drm_mode_parse_command_line_for_connector(option, 789 connector, 790 mode)) 791 return; 792 793 if (mode->force) { 794 const char *s; 795 796 switch (mode->force) { 797 case DRM_FORCE_OFF: 798 s = "OFF"; 799 break; 800 case DRM_FORCE_ON_DIGITAL: 801 s = "ON - dig"; 802 break; 803 default: 804 case DRM_FORCE_ON: 805 s = "ON"; 806 break; 807 } 808 809 DRM_INFO("forcing %s connector %s\n", connector->name, s); 810 connector->force = mode->force; 811 } 812 813 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 814 connector->name, 815 mode->xres, mode->yres, 816 mode->refresh_specified ? mode->refresh : 60, 817 mode->rb ? " reduced blanking" : "", 818 mode->margins ? " with margins" : "", 819 mode->interlace ? " interlaced" : ""); 820 } 821 822 /** 823 * drm_connector_init - Init a preallocated connector 824 * @dev: DRM device 825 * @connector: the connector to init 826 * @funcs: callbacks for this connector 827 * @connector_type: user visible type of the connector 828 * 829 * Initialises a preallocated connector. Connectors should be 830 * subclassed as part of driver connector objects. 831 * 832 * Returns: 833 * Zero on success, error code on failure. 834 */ 835 int drm_connector_init(struct drm_device *dev, 836 struct drm_connector *connector, 837 const struct drm_connector_funcs *funcs, 838 int connector_type) 839 { 840 int ret; 841 struct ida *connector_ida = 842 &drm_connector_enum_list[connector_type].ida; 843 844 drm_modeset_lock_all(dev); 845 846 ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false); 847 if (ret) 848 goto out_unlock; 849 850 connector->base.properties = &connector->properties; 851 connector->dev = dev; 852 connector->funcs = funcs; 853 connector->connector_type = connector_type; 854 connector->connector_type_id = 855 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); 856 if (connector->connector_type_id < 0) { 857 ret = connector->connector_type_id; 858 goto out_put; 859 } 860 connector->name = 861 kasprintf(GFP_KERNEL, "%s-%d", 862 drm_connector_enum_list[connector_type].name, 863 connector->connector_type_id); 864 if (!connector->name) { 865 ret = -ENOMEM; 866 goto out_put; 867 } 868 869 INIT_LIST_HEAD(&connector->probed_modes); 870 INIT_LIST_HEAD(&connector->modes); 871 connector->edid_blob_ptr = NULL; 872 connector->status = connector_status_unknown; 873 874 drm_connector_get_cmdline_mode(connector); 875 876 /* We should add connectors at the end to avoid upsetting the connector 877 * index too much. */ 878 list_add_tail(&connector->head, &dev->mode_config.connector_list); 879 dev->mode_config.num_connector++; 880 881 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 882 drm_object_attach_property(&connector->base, 883 dev->mode_config.edid_property, 884 0); 885 886 drm_object_attach_property(&connector->base, 887 dev->mode_config.dpms_property, 0); 888 889 connector->debugfs_entry = NULL; 890 891 out_put: 892 if (ret) 893 drm_mode_object_put(dev, &connector->base); 894 895 out_unlock: 896 drm_modeset_unlock_all(dev); 897 898 return ret; 899 } 900 EXPORT_SYMBOL(drm_connector_init); 901 902 /** 903 * drm_connector_cleanup - cleans up an initialised connector 904 * @connector: connector to cleanup 905 * 906 * Cleans up the connector but doesn't free the object. 907 */ 908 void drm_connector_cleanup(struct drm_connector *connector) 909 { 910 struct drm_device *dev = connector->dev; 911 struct drm_display_mode *mode, *t; 912 913 if (connector->tile_group) { 914 drm_mode_put_tile_group(dev, connector->tile_group); 915 connector->tile_group = NULL; 916 } 917 918 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 919 drm_mode_remove(connector, mode); 920 921 list_for_each_entry_safe(mode, t, &connector->modes, head) 922 drm_mode_remove(connector, mode); 923 924 ida_remove(&drm_connector_enum_list[connector->connector_type].ida, 925 connector->connector_type_id); 926 927 drm_mode_object_put(dev, &connector->base); 928 kfree(connector->name); 929 connector->name = NULL; 930 list_del(&connector->head); 931 dev->mode_config.num_connector--; 932 933 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 934 if (connector->state && connector->funcs->atomic_destroy_state) 935 connector->funcs->atomic_destroy_state(connector, 936 connector->state); 937 938 memset(connector, 0, sizeof(*connector)); 939 } 940 EXPORT_SYMBOL(drm_connector_cleanup); 941 942 /** 943 * drm_connector_index - find the index of a registered connector 944 * @connector: connector to find index for 945 * 946 * Given a registered connector, return the index of that connector within a DRM 947 * device's list of connectors. 948 */ 949 unsigned int drm_connector_index(struct drm_connector *connector) 950 { 951 unsigned int index = 0; 952 struct drm_connector *tmp; 953 struct drm_mode_config *config = &connector->dev->mode_config; 954 955 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 956 957 list_for_each_entry(tmp, &connector->dev->mode_config.connector_list, head) { 958 if (tmp == connector) 959 return index; 960 961 index++; 962 } 963 964 BUG(); 965 } 966 EXPORT_SYMBOL(drm_connector_index); 967 968 /** 969 * drm_connector_register - register a connector 970 * @connector: the connector to register 971 * 972 * Register userspace interfaces for a connector 973 * 974 * Returns: 975 * Zero on success, error code on failure. 976 */ 977 int drm_connector_register(struct drm_connector *connector) 978 { 979 int ret; 980 981 drm_mode_object_register(connector->dev, &connector->base); 982 983 ret = drm_sysfs_connector_add(connector); 984 if (ret) 985 return ret; 986 987 ret = drm_debugfs_connector_add(connector); 988 if (ret) { 989 drm_sysfs_connector_remove(connector); 990 return ret; 991 } 992 993 return 0; 994 } 995 EXPORT_SYMBOL(drm_connector_register); 996 997 /** 998 * drm_connector_unregister - unregister a connector 999 * @connector: the connector to unregister 1000 * 1001 * Unregister userspace interfaces for a connector 1002 */ 1003 void drm_connector_unregister(struct drm_connector *connector) 1004 { 1005 drm_sysfs_connector_remove(connector); 1006 drm_debugfs_connector_remove(connector); 1007 } 1008 EXPORT_SYMBOL(drm_connector_unregister); 1009 1010 1011 /** 1012 * drm_connector_unplug_all - unregister connector userspace interfaces 1013 * @dev: drm device 1014 * 1015 * This function unregisters all connector userspace interfaces in sysfs. Should 1016 * be call when the device is disconnected, e.g. from an usb driver's 1017 * ->disconnect callback. 1018 */ 1019 void drm_connector_unplug_all(struct drm_device *dev) 1020 { 1021 struct drm_connector *connector; 1022 1023 /* taking the mode config mutex ends up in a clash with sysfs */ 1024 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1025 drm_connector_unregister(connector); 1026 1027 } 1028 EXPORT_SYMBOL(drm_connector_unplug_all); 1029 1030 /** 1031 * drm_bridge_init - initialize a drm transcoder/bridge 1032 * @dev: drm device 1033 * @bridge: transcoder/bridge to set up 1034 * @funcs: bridge function table 1035 * 1036 * Initialises a preallocated bridge. Bridges should be 1037 * subclassed as part of driver connector objects. 1038 * 1039 * Returns: 1040 * Zero on success, error code on failure. 1041 */ 1042 int drm_bridge_init(struct drm_device *dev, struct drm_bridge *bridge, 1043 const struct drm_bridge_funcs *funcs) 1044 { 1045 int ret; 1046 1047 drm_modeset_lock_all(dev); 1048 1049 ret = drm_mode_object_get(dev, &bridge->base, DRM_MODE_OBJECT_BRIDGE); 1050 if (ret) 1051 goto out; 1052 1053 bridge->dev = dev; 1054 bridge->funcs = funcs; 1055 1056 list_add_tail(&bridge->head, &dev->mode_config.bridge_list); 1057 dev->mode_config.num_bridge++; 1058 1059 out: 1060 drm_modeset_unlock_all(dev); 1061 return ret; 1062 } 1063 EXPORT_SYMBOL(drm_bridge_init); 1064 1065 /** 1066 * drm_bridge_cleanup - cleans up an initialised bridge 1067 * @bridge: bridge to cleanup 1068 * 1069 * Cleans up the bridge but doesn't free the object. 1070 */ 1071 void drm_bridge_cleanup(struct drm_bridge *bridge) 1072 { 1073 struct drm_device *dev = bridge->dev; 1074 1075 drm_modeset_lock_all(dev); 1076 drm_mode_object_put(dev, &bridge->base); 1077 list_del(&bridge->head); 1078 dev->mode_config.num_bridge--; 1079 drm_modeset_unlock_all(dev); 1080 1081 memset(bridge, 0, sizeof(*bridge)); 1082 } 1083 EXPORT_SYMBOL(drm_bridge_cleanup); 1084 1085 /** 1086 * drm_encoder_init - Init a preallocated encoder 1087 * @dev: drm device 1088 * @encoder: the encoder to init 1089 * @funcs: callbacks for this encoder 1090 * @encoder_type: user visible type of the encoder 1091 * 1092 * Initialises a preallocated encoder. Encoder should be 1093 * subclassed as part of driver encoder objects. 1094 * 1095 * Returns: 1096 * Zero on success, error code on failure. 1097 */ 1098 int drm_encoder_init(struct drm_device *dev, 1099 struct drm_encoder *encoder, 1100 const struct drm_encoder_funcs *funcs, 1101 int encoder_type) 1102 { 1103 int ret; 1104 1105 drm_modeset_lock_all(dev); 1106 1107 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1108 if (ret) 1109 goto out_unlock; 1110 1111 encoder->dev = dev; 1112 encoder->encoder_type = encoder_type; 1113 encoder->funcs = funcs; 1114 encoder->name = kasprintf(GFP_KERNEL, "%s-%d", 1115 drm_encoder_enum_list[encoder_type].name, 1116 encoder->base.id); 1117 if (!encoder->name) { 1118 ret = -ENOMEM; 1119 goto out_put; 1120 } 1121 1122 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1123 dev->mode_config.num_encoder++; 1124 1125 out_put: 1126 if (ret) 1127 drm_mode_object_put(dev, &encoder->base); 1128 1129 out_unlock: 1130 drm_modeset_unlock_all(dev); 1131 1132 return ret; 1133 } 1134 EXPORT_SYMBOL(drm_encoder_init); 1135 1136 /** 1137 * drm_encoder_cleanup - cleans up an initialised encoder 1138 * @encoder: encoder to cleanup 1139 * 1140 * Cleans up the encoder but doesn't free the object. 1141 */ 1142 void drm_encoder_cleanup(struct drm_encoder *encoder) 1143 { 1144 struct drm_device *dev = encoder->dev; 1145 drm_modeset_lock_all(dev); 1146 drm_mode_object_put(dev, &encoder->base); 1147 kfree(encoder->name); 1148 list_del(&encoder->head); 1149 dev->mode_config.num_encoder--; 1150 drm_modeset_unlock_all(dev); 1151 1152 memset(encoder, 0, sizeof(*encoder)); 1153 } 1154 EXPORT_SYMBOL(drm_encoder_cleanup); 1155 1156 /** 1157 * drm_universal_plane_init - Initialize a new universal plane object 1158 * @dev: DRM device 1159 * @plane: plane object to init 1160 * @possible_crtcs: bitmask of possible CRTCs 1161 * @funcs: callbacks for the new plane 1162 * @formats: array of supported formats (%DRM_FORMAT_*) 1163 * @format_count: number of elements in @formats 1164 * @type: type of plane (overlay, primary, cursor) 1165 * 1166 * Initializes a plane object of type @type. 1167 * 1168 * Returns: 1169 * Zero on success, error code on failure. 1170 */ 1171 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1172 unsigned long possible_crtcs, 1173 const struct drm_plane_funcs *funcs, 1174 const uint32_t *formats, uint32_t format_count, 1175 enum drm_plane_type type) 1176 { 1177 int ret; 1178 1179 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1180 if (ret) 1181 return ret; 1182 1183 drm_modeset_lock_init(&plane->mutex); 1184 1185 plane->base.properties = &plane->properties; 1186 plane->dev = dev; 1187 plane->funcs = funcs; 1188 plane->format_types = kmalloc(sizeof(uint32_t) * format_count, 1189 GFP_KERNEL); 1190 if (!plane->format_types) { 1191 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1192 drm_mode_object_put(dev, &plane->base); 1193 return -ENOMEM; 1194 } 1195 1196 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1197 plane->format_count = format_count; 1198 plane->possible_crtcs = possible_crtcs; 1199 plane->type = type; 1200 1201 list_add_tail(&plane->head, &dev->mode_config.plane_list); 1202 dev->mode_config.num_total_plane++; 1203 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1204 dev->mode_config.num_overlay_plane++; 1205 1206 drm_object_attach_property(&plane->base, 1207 dev->mode_config.plane_type_property, 1208 plane->type); 1209 1210 return 0; 1211 } 1212 EXPORT_SYMBOL(drm_universal_plane_init); 1213 1214 /** 1215 * drm_plane_init - Initialize a legacy plane 1216 * @dev: DRM device 1217 * @plane: plane object to init 1218 * @possible_crtcs: bitmask of possible CRTCs 1219 * @funcs: callbacks for the new plane 1220 * @formats: array of supported formats (%DRM_FORMAT_*) 1221 * @format_count: number of elements in @formats 1222 * @is_primary: plane type (primary vs overlay) 1223 * 1224 * Legacy API to initialize a DRM plane. 1225 * 1226 * New drivers should call drm_universal_plane_init() instead. 1227 * 1228 * Returns: 1229 * Zero on success, error code on failure. 1230 */ 1231 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1232 unsigned long possible_crtcs, 1233 const struct drm_plane_funcs *funcs, 1234 const uint32_t *formats, uint32_t format_count, 1235 bool is_primary) 1236 { 1237 enum drm_plane_type type; 1238 1239 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1240 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1241 formats, format_count, type); 1242 } 1243 EXPORT_SYMBOL(drm_plane_init); 1244 1245 /** 1246 * drm_plane_cleanup - Clean up the core plane usage 1247 * @plane: plane to cleanup 1248 * 1249 * This function cleans up @plane and removes it from the DRM mode setting 1250 * core. Note that the function does *not* free the plane structure itself, 1251 * this is the responsibility of the caller. 1252 */ 1253 void drm_plane_cleanup(struct drm_plane *plane) 1254 { 1255 struct drm_device *dev = plane->dev; 1256 1257 drm_modeset_lock_all(dev); 1258 kfree(plane->format_types); 1259 drm_mode_object_put(dev, &plane->base); 1260 1261 BUG_ON(list_empty(&plane->head)); 1262 1263 list_del(&plane->head); 1264 dev->mode_config.num_total_plane--; 1265 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1266 dev->mode_config.num_overlay_plane--; 1267 drm_modeset_unlock_all(dev); 1268 1269 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1270 if (plane->state && plane->funcs->atomic_destroy_state) 1271 plane->funcs->atomic_destroy_state(plane, plane->state); 1272 1273 memset(plane, 0, sizeof(*plane)); 1274 } 1275 EXPORT_SYMBOL(drm_plane_cleanup); 1276 1277 /** 1278 * drm_plane_index - find the index of a registered plane 1279 * @plane: plane to find index for 1280 * 1281 * Given a registered plane, return the index of that CRTC within a DRM 1282 * device's list of planes. 1283 */ 1284 unsigned int drm_plane_index(struct drm_plane *plane) 1285 { 1286 unsigned int index = 0; 1287 struct drm_plane *tmp; 1288 1289 list_for_each_entry(tmp, &plane->dev->mode_config.plane_list, head) { 1290 if (tmp == plane) 1291 return index; 1292 1293 index++; 1294 } 1295 1296 BUG(); 1297 } 1298 EXPORT_SYMBOL(drm_plane_index); 1299 1300 /** 1301 * drm_plane_force_disable - Forcibly disable a plane 1302 * @plane: plane to disable 1303 * 1304 * Forces the plane to be disabled. 1305 * 1306 * Used when the plane's current framebuffer is destroyed, 1307 * and when restoring fbdev mode. 1308 */ 1309 void drm_plane_force_disable(struct drm_plane *plane) 1310 { 1311 int ret; 1312 1313 if (!plane->fb) 1314 return; 1315 1316 plane->old_fb = plane->fb; 1317 ret = plane->funcs->disable_plane(plane); 1318 if (ret) { 1319 DRM_ERROR("failed to disable plane with busy fb\n"); 1320 plane->old_fb = NULL; 1321 return; 1322 } 1323 /* disconnect the plane from the fb and crtc: */ 1324 __drm_framebuffer_unreference(plane->old_fb); 1325 plane->old_fb = NULL; 1326 plane->fb = NULL; 1327 plane->crtc = NULL; 1328 } 1329 EXPORT_SYMBOL(drm_plane_force_disable); 1330 1331 static int drm_mode_create_standard_connector_properties(struct drm_device *dev) 1332 { 1333 struct drm_property *edid; 1334 struct drm_property *dpms; 1335 struct drm_property *dev_path; 1336 1337 /* 1338 * Standard properties (apply to all connectors) 1339 */ 1340 edid = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1341 DRM_MODE_PROP_IMMUTABLE, 1342 "EDID", 0); 1343 dev->mode_config.edid_property = edid; 1344 1345 dpms = drm_property_create_enum(dev, 0, 1346 "DPMS", drm_dpms_enum_list, 1347 ARRAY_SIZE(drm_dpms_enum_list)); 1348 dev->mode_config.dpms_property = dpms; 1349 1350 dev_path = drm_property_create(dev, 1351 DRM_MODE_PROP_BLOB | 1352 DRM_MODE_PROP_IMMUTABLE, 1353 "PATH", 0); 1354 dev->mode_config.path_property = dev_path; 1355 1356 dev->mode_config.tile_property = drm_property_create(dev, 1357 DRM_MODE_PROP_BLOB | 1358 DRM_MODE_PROP_IMMUTABLE, 1359 "TILE", 0); 1360 1361 return 0; 1362 } 1363 1364 static int drm_mode_create_standard_plane_properties(struct drm_device *dev) 1365 { 1366 struct drm_property *type; 1367 1368 /* 1369 * Standard properties (apply to all planes) 1370 */ 1371 type = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1372 "type", drm_plane_type_enum_list, 1373 ARRAY_SIZE(drm_plane_type_enum_list)); 1374 dev->mode_config.plane_type_property = type; 1375 1376 return 0; 1377 } 1378 1379 /** 1380 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1381 * @dev: DRM device 1382 * 1383 * Called by a driver the first time a DVI-I connector is made. 1384 */ 1385 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1386 { 1387 struct drm_property *dvi_i_selector; 1388 struct drm_property *dvi_i_subconnector; 1389 1390 if (dev->mode_config.dvi_i_select_subconnector_property) 1391 return 0; 1392 1393 dvi_i_selector = 1394 drm_property_create_enum(dev, 0, 1395 "select subconnector", 1396 drm_dvi_i_select_enum_list, 1397 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1398 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1399 1400 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1401 "subconnector", 1402 drm_dvi_i_subconnector_enum_list, 1403 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1404 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1405 1406 return 0; 1407 } 1408 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1409 1410 /** 1411 * drm_create_tv_properties - create TV specific connector properties 1412 * @dev: DRM device 1413 * @num_modes: number of different TV formats (modes) supported 1414 * @modes: array of pointers to strings containing name of each format 1415 * 1416 * Called by a driver's TV initialization routine, this function creates 1417 * the TV specific connector properties for a given device. Caller is 1418 * responsible for allocating a list of format names and passing them to 1419 * this routine. 1420 */ 1421 int drm_mode_create_tv_properties(struct drm_device *dev, 1422 unsigned int num_modes, 1423 char *modes[]) 1424 { 1425 struct drm_property *tv_selector; 1426 struct drm_property *tv_subconnector; 1427 unsigned int i; 1428 1429 if (dev->mode_config.tv_select_subconnector_property) 1430 return 0; 1431 1432 /* 1433 * Basic connector properties 1434 */ 1435 tv_selector = drm_property_create_enum(dev, 0, 1436 "select subconnector", 1437 drm_tv_select_enum_list, 1438 ARRAY_SIZE(drm_tv_select_enum_list)); 1439 dev->mode_config.tv_select_subconnector_property = tv_selector; 1440 1441 tv_subconnector = 1442 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1443 "subconnector", 1444 drm_tv_subconnector_enum_list, 1445 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1446 dev->mode_config.tv_subconnector_property = tv_subconnector; 1447 1448 /* 1449 * Other, TV specific properties: margins & TV modes. 1450 */ 1451 dev->mode_config.tv_left_margin_property = 1452 drm_property_create_range(dev, 0, "left margin", 0, 100); 1453 1454 dev->mode_config.tv_right_margin_property = 1455 drm_property_create_range(dev, 0, "right margin", 0, 100); 1456 1457 dev->mode_config.tv_top_margin_property = 1458 drm_property_create_range(dev, 0, "top margin", 0, 100); 1459 1460 dev->mode_config.tv_bottom_margin_property = 1461 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1462 1463 dev->mode_config.tv_mode_property = 1464 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1465 "mode", num_modes); 1466 for (i = 0; i < num_modes; i++) 1467 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1468 i, modes[i]); 1469 1470 dev->mode_config.tv_brightness_property = 1471 drm_property_create_range(dev, 0, "brightness", 0, 100); 1472 1473 dev->mode_config.tv_contrast_property = 1474 drm_property_create_range(dev, 0, "contrast", 0, 100); 1475 1476 dev->mode_config.tv_flicker_reduction_property = 1477 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1478 1479 dev->mode_config.tv_overscan_property = 1480 drm_property_create_range(dev, 0, "overscan", 0, 100); 1481 1482 dev->mode_config.tv_saturation_property = 1483 drm_property_create_range(dev, 0, "saturation", 0, 100); 1484 1485 dev->mode_config.tv_hue_property = 1486 drm_property_create_range(dev, 0, "hue", 0, 100); 1487 1488 return 0; 1489 } 1490 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1491 1492 /** 1493 * drm_mode_create_scaling_mode_property - create scaling mode property 1494 * @dev: DRM device 1495 * 1496 * Called by a driver the first time it's needed, must be attached to desired 1497 * connectors. 1498 */ 1499 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1500 { 1501 struct drm_property *scaling_mode; 1502 1503 if (dev->mode_config.scaling_mode_property) 1504 return 0; 1505 1506 scaling_mode = 1507 drm_property_create_enum(dev, 0, "scaling mode", 1508 drm_scaling_mode_enum_list, 1509 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1510 1511 dev->mode_config.scaling_mode_property = scaling_mode; 1512 1513 return 0; 1514 } 1515 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1516 1517 /** 1518 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1519 * @dev: DRM device 1520 * 1521 * Called by a driver the first time it's needed, must be attached to desired 1522 * connectors. 1523 * 1524 * Returns: 1525 * Zero on success, negative errno on failure. 1526 */ 1527 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1528 { 1529 if (dev->mode_config.aspect_ratio_property) 1530 return 0; 1531 1532 dev->mode_config.aspect_ratio_property = 1533 drm_property_create_enum(dev, 0, "aspect ratio", 1534 drm_aspect_ratio_enum_list, 1535 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1536 1537 if (dev->mode_config.aspect_ratio_property == NULL) 1538 return -ENOMEM; 1539 1540 return 0; 1541 } 1542 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1543 1544 /** 1545 * drm_mode_create_dirty_property - create dirty property 1546 * @dev: DRM device 1547 * 1548 * Called by a driver the first time it's needed, must be attached to desired 1549 * connectors. 1550 */ 1551 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1552 { 1553 struct drm_property *dirty_info; 1554 1555 if (dev->mode_config.dirty_info_property) 1556 return 0; 1557 1558 dirty_info = 1559 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1560 "dirty", 1561 drm_dirty_info_enum_list, 1562 ARRAY_SIZE(drm_dirty_info_enum_list)); 1563 dev->mode_config.dirty_info_property = dirty_info; 1564 1565 return 0; 1566 } 1567 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1568 1569 /** 1570 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1571 * @dev: DRM device 1572 * 1573 * Create the the suggested x/y offset property for connectors. 1574 */ 1575 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1576 { 1577 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1578 return 0; 1579 1580 dev->mode_config.suggested_x_property = 1581 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1582 1583 dev->mode_config.suggested_y_property = 1584 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1585 1586 if (dev->mode_config.suggested_x_property == NULL || 1587 dev->mode_config.suggested_y_property == NULL) 1588 return -ENOMEM; 1589 return 0; 1590 } 1591 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1592 1593 static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group) 1594 { 1595 uint32_t total_objects = 0; 1596 1597 total_objects += dev->mode_config.num_crtc; 1598 total_objects += dev->mode_config.num_connector; 1599 total_objects += dev->mode_config.num_encoder; 1600 total_objects += dev->mode_config.num_bridge; 1601 1602 group->id_list = kzalloc(total_objects * sizeof(uint32_t), GFP_KERNEL); 1603 if (!group->id_list) 1604 return -ENOMEM; 1605 1606 group->num_crtcs = 0; 1607 group->num_connectors = 0; 1608 group->num_encoders = 0; 1609 group->num_bridges = 0; 1610 return 0; 1611 } 1612 1613 void drm_mode_group_destroy(struct drm_mode_group *group) 1614 { 1615 kfree(group->id_list); 1616 group->id_list = NULL; 1617 } 1618 1619 /* 1620 * NOTE: Driver's shouldn't ever call drm_mode_group_init_legacy_group - it is 1621 * the drm core's responsibility to set up mode control groups. 1622 */ 1623 int drm_mode_group_init_legacy_group(struct drm_device *dev, 1624 struct drm_mode_group *group) 1625 { 1626 struct drm_crtc *crtc; 1627 struct drm_encoder *encoder; 1628 struct drm_connector *connector; 1629 struct drm_bridge *bridge; 1630 int ret; 1631 1632 if ((ret = drm_mode_group_init(dev, group))) 1633 return ret; 1634 1635 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 1636 group->id_list[group->num_crtcs++] = crtc->base.id; 1637 1638 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 1639 group->id_list[group->num_crtcs + group->num_encoders++] = 1640 encoder->base.id; 1641 1642 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1643 group->id_list[group->num_crtcs + group->num_encoders + 1644 group->num_connectors++] = connector->base.id; 1645 1646 list_for_each_entry(bridge, &dev->mode_config.bridge_list, head) 1647 group->id_list[group->num_crtcs + group->num_encoders + 1648 group->num_connectors + group->num_bridges++] = 1649 bridge->base.id; 1650 1651 return 0; 1652 } 1653 EXPORT_SYMBOL(drm_mode_group_init_legacy_group); 1654 1655 void drm_reinit_primary_mode_group(struct drm_device *dev) 1656 { 1657 drm_modeset_lock_all(dev); 1658 drm_mode_group_destroy(&dev->primary->mode_group); 1659 drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group); 1660 drm_modeset_unlock_all(dev); 1661 } 1662 EXPORT_SYMBOL(drm_reinit_primary_mode_group); 1663 1664 /** 1665 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1666 * @out: drm_mode_modeinfo struct to return to the user 1667 * @in: drm_display_mode to use 1668 * 1669 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1670 * the user. 1671 */ 1672 static void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out, 1673 const struct drm_display_mode *in) 1674 { 1675 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || 1676 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || 1677 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || 1678 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || 1679 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, 1680 "timing values too large for mode info\n"); 1681 1682 out->clock = in->clock; 1683 out->hdisplay = in->hdisplay; 1684 out->hsync_start = in->hsync_start; 1685 out->hsync_end = in->hsync_end; 1686 out->htotal = in->htotal; 1687 out->hskew = in->hskew; 1688 out->vdisplay = in->vdisplay; 1689 out->vsync_start = in->vsync_start; 1690 out->vsync_end = in->vsync_end; 1691 out->vtotal = in->vtotal; 1692 out->vscan = in->vscan; 1693 out->vrefresh = in->vrefresh; 1694 out->flags = in->flags; 1695 out->type = in->type; 1696 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1697 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1698 } 1699 1700 /** 1701 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 1702 * @out: drm_display_mode to return to the user 1703 * @in: drm_mode_modeinfo to use 1704 * 1705 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 1706 * the caller. 1707 * 1708 * Returns: 1709 * Zero on success, negative errno on failure. 1710 */ 1711 static int drm_crtc_convert_umode(struct drm_display_mode *out, 1712 const struct drm_mode_modeinfo *in) 1713 { 1714 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) 1715 return -ERANGE; 1716 1717 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1718 return -EINVAL; 1719 1720 out->clock = in->clock; 1721 out->hdisplay = in->hdisplay; 1722 out->hsync_start = in->hsync_start; 1723 out->hsync_end = in->hsync_end; 1724 out->htotal = in->htotal; 1725 out->hskew = in->hskew; 1726 out->vdisplay = in->vdisplay; 1727 out->vsync_start = in->vsync_start; 1728 out->vsync_end = in->vsync_end; 1729 out->vtotal = in->vtotal; 1730 out->vscan = in->vscan; 1731 out->vrefresh = in->vrefresh; 1732 out->flags = in->flags; 1733 out->type = in->type; 1734 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1735 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1736 1737 return 0; 1738 } 1739 1740 /** 1741 * drm_mode_getresources - get graphics configuration 1742 * @dev: drm device for the ioctl 1743 * @data: data pointer for the ioctl 1744 * @file_priv: drm file for the ioctl call 1745 * 1746 * Construct a set of configuration description structures and return 1747 * them to the user, including CRTC, connector and framebuffer configuration. 1748 * 1749 * Called by the user via ioctl. 1750 * 1751 * Returns: 1752 * Zero on success, negative errno on failure. 1753 */ 1754 int drm_mode_getresources(struct drm_device *dev, void *data, 1755 struct drm_file *file_priv) 1756 { 1757 struct drm_mode_card_res *card_res = data; 1758 struct list_head *lh; 1759 struct drm_framebuffer *fb; 1760 struct drm_connector *connector; 1761 struct drm_crtc *crtc; 1762 struct drm_encoder *encoder; 1763 int ret = 0; 1764 int connector_count = 0; 1765 int crtc_count = 0; 1766 int fb_count = 0; 1767 int encoder_count = 0; 1768 int copied = 0, i; 1769 uint32_t __user *fb_id; 1770 uint32_t __user *crtc_id; 1771 uint32_t __user *connector_id; 1772 uint32_t __user *encoder_id; 1773 struct drm_mode_group *mode_group; 1774 1775 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1776 return -EINVAL; 1777 1778 1779 mutex_lock(&file_priv->fbs_lock); 1780 /* 1781 * For the non-control nodes we need to limit the list of resources 1782 * by IDs in the group list for this node 1783 */ 1784 list_for_each(lh, &file_priv->fbs) 1785 fb_count++; 1786 1787 /* handle this in 4 parts */ 1788 /* FBs */ 1789 if (card_res->count_fbs >= fb_count) { 1790 copied = 0; 1791 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1792 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1793 if (put_user(fb->base.id, fb_id + copied)) { 1794 mutex_unlock(&file_priv->fbs_lock); 1795 return -EFAULT; 1796 } 1797 copied++; 1798 } 1799 } 1800 card_res->count_fbs = fb_count; 1801 mutex_unlock(&file_priv->fbs_lock); 1802 1803 /* mode_config.mutex protects the connector list against e.g. DP MST 1804 * connector hot-adding. CRTC/Plane lists are invariant. */ 1805 mutex_lock(&dev->mode_config.mutex); 1806 if (!drm_is_primary_client(file_priv)) { 1807 1808 mode_group = NULL; 1809 list_for_each(lh, &dev->mode_config.crtc_list) 1810 crtc_count++; 1811 1812 list_for_each(lh, &dev->mode_config.connector_list) 1813 connector_count++; 1814 1815 list_for_each(lh, &dev->mode_config.encoder_list) 1816 encoder_count++; 1817 } else { 1818 1819 mode_group = &file_priv->master->minor->mode_group; 1820 crtc_count = mode_group->num_crtcs; 1821 connector_count = mode_group->num_connectors; 1822 encoder_count = mode_group->num_encoders; 1823 } 1824 1825 card_res->max_height = dev->mode_config.max_height; 1826 card_res->min_height = dev->mode_config.min_height; 1827 card_res->max_width = dev->mode_config.max_width; 1828 card_res->min_width = dev->mode_config.min_width; 1829 1830 /* CRTCs */ 1831 if (card_res->count_crtcs >= crtc_count) { 1832 copied = 0; 1833 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1834 if (!mode_group) { 1835 list_for_each_entry(crtc, &dev->mode_config.crtc_list, 1836 head) { 1837 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 1838 if (put_user(crtc->base.id, crtc_id + copied)) { 1839 ret = -EFAULT; 1840 goto out; 1841 } 1842 copied++; 1843 } 1844 } else { 1845 for (i = 0; i < mode_group->num_crtcs; i++) { 1846 if (put_user(mode_group->id_list[i], 1847 crtc_id + copied)) { 1848 ret = -EFAULT; 1849 goto out; 1850 } 1851 copied++; 1852 } 1853 } 1854 } 1855 card_res->count_crtcs = crtc_count; 1856 1857 /* Encoders */ 1858 if (card_res->count_encoders >= encoder_count) { 1859 copied = 0; 1860 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1861 if (!mode_group) { 1862 list_for_each_entry(encoder, 1863 &dev->mode_config.encoder_list, 1864 head) { 1865 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1866 encoder->name); 1867 if (put_user(encoder->base.id, encoder_id + 1868 copied)) { 1869 ret = -EFAULT; 1870 goto out; 1871 } 1872 copied++; 1873 } 1874 } else { 1875 for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) { 1876 if (put_user(mode_group->id_list[i], 1877 encoder_id + copied)) { 1878 ret = -EFAULT; 1879 goto out; 1880 } 1881 copied++; 1882 } 1883 1884 } 1885 } 1886 card_res->count_encoders = encoder_count; 1887 1888 /* Connectors */ 1889 if (card_res->count_connectors >= connector_count) { 1890 copied = 0; 1891 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1892 if (!mode_group) { 1893 list_for_each_entry(connector, 1894 &dev->mode_config.connector_list, 1895 head) { 1896 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1897 connector->base.id, 1898 connector->name); 1899 if (put_user(connector->base.id, 1900 connector_id + copied)) { 1901 ret = -EFAULT; 1902 goto out; 1903 } 1904 copied++; 1905 } 1906 } else { 1907 int start = mode_group->num_crtcs + 1908 mode_group->num_encoders; 1909 for (i = start; i < start + mode_group->num_connectors; i++) { 1910 if (put_user(mode_group->id_list[i], 1911 connector_id + copied)) { 1912 ret = -EFAULT; 1913 goto out; 1914 } 1915 copied++; 1916 } 1917 } 1918 } 1919 card_res->count_connectors = connector_count; 1920 1921 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1922 card_res->count_connectors, card_res->count_encoders); 1923 1924 out: 1925 mutex_unlock(&dev->mode_config.mutex); 1926 return ret; 1927 } 1928 1929 /** 1930 * drm_mode_getcrtc - get CRTC configuration 1931 * @dev: drm device for the ioctl 1932 * @data: data pointer for the ioctl 1933 * @file_priv: drm file for the ioctl call 1934 * 1935 * Construct a CRTC configuration structure to return to the user. 1936 * 1937 * Called by the user via ioctl. 1938 * 1939 * Returns: 1940 * Zero on success, negative errno on failure. 1941 */ 1942 int drm_mode_getcrtc(struct drm_device *dev, 1943 void *data, struct drm_file *file_priv) 1944 { 1945 struct drm_mode_crtc *crtc_resp = data; 1946 struct drm_crtc *crtc; 1947 1948 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1949 return -EINVAL; 1950 1951 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 1952 if (!crtc) 1953 return -ENOENT; 1954 1955 drm_modeset_lock_crtc(crtc, crtc->primary); 1956 crtc_resp->x = crtc->x; 1957 crtc_resp->y = crtc->y; 1958 crtc_resp->gamma_size = crtc->gamma_size; 1959 if (crtc->primary->fb) 1960 crtc_resp->fb_id = crtc->primary->fb->base.id; 1961 else 1962 crtc_resp->fb_id = 0; 1963 1964 if (crtc->enabled) { 1965 1966 drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->mode); 1967 crtc_resp->mode_valid = 1; 1968 1969 } else { 1970 crtc_resp->mode_valid = 0; 1971 } 1972 drm_modeset_unlock_crtc(crtc); 1973 1974 return 0; 1975 } 1976 1977 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 1978 const struct drm_file *file_priv) 1979 { 1980 /* 1981 * If user-space hasn't configured the driver to expose the stereo 3D 1982 * modes, don't expose them. 1983 */ 1984 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 1985 return false; 1986 1987 return true; 1988 } 1989 1990 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 1991 { 1992 /* For atomic drivers only state objects are synchronously updated and 1993 * protected by modeset locks, so check those first. */ 1994 if (connector->state) 1995 return connector->state->best_encoder; 1996 return connector->encoder; 1997 } 1998 1999 /** 2000 * drm_mode_getconnector - get connector configuration 2001 * @dev: drm device for the ioctl 2002 * @data: data pointer for the ioctl 2003 * @file_priv: drm file for the ioctl call 2004 * 2005 * Construct a connector configuration structure to return to the user. 2006 * 2007 * Called by the user via ioctl. 2008 * 2009 * Returns: 2010 * Zero on success, negative errno on failure. 2011 */ 2012 int drm_mode_getconnector(struct drm_device *dev, void *data, 2013 struct drm_file *file_priv) 2014 { 2015 struct drm_mode_get_connector *out_resp = data; 2016 struct drm_connector *connector; 2017 struct drm_encoder *encoder; 2018 struct drm_display_mode *mode; 2019 int mode_count = 0; 2020 int props_count = 0; 2021 int encoders_count = 0; 2022 int ret = 0; 2023 int copied = 0; 2024 int i; 2025 struct drm_mode_modeinfo u_mode; 2026 struct drm_mode_modeinfo __user *mode_ptr; 2027 uint32_t __user *prop_ptr; 2028 uint64_t __user *prop_values; 2029 uint32_t __user *encoder_ptr; 2030 2031 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2032 return -EINVAL; 2033 2034 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2035 2036 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 2037 2038 mutex_lock(&dev->mode_config.mutex); 2039 2040 connector = drm_connector_find(dev, out_resp->connector_id); 2041 if (!connector) { 2042 ret = -ENOENT; 2043 goto out; 2044 } 2045 2046 props_count = connector->properties.count; 2047 2048 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2049 if (connector->encoder_ids[i] != 0) { 2050 encoders_count++; 2051 } 2052 } 2053 2054 if (out_resp->count_modes == 0) { 2055 connector->funcs->fill_modes(connector, 2056 dev->mode_config.max_width, 2057 dev->mode_config.max_height); 2058 } 2059 2060 /* delayed so we get modes regardless of pre-fill_modes state */ 2061 list_for_each_entry(mode, &connector->modes, head) 2062 if (drm_mode_expose_to_userspace(mode, file_priv)) 2063 mode_count++; 2064 2065 out_resp->connector_id = connector->base.id; 2066 out_resp->connector_type = connector->connector_type; 2067 out_resp->connector_type_id = connector->connector_type_id; 2068 out_resp->mm_width = connector->display_info.width_mm; 2069 out_resp->mm_height = connector->display_info.height_mm; 2070 out_resp->subpixel = connector->display_info.subpixel_order; 2071 out_resp->connection = connector->status; 2072 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2073 2074 encoder = drm_connector_get_encoder(connector); 2075 if (encoder) 2076 out_resp->encoder_id = encoder->base.id; 2077 else 2078 out_resp->encoder_id = 0; 2079 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2080 2081 /* 2082 * This ioctl is called twice, once to determine how much space is 2083 * needed, and the 2nd time to fill it. 2084 */ 2085 if ((out_resp->count_modes >= mode_count) && mode_count) { 2086 copied = 0; 2087 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2088 list_for_each_entry(mode, &connector->modes, head) { 2089 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2090 continue; 2091 2092 drm_crtc_convert_to_umode(&u_mode, mode); 2093 if (copy_to_user(mode_ptr + copied, 2094 &u_mode, sizeof(u_mode))) { 2095 ret = -EFAULT; 2096 goto out; 2097 } 2098 copied++; 2099 } 2100 } 2101 out_resp->count_modes = mode_count; 2102 2103 if ((out_resp->count_props >= props_count) && props_count) { 2104 copied = 0; 2105 prop_ptr = (uint32_t __user *)(unsigned long)(out_resp->props_ptr); 2106 prop_values = (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr); 2107 for (i = 0; i < connector->properties.count; i++) { 2108 if (put_user(connector->properties.ids[i], 2109 prop_ptr + copied)) { 2110 ret = -EFAULT; 2111 goto out; 2112 } 2113 2114 if (put_user(connector->properties.values[i], 2115 prop_values + copied)) { 2116 ret = -EFAULT; 2117 goto out; 2118 } 2119 copied++; 2120 } 2121 } 2122 out_resp->count_props = props_count; 2123 2124 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2125 copied = 0; 2126 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2127 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2128 if (connector->encoder_ids[i] != 0) { 2129 if (put_user(connector->encoder_ids[i], 2130 encoder_ptr + copied)) { 2131 ret = -EFAULT; 2132 goto out; 2133 } 2134 copied++; 2135 } 2136 } 2137 } 2138 out_resp->count_encoders = encoders_count; 2139 2140 out: 2141 mutex_unlock(&dev->mode_config.mutex); 2142 2143 return ret; 2144 } 2145 2146 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2147 { 2148 struct drm_connector *connector; 2149 struct drm_device *dev = encoder->dev; 2150 bool uses_atomic = false; 2151 2152 /* For atomic drivers only state objects are synchronously updated and 2153 * protected by modeset locks, so check those first. */ 2154 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 2155 if (!connector->state) 2156 continue; 2157 2158 uses_atomic = true; 2159 2160 if (connector->state->best_encoder != encoder) 2161 continue; 2162 2163 return connector->state->crtc; 2164 } 2165 2166 /* Don't return stale data (e.g. pending async disable). */ 2167 if (uses_atomic) 2168 return NULL; 2169 2170 return encoder->crtc; 2171 } 2172 2173 /** 2174 * drm_mode_getencoder - get encoder configuration 2175 * @dev: drm device for the ioctl 2176 * @data: data pointer for the ioctl 2177 * @file_priv: drm file for the ioctl call 2178 * 2179 * Construct a encoder configuration structure to return to the user. 2180 * 2181 * Called by the user via ioctl. 2182 * 2183 * Returns: 2184 * Zero on success, negative errno on failure. 2185 */ 2186 int drm_mode_getencoder(struct drm_device *dev, void *data, 2187 struct drm_file *file_priv) 2188 { 2189 struct drm_mode_get_encoder *enc_resp = data; 2190 struct drm_encoder *encoder; 2191 struct drm_crtc *crtc; 2192 2193 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2194 return -EINVAL; 2195 2196 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2197 if (!encoder) 2198 return -ENOENT; 2199 2200 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2201 crtc = drm_encoder_get_crtc(encoder); 2202 if (crtc) 2203 enc_resp->crtc_id = crtc->base.id; 2204 else if (encoder->crtc) 2205 enc_resp->crtc_id = encoder->crtc->base.id; 2206 else 2207 enc_resp->crtc_id = 0; 2208 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2209 2210 enc_resp->encoder_type = encoder->encoder_type; 2211 enc_resp->encoder_id = encoder->base.id; 2212 enc_resp->possible_crtcs = encoder->possible_crtcs; 2213 enc_resp->possible_clones = encoder->possible_clones; 2214 2215 return 0; 2216 } 2217 2218 /** 2219 * drm_mode_getplane_res - enumerate all plane resources 2220 * @dev: DRM device 2221 * @data: ioctl data 2222 * @file_priv: DRM file info 2223 * 2224 * Construct a list of plane ids to return to the user. 2225 * 2226 * Called by the user via ioctl. 2227 * 2228 * Returns: 2229 * Zero on success, negative errno on failure. 2230 */ 2231 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2232 struct drm_file *file_priv) 2233 { 2234 struct drm_mode_get_plane_res *plane_resp = data; 2235 struct drm_mode_config *config; 2236 struct drm_plane *plane; 2237 uint32_t __user *plane_ptr; 2238 int copied = 0; 2239 unsigned num_planes; 2240 2241 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2242 return -EINVAL; 2243 2244 config = &dev->mode_config; 2245 2246 if (file_priv->universal_planes) 2247 num_planes = config->num_total_plane; 2248 else 2249 num_planes = config->num_overlay_plane; 2250 2251 /* 2252 * This ioctl is called twice, once to determine how much space is 2253 * needed, and the 2nd time to fill it. 2254 */ 2255 if (num_planes && 2256 (plane_resp->count_planes >= num_planes)) { 2257 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2258 2259 /* Plane lists are invariant, no locking needed. */ 2260 list_for_each_entry(plane, &config->plane_list, head) { 2261 /* 2262 * Unless userspace set the 'universal planes' 2263 * capability bit, only advertise overlays. 2264 */ 2265 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2266 !file_priv->universal_planes) 2267 continue; 2268 2269 if (put_user(plane->base.id, plane_ptr + copied)) 2270 return -EFAULT; 2271 copied++; 2272 } 2273 } 2274 plane_resp->count_planes = num_planes; 2275 2276 return 0; 2277 } 2278 2279 /** 2280 * drm_mode_getplane - get plane configuration 2281 * @dev: DRM device 2282 * @data: ioctl data 2283 * @file_priv: DRM file info 2284 * 2285 * Construct a plane configuration structure to return to the user. 2286 * 2287 * Called by the user via ioctl. 2288 * 2289 * Returns: 2290 * Zero on success, negative errno on failure. 2291 */ 2292 int drm_mode_getplane(struct drm_device *dev, void *data, 2293 struct drm_file *file_priv) 2294 { 2295 struct drm_mode_get_plane *plane_resp = data; 2296 struct drm_plane *plane; 2297 uint32_t __user *format_ptr; 2298 2299 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2300 return -EINVAL; 2301 2302 plane = drm_plane_find(dev, plane_resp->plane_id); 2303 if (!plane) 2304 return -ENOENT; 2305 2306 drm_modeset_lock(&plane->mutex, NULL); 2307 if (plane->crtc) 2308 plane_resp->crtc_id = plane->crtc->base.id; 2309 else 2310 plane_resp->crtc_id = 0; 2311 2312 if (plane->fb) 2313 plane_resp->fb_id = plane->fb->base.id; 2314 else 2315 plane_resp->fb_id = 0; 2316 drm_modeset_unlock(&plane->mutex); 2317 2318 plane_resp->plane_id = plane->base.id; 2319 plane_resp->possible_crtcs = plane->possible_crtcs; 2320 plane_resp->gamma_size = 0; 2321 2322 /* 2323 * This ioctl is called twice, once to determine how much space is 2324 * needed, and the 2nd time to fill it. 2325 */ 2326 if (plane->format_count && 2327 (plane_resp->count_format_types >= plane->format_count)) { 2328 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2329 if (copy_to_user(format_ptr, 2330 plane->format_types, 2331 sizeof(uint32_t) * plane->format_count)) { 2332 return -EFAULT; 2333 } 2334 } 2335 plane_resp->count_format_types = plane->format_count; 2336 2337 return 0; 2338 } 2339 2340 /* 2341 * setplane_internal - setplane handler for internal callers 2342 * 2343 * Note that we assume an extra reference has already been taken on fb. If the 2344 * update fails, this reference will be dropped before return; if it succeeds, 2345 * the previous framebuffer (if any) will be unreferenced instead. 2346 * 2347 * src_{x,y,w,h} are provided in 16.16 fixed point format 2348 */ 2349 static int __setplane_internal(struct drm_plane *plane, 2350 struct drm_crtc *crtc, 2351 struct drm_framebuffer *fb, 2352 int32_t crtc_x, int32_t crtc_y, 2353 uint32_t crtc_w, uint32_t crtc_h, 2354 /* src_{x,y,w,h} values are 16.16 fixed point */ 2355 uint32_t src_x, uint32_t src_y, 2356 uint32_t src_w, uint32_t src_h) 2357 { 2358 int ret = 0; 2359 unsigned int fb_width, fb_height; 2360 unsigned int i; 2361 2362 /* No fb means shut it down */ 2363 if (!fb) { 2364 plane->old_fb = plane->fb; 2365 ret = plane->funcs->disable_plane(plane); 2366 if (!ret) { 2367 plane->crtc = NULL; 2368 plane->fb = NULL; 2369 } else { 2370 plane->old_fb = NULL; 2371 } 2372 goto out; 2373 } 2374 2375 /* Check whether this plane is usable on this CRTC */ 2376 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2377 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2378 ret = -EINVAL; 2379 goto out; 2380 } 2381 2382 /* Check whether this plane supports the fb pixel format. */ 2383 for (i = 0; i < plane->format_count; i++) 2384 if (fb->pixel_format == plane->format_types[i]) 2385 break; 2386 if (i == plane->format_count) { 2387 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2388 drm_get_format_name(fb->pixel_format)); 2389 ret = -EINVAL; 2390 goto out; 2391 } 2392 2393 fb_width = fb->width << 16; 2394 fb_height = fb->height << 16; 2395 2396 /* Make sure source coordinates are inside the fb. */ 2397 if (src_w > fb_width || 2398 src_x > fb_width - src_w || 2399 src_h > fb_height || 2400 src_y > fb_height - src_h) { 2401 DRM_DEBUG_KMS("Invalid source coordinates " 2402 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2403 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2404 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2405 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2406 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2407 ret = -ENOSPC; 2408 goto out; 2409 } 2410 2411 plane->old_fb = plane->fb; 2412 ret = plane->funcs->update_plane(plane, crtc, fb, 2413 crtc_x, crtc_y, crtc_w, crtc_h, 2414 src_x, src_y, src_w, src_h); 2415 if (!ret) { 2416 plane->crtc = crtc; 2417 plane->fb = fb; 2418 fb = NULL; 2419 } else { 2420 plane->old_fb = NULL; 2421 } 2422 2423 out: 2424 if (fb) 2425 drm_framebuffer_unreference(fb); 2426 if (plane->old_fb) 2427 drm_framebuffer_unreference(plane->old_fb); 2428 plane->old_fb = NULL; 2429 2430 return ret; 2431 } 2432 2433 static int setplane_internal(struct drm_plane *plane, 2434 struct drm_crtc *crtc, 2435 struct drm_framebuffer *fb, 2436 int32_t crtc_x, int32_t crtc_y, 2437 uint32_t crtc_w, uint32_t crtc_h, 2438 /* src_{x,y,w,h} values are 16.16 fixed point */ 2439 uint32_t src_x, uint32_t src_y, 2440 uint32_t src_w, uint32_t src_h) 2441 { 2442 int ret; 2443 2444 drm_modeset_lock_all(plane->dev); 2445 ret = __setplane_internal(plane, crtc, fb, 2446 crtc_x, crtc_y, crtc_w, crtc_h, 2447 src_x, src_y, src_w, src_h); 2448 drm_modeset_unlock_all(plane->dev); 2449 2450 return ret; 2451 } 2452 2453 /** 2454 * drm_mode_setplane - configure a plane's configuration 2455 * @dev: DRM device 2456 * @data: ioctl data* 2457 * @file_priv: DRM file info 2458 * 2459 * Set plane configuration, including placement, fb, scaling, and other factors. 2460 * Or pass a NULL fb to disable (planes may be disabled without providing a 2461 * valid crtc). 2462 * 2463 * Returns: 2464 * Zero on success, negative errno on failure. 2465 */ 2466 int drm_mode_setplane(struct drm_device *dev, void *data, 2467 struct drm_file *file_priv) 2468 { 2469 struct drm_mode_set_plane *plane_req = data; 2470 struct drm_plane *plane; 2471 struct drm_crtc *crtc = NULL; 2472 struct drm_framebuffer *fb = NULL; 2473 2474 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2475 return -EINVAL; 2476 2477 /* Give drivers some help against integer overflows */ 2478 if (plane_req->crtc_w > INT_MAX || 2479 plane_req->crtc_x > INT_MAX - (int32_t) plane_req->crtc_w || 2480 plane_req->crtc_h > INT_MAX || 2481 plane_req->crtc_y > INT_MAX - (int32_t) plane_req->crtc_h) { 2482 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2483 plane_req->crtc_w, plane_req->crtc_h, 2484 plane_req->crtc_x, plane_req->crtc_y); 2485 return -ERANGE; 2486 } 2487 2488 /* 2489 * First, find the plane, crtc, and fb objects. If not available, 2490 * we don't bother to call the driver. 2491 */ 2492 plane = drm_plane_find(dev, plane_req->plane_id); 2493 if (!plane) { 2494 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2495 plane_req->plane_id); 2496 return -ENOENT; 2497 } 2498 2499 if (plane_req->fb_id) { 2500 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2501 if (!fb) { 2502 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2503 plane_req->fb_id); 2504 return -ENOENT; 2505 } 2506 2507 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2508 if (!crtc) { 2509 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2510 plane_req->crtc_id); 2511 return -ENOENT; 2512 } 2513 } 2514 2515 /* 2516 * setplane_internal will take care of deref'ing either the old or new 2517 * framebuffer depending on success. 2518 */ 2519 return setplane_internal(plane, crtc, fb, 2520 plane_req->crtc_x, plane_req->crtc_y, 2521 plane_req->crtc_w, plane_req->crtc_h, 2522 plane_req->src_x, plane_req->src_y, 2523 plane_req->src_w, plane_req->src_h); 2524 } 2525 2526 /** 2527 * drm_mode_set_config_internal - helper to call ->set_config 2528 * @set: modeset config to set 2529 * 2530 * This is a little helper to wrap internal calls to the ->set_config driver 2531 * interface. The only thing it adds is correct refcounting dance. 2532 * 2533 * Returns: 2534 * Zero on success, negative errno on failure. 2535 */ 2536 int drm_mode_set_config_internal(struct drm_mode_set *set) 2537 { 2538 struct drm_crtc *crtc = set->crtc; 2539 struct drm_framebuffer *fb; 2540 struct drm_crtc *tmp; 2541 int ret; 2542 2543 /* 2544 * NOTE: ->set_config can also disable other crtcs (if we steal all 2545 * connectors from it), hence we need to refcount the fbs across all 2546 * crtcs. Atomic modeset will have saner semantics ... 2547 */ 2548 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) 2549 tmp->primary->old_fb = tmp->primary->fb; 2550 2551 fb = set->fb; 2552 2553 ret = crtc->funcs->set_config(set); 2554 if (ret == 0) { 2555 crtc->primary->crtc = crtc; 2556 crtc->primary->fb = fb; 2557 } 2558 2559 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { 2560 if (tmp->primary->fb) 2561 drm_framebuffer_reference(tmp->primary->fb); 2562 if (tmp->primary->old_fb) 2563 drm_framebuffer_unreference(tmp->primary->old_fb); 2564 tmp->primary->old_fb = NULL; 2565 } 2566 2567 return ret; 2568 } 2569 EXPORT_SYMBOL(drm_mode_set_config_internal); 2570 2571 /** 2572 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2573 * CRTC viewport 2574 * @crtc: CRTC that framebuffer will be displayed on 2575 * @x: x panning 2576 * @y: y panning 2577 * @mode: mode that framebuffer will be displayed under 2578 * @fb: framebuffer to check size of 2579 */ 2580 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2581 int x, int y, 2582 const struct drm_display_mode *mode, 2583 const struct drm_framebuffer *fb) 2584 2585 { 2586 int hdisplay, vdisplay; 2587 2588 hdisplay = mode->hdisplay; 2589 vdisplay = mode->vdisplay; 2590 2591 if (drm_mode_is_stereo(mode)) { 2592 struct drm_display_mode adjusted = *mode; 2593 2594 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE); 2595 hdisplay = adjusted.crtc_hdisplay; 2596 vdisplay = adjusted.crtc_vdisplay; 2597 } 2598 2599 if (crtc->invert_dimensions) 2600 swap(hdisplay, vdisplay); 2601 2602 if (hdisplay > fb->width || 2603 vdisplay > fb->height || 2604 x > fb->width - hdisplay || 2605 y > fb->height - vdisplay) { 2606 DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n", 2607 fb->width, fb->height, hdisplay, vdisplay, x, y, 2608 crtc->invert_dimensions ? " (inverted)" : ""); 2609 return -ENOSPC; 2610 } 2611 2612 return 0; 2613 } 2614 EXPORT_SYMBOL(drm_crtc_check_viewport); 2615 2616 /** 2617 * drm_mode_setcrtc - set CRTC configuration 2618 * @dev: drm device for the ioctl 2619 * @data: data pointer for the ioctl 2620 * @file_priv: drm file for the ioctl call 2621 * 2622 * Build a new CRTC configuration based on user request. 2623 * 2624 * Called by the user via ioctl. 2625 * 2626 * Returns: 2627 * Zero on success, negative errno on failure. 2628 */ 2629 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2630 struct drm_file *file_priv) 2631 { 2632 struct drm_mode_config *config = &dev->mode_config; 2633 struct drm_mode_crtc *crtc_req = data; 2634 struct drm_crtc *crtc; 2635 struct drm_connector **connector_set = NULL, *connector; 2636 struct drm_framebuffer *fb = NULL; 2637 struct drm_display_mode *mode = NULL; 2638 struct drm_mode_set set; 2639 uint32_t __user *set_connectors_ptr; 2640 int ret; 2641 int i; 2642 2643 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2644 return -EINVAL; 2645 2646 /* For some reason crtc x/y offsets are signed internally. */ 2647 if (crtc_req->x > INT_MAX || crtc_req->y > INT_MAX) 2648 return -ERANGE; 2649 2650 drm_modeset_lock_all(dev); 2651 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2652 if (!crtc) { 2653 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2654 ret = -ENOENT; 2655 goto out; 2656 } 2657 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 2658 2659 if (crtc_req->mode_valid) { 2660 /* If we have a mode we need a framebuffer. */ 2661 /* If we pass -1, set the mode with the currently bound fb */ 2662 if (crtc_req->fb_id == -1) { 2663 if (!crtc->primary->fb) { 2664 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2665 ret = -EINVAL; 2666 goto out; 2667 } 2668 fb = crtc->primary->fb; 2669 /* Make refcounting symmetric with the lookup path. */ 2670 drm_framebuffer_reference(fb); 2671 } else { 2672 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2673 if (!fb) { 2674 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2675 crtc_req->fb_id); 2676 ret = -ENOENT; 2677 goto out; 2678 } 2679 } 2680 2681 mode = drm_mode_create(dev); 2682 if (!mode) { 2683 ret = -ENOMEM; 2684 goto out; 2685 } 2686 2687 ret = drm_crtc_convert_umode(mode, &crtc_req->mode); 2688 if (ret) { 2689 DRM_DEBUG_KMS("Invalid mode\n"); 2690 goto out; 2691 } 2692 2693 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 2694 2695 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2696 mode, fb); 2697 if (ret) 2698 goto out; 2699 2700 } 2701 2702 if (crtc_req->count_connectors == 0 && mode) { 2703 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2704 ret = -EINVAL; 2705 goto out; 2706 } 2707 2708 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2709 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2710 crtc_req->count_connectors); 2711 ret = -EINVAL; 2712 goto out; 2713 } 2714 2715 if (crtc_req->count_connectors > 0) { 2716 u32 out_id; 2717 2718 /* Avoid unbounded kernel memory allocation */ 2719 if (crtc_req->count_connectors > config->num_connector) { 2720 ret = -EINVAL; 2721 goto out; 2722 } 2723 2724 connector_set = kmalloc(crtc_req->count_connectors * 2725 sizeof(struct drm_connector *), 2726 GFP_KERNEL); 2727 if (!connector_set) { 2728 ret = -ENOMEM; 2729 goto out; 2730 } 2731 2732 for (i = 0; i < crtc_req->count_connectors; i++) { 2733 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2734 if (get_user(out_id, &set_connectors_ptr[i])) { 2735 ret = -EFAULT; 2736 goto out; 2737 } 2738 2739 connector = drm_connector_find(dev, out_id); 2740 if (!connector) { 2741 DRM_DEBUG_KMS("Connector id %d unknown\n", 2742 out_id); 2743 ret = -ENOENT; 2744 goto out; 2745 } 2746 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2747 connector->base.id, 2748 connector->name); 2749 2750 connector_set[i] = connector; 2751 } 2752 } 2753 2754 set.crtc = crtc; 2755 set.x = crtc_req->x; 2756 set.y = crtc_req->y; 2757 set.mode = mode; 2758 set.connectors = connector_set; 2759 set.num_connectors = crtc_req->count_connectors; 2760 set.fb = fb; 2761 ret = drm_mode_set_config_internal(&set); 2762 2763 out: 2764 if (fb) 2765 drm_framebuffer_unreference(fb); 2766 2767 kfree(connector_set); 2768 drm_mode_destroy(dev, mode); 2769 drm_modeset_unlock_all(dev); 2770 return ret; 2771 } 2772 2773 /** 2774 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2775 * universal plane handler call 2776 * @crtc: crtc to update cursor for 2777 * @req: data pointer for the ioctl 2778 * @file_priv: drm file for the ioctl call 2779 * 2780 * Legacy cursor ioctl's work directly with driver buffer handles. To 2781 * translate legacy ioctl calls into universal plane handler calls, we need to 2782 * wrap the native buffer handle in a drm_framebuffer. 2783 * 2784 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2785 * buffer with a pitch of 4*width; the universal plane interface should be used 2786 * directly in cases where the hardware can support other buffer settings and 2787 * userspace wants to make use of these capabilities. 2788 * 2789 * Returns: 2790 * Zero on success, negative errno on failure. 2791 */ 2792 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2793 struct drm_mode_cursor2 *req, 2794 struct drm_file *file_priv) 2795 { 2796 struct drm_device *dev = crtc->dev; 2797 struct drm_framebuffer *fb = NULL; 2798 struct drm_mode_fb_cmd2 fbreq = { 2799 .width = req->width, 2800 .height = req->height, 2801 .pixel_format = DRM_FORMAT_ARGB8888, 2802 .pitches = { req->width * 4 }, 2803 .handles = { req->handle }, 2804 }; 2805 int32_t crtc_x, crtc_y; 2806 uint32_t crtc_w = 0, crtc_h = 0; 2807 uint32_t src_w = 0, src_h = 0; 2808 int ret = 0; 2809 2810 BUG_ON(!crtc->cursor); 2811 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2812 2813 /* 2814 * Obtain fb we'll be using (either new or existing) and take an extra 2815 * reference to it if fb != null. setplane will take care of dropping 2816 * the reference if the plane update fails. 2817 */ 2818 if (req->flags & DRM_MODE_CURSOR_BO) { 2819 if (req->handle) { 2820 fb = add_framebuffer_internal(dev, &fbreq, file_priv); 2821 if (IS_ERR(fb)) { 2822 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2823 return PTR_ERR(fb); 2824 } 2825 2826 drm_framebuffer_reference(fb); 2827 } else { 2828 fb = NULL; 2829 } 2830 } else { 2831 fb = crtc->cursor->fb; 2832 if (fb) 2833 drm_framebuffer_reference(fb); 2834 } 2835 2836 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2837 crtc_x = req->x; 2838 crtc_y = req->y; 2839 } else { 2840 crtc_x = crtc->cursor_x; 2841 crtc_y = crtc->cursor_y; 2842 } 2843 2844 if (fb) { 2845 crtc_w = fb->width; 2846 crtc_h = fb->height; 2847 src_w = fb->width << 16; 2848 src_h = fb->height << 16; 2849 } 2850 2851 /* 2852 * setplane_internal will take care of deref'ing either the old or new 2853 * framebuffer depending on success. 2854 */ 2855 ret = __setplane_internal(crtc->cursor, crtc, fb, 2856 crtc_x, crtc_y, crtc_w, crtc_h, 2857 0, 0, src_w, src_h); 2858 2859 /* Update successful; save new cursor position, if necessary */ 2860 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2861 crtc->cursor_x = req->x; 2862 crtc->cursor_y = req->y; 2863 } 2864 2865 return ret; 2866 } 2867 2868 static int drm_mode_cursor_common(struct drm_device *dev, 2869 struct drm_mode_cursor2 *req, 2870 struct drm_file *file_priv) 2871 { 2872 struct drm_crtc *crtc; 2873 int ret = 0; 2874 2875 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2876 return -EINVAL; 2877 2878 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 2879 return -EINVAL; 2880 2881 crtc = drm_crtc_find(dev, req->crtc_id); 2882 if (!crtc) { 2883 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 2884 return -ENOENT; 2885 } 2886 2887 /* 2888 * If this crtc has a universal cursor plane, call that plane's update 2889 * handler rather than using legacy cursor handlers. 2890 */ 2891 drm_modeset_lock_crtc(crtc, crtc->cursor); 2892 if (crtc->cursor) { 2893 ret = drm_mode_cursor_universal(crtc, req, file_priv); 2894 goto out; 2895 } 2896 2897 if (req->flags & DRM_MODE_CURSOR_BO) { 2898 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 2899 ret = -ENXIO; 2900 goto out; 2901 } 2902 /* Turns off the cursor if handle is 0 */ 2903 if (crtc->funcs->cursor_set2) 2904 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 2905 req->width, req->height, req->hot_x, req->hot_y); 2906 else 2907 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 2908 req->width, req->height); 2909 } 2910 2911 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2912 if (crtc->funcs->cursor_move) { 2913 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 2914 } else { 2915 ret = -EFAULT; 2916 goto out; 2917 } 2918 } 2919 out: 2920 drm_modeset_unlock_crtc(crtc); 2921 2922 return ret; 2923 2924 } 2925 2926 2927 /** 2928 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 2929 * @dev: drm device for the ioctl 2930 * @data: data pointer for the ioctl 2931 * @file_priv: drm file for the ioctl call 2932 * 2933 * Set the cursor configuration based on user request. 2934 * 2935 * Called by the user via ioctl. 2936 * 2937 * Returns: 2938 * Zero on success, negative errno on failure. 2939 */ 2940 int drm_mode_cursor_ioctl(struct drm_device *dev, 2941 void *data, struct drm_file *file_priv) 2942 { 2943 struct drm_mode_cursor *req = data; 2944 struct drm_mode_cursor2 new_req; 2945 2946 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 2947 new_req.hot_x = new_req.hot_y = 0; 2948 2949 return drm_mode_cursor_common(dev, &new_req, file_priv); 2950 } 2951 2952 /** 2953 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 2954 * @dev: drm device for the ioctl 2955 * @data: data pointer for the ioctl 2956 * @file_priv: drm file for the ioctl call 2957 * 2958 * Set the cursor configuration based on user request. This implements the 2nd 2959 * version of the cursor ioctl, which allows userspace to additionally specify 2960 * the hotspot of the pointer. 2961 * 2962 * Called by the user via ioctl. 2963 * 2964 * Returns: 2965 * Zero on success, negative errno on failure. 2966 */ 2967 int drm_mode_cursor2_ioctl(struct drm_device *dev, 2968 void *data, struct drm_file *file_priv) 2969 { 2970 struct drm_mode_cursor2 *req = data; 2971 return drm_mode_cursor_common(dev, req, file_priv); 2972 } 2973 2974 /** 2975 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 2976 * @bpp: bits per pixels 2977 * @depth: bit depth per pixel 2978 * 2979 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 2980 * Useful in fbdev emulation code, since that deals in those values. 2981 */ 2982 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 2983 { 2984 uint32_t fmt; 2985 2986 switch (bpp) { 2987 case 8: 2988 fmt = DRM_FORMAT_C8; 2989 break; 2990 case 16: 2991 if (depth == 15) 2992 fmt = DRM_FORMAT_XRGB1555; 2993 else 2994 fmt = DRM_FORMAT_RGB565; 2995 break; 2996 case 24: 2997 fmt = DRM_FORMAT_RGB888; 2998 break; 2999 case 32: 3000 if (depth == 24) 3001 fmt = DRM_FORMAT_XRGB8888; 3002 else if (depth == 30) 3003 fmt = DRM_FORMAT_XRGB2101010; 3004 else 3005 fmt = DRM_FORMAT_ARGB8888; 3006 break; 3007 default: 3008 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3009 fmt = DRM_FORMAT_XRGB8888; 3010 break; 3011 } 3012 3013 return fmt; 3014 } 3015 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3016 3017 /** 3018 * drm_mode_addfb - add an FB to the graphics configuration 3019 * @dev: drm device for the ioctl 3020 * @data: data pointer for the ioctl 3021 * @file_priv: drm file for the ioctl call 3022 * 3023 * Add a new FB to the specified CRTC, given a user request. This is the 3024 * original addfb ioctl which only supported RGB formats. 3025 * 3026 * Called by the user via ioctl. 3027 * 3028 * Returns: 3029 * Zero on success, negative errno on failure. 3030 */ 3031 int drm_mode_addfb(struct drm_device *dev, 3032 void *data, struct drm_file *file_priv) 3033 { 3034 struct drm_mode_fb_cmd *or = data; 3035 struct drm_mode_fb_cmd2 r = {}; 3036 int ret; 3037 3038 /* convert to new format and call new ioctl */ 3039 r.fb_id = or->fb_id; 3040 r.width = or->width; 3041 r.height = or->height; 3042 r.pitches[0] = or->pitch; 3043 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3044 r.handles[0] = or->handle; 3045 3046 ret = drm_mode_addfb2(dev, &r, file_priv); 3047 if (ret) 3048 return ret; 3049 3050 or->fb_id = r.fb_id; 3051 3052 return 0; 3053 } 3054 3055 static int format_check(const struct drm_mode_fb_cmd2 *r) 3056 { 3057 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3058 3059 switch (format) { 3060 case DRM_FORMAT_C8: 3061 case DRM_FORMAT_RGB332: 3062 case DRM_FORMAT_BGR233: 3063 case DRM_FORMAT_XRGB4444: 3064 case DRM_FORMAT_XBGR4444: 3065 case DRM_FORMAT_RGBX4444: 3066 case DRM_FORMAT_BGRX4444: 3067 case DRM_FORMAT_ARGB4444: 3068 case DRM_FORMAT_ABGR4444: 3069 case DRM_FORMAT_RGBA4444: 3070 case DRM_FORMAT_BGRA4444: 3071 case DRM_FORMAT_XRGB1555: 3072 case DRM_FORMAT_XBGR1555: 3073 case DRM_FORMAT_RGBX5551: 3074 case DRM_FORMAT_BGRX5551: 3075 case DRM_FORMAT_ARGB1555: 3076 case DRM_FORMAT_ABGR1555: 3077 case DRM_FORMAT_RGBA5551: 3078 case DRM_FORMAT_BGRA5551: 3079 case DRM_FORMAT_RGB565: 3080 case DRM_FORMAT_BGR565: 3081 case DRM_FORMAT_RGB888: 3082 case DRM_FORMAT_BGR888: 3083 case DRM_FORMAT_XRGB8888: 3084 case DRM_FORMAT_XBGR8888: 3085 case DRM_FORMAT_RGBX8888: 3086 case DRM_FORMAT_BGRX8888: 3087 case DRM_FORMAT_ARGB8888: 3088 case DRM_FORMAT_ABGR8888: 3089 case DRM_FORMAT_RGBA8888: 3090 case DRM_FORMAT_BGRA8888: 3091 case DRM_FORMAT_XRGB2101010: 3092 case DRM_FORMAT_XBGR2101010: 3093 case DRM_FORMAT_RGBX1010102: 3094 case DRM_FORMAT_BGRX1010102: 3095 case DRM_FORMAT_ARGB2101010: 3096 case DRM_FORMAT_ABGR2101010: 3097 case DRM_FORMAT_RGBA1010102: 3098 case DRM_FORMAT_BGRA1010102: 3099 case DRM_FORMAT_YUYV: 3100 case DRM_FORMAT_YVYU: 3101 case DRM_FORMAT_UYVY: 3102 case DRM_FORMAT_VYUY: 3103 case DRM_FORMAT_AYUV: 3104 case DRM_FORMAT_NV12: 3105 case DRM_FORMAT_NV21: 3106 case DRM_FORMAT_NV16: 3107 case DRM_FORMAT_NV61: 3108 case DRM_FORMAT_NV24: 3109 case DRM_FORMAT_NV42: 3110 case DRM_FORMAT_YUV410: 3111 case DRM_FORMAT_YVU410: 3112 case DRM_FORMAT_YUV411: 3113 case DRM_FORMAT_YVU411: 3114 case DRM_FORMAT_YUV420: 3115 case DRM_FORMAT_YVU420: 3116 case DRM_FORMAT_YUV422: 3117 case DRM_FORMAT_YVU422: 3118 case DRM_FORMAT_YUV444: 3119 case DRM_FORMAT_YVU444: 3120 return 0; 3121 default: 3122 DRM_DEBUG_KMS("invalid pixel format %s\n", 3123 drm_get_format_name(r->pixel_format)); 3124 return -EINVAL; 3125 } 3126 } 3127 3128 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3129 { 3130 int ret, hsub, vsub, num_planes, i; 3131 3132 ret = format_check(r); 3133 if (ret) { 3134 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3135 drm_get_format_name(r->pixel_format)); 3136 return ret; 3137 } 3138 3139 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3140 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3141 num_planes = drm_format_num_planes(r->pixel_format); 3142 3143 if (r->width == 0 || r->width % hsub) { 3144 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3145 return -EINVAL; 3146 } 3147 3148 if (r->height == 0 || r->height % vsub) { 3149 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3150 return -EINVAL; 3151 } 3152 3153 for (i = 0; i < num_planes; i++) { 3154 unsigned int width = r->width / (i != 0 ? hsub : 1); 3155 unsigned int height = r->height / (i != 0 ? vsub : 1); 3156 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3157 3158 if (!r->handles[i]) { 3159 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3160 return -EINVAL; 3161 } 3162 3163 if ((uint64_t) width * cpp > UINT_MAX) 3164 return -ERANGE; 3165 3166 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3167 return -ERANGE; 3168 3169 if (r->pitches[i] < width * cpp) { 3170 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3171 return -EINVAL; 3172 } 3173 } 3174 3175 return 0; 3176 } 3177 3178 static struct drm_framebuffer *add_framebuffer_internal(struct drm_device *dev, 3179 struct drm_mode_fb_cmd2 *r, 3180 struct drm_file *file_priv) 3181 { 3182 struct drm_mode_config *config = &dev->mode_config; 3183 struct drm_framebuffer *fb; 3184 int ret; 3185 3186 if (r->flags & ~DRM_MODE_FB_INTERLACED) { 3187 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3188 return ERR_PTR(-EINVAL); 3189 } 3190 3191 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3192 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3193 r->width, config->min_width, config->max_width); 3194 return ERR_PTR(-EINVAL); 3195 } 3196 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3197 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3198 r->height, config->min_height, config->max_height); 3199 return ERR_PTR(-EINVAL); 3200 } 3201 3202 ret = framebuffer_check(r); 3203 if (ret) 3204 return ERR_PTR(ret); 3205 3206 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3207 if (IS_ERR(fb)) { 3208 DRM_DEBUG_KMS("could not create framebuffer\n"); 3209 return fb; 3210 } 3211 3212 mutex_lock(&file_priv->fbs_lock); 3213 r->fb_id = fb->base.id; 3214 list_add(&fb->filp_head, &file_priv->fbs); 3215 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3216 mutex_unlock(&file_priv->fbs_lock); 3217 3218 return fb; 3219 } 3220 3221 /** 3222 * drm_mode_addfb2 - add an FB to the graphics configuration 3223 * @dev: drm device for the ioctl 3224 * @data: data pointer for the ioctl 3225 * @file_priv: drm file for the ioctl call 3226 * 3227 * Add a new FB to the specified CRTC, given a user request with format. This is 3228 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3229 * and uses fourcc codes as pixel format specifiers. 3230 * 3231 * Called by the user via ioctl. 3232 * 3233 * Returns: 3234 * Zero on success, negative errno on failure. 3235 */ 3236 int drm_mode_addfb2(struct drm_device *dev, 3237 void *data, struct drm_file *file_priv) 3238 { 3239 struct drm_framebuffer *fb; 3240 3241 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3242 return -EINVAL; 3243 3244 fb = add_framebuffer_internal(dev, data, file_priv); 3245 if (IS_ERR(fb)) 3246 return PTR_ERR(fb); 3247 3248 return 0; 3249 } 3250 3251 /** 3252 * drm_mode_rmfb - remove an FB from the configuration 3253 * @dev: drm device for the ioctl 3254 * @data: data pointer for the ioctl 3255 * @file_priv: drm file for the ioctl call 3256 * 3257 * Remove the FB specified by the user. 3258 * 3259 * Called by the user via ioctl. 3260 * 3261 * Returns: 3262 * Zero on success, negative errno on failure. 3263 */ 3264 int drm_mode_rmfb(struct drm_device *dev, 3265 void *data, struct drm_file *file_priv) 3266 { 3267 struct drm_framebuffer *fb = NULL; 3268 struct drm_framebuffer *fbl = NULL; 3269 uint32_t *id = data; 3270 int found = 0; 3271 3272 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3273 return -EINVAL; 3274 3275 mutex_lock(&file_priv->fbs_lock); 3276 mutex_lock(&dev->mode_config.fb_lock); 3277 fb = __drm_framebuffer_lookup(dev, *id); 3278 if (!fb) 3279 goto fail_lookup; 3280 3281 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3282 if (fb == fbl) 3283 found = 1; 3284 if (!found) 3285 goto fail_lookup; 3286 3287 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ 3288 __drm_framebuffer_unregister(dev, fb); 3289 3290 list_del_init(&fb->filp_head); 3291 mutex_unlock(&dev->mode_config.fb_lock); 3292 mutex_unlock(&file_priv->fbs_lock); 3293 3294 drm_framebuffer_remove(fb); 3295 3296 return 0; 3297 3298 fail_lookup: 3299 mutex_unlock(&dev->mode_config.fb_lock); 3300 mutex_unlock(&file_priv->fbs_lock); 3301 3302 return -ENOENT; 3303 } 3304 3305 /** 3306 * drm_mode_getfb - get FB info 3307 * @dev: drm device for the ioctl 3308 * @data: data pointer for the ioctl 3309 * @file_priv: drm file for the ioctl call 3310 * 3311 * Lookup the FB given its ID and return info about it. 3312 * 3313 * Called by the user via ioctl. 3314 * 3315 * Returns: 3316 * Zero on success, negative errno on failure. 3317 */ 3318 int drm_mode_getfb(struct drm_device *dev, 3319 void *data, struct drm_file *file_priv) 3320 { 3321 struct drm_mode_fb_cmd *r = data; 3322 struct drm_framebuffer *fb; 3323 int ret; 3324 3325 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3326 return -EINVAL; 3327 3328 fb = drm_framebuffer_lookup(dev, r->fb_id); 3329 if (!fb) 3330 return -ENOENT; 3331 3332 r->height = fb->height; 3333 r->width = fb->width; 3334 r->depth = fb->depth; 3335 r->bpp = fb->bits_per_pixel; 3336 r->pitch = fb->pitches[0]; 3337 if (fb->funcs->create_handle) { 3338 if (file_priv->is_master || capable(CAP_SYS_ADMIN) || 3339 drm_is_control_client(file_priv)) { 3340 ret = fb->funcs->create_handle(fb, file_priv, 3341 &r->handle); 3342 } else { 3343 /* GET_FB() is an unprivileged ioctl so we must not 3344 * return a buffer-handle to non-master processes! For 3345 * backwards-compatibility reasons, we cannot make 3346 * GET_FB() privileged, so just return an invalid handle 3347 * for non-masters. */ 3348 r->handle = 0; 3349 ret = 0; 3350 } 3351 } else { 3352 ret = -ENODEV; 3353 } 3354 3355 drm_framebuffer_unreference(fb); 3356 3357 return ret; 3358 } 3359 3360 /** 3361 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3362 * @dev: drm device for the ioctl 3363 * @data: data pointer for the ioctl 3364 * @file_priv: drm file for the ioctl call 3365 * 3366 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3367 * rectangle list. Generic userspace which does frontbuffer rendering must call 3368 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3369 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3370 * 3371 * Modesetting drivers which always update the frontbuffer do not need to 3372 * implement the corresponding ->dirty framebuffer callback. 3373 * 3374 * Called by the user via ioctl. 3375 * 3376 * Returns: 3377 * Zero on success, negative errno on failure. 3378 */ 3379 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3380 void *data, struct drm_file *file_priv) 3381 { 3382 struct drm_clip_rect __user *clips_ptr; 3383 struct drm_clip_rect *clips = NULL; 3384 struct drm_mode_fb_dirty_cmd *r = data; 3385 struct drm_framebuffer *fb; 3386 unsigned flags; 3387 int num_clips; 3388 int ret; 3389 3390 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3391 return -EINVAL; 3392 3393 fb = drm_framebuffer_lookup(dev, r->fb_id); 3394 if (!fb) 3395 return -ENOENT; 3396 3397 num_clips = r->num_clips; 3398 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3399 3400 if (!num_clips != !clips_ptr) { 3401 ret = -EINVAL; 3402 goto out_err1; 3403 } 3404 3405 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3406 3407 /* If userspace annotates copy, clips must come in pairs */ 3408 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3409 ret = -EINVAL; 3410 goto out_err1; 3411 } 3412 3413 if (num_clips && clips_ptr) { 3414 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3415 ret = -EINVAL; 3416 goto out_err1; 3417 } 3418 clips = kzalloc(num_clips * sizeof(*clips), GFP_KERNEL); 3419 if (!clips) { 3420 ret = -ENOMEM; 3421 goto out_err1; 3422 } 3423 3424 ret = copy_from_user(clips, clips_ptr, 3425 num_clips * sizeof(*clips)); 3426 if (ret) { 3427 ret = -EFAULT; 3428 goto out_err2; 3429 } 3430 } 3431 3432 if (fb->funcs->dirty) { 3433 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3434 clips, num_clips); 3435 } else { 3436 ret = -ENOSYS; 3437 } 3438 3439 out_err2: 3440 kfree(clips); 3441 out_err1: 3442 drm_framebuffer_unreference(fb); 3443 3444 return ret; 3445 } 3446 3447 3448 /** 3449 * drm_fb_release - remove and free the FBs on this file 3450 * @priv: drm file for the ioctl 3451 * 3452 * Destroy all the FBs associated with @filp. 3453 * 3454 * Called by the user via ioctl. 3455 * 3456 * Returns: 3457 * Zero on success, negative errno on failure. 3458 */ 3459 void drm_fb_release(struct drm_file *priv) 3460 { 3461 struct drm_device *dev = priv->minor->dev; 3462 struct drm_framebuffer *fb, *tfb; 3463 3464 /* 3465 * When the file gets released that means no one else can access the fb 3466 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3467 * avoid upsetting lockdep since the universal cursor code adds a 3468 * framebuffer while holding mutex locks. 3469 * 3470 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3471 * locks is impossible here since no one else but this function can get 3472 * at it any more. 3473 */ 3474 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3475 3476 mutex_lock(&dev->mode_config.fb_lock); 3477 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ 3478 __drm_framebuffer_unregister(dev, fb); 3479 mutex_unlock(&dev->mode_config.fb_lock); 3480 3481 list_del_init(&fb->filp_head); 3482 3483 /* This will also drop the fpriv->fbs reference. */ 3484 drm_framebuffer_remove(fb); 3485 } 3486 } 3487 3488 /** 3489 * drm_property_create - create a new property type 3490 * @dev: drm device 3491 * @flags: flags specifying the property type 3492 * @name: name of the property 3493 * @num_values: number of pre-defined values 3494 * 3495 * This creates a new generic drm property which can then be attached to a drm 3496 * object with drm_object_attach_property. The returned property object must be 3497 * freed with drm_property_destroy. 3498 * 3499 * Note that the DRM core keeps a per-device list of properties and that, if 3500 * drm_mode_config_cleanup() is called, it will destroy all properties created 3501 * by the driver. 3502 * 3503 * Returns: 3504 * A pointer to the newly created property on success, NULL on failure. 3505 */ 3506 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3507 const char *name, int num_values) 3508 { 3509 struct drm_property *property = NULL; 3510 int ret; 3511 3512 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3513 if (!property) 3514 return NULL; 3515 3516 property->dev = dev; 3517 3518 if (num_values) { 3519 property->values = kzalloc(sizeof(uint64_t)*num_values, GFP_KERNEL); 3520 if (!property->values) 3521 goto fail; 3522 } 3523 3524 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3525 if (ret) 3526 goto fail; 3527 3528 property->flags = flags; 3529 property->num_values = num_values; 3530 INIT_LIST_HEAD(&property->enum_list); 3531 3532 if (name) { 3533 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3534 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3535 } 3536 3537 list_add_tail(&property->head, &dev->mode_config.property_list); 3538 3539 WARN_ON(!drm_property_type_valid(property)); 3540 3541 return property; 3542 fail: 3543 kfree(property->values); 3544 kfree(property); 3545 return NULL; 3546 } 3547 EXPORT_SYMBOL(drm_property_create); 3548 3549 /** 3550 * drm_property_create_enum - create a new enumeration property type 3551 * @dev: drm device 3552 * @flags: flags specifying the property type 3553 * @name: name of the property 3554 * @props: enumeration lists with property values 3555 * @num_values: number of pre-defined values 3556 * 3557 * This creates a new generic drm property which can then be attached to a drm 3558 * object with drm_object_attach_property. The returned property object must be 3559 * freed with drm_property_destroy. 3560 * 3561 * Userspace is only allowed to set one of the predefined values for enumeration 3562 * properties. 3563 * 3564 * Returns: 3565 * A pointer to the newly created property on success, NULL on failure. 3566 */ 3567 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3568 const char *name, 3569 const struct drm_prop_enum_list *props, 3570 int num_values) 3571 { 3572 struct drm_property *property; 3573 int i, ret; 3574 3575 flags |= DRM_MODE_PROP_ENUM; 3576 3577 property = drm_property_create(dev, flags, name, num_values); 3578 if (!property) 3579 return NULL; 3580 3581 for (i = 0; i < num_values; i++) { 3582 ret = drm_property_add_enum(property, i, 3583 props[i].type, 3584 props[i].name); 3585 if (ret) { 3586 drm_property_destroy(dev, property); 3587 return NULL; 3588 } 3589 } 3590 3591 return property; 3592 } 3593 EXPORT_SYMBOL(drm_property_create_enum); 3594 3595 /** 3596 * drm_property_create_bitmask - create a new bitmask property type 3597 * @dev: drm device 3598 * @flags: flags specifying the property type 3599 * @name: name of the property 3600 * @props: enumeration lists with property bitflags 3601 * @num_props: size of the @props array 3602 * @supported_bits: bitmask of all supported enumeration values 3603 * 3604 * This creates a new bitmask drm property which can then be attached to a drm 3605 * object with drm_object_attach_property. The returned property object must be 3606 * freed with drm_property_destroy. 3607 * 3608 * Compared to plain enumeration properties userspace is allowed to set any 3609 * or'ed together combination of the predefined property bitflag values 3610 * 3611 * Returns: 3612 * A pointer to the newly created property on success, NULL on failure. 3613 */ 3614 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3615 int flags, const char *name, 3616 const struct drm_prop_enum_list *props, 3617 int num_props, 3618 uint64_t supported_bits) 3619 { 3620 struct drm_property *property; 3621 int i, ret, index = 0; 3622 int num_values = hweight64(supported_bits); 3623 3624 flags |= DRM_MODE_PROP_BITMASK; 3625 3626 property = drm_property_create(dev, flags, name, num_values); 3627 if (!property) 3628 return NULL; 3629 for (i = 0; i < num_props; i++) { 3630 if (!(supported_bits & (1ULL << props[i].type))) 3631 continue; 3632 3633 if (WARN_ON(index >= num_values)) { 3634 drm_property_destroy(dev, property); 3635 return NULL; 3636 } 3637 3638 ret = drm_property_add_enum(property, index++, 3639 props[i].type, 3640 props[i].name); 3641 if (ret) { 3642 drm_property_destroy(dev, property); 3643 return NULL; 3644 } 3645 } 3646 3647 return property; 3648 } 3649 EXPORT_SYMBOL(drm_property_create_bitmask); 3650 3651 static struct drm_property *property_create_range(struct drm_device *dev, 3652 int flags, const char *name, 3653 uint64_t min, uint64_t max) 3654 { 3655 struct drm_property *property; 3656 3657 property = drm_property_create(dev, flags, name, 2); 3658 if (!property) 3659 return NULL; 3660 3661 property->values[0] = min; 3662 property->values[1] = max; 3663 3664 return property; 3665 } 3666 3667 /** 3668 * drm_property_create_range - create a new ranged property type 3669 * @dev: drm device 3670 * @flags: flags specifying the property type 3671 * @name: name of the property 3672 * @min: minimum value of the property 3673 * @max: maximum value of the property 3674 * 3675 * This creates a new generic drm property which can then be attached to a drm 3676 * object with drm_object_attach_property. The returned property object must be 3677 * freed with drm_property_destroy. 3678 * 3679 * Userspace is allowed to set any integer value in the (min, max) range 3680 * inclusive. 3681 * 3682 * Returns: 3683 * A pointer to the newly created property on success, NULL on failure. 3684 */ 3685 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3686 const char *name, 3687 uint64_t min, uint64_t max) 3688 { 3689 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3690 name, min, max); 3691 } 3692 EXPORT_SYMBOL(drm_property_create_range); 3693 3694 struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3695 int flags, const char *name, 3696 int64_t min, int64_t max) 3697 { 3698 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3699 name, I642U64(min), I642U64(max)); 3700 } 3701 EXPORT_SYMBOL(drm_property_create_signed_range); 3702 3703 struct drm_property *drm_property_create_object(struct drm_device *dev, 3704 int flags, const char *name, uint32_t type) 3705 { 3706 struct drm_property *property; 3707 3708 flags |= DRM_MODE_PROP_OBJECT; 3709 3710 property = drm_property_create(dev, flags, name, 1); 3711 if (!property) 3712 return NULL; 3713 3714 property->values[0] = type; 3715 3716 return property; 3717 } 3718 EXPORT_SYMBOL(drm_property_create_object); 3719 3720 /** 3721 * drm_property_add_enum - add a possible value to an enumeration property 3722 * @property: enumeration property to change 3723 * @index: index of the new enumeration 3724 * @value: value of the new enumeration 3725 * @name: symbolic name of the new enumeration 3726 * 3727 * This functions adds enumerations to a property. 3728 * 3729 * It's use is deprecated, drivers should use one of the more specific helpers 3730 * to directly create the property with all enumerations already attached. 3731 * 3732 * Returns: 3733 * Zero on success, error code on failure. 3734 */ 3735 int drm_property_add_enum(struct drm_property *property, int index, 3736 uint64_t value, const char *name) 3737 { 3738 struct drm_property_enum *prop_enum; 3739 3740 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3741 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3742 return -EINVAL; 3743 3744 /* 3745 * Bitmask enum properties have the additional constraint of values 3746 * from 0 to 63 3747 */ 3748 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3749 (value > 63)) 3750 return -EINVAL; 3751 3752 if (!list_empty(&property->enum_list)) { 3753 list_for_each_entry(prop_enum, &property->enum_list, head) { 3754 if (prop_enum->value == value) { 3755 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3756 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3757 return 0; 3758 } 3759 } 3760 } 3761 3762 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3763 if (!prop_enum) 3764 return -ENOMEM; 3765 3766 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3767 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3768 prop_enum->value = value; 3769 3770 property->values[index] = value; 3771 list_add_tail(&prop_enum->head, &property->enum_list); 3772 return 0; 3773 } 3774 EXPORT_SYMBOL(drm_property_add_enum); 3775 3776 /** 3777 * drm_property_destroy - destroy a drm property 3778 * @dev: drm device 3779 * @property: property to destry 3780 * 3781 * This function frees a property including any attached resources like 3782 * enumeration values. 3783 */ 3784 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 3785 { 3786 struct drm_property_enum *prop_enum, *pt; 3787 3788 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 3789 list_del(&prop_enum->head); 3790 kfree(prop_enum); 3791 } 3792 3793 if (property->num_values) 3794 kfree(property->values); 3795 drm_mode_object_put(dev, &property->base); 3796 list_del(&property->head); 3797 kfree(property); 3798 } 3799 EXPORT_SYMBOL(drm_property_destroy); 3800 3801 /** 3802 * drm_object_attach_property - attach a property to a modeset object 3803 * @obj: drm modeset object 3804 * @property: property to attach 3805 * @init_val: initial value of the property 3806 * 3807 * This attaches the given property to the modeset object with the given initial 3808 * value. Currently this function cannot fail since the properties are stored in 3809 * a statically sized array. 3810 */ 3811 void drm_object_attach_property(struct drm_mode_object *obj, 3812 struct drm_property *property, 3813 uint64_t init_val) 3814 { 3815 int count = obj->properties->count; 3816 3817 if (count == DRM_OBJECT_MAX_PROPERTY) { 3818 WARN(1, "Failed to attach object property (type: 0x%x). Please " 3819 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 3820 "you see this message on the same object type.\n", 3821 obj->type); 3822 return; 3823 } 3824 3825 obj->properties->ids[count] = property->base.id; 3826 obj->properties->values[count] = init_val; 3827 obj->properties->count++; 3828 } 3829 EXPORT_SYMBOL(drm_object_attach_property); 3830 3831 /** 3832 * drm_object_property_set_value - set the value of a property 3833 * @obj: drm mode object to set property value for 3834 * @property: property to set 3835 * @val: value the property should be set to 3836 * 3837 * This functions sets a given property on a given object. This function only 3838 * changes the software state of the property, it does not call into the 3839 * driver's ->set_property callback. 3840 * 3841 * Returns: 3842 * Zero on success, error code on failure. 3843 */ 3844 int drm_object_property_set_value(struct drm_mode_object *obj, 3845 struct drm_property *property, uint64_t val) 3846 { 3847 int i; 3848 3849 for (i = 0; i < obj->properties->count; i++) { 3850 if (obj->properties->ids[i] == property->base.id) { 3851 obj->properties->values[i] = val; 3852 return 0; 3853 } 3854 } 3855 3856 return -EINVAL; 3857 } 3858 EXPORT_SYMBOL(drm_object_property_set_value); 3859 3860 /** 3861 * drm_object_property_get_value - retrieve the value of a property 3862 * @obj: drm mode object to get property value from 3863 * @property: property to retrieve 3864 * @val: storage for the property value 3865 * 3866 * This function retrieves the softare state of the given property for the given 3867 * property. Since there is no driver callback to retrieve the current property 3868 * value this might be out of sync with the hardware, depending upon the driver 3869 * and property. 3870 * 3871 * Returns: 3872 * Zero on success, error code on failure. 3873 */ 3874 int drm_object_property_get_value(struct drm_mode_object *obj, 3875 struct drm_property *property, uint64_t *val) 3876 { 3877 int i; 3878 3879 for (i = 0; i < obj->properties->count; i++) { 3880 if (obj->properties->ids[i] == property->base.id) { 3881 *val = obj->properties->values[i]; 3882 return 0; 3883 } 3884 } 3885 3886 return -EINVAL; 3887 } 3888 EXPORT_SYMBOL(drm_object_property_get_value); 3889 3890 /** 3891 * drm_mode_getproperty_ioctl - get the property metadata 3892 * @dev: DRM device 3893 * @data: ioctl data 3894 * @file_priv: DRM file info 3895 * 3896 * This function retrieves the metadata for a given property, like the different 3897 * possible values for an enum property or the limits for a range property. 3898 * 3899 * Blob properties are special 3900 * 3901 * Called by the user via ioctl. 3902 * 3903 * Returns: 3904 * Zero on success, negative errno on failure. 3905 */ 3906 int drm_mode_getproperty_ioctl(struct drm_device *dev, 3907 void *data, struct drm_file *file_priv) 3908 { 3909 struct drm_mode_get_property *out_resp = data; 3910 struct drm_property *property; 3911 int enum_count = 0; 3912 int value_count = 0; 3913 int ret = 0, i; 3914 int copied; 3915 struct drm_property_enum *prop_enum; 3916 struct drm_mode_property_enum __user *enum_ptr; 3917 uint64_t __user *values_ptr; 3918 3919 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3920 return -EINVAL; 3921 3922 drm_modeset_lock_all(dev); 3923 property = drm_property_find(dev, out_resp->prop_id); 3924 if (!property) { 3925 ret = -ENOENT; 3926 goto done; 3927 } 3928 3929 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3930 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 3931 list_for_each_entry(prop_enum, &property->enum_list, head) 3932 enum_count++; 3933 } 3934 3935 value_count = property->num_values; 3936 3937 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 3938 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 3939 out_resp->flags = property->flags; 3940 3941 if ((out_resp->count_values >= value_count) && value_count) { 3942 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 3943 for (i = 0; i < value_count; i++) { 3944 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 3945 ret = -EFAULT; 3946 goto done; 3947 } 3948 } 3949 } 3950 out_resp->count_values = value_count; 3951 3952 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3953 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 3954 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 3955 copied = 0; 3956 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 3957 list_for_each_entry(prop_enum, &property->enum_list, head) { 3958 3959 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 3960 ret = -EFAULT; 3961 goto done; 3962 } 3963 3964 if (copy_to_user(&enum_ptr[copied].name, 3965 &prop_enum->name, DRM_PROP_NAME_LEN)) { 3966 ret = -EFAULT; 3967 goto done; 3968 } 3969 copied++; 3970 } 3971 } 3972 out_resp->count_enum_blobs = enum_count; 3973 } 3974 3975 /* 3976 * NOTE: The idea seems to have been to use this to read all the blob 3977 * property values. But nothing ever added them to the corresponding 3978 * list, userspace always used the special-purpose get_blob ioctl to 3979 * read the value for a blob property. It also doesn't make a lot of 3980 * sense to return values here when everything else is just metadata for 3981 * the property itself. 3982 */ 3983 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 3984 out_resp->count_enum_blobs = 0; 3985 done: 3986 drm_modeset_unlock_all(dev); 3987 return ret; 3988 } 3989 3990 static struct drm_property_blob * 3991 drm_property_create_blob(struct drm_device *dev, size_t length, 3992 const void *data) 3993 { 3994 struct drm_property_blob *blob; 3995 int ret; 3996 3997 if (!length || !data) 3998 return NULL; 3999 4000 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4001 if (!blob) 4002 return NULL; 4003 4004 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 4005 if (ret) { 4006 kfree(blob); 4007 return NULL; 4008 } 4009 4010 blob->length = length; 4011 4012 memcpy(blob->data, data, length); 4013 4014 list_add_tail(&blob->head, &dev->mode_config.property_blob_list); 4015 return blob; 4016 } 4017 4018 static void drm_property_destroy_blob(struct drm_device *dev, 4019 struct drm_property_blob *blob) 4020 { 4021 drm_mode_object_put(dev, &blob->base); 4022 list_del(&blob->head); 4023 kfree(blob); 4024 } 4025 4026 /** 4027 * drm_mode_getblob_ioctl - get the contents of a blob property value 4028 * @dev: DRM device 4029 * @data: ioctl data 4030 * @file_priv: DRM file info 4031 * 4032 * This function retrieves the contents of a blob property. The value stored in 4033 * an object's blob property is just a normal modeset object id. 4034 * 4035 * Called by the user via ioctl. 4036 * 4037 * Returns: 4038 * Zero on success, negative errno on failure. 4039 */ 4040 int drm_mode_getblob_ioctl(struct drm_device *dev, 4041 void *data, struct drm_file *file_priv) 4042 { 4043 struct drm_mode_get_blob *out_resp = data; 4044 struct drm_property_blob *blob; 4045 int ret = 0; 4046 void __user *blob_ptr; 4047 4048 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4049 return -EINVAL; 4050 4051 drm_modeset_lock_all(dev); 4052 blob = drm_property_blob_find(dev, out_resp->blob_id); 4053 if (!blob) { 4054 ret = -ENOENT; 4055 goto done; 4056 } 4057 4058 if (out_resp->length == blob->length) { 4059 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4060 if (copy_to_user(blob_ptr, blob->data, blob->length)){ 4061 ret = -EFAULT; 4062 goto done; 4063 } 4064 } 4065 out_resp->length = blob->length; 4066 4067 done: 4068 drm_modeset_unlock_all(dev); 4069 return ret; 4070 } 4071 4072 /** 4073 * drm_mode_connector_set_path_property - set tile property on connector 4074 * @connector: connector to set property on. 4075 * @path: path to use for property. 4076 * 4077 * This creates a property to expose to userspace to specify a 4078 * connector path. This is mainly used for DisplayPort MST where 4079 * connectors have a topology and we want to allow userspace to give 4080 * them more meaningful names. 4081 * 4082 * Returns: 4083 * Zero on success, negative errno on failure. 4084 */ 4085 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4086 const char *path) 4087 { 4088 struct drm_device *dev = connector->dev; 4089 size_t size = strlen(path) + 1; 4090 int ret; 4091 4092 connector->path_blob_ptr = drm_property_create_blob(connector->dev, 4093 size, path); 4094 if (!connector->path_blob_ptr) 4095 return -EINVAL; 4096 4097 ret = drm_object_property_set_value(&connector->base, 4098 dev->mode_config.path_property, 4099 connector->path_blob_ptr->base.id); 4100 return ret; 4101 } 4102 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4103 4104 /** 4105 * drm_mode_connector_set_tile_property - set tile property on connector 4106 * @connector: connector to set property on. 4107 * 4108 * This looks up the tile information for a connector, and creates a 4109 * property for userspace to parse if it exists. The property is of 4110 * the form of 8 integers using ':' as a separator. 4111 * 4112 * Returns: 4113 * Zero on success, errno on failure. 4114 */ 4115 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4116 { 4117 struct drm_device *dev = connector->dev; 4118 int ret, size; 4119 char tile[256]; 4120 4121 if (connector->tile_blob_ptr) 4122 drm_property_destroy_blob(dev, connector->tile_blob_ptr); 4123 4124 if (!connector->has_tile) { 4125 connector->tile_blob_ptr = NULL; 4126 ret = drm_object_property_set_value(&connector->base, 4127 dev->mode_config.tile_property, 0); 4128 return ret; 4129 } 4130 4131 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4132 connector->tile_group->id, connector->tile_is_single_monitor, 4133 connector->num_h_tile, connector->num_v_tile, 4134 connector->tile_h_loc, connector->tile_v_loc, 4135 connector->tile_h_size, connector->tile_v_size); 4136 size = strlen(tile) + 1; 4137 4138 connector->tile_blob_ptr = drm_property_create_blob(connector->dev, 4139 size, tile); 4140 if (!connector->tile_blob_ptr) 4141 return -EINVAL; 4142 4143 ret = drm_object_property_set_value(&connector->base, 4144 dev->mode_config.tile_property, 4145 connector->tile_blob_ptr->base.id); 4146 return ret; 4147 } 4148 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4149 4150 /** 4151 * drm_mode_connector_update_edid_property - update the edid property of a connector 4152 * @connector: drm connector 4153 * @edid: new value of the edid property 4154 * 4155 * This function creates a new blob modeset object and assigns its id to the 4156 * connector's edid property. 4157 * 4158 * Returns: 4159 * Zero on success, negative errno on failure. 4160 */ 4161 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4162 const struct edid *edid) 4163 { 4164 struct drm_device *dev = connector->dev; 4165 size_t size; 4166 int ret; 4167 4168 /* ignore requests to set edid when overridden */ 4169 if (connector->override_edid) 4170 return 0; 4171 4172 if (connector->edid_blob_ptr) 4173 drm_property_destroy_blob(dev, connector->edid_blob_ptr); 4174 4175 /* Delete edid, when there is none. */ 4176 if (!edid) { 4177 connector->edid_blob_ptr = NULL; 4178 ret = drm_object_property_set_value(&connector->base, dev->mode_config.edid_property, 0); 4179 return ret; 4180 } 4181 4182 size = EDID_LENGTH * (1 + edid->extensions); 4183 connector->edid_blob_ptr = drm_property_create_blob(connector->dev, 4184 size, edid); 4185 if (!connector->edid_blob_ptr) 4186 return -EINVAL; 4187 4188 ret = drm_object_property_set_value(&connector->base, 4189 dev->mode_config.edid_property, 4190 connector->edid_blob_ptr->base.id); 4191 4192 return ret; 4193 } 4194 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4195 4196 static bool drm_property_change_is_valid(struct drm_property *property, 4197 uint64_t value) 4198 { 4199 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4200 return false; 4201 4202 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4203 if (value < property->values[0] || value > property->values[1]) 4204 return false; 4205 return true; 4206 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4207 int64_t svalue = U642I64(value); 4208 if (svalue < U642I64(property->values[0]) || 4209 svalue > U642I64(property->values[1])) 4210 return false; 4211 return true; 4212 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4213 int i; 4214 uint64_t valid_mask = 0; 4215 for (i = 0; i < property->num_values; i++) 4216 valid_mask |= (1ULL << property->values[i]); 4217 return !(value & ~valid_mask); 4218 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4219 /* Only the driver knows */ 4220 return true; 4221 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4222 struct drm_mode_object *obj; 4223 /* a zero value for an object property translates to null: */ 4224 if (value == 0) 4225 return true; 4226 /* 4227 * NOTE: use _object_find() directly to bypass restriction on 4228 * looking up refcnt'd objects (ie. fb's). For a refcnt'd 4229 * object this could race against object finalization, so it 4230 * simply tells us that the object *was* valid. Which is good 4231 * enough. 4232 */ 4233 obj = _object_find(property->dev, value, property->values[0]); 4234 return obj != NULL; 4235 } else { 4236 int i; 4237 for (i = 0; i < property->num_values; i++) 4238 if (property->values[i] == value) 4239 return true; 4240 return false; 4241 } 4242 } 4243 4244 /** 4245 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4246 * @dev: DRM device 4247 * @data: ioctl data 4248 * @file_priv: DRM file info 4249 * 4250 * This function sets the current value for a connectors's property. It also 4251 * calls into a driver's ->set_property callback to update the hardware state 4252 * 4253 * Called by the user via ioctl. 4254 * 4255 * Returns: 4256 * Zero on success, negative errno on failure. 4257 */ 4258 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4259 void *data, struct drm_file *file_priv) 4260 { 4261 struct drm_mode_connector_set_property *conn_set_prop = data; 4262 struct drm_mode_obj_set_property obj_set_prop = { 4263 .value = conn_set_prop->value, 4264 .prop_id = conn_set_prop->prop_id, 4265 .obj_id = conn_set_prop->connector_id, 4266 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4267 }; 4268 4269 /* It does all the locking and checking we need */ 4270 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4271 } 4272 4273 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4274 struct drm_property *property, 4275 uint64_t value) 4276 { 4277 int ret = -EINVAL; 4278 struct drm_connector *connector = obj_to_connector(obj); 4279 4280 /* Do DPMS ourselves */ 4281 if (property == connector->dev->mode_config.dpms_property) { 4282 if (connector->funcs->dpms) 4283 (*connector->funcs->dpms)(connector, (int)value); 4284 ret = 0; 4285 } else if (connector->funcs->set_property) 4286 ret = connector->funcs->set_property(connector, property, value); 4287 4288 /* store the property value if successful */ 4289 if (!ret) 4290 drm_object_property_set_value(&connector->base, property, value); 4291 return ret; 4292 } 4293 4294 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4295 struct drm_property *property, 4296 uint64_t value) 4297 { 4298 int ret = -EINVAL; 4299 struct drm_crtc *crtc = obj_to_crtc(obj); 4300 4301 if (crtc->funcs->set_property) 4302 ret = crtc->funcs->set_property(crtc, property, value); 4303 if (!ret) 4304 drm_object_property_set_value(obj, property, value); 4305 4306 return ret; 4307 } 4308 4309 /** 4310 * drm_mode_plane_set_obj_prop - set the value of a property 4311 * @plane: drm plane object to set property value for 4312 * @property: property to set 4313 * @value: value the property should be set to 4314 * 4315 * This functions sets a given property on a given plane object. This function 4316 * calls the driver's ->set_property callback and changes the software state of 4317 * the property if the callback succeeds. 4318 * 4319 * Returns: 4320 * Zero on success, error code on failure. 4321 */ 4322 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4323 struct drm_property *property, 4324 uint64_t value) 4325 { 4326 int ret = -EINVAL; 4327 struct drm_mode_object *obj = &plane->base; 4328 4329 if (plane->funcs->set_property) 4330 ret = plane->funcs->set_property(plane, property, value); 4331 if (!ret) 4332 drm_object_property_set_value(obj, property, value); 4333 4334 return ret; 4335 } 4336 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4337 4338 /** 4339 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 4340 * @dev: DRM device 4341 * @data: ioctl data 4342 * @file_priv: DRM file info 4343 * 4344 * This function retrieves the current value for an object's property. Compared 4345 * to the connector specific ioctl this one is extended to also work on crtc and 4346 * plane objects. 4347 * 4348 * Called by the user via ioctl. 4349 * 4350 * Returns: 4351 * Zero on success, negative errno on failure. 4352 */ 4353 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4354 struct drm_file *file_priv) 4355 { 4356 struct drm_mode_obj_get_properties *arg = data; 4357 struct drm_mode_object *obj; 4358 int ret = 0; 4359 int i; 4360 int copied = 0; 4361 int props_count = 0; 4362 uint32_t __user *props_ptr; 4363 uint64_t __user *prop_values_ptr; 4364 4365 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4366 return -EINVAL; 4367 4368 drm_modeset_lock_all(dev); 4369 4370 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4371 if (!obj) { 4372 ret = -ENOENT; 4373 goto out; 4374 } 4375 if (!obj->properties) { 4376 ret = -EINVAL; 4377 goto out; 4378 } 4379 4380 props_count = obj->properties->count; 4381 4382 /* This ioctl is called twice, once to determine how much space is 4383 * needed, and the 2nd time to fill it. */ 4384 if ((arg->count_props >= props_count) && props_count) { 4385 copied = 0; 4386 props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr); 4387 prop_values_ptr = (uint64_t __user *)(unsigned long) 4388 (arg->prop_values_ptr); 4389 for (i = 0; i < props_count; i++) { 4390 if (put_user(obj->properties->ids[i], 4391 props_ptr + copied)) { 4392 ret = -EFAULT; 4393 goto out; 4394 } 4395 if (put_user(obj->properties->values[i], 4396 prop_values_ptr + copied)) { 4397 ret = -EFAULT; 4398 goto out; 4399 } 4400 copied++; 4401 } 4402 } 4403 arg->count_props = props_count; 4404 out: 4405 drm_modeset_unlock_all(dev); 4406 return ret; 4407 } 4408 4409 /** 4410 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 4411 * @dev: DRM device 4412 * @data: ioctl data 4413 * @file_priv: DRM file info 4414 * 4415 * This function sets the current value for an object's property. It also calls 4416 * into a driver's ->set_property callback to update the hardware state. 4417 * Compared to the connector specific ioctl this one is extended to also work on 4418 * crtc and plane objects. 4419 * 4420 * Called by the user via ioctl. 4421 * 4422 * Returns: 4423 * Zero on success, negative errno on failure. 4424 */ 4425 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 4426 struct drm_file *file_priv) 4427 { 4428 struct drm_mode_obj_set_property *arg = data; 4429 struct drm_mode_object *arg_obj; 4430 struct drm_mode_object *prop_obj; 4431 struct drm_property *property; 4432 int ret = -EINVAL; 4433 int i; 4434 4435 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4436 return -EINVAL; 4437 4438 drm_modeset_lock_all(dev); 4439 4440 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4441 if (!arg_obj) { 4442 ret = -ENOENT; 4443 goto out; 4444 } 4445 if (!arg_obj->properties) 4446 goto out; 4447 4448 for (i = 0; i < arg_obj->properties->count; i++) 4449 if (arg_obj->properties->ids[i] == arg->prop_id) 4450 break; 4451 4452 if (i == arg_obj->properties->count) 4453 goto out; 4454 4455 prop_obj = drm_mode_object_find(dev, arg->prop_id, 4456 DRM_MODE_OBJECT_PROPERTY); 4457 if (!prop_obj) { 4458 ret = -ENOENT; 4459 goto out; 4460 } 4461 property = obj_to_property(prop_obj); 4462 4463 if (!drm_property_change_is_valid(property, arg->value)) 4464 goto out; 4465 4466 switch (arg_obj->type) { 4467 case DRM_MODE_OBJECT_CONNECTOR: 4468 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 4469 arg->value); 4470 break; 4471 case DRM_MODE_OBJECT_CRTC: 4472 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 4473 break; 4474 case DRM_MODE_OBJECT_PLANE: 4475 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 4476 property, arg->value); 4477 break; 4478 } 4479 4480 out: 4481 drm_modeset_unlock_all(dev); 4482 return ret; 4483 } 4484 4485 /** 4486 * drm_mode_connector_attach_encoder - attach a connector to an encoder 4487 * @connector: connector to attach 4488 * @encoder: encoder to attach @connector to 4489 * 4490 * This function links up a connector to an encoder. Note that the routing 4491 * restrictions between encoders and crtcs are exposed to userspace through the 4492 * possible_clones and possible_crtcs bitmasks. 4493 * 4494 * Returns: 4495 * Zero on success, negative errno on failure. 4496 */ 4497 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 4498 struct drm_encoder *encoder) 4499 { 4500 int i; 4501 4502 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 4503 if (connector->encoder_ids[i] == 0) { 4504 connector->encoder_ids[i] = encoder->base.id; 4505 return 0; 4506 } 4507 } 4508 return -ENOMEM; 4509 } 4510 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 4511 4512 /** 4513 * drm_mode_crtc_set_gamma_size - set the gamma table size 4514 * @crtc: CRTC to set the gamma table size for 4515 * @gamma_size: size of the gamma table 4516 * 4517 * Drivers which support gamma tables should set this to the supported gamma 4518 * table size when initializing the CRTC. Currently the drm core only supports a 4519 * fixed gamma table size. 4520 * 4521 * Returns: 4522 * Zero on success, negative errno on failure. 4523 */ 4524 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 4525 int gamma_size) 4526 { 4527 crtc->gamma_size = gamma_size; 4528 4529 crtc->gamma_store = kzalloc(gamma_size * sizeof(uint16_t) * 3, GFP_KERNEL); 4530 if (!crtc->gamma_store) { 4531 crtc->gamma_size = 0; 4532 return -ENOMEM; 4533 } 4534 4535 return 0; 4536 } 4537 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 4538 4539 /** 4540 * drm_mode_gamma_set_ioctl - set the gamma table 4541 * @dev: DRM device 4542 * @data: ioctl data 4543 * @file_priv: DRM file info 4544 * 4545 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 4546 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 4547 * 4548 * Called by the user via ioctl. 4549 * 4550 * Returns: 4551 * Zero on success, negative errno on failure. 4552 */ 4553 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 4554 void *data, struct drm_file *file_priv) 4555 { 4556 struct drm_mode_crtc_lut *crtc_lut = data; 4557 struct drm_crtc *crtc; 4558 void *r_base, *g_base, *b_base; 4559 int size; 4560 int ret = 0; 4561 4562 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4563 return -EINVAL; 4564 4565 drm_modeset_lock_all(dev); 4566 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 4567 if (!crtc) { 4568 ret = -ENOENT; 4569 goto out; 4570 } 4571 4572 if (crtc->funcs->gamma_set == NULL) { 4573 ret = -ENOSYS; 4574 goto out; 4575 } 4576 4577 /* memcpy into gamma store */ 4578 if (crtc_lut->gamma_size != crtc->gamma_size) { 4579 ret = -EINVAL; 4580 goto out; 4581 } 4582 4583 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 4584 r_base = crtc->gamma_store; 4585 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 4586 ret = -EFAULT; 4587 goto out; 4588 } 4589 4590 g_base = r_base + size; 4591 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 4592 ret = -EFAULT; 4593 goto out; 4594 } 4595 4596 b_base = g_base + size; 4597 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 4598 ret = -EFAULT; 4599 goto out; 4600 } 4601 4602 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 4603 4604 out: 4605 drm_modeset_unlock_all(dev); 4606 return ret; 4607 4608 } 4609 4610 /** 4611 * drm_mode_gamma_get_ioctl - get the gamma table 4612 * @dev: DRM device 4613 * @data: ioctl data 4614 * @file_priv: DRM file info 4615 * 4616 * Copy the current gamma table into the storage provided. This also provides 4617 * the gamma table size the driver expects, which can be used to size the 4618 * allocated storage. 4619 * 4620 * Called by the user via ioctl. 4621 * 4622 * Returns: 4623 * Zero on success, negative errno on failure. 4624 */ 4625 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 4626 void *data, struct drm_file *file_priv) 4627 { 4628 struct drm_mode_crtc_lut *crtc_lut = data; 4629 struct drm_crtc *crtc; 4630 void *r_base, *g_base, *b_base; 4631 int size; 4632 int ret = 0; 4633 4634 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4635 return -EINVAL; 4636 4637 drm_modeset_lock_all(dev); 4638 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 4639 if (!crtc) { 4640 ret = -ENOENT; 4641 goto out; 4642 } 4643 4644 /* memcpy into gamma store */ 4645 if (crtc_lut->gamma_size != crtc->gamma_size) { 4646 ret = -EINVAL; 4647 goto out; 4648 } 4649 4650 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 4651 r_base = crtc->gamma_store; 4652 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 4653 ret = -EFAULT; 4654 goto out; 4655 } 4656 4657 g_base = r_base + size; 4658 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 4659 ret = -EFAULT; 4660 goto out; 4661 } 4662 4663 b_base = g_base + size; 4664 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 4665 ret = -EFAULT; 4666 goto out; 4667 } 4668 out: 4669 drm_modeset_unlock_all(dev); 4670 return ret; 4671 } 4672 4673 /** 4674 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 4675 * @dev: DRM device 4676 * @data: ioctl data 4677 * @file_priv: DRM file info 4678 * 4679 * This schedules an asynchronous update on a given CRTC, called page flip. 4680 * Optionally a drm event is generated to signal the completion of the event. 4681 * Generic drivers cannot assume that a pageflip with changed framebuffer 4682 * properties (including driver specific metadata like tiling layout) will work, 4683 * but some drivers support e.g. pixel format changes through the pageflip 4684 * ioctl. 4685 * 4686 * Called by the user via ioctl. 4687 * 4688 * Returns: 4689 * Zero on success, negative errno on failure. 4690 */ 4691 int drm_mode_page_flip_ioctl(struct drm_device *dev, 4692 void *data, struct drm_file *file_priv) 4693 { 4694 struct drm_mode_crtc_page_flip *page_flip = data; 4695 struct drm_crtc *crtc; 4696 struct drm_framebuffer *fb = NULL; 4697 struct drm_pending_vblank_event *e = NULL; 4698 unsigned long flags; 4699 int ret = -EINVAL; 4700 4701 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 4702 page_flip->reserved != 0) 4703 return -EINVAL; 4704 4705 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 4706 return -EINVAL; 4707 4708 crtc = drm_crtc_find(dev, page_flip->crtc_id); 4709 if (!crtc) 4710 return -ENOENT; 4711 4712 drm_modeset_lock_crtc(crtc, crtc->primary); 4713 if (crtc->primary->fb == NULL) { 4714 /* The framebuffer is currently unbound, presumably 4715 * due to a hotplug event, that userspace has not 4716 * yet discovered. 4717 */ 4718 ret = -EBUSY; 4719 goto out; 4720 } 4721 4722 if (crtc->funcs->page_flip == NULL) 4723 goto out; 4724 4725 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 4726 if (!fb) { 4727 ret = -ENOENT; 4728 goto out; 4729 } 4730 4731 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 4732 if (ret) 4733 goto out; 4734 4735 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 4736 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 4737 ret = -EINVAL; 4738 goto out; 4739 } 4740 4741 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 4742 ret = -ENOMEM; 4743 spin_lock_irqsave(&dev->event_lock, flags); 4744 if (file_priv->event_space < sizeof e->event) { 4745 spin_unlock_irqrestore(&dev->event_lock, flags); 4746 goto out; 4747 } 4748 file_priv->event_space -= sizeof e->event; 4749 spin_unlock_irqrestore(&dev->event_lock, flags); 4750 4751 e = kzalloc(sizeof *e, GFP_KERNEL); 4752 if (e == NULL) { 4753 spin_lock_irqsave(&dev->event_lock, flags); 4754 file_priv->event_space += sizeof e->event; 4755 spin_unlock_irqrestore(&dev->event_lock, flags); 4756 goto out; 4757 } 4758 4759 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 4760 e->event.base.length = sizeof e->event; 4761 e->event.user_data = page_flip->user_data; 4762 e->base.event = &e->event.base; 4763 e->base.file_priv = file_priv; 4764 e->base.destroy = 4765 (void (*) (struct drm_pending_event *)) kfree; 4766 } 4767 4768 crtc->primary->old_fb = crtc->primary->fb; 4769 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 4770 if (ret) { 4771 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 4772 spin_lock_irqsave(&dev->event_lock, flags); 4773 file_priv->event_space += sizeof e->event; 4774 spin_unlock_irqrestore(&dev->event_lock, flags); 4775 kfree(e); 4776 } 4777 /* Keep the old fb, don't unref it. */ 4778 crtc->primary->old_fb = NULL; 4779 } else { 4780 /* 4781 * Warn if the driver hasn't properly updated the crtc->fb 4782 * field to reflect that the new framebuffer is now used. 4783 * Failing to do so will screw with the reference counting 4784 * on framebuffers. 4785 */ 4786 WARN_ON(crtc->primary->fb != fb); 4787 /* Unref only the old framebuffer. */ 4788 fb = NULL; 4789 } 4790 4791 out: 4792 if (fb) 4793 drm_framebuffer_unreference(fb); 4794 if (crtc->primary->old_fb) 4795 drm_framebuffer_unreference(crtc->primary->old_fb); 4796 crtc->primary->old_fb = NULL; 4797 drm_modeset_unlock_crtc(crtc); 4798 4799 return ret; 4800 } 4801 4802 /** 4803 * drm_mode_config_reset - call ->reset callbacks 4804 * @dev: drm device 4805 * 4806 * This functions calls all the crtc's, encoder's and connector's ->reset 4807 * callback. Drivers can use this in e.g. their driver load or resume code to 4808 * reset hardware and software state. 4809 */ 4810 void drm_mode_config_reset(struct drm_device *dev) 4811 { 4812 struct drm_crtc *crtc; 4813 struct drm_plane *plane; 4814 struct drm_encoder *encoder; 4815 struct drm_connector *connector; 4816 4817 list_for_each_entry(plane, &dev->mode_config.plane_list, head) 4818 if (plane->funcs->reset) 4819 plane->funcs->reset(plane); 4820 4821 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 4822 if (crtc->funcs->reset) 4823 crtc->funcs->reset(crtc); 4824 4825 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 4826 if (encoder->funcs->reset) 4827 encoder->funcs->reset(encoder); 4828 4829 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 4830 connector->status = connector_status_unknown; 4831 4832 if (connector->funcs->reset) 4833 connector->funcs->reset(connector); 4834 } 4835 } 4836 EXPORT_SYMBOL(drm_mode_config_reset); 4837 4838 /** 4839 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 4840 * @dev: DRM device 4841 * @data: ioctl data 4842 * @file_priv: DRM file info 4843 * 4844 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 4845 * TTM or something else entirely) and returns the resulting buffer handle. This 4846 * handle can then be wrapped up into a framebuffer modeset object. 4847 * 4848 * Note that userspace is not allowed to use such objects for render 4849 * acceleration - drivers must create their own private ioctls for such a use 4850 * case. 4851 * 4852 * Called by the user via ioctl. 4853 * 4854 * Returns: 4855 * Zero on success, negative errno on failure. 4856 */ 4857 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 4858 void *data, struct drm_file *file_priv) 4859 { 4860 struct drm_mode_create_dumb *args = data; 4861 u32 cpp, stride, size; 4862 4863 if (!dev->driver->dumb_create) 4864 return -ENOSYS; 4865 if (!args->width || !args->height || !args->bpp) 4866 return -EINVAL; 4867 4868 /* overflow checks for 32bit size calculations */ 4869 /* NOTE: DIV_ROUND_UP() can overflow */ 4870 cpp = DIV_ROUND_UP(args->bpp, 8); 4871 if (!cpp || cpp > 0xffffffffU / args->width) 4872 return -EINVAL; 4873 stride = cpp * args->width; 4874 if (args->height > 0xffffffffU / stride) 4875 return -EINVAL; 4876 4877 /* test for wrap-around */ 4878 size = args->height * stride; 4879 if (PAGE_ALIGN(size) == 0) 4880 return -EINVAL; 4881 4882 /* 4883 * handle, pitch and size are output parameters. Zero them out to 4884 * prevent drivers from accidentally using uninitialized data. Since 4885 * not all existing userspace is clearing these fields properly we 4886 * cannot reject IOCTL with garbage in them. 4887 */ 4888 args->handle = 0; 4889 args->pitch = 0; 4890 args->size = 0; 4891 4892 return dev->driver->dumb_create(file_priv, dev, args); 4893 } 4894 4895 /** 4896 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 4897 * @dev: DRM device 4898 * @data: ioctl data 4899 * @file_priv: DRM file info 4900 * 4901 * Allocate an offset in the drm device node's address space to be able to 4902 * memory map a dumb buffer. 4903 * 4904 * Called by the user via ioctl. 4905 * 4906 * Returns: 4907 * Zero on success, negative errno on failure. 4908 */ 4909 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 4910 void *data, struct drm_file *file_priv) 4911 { 4912 struct drm_mode_map_dumb *args = data; 4913 4914 /* call driver ioctl to get mmap offset */ 4915 if (!dev->driver->dumb_map_offset) 4916 return -ENOSYS; 4917 4918 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 4919 } 4920 4921 /** 4922 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 4923 * @dev: DRM device 4924 * @data: ioctl data 4925 * @file_priv: DRM file info 4926 * 4927 * This destroys the userspace handle for the given dumb backing storage buffer. 4928 * Since buffer objects must be reference counted in the kernel a buffer object 4929 * won't be immediately freed if a framebuffer modeset object still uses it. 4930 * 4931 * Called by the user via ioctl. 4932 * 4933 * Returns: 4934 * Zero on success, negative errno on failure. 4935 */ 4936 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 4937 void *data, struct drm_file *file_priv) 4938 { 4939 struct drm_mode_destroy_dumb *args = data; 4940 4941 if (!dev->driver->dumb_destroy) 4942 return -ENOSYS; 4943 4944 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 4945 } 4946 4947 /** 4948 * drm_fb_get_bpp_depth - get the bpp/depth values for format 4949 * @format: pixel format (DRM_FORMAT_*) 4950 * @depth: storage for the depth value 4951 * @bpp: storage for the bpp value 4952 * 4953 * This only supports RGB formats here for compat with code that doesn't use 4954 * pixel formats directly yet. 4955 */ 4956 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 4957 int *bpp) 4958 { 4959 switch (format) { 4960 case DRM_FORMAT_C8: 4961 case DRM_FORMAT_RGB332: 4962 case DRM_FORMAT_BGR233: 4963 *depth = 8; 4964 *bpp = 8; 4965 break; 4966 case DRM_FORMAT_XRGB1555: 4967 case DRM_FORMAT_XBGR1555: 4968 case DRM_FORMAT_RGBX5551: 4969 case DRM_FORMAT_BGRX5551: 4970 case DRM_FORMAT_ARGB1555: 4971 case DRM_FORMAT_ABGR1555: 4972 case DRM_FORMAT_RGBA5551: 4973 case DRM_FORMAT_BGRA5551: 4974 *depth = 15; 4975 *bpp = 16; 4976 break; 4977 case DRM_FORMAT_RGB565: 4978 case DRM_FORMAT_BGR565: 4979 *depth = 16; 4980 *bpp = 16; 4981 break; 4982 case DRM_FORMAT_RGB888: 4983 case DRM_FORMAT_BGR888: 4984 *depth = 24; 4985 *bpp = 24; 4986 break; 4987 case DRM_FORMAT_XRGB8888: 4988 case DRM_FORMAT_XBGR8888: 4989 case DRM_FORMAT_RGBX8888: 4990 case DRM_FORMAT_BGRX8888: 4991 *depth = 24; 4992 *bpp = 32; 4993 break; 4994 case DRM_FORMAT_XRGB2101010: 4995 case DRM_FORMAT_XBGR2101010: 4996 case DRM_FORMAT_RGBX1010102: 4997 case DRM_FORMAT_BGRX1010102: 4998 case DRM_FORMAT_ARGB2101010: 4999 case DRM_FORMAT_ABGR2101010: 5000 case DRM_FORMAT_RGBA1010102: 5001 case DRM_FORMAT_BGRA1010102: 5002 *depth = 30; 5003 *bpp = 32; 5004 break; 5005 case DRM_FORMAT_ARGB8888: 5006 case DRM_FORMAT_ABGR8888: 5007 case DRM_FORMAT_RGBA8888: 5008 case DRM_FORMAT_BGRA8888: 5009 *depth = 32; 5010 *bpp = 32; 5011 break; 5012 default: 5013 DRM_DEBUG_KMS("unsupported pixel format %s\n", 5014 drm_get_format_name(format)); 5015 *depth = 0; 5016 *bpp = 0; 5017 break; 5018 } 5019 } 5020 EXPORT_SYMBOL(drm_fb_get_bpp_depth); 5021 5022 /** 5023 * drm_format_num_planes - get the number of planes for format 5024 * @format: pixel format (DRM_FORMAT_*) 5025 * 5026 * Returns: 5027 * The number of planes used by the specified pixel format. 5028 */ 5029 int drm_format_num_planes(uint32_t format) 5030 { 5031 switch (format) { 5032 case DRM_FORMAT_YUV410: 5033 case DRM_FORMAT_YVU410: 5034 case DRM_FORMAT_YUV411: 5035 case DRM_FORMAT_YVU411: 5036 case DRM_FORMAT_YUV420: 5037 case DRM_FORMAT_YVU420: 5038 case DRM_FORMAT_YUV422: 5039 case DRM_FORMAT_YVU422: 5040 case DRM_FORMAT_YUV444: 5041 case DRM_FORMAT_YVU444: 5042 return 3; 5043 case DRM_FORMAT_NV12: 5044 case DRM_FORMAT_NV21: 5045 case DRM_FORMAT_NV16: 5046 case DRM_FORMAT_NV61: 5047 case DRM_FORMAT_NV24: 5048 case DRM_FORMAT_NV42: 5049 return 2; 5050 default: 5051 return 1; 5052 } 5053 } 5054 EXPORT_SYMBOL(drm_format_num_planes); 5055 5056 /** 5057 * drm_format_plane_cpp - determine the bytes per pixel value 5058 * @format: pixel format (DRM_FORMAT_*) 5059 * @plane: plane index 5060 * 5061 * Returns: 5062 * The bytes per pixel value for the specified plane. 5063 */ 5064 int drm_format_plane_cpp(uint32_t format, int plane) 5065 { 5066 unsigned int depth; 5067 int bpp; 5068 5069 if (plane >= drm_format_num_planes(format)) 5070 return 0; 5071 5072 switch (format) { 5073 case DRM_FORMAT_YUYV: 5074 case DRM_FORMAT_YVYU: 5075 case DRM_FORMAT_UYVY: 5076 case DRM_FORMAT_VYUY: 5077 return 2; 5078 case DRM_FORMAT_NV12: 5079 case DRM_FORMAT_NV21: 5080 case DRM_FORMAT_NV16: 5081 case DRM_FORMAT_NV61: 5082 case DRM_FORMAT_NV24: 5083 case DRM_FORMAT_NV42: 5084 return plane ? 2 : 1; 5085 case DRM_FORMAT_YUV410: 5086 case DRM_FORMAT_YVU410: 5087 case DRM_FORMAT_YUV411: 5088 case DRM_FORMAT_YVU411: 5089 case DRM_FORMAT_YUV420: 5090 case DRM_FORMAT_YVU420: 5091 case DRM_FORMAT_YUV422: 5092 case DRM_FORMAT_YVU422: 5093 case DRM_FORMAT_YUV444: 5094 case DRM_FORMAT_YVU444: 5095 return 1; 5096 default: 5097 drm_fb_get_bpp_depth(format, &depth, &bpp); 5098 return bpp >> 3; 5099 } 5100 } 5101 EXPORT_SYMBOL(drm_format_plane_cpp); 5102 5103 /** 5104 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 5105 * @format: pixel format (DRM_FORMAT_*) 5106 * 5107 * Returns: 5108 * The horizontal chroma subsampling factor for the 5109 * specified pixel format. 5110 */ 5111 int drm_format_horz_chroma_subsampling(uint32_t format) 5112 { 5113 switch (format) { 5114 case DRM_FORMAT_YUV411: 5115 case DRM_FORMAT_YVU411: 5116 case DRM_FORMAT_YUV410: 5117 case DRM_FORMAT_YVU410: 5118 return 4; 5119 case DRM_FORMAT_YUYV: 5120 case DRM_FORMAT_YVYU: 5121 case DRM_FORMAT_UYVY: 5122 case DRM_FORMAT_VYUY: 5123 case DRM_FORMAT_NV12: 5124 case DRM_FORMAT_NV21: 5125 case DRM_FORMAT_NV16: 5126 case DRM_FORMAT_NV61: 5127 case DRM_FORMAT_YUV422: 5128 case DRM_FORMAT_YVU422: 5129 case DRM_FORMAT_YUV420: 5130 case DRM_FORMAT_YVU420: 5131 return 2; 5132 default: 5133 return 1; 5134 } 5135 } 5136 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5137 5138 /** 5139 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5140 * @format: pixel format (DRM_FORMAT_*) 5141 * 5142 * Returns: 5143 * The vertical chroma subsampling factor for the 5144 * specified pixel format. 5145 */ 5146 int drm_format_vert_chroma_subsampling(uint32_t format) 5147 { 5148 switch (format) { 5149 case DRM_FORMAT_YUV410: 5150 case DRM_FORMAT_YVU410: 5151 return 4; 5152 case DRM_FORMAT_YUV420: 5153 case DRM_FORMAT_YVU420: 5154 case DRM_FORMAT_NV12: 5155 case DRM_FORMAT_NV21: 5156 return 2; 5157 default: 5158 return 1; 5159 } 5160 } 5161 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5162 5163 /** 5164 * drm_rotation_simplify() - Try to simplify the rotation 5165 * @rotation: Rotation to be simplified 5166 * @supported_rotations: Supported rotations 5167 * 5168 * Attempt to simplify the rotation to a form that is supported. 5169 * Eg. if the hardware supports everything except DRM_REFLECT_X 5170 * one could call this function like this: 5171 * 5172 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5173 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5174 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5175 * 5176 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5177 * transforms the hardware supports, this function may not 5178 * be able to produce a supported transform, so the caller should 5179 * check the result afterwards. 5180 */ 5181 unsigned int drm_rotation_simplify(unsigned int rotation, 5182 unsigned int supported_rotations) 5183 { 5184 if (rotation & ~supported_rotations) { 5185 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5186 rotation = (rotation & ~0xf) | BIT((ffs(rotation & 0xf) + 1) % 4); 5187 } 5188 5189 return rotation; 5190 } 5191 EXPORT_SYMBOL(drm_rotation_simplify); 5192 5193 /** 5194 * drm_mode_config_init - initialize DRM mode_configuration structure 5195 * @dev: DRM device 5196 * 5197 * Initialize @dev's mode_config structure, used for tracking the graphics 5198 * configuration of @dev. 5199 * 5200 * Since this initializes the modeset locks, no locking is possible. Which is no 5201 * problem, since this should happen single threaded at init time. It is the 5202 * driver's problem to ensure this guarantee. 5203 * 5204 */ 5205 void drm_mode_config_init(struct drm_device *dev) 5206 { 5207 mutex_init(&dev->mode_config.mutex); 5208 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5209 mutex_init(&dev->mode_config.idr_mutex); 5210 mutex_init(&dev->mode_config.fb_lock); 5211 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5212 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5213 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5214 INIT_LIST_HEAD(&dev->mode_config.bridge_list); 5215 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5216 INIT_LIST_HEAD(&dev->mode_config.property_list); 5217 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5218 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5219 idr_init(&dev->mode_config.crtc_idr); 5220 idr_init(&dev->mode_config.tile_idr); 5221 5222 drm_modeset_lock_all(dev); 5223 drm_mode_create_standard_connector_properties(dev); 5224 drm_mode_create_standard_plane_properties(dev); 5225 drm_modeset_unlock_all(dev); 5226 5227 /* Just to be sure */ 5228 dev->mode_config.num_fb = 0; 5229 dev->mode_config.num_connector = 0; 5230 dev->mode_config.num_crtc = 0; 5231 dev->mode_config.num_encoder = 0; 5232 dev->mode_config.num_overlay_plane = 0; 5233 dev->mode_config.num_total_plane = 0; 5234 } 5235 EXPORT_SYMBOL(drm_mode_config_init); 5236 5237 /** 5238 * drm_mode_config_cleanup - free up DRM mode_config info 5239 * @dev: DRM device 5240 * 5241 * Free up all the connectors and CRTCs associated with this DRM device, then 5242 * free up the framebuffers and associated buffer objects. 5243 * 5244 * Note that since this /should/ happen single-threaded at driver/device 5245 * teardown time, no locking is required. It's the driver's job to ensure that 5246 * this guarantee actually holds true. 5247 * 5248 * FIXME: cleanup any dangling user buffer objects too 5249 */ 5250 void drm_mode_config_cleanup(struct drm_device *dev) 5251 { 5252 struct drm_connector *connector, *ot; 5253 struct drm_crtc *crtc, *ct; 5254 struct drm_encoder *encoder, *enct; 5255 struct drm_bridge *bridge, *brt; 5256 struct drm_framebuffer *fb, *fbt; 5257 struct drm_property *property, *pt; 5258 struct drm_property_blob *blob, *bt; 5259 struct drm_plane *plane, *plt; 5260 5261 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5262 head) { 5263 encoder->funcs->destroy(encoder); 5264 } 5265 5266 list_for_each_entry_safe(bridge, brt, 5267 &dev->mode_config.bridge_list, head) { 5268 bridge->funcs->destroy(bridge); 5269 } 5270 5271 list_for_each_entry_safe(connector, ot, 5272 &dev->mode_config.connector_list, head) { 5273 connector->funcs->destroy(connector); 5274 } 5275 5276 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5277 head) { 5278 drm_property_destroy(dev, property); 5279 } 5280 5281 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5282 head) { 5283 drm_property_destroy_blob(dev, blob); 5284 } 5285 5286 /* 5287 * Single-threaded teardown context, so it's not required to grab the 5288 * fb_lock to protect against concurrent fb_list access. Contrary, it 5289 * would actually deadlock with the drm_framebuffer_cleanup function. 5290 * 5291 * Also, if there are any framebuffers left, that's a driver leak now, 5292 * so politely WARN about this. 5293 */ 5294 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5295 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5296 drm_framebuffer_remove(fb); 5297 } 5298 5299 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5300 head) { 5301 plane->funcs->destroy(plane); 5302 } 5303 5304 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5305 crtc->funcs->destroy(crtc); 5306 } 5307 5308 idr_destroy(&dev->mode_config.tile_idr); 5309 idr_destroy(&dev->mode_config.crtc_idr); 5310 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5311 } 5312 EXPORT_SYMBOL(drm_mode_config_cleanup); 5313 5314 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5315 unsigned int supported_rotations) 5316 { 5317 static const struct drm_prop_enum_list props[] = { 5318 { DRM_ROTATE_0, "rotate-0" }, 5319 { DRM_ROTATE_90, "rotate-90" }, 5320 { DRM_ROTATE_180, "rotate-180" }, 5321 { DRM_ROTATE_270, "rotate-270" }, 5322 { DRM_REFLECT_X, "reflect-x" }, 5323 { DRM_REFLECT_Y, "reflect-y" }, 5324 }; 5325 5326 return drm_property_create_bitmask(dev, 0, "rotation", 5327 props, ARRAY_SIZE(props), 5328 supported_rotations); 5329 } 5330 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5331 5332 /** 5333 * DOC: Tile group 5334 * 5335 * Tile groups are used to represent tiled monitors with a unique 5336 * integer identifier. Tiled monitors using DisplayID v1.3 have 5337 * a unique 8-byte handle, we store this in a tile group, so we 5338 * have a common identifier for all tiles in a monitor group. 5339 */ 5340 static void drm_tile_group_free(struct kref *kref) 5341 { 5342 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5343 struct drm_device *dev = tg->dev; 5344 mutex_lock(&dev->mode_config.idr_mutex); 5345 idr_remove(&dev->mode_config.tile_idr, tg->id); 5346 mutex_unlock(&dev->mode_config.idr_mutex); 5347 kfree(tg); 5348 } 5349 5350 /** 5351 * drm_mode_put_tile_group - drop a reference to a tile group. 5352 * @dev: DRM device 5353 * @tg: tile group to drop reference to. 5354 * 5355 * drop reference to tile group and free if 0. 5356 */ 5357 void drm_mode_put_tile_group(struct drm_device *dev, 5358 struct drm_tile_group *tg) 5359 { 5360 kref_put(&tg->refcount, drm_tile_group_free); 5361 } 5362 5363 /** 5364 * drm_mode_get_tile_group - get a reference to an existing tile group 5365 * @dev: DRM device 5366 * @topology: 8-bytes unique per monitor. 5367 * 5368 * Use the unique bytes to get a reference to an existing tile group. 5369 * 5370 * RETURNS: 5371 * tile group or NULL if not found. 5372 */ 5373 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 5374 char topology[8]) 5375 { 5376 struct drm_tile_group *tg; 5377 int id; 5378 mutex_lock(&dev->mode_config.idr_mutex); 5379 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 5380 if (!memcmp(tg->group_data, topology, 8)) { 5381 if (!kref_get_unless_zero(&tg->refcount)) 5382 tg = NULL; 5383 mutex_unlock(&dev->mode_config.idr_mutex); 5384 return tg; 5385 } 5386 } 5387 mutex_unlock(&dev->mode_config.idr_mutex); 5388 return NULL; 5389 } 5390 5391 /** 5392 * drm_mode_create_tile_group - create a tile group from a displayid description 5393 * @dev: DRM device 5394 * @topology: 8-bytes unique per monitor. 5395 * 5396 * Create a tile group for the unique monitor, and get a unique 5397 * identifier for the tile group. 5398 * 5399 * RETURNS: 5400 * new tile group or error. 5401 */ 5402 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 5403 char topology[8]) 5404 { 5405 struct drm_tile_group *tg; 5406 int ret; 5407 5408 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 5409 if (!tg) 5410 return ERR_PTR(-ENOMEM); 5411 5412 kref_init(&tg->refcount); 5413 memcpy(tg->group_data, topology, 8); 5414 tg->dev = dev; 5415 5416 mutex_lock(&dev->mode_config.idr_mutex); 5417 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 5418 if (ret >= 0) { 5419 tg->id = ret; 5420 } else { 5421 kfree(tg); 5422 tg = ERR_PTR(ret); 5423 } 5424 5425 mutex_unlock(&dev->mode_config.idr_mutex); 5426 return tg; 5427 } 5428