1 /* 2 * Copyright (c) 2006-2008 Intel Corporation 3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 4 * Copyright (c) 2008 Red Hat Inc. 5 * 6 * DRM core CRTC related functions 7 * 8 * Permission to use, copy, modify, distribute, and sell this software and its 9 * documentation for any purpose is hereby granted without fee, provided that 10 * the above copyright notice appear in all copies and that both that copyright 11 * notice and this permission notice appear in supporting documentation, and 12 * that the name of the copyright holders not be used in advertising or 13 * publicity pertaining to distribution of the software without specific, 14 * written prior permission. The copyright holders make no representations 15 * about the suitability of this software for any purpose. It is provided "as 16 * is" without express or implied warranty. 17 * 18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 24 * OF THIS SOFTWARE. 25 * 26 * Authors: 27 * Keith Packard 28 * Eric Anholt <eric@anholt.net> 29 * Dave Airlie <airlied@linux.ie> 30 * Jesse Barnes <jesse.barnes@intel.com> 31 */ 32 #include <linux/ctype.h> 33 #include <linux/list.h> 34 #include <linux/slab.h> 35 #include <linux/export.h> 36 #include <drm/drmP.h> 37 #include <drm/drm_crtc.h> 38 #include <drm/drm_edid.h> 39 #include <drm/drm_fourcc.h> 40 #include <drm/drm_modeset_lock.h> 41 #include <drm/drm_atomic.h> 42 43 #include "drm_crtc_internal.h" 44 #include "drm_internal.h" 45 46 static struct drm_framebuffer * 47 internal_framebuffer_create(struct drm_device *dev, 48 struct drm_mode_fb_cmd2 *r, 49 struct drm_file *file_priv); 50 51 /* Avoid boilerplate. I'm tired of typing. */ 52 #define DRM_ENUM_NAME_FN(fnname, list) \ 53 const char *fnname(int val) \ 54 { \ 55 int i; \ 56 for (i = 0; i < ARRAY_SIZE(list); i++) { \ 57 if (list[i].type == val) \ 58 return list[i].name; \ 59 } \ 60 return "(unknown)"; \ 61 } 62 63 /* 64 * Global properties 65 */ 66 static const struct drm_prop_enum_list drm_dpms_enum_list[] = { 67 { DRM_MODE_DPMS_ON, "On" }, 68 { DRM_MODE_DPMS_STANDBY, "Standby" }, 69 { DRM_MODE_DPMS_SUSPEND, "Suspend" }, 70 { DRM_MODE_DPMS_OFF, "Off" } 71 }; 72 73 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) 74 75 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { 76 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 77 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 78 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 79 }; 80 81 /* 82 * Optional properties 83 */ 84 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { 85 { DRM_MODE_SCALE_NONE, "None" }, 86 { DRM_MODE_SCALE_FULLSCREEN, "Full" }, 87 { DRM_MODE_SCALE_CENTER, "Center" }, 88 { DRM_MODE_SCALE_ASPECT, "Full aspect" }, 89 }; 90 91 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { 92 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, 93 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, 94 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, 95 }; 96 97 /* 98 * Non-global properties, but "required" for certain connectors. 99 */ 100 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { 101 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 102 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 103 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 104 }; 105 106 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) 107 108 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { 109 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 110 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 111 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 112 }; 113 114 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, 115 drm_dvi_i_subconnector_enum_list) 116 117 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { 118 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 119 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 120 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 121 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 122 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 123 }; 124 125 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) 126 127 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { 128 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 129 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 130 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 131 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 132 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 133 }; 134 135 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, 136 drm_tv_subconnector_enum_list) 137 138 static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = { 139 { DRM_MODE_DIRTY_OFF, "Off" }, 140 { DRM_MODE_DIRTY_ON, "On" }, 141 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" }, 142 }; 143 144 struct drm_conn_prop_enum_list { 145 int type; 146 const char *name; 147 struct ida ida; 148 }; 149 150 /* 151 * Connector and encoder types. 152 */ 153 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { 154 { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, 155 { DRM_MODE_CONNECTOR_VGA, "VGA" }, 156 { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, 157 { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, 158 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, 159 { DRM_MODE_CONNECTOR_Composite, "Composite" }, 160 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, 161 { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, 162 { DRM_MODE_CONNECTOR_Component, "Component" }, 163 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, 164 { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, 165 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, 166 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, 167 { DRM_MODE_CONNECTOR_TV, "TV" }, 168 { DRM_MODE_CONNECTOR_eDP, "eDP" }, 169 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, 170 { DRM_MODE_CONNECTOR_DSI, "DSI" }, 171 }; 172 173 static const struct drm_prop_enum_list drm_encoder_enum_list[] = { 174 { DRM_MODE_ENCODER_NONE, "None" }, 175 { DRM_MODE_ENCODER_DAC, "DAC" }, 176 { DRM_MODE_ENCODER_TMDS, "TMDS" }, 177 { DRM_MODE_ENCODER_LVDS, "LVDS" }, 178 { DRM_MODE_ENCODER_TVDAC, "TV" }, 179 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" }, 180 { DRM_MODE_ENCODER_DSI, "DSI" }, 181 { DRM_MODE_ENCODER_DPMST, "DP MST" }, 182 }; 183 184 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { 185 { SubPixelUnknown, "Unknown" }, 186 { SubPixelHorizontalRGB, "Horizontal RGB" }, 187 { SubPixelHorizontalBGR, "Horizontal BGR" }, 188 { SubPixelVerticalRGB, "Vertical RGB" }, 189 { SubPixelVerticalBGR, "Vertical BGR" }, 190 { SubPixelNone, "None" }, 191 }; 192 193 void drm_connector_ida_init(void) 194 { 195 int i; 196 197 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 198 ida_init(&drm_connector_enum_list[i].ida); 199 } 200 201 void drm_connector_ida_destroy(void) 202 { 203 int i; 204 205 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 206 ida_destroy(&drm_connector_enum_list[i].ida); 207 } 208 209 /** 210 * drm_get_connector_status_name - return a string for connector status 211 * @status: connector status to compute name of 212 * 213 * In contrast to the other drm_get_*_name functions this one here returns a 214 * const pointer and hence is threadsafe. 215 */ 216 const char *drm_get_connector_status_name(enum drm_connector_status status) 217 { 218 if (status == connector_status_connected) 219 return "connected"; 220 else if (status == connector_status_disconnected) 221 return "disconnected"; 222 else 223 return "unknown"; 224 } 225 EXPORT_SYMBOL(drm_get_connector_status_name); 226 227 /** 228 * drm_get_subpixel_order_name - return a string for a given subpixel enum 229 * @order: enum of subpixel_order 230 * 231 * Note you could abuse this and return something out of bounds, but that 232 * would be a caller error. No unscrubbed user data should make it here. 233 */ 234 const char *drm_get_subpixel_order_name(enum subpixel_order order) 235 { 236 return drm_subpixel_enum_list[order].name; 237 } 238 EXPORT_SYMBOL(drm_get_subpixel_order_name); 239 240 static char printable_char(int c) 241 { 242 return isascii(c) && isprint(c) ? c : '?'; 243 } 244 245 /** 246 * drm_get_format_name - return a string for drm fourcc format 247 * @format: format to compute name of 248 * 249 * Note that the buffer used by this function is globally shared and owned by 250 * the function itself. 251 * 252 * FIXME: This isn't really multithreading safe. 253 */ 254 const char *drm_get_format_name(uint32_t format) 255 { 256 static char buf[32]; 257 258 snprintf(buf, sizeof(buf), 259 "%c%c%c%c %s-endian (0x%08x)", 260 printable_char(format & 0xff), 261 printable_char((format >> 8) & 0xff), 262 printable_char((format >> 16) & 0xff), 263 printable_char((format >> 24) & 0x7f), 264 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", 265 format); 266 267 return buf; 268 } 269 EXPORT_SYMBOL(drm_get_format_name); 270 271 /* 272 * Internal function to assign a slot in the object idr and optionally 273 * register the object into the idr. 274 */ 275 static int drm_mode_object_get_reg(struct drm_device *dev, 276 struct drm_mode_object *obj, 277 uint32_t obj_type, 278 bool register_obj) 279 { 280 int ret; 281 282 mutex_lock(&dev->mode_config.idr_mutex); 283 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); 284 if (ret >= 0) { 285 /* 286 * Set up the object linking under the protection of the idr 287 * lock so that other users can't see inconsistent state. 288 */ 289 obj->id = ret; 290 obj->type = obj_type; 291 } 292 mutex_unlock(&dev->mode_config.idr_mutex); 293 294 return ret < 0 ? ret : 0; 295 } 296 297 /** 298 * drm_mode_object_get - allocate a new modeset identifier 299 * @dev: DRM device 300 * @obj: object pointer, used to generate unique ID 301 * @obj_type: object type 302 * 303 * Create a unique identifier based on @ptr in @dev's identifier space. Used 304 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix 305 * modeset identifiers are _not_ reference counted. Hence don't use this for 306 * reference counted modeset objects like framebuffers. 307 * 308 * Returns: 309 * Zero on success, error code on failure. 310 */ 311 int drm_mode_object_get(struct drm_device *dev, 312 struct drm_mode_object *obj, uint32_t obj_type) 313 { 314 return drm_mode_object_get_reg(dev, obj, obj_type, true); 315 } 316 317 static void drm_mode_object_register(struct drm_device *dev, 318 struct drm_mode_object *obj) 319 { 320 mutex_lock(&dev->mode_config.idr_mutex); 321 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); 322 mutex_unlock(&dev->mode_config.idr_mutex); 323 } 324 325 /** 326 * drm_mode_object_put - free a modeset identifer 327 * @dev: DRM device 328 * @object: object to free 329 * 330 * Free @id from @dev's unique identifier pool. Note that despite the _get 331 * postfix modeset identifiers are _not_ reference counted. Hence don't use this 332 * for reference counted modeset objects like framebuffers. 333 */ 334 void drm_mode_object_put(struct drm_device *dev, 335 struct drm_mode_object *object) 336 { 337 mutex_lock(&dev->mode_config.idr_mutex); 338 idr_remove(&dev->mode_config.crtc_idr, object->id); 339 mutex_unlock(&dev->mode_config.idr_mutex); 340 } 341 342 static struct drm_mode_object *_object_find(struct drm_device *dev, 343 uint32_t id, uint32_t type) 344 { 345 struct drm_mode_object *obj = NULL; 346 347 mutex_lock(&dev->mode_config.idr_mutex); 348 obj = idr_find(&dev->mode_config.crtc_idr, id); 349 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) 350 obj = NULL; 351 if (obj && obj->id != id) 352 obj = NULL; 353 /* don't leak out unref'd fb's */ 354 if (obj && 355 (obj->type == DRM_MODE_OBJECT_FB || 356 obj->type == DRM_MODE_OBJECT_BLOB)) 357 obj = NULL; 358 mutex_unlock(&dev->mode_config.idr_mutex); 359 360 return obj; 361 } 362 363 /** 364 * drm_mode_object_find - look up a drm object with static lifetime 365 * @dev: drm device 366 * @id: id of the mode object 367 * @type: type of the mode object 368 * 369 * Note that framebuffers cannot be looked up with this functions - since those 370 * are reference counted, they need special treatment. Even with 371 * DRM_MODE_OBJECT_ANY (although that will simply return NULL 372 * rather than WARN_ON()). 373 */ 374 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, 375 uint32_t id, uint32_t type) 376 { 377 struct drm_mode_object *obj = NULL; 378 379 /* Framebuffers are reference counted and need their own lookup 380 * function.*/ 381 WARN_ON(type == DRM_MODE_OBJECT_FB || type == DRM_MODE_OBJECT_BLOB); 382 obj = _object_find(dev, id, type); 383 return obj; 384 } 385 EXPORT_SYMBOL(drm_mode_object_find); 386 387 /** 388 * drm_framebuffer_init - initialize a framebuffer 389 * @dev: DRM device 390 * @fb: framebuffer to be initialized 391 * @funcs: ... with these functions 392 * 393 * Allocates an ID for the framebuffer's parent mode object, sets its mode 394 * functions & device file and adds it to the master fd list. 395 * 396 * IMPORTANT: 397 * This functions publishes the fb and makes it available for concurrent access 398 * by other users. Which means by this point the fb _must_ be fully set up - 399 * since all the fb attributes are invariant over its lifetime, no further 400 * locking but only correct reference counting is required. 401 * 402 * Returns: 403 * Zero on success, error code on failure. 404 */ 405 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, 406 const struct drm_framebuffer_funcs *funcs) 407 { 408 int ret; 409 410 mutex_lock(&dev->mode_config.fb_lock); 411 kref_init(&fb->refcount); 412 INIT_LIST_HEAD(&fb->filp_head); 413 fb->dev = dev; 414 fb->funcs = funcs; 415 416 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB); 417 if (ret) 418 goto out; 419 420 dev->mode_config.num_fb++; 421 list_add(&fb->head, &dev->mode_config.fb_list); 422 out: 423 mutex_unlock(&dev->mode_config.fb_lock); 424 425 return ret; 426 } 427 EXPORT_SYMBOL(drm_framebuffer_init); 428 429 /* dev->mode_config.fb_lock must be held! */ 430 static void __drm_framebuffer_unregister(struct drm_device *dev, 431 struct drm_framebuffer *fb) 432 { 433 mutex_lock(&dev->mode_config.idr_mutex); 434 idr_remove(&dev->mode_config.crtc_idr, fb->base.id); 435 mutex_unlock(&dev->mode_config.idr_mutex); 436 437 fb->base.id = 0; 438 } 439 440 static void drm_framebuffer_free(struct kref *kref) 441 { 442 struct drm_framebuffer *fb = 443 container_of(kref, struct drm_framebuffer, refcount); 444 struct drm_device *dev = fb->dev; 445 446 /* 447 * The lookup idr holds a weak reference, which has not necessarily been 448 * removed at this point. Check for that. 449 */ 450 mutex_lock(&dev->mode_config.fb_lock); 451 if (fb->base.id) { 452 /* Mark fb as reaped and drop idr ref. */ 453 __drm_framebuffer_unregister(dev, fb); 454 } 455 mutex_unlock(&dev->mode_config.fb_lock); 456 457 fb->funcs->destroy(fb); 458 } 459 460 static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev, 461 uint32_t id) 462 { 463 struct drm_mode_object *obj = NULL; 464 struct drm_framebuffer *fb; 465 466 mutex_lock(&dev->mode_config.idr_mutex); 467 obj = idr_find(&dev->mode_config.crtc_idr, id); 468 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id)) 469 fb = NULL; 470 else 471 fb = obj_to_fb(obj); 472 mutex_unlock(&dev->mode_config.idr_mutex); 473 474 return fb; 475 } 476 477 /** 478 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference 479 * @dev: drm device 480 * @id: id of the fb object 481 * 482 * If successful, this grabs an additional reference to the framebuffer - 483 * callers need to make sure to eventually unreference the returned framebuffer 484 * again, using @drm_framebuffer_unreference. 485 */ 486 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, 487 uint32_t id) 488 { 489 struct drm_framebuffer *fb; 490 491 mutex_lock(&dev->mode_config.fb_lock); 492 fb = __drm_framebuffer_lookup(dev, id); 493 if (fb) { 494 if (!kref_get_unless_zero(&fb->refcount)) 495 fb = NULL; 496 } 497 mutex_unlock(&dev->mode_config.fb_lock); 498 499 return fb; 500 } 501 EXPORT_SYMBOL(drm_framebuffer_lookup); 502 503 /** 504 * drm_framebuffer_unreference - unref a framebuffer 505 * @fb: framebuffer to unref 506 * 507 * This functions decrements the fb's refcount and frees it if it drops to zero. 508 */ 509 void drm_framebuffer_unreference(struct drm_framebuffer *fb) 510 { 511 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 512 kref_put(&fb->refcount, drm_framebuffer_free); 513 } 514 EXPORT_SYMBOL(drm_framebuffer_unreference); 515 516 /** 517 * drm_framebuffer_reference - incr the fb refcnt 518 * @fb: framebuffer 519 * 520 * This functions increments the fb's refcount. 521 */ 522 void drm_framebuffer_reference(struct drm_framebuffer *fb) 523 { 524 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 525 kref_get(&fb->refcount); 526 } 527 EXPORT_SYMBOL(drm_framebuffer_reference); 528 529 /** 530 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr 531 * @fb: fb to unregister 532 * 533 * Drivers need to call this when cleaning up driver-private framebuffers, e.g. 534 * those used for fbdev. Note that the caller must hold a reference of it's own, 535 * i.e. the object may not be destroyed through this call (since it'll lead to a 536 * locking inversion). 537 */ 538 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) 539 { 540 struct drm_device *dev; 541 542 if (!fb) 543 return; 544 545 dev = fb->dev; 546 547 mutex_lock(&dev->mode_config.fb_lock); 548 /* Mark fb as reaped and drop idr ref. */ 549 __drm_framebuffer_unregister(dev, fb); 550 mutex_unlock(&dev->mode_config.fb_lock); 551 } 552 EXPORT_SYMBOL(drm_framebuffer_unregister_private); 553 554 /** 555 * drm_framebuffer_cleanup - remove a framebuffer object 556 * @fb: framebuffer to remove 557 * 558 * Cleanup framebuffer. This function is intended to be used from the drivers 559 * ->destroy callback. It can also be used to clean up driver private 560 * framebuffers embedded into a larger structure. 561 * 562 * Note that this function does not remove the fb from active usuage - if it is 563 * still used anywhere, hilarity can ensue since userspace could call getfb on 564 * the id and get back -EINVAL. Obviously no concern at driver unload time. 565 * 566 * Also, the framebuffer will not be removed from the lookup idr - for 567 * user-created framebuffers this will happen in in the rmfb ioctl. For 568 * driver-private objects (e.g. for fbdev) drivers need to explicitly call 569 * drm_framebuffer_unregister_private. 570 */ 571 void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 572 { 573 struct drm_device *dev = fb->dev; 574 575 mutex_lock(&dev->mode_config.fb_lock); 576 list_del(&fb->head); 577 dev->mode_config.num_fb--; 578 mutex_unlock(&dev->mode_config.fb_lock); 579 } 580 EXPORT_SYMBOL(drm_framebuffer_cleanup); 581 582 /** 583 * drm_framebuffer_remove - remove and unreference a framebuffer object 584 * @fb: framebuffer to remove 585 * 586 * Scans all the CRTCs and planes in @dev's mode_config. If they're 587 * using @fb, removes it, setting it to NULL. Then drops the reference to the 588 * passed-in framebuffer. Might take the modeset locks. 589 * 590 * Note that this function optimizes the cleanup away if the caller holds the 591 * last reference to the framebuffer. It is also guaranteed to not take the 592 * modeset locks in this case. 593 */ 594 void drm_framebuffer_remove(struct drm_framebuffer *fb) 595 { 596 struct drm_device *dev; 597 struct drm_crtc *crtc; 598 struct drm_plane *plane; 599 struct drm_mode_set set; 600 int ret; 601 602 if (!fb) 603 return; 604 605 dev = fb->dev; 606 607 WARN_ON(!list_empty(&fb->filp_head)); 608 609 /* 610 * drm ABI mandates that we remove any deleted framebuffers from active 611 * useage. But since most sane clients only remove framebuffers they no 612 * longer need, try to optimize this away. 613 * 614 * Since we're holding a reference ourselves, observing a refcount of 1 615 * means that we're the last holder and can skip it. Also, the refcount 616 * can never increase from 1 again, so we don't need any barriers or 617 * locks. 618 * 619 * Note that userspace could try to race with use and instate a new 620 * usage _after_ we've cleared all current ones. End result will be an 621 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot 622 * in this manner. 623 */ 624 if (atomic_read(&fb->refcount.refcount) > 1) { 625 drm_modeset_lock_all(dev); 626 /* remove from any CRTC */ 627 drm_for_each_crtc(crtc, dev) { 628 if (crtc->primary->fb == fb) { 629 /* should turn off the crtc */ 630 memset(&set, 0, sizeof(struct drm_mode_set)); 631 set.crtc = crtc; 632 set.fb = NULL; 633 ret = drm_mode_set_config_internal(&set); 634 if (ret) 635 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); 636 } 637 } 638 639 drm_for_each_plane(plane, dev) { 640 if (plane->fb == fb) 641 drm_plane_force_disable(plane); 642 } 643 drm_modeset_unlock_all(dev); 644 } 645 646 drm_framebuffer_unreference(fb); 647 } 648 EXPORT_SYMBOL(drm_framebuffer_remove); 649 650 DEFINE_WW_CLASS(crtc_ww_class); 651 652 /** 653 * drm_crtc_init_with_planes - Initialise a new CRTC object with 654 * specified primary and cursor planes. 655 * @dev: DRM device 656 * @crtc: CRTC object to init 657 * @primary: Primary plane for CRTC 658 * @cursor: Cursor plane for CRTC 659 * @funcs: callbacks for the new CRTC 660 * 661 * Inits a new object created as base part of a driver crtc object. 662 * 663 * Returns: 664 * Zero on success, error code on failure. 665 */ 666 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 667 struct drm_plane *primary, 668 struct drm_plane *cursor, 669 const struct drm_crtc_funcs *funcs) 670 { 671 struct drm_mode_config *config = &dev->mode_config; 672 int ret; 673 674 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); 675 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); 676 677 crtc->dev = dev; 678 crtc->funcs = funcs; 679 680 drm_modeset_lock_init(&crtc->mutex); 681 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 682 if (ret) 683 return ret; 684 685 crtc->base.properties = &crtc->properties; 686 687 list_add_tail(&crtc->head, &config->crtc_list); 688 config->num_crtc++; 689 690 crtc->primary = primary; 691 crtc->cursor = cursor; 692 if (primary) 693 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 694 if (cursor) 695 cursor->possible_crtcs = 1 << drm_crtc_index(crtc); 696 697 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 698 drm_object_attach_property(&crtc->base, config->prop_active, 0); 699 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); 700 } 701 702 return 0; 703 } 704 EXPORT_SYMBOL(drm_crtc_init_with_planes); 705 706 /** 707 * drm_crtc_cleanup - Clean up the core crtc usage 708 * @crtc: CRTC to cleanup 709 * 710 * This function cleans up @crtc and removes it from the DRM mode setting 711 * core. Note that the function does *not* free the crtc structure itself, 712 * this is the responsibility of the caller. 713 */ 714 void drm_crtc_cleanup(struct drm_crtc *crtc) 715 { 716 struct drm_device *dev = crtc->dev; 717 718 kfree(crtc->gamma_store); 719 crtc->gamma_store = NULL; 720 721 drm_modeset_lock_fini(&crtc->mutex); 722 723 drm_mode_object_put(dev, &crtc->base); 724 list_del(&crtc->head); 725 dev->mode_config.num_crtc--; 726 727 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); 728 if (crtc->state && crtc->funcs->atomic_destroy_state) 729 crtc->funcs->atomic_destroy_state(crtc, crtc->state); 730 731 memset(crtc, 0, sizeof(*crtc)); 732 } 733 EXPORT_SYMBOL(drm_crtc_cleanup); 734 735 /** 736 * drm_crtc_index - find the index of a registered CRTC 737 * @crtc: CRTC to find index for 738 * 739 * Given a registered CRTC, return the index of that CRTC within a DRM 740 * device's list of CRTCs. 741 */ 742 unsigned int drm_crtc_index(struct drm_crtc *crtc) 743 { 744 unsigned int index = 0; 745 struct drm_crtc *tmp; 746 747 drm_for_each_crtc(tmp, crtc->dev) { 748 if (tmp == crtc) 749 return index; 750 751 index++; 752 } 753 754 BUG(); 755 } 756 EXPORT_SYMBOL(drm_crtc_index); 757 758 /* 759 * drm_mode_remove - remove and free a mode 760 * @connector: connector list to modify 761 * @mode: mode to remove 762 * 763 * Remove @mode from @connector's mode list, then free it. 764 */ 765 static void drm_mode_remove(struct drm_connector *connector, 766 struct drm_display_mode *mode) 767 { 768 list_del(&mode->head); 769 drm_mode_destroy(connector->dev, mode); 770 } 771 772 /** 773 * drm_display_info_set_bus_formats - set the supported bus formats 774 * @info: display info to store bus formats in 775 * @formats: array containing the supported bus formats 776 * @num_formats: the number of entries in the fmts array 777 * 778 * Store the supported bus formats in display info structure. 779 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for 780 * a full list of available formats. 781 */ 782 int drm_display_info_set_bus_formats(struct drm_display_info *info, 783 const u32 *formats, 784 unsigned int num_formats) 785 { 786 u32 *fmts = NULL; 787 788 if (!formats && num_formats) 789 return -EINVAL; 790 791 if (formats && num_formats) { 792 fmts = kmemdup(formats, sizeof(*formats) * num_formats, 793 GFP_KERNEL); 794 if (!fmts) 795 return -ENOMEM; 796 } 797 798 kfree(info->bus_formats); 799 info->bus_formats = fmts; 800 info->num_bus_formats = num_formats; 801 802 return 0; 803 } 804 EXPORT_SYMBOL(drm_display_info_set_bus_formats); 805 806 /** 807 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 808 * @connector: connector to quwery 809 * 810 * The kernel supports per-connector configration of its consoles through 811 * use of the video= parameter. This function parses that option and 812 * extracts the user's specified mode (or enable/disable status) for a 813 * particular connector. This is typically only used during the early fbdev 814 * setup. 815 */ 816 static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 817 { 818 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 819 char *option = NULL; 820 821 if (fb_get_options(connector->name, &option)) 822 return; 823 824 if (!drm_mode_parse_command_line_for_connector(option, 825 connector, 826 mode)) 827 return; 828 829 if (mode->force) { 830 const char *s; 831 832 switch (mode->force) { 833 case DRM_FORCE_OFF: 834 s = "OFF"; 835 break; 836 case DRM_FORCE_ON_DIGITAL: 837 s = "ON - dig"; 838 break; 839 default: 840 case DRM_FORCE_ON: 841 s = "ON"; 842 break; 843 } 844 845 DRM_INFO("forcing %s connector %s\n", connector->name, s); 846 connector->force = mode->force; 847 } 848 849 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 850 connector->name, 851 mode->xres, mode->yres, 852 mode->refresh_specified ? mode->refresh : 60, 853 mode->rb ? " reduced blanking" : "", 854 mode->margins ? " with margins" : "", 855 mode->interlace ? " interlaced" : ""); 856 } 857 858 /** 859 * drm_connector_init - Init a preallocated connector 860 * @dev: DRM device 861 * @connector: the connector to init 862 * @funcs: callbacks for this connector 863 * @connector_type: user visible type of the connector 864 * 865 * Initialises a preallocated connector. Connectors should be 866 * subclassed as part of driver connector objects. 867 * 868 * Returns: 869 * Zero on success, error code on failure. 870 */ 871 int drm_connector_init(struct drm_device *dev, 872 struct drm_connector *connector, 873 const struct drm_connector_funcs *funcs, 874 int connector_type) 875 { 876 struct drm_mode_config *config = &dev->mode_config; 877 int ret; 878 struct ida *connector_ida = 879 &drm_connector_enum_list[connector_type].ida; 880 881 drm_modeset_lock_all(dev); 882 883 ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false); 884 if (ret) 885 goto out_unlock; 886 887 connector->base.properties = &connector->properties; 888 connector->dev = dev; 889 connector->funcs = funcs; 890 connector->connector_type = connector_type; 891 connector->connector_type_id = 892 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); 893 if (connector->connector_type_id < 0) { 894 ret = connector->connector_type_id; 895 goto out_put; 896 } 897 connector->name = 898 kasprintf(GFP_KERNEL, "%s-%d", 899 drm_connector_enum_list[connector_type].name, 900 connector->connector_type_id); 901 if (!connector->name) { 902 ret = -ENOMEM; 903 goto out_put; 904 } 905 906 INIT_LIST_HEAD(&connector->probed_modes); 907 INIT_LIST_HEAD(&connector->modes); 908 connector->edid_blob_ptr = NULL; 909 connector->status = connector_status_unknown; 910 911 drm_connector_get_cmdline_mode(connector); 912 913 /* We should add connectors at the end to avoid upsetting the connector 914 * index too much. */ 915 list_add_tail(&connector->head, &config->connector_list); 916 config->num_connector++; 917 918 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 919 drm_object_attach_property(&connector->base, 920 config->edid_property, 921 0); 922 923 drm_object_attach_property(&connector->base, 924 config->dpms_property, 0); 925 926 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 927 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); 928 } 929 930 connector->debugfs_entry = NULL; 931 932 out_put: 933 if (ret) 934 drm_mode_object_put(dev, &connector->base); 935 936 out_unlock: 937 drm_modeset_unlock_all(dev); 938 939 return ret; 940 } 941 EXPORT_SYMBOL(drm_connector_init); 942 943 /** 944 * drm_connector_cleanup - cleans up an initialised connector 945 * @connector: connector to cleanup 946 * 947 * Cleans up the connector but doesn't free the object. 948 */ 949 void drm_connector_cleanup(struct drm_connector *connector) 950 { 951 struct drm_device *dev = connector->dev; 952 struct drm_display_mode *mode, *t; 953 954 if (connector->tile_group) { 955 drm_mode_put_tile_group(dev, connector->tile_group); 956 connector->tile_group = NULL; 957 } 958 959 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 960 drm_mode_remove(connector, mode); 961 962 list_for_each_entry_safe(mode, t, &connector->modes, head) 963 drm_mode_remove(connector, mode); 964 965 ida_remove(&drm_connector_enum_list[connector->connector_type].ida, 966 connector->connector_type_id); 967 968 kfree(connector->display_info.bus_formats); 969 drm_mode_object_put(dev, &connector->base); 970 kfree(connector->name); 971 connector->name = NULL; 972 list_del(&connector->head); 973 dev->mode_config.num_connector--; 974 975 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 976 if (connector->state && connector->funcs->atomic_destroy_state) 977 connector->funcs->atomic_destroy_state(connector, 978 connector->state); 979 980 memset(connector, 0, sizeof(*connector)); 981 } 982 EXPORT_SYMBOL(drm_connector_cleanup); 983 984 /** 985 * drm_connector_index - find the index of a registered connector 986 * @connector: connector to find index for 987 * 988 * Given a registered connector, return the index of that connector within a DRM 989 * device's list of connectors. 990 */ 991 unsigned int drm_connector_index(struct drm_connector *connector) 992 { 993 unsigned int index = 0; 994 struct drm_connector *tmp; 995 struct drm_mode_config *config = &connector->dev->mode_config; 996 997 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 998 999 drm_for_each_connector(tmp, connector->dev) { 1000 if (tmp == connector) 1001 return index; 1002 1003 index++; 1004 } 1005 1006 BUG(); 1007 } 1008 EXPORT_SYMBOL(drm_connector_index); 1009 1010 /** 1011 * drm_connector_register - register a connector 1012 * @connector: the connector to register 1013 * 1014 * Register userspace interfaces for a connector 1015 * 1016 * Returns: 1017 * Zero on success, error code on failure. 1018 */ 1019 int drm_connector_register(struct drm_connector *connector) 1020 { 1021 int ret; 1022 1023 drm_mode_object_register(connector->dev, &connector->base); 1024 1025 ret = drm_sysfs_connector_add(connector); 1026 if (ret) 1027 return ret; 1028 1029 ret = drm_debugfs_connector_add(connector); 1030 if (ret) { 1031 drm_sysfs_connector_remove(connector); 1032 return ret; 1033 } 1034 1035 return 0; 1036 } 1037 EXPORT_SYMBOL(drm_connector_register); 1038 1039 /** 1040 * drm_connector_unregister - unregister a connector 1041 * @connector: the connector to unregister 1042 * 1043 * Unregister userspace interfaces for a connector 1044 */ 1045 void drm_connector_unregister(struct drm_connector *connector) 1046 { 1047 drm_sysfs_connector_remove(connector); 1048 drm_debugfs_connector_remove(connector); 1049 } 1050 EXPORT_SYMBOL(drm_connector_unregister); 1051 1052 1053 /** 1054 * drm_connector_unplug_all - unregister connector userspace interfaces 1055 * @dev: drm device 1056 * 1057 * This function unregisters all connector userspace interfaces in sysfs. Should 1058 * be call when the device is disconnected, e.g. from an usb driver's 1059 * ->disconnect callback. 1060 */ 1061 void drm_connector_unplug_all(struct drm_device *dev) 1062 { 1063 struct drm_connector *connector; 1064 1065 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */ 1066 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1067 drm_connector_unregister(connector); 1068 1069 } 1070 EXPORT_SYMBOL(drm_connector_unplug_all); 1071 1072 /** 1073 * drm_encoder_init - Init a preallocated encoder 1074 * @dev: drm device 1075 * @encoder: the encoder to init 1076 * @funcs: callbacks for this encoder 1077 * @encoder_type: user visible type of the encoder 1078 * 1079 * Initialises a preallocated encoder. Encoder should be 1080 * subclassed as part of driver encoder objects. 1081 * 1082 * Returns: 1083 * Zero on success, error code on failure. 1084 */ 1085 int drm_encoder_init(struct drm_device *dev, 1086 struct drm_encoder *encoder, 1087 const struct drm_encoder_funcs *funcs, 1088 int encoder_type) 1089 { 1090 int ret; 1091 1092 drm_modeset_lock_all(dev); 1093 1094 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1095 if (ret) 1096 goto out_unlock; 1097 1098 encoder->dev = dev; 1099 encoder->encoder_type = encoder_type; 1100 encoder->funcs = funcs; 1101 encoder->name = kasprintf(GFP_KERNEL, "%s-%d", 1102 drm_encoder_enum_list[encoder_type].name, 1103 encoder->base.id); 1104 if (!encoder->name) { 1105 ret = -ENOMEM; 1106 goto out_put; 1107 } 1108 1109 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1110 dev->mode_config.num_encoder++; 1111 1112 out_put: 1113 if (ret) 1114 drm_mode_object_put(dev, &encoder->base); 1115 1116 out_unlock: 1117 drm_modeset_unlock_all(dev); 1118 1119 return ret; 1120 } 1121 EXPORT_SYMBOL(drm_encoder_init); 1122 1123 /** 1124 * drm_encoder_cleanup - cleans up an initialised encoder 1125 * @encoder: encoder to cleanup 1126 * 1127 * Cleans up the encoder but doesn't free the object. 1128 */ 1129 void drm_encoder_cleanup(struct drm_encoder *encoder) 1130 { 1131 struct drm_device *dev = encoder->dev; 1132 1133 drm_modeset_lock_all(dev); 1134 drm_mode_object_put(dev, &encoder->base); 1135 kfree(encoder->name); 1136 list_del(&encoder->head); 1137 dev->mode_config.num_encoder--; 1138 drm_modeset_unlock_all(dev); 1139 1140 memset(encoder, 0, sizeof(*encoder)); 1141 } 1142 EXPORT_SYMBOL(drm_encoder_cleanup); 1143 1144 /** 1145 * drm_universal_plane_init - Initialize a new universal plane object 1146 * @dev: DRM device 1147 * @plane: plane object to init 1148 * @possible_crtcs: bitmask of possible CRTCs 1149 * @funcs: callbacks for the new plane 1150 * @formats: array of supported formats (%DRM_FORMAT_*) 1151 * @format_count: number of elements in @formats 1152 * @type: type of plane (overlay, primary, cursor) 1153 * 1154 * Initializes a plane object of type @type. 1155 * 1156 * Returns: 1157 * Zero on success, error code on failure. 1158 */ 1159 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1160 unsigned long possible_crtcs, 1161 const struct drm_plane_funcs *funcs, 1162 const uint32_t *formats, unsigned int format_count, 1163 enum drm_plane_type type) 1164 { 1165 struct drm_mode_config *config = &dev->mode_config; 1166 int ret; 1167 1168 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1169 if (ret) 1170 return ret; 1171 1172 drm_modeset_lock_init(&plane->mutex); 1173 1174 plane->base.properties = &plane->properties; 1175 plane->dev = dev; 1176 plane->funcs = funcs; 1177 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t), 1178 GFP_KERNEL); 1179 if (!plane->format_types) { 1180 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1181 drm_mode_object_put(dev, &plane->base); 1182 return -ENOMEM; 1183 } 1184 1185 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1186 plane->format_count = format_count; 1187 plane->possible_crtcs = possible_crtcs; 1188 plane->type = type; 1189 1190 list_add_tail(&plane->head, &config->plane_list); 1191 config->num_total_plane++; 1192 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1193 config->num_overlay_plane++; 1194 1195 drm_object_attach_property(&plane->base, 1196 config->plane_type_property, 1197 plane->type); 1198 1199 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 1200 drm_object_attach_property(&plane->base, config->prop_fb_id, 0); 1201 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); 1202 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); 1203 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); 1204 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); 1205 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); 1206 drm_object_attach_property(&plane->base, config->prop_src_x, 0); 1207 drm_object_attach_property(&plane->base, config->prop_src_y, 0); 1208 drm_object_attach_property(&plane->base, config->prop_src_w, 0); 1209 drm_object_attach_property(&plane->base, config->prop_src_h, 0); 1210 } 1211 1212 return 0; 1213 } 1214 EXPORT_SYMBOL(drm_universal_plane_init); 1215 1216 /** 1217 * drm_plane_init - Initialize a legacy plane 1218 * @dev: DRM device 1219 * @plane: plane object to init 1220 * @possible_crtcs: bitmask of possible CRTCs 1221 * @funcs: callbacks for the new plane 1222 * @formats: array of supported formats (%DRM_FORMAT_*) 1223 * @format_count: number of elements in @formats 1224 * @is_primary: plane type (primary vs overlay) 1225 * 1226 * Legacy API to initialize a DRM plane. 1227 * 1228 * New drivers should call drm_universal_plane_init() instead. 1229 * 1230 * Returns: 1231 * Zero on success, error code on failure. 1232 */ 1233 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1234 unsigned long possible_crtcs, 1235 const struct drm_plane_funcs *funcs, 1236 const uint32_t *formats, unsigned int format_count, 1237 bool is_primary) 1238 { 1239 enum drm_plane_type type; 1240 1241 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1242 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1243 formats, format_count, type); 1244 } 1245 EXPORT_SYMBOL(drm_plane_init); 1246 1247 /** 1248 * drm_plane_cleanup - Clean up the core plane usage 1249 * @plane: plane to cleanup 1250 * 1251 * This function cleans up @plane and removes it from the DRM mode setting 1252 * core. Note that the function does *not* free the plane structure itself, 1253 * this is the responsibility of the caller. 1254 */ 1255 void drm_plane_cleanup(struct drm_plane *plane) 1256 { 1257 struct drm_device *dev = plane->dev; 1258 1259 drm_modeset_lock_all(dev); 1260 kfree(plane->format_types); 1261 drm_mode_object_put(dev, &plane->base); 1262 1263 BUG_ON(list_empty(&plane->head)); 1264 1265 list_del(&plane->head); 1266 dev->mode_config.num_total_plane--; 1267 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1268 dev->mode_config.num_overlay_plane--; 1269 drm_modeset_unlock_all(dev); 1270 1271 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1272 if (plane->state && plane->funcs->atomic_destroy_state) 1273 plane->funcs->atomic_destroy_state(plane, plane->state); 1274 1275 memset(plane, 0, sizeof(*plane)); 1276 } 1277 EXPORT_SYMBOL(drm_plane_cleanup); 1278 1279 /** 1280 * drm_plane_index - find the index of a registered plane 1281 * @plane: plane to find index for 1282 * 1283 * Given a registered plane, return the index of that CRTC within a DRM 1284 * device's list of planes. 1285 */ 1286 unsigned int drm_plane_index(struct drm_plane *plane) 1287 { 1288 unsigned int index = 0; 1289 struct drm_plane *tmp; 1290 1291 drm_for_each_plane(tmp, plane->dev) { 1292 if (tmp == plane) 1293 return index; 1294 1295 index++; 1296 } 1297 1298 BUG(); 1299 } 1300 EXPORT_SYMBOL(drm_plane_index); 1301 1302 /** 1303 * drm_plane_from_index - find the registered plane at an index 1304 * @dev: DRM device 1305 * @idx: index of registered plane to find for 1306 * 1307 * Given a plane index, return the registered plane from DRM device's 1308 * list of planes with matching index. 1309 */ 1310 struct drm_plane * 1311 drm_plane_from_index(struct drm_device *dev, int idx) 1312 { 1313 struct drm_plane *plane; 1314 unsigned int i = 0; 1315 1316 drm_for_each_plane(plane, dev) { 1317 if (i == idx) 1318 return plane; 1319 i++; 1320 } 1321 return NULL; 1322 } 1323 EXPORT_SYMBOL(drm_plane_from_index); 1324 1325 /** 1326 * drm_plane_force_disable - Forcibly disable a plane 1327 * @plane: plane to disable 1328 * 1329 * Forces the plane to be disabled. 1330 * 1331 * Used when the plane's current framebuffer is destroyed, 1332 * and when restoring fbdev mode. 1333 */ 1334 void drm_plane_force_disable(struct drm_plane *plane) 1335 { 1336 int ret; 1337 1338 if (!plane->fb) 1339 return; 1340 1341 plane->old_fb = plane->fb; 1342 ret = plane->funcs->disable_plane(plane); 1343 if (ret) { 1344 DRM_ERROR("failed to disable plane with busy fb\n"); 1345 plane->old_fb = NULL; 1346 return; 1347 } 1348 /* disconnect the plane from the fb and crtc: */ 1349 drm_framebuffer_unreference(plane->old_fb); 1350 plane->old_fb = NULL; 1351 plane->fb = NULL; 1352 plane->crtc = NULL; 1353 } 1354 EXPORT_SYMBOL(drm_plane_force_disable); 1355 1356 static int drm_mode_create_standard_properties(struct drm_device *dev) 1357 { 1358 struct drm_property *prop; 1359 1360 /* 1361 * Standard properties (apply to all connectors) 1362 */ 1363 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1364 DRM_MODE_PROP_IMMUTABLE, 1365 "EDID", 0); 1366 if (!prop) 1367 return -ENOMEM; 1368 dev->mode_config.edid_property = prop; 1369 1370 prop = drm_property_create_enum(dev, 0, 1371 "DPMS", drm_dpms_enum_list, 1372 ARRAY_SIZE(drm_dpms_enum_list)); 1373 if (!prop) 1374 return -ENOMEM; 1375 dev->mode_config.dpms_property = prop; 1376 1377 prop = drm_property_create(dev, 1378 DRM_MODE_PROP_BLOB | 1379 DRM_MODE_PROP_IMMUTABLE, 1380 "PATH", 0); 1381 if (!prop) 1382 return -ENOMEM; 1383 dev->mode_config.path_property = prop; 1384 1385 prop = drm_property_create(dev, 1386 DRM_MODE_PROP_BLOB | 1387 DRM_MODE_PROP_IMMUTABLE, 1388 "TILE", 0); 1389 if (!prop) 1390 return -ENOMEM; 1391 dev->mode_config.tile_property = prop; 1392 1393 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1394 "type", drm_plane_type_enum_list, 1395 ARRAY_SIZE(drm_plane_type_enum_list)); 1396 if (!prop) 1397 return -ENOMEM; 1398 dev->mode_config.plane_type_property = prop; 1399 1400 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1401 "SRC_X", 0, UINT_MAX); 1402 if (!prop) 1403 return -ENOMEM; 1404 dev->mode_config.prop_src_x = prop; 1405 1406 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1407 "SRC_Y", 0, UINT_MAX); 1408 if (!prop) 1409 return -ENOMEM; 1410 dev->mode_config.prop_src_y = prop; 1411 1412 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1413 "SRC_W", 0, UINT_MAX); 1414 if (!prop) 1415 return -ENOMEM; 1416 dev->mode_config.prop_src_w = prop; 1417 1418 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1419 "SRC_H", 0, UINT_MAX); 1420 if (!prop) 1421 return -ENOMEM; 1422 dev->mode_config.prop_src_h = prop; 1423 1424 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1425 "CRTC_X", INT_MIN, INT_MAX); 1426 if (!prop) 1427 return -ENOMEM; 1428 dev->mode_config.prop_crtc_x = prop; 1429 1430 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1431 "CRTC_Y", INT_MIN, INT_MAX); 1432 if (!prop) 1433 return -ENOMEM; 1434 dev->mode_config.prop_crtc_y = prop; 1435 1436 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1437 "CRTC_W", 0, INT_MAX); 1438 if (!prop) 1439 return -ENOMEM; 1440 dev->mode_config.prop_crtc_w = prop; 1441 1442 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1443 "CRTC_H", 0, INT_MAX); 1444 if (!prop) 1445 return -ENOMEM; 1446 dev->mode_config.prop_crtc_h = prop; 1447 1448 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1449 "FB_ID", DRM_MODE_OBJECT_FB); 1450 if (!prop) 1451 return -ENOMEM; 1452 dev->mode_config.prop_fb_id = prop; 1453 1454 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1455 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 1456 if (!prop) 1457 return -ENOMEM; 1458 dev->mode_config.prop_crtc_id = prop; 1459 1460 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 1461 "ACTIVE"); 1462 if (!prop) 1463 return -ENOMEM; 1464 dev->mode_config.prop_active = prop; 1465 1466 prop = drm_property_create(dev, 1467 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 1468 "MODE_ID", 0); 1469 if (!prop) 1470 return -ENOMEM; 1471 dev->mode_config.prop_mode_id = prop; 1472 1473 return 0; 1474 } 1475 1476 /** 1477 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1478 * @dev: DRM device 1479 * 1480 * Called by a driver the first time a DVI-I connector is made. 1481 */ 1482 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1483 { 1484 struct drm_property *dvi_i_selector; 1485 struct drm_property *dvi_i_subconnector; 1486 1487 if (dev->mode_config.dvi_i_select_subconnector_property) 1488 return 0; 1489 1490 dvi_i_selector = 1491 drm_property_create_enum(dev, 0, 1492 "select subconnector", 1493 drm_dvi_i_select_enum_list, 1494 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1495 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1496 1497 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1498 "subconnector", 1499 drm_dvi_i_subconnector_enum_list, 1500 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1501 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1502 1503 return 0; 1504 } 1505 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1506 1507 /** 1508 * drm_create_tv_properties - create TV specific connector properties 1509 * @dev: DRM device 1510 * @num_modes: number of different TV formats (modes) supported 1511 * @modes: array of pointers to strings containing name of each format 1512 * 1513 * Called by a driver's TV initialization routine, this function creates 1514 * the TV specific connector properties for a given device. Caller is 1515 * responsible for allocating a list of format names and passing them to 1516 * this routine. 1517 */ 1518 int drm_mode_create_tv_properties(struct drm_device *dev, 1519 unsigned int num_modes, 1520 const char * const modes[]) 1521 { 1522 struct drm_property *tv_selector; 1523 struct drm_property *tv_subconnector; 1524 unsigned int i; 1525 1526 if (dev->mode_config.tv_select_subconnector_property) 1527 return 0; 1528 1529 /* 1530 * Basic connector properties 1531 */ 1532 tv_selector = drm_property_create_enum(dev, 0, 1533 "select subconnector", 1534 drm_tv_select_enum_list, 1535 ARRAY_SIZE(drm_tv_select_enum_list)); 1536 if (!tv_selector) 1537 goto nomem; 1538 1539 dev->mode_config.tv_select_subconnector_property = tv_selector; 1540 1541 tv_subconnector = 1542 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1543 "subconnector", 1544 drm_tv_subconnector_enum_list, 1545 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1546 if (!tv_subconnector) 1547 goto nomem; 1548 dev->mode_config.tv_subconnector_property = tv_subconnector; 1549 1550 /* 1551 * Other, TV specific properties: margins & TV modes. 1552 */ 1553 dev->mode_config.tv_left_margin_property = 1554 drm_property_create_range(dev, 0, "left margin", 0, 100); 1555 if (!dev->mode_config.tv_left_margin_property) 1556 goto nomem; 1557 1558 dev->mode_config.tv_right_margin_property = 1559 drm_property_create_range(dev, 0, "right margin", 0, 100); 1560 if (!dev->mode_config.tv_right_margin_property) 1561 goto nomem; 1562 1563 dev->mode_config.tv_top_margin_property = 1564 drm_property_create_range(dev, 0, "top margin", 0, 100); 1565 if (!dev->mode_config.tv_top_margin_property) 1566 goto nomem; 1567 1568 dev->mode_config.tv_bottom_margin_property = 1569 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1570 if (!dev->mode_config.tv_bottom_margin_property) 1571 goto nomem; 1572 1573 dev->mode_config.tv_mode_property = 1574 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1575 "mode", num_modes); 1576 if (!dev->mode_config.tv_mode_property) 1577 goto nomem; 1578 1579 for (i = 0; i < num_modes; i++) 1580 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1581 i, modes[i]); 1582 1583 dev->mode_config.tv_brightness_property = 1584 drm_property_create_range(dev, 0, "brightness", 0, 100); 1585 if (!dev->mode_config.tv_brightness_property) 1586 goto nomem; 1587 1588 dev->mode_config.tv_contrast_property = 1589 drm_property_create_range(dev, 0, "contrast", 0, 100); 1590 if (!dev->mode_config.tv_contrast_property) 1591 goto nomem; 1592 1593 dev->mode_config.tv_flicker_reduction_property = 1594 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1595 if (!dev->mode_config.tv_flicker_reduction_property) 1596 goto nomem; 1597 1598 dev->mode_config.tv_overscan_property = 1599 drm_property_create_range(dev, 0, "overscan", 0, 100); 1600 if (!dev->mode_config.tv_overscan_property) 1601 goto nomem; 1602 1603 dev->mode_config.tv_saturation_property = 1604 drm_property_create_range(dev, 0, "saturation", 0, 100); 1605 if (!dev->mode_config.tv_saturation_property) 1606 goto nomem; 1607 1608 dev->mode_config.tv_hue_property = 1609 drm_property_create_range(dev, 0, "hue", 0, 100); 1610 if (!dev->mode_config.tv_hue_property) 1611 goto nomem; 1612 1613 return 0; 1614 nomem: 1615 return -ENOMEM; 1616 } 1617 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1618 1619 /** 1620 * drm_mode_create_scaling_mode_property - create scaling mode property 1621 * @dev: DRM device 1622 * 1623 * Called by a driver the first time it's needed, must be attached to desired 1624 * connectors. 1625 */ 1626 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1627 { 1628 struct drm_property *scaling_mode; 1629 1630 if (dev->mode_config.scaling_mode_property) 1631 return 0; 1632 1633 scaling_mode = 1634 drm_property_create_enum(dev, 0, "scaling mode", 1635 drm_scaling_mode_enum_list, 1636 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1637 1638 dev->mode_config.scaling_mode_property = scaling_mode; 1639 1640 return 0; 1641 } 1642 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1643 1644 /** 1645 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1646 * @dev: DRM device 1647 * 1648 * Called by a driver the first time it's needed, must be attached to desired 1649 * connectors. 1650 * 1651 * Returns: 1652 * Zero on success, negative errno on failure. 1653 */ 1654 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1655 { 1656 if (dev->mode_config.aspect_ratio_property) 1657 return 0; 1658 1659 dev->mode_config.aspect_ratio_property = 1660 drm_property_create_enum(dev, 0, "aspect ratio", 1661 drm_aspect_ratio_enum_list, 1662 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1663 1664 if (dev->mode_config.aspect_ratio_property == NULL) 1665 return -ENOMEM; 1666 1667 return 0; 1668 } 1669 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1670 1671 /** 1672 * drm_mode_create_dirty_property - create dirty property 1673 * @dev: DRM device 1674 * 1675 * Called by a driver the first time it's needed, must be attached to desired 1676 * connectors. 1677 */ 1678 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1679 { 1680 struct drm_property *dirty_info; 1681 1682 if (dev->mode_config.dirty_info_property) 1683 return 0; 1684 1685 dirty_info = 1686 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1687 "dirty", 1688 drm_dirty_info_enum_list, 1689 ARRAY_SIZE(drm_dirty_info_enum_list)); 1690 dev->mode_config.dirty_info_property = dirty_info; 1691 1692 return 0; 1693 } 1694 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1695 1696 /** 1697 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1698 * @dev: DRM device 1699 * 1700 * Create the the suggested x/y offset property for connectors. 1701 */ 1702 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1703 { 1704 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1705 return 0; 1706 1707 dev->mode_config.suggested_x_property = 1708 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1709 1710 dev->mode_config.suggested_y_property = 1711 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1712 1713 if (dev->mode_config.suggested_x_property == NULL || 1714 dev->mode_config.suggested_y_property == NULL) 1715 return -ENOMEM; 1716 return 0; 1717 } 1718 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1719 1720 /** 1721 * drm_mode_getresources - get graphics configuration 1722 * @dev: drm device for the ioctl 1723 * @data: data pointer for the ioctl 1724 * @file_priv: drm file for the ioctl call 1725 * 1726 * Construct a set of configuration description structures and return 1727 * them to the user, including CRTC, connector and framebuffer configuration. 1728 * 1729 * Called by the user via ioctl. 1730 * 1731 * Returns: 1732 * Zero on success, negative errno on failure. 1733 */ 1734 int drm_mode_getresources(struct drm_device *dev, void *data, 1735 struct drm_file *file_priv) 1736 { 1737 struct drm_mode_card_res *card_res = data; 1738 struct list_head *lh; 1739 struct drm_framebuffer *fb; 1740 struct drm_connector *connector; 1741 struct drm_crtc *crtc; 1742 struct drm_encoder *encoder; 1743 int ret = 0; 1744 int connector_count = 0; 1745 int crtc_count = 0; 1746 int fb_count = 0; 1747 int encoder_count = 0; 1748 int copied = 0; 1749 uint32_t __user *fb_id; 1750 uint32_t __user *crtc_id; 1751 uint32_t __user *connector_id; 1752 uint32_t __user *encoder_id; 1753 1754 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1755 return -EINVAL; 1756 1757 1758 mutex_lock(&file_priv->fbs_lock); 1759 /* 1760 * For the non-control nodes we need to limit the list of resources 1761 * by IDs in the group list for this node 1762 */ 1763 list_for_each(lh, &file_priv->fbs) 1764 fb_count++; 1765 1766 /* handle this in 4 parts */ 1767 /* FBs */ 1768 if (card_res->count_fbs >= fb_count) { 1769 copied = 0; 1770 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1771 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1772 if (put_user(fb->base.id, fb_id + copied)) { 1773 mutex_unlock(&file_priv->fbs_lock); 1774 return -EFAULT; 1775 } 1776 copied++; 1777 } 1778 } 1779 card_res->count_fbs = fb_count; 1780 mutex_unlock(&file_priv->fbs_lock); 1781 1782 /* mode_config.mutex protects the connector list against e.g. DP MST 1783 * connector hot-adding. CRTC/Plane lists are invariant. */ 1784 mutex_lock(&dev->mode_config.mutex); 1785 drm_for_each_crtc(crtc, dev) 1786 crtc_count++; 1787 1788 drm_for_each_connector(connector, dev) 1789 connector_count++; 1790 1791 drm_for_each_encoder(encoder, dev) 1792 encoder_count++; 1793 1794 card_res->max_height = dev->mode_config.max_height; 1795 card_res->min_height = dev->mode_config.min_height; 1796 card_res->max_width = dev->mode_config.max_width; 1797 card_res->min_width = dev->mode_config.min_width; 1798 1799 /* CRTCs */ 1800 if (card_res->count_crtcs >= crtc_count) { 1801 copied = 0; 1802 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1803 drm_for_each_crtc(crtc, dev) { 1804 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 1805 if (put_user(crtc->base.id, crtc_id + copied)) { 1806 ret = -EFAULT; 1807 goto out; 1808 } 1809 copied++; 1810 } 1811 } 1812 card_res->count_crtcs = crtc_count; 1813 1814 /* Encoders */ 1815 if (card_res->count_encoders >= encoder_count) { 1816 copied = 0; 1817 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1818 drm_for_each_encoder(encoder, dev) { 1819 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1820 encoder->name); 1821 if (put_user(encoder->base.id, encoder_id + 1822 copied)) { 1823 ret = -EFAULT; 1824 goto out; 1825 } 1826 copied++; 1827 } 1828 } 1829 card_res->count_encoders = encoder_count; 1830 1831 /* Connectors */ 1832 if (card_res->count_connectors >= connector_count) { 1833 copied = 0; 1834 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1835 drm_for_each_connector(connector, dev) { 1836 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1837 connector->base.id, 1838 connector->name); 1839 if (put_user(connector->base.id, 1840 connector_id + copied)) { 1841 ret = -EFAULT; 1842 goto out; 1843 } 1844 copied++; 1845 } 1846 } 1847 card_res->count_connectors = connector_count; 1848 1849 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1850 card_res->count_connectors, card_res->count_encoders); 1851 1852 out: 1853 mutex_unlock(&dev->mode_config.mutex); 1854 return ret; 1855 } 1856 1857 /** 1858 * drm_mode_getcrtc - get CRTC configuration 1859 * @dev: drm device for the ioctl 1860 * @data: data pointer for the ioctl 1861 * @file_priv: drm file for the ioctl call 1862 * 1863 * Construct a CRTC configuration structure to return to the user. 1864 * 1865 * Called by the user via ioctl. 1866 * 1867 * Returns: 1868 * Zero on success, negative errno on failure. 1869 */ 1870 int drm_mode_getcrtc(struct drm_device *dev, 1871 void *data, struct drm_file *file_priv) 1872 { 1873 struct drm_mode_crtc *crtc_resp = data; 1874 struct drm_crtc *crtc; 1875 1876 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1877 return -EINVAL; 1878 1879 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 1880 if (!crtc) 1881 return -ENOENT; 1882 1883 drm_modeset_lock_crtc(crtc, crtc->primary); 1884 crtc_resp->gamma_size = crtc->gamma_size; 1885 if (crtc->primary->fb) 1886 crtc_resp->fb_id = crtc->primary->fb->base.id; 1887 else 1888 crtc_resp->fb_id = 0; 1889 1890 if (crtc->state) { 1891 crtc_resp->x = crtc->primary->state->src_x >> 16; 1892 crtc_resp->y = crtc->primary->state->src_y >> 16; 1893 if (crtc->state->enable) { 1894 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); 1895 crtc_resp->mode_valid = 1; 1896 1897 } else { 1898 crtc_resp->mode_valid = 0; 1899 } 1900 } else { 1901 crtc_resp->x = crtc->x; 1902 crtc_resp->y = crtc->y; 1903 if (crtc->enabled) { 1904 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); 1905 crtc_resp->mode_valid = 1; 1906 1907 } else { 1908 crtc_resp->mode_valid = 0; 1909 } 1910 } 1911 drm_modeset_unlock_crtc(crtc); 1912 1913 return 0; 1914 } 1915 1916 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 1917 const struct drm_file *file_priv) 1918 { 1919 /* 1920 * If user-space hasn't configured the driver to expose the stereo 3D 1921 * modes, don't expose them. 1922 */ 1923 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 1924 return false; 1925 1926 return true; 1927 } 1928 1929 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 1930 { 1931 /* For atomic drivers only state objects are synchronously updated and 1932 * protected by modeset locks, so check those first. */ 1933 if (connector->state) 1934 return connector->state->best_encoder; 1935 return connector->encoder; 1936 } 1937 1938 /* helper for getconnector and getproperties ioctls */ 1939 static int get_properties(struct drm_mode_object *obj, bool atomic, 1940 uint32_t __user *prop_ptr, uint64_t __user *prop_values, 1941 uint32_t *arg_count_props) 1942 { 1943 int props_count; 1944 int i, ret, copied; 1945 1946 props_count = obj->properties->count; 1947 if (!atomic) 1948 props_count -= obj->properties->atomic_count; 1949 1950 if ((*arg_count_props >= props_count) && props_count) { 1951 for (i = 0, copied = 0; copied < props_count; i++) { 1952 struct drm_property *prop = obj->properties->properties[i]; 1953 uint64_t val; 1954 1955 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) 1956 continue; 1957 1958 ret = drm_object_property_get_value(obj, prop, &val); 1959 if (ret) 1960 return ret; 1961 1962 if (put_user(prop->base.id, prop_ptr + copied)) 1963 return -EFAULT; 1964 1965 if (put_user(val, prop_values + copied)) 1966 return -EFAULT; 1967 1968 copied++; 1969 } 1970 } 1971 *arg_count_props = props_count; 1972 1973 return 0; 1974 } 1975 1976 /** 1977 * drm_mode_getconnector - get connector configuration 1978 * @dev: drm device for the ioctl 1979 * @data: data pointer for the ioctl 1980 * @file_priv: drm file for the ioctl call 1981 * 1982 * Construct a connector configuration structure to return to the user. 1983 * 1984 * Called by the user via ioctl. 1985 * 1986 * Returns: 1987 * Zero on success, negative errno on failure. 1988 */ 1989 int drm_mode_getconnector(struct drm_device *dev, void *data, 1990 struct drm_file *file_priv) 1991 { 1992 struct drm_mode_get_connector *out_resp = data; 1993 struct drm_connector *connector; 1994 struct drm_encoder *encoder; 1995 struct drm_display_mode *mode; 1996 int mode_count = 0; 1997 int encoders_count = 0; 1998 int ret = 0; 1999 int copied = 0; 2000 int i; 2001 struct drm_mode_modeinfo u_mode; 2002 struct drm_mode_modeinfo __user *mode_ptr; 2003 uint32_t __user *encoder_ptr; 2004 2005 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2006 return -EINVAL; 2007 2008 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2009 2010 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 2011 2012 mutex_lock(&dev->mode_config.mutex); 2013 2014 connector = drm_connector_find(dev, out_resp->connector_id); 2015 if (!connector) { 2016 ret = -ENOENT; 2017 goto out_unlock; 2018 } 2019 2020 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) 2021 if (connector->encoder_ids[i] != 0) 2022 encoders_count++; 2023 2024 if (out_resp->count_modes == 0) { 2025 connector->funcs->fill_modes(connector, 2026 dev->mode_config.max_width, 2027 dev->mode_config.max_height); 2028 } 2029 2030 /* delayed so we get modes regardless of pre-fill_modes state */ 2031 list_for_each_entry(mode, &connector->modes, head) 2032 if (drm_mode_expose_to_userspace(mode, file_priv)) 2033 mode_count++; 2034 2035 out_resp->connector_id = connector->base.id; 2036 out_resp->connector_type = connector->connector_type; 2037 out_resp->connector_type_id = connector->connector_type_id; 2038 out_resp->mm_width = connector->display_info.width_mm; 2039 out_resp->mm_height = connector->display_info.height_mm; 2040 out_resp->subpixel = connector->display_info.subpixel_order; 2041 out_resp->connection = connector->status; 2042 2043 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2044 encoder = drm_connector_get_encoder(connector); 2045 if (encoder) 2046 out_resp->encoder_id = encoder->base.id; 2047 else 2048 out_resp->encoder_id = 0; 2049 2050 /* 2051 * This ioctl is called twice, once to determine how much space is 2052 * needed, and the 2nd time to fill it. 2053 */ 2054 if ((out_resp->count_modes >= mode_count) && mode_count) { 2055 copied = 0; 2056 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2057 list_for_each_entry(mode, &connector->modes, head) { 2058 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2059 continue; 2060 2061 drm_mode_convert_to_umode(&u_mode, mode); 2062 if (copy_to_user(mode_ptr + copied, 2063 &u_mode, sizeof(u_mode))) { 2064 ret = -EFAULT; 2065 goto out; 2066 } 2067 copied++; 2068 } 2069 } 2070 out_resp->count_modes = mode_count; 2071 2072 ret = get_properties(&connector->base, file_priv->atomic, 2073 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2074 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2075 &out_resp->count_props); 2076 if (ret) 2077 goto out; 2078 2079 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2080 copied = 0; 2081 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2082 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2083 if (connector->encoder_ids[i] != 0) { 2084 if (put_user(connector->encoder_ids[i], 2085 encoder_ptr + copied)) { 2086 ret = -EFAULT; 2087 goto out; 2088 } 2089 copied++; 2090 } 2091 } 2092 } 2093 out_resp->count_encoders = encoders_count; 2094 2095 out: 2096 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2097 2098 out_unlock: 2099 mutex_unlock(&dev->mode_config.mutex); 2100 2101 return ret; 2102 } 2103 2104 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2105 { 2106 struct drm_connector *connector; 2107 struct drm_device *dev = encoder->dev; 2108 bool uses_atomic = false; 2109 2110 /* For atomic drivers only state objects are synchronously updated and 2111 * protected by modeset locks, so check those first. */ 2112 drm_for_each_connector(connector, dev) { 2113 if (!connector->state) 2114 continue; 2115 2116 uses_atomic = true; 2117 2118 if (connector->state->best_encoder != encoder) 2119 continue; 2120 2121 return connector->state->crtc; 2122 } 2123 2124 /* Don't return stale data (e.g. pending async disable). */ 2125 if (uses_atomic) 2126 return NULL; 2127 2128 return encoder->crtc; 2129 } 2130 2131 /** 2132 * drm_mode_getencoder - get encoder configuration 2133 * @dev: drm device for the ioctl 2134 * @data: data pointer for the ioctl 2135 * @file_priv: drm file for the ioctl call 2136 * 2137 * Construct a encoder configuration structure to return to the user. 2138 * 2139 * Called by the user via ioctl. 2140 * 2141 * Returns: 2142 * Zero on success, negative errno on failure. 2143 */ 2144 int drm_mode_getencoder(struct drm_device *dev, void *data, 2145 struct drm_file *file_priv) 2146 { 2147 struct drm_mode_get_encoder *enc_resp = data; 2148 struct drm_encoder *encoder; 2149 struct drm_crtc *crtc; 2150 2151 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2152 return -EINVAL; 2153 2154 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2155 if (!encoder) 2156 return -ENOENT; 2157 2158 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2159 crtc = drm_encoder_get_crtc(encoder); 2160 if (crtc) 2161 enc_resp->crtc_id = crtc->base.id; 2162 else 2163 enc_resp->crtc_id = 0; 2164 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2165 2166 enc_resp->encoder_type = encoder->encoder_type; 2167 enc_resp->encoder_id = encoder->base.id; 2168 enc_resp->possible_crtcs = encoder->possible_crtcs; 2169 enc_resp->possible_clones = encoder->possible_clones; 2170 2171 return 0; 2172 } 2173 2174 /** 2175 * drm_mode_getplane_res - enumerate all plane resources 2176 * @dev: DRM device 2177 * @data: ioctl data 2178 * @file_priv: DRM file info 2179 * 2180 * Construct a list of plane ids to return to the user. 2181 * 2182 * Called by the user via ioctl. 2183 * 2184 * Returns: 2185 * Zero on success, negative errno on failure. 2186 */ 2187 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2188 struct drm_file *file_priv) 2189 { 2190 struct drm_mode_get_plane_res *plane_resp = data; 2191 struct drm_mode_config *config; 2192 struct drm_plane *plane; 2193 uint32_t __user *plane_ptr; 2194 int copied = 0; 2195 unsigned num_planes; 2196 2197 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2198 return -EINVAL; 2199 2200 config = &dev->mode_config; 2201 2202 if (file_priv->universal_planes) 2203 num_planes = config->num_total_plane; 2204 else 2205 num_planes = config->num_overlay_plane; 2206 2207 /* 2208 * This ioctl is called twice, once to determine how much space is 2209 * needed, and the 2nd time to fill it. 2210 */ 2211 if (num_planes && 2212 (plane_resp->count_planes >= num_planes)) { 2213 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2214 2215 /* Plane lists are invariant, no locking needed. */ 2216 drm_for_each_plane(plane, dev) { 2217 /* 2218 * Unless userspace set the 'universal planes' 2219 * capability bit, only advertise overlays. 2220 */ 2221 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2222 !file_priv->universal_planes) 2223 continue; 2224 2225 if (put_user(plane->base.id, plane_ptr + copied)) 2226 return -EFAULT; 2227 copied++; 2228 } 2229 } 2230 plane_resp->count_planes = num_planes; 2231 2232 return 0; 2233 } 2234 2235 /** 2236 * drm_mode_getplane - get plane configuration 2237 * @dev: DRM device 2238 * @data: ioctl data 2239 * @file_priv: DRM file info 2240 * 2241 * Construct a plane configuration structure to return to the user. 2242 * 2243 * Called by the user via ioctl. 2244 * 2245 * Returns: 2246 * Zero on success, negative errno on failure. 2247 */ 2248 int drm_mode_getplane(struct drm_device *dev, void *data, 2249 struct drm_file *file_priv) 2250 { 2251 struct drm_mode_get_plane *plane_resp = data; 2252 struct drm_plane *plane; 2253 uint32_t __user *format_ptr; 2254 2255 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2256 return -EINVAL; 2257 2258 plane = drm_plane_find(dev, plane_resp->plane_id); 2259 if (!plane) 2260 return -ENOENT; 2261 2262 drm_modeset_lock(&plane->mutex, NULL); 2263 if (plane->crtc) 2264 plane_resp->crtc_id = plane->crtc->base.id; 2265 else 2266 plane_resp->crtc_id = 0; 2267 2268 if (plane->fb) 2269 plane_resp->fb_id = plane->fb->base.id; 2270 else 2271 plane_resp->fb_id = 0; 2272 drm_modeset_unlock(&plane->mutex); 2273 2274 plane_resp->plane_id = plane->base.id; 2275 plane_resp->possible_crtcs = plane->possible_crtcs; 2276 plane_resp->gamma_size = 0; 2277 2278 /* 2279 * This ioctl is called twice, once to determine how much space is 2280 * needed, and the 2nd time to fill it. 2281 */ 2282 if (plane->format_count && 2283 (plane_resp->count_format_types >= plane->format_count)) { 2284 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2285 if (copy_to_user(format_ptr, 2286 plane->format_types, 2287 sizeof(uint32_t) * plane->format_count)) { 2288 return -EFAULT; 2289 } 2290 } 2291 plane_resp->count_format_types = plane->format_count; 2292 2293 return 0; 2294 } 2295 2296 /** 2297 * drm_plane_check_pixel_format - Check if the plane supports the pixel format 2298 * @plane: plane to check for format support 2299 * @format: the pixel format 2300 * 2301 * Returns: 2302 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL 2303 * otherwise. 2304 */ 2305 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format) 2306 { 2307 unsigned int i; 2308 2309 for (i = 0; i < plane->format_count; i++) { 2310 if (format == plane->format_types[i]) 2311 return 0; 2312 } 2313 2314 return -EINVAL; 2315 } 2316 2317 static int check_src_coords(uint32_t src_x, uint32_t src_y, 2318 uint32_t src_w, uint32_t src_h, 2319 const struct drm_framebuffer *fb) 2320 { 2321 unsigned int fb_width, fb_height; 2322 2323 fb_width = fb->width << 16; 2324 fb_height = fb->height << 16; 2325 2326 /* Make sure source coordinates are inside the fb. */ 2327 if (src_w > fb_width || 2328 src_x > fb_width - src_w || 2329 src_h > fb_height || 2330 src_y > fb_height - src_h) { 2331 DRM_DEBUG_KMS("Invalid source coordinates " 2332 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2333 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2334 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2335 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2336 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2337 return -ENOSPC; 2338 } 2339 2340 return 0; 2341 } 2342 2343 /* 2344 * setplane_internal - setplane handler for internal callers 2345 * 2346 * Note that we assume an extra reference has already been taken on fb. If the 2347 * update fails, this reference will be dropped before return; if it succeeds, 2348 * the previous framebuffer (if any) will be unreferenced instead. 2349 * 2350 * src_{x,y,w,h} are provided in 16.16 fixed point format 2351 */ 2352 static int __setplane_internal(struct drm_plane *plane, 2353 struct drm_crtc *crtc, 2354 struct drm_framebuffer *fb, 2355 int32_t crtc_x, int32_t crtc_y, 2356 uint32_t crtc_w, uint32_t crtc_h, 2357 /* src_{x,y,w,h} values are 16.16 fixed point */ 2358 uint32_t src_x, uint32_t src_y, 2359 uint32_t src_w, uint32_t src_h) 2360 { 2361 int ret = 0; 2362 2363 /* No fb means shut it down */ 2364 if (!fb) { 2365 plane->old_fb = plane->fb; 2366 ret = plane->funcs->disable_plane(plane); 2367 if (!ret) { 2368 plane->crtc = NULL; 2369 plane->fb = NULL; 2370 } else { 2371 plane->old_fb = NULL; 2372 } 2373 goto out; 2374 } 2375 2376 /* Check whether this plane is usable on this CRTC */ 2377 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2378 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2379 ret = -EINVAL; 2380 goto out; 2381 } 2382 2383 /* Check whether this plane supports the fb pixel format. */ 2384 ret = drm_plane_check_pixel_format(plane, fb->pixel_format); 2385 if (ret) { 2386 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2387 drm_get_format_name(fb->pixel_format)); 2388 goto out; 2389 } 2390 2391 /* Give drivers some help against integer overflows */ 2392 if (crtc_w > INT_MAX || 2393 crtc_x > INT_MAX - (int32_t) crtc_w || 2394 crtc_h > INT_MAX || 2395 crtc_y > INT_MAX - (int32_t) crtc_h) { 2396 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2397 crtc_w, crtc_h, crtc_x, crtc_y); 2398 ret = -ERANGE; 2399 goto out; 2400 } 2401 2402 ret = check_src_coords(src_x, src_y, src_w, src_h, fb); 2403 if (ret) 2404 goto out; 2405 2406 plane->old_fb = plane->fb; 2407 ret = plane->funcs->update_plane(plane, crtc, fb, 2408 crtc_x, crtc_y, crtc_w, crtc_h, 2409 src_x, src_y, src_w, src_h); 2410 if (!ret) { 2411 plane->crtc = crtc; 2412 plane->fb = fb; 2413 fb = NULL; 2414 } else { 2415 plane->old_fb = NULL; 2416 } 2417 2418 out: 2419 if (fb) 2420 drm_framebuffer_unreference(fb); 2421 if (plane->old_fb) 2422 drm_framebuffer_unreference(plane->old_fb); 2423 plane->old_fb = NULL; 2424 2425 return ret; 2426 } 2427 2428 static int setplane_internal(struct drm_plane *plane, 2429 struct drm_crtc *crtc, 2430 struct drm_framebuffer *fb, 2431 int32_t crtc_x, int32_t crtc_y, 2432 uint32_t crtc_w, uint32_t crtc_h, 2433 /* src_{x,y,w,h} values are 16.16 fixed point */ 2434 uint32_t src_x, uint32_t src_y, 2435 uint32_t src_w, uint32_t src_h) 2436 { 2437 int ret; 2438 2439 drm_modeset_lock_all(plane->dev); 2440 ret = __setplane_internal(plane, crtc, fb, 2441 crtc_x, crtc_y, crtc_w, crtc_h, 2442 src_x, src_y, src_w, src_h); 2443 drm_modeset_unlock_all(plane->dev); 2444 2445 return ret; 2446 } 2447 2448 /** 2449 * drm_mode_setplane - configure a plane's configuration 2450 * @dev: DRM device 2451 * @data: ioctl data* 2452 * @file_priv: DRM file info 2453 * 2454 * Set plane configuration, including placement, fb, scaling, and other factors. 2455 * Or pass a NULL fb to disable (planes may be disabled without providing a 2456 * valid crtc). 2457 * 2458 * Returns: 2459 * Zero on success, negative errno on failure. 2460 */ 2461 int drm_mode_setplane(struct drm_device *dev, void *data, 2462 struct drm_file *file_priv) 2463 { 2464 struct drm_mode_set_plane *plane_req = data; 2465 struct drm_plane *plane; 2466 struct drm_crtc *crtc = NULL; 2467 struct drm_framebuffer *fb = NULL; 2468 2469 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2470 return -EINVAL; 2471 2472 /* 2473 * First, find the plane, crtc, and fb objects. If not available, 2474 * we don't bother to call the driver. 2475 */ 2476 plane = drm_plane_find(dev, plane_req->plane_id); 2477 if (!plane) { 2478 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2479 plane_req->plane_id); 2480 return -ENOENT; 2481 } 2482 2483 if (plane_req->fb_id) { 2484 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2485 if (!fb) { 2486 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2487 plane_req->fb_id); 2488 return -ENOENT; 2489 } 2490 2491 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2492 if (!crtc) { 2493 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2494 plane_req->crtc_id); 2495 return -ENOENT; 2496 } 2497 } 2498 2499 /* 2500 * setplane_internal will take care of deref'ing either the old or new 2501 * framebuffer depending on success. 2502 */ 2503 return setplane_internal(plane, crtc, fb, 2504 plane_req->crtc_x, plane_req->crtc_y, 2505 plane_req->crtc_w, plane_req->crtc_h, 2506 plane_req->src_x, plane_req->src_y, 2507 plane_req->src_w, plane_req->src_h); 2508 } 2509 2510 /** 2511 * drm_mode_set_config_internal - helper to call ->set_config 2512 * @set: modeset config to set 2513 * 2514 * This is a little helper to wrap internal calls to the ->set_config driver 2515 * interface. The only thing it adds is correct refcounting dance. 2516 * 2517 * Returns: 2518 * Zero on success, negative errno on failure. 2519 */ 2520 int drm_mode_set_config_internal(struct drm_mode_set *set) 2521 { 2522 struct drm_crtc *crtc = set->crtc; 2523 struct drm_framebuffer *fb; 2524 struct drm_crtc *tmp; 2525 int ret; 2526 2527 /* 2528 * NOTE: ->set_config can also disable other crtcs (if we steal all 2529 * connectors from it), hence we need to refcount the fbs across all 2530 * crtcs. Atomic modeset will have saner semantics ... 2531 */ 2532 drm_for_each_crtc(tmp, crtc->dev) 2533 tmp->primary->old_fb = tmp->primary->fb; 2534 2535 fb = set->fb; 2536 2537 ret = crtc->funcs->set_config(set); 2538 if (ret == 0) { 2539 crtc->primary->crtc = crtc; 2540 crtc->primary->fb = fb; 2541 } 2542 2543 drm_for_each_crtc(tmp, crtc->dev) { 2544 if (tmp->primary->fb) 2545 drm_framebuffer_reference(tmp->primary->fb); 2546 if (tmp->primary->old_fb) 2547 drm_framebuffer_unreference(tmp->primary->old_fb); 2548 tmp->primary->old_fb = NULL; 2549 } 2550 2551 return ret; 2552 } 2553 EXPORT_SYMBOL(drm_mode_set_config_internal); 2554 2555 /** 2556 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode 2557 * @mode: mode to query 2558 * @hdisplay: hdisplay value to fill in 2559 * @vdisplay: vdisplay value to fill in 2560 * 2561 * The vdisplay value will be doubled if the specified mode is a stereo mode of 2562 * the appropriate layout. 2563 */ 2564 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, 2565 int *hdisplay, int *vdisplay) 2566 { 2567 struct drm_display_mode adjusted; 2568 2569 drm_mode_copy(&adjusted, mode); 2570 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 2571 *hdisplay = adjusted.crtc_hdisplay; 2572 *vdisplay = adjusted.crtc_vdisplay; 2573 } 2574 EXPORT_SYMBOL(drm_crtc_get_hv_timing); 2575 2576 /** 2577 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2578 * CRTC viewport 2579 * @crtc: CRTC that framebuffer will be displayed on 2580 * @x: x panning 2581 * @y: y panning 2582 * @mode: mode that framebuffer will be displayed under 2583 * @fb: framebuffer to check size of 2584 */ 2585 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2586 int x, int y, 2587 const struct drm_display_mode *mode, 2588 const struct drm_framebuffer *fb) 2589 2590 { 2591 int hdisplay, vdisplay; 2592 2593 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); 2594 2595 if (crtc->state && 2596 crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) | 2597 BIT(DRM_ROTATE_270))) 2598 swap(hdisplay, vdisplay); 2599 2600 return check_src_coords(x << 16, y << 16, 2601 hdisplay << 16, vdisplay << 16, fb); 2602 } 2603 EXPORT_SYMBOL(drm_crtc_check_viewport); 2604 2605 /** 2606 * drm_mode_setcrtc - set CRTC configuration 2607 * @dev: drm device for the ioctl 2608 * @data: data pointer for the ioctl 2609 * @file_priv: drm file for the ioctl call 2610 * 2611 * Build a new CRTC configuration based on user request. 2612 * 2613 * Called by the user via ioctl. 2614 * 2615 * Returns: 2616 * Zero on success, negative errno on failure. 2617 */ 2618 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2619 struct drm_file *file_priv) 2620 { 2621 struct drm_mode_config *config = &dev->mode_config; 2622 struct drm_mode_crtc *crtc_req = data; 2623 struct drm_crtc *crtc; 2624 struct drm_connector **connector_set = NULL, *connector; 2625 struct drm_framebuffer *fb = NULL; 2626 struct drm_display_mode *mode = NULL; 2627 struct drm_mode_set set; 2628 uint32_t __user *set_connectors_ptr; 2629 int ret; 2630 int i; 2631 2632 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2633 return -EINVAL; 2634 2635 /* 2636 * Universal plane src offsets are only 16.16, prevent havoc for 2637 * drivers using universal plane code internally. 2638 */ 2639 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) 2640 return -ERANGE; 2641 2642 drm_modeset_lock_all(dev); 2643 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2644 if (!crtc) { 2645 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2646 ret = -ENOENT; 2647 goto out; 2648 } 2649 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 2650 2651 if (crtc_req->mode_valid) { 2652 /* If we have a mode we need a framebuffer. */ 2653 /* If we pass -1, set the mode with the currently bound fb */ 2654 if (crtc_req->fb_id == -1) { 2655 if (!crtc->primary->fb) { 2656 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2657 ret = -EINVAL; 2658 goto out; 2659 } 2660 fb = crtc->primary->fb; 2661 /* Make refcounting symmetric with the lookup path. */ 2662 drm_framebuffer_reference(fb); 2663 } else { 2664 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2665 if (!fb) { 2666 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2667 crtc_req->fb_id); 2668 ret = -ENOENT; 2669 goto out; 2670 } 2671 } 2672 2673 mode = drm_mode_create(dev); 2674 if (!mode) { 2675 ret = -ENOMEM; 2676 goto out; 2677 } 2678 2679 ret = drm_mode_convert_umode(mode, &crtc_req->mode); 2680 if (ret) { 2681 DRM_DEBUG_KMS("Invalid mode\n"); 2682 goto out; 2683 } 2684 2685 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 2686 2687 /* 2688 * Check whether the primary plane supports the fb pixel format. 2689 * Drivers not implementing the universal planes API use a 2690 * default formats list provided by the DRM core which doesn't 2691 * match real hardware capabilities. Skip the check in that 2692 * case. 2693 */ 2694 if (!crtc->primary->format_default) { 2695 ret = drm_plane_check_pixel_format(crtc->primary, 2696 fb->pixel_format); 2697 if (ret) { 2698 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2699 drm_get_format_name(fb->pixel_format)); 2700 goto out; 2701 } 2702 } 2703 2704 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2705 mode, fb); 2706 if (ret) 2707 goto out; 2708 2709 } 2710 2711 if (crtc_req->count_connectors == 0 && mode) { 2712 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2713 ret = -EINVAL; 2714 goto out; 2715 } 2716 2717 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2718 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2719 crtc_req->count_connectors); 2720 ret = -EINVAL; 2721 goto out; 2722 } 2723 2724 if (crtc_req->count_connectors > 0) { 2725 u32 out_id; 2726 2727 /* Avoid unbounded kernel memory allocation */ 2728 if (crtc_req->count_connectors > config->num_connector) { 2729 ret = -EINVAL; 2730 goto out; 2731 } 2732 2733 connector_set = kmalloc_array(crtc_req->count_connectors, 2734 sizeof(struct drm_connector *), 2735 GFP_KERNEL); 2736 if (!connector_set) { 2737 ret = -ENOMEM; 2738 goto out; 2739 } 2740 2741 for (i = 0; i < crtc_req->count_connectors; i++) { 2742 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2743 if (get_user(out_id, &set_connectors_ptr[i])) { 2744 ret = -EFAULT; 2745 goto out; 2746 } 2747 2748 connector = drm_connector_find(dev, out_id); 2749 if (!connector) { 2750 DRM_DEBUG_KMS("Connector id %d unknown\n", 2751 out_id); 2752 ret = -ENOENT; 2753 goto out; 2754 } 2755 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2756 connector->base.id, 2757 connector->name); 2758 2759 connector_set[i] = connector; 2760 } 2761 } 2762 2763 set.crtc = crtc; 2764 set.x = crtc_req->x; 2765 set.y = crtc_req->y; 2766 set.mode = mode; 2767 set.connectors = connector_set; 2768 set.num_connectors = crtc_req->count_connectors; 2769 set.fb = fb; 2770 ret = drm_mode_set_config_internal(&set); 2771 2772 out: 2773 if (fb) 2774 drm_framebuffer_unreference(fb); 2775 2776 kfree(connector_set); 2777 drm_mode_destroy(dev, mode); 2778 drm_modeset_unlock_all(dev); 2779 return ret; 2780 } 2781 2782 /** 2783 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2784 * universal plane handler call 2785 * @crtc: crtc to update cursor for 2786 * @req: data pointer for the ioctl 2787 * @file_priv: drm file for the ioctl call 2788 * 2789 * Legacy cursor ioctl's work directly with driver buffer handles. To 2790 * translate legacy ioctl calls into universal plane handler calls, we need to 2791 * wrap the native buffer handle in a drm_framebuffer. 2792 * 2793 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2794 * buffer with a pitch of 4*width; the universal plane interface should be used 2795 * directly in cases where the hardware can support other buffer settings and 2796 * userspace wants to make use of these capabilities. 2797 * 2798 * Returns: 2799 * Zero on success, negative errno on failure. 2800 */ 2801 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2802 struct drm_mode_cursor2 *req, 2803 struct drm_file *file_priv) 2804 { 2805 struct drm_device *dev = crtc->dev; 2806 struct drm_framebuffer *fb = NULL; 2807 struct drm_mode_fb_cmd2 fbreq = { 2808 .width = req->width, 2809 .height = req->height, 2810 .pixel_format = DRM_FORMAT_ARGB8888, 2811 .pitches = { req->width * 4 }, 2812 .handles = { req->handle }, 2813 }; 2814 int32_t crtc_x, crtc_y; 2815 uint32_t crtc_w = 0, crtc_h = 0; 2816 uint32_t src_w = 0, src_h = 0; 2817 int ret = 0; 2818 2819 BUG_ON(!crtc->cursor); 2820 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2821 2822 /* 2823 * Obtain fb we'll be using (either new or existing) and take an extra 2824 * reference to it if fb != null. setplane will take care of dropping 2825 * the reference if the plane update fails. 2826 */ 2827 if (req->flags & DRM_MODE_CURSOR_BO) { 2828 if (req->handle) { 2829 fb = internal_framebuffer_create(dev, &fbreq, file_priv); 2830 if (IS_ERR(fb)) { 2831 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2832 return PTR_ERR(fb); 2833 } 2834 } else { 2835 fb = NULL; 2836 } 2837 } else { 2838 fb = crtc->cursor->fb; 2839 if (fb) 2840 drm_framebuffer_reference(fb); 2841 } 2842 2843 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2844 crtc_x = req->x; 2845 crtc_y = req->y; 2846 } else { 2847 crtc_x = crtc->cursor_x; 2848 crtc_y = crtc->cursor_y; 2849 } 2850 2851 if (fb) { 2852 crtc_w = fb->width; 2853 crtc_h = fb->height; 2854 src_w = fb->width << 16; 2855 src_h = fb->height << 16; 2856 } 2857 2858 /* 2859 * setplane_internal will take care of deref'ing either the old or new 2860 * framebuffer depending on success. 2861 */ 2862 ret = __setplane_internal(crtc->cursor, crtc, fb, 2863 crtc_x, crtc_y, crtc_w, crtc_h, 2864 0, 0, src_w, src_h); 2865 2866 /* Update successful; save new cursor position, if necessary */ 2867 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2868 crtc->cursor_x = req->x; 2869 crtc->cursor_y = req->y; 2870 } 2871 2872 return ret; 2873 } 2874 2875 static int drm_mode_cursor_common(struct drm_device *dev, 2876 struct drm_mode_cursor2 *req, 2877 struct drm_file *file_priv) 2878 { 2879 struct drm_crtc *crtc; 2880 int ret = 0; 2881 2882 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2883 return -EINVAL; 2884 2885 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 2886 return -EINVAL; 2887 2888 crtc = drm_crtc_find(dev, req->crtc_id); 2889 if (!crtc) { 2890 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 2891 return -ENOENT; 2892 } 2893 2894 /* 2895 * If this crtc has a universal cursor plane, call that plane's update 2896 * handler rather than using legacy cursor handlers. 2897 */ 2898 drm_modeset_lock_crtc(crtc, crtc->cursor); 2899 if (crtc->cursor) { 2900 ret = drm_mode_cursor_universal(crtc, req, file_priv); 2901 goto out; 2902 } 2903 2904 if (req->flags & DRM_MODE_CURSOR_BO) { 2905 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 2906 ret = -ENXIO; 2907 goto out; 2908 } 2909 /* Turns off the cursor if handle is 0 */ 2910 if (crtc->funcs->cursor_set2) 2911 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 2912 req->width, req->height, req->hot_x, req->hot_y); 2913 else 2914 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 2915 req->width, req->height); 2916 } 2917 2918 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2919 if (crtc->funcs->cursor_move) { 2920 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 2921 } else { 2922 ret = -EFAULT; 2923 goto out; 2924 } 2925 } 2926 out: 2927 drm_modeset_unlock_crtc(crtc); 2928 2929 return ret; 2930 2931 } 2932 2933 2934 /** 2935 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 2936 * @dev: drm device for the ioctl 2937 * @data: data pointer for the ioctl 2938 * @file_priv: drm file for the ioctl call 2939 * 2940 * Set the cursor configuration based on user request. 2941 * 2942 * Called by the user via ioctl. 2943 * 2944 * Returns: 2945 * Zero on success, negative errno on failure. 2946 */ 2947 int drm_mode_cursor_ioctl(struct drm_device *dev, 2948 void *data, struct drm_file *file_priv) 2949 { 2950 struct drm_mode_cursor *req = data; 2951 struct drm_mode_cursor2 new_req; 2952 2953 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 2954 new_req.hot_x = new_req.hot_y = 0; 2955 2956 return drm_mode_cursor_common(dev, &new_req, file_priv); 2957 } 2958 2959 /** 2960 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 2961 * @dev: drm device for the ioctl 2962 * @data: data pointer for the ioctl 2963 * @file_priv: drm file for the ioctl call 2964 * 2965 * Set the cursor configuration based on user request. This implements the 2nd 2966 * version of the cursor ioctl, which allows userspace to additionally specify 2967 * the hotspot of the pointer. 2968 * 2969 * Called by the user via ioctl. 2970 * 2971 * Returns: 2972 * Zero on success, negative errno on failure. 2973 */ 2974 int drm_mode_cursor2_ioctl(struct drm_device *dev, 2975 void *data, struct drm_file *file_priv) 2976 { 2977 struct drm_mode_cursor2 *req = data; 2978 2979 return drm_mode_cursor_common(dev, req, file_priv); 2980 } 2981 2982 /** 2983 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 2984 * @bpp: bits per pixels 2985 * @depth: bit depth per pixel 2986 * 2987 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 2988 * Useful in fbdev emulation code, since that deals in those values. 2989 */ 2990 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 2991 { 2992 uint32_t fmt; 2993 2994 switch (bpp) { 2995 case 8: 2996 fmt = DRM_FORMAT_C8; 2997 break; 2998 case 16: 2999 if (depth == 15) 3000 fmt = DRM_FORMAT_XRGB1555; 3001 else 3002 fmt = DRM_FORMAT_RGB565; 3003 break; 3004 case 24: 3005 fmt = DRM_FORMAT_RGB888; 3006 break; 3007 case 32: 3008 if (depth == 24) 3009 fmt = DRM_FORMAT_XRGB8888; 3010 else if (depth == 30) 3011 fmt = DRM_FORMAT_XRGB2101010; 3012 else 3013 fmt = DRM_FORMAT_ARGB8888; 3014 break; 3015 default: 3016 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3017 fmt = DRM_FORMAT_XRGB8888; 3018 break; 3019 } 3020 3021 return fmt; 3022 } 3023 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3024 3025 /** 3026 * drm_mode_addfb - add an FB to the graphics configuration 3027 * @dev: drm device for the ioctl 3028 * @data: data pointer for the ioctl 3029 * @file_priv: drm file for the ioctl call 3030 * 3031 * Add a new FB to the specified CRTC, given a user request. This is the 3032 * original addfb ioctl which only supported RGB formats. 3033 * 3034 * Called by the user via ioctl. 3035 * 3036 * Returns: 3037 * Zero on success, negative errno on failure. 3038 */ 3039 int drm_mode_addfb(struct drm_device *dev, 3040 void *data, struct drm_file *file_priv) 3041 { 3042 struct drm_mode_fb_cmd *or = data; 3043 struct drm_mode_fb_cmd2 r = {}; 3044 int ret; 3045 3046 /* convert to new format and call new ioctl */ 3047 r.fb_id = or->fb_id; 3048 r.width = or->width; 3049 r.height = or->height; 3050 r.pitches[0] = or->pitch; 3051 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3052 r.handles[0] = or->handle; 3053 3054 ret = drm_mode_addfb2(dev, &r, file_priv); 3055 if (ret) 3056 return ret; 3057 3058 or->fb_id = r.fb_id; 3059 3060 return 0; 3061 } 3062 3063 static int format_check(const struct drm_mode_fb_cmd2 *r) 3064 { 3065 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3066 3067 switch (format) { 3068 case DRM_FORMAT_C8: 3069 case DRM_FORMAT_RGB332: 3070 case DRM_FORMAT_BGR233: 3071 case DRM_FORMAT_XRGB4444: 3072 case DRM_FORMAT_XBGR4444: 3073 case DRM_FORMAT_RGBX4444: 3074 case DRM_FORMAT_BGRX4444: 3075 case DRM_FORMAT_ARGB4444: 3076 case DRM_FORMAT_ABGR4444: 3077 case DRM_FORMAT_RGBA4444: 3078 case DRM_FORMAT_BGRA4444: 3079 case DRM_FORMAT_XRGB1555: 3080 case DRM_FORMAT_XBGR1555: 3081 case DRM_FORMAT_RGBX5551: 3082 case DRM_FORMAT_BGRX5551: 3083 case DRM_FORMAT_ARGB1555: 3084 case DRM_FORMAT_ABGR1555: 3085 case DRM_FORMAT_RGBA5551: 3086 case DRM_FORMAT_BGRA5551: 3087 case DRM_FORMAT_RGB565: 3088 case DRM_FORMAT_BGR565: 3089 case DRM_FORMAT_RGB888: 3090 case DRM_FORMAT_BGR888: 3091 case DRM_FORMAT_XRGB8888: 3092 case DRM_FORMAT_XBGR8888: 3093 case DRM_FORMAT_RGBX8888: 3094 case DRM_FORMAT_BGRX8888: 3095 case DRM_FORMAT_ARGB8888: 3096 case DRM_FORMAT_ABGR8888: 3097 case DRM_FORMAT_RGBA8888: 3098 case DRM_FORMAT_BGRA8888: 3099 case DRM_FORMAT_XRGB2101010: 3100 case DRM_FORMAT_XBGR2101010: 3101 case DRM_FORMAT_RGBX1010102: 3102 case DRM_FORMAT_BGRX1010102: 3103 case DRM_FORMAT_ARGB2101010: 3104 case DRM_FORMAT_ABGR2101010: 3105 case DRM_FORMAT_RGBA1010102: 3106 case DRM_FORMAT_BGRA1010102: 3107 case DRM_FORMAT_YUYV: 3108 case DRM_FORMAT_YVYU: 3109 case DRM_FORMAT_UYVY: 3110 case DRM_FORMAT_VYUY: 3111 case DRM_FORMAT_AYUV: 3112 case DRM_FORMAT_NV12: 3113 case DRM_FORMAT_NV21: 3114 case DRM_FORMAT_NV16: 3115 case DRM_FORMAT_NV61: 3116 case DRM_FORMAT_NV24: 3117 case DRM_FORMAT_NV42: 3118 case DRM_FORMAT_YUV410: 3119 case DRM_FORMAT_YVU410: 3120 case DRM_FORMAT_YUV411: 3121 case DRM_FORMAT_YVU411: 3122 case DRM_FORMAT_YUV420: 3123 case DRM_FORMAT_YVU420: 3124 case DRM_FORMAT_YUV422: 3125 case DRM_FORMAT_YVU422: 3126 case DRM_FORMAT_YUV444: 3127 case DRM_FORMAT_YVU444: 3128 return 0; 3129 default: 3130 DRM_DEBUG_KMS("invalid pixel format %s\n", 3131 drm_get_format_name(r->pixel_format)); 3132 return -EINVAL; 3133 } 3134 } 3135 3136 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3137 { 3138 int ret, hsub, vsub, num_planes, i; 3139 3140 ret = format_check(r); 3141 if (ret) { 3142 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3143 drm_get_format_name(r->pixel_format)); 3144 return ret; 3145 } 3146 3147 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3148 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3149 num_planes = drm_format_num_planes(r->pixel_format); 3150 3151 if (r->width == 0 || r->width % hsub) { 3152 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3153 return -EINVAL; 3154 } 3155 3156 if (r->height == 0 || r->height % vsub) { 3157 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3158 return -EINVAL; 3159 } 3160 3161 for (i = 0; i < num_planes; i++) { 3162 unsigned int width = r->width / (i != 0 ? hsub : 1); 3163 unsigned int height = r->height / (i != 0 ? vsub : 1); 3164 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3165 3166 if (!r->handles[i]) { 3167 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3168 return -EINVAL; 3169 } 3170 3171 if ((uint64_t) width * cpp > UINT_MAX) 3172 return -ERANGE; 3173 3174 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3175 return -ERANGE; 3176 3177 if (r->pitches[i] < width * cpp) { 3178 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3179 return -EINVAL; 3180 } 3181 3182 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { 3183 DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n", 3184 r->modifier[i], i); 3185 return -EINVAL; 3186 } 3187 3188 /* modifier specific checks: */ 3189 switch (r->modifier[i]) { 3190 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: 3191 /* NOTE: the pitch restriction may be lifted later if it turns 3192 * out that no hw has this restriction: 3193 */ 3194 if (r->pixel_format != DRM_FORMAT_NV12 || 3195 width % 128 || height % 32 || 3196 r->pitches[i] % 128) { 3197 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i); 3198 return -EINVAL; 3199 } 3200 break; 3201 3202 default: 3203 break; 3204 } 3205 } 3206 3207 for (i = num_planes; i < 4; i++) { 3208 if (r->modifier[i]) { 3209 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i); 3210 return -EINVAL; 3211 } 3212 3213 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ 3214 if (!(r->flags & DRM_MODE_FB_MODIFIERS)) 3215 continue; 3216 3217 if (r->handles[i]) { 3218 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i); 3219 return -EINVAL; 3220 } 3221 3222 if (r->pitches[i]) { 3223 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i); 3224 return -EINVAL; 3225 } 3226 3227 if (r->offsets[i]) { 3228 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i); 3229 return -EINVAL; 3230 } 3231 } 3232 3233 return 0; 3234 } 3235 3236 static struct drm_framebuffer * 3237 internal_framebuffer_create(struct drm_device *dev, 3238 struct drm_mode_fb_cmd2 *r, 3239 struct drm_file *file_priv) 3240 { 3241 struct drm_mode_config *config = &dev->mode_config; 3242 struct drm_framebuffer *fb; 3243 int ret; 3244 3245 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { 3246 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3247 return ERR_PTR(-EINVAL); 3248 } 3249 3250 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3251 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3252 r->width, config->min_width, config->max_width); 3253 return ERR_PTR(-EINVAL); 3254 } 3255 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3256 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3257 r->height, config->min_height, config->max_height); 3258 return ERR_PTR(-EINVAL); 3259 } 3260 3261 if (r->flags & DRM_MODE_FB_MODIFIERS && 3262 !dev->mode_config.allow_fb_modifiers) { 3263 DRM_DEBUG_KMS("driver does not support fb modifiers\n"); 3264 return ERR_PTR(-EINVAL); 3265 } 3266 3267 ret = framebuffer_check(r); 3268 if (ret) 3269 return ERR_PTR(ret); 3270 3271 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3272 if (IS_ERR(fb)) { 3273 DRM_DEBUG_KMS("could not create framebuffer\n"); 3274 return fb; 3275 } 3276 3277 return fb; 3278 } 3279 3280 /** 3281 * drm_mode_addfb2 - add an FB to the graphics configuration 3282 * @dev: drm device for the ioctl 3283 * @data: data pointer for the ioctl 3284 * @file_priv: drm file for the ioctl call 3285 * 3286 * Add a new FB to the specified CRTC, given a user request with format. This is 3287 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3288 * and uses fourcc codes as pixel format specifiers. 3289 * 3290 * Called by the user via ioctl. 3291 * 3292 * Returns: 3293 * Zero on success, negative errno on failure. 3294 */ 3295 int drm_mode_addfb2(struct drm_device *dev, 3296 void *data, struct drm_file *file_priv) 3297 { 3298 struct drm_mode_fb_cmd2 *r = data; 3299 struct drm_framebuffer *fb; 3300 3301 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3302 return -EINVAL; 3303 3304 fb = internal_framebuffer_create(dev, r, file_priv); 3305 if (IS_ERR(fb)) 3306 return PTR_ERR(fb); 3307 3308 /* Transfer ownership to the filp for reaping on close */ 3309 3310 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3311 mutex_lock(&file_priv->fbs_lock); 3312 r->fb_id = fb->base.id; 3313 list_add(&fb->filp_head, &file_priv->fbs); 3314 mutex_unlock(&file_priv->fbs_lock); 3315 3316 return 0; 3317 } 3318 3319 /** 3320 * drm_mode_rmfb - remove an FB from the 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 * Remove the FB specified by the user. 3326 * 3327 * Called by the user via ioctl. 3328 * 3329 * Returns: 3330 * Zero on success, negative errno on failure. 3331 */ 3332 int drm_mode_rmfb(struct drm_device *dev, 3333 void *data, struct drm_file *file_priv) 3334 { 3335 struct drm_framebuffer *fb = NULL; 3336 struct drm_framebuffer *fbl = NULL; 3337 uint32_t *id = data; 3338 int found = 0; 3339 3340 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3341 return -EINVAL; 3342 3343 mutex_lock(&file_priv->fbs_lock); 3344 mutex_lock(&dev->mode_config.fb_lock); 3345 fb = __drm_framebuffer_lookup(dev, *id); 3346 if (!fb) 3347 goto fail_lookup; 3348 3349 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3350 if (fb == fbl) 3351 found = 1; 3352 if (!found) 3353 goto fail_lookup; 3354 3355 list_del_init(&fb->filp_head); 3356 mutex_unlock(&dev->mode_config.fb_lock); 3357 mutex_unlock(&file_priv->fbs_lock); 3358 3359 drm_framebuffer_unreference(fb); 3360 3361 return 0; 3362 3363 fail_lookup: 3364 mutex_unlock(&dev->mode_config.fb_lock); 3365 mutex_unlock(&file_priv->fbs_lock); 3366 3367 return -ENOENT; 3368 } 3369 3370 /** 3371 * drm_mode_getfb - get FB info 3372 * @dev: drm device for the ioctl 3373 * @data: data pointer for the ioctl 3374 * @file_priv: drm file for the ioctl call 3375 * 3376 * Lookup the FB given its ID and return info about it. 3377 * 3378 * Called by the user via ioctl. 3379 * 3380 * Returns: 3381 * Zero on success, negative errno on failure. 3382 */ 3383 int drm_mode_getfb(struct drm_device *dev, 3384 void *data, struct drm_file *file_priv) 3385 { 3386 struct drm_mode_fb_cmd *r = data; 3387 struct drm_framebuffer *fb; 3388 int ret; 3389 3390 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3391 return -EINVAL; 3392 3393 fb = drm_framebuffer_lookup(dev, r->fb_id); 3394 if (!fb) 3395 return -ENOENT; 3396 3397 r->height = fb->height; 3398 r->width = fb->width; 3399 r->depth = fb->depth; 3400 r->bpp = fb->bits_per_pixel; 3401 r->pitch = fb->pitches[0]; 3402 if (fb->funcs->create_handle) { 3403 if (file_priv->is_master || capable(CAP_SYS_ADMIN) || 3404 drm_is_control_client(file_priv)) { 3405 ret = fb->funcs->create_handle(fb, file_priv, 3406 &r->handle); 3407 } else { 3408 /* GET_FB() is an unprivileged ioctl so we must not 3409 * return a buffer-handle to non-master processes! For 3410 * backwards-compatibility reasons, we cannot make 3411 * GET_FB() privileged, so just return an invalid handle 3412 * for non-masters. */ 3413 r->handle = 0; 3414 ret = 0; 3415 } 3416 } else { 3417 ret = -ENODEV; 3418 } 3419 3420 drm_framebuffer_unreference(fb); 3421 3422 return ret; 3423 } 3424 3425 /** 3426 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3427 * @dev: drm device for the ioctl 3428 * @data: data pointer for the ioctl 3429 * @file_priv: drm file for the ioctl call 3430 * 3431 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3432 * rectangle list. Generic userspace which does frontbuffer rendering must call 3433 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3434 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3435 * 3436 * Modesetting drivers which always update the frontbuffer do not need to 3437 * implement the corresponding ->dirty framebuffer callback. 3438 * 3439 * Called by the user via ioctl. 3440 * 3441 * Returns: 3442 * Zero on success, negative errno on failure. 3443 */ 3444 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3445 void *data, struct drm_file *file_priv) 3446 { 3447 struct drm_clip_rect __user *clips_ptr; 3448 struct drm_clip_rect *clips = NULL; 3449 struct drm_mode_fb_dirty_cmd *r = data; 3450 struct drm_framebuffer *fb; 3451 unsigned flags; 3452 int num_clips; 3453 int ret; 3454 3455 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3456 return -EINVAL; 3457 3458 fb = drm_framebuffer_lookup(dev, r->fb_id); 3459 if (!fb) 3460 return -ENOENT; 3461 3462 num_clips = r->num_clips; 3463 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3464 3465 if (!num_clips != !clips_ptr) { 3466 ret = -EINVAL; 3467 goto out_err1; 3468 } 3469 3470 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3471 3472 /* If userspace annotates copy, clips must come in pairs */ 3473 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3474 ret = -EINVAL; 3475 goto out_err1; 3476 } 3477 3478 if (num_clips && clips_ptr) { 3479 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3480 ret = -EINVAL; 3481 goto out_err1; 3482 } 3483 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); 3484 if (!clips) { 3485 ret = -ENOMEM; 3486 goto out_err1; 3487 } 3488 3489 ret = copy_from_user(clips, clips_ptr, 3490 num_clips * sizeof(*clips)); 3491 if (ret) { 3492 ret = -EFAULT; 3493 goto out_err2; 3494 } 3495 } 3496 3497 if (fb->funcs->dirty) { 3498 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3499 clips, num_clips); 3500 } else { 3501 ret = -ENOSYS; 3502 } 3503 3504 out_err2: 3505 kfree(clips); 3506 out_err1: 3507 drm_framebuffer_unreference(fb); 3508 3509 return ret; 3510 } 3511 3512 3513 /** 3514 * drm_fb_release - remove and free the FBs on this file 3515 * @priv: drm file for the ioctl 3516 * 3517 * Destroy all the FBs associated with @filp. 3518 * 3519 * Called by the user via ioctl. 3520 * 3521 * Returns: 3522 * Zero on success, negative errno on failure. 3523 */ 3524 void drm_fb_release(struct drm_file *priv) 3525 { 3526 struct drm_framebuffer *fb, *tfb; 3527 3528 /* 3529 * When the file gets released that means no one else can access the fb 3530 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3531 * avoid upsetting lockdep since the universal cursor code adds a 3532 * framebuffer while holding mutex locks. 3533 * 3534 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3535 * locks is impossible here since no one else but this function can get 3536 * at it any more. 3537 */ 3538 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3539 list_del_init(&fb->filp_head); 3540 3541 /* This drops the fpriv->fbs reference. */ 3542 drm_framebuffer_unreference(fb); 3543 } 3544 } 3545 3546 /** 3547 * drm_property_create - create a new property type 3548 * @dev: drm device 3549 * @flags: flags specifying the property type 3550 * @name: name of the property 3551 * @num_values: number of pre-defined values 3552 * 3553 * This creates a new generic drm property which can then be attached to a drm 3554 * object with drm_object_attach_property. The returned property object must be 3555 * freed with drm_property_destroy. 3556 * 3557 * Note that the DRM core keeps a per-device list of properties and that, if 3558 * drm_mode_config_cleanup() is called, it will destroy all properties created 3559 * by the driver. 3560 * 3561 * Returns: 3562 * A pointer to the newly created property on success, NULL on failure. 3563 */ 3564 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3565 const char *name, int num_values) 3566 { 3567 struct drm_property *property = NULL; 3568 int ret; 3569 3570 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3571 if (!property) 3572 return NULL; 3573 3574 property->dev = dev; 3575 3576 if (num_values) { 3577 property->values = kcalloc(num_values, sizeof(uint64_t), 3578 GFP_KERNEL); 3579 if (!property->values) 3580 goto fail; 3581 } 3582 3583 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3584 if (ret) 3585 goto fail; 3586 3587 property->flags = flags; 3588 property->num_values = num_values; 3589 INIT_LIST_HEAD(&property->enum_list); 3590 3591 if (name) { 3592 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3593 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3594 } 3595 3596 list_add_tail(&property->head, &dev->mode_config.property_list); 3597 3598 WARN_ON(!drm_property_type_valid(property)); 3599 3600 return property; 3601 fail: 3602 kfree(property->values); 3603 kfree(property); 3604 return NULL; 3605 } 3606 EXPORT_SYMBOL(drm_property_create); 3607 3608 /** 3609 * drm_property_create_enum - create a new enumeration property type 3610 * @dev: drm device 3611 * @flags: flags specifying the property type 3612 * @name: name of the property 3613 * @props: enumeration lists with property values 3614 * @num_values: number of pre-defined values 3615 * 3616 * This creates a new generic drm property which can then be attached to a drm 3617 * object with drm_object_attach_property. The returned property object must be 3618 * freed with drm_property_destroy. 3619 * 3620 * Userspace is only allowed to set one of the predefined values for enumeration 3621 * properties. 3622 * 3623 * Returns: 3624 * A pointer to the newly created property on success, NULL on failure. 3625 */ 3626 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3627 const char *name, 3628 const struct drm_prop_enum_list *props, 3629 int num_values) 3630 { 3631 struct drm_property *property; 3632 int i, ret; 3633 3634 flags |= DRM_MODE_PROP_ENUM; 3635 3636 property = drm_property_create(dev, flags, name, num_values); 3637 if (!property) 3638 return NULL; 3639 3640 for (i = 0; i < num_values; i++) { 3641 ret = drm_property_add_enum(property, i, 3642 props[i].type, 3643 props[i].name); 3644 if (ret) { 3645 drm_property_destroy(dev, property); 3646 return NULL; 3647 } 3648 } 3649 3650 return property; 3651 } 3652 EXPORT_SYMBOL(drm_property_create_enum); 3653 3654 /** 3655 * drm_property_create_bitmask - create a new bitmask property type 3656 * @dev: drm device 3657 * @flags: flags specifying the property type 3658 * @name: name of the property 3659 * @props: enumeration lists with property bitflags 3660 * @num_props: size of the @props array 3661 * @supported_bits: bitmask of all supported enumeration values 3662 * 3663 * This creates a new bitmask drm property which can then be attached to a drm 3664 * object with drm_object_attach_property. The returned property object must be 3665 * freed with drm_property_destroy. 3666 * 3667 * Compared to plain enumeration properties userspace is allowed to set any 3668 * or'ed together combination of the predefined property bitflag values 3669 * 3670 * Returns: 3671 * A pointer to the newly created property on success, NULL on failure. 3672 */ 3673 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3674 int flags, const char *name, 3675 const struct drm_prop_enum_list *props, 3676 int num_props, 3677 uint64_t supported_bits) 3678 { 3679 struct drm_property *property; 3680 int i, ret, index = 0; 3681 int num_values = hweight64(supported_bits); 3682 3683 flags |= DRM_MODE_PROP_BITMASK; 3684 3685 property = drm_property_create(dev, flags, name, num_values); 3686 if (!property) 3687 return NULL; 3688 for (i = 0; i < num_props; i++) { 3689 if (!(supported_bits & (1ULL << props[i].type))) 3690 continue; 3691 3692 if (WARN_ON(index >= num_values)) { 3693 drm_property_destroy(dev, property); 3694 return NULL; 3695 } 3696 3697 ret = drm_property_add_enum(property, index++, 3698 props[i].type, 3699 props[i].name); 3700 if (ret) { 3701 drm_property_destroy(dev, property); 3702 return NULL; 3703 } 3704 } 3705 3706 return property; 3707 } 3708 EXPORT_SYMBOL(drm_property_create_bitmask); 3709 3710 static struct drm_property *property_create_range(struct drm_device *dev, 3711 int flags, const char *name, 3712 uint64_t min, uint64_t max) 3713 { 3714 struct drm_property *property; 3715 3716 property = drm_property_create(dev, flags, name, 2); 3717 if (!property) 3718 return NULL; 3719 3720 property->values[0] = min; 3721 property->values[1] = max; 3722 3723 return property; 3724 } 3725 3726 /** 3727 * drm_property_create_range - create a new unsigned ranged property type 3728 * @dev: drm device 3729 * @flags: flags specifying the property type 3730 * @name: name of the property 3731 * @min: minimum value of the property 3732 * @max: maximum value of the property 3733 * 3734 * This creates a new generic drm property which can then be attached to a drm 3735 * object with drm_object_attach_property. The returned property object must be 3736 * freed with drm_property_destroy. 3737 * 3738 * Userspace is allowed to set any unsigned integer value in the (min, max) 3739 * range inclusive. 3740 * 3741 * Returns: 3742 * A pointer to the newly created property on success, NULL on failure. 3743 */ 3744 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3745 const char *name, 3746 uint64_t min, uint64_t max) 3747 { 3748 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3749 name, min, max); 3750 } 3751 EXPORT_SYMBOL(drm_property_create_range); 3752 3753 /** 3754 * drm_property_create_signed_range - create a new signed 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 signed 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_signed_range(struct drm_device *dev, 3772 int flags, const char *name, 3773 int64_t min, int64_t max) 3774 { 3775 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3776 name, I642U64(min), I642U64(max)); 3777 } 3778 EXPORT_SYMBOL(drm_property_create_signed_range); 3779 3780 /** 3781 * drm_property_create_object - create a new object property type 3782 * @dev: drm device 3783 * @flags: flags specifying the property type 3784 * @name: name of the property 3785 * @type: object type from DRM_MODE_OBJECT_* defines 3786 * 3787 * This creates a new generic drm property which can then be attached to a drm 3788 * object with drm_object_attach_property. The returned property object must be 3789 * freed with drm_property_destroy. 3790 * 3791 * Userspace is only allowed to set this to any property value of the given 3792 * @type. Only useful for atomic properties, which is enforced. 3793 * 3794 * Returns: 3795 * A pointer to the newly created property on success, NULL on failure. 3796 */ 3797 struct drm_property *drm_property_create_object(struct drm_device *dev, 3798 int flags, const char *name, uint32_t type) 3799 { 3800 struct drm_property *property; 3801 3802 flags |= DRM_MODE_PROP_OBJECT; 3803 3804 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) 3805 return NULL; 3806 3807 property = drm_property_create(dev, flags, name, 1); 3808 if (!property) 3809 return NULL; 3810 3811 property->values[0] = type; 3812 3813 return property; 3814 } 3815 EXPORT_SYMBOL(drm_property_create_object); 3816 3817 /** 3818 * drm_property_create_bool - create a new boolean property type 3819 * @dev: drm device 3820 * @flags: flags specifying the property type 3821 * @name: name of the property 3822 * 3823 * This creates a new generic drm property which can then be attached to a drm 3824 * object with drm_object_attach_property. The returned property object must be 3825 * freed with drm_property_destroy. 3826 * 3827 * This is implemented as a ranged property with only {0, 1} as valid values. 3828 * 3829 * Returns: 3830 * A pointer to the newly created property on success, NULL on failure. 3831 */ 3832 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, 3833 const char *name) 3834 { 3835 return drm_property_create_range(dev, flags, name, 0, 1); 3836 } 3837 EXPORT_SYMBOL(drm_property_create_bool); 3838 3839 /** 3840 * drm_property_add_enum - add a possible value to an enumeration property 3841 * @property: enumeration property to change 3842 * @index: index of the new enumeration 3843 * @value: value of the new enumeration 3844 * @name: symbolic name of the new enumeration 3845 * 3846 * This functions adds enumerations to a property. 3847 * 3848 * It's use is deprecated, drivers should use one of the more specific helpers 3849 * to directly create the property with all enumerations already attached. 3850 * 3851 * Returns: 3852 * Zero on success, error code on failure. 3853 */ 3854 int drm_property_add_enum(struct drm_property *property, int index, 3855 uint64_t value, const char *name) 3856 { 3857 struct drm_property_enum *prop_enum; 3858 3859 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3860 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3861 return -EINVAL; 3862 3863 /* 3864 * Bitmask enum properties have the additional constraint of values 3865 * from 0 to 63 3866 */ 3867 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3868 (value > 63)) 3869 return -EINVAL; 3870 3871 if (!list_empty(&property->enum_list)) { 3872 list_for_each_entry(prop_enum, &property->enum_list, head) { 3873 if (prop_enum->value == value) { 3874 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3875 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3876 return 0; 3877 } 3878 } 3879 } 3880 3881 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3882 if (!prop_enum) 3883 return -ENOMEM; 3884 3885 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3886 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3887 prop_enum->value = value; 3888 3889 property->values[index] = value; 3890 list_add_tail(&prop_enum->head, &property->enum_list); 3891 return 0; 3892 } 3893 EXPORT_SYMBOL(drm_property_add_enum); 3894 3895 /** 3896 * drm_property_destroy - destroy a drm property 3897 * @dev: drm device 3898 * @property: property to destry 3899 * 3900 * This function frees a property including any attached resources like 3901 * enumeration values. 3902 */ 3903 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 3904 { 3905 struct drm_property_enum *prop_enum, *pt; 3906 3907 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 3908 list_del(&prop_enum->head); 3909 kfree(prop_enum); 3910 } 3911 3912 if (property->num_values) 3913 kfree(property->values); 3914 drm_mode_object_put(dev, &property->base); 3915 list_del(&property->head); 3916 kfree(property); 3917 } 3918 EXPORT_SYMBOL(drm_property_destroy); 3919 3920 /** 3921 * drm_object_attach_property - attach a property to a modeset object 3922 * @obj: drm modeset object 3923 * @property: property to attach 3924 * @init_val: initial value of the property 3925 * 3926 * This attaches the given property to the modeset object with the given initial 3927 * value. Currently this function cannot fail since the properties are stored in 3928 * a statically sized array. 3929 */ 3930 void drm_object_attach_property(struct drm_mode_object *obj, 3931 struct drm_property *property, 3932 uint64_t init_val) 3933 { 3934 int count = obj->properties->count; 3935 3936 if (count == DRM_OBJECT_MAX_PROPERTY) { 3937 WARN(1, "Failed to attach object property (type: 0x%x). Please " 3938 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 3939 "you see this message on the same object type.\n", 3940 obj->type); 3941 return; 3942 } 3943 3944 obj->properties->properties[count] = property; 3945 obj->properties->values[count] = init_val; 3946 obj->properties->count++; 3947 if (property->flags & DRM_MODE_PROP_ATOMIC) 3948 obj->properties->atomic_count++; 3949 } 3950 EXPORT_SYMBOL(drm_object_attach_property); 3951 3952 /** 3953 * drm_object_property_set_value - set the value of a property 3954 * @obj: drm mode object to set property value for 3955 * @property: property to set 3956 * @val: value the property should be set to 3957 * 3958 * This functions sets a given property on a given object. This function only 3959 * changes the software state of the property, it does not call into the 3960 * driver's ->set_property callback. 3961 * 3962 * Returns: 3963 * Zero on success, error code on failure. 3964 */ 3965 int drm_object_property_set_value(struct drm_mode_object *obj, 3966 struct drm_property *property, uint64_t val) 3967 { 3968 int i; 3969 3970 for (i = 0; i < obj->properties->count; i++) { 3971 if (obj->properties->properties[i] == property) { 3972 obj->properties->values[i] = val; 3973 return 0; 3974 } 3975 } 3976 3977 return -EINVAL; 3978 } 3979 EXPORT_SYMBOL(drm_object_property_set_value); 3980 3981 /** 3982 * drm_object_property_get_value - retrieve the value of a property 3983 * @obj: drm mode object to get property value from 3984 * @property: property to retrieve 3985 * @val: storage for the property value 3986 * 3987 * This function retrieves the softare state of the given property for the given 3988 * property. Since there is no driver callback to retrieve the current property 3989 * value this might be out of sync with the hardware, depending upon the driver 3990 * and property. 3991 * 3992 * Returns: 3993 * Zero on success, error code on failure. 3994 */ 3995 int drm_object_property_get_value(struct drm_mode_object *obj, 3996 struct drm_property *property, uint64_t *val) 3997 { 3998 int i; 3999 4000 /* read-only properties bypass atomic mechanism and still store 4001 * their value in obj->properties->values[].. mostly to avoid 4002 * having to deal w/ EDID and similar props in atomic paths: 4003 */ 4004 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && 4005 !(property->flags & DRM_MODE_PROP_IMMUTABLE)) 4006 return drm_atomic_get_property(obj, property, val); 4007 4008 for (i = 0; i < obj->properties->count; i++) { 4009 if (obj->properties->properties[i] == property) { 4010 *val = obj->properties->values[i]; 4011 return 0; 4012 } 4013 } 4014 4015 return -EINVAL; 4016 } 4017 EXPORT_SYMBOL(drm_object_property_get_value); 4018 4019 /** 4020 * drm_mode_getproperty_ioctl - get the property metadata 4021 * @dev: DRM device 4022 * @data: ioctl data 4023 * @file_priv: DRM file info 4024 * 4025 * This function retrieves the metadata for a given property, like the different 4026 * possible values for an enum property or the limits for a range property. 4027 * 4028 * Blob properties are special 4029 * 4030 * Called by the user via ioctl. 4031 * 4032 * Returns: 4033 * Zero on success, negative errno on failure. 4034 */ 4035 int drm_mode_getproperty_ioctl(struct drm_device *dev, 4036 void *data, struct drm_file *file_priv) 4037 { 4038 struct drm_mode_get_property *out_resp = data; 4039 struct drm_property *property; 4040 int enum_count = 0; 4041 int value_count = 0; 4042 int ret = 0, i; 4043 int copied; 4044 struct drm_property_enum *prop_enum; 4045 struct drm_mode_property_enum __user *enum_ptr; 4046 uint64_t __user *values_ptr; 4047 4048 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4049 return -EINVAL; 4050 4051 drm_modeset_lock_all(dev); 4052 property = drm_property_find(dev, out_resp->prop_id); 4053 if (!property) { 4054 ret = -ENOENT; 4055 goto done; 4056 } 4057 4058 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4059 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4060 list_for_each_entry(prop_enum, &property->enum_list, head) 4061 enum_count++; 4062 } 4063 4064 value_count = property->num_values; 4065 4066 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 4067 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 4068 out_resp->flags = property->flags; 4069 4070 if ((out_resp->count_values >= value_count) && value_count) { 4071 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 4072 for (i = 0; i < value_count; i++) { 4073 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 4074 ret = -EFAULT; 4075 goto done; 4076 } 4077 } 4078 } 4079 out_resp->count_values = value_count; 4080 4081 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4082 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4083 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 4084 copied = 0; 4085 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 4086 list_for_each_entry(prop_enum, &property->enum_list, head) { 4087 4088 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 4089 ret = -EFAULT; 4090 goto done; 4091 } 4092 4093 if (copy_to_user(&enum_ptr[copied].name, 4094 &prop_enum->name, DRM_PROP_NAME_LEN)) { 4095 ret = -EFAULT; 4096 goto done; 4097 } 4098 copied++; 4099 } 4100 } 4101 out_resp->count_enum_blobs = enum_count; 4102 } 4103 4104 /* 4105 * NOTE: The idea seems to have been to use this to read all the blob 4106 * property values. But nothing ever added them to the corresponding 4107 * list, userspace always used the special-purpose get_blob ioctl to 4108 * read the value for a blob property. It also doesn't make a lot of 4109 * sense to return values here when everything else is just metadata for 4110 * the property itself. 4111 */ 4112 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4113 out_resp->count_enum_blobs = 0; 4114 done: 4115 drm_modeset_unlock_all(dev); 4116 return ret; 4117 } 4118 4119 /** 4120 * drm_property_create_blob - Create new blob property 4121 * 4122 * Creates a new blob property for a specified DRM device, optionally 4123 * copying data. 4124 * 4125 * @dev: DRM device to create property for 4126 * @length: Length to allocate for blob data 4127 * @data: If specified, copies data into blob 4128 * 4129 * Returns: 4130 * New blob property with a single reference on success, or an ERR_PTR 4131 * value on failure. 4132 */ 4133 struct drm_property_blob * 4134 drm_property_create_blob(struct drm_device *dev, size_t length, 4135 const void *data) 4136 { 4137 struct drm_property_blob *blob; 4138 int ret; 4139 4140 if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob)) 4141 return ERR_PTR(-EINVAL); 4142 4143 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4144 if (!blob) 4145 return ERR_PTR(-ENOMEM); 4146 4147 /* This must be explicitly initialised, so we can safely call list_del 4148 * on it in the removal handler, even if it isn't in a file list. */ 4149 INIT_LIST_HEAD(&blob->head_file); 4150 blob->length = length; 4151 blob->dev = dev; 4152 4153 if (data) 4154 memcpy(blob->data, data, length); 4155 4156 mutex_lock(&dev->mode_config.blob_lock); 4157 4158 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 4159 if (ret) { 4160 kfree(blob); 4161 mutex_unlock(&dev->mode_config.blob_lock); 4162 return ERR_PTR(-EINVAL); 4163 } 4164 4165 kref_init(&blob->refcount); 4166 4167 list_add_tail(&blob->head_global, 4168 &dev->mode_config.property_blob_list); 4169 4170 mutex_unlock(&dev->mode_config.blob_lock); 4171 4172 return blob; 4173 } 4174 EXPORT_SYMBOL(drm_property_create_blob); 4175 4176 /** 4177 * drm_property_free_blob - Blob property destructor 4178 * 4179 * Internal free function for blob properties; must not be used directly. 4180 * 4181 * @kref: Reference 4182 */ 4183 static void drm_property_free_blob(struct kref *kref) 4184 { 4185 struct drm_property_blob *blob = 4186 container_of(kref, struct drm_property_blob, refcount); 4187 4188 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock)); 4189 4190 list_del(&blob->head_global); 4191 list_del(&blob->head_file); 4192 drm_mode_object_put(blob->dev, &blob->base); 4193 4194 kfree(blob); 4195 } 4196 4197 /** 4198 * drm_property_unreference_blob - Unreference a blob property 4199 * 4200 * Drop a reference on a blob property. May free the object. 4201 * 4202 * @blob: Pointer to blob property 4203 */ 4204 void drm_property_unreference_blob(struct drm_property_blob *blob) 4205 { 4206 struct drm_device *dev; 4207 4208 if (!blob) 4209 return; 4210 4211 dev = blob->dev; 4212 4213 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4214 4215 if (kref_put_mutex(&blob->refcount, drm_property_free_blob, 4216 &dev->mode_config.blob_lock)) 4217 mutex_unlock(&dev->mode_config.blob_lock); 4218 else 4219 might_lock(&dev->mode_config.blob_lock); 4220 } 4221 EXPORT_SYMBOL(drm_property_unreference_blob); 4222 4223 /** 4224 * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held 4225 * 4226 * Drop a reference on a blob property. May free the object. This must be 4227 * called with blob_lock held. 4228 * 4229 * @blob: Pointer to blob property 4230 */ 4231 static void drm_property_unreference_blob_locked(struct drm_property_blob *blob) 4232 { 4233 if (!blob) 4234 return; 4235 4236 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4237 4238 kref_put(&blob->refcount, drm_property_free_blob); 4239 } 4240 4241 /** 4242 * drm_property_destroy_user_blobs - destroy all blobs created by this client 4243 * @dev: DRM device 4244 * @file_priv: destroy all blobs owned by this file handle 4245 */ 4246 void drm_property_destroy_user_blobs(struct drm_device *dev, 4247 struct drm_file *file_priv) 4248 { 4249 struct drm_property_blob *blob, *bt; 4250 4251 mutex_lock(&dev->mode_config.blob_lock); 4252 4253 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) { 4254 list_del_init(&blob->head_file); 4255 drm_property_unreference_blob_locked(blob); 4256 } 4257 4258 mutex_unlock(&dev->mode_config.blob_lock); 4259 } 4260 4261 /** 4262 * drm_property_reference_blob - Take a reference on an existing property 4263 * 4264 * Take a new reference on an existing blob property. 4265 * 4266 * @blob: Pointer to blob property 4267 */ 4268 struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob) 4269 { 4270 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4271 kref_get(&blob->refcount); 4272 return blob; 4273 } 4274 EXPORT_SYMBOL(drm_property_reference_blob); 4275 4276 /* 4277 * Like drm_property_lookup_blob, but does not return an additional reference. 4278 * Must be called with blob_lock held. 4279 */ 4280 static struct drm_property_blob *__drm_property_lookup_blob(struct drm_device *dev, 4281 uint32_t id) 4282 { 4283 struct drm_mode_object *obj = NULL; 4284 struct drm_property_blob *blob; 4285 4286 WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock)); 4287 4288 mutex_lock(&dev->mode_config.idr_mutex); 4289 obj = idr_find(&dev->mode_config.crtc_idr, id); 4290 if (!obj || (obj->type != DRM_MODE_OBJECT_BLOB) || (obj->id != id)) 4291 blob = NULL; 4292 else 4293 blob = obj_to_blob(obj); 4294 mutex_unlock(&dev->mode_config.idr_mutex); 4295 4296 return blob; 4297 } 4298 4299 /** 4300 * drm_property_lookup_blob - look up a blob property and take a reference 4301 * @dev: drm device 4302 * @id: id of the blob property 4303 * 4304 * If successful, this takes an additional reference to the blob property. 4305 * callers need to make sure to eventually unreference the returned property 4306 * again, using @drm_property_unreference_blob. 4307 */ 4308 struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev, 4309 uint32_t id) 4310 { 4311 struct drm_property_blob *blob; 4312 4313 mutex_lock(&dev->mode_config.blob_lock); 4314 blob = __drm_property_lookup_blob(dev, id); 4315 if (blob) { 4316 if (!kref_get_unless_zero(&blob->refcount)) 4317 blob = NULL; 4318 } 4319 mutex_unlock(&dev->mode_config.blob_lock); 4320 4321 return blob; 4322 } 4323 EXPORT_SYMBOL(drm_property_lookup_blob); 4324 4325 /** 4326 * drm_property_replace_global_blob - atomically replace existing blob property 4327 * @dev: drm device 4328 * @replace: location of blob property pointer to be replaced 4329 * @length: length of data for new blob, or 0 for no data 4330 * @data: content for new blob, or NULL for no data 4331 * @obj_holds_id: optional object for property holding blob ID 4332 * @prop_holds_id: optional property holding blob ID 4333 * @return 0 on success or error on failure 4334 * 4335 * This function will atomically replace a global property in the blob list, 4336 * optionally updating a property which holds the ID of that property. It is 4337 * guaranteed to be atomic: no caller will be allowed to see intermediate 4338 * results, and either the entire operation will succeed and clean up the 4339 * previous property, or it will fail and the state will be unchanged. 4340 * 4341 * If length is 0 or data is NULL, no new blob will be created, and the holding 4342 * property, if specified, will be set to 0. 4343 * 4344 * Access to the replace pointer is assumed to be protected by the caller, e.g. 4345 * by holding the relevant modesetting object lock for its parent. 4346 * 4347 * For example, a drm_connector has a 'PATH' property, which contains the ID 4348 * of a blob property with the value of the MST path information. Calling this 4349 * function with replace pointing to the connector's path_blob_ptr, length and 4350 * data set for the new path information, obj_holds_id set to the connector's 4351 * base object, and prop_holds_id set to the path property name, will perform 4352 * a completely atomic update. The access to path_blob_ptr is protected by the 4353 * caller holding a lock on the connector. 4354 */ 4355 static int drm_property_replace_global_blob(struct drm_device *dev, 4356 struct drm_property_blob **replace, 4357 size_t length, 4358 const void *data, 4359 struct drm_mode_object *obj_holds_id, 4360 struct drm_property *prop_holds_id) 4361 { 4362 struct drm_property_blob *new_blob = NULL; 4363 struct drm_property_blob *old_blob = NULL; 4364 int ret; 4365 4366 WARN_ON(replace == NULL); 4367 4368 old_blob = *replace; 4369 4370 if (length && data) { 4371 new_blob = drm_property_create_blob(dev, length, data); 4372 if (IS_ERR(new_blob)) 4373 return PTR_ERR(new_blob); 4374 } 4375 4376 /* This does not need to be synchronised with blob_lock, as the 4377 * get_properties ioctl locks all modesetting objects, and 4378 * obj_holds_id must be locked before calling here, so we cannot 4379 * have its value out of sync with the list membership modified 4380 * below under blob_lock. */ 4381 if (obj_holds_id) { 4382 ret = drm_object_property_set_value(obj_holds_id, 4383 prop_holds_id, 4384 new_blob ? 4385 new_blob->base.id : 0); 4386 if (ret != 0) 4387 goto err_created; 4388 } 4389 4390 drm_property_unreference_blob(old_blob); 4391 *replace = new_blob; 4392 4393 return 0; 4394 4395 err_created: 4396 drm_property_unreference_blob(new_blob); 4397 return ret; 4398 } 4399 4400 /** 4401 * drm_mode_getblob_ioctl - get the contents of a blob property value 4402 * @dev: DRM device 4403 * @data: ioctl data 4404 * @file_priv: DRM file info 4405 * 4406 * This function retrieves the contents of a blob property. The value stored in 4407 * an object's blob property is just a normal modeset object id. 4408 * 4409 * Called by the user via ioctl. 4410 * 4411 * Returns: 4412 * Zero on success, negative errno on failure. 4413 */ 4414 int drm_mode_getblob_ioctl(struct drm_device *dev, 4415 void *data, struct drm_file *file_priv) 4416 { 4417 struct drm_mode_get_blob *out_resp = data; 4418 struct drm_property_blob *blob; 4419 int ret = 0; 4420 void __user *blob_ptr; 4421 4422 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4423 return -EINVAL; 4424 4425 drm_modeset_lock_all(dev); 4426 mutex_lock(&dev->mode_config.blob_lock); 4427 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4428 if (!blob) { 4429 ret = -ENOENT; 4430 goto done; 4431 } 4432 4433 if (out_resp->length == blob->length) { 4434 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4435 if (copy_to_user(blob_ptr, blob->data, blob->length)) { 4436 ret = -EFAULT; 4437 goto done; 4438 } 4439 } 4440 out_resp->length = blob->length; 4441 4442 done: 4443 mutex_unlock(&dev->mode_config.blob_lock); 4444 drm_modeset_unlock_all(dev); 4445 return ret; 4446 } 4447 4448 /** 4449 * drm_mode_createblob_ioctl - create a new blob property 4450 * @dev: DRM device 4451 * @data: ioctl data 4452 * @file_priv: DRM file info 4453 * 4454 * This function creates a new blob property with user-defined values. In order 4455 * to give us sensible validation and checking when creating, rather than at 4456 * every potential use, we also require a type to be provided upfront. 4457 * 4458 * Called by the user via ioctl. 4459 * 4460 * Returns: 4461 * Zero on success, negative errno on failure. 4462 */ 4463 int drm_mode_createblob_ioctl(struct drm_device *dev, 4464 void *data, struct drm_file *file_priv) 4465 { 4466 struct drm_mode_create_blob *out_resp = data; 4467 struct drm_property_blob *blob; 4468 void __user *blob_ptr; 4469 int ret = 0; 4470 4471 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4472 return -EINVAL; 4473 4474 blob = drm_property_create_blob(dev, out_resp->length, NULL); 4475 if (IS_ERR(blob)) 4476 return PTR_ERR(blob); 4477 4478 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4479 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) { 4480 ret = -EFAULT; 4481 goto out_blob; 4482 } 4483 4484 /* Dropping the lock between create_blob and our access here is safe 4485 * as only the same file_priv can remove the blob; at this point, it is 4486 * not associated with any file_priv. */ 4487 mutex_lock(&dev->mode_config.blob_lock); 4488 out_resp->blob_id = blob->base.id; 4489 list_add_tail(&blob->head_file, &file_priv->blobs); 4490 mutex_unlock(&dev->mode_config.blob_lock); 4491 4492 return 0; 4493 4494 out_blob: 4495 drm_property_unreference_blob(blob); 4496 return ret; 4497 } 4498 4499 /** 4500 * drm_mode_destroyblob_ioctl - destroy a user blob property 4501 * @dev: DRM device 4502 * @data: ioctl data 4503 * @file_priv: DRM file info 4504 * 4505 * Destroy an existing user-defined blob property. 4506 * 4507 * Called by the user via ioctl. 4508 * 4509 * Returns: 4510 * Zero on success, negative errno on failure. 4511 */ 4512 int drm_mode_destroyblob_ioctl(struct drm_device *dev, 4513 void *data, struct drm_file *file_priv) 4514 { 4515 struct drm_mode_destroy_blob *out_resp = data; 4516 struct drm_property_blob *blob = NULL, *bt; 4517 bool found = false; 4518 int ret = 0; 4519 4520 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4521 return -EINVAL; 4522 4523 mutex_lock(&dev->mode_config.blob_lock); 4524 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4525 if (!blob) { 4526 ret = -ENOENT; 4527 goto err; 4528 } 4529 4530 /* Ensure the property was actually created by this user. */ 4531 list_for_each_entry(bt, &file_priv->blobs, head_file) { 4532 if (bt == blob) { 4533 found = true; 4534 break; 4535 } 4536 } 4537 4538 if (!found) { 4539 ret = -EPERM; 4540 goto err; 4541 } 4542 4543 /* We must drop head_file here, because we may not be the last 4544 * reference on the blob. */ 4545 list_del_init(&blob->head_file); 4546 drm_property_unreference_blob_locked(blob); 4547 mutex_unlock(&dev->mode_config.blob_lock); 4548 4549 return 0; 4550 4551 err: 4552 mutex_unlock(&dev->mode_config.blob_lock); 4553 return ret; 4554 } 4555 4556 /** 4557 * drm_mode_connector_set_path_property - set tile property on connector 4558 * @connector: connector to set property on. 4559 * @path: path to use for property; must not be NULL. 4560 * 4561 * This creates a property to expose to userspace to specify a 4562 * connector path. This is mainly used for DisplayPort MST where 4563 * connectors have a topology and we want to allow userspace to give 4564 * them more meaningful names. 4565 * 4566 * Returns: 4567 * Zero on success, negative errno on failure. 4568 */ 4569 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4570 const char *path) 4571 { 4572 struct drm_device *dev = connector->dev; 4573 int ret; 4574 4575 ret = drm_property_replace_global_blob(dev, 4576 &connector->path_blob_ptr, 4577 strlen(path) + 1, 4578 path, 4579 &connector->base, 4580 dev->mode_config.path_property); 4581 return ret; 4582 } 4583 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4584 4585 /** 4586 * drm_mode_connector_set_tile_property - set tile property on connector 4587 * @connector: connector to set property on. 4588 * 4589 * This looks up the tile information for a connector, and creates a 4590 * property for userspace to parse if it exists. The property is of 4591 * the form of 8 integers using ':' as a separator. 4592 * 4593 * Returns: 4594 * Zero on success, errno on failure. 4595 */ 4596 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4597 { 4598 struct drm_device *dev = connector->dev; 4599 char tile[256]; 4600 int ret; 4601 4602 if (!connector->has_tile) { 4603 ret = drm_property_replace_global_blob(dev, 4604 &connector->tile_blob_ptr, 4605 0, 4606 NULL, 4607 &connector->base, 4608 dev->mode_config.tile_property); 4609 return ret; 4610 } 4611 4612 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4613 connector->tile_group->id, connector->tile_is_single_monitor, 4614 connector->num_h_tile, connector->num_v_tile, 4615 connector->tile_h_loc, connector->tile_v_loc, 4616 connector->tile_h_size, connector->tile_v_size); 4617 4618 ret = drm_property_replace_global_blob(dev, 4619 &connector->tile_blob_ptr, 4620 strlen(tile) + 1, 4621 tile, 4622 &connector->base, 4623 dev->mode_config.tile_property); 4624 return ret; 4625 } 4626 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4627 4628 /** 4629 * drm_mode_connector_update_edid_property - update the edid property of a connector 4630 * @connector: drm connector 4631 * @edid: new value of the edid property 4632 * 4633 * This function creates a new blob modeset object and assigns its id to the 4634 * connector's edid property. 4635 * 4636 * Returns: 4637 * Zero on success, negative errno on failure. 4638 */ 4639 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4640 const struct edid *edid) 4641 { 4642 struct drm_device *dev = connector->dev; 4643 size_t size = 0; 4644 int ret; 4645 4646 /* ignore requests to set edid when overridden */ 4647 if (connector->override_edid) 4648 return 0; 4649 4650 if (edid) 4651 size = EDID_LENGTH * (1 + edid->extensions); 4652 4653 ret = drm_property_replace_global_blob(dev, 4654 &connector->edid_blob_ptr, 4655 size, 4656 edid, 4657 &connector->base, 4658 dev->mode_config.edid_property); 4659 return ret; 4660 } 4661 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4662 4663 /* Some properties could refer to dynamic refcnt'd objects, or things that 4664 * need special locking to handle lifetime issues (ie. to ensure the prop 4665 * value doesn't become invalid part way through the property update due to 4666 * race). The value returned by reference via 'obj' should be passed back 4667 * to drm_property_change_valid_put() after the property is set (and the 4668 * object to which the property is attached has a chance to take it's own 4669 * reference). 4670 */ 4671 bool drm_property_change_valid_get(struct drm_property *property, 4672 uint64_t value, struct drm_mode_object **ref) 4673 { 4674 int i; 4675 4676 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4677 return false; 4678 4679 *ref = NULL; 4680 4681 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4682 if (value < property->values[0] || value > property->values[1]) 4683 return false; 4684 return true; 4685 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4686 int64_t svalue = U642I64(value); 4687 4688 if (svalue < U642I64(property->values[0]) || 4689 svalue > U642I64(property->values[1])) 4690 return false; 4691 return true; 4692 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4693 uint64_t valid_mask = 0; 4694 4695 for (i = 0; i < property->num_values; i++) 4696 valid_mask |= (1ULL << property->values[i]); 4697 return !(value & ~valid_mask); 4698 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4699 struct drm_property_blob *blob; 4700 4701 if (value == 0) 4702 return true; 4703 4704 blob = drm_property_lookup_blob(property->dev, value); 4705 if (blob) { 4706 *ref = &blob->base; 4707 return true; 4708 } else { 4709 return false; 4710 } 4711 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4712 /* a zero value for an object property translates to null: */ 4713 if (value == 0) 4714 return true; 4715 4716 /* handle refcnt'd objects specially: */ 4717 if (property->values[0] == DRM_MODE_OBJECT_FB) { 4718 struct drm_framebuffer *fb; 4719 fb = drm_framebuffer_lookup(property->dev, value); 4720 if (fb) { 4721 *ref = &fb->base; 4722 return true; 4723 } else { 4724 return false; 4725 } 4726 } else { 4727 return _object_find(property->dev, value, property->values[0]) != NULL; 4728 } 4729 } 4730 4731 for (i = 0; i < property->num_values; i++) 4732 if (property->values[i] == value) 4733 return true; 4734 return false; 4735 } 4736 4737 void drm_property_change_valid_put(struct drm_property *property, 4738 struct drm_mode_object *ref) 4739 { 4740 if (!ref) 4741 return; 4742 4743 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4744 if (property->values[0] == DRM_MODE_OBJECT_FB) 4745 drm_framebuffer_unreference(obj_to_fb(ref)); 4746 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4747 drm_property_unreference_blob(obj_to_blob(ref)); 4748 } 4749 4750 /** 4751 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4752 * @dev: DRM device 4753 * @data: ioctl data 4754 * @file_priv: DRM file info 4755 * 4756 * This function sets the current value for a connectors's property. It also 4757 * calls into a driver's ->set_property callback to update the hardware state 4758 * 4759 * Called by the user via ioctl. 4760 * 4761 * Returns: 4762 * Zero on success, negative errno on failure. 4763 */ 4764 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4765 void *data, struct drm_file *file_priv) 4766 { 4767 struct drm_mode_connector_set_property *conn_set_prop = data; 4768 struct drm_mode_obj_set_property obj_set_prop = { 4769 .value = conn_set_prop->value, 4770 .prop_id = conn_set_prop->prop_id, 4771 .obj_id = conn_set_prop->connector_id, 4772 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4773 }; 4774 4775 /* It does all the locking and checking we need */ 4776 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4777 } 4778 4779 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4780 struct drm_property *property, 4781 uint64_t value) 4782 { 4783 int ret = -EINVAL; 4784 struct drm_connector *connector = obj_to_connector(obj); 4785 4786 /* Do DPMS ourselves */ 4787 if (property == connector->dev->mode_config.dpms_property) { 4788 ret = 0; 4789 if (connector->funcs->dpms) 4790 ret = (*connector->funcs->dpms)(connector, (int)value); 4791 } else if (connector->funcs->set_property) 4792 ret = connector->funcs->set_property(connector, property, value); 4793 4794 /* store the property value if successful */ 4795 if (!ret) 4796 drm_object_property_set_value(&connector->base, property, value); 4797 return ret; 4798 } 4799 4800 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4801 struct drm_property *property, 4802 uint64_t value) 4803 { 4804 int ret = -EINVAL; 4805 struct drm_crtc *crtc = obj_to_crtc(obj); 4806 4807 if (crtc->funcs->set_property) 4808 ret = crtc->funcs->set_property(crtc, property, value); 4809 if (!ret) 4810 drm_object_property_set_value(obj, property, value); 4811 4812 return ret; 4813 } 4814 4815 /** 4816 * drm_mode_plane_set_obj_prop - set the value of a property 4817 * @plane: drm plane object to set property value for 4818 * @property: property to set 4819 * @value: value the property should be set to 4820 * 4821 * This functions sets a given property on a given plane object. This function 4822 * calls the driver's ->set_property callback and changes the software state of 4823 * the property if the callback succeeds. 4824 * 4825 * Returns: 4826 * Zero on success, error code on failure. 4827 */ 4828 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4829 struct drm_property *property, 4830 uint64_t value) 4831 { 4832 int ret = -EINVAL; 4833 struct drm_mode_object *obj = &plane->base; 4834 4835 if (plane->funcs->set_property) 4836 ret = plane->funcs->set_property(plane, property, value); 4837 if (!ret) 4838 drm_object_property_set_value(obj, property, value); 4839 4840 return ret; 4841 } 4842 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4843 4844 /** 4845 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 4846 * @dev: DRM device 4847 * @data: ioctl data 4848 * @file_priv: DRM file info 4849 * 4850 * This function retrieves the current value for an object's property. Compared 4851 * to the connector specific ioctl this one is extended to also work on crtc and 4852 * plane objects. 4853 * 4854 * Called by the user via ioctl. 4855 * 4856 * Returns: 4857 * Zero on success, negative errno on failure. 4858 */ 4859 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4860 struct drm_file *file_priv) 4861 { 4862 struct drm_mode_obj_get_properties *arg = data; 4863 struct drm_mode_object *obj; 4864 int ret = 0; 4865 4866 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4867 return -EINVAL; 4868 4869 drm_modeset_lock_all(dev); 4870 4871 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4872 if (!obj) { 4873 ret = -ENOENT; 4874 goto out; 4875 } 4876 if (!obj->properties) { 4877 ret = -EINVAL; 4878 goto out; 4879 } 4880 4881 ret = get_properties(obj, file_priv->atomic, 4882 (uint32_t __user *)(unsigned long)(arg->props_ptr), 4883 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), 4884 &arg->count_props); 4885 4886 out: 4887 drm_modeset_unlock_all(dev); 4888 return ret; 4889 } 4890 4891 /** 4892 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 4893 * @dev: DRM device 4894 * @data: ioctl data 4895 * @file_priv: DRM file info 4896 * 4897 * This function sets the current value for an object's property. It also calls 4898 * into a driver's ->set_property callback to update the hardware state. 4899 * Compared to the connector specific ioctl this one is extended to also work on 4900 * crtc and plane objects. 4901 * 4902 * Called by the user via ioctl. 4903 * 4904 * Returns: 4905 * Zero on success, negative errno on failure. 4906 */ 4907 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 4908 struct drm_file *file_priv) 4909 { 4910 struct drm_mode_obj_set_property *arg = data; 4911 struct drm_mode_object *arg_obj; 4912 struct drm_mode_object *prop_obj; 4913 struct drm_property *property; 4914 int i, ret = -EINVAL; 4915 struct drm_mode_object *ref; 4916 4917 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4918 return -EINVAL; 4919 4920 drm_modeset_lock_all(dev); 4921 4922 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4923 if (!arg_obj) { 4924 ret = -ENOENT; 4925 goto out; 4926 } 4927 if (!arg_obj->properties) 4928 goto out; 4929 4930 for (i = 0; i < arg_obj->properties->count; i++) 4931 if (arg_obj->properties->properties[i]->base.id == arg->prop_id) 4932 break; 4933 4934 if (i == arg_obj->properties->count) 4935 goto out; 4936 4937 prop_obj = drm_mode_object_find(dev, arg->prop_id, 4938 DRM_MODE_OBJECT_PROPERTY); 4939 if (!prop_obj) { 4940 ret = -ENOENT; 4941 goto out; 4942 } 4943 property = obj_to_property(prop_obj); 4944 4945 if (!drm_property_change_valid_get(property, arg->value, &ref)) 4946 goto out; 4947 4948 switch (arg_obj->type) { 4949 case DRM_MODE_OBJECT_CONNECTOR: 4950 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 4951 arg->value); 4952 break; 4953 case DRM_MODE_OBJECT_CRTC: 4954 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 4955 break; 4956 case DRM_MODE_OBJECT_PLANE: 4957 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 4958 property, arg->value); 4959 break; 4960 } 4961 4962 drm_property_change_valid_put(property, ref); 4963 4964 out: 4965 drm_modeset_unlock_all(dev); 4966 return ret; 4967 } 4968 4969 /** 4970 * drm_mode_connector_attach_encoder - attach a connector to an encoder 4971 * @connector: connector to attach 4972 * @encoder: encoder to attach @connector to 4973 * 4974 * This function links up a connector to an encoder. Note that the routing 4975 * restrictions between encoders and crtcs are exposed to userspace through the 4976 * possible_clones and possible_crtcs bitmasks. 4977 * 4978 * Returns: 4979 * Zero on success, negative errno on failure. 4980 */ 4981 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 4982 struct drm_encoder *encoder) 4983 { 4984 int i; 4985 4986 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 4987 if (connector->encoder_ids[i] == 0) { 4988 connector->encoder_ids[i] = encoder->base.id; 4989 return 0; 4990 } 4991 } 4992 return -ENOMEM; 4993 } 4994 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 4995 4996 /** 4997 * drm_mode_crtc_set_gamma_size - set the gamma table size 4998 * @crtc: CRTC to set the gamma table size for 4999 * @gamma_size: size of the gamma table 5000 * 5001 * Drivers which support gamma tables should set this to the supported gamma 5002 * table size when initializing the CRTC. Currently the drm core only supports a 5003 * fixed gamma table size. 5004 * 5005 * Returns: 5006 * Zero on success, negative errno on failure. 5007 */ 5008 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 5009 int gamma_size) 5010 { 5011 crtc->gamma_size = gamma_size; 5012 5013 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, 5014 GFP_KERNEL); 5015 if (!crtc->gamma_store) { 5016 crtc->gamma_size = 0; 5017 return -ENOMEM; 5018 } 5019 5020 return 0; 5021 } 5022 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 5023 5024 /** 5025 * drm_mode_gamma_set_ioctl - set the gamma table 5026 * @dev: DRM device 5027 * @data: ioctl data 5028 * @file_priv: DRM file info 5029 * 5030 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 5031 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 5032 * 5033 * Called by the user via ioctl. 5034 * 5035 * Returns: 5036 * Zero on success, negative errno on failure. 5037 */ 5038 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 5039 void *data, struct drm_file *file_priv) 5040 { 5041 struct drm_mode_crtc_lut *crtc_lut = data; 5042 struct drm_crtc *crtc; 5043 void *r_base, *g_base, *b_base; 5044 int size; 5045 int ret = 0; 5046 5047 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5048 return -EINVAL; 5049 5050 drm_modeset_lock_all(dev); 5051 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5052 if (!crtc) { 5053 ret = -ENOENT; 5054 goto out; 5055 } 5056 5057 if (crtc->funcs->gamma_set == NULL) { 5058 ret = -ENOSYS; 5059 goto out; 5060 } 5061 5062 /* memcpy into gamma store */ 5063 if (crtc_lut->gamma_size != crtc->gamma_size) { 5064 ret = -EINVAL; 5065 goto out; 5066 } 5067 5068 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5069 r_base = crtc->gamma_store; 5070 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 5071 ret = -EFAULT; 5072 goto out; 5073 } 5074 5075 g_base = r_base + size; 5076 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 5077 ret = -EFAULT; 5078 goto out; 5079 } 5080 5081 b_base = g_base + size; 5082 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 5083 ret = -EFAULT; 5084 goto out; 5085 } 5086 5087 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 5088 5089 out: 5090 drm_modeset_unlock_all(dev); 5091 return ret; 5092 5093 } 5094 5095 /** 5096 * drm_mode_gamma_get_ioctl - get the gamma table 5097 * @dev: DRM device 5098 * @data: ioctl data 5099 * @file_priv: DRM file info 5100 * 5101 * Copy the current gamma table into the storage provided. This also provides 5102 * the gamma table size the driver expects, which can be used to size the 5103 * allocated storage. 5104 * 5105 * Called by the user via ioctl. 5106 * 5107 * Returns: 5108 * Zero on success, negative errno on failure. 5109 */ 5110 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 5111 void *data, struct drm_file *file_priv) 5112 { 5113 struct drm_mode_crtc_lut *crtc_lut = data; 5114 struct drm_crtc *crtc; 5115 void *r_base, *g_base, *b_base; 5116 int size; 5117 int ret = 0; 5118 5119 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5120 return -EINVAL; 5121 5122 drm_modeset_lock_all(dev); 5123 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5124 if (!crtc) { 5125 ret = -ENOENT; 5126 goto out; 5127 } 5128 5129 /* memcpy into gamma store */ 5130 if (crtc_lut->gamma_size != crtc->gamma_size) { 5131 ret = -EINVAL; 5132 goto out; 5133 } 5134 5135 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5136 r_base = crtc->gamma_store; 5137 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 5138 ret = -EFAULT; 5139 goto out; 5140 } 5141 5142 g_base = r_base + size; 5143 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 5144 ret = -EFAULT; 5145 goto out; 5146 } 5147 5148 b_base = g_base + size; 5149 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 5150 ret = -EFAULT; 5151 goto out; 5152 } 5153 out: 5154 drm_modeset_unlock_all(dev); 5155 return ret; 5156 } 5157 5158 /** 5159 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 5160 * @dev: DRM device 5161 * @data: ioctl data 5162 * @file_priv: DRM file info 5163 * 5164 * This schedules an asynchronous update on a given CRTC, called page flip. 5165 * Optionally a drm event is generated to signal the completion of the event. 5166 * Generic drivers cannot assume that a pageflip with changed framebuffer 5167 * properties (including driver specific metadata like tiling layout) will work, 5168 * but some drivers support e.g. pixel format changes through the pageflip 5169 * ioctl. 5170 * 5171 * Called by the user via ioctl. 5172 * 5173 * Returns: 5174 * Zero on success, negative errno on failure. 5175 */ 5176 int drm_mode_page_flip_ioctl(struct drm_device *dev, 5177 void *data, struct drm_file *file_priv) 5178 { 5179 struct drm_mode_crtc_page_flip *page_flip = data; 5180 struct drm_crtc *crtc; 5181 struct drm_framebuffer *fb = NULL; 5182 struct drm_pending_vblank_event *e = NULL; 5183 unsigned long flags; 5184 int ret = -EINVAL; 5185 5186 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 5187 page_flip->reserved != 0) 5188 return -EINVAL; 5189 5190 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 5191 return -EINVAL; 5192 5193 crtc = drm_crtc_find(dev, page_flip->crtc_id); 5194 if (!crtc) 5195 return -ENOENT; 5196 5197 drm_modeset_lock_crtc(crtc, crtc->primary); 5198 if (crtc->primary->fb == NULL) { 5199 /* The framebuffer is currently unbound, presumably 5200 * due to a hotplug event, that userspace has not 5201 * yet discovered. 5202 */ 5203 ret = -EBUSY; 5204 goto out; 5205 } 5206 5207 if (crtc->funcs->page_flip == NULL) 5208 goto out; 5209 5210 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 5211 if (!fb) { 5212 ret = -ENOENT; 5213 goto out; 5214 } 5215 5216 if (crtc->state) { 5217 const struct drm_plane_state *state = crtc->primary->state; 5218 5219 ret = check_src_coords(state->src_x, state->src_y, 5220 state->src_w, state->src_h, fb); 5221 } else { 5222 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 5223 } 5224 if (ret) 5225 goto out; 5226 5227 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 5228 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 5229 ret = -EINVAL; 5230 goto out; 5231 } 5232 5233 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5234 ret = -ENOMEM; 5235 spin_lock_irqsave(&dev->event_lock, flags); 5236 if (file_priv->event_space < sizeof(e->event)) { 5237 spin_unlock_irqrestore(&dev->event_lock, flags); 5238 goto out; 5239 } 5240 file_priv->event_space -= sizeof(e->event); 5241 spin_unlock_irqrestore(&dev->event_lock, flags); 5242 5243 e = kzalloc(sizeof(*e), GFP_KERNEL); 5244 if (e == NULL) { 5245 spin_lock_irqsave(&dev->event_lock, flags); 5246 file_priv->event_space += sizeof(e->event); 5247 spin_unlock_irqrestore(&dev->event_lock, flags); 5248 goto out; 5249 } 5250 5251 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 5252 e->event.base.length = sizeof(e->event); 5253 e->event.user_data = page_flip->user_data; 5254 e->base.event = &e->event.base; 5255 e->base.file_priv = file_priv; 5256 e->base.destroy = 5257 (void (*) (struct drm_pending_event *)) kfree; 5258 } 5259 5260 crtc->primary->old_fb = crtc->primary->fb; 5261 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 5262 if (ret) { 5263 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5264 spin_lock_irqsave(&dev->event_lock, flags); 5265 file_priv->event_space += sizeof(e->event); 5266 spin_unlock_irqrestore(&dev->event_lock, flags); 5267 kfree(e); 5268 } 5269 /* Keep the old fb, don't unref it. */ 5270 crtc->primary->old_fb = NULL; 5271 } else { 5272 crtc->primary->fb = fb; 5273 /* Unref only the old framebuffer. */ 5274 fb = NULL; 5275 } 5276 5277 out: 5278 if (fb) 5279 drm_framebuffer_unreference(fb); 5280 if (crtc->primary->old_fb) 5281 drm_framebuffer_unreference(crtc->primary->old_fb); 5282 crtc->primary->old_fb = NULL; 5283 drm_modeset_unlock_crtc(crtc); 5284 5285 return ret; 5286 } 5287 5288 /** 5289 * drm_mode_config_reset - call ->reset callbacks 5290 * @dev: drm device 5291 * 5292 * This functions calls all the crtc's, encoder's and connector's ->reset 5293 * callback. Drivers can use this in e.g. their driver load or resume code to 5294 * reset hardware and software state. 5295 */ 5296 void drm_mode_config_reset(struct drm_device *dev) 5297 { 5298 struct drm_crtc *crtc; 5299 struct drm_plane *plane; 5300 struct drm_encoder *encoder; 5301 struct drm_connector *connector; 5302 5303 drm_for_each_plane(plane, dev) 5304 if (plane->funcs->reset) 5305 plane->funcs->reset(plane); 5306 5307 drm_for_each_crtc(crtc, dev) 5308 if (crtc->funcs->reset) 5309 crtc->funcs->reset(crtc); 5310 5311 drm_for_each_encoder(encoder, dev) 5312 if (encoder->funcs->reset) 5313 encoder->funcs->reset(encoder); 5314 5315 mutex_lock(&dev->mode_config.mutex); 5316 drm_for_each_connector(connector, dev) 5317 if (connector->funcs->reset) 5318 connector->funcs->reset(connector); 5319 mutex_unlock(&dev->mode_config.mutex); 5320 } 5321 EXPORT_SYMBOL(drm_mode_config_reset); 5322 5323 /** 5324 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 5325 * @dev: DRM device 5326 * @data: ioctl data 5327 * @file_priv: DRM file info 5328 * 5329 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 5330 * TTM or something else entirely) and returns the resulting buffer handle. This 5331 * handle can then be wrapped up into a framebuffer modeset object. 5332 * 5333 * Note that userspace is not allowed to use such objects for render 5334 * acceleration - drivers must create their own private ioctls for such a use 5335 * case. 5336 * 5337 * Called by the user via ioctl. 5338 * 5339 * Returns: 5340 * Zero on success, negative errno on failure. 5341 */ 5342 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 5343 void *data, struct drm_file *file_priv) 5344 { 5345 struct drm_mode_create_dumb *args = data; 5346 u32 cpp, stride, size; 5347 5348 if (!dev->driver->dumb_create) 5349 return -ENOSYS; 5350 if (!args->width || !args->height || !args->bpp) 5351 return -EINVAL; 5352 5353 /* overflow checks for 32bit size calculations */ 5354 /* NOTE: DIV_ROUND_UP() can overflow */ 5355 cpp = DIV_ROUND_UP(args->bpp, 8); 5356 if (!cpp || cpp > 0xffffffffU / args->width) 5357 return -EINVAL; 5358 stride = cpp * args->width; 5359 if (args->height > 0xffffffffU / stride) 5360 return -EINVAL; 5361 5362 /* test for wrap-around */ 5363 size = args->height * stride; 5364 if (PAGE_ALIGN(size) == 0) 5365 return -EINVAL; 5366 5367 /* 5368 * handle, pitch and size are output parameters. Zero them out to 5369 * prevent drivers from accidentally using uninitialized data. Since 5370 * not all existing userspace is clearing these fields properly we 5371 * cannot reject IOCTL with garbage in them. 5372 */ 5373 args->handle = 0; 5374 args->pitch = 0; 5375 args->size = 0; 5376 5377 return dev->driver->dumb_create(file_priv, dev, args); 5378 } 5379 5380 /** 5381 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 5382 * @dev: DRM device 5383 * @data: ioctl data 5384 * @file_priv: DRM file info 5385 * 5386 * Allocate an offset in the drm device node's address space to be able to 5387 * memory map a dumb buffer. 5388 * 5389 * Called by the user via ioctl. 5390 * 5391 * Returns: 5392 * Zero on success, negative errno on failure. 5393 */ 5394 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 5395 void *data, struct drm_file *file_priv) 5396 { 5397 struct drm_mode_map_dumb *args = data; 5398 5399 /* call driver ioctl to get mmap offset */ 5400 if (!dev->driver->dumb_map_offset) 5401 return -ENOSYS; 5402 5403 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 5404 } 5405 5406 /** 5407 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 5408 * @dev: DRM device 5409 * @data: ioctl data 5410 * @file_priv: DRM file info 5411 * 5412 * This destroys the userspace handle for the given dumb backing storage buffer. 5413 * Since buffer objects must be reference counted in the kernel a buffer object 5414 * won't be immediately freed if a framebuffer modeset object still uses it. 5415 * 5416 * Called by the user via ioctl. 5417 * 5418 * Returns: 5419 * Zero on success, negative errno on failure. 5420 */ 5421 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 5422 void *data, struct drm_file *file_priv) 5423 { 5424 struct drm_mode_destroy_dumb *args = data; 5425 5426 if (!dev->driver->dumb_destroy) 5427 return -ENOSYS; 5428 5429 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 5430 } 5431 5432 /** 5433 * drm_fb_get_bpp_depth - get the bpp/depth values for format 5434 * @format: pixel format (DRM_FORMAT_*) 5435 * @depth: storage for the depth value 5436 * @bpp: storage for the bpp value 5437 * 5438 * This only supports RGB formats here for compat with code that doesn't use 5439 * pixel formats directly yet. 5440 */ 5441 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 5442 int *bpp) 5443 { 5444 switch (format) { 5445 case DRM_FORMAT_C8: 5446 case DRM_FORMAT_RGB332: 5447 case DRM_FORMAT_BGR233: 5448 *depth = 8; 5449 *bpp = 8; 5450 break; 5451 case DRM_FORMAT_XRGB1555: 5452 case DRM_FORMAT_XBGR1555: 5453 case DRM_FORMAT_RGBX5551: 5454 case DRM_FORMAT_BGRX5551: 5455 case DRM_FORMAT_ARGB1555: 5456 case DRM_FORMAT_ABGR1555: 5457 case DRM_FORMAT_RGBA5551: 5458 case DRM_FORMAT_BGRA5551: 5459 *depth = 15; 5460 *bpp = 16; 5461 break; 5462 case DRM_FORMAT_RGB565: 5463 case DRM_FORMAT_BGR565: 5464 *depth = 16; 5465 *bpp = 16; 5466 break; 5467 case DRM_FORMAT_RGB888: 5468 case DRM_FORMAT_BGR888: 5469 *depth = 24; 5470 *bpp = 24; 5471 break; 5472 case DRM_FORMAT_XRGB8888: 5473 case DRM_FORMAT_XBGR8888: 5474 case DRM_FORMAT_RGBX8888: 5475 case DRM_FORMAT_BGRX8888: 5476 *depth = 24; 5477 *bpp = 32; 5478 break; 5479 case DRM_FORMAT_XRGB2101010: 5480 case DRM_FORMAT_XBGR2101010: 5481 case DRM_FORMAT_RGBX1010102: 5482 case DRM_FORMAT_BGRX1010102: 5483 case DRM_FORMAT_ARGB2101010: 5484 case DRM_FORMAT_ABGR2101010: 5485 case DRM_FORMAT_RGBA1010102: 5486 case DRM_FORMAT_BGRA1010102: 5487 *depth = 30; 5488 *bpp = 32; 5489 break; 5490 case DRM_FORMAT_ARGB8888: 5491 case DRM_FORMAT_ABGR8888: 5492 case DRM_FORMAT_RGBA8888: 5493 case DRM_FORMAT_BGRA8888: 5494 *depth = 32; 5495 *bpp = 32; 5496 break; 5497 default: 5498 DRM_DEBUG_KMS("unsupported pixel format %s\n", 5499 drm_get_format_name(format)); 5500 *depth = 0; 5501 *bpp = 0; 5502 break; 5503 } 5504 } 5505 EXPORT_SYMBOL(drm_fb_get_bpp_depth); 5506 5507 /** 5508 * drm_format_num_planes - get the number of planes for format 5509 * @format: pixel format (DRM_FORMAT_*) 5510 * 5511 * Returns: 5512 * The number of planes used by the specified pixel format. 5513 */ 5514 int drm_format_num_planes(uint32_t format) 5515 { 5516 switch (format) { 5517 case DRM_FORMAT_YUV410: 5518 case DRM_FORMAT_YVU410: 5519 case DRM_FORMAT_YUV411: 5520 case DRM_FORMAT_YVU411: 5521 case DRM_FORMAT_YUV420: 5522 case DRM_FORMAT_YVU420: 5523 case DRM_FORMAT_YUV422: 5524 case DRM_FORMAT_YVU422: 5525 case DRM_FORMAT_YUV444: 5526 case DRM_FORMAT_YVU444: 5527 return 3; 5528 case DRM_FORMAT_NV12: 5529 case DRM_FORMAT_NV21: 5530 case DRM_FORMAT_NV16: 5531 case DRM_FORMAT_NV61: 5532 case DRM_FORMAT_NV24: 5533 case DRM_FORMAT_NV42: 5534 return 2; 5535 default: 5536 return 1; 5537 } 5538 } 5539 EXPORT_SYMBOL(drm_format_num_planes); 5540 5541 /** 5542 * drm_format_plane_cpp - determine the bytes per pixel value 5543 * @format: pixel format (DRM_FORMAT_*) 5544 * @plane: plane index 5545 * 5546 * Returns: 5547 * The bytes per pixel value for the specified plane. 5548 */ 5549 int drm_format_plane_cpp(uint32_t format, int plane) 5550 { 5551 unsigned int depth; 5552 int bpp; 5553 5554 if (plane >= drm_format_num_planes(format)) 5555 return 0; 5556 5557 switch (format) { 5558 case DRM_FORMAT_YUYV: 5559 case DRM_FORMAT_YVYU: 5560 case DRM_FORMAT_UYVY: 5561 case DRM_FORMAT_VYUY: 5562 return 2; 5563 case DRM_FORMAT_NV12: 5564 case DRM_FORMAT_NV21: 5565 case DRM_FORMAT_NV16: 5566 case DRM_FORMAT_NV61: 5567 case DRM_FORMAT_NV24: 5568 case DRM_FORMAT_NV42: 5569 return plane ? 2 : 1; 5570 case DRM_FORMAT_YUV410: 5571 case DRM_FORMAT_YVU410: 5572 case DRM_FORMAT_YUV411: 5573 case DRM_FORMAT_YVU411: 5574 case DRM_FORMAT_YUV420: 5575 case DRM_FORMAT_YVU420: 5576 case DRM_FORMAT_YUV422: 5577 case DRM_FORMAT_YVU422: 5578 case DRM_FORMAT_YUV444: 5579 case DRM_FORMAT_YVU444: 5580 return 1; 5581 default: 5582 drm_fb_get_bpp_depth(format, &depth, &bpp); 5583 return bpp >> 3; 5584 } 5585 } 5586 EXPORT_SYMBOL(drm_format_plane_cpp); 5587 5588 /** 5589 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 5590 * @format: pixel format (DRM_FORMAT_*) 5591 * 5592 * Returns: 5593 * The horizontal chroma subsampling factor for the 5594 * specified pixel format. 5595 */ 5596 int drm_format_horz_chroma_subsampling(uint32_t format) 5597 { 5598 switch (format) { 5599 case DRM_FORMAT_YUV411: 5600 case DRM_FORMAT_YVU411: 5601 case DRM_FORMAT_YUV410: 5602 case DRM_FORMAT_YVU410: 5603 return 4; 5604 case DRM_FORMAT_YUYV: 5605 case DRM_FORMAT_YVYU: 5606 case DRM_FORMAT_UYVY: 5607 case DRM_FORMAT_VYUY: 5608 case DRM_FORMAT_NV12: 5609 case DRM_FORMAT_NV21: 5610 case DRM_FORMAT_NV16: 5611 case DRM_FORMAT_NV61: 5612 case DRM_FORMAT_YUV422: 5613 case DRM_FORMAT_YVU422: 5614 case DRM_FORMAT_YUV420: 5615 case DRM_FORMAT_YVU420: 5616 return 2; 5617 default: 5618 return 1; 5619 } 5620 } 5621 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5622 5623 /** 5624 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5625 * @format: pixel format (DRM_FORMAT_*) 5626 * 5627 * Returns: 5628 * The vertical chroma subsampling factor for the 5629 * specified pixel format. 5630 */ 5631 int drm_format_vert_chroma_subsampling(uint32_t format) 5632 { 5633 switch (format) { 5634 case DRM_FORMAT_YUV410: 5635 case DRM_FORMAT_YVU410: 5636 return 4; 5637 case DRM_FORMAT_YUV420: 5638 case DRM_FORMAT_YVU420: 5639 case DRM_FORMAT_NV12: 5640 case DRM_FORMAT_NV21: 5641 return 2; 5642 default: 5643 return 1; 5644 } 5645 } 5646 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5647 5648 /** 5649 * drm_rotation_simplify() - Try to simplify the rotation 5650 * @rotation: Rotation to be simplified 5651 * @supported_rotations: Supported rotations 5652 * 5653 * Attempt to simplify the rotation to a form that is supported. 5654 * Eg. if the hardware supports everything except DRM_REFLECT_X 5655 * one could call this function like this: 5656 * 5657 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5658 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5659 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5660 * 5661 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5662 * transforms the hardware supports, this function may not 5663 * be able to produce a supported transform, so the caller should 5664 * check the result afterwards. 5665 */ 5666 unsigned int drm_rotation_simplify(unsigned int rotation, 5667 unsigned int supported_rotations) 5668 { 5669 if (rotation & ~supported_rotations) { 5670 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5671 rotation = (rotation & DRM_REFLECT_MASK) | 5672 BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4); 5673 } 5674 5675 return rotation; 5676 } 5677 EXPORT_SYMBOL(drm_rotation_simplify); 5678 5679 /** 5680 * drm_mode_config_init - initialize DRM mode_configuration structure 5681 * @dev: DRM device 5682 * 5683 * Initialize @dev's mode_config structure, used for tracking the graphics 5684 * configuration of @dev. 5685 * 5686 * Since this initializes the modeset locks, no locking is possible. Which is no 5687 * problem, since this should happen single threaded at init time. It is the 5688 * driver's problem to ensure this guarantee. 5689 * 5690 */ 5691 void drm_mode_config_init(struct drm_device *dev) 5692 { 5693 mutex_init(&dev->mode_config.mutex); 5694 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5695 mutex_init(&dev->mode_config.idr_mutex); 5696 mutex_init(&dev->mode_config.fb_lock); 5697 mutex_init(&dev->mode_config.blob_lock); 5698 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5699 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5700 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5701 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5702 INIT_LIST_HEAD(&dev->mode_config.property_list); 5703 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5704 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5705 idr_init(&dev->mode_config.crtc_idr); 5706 idr_init(&dev->mode_config.tile_idr); 5707 5708 drm_modeset_lock_all(dev); 5709 drm_mode_create_standard_properties(dev); 5710 drm_modeset_unlock_all(dev); 5711 5712 /* Just to be sure */ 5713 dev->mode_config.num_fb = 0; 5714 dev->mode_config.num_connector = 0; 5715 dev->mode_config.num_crtc = 0; 5716 dev->mode_config.num_encoder = 0; 5717 dev->mode_config.num_overlay_plane = 0; 5718 dev->mode_config.num_total_plane = 0; 5719 } 5720 EXPORT_SYMBOL(drm_mode_config_init); 5721 5722 /** 5723 * drm_mode_config_cleanup - free up DRM mode_config info 5724 * @dev: DRM device 5725 * 5726 * Free up all the connectors and CRTCs associated with this DRM device, then 5727 * free up the framebuffers and associated buffer objects. 5728 * 5729 * Note that since this /should/ happen single-threaded at driver/device 5730 * teardown time, no locking is required. It's the driver's job to ensure that 5731 * this guarantee actually holds true. 5732 * 5733 * FIXME: cleanup any dangling user buffer objects too 5734 */ 5735 void drm_mode_config_cleanup(struct drm_device *dev) 5736 { 5737 struct drm_connector *connector, *ot; 5738 struct drm_crtc *crtc, *ct; 5739 struct drm_encoder *encoder, *enct; 5740 struct drm_framebuffer *fb, *fbt; 5741 struct drm_property *property, *pt; 5742 struct drm_property_blob *blob, *bt; 5743 struct drm_plane *plane, *plt; 5744 5745 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5746 head) { 5747 encoder->funcs->destroy(encoder); 5748 } 5749 5750 list_for_each_entry_safe(connector, ot, 5751 &dev->mode_config.connector_list, head) { 5752 connector->funcs->destroy(connector); 5753 } 5754 5755 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5756 head) { 5757 drm_property_destroy(dev, property); 5758 } 5759 5760 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5761 head_global) { 5762 drm_property_unreference_blob(blob); 5763 } 5764 5765 /* 5766 * Single-threaded teardown context, so it's not required to grab the 5767 * fb_lock to protect against concurrent fb_list access. Contrary, it 5768 * would actually deadlock with the drm_framebuffer_cleanup function. 5769 * 5770 * Also, if there are any framebuffers left, that's a driver leak now, 5771 * so politely WARN about this. 5772 */ 5773 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5774 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5775 drm_framebuffer_free(&fb->refcount); 5776 } 5777 5778 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5779 head) { 5780 plane->funcs->destroy(plane); 5781 } 5782 5783 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5784 crtc->funcs->destroy(crtc); 5785 } 5786 5787 idr_destroy(&dev->mode_config.tile_idr); 5788 idr_destroy(&dev->mode_config.crtc_idr); 5789 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5790 } 5791 EXPORT_SYMBOL(drm_mode_config_cleanup); 5792 5793 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5794 unsigned int supported_rotations) 5795 { 5796 static const struct drm_prop_enum_list props[] = { 5797 { DRM_ROTATE_0, "rotate-0" }, 5798 { DRM_ROTATE_90, "rotate-90" }, 5799 { DRM_ROTATE_180, "rotate-180" }, 5800 { DRM_ROTATE_270, "rotate-270" }, 5801 { DRM_REFLECT_X, "reflect-x" }, 5802 { DRM_REFLECT_Y, "reflect-y" }, 5803 }; 5804 5805 return drm_property_create_bitmask(dev, 0, "rotation", 5806 props, ARRAY_SIZE(props), 5807 supported_rotations); 5808 } 5809 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5810 5811 /** 5812 * DOC: Tile group 5813 * 5814 * Tile groups are used to represent tiled monitors with a unique 5815 * integer identifier. Tiled monitors using DisplayID v1.3 have 5816 * a unique 8-byte handle, we store this in a tile group, so we 5817 * have a common identifier for all tiles in a monitor group. 5818 */ 5819 static void drm_tile_group_free(struct kref *kref) 5820 { 5821 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5822 struct drm_device *dev = tg->dev; 5823 mutex_lock(&dev->mode_config.idr_mutex); 5824 idr_remove(&dev->mode_config.tile_idr, tg->id); 5825 mutex_unlock(&dev->mode_config.idr_mutex); 5826 kfree(tg); 5827 } 5828 5829 /** 5830 * drm_mode_put_tile_group - drop a reference to a tile group. 5831 * @dev: DRM device 5832 * @tg: tile group to drop reference to. 5833 * 5834 * drop reference to tile group and free if 0. 5835 */ 5836 void drm_mode_put_tile_group(struct drm_device *dev, 5837 struct drm_tile_group *tg) 5838 { 5839 kref_put(&tg->refcount, drm_tile_group_free); 5840 } 5841 5842 /** 5843 * drm_mode_get_tile_group - get a reference to an existing tile group 5844 * @dev: DRM device 5845 * @topology: 8-bytes unique per monitor. 5846 * 5847 * Use the unique bytes to get a reference to an existing tile group. 5848 * 5849 * RETURNS: 5850 * tile group or NULL if not found. 5851 */ 5852 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 5853 char topology[8]) 5854 { 5855 struct drm_tile_group *tg; 5856 int id; 5857 mutex_lock(&dev->mode_config.idr_mutex); 5858 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 5859 if (!memcmp(tg->group_data, topology, 8)) { 5860 if (!kref_get_unless_zero(&tg->refcount)) 5861 tg = NULL; 5862 mutex_unlock(&dev->mode_config.idr_mutex); 5863 return tg; 5864 } 5865 } 5866 mutex_unlock(&dev->mode_config.idr_mutex); 5867 return NULL; 5868 } 5869 EXPORT_SYMBOL(drm_mode_get_tile_group); 5870 5871 /** 5872 * drm_mode_create_tile_group - create a tile group from a displayid description 5873 * @dev: DRM device 5874 * @topology: 8-bytes unique per monitor. 5875 * 5876 * Create a tile group for the unique monitor, and get a unique 5877 * identifier for the tile group. 5878 * 5879 * RETURNS: 5880 * new tile group or error. 5881 */ 5882 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 5883 char topology[8]) 5884 { 5885 struct drm_tile_group *tg; 5886 int ret; 5887 5888 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 5889 if (!tg) 5890 return ERR_PTR(-ENOMEM); 5891 5892 kref_init(&tg->refcount); 5893 memcpy(tg->group_data, topology, 8); 5894 tg->dev = dev; 5895 5896 mutex_lock(&dev->mode_config.idr_mutex); 5897 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 5898 if (ret >= 0) { 5899 tg->id = ret; 5900 } else { 5901 kfree(tg); 5902 tg = ERR_PTR(ret); 5903 } 5904 5905 mutex_unlock(&dev->mode_config.idr_mutex); 5906 return tg; 5907 } 5908 EXPORT_SYMBOL(drm_mode_create_tile_group); 5909