1 /* 2 * Copyright (c) 2006-2008 Intel Corporation 3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 4 * Copyright (c) 2008 Red Hat Inc. 5 * 6 * DRM core CRTC related functions 7 * 8 * Permission to use, copy, modify, distribute, and sell this software and its 9 * documentation for any purpose is hereby granted without fee, provided that 10 * the above copyright notice appear in all copies and that both that copyright 11 * notice and this permission notice appear in supporting documentation, and 12 * that the name of the copyright holders not be used in advertising or 13 * publicity pertaining to distribution of the software without specific, 14 * written prior permission. The copyright holders make no representations 15 * about the suitability of this software for any purpose. It is provided "as 16 * is" without express or implied warranty. 17 * 18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 24 * OF THIS SOFTWARE. 25 * 26 * Authors: 27 * Keith Packard 28 * Eric Anholt <eric@anholt.net> 29 * Dave Airlie <airlied@linux.ie> 30 * Jesse Barnes <jesse.barnes@intel.com> 31 */ 32 #include <linux/ctype.h> 33 #include <linux/list.h> 34 #include <linux/export.h> 35 #include <drm/drmP.h> 36 #include <drm/drm_crtc.h> 37 #include <drm/drm_edid.h> 38 #include <uapi_drm/drm_fourcc.h> 39 #include <linux/slab.h> 40 #include <drm/drm_modeset_lock.h> 41 #include <drm/drm_atomic.h> 42 43 #include "drm_crtc_internal.h" 44 #include "drm_internal.h" 45 46 static struct drm_framebuffer * 47 internal_framebuffer_create(struct drm_device *dev, 48 const struct drm_mode_fb_cmd2 *r, 49 struct drm_file *file_priv); 50 51 /* Avoid boilerplate. I'm tired of typing. */ 52 #define DRM_ENUM_NAME_FN(fnname, list) \ 53 const char *fnname(int val) \ 54 { \ 55 int i; \ 56 for (i = 0; i < ARRAY_SIZE(list); i++) { \ 57 if (list[i].type == val) \ 58 return list[i].name; \ 59 } \ 60 return "(unknown)"; \ 61 } 62 63 /* 64 * Global properties 65 */ 66 static const struct drm_prop_enum_list drm_dpms_enum_list[] = { 67 { DRM_MODE_DPMS_ON, "On" }, 68 { DRM_MODE_DPMS_STANDBY, "Standby" }, 69 { DRM_MODE_DPMS_SUSPEND, "Suspend" }, 70 { DRM_MODE_DPMS_OFF, "Off" } 71 }; 72 73 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) 74 75 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { 76 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 77 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 78 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 79 }; 80 81 /* 82 * Optional properties 83 */ 84 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { 85 { DRM_MODE_SCALE_NONE, "None" }, 86 { DRM_MODE_SCALE_FULLSCREEN, "Full" }, 87 { DRM_MODE_SCALE_CENTER, "Center" }, 88 { DRM_MODE_SCALE_ASPECT, "Full aspect" }, 89 }; 90 91 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { 92 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, 93 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, 94 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, 95 }; 96 97 /* 98 * Non-global properties, but "required" for certain connectors. 99 */ 100 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { 101 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 102 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 103 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 104 }; 105 106 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) 107 108 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { 109 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 110 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 111 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 112 }; 113 114 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, 115 drm_dvi_i_subconnector_enum_list) 116 117 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { 118 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 119 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 120 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 121 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 122 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 123 }; 124 125 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) 126 127 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { 128 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 129 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 130 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 131 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 132 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 133 }; 134 135 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, 136 drm_tv_subconnector_enum_list) 137 138 static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = { 139 { DRM_MODE_DIRTY_OFF, "Off" }, 140 { DRM_MODE_DIRTY_ON, "On" }, 141 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" }, 142 }; 143 144 struct drm_conn_prop_enum_list { 145 int type; 146 const char *name; 147 int count; 148 }; 149 150 /* 151 * Connector and encoder types. 152 */ 153 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { 154 { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, 155 { DRM_MODE_CONNECTOR_VGA, "VGA" }, 156 { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, 157 { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, 158 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, 159 { DRM_MODE_CONNECTOR_Composite, "Composite" }, 160 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, 161 { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, 162 { DRM_MODE_CONNECTOR_Component, "Component" }, 163 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, 164 { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, 165 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, 166 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, 167 { DRM_MODE_CONNECTOR_TV, "TV" }, 168 { DRM_MODE_CONNECTOR_eDP, "eDP" }, 169 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, 170 { DRM_MODE_CONNECTOR_DSI, "DSI" }, 171 }; 172 173 static const struct drm_prop_enum_list drm_encoder_enum_list[] = { 174 { DRM_MODE_ENCODER_NONE, "None" }, 175 { DRM_MODE_ENCODER_DAC, "DAC" }, 176 { DRM_MODE_ENCODER_TMDS, "TMDS" }, 177 { DRM_MODE_ENCODER_LVDS, "LVDS" }, 178 { DRM_MODE_ENCODER_TVDAC, "TV" }, 179 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" }, 180 { DRM_MODE_ENCODER_DSI, "DSI" }, 181 { DRM_MODE_ENCODER_DPMST, "DP MST" }, 182 }; 183 184 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { 185 { SubPixelUnknown, "Unknown" }, 186 { SubPixelHorizontalRGB, "Horizontal RGB" }, 187 { SubPixelHorizontalBGR, "Horizontal BGR" }, 188 { SubPixelVerticalRGB, "Vertical RGB" }, 189 { SubPixelVerticalBGR, "Vertical BGR" }, 190 { SubPixelNone, "None" }, 191 }; 192 193 void drm_connector_ida_init(void) 194 { 195 #if 0 196 int i; 197 198 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 199 ida_init(&drm_connector_enum_list[i].ida); 200 #endif 201 } 202 203 void drm_connector_ida_destroy(void) 204 { 205 #if 0 206 int i; 207 208 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 209 ida_destroy(&drm_connector_enum_list[i].ida); 210 #endif 211 } 212 213 /** 214 * drm_get_connector_status_name - return a string for connector status 215 * @status: connector status to compute name of 216 * 217 * In contrast to the other drm_get_*_name functions this one here returns a 218 * const pointer and hence is threadsafe. 219 */ 220 const char *drm_get_connector_status_name(enum drm_connector_status status) 221 { 222 if (status == connector_status_connected) 223 return "connected"; 224 else if (status == connector_status_disconnected) 225 return "disconnected"; 226 else 227 return "unknown"; 228 } 229 EXPORT_SYMBOL(drm_get_connector_status_name); 230 231 /** 232 * drm_get_subpixel_order_name - return a string for a given subpixel enum 233 * @order: enum of subpixel_order 234 * 235 * Note you could abuse this and return something out of bounds, but that 236 * would be a caller error. No unscrubbed user data should make it here. 237 */ 238 const char *drm_get_subpixel_order_name(enum subpixel_order order) 239 { 240 return drm_subpixel_enum_list[order].name; 241 } 242 EXPORT_SYMBOL(drm_get_subpixel_order_name); 243 244 static char printable_char(int c) 245 { 246 return isascii(c) && isprint(c) ? c : '?'; 247 } 248 249 /** 250 * drm_get_format_name - return a string for drm fourcc format 251 * @format: format to compute name of 252 * 253 * Note that the buffer used by this function is globally shared and owned by 254 * the function itself. 255 * 256 * FIXME: This isn't really multithreading safe. 257 */ 258 const char *drm_get_format_name(uint32_t format) 259 { 260 static char buf[32]; 261 262 ksnprintf(buf, sizeof(buf), 263 "%c%c%c%c %s-endian (0x%08x)", 264 printable_char(format & 0xff), 265 printable_char((format >> 8) & 0xff), 266 printable_char((format >> 16) & 0xff), 267 printable_char((format >> 24) & 0x7f), 268 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", 269 format); 270 271 return buf; 272 } 273 EXPORT_SYMBOL(drm_get_format_name); 274 275 /* 276 * Internal function to assign a slot in the object idr and optionally 277 * register the object into the idr. 278 */ 279 static int drm_mode_object_get_reg(struct drm_device *dev, 280 struct drm_mode_object *obj, 281 uint32_t obj_type, 282 bool register_obj) 283 { 284 int ret; 285 286 mutex_lock(&dev->mode_config.idr_mutex); 287 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); 288 if (ret >= 0) { 289 /* 290 * Set up the object linking under the protection of the idr 291 * lock so that other users can't see inconsistent state. 292 */ 293 obj->id = ret; 294 obj->type = obj_type; 295 } 296 mutex_unlock(&dev->mode_config.idr_mutex); 297 298 return ret < 0 ? ret : 0; 299 } 300 301 /** 302 * drm_mode_object_get - allocate a new modeset identifier 303 * @dev: DRM device 304 * @obj: object pointer, used to generate unique ID 305 * @obj_type: object type 306 * 307 * Create a unique identifier based on @ptr in @dev's identifier space. Used 308 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix 309 * modeset identifiers are _not_ reference counted. Hence don't use this for 310 * reference counted modeset objects like framebuffers. 311 * 312 * Returns: 313 * Zero on success, error code on failure. 314 */ 315 int drm_mode_object_get(struct drm_device *dev, 316 struct drm_mode_object *obj, uint32_t obj_type) 317 { 318 return drm_mode_object_get_reg(dev, obj, obj_type, true); 319 } 320 321 static void drm_mode_object_register(struct drm_device *dev, 322 struct drm_mode_object *obj) 323 { 324 mutex_lock(&dev->mode_config.idr_mutex); 325 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); 326 mutex_unlock(&dev->mode_config.idr_mutex); 327 } 328 329 /** 330 * drm_mode_object_put - free a modeset identifer 331 * @dev: DRM device 332 * @object: object to free 333 * 334 * Free @id from @dev's unique identifier pool. Note that despite the _get 335 * postfix modeset identifiers are _not_ reference counted. Hence don't use this 336 * for reference counted modeset objects like framebuffers. 337 */ 338 void drm_mode_object_put(struct drm_device *dev, 339 struct drm_mode_object *object) 340 { 341 mutex_lock(&dev->mode_config.idr_mutex); 342 idr_remove(&dev->mode_config.crtc_idr, object->id); 343 mutex_unlock(&dev->mode_config.idr_mutex); 344 } 345 346 static struct drm_mode_object *_object_find(struct drm_device *dev, 347 uint32_t id, uint32_t type) 348 { 349 struct drm_mode_object *obj = NULL; 350 351 mutex_lock(&dev->mode_config.idr_mutex); 352 obj = idr_find(&dev->mode_config.crtc_idr, id); 353 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) 354 obj = NULL; 355 if (obj && obj->id != id) 356 obj = NULL; 357 /* don't leak out unref'd fb's */ 358 if (obj && 359 (obj->type == DRM_MODE_OBJECT_FB || 360 obj->type == DRM_MODE_OBJECT_BLOB)) 361 obj = NULL; 362 mutex_unlock(&dev->mode_config.idr_mutex); 363 364 return obj; 365 } 366 367 /** 368 * drm_mode_object_find - look up a drm object with static lifetime 369 * @dev: drm device 370 * @id: id of the mode object 371 * @type: type of the mode object 372 * 373 * Note that framebuffers cannot be looked up with this functions - since those 374 * are reference counted, they need special treatment. Even with 375 * DRM_MODE_OBJECT_ANY (although that will simply return NULL 376 * rather than WARN_ON()). 377 */ 378 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, 379 uint32_t id, uint32_t type) 380 { 381 struct drm_mode_object *obj = NULL; 382 383 /* Framebuffers are reference counted and need their own lookup 384 * function.*/ 385 WARN_ON(type == DRM_MODE_OBJECT_FB || type == DRM_MODE_OBJECT_BLOB); 386 obj = _object_find(dev, id, type); 387 return obj; 388 } 389 EXPORT_SYMBOL(drm_mode_object_find); 390 391 /** 392 * drm_framebuffer_init - initialize a framebuffer 393 * @dev: DRM device 394 * @fb: framebuffer to be initialized 395 * @funcs: ... with these functions 396 * 397 * Allocates an ID for the framebuffer's parent mode object, sets its mode 398 * functions & device file and adds it to the master fd list. 399 * 400 * IMPORTANT: 401 * This functions publishes the fb and makes it available for concurrent access 402 * by other users. Which means by this point the fb _must_ be fully set up - 403 * since all the fb attributes are invariant over its lifetime, no further 404 * locking but only correct reference counting is required. 405 * 406 * Returns: 407 * Zero on success, error code on failure. 408 */ 409 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, 410 const struct drm_framebuffer_funcs *funcs) 411 { 412 int ret; 413 414 mutex_lock(&dev->mode_config.fb_lock); 415 kref_init(&fb->refcount); 416 INIT_LIST_HEAD(&fb->filp_head); 417 fb->dev = dev; 418 fb->funcs = funcs; 419 420 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB); 421 if (ret) 422 goto out; 423 424 dev->mode_config.num_fb++; 425 list_add(&fb->head, &dev->mode_config.fb_list); 426 out: 427 mutex_unlock(&dev->mode_config.fb_lock); 428 429 return ret; 430 } 431 EXPORT_SYMBOL(drm_framebuffer_init); 432 433 /* dev->mode_config.fb_lock must be held! */ 434 static void __drm_framebuffer_unregister(struct drm_device *dev, 435 struct drm_framebuffer *fb) 436 { 437 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 /** 534 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr 535 * @fb: fb to unregister 536 * 537 * Drivers need to call this when cleaning up driver-private framebuffers, e.g. 538 * those used for fbdev. Note that the caller must hold a reference of it's own, 539 * i.e. the object may not be destroyed through this call (since it'll lead to a 540 * locking inversion). 541 */ 542 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) 543 { 544 struct drm_device *dev; 545 546 if (!fb) 547 return; 548 549 dev = fb->dev; 550 551 mutex_lock(&dev->mode_config.fb_lock); 552 /* Mark fb as reaped and drop idr ref. */ 553 __drm_framebuffer_unregister(dev, fb); 554 mutex_unlock(&dev->mode_config.fb_lock); 555 } 556 EXPORT_SYMBOL(drm_framebuffer_unregister_private); 557 558 /** 559 * drm_framebuffer_cleanup - remove a framebuffer object 560 * @fb: framebuffer to remove 561 * 562 * Cleanup framebuffer. This function is intended to be used from the drivers 563 * ->destroy callback. It can also be used to clean up driver private 564 * framebuffers embedded into a larger structure. 565 * 566 * Note that this function does not remove the fb from active usuage - if it is 567 * still used anywhere, hilarity can ensue since userspace could call getfb on 568 * the id and get back -EINVAL. Obviously no concern at driver unload time. 569 * 570 * Also, the framebuffer will not be removed from the lookup idr - for 571 * user-created framebuffers this will happen in in the rmfb ioctl. For 572 * driver-private objects (e.g. for fbdev) drivers need to explicitly call 573 * drm_framebuffer_unregister_private. 574 */ 575 void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 576 { 577 struct drm_device *dev = fb->dev; 578 579 mutex_lock(&dev->mode_config.fb_lock); 580 list_del(&fb->head); 581 dev->mode_config.num_fb--; 582 mutex_unlock(&dev->mode_config.fb_lock); 583 } 584 EXPORT_SYMBOL(drm_framebuffer_cleanup); 585 586 /** 587 * drm_framebuffer_remove - remove and unreference a framebuffer object 588 * @fb: framebuffer to remove 589 * 590 * Scans all the CRTCs and planes in @dev's mode_config. If they're 591 * using @fb, removes it, setting it to NULL. Then drops the reference to the 592 * passed-in framebuffer. Might take the modeset locks. 593 * 594 * Note that this function optimizes the cleanup away if the caller holds the 595 * last reference to the framebuffer. It is also guaranteed to not take the 596 * modeset locks in this case. 597 */ 598 void drm_framebuffer_remove(struct drm_framebuffer *fb) 599 { 600 struct drm_device *dev; 601 struct drm_crtc *crtc; 602 struct drm_plane *plane; 603 struct drm_mode_set set; 604 int ret; 605 606 if (!fb) 607 return; 608 609 dev = fb->dev; 610 611 WARN_ON(!list_empty(&fb->filp_head)); 612 613 /* 614 * drm ABI mandates that we remove any deleted framebuffers from active 615 * useage. But since most sane clients only remove framebuffers they no 616 * longer need, try to optimize this away. 617 * 618 * Since we're holding a reference ourselves, observing a refcount of 1 619 * means that we're the last holder and can skip it. Also, the refcount 620 * can never increase from 1 again, so we don't need any barriers or 621 * locks. 622 * 623 * Note that userspace could try to race with use and instate a new 624 * usage _after_ we've cleared all current ones. End result will be an 625 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot 626 * in this manner. 627 */ 628 if (atomic_read(&fb->refcount.refcount) > 1) { 629 drm_modeset_lock_all(dev); 630 /* remove from any CRTC */ 631 drm_for_each_crtc(crtc, dev) { 632 if (crtc->primary->fb == fb) { 633 /* should turn off the crtc */ 634 memset(&set, 0, sizeof(struct drm_mode_set)); 635 set.crtc = crtc; 636 set.fb = NULL; 637 ret = drm_mode_set_config_internal(&set); 638 if (ret) 639 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); 640 } 641 } 642 643 drm_for_each_plane(plane, dev) { 644 if (plane->fb == fb) 645 drm_plane_force_disable(plane); 646 } 647 drm_modeset_unlock_all(dev); 648 } 649 650 drm_framebuffer_unreference(fb); 651 } 652 EXPORT_SYMBOL(drm_framebuffer_remove); 653 654 DEFINE_WW_CLASS(crtc_ww_class); 655 656 static unsigned int drm_num_crtcs(struct drm_device *dev) 657 { 658 unsigned int num = 0; 659 struct drm_crtc *tmp; 660 661 drm_for_each_crtc(tmp, dev) { 662 num++; 663 } 664 665 return num; 666 } 667 668 /** 669 * drm_crtc_init_with_planes - Initialise a new CRTC object with 670 * specified primary and cursor planes. 671 * @dev: DRM device 672 * @crtc: CRTC object to init 673 * @primary: Primary plane for CRTC 674 * @cursor: Cursor plane for CRTC 675 * @funcs: callbacks for the new CRTC 676 * @name: printf style format string for the CRTC name, or NULL for default name 677 * 678 * Inits a new object created as base part of a driver crtc object. 679 * 680 * Returns: 681 * Zero on success, error code on failure. 682 */ 683 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 684 struct drm_plane *primary, 685 struct drm_plane *cursor, 686 const struct drm_crtc_funcs *funcs, 687 const char *name, ...) 688 { 689 struct drm_mode_config *config = &dev->mode_config; 690 int ret; 691 692 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); 693 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); 694 695 crtc->dev = dev; 696 crtc->funcs = funcs; 697 698 drm_modeset_lock_init(&crtc->mutex); 699 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 700 if (ret) 701 return ret; 702 703 if (name) { 704 __va_list ap; 705 706 __va_start(ap, name); 707 crtc->name = kvasprintf(GFP_KERNEL, name, ap); 708 __va_end(ap); 709 } else { 710 crtc->name = kasprintf(GFP_KERNEL, "crtc-%d", 711 drm_num_crtcs(dev)); 712 } 713 if (!crtc->name) { 714 drm_mode_object_put(dev, &crtc->base); 715 return -ENOMEM; 716 } 717 718 crtc->base.properties = &crtc->properties; 719 720 list_add_tail(&crtc->head, &config->crtc_list); 721 config->num_crtc++; 722 723 crtc->primary = primary; 724 crtc->cursor = cursor; 725 if (primary) 726 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 727 if (cursor) 728 cursor->possible_crtcs = 1 << drm_crtc_index(crtc); 729 730 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 731 drm_object_attach_property(&crtc->base, config->prop_active, 0); 732 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); 733 } 734 735 return 0; 736 } 737 EXPORT_SYMBOL(drm_crtc_init_with_planes); 738 739 /** 740 * drm_crtc_cleanup - Clean up the core crtc usage 741 * @crtc: CRTC to cleanup 742 * 743 * This function cleans up @crtc and removes it from the DRM mode setting 744 * core. Note that the function does *not* free the crtc structure itself, 745 * this is the responsibility of the caller. 746 */ 747 void drm_crtc_cleanup(struct drm_crtc *crtc) 748 { 749 struct drm_device *dev = crtc->dev; 750 751 kfree(crtc->gamma_store); 752 crtc->gamma_store = NULL; 753 754 drm_modeset_lock_fini(&crtc->mutex); 755 756 drm_mode_object_put(dev, &crtc->base); 757 list_del(&crtc->head); 758 dev->mode_config.num_crtc--; 759 760 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); 761 if (crtc->state && crtc->funcs->atomic_destroy_state) 762 crtc->funcs->atomic_destroy_state(crtc, crtc->state); 763 764 kfree(crtc->name); 765 766 memset(crtc, 0, sizeof(*crtc)); 767 } 768 EXPORT_SYMBOL(drm_crtc_cleanup); 769 770 /** 771 * drm_crtc_index - find the index of a registered CRTC 772 * @crtc: CRTC to find index for 773 * 774 * Given a registered CRTC, return the index of that CRTC within a DRM 775 * device's list of CRTCs. 776 */ 777 unsigned int drm_crtc_index(struct drm_crtc *crtc) 778 { 779 unsigned int index = 0; 780 struct drm_crtc *tmp; 781 782 drm_for_each_crtc(tmp, crtc->dev) { 783 if (tmp == crtc) 784 return index; 785 786 index++; 787 } 788 789 BUG(); 790 } 791 EXPORT_SYMBOL(drm_crtc_index); 792 793 /* 794 * drm_mode_remove - remove and free a mode 795 * @connector: connector list to modify 796 * @mode: mode to remove 797 * 798 * Remove @mode from @connector's mode list, then free it. 799 */ 800 static void drm_mode_remove(struct drm_connector *connector, 801 struct drm_display_mode *mode) 802 { 803 list_del(&mode->head); 804 drm_mode_destroy(connector->dev, mode); 805 } 806 807 /** 808 * drm_display_info_set_bus_formats - set the supported bus formats 809 * @info: display info to store bus formats in 810 * @fmts: array containing the supported bus formats 811 * @nfmts: the number of entries in the fmts array 812 * 813 * Store the supported bus formats in display info structure. 814 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for 815 * a full list of available formats. 816 */ 817 int drm_display_info_set_bus_formats(struct drm_display_info *info, 818 const u32 *formats, 819 unsigned int num_formats) 820 { 821 u32 *fmts = NULL; 822 823 if (!formats && num_formats) 824 return -EINVAL; 825 826 if (formats && num_formats) { 827 fmts = kmemdup(formats, sizeof(*formats) * num_formats, 828 GFP_KERNEL); 829 if (!fmts) 830 return -ENOMEM; 831 } 832 833 kfree(info->bus_formats); 834 info->bus_formats = fmts; 835 info->num_bus_formats = num_formats; 836 837 return 0; 838 } 839 EXPORT_SYMBOL(drm_display_info_set_bus_formats); 840 841 /** 842 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 843 * @connector: connector to quwery 844 * 845 * The kernel supports per-connector configration of its consoles through 846 * use of the video= parameter. This function parses that option and 847 * extracts the user's specified mode (or enable/disable status) for a 848 * particular connector. This is typically only used during the early fbdev 849 * setup. 850 */ 851 static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 852 { 853 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 854 char *option = NULL; 855 856 if (fb_get_options(connector->name, &option)) 857 return; 858 859 if (!drm_mode_parse_command_line_for_connector(option, 860 connector, 861 mode)) 862 return; 863 864 if (mode->force) { 865 const char *s; 866 867 switch (mode->force) { 868 case DRM_FORCE_OFF: 869 s = "OFF"; 870 break; 871 case DRM_FORCE_ON_DIGITAL: 872 s = "ON - dig"; 873 break; 874 default: 875 case DRM_FORCE_ON: 876 s = "ON"; 877 break; 878 } 879 880 DRM_INFO("forcing %s connector %s\n", connector->name, s); 881 connector->force = mode->force; 882 } 883 884 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 885 connector->name, 886 mode->xres, mode->yres, 887 mode->refresh_specified ? mode->refresh : 60, 888 mode->rb ? " reduced blanking" : "", 889 mode->margins ? " with margins" : "", 890 mode->interlace ? " interlaced" : ""); 891 } 892 893 /** 894 * drm_connector_init - Init a preallocated connector 895 * @dev: DRM device 896 * @connector: the connector to init 897 * @funcs: callbacks for this connector 898 * @connector_type: user visible type of the connector 899 * 900 * Initialises a preallocated connector. Connectors should be 901 * subclassed as part of driver connector objects. 902 * 903 * Returns: 904 * Zero on success, error code on failure. 905 */ 906 int drm_connector_init(struct drm_device *dev, 907 struct drm_connector *connector, 908 const struct drm_connector_funcs *funcs, 909 int connector_type) 910 { 911 struct drm_mode_config *config = &dev->mode_config; 912 int ret; 913 914 drm_modeset_lock_all(dev); 915 916 ret = drm_mode_object_get(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR); 917 if (ret) 918 goto out_unlock; 919 920 connector->base.properties = &connector->properties; 921 connector->dev = dev; 922 connector->funcs = funcs; 923 connector->connector_type = connector_type; 924 connector->connector_type_id = 925 ++drm_connector_enum_list[connector_type].count; /* TODO */ 926 if (connector->connector_type_id < 0) { 927 ret = connector->connector_type_id; 928 goto out_put; 929 } 930 connector->name = 931 drm_asprintf(GFP_KERNEL, "%s-%d", 932 drm_connector_enum_list[connector_type].name, 933 connector->connector_type_id); 934 if (!connector->name) { 935 ret = -ENOMEM; 936 goto out_put; 937 } 938 939 INIT_LIST_HEAD(&connector->probed_modes); 940 INIT_LIST_HEAD(&connector->modes); 941 connector->edid_blob_ptr = NULL; 942 connector->status = connector_status_unknown; 943 944 drm_connector_get_cmdline_mode(connector); 945 946 /* We should add connectors at the end to avoid upsetting the connector 947 * index too much. */ 948 list_add_tail(&connector->head, &config->connector_list); 949 config->num_connector++; 950 951 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 952 drm_object_attach_property(&connector->base, 953 config->edid_property, 954 0); 955 956 drm_object_attach_property(&connector->base, 957 config->dpms_property, 0); 958 959 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 960 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); 961 } 962 963 connector->debugfs_entry = NULL; 964 965 out_put: 966 if (ret) 967 drm_mode_object_put(dev, &connector->base); 968 969 out_unlock: 970 drm_modeset_unlock_all(dev); 971 972 return ret; 973 } 974 EXPORT_SYMBOL(drm_connector_init); 975 976 /** 977 * drm_connector_cleanup - cleans up an initialised connector 978 * @connector: connector to cleanup 979 * 980 * Cleans up the connector but doesn't free the object. 981 */ 982 void drm_connector_cleanup(struct drm_connector *connector) 983 { 984 struct drm_device *dev = connector->dev; 985 struct drm_display_mode *mode, *t; 986 987 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 988 drm_mode_remove(connector, mode); 989 990 list_for_each_entry_safe(mode, t, &connector->modes, head) 991 drm_mode_remove(connector, mode); 992 993 kfree(connector->display_info.bus_formats); 994 drm_mode_object_put(dev, &connector->base); 995 kfree(connector->name); 996 connector->name = NULL; 997 list_del(&connector->head); 998 dev->mode_config.num_connector--; 999 1000 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 1001 if (connector->state && connector->funcs->atomic_destroy_state) 1002 connector->funcs->atomic_destroy_state(connector, 1003 connector->state); 1004 1005 memset(connector, 0, sizeof(*connector)); 1006 } 1007 EXPORT_SYMBOL(drm_connector_cleanup); 1008 1009 /** 1010 * drm_connector_index - find the index of a registered connector 1011 * @connector: connector to find index for 1012 * 1013 * Given a registered connector, return the index of that connector within a DRM 1014 * device's list of connectors. 1015 */ 1016 unsigned int drm_connector_index(struct drm_connector *connector) 1017 { 1018 unsigned int index = 0; 1019 struct drm_connector *tmp; 1020 struct drm_mode_config *config = &connector->dev->mode_config; 1021 1022 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 1023 1024 drm_for_each_connector(tmp, connector->dev) { 1025 if (tmp == connector) 1026 return index; 1027 1028 index++; 1029 } 1030 1031 BUG(); 1032 } 1033 EXPORT_SYMBOL(drm_connector_index); 1034 1035 /** 1036 * drm_connector_register - register a connector 1037 * @connector: the connector to register 1038 * 1039 * Register userspace interfaces for a connector 1040 * 1041 * Returns: 1042 * Zero on success, error code on failure. 1043 */ 1044 int drm_connector_register(struct drm_connector *connector) 1045 { 1046 int ret; 1047 1048 drm_mode_object_register(connector->dev, &connector->base); 1049 1050 ret = drm_sysfs_connector_add(connector); 1051 if (ret) 1052 return ret; 1053 1054 ret = drm_debugfs_connector_add(connector); 1055 if (ret) { 1056 drm_sysfs_connector_remove(connector); 1057 return ret; 1058 } 1059 1060 return 0; 1061 } 1062 EXPORT_SYMBOL(drm_connector_register); 1063 1064 /** 1065 * drm_connector_unregister - unregister a connector 1066 * @connector: the connector to unregister 1067 * 1068 * Unregister userspace interfaces for a connector 1069 */ 1070 void drm_connector_unregister(struct drm_connector *connector) 1071 { 1072 drm_sysfs_connector_remove(connector); 1073 #if 0 1074 drm_debugfs_connector_remove(connector); 1075 #endif 1076 } 1077 EXPORT_SYMBOL(drm_connector_unregister); 1078 1079 1080 /** 1081 * drm_connector_unplug_all - unregister connector userspace interfaces 1082 * @dev: drm device 1083 * 1084 * This function unregisters all connector userspace interfaces in sysfs. Should 1085 * be call when the device is disconnected, e.g. from an usb driver's 1086 * ->disconnect callback. 1087 */ 1088 void drm_connector_unplug_all(struct drm_device *dev) 1089 { 1090 struct drm_connector *connector; 1091 1092 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */ 1093 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1094 drm_connector_unregister(connector); 1095 1096 } 1097 EXPORT_SYMBOL(drm_connector_unplug_all); 1098 1099 /** 1100 * drm_encoder_init - Init a preallocated encoder 1101 * @dev: drm device 1102 * @encoder: the encoder to init 1103 * @funcs: callbacks for this encoder 1104 * @encoder_type: user visible type of the encoder 1105 * @name: printf style format string for the encoder name, or NULL for default name 1106 * 1107 * Initialises a preallocated encoder. Encoder should be 1108 * subclassed as part of driver encoder objects. 1109 * 1110 * Returns: 1111 * Zero on success, error code on failure. 1112 */ 1113 int drm_encoder_init(struct drm_device *dev, 1114 struct drm_encoder *encoder, 1115 const struct drm_encoder_funcs *funcs, 1116 int encoder_type, const char *name, ...) 1117 { 1118 int ret; 1119 1120 drm_modeset_lock_all(dev); 1121 1122 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1123 if (ret) 1124 goto out_unlock; 1125 1126 encoder->dev = dev; 1127 encoder->encoder_type = encoder_type; 1128 encoder->funcs = funcs; 1129 if (name) { 1130 __va_list ap; 1131 1132 __va_start(ap, name); 1133 encoder->name = kvasprintf(GFP_KERNEL, name, ap); 1134 __va_end(ap); 1135 } else { 1136 encoder->name = kasprintf(GFP_KERNEL, "%s-%d", 1137 drm_encoder_enum_list[encoder_type].name, 1138 encoder->base.id); 1139 } 1140 if (!encoder->name) { 1141 ret = -ENOMEM; 1142 goto out_put; 1143 } 1144 1145 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1146 dev->mode_config.num_encoder++; 1147 1148 out_put: 1149 if (ret) 1150 drm_mode_object_put(dev, &encoder->base); 1151 1152 out_unlock: 1153 drm_modeset_unlock_all(dev); 1154 1155 return ret; 1156 } 1157 EXPORT_SYMBOL(drm_encoder_init); 1158 1159 /** 1160 * drm_encoder_cleanup - cleans up an initialised encoder 1161 * @encoder: encoder to cleanup 1162 * 1163 * Cleans up the encoder but doesn't free the object. 1164 */ 1165 void drm_encoder_cleanup(struct drm_encoder *encoder) 1166 { 1167 struct drm_device *dev = encoder->dev; 1168 1169 drm_modeset_lock_all(dev); 1170 drm_mode_object_put(dev, &encoder->base); 1171 kfree(encoder->name); 1172 list_del(&encoder->head); 1173 dev->mode_config.num_encoder--; 1174 drm_modeset_unlock_all(dev); 1175 1176 memset(encoder, 0, sizeof(*encoder)); 1177 } 1178 EXPORT_SYMBOL(drm_encoder_cleanup); 1179 1180 /** 1181 * drm_universal_plane_init - Initialize a new universal plane object 1182 * @dev: DRM device 1183 * @plane: plane object to init 1184 * @possible_crtcs: bitmask of possible CRTCs 1185 * @funcs: callbacks for the new plane 1186 * @formats: array of supported formats (%DRM_FORMAT_*) 1187 * @format_count: number of elements in @formats 1188 * @type: type of plane (overlay, primary, cursor) 1189 * @name: printf style format string for the plane name, or NULL for default name 1190 * 1191 * Initializes a plane object of type @type. 1192 * 1193 * Returns: 1194 * Zero on success, error code on failure. 1195 */ 1196 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1197 unsigned long possible_crtcs, 1198 const struct drm_plane_funcs *funcs, 1199 const uint32_t *formats, unsigned int format_count, 1200 enum drm_plane_type type, 1201 const char *name, ...) 1202 { 1203 struct drm_mode_config *config = &dev->mode_config; 1204 int ret; 1205 1206 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1207 if (ret) 1208 return ret; 1209 1210 drm_modeset_lock_init(&plane->mutex); 1211 1212 plane->base.properties = &plane->properties; 1213 plane->dev = dev; 1214 plane->funcs = funcs; 1215 plane->format_types = kmalloc(sizeof(uint32_t) * format_count, 1216 M_DRM, M_WAITOK); 1217 if (!plane->format_types) { 1218 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1219 drm_mode_object_put(dev, &plane->base); 1220 return -ENOMEM; 1221 } 1222 1223 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1224 plane->format_count = format_count; 1225 plane->possible_crtcs = possible_crtcs; 1226 plane->type = type; 1227 1228 list_add_tail(&plane->head, &config->plane_list); 1229 config->num_total_plane++; 1230 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1231 config->num_overlay_plane++; 1232 1233 drm_object_attach_property(&plane->base, 1234 config->plane_type_property, 1235 plane->type); 1236 1237 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 1238 drm_object_attach_property(&plane->base, config->prop_fb_id, 0); 1239 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); 1240 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); 1241 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); 1242 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); 1243 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); 1244 drm_object_attach_property(&plane->base, config->prop_src_x, 0); 1245 drm_object_attach_property(&plane->base, config->prop_src_y, 0); 1246 drm_object_attach_property(&plane->base, config->prop_src_w, 0); 1247 drm_object_attach_property(&plane->base, config->prop_src_h, 0); 1248 } 1249 1250 return 0; 1251 } 1252 EXPORT_SYMBOL(drm_universal_plane_init); 1253 1254 /** 1255 * drm_plane_init - Initialize a legacy plane 1256 * @dev: DRM device 1257 * @plane: plane object to init 1258 * @possible_crtcs: bitmask of possible CRTCs 1259 * @funcs: callbacks for the new plane 1260 * @formats: array of supported formats (%DRM_FORMAT_*) 1261 * @format_count: number of elements in @formats 1262 * @is_primary: plane type (primary vs overlay) 1263 * 1264 * Legacy API to initialize a DRM plane. 1265 * 1266 * New drivers should call drm_universal_plane_init() instead. 1267 * 1268 * Returns: 1269 * Zero on success, error code on failure. 1270 */ 1271 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1272 unsigned long possible_crtcs, 1273 const struct drm_plane_funcs *funcs, 1274 const uint32_t *formats, unsigned int format_count, 1275 bool is_primary) 1276 { 1277 enum drm_plane_type type; 1278 1279 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1280 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1281 formats, format_count, type, NULL); 1282 } 1283 EXPORT_SYMBOL(drm_plane_init); 1284 1285 /** 1286 * drm_plane_cleanup - Clean up the core plane usage 1287 * @plane: plane to cleanup 1288 * 1289 * This function cleans up @plane and removes it from the DRM mode setting 1290 * core. Note that the function does *not* free the plane structure itself, 1291 * this is the responsibility of the caller. 1292 */ 1293 void drm_plane_cleanup(struct drm_plane *plane) 1294 { 1295 struct drm_device *dev = plane->dev; 1296 1297 drm_modeset_lock_all(dev); 1298 kfree(plane->format_types); 1299 drm_mode_object_put(dev, &plane->base); 1300 1301 BUG_ON(list_empty(&plane->head)); 1302 1303 list_del(&plane->head); 1304 dev->mode_config.num_total_plane--; 1305 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1306 dev->mode_config.num_overlay_plane--; 1307 drm_modeset_unlock_all(dev); 1308 1309 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1310 if (plane->state && plane->funcs->atomic_destroy_state) 1311 plane->funcs->atomic_destroy_state(plane, plane->state); 1312 1313 memset(plane, 0, sizeof(*plane)); 1314 } 1315 EXPORT_SYMBOL(drm_plane_cleanup); 1316 1317 /** 1318 * drm_plane_index - find the index of a registered plane 1319 * @plane: plane to find index for 1320 * 1321 * Given a registered plane, return the index of that CRTC within a DRM 1322 * device's list of planes. 1323 */ 1324 unsigned int drm_plane_index(struct drm_plane *plane) 1325 { 1326 unsigned int index = 0; 1327 struct drm_plane *tmp; 1328 1329 drm_for_each_plane(tmp, plane->dev) { 1330 if (tmp == plane) 1331 return index; 1332 1333 index++; 1334 } 1335 1336 BUG(); 1337 } 1338 EXPORT_SYMBOL(drm_plane_index); 1339 1340 /** 1341 * drm_plane_from_index - find the registered plane at an index 1342 * @dev: DRM device 1343 * @idx: index of registered plane to find for 1344 * 1345 * Given a plane index, return the registered plane from DRM device's 1346 * list of planes with matching index. 1347 */ 1348 struct drm_plane * 1349 drm_plane_from_index(struct drm_device *dev, int idx) 1350 { 1351 struct drm_plane *plane; 1352 unsigned int i = 0; 1353 1354 drm_for_each_plane(plane, dev) { 1355 if (i == idx) 1356 return plane; 1357 i++; 1358 } 1359 return NULL; 1360 } 1361 EXPORT_SYMBOL(drm_plane_from_index); 1362 1363 /** 1364 * drm_plane_force_disable - Forcibly disable a plane 1365 * @plane: plane to disable 1366 * 1367 * Forces the plane to be disabled. 1368 * 1369 * Used when the plane's current framebuffer is destroyed, 1370 * and when restoring fbdev mode. 1371 */ 1372 void drm_plane_force_disable(struct drm_plane *plane) 1373 { 1374 int ret; 1375 1376 if (!plane->fb) 1377 return; 1378 1379 plane->old_fb = plane->fb; 1380 ret = plane->funcs->disable_plane(plane); 1381 if (ret) { 1382 DRM_ERROR("failed to disable plane with busy fb\n"); 1383 plane->old_fb = NULL; 1384 return; 1385 } 1386 /* disconnect the plane from the fb and crtc: */ 1387 drm_framebuffer_unreference(plane->old_fb); 1388 plane->old_fb = NULL; 1389 plane->fb = NULL; 1390 plane->crtc = NULL; 1391 } 1392 EXPORT_SYMBOL(drm_plane_force_disable); 1393 1394 static int drm_mode_create_standard_properties(struct drm_device *dev) 1395 { 1396 struct drm_property *prop; 1397 1398 /* 1399 * Standard properties (apply to all connectors) 1400 */ 1401 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1402 DRM_MODE_PROP_IMMUTABLE, 1403 "EDID", 0); 1404 if (!prop) 1405 return -ENOMEM; 1406 dev->mode_config.edid_property = prop; 1407 1408 prop = drm_property_create_enum(dev, 0, 1409 "DPMS", drm_dpms_enum_list, 1410 ARRAY_SIZE(drm_dpms_enum_list)); 1411 if (!prop) 1412 return -ENOMEM; 1413 dev->mode_config.dpms_property = prop; 1414 1415 prop = drm_property_create(dev, 1416 DRM_MODE_PROP_BLOB | 1417 DRM_MODE_PROP_IMMUTABLE, 1418 "PATH", 0); 1419 if (!prop) 1420 return -ENOMEM; 1421 dev->mode_config.path_property = prop; 1422 1423 prop = drm_property_create(dev, 1424 DRM_MODE_PROP_BLOB | 1425 DRM_MODE_PROP_IMMUTABLE, 1426 "TILE", 0); 1427 if (!prop) 1428 return -ENOMEM; 1429 dev->mode_config.tile_property = prop; 1430 1431 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1432 "type", drm_plane_type_enum_list, 1433 ARRAY_SIZE(drm_plane_type_enum_list)); 1434 if (!prop) 1435 return -ENOMEM; 1436 dev->mode_config.plane_type_property = prop; 1437 1438 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1439 "SRC_X", 0, UINT_MAX); 1440 if (!prop) 1441 return -ENOMEM; 1442 dev->mode_config.prop_src_x = prop; 1443 1444 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1445 "SRC_Y", 0, UINT_MAX); 1446 if (!prop) 1447 return -ENOMEM; 1448 dev->mode_config.prop_src_y = prop; 1449 1450 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1451 "SRC_W", 0, UINT_MAX); 1452 if (!prop) 1453 return -ENOMEM; 1454 dev->mode_config.prop_src_w = prop; 1455 1456 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1457 "SRC_H", 0, UINT_MAX); 1458 if (!prop) 1459 return -ENOMEM; 1460 dev->mode_config.prop_src_h = prop; 1461 1462 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1463 "CRTC_X", INT_MIN, INT_MAX); 1464 if (!prop) 1465 return -ENOMEM; 1466 dev->mode_config.prop_crtc_x = prop; 1467 1468 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1469 "CRTC_Y", INT_MIN, INT_MAX); 1470 if (!prop) 1471 return -ENOMEM; 1472 dev->mode_config.prop_crtc_y = prop; 1473 1474 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1475 "CRTC_W", 0, INT_MAX); 1476 if (!prop) 1477 return -ENOMEM; 1478 dev->mode_config.prop_crtc_w = prop; 1479 1480 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1481 "CRTC_H", 0, INT_MAX); 1482 if (!prop) 1483 return -ENOMEM; 1484 dev->mode_config.prop_crtc_h = prop; 1485 1486 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1487 "FB_ID", DRM_MODE_OBJECT_FB); 1488 if (!prop) 1489 return -ENOMEM; 1490 dev->mode_config.prop_fb_id = prop; 1491 1492 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1493 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 1494 if (!prop) 1495 return -ENOMEM; 1496 dev->mode_config.prop_crtc_id = prop; 1497 1498 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 1499 "ACTIVE"); 1500 if (!prop) 1501 return -ENOMEM; 1502 dev->mode_config.prop_active = prop; 1503 1504 prop = drm_property_create(dev, 1505 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 1506 "MODE_ID", 0); 1507 if (!prop) 1508 return -ENOMEM; 1509 dev->mode_config.prop_mode_id = prop; 1510 1511 return 0; 1512 } 1513 1514 /** 1515 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1516 * @dev: DRM device 1517 * 1518 * Called by a driver the first time a DVI-I connector is made. 1519 */ 1520 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1521 { 1522 struct drm_property *dvi_i_selector; 1523 struct drm_property *dvi_i_subconnector; 1524 1525 if (dev->mode_config.dvi_i_select_subconnector_property) 1526 return 0; 1527 1528 dvi_i_selector = 1529 drm_property_create_enum(dev, 0, 1530 "select subconnector", 1531 drm_dvi_i_select_enum_list, 1532 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1533 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1534 1535 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1536 "subconnector", 1537 drm_dvi_i_subconnector_enum_list, 1538 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1539 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1540 1541 return 0; 1542 } 1543 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1544 1545 /** 1546 * drm_create_tv_properties - create TV specific connector properties 1547 * @dev: DRM device 1548 * @num_modes: number of different TV formats (modes) supported 1549 * @modes: array of pointers to strings containing name of each format 1550 * 1551 * Called by a driver's TV initialization routine, this function creates 1552 * the TV specific connector properties for a given device. Caller is 1553 * responsible for allocating a list of format names and passing them to 1554 * this routine. 1555 */ 1556 int drm_mode_create_tv_properties(struct drm_device *dev, 1557 unsigned int num_modes, 1558 const char * const modes[]) 1559 { 1560 struct drm_property *tv_selector; 1561 struct drm_property *tv_subconnector; 1562 unsigned int i; 1563 1564 if (dev->mode_config.tv_select_subconnector_property) 1565 return 0; 1566 1567 /* 1568 * Basic connector properties 1569 */ 1570 tv_selector = drm_property_create_enum(dev, 0, 1571 "select subconnector", 1572 drm_tv_select_enum_list, 1573 ARRAY_SIZE(drm_tv_select_enum_list)); 1574 if (!tv_selector) 1575 goto nomem; 1576 1577 dev->mode_config.tv_select_subconnector_property = tv_selector; 1578 1579 tv_subconnector = 1580 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1581 "subconnector", 1582 drm_tv_subconnector_enum_list, 1583 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1584 if (!tv_subconnector) 1585 goto nomem; 1586 dev->mode_config.tv_subconnector_property = tv_subconnector; 1587 1588 /* 1589 * Other, TV specific properties: margins & TV modes. 1590 */ 1591 dev->mode_config.tv_left_margin_property = 1592 drm_property_create_range(dev, 0, "left margin", 0, 100); 1593 if (!dev->mode_config.tv_left_margin_property) 1594 goto nomem; 1595 1596 dev->mode_config.tv_right_margin_property = 1597 drm_property_create_range(dev, 0, "right margin", 0, 100); 1598 if (!dev->mode_config.tv_right_margin_property) 1599 goto nomem; 1600 1601 dev->mode_config.tv_top_margin_property = 1602 drm_property_create_range(dev, 0, "top margin", 0, 100); 1603 if (!dev->mode_config.tv_top_margin_property) 1604 goto nomem; 1605 1606 dev->mode_config.tv_bottom_margin_property = 1607 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1608 if (!dev->mode_config.tv_bottom_margin_property) 1609 goto nomem; 1610 1611 dev->mode_config.tv_mode_property = 1612 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1613 "mode", num_modes); 1614 if (!dev->mode_config.tv_mode_property) 1615 goto nomem; 1616 1617 for (i = 0; i < num_modes; i++) 1618 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1619 i, modes[i]); 1620 1621 dev->mode_config.tv_brightness_property = 1622 drm_property_create_range(dev, 0, "brightness", 0, 100); 1623 if (!dev->mode_config.tv_brightness_property) 1624 goto nomem; 1625 1626 dev->mode_config.tv_contrast_property = 1627 drm_property_create_range(dev, 0, "contrast", 0, 100); 1628 if (!dev->mode_config.tv_contrast_property) 1629 goto nomem; 1630 1631 dev->mode_config.tv_flicker_reduction_property = 1632 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1633 if (!dev->mode_config.tv_flicker_reduction_property) 1634 goto nomem; 1635 1636 dev->mode_config.tv_overscan_property = 1637 drm_property_create_range(dev, 0, "overscan", 0, 100); 1638 if (!dev->mode_config.tv_overscan_property) 1639 goto nomem; 1640 1641 dev->mode_config.tv_saturation_property = 1642 drm_property_create_range(dev, 0, "saturation", 0, 100); 1643 if (!dev->mode_config.tv_saturation_property) 1644 goto nomem; 1645 1646 dev->mode_config.tv_hue_property = 1647 drm_property_create_range(dev, 0, "hue", 0, 100); 1648 if (!dev->mode_config.tv_hue_property) 1649 goto nomem; 1650 1651 return 0; 1652 nomem: 1653 return -ENOMEM; 1654 } 1655 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1656 1657 /** 1658 * drm_mode_create_scaling_mode_property - create scaling mode property 1659 * @dev: DRM device 1660 * 1661 * Called by a driver the first time it's needed, must be attached to desired 1662 * connectors. 1663 */ 1664 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1665 { 1666 struct drm_property *scaling_mode; 1667 1668 if (dev->mode_config.scaling_mode_property) 1669 return 0; 1670 1671 scaling_mode = 1672 drm_property_create_enum(dev, 0, "scaling mode", 1673 drm_scaling_mode_enum_list, 1674 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1675 1676 dev->mode_config.scaling_mode_property = scaling_mode; 1677 1678 return 0; 1679 } 1680 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1681 1682 /** 1683 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1684 * @dev: DRM device 1685 * 1686 * Called by a driver the first time it's needed, must be attached to desired 1687 * connectors. 1688 * 1689 * Returns: 1690 * Zero on success, negative errno on failure. 1691 */ 1692 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1693 { 1694 if (dev->mode_config.aspect_ratio_property) 1695 return 0; 1696 1697 dev->mode_config.aspect_ratio_property = 1698 drm_property_create_enum(dev, 0, "aspect ratio", 1699 drm_aspect_ratio_enum_list, 1700 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1701 1702 if (dev->mode_config.aspect_ratio_property == NULL) 1703 return -ENOMEM; 1704 1705 return 0; 1706 } 1707 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1708 1709 /** 1710 * drm_mode_create_dirty_property - create dirty property 1711 * @dev: DRM device 1712 * 1713 * Called by a driver the first time it's needed, must be attached to desired 1714 * connectors. 1715 */ 1716 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1717 { 1718 struct drm_property *dirty_info; 1719 1720 if (dev->mode_config.dirty_info_property) 1721 return 0; 1722 1723 dirty_info = 1724 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1725 "dirty", 1726 drm_dirty_info_enum_list, 1727 ARRAY_SIZE(drm_dirty_info_enum_list)); 1728 dev->mode_config.dirty_info_property = dirty_info; 1729 1730 return 0; 1731 } 1732 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1733 1734 /** 1735 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1736 * @dev: DRM device 1737 * 1738 * Create the the suggested x/y offset property for connectors. 1739 */ 1740 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1741 { 1742 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1743 return 0; 1744 1745 dev->mode_config.suggested_x_property = 1746 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1747 1748 dev->mode_config.suggested_y_property = 1749 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1750 1751 if (dev->mode_config.suggested_x_property == NULL || 1752 dev->mode_config.suggested_y_property == NULL) 1753 return -ENOMEM; 1754 return 0; 1755 } 1756 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1757 1758 /** 1759 * drm_mode_getresources - get graphics configuration 1760 * @dev: drm device for the ioctl 1761 * @data: data pointer for the ioctl 1762 * @file_priv: drm file for the ioctl call 1763 * 1764 * Construct a set of configuration description structures and return 1765 * them to the user, including CRTC, connector and framebuffer configuration. 1766 * 1767 * Called by the user via ioctl. 1768 * 1769 * Returns: 1770 * Zero on success, negative errno on failure. 1771 */ 1772 int drm_mode_getresources(struct drm_device *dev, void *data, 1773 struct drm_file *file_priv) 1774 { 1775 struct drm_mode_card_res *card_res = data; 1776 struct list_head *lh; 1777 struct drm_framebuffer *fb; 1778 struct drm_connector *connector; 1779 struct drm_crtc *crtc; 1780 struct drm_encoder *encoder; 1781 int ret = 0; 1782 int connector_count = 0; 1783 int crtc_count = 0; 1784 int fb_count = 0; 1785 int encoder_count = 0; 1786 int copied = 0; 1787 uint32_t __user *fb_id; 1788 uint32_t __user *crtc_id; 1789 uint32_t __user *connector_id; 1790 uint32_t __user *encoder_id; 1791 1792 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1793 return -EINVAL; 1794 1795 1796 mutex_lock(&file_priv->fbs_lock); 1797 /* 1798 * For the non-control nodes we need to limit the list of resources 1799 * by IDs in the group list for this node 1800 */ 1801 list_for_each(lh, &file_priv->fbs) 1802 fb_count++; 1803 1804 /* handle this in 4 parts */ 1805 /* FBs */ 1806 if (card_res->count_fbs >= fb_count) { 1807 copied = 0; 1808 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1809 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1810 if (put_user(fb->base.id, fb_id + copied)) { 1811 mutex_unlock(&file_priv->fbs_lock); 1812 return -EFAULT; 1813 } 1814 copied++; 1815 } 1816 } 1817 card_res->count_fbs = fb_count; 1818 mutex_unlock(&file_priv->fbs_lock); 1819 1820 /* mode_config.mutex protects the connector list against e.g. DP MST 1821 * connector hot-adding. CRTC/Plane lists are invariant. */ 1822 mutex_lock(&dev->mode_config.mutex); 1823 drm_for_each_crtc(crtc, dev) 1824 crtc_count++; 1825 1826 drm_for_each_connector(connector, dev) 1827 connector_count++; 1828 1829 drm_for_each_encoder(encoder, dev) 1830 encoder_count++; 1831 1832 card_res->max_height = dev->mode_config.max_height; 1833 card_res->min_height = dev->mode_config.min_height; 1834 card_res->max_width = dev->mode_config.max_width; 1835 card_res->min_width = dev->mode_config.min_width; 1836 1837 /* CRTCs */ 1838 if (card_res->count_crtcs >= crtc_count) { 1839 copied = 0; 1840 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1841 drm_for_each_crtc(crtc, dev) { 1842 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", 1843 crtc->base.id, crtc->name); 1844 if (put_user(crtc->base.id, crtc_id + copied)) { 1845 ret = -EFAULT; 1846 goto out; 1847 } 1848 copied++; 1849 } 1850 } 1851 card_res->count_crtcs = crtc_count; 1852 1853 /* Encoders */ 1854 if (card_res->count_encoders >= encoder_count) { 1855 copied = 0; 1856 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1857 drm_for_each_encoder(encoder, dev) { 1858 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1859 encoder->name); 1860 if (put_user(encoder->base.id, encoder_id + 1861 copied)) { 1862 ret = -EFAULT; 1863 goto out; 1864 } 1865 copied++; 1866 } 1867 } 1868 card_res->count_encoders = encoder_count; 1869 1870 /* Connectors */ 1871 if (card_res->count_connectors >= connector_count) { 1872 copied = 0; 1873 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1874 drm_for_each_connector(connector, dev) { 1875 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1876 connector->base.id, 1877 connector->name); 1878 if (put_user(connector->base.id, 1879 connector_id + copied)) { 1880 ret = -EFAULT; 1881 goto out; 1882 } 1883 copied++; 1884 } 1885 } 1886 card_res->count_connectors = connector_count; 1887 1888 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1889 card_res->count_connectors, card_res->count_encoders); 1890 1891 out: 1892 mutex_unlock(&dev->mode_config.mutex); 1893 return ret; 1894 } 1895 1896 /** 1897 * drm_mode_getcrtc - get CRTC configuration 1898 * @dev: drm device for the ioctl 1899 * @data: data pointer for the ioctl 1900 * @file_priv: drm file for the ioctl call 1901 * 1902 * Construct a CRTC configuration structure to return to the user. 1903 * 1904 * Called by the user via ioctl. 1905 * 1906 * Returns: 1907 * Zero on success, negative errno on failure. 1908 */ 1909 int drm_mode_getcrtc(struct drm_device *dev, 1910 void *data, struct drm_file *file_priv) 1911 { 1912 struct drm_mode_crtc *crtc_resp = data; 1913 struct drm_crtc *crtc; 1914 1915 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1916 return -EINVAL; 1917 1918 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 1919 if (!crtc) 1920 return -ENOENT; 1921 1922 drm_modeset_lock_crtc(crtc, crtc->primary); 1923 crtc_resp->gamma_size = crtc->gamma_size; 1924 if (crtc->primary->fb) 1925 crtc_resp->fb_id = crtc->primary->fb->base.id; 1926 else 1927 crtc_resp->fb_id = 0; 1928 1929 if (crtc->state) { 1930 crtc_resp->x = crtc->primary->state->src_x >> 16; 1931 crtc_resp->y = crtc->primary->state->src_y >> 16; 1932 if (crtc->state->enable) { 1933 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); 1934 crtc_resp->mode_valid = 1; 1935 1936 } else { 1937 crtc_resp->mode_valid = 0; 1938 } 1939 } else { 1940 crtc_resp->x = crtc->x; 1941 crtc_resp->y = crtc->y; 1942 if (crtc->enabled) { 1943 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); 1944 crtc_resp->mode_valid = 1; 1945 1946 } else { 1947 crtc_resp->mode_valid = 0; 1948 } 1949 } 1950 drm_modeset_unlock_crtc(crtc); 1951 1952 return 0; 1953 } 1954 1955 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 1956 const struct drm_file *file_priv) 1957 { 1958 /* 1959 * If user-space hasn't configured the driver to expose the stereo 3D 1960 * modes, don't expose them. 1961 */ 1962 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 1963 return false; 1964 1965 return true; 1966 } 1967 1968 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 1969 { 1970 /* For atomic drivers only state objects are synchronously updated and 1971 * protected by modeset locks, so check those first. */ 1972 if (connector->state) 1973 return connector->state->best_encoder; 1974 return connector->encoder; 1975 } 1976 1977 /* helper for getconnector and getproperties ioctls */ 1978 static int get_properties(struct drm_mode_object *obj, bool atomic, 1979 uint32_t __user *prop_ptr, uint64_t __user *prop_values, 1980 uint32_t *arg_count_props) 1981 { 1982 int props_count; 1983 int i, ret, copied; 1984 1985 props_count = obj->properties->count; 1986 if (!atomic) 1987 props_count -= obj->properties->atomic_count; 1988 1989 if ((*arg_count_props >= props_count) && props_count) { 1990 for (i = 0, copied = 0; copied < props_count; i++) { 1991 struct drm_property *prop = obj->properties->properties[i]; 1992 uint64_t val; 1993 1994 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) 1995 continue; 1996 1997 ret = drm_object_property_get_value(obj, prop, &val); 1998 if (ret) 1999 return ret; 2000 2001 if (put_user(prop->base.id, prop_ptr + copied)) 2002 return -EFAULT; 2003 2004 if (put_user(val, prop_values + copied)) 2005 return -EFAULT; 2006 2007 copied++; 2008 } 2009 } 2010 *arg_count_props = props_count; 2011 2012 return 0; 2013 } 2014 2015 /** 2016 * drm_mode_getconnector - get connector configuration 2017 * @dev: drm device for the ioctl 2018 * @data: data pointer for the ioctl 2019 * @file_priv: drm file for the ioctl call 2020 * 2021 * Construct a connector configuration structure to return to the user. 2022 * 2023 * Called by the user via ioctl. 2024 * 2025 * Returns: 2026 * Zero on success, negative errno on failure. 2027 */ 2028 int drm_mode_getconnector(struct drm_device *dev, void *data, 2029 struct drm_file *file_priv) 2030 { 2031 struct drm_mode_get_connector *out_resp = data; 2032 struct drm_connector *connector; 2033 struct drm_encoder *encoder; 2034 struct drm_display_mode *mode; 2035 int mode_count = 0; 2036 int encoders_count = 0; 2037 int ret = 0; 2038 int copied = 0; 2039 int i; 2040 struct drm_mode_modeinfo u_mode; 2041 struct drm_mode_modeinfo __user *mode_ptr; 2042 uint32_t __user *encoder_ptr; 2043 2044 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2045 return -EINVAL; 2046 2047 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2048 2049 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 2050 2051 mutex_lock(&dev->mode_config.mutex); 2052 2053 connector = drm_connector_find(dev, out_resp->connector_id); 2054 if (!connector) { 2055 ret = -ENOENT; 2056 goto out_unlock; 2057 } 2058 2059 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) 2060 if (connector->encoder_ids[i] != 0) 2061 encoders_count++; 2062 2063 if (out_resp->count_modes == 0) { 2064 connector->funcs->fill_modes(connector, 2065 dev->mode_config.max_width, 2066 dev->mode_config.max_height); 2067 } 2068 2069 /* delayed so we get modes regardless of pre-fill_modes state */ 2070 list_for_each_entry(mode, &connector->modes, head) 2071 if (drm_mode_expose_to_userspace(mode, file_priv)) 2072 mode_count++; 2073 2074 out_resp->connector_id = connector->base.id; 2075 out_resp->connector_type = connector->connector_type; 2076 out_resp->connector_type_id = connector->connector_type_id; 2077 out_resp->mm_width = connector->display_info.width_mm; 2078 out_resp->mm_height = connector->display_info.height_mm; 2079 out_resp->subpixel = connector->display_info.subpixel_order; 2080 out_resp->connection = connector->status; 2081 2082 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2083 encoder = drm_connector_get_encoder(connector); 2084 if (encoder) 2085 out_resp->encoder_id = encoder->base.id; 2086 else 2087 out_resp->encoder_id = 0; 2088 2089 /* 2090 * This ioctl is called twice, once to determine how much space is 2091 * needed, and the 2nd time to fill it. 2092 */ 2093 if ((out_resp->count_modes >= mode_count) && mode_count) { 2094 copied = 0; 2095 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2096 list_for_each_entry(mode, &connector->modes, head) { 2097 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2098 continue; 2099 2100 drm_mode_convert_to_umode(&u_mode, mode); 2101 if (copy_to_user(mode_ptr + copied, 2102 &u_mode, sizeof(u_mode))) { 2103 ret = -EFAULT; 2104 goto out; 2105 } 2106 copied++; 2107 } 2108 } 2109 out_resp->count_modes = mode_count; 2110 2111 ret = get_properties(&connector->base, file_priv->atomic, 2112 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2113 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2114 &out_resp->count_props); 2115 if (ret) 2116 goto out; 2117 2118 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2119 copied = 0; 2120 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2121 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2122 if (connector->encoder_ids[i] != 0) { 2123 if (put_user(connector->encoder_ids[i], 2124 encoder_ptr + copied)) { 2125 ret = -EFAULT; 2126 goto out; 2127 } 2128 copied++; 2129 } 2130 } 2131 } 2132 out_resp->count_encoders = encoders_count; 2133 2134 out: 2135 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2136 2137 out_unlock: 2138 mutex_unlock(&dev->mode_config.mutex); 2139 2140 return ret; 2141 } 2142 2143 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2144 { 2145 struct drm_connector *connector; 2146 struct drm_device *dev = encoder->dev; 2147 bool uses_atomic = false; 2148 2149 /* For atomic drivers only state objects are synchronously updated and 2150 * protected by modeset locks, so check those first. */ 2151 drm_for_each_connector(connector, dev) { 2152 if (!connector->state) 2153 continue; 2154 2155 uses_atomic = true; 2156 2157 if (connector->state->best_encoder != encoder) 2158 continue; 2159 2160 return connector->state->crtc; 2161 } 2162 2163 /* Don't return stale data (e.g. pending async disable). */ 2164 if (uses_atomic) 2165 return NULL; 2166 2167 return encoder->crtc; 2168 } 2169 2170 /** 2171 * drm_mode_getencoder - get encoder configuration 2172 * @dev: drm device for the ioctl 2173 * @data: data pointer for the ioctl 2174 * @file_priv: drm file for the ioctl call 2175 * 2176 * Construct a encoder configuration structure to return to the user. 2177 * 2178 * Called by the user via ioctl. 2179 * 2180 * Returns: 2181 * Zero on success, negative errno on failure. 2182 */ 2183 int drm_mode_getencoder(struct drm_device *dev, void *data, 2184 struct drm_file *file_priv) 2185 { 2186 struct drm_mode_get_encoder *enc_resp = data; 2187 struct drm_encoder *encoder; 2188 struct drm_crtc *crtc; 2189 2190 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2191 return -EINVAL; 2192 2193 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2194 if (!encoder) 2195 return -ENOENT; 2196 2197 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2198 crtc = drm_encoder_get_crtc(encoder); 2199 if (crtc) 2200 enc_resp->crtc_id = crtc->base.id; 2201 else 2202 enc_resp->crtc_id = 0; 2203 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2204 2205 enc_resp->encoder_type = encoder->encoder_type; 2206 enc_resp->encoder_id = encoder->base.id; 2207 enc_resp->possible_crtcs = encoder->possible_crtcs; 2208 enc_resp->possible_clones = encoder->possible_clones; 2209 2210 return 0; 2211 } 2212 2213 /** 2214 * drm_mode_getplane_res - enumerate all plane resources 2215 * @dev: DRM device 2216 * @data: ioctl data 2217 * @file_priv: DRM file info 2218 * 2219 * Construct a list of plane ids to return to the user. 2220 * 2221 * Called by the user via ioctl. 2222 * 2223 * Returns: 2224 * Zero on success, negative errno on failure. 2225 */ 2226 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2227 struct drm_file *file_priv) 2228 { 2229 struct drm_mode_get_plane_res *plane_resp = data; 2230 struct drm_mode_config *config; 2231 struct drm_plane *plane; 2232 uint32_t __user *plane_ptr; 2233 int copied = 0; 2234 unsigned num_planes; 2235 2236 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2237 return -EINVAL; 2238 2239 config = &dev->mode_config; 2240 2241 if (file_priv->universal_planes) 2242 num_planes = config->num_total_plane; 2243 else 2244 num_planes = config->num_overlay_plane; 2245 2246 /* 2247 * This ioctl is called twice, once to determine how much space is 2248 * needed, and the 2nd time to fill it. 2249 */ 2250 if (num_planes && 2251 (plane_resp->count_planes >= num_planes)) { 2252 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2253 2254 /* Plane lists are invariant, no locking needed. */ 2255 drm_for_each_plane(plane, dev) { 2256 /* 2257 * Unless userspace set the 'universal planes' 2258 * capability bit, only advertise overlays. 2259 */ 2260 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2261 !file_priv->universal_planes) 2262 continue; 2263 2264 if (put_user(plane->base.id, plane_ptr + copied)) 2265 return -EFAULT; 2266 copied++; 2267 } 2268 } 2269 plane_resp->count_planes = num_planes; 2270 2271 return 0; 2272 } 2273 2274 /** 2275 * drm_mode_getplane - get plane configuration 2276 * @dev: DRM device 2277 * @data: ioctl data 2278 * @file_priv: DRM file info 2279 * 2280 * Construct a plane configuration structure to return to the user. 2281 * 2282 * Called by the user via ioctl. 2283 * 2284 * Returns: 2285 * Zero on success, negative errno on failure. 2286 */ 2287 int drm_mode_getplane(struct drm_device *dev, void *data, 2288 struct drm_file *file_priv) 2289 { 2290 struct drm_mode_get_plane *plane_resp = data; 2291 struct drm_plane *plane; 2292 uint32_t __user *format_ptr; 2293 2294 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2295 return -EINVAL; 2296 2297 plane = drm_plane_find(dev, plane_resp->plane_id); 2298 if (!plane) 2299 return -ENOENT; 2300 2301 drm_modeset_lock(&plane->mutex, NULL); 2302 if (plane->crtc) 2303 plane_resp->crtc_id = plane->crtc->base.id; 2304 else 2305 plane_resp->crtc_id = 0; 2306 2307 if (plane->fb) 2308 plane_resp->fb_id = plane->fb->base.id; 2309 else 2310 plane_resp->fb_id = 0; 2311 drm_modeset_unlock(&plane->mutex); 2312 2313 plane_resp->plane_id = plane->base.id; 2314 plane_resp->possible_crtcs = plane->possible_crtcs; 2315 plane_resp->gamma_size = 0; 2316 2317 /* 2318 * This ioctl is called twice, once to determine how much space is 2319 * needed, and the 2nd time to fill it. 2320 */ 2321 if (plane->format_count && 2322 (plane_resp->count_format_types >= plane->format_count)) { 2323 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2324 if (copy_to_user(format_ptr, 2325 plane->format_types, 2326 sizeof(uint32_t) * plane->format_count)) { 2327 return -EFAULT; 2328 } 2329 } 2330 plane_resp->count_format_types = plane->format_count; 2331 2332 return 0; 2333 } 2334 2335 /** 2336 * drm_plane_check_pixel_format - Check if the plane supports the pixel format 2337 * @plane: plane to check for format support 2338 * @format: the pixel format 2339 * 2340 * Returns: 2341 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL 2342 * otherwise. 2343 */ 2344 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format) 2345 { 2346 unsigned int i; 2347 2348 for (i = 0; i < plane->format_count; i++) { 2349 if (format == plane->format_types[i]) 2350 return 0; 2351 } 2352 2353 return -EINVAL; 2354 } 2355 2356 static int check_src_coords(uint32_t src_x, uint32_t src_y, 2357 uint32_t src_w, uint32_t src_h, 2358 const struct drm_framebuffer *fb) 2359 { 2360 unsigned int fb_width, fb_height; 2361 2362 fb_width = fb->width << 16; 2363 fb_height = fb->height << 16; 2364 2365 /* Make sure source coordinates are inside the fb. */ 2366 if (src_w > fb_width || 2367 src_x > fb_width - src_w || 2368 src_h > fb_height || 2369 src_y > fb_height - src_h) { 2370 DRM_DEBUG_KMS("Invalid source coordinates " 2371 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2372 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2373 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2374 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2375 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2376 return -ENOSPC; 2377 } 2378 2379 return 0; 2380 } 2381 2382 /* 2383 * setplane_internal - setplane handler for internal callers 2384 * 2385 * Note that we assume an extra reference has already been taken on fb. If the 2386 * update fails, this reference will be dropped before return; if it succeeds, 2387 * the previous framebuffer (if any) will be unreferenced instead. 2388 * 2389 * src_{x,y,w,h} are provided in 16.16 fixed point format 2390 */ 2391 static int __setplane_internal(struct drm_plane *plane, 2392 struct drm_crtc *crtc, 2393 struct drm_framebuffer *fb, 2394 int32_t crtc_x, int32_t crtc_y, 2395 uint32_t crtc_w, uint32_t crtc_h, 2396 /* src_{x,y,w,h} values are 16.16 fixed point */ 2397 uint32_t src_x, uint32_t src_y, 2398 uint32_t src_w, uint32_t src_h) 2399 { 2400 int ret = 0; 2401 2402 /* No fb means shut it down */ 2403 if (!fb) { 2404 plane->old_fb = plane->fb; 2405 ret = plane->funcs->disable_plane(plane); 2406 if (!ret) { 2407 plane->crtc = NULL; 2408 plane->fb = NULL; 2409 } else { 2410 plane->old_fb = NULL; 2411 } 2412 goto out; 2413 } 2414 2415 /* Check whether this plane is usable on this CRTC */ 2416 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2417 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2418 ret = -EINVAL; 2419 goto out; 2420 } 2421 2422 /* Check whether this plane supports the fb pixel format. */ 2423 ret = drm_plane_check_pixel_format(plane, fb->pixel_format); 2424 if (ret) { 2425 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2426 drm_get_format_name(fb->pixel_format)); 2427 goto out; 2428 } 2429 2430 /* Give drivers some help against integer overflows */ 2431 if (crtc_w > INT_MAX || 2432 crtc_x > INT_MAX - (int32_t) crtc_w || 2433 crtc_h > INT_MAX || 2434 crtc_y > INT_MAX - (int32_t) crtc_h) { 2435 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2436 crtc_w, crtc_h, crtc_x, crtc_y); 2437 ret = -ERANGE; 2438 goto out; 2439 } 2440 2441 ret = check_src_coords(src_x, src_y, src_w, src_h, fb); 2442 if (ret) 2443 goto out; 2444 2445 plane->old_fb = plane->fb; 2446 ret = plane->funcs->update_plane(plane, crtc, fb, 2447 crtc_x, crtc_y, crtc_w, crtc_h, 2448 src_x, src_y, src_w, src_h); 2449 if (!ret) { 2450 plane->crtc = crtc; 2451 plane->fb = fb; 2452 fb = NULL; 2453 } else { 2454 plane->old_fb = NULL; 2455 } 2456 2457 out: 2458 if (fb) 2459 drm_framebuffer_unreference(fb); 2460 if (plane->old_fb) 2461 drm_framebuffer_unreference(plane->old_fb); 2462 plane->old_fb = NULL; 2463 2464 return ret; 2465 } 2466 2467 static int setplane_internal(struct drm_plane *plane, 2468 struct drm_crtc *crtc, 2469 struct drm_framebuffer *fb, 2470 int32_t crtc_x, int32_t crtc_y, 2471 uint32_t crtc_w, uint32_t crtc_h, 2472 /* src_{x,y,w,h} values are 16.16 fixed point */ 2473 uint32_t src_x, uint32_t src_y, 2474 uint32_t src_w, uint32_t src_h) 2475 { 2476 int ret; 2477 2478 drm_modeset_lock_all(plane->dev); 2479 ret = __setplane_internal(plane, crtc, fb, 2480 crtc_x, crtc_y, crtc_w, crtc_h, 2481 src_x, src_y, src_w, src_h); 2482 drm_modeset_unlock_all(plane->dev); 2483 2484 return ret; 2485 } 2486 2487 /** 2488 * drm_mode_setplane - configure a plane's configuration 2489 * @dev: DRM device 2490 * @data: ioctl data* 2491 * @file_priv: DRM file info 2492 * 2493 * Set plane configuration, including placement, fb, scaling, and other factors. 2494 * Or pass a NULL fb to disable (planes may be disabled without providing a 2495 * valid crtc). 2496 * 2497 * Returns: 2498 * Zero on success, negative errno on failure. 2499 */ 2500 int drm_mode_setplane(struct drm_device *dev, void *data, 2501 struct drm_file *file_priv) 2502 { 2503 struct drm_mode_set_plane *plane_req = data; 2504 struct drm_plane *plane; 2505 struct drm_crtc *crtc = NULL; 2506 struct drm_framebuffer *fb = NULL; 2507 2508 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2509 return -EINVAL; 2510 2511 /* 2512 * First, find the plane, crtc, and fb objects. If not available, 2513 * we don't bother to call the driver. 2514 */ 2515 plane = drm_plane_find(dev, plane_req->plane_id); 2516 if (!plane) { 2517 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2518 plane_req->plane_id); 2519 return -ENOENT; 2520 } 2521 2522 if (plane_req->fb_id) { 2523 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2524 if (!fb) { 2525 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2526 plane_req->fb_id); 2527 return -ENOENT; 2528 } 2529 2530 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2531 if (!crtc) { 2532 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2533 plane_req->crtc_id); 2534 return -ENOENT; 2535 } 2536 } 2537 2538 /* 2539 * setplane_internal will take care of deref'ing either the old or new 2540 * framebuffer depending on success. 2541 */ 2542 return setplane_internal(plane, crtc, fb, 2543 plane_req->crtc_x, plane_req->crtc_y, 2544 plane_req->crtc_w, plane_req->crtc_h, 2545 plane_req->src_x, plane_req->src_y, 2546 plane_req->src_w, plane_req->src_h); 2547 } 2548 2549 /** 2550 * drm_mode_set_config_internal - helper to call ->set_config 2551 * @set: modeset config to set 2552 * 2553 * This is a little helper to wrap internal calls to the ->set_config driver 2554 * interface. The only thing it adds is correct refcounting dance. 2555 * 2556 * Returns: 2557 * Zero on success, negative errno on failure. 2558 */ 2559 int drm_mode_set_config_internal(struct drm_mode_set *set) 2560 { 2561 struct drm_crtc *crtc = set->crtc; 2562 struct drm_framebuffer *fb; 2563 struct drm_crtc *tmp; 2564 int ret; 2565 2566 /* 2567 * NOTE: ->set_config can also disable other crtcs (if we steal all 2568 * connectors from it), hence we need to refcount the fbs across all 2569 * crtcs. Atomic modeset will have saner semantics ... 2570 */ 2571 drm_for_each_crtc(tmp, crtc->dev) 2572 tmp->primary->old_fb = tmp->primary->fb; 2573 2574 fb = set->fb; 2575 2576 ret = crtc->funcs->set_config(set); 2577 if (ret == 0) { 2578 crtc->primary->crtc = crtc; 2579 crtc->primary->fb = fb; 2580 } 2581 2582 drm_for_each_crtc(tmp, crtc->dev) { 2583 if (tmp->primary->fb) 2584 drm_framebuffer_reference(tmp->primary->fb); 2585 if (tmp->primary->old_fb) 2586 drm_framebuffer_unreference(tmp->primary->old_fb); 2587 tmp->primary->old_fb = NULL; 2588 } 2589 2590 return ret; 2591 } 2592 EXPORT_SYMBOL(drm_mode_set_config_internal); 2593 2594 /** 2595 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode 2596 * @mode: mode to query 2597 * @hdisplay: hdisplay value to fill in 2598 * @vdisplay: vdisplay value to fill in 2599 * 2600 * The vdisplay value will be doubled if the specified mode is a stereo mode of 2601 * the appropriate layout. 2602 */ 2603 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, 2604 int *hdisplay, int *vdisplay) 2605 { 2606 struct drm_display_mode adjusted; 2607 2608 drm_mode_copy(&adjusted, mode); 2609 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 2610 *hdisplay = adjusted.crtc_hdisplay; 2611 *vdisplay = adjusted.crtc_vdisplay; 2612 } 2613 EXPORT_SYMBOL(drm_crtc_get_hv_timing); 2614 2615 /** 2616 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2617 * CRTC viewport 2618 * @crtc: CRTC that framebuffer will be displayed on 2619 * @x: x panning 2620 * @y: y panning 2621 * @mode: mode that framebuffer will be displayed under 2622 * @fb: framebuffer to check size of 2623 */ 2624 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2625 int x, int y, 2626 const struct drm_display_mode *mode, 2627 const struct drm_framebuffer *fb) 2628 2629 { 2630 int hdisplay, vdisplay; 2631 2632 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); 2633 2634 if (crtc->state && 2635 crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) | 2636 BIT(DRM_ROTATE_270))) 2637 swap(hdisplay, vdisplay); 2638 2639 return check_src_coords(x << 16, y << 16, 2640 hdisplay << 16, vdisplay << 16, fb); 2641 } 2642 EXPORT_SYMBOL(drm_crtc_check_viewport); 2643 2644 /** 2645 * drm_mode_setcrtc - set CRTC configuration 2646 * @dev: drm device for the ioctl 2647 * @data: data pointer for the ioctl 2648 * @file_priv: drm file for the ioctl call 2649 * 2650 * Build a new CRTC configuration based on user request. 2651 * 2652 * Called by the user via ioctl. 2653 * 2654 * Returns: 2655 * Zero on success, negative errno on failure. 2656 */ 2657 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2658 struct drm_file *file_priv) 2659 { 2660 struct drm_mode_config *config = &dev->mode_config; 2661 struct drm_mode_crtc *crtc_req = data; 2662 struct drm_crtc *crtc; 2663 struct drm_connector **connector_set = NULL, *connector; 2664 struct drm_framebuffer *fb = NULL; 2665 struct drm_display_mode *mode = NULL; 2666 struct drm_mode_set set; 2667 uint32_t __user *set_connectors_ptr; 2668 int ret; 2669 int i; 2670 2671 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2672 return -EINVAL; 2673 2674 /* 2675 * Universal plane src offsets are only 16.16, prevent havoc for 2676 * drivers using universal plane code internally. 2677 */ 2678 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) 2679 return -ERANGE; 2680 2681 drm_modeset_lock_all(dev); 2682 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2683 if (!crtc) { 2684 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2685 ret = -ENOENT; 2686 goto out; 2687 } 2688 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); 2689 2690 if (crtc_req->mode_valid) { 2691 /* If we have a mode we need a framebuffer. */ 2692 /* If we pass -1, set the mode with the currently bound fb */ 2693 if (crtc_req->fb_id == -1) { 2694 if (!crtc->primary->fb) { 2695 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2696 ret = -EINVAL; 2697 goto out; 2698 } 2699 fb = crtc->primary->fb; 2700 /* Make refcounting symmetric with the lookup path. */ 2701 drm_framebuffer_reference(fb); 2702 } else { 2703 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2704 if (!fb) { 2705 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2706 crtc_req->fb_id); 2707 ret = -ENOENT; 2708 goto out; 2709 } 2710 } 2711 2712 mode = drm_mode_create(dev); 2713 if (!mode) { 2714 ret = -ENOMEM; 2715 goto out; 2716 } 2717 2718 ret = drm_mode_convert_umode(mode, &crtc_req->mode); 2719 if (ret) { 2720 DRM_DEBUG_KMS("Invalid mode\n"); 2721 goto out; 2722 } 2723 2724 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 2725 2726 /* 2727 * Check whether the primary plane supports the fb pixel format. 2728 * Drivers not implementing the universal planes API use a 2729 * default formats list provided by the DRM core which doesn't 2730 * match real hardware capabilities. Skip the check in that 2731 * case. 2732 */ 2733 if (!crtc->primary->format_default) { 2734 ret = drm_plane_check_pixel_format(crtc->primary, 2735 fb->pixel_format); 2736 if (ret) { 2737 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2738 drm_get_format_name(fb->pixel_format)); 2739 goto out; 2740 } 2741 } 2742 2743 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2744 mode, fb); 2745 if (ret) 2746 goto out; 2747 2748 } 2749 2750 if (crtc_req->count_connectors == 0 && mode) { 2751 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2752 ret = -EINVAL; 2753 goto out; 2754 } 2755 2756 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2757 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2758 crtc_req->count_connectors); 2759 ret = -EINVAL; 2760 goto out; 2761 } 2762 2763 if (crtc_req->count_connectors > 0) { 2764 u32 out_id; 2765 2766 /* Avoid unbounded kernel memory allocation */ 2767 if (crtc_req->count_connectors > config->num_connector) { 2768 ret = -EINVAL; 2769 goto out; 2770 } 2771 2772 connector_set = kmalloc(crtc_req->count_connectors * 2773 sizeof(struct drm_connector *), 2774 M_DRM, M_WAITOK); 2775 if (!connector_set) { 2776 ret = -ENOMEM; 2777 goto out; 2778 } 2779 2780 for (i = 0; i < crtc_req->count_connectors; i++) { 2781 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2782 if (get_user(out_id, &set_connectors_ptr[i])) { 2783 ret = -EFAULT; 2784 goto out; 2785 } 2786 2787 connector = drm_connector_find(dev, out_id); 2788 if (!connector) { 2789 DRM_DEBUG_KMS("Connector id %d unknown\n", 2790 out_id); 2791 ret = -ENOENT; 2792 goto out; 2793 } 2794 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2795 connector->base.id, 2796 connector->name); 2797 2798 connector_set[i] = connector; 2799 } 2800 } 2801 2802 set.crtc = crtc; 2803 set.x = crtc_req->x; 2804 set.y = crtc_req->y; 2805 set.mode = mode; 2806 set.connectors = connector_set; 2807 set.num_connectors = crtc_req->count_connectors; 2808 set.fb = fb; 2809 ret = drm_mode_set_config_internal(&set); 2810 2811 out: 2812 if (fb) 2813 drm_framebuffer_unreference(fb); 2814 2815 kfree(connector_set); 2816 drm_mode_destroy(dev, mode); 2817 drm_modeset_unlock_all(dev); 2818 return ret; 2819 } 2820 2821 /** 2822 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2823 * universal plane handler call 2824 * @crtc: crtc to update cursor for 2825 * @req: data pointer for the ioctl 2826 * @file_priv: drm file for the ioctl call 2827 * 2828 * Legacy cursor ioctl's work directly with driver buffer handles. To 2829 * translate legacy ioctl calls into universal plane handler calls, we need to 2830 * wrap the native buffer handle in a drm_framebuffer. 2831 * 2832 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2833 * buffer with a pitch of 4*width; the universal plane interface should be used 2834 * directly in cases where the hardware can support other buffer settings and 2835 * userspace wants to make use of these capabilities. 2836 * 2837 * Returns: 2838 * Zero on success, negative errno on failure. 2839 */ 2840 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2841 struct drm_mode_cursor2 *req, 2842 struct drm_file *file_priv) 2843 { 2844 struct drm_device *dev = crtc->dev; 2845 struct drm_framebuffer *fb = NULL; 2846 struct drm_mode_fb_cmd2 fbreq = { 2847 .width = req->width, 2848 .height = req->height, 2849 .pixel_format = DRM_FORMAT_ARGB8888, 2850 .pitches = { req->width * 4 }, 2851 .handles = { req->handle }, 2852 }; 2853 int32_t crtc_x, crtc_y; 2854 uint32_t crtc_w = 0, crtc_h = 0; 2855 uint32_t src_w = 0, src_h = 0; 2856 int ret = 0; 2857 2858 BUG_ON(!crtc->cursor); 2859 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2860 2861 /* 2862 * Obtain fb we'll be using (either new or existing) and take an extra 2863 * reference to it if fb != null. setplane will take care of dropping 2864 * the reference if the plane update fails. 2865 */ 2866 if (req->flags & DRM_MODE_CURSOR_BO) { 2867 if (req->handle) { 2868 fb = internal_framebuffer_create(dev, &fbreq, file_priv); 2869 if (IS_ERR(fb)) { 2870 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2871 return PTR_ERR(fb); 2872 } 2873 } else { 2874 fb = NULL; 2875 } 2876 } else { 2877 fb = crtc->cursor->fb; 2878 if (fb) 2879 drm_framebuffer_reference(fb); 2880 } 2881 2882 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2883 crtc_x = req->x; 2884 crtc_y = req->y; 2885 } else { 2886 crtc_x = crtc->cursor_x; 2887 crtc_y = crtc->cursor_y; 2888 } 2889 2890 if (fb) { 2891 crtc_w = fb->width; 2892 crtc_h = fb->height; 2893 src_w = fb->width << 16; 2894 src_h = fb->height << 16; 2895 } 2896 2897 /* 2898 * setplane_internal will take care of deref'ing either the old or new 2899 * framebuffer depending on success. 2900 */ 2901 ret = __setplane_internal(crtc->cursor, crtc, fb, 2902 crtc_x, crtc_y, crtc_w, crtc_h, 2903 0, 0, src_w, src_h); 2904 2905 /* Update successful; save new cursor position, if necessary */ 2906 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2907 crtc->cursor_x = req->x; 2908 crtc->cursor_y = req->y; 2909 } 2910 2911 return ret; 2912 } 2913 2914 static int drm_mode_cursor_common(struct drm_device *dev, 2915 struct drm_mode_cursor2 *req, 2916 struct drm_file *file_priv) 2917 { 2918 struct drm_crtc *crtc; 2919 int ret = 0; 2920 2921 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2922 return -EINVAL; 2923 2924 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 2925 return -EINVAL; 2926 2927 crtc = drm_crtc_find(dev, req->crtc_id); 2928 if (!crtc) { 2929 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 2930 return -ENOENT; 2931 } 2932 2933 /* 2934 * If this crtc has a universal cursor plane, call that plane's update 2935 * handler rather than using legacy cursor handlers. 2936 */ 2937 drm_modeset_lock_crtc(crtc, crtc->cursor); 2938 if (crtc->cursor) { 2939 ret = drm_mode_cursor_universal(crtc, req, file_priv); 2940 goto out; 2941 } 2942 2943 if (req->flags & DRM_MODE_CURSOR_BO) { 2944 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 2945 ret = -ENXIO; 2946 goto out; 2947 } 2948 /* Turns off the cursor if handle is 0 */ 2949 if (crtc->funcs->cursor_set2) 2950 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 2951 req->width, req->height, req->hot_x, req->hot_y); 2952 else 2953 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 2954 req->width, req->height); 2955 } 2956 2957 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2958 if (crtc->funcs->cursor_move) { 2959 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 2960 } else { 2961 ret = -EFAULT; 2962 goto out; 2963 } 2964 } 2965 out: 2966 drm_modeset_unlock_crtc(crtc); 2967 2968 return ret; 2969 2970 } 2971 2972 2973 /** 2974 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 2975 * @dev: drm device for the ioctl 2976 * @data: data pointer for the ioctl 2977 * @file_priv: drm file for the ioctl call 2978 * 2979 * Set the cursor configuration based on user request. 2980 * 2981 * Called by the user via ioctl. 2982 * 2983 * Returns: 2984 * Zero on success, negative errno on failure. 2985 */ 2986 int drm_mode_cursor_ioctl(struct drm_device *dev, 2987 void *data, struct drm_file *file_priv) 2988 { 2989 struct drm_mode_cursor *req = data; 2990 struct drm_mode_cursor2 new_req; 2991 2992 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 2993 new_req.hot_x = new_req.hot_y = 0; 2994 2995 return drm_mode_cursor_common(dev, &new_req, file_priv); 2996 } 2997 2998 /** 2999 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 3000 * @dev: drm device for the ioctl 3001 * @data: data pointer for the ioctl 3002 * @file_priv: drm file for the ioctl call 3003 * 3004 * Set the cursor configuration based on user request. This implements the 2nd 3005 * version of the cursor ioctl, which allows userspace to additionally specify 3006 * the hotspot of the pointer. 3007 * 3008 * Called by the user via ioctl. 3009 * 3010 * Returns: 3011 * Zero on success, negative errno on failure. 3012 */ 3013 int drm_mode_cursor2_ioctl(struct drm_device *dev, 3014 void *data, struct drm_file *file_priv) 3015 { 3016 struct drm_mode_cursor2 *req = data; 3017 3018 return drm_mode_cursor_common(dev, req, file_priv); 3019 } 3020 3021 /** 3022 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 3023 * @bpp: bits per pixels 3024 * @depth: bit depth per pixel 3025 * 3026 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 3027 * Useful in fbdev emulation code, since that deals in those values. 3028 */ 3029 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 3030 { 3031 uint32_t fmt; 3032 3033 switch (bpp) { 3034 case 8: 3035 fmt = DRM_FORMAT_C8; 3036 break; 3037 case 16: 3038 if (depth == 15) 3039 fmt = DRM_FORMAT_XRGB1555; 3040 else 3041 fmt = DRM_FORMAT_RGB565; 3042 break; 3043 case 24: 3044 fmt = DRM_FORMAT_RGB888; 3045 break; 3046 case 32: 3047 if (depth == 24) 3048 fmt = DRM_FORMAT_XRGB8888; 3049 else if (depth == 30) 3050 fmt = DRM_FORMAT_XRGB2101010; 3051 else 3052 fmt = DRM_FORMAT_ARGB8888; 3053 break; 3054 default: 3055 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3056 fmt = DRM_FORMAT_XRGB8888; 3057 break; 3058 } 3059 3060 return fmt; 3061 } 3062 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3063 3064 /** 3065 * drm_mode_addfb - add an FB to the graphics configuration 3066 * @dev: drm device for the ioctl 3067 * @data: data pointer for the ioctl 3068 * @file_priv: drm file for the ioctl call 3069 * 3070 * Add a new FB to the specified CRTC, given a user request. This is the 3071 * original addfb ioctl which only supported RGB formats. 3072 * 3073 * Called by the user via ioctl. 3074 * 3075 * Returns: 3076 * Zero on success, negative errno on failure. 3077 */ 3078 int drm_mode_addfb(struct drm_device *dev, 3079 void *data, struct drm_file *file_priv) 3080 { 3081 struct drm_mode_fb_cmd *or = data; 3082 struct drm_mode_fb_cmd2 r = {}; 3083 int ret; 3084 3085 /* convert to new format and call new ioctl */ 3086 r.fb_id = or->fb_id; 3087 r.width = or->width; 3088 r.height = or->height; 3089 r.pitches[0] = or->pitch; 3090 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3091 r.handles[0] = or->handle; 3092 3093 ret = drm_mode_addfb2(dev, &r, file_priv); 3094 if (ret) 3095 return ret; 3096 3097 or->fb_id = r.fb_id; 3098 3099 return ret; 3100 } 3101 3102 static int format_check(const struct drm_mode_fb_cmd2 *r) 3103 { 3104 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3105 3106 switch (format) { 3107 case DRM_FORMAT_C8: 3108 case DRM_FORMAT_RGB332: 3109 case DRM_FORMAT_BGR233: 3110 case DRM_FORMAT_XRGB4444: 3111 case DRM_FORMAT_XBGR4444: 3112 case DRM_FORMAT_RGBX4444: 3113 case DRM_FORMAT_BGRX4444: 3114 case DRM_FORMAT_ARGB4444: 3115 case DRM_FORMAT_ABGR4444: 3116 case DRM_FORMAT_RGBA4444: 3117 case DRM_FORMAT_BGRA4444: 3118 case DRM_FORMAT_XRGB1555: 3119 case DRM_FORMAT_XBGR1555: 3120 case DRM_FORMAT_RGBX5551: 3121 case DRM_FORMAT_BGRX5551: 3122 case DRM_FORMAT_ARGB1555: 3123 case DRM_FORMAT_ABGR1555: 3124 case DRM_FORMAT_RGBA5551: 3125 case DRM_FORMAT_BGRA5551: 3126 case DRM_FORMAT_RGB565: 3127 case DRM_FORMAT_BGR565: 3128 case DRM_FORMAT_RGB888: 3129 case DRM_FORMAT_BGR888: 3130 case DRM_FORMAT_XRGB8888: 3131 case DRM_FORMAT_XBGR8888: 3132 case DRM_FORMAT_RGBX8888: 3133 case DRM_FORMAT_BGRX8888: 3134 case DRM_FORMAT_ARGB8888: 3135 case DRM_FORMAT_ABGR8888: 3136 case DRM_FORMAT_RGBA8888: 3137 case DRM_FORMAT_BGRA8888: 3138 case DRM_FORMAT_XRGB2101010: 3139 case DRM_FORMAT_XBGR2101010: 3140 case DRM_FORMAT_RGBX1010102: 3141 case DRM_FORMAT_BGRX1010102: 3142 case DRM_FORMAT_ARGB2101010: 3143 case DRM_FORMAT_ABGR2101010: 3144 case DRM_FORMAT_RGBA1010102: 3145 case DRM_FORMAT_BGRA1010102: 3146 case DRM_FORMAT_YUYV: 3147 case DRM_FORMAT_YVYU: 3148 case DRM_FORMAT_UYVY: 3149 case DRM_FORMAT_VYUY: 3150 case DRM_FORMAT_AYUV: 3151 case DRM_FORMAT_NV12: 3152 case DRM_FORMAT_NV21: 3153 case DRM_FORMAT_NV16: 3154 case DRM_FORMAT_NV61: 3155 case DRM_FORMAT_NV24: 3156 case DRM_FORMAT_NV42: 3157 case DRM_FORMAT_YUV410: 3158 case DRM_FORMAT_YVU410: 3159 case DRM_FORMAT_YUV411: 3160 case DRM_FORMAT_YVU411: 3161 case DRM_FORMAT_YUV420: 3162 case DRM_FORMAT_YVU420: 3163 case DRM_FORMAT_YUV422: 3164 case DRM_FORMAT_YVU422: 3165 case DRM_FORMAT_YUV444: 3166 case DRM_FORMAT_YVU444: 3167 return 0; 3168 default: 3169 DRM_DEBUG_KMS("invalid pixel format %s\n", 3170 drm_get_format_name(r->pixel_format)); 3171 return -EINVAL; 3172 } 3173 } 3174 3175 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3176 { 3177 int ret, hsub, vsub, num_planes, i; 3178 3179 ret = format_check(r); 3180 if (ret) { 3181 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3182 drm_get_format_name(r->pixel_format)); 3183 return ret; 3184 } 3185 3186 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3187 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3188 num_planes = drm_format_num_planes(r->pixel_format); 3189 3190 if (r->width == 0 || r->width % hsub) { 3191 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3192 return -EINVAL; 3193 } 3194 3195 if (r->height == 0 || r->height % vsub) { 3196 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3197 return -EINVAL; 3198 } 3199 3200 for (i = 0; i < num_planes; i++) { 3201 unsigned int width = r->width / (i != 0 ? hsub : 1); 3202 unsigned int height = r->height / (i != 0 ? vsub : 1); 3203 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3204 3205 if (!r->handles[i]) { 3206 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3207 return -EINVAL; 3208 } 3209 3210 if ((uint64_t) width * cpp > UINT_MAX) 3211 return -ERANGE; 3212 3213 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3214 return -ERANGE; 3215 3216 if (r->pitches[i] < width * cpp) { 3217 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3218 return -EINVAL; 3219 } 3220 3221 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { 3222 DRM_DEBUG_KMS("bad fb modifier %lu for plane %d\n", 3223 r->modifier[i], i); 3224 return -EINVAL; 3225 } 3226 3227 /* modifier specific checks: */ 3228 switch (r->modifier[i]) { 3229 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: 3230 /* NOTE: the pitch restriction may be lifted later if it turns 3231 * out that no hw has this restriction: 3232 */ 3233 if (r->pixel_format != DRM_FORMAT_NV12 || 3234 width % 128 || height % 32 || 3235 r->pitches[i] % 128) { 3236 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i); 3237 return -EINVAL; 3238 } 3239 break; 3240 3241 default: 3242 break; 3243 } 3244 } 3245 3246 for (i = num_planes; i < 4; i++) { 3247 if (r->modifier[i]) { 3248 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i); 3249 return -EINVAL; 3250 } 3251 3252 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ 3253 if (!(r->flags & DRM_MODE_FB_MODIFIERS)) 3254 continue; 3255 3256 if (r->handles[i]) { 3257 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i); 3258 return -EINVAL; 3259 } 3260 3261 if (r->pitches[i]) { 3262 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i); 3263 return -EINVAL; 3264 } 3265 3266 if (r->offsets[i]) { 3267 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i); 3268 return -EINVAL; 3269 } 3270 } 3271 3272 return 0; 3273 } 3274 3275 static struct drm_framebuffer * 3276 internal_framebuffer_create(struct drm_device *dev, 3277 const struct drm_mode_fb_cmd2 *r, 3278 struct drm_file *file_priv) 3279 { 3280 struct drm_mode_config *config = &dev->mode_config; 3281 struct drm_framebuffer *fb; 3282 int ret; 3283 3284 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { 3285 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3286 return ERR_PTR(-EINVAL); 3287 } 3288 3289 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3290 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3291 r->width, config->min_width, config->max_width); 3292 return ERR_PTR(-EINVAL); 3293 } 3294 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3295 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3296 r->height, config->min_height, config->max_height); 3297 return ERR_PTR(-EINVAL); 3298 } 3299 3300 if (r->flags & DRM_MODE_FB_MODIFIERS && 3301 !dev->mode_config.allow_fb_modifiers) { 3302 DRM_DEBUG_KMS("driver does not support fb modifiers\n"); 3303 return ERR_PTR(-EINVAL); 3304 } 3305 3306 ret = framebuffer_check(r); 3307 if (ret) 3308 return ERR_PTR(ret); 3309 3310 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3311 if (IS_ERR(fb)) { 3312 DRM_DEBUG_KMS("could not create framebuffer\n"); 3313 return fb; 3314 } 3315 3316 return fb; 3317 } 3318 3319 /** 3320 * drm_mode_addfb2 - add an FB to the graphics configuration 3321 * @dev: drm device for the ioctl 3322 * @data: data pointer for the ioctl 3323 * @file_priv: drm file for the ioctl call 3324 * 3325 * Add a new FB to the specified CRTC, given a user request with format. This is 3326 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3327 * and uses fourcc codes as pixel format specifiers. 3328 * 3329 * Called by the user via ioctl. 3330 * 3331 * Returns: 3332 * Zero on success, negative errno on failure. 3333 */ 3334 int drm_mode_addfb2(struct drm_device *dev, 3335 void *data, struct drm_file *file_priv) 3336 { 3337 struct drm_mode_fb_cmd2 *r = data; 3338 struct drm_framebuffer *fb; 3339 3340 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3341 return -EINVAL; 3342 3343 fb = internal_framebuffer_create(dev, r, file_priv); 3344 if (IS_ERR(fb)) 3345 return PTR_ERR(fb); 3346 3347 /* Transfer ownership to the filp for reaping on close */ 3348 3349 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3350 mutex_lock(&file_priv->fbs_lock); 3351 r->fb_id = fb->base.id; 3352 list_add(&fb->filp_head, &file_priv->fbs); 3353 mutex_unlock(&file_priv->fbs_lock); 3354 3355 return 0; 3356 } 3357 3358 /** 3359 * drm_mode_rmfb - remove an FB from the configuration 3360 * @dev: drm device for the ioctl 3361 * @data: data pointer for the ioctl 3362 * @file_priv: drm file for the ioctl call 3363 * 3364 * Remove the FB specified by the user. 3365 * 3366 * Called by the user via ioctl. 3367 * 3368 * Returns: 3369 * Zero on success, negative errno on failure. 3370 */ 3371 int drm_mode_rmfb(struct drm_device *dev, 3372 void *data, struct drm_file *file_priv) 3373 { 3374 struct drm_framebuffer *fb = NULL; 3375 struct drm_framebuffer *fbl = NULL; 3376 uint32_t *id = data; 3377 int found = 0; 3378 3379 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3380 return -EINVAL; 3381 3382 mutex_lock(&file_priv->fbs_lock); 3383 mutex_lock(&dev->mode_config.fb_lock); 3384 fb = __drm_framebuffer_lookup(dev, *id); 3385 if (!fb) 3386 goto fail_lookup; 3387 3388 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3389 if (fb == fbl) 3390 found = 1; 3391 if (!found) 3392 goto fail_lookup; 3393 3394 list_del_init(&fb->filp_head); 3395 mutex_unlock(&dev->mode_config.fb_lock); 3396 mutex_unlock(&file_priv->fbs_lock); 3397 3398 drm_framebuffer_unreference(fb); 3399 3400 return 0; 3401 3402 fail_lookup: 3403 mutex_unlock(&dev->mode_config.fb_lock); 3404 mutex_unlock(&file_priv->fbs_lock); 3405 3406 return -ENOENT; 3407 } 3408 3409 /** 3410 * drm_mode_getfb - get FB info 3411 * @dev: drm device for the ioctl 3412 * @data: data pointer for the ioctl 3413 * @file_priv: drm file for the ioctl call 3414 * 3415 * Lookup the FB given its ID and return info about it. 3416 * 3417 * Called by the user via ioctl. 3418 * 3419 * Returns: 3420 * Zero on success, negative errno on failure. 3421 */ 3422 int drm_mode_getfb(struct drm_device *dev, 3423 void *data, struct drm_file *file_priv) 3424 { 3425 struct drm_mode_fb_cmd *r = data; 3426 struct drm_framebuffer *fb; 3427 int ret; 3428 3429 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3430 return -EINVAL; 3431 3432 fb = drm_framebuffer_lookup(dev, r->fb_id); 3433 if (!fb) 3434 return -ENOENT; 3435 3436 r->height = fb->height; 3437 r->width = fb->width; 3438 r->depth = fb->depth; 3439 r->bpp = fb->bits_per_pixel; 3440 r->pitch = fb->pitches[0]; 3441 if (fb->funcs->create_handle) { 3442 ret = fb->funcs->create_handle(fb, file_priv, &r->handle); 3443 } else { 3444 ret = -ENODEV; 3445 } 3446 3447 drm_framebuffer_unreference(fb); 3448 3449 return ret; 3450 } 3451 3452 /** 3453 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3454 * @dev: drm device for the ioctl 3455 * @data: data pointer for the ioctl 3456 * @file_priv: drm file for the ioctl call 3457 * 3458 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3459 * rectangle list. Generic userspace which does frontbuffer rendering must call 3460 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3461 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3462 * 3463 * Modesetting drivers which always update the frontbuffer do not need to 3464 * implement the corresponding ->dirty framebuffer callback. 3465 * 3466 * Called by the user via ioctl. 3467 * 3468 * Returns: 3469 * Zero on success, negative errno on failure. 3470 */ 3471 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3472 void *data, struct drm_file *file_priv) 3473 { 3474 struct drm_clip_rect __user *clips_ptr; 3475 struct drm_clip_rect *clips = NULL; 3476 struct drm_mode_fb_dirty_cmd *r = data; 3477 struct drm_framebuffer *fb; 3478 unsigned flags; 3479 int num_clips; 3480 int ret; 3481 3482 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3483 return -EINVAL; 3484 3485 fb = drm_framebuffer_lookup(dev, r->fb_id); 3486 if (!fb) 3487 return -ENOENT; 3488 3489 num_clips = r->num_clips; 3490 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3491 3492 if (!num_clips != !clips_ptr) { 3493 ret = -EINVAL; 3494 goto out_err1; 3495 } 3496 3497 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3498 3499 /* If userspace annotates copy, clips must come in pairs */ 3500 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3501 ret = -EINVAL; 3502 goto out_err1; 3503 } 3504 3505 if (num_clips && clips_ptr) { 3506 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3507 ret = -EINVAL; 3508 goto out_err1; 3509 } 3510 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); 3511 if (!clips) { 3512 ret = -ENOMEM; 3513 goto out_err1; 3514 } 3515 3516 ret = copy_from_user(clips, clips_ptr, 3517 num_clips * sizeof(*clips)); 3518 if (ret) { 3519 ret = -EFAULT; 3520 goto out_err2; 3521 } 3522 } 3523 3524 if (fb->funcs->dirty) { 3525 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3526 clips, num_clips); 3527 } else { 3528 ret = -ENOSYS; 3529 } 3530 3531 out_err2: 3532 kfree(clips); 3533 out_err1: 3534 drm_framebuffer_unreference(fb); 3535 3536 return ret; 3537 } 3538 3539 3540 /** 3541 * drm_fb_release - remove and free the FBs on this file 3542 * @priv: drm file for the ioctl 3543 * 3544 * Destroy all the FBs associated with @filp. 3545 * 3546 * Called by the user via ioctl. 3547 * 3548 * Returns: 3549 * Zero on success, negative errno on failure. 3550 */ 3551 void drm_fb_release(struct drm_file *priv) 3552 { 3553 struct drm_framebuffer *fb, *tfb; 3554 3555 /* 3556 * When the file gets released that means no one else can access the fb 3557 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3558 * avoid upsetting lockdep since the universal cursor code adds a 3559 * framebuffer while holding mutex locks. 3560 * 3561 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3562 * locks is impossible here since no one else but this function can get 3563 * at it any more. 3564 */ 3565 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3566 list_del_init(&fb->filp_head); 3567 3568 /* This drops the fpriv->fbs reference. */ 3569 drm_framebuffer_unreference(fb); 3570 } 3571 } 3572 3573 /** 3574 * drm_property_create - create a new property type 3575 * @dev: drm device 3576 * @flags: flags specifying the property type 3577 * @name: name of the property 3578 * @num_values: number of pre-defined values 3579 * 3580 * This creates a new generic drm property which can then be attached to a drm 3581 * object with drm_object_attach_property. The returned property object must be 3582 * freed with drm_property_destroy. 3583 * 3584 * Note that the DRM core keeps a per-device list of properties and that, if 3585 * drm_mode_config_cleanup() is called, it will destroy all properties created 3586 * by the driver. 3587 * 3588 * Returns: 3589 * A pointer to the newly created property on success, NULL on failure. 3590 */ 3591 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3592 const char *name, int num_values) 3593 { 3594 struct drm_property *property = NULL; 3595 int ret; 3596 3597 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3598 if (!property) 3599 return NULL; 3600 3601 property->dev = dev; 3602 3603 if (num_values) { 3604 property->values = kcalloc(num_values, sizeof(uint64_t), 3605 GFP_KERNEL); 3606 if (!property->values) 3607 goto fail; 3608 } 3609 3610 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3611 if (ret) 3612 goto fail; 3613 3614 property->flags = flags; 3615 property->num_values = num_values; 3616 INIT_LIST_HEAD(&property->enum_list); 3617 3618 if (name) { 3619 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3620 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3621 } 3622 3623 list_add_tail(&property->head, &dev->mode_config.property_list); 3624 3625 WARN_ON(!drm_property_type_valid(property)); 3626 3627 return property; 3628 fail: 3629 kfree(property->values); 3630 kfree(property); 3631 return NULL; 3632 } 3633 EXPORT_SYMBOL(drm_property_create); 3634 3635 /** 3636 * drm_property_create_enum - create a new enumeration property type 3637 * @dev: drm device 3638 * @flags: flags specifying the property type 3639 * @name: name of the property 3640 * @props: enumeration lists with property values 3641 * @num_values: number of pre-defined values 3642 * 3643 * This creates a new generic drm property which can then be attached to a drm 3644 * object with drm_object_attach_property. The returned property object must be 3645 * freed with drm_property_destroy. 3646 * 3647 * Userspace is only allowed to set one of the predefined values for enumeration 3648 * properties. 3649 * 3650 * Returns: 3651 * A pointer to the newly created property on success, NULL on failure. 3652 */ 3653 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3654 const char *name, 3655 const struct drm_prop_enum_list *props, 3656 int num_values) 3657 { 3658 struct drm_property *property; 3659 int i, ret; 3660 3661 flags |= DRM_MODE_PROP_ENUM; 3662 3663 property = drm_property_create(dev, flags, name, num_values); 3664 if (!property) 3665 return NULL; 3666 3667 for (i = 0; i < num_values; i++) { 3668 ret = drm_property_add_enum(property, i, 3669 props[i].type, 3670 props[i].name); 3671 if (ret) { 3672 drm_property_destroy(dev, property); 3673 return NULL; 3674 } 3675 } 3676 3677 return property; 3678 } 3679 EXPORT_SYMBOL(drm_property_create_enum); 3680 3681 /** 3682 * drm_property_create_bitmask - create a new bitmask property type 3683 * @dev: drm device 3684 * @flags: flags specifying the property type 3685 * @name: name of the property 3686 * @props: enumeration lists with property bitflags 3687 * @num_props: size of the @props array 3688 * @supported_bits: bitmask of all supported enumeration values 3689 * 3690 * This creates a new bitmask drm property which can then be attached to a drm 3691 * object with drm_object_attach_property. The returned property object must be 3692 * freed with drm_property_destroy. 3693 * 3694 * Compared to plain enumeration properties userspace is allowed to set any 3695 * or'ed together combination of the predefined property bitflag values 3696 * 3697 * Returns: 3698 * A pointer to the newly created property on success, NULL on failure. 3699 */ 3700 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3701 int flags, const char *name, 3702 const struct drm_prop_enum_list *props, 3703 int num_props, 3704 uint64_t supported_bits) 3705 { 3706 struct drm_property *property; 3707 int i, ret, index = 0; 3708 int num_values = hweight64(supported_bits); 3709 3710 flags |= DRM_MODE_PROP_BITMASK; 3711 3712 property = drm_property_create(dev, flags, name, num_values); 3713 if (!property) 3714 return NULL; 3715 for (i = 0; i < num_props; i++) { 3716 if (!(supported_bits & (1ULL << props[i].type))) 3717 continue; 3718 3719 if (WARN_ON(index >= num_values)) { 3720 drm_property_destroy(dev, property); 3721 return NULL; 3722 } 3723 3724 ret = drm_property_add_enum(property, index++, 3725 props[i].type, 3726 props[i].name); 3727 if (ret) { 3728 drm_property_destroy(dev, property); 3729 return NULL; 3730 } 3731 } 3732 3733 return property; 3734 } 3735 EXPORT_SYMBOL(drm_property_create_bitmask); 3736 3737 static struct drm_property *property_create_range(struct drm_device *dev, 3738 int flags, const char *name, 3739 uint64_t min, uint64_t max) 3740 { 3741 struct drm_property *property; 3742 3743 property = drm_property_create(dev, flags, name, 2); 3744 if (!property) 3745 return NULL; 3746 3747 property->values[0] = min; 3748 property->values[1] = max; 3749 3750 return property; 3751 } 3752 3753 /** 3754 * drm_property_create_range - create a new unsigned ranged property type 3755 * @dev: drm device 3756 * @flags: flags specifying the property type 3757 * @name: name of the property 3758 * @min: minimum value of the property 3759 * @max: maximum value of the property 3760 * 3761 * This creates a new generic drm property which can then be attached to a drm 3762 * object with drm_object_attach_property. The returned property object must be 3763 * freed with drm_property_destroy. 3764 * 3765 * Userspace is allowed to set any unsigned integer value in the (min, max) 3766 * range inclusive. 3767 * 3768 * Returns: 3769 * A pointer to the newly created property on success, NULL on failure. 3770 */ 3771 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3772 const char *name, 3773 uint64_t min, uint64_t max) 3774 { 3775 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3776 name, min, max); 3777 } 3778 EXPORT_SYMBOL(drm_property_create_range); 3779 3780 /** 3781 * drm_property_create_signed_range - create a new signed ranged property type 3782 * @dev: drm device 3783 * @flags: flags specifying the property type 3784 * @name: name of the property 3785 * @min: minimum value of the property 3786 * @max: maximum value of the property 3787 * 3788 * This creates a new generic drm property which can then be attached to a drm 3789 * object with drm_object_attach_property. The returned property object must be 3790 * freed with drm_property_destroy. 3791 * 3792 * Userspace is allowed to set any signed integer value in the (min, max) 3793 * range inclusive. 3794 * 3795 * Returns: 3796 * A pointer to the newly created property on success, NULL on failure. 3797 */ 3798 struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3799 int flags, const char *name, 3800 int64_t min, int64_t max) 3801 { 3802 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3803 name, I642U64(min), I642U64(max)); 3804 } 3805 EXPORT_SYMBOL(drm_property_create_signed_range); 3806 3807 /** 3808 * drm_property_create_object - create a new object property type 3809 * @dev: drm device 3810 * @flags: flags specifying the property type 3811 * @name: name of the property 3812 * @type: object type from DRM_MODE_OBJECT_* defines 3813 * 3814 * This creates a new generic drm property which can then be attached to a drm 3815 * object with drm_object_attach_property. The returned property object must be 3816 * freed with drm_property_destroy. 3817 * 3818 * Userspace is only allowed to set this to any property value of the given 3819 * @type. Only useful for atomic properties, which is enforced. 3820 * 3821 * Returns: 3822 * A pointer to the newly created property on success, NULL on failure. 3823 */ 3824 struct drm_property *drm_property_create_object(struct drm_device *dev, 3825 int flags, const char *name, uint32_t type) 3826 { 3827 struct drm_property *property; 3828 3829 flags |= DRM_MODE_PROP_OBJECT; 3830 3831 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) 3832 return NULL; 3833 3834 property = drm_property_create(dev, flags, name, 1); 3835 if (!property) 3836 return NULL; 3837 3838 property->values[0] = type; 3839 3840 return property; 3841 } 3842 EXPORT_SYMBOL(drm_property_create_object); 3843 3844 /** 3845 * drm_property_create_bool - create a new boolean property type 3846 * @dev: drm device 3847 * @flags: flags specifying the property type 3848 * @name: name of the property 3849 * 3850 * This creates a new generic drm property which can then be attached to a drm 3851 * object with drm_object_attach_property. The returned property object must be 3852 * freed with drm_property_destroy. 3853 * 3854 * This is implemented as a ranged property with only {0, 1} as valid values. 3855 * 3856 * Returns: 3857 * A pointer to the newly created property on success, NULL on failure. 3858 */ 3859 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, 3860 const char *name) 3861 { 3862 return drm_property_create_range(dev, flags, name, 0, 1); 3863 } 3864 EXPORT_SYMBOL(drm_property_create_bool); 3865 3866 /** 3867 * drm_property_add_enum - add a possible value to an enumeration property 3868 * @property: enumeration property to change 3869 * @index: index of the new enumeration 3870 * @value: value of the new enumeration 3871 * @name: symbolic name of the new enumeration 3872 * 3873 * This functions adds enumerations to a property. 3874 * 3875 * It's use is deprecated, drivers should use one of the more specific helpers 3876 * to directly create the property with all enumerations already attached. 3877 * 3878 * Returns: 3879 * Zero on success, error code on failure. 3880 */ 3881 int drm_property_add_enum(struct drm_property *property, int index, 3882 uint64_t value, const char *name) 3883 { 3884 struct drm_property_enum *prop_enum; 3885 3886 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3887 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3888 return -EINVAL; 3889 3890 /* 3891 * Bitmask enum properties have the additional constraint of values 3892 * from 0 to 63 3893 */ 3894 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3895 (value > 63)) 3896 return -EINVAL; 3897 3898 if (!list_empty(&property->enum_list)) { 3899 list_for_each_entry(prop_enum, &property->enum_list, head) { 3900 if (prop_enum->value == value) { 3901 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3902 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3903 return 0; 3904 } 3905 } 3906 } 3907 3908 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3909 if (!prop_enum) 3910 return -ENOMEM; 3911 3912 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3913 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3914 prop_enum->value = value; 3915 3916 property->values[index] = value; 3917 list_add_tail(&prop_enum->head, &property->enum_list); 3918 return 0; 3919 } 3920 EXPORT_SYMBOL(drm_property_add_enum); 3921 3922 /** 3923 * drm_property_destroy - destroy a drm property 3924 * @dev: drm device 3925 * @property: property to destry 3926 * 3927 * This function frees a property including any attached resources like 3928 * enumeration values. 3929 */ 3930 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 3931 { 3932 struct drm_property_enum *prop_enum, *pt; 3933 3934 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 3935 list_del(&prop_enum->head); 3936 kfree(prop_enum); 3937 } 3938 3939 if (property->num_values) 3940 kfree(property->values); 3941 drm_mode_object_put(dev, &property->base); 3942 list_del(&property->head); 3943 kfree(property); 3944 } 3945 EXPORT_SYMBOL(drm_property_destroy); 3946 3947 /** 3948 * drm_object_attach_property - attach a property to a modeset object 3949 * @obj: drm modeset object 3950 * @property: property to attach 3951 * @init_val: initial value of the property 3952 * 3953 * This attaches the given property to the modeset object with the given initial 3954 * value. Currently this function cannot fail since the properties are stored in 3955 * a statically sized array. 3956 */ 3957 void drm_object_attach_property(struct drm_mode_object *obj, 3958 struct drm_property *property, 3959 uint64_t init_val) 3960 { 3961 int count = obj->properties->count; 3962 3963 if (count == DRM_OBJECT_MAX_PROPERTY) { 3964 WARN(1, "Failed to attach object property (type: 0x%x). Please " 3965 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 3966 "you see this message on the same object type.\n", 3967 obj->type); 3968 return; 3969 } 3970 3971 obj->properties->properties[count] = property; 3972 obj->properties->values[count] = init_val; 3973 obj->properties->count++; 3974 if (property->flags & DRM_MODE_PROP_ATOMIC) 3975 obj->properties->atomic_count++; 3976 } 3977 EXPORT_SYMBOL(drm_object_attach_property); 3978 3979 /** 3980 * drm_object_property_set_value - set the value of a property 3981 * @obj: drm mode object to set property value for 3982 * @property: property to set 3983 * @val: value the property should be set to 3984 * 3985 * This functions sets a given property on a given object. This function only 3986 * changes the software state of the property, it does not call into the 3987 * driver's ->set_property callback. 3988 * 3989 * Returns: 3990 * Zero on success, error code on failure. 3991 */ 3992 int drm_object_property_set_value(struct drm_mode_object *obj, 3993 struct drm_property *property, uint64_t val) 3994 { 3995 int i; 3996 3997 for (i = 0; i < obj->properties->count; i++) { 3998 if (obj->properties->properties[i] == property) { 3999 obj->properties->values[i] = val; 4000 return 0; 4001 } 4002 } 4003 4004 return -EINVAL; 4005 } 4006 EXPORT_SYMBOL(drm_object_property_set_value); 4007 4008 /** 4009 * drm_object_property_get_value - retrieve the value of a property 4010 * @obj: drm mode object to get property value from 4011 * @property: property to retrieve 4012 * @val: storage for the property value 4013 * 4014 * This function retrieves the softare state of the given property for the given 4015 * property. Since there is no driver callback to retrieve the current property 4016 * value this might be out of sync with the hardware, depending upon the driver 4017 * and property. 4018 * 4019 * Returns: 4020 * Zero on success, error code on failure. 4021 */ 4022 int drm_object_property_get_value(struct drm_mode_object *obj, 4023 struct drm_property *property, uint64_t *val) 4024 { 4025 int i; 4026 4027 /* read-only properties bypass atomic mechanism and still store 4028 * their value in obj->properties->values[].. mostly to avoid 4029 * having to deal w/ EDID and similar props in atomic paths: 4030 */ 4031 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && 4032 !(property->flags & DRM_MODE_PROP_IMMUTABLE)) 4033 return drm_atomic_get_property(obj, property, val); 4034 4035 for (i = 0; i < obj->properties->count; i++) { 4036 if (obj->properties->properties[i] == property) { 4037 *val = obj->properties->values[i]; 4038 return 0; 4039 } 4040 } 4041 4042 return -EINVAL; 4043 } 4044 EXPORT_SYMBOL(drm_object_property_get_value); 4045 4046 /** 4047 * drm_mode_getproperty_ioctl - get the property metadata 4048 * @dev: DRM device 4049 * @data: ioctl data 4050 * @file_priv: DRM file info 4051 * 4052 * This function retrieves the metadata for a given property, like the different 4053 * possible values for an enum property or the limits for a range property. 4054 * 4055 * Blob properties are special 4056 * 4057 * Called by the user via ioctl. 4058 * 4059 * Returns: 4060 * Zero on success, negative errno on failure. 4061 */ 4062 int drm_mode_getproperty_ioctl(struct drm_device *dev, 4063 void *data, struct drm_file *file_priv) 4064 { 4065 struct drm_mode_get_property *out_resp = data; 4066 struct drm_property *property; 4067 int enum_count = 0; 4068 int value_count = 0; 4069 int ret = 0, i; 4070 int copied; 4071 struct drm_property_enum *prop_enum; 4072 struct drm_mode_property_enum __user *enum_ptr; 4073 uint64_t __user *values_ptr; 4074 4075 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4076 return -EINVAL; 4077 4078 drm_modeset_lock_all(dev); 4079 property = drm_property_find(dev, out_resp->prop_id); 4080 if (!property) { 4081 ret = -ENOENT; 4082 goto done; 4083 } 4084 4085 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4086 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4087 list_for_each_entry(prop_enum, &property->enum_list, head) 4088 enum_count++; 4089 } 4090 4091 value_count = property->num_values; 4092 4093 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 4094 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 4095 out_resp->flags = property->flags; 4096 4097 if ((out_resp->count_values >= value_count) && value_count) { 4098 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 4099 for (i = 0; i < value_count; i++) { 4100 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 4101 ret = -EFAULT; 4102 goto done; 4103 } 4104 } 4105 } 4106 out_resp->count_values = value_count; 4107 4108 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4109 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4110 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 4111 copied = 0; 4112 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 4113 list_for_each_entry(prop_enum, &property->enum_list, head) { 4114 4115 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 4116 ret = -EFAULT; 4117 goto done; 4118 } 4119 4120 if (copy_to_user(&enum_ptr[copied].name, 4121 &prop_enum->name, DRM_PROP_NAME_LEN)) { 4122 ret = -EFAULT; 4123 goto done; 4124 } 4125 copied++; 4126 } 4127 } 4128 out_resp->count_enum_blobs = enum_count; 4129 } 4130 4131 /* 4132 * NOTE: The idea seems to have been to use this to read all the blob 4133 * property values. But nothing ever added them to the corresponding 4134 * list, userspace always used the special-purpose get_blob ioctl to 4135 * read the value for a blob property. It also doesn't make a lot of 4136 * sense to return values here when everything else is just metadata for 4137 * the property itself. 4138 */ 4139 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4140 out_resp->count_enum_blobs = 0; 4141 done: 4142 drm_modeset_unlock_all(dev); 4143 return ret; 4144 } 4145 4146 /** 4147 * drm_property_create_blob - Create new blob property 4148 * 4149 * Creates a new blob property for a specified DRM device, optionally 4150 * copying data. 4151 * 4152 * @dev: DRM device to create property for 4153 * @length: Length to allocate for blob data 4154 * @data: If specified, copies data into blob 4155 * 4156 * Returns: 4157 * New blob property with a single reference on success, or an ERR_PTR 4158 * value on failure. 4159 */ 4160 struct drm_property_blob * 4161 drm_property_create_blob(struct drm_device *dev, size_t length, 4162 const void *data) 4163 { 4164 struct drm_property_blob *blob; 4165 int ret; 4166 4167 if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob)) 4168 return ERR_PTR(-EINVAL); 4169 4170 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4171 if (!blob) 4172 return ERR_PTR(-ENOMEM); 4173 4174 /* This must be explicitly initialised, so we can safely call list_del 4175 * on it in the removal handler, even if it isn't in a file list. */ 4176 INIT_LIST_HEAD(&blob->head_file); 4177 blob->length = length; 4178 blob->dev = dev; 4179 4180 if (data) 4181 memcpy(blob->data, data, length); 4182 4183 mutex_lock(&dev->mode_config.blob_lock); 4184 4185 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 4186 if (ret) { 4187 kfree(blob); 4188 mutex_unlock(&dev->mode_config.blob_lock); 4189 return ERR_PTR(-EINVAL); 4190 } 4191 4192 kref_init(&blob->refcount); 4193 4194 list_add_tail(&blob->head_global, 4195 &dev->mode_config.property_blob_list); 4196 4197 mutex_unlock(&dev->mode_config.blob_lock); 4198 4199 return blob; 4200 } 4201 EXPORT_SYMBOL(drm_property_create_blob); 4202 4203 /** 4204 * drm_property_free_blob - Blob property destructor 4205 * 4206 * Internal free function for blob properties; must not be used directly. 4207 * 4208 * @kref: Reference 4209 */ 4210 static void drm_property_free_blob(struct kref *kref) 4211 { 4212 struct drm_property_blob *blob = 4213 container_of(kref, struct drm_property_blob, refcount); 4214 4215 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock)); 4216 4217 list_del(&blob->head_global); 4218 list_del(&blob->head_file); 4219 drm_mode_object_put(blob->dev, &blob->base); 4220 4221 kfree(blob); 4222 } 4223 4224 /** 4225 * drm_property_unreference_blob - Unreference a blob property 4226 * 4227 * Drop a reference on a blob property. May free the object. 4228 * 4229 * @blob: Pointer to blob property 4230 */ 4231 void drm_property_unreference_blob(struct drm_property_blob *blob) 4232 { 4233 struct drm_device *dev; 4234 4235 if (!blob) 4236 return; 4237 4238 dev = blob->dev; 4239 4240 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4241 4242 if (kref_put_mutex(&blob->refcount, drm_property_free_blob, 4243 &dev->mode_config.blob_lock)) 4244 mutex_unlock(&dev->mode_config.blob_lock); 4245 else 4246 might_lock(&dev->mode_config.blob_lock); 4247 } 4248 EXPORT_SYMBOL(drm_property_unreference_blob); 4249 4250 /** 4251 * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held 4252 * 4253 * Drop a reference on a blob property. May free the object. This must be 4254 * called with blob_lock held. 4255 * 4256 * @blob: Pointer to blob property 4257 */ 4258 static void drm_property_unreference_blob_locked(struct drm_property_blob *blob) 4259 { 4260 if (!blob) 4261 return; 4262 4263 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4264 4265 kref_put(&blob->refcount, drm_property_free_blob); 4266 } 4267 4268 /** 4269 * drm_property_destroy_user_blobs - destroy all blobs created by this client 4270 * @dev: DRM device 4271 * @file_priv: destroy all blobs owned by this file handle 4272 */ 4273 void drm_property_destroy_user_blobs(struct drm_device *dev, 4274 struct drm_file *file_priv) 4275 { 4276 struct drm_property_blob *blob, *bt; 4277 4278 mutex_lock(&dev->mode_config.blob_lock); 4279 4280 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) { 4281 list_del_init(&blob->head_file); 4282 drm_property_unreference_blob_locked(blob); 4283 } 4284 4285 mutex_unlock(&dev->mode_config.blob_lock); 4286 } 4287 4288 /** 4289 * drm_property_reference_blob - Take a reference on an existing property 4290 * 4291 * Take a new reference on an existing blob property. 4292 * 4293 * @blob: Pointer to blob property 4294 */ 4295 struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob) 4296 { 4297 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4298 kref_get(&blob->refcount); 4299 return blob; 4300 } 4301 EXPORT_SYMBOL(drm_property_reference_blob); 4302 4303 /* 4304 * Like drm_property_lookup_blob, but does not return an additional reference. 4305 * Must be called with blob_lock held. 4306 */ 4307 static struct drm_property_blob *__drm_property_lookup_blob(struct drm_device *dev, 4308 uint32_t id) 4309 { 4310 struct drm_mode_object *obj = NULL; 4311 struct drm_property_blob *blob; 4312 4313 WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock)); 4314 4315 mutex_lock(&dev->mode_config.idr_mutex); 4316 obj = idr_find(&dev->mode_config.crtc_idr, id); 4317 if (!obj || (obj->type != DRM_MODE_OBJECT_BLOB) || (obj->id != id)) 4318 blob = NULL; 4319 else 4320 blob = obj_to_blob(obj); 4321 mutex_unlock(&dev->mode_config.idr_mutex); 4322 4323 return blob; 4324 } 4325 4326 /** 4327 * drm_property_lookup_blob - look up a blob property and take a reference 4328 * @dev: drm device 4329 * @id: id of the blob property 4330 * 4331 * If successful, this takes an additional reference to the blob property. 4332 * callers need to make sure to eventually unreference the returned property 4333 * again, using @drm_property_unreference_blob. 4334 */ 4335 struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev, 4336 uint32_t id) 4337 { 4338 struct drm_property_blob *blob; 4339 4340 mutex_lock(&dev->mode_config.blob_lock); 4341 blob = __drm_property_lookup_blob(dev, id); 4342 if (blob) { 4343 if (!kref_get_unless_zero(&blob->refcount)) 4344 blob = NULL; 4345 } 4346 mutex_unlock(&dev->mode_config.blob_lock); 4347 4348 return blob; 4349 } 4350 EXPORT_SYMBOL(drm_property_lookup_blob); 4351 4352 /** 4353 * drm_property_replace_global_blob - atomically replace existing blob property 4354 * @dev: drm device 4355 * @replace: location of blob property pointer to be replaced 4356 * @length: length of data for new blob, or 0 for no data 4357 * @data: content for new blob, or NULL for no data 4358 * @obj_holds_id: optional object for property holding blob ID 4359 * @prop_holds_id: optional property holding blob ID 4360 * @return 0 on success or error on failure 4361 * 4362 * This function will atomically replace a global property in the blob list, 4363 * optionally updating a property which holds the ID of that property. It is 4364 * guaranteed to be atomic: no caller will be allowed to see intermediate 4365 * results, and either the entire operation will succeed and clean up the 4366 * previous property, or it will fail and the state will be unchanged. 4367 * 4368 * If length is 0 or data is NULL, no new blob will be created, and the holding 4369 * property, if specified, will be set to 0. 4370 * 4371 * Access to the replace pointer is assumed to be protected by the caller, e.g. 4372 * by holding the relevant modesetting object lock for its parent. 4373 * 4374 * For example, a drm_connector has a 'PATH' property, which contains the ID 4375 * of a blob property with the value of the MST path information. Calling this 4376 * function with replace pointing to the connector's path_blob_ptr, length and 4377 * data set for the new path information, obj_holds_id set to the connector's 4378 * base object, and prop_holds_id set to the path property name, will perform 4379 * a completely atomic update. The access to path_blob_ptr is protected by the 4380 * caller holding a lock on the connector. 4381 */ 4382 static int drm_property_replace_global_blob(struct drm_device *dev, 4383 struct drm_property_blob **replace, 4384 size_t length, 4385 const void *data, 4386 struct drm_mode_object *obj_holds_id, 4387 struct drm_property *prop_holds_id) 4388 { 4389 struct drm_property_blob *new_blob = NULL; 4390 struct drm_property_blob *old_blob = NULL; 4391 int ret; 4392 4393 WARN_ON(replace == NULL); 4394 4395 old_blob = *replace; 4396 4397 if (length && data) { 4398 new_blob = drm_property_create_blob(dev, length, data); 4399 if (IS_ERR(new_blob)) 4400 return PTR_ERR(new_blob); 4401 } 4402 4403 /* This does not need to be synchronised with blob_lock, as the 4404 * get_properties ioctl locks all modesetting objects, and 4405 * obj_holds_id must be locked before calling here, so we cannot 4406 * have its value out of sync with the list membership modified 4407 * below under blob_lock. */ 4408 if (obj_holds_id) { 4409 ret = drm_object_property_set_value(obj_holds_id, 4410 prop_holds_id, 4411 new_blob ? 4412 new_blob->base.id : 0); 4413 if (ret != 0) 4414 goto err_created; 4415 } 4416 4417 drm_property_unreference_blob(old_blob); 4418 *replace = new_blob; 4419 4420 return 0; 4421 4422 err_created: 4423 drm_property_unreference_blob(new_blob); 4424 return ret; 4425 } 4426 4427 /** 4428 * drm_mode_getblob_ioctl - get the contents of a blob property value 4429 * @dev: DRM device 4430 * @data: ioctl data 4431 * @file_priv: DRM file info 4432 * 4433 * This function retrieves the contents of a blob property. The value stored in 4434 * an object's blob property is just a normal modeset object id. 4435 * 4436 * Called by the user via ioctl. 4437 * 4438 * Returns: 4439 * Zero on success, negative errno on failure. 4440 */ 4441 int drm_mode_getblob_ioctl(struct drm_device *dev, 4442 void *data, struct drm_file *file_priv) 4443 { 4444 struct drm_mode_get_blob *out_resp = data; 4445 struct drm_property_blob *blob; 4446 int ret = 0; 4447 void __user *blob_ptr; 4448 4449 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4450 return -EINVAL; 4451 4452 drm_modeset_lock_all(dev); 4453 mutex_lock(&dev->mode_config.blob_lock); 4454 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4455 if (!blob) { 4456 ret = -ENOENT; 4457 goto done; 4458 } 4459 4460 if (out_resp->length == blob->length) { 4461 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4462 if (copy_to_user(blob_ptr, blob->data, blob->length)) { 4463 ret = -EFAULT; 4464 goto done; 4465 } 4466 } 4467 out_resp->length = blob->length; 4468 4469 done: 4470 mutex_unlock(&dev->mode_config.blob_lock); 4471 drm_modeset_unlock_all(dev); 4472 return ret; 4473 } 4474 4475 /** 4476 * drm_mode_createblob_ioctl - create a new blob property 4477 * @dev: DRM device 4478 * @data: ioctl data 4479 * @file_priv: DRM file info 4480 * 4481 * This function creates a new blob property with user-defined values. In order 4482 * to give us sensible validation and checking when creating, rather than at 4483 * every potential use, we also require a type to be provided upfront. 4484 * 4485 * Called by the user via ioctl. 4486 * 4487 * Returns: 4488 * Zero on success, negative errno on failure. 4489 */ 4490 int drm_mode_createblob_ioctl(struct drm_device *dev, 4491 void *data, struct drm_file *file_priv) 4492 { 4493 struct drm_mode_create_blob *out_resp = data; 4494 struct drm_property_blob *blob; 4495 void __user *blob_ptr; 4496 int ret = 0; 4497 4498 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4499 return -EINVAL; 4500 4501 blob = drm_property_create_blob(dev, out_resp->length, NULL); 4502 if (IS_ERR(blob)) 4503 return PTR_ERR(blob); 4504 4505 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4506 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) { 4507 ret = -EFAULT; 4508 goto out_blob; 4509 } 4510 4511 /* Dropping the lock between create_blob and our access here is safe 4512 * as only the same file_priv can remove the blob; at this point, it is 4513 * not associated with any file_priv. */ 4514 mutex_lock(&dev->mode_config.blob_lock); 4515 out_resp->blob_id = blob->base.id; 4516 list_add_tail(&blob->head_file, &file_priv->blobs); 4517 mutex_unlock(&dev->mode_config.blob_lock); 4518 4519 return 0; 4520 4521 out_blob: 4522 drm_property_unreference_blob(blob); 4523 return ret; 4524 } 4525 4526 /** 4527 * drm_mode_destroyblob_ioctl - destroy a user blob property 4528 * @dev: DRM device 4529 * @data: ioctl data 4530 * @file_priv: DRM file info 4531 * 4532 * Destroy an existing user-defined blob property. 4533 * 4534 * Called by the user via ioctl. 4535 * 4536 * Returns: 4537 * Zero on success, negative errno on failure. 4538 */ 4539 int drm_mode_destroyblob_ioctl(struct drm_device *dev, 4540 void *data, struct drm_file *file_priv) 4541 { 4542 struct drm_mode_destroy_blob *out_resp = data; 4543 struct drm_property_blob *blob = NULL, *bt; 4544 bool found = false; 4545 int ret = 0; 4546 4547 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4548 return -EINVAL; 4549 4550 mutex_lock(&dev->mode_config.blob_lock); 4551 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4552 if (!blob) { 4553 ret = -ENOENT; 4554 goto err; 4555 } 4556 4557 /* Ensure the property was actually created by this user. */ 4558 list_for_each_entry(bt, &file_priv->blobs, head_file) { 4559 if (bt == blob) { 4560 found = true; 4561 break; 4562 } 4563 } 4564 4565 if (!found) { 4566 ret = -EPERM; 4567 goto err; 4568 } 4569 4570 /* We must drop head_file here, because we may not be the last 4571 * reference on the blob. */ 4572 list_del_init(&blob->head_file); 4573 drm_property_unreference_blob_locked(blob); 4574 mutex_unlock(&dev->mode_config.blob_lock); 4575 4576 return 0; 4577 4578 err: 4579 mutex_unlock(&dev->mode_config.blob_lock); 4580 return ret; 4581 } 4582 4583 /** 4584 * drm_mode_connector_set_path_property - set tile property on connector 4585 * @connector: connector to set property on. 4586 * @path: path to use for property; must not be NULL. 4587 * 4588 * This creates a property to expose to userspace to specify a 4589 * connector path. This is mainly used for DisplayPort MST where 4590 * connectors have a topology and we want to allow userspace to give 4591 * them more meaningful names. 4592 * 4593 * Returns: 4594 * Zero on success, negative errno on failure. 4595 */ 4596 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4597 const char *path) 4598 { 4599 struct drm_device *dev = connector->dev; 4600 int ret; 4601 4602 ret = drm_property_replace_global_blob(dev, 4603 &connector->path_blob_ptr, 4604 strlen(path) + 1, 4605 path, 4606 &connector->base, 4607 dev->mode_config.path_property); 4608 return ret; 4609 } 4610 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4611 4612 /** 4613 * drm_mode_connector_set_tile_property - set tile property on connector 4614 * @connector: connector to set property on. 4615 * 4616 * This looks up the tile information for a connector, and creates a 4617 * property for userspace to parse if it exists. The property is of 4618 * the form of 8 integers using ':' as a separator. 4619 * 4620 * Returns: 4621 * Zero on success, errno on failure. 4622 */ 4623 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4624 { 4625 struct drm_device *dev = connector->dev; 4626 char tile[256]; 4627 int ret; 4628 4629 if (!connector->has_tile) { 4630 ret = drm_property_replace_global_blob(dev, 4631 &connector->tile_blob_ptr, 4632 0, 4633 NULL, 4634 &connector->base, 4635 dev->mode_config.tile_property); 4636 return ret; 4637 } 4638 4639 ksnprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4640 connector->tile_group->id, connector->tile_is_single_monitor, 4641 connector->num_h_tile, connector->num_v_tile, 4642 connector->tile_h_loc, connector->tile_v_loc, 4643 connector->tile_h_size, connector->tile_v_size); 4644 4645 ret = drm_property_replace_global_blob(dev, 4646 &connector->tile_blob_ptr, 4647 strlen(tile) + 1, 4648 tile, 4649 &connector->base, 4650 dev->mode_config.tile_property); 4651 return ret; 4652 } 4653 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4654 4655 /** 4656 * drm_mode_connector_update_edid_property - update the edid property of a connector 4657 * @connector: drm connector 4658 * @edid: new value of the edid property 4659 * 4660 * This function creates a new blob modeset object and assigns its id to the 4661 * connector's edid property. 4662 * 4663 * Returns: 4664 * Zero on success, negative errno on failure. 4665 */ 4666 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4667 const struct edid *edid) 4668 { 4669 struct drm_device *dev = connector->dev; 4670 size_t size = 0; 4671 int ret; 4672 4673 /* ignore requests to set edid when overridden */ 4674 if (connector->override_edid) 4675 return 0; 4676 4677 if (edid) 4678 size = EDID_LENGTH * (1 + edid->extensions); 4679 4680 ret = drm_property_replace_global_blob(dev, 4681 &connector->edid_blob_ptr, 4682 size, 4683 edid, 4684 &connector->base, 4685 dev->mode_config.edid_property); 4686 return ret; 4687 } 4688 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4689 4690 /* Some properties could refer to dynamic refcnt'd objects, or things that 4691 * need special locking to handle lifetime issues (ie. to ensure the prop 4692 * value doesn't become invalid part way through the property update due to 4693 * race). The value returned by reference via 'obj' should be passed back 4694 * to drm_property_change_valid_put() after the property is set (and the 4695 * object to which the property is attached has a chance to take it's own 4696 * reference). 4697 */ 4698 bool drm_property_change_valid_get(struct drm_property *property, 4699 uint64_t value, struct drm_mode_object **ref) 4700 { 4701 int i; 4702 4703 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4704 return false; 4705 4706 *ref = NULL; 4707 4708 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4709 if (value < property->values[0] || value > property->values[1]) 4710 return false; 4711 return true; 4712 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4713 int64_t svalue = U642I64(value); 4714 4715 if (svalue < U642I64(property->values[0]) || 4716 svalue > U642I64(property->values[1])) 4717 return false; 4718 return true; 4719 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4720 uint64_t valid_mask = 0; 4721 4722 for (i = 0; i < property->num_values; i++) 4723 valid_mask |= (1ULL << property->values[i]); 4724 return !(value & ~valid_mask); 4725 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4726 struct drm_property_blob *blob; 4727 4728 if (value == 0) 4729 return true; 4730 4731 blob = drm_property_lookup_blob(property->dev, value); 4732 if (blob) { 4733 *ref = &blob->base; 4734 return true; 4735 } else { 4736 return false; 4737 } 4738 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4739 /* a zero value for an object property translates to null: */ 4740 if (value == 0) 4741 return true; 4742 4743 /* handle refcnt'd objects specially: */ 4744 if (property->values[0] == DRM_MODE_OBJECT_FB) { 4745 struct drm_framebuffer *fb; 4746 fb = drm_framebuffer_lookup(property->dev, value); 4747 if (fb) { 4748 *ref = &fb->base; 4749 return true; 4750 } else { 4751 return false; 4752 } 4753 } else { 4754 return _object_find(property->dev, value, property->values[0]) != NULL; 4755 } 4756 } 4757 4758 for (i = 0; i < property->num_values; i++) 4759 if (property->values[i] == value) 4760 return true; 4761 return false; 4762 } 4763 4764 void drm_property_change_valid_put(struct drm_property *property, 4765 struct drm_mode_object *ref) 4766 { 4767 if (!ref) 4768 return; 4769 4770 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4771 if (property->values[0] == DRM_MODE_OBJECT_FB) 4772 drm_framebuffer_unreference(obj_to_fb(ref)); 4773 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4774 drm_property_unreference_blob(obj_to_blob(ref)); 4775 } 4776 4777 /** 4778 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4779 * @dev: DRM device 4780 * @data: ioctl data 4781 * @file_priv: DRM file info 4782 * 4783 * This function sets the current value for a connectors's property. It also 4784 * calls into a driver's ->set_property callback to update the hardware state 4785 * 4786 * Called by the user via ioctl. 4787 * 4788 * Returns: 4789 * Zero on success, negative errno on failure. 4790 */ 4791 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4792 void *data, struct drm_file *file_priv) 4793 { 4794 struct drm_mode_connector_set_property *conn_set_prop = data; 4795 struct drm_mode_obj_set_property obj_set_prop = { 4796 .value = conn_set_prop->value, 4797 .prop_id = conn_set_prop->prop_id, 4798 .obj_id = conn_set_prop->connector_id, 4799 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4800 }; 4801 4802 /* It does all the locking and checking we need */ 4803 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4804 } 4805 4806 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4807 struct drm_property *property, 4808 uint64_t value) 4809 { 4810 int ret = -EINVAL; 4811 struct drm_connector *connector = obj_to_connector(obj); 4812 4813 /* Do DPMS ourselves */ 4814 if (property == connector->dev->mode_config.dpms_property) { 4815 ret = (*connector->funcs->dpms)(connector, (int)value); 4816 } else if (connector->funcs->set_property) 4817 ret = connector->funcs->set_property(connector, property, value); 4818 4819 /* store the property value if successful */ 4820 if (!ret) 4821 drm_object_property_set_value(&connector->base, property, value); 4822 return ret; 4823 } 4824 4825 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4826 struct drm_property *property, 4827 uint64_t value) 4828 { 4829 int ret = -EINVAL; 4830 struct drm_crtc *crtc = obj_to_crtc(obj); 4831 4832 if (crtc->funcs->set_property) 4833 ret = crtc->funcs->set_property(crtc, property, value); 4834 if (!ret) 4835 drm_object_property_set_value(obj, property, value); 4836 4837 return ret; 4838 } 4839 4840 /** 4841 * drm_mode_plane_set_obj_prop - set the value of a property 4842 * @plane: drm plane object to set property value for 4843 * @property: property to set 4844 * @value: value the property should be set to 4845 * 4846 * This functions sets a given property on a given plane object. This function 4847 * calls the driver's ->set_property callback and changes the software state of 4848 * the property if the callback succeeds. 4849 * 4850 * Returns: 4851 * Zero on success, error code on failure. 4852 */ 4853 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4854 struct drm_property *property, 4855 uint64_t value) 4856 { 4857 int ret = -EINVAL; 4858 struct drm_mode_object *obj = &plane->base; 4859 4860 if (plane->funcs->set_property) 4861 ret = plane->funcs->set_property(plane, property, value); 4862 if (!ret) 4863 drm_object_property_set_value(obj, property, value); 4864 4865 return ret; 4866 } 4867 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4868 4869 /** 4870 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 4871 * @dev: DRM device 4872 * @data: ioctl data 4873 * @file_priv: DRM file info 4874 * 4875 * This function retrieves the current value for an object's property. Compared 4876 * to the connector specific ioctl this one is extended to also work on crtc and 4877 * plane objects. 4878 * 4879 * Called by the user via ioctl. 4880 * 4881 * Returns: 4882 * Zero on success, negative errno on failure. 4883 */ 4884 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4885 struct drm_file *file_priv) 4886 { 4887 struct drm_mode_obj_get_properties *arg = data; 4888 struct drm_mode_object *obj; 4889 int ret = 0; 4890 4891 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4892 return -EINVAL; 4893 4894 drm_modeset_lock_all(dev); 4895 4896 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4897 if (!obj) { 4898 ret = -ENOENT; 4899 goto out; 4900 } 4901 if (!obj->properties) { 4902 ret = -EINVAL; 4903 goto out; 4904 } 4905 4906 ret = get_properties(obj, file_priv->atomic, 4907 (uint32_t __user *)(unsigned long)(arg->props_ptr), 4908 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), 4909 &arg->count_props); 4910 4911 out: 4912 drm_modeset_unlock_all(dev); 4913 return ret; 4914 } 4915 4916 /** 4917 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 4918 * @dev: DRM device 4919 * @data: ioctl data 4920 * @file_priv: DRM file info 4921 * 4922 * This function sets the current value for an object's property. It also calls 4923 * into a driver's ->set_property callback to update the hardware state. 4924 * Compared to the connector specific ioctl this one is extended to also work on 4925 * crtc and plane objects. 4926 * 4927 * Called by the user via ioctl. 4928 * 4929 * Returns: 4930 * Zero on success, negative errno on failure. 4931 */ 4932 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 4933 struct drm_file *file_priv) 4934 { 4935 struct drm_mode_obj_set_property *arg = data; 4936 struct drm_mode_object *arg_obj; 4937 struct drm_mode_object *prop_obj; 4938 struct drm_property *property; 4939 int i, ret = -EINVAL; 4940 struct drm_mode_object *ref; 4941 4942 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4943 return -EINVAL; 4944 4945 drm_modeset_lock_all(dev); 4946 4947 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4948 if (!arg_obj) { 4949 ret = -ENOENT; 4950 goto out; 4951 } 4952 if (!arg_obj->properties) 4953 goto out; 4954 4955 for (i = 0; i < arg_obj->properties->count; i++) 4956 if (arg_obj->properties->properties[i]->base.id == arg->prop_id) 4957 break; 4958 4959 if (i == arg_obj->properties->count) 4960 goto out; 4961 4962 prop_obj = drm_mode_object_find(dev, arg->prop_id, 4963 DRM_MODE_OBJECT_PROPERTY); 4964 if (!prop_obj) { 4965 ret = -ENOENT; 4966 goto out; 4967 } 4968 property = obj_to_property(prop_obj); 4969 4970 if (!drm_property_change_valid_get(property, arg->value, &ref)) 4971 goto out; 4972 4973 switch (arg_obj->type) { 4974 case DRM_MODE_OBJECT_CONNECTOR: 4975 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 4976 arg->value); 4977 break; 4978 case DRM_MODE_OBJECT_CRTC: 4979 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 4980 break; 4981 case DRM_MODE_OBJECT_PLANE: 4982 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 4983 property, arg->value); 4984 break; 4985 } 4986 4987 drm_property_change_valid_put(property, ref); 4988 4989 out: 4990 drm_modeset_unlock_all(dev); 4991 return ret; 4992 } 4993 4994 /** 4995 * drm_mode_connector_attach_encoder - attach a connector to an encoder 4996 * @connector: connector to attach 4997 * @encoder: encoder to attach @connector to 4998 * 4999 * This function links up a connector to an encoder. Note that the routing 5000 * restrictions between encoders and crtcs are exposed to userspace through the 5001 * possible_clones and possible_crtcs bitmasks. 5002 * 5003 * Returns: 5004 * Zero on success, negative errno on failure. 5005 */ 5006 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 5007 struct drm_encoder *encoder) 5008 { 5009 int i; 5010 5011 /* 5012 * In the past, drivers have attempted to model the static association 5013 * of connector to encoder in simple connector/encoder devices using a 5014 * direct assignment of connector->encoder = encoder. This connection 5015 * is a logical one and the responsibility of the core, so drivers are 5016 * expected not to mess with this. 5017 * 5018 * Note that the error return should've been enough here, but a large 5019 * majority of drivers ignores the return value, so add in a big WARN 5020 * to get people's attention. 5021 */ 5022 if (WARN_ON(connector->encoder)) 5023 return -EINVAL; 5024 5025 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 5026 if (connector->encoder_ids[i] == 0) { 5027 connector->encoder_ids[i] = encoder->base.id; 5028 return 0; 5029 } 5030 } 5031 return -ENOMEM; 5032 } 5033 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 5034 5035 /** 5036 * drm_mode_crtc_set_gamma_size - set the gamma table size 5037 * @crtc: CRTC to set the gamma table size for 5038 * @gamma_size: size of the gamma table 5039 * 5040 * Drivers which support gamma tables should set this to the supported gamma 5041 * table size when initializing the CRTC. Currently the drm core only supports a 5042 * fixed gamma table size. 5043 * 5044 * Returns: 5045 * Zero on success, negative errno on failure. 5046 */ 5047 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 5048 int gamma_size) 5049 { 5050 crtc->gamma_size = gamma_size; 5051 5052 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, 5053 GFP_KERNEL); 5054 if (!crtc->gamma_store) { 5055 crtc->gamma_size = 0; 5056 return -ENOMEM; 5057 } 5058 5059 return 0; 5060 } 5061 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 5062 5063 /** 5064 * drm_mode_gamma_set_ioctl - set the gamma table 5065 * @dev: DRM device 5066 * @data: ioctl data 5067 * @file_priv: DRM file info 5068 * 5069 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 5070 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 5071 * 5072 * Called by the user via ioctl. 5073 * 5074 * Returns: 5075 * Zero on success, negative errno on failure. 5076 */ 5077 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 5078 void *data, struct drm_file *file_priv) 5079 { 5080 struct drm_mode_crtc_lut *crtc_lut = data; 5081 struct drm_crtc *crtc; 5082 void *r_base, *g_base, *b_base; 5083 int size; 5084 int ret = 0; 5085 5086 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5087 return -EINVAL; 5088 5089 drm_modeset_lock_all(dev); 5090 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5091 if (!crtc) { 5092 ret = -ENOENT; 5093 goto out; 5094 } 5095 5096 if (crtc->funcs->gamma_set == NULL) { 5097 ret = -ENOSYS; 5098 goto out; 5099 } 5100 5101 /* memcpy into gamma store */ 5102 if (crtc_lut->gamma_size != crtc->gamma_size) { 5103 ret = -EINVAL; 5104 goto out; 5105 } 5106 5107 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5108 r_base = crtc->gamma_store; 5109 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 5110 ret = -EFAULT; 5111 goto out; 5112 } 5113 5114 g_base = (char *)r_base + size; 5115 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 5116 ret = -EFAULT; 5117 goto out; 5118 } 5119 5120 b_base = (char *)g_base + size; 5121 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 5122 ret = -EFAULT; 5123 goto out; 5124 } 5125 5126 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 5127 5128 out: 5129 drm_modeset_unlock_all(dev); 5130 return ret; 5131 5132 } 5133 5134 /** 5135 * drm_mode_gamma_get_ioctl - get the gamma table 5136 * @dev: DRM device 5137 * @data: ioctl data 5138 * @file_priv: DRM file info 5139 * 5140 * Copy the current gamma table into the storage provided. This also provides 5141 * the gamma table size the driver expects, which can be used to size the 5142 * allocated storage. 5143 * 5144 * Called by the user via ioctl. 5145 * 5146 * Returns: 5147 * Zero on success, negative errno on failure. 5148 */ 5149 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 5150 void *data, struct drm_file *file_priv) 5151 { 5152 struct drm_mode_crtc_lut *crtc_lut = data; 5153 struct drm_crtc *crtc; 5154 void *r_base, *g_base, *b_base; 5155 int size; 5156 int ret = 0; 5157 5158 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5159 return -EINVAL; 5160 5161 drm_modeset_lock_all(dev); 5162 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5163 if (!crtc) { 5164 ret = -ENOENT; 5165 goto out; 5166 } 5167 5168 /* memcpy into gamma store */ 5169 if (crtc_lut->gamma_size != crtc->gamma_size) { 5170 ret = -EINVAL; 5171 goto out; 5172 } 5173 5174 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5175 r_base = crtc->gamma_store; 5176 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 5177 ret = -EFAULT; 5178 goto out; 5179 } 5180 5181 g_base = (char *)r_base + size; 5182 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 5183 ret = -EFAULT; 5184 goto out; 5185 } 5186 5187 b_base = (char *)g_base + size; 5188 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 5189 ret = -EFAULT; 5190 goto out; 5191 } 5192 out: 5193 drm_modeset_unlock_all(dev); 5194 return ret; 5195 } 5196 5197 #ifdef __DragonFly__ 5198 /* 5199 * The Linux layer version of kfree() is a macro and can't be called 5200 * directly via a function pointer 5201 */ 5202 static void 5203 drm_crtc_event_destroy(struct drm_pending_event *e) 5204 { 5205 kfree(e); 5206 } 5207 #endif 5208 5209 /** 5210 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 5211 * @dev: DRM device 5212 * @data: ioctl data 5213 * @file_priv: DRM file info 5214 * 5215 * This schedules an asynchronous update on a given CRTC, called page flip. 5216 * Optionally a drm event is generated to signal the completion of the event. 5217 * Generic drivers cannot assume that a pageflip with changed framebuffer 5218 * properties (including driver specific metadata like tiling layout) will work, 5219 * but some drivers support e.g. pixel format changes through the pageflip 5220 * ioctl. 5221 * 5222 * Called by the user via ioctl. 5223 * 5224 * Returns: 5225 * Zero on success, negative errno on failure. 5226 */ 5227 int drm_mode_page_flip_ioctl(struct drm_device *dev, 5228 void *data, struct drm_file *file_priv) 5229 { 5230 struct drm_mode_crtc_page_flip *page_flip = data; 5231 struct drm_crtc *crtc; 5232 struct drm_framebuffer *fb = NULL; 5233 struct drm_pending_vblank_event *e = NULL; 5234 unsigned long flags; 5235 int ret = -EINVAL; 5236 5237 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 5238 page_flip->reserved != 0) 5239 return -EINVAL; 5240 5241 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 5242 return -EINVAL; 5243 5244 crtc = drm_crtc_find(dev, page_flip->crtc_id); 5245 if (!crtc) 5246 return -ENOENT; 5247 5248 drm_modeset_lock_crtc(crtc, crtc->primary); 5249 if (crtc->primary->fb == NULL) { 5250 /* The framebuffer is currently unbound, presumably 5251 * due to a hotplug event, that userspace has not 5252 * yet discovered. 5253 */ 5254 ret = -EBUSY; 5255 goto out; 5256 } 5257 5258 if (crtc->funcs->page_flip == NULL) 5259 goto out; 5260 5261 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 5262 if (!fb) { 5263 ret = -ENOENT; 5264 goto out; 5265 } 5266 5267 if (crtc->state) { 5268 const struct drm_plane_state *state = crtc->primary->state; 5269 5270 ret = check_src_coords(state->src_x, state->src_y, 5271 state->src_w, state->src_h, fb); 5272 } else { 5273 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 5274 } 5275 if (ret) 5276 goto out; 5277 5278 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 5279 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 5280 ret = -EINVAL; 5281 goto out; 5282 } 5283 5284 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5285 ret = -ENOMEM; 5286 spin_lock_irqsave(&dev->event_lock, flags); 5287 if (file_priv->event_space < sizeof(e->event)) { 5288 spin_unlock_irqrestore(&dev->event_lock, flags); 5289 goto out; 5290 } 5291 file_priv->event_space -= sizeof(e->event); 5292 spin_unlock_irqrestore(&dev->event_lock, flags); 5293 5294 e = kzalloc(sizeof(*e), GFP_KERNEL); 5295 if (e == NULL) { 5296 spin_lock_irqsave(&dev->event_lock, flags); 5297 file_priv->event_space += sizeof(e->event); 5298 spin_unlock_irqrestore(&dev->event_lock, flags); 5299 goto out; 5300 } 5301 5302 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 5303 e->event.base.length = sizeof(e->event); 5304 e->event.user_data = page_flip->user_data; 5305 e->base.event = &e->event.base; 5306 e->base.file_priv = file_priv; 5307 #ifdef __DragonFly__ 5308 e->base.destroy = drm_crtc_event_destroy; 5309 #else 5310 e->base.destroy = 5311 (void (*) (struct drm_pending_event *)) kfree; 5312 #endif 5313 } 5314 5315 crtc->primary->old_fb = crtc->primary->fb; 5316 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 5317 if (ret) { 5318 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5319 spin_lock_irqsave(&dev->event_lock, flags); 5320 file_priv->event_space += sizeof(e->event); 5321 spin_unlock_irqrestore(&dev->event_lock, flags); 5322 kfree(e); 5323 } 5324 /* Keep the old fb, don't unref it. */ 5325 crtc->primary->old_fb = NULL; 5326 } else { 5327 crtc->primary->fb = fb; 5328 /* Unref only the old framebuffer. */ 5329 fb = NULL; 5330 } 5331 5332 out: 5333 if (fb) 5334 drm_framebuffer_unreference(fb); 5335 if (crtc->primary->old_fb) 5336 drm_framebuffer_unreference(crtc->primary->old_fb); 5337 crtc->primary->old_fb = NULL; 5338 drm_modeset_unlock_crtc(crtc); 5339 5340 return ret; 5341 } 5342 5343 /** 5344 * drm_mode_config_reset - call ->reset callbacks 5345 * @dev: drm device 5346 * 5347 * This functions calls all the crtc's, encoder's and connector's ->reset 5348 * callback. Drivers can use this in e.g. their driver load or resume code to 5349 * reset hardware and software state. 5350 */ 5351 void drm_mode_config_reset(struct drm_device *dev) 5352 { 5353 struct drm_crtc *crtc; 5354 struct drm_plane *plane; 5355 struct drm_encoder *encoder; 5356 struct drm_connector *connector; 5357 5358 drm_for_each_plane(plane, dev) 5359 if (plane->funcs->reset) 5360 plane->funcs->reset(plane); 5361 5362 drm_for_each_crtc(crtc, dev) 5363 if (crtc->funcs->reset) 5364 crtc->funcs->reset(crtc); 5365 5366 drm_for_each_encoder(encoder, dev) 5367 if (encoder->funcs->reset) 5368 encoder->funcs->reset(encoder); 5369 5370 mutex_lock(&dev->mode_config.mutex); 5371 drm_for_each_connector(connector, dev) { 5372 connector->status = connector_status_unknown; 5373 5374 if (connector->funcs->reset) 5375 connector->funcs->reset(connector); 5376 } 5377 mutex_unlock(&dev->mode_config.mutex); 5378 } 5379 EXPORT_SYMBOL(drm_mode_config_reset); 5380 5381 /** 5382 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 5383 * @dev: DRM device 5384 * @data: ioctl data 5385 * @file_priv: DRM file info 5386 * 5387 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 5388 * TTM or something else entirely) and returns the resulting buffer handle. This 5389 * handle can then be wrapped up into a framebuffer modeset object. 5390 * 5391 * Note that userspace is not allowed to use such objects for render 5392 * acceleration - drivers must create their own private ioctls for such a use 5393 * case. 5394 * 5395 * Called by the user via ioctl. 5396 * 5397 * Returns: 5398 * Zero on success, negative errno on failure. 5399 */ 5400 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 5401 void *data, struct drm_file *file_priv) 5402 { 5403 struct drm_mode_create_dumb *args = data; 5404 u32 cpp, stride, size; 5405 5406 if (!dev->driver->dumb_create) 5407 return -ENOSYS; 5408 if (!args->width || !args->height || !args->bpp) 5409 return -EINVAL; 5410 5411 /* overflow checks for 32bit size calculations */ 5412 /* NOTE: DIV_ROUND_UP() can overflow */ 5413 cpp = DIV_ROUND_UP(args->bpp, 8); 5414 if (!cpp || cpp > 0xffffffffU / args->width) 5415 return -EINVAL; 5416 stride = cpp * args->width; 5417 if (args->height > 0xffffffffU / stride) 5418 return -EINVAL; 5419 5420 /* test for wrap-around */ 5421 size = args->height * stride; 5422 if (PAGE_ALIGN(size) == 0) 5423 return -EINVAL; 5424 5425 /* 5426 * handle, pitch and size are output parameters. Zero them out to 5427 * prevent drivers from accidentally using uninitialized data. Since 5428 * not all existing userspace is clearing these fields properly we 5429 * cannot reject IOCTL with garbage in them. 5430 */ 5431 args->handle = 0; 5432 args->pitch = 0; 5433 args->size = 0; 5434 5435 return dev->driver->dumb_create(file_priv, dev, args); 5436 } 5437 5438 /** 5439 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 5440 * @dev: DRM device 5441 * @data: ioctl data 5442 * @file_priv: DRM file info 5443 * 5444 * Allocate an offset in the drm device node's address space to be able to 5445 * memory map a dumb buffer. 5446 * 5447 * Called by the user via ioctl. 5448 * 5449 * Returns: 5450 * Zero on success, negative errno on failure. 5451 */ 5452 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 5453 void *data, struct drm_file *file_priv) 5454 { 5455 struct drm_mode_map_dumb *args = data; 5456 5457 /* call driver ioctl to get mmap offset */ 5458 if (!dev->driver->dumb_map_offset) 5459 return -ENOSYS; 5460 5461 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 5462 } 5463 5464 /** 5465 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 5466 * @dev: DRM device 5467 * @data: ioctl data 5468 * @file_priv: DRM file info 5469 * 5470 * This destroys the userspace handle for the given dumb backing storage buffer. 5471 * Since buffer objects must be reference counted in the kernel a buffer object 5472 * won't be immediately freed if a framebuffer modeset object still uses it. 5473 * 5474 * Called by the user via ioctl. 5475 * 5476 * Returns: 5477 * Zero on success, negative errno on failure. 5478 */ 5479 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 5480 void *data, struct drm_file *file_priv) 5481 { 5482 struct drm_mode_destroy_dumb *args = data; 5483 5484 if (!dev->driver->dumb_destroy) 5485 return -ENOSYS; 5486 5487 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 5488 } 5489 5490 /** 5491 * drm_fb_get_bpp_depth - get the bpp/depth values for format 5492 * @format: pixel format (DRM_FORMAT_*) 5493 * @depth: storage for the depth value 5494 * @bpp: storage for the bpp value 5495 * 5496 * This only supports RGB formats here for compat with code that doesn't use 5497 * pixel formats directly yet. 5498 */ 5499 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 5500 int *bpp) 5501 { 5502 switch (format) { 5503 case DRM_FORMAT_C8: 5504 case DRM_FORMAT_RGB332: 5505 case DRM_FORMAT_BGR233: 5506 *depth = 8; 5507 *bpp = 8; 5508 break; 5509 case DRM_FORMAT_XRGB1555: 5510 case DRM_FORMAT_XBGR1555: 5511 case DRM_FORMAT_RGBX5551: 5512 case DRM_FORMAT_BGRX5551: 5513 case DRM_FORMAT_ARGB1555: 5514 case DRM_FORMAT_ABGR1555: 5515 case DRM_FORMAT_RGBA5551: 5516 case DRM_FORMAT_BGRA5551: 5517 *depth = 15; 5518 *bpp = 16; 5519 break; 5520 case DRM_FORMAT_RGB565: 5521 case DRM_FORMAT_BGR565: 5522 *depth = 16; 5523 *bpp = 16; 5524 break; 5525 case DRM_FORMAT_RGB888: 5526 case DRM_FORMAT_BGR888: 5527 *depth = 24; 5528 *bpp = 24; 5529 break; 5530 case DRM_FORMAT_XRGB8888: 5531 case DRM_FORMAT_XBGR8888: 5532 case DRM_FORMAT_RGBX8888: 5533 case DRM_FORMAT_BGRX8888: 5534 *depth = 24; 5535 *bpp = 32; 5536 break; 5537 case DRM_FORMAT_XRGB2101010: 5538 case DRM_FORMAT_XBGR2101010: 5539 case DRM_FORMAT_RGBX1010102: 5540 case DRM_FORMAT_BGRX1010102: 5541 case DRM_FORMAT_ARGB2101010: 5542 case DRM_FORMAT_ABGR2101010: 5543 case DRM_FORMAT_RGBA1010102: 5544 case DRM_FORMAT_BGRA1010102: 5545 *depth = 30; 5546 *bpp = 32; 5547 break; 5548 case DRM_FORMAT_ARGB8888: 5549 case DRM_FORMAT_ABGR8888: 5550 case DRM_FORMAT_RGBA8888: 5551 case DRM_FORMAT_BGRA8888: 5552 *depth = 32; 5553 *bpp = 32; 5554 break; 5555 default: 5556 DRM_DEBUG_KMS("unsupported pixel format %s\n", 5557 drm_get_format_name(format)); 5558 *depth = 0; 5559 *bpp = 0; 5560 break; 5561 } 5562 } 5563 EXPORT_SYMBOL(drm_fb_get_bpp_depth); 5564 5565 /** 5566 * drm_format_num_planes - get the number of planes for format 5567 * @format: pixel format (DRM_FORMAT_*) 5568 * 5569 * Returns: 5570 * The number of planes used by the specified pixel format. 5571 */ 5572 int drm_format_num_planes(uint32_t format) 5573 { 5574 switch (format) { 5575 case DRM_FORMAT_YUV410: 5576 case DRM_FORMAT_YVU410: 5577 case DRM_FORMAT_YUV411: 5578 case DRM_FORMAT_YVU411: 5579 case DRM_FORMAT_YUV420: 5580 case DRM_FORMAT_YVU420: 5581 case DRM_FORMAT_YUV422: 5582 case DRM_FORMAT_YVU422: 5583 case DRM_FORMAT_YUV444: 5584 case DRM_FORMAT_YVU444: 5585 return 3; 5586 case DRM_FORMAT_NV12: 5587 case DRM_FORMAT_NV21: 5588 case DRM_FORMAT_NV16: 5589 case DRM_FORMAT_NV61: 5590 case DRM_FORMAT_NV24: 5591 case DRM_FORMAT_NV42: 5592 return 2; 5593 default: 5594 return 1; 5595 } 5596 } 5597 EXPORT_SYMBOL(drm_format_num_planes); 5598 5599 /** 5600 * drm_format_plane_cpp - determine the bytes per pixel value 5601 * @format: pixel format (DRM_FORMAT_*) 5602 * @plane: plane index 5603 * 5604 * Returns: 5605 * The bytes per pixel value for the specified plane. 5606 */ 5607 int drm_format_plane_cpp(uint32_t format, int plane) 5608 { 5609 unsigned int depth; 5610 int bpp; 5611 5612 if (plane >= drm_format_num_planes(format)) 5613 return 0; 5614 5615 switch (format) { 5616 case DRM_FORMAT_YUYV: 5617 case DRM_FORMAT_YVYU: 5618 case DRM_FORMAT_UYVY: 5619 case DRM_FORMAT_VYUY: 5620 return 2; 5621 case DRM_FORMAT_NV12: 5622 case DRM_FORMAT_NV21: 5623 case DRM_FORMAT_NV16: 5624 case DRM_FORMAT_NV61: 5625 case DRM_FORMAT_NV24: 5626 case DRM_FORMAT_NV42: 5627 return plane ? 2 : 1; 5628 case DRM_FORMAT_YUV410: 5629 case DRM_FORMAT_YVU410: 5630 case DRM_FORMAT_YUV411: 5631 case DRM_FORMAT_YVU411: 5632 case DRM_FORMAT_YUV420: 5633 case DRM_FORMAT_YVU420: 5634 case DRM_FORMAT_YUV422: 5635 case DRM_FORMAT_YVU422: 5636 case DRM_FORMAT_YUV444: 5637 case DRM_FORMAT_YVU444: 5638 return 1; 5639 default: 5640 drm_fb_get_bpp_depth(format, &depth, &bpp); 5641 return bpp >> 3; 5642 } 5643 } 5644 EXPORT_SYMBOL(drm_format_plane_cpp); 5645 5646 /** 5647 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 5648 * @format: pixel format (DRM_FORMAT_*) 5649 * 5650 * Returns: 5651 * The horizontal chroma subsampling factor for the 5652 * specified pixel format. 5653 */ 5654 int drm_format_horz_chroma_subsampling(uint32_t format) 5655 { 5656 switch (format) { 5657 case DRM_FORMAT_YUV411: 5658 case DRM_FORMAT_YVU411: 5659 case DRM_FORMAT_YUV410: 5660 case DRM_FORMAT_YVU410: 5661 return 4; 5662 case DRM_FORMAT_YUYV: 5663 case DRM_FORMAT_YVYU: 5664 case DRM_FORMAT_UYVY: 5665 case DRM_FORMAT_VYUY: 5666 case DRM_FORMAT_NV12: 5667 case DRM_FORMAT_NV21: 5668 case DRM_FORMAT_NV16: 5669 case DRM_FORMAT_NV61: 5670 case DRM_FORMAT_YUV422: 5671 case DRM_FORMAT_YVU422: 5672 case DRM_FORMAT_YUV420: 5673 case DRM_FORMAT_YVU420: 5674 return 2; 5675 default: 5676 return 1; 5677 } 5678 } 5679 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5680 5681 /** 5682 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5683 * @format: pixel format (DRM_FORMAT_*) 5684 * 5685 * Returns: 5686 * The vertical chroma subsampling factor for the 5687 * specified pixel format. 5688 */ 5689 int drm_format_vert_chroma_subsampling(uint32_t format) 5690 { 5691 switch (format) { 5692 case DRM_FORMAT_YUV410: 5693 case DRM_FORMAT_YVU410: 5694 return 4; 5695 case DRM_FORMAT_YUV420: 5696 case DRM_FORMAT_YVU420: 5697 case DRM_FORMAT_NV12: 5698 case DRM_FORMAT_NV21: 5699 return 2; 5700 default: 5701 return 1; 5702 } 5703 } 5704 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5705 5706 /** 5707 * drm_rotation_simplify() - Try to simplify the rotation 5708 * @rotation: Rotation to be simplified 5709 * @supported_rotations: Supported rotations 5710 * 5711 * Attempt to simplify the rotation to a form that is supported. 5712 * Eg. if the hardware supports everything except DRM_REFLECT_X 5713 * one could call this function like this: 5714 * 5715 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5716 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5717 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5718 * 5719 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5720 * transforms the hardware supports, this function may not 5721 * be able to produce a supported transform, so the caller should 5722 * check the result afterwards. 5723 */ 5724 unsigned int drm_rotation_simplify(unsigned int rotation, 5725 unsigned int supported_rotations) 5726 { 5727 if (rotation & ~supported_rotations) { 5728 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5729 rotation = (rotation & DRM_REFLECT_MASK) | 5730 BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4); 5731 } 5732 5733 return rotation; 5734 } 5735 EXPORT_SYMBOL(drm_rotation_simplify); 5736 5737 /** 5738 * drm_mode_config_init - initialize DRM mode_configuration structure 5739 * @dev: DRM device 5740 * 5741 * Initialize @dev's mode_config structure, used for tracking the graphics 5742 * configuration of @dev. 5743 * 5744 * Since this initializes the modeset locks, no locking is possible. Which is no 5745 * problem, since this should happen single threaded at init time. It is the 5746 * driver's problem to ensure this guarantee. 5747 * 5748 */ 5749 void drm_mode_config_init(struct drm_device *dev) 5750 { 5751 lockinit(&dev->mode_config.mutex, "drmmcm", 0, LK_CANRECURSE); 5752 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5753 lockinit(&dev->mode_config.idr_mutex, "mcfgidr", 0, LK_CANRECURSE); 5754 lockinit(&dev->mode_config.fb_lock, "drmfbl", 0, LK_CANRECURSE); 5755 lockinit(&dev->mode_config.blob_lock, "drmcbl", 0, LK_CANRECURSE); 5756 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5757 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5758 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5759 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5760 INIT_LIST_HEAD(&dev->mode_config.property_list); 5761 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5762 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5763 idr_init(&dev->mode_config.crtc_idr); 5764 idr_init(&dev->mode_config.tile_idr); 5765 5766 drm_modeset_lock_all(dev); 5767 drm_mode_create_standard_properties(dev); 5768 drm_modeset_unlock_all(dev); 5769 5770 /* Just to be sure */ 5771 dev->mode_config.num_fb = 0; 5772 dev->mode_config.num_connector = 0; 5773 dev->mode_config.num_crtc = 0; 5774 dev->mode_config.num_encoder = 0; 5775 dev->mode_config.num_overlay_plane = 0; 5776 dev->mode_config.num_total_plane = 0; 5777 } 5778 EXPORT_SYMBOL(drm_mode_config_init); 5779 5780 /** 5781 * drm_mode_config_cleanup - free up DRM mode_config info 5782 * @dev: DRM device 5783 * 5784 * Free up all the connectors and CRTCs associated with this DRM device, then 5785 * free up the framebuffers and associated buffer objects. 5786 * 5787 * Note that since this /should/ happen single-threaded at driver/device 5788 * teardown time, no locking is required. It's the driver's job to ensure that 5789 * this guarantee actually holds true. 5790 * 5791 * FIXME: cleanup any dangling user buffer objects too 5792 */ 5793 void drm_mode_config_cleanup(struct drm_device *dev) 5794 { 5795 struct drm_connector *connector, *ot; 5796 struct drm_crtc *crtc, *ct; 5797 struct drm_encoder *encoder, *enct; 5798 struct drm_framebuffer *fb, *fbt; 5799 struct drm_property *property, *pt; 5800 struct drm_property_blob *blob, *bt; 5801 struct drm_plane *plane, *plt; 5802 5803 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5804 head) { 5805 encoder->funcs->destroy(encoder); 5806 } 5807 5808 list_for_each_entry_safe(connector, ot, 5809 &dev->mode_config.connector_list, head) { 5810 connector->funcs->destroy(connector); 5811 } 5812 5813 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5814 head) { 5815 drm_property_destroy(dev, property); 5816 } 5817 5818 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5819 head_global) { 5820 drm_property_unreference_blob(blob); 5821 } 5822 5823 /* 5824 * Single-threaded teardown context, so it's not required to grab the 5825 * fb_lock to protect against concurrent fb_list access. Contrary, it 5826 * would actually deadlock with the drm_framebuffer_cleanup function. 5827 * 5828 * Also, if there are any framebuffers left, that's a driver leak now, 5829 * so politely WARN about this. 5830 */ 5831 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5832 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5833 drm_framebuffer_free(&fb->refcount); 5834 } 5835 5836 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5837 head) { 5838 plane->funcs->destroy(plane); 5839 } 5840 5841 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5842 crtc->funcs->destroy(crtc); 5843 } 5844 5845 idr_destroy(&dev->mode_config.tile_idr); 5846 idr_destroy(&dev->mode_config.crtc_idr); 5847 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5848 } 5849 EXPORT_SYMBOL(drm_mode_config_cleanup); 5850 5851 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5852 unsigned int supported_rotations) 5853 { 5854 static const struct drm_prop_enum_list props[] = { 5855 { DRM_ROTATE_0, "rotate-0" }, 5856 { DRM_ROTATE_90, "rotate-90" }, 5857 { DRM_ROTATE_180, "rotate-180" }, 5858 { DRM_ROTATE_270, "rotate-270" }, 5859 { DRM_REFLECT_X, "reflect-x" }, 5860 { DRM_REFLECT_Y, "reflect-y" }, 5861 }; 5862 5863 return drm_property_create_bitmask(dev, 0, "rotation", 5864 props, ARRAY_SIZE(props), 5865 supported_rotations); 5866 } 5867 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5868 5869 /** 5870 * DOC: Tile group 5871 * 5872 * Tile groups are used to represent tiled monitors with a unique 5873 * integer identifier. Tiled monitors using DisplayID v1.3 have 5874 * a unique 8-byte handle, we store this in a tile group, so we 5875 * have a common identifier for all tiles in a monitor group. 5876 */ 5877 static void drm_tile_group_free(struct kref *kref) 5878 { 5879 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5880 struct drm_device *dev = tg->dev; 5881 mutex_lock(&dev->mode_config.idr_mutex); 5882 idr_remove(&dev->mode_config.tile_idr, tg->id); 5883 mutex_unlock(&dev->mode_config.idr_mutex); 5884 kfree(tg); 5885 } 5886 5887 /** 5888 * drm_mode_put_tile_group - drop a reference to a tile group. 5889 * @dev: DRM device 5890 * @tg: tile group to drop reference to. 5891 * 5892 * drop reference to tile group and free if 0. 5893 */ 5894 void drm_mode_put_tile_group(struct drm_device *dev, 5895 struct drm_tile_group *tg) 5896 { 5897 kref_put(&tg->refcount, drm_tile_group_free); 5898 } 5899 5900 /** 5901 * drm_mode_get_tile_group - get a reference to an existing tile group 5902 * @dev: DRM device 5903 * @topology: 8-bytes unique per monitor. 5904 * 5905 * Use the unique bytes to get a reference to an existing tile group. 5906 * 5907 * RETURNS: 5908 * tile group or NULL if not found. 5909 */ 5910 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 5911 char topology[8]) 5912 { 5913 #if 0 5914 struct drm_tile_group *tg; 5915 int id; 5916 mutex_lock(&dev->mode_config.idr_mutex); 5917 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 5918 if (!memcmp(tg->group_data, topology, 8)) { 5919 if (!kref_get_unless_zero(&tg->refcount)) 5920 tg = NULL; 5921 mutex_unlock(&dev->mode_config.idr_mutex); 5922 return tg; 5923 } 5924 } 5925 mutex_unlock(&dev->mode_config.idr_mutex); 5926 #endif 5927 return NULL; 5928 } 5929 EXPORT_SYMBOL(drm_mode_get_tile_group); 5930 5931 /** 5932 * drm_mode_create_tile_group - create a tile group from a displayid description 5933 * @dev: DRM device 5934 * @topology: 8-bytes unique per monitor. 5935 * 5936 * Create a tile group for the unique monitor, and get a unique 5937 * identifier for the tile group. 5938 * 5939 * RETURNS: 5940 * new tile group or error. 5941 */ 5942 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 5943 char topology[8]) 5944 { 5945 struct drm_tile_group *tg; 5946 int ret; 5947 5948 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 5949 if (!tg) 5950 return ERR_PTR(-ENOMEM); 5951 5952 kref_init(&tg->refcount); 5953 memcpy(tg->group_data, topology, 8); 5954 tg->dev = dev; 5955 5956 mutex_lock(&dev->mode_config.idr_mutex); 5957 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 5958 if (ret >= 0) { 5959 tg->id = ret; 5960 } else { 5961 kfree(tg); 5962 tg = ERR_PTR(ret); 5963 } 5964 5965 mutex_unlock(&dev->mode_config.idr_mutex); 5966 return tg; 5967 } 5968 EXPORT_SYMBOL(drm_mode_create_tile_group); 5969