1 /* 2 * Copyright (c) 2006-2008 Intel Corporation 3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 4 * Copyright (c) 2008 Red Hat Inc. 5 * 6 * DRM core CRTC related functions 7 * 8 * Permission to use, copy, modify, distribute, and sell this software and its 9 * documentation for any purpose is hereby granted without fee, provided that 10 * the above copyright notice appear in all copies and that both that copyright 11 * notice and this permission notice appear in supporting documentation, and 12 * that the name of the copyright holders not be used in advertising or 13 * publicity pertaining to distribution of the software without specific, 14 * written prior permission. The copyright holders make no representations 15 * about the suitability of this software for any purpose. It is provided "as 16 * is" without express or implied warranty. 17 * 18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 24 * OF THIS SOFTWARE. 25 * 26 * Authors: 27 * Keith Packard 28 * Eric Anholt <eric@anholt.net> 29 * Dave Airlie <airlied@linux.ie> 30 * Jesse Barnes <jesse.barnes@intel.com> 31 */ 32 #include <linux/ctype.h> 33 #include <linux/list.h> 34 #include <linux/export.h> 35 #include <drm/drmP.h> 36 #include <drm/drm_crtc.h> 37 #include <drm/drm_edid.h> 38 #include <uapi_drm/drm_fourcc.h> 39 #include <linux/slab.h> 40 #include <drm/drm_modeset_lock.h> 41 #include <drm/drm_atomic.h> 42 43 #include "drm_crtc_internal.h" 44 #include "drm_internal.h" 45 46 static struct drm_framebuffer * 47 internal_framebuffer_create(struct drm_device *dev, 48 struct drm_mode_fb_cmd2 *r, 49 struct drm_file *file_priv); 50 51 /* Avoid boilerplate. I'm tired of typing. */ 52 #define DRM_ENUM_NAME_FN(fnname, list) \ 53 const char *fnname(int val) \ 54 { \ 55 int i; \ 56 for (i = 0; i < ARRAY_SIZE(list); i++) { \ 57 if (list[i].type == val) \ 58 return list[i].name; \ 59 } \ 60 return "(unknown)"; \ 61 } 62 63 /* 64 * Global properties 65 */ 66 static const struct drm_prop_enum_list drm_dpms_enum_list[] = { 67 { DRM_MODE_DPMS_ON, "On" }, 68 { DRM_MODE_DPMS_STANDBY, "Standby" }, 69 { DRM_MODE_DPMS_SUSPEND, "Suspend" }, 70 { DRM_MODE_DPMS_OFF, "Off" } 71 }; 72 73 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) 74 75 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { 76 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 77 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 78 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 79 }; 80 81 /* 82 * Optional properties 83 */ 84 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { 85 { DRM_MODE_SCALE_NONE, "None" }, 86 { DRM_MODE_SCALE_FULLSCREEN, "Full" }, 87 { DRM_MODE_SCALE_CENTER, "Center" }, 88 { DRM_MODE_SCALE_ASPECT, "Full aspect" }, 89 }; 90 91 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { 92 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, 93 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, 94 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, 95 }; 96 97 /* 98 * Non-global properties, but "required" for certain connectors. 99 */ 100 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { 101 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 102 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 103 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 104 }; 105 106 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) 107 108 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { 109 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 110 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 111 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 112 }; 113 114 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, 115 drm_dvi_i_subconnector_enum_list) 116 117 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { 118 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 119 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 120 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 121 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 122 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 123 }; 124 125 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) 126 127 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { 128 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 129 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 130 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 131 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 132 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 133 }; 134 135 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, 136 drm_tv_subconnector_enum_list) 137 138 static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = { 139 { DRM_MODE_DIRTY_OFF, "Off" }, 140 { DRM_MODE_DIRTY_ON, "On" }, 141 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" }, 142 }; 143 144 struct drm_conn_prop_enum_list { 145 int type; 146 const char *name; 147 int count; 148 }; 149 150 /* 151 * Connector and encoder types. 152 */ 153 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { 154 { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, 155 { DRM_MODE_CONNECTOR_VGA, "VGA" }, 156 { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, 157 { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, 158 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, 159 { DRM_MODE_CONNECTOR_Composite, "Composite" }, 160 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, 161 { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, 162 { DRM_MODE_CONNECTOR_Component, "Component" }, 163 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, 164 { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, 165 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, 166 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, 167 { DRM_MODE_CONNECTOR_TV, "TV" }, 168 { DRM_MODE_CONNECTOR_eDP, "eDP" }, 169 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, 170 { DRM_MODE_CONNECTOR_DSI, "DSI" }, 171 }; 172 173 static const struct drm_prop_enum_list drm_encoder_enum_list[] = { 174 { DRM_MODE_ENCODER_NONE, "None" }, 175 { DRM_MODE_ENCODER_DAC, "DAC" }, 176 { DRM_MODE_ENCODER_TMDS, "TMDS" }, 177 { DRM_MODE_ENCODER_LVDS, "LVDS" }, 178 { DRM_MODE_ENCODER_TVDAC, "TV" }, 179 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" }, 180 { DRM_MODE_ENCODER_DSI, "DSI" }, 181 { DRM_MODE_ENCODER_DPMST, "DP MST" }, 182 }; 183 184 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { 185 { SubPixelUnknown, "Unknown" }, 186 { SubPixelHorizontalRGB, "Horizontal RGB" }, 187 { SubPixelHorizontalBGR, "Horizontal BGR" }, 188 { SubPixelVerticalRGB, "Vertical RGB" }, 189 { SubPixelVerticalBGR, "Vertical BGR" }, 190 { SubPixelNone, "None" }, 191 }; 192 193 void drm_connector_ida_init(void) 194 { 195 #if 0 196 int i; 197 198 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 199 ida_init(&drm_connector_enum_list[i].ida); 200 #endif 201 } 202 203 void drm_connector_ida_destroy(void) 204 { 205 #if 0 206 int i; 207 208 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 209 ida_destroy(&drm_connector_enum_list[i].ida); 210 #endif 211 } 212 213 /** 214 * drm_get_connector_status_name - return a string for connector status 215 * @status: connector status to compute name of 216 * 217 * In contrast to the other drm_get_*_name functions this one here returns a 218 * const pointer and hence is threadsafe. 219 */ 220 const char *drm_get_connector_status_name(enum drm_connector_status status) 221 { 222 if (status == connector_status_connected) 223 return "connected"; 224 else if (status == connector_status_disconnected) 225 return "disconnected"; 226 else 227 return "unknown"; 228 } 229 EXPORT_SYMBOL(drm_get_connector_status_name); 230 231 /** 232 * drm_get_subpixel_order_name - return a string for a given subpixel enum 233 * @order: enum of subpixel_order 234 * 235 * Note you could abuse this and return something out of bounds, but that 236 * would be a caller error. No unscrubbed user data should make it here. 237 */ 238 const char *drm_get_subpixel_order_name(enum subpixel_order order) 239 { 240 return drm_subpixel_enum_list[order].name; 241 } 242 EXPORT_SYMBOL(drm_get_subpixel_order_name); 243 244 static char printable_char(int c) 245 { 246 return isascii(c) && isprint(c) ? c : '?'; 247 } 248 249 /** 250 * drm_get_format_name - return a string for drm fourcc format 251 * @format: format to compute name of 252 * 253 * Note that the buffer used by this function is globally shared and owned by 254 * the function itself. 255 * 256 * FIXME: This isn't really multithreading safe. 257 */ 258 const char *drm_get_format_name(uint32_t format) 259 { 260 static char buf[32]; 261 262 ksnprintf(buf, sizeof(buf), 263 "%c%c%c%c %s-endian (0x%08x)", 264 printable_char(format & 0xff), 265 printable_char((format >> 8) & 0xff), 266 printable_char((format >> 16) & 0xff), 267 printable_char((format >> 24) & 0x7f), 268 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", 269 format); 270 271 return buf; 272 } 273 EXPORT_SYMBOL(drm_get_format_name); 274 275 /* 276 * Internal function to assign a slot in the object idr and optionally 277 * register the object into the idr. 278 */ 279 static int drm_mode_object_get_reg(struct drm_device *dev, 280 struct drm_mode_object *obj, 281 uint32_t obj_type, 282 bool register_obj) 283 { 284 int ret; 285 286 mutex_lock(&dev->mode_config.idr_mutex); 287 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); 288 if (ret >= 0) { 289 /* 290 * Set up the object linking under the protection of the idr 291 * lock so that other users can't see inconsistent state. 292 */ 293 obj->id = ret; 294 obj->type = obj_type; 295 } 296 mutex_unlock(&dev->mode_config.idr_mutex); 297 298 return ret < 0 ? ret : 0; 299 } 300 301 /** 302 * drm_mode_object_get - allocate a new modeset identifier 303 * @dev: DRM device 304 * @obj: object pointer, used to generate unique ID 305 * @obj_type: object type 306 * 307 * Create a unique identifier based on @ptr in @dev's identifier space. Used 308 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix 309 * modeset identifiers are _not_ reference counted. Hence don't use this for 310 * reference counted modeset objects like framebuffers. 311 * 312 * Returns: 313 * Zero on success, error code on failure. 314 */ 315 int drm_mode_object_get(struct drm_device *dev, 316 struct drm_mode_object *obj, uint32_t obj_type) 317 { 318 return drm_mode_object_get_reg(dev, obj, obj_type, true); 319 } 320 321 static void drm_mode_object_register(struct drm_device *dev, 322 struct drm_mode_object *obj) 323 { 324 mutex_lock(&dev->mode_config.idr_mutex); 325 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); 326 mutex_unlock(&dev->mode_config.idr_mutex); 327 } 328 329 /** 330 * drm_mode_object_put - free a modeset identifer 331 * @dev: DRM device 332 * @object: object to free 333 * 334 * Free @id from @dev's unique identifier pool. Note that despite the _get 335 * postfix modeset identifiers are _not_ reference counted. Hence don't use this 336 * for reference counted modeset objects like framebuffers. 337 */ 338 void drm_mode_object_put(struct drm_device *dev, 339 struct drm_mode_object *object) 340 { 341 mutex_lock(&dev->mode_config.idr_mutex); 342 idr_remove(&dev->mode_config.crtc_idr, object->id); 343 mutex_unlock(&dev->mode_config.idr_mutex); 344 } 345 346 static struct drm_mode_object *_object_find(struct drm_device *dev, 347 uint32_t id, uint32_t type) 348 { 349 struct drm_mode_object *obj = NULL; 350 351 mutex_lock(&dev->mode_config.idr_mutex); 352 obj = idr_find(&dev->mode_config.crtc_idr, id); 353 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) 354 obj = NULL; 355 if (obj && obj->id != id) 356 obj = NULL; 357 /* don't leak out unref'd fb's */ 358 if (obj && 359 (obj->type == DRM_MODE_OBJECT_FB || 360 obj->type == DRM_MODE_OBJECT_BLOB)) 361 obj = NULL; 362 mutex_unlock(&dev->mode_config.idr_mutex); 363 364 return obj; 365 } 366 367 /** 368 * drm_mode_object_find - look up a drm object with static lifetime 369 * @dev: drm device 370 * @id: id of the mode object 371 * @type: type of the mode object 372 * 373 * Note that framebuffers cannot be looked up with this functions - since those 374 * are reference counted, they need special treatment. Even with 375 * DRM_MODE_OBJECT_ANY (although that will simply return NULL 376 * rather than WARN_ON()). 377 */ 378 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, 379 uint32_t id, uint32_t type) 380 { 381 struct drm_mode_object *obj = NULL; 382 383 /* Framebuffers are reference counted and need their own lookup 384 * function.*/ 385 WARN_ON(type == DRM_MODE_OBJECT_FB || type == DRM_MODE_OBJECT_BLOB); 386 obj = _object_find(dev, id, type); 387 return obj; 388 } 389 EXPORT_SYMBOL(drm_mode_object_find); 390 391 /** 392 * drm_framebuffer_init - initialize a framebuffer 393 * @dev: DRM device 394 * @fb: framebuffer to be initialized 395 * @funcs: ... with these functions 396 * 397 * Allocates an ID for the framebuffer's parent mode object, sets its mode 398 * functions & device file and adds it to the master fd list. 399 * 400 * IMPORTANT: 401 * This functions publishes the fb and makes it available for concurrent access 402 * by other users. Which means by this point the fb _must_ be fully set up - 403 * since all the fb attributes are invariant over its lifetime, no further 404 * locking but only correct reference counting is required. 405 * 406 * Returns: 407 * Zero on success, error code on failure. 408 */ 409 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, 410 const struct drm_framebuffer_funcs *funcs) 411 { 412 int ret; 413 414 mutex_lock(&dev->mode_config.fb_lock); 415 kref_init(&fb->refcount); 416 INIT_LIST_HEAD(&fb->filp_head); 417 fb->dev = dev; 418 fb->funcs = funcs; 419 420 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB); 421 if (ret) 422 goto out; 423 424 dev->mode_config.num_fb++; 425 list_add(&fb->head, &dev->mode_config.fb_list); 426 out: 427 mutex_unlock(&dev->mode_config.fb_lock); 428 429 return ret; 430 } 431 EXPORT_SYMBOL(drm_framebuffer_init); 432 433 /* dev->mode_config.fb_lock must be held! */ 434 static void __drm_framebuffer_unregister(struct drm_device *dev, 435 struct drm_framebuffer *fb) 436 { 437 mutex_lock(&dev->mode_config.idr_mutex); 438 idr_remove(&dev->mode_config.crtc_idr, fb->base.id); 439 mutex_unlock(&dev->mode_config.idr_mutex); 440 441 fb->base.id = 0; 442 } 443 444 static void drm_framebuffer_free(struct kref *kref) 445 { 446 struct drm_framebuffer *fb = 447 container_of(kref, struct drm_framebuffer, refcount); 448 struct drm_device *dev = fb->dev; 449 450 /* 451 * The lookup idr holds a weak reference, which has not necessarily been 452 * removed at this point. Check for that. 453 */ 454 mutex_lock(&dev->mode_config.fb_lock); 455 if (fb->base.id) { 456 /* Mark fb as reaped and drop idr ref. */ 457 __drm_framebuffer_unregister(dev, fb); 458 } 459 mutex_unlock(&dev->mode_config.fb_lock); 460 461 fb->funcs->destroy(fb); 462 } 463 464 static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev, 465 uint32_t id) 466 { 467 struct drm_mode_object *obj = NULL; 468 struct drm_framebuffer *fb; 469 470 mutex_lock(&dev->mode_config.idr_mutex); 471 obj = idr_find(&dev->mode_config.crtc_idr, id); 472 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id)) 473 fb = NULL; 474 else 475 fb = obj_to_fb(obj); 476 mutex_unlock(&dev->mode_config.idr_mutex); 477 478 return fb; 479 } 480 481 /** 482 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference 483 * @dev: drm device 484 * @id: id of the fb object 485 * 486 * If successful, this grabs an additional reference to the framebuffer - 487 * callers need to make sure to eventually unreference the returned framebuffer 488 * again, using @drm_framebuffer_unreference. 489 */ 490 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, 491 uint32_t id) 492 { 493 struct drm_framebuffer *fb; 494 495 mutex_lock(&dev->mode_config.fb_lock); 496 fb = __drm_framebuffer_lookup(dev, id); 497 if (fb) { 498 if (!kref_get_unless_zero(&fb->refcount)) 499 fb = NULL; 500 } 501 mutex_unlock(&dev->mode_config.fb_lock); 502 503 return fb; 504 } 505 EXPORT_SYMBOL(drm_framebuffer_lookup); 506 507 /** 508 * drm_framebuffer_unreference - unref a framebuffer 509 * @fb: framebuffer to unref 510 * 511 * This functions decrements the fb's refcount and frees it if it drops to zero. 512 */ 513 void drm_framebuffer_unreference(struct drm_framebuffer *fb) 514 { 515 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 516 kref_put(&fb->refcount, drm_framebuffer_free); 517 } 518 EXPORT_SYMBOL(drm_framebuffer_unreference); 519 520 /** 521 * drm_framebuffer_reference - incr the fb refcnt 522 * @fb: framebuffer 523 * 524 * This functions increments the fb's refcount. 525 */ 526 void drm_framebuffer_reference(struct drm_framebuffer *fb) 527 { 528 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 529 kref_get(&fb->refcount); 530 } 531 EXPORT_SYMBOL(drm_framebuffer_reference); 532 533 /** 534 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr 535 * @fb: fb to unregister 536 * 537 * Drivers need to call this when cleaning up driver-private framebuffers, e.g. 538 * those used for fbdev. Note that the caller must hold a reference of it's own, 539 * i.e. the object may not be destroyed through this call (since it'll lead to a 540 * locking inversion). 541 */ 542 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) 543 { 544 struct drm_device *dev; 545 546 if (!fb) 547 return; 548 549 dev = fb->dev; 550 551 mutex_lock(&dev->mode_config.fb_lock); 552 /* Mark fb as reaped and drop idr ref. */ 553 __drm_framebuffer_unregister(dev, fb); 554 mutex_unlock(&dev->mode_config.fb_lock); 555 } 556 EXPORT_SYMBOL(drm_framebuffer_unregister_private); 557 558 /** 559 * drm_framebuffer_cleanup - remove a framebuffer object 560 * @fb: framebuffer to remove 561 * 562 * Cleanup framebuffer. This function is intended to be used from the drivers 563 * ->destroy callback. It can also be used to clean up driver private 564 * framebuffers embedded into a larger structure. 565 * 566 * Note that this function does not remove the fb from active usuage - if it is 567 * still used anywhere, hilarity can ensue since userspace could call getfb on 568 * the id and get back -EINVAL. Obviously no concern at driver unload time. 569 * 570 * Also, the framebuffer will not be removed from the lookup idr - for 571 * user-created framebuffers this will happen in in the rmfb ioctl. For 572 * driver-private objects (e.g. for fbdev) drivers need to explicitly call 573 * drm_framebuffer_unregister_private. 574 */ 575 void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 576 { 577 struct drm_device *dev = fb->dev; 578 579 mutex_lock(&dev->mode_config.fb_lock); 580 list_del(&fb->head); 581 dev->mode_config.num_fb--; 582 mutex_unlock(&dev->mode_config.fb_lock); 583 } 584 EXPORT_SYMBOL(drm_framebuffer_cleanup); 585 586 /** 587 * drm_framebuffer_remove - remove and unreference a framebuffer object 588 * @fb: framebuffer to remove 589 * 590 * Scans all the CRTCs and planes in @dev's mode_config. If they're 591 * using @fb, removes it, setting it to NULL. Then drops the reference to the 592 * passed-in framebuffer. Might take the modeset locks. 593 * 594 * Note that this function optimizes the cleanup away if the caller holds the 595 * last reference to the framebuffer. It is also guaranteed to not take the 596 * modeset locks in this case. 597 */ 598 void drm_framebuffer_remove(struct drm_framebuffer *fb) 599 { 600 struct drm_device *dev; 601 struct drm_crtc *crtc; 602 struct drm_plane *plane; 603 struct drm_mode_set set; 604 int ret; 605 606 if (!fb) 607 return; 608 609 dev = fb->dev; 610 611 WARN_ON(!list_empty(&fb->filp_head)); 612 613 /* 614 * drm ABI mandates that we remove any deleted framebuffers from active 615 * useage. But since most sane clients only remove framebuffers they no 616 * longer need, try to optimize this away. 617 * 618 * Since we're holding a reference ourselves, observing a refcount of 1 619 * means that we're the last holder and can skip it. Also, the refcount 620 * can never increase from 1 again, so we don't need any barriers or 621 * locks. 622 * 623 * Note that userspace could try to race with use and instate a new 624 * usage _after_ we've cleared all current ones. End result will be an 625 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot 626 * in this manner. 627 */ 628 if (atomic_read(&fb->refcount.refcount) > 1) { 629 drm_modeset_lock_all(dev); 630 /* remove from any CRTC */ 631 drm_for_each_crtc(crtc, dev) { 632 if (crtc->primary->fb == fb) { 633 /* should turn off the crtc */ 634 memset(&set, 0, sizeof(struct drm_mode_set)); 635 set.crtc = crtc; 636 set.fb = NULL; 637 ret = drm_mode_set_config_internal(&set); 638 if (ret) 639 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); 640 } 641 } 642 643 drm_for_each_plane(plane, dev) { 644 if (plane->fb == fb) 645 drm_plane_force_disable(plane); 646 } 647 drm_modeset_unlock_all(dev); 648 } 649 650 drm_framebuffer_unreference(fb); 651 } 652 EXPORT_SYMBOL(drm_framebuffer_remove); 653 654 DEFINE_WW_CLASS(crtc_ww_class); 655 656 /** 657 * drm_crtc_init_with_planes - Initialise a new CRTC object with 658 * specified primary and cursor planes. 659 * @dev: DRM device 660 * @crtc: CRTC object to init 661 * @primary: Primary plane for CRTC 662 * @cursor: Cursor plane for CRTC 663 * @funcs: callbacks for the new CRTC 664 * 665 * Inits a new object created as base part of a driver crtc object. 666 * 667 * Returns: 668 * Zero on success, error code on failure. 669 */ 670 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 671 struct drm_plane *primary, 672 struct drm_plane *cursor, 673 const struct drm_crtc_funcs *funcs) 674 { 675 struct drm_mode_config *config = &dev->mode_config; 676 int ret; 677 678 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); 679 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); 680 681 crtc->dev = dev; 682 crtc->funcs = funcs; 683 684 drm_modeset_lock_init(&crtc->mutex); 685 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 686 if (ret) 687 return ret; 688 689 crtc->base.properties = &crtc->properties; 690 691 list_add_tail(&crtc->head, &config->crtc_list); 692 config->num_crtc++; 693 694 crtc->primary = primary; 695 crtc->cursor = cursor; 696 if (primary) 697 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 698 if (cursor) 699 cursor->possible_crtcs = 1 << drm_crtc_index(crtc); 700 701 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 702 drm_object_attach_property(&crtc->base, config->prop_active, 0); 703 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); 704 } 705 706 return 0; 707 } 708 EXPORT_SYMBOL(drm_crtc_init_with_planes); 709 710 /** 711 * drm_crtc_cleanup - Clean up the core crtc usage 712 * @crtc: CRTC to cleanup 713 * 714 * This function cleans up @crtc and removes it from the DRM mode setting 715 * core. Note that the function does *not* free the crtc structure itself, 716 * this is the responsibility of the caller. 717 */ 718 void drm_crtc_cleanup(struct drm_crtc *crtc) 719 { 720 struct drm_device *dev = crtc->dev; 721 722 kfree(crtc->gamma_store); 723 crtc->gamma_store = NULL; 724 725 drm_modeset_lock_fini(&crtc->mutex); 726 727 drm_mode_object_put(dev, &crtc->base); 728 list_del(&crtc->head); 729 dev->mode_config.num_crtc--; 730 731 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); 732 if (crtc->state && crtc->funcs->atomic_destroy_state) 733 crtc->funcs->atomic_destroy_state(crtc, crtc->state); 734 735 memset(crtc, 0, sizeof(*crtc)); 736 } 737 EXPORT_SYMBOL(drm_crtc_cleanup); 738 739 /** 740 * drm_crtc_index - find the index of a registered CRTC 741 * @crtc: CRTC to find index for 742 * 743 * Given a registered CRTC, return the index of that CRTC within a DRM 744 * device's list of CRTCs. 745 */ 746 unsigned int drm_crtc_index(struct drm_crtc *crtc) 747 { 748 unsigned int index = 0; 749 struct drm_crtc *tmp; 750 751 drm_for_each_crtc(tmp, crtc->dev) { 752 if (tmp == crtc) 753 return index; 754 755 index++; 756 } 757 758 BUG(); 759 } 760 EXPORT_SYMBOL(drm_crtc_index); 761 762 /* 763 * drm_mode_remove - remove and free a mode 764 * @connector: connector list to modify 765 * @mode: mode to remove 766 * 767 * Remove @mode from @connector's mode list, then free it. 768 */ 769 static void drm_mode_remove(struct drm_connector *connector, 770 struct drm_display_mode *mode) 771 { 772 list_del(&mode->head); 773 drm_mode_destroy(connector->dev, mode); 774 } 775 776 /** 777 * drm_display_info_set_bus_formats - set the supported bus formats 778 * @info: display info to store bus formats in 779 * @fmts: array containing the supported bus formats 780 * @nfmts: the number of entries in the fmts array 781 * 782 * Store the supported bus formats in display info structure. 783 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for 784 * a full list of available formats. 785 */ 786 int drm_display_info_set_bus_formats(struct drm_display_info *info, 787 const u32 *formats, 788 unsigned int num_formats) 789 { 790 u32 *fmts = NULL; 791 792 if (!formats && num_formats) 793 return -EINVAL; 794 795 if (formats && num_formats) { 796 fmts = kmemdup(formats, sizeof(*formats) * num_formats, 797 GFP_KERNEL); 798 if (!fmts) 799 return -ENOMEM; 800 } 801 802 kfree(info->bus_formats); 803 info->bus_formats = fmts; 804 info->num_bus_formats = num_formats; 805 806 return 0; 807 } 808 EXPORT_SYMBOL(drm_display_info_set_bus_formats); 809 810 /** 811 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 812 * @connector: connector to quwery 813 * 814 * The kernel supports per-connector configration of its consoles through 815 * use of the video= parameter. This function parses that option and 816 * extracts the user's specified mode (or enable/disable status) for a 817 * particular connector. This is typically only used during the early fbdev 818 * setup. 819 */ 820 static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 821 { 822 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 823 char *option = NULL; 824 825 if (fb_get_options(connector->name, &option)) 826 return; 827 828 if (!drm_mode_parse_command_line_for_connector(option, 829 connector, 830 mode)) 831 return; 832 833 if (mode->force) { 834 const char *s; 835 836 switch (mode->force) { 837 case DRM_FORCE_OFF: 838 s = "OFF"; 839 break; 840 case DRM_FORCE_ON_DIGITAL: 841 s = "ON - dig"; 842 break; 843 default: 844 case DRM_FORCE_ON: 845 s = "ON"; 846 break; 847 } 848 849 DRM_INFO("forcing %s connector %s\n", connector->name, s); 850 connector->force = mode->force; 851 } 852 853 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 854 connector->name, 855 mode->xres, mode->yres, 856 mode->refresh_specified ? mode->refresh : 60, 857 mode->rb ? " reduced blanking" : "", 858 mode->margins ? " with margins" : "", 859 mode->interlace ? " interlaced" : ""); 860 } 861 862 /** 863 * drm_connector_init - Init a preallocated connector 864 * @dev: DRM device 865 * @connector: the connector to init 866 * @funcs: callbacks for this connector 867 * @connector_type: user visible type of the connector 868 * 869 * Initialises a preallocated connector. Connectors should be 870 * subclassed as part of driver connector objects. 871 * 872 * Returns: 873 * Zero on success, error code on failure. 874 */ 875 int drm_connector_init(struct drm_device *dev, 876 struct drm_connector *connector, 877 const struct drm_connector_funcs *funcs, 878 int connector_type) 879 { 880 struct drm_mode_config *config = &dev->mode_config; 881 int ret; 882 883 drm_modeset_lock_all(dev); 884 885 ret = drm_mode_object_get(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR); 886 if (ret) 887 goto out_unlock; 888 889 connector->base.properties = &connector->properties; 890 connector->dev = dev; 891 connector->funcs = funcs; 892 connector->connector_type = connector_type; 893 connector->connector_type_id = 894 ++drm_connector_enum_list[connector_type].count; /* TODO */ 895 if (connector->connector_type_id < 0) { 896 ret = connector->connector_type_id; 897 goto out_put; 898 } 899 connector->name = 900 drm_asprintf(GFP_KERNEL, "%s-%d", 901 drm_connector_enum_list[connector_type].name, 902 connector->connector_type_id); 903 if (!connector->name) { 904 ret = -ENOMEM; 905 goto out_put; 906 } 907 908 INIT_LIST_HEAD(&connector->probed_modes); 909 INIT_LIST_HEAD(&connector->modes); 910 connector->edid_blob_ptr = NULL; 911 connector->status = connector_status_unknown; 912 913 drm_connector_get_cmdline_mode(connector); 914 915 /* We should add connectors at the end to avoid upsetting the connector 916 * index too much. */ 917 list_add_tail(&connector->head, &config->connector_list); 918 config->num_connector++; 919 920 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 921 drm_object_attach_property(&connector->base, 922 config->edid_property, 923 0); 924 925 drm_object_attach_property(&connector->base, 926 config->dpms_property, 0); 927 928 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 929 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); 930 } 931 932 connector->debugfs_entry = NULL; 933 934 out_put: 935 if (ret) 936 drm_mode_object_put(dev, &connector->base); 937 938 out_unlock: 939 drm_modeset_unlock_all(dev); 940 941 return ret; 942 } 943 EXPORT_SYMBOL(drm_connector_init); 944 945 /** 946 * drm_connector_cleanup - cleans up an initialised connector 947 * @connector: connector to cleanup 948 * 949 * Cleans up the connector but doesn't free the object. 950 */ 951 void drm_connector_cleanup(struct drm_connector *connector) 952 { 953 struct drm_device *dev = connector->dev; 954 struct drm_display_mode *mode, *t; 955 956 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 957 drm_mode_remove(connector, mode); 958 959 list_for_each_entry_safe(mode, t, &connector->modes, head) 960 drm_mode_remove(connector, mode); 961 962 kfree(connector->display_info.bus_formats); 963 drm_mode_object_put(dev, &connector->base); 964 kfree(connector->name); 965 connector->name = NULL; 966 list_del(&connector->head); 967 dev->mode_config.num_connector--; 968 969 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 970 if (connector->state && connector->funcs->atomic_destroy_state) 971 connector->funcs->atomic_destroy_state(connector, 972 connector->state); 973 974 memset(connector, 0, sizeof(*connector)); 975 } 976 EXPORT_SYMBOL(drm_connector_cleanup); 977 978 /** 979 * drm_connector_index - find the index of a registered connector 980 * @connector: connector to find index for 981 * 982 * Given a registered connector, return the index of that connector within a DRM 983 * device's list of connectors. 984 */ 985 unsigned int drm_connector_index(struct drm_connector *connector) 986 { 987 unsigned int index = 0; 988 struct drm_connector *tmp; 989 struct drm_mode_config *config = &connector->dev->mode_config; 990 991 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 992 993 drm_for_each_connector(tmp, connector->dev) { 994 if (tmp == connector) 995 return index; 996 997 index++; 998 } 999 1000 BUG(); 1001 } 1002 EXPORT_SYMBOL(drm_connector_index); 1003 1004 /** 1005 * drm_connector_register - register a connector 1006 * @connector: the connector to register 1007 * 1008 * Register userspace interfaces for a connector 1009 * 1010 * Returns: 1011 * Zero on success, error code on failure. 1012 */ 1013 int drm_connector_register(struct drm_connector *connector) 1014 { 1015 int ret; 1016 1017 drm_mode_object_register(connector->dev, &connector->base); 1018 1019 ret = drm_sysfs_connector_add(connector); 1020 if (ret) 1021 return ret; 1022 1023 ret = drm_debugfs_connector_add(connector); 1024 if (ret) { 1025 drm_sysfs_connector_remove(connector); 1026 return ret; 1027 } 1028 1029 return 0; 1030 } 1031 EXPORT_SYMBOL(drm_connector_register); 1032 1033 /** 1034 * drm_connector_unregister - unregister a connector 1035 * @connector: the connector to unregister 1036 * 1037 * Unregister userspace interfaces for a connector 1038 */ 1039 void drm_connector_unregister(struct drm_connector *connector) 1040 { 1041 drm_sysfs_connector_remove(connector); 1042 #if 0 1043 drm_debugfs_connector_remove(connector); 1044 #endif 1045 } 1046 EXPORT_SYMBOL(drm_connector_unregister); 1047 1048 1049 /** 1050 * drm_connector_unplug_all - unregister connector userspace interfaces 1051 * @dev: drm device 1052 * 1053 * This function unregisters all connector userspace interfaces in sysfs. Should 1054 * be call when the device is disconnected, e.g. from an usb driver's 1055 * ->disconnect callback. 1056 */ 1057 void drm_connector_unplug_all(struct drm_device *dev) 1058 { 1059 struct drm_connector *connector; 1060 1061 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */ 1062 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1063 drm_connector_unregister(connector); 1064 1065 } 1066 EXPORT_SYMBOL(drm_connector_unplug_all); 1067 1068 /** 1069 * drm_encoder_init - Init a preallocated encoder 1070 * @dev: drm device 1071 * @encoder: the encoder to init 1072 * @funcs: callbacks for this encoder 1073 * @encoder_type: user visible type of the encoder 1074 * 1075 * Initialises a preallocated encoder. Encoder should be 1076 * subclassed as part of driver encoder objects. 1077 * 1078 * Returns: 1079 * Zero on success, error code on failure. 1080 */ 1081 int drm_encoder_init(struct drm_device *dev, 1082 struct drm_encoder *encoder, 1083 const struct drm_encoder_funcs *funcs, 1084 int encoder_type) 1085 { 1086 int ret; 1087 1088 drm_modeset_lock_all(dev); 1089 1090 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1091 if (ret) 1092 goto out_unlock; 1093 1094 encoder->dev = dev; 1095 encoder->encoder_type = encoder_type; 1096 encoder->funcs = funcs; 1097 encoder->name = drm_asprintf(GFP_KERNEL, "%s-%d", 1098 drm_encoder_enum_list[encoder_type].name, 1099 encoder->base.id); 1100 if (!encoder->name) { 1101 ret = -ENOMEM; 1102 goto out_put; 1103 } 1104 1105 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1106 dev->mode_config.num_encoder++; 1107 1108 out_put: 1109 if (ret) 1110 drm_mode_object_put(dev, &encoder->base); 1111 1112 out_unlock: 1113 drm_modeset_unlock_all(dev); 1114 1115 return ret; 1116 } 1117 EXPORT_SYMBOL(drm_encoder_init); 1118 1119 /** 1120 * drm_encoder_cleanup - cleans up an initialised encoder 1121 * @encoder: encoder to cleanup 1122 * 1123 * Cleans up the encoder but doesn't free the object. 1124 */ 1125 void drm_encoder_cleanup(struct drm_encoder *encoder) 1126 { 1127 struct drm_device *dev = encoder->dev; 1128 1129 drm_modeset_lock_all(dev); 1130 drm_mode_object_put(dev, &encoder->base); 1131 kfree(encoder->name); 1132 list_del(&encoder->head); 1133 dev->mode_config.num_encoder--; 1134 drm_modeset_unlock_all(dev); 1135 1136 memset(encoder, 0, sizeof(*encoder)); 1137 } 1138 EXPORT_SYMBOL(drm_encoder_cleanup); 1139 1140 /** 1141 * drm_universal_plane_init - Initialize a new universal plane object 1142 * @dev: DRM device 1143 * @plane: plane object to init 1144 * @possible_crtcs: bitmask of possible CRTCs 1145 * @funcs: callbacks for the new plane 1146 * @formats: array of supported formats (%DRM_FORMAT_*) 1147 * @format_count: number of elements in @formats 1148 * @type: type of plane (overlay, primary, cursor) 1149 * 1150 * Initializes a plane object of type @type. 1151 * 1152 * Returns: 1153 * Zero on success, error code on failure. 1154 */ 1155 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1156 unsigned long possible_crtcs, 1157 const struct drm_plane_funcs *funcs, 1158 const uint32_t *formats, unsigned int format_count, 1159 enum drm_plane_type type) 1160 { 1161 struct drm_mode_config *config = &dev->mode_config; 1162 int ret; 1163 1164 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1165 if (ret) 1166 return ret; 1167 1168 drm_modeset_lock_init(&plane->mutex); 1169 1170 plane->base.properties = &plane->properties; 1171 plane->dev = dev; 1172 plane->funcs = funcs; 1173 plane->format_types = kmalloc(sizeof(uint32_t) * format_count, 1174 M_DRM, M_WAITOK); 1175 if (!plane->format_types) { 1176 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1177 drm_mode_object_put(dev, &plane->base); 1178 return -ENOMEM; 1179 } 1180 1181 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1182 plane->format_count = format_count; 1183 plane->possible_crtcs = possible_crtcs; 1184 plane->type = type; 1185 1186 list_add_tail(&plane->head, &config->plane_list); 1187 config->num_total_plane++; 1188 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1189 config->num_overlay_plane++; 1190 1191 drm_object_attach_property(&plane->base, 1192 config->plane_type_property, 1193 plane->type); 1194 1195 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 1196 drm_object_attach_property(&plane->base, config->prop_fb_id, 0); 1197 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); 1198 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); 1199 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); 1200 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); 1201 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); 1202 drm_object_attach_property(&plane->base, config->prop_src_x, 0); 1203 drm_object_attach_property(&plane->base, config->prop_src_y, 0); 1204 drm_object_attach_property(&plane->base, config->prop_src_w, 0); 1205 drm_object_attach_property(&plane->base, config->prop_src_h, 0); 1206 } 1207 1208 return 0; 1209 } 1210 EXPORT_SYMBOL(drm_universal_plane_init); 1211 1212 /** 1213 * drm_plane_init - Initialize a legacy plane 1214 * @dev: DRM device 1215 * @plane: plane object to init 1216 * @possible_crtcs: bitmask of possible CRTCs 1217 * @funcs: callbacks for the new plane 1218 * @formats: array of supported formats (%DRM_FORMAT_*) 1219 * @format_count: number of elements in @formats 1220 * @is_primary: plane type (primary vs overlay) 1221 * 1222 * Legacy API to initialize a DRM plane. 1223 * 1224 * New drivers should call drm_universal_plane_init() instead. 1225 * 1226 * Returns: 1227 * Zero on success, error code on failure. 1228 */ 1229 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1230 unsigned long possible_crtcs, 1231 const struct drm_plane_funcs *funcs, 1232 const uint32_t *formats, unsigned int format_count, 1233 bool is_primary) 1234 { 1235 enum drm_plane_type type; 1236 1237 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1238 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1239 formats, format_count, type); 1240 } 1241 EXPORT_SYMBOL(drm_plane_init); 1242 1243 /** 1244 * drm_plane_cleanup - Clean up the core plane usage 1245 * @plane: plane to cleanup 1246 * 1247 * This function cleans up @plane and removes it from the DRM mode setting 1248 * core. Note that the function does *not* free the plane structure itself, 1249 * this is the responsibility of the caller. 1250 */ 1251 void drm_plane_cleanup(struct drm_plane *plane) 1252 { 1253 struct drm_device *dev = plane->dev; 1254 1255 drm_modeset_lock_all(dev); 1256 kfree(plane->format_types); 1257 drm_mode_object_put(dev, &plane->base); 1258 1259 BUG_ON(list_empty(&plane->head)); 1260 1261 list_del(&plane->head); 1262 dev->mode_config.num_total_plane--; 1263 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1264 dev->mode_config.num_overlay_plane--; 1265 drm_modeset_unlock_all(dev); 1266 1267 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1268 if (plane->state && plane->funcs->atomic_destroy_state) 1269 plane->funcs->atomic_destroy_state(plane, plane->state); 1270 1271 memset(plane, 0, sizeof(*plane)); 1272 } 1273 EXPORT_SYMBOL(drm_plane_cleanup); 1274 1275 /** 1276 * drm_plane_index - find the index of a registered plane 1277 * @plane: plane to find index for 1278 * 1279 * Given a registered plane, return the index of that CRTC within a DRM 1280 * device's list of planes. 1281 */ 1282 unsigned int drm_plane_index(struct drm_plane *plane) 1283 { 1284 unsigned int index = 0; 1285 struct drm_plane *tmp; 1286 1287 drm_for_each_plane(tmp, plane->dev) { 1288 if (tmp == plane) 1289 return index; 1290 1291 index++; 1292 } 1293 1294 BUG(); 1295 } 1296 EXPORT_SYMBOL(drm_plane_index); 1297 1298 /** 1299 * drm_plane_from_index - find the registered plane at an index 1300 * @dev: DRM device 1301 * @idx: index of registered plane to find for 1302 * 1303 * Given a plane index, return the registered plane from DRM device's 1304 * list of planes with matching index. 1305 */ 1306 struct drm_plane * 1307 drm_plane_from_index(struct drm_device *dev, int idx) 1308 { 1309 struct drm_plane *plane; 1310 unsigned int i = 0; 1311 1312 drm_for_each_plane(plane, dev) { 1313 if (i == idx) 1314 return plane; 1315 i++; 1316 } 1317 return NULL; 1318 } 1319 EXPORT_SYMBOL(drm_plane_from_index); 1320 1321 /** 1322 * drm_plane_force_disable - Forcibly disable a plane 1323 * @plane: plane to disable 1324 * 1325 * Forces the plane to be disabled. 1326 * 1327 * Used when the plane's current framebuffer is destroyed, 1328 * and when restoring fbdev mode. 1329 */ 1330 void drm_plane_force_disable(struct drm_plane *plane) 1331 { 1332 int ret; 1333 1334 if (!plane->fb) 1335 return; 1336 1337 plane->old_fb = plane->fb; 1338 ret = plane->funcs->disable_plane(plane); 1339 if (ret) { 1340 DRM_ERROR("failed to disable plane with busy fb\n"); 1341 plane->old_fb = NULL; 1342 return; 1343 } 1344 /* disconnect the plane from the fb and crtc: */ 1345 drm_framebuffer_unreference(plane->old_fb); 1346 plane->old_fb = NULL; 1347 plane->fb = NULL; 1348 plane->crtc = NULL; 1349 } 1350 EXPORT_SYMBOL(drm_plane_force_disable); 1351 1352 static int drm_mode_create_standard_properties(struct drm_device *dev) 1353 { 1354 struct drm_property *prop; 1355 1356 /* 1357 * Standard properties (apply to all connectors) 1358 */ 1359 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1360 DRM_MODE_PROP_IMMUTABLE, 1361 "EDID", 0); 1362 if (!prop) 1363 return -ENOMEM; 1364 dev->mode_config.edid_property = prop; 1365 1366 prop = drm_property_create_enum(dev, 0, 1367 "DPMS", drm_dpms_enum_list, 1368 ARRAY_SIZE(drm_dpms_enum_list)); 1369 if (!prop) 1370 return -ENOMEM; 1371 dev->mode_config.dpms_property = prop; 1372 1373 prop = drm_property_create(dev, 1374 DRM_MODE_PROP_BLOB | 1375 DRM_MODE_PROP_IMMUTABLE, 1376 "PATH", 0); 1377 if (!prop) 1378 return -ENOMEM; 1379 dev->mode_config.path_property = prop; 1380 1381 prop = drm_property_create(dev, 1382 DRM_MODE_PROP_BLOB | 1383 DRM_MODE_PROP_IMMUTABLE, 1384 "TILE", 0); 1385 if (!prop) 1386 return -ENOMEM; 1387 dev->mode_config.tile_property = prop; 1388 1389 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1390 "type", drm_plane_type_enum_list, 1391 ARRAY_SIZE(drm_plane_type_enum_list)); 1392 if (!prop) 1393 return -ENOMEM; 1394 dev->mode_config.plane_type_property = prop; 1395 1396 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1397 "SRC_X", 0, UINT_MAX); 1398 if (!prop) 1399 return -ENOMEM; 1400 dev->mode_config.prop_src_x = prop; 1401 1402 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1403 "SRC_Y", 0, UINT_MAX); 1404 if (!prop) 1405 return -ENOMEM; 1406 dev->mode_config.prop_src_y = prop; 1407 1408 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1409 "SRC_W", 0, UINT_MAX); 1410 if (!prop) 1411 return -ENOMEM; 1412 dev->mode_config.prop_src_w = prop; 1413 1414 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1415 "SRC_H", 0, UINT_MAX); 1416 if (!prop) 1417 return -ENOMEM; 1418 dev->mode_config.prop_src_h = prop; 1419 1420 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1421 "CRTC_X", INT_MIN, INT_MAX); 1422 if (!prop) 1423 return -ENOMEM; 1424 dev->mode_config.prop_crtc_x = prop; 1425 1426 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1427 "CRTC_Y", INT_MIN, INT_MAX); 1428 if (!prop) 1429 return -ENOMEM; 1430 dev->mode_config.prop_crtc_y = prop; 1431 1432 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1433 "CRTC_W", 0, INT_MAX); 1434 if (!prop) 1435 return -ENOMEM; 1436 dev->mode_config.prop_crtc_w = prop; 1437 1438 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1439 "CRTC_H", 0, INT_MAX); 1440 if (!prop) 1441 return -ENOMEM; 1442 dev->mode_config.prop_crtc_h = prop; 1443 1444 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1445 "FB_ID", DRM_MODE_OBJECT_FB); 1446 if (!prop) 1447 return -ENOMEM; 1448 dev->mode_config.prop_fb_id = prop; 1449 1450 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1451 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 1452 if (!prop) 1453 return -ENOMEM; 1454 dev->mode_config.prop_crtc_id = prop; 1455 1456 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 1457 "ACTIVE"); 1458 if (!prop) 1459 return -ENOMEM; 1460 dev->mode_config.prop_active = prop; 1461 1462 prop = drm_property_create(dev, 1463 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 1464 "MODE_ID", 0); 1465 if (!prop) 1466 return -ENOMEM; 1467 dev->mode_config.prop_mode_id = prop; 1468 1469 return 0; 1470 } 1471 1472 /** 1473 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1474 * @dev: DRM device 1475 * 1476 * Called by a driver the first time a DVI-I connector is made. 1477 */ 1478 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1479 { 1480 struct drm_property *dvi_i_selector; 1481 struct drm_property *dvi_i_subconnector; 1482 1483 if (dev->mode_config.dvi_i_select_subconnector_property) 1484 return 0; 1485 1486 dvi_i_selector = 1487 drm_property_create_enum(dev, 0, 1488 "select subconnector", 1489 drm_dvi_i_select_enum_list, 1490 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1491 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1492 1493 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1494 "subconnector", 1495 drm_dvi_i_subconnector_enum_list, 1496 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1497 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1498 1499 return 0; 1500 } 1501 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1502 1503 /** 1504 * drm_create_tv_properties - create TV specific connector properties 1505 * @dev: DRM device 1506 * @num_modes: number of different TV formats (modes) supported 1507 * @modes: array of pointers to strings containing name of each format 1508 * 1509 * Called by a driver's TV initialization routine, this function creates 1510 * the TV specific connector properties for a given device. Caller is 1511 * responsible for allocating a list of format names and passing them to 1512 * this routine. 1513 */ 1514 int drm_mode_create_tv_properties(struct drm_device *dev, 1515 unsigned int num_modes, 1516 const char * const modes[]) 1517 { 1518 struct drm_property *tv_selector; 1519 struct drm_property *tv_subconnector; 1520 unsigned int i; 1521 1522 if (dev->mode_config.tv_select_subconnector_property) 1523 return 0; 1524 1525 /* 1526 * Basic connector properties 1527 */ 1528 tv_selector = drm_property_create_enum(dev, 0, 1529 "select subconnector", 1530 drm_tv_select_enum_list, 1531 ARRAY_SIZE(drm_tv_select_enum_list)); 1532 if (!tv_selector) 1533 goto nomem; 1534 1535 dev->mode_config.tv_select_subconnector_property = tv_selector; 1536 1537 tv_subconnector = 1538 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1539 "subconnector", 1540 drm_tv_subconnector_enum_list, 1541 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1542 if (!tv_subconnector) 1543 goto nomem; 1544 dev->mode_config.tv_subconnector_property = tv_subconnector; 1545 1546 /* 1547 * Other, TV specific properties: margins & TV modes. 1548 */ 1549 dev->mode_config.tv_left_margin_property = 1550 drm_property_create_range(dev, 0, "left margin", 0, 100); 1551 if (!dev->mode_config.tv_left_margin_property) 1552 goto nomem; 1553 1554 dev->mode_config.tv_right_margin_property = 1555 drm_property_create_range(dev, 0, "right margin", 0, 100); 1556 if (!dev->mode_config.tv_right_margin_property) 1557 goto nomem; 1558 1559 dev->mode_config.tv_top_margin_property = 1560 drm_property_create_range(dev, 0, "top margin", 0, 100); 1561 if (!dev->mode_config.tv_top_margin_property) 1562 goto nomem; 1563 1564 dev->mode_config.tv_bottom_margin_property = 1565 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1566 if (!dev->mode_config.tv_bottom_margin_property) 1567 goto nomem; 1568 1569 dev->mode_config.tv_mode_property = 1570 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1571 "mode", num_modes); 1572 if (!dev->mode_config.tv_mode_property) 1573 goto nomem; 1574 1575 for (i = 0; i < num_modes; i++) 1576 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1577 i, modes[i]); 1578 1579 dev->mode_config.tv_brightness_property = 1580 drm_property_create_range(dev, 0, "brightness", 0, 100); 1581 if (!dev->mode_config.tv_brightness_property) 1582 goto nomem; 1583 1584 dev->mode_config.tv_contrast_property = 1585 drm_property_create_range(dev, 0, "contrast", 0, 100); 1586 if (!dev->mode_config.tv_contrast_property) 1587 goto nomem; 1588 1589 dev->mode_config.tv_flicker_reduction_property = 1590 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1591 if (!dev->mode_config.tv_flicker_reduction_property) 1592 goto nomem; 1593 1594 dev->mode_config.tv_overscan_property = 1595 drm_property_create_range(dev, 0, "overscan", 0, 100); 1596 if (!dev->mode_config.tv_overscan_property) 1597 goto nomem; 1598 1599 dev->mode_config.tv_saturation_property = 1600 drm_property_create_range(dev, 0, "saturation", 0, 100); 1601 if (!dev->mode_config.tv_saturation_property) 1602 goto nomem; 1603 1604 dev->mode_config.tv_hue_property = 1605 drm_property_create_range(dev, 0, "hue", 0, 100); 1606 if (!dev->mode_config.tv_hue_property) 1607 goto nomem; 1608 1609 return 0; 1610 nomem: 1611 return -ENOMEM; 1612 } 1613 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1614 1615 /** 1616 * drm_mode_create_scaling_mode_property - create scaling mode property 1617 * @dev: DRM device 1618 * 1619 * Called by a driver the first time it's needed, must be attached to desired 1620 * connectors. 1621 */ 1622 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1623 { 1624 struct drm_property *scaling_mode; 1625 1626 if (dev->mode_config.scaling_mode_property) 1627 return 0; 1628 1629 scaling_mode = 1630 drm_property_create_enum(dev, 0, "scaling mode", 1631 drm_scaling_mode_enum_list, 1632 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1633 1634 dev->mode_config.scaling_mode_property = scaling_mode; 1635 1636 return 0; 1637 } 1638 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1639 1640 /** 1641 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1642 * @dev: DRM device 1643 * 1644 * Called by a driver the first time it's needed, must be attached to desired 1645 * connectors. 1646 * 1647 * Returns: 1648 * Zero on success, negative errno on failure. 1649 */ 1650 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1651 { 1652 if (dev->mode_config.aspect_ratio_property) 1653 return 0; 1654 1655 dev->mode_config.aspect_ratio_property = 1656 drm_property_create_enum(dev, 0, "aspect ratio", 1657 drm_aspect_ratio_enum_list, 1658 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1659 1660 if (dev->mode_config.aspect_ratio_property == NULL) 1661 return -ENOMEM; 1662 1663 return 0; 1664 } 1665 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1666 1667 /** 1668 * drm_mode_create_dirty_property - create dirty property 1669 * @dev: DRM device 1670 * 1671 * Called by a driver the first time it's needed, must be attached to desired 1672 * connectors. 1673 */ 1674 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1675 { 1676 struct drm_property *dirty_info; 1677 1678 if (dev->mode_config.dirty_info_property) 1679 return 0; 1680 1681 dirty_info = 1682 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1683 "dirty", 1684 drm_dirty_info_enum_list, 1685 ARRAY_SIZE(drm_dirty_info_enum_list)); 1686 dev->mode_config.dirty_info_property = dirty_info; 1687 1688 return 0; 1689 } 1690 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1691 1692 /** 1693 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1694 * @dev: DRM device 1695 * 1696 * Create the the suggested x/y offset property for connectors. 1697 */ 1698 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1699 { 1700 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1701 return 0; 1702 1703 dev->mode_config.suggested_x_property = 1704 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1705 1706 dev->mode_config.suggested_y_property = 1707 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1708 1709 if (dev->mode_config.suggested_x_property == NULL || 1710 dev->mode_config.suggested_y_property == NULL) 1711 return -ENOMEM; 1712 return 0; 1713 } 1714 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1715 1716 /** 1717 * drm_mode_getresources - get graphics configuration 1718 * @dev: drm device for the ioctl 1719 * @data: data pointer for the ioctl 1720 * @file_priv: drm file for the ioctl call 1721 * 1722 * Construct a set of configuration description structures and return 1723 * them to the user, including CRTC, connector and framebuffer configuration. 1724 * 1725 * Called by the user via ioctl. 1726 * 1727 * Returns: 1728 * Zero on success, negative errno on failure. 1729 */ 1730 int drm_mode_getresources(struct drm_device *dev, void *data, 1731 struct drm_file *file_priv) 1732 { 1733 struct drm_mode_card_res *card_res = data; 1734 struct list_head *lh; 1735 struct drm_framebuffer *fb; 1736 struct drm_connector *connector; 1737 struct drm_crtc *crtc; 1738 struct drm_encoder *encoder; 1739 int ret = 0; 1740 int connector_count = 0; 1741 int crtc_count = 0; 1742 int fb_count = 0; 1743 int encoder_count = 0; 1744 int copied = 0; 1745 uint32_t __user *fb_id; 1746 uint32_t __user *crtc_id; 1747 uint32_t __user *connector_id; 1748 uint32_t __user *encoder_id; 1749 1750 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1751 return -EINVAL; 1752 1753 1754 mutex_lock(&file_priv->fbs_lock); 1755 /* 1756 * For the non-control nodes we need to limit the list of resources 1757 * by IDs in the group list for this node 1758 */ 1759 list_for_each(lh, &file_priv->fbs) 1760 fb_count++; 1761 1762 /* handle this in 4 parts */ 1763 /* FBs */ 1764 if (card_res->count_fbs >= fb_count) { 1765 copied = 0; 1766 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1767 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1768 if (put_user(fb->base.id, fb_id + copied)) { 1769 mutex_unlock(&file_priv->fbs_lock); 1770 return -EFAULT; 1771 } 1772 copied++; 1773 } 1774 } 1775 card_res->count_fbs = fb_count; 1776 mutex_unlock(&file_priv->fbs_lock); 1777 1778 /* mode_config.mutex protects the connector list against e.g. DP MST 1779 * connector hot-adding. CRTC/Plane lists are invariant. */ 1780 mutex_lock(&dev->mode_config.mutex); 1781 drm_for_each_crtc(crtc, dev) 1782 crtc_count++; 1783 1784 drm_for_each_connector(connector, dev) 1785 connector_count++; 1786 1787 drm_for_each_encoder(encoder, dev) 1788 encoder_count++; 1789 1790 card_res->max_height = dev->mode_config.max_height; 1791 card_res->min_height = dev->mode_config.min_height; 1792 card_res->max_width = dev->mode_config.max_width; 1793 card_res->min_width = dev->mode_config.min_width; 1794 1795 /* CRTCs */ 1796 if (card_res->count_crtcs >= crtc_count) { 1797 copied = 0; 1798 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1799 drm_for_each_crtc(crtc, dev) { 1800 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 1801 if (put_user(crtc->base.id, crtc_id + copied)) { 1802 ret = -EFAULT; 1803 goto out; 1804 } 1805 copied++; 1806 } 1807 } 1808 card_res->count_crtcs = crtc_count; 1809 1810 /* Encoders */ 1811 if (card_res->count_encoders >= encoder_count) { 1812 copied = 0; 1813 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1814 drm_for_each_encoder(encoder, dev) { 1815 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1816 encoder->name); 1817 if (put_user(encoder->base.id, encoder_id + 1818 copied)) { 1819 ret = -EFAULT; 1820 goto out; 1821 } 1822 copied++; 1823 } 1824 } 1825 card_res->count_encoders = encoder_count; 1826 1827 /* Connectors */ 1828 if (card_res->count_connectors >= connector_count) { 1829 copied = 0; 1830 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1831 drm_for_each_connector(connector, dev) { 1832 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1833 connector->base.id, 1834 connector->name); 1835 if (put_user(connector->base.id, 1836 connector_id + copied)) { 1837 ret = -EFAULT; 1838 goto out; 1839 } 1840 copied++; 1841 } 1842 } 1843 card_res->count_connectors = connector_count; 1844 1845 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1846 card_res->count_connectors, card_res->count_encoders); 1847 1848 out: 1849 mutex_unlock(&dev->mode_config.mutex); 1850 return ret; 1851 } 1852 1853 /** 1854 * drm_mode_getcrtc - get CRTC configuration 1855 * @dev: drm device for the ioctl 1856 * @data: data pointer for the ioctl 1857 * @file_priv: drm file for the ioctl call 1858 * 1859 * Construct a CRTC configuration structure to return to the user. 1860 * 1861 * Called by the user via ioctl. 1862 * 1863 * Returns: 1864 * Zero on success, negative errno on failure. 1865 */ 1866 int drm_mode_getcrtc(struct drm_device *dev, 1867 void *data, struct drm_file *file_priv) 1868 { 1869 struct drm_mode_crtc *crtc_resp = data; 1870 struct drm_crtc *crtc; 1871 1872 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1873 return -EINVAL; 1874 1875 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 1876 if (!crtc) 1877 return -ENOENT; 1878 1879 drm_modeset_lock_crtc(crtc, crtc->primary); 1880 crtc_resp->gamma_size = crtc->gamma_size; 1881 if (crtc->primary->fb) 1882 crtc_resp->fb_id = crtc->primary->fb->base.id; 1883 else 1884 crtc_resp->fb_id = 0; 1885 1886 if (crtc->state) { 1887 crtc_resp->x = crtc->primary->state->src_x >> 16; 1888 crtc_resp->y = crtc->primary->state->src_y >> 16; 1889 if (crtc->state->enable) { 1890 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); 1891 crtc_resp->mode_valid = 1; 1892 1893 } else { 1894 crtc_resp->mode_valid = 0; 1895 } 1896 } else { 1897 crtc_resp->x = crtc->x; 1898 crtc_resp->y = crtc->y; 1899 if (crtc->enabled) { 1900 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); 1901 crtc_resp->mode_valid = 1; 1902 1903 } else { 1904 crtc_resp->mode_valid = 0; 1905 } 1906 } 1907 drm_modeset_unlock_crtc(crtc); 1908 1909 return 0; 1910 } 1911 1912 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 1913 const struct drm_file *file_priv) 1914 { 1915 /* 1916 * If user-space hasn't configured the driver to expose the stereo 3D 1917 * modes, don't expose them. 1918 */ 1919 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 1920 return false; 1921 1922 return true; 1923 } 1924 1925 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 1926 { 1927 /* For atomic drivers only state objects are synchronously updated and 1928 * protected by modeset locks, so check those first. */ 1929 if (connector->state) 1930 return connector->state->best_encoder; 1931 return connector->encoder; 1932 } 1933 1934 /* helper for getconnector and getproperties ioctls */ 1935 static int get_properties(struct drm_mode_object *obj, bool atomic, 1936 uint32_t __user *prop_ptr, uint64_t __user *prop_values, 1937 uint32_t *arg_count_props) 1938 { 1939 int props_count; 1940 int i, ret, copied; 1941 1942 props_count = obj->properties->count; 1943 if (!atomic) 1944 props_count -= obj->properties->atomic_count; 1945 1946 if ((*arg_count_props >= props_count) && props_count) { 1947 for (i = 0, copied = 0; copied < props_count; i++) { 1948 struct drm_property *prop = obj->properties->properties[i]; 1949 uint64_t val; 1950 1951 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) 1952 continue; 1953 1954 ret = drm_object_property_get_value(obj, prop, &val); 1955 if (ret) 1956 return ret; 1957 1958 if (put_user(prop->base.id, prop_ptr + copied)) 1959 return -EFAULT; 1960 1961 if (put_user(val, prop_values + copied)) 1962 return -EFAULT; 1963 1964 copied++; 1965 } 1966 } 1967 *arg_count_props = props_count; 1968 1969 return 0; 1970 } 1971 1972 /** 1973 * drm_mode_getconnector - get connector configuration 1974 * @dev: drm device for the ioctl 1975 * @data: data pointer for the ioctl 1976 * @file_priv: drm file for the ioctl call 1977 * 1978 * Construct a connector configuration structure to return to the user. 1979 * 1980 * Called by the user via ioctl. 1981 * 1982 * Returns: 1983 * Zero on success, negative errno on failure. 1984 */ 1985 int drm_mode_getconnector(struct drm_device *dev, void *data, 1986 struct drm_file *file_priv) 1987 { 1988 struct drm_mode_get_connector *out_resp = data; 1989 struct drm_connector *connector; 1990 struct drm_encoder *encoder; 1991 struct drm_display_mode *mode; 1992 int mode_count = 0; 1993 int encoders_count = 0; 1994 int ret = 0; 1995 int copied = 0; 1996 int i; 1997 struct drm_mode_modeinfo u_mode; 1998 struct drm_mode_modeinfo __user *mode_ptr; 1999 uint32_t __user *encoder_ptr; 2000 2001 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2002 return -EINVAL; 2003 2004 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2005 2006 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 2007 2008 mutex_lock(&dev->mode_config.mutex); 2009 2010 connector = drm_connector_find(dev, out_resp->connector_id); 2011 if (!connector) { 2012 ret = -ENOENT; 2013 goto out_unlock; 2014 } 2015 2016 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) 2017 if (connector->encoder_ids[i] != 0) 2018 encoders_count++; 2019 2020 if (out_resp->count_modes == 0) { 2021 connector->funcs->fill_modes(connector, 2022 dev->mode_config.max_width, 2023 dev->mode_config.max_height); 2024 } 2025 2026 /* delayed so we get modes regardless of pre-fill_modes state */ 2027 list_for_each_entry(mode, &connector->modes, head) 2028 if (drm_mode_expose_to_userspace(mode, file_priv)) 2029 mode_count++; 2030 2031 out_resp->connector_id = connector->base.id; 2032 out_resp->connector_type = connector->connector_type; 2033 out_resp->connector_type_id = connector->connector_type_id; 2034 out_resp->mm_width = connector->display_info.width_mm; 2035 out_resp->mm_height = connector->display_info.height_mm; 2036 out_resp->subpixel = connector->display_info.subpixel_order; 2037 out_resp->connection = connector->status; 2038 2039 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2040 encoder = drm_connector_get_encoder(connector); 2041 if (encoder) 2042 out_resp->encoder_id = encoder->base.id; 2043 else 2044 out_resp->encoder_id = 0; 2045 2046 /* 2047 * This ioctl is called twice, once to determine how much space is 2048 * needed, and the 2nd time to fill it. 2049 */ 2050 if ((out_resp->count_modes >= mode_count) && mode_count) { 2051 copied = 0; 2052 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2053 list_for_each_entry(mode, &connector->modes, head) { 2054 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2055 continue; 2056 2057 drm_mode_convert_to_umode(&u_mode, mode); 2058 if (copy_to_user(mode_ptr + copied, 2059 &u_mode, sizeof(u_mode))) { 2060 ret = -EFAULT; 2061 goto out; 2062 } 2063 copied++; 2064 } 2065 } 2066 out_resp->count_modes = mode_count; 2067 2068 ret = get_properties(&connector->base, file_priv->atomic, 2069 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2070 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2071 &out_resp->count_props); 2072 if (ret) 2073 goto out; 2074 2075 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2076 copied = 0; 2077 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2078 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2079 if (connector->encoder_ids[i] != 0) { 2080 if (put_user(connector->encoder_ids[i], 2081 encoder_ptr + copied)) { 2082 ret = -EFAULT; 2083 goto out; 2084 } 2085 copied++; 2086 } 2087 } 2088 } 2089 out_resp->count_encoders = encoders_count; 2090 2091 out: 2092 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2093 2094 out_unlock: 2095 mutex_unlock(&dev->mode_config.mutex); 2096 2097 return ret; 2098 } 2099 2100 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2101 { 2102 struct drm_connector *connector; 2103 struct drm_device *dev = encoder->dev; 2104 bool uses_atomic = false; 2105 2106 /* For atomic drivers only state objects are synchronously updated and 2107 * protected by modeset locks, so check those first. */ 2108 drm_for_each_connector(connector, dev) { 2109 if (!connector->state) 2110 continue; 2111 2112 uses_atomic = true; 2113 2114 if (connector->state->best_encoder != encoder) 2115 continue; 2116 2117 return connector->state->crtc; 2118 } 2119 2120 /* Don't return stale data (e.g. pending async disable). */ 2121 if (uses_atomic) 2122 return NULL; 2123 2124 return encoder->crtc; 2125 } 2126 2127 /** 2128 * drm_mode_getencoder - get encoder configuration 2129 * @dev: drm device for the ioctl 2130 * @data: data pointer for the ioctl 2131 * @file_priv: drm file for the ioctl call 2132 * 2133 * Construct a encoder configuration structure to return to the user. 2134 * 2135 * Called by the user via ioctl. 2136 * 2137 * Returns: 2138 * Zero on success, negative errno on failure. 2139 */ 2140 int drm_mode_getencoder(struct drm_device *dev, void *data, 2141 struct drm_file *file_priv) 2142 { 2143 struct drm_mode_get_encoder *enc_resp = data; 2144 struct drm_encoder *encoder; 2145 struct drm_crtc *crtc; 2146 2147 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2148 return -EINVAL; 2149 2150 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2151 if (!encoder) 2152 return -ENOENT; 2153 2154 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2155 crtc = drm_encoder_get_crtc(encoder); 2156 if (crtc) 2157 enc_resp->crtc_id = crtc->base.id; 2158 else 2159 enc_resp->crtc_id = 0; 2160 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2161 2162 enc_resp->encoder_type = encoder->encoder_type; 2163 enc_resp->encoder_id = encoder->base.id; 2164 enc_resp->possible_crtcs = encoder->possible_crtcs; 2165 enc_resp->possible_clones = encoder->possible_clones; 2166 2167 return 0; 2168 } 2169 2170 /** 2171 * drm_mode_getplane_res - enumerate all plane resources 2172 * @dev: DRM device 2173 * @data: ioctl data 2174 * @file_priv: DRM file info 2175 * 2176 * Construct a list of plane ids to return to the user. 2177 * 2178 * Called by the user via ioctl. 2179 * 2180 * Returns: 2181 * Zero on success, negative errno on failure. 2182 */ 2183 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2184 struct drm_file *file_priv) 2185 { 2186 struct drm_mode_get_plane_res *plane_resp = data; 2187 struct drm_mode_config *config; 2188 struct drm_plane *plane; 2189 uint32_t __user *plane_ptr; 2190 int copied = 0; 2191 unsigned num_planes; 2192 2193 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2194 return -EINVAL; 2195 2196 config = &dev->mode_config; 2197 2198 if (file_priv->universal_planes) 2199 num_planes = config->num_total_plane; 2200 else 2201 num_planes = config->num_overlay_plane; 2202 2203 /* 2204 * This ioctl is called twice, once to determine how much space is 2205 * needed, and the 2nd time to fill it. 2206 */ 2207 if (num_planes && 2208 (plane_resp->count_planes >= num_planes)) { 2209 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2210 2211 /* Plane lists are invariant, no locking needed. */ 2212 drm_for_each_plane(plane, dev) { 2213 /* 2214 * Unless userspace set the 'universal planes' 2215 * capability bit, only advertise overlays. 2216 */ 2217 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2218 !file_priv->universal_planes) 2219 continue; 2220 2221 if (put_user(plane->base.id, plane_ptr + copied)) 2222 return -EFAULT; 2223 copied++; 2224 } 2225 } 2226 plane_resp->count_planes = num_planes; 2227 2228 return 0; 2229 } 2230 2231 /** 2232 * drm_mode_getplane - get plane configuration 2233 * @dev: DRM device 2234 * @data: ioctl data 2235 * @file_priv: DRM file info 2236 * 2237 * Construct a plane configuration structure to return to the user. 2238 * 2239 * Called by the user via ioctl. 2240 * 2241 * Returns: 2242 * Zero on success, negative errno on failure. 2243 */ 2244 int drm_mode_getplane(struct drm_device *dev, void *data, 2245 struct drm_file *file_priv) 2246 { 2247 struct drm_mode_get_plane *plane_resp = data; 2248 struct drm_plane *plane; 2249 uint32_t __user *format_ptr; 2250 2251 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2252 return -EINVAL; 2253 2254 plane = drm_plane_find(dev, plane_resp->plane_id); 2255 if (!plane) 2256 return -ENOENT; 2257 2258 drm_modeset_lock(&plane->mutex, NULL); 2259 if (plane->crtc) 2260 plane_resp->crtc_id = plane->crtc->base.id; 2261 else 2262 plane_resp->crtc_id = 0; 2263 2264 if (plane->fb) 2265 plane_resp->fb_id = plane->fb->base.id; 2266 else 2267 plane_resp->fb_id = 0; 2268 drm_modeset_unlock(&plane->mutex); 2269 2270 plane_resp->plane_id = plane->base.id; 2271 plane_resp->possible_crtcs = plane->possible_crtcs; 2272 plane_resp->gamma_size = 0; 2273 2274 /* 2275 * This ioctl is called twice, once to determine how much space is 2276 * needed, and the 2nd time to fill it. 2277 */ 2278 if (plane->format_count && 2279 (plane_resp->count_format_types >= plane->format_count)) { 2280 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2281 if (copy_to_user(format_ptr, 2282 plane->format_types, 2283 sizeof(uint32_t) * plane->format_count)) { 2284 return -EFAULT; 2285 } 2286 } 2287 plane_resp->count_format_types = plane->format_count; 2288 2289 return 0; 2290 } 2291 2292 /** 2293 * drm_plane_check_pixel_format - Check if the plane supports the pixel format 2294 * @plane: plane to check for format support 2295 * @format: the pixel format 2296 * 2297 * Returns: 2298 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL 2299 * otherwise. 2300 */ 2301 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format) 2302 { 2303 unsigned int i; 2304 2305 for (i = 0; i < plane->format_count; i++) { 2306 if (format == plane->format_types[i]) 2307 return 0; 2308 } 2309 2310 return -EINVAL; 2311 } 2312 2313 static int check_src_coords(uint32_t src_x, uint32_t src_y, 2314 uint32_t src_w, uint32_t src_h, 2315 const struct drm_framebuffer *fb) 2316 { 2317 unsigned int fb_width, fb_height; 2318 2319 fb_width = fb->width << 16; 2320 fb_height = fb->height << 16; 2321 2322 /* Make sure source coordinates are inside the fb. */ 2323 if (src_w > fb_width || 2324 src_x > fb_width - src_w || 2325 src_h > fb_height || 2326 src_y > fb_height - src_h) { 2327 DRM_DEBUG_KMS("Invalid source coordinates " 2328 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2329 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2330 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2331 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2332 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2333 return -ENOSPC; 2334 } 2335 2336 return 0; 2337 } 2338 2339 /* 2340 * setplane_internal - setplane handler for internal callers 2341 * 2342 * Note that we assume an extra reference has already been taken on fb. If the 2343 * update fails, this reference will be dropped before return; if it succeeds, 2344 * the previous framebuffer (if any) will be unreferenced instead. 2345 * 2346 * src_{x,y,w,h} are provided in 16.16 fixed point format 2347 */ 2348 static int __setplane_internal(struct drm_plane *plane, 2349 struct drm_crtc *crtc, 2350 struct drm_framebuffer *fb, 2351 int32_t crtc_x, int32_t crtc_y, 2352 uint32_t crtc_w, uint32_t crtc_h, 2353 /* src_{x,y,w,h} values are 16.16 fixed point */ 2354 uint32_t src_x, uint32_t src_y, 2355 uint32_t src_w, uint32_t src_h) 2356 { 2357 int ret = 0; 2358 2359 /* No fb means shut it down */ 2360 if (!fb) { 2361 plane->old_fb = plane->fb; 2362 ret = plane->funcs->disable_plane(plane); 2363 if (!ret) { 2364 plane->crtc = NULL; 2365 plane->fb = NULL; 2366 } else { 2367 plane->old_fb = NULL; 2368 } 2369 goto out; 2370 } 2371 2372 /* Check whether this plane is usable on this CRTC */ 2373 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2374 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2375 ret = -EINVAL; 2376 goto out; 2377 } 2378 2379 /* Check whether this plane supports the fb pixel format. */ 2380 ret = drm_plane_check_pixel_format(plane, fb->pixel_format); 2381 if (ret) { 2382 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2383 drm_get_format_name(fb->pixel_format)); 2384 goto out; 2385 } 2386 2387 /* Give drivers some help against integer overflows */ 2388 if (crtc_w > INT_MAX || 2389 crtc_x > INT_MAX - (int32_t) crtc_w || 2390 crtc_h > INT_MAX || 2391 crtc_y > INT_MAX - (int32_t) crtc_h) { 2392 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2393 crtc_w, crtc_h, crtc_x, crtc_y); 2394 ret = -ERANGE; 2395 goto out; 2396 } 2397 2398 ret = check_src_coords(src_x, src_y, src_w, src_h, fb); 2399 if (ret) 2400 goto out; 2401 2402 plane->old_fb = plane->fb; 2403 ret = plane->funcs->update_plane(plane, crtc, fb, 2404 crtc_x, crtc_y, crtc_w, crtc_h, 2405 src_x, src_y, src_w, src_h); 2406 if (!ret) { 2407 plane->crtc = crtc; 2408 plane->fb = fb; 2409 fb = NULL; 2410 } else { 2411 plane->old_fb = NULL; 2412 } 2413 2414 out: 2415 if (fb) 2416 drm_framebuffer_unreference(fb); 2417 if (plane->old_fb) 2418 drm_framebuffer_unreference(plane->old_fb); 2419 plane->old_fb = NULL; 2420 2421 return ret; 2422 } 2423 2424 static int setplane_internal(struct drm_plane *plane, 2425 struct drm_crtc *crtc, 2426 struct drm_framebuffer *fb, 2427 int32_t crtc_x, int32_t crtc_y, 2428 uint32_t crtc_w, uint32_t crtc_h, 2429 /* src_{x,y,w,h} values are 16.16 fixed point */ 2430 uint32_t src_x, uint32_t src_y, 2431 uint32_t src_w, uint32_t src_h) 2432 { 2433 int ret; 2434 2435 drm_modeset_lock_all(plane->dev); 2436 ret = __setplane_internal(plane, crtc, fb, 2437 crtc_x, crtc_y, crtc_w, crtc_h, 2438 src_x, src_y, src_w, src_h); 2439 drm_modeset_unlock_all(plane->dev); 2440 2441 return ret; 2442 } 2443 2444 /** 2445 * drm_mode_setplane - configure a plane's configuration 2446 * @dev: DRM device 2447 * @data: ioctl data* 2448 * @file_priv: DRM file info 2449 * 2450 * Set plane configuration, including placement, fb, scaling, and other factors. 2451 * Or pass a NULL fb to disable (planes may be disabled without providing a 2452 * valid crtc). 2453 * 2454 * Returns: 2455 * Zero on success, negative errno on failure. 2456 */ 2457 int drm_mode_setplane(struct drm_device *dev, void *data, 2458 struct drm_file *file_priv) 2459 { 2460 struct drm_mode_set_plane *plane_req = data; 2461 struct drm_plane *plane; 2462 struct drm_crtc *crtc = NULL; 2463 struct drm_framebuffer *fb = NULL; 2464 2465 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2466 return -EINVAL; 2467 2468 /* 2469 * First, find the plane, crtc, and fb objects. If not available, 2470 * we don't bother to call the driver. 2471 */ 2472 plane = drm_plane_find(dev, plane_req->plane_id); 2473 if (!plane) { 2474 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2475 plane_req->plane_id); 2476 return -ENOENT; 2477 } 2478 2479 if (plane_req->fb_id) { 2480 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2481 if (!fb) { 2482 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2483 plane_req->fb_id); 2484 return -ENOENT; 2485 } 2486 2487 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2488 if (!crtc) { 2489 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2490 plane_req->crtc_id); 2491 return -ENOENT; 2492 } 2493 } 2494 2495 /* 2496 * setplane_internal will take care of deref'ing either the old or new 2497 * framebuffer depending on success. 2498 */ 2499 return setplane_internal(plane, crtc, fb, 2500 plane_req->crtc_x, plane_req->crtc_y, 2501 plane_req->crtc_w, plane_req->crtc_h, 2502 plane_req->src_x, plane_req->src_y, 2503 plane_req->src_w, plane_req->src_h); 2504 } 2505 2506 /** 2507 * drm_mode_set_config_internal - helper to call ->set_config 2508 * @set: modeset config to set 2509 * 2510 * This is a little helper to wrap internal calls to the ->set_config driver 2511 * interface. The only thing it adds is correct refcounting dance. 2512 * 2513 * Returns: 2514 * Zero on success, negative errno on failure. 2515 */ 2516 int drm_mode_set_config_internal(struct drm_mode_set *set) 2517 { 2518 struct drm_crtc *crtc = set->crtc; 2519 struct drm_framebuffer *fb; 2520 struct drm_crtc *tmp; 2521 int ret; 2522 2523 /* 2524 * NOTE: ->set_config can also disable other crtcs (if we steal all 2525 * connectors from it), hence we need to refcount the fbs across all 2526 * crtcs. Atomic modeset will have saner semantics ... 2527 */ 2528 drm_for_each_crtc(tmp, crtc->dev) 2529 tmp->primary->old_fb = tmp->primary->fb; 2530 2531 fb = set->fb; 2532 2533 ret = crtc->funcs->set_config(set); 2534 if (ret == 0) { 2535 crtc->primary->crtc = crtc; 2536 crtc->primary->fb = fb; 2537 } 2538 2539 drm_for_each_crtc(tmp, crtc->dev) { 2540 if (tmp->primary->fb) 2541 drm_framebuffer_reference(tmp->primary->fb); 2542 if (tmp->primary->old_fb) 2543 drm_framebuffer_unreference(tmp->primary->old_fb); 2544 tmp->primary->old_fb = NULL; 2545 } 2546 2547 return ret; 2548 } 2549 EXPORT_SYMBOL(drm_mode_set_config_internal); 2550 2551 /** 2552 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode 2553 * @mode: mode to query 2554 * @hdisplay: hdisplay value to fill in 2555 * @vdisplay: vdisplay value to fill in 2556 * 2557 * The vdisplay value will be doubled if the specified mode is a stereo mode of 2558 * the appropriate layout. 2559 */ 2560 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, 2561 int *hdisplay, int *vdisplay) 2562 { 2563 struct drm_display_mode adjusted; 2564 2565 drm_mode_copy(&adjusted, mode); 2566 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 2567 *hdisplay = adjusted.crtc_hdisplay; 2568 *vdisplay = adjusted.crtc_vdisplay; 2569 } 2570 EXPORT_SYMBOL(drm_crtc_get_hv_timing); 2571 2572 /** 2573 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2574 * CRTC viewport 2575 * @crtc: CRTC that framebuffer will be displayed on 2576 * @x: x panning 2577 * @y: y panning 2578 * @mode: mode that framebuffer will be displayed under 2579 * @fb: framebuffer to check size of 2580 */ 2581 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2582 int x, int y, 2583 const struct drm_display_mode *mode, 2584 const struct drm_framebuffer *fb) 2585 2586 { 2587 int hdisplay, vdisplay; 2588 2589 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); 2590 2591 if (crtc->state && 2592 crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) | 2593 BIT(DRM_ROTATE_270))) 2594 swap(hdisplay, vdisplay); 2595 2596 return check_src_coords(x << 16, y << 16, 2597 hdisplay << 16, vdisplay << 16, fb); 2598 } 2599 EXPORT_SYMBOL(drm_crtc_check_viewport); 2600 2601 /** 2602 * drm_mode_setcrtc - set CRTC configuration 2603 * @dev: drm device for the ioctl 2604 * @data: data pointer for the ioctl 2605 * @file_priv: drm file for the ioctl call 2606 * 2607 * Build a new CRTC configuration based on user request. 2608 * 2609 * Called by the user via ioctl. 2610 * 2611 * Returns: 2612 * Zero on success, negative errno on failure. 2613 */ 2614 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2615 struct drm_file *file_priv) 2616 { 2617 struct drm_mode_config *config = &dev->mode_config; 2618 struct drm_mode_crtc *crtc_req = data; 2619 struct drm_crtc *crtc; 2620 struct drm_connector **connector_set = NULL, *connector; 2621 struct drm_framebuffer *fb = NULL; 2622 struct drm_display_mode *mode = NULL; 2623 struct drm_mode_set set; 2624 uint32_t __user *set_connectors_ptr; 2625 int ret; 2626 int i; 2627 2628 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2629 return -EINVAL; 2630 2631 /* 2632 * Universal plane src offsets are only 16.16, prevent havoc for 2633 * drivers using universal plane code internally. 2634 */ 2635 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) 2636 return -ERANGE; 2637 2638 drm_modeset_lock_all(dev); 2639 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2640 if (!crtc) { 2641 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2642 ret = -ENOENT; 2643 goto out; 2644 } 2645 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 2646 2647 if (crtc_req->mode_valid) { 2648 /* If we have a mode we need a framebuffer. */ 2649 /* If we pass -1, set the mode with the currently bound fb */ 2650 if (crtc_req->fb_id == -1) { 2651 if (!crtc->primary->fb) { 2652 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2653 ret = -EINVAL; 2654 goto out; 2655 } 2656 fb = crtc->primary->fb; 2657 /* Make refcounting symmetric with the lookup path. */ 2658 drm_framebuffer_reference(fb); 2659 } else { 2660 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2661 if (!fb) { 2662 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2663 crtc_req->fb_id); 2664 ret = -ENOENT; 2665 goto out; 2666 } 2667 } 2668 2669 mode = drm_mode_create(dev); 2670 if (!mode) { 2671 ret = -ENOMEM; 2672 goto out; 2673 } 2674 2675 ret = drm_mode_convert_umode(mode, &crtc_req->mode); 2676 if (ret) { 2677 DRM_DEBUG_KMS("Invalid mode\n"); 2678 goto out; 2679 } 2680 2681 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 2682 2683 /* 2684 * Check whether the primary plane supports the fb pixel format. 2685 * Drivers not implementing the universal planes API use a 2686 * default formats list provided by the DRM core which doesn't 2687 * match real hardware capabilities. Skip the check in that 2688 * case. 2689 */ 2690 if (!crtc->primary->format_default) { 2691 ret = drm_plane_check_pixel_format(crtc->primary, 2692 fb->pixel_format); 2693 if (ret) { 2694 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2695 drm_get_format_name(fb->pixel_format)); 2696 goto out; 2697 } 2698 } 2699 2700 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2701 mode, fb); 2702 if (ret) 2703 goto out; 2704 2705 } 2706 2707 if (crtc_req->count_connectors == 0 && mode) { 2708 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2709 ret = -EINVAL; 2710 goto out; 2711 } 2712 2713 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2714 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2715 crtc_req->count_connectors); 2716 ret = -EINVAL; 2717 goto out; 2718 } 2719 2720 if (crtc_req->count_connectors > 0) { 2721 u32 out_id; 2722 2723 /* Avoid unbounded kernel memory allocation */ 2724 if (crtc_req->count_connectors > config->num_connector) { 2725 ret = -EINVAL; 2726 goto out; 2727 } 2728 2729 connector_set = kmalloc(crtc_req->count_connectors * 2730 sizeof(struct drm_connector *), 2731 M_DRM, M_WAITOK); 2732 if (!connector_set) { 2733 ret = -ENOMEM; 2734 goto out; 2735 } 2736 2737 for (i = 0; i < crtc_req->count_connectors; i++) { 2738 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2739 if (get_user(out_id, &set_connectors_ptr[i])) { 2740 ret = -EFAULT; 2741 goto out; 2742 } 2743 2744 connector = drm_connector_find(dev, out_id); 2745 if (!connector) { 2746 DRM_DEBUG_KMS("Connector id %d unknown\n", 2747 out_id); 2748 ret = -ENOENT; 2749 goto out; 2750 } 2751 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2752 connector->base.id, 2753 connector->name); 2754 2755 connector_set[i] = connector; 2756 } 2757 } 2758 2759 set.crtc = crtc; 2760 set.x = crtc_req->x; 2761 set.y = crtc_req->y; 2762 set.mode = mode; 2763 set.connectors = connector_set; 2764 set.num_connectors = crtc_req->count_connectors; 2765 set.fb = fb; 2766 ret = drm_mode_set_config_internal(&set); 2767 2768 out: 2769 if (fb) 2770 drm_framebuffer_unreference(fb); 2771 2772 kfree(connector_set); 2773 drm_mode_destroy(dev, mode); 2774 drm_modeset_unlock_all(dev); 2775 return ret; 2776 } 2777 2778 /** 2779 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2780 * universal plane handler call 2781 * @crtc: crtc to update cursor for 2782 * @req: data pointer for the ioctl 2783 * @file_priv: drm file for the ioctl call 2784 * 2785 * Legacy cursor ioctl's work directly with driver buffer handles. To 2786 * translate legacy ioctl calls into universal plane handler calls, we need to 2787 * wrap the native buffer handle in a drm_framebuffer. 2788 * 2789 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2790 * buffer with a pitch of 4*width; the universal plane interface should be used 2791 * directly in cases where the hardware can support other buffer settings and 2792 * userspace wants to make use of these capabilities. 2793 * 2794 * Returns: 2795 * Zero on success, negative errno on failure. 2796 */ 2797 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2798 struct drm_mode_cursor2 *req, 2799 struct drm_file *file_priv) 2800 { 2801 struct drm_device *dev = crtc->dev; 2802 struct drm_framebuffer *fb = NULL; 2803 struct drm_mode_fb_cmd2 fbreq = { 2804 .width = req->width, 2805 .height = req->height, 2806 .pixel_format = DRM_FORMAT_ARGB8888, 2807 .pitches = { req->width * 4 }, 2808 .handles = { req->handle }, 2809 }; 2810 int32_t crtc_x, crtc_y; 2811 uint32_t crtc_w = 0, crtc_h = 0; 2812 uint32_t src_w = 0, src_h = 0; 2813 int ret = 0; 2814 2815 BUG_ON(!crtc->cursor); 2816 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2817 2818 /* 2819 * Obtain fb we'll be using (either new or existing) and take an extra 2820 * reference to it if fb != null. setplane will take care of dropping 2821 * the reference if the plane update fails. 2822 */ 2823 if (req->flags & DRM_MODE_CURSOR_BO) { 2824 if (req->handle) { 2825 fb = internal_framebuffer_create(dev, &fbreq, file_priv); 2826 if (IS_ERR(fb)) { 2827 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2828 return PTR_ERR(fb); 2829 } 2830 } else { 2831 fb = NULL; 2832 } 2833 } else { 2834 fb = crtc->cursor->fb; 2835 if (fb) 2836 drm_framebuffer_reference(fb); 2837 } 2838 2839 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2840 crtc_x = req->x; 2841 crtc_y = req->y; 2842 } else { 2843 crtc_x = crtc->cursor_x; 2844 crtc_y = crtc->cursor_y; 2845 } 2846 2847 if (fb) { 2848 crtc_w = fb->width; 2849 crtc_h = fb->height; 2850 src_w = fb->width << 16; 2851 src_h = fb->height << 16; 2852 } 2853 2854 /* 2855 * setplane_internal will take care of deref'ing either the old or new 2856 * framebuffer depending on success. 2857 */ 2858 ret = __setplane_internal(crtc->cursor, crtc, fb, 2859 crtc_x, crtc_y, crtc_w, crtc_h, 2860 0, 0, src_w, src_h); 2861 2862 /* Update successful; save new cursor position, if necessary */ 2863 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2864 crtc->cursor_x = req->x; 2865 crtc->cursor_y = req->y; 2866 } 2867 2868 return ret; 2869 } 2870 2871 static int drm_mode_cursor_common(struct drm_device *dev, 2872 struct drm_mode_cursor2 *req, 2873 struct drm_file *file_priv) 2874 { 2875 struct drm_crtc *crtc; 2876 int ret = 0; 2877 2878 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2879 return -EINVAL; 2880 2881 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 2882 return -EINVAL; 2883 2884 crtc = drm_crtc_find(dev, req->crtc_id); 2885 if (!crtc) { 2886 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 2887 return -ENOENT; 2888 } 2889 2890 /* 2891 * If this crtc has a universal cursor plane, call that plane's update 2892 * handler rather than using legacy cursor handlers. 2893 */ 2894 drm_modeset_lock_crtc(crtc, crtc->cursor); 2895 if (crtc->cursor) { 2896 ret = drm_mode_cursor_universal(crtc, req, file_priv); 2897 goto out; 2898 } 2899 2900 if (req->flags & DRM_MODE_CURSOR_BO) { 2901 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 2902 ret = -ENXIO; 2903 goto out; 2904 } 2905 /* Turns off the cursor if handle is 0 */ 2906 if (crtc->funcs->cursor_set2) 2907 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 2908 req->width, req->height, req->hot_x, req->hot_y); 2909 else 2910 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 2911 req->width, req->height); 2912 } 2913 2914 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2915 if (crtc->funcs->cursor_move) { 2916 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 2917 } else { 2918 ret = -EFAULT; 2919 goto out; 2920 } 2921 } 2922 out: 2923 drm_modeset_unlock_crtc(crtc); 2924 2925 return ret; 2926 2927 } 2928 2929 2930 /** 2931 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 2932 * @dev: drm device for the ioctl 2933 * @data: data pointer for the ioctl 2934 * @file_priv: drm file for the ioctl call 2935 * 2936 * Set the cursor configuration based on user request. 2937 * 2938 * Called by the user via ioctl. 2939 * 2940 * Returns: 2941 * Zero on success, negative errno on failure. 2942 */ 2943 int drm_mode_cursor_ioctl(struct drm_device *dev, 2944 void *data, struct drm_file *file_priv) 2945 { 2946 struct drm_mode_cursor *req = data; 2947 struct drm_mode_cursor2 new_req; 2948 2949 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 2950 new_req.hot_x = new_req.hot_y = 0; 2951 2952 return drm_mode_cursor_common(dev, &new_req, file_priv); 2953 } 2954 2955 /** 2956 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 2957 * @dev: drm device for the ioctl 2958 * @data: data pointer for the ioctl 2959 * @file_priv: drm file for the ioctl call 2960 * 2961 * Set the cursor configuration based on user request. This implements the 2nd 2962 * version of the cursor ioctl, which allows userspace to additionally specify 2963 * the hotspot of the pointer. 2964 * 2965 * Called by the user via ioctl. 2966 * 2967 * Returns: 2968 * Zero on success, negative errno on failure. 2969 */ 2970 int drm_mode_cursor2_ioctl(struct drm_device *dev, 2971 void *data, struct drm_file *file_priv) 2972 { 2973 struct drm_mode_cursor2 *req = data; 2974 2975 return drm_mode_cursor_common(dev, req, file_priv); 2976 } 2977 2978 /** 2979 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 2980 * @bpp: bits per pixels 2981 * @depth: bit depth per pixel 2982 * 2983 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 2984 * Useful in fbdev emulation code, since that deals in those values. 2985 */ 2986 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 2987 { 2988 uint32_t fmt; 2989 2990 switch (bpp) { 2991 case 8: 2992 fmt = DRM_FORMAT_C8; 2993 break; 2994 case 16: 2995 if (depth == 15) 2996 fmt = DRM_FORMAT_XRGB1555; 2997 else 2998 fmt = DRM_FORMAT_RGB565; 2999 break; 3000 case 24: 3001 fmt = DRM_FORMAT_RGB888; 3002 break; 3003 case 32: 3004 if (depth == 24) 3005 fmt = DRM_FORMAT_XRGB8888; 3006 else if (depth == 30) 3007 fmt = DRM_FORMAT_XRGB2101010; 3008 else 3009 fmt = DRM_FORMAT_ARGB8888; 3010 break; 3011 default: 3012 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3013 fmt = DRM_FORMAT_XRGB8888; 3014 break; 3015 } 3016 3017 return fmt; 3018 } 3019 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3020 3021 /** 3022 * drm_mode_addfb - add an FB to the graphics configuration 3023 * @dev: drm device for the ioctl 3024 * @data: data pointer for the ioctl 3025 * @file_priv: drm file for the ioctl call 3026 * 3027 * Add a new FB to the specified CRTC, given a user request. This is the 3028 * original addfb ioctl which only supported RGB formats. 3029 * 3030 * Called by the user via ioctl. 3031 * 3032 * Returns: 3033 * Zero on success, negative errno on failure. 3034 */ 3035 int drm_mode_addfb(struct drm_device *dev, 3036 void *data, struct drm_file *file_priv) 3037 { 3038 struct drm_mode_fb_cmd *or = data; 3039 struct drm_mode_fb_cmd2 r = {}; 3040 int ret; 3041 3042 /* convert to new format and call new ioctl */ 3043 r.fb_id = or->fb_id; 3044 r.width = or->width; 3045 r.height = or->height; 3046 r.pitches[0] = or->pitch; 3047 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3048 r.handles[0] = or->handle; 3049 3050 ret = drm_mode_addfb2(dev, &r, file_priv); 3051 if (ret) 3052 return ret; 3053 3054 or->fb_id = r.fb_id; 3055 3056 return ret; 3057 } 3058 3059 static int format_check(const struct drm_mode_fb_cmd2 *r) 3060 { 3061 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3062 3063 switch (format) { 3064 case DRM_FORMAT_C8: 3065 case DRM_FORMAT_RGB332: 3066 case DRM_FORMAT_BGR233: 3067 case DRM_FORMAT_XRGB4444: 3068 case DRM_FORMAT_XBGR4444: 3069 case DRM_FORMAT_RGBX4444: 3070 case DRM_FORMAT_BGRX4444: 3071 case DRM_FORMAT_ARGB4444: 3072 case DRM_FORMAT_ABGR4444: 3073 case DRM_FORMAT_RGBA4444: 3074 case DRM_FORMAT_BGRA4444: 3075 case DRM_FORMAT_XRGB1555: 3076 case DRM_FORMAT_XBGR1555: 3077 case DRM_FORMAT_RGBX5551: 3078 case DRM_FORMAT_BGRX5551: 3079 case DRM_FORMAT_ARGB1555: 3080 case DRM_FORMAT_ABGR1555: 3081 case DRM_FORMAT_RGBA5551: 3082 case DRM_FORMAT_BGRA5551: 3083 case DRM_FORMAT_RGB565: 3084 case DRM_FORMAT_BGR565: 3085 case DRM_FORMAT_RGB888: 3086 case DRM_FORMAT_BGR888: 3087 case DRM_FORMAT_XRGB8888: 3088 case DRM_FORMAT_XBGR8888: 3089 case DRM_FORMAT_RGBX8888: 3090 case DRM_FORMAT_BGRX8888: 3091 case DRM_FORMAT_ARGB8888: 3092 case DRM_FORMAT_ABGR8888: 3093 case DRM_FORMAT_RGBA8888: 3094 case DRM_FORMAT_BGRA8888: 3095 case DRM_FORMAT_XRGB2101010: 3096 case DRM_FORMAT_XBGR2101010: 3097 case DRM_FORMAT_RGBX1010102: 3098 case DRM_FORMAT_BGRX1010102: 3099 case DRM_FORMAT_ARGB2101010: 3100 case DRM_FORMAT_ABGR2101010: 3101 case DRM_FORMAT_RGBA1010102: 3102 case DRM_FORMAT_BGRA1010102: 3103 case DRM_FORMAT_YUYV: 3104 case DRM_FORMAT_YVYU: 3105 case DRM_FORMAT_UYVY: 3106 case DRM_FORMAT_VYUY: 3107 case DRM_FORMAT_AYUV: 3108 case DRM_FORMAT_NV12: 3109 case DRM_FORMAT_NV21: 3110 case DRM_FORMAT_NV16: 3111 case DRM_FORMAT_NV61: 3112 case DRM_FORMAT_NV24: 3113 case DRM_FORMAT_NV42: 3114 case DRM_FORMAT_YUV410: 3115 case DRM_FORMAT_YVU410: 3116 case DRM_FORMAT_YUV411: 3117 case DRM_FORMAT_YVU411: 3118 case DRM_FORMAT_YUV420: 3119 case DRM_FORMAT_YVU420: 3120 case DRM_FORMAT_YUV422: 3121 case DRM_FORMAT_YVU422: 3122 case DRM_FORMAT_YUV444: 3123 case DRM_FORMAT_YVU444: 3124 return 0; 3125 default: 3126 DRM_DEBUG_KMS("invalid pixel format %s\n", 3127 drm_get_format_name(r->pixel_format)); 3128 return -EINVAL; 3129 } 3130 } 3131 3132 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3133 { 3134 int ret, hsub, vsub, num_planes, i; 3135 3136 ret = format_check(r); 3137 if (ret) { 3138 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3139 drm_get_format_name(r->pixel_format)); 3140 return ret; 3141 } 3142 3143 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3144 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3145 num_planes = drm_format_num_planes(r->pixel_format); 3146 3147 if (r->width == 0 || r->width % hsub) { 3148 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3149 return -EINVAL; 3150 } 3151 3152 if (r->height == 0 || r->height % vsub) { 3153 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3154 return -EINVAL; 3155 } 3156 3157 for (i = 0; i < num_planes; i++) { 3158 unsigned int width = r->width / (i != 0 ? hsub : 1); 3159 unsigned int height = r->height / (i != 0 ? vsub : 1); 3160 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3161 3162 if (!r->handles[i]) { 3163 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3164 return -EINVAL; 3165 } 3166 3167 if ((uint64_t) width * cpp > UINT_MAX) 3168 return -ERANGE; 3169 3170 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3171 return -ERANGE; 3172 3173 if (r->pitches[i] < width * cpp) { 3174 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3175 return -EINVAL; 3176 } 3177 3178 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { 3179 DRM_DEBUG_KMS("bad fb modifier %lu for plane %d\n", 3180 r->modifier[i], i); 3181 return -EINVAL; 3182 } 3183 3184 /* modifier specific checks: */ 3185 switch (r->modifier[i]) { 3186 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: 3187 /* NOTE: the pitch restriction may be lifted later if it turns 3188 * out that no hw has this restriction: 3189 */ 3190 if (r->pixel_format != DRM_FORMAT_NV12 || 3191 width % 128 || height % 32 || 3192 r->pitches[i] % 128) { 3193 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i); 3194 return -EINVAL; 3195 } 3196 break; 3197 3198 default: 3199 break; 3200 } 3201 } 3202 3203 for (i = num_planes; i < 4; i++) { 3204 if (r->modifier[i]) { 3205 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i); 3206 return -EINVAL; 3207 } 3208 3209 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ 3210 if (!(r->flags & DRM_MODE_FB_MODIFIERS)) 3211 continue; 3212 3213 if (r->handles[i]) { 3214 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i); 3215 return -EINVAL; 3216 } 3217 3218 if (r->pitches[i]) { 3219 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i); 3220 return -EINVAL; 3221 } 3222 3223 if (r->offsets[i]) { 3224 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i); 3225 return -EINVAL; 3226 } 3227 } 3228 3229 return 0; 3230 } 3231 3232 static struct drm_framebuffer * 3233 internal_framebuffer_create(struct drm_device *dev, 3234 struct drm_mode_fb_cmd2 *r, 3235 struct drm_file *file_priv) 3236 { 3237 struct drm_mode_config *config = &dev->mode_config; 3238 struct drm_framebuffer *fb; 3239 int ret; 3240 3241 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { 3242 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3243 return ERR_PTR(-EINVAL); 3244 } 3245 3246 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3247 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3248 r->width, config->min_width, config->max_width); 3249 return ERR_PTR(-EINVAL); 3250 } 3251 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3252 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3253 r->height, config->min_height, config->max_height); 3254 return ERR_PTR(-EINVAL); 3255 } 3256 3257 if (r->flags & DRM_MODE_FB_MODIFIERS && 3258 !dev->mode_config.allow_fb_modifiers) { 3259 DRM_DEBUG_KMS("driver does not support fb modifiers\n"); 3260 return ERR_PTR(-EINVAL); 3261 } 3262 3263 ret = framebuffer_check(r); 3264 if (ret) 3265 return ERR_PTR(ret); 3266 3267 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3268 if (IS_ERR(fb)) { 3269 DRM_DEBUG_KMS("could not create framebuffer\n"); 3270 return fb; 3271 } 3272 3273 return fb; 3274 } 3275 3276 /** 3277 * drm_mode_addfb2 - add an FB to the graphics configuration 3278 * @dev: drm device for the ioctl 3279 * @data: data pointer for the ioctl 3280 * @file_priv: drm file for the ioctl call 3281 * 3282 * Add a new FB to the specified CRTC, given a user request with format. This is 3283 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3284 * and uses fourcc codes as pixel format specifiers. 3285 * 3286 * Called by the user via ioctl. 3287 * 3288 * Returns: 3289 * Zero on success, negative errno on failure. 3290 */ 3291 int drm_mode_addfb2(struct drm_device *dev, 3292 void *data, struct drm_file *file_priv) 3293 { 3294 struct drm_mode_fb_cmd2 *r = data; 3295 struct drm_framebuffer *fb; 3296 3297 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3298 return -EINVAL; 3299 3300 fb = internal_framebuffer_create(dev, r, file_priv); 3301 if (IS_ERR(fb)) 3302 return PTR_ERR(fb); 3303 3304 /* Transfer ownership to the filp for reaping on close */ 3305 3306 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3307 mutex_lock(&file_priv->fbs_lock); 3308 r->fb_id = fb->base.id; 3309 list_add(&fb->filp_head, &file_priv->fbs); 3310 mutex_unlock(&file_priv->fbs_lock); 3311 3312 return 0; 3313 } 3314 3315 /** 3316 * drm_mode_rmfb - remove an FB from the configuration 3317 * @dev: drm device for the ioctl 3318 * @data: data pointer for the ioctl 3319 * @file_priv: drm file for the ioctl call 3320 * 3321 * Remove the FB specified by the user. 3322 * 3323 * Called by the user via ioctl. 3324 * 3325 * Returns: 3326 * Zero on success, negative errno on failure. 3327 */ 3328 int drm_mode_rmfb(struct drm_device *dev, 3329 void *data, struct drm_file *file_priv) 3330 { 3331 struct drm_framebuffer *fb = NULL; 3332 struct drm_framebuffer *fbl = NULL; 3333 uint32_t *id = data; 3334 int found = 0; 3335 3336 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3337 return -EINVAL; 3338 3339 mutex_lock(&file_priv->fbs_lock); 3340 mutex_lock(&dev->mode_config.fb_lock); 3341 fb = __drm_framebuffer_lookup(dev, *id); 3342 if (!fb) 3343 goto fail_lookup; 3344 3345 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3346 if (fb == fbl) 3347 found = 1; 3348 if (!found) 3349 goto fail_lookup; 3350 3351 list_del_init(&fb->filp_head); 3352 mutex_unlock(&dev->mode_config.fb_lock); 3353 mutex_unlock(&file_priv->fbs_lock); 3354 3355 drm_framebuffer_unreference(fb); 3356 3357 return 0; 3358 3359 fail_lookup: 3360 mutex_unlock(&dev->mode_config.fb_lock); 3361 mutex_unlock(&file_priv->fbs_lock); 3362 3363 return -ENOENT; 3364 } 3365 3366 /** 3367 * drm_mode_getfb - get FB info 3368 * @dev: drm device for the ioctl 3369 * @data: data pointer for the ioctl 3370 * @file_priv: drm file for the ioctl call 3371 * 3372 * Lookup the FB given its ID and return info about it. 3373 * 3374 * Called by the user via ioctl. 3375 * 3376 * Returns: 3377 * Zero on success, negative errno on failure. 3378 */ 3379 int drm_mode_getfb(struct drm_device *dev, 3380 void *data, struct drm_file *file_priv) 3381 { 3382 struct drm_mode_fb_cmd *r = data; 3383 struct drm_framebuffer *fb; 3384 int ret; 3385 3386 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3387 return -EINVAL; 3388 3389 fb = drm_framebuffer_lookup(dev, r->fb_id); 3390 if (!fb) 3391 return -ENOENT; 3392 3393 r->height = fb->height; 3394 r->width = fb->width; 3395 r->depth = fb->depth; 3396 r->bpp = fb->bits_per_pixel; 3397 r->pitch = fb->pitches[0]; 3398 if (fb->funcs->create_handle) { 3399 ret = fb->funcs->create_handle(fb, file_priv, &r->handle); 3400 } else { 3401 ret = -ENODEV; 3402 } 3403 3404 drm_framebuffer_unreference(fb); 3405 3406 return ret; 3407 } 3408 3409 /** 3410 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3411 * @dev: drm device for the ioctl 3412 * @data: data pointer for the ioctl 3413 * @file_priv: drm file for the ioctl call 3414 * 3415 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3416 * rectangle list. Generic userspace which does frontbuffer rendering must call 3417 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3418 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3419 * 3420 * Modesetting drivers which always update the frontbuffer do not need to 3421 * implement the corresponding ->dirty framebuffer callback. 3422 * 3423 * Called by the user via ioctl. 3424 * 3425 * Returns: 3426 * Zero on success, negative errno on failure. 3427 */ 3428 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3429 void *data, struct drm_file *file_priv) 3430 { 3431 struct drm_clip_rect __user *clips_ptr; 3432 struct drm_clip_rect *clips = NULL; 3433 struct drm_mode_fb_dirty_cmd *r = data; 3434 struct drm_framebuffer *fb; 3435 unsigned flags; 3436 int num_clips; 3437 int ret; 3438 3439 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3440 return -EINVAL; 3441 3442 fb = drm_framebuffer_lookup(dev, r->fb_id); 3443 if (!fb) 3444 return -ENOENT; 3445 3446 num_clips = r->num_clips; 3447 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3448 3449 if (!num_clips != !clips_ptr) { 3450 ret = -EINVAL; 3451 goto out_err1; 3452 } 3453 3454 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3455 3456 /* If userspace annotates copy, clips must come in pairs */ 3457 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3458 ret = -EINVAL; 3459 goto out_err1; 3460 } 3461 3462 if (num_clips && clips_ptr) { 3463 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3464 ret = -EINVAL; 3465 goto out_err1; 3466 } 3467 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); 3468 if (!clips) { 3469 ret = -ENOMEM; 3470 goto out_err1; 3471 } 3472 3473 ret = copy_from_user(clips, clips_ptr, 3474 num_clips * sizeof(*clips)); 3475 if (ret) { 3476 ret = -EFAULT; 3477 goto out_err2; 3478 } 3479 } 3480 3481 if (fb->funcs->dirty) { 3482 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3483 clips, num_clips); 3484 } else { 3485 ret = -ENOSYS; 3486 } 3487 3488 out_err2: 3489 kfree(clips); 3490 out_err1: 3491 drm_framebuffer_unreference(fb); 3492 3493 return ret; 3494 } 3495 3496 3497 /** 3498 * drm_fb_release - remove and free the FBs on this file 3499 * @priv: drm file for the ioctl 3500 * 3501 * Destroy all the FBs associated with @filp. 3502 * 3503 * Called by the user via ioctl. 3504 * 3505 * Returns: 3506 * Zero on success, negative errno on failure. 3507 */ 3508 void drm_fb_release(struct drm_file *priv) 3509 { 3510 struct drm_framebuffer *fb, *tfb; 3511 3512 /* 3513 * When the file gets released that means no one else can access the fb 3514 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3515 * avoid upsetting lockdep since the universal cursor code adds a 3516 * framebuffer while holding mutex locks. 3517 * 3518 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3519 * locks is impossible here since no one else but this function can get 3520 * at it any more. 3521 */ 3522 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3523 list_del_init(&fb->filp_head); 3524 3525 /* This drops the fpriv->fbs reference. */ 3526 drm_framebuffer_unreference(fb); 3527 } 3528 } 3529 3530 /** 3531 * drm_property_create - create a new property type 3532 * @dev: drm device 3533 * @flags: flags specifying the property type 3534 * @name: name of the property 3535 * @num_values: number of pre-defined values 3536 * 3537 * This creates a new generic drm property which can then be attached to a drm 3538 * object with drm_object_attach_property. The returned property object must be 3539 * freed with drm_property_destroy. 3540 * 3541 * Note that the DRM core keeps a per-device list of properties and that, if 3542 * drm_mode_config_cleanup() is called, it will destroy all properties created 3543 * by the driver. 3544 * 3545 * Returns: 3546 * A pointer to the newly created property on success, NULL on failure. 3547 */ 3548 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3549 const char *name, int num_values) 3550 { 3551 struct drm_property *property = NULL; 3552 int ret; 3553 3554 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3555 if (!property) 3556 return NULL; 3557 3558 property->dev = dev; 3559 3560 if (num_values) { 3561 property->values = kcalloc(num_values, sizeof(uint64_t), 3562 GFP_KERNEL); 3563 if (!property->values) 3564 goto fail; 3565 } 3566 3567 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3568 if (ret) 3569 goto fail; 3570 3571 property->flags = flags; 3572 property->num_values = num_values; 3573 INIT_LIST_HEAD(&property->enum_list); 3574 3575 if (name) { 3576 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3577 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3578 } 3579 3580 list_add_tail(&property->head, &dev->mode_config.property_list); 3581 3582 WARN_ON(!drm_property_type_valid(property)); 3583 3584 return property; 3585 fail: 3586 kfree(property->values); 3587 kfree(property); 3588 return NULL; 3589 } 3590 EXPORT_SYMBOL(drm_property_create); 3591 3592 /** 3593 * drm_property_create_enum - create a new enumeration property type 3594 * @dev: drm device 3595 * @flags: flags specifying the property type 3596 * @name: name of the property 3597 * @props: enumeration lists with property values 3598 * @num_values: number of pre-defined values 3599 * 3600 * This creates a new generic drm property which can then be attached to a drm 3601 * object with drm_object_attach_property. The returned property object must be 3602 * freed with drm_property_destroy. 3603 * 3604 * Userspace is only allowed to set one of the predefined values for enumeration 3605 * properties. 3606 * 3607 * Returns: 3608 * A pointer to the newly created property on success, NULL on failure. 3609 */ 3610 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3611 const char *name, 3612 const struct drm_prop_enum_list *props, 3613 int num_values) 3614 { 3615 struct drm_property *property; 3616 int i, ret; 3617 3618 flags |= DRM_MODE_PROP_ENUM; 3619 3620 property = drm_property_create(dev, flags, name, num_values); 3621 if (!property) 3622 return NULL; 3623 3624 for (i = 0; i < num_values; i++) { 3625 ret = drm_property_add_enum(property, i, 3626 props[i].type, 3627 props[i].name); 3628 if (ret) { 3629 drm_property_destroy(dev, property); 3630 return NULL; 3631 } 3632 } 3633 3634 return property; 3635 } 3636 EXPORT_SYMBOL(drm_property_create_enum); 3637 3638 /** 3639 * drm_property_create_bitmask - create a new bitmask property type 3640 * @dev: drm device 3641 * @flags: flags specifying the property type 3642 * @name: name of the property 3643 * @props: enumeration lists with property bitflags 3644 * @num_props: size of the @props array 3645 * @supported_bits: bitmask of all supported enumeration values 3646 * 3647 * This creates a new bitmask drm property which can then be attached to a drm 3648 * object with drm_object_attach_property. The returned property object must be 3649 * freed with drm_property_destroy. 3650 * 3651 * Compared to plain enumeration properties userspace is allowed to set any 3652 * or'ed together combination of the predefined property bitflag values 3653 * 3654 * Returns: 3655 * A pointer to the newly created property on success, NULL on failure. 3656 */ 3657 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3658 int flags, const char *name, 3659 const struct drm_prop_enum_list *props, 3660 int num_props, 3661 uint64_t supported_bits) 3662 { 3663 struct drm_property *property; 3664 int i, ret, index = 0; 3665 int num_values = hweight64(supported_bits); 3666 3667 flags |= DRM_MODE_PROP_BITMASK; 3668 3669 property = drm_property_create(dev, flags, name, num_values); 3670 if (!property) 3671 return NULL; 3672 for (i = 0; i < num_props; i++) { 3673 if (!(supported_bits & (1ULL << props[i].type))) 3674 continue; 3675 3676 if (WARN_ON(index >= num_values)) { 3677 drm_property_destroy(dev, property); 3678 return NULL; 3679 } 3680 3681 ret = drm_property_add_enum(property, index++, 3682 props[i].type, 3683 props[i].name); 3684 if (ret) { 3685 drm_property_destroy(dev, property); 3686 return NULL; 3687 } 3688 } 3689 3690 return property; 3691 } 3692 EXPORT_SYMBOL(drm_property_create_bitmask); 3693 3694 static struct drm_property *property_create_range(struct drm_device *dev, 3695 int flags, const char *name, 3696 uint64_t min, uint64_t max) 3697 { 3698 struct drm_property *property; 3699 3700 property = drm_property_create(dev, flags, name, 2); 3701 if (!property) 3702 return NULL; 3703 3704 property->values[0] = min; 3705 property->values[1] = max; 3706 3707 return property; 3708 } 3709 3710 /** 3711 * drm_property_create_range - create a new unsigned ranged property type 3712 * @dev: drm device 3713 * @flags: flags specifying the property type 3714 * @name: name of the property 3715 * @min: minimum value of the property 3716 * @max: maximum value of the property 3717 * 3718 * This creates a new generic drm property which can then be attached to a drm 3719 * object with drm_object_attach_property. The returned property object must be 3720 * freed with drm_property_destroy. 3721 * 3722 * Userspace is allowed to set any unsigned integer value in the (min, max) 3723 * range inclusive. 3724 * 3725 * Returns: 3726 * A pointer to the newly created property on success, NULL on failure. 3727 */ 3728 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3729 const char *name, 3730 uint64_t min, uint64_t max) 3731 { 3732 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3733 name, min, max); 3734 } 3735 EXPORT_SYMBOL(drm_property_create_range); 3736 3737 /** 3738 * drm_property_create_signed_range - create a new signed ranged property type 3739 * @dev: drm device 3740 * @flags: flags specifying the property type 3741 * @name: name of the property 3742 * @min: minimum value of the property 3743 * @max: maximum value of the property 3744 * 3745 * This creates a new generic drm property which can then be attached to a drm 3746 * object with drm_object_attach_property. The returned property object must be 3747 * freed with drm_property_destroy. 3748 * 3749 * Userspace is allowed to set any signed integer value in the (min, max) 3750 * range inclusive. 3751 * 3752 * Returns: 3753 * A pointer to the newly created property on success, NULL on failure. 3754 */ 3755 struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3756 int flags, const char *name, 3757 int64_t min, int64_t max) 3758 { 3759 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3760 name, I642U64(min), I642U64(max)); 3761 } 3762 EXPORT_SYMBOL(drm_property_create_signed_range); 3763 3764 /** 3765 * drm_property_create_object - create a new object property type 3766 * @dev: drm device 3767 * @flags: flags specifying the property type 3768 * @name: name of the property 3769 * @type: object type from DRM_MODE_OBJECT_* defines 3770 * 3771 * This creates a new generic drm property which can then be attached to a drm 3772 * object with drm_object_attach_property. The returned property object must be 3773 * freed with drm_property_destroy. 3774 * 3775 * Userspace is only allowed to set this to any property value of the given 3776 * @type. Only useful for atomic properties, which is enforced. 3777 * 3778 * Returns: 3779 * A pointer to the newly created property on success, NULL on failure. 3780 */ 3781 struct drm_property *drm_property_create_object(struct drm_device *dev, 3782 int flags, const char *name, uint32_t type) 3783 { 3784 struct drm_property *property; 3785 3786 flags |= DRM_MODE_PROP_OBJECT; 3787 3788 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) 3789 return NULL; 3790 3791 property = drm_property_create(dev, flags, name, 1); 3792 if (!property) 3793 return NULL; 3794 3795 property->values[0] = type; 3796 3797 return property; 3798 } 3799 EXPORT_SYMBOL(drm_property_create_object); 3800 3801 /** 3802 * drm_property_create_bool - create a new boolean property type 3803 * @dev: drm device 3804 * @flags: flags specifying the property type 3805 * @name: name of the property 3806 * 3807 * This creates a new generic drm property which can then be attached to a drm 3808 * object with drm_object_attach_property. The returned property object must be 3809 * freed with drm_property_destroy. 3810 * 3811 * This is implemented as a ranged property with only {0, 1} as valid values. 3812 * 3813 * Returns: 3814 * A pointer to the newly created property on success, NULL on failure. 3815 */ 3816 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, 3817 const char *name) 3818 { 3819 return drm_property_create_range(dev, flags, name, 0, 1); 3820 } 3821 EXPORT_SYMBOL(drm_property_create_bool); 3822 3823 /** 3824 * drm_property_add_enum - add a possible value to an enumeration property 3825 * @property: enumeration property to change 3826 * @index: index of the new enumeration 3827 * @value: value of the new enumeration 3828 * @name: symbolic name of the new enumeration 3829 * 3830 * This functions adds enumerations to a property. 3831 * 3832 * It's use is deprecated, drivers should use one of the more specific helpers 3833 * to directly create the property with all enumerations already attached. 3834 * 3835 * Returns: 3836 * Zero on success, error code on failure. 3837 */ 3838 int drm_property_add_enum(struct drm_property *property, int index, 3839 uint64_t value, const char *name) 3840 { 3841 struct drm_property_enum *prop_enum; 3842 3843 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3844 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3845 return -EINVAL; 3846 3847 /* 3848 * Bitmask enum properties have the additional constraint of values 3849 * from 0 to 63 3850 */ 3851 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3852 (value > 63)) 3853 return -EINVAL; 3854 3855 if (!list_empty(&property->enum_list)) { 3856 list_for_each_entry(prop_enum, &property->enum_list, head) { 3857 if (prop_enum->value == value) { 3858 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3859 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3860 return 0; 3861 } 3862 } 3863 } 3864 3865 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3866 if (!prop_enum) 3867 return -ENOMEM; 3868 3869 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3870 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3871 prop_enum->value = value; 3872 3873 property->values[index] = value; 3874 list_add_tail(&prop_enum->head, &property->enum_list); 3875 return 0; 3876 } 3877 EXPORT_SYMBOL(drm_property_add_enum); 3878 3879 /** 3880 * drm_property_destroy - destroy a drm property 3881 * @dev: drm device 3882 * @property: property to destry 3883 * 3884 * This function frees a property including any attached resources like 3885 * enumeration values. 3886 */ 3887 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 3888 { 3889 struct drm_property_enum *prop_enum, *pt; 3890 3891 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 3892 list_del(&prop_enum->head); 3893 kfree(prop_enum); 3894 } 3895 3896 if (property->num_values) 3897 kfree(property->values); 3898 drm_mode_object_put(dev, &property->base); 3899 list_del(&property->head); 3900 kfree(property); 3901 } 3902 EXPORT_SYMBOL(drm_property_destroy); 3903 3904 /** 3905 * drm_object_attach_property - attach a property to a modeset object 3906 * @obj: drm modeset object 3907 * @property: property to attach 3908 * @init_val: initial value of the property 3909 * 3910 * This attaches the given property to the modeset object with the given initial 3911 * value. Currently this function cannot fail since the properties are stored in 3912 * a statically sized array. 3913 */ 3914 void drm_object_attach_property(struct drm_mode_object *obj, 3915 struct drm_property *property, 3916 uint64_t init_val) 3917 { 3918 int count = obj->properties->count; 3919 3920 if (count == DRM_OBJECT_MAX_PROPERTY) { 3921 WARN(1, "Failed to attach object property (type: 0x%x). Please " 3922 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 3923 "you see this message on the same object type.\n", 3924 obj->type); 3925 return; 3926 } 3927 3928 obj->properties->properties[count] = property; 3929 obj->properties->values[count] = init_val; 3930 obj->properties->count++; 3931 if (property->flags & DRM_MODE_PROP_ATOMIC) 3932 obj->properties->atomic_count++; 3933 } 3934 EXPORT_SYMBOL(drm_object_attach_property); 3935 3936 /** 3937 * drm_object_property_set_value - set the value of a property 3938 * @obj: drm mode object to set property value for 3939 * @property: property to set 3940 * @val: value the property should be set to 3941 * 3942 * This functions sets a given property on a given object. This function only 3943 * changes the software state of the property, it does not call into the 3944 * driver's ->set_property callback. 3945 * 3946 * Returns: 3947 * Zero on success, error code on failure. 3948 */ 3949 int drm_object_property_set_value(struct drm_mode_object *obj, 3950 struct drm_property *property, uint64_t val) 3951 { 3952 int i; 3953 3954 for (i = 0; i < obj->properties->count; i++) { 3955 if (obj->properties->properties[i] == property) { 3956 obj->properties->values[i] = val; 3957 return 0; 3958 } 3959 } 3960 3961 return -EINVAL; 3962 } 3963 EXPORT_SYMBOL(drm_object_property_set_value); 3964 3965 /** 3966 * drm_object_property_get_value - retrieve the value of a property 3967 * @obj: drm mode object to get property value from 3968 * @property: property to retrieve 3969 * @val: storage for the property value 3970 * 3971 * This function retrieves the softare state of the given property for the given 3972 * property. Since there is no driver callback to retrieve the current property 3973 * value this might be out of sync with the hardware, depending upon the driver 3974 * and property. 3975 * 3976 * Returns: 3977 * Zero on success, error code on failure. 3978 */ 3979 int drm_object_property_get_value(struct drm_mode_object *obj, 3980 struct drm_property *property, uint64_t *val) 3981 { 3982 int i; 3983 3984 /* read-only properties bypass atomic mechanism and still store 3985 * their value in obj->properties->values[].. mostly to avoid 3986 * having to deal w/ EDID and similar props in atomic paths: 3987 */ 3988 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && 3989 !(property->flags & DRM_MODE_PROP_IMMUTABLE)) 3990 return drm_atomic_get_property(obj, property, val); 3991 3992 for (i = 0; i < obj->properties->count; i++) { 3993 if (obj->properties->properties[i] == property) { 3994 *val = obj->properties->values[i]; 3995 return 0; 3996 } 3997 } 3998 3999 return -EINVAL; 4000 } 4001 EXPORT_SYMBOL(drm_object_property_get_value); 4002 4003 /** 4004 * drm_mode_getproperty_ioctl - get the property metadata 4005 * @dev: DRM device 4006 * @data: ioctl data 4007 * @file_priv: DRM file info 4008 * 4009 * This function retrieves the metadata for a given property, like the different 4010 * possible values for an enum property or the limits for a range property. 4011 * 4012 * Blob properties are special 4013 * 4014 * Called by the user via ioctl. 4015 * 4016 * Returns: 4017 * Zero on success, negative errno on failure. 4018 */ 4019 int drm_mode_getproperty_ioctl(struct drm_device *dev, 4020 void *data, struct drm_file *file_priv) 4021 { 4022 struct drm_mode_get_property *out_resp = data; 4023 struct drm_property *property; 4024 int enum_count = 0; 4025 int value_count = 0; 4026 int ret = 0, i; 4027 int copied; 4028 struct drm_property_enum *prop_enum; 4029 struct drm_mode_property_enum __user *enum_ptr; 4030 uint64_t __user *values_ptr; 4031 4032 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4033 return -EINVAL; 4034 4035 drm_modeset_lock_all(dev); 4036 property = drm_property_find(dev, out_resp->prop_id); 4037 if (!property) { 4038 ret = -ENOENT; 4039 goto done; 4040 } 4041 4042 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4043 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4044 list_for_each_entry(prop_enum, &property->enum_list, head) 4045 enum_count++; 4046 } 4047 4048 value_count = property->num_values; 4049 4050 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 4051 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 4052 out_resp->flags = property->flags; 4053 4054 if ((out_resp->count_values >= value_count) && value_count) { 4055 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 4056 for (i = 0; i < value_count; i++) { 4057 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 4058 ret = -EFAULT; 4059 goto done; 4060 } 4061 } 4062 } 4063 out_resp->count_values = value_count; 4064 4065 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4066 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4067 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 4068 copied = 0; 4069 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 4070 list_for_each_entry(prop_enum, &property->enum_list, head) { 4071 4072 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 4073 ret = -EFAULT; 4074 goto done; 4075 } 4076 4077 if (copy_to_user(&enum_ptr[copied].name, 4078 &prop_enum->name, DRM_PROP_NAME_LEN)) { 4079 ret = -EFAULT; 4080 goto done; 4081 } 4082 copied++; 4083 } 4084 } 4085 out_resp->count_enum_blobs = enum_count; 4086 } 4087 4088 /* 4089 * NOTE: The idea seems to have been to use this to read all the blob 4090 * property values. But nothing ever added them to the corresponding 4091 * list, userspace always used the special-purpose get_blob ioctl to 4092 * read the value for a blob property. It also doesn't make a lot of 4093 * sense to return values here when everything else is just metadata for 4094 * the property itself. 4095 */ 4096 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4097 out_resp->count_enum_blobs = 0; 4098 done: 4099 drm_modeset_unlock_all(dev); 4100 return ret; 4101 } 4102 4103 /** 4104 * drm_property_create_blob - Create new blob property 4105 * 4106 * Creates a new blob property for a specified DRM device, optionally 4107 * copying data. 4108 * 4109 * @dev: DRM device to create property for 4110 * @length: Length to allocate for blob data 4111 * @data: If specified, copies data into blob 4112 * 4113 * Returns: 4114 * New blob property with a single reference on success, or an ERR_PTR 4115 * value on failure. 4116 */ 4117 struct drm_property_blob * 4118 drm_property_create_blob(struct drm_device *dev, size_t length, 4119 const void *data) 4120 { 4121 struct drm_property_blob *blob; 4122 int ret; 4123 4124 if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob)) 4125 return ERR_PTR(-EINVAL); 4126 4127 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4128 if (!blob) 4129 return ERR_PTR(-ENOMEM); 4130 4131 /* This must be explicitly initialised, so we can safely call list_del 4132 * on it in the removal handler, even if it isn't in a file list. */ 4133 INIT_LIST_HEAD(&blob->head_file); 4134 blob->length = length; 4135 blob->dev = dev; 4136 4137 if (data) 4138 memcpy(blob->data, data, length); 4139 4140 mutex_lock(&dev->mode_config.blob_lock); 4141 4142 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 4143 if (ret) { 4144 kfree(blob); 4145 mutex_unlock(&dev->mode_config.blob_lock); 4146 return ERR_PTR(-EINVAL); 4147 } 4148 4149 kref_init(&blob->refcount); 4150 4151 list_add_tail(&blob->head_global, 4152 &dev->mode_config.property_blob_list); 4153 4154 mutex_unlock(&dev->mode_config.blob_lock); 4155 4156 return blob; 4157 } 4158 EXPORT_SYMBOL(drm_property_create_blob); 4159 4160 /** 4161 * drm_property_free_blob - Blob property destructor 4162 * 4163 * Internal free function for blob properties; must not be used directly. 4164 * 4165 * @kref: Reference 4166 */ 4167 static void drm_property_free_blob(struct kref *kref) 4168 { 4169 struct drm_property_blob *blob = 4170 container_of(kref, struct drm_property_blob, refcount); 4171 4172 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock)); 4173 4174 list_del(&blob->head_global); 4175 list_del(&blob->head_file); 4176 drm_mode_object_put(blob->dev, &blob->base); 4177 4178 kfree(blob); 4179 } 4180 4181 /** 4182 * drm_property_unreference_blob - Unreference a blob property 4183 * 4184 * Drop a reference on a blob property. May free the object. 4185 * 4186 * @blob: Pointer to blob property 4187 */ 4188 void drm_property_unreference_blob(struct drm_property_blob *blob) 4189 { 4190 struct drm_device *dev; 4191 4192 if (!blob) 4193 return; 4194 4195 dev = blob->dev; 4196 4197 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4198 4199 if (kref_put_mutex(&blob->refcount, drm_property_free_blob, 4200 &dev->mode_config.blob_lock)) 4201 mutex_unlock(&dev->mode_config.blob_lock); 4202 else 4203 might_lock(&dev->mode_config.blob_lock); 4204 } 4205 EXPORT_SYMBOL(drm_property_unreference_blob); 4206 4207 /** 4208 * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held 4209 * 4210 * Drop a reference on a blob property. May free the object. This must be 4211 * called with blob_lock held. 4212 * 4213 * @blob: Pointer to blob property 4214 */ 4215 static void drm_property_unreference_blob_locked(struct drm_property_blob *blob) 4216 { 4217 if (!blob) 4218 return; 4219 4220 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4221 4222 kref_put(&blob->refcount, drm_property_free_blob); 4223 } 4224 4225 /** 4226 * drm_property_destroy_user_blobs - destroy all blobs created by this client 4227 * @dev: DRM device 4228 * @file_priv: destroy all blobs owned by this file handle 4229 */ 4230 void drm_property_destroy_user_blobs(struct drm_device *dev, 4231 struct drm_file *file_priv) 4232 { 4233 struct drm_property_blob *blob, *bt; 4234 4235 mutex_lock(&dev->mode_config.blob_lock); 4236 4237 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) { 4238 list_del_init(&blob->head_file); 4239 drm_property_unreference_blob_locked(blob); 4240 } 4241 4242 mutex_unlock(&dev->mode_config.blob_lock); 4243 } 4244 4245 /** 4246 * drm_property_reference_blob - Take a reference on an existing property 4247 * 4248 * Take a new reference on an existing blob property. 4249 * 4250 * @blob: Pointer to blob property 4251 */ 4252 struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob) 4253 { 4254 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4255 kref_get(&blob->refcount); 4256 return blob; 4257 } 4258 EXPORT_SYMBOL(drm_property_reference_blob); 4259 4260 /* 4261 * Like drm_property_lookup_blob, but does not return an additional reference. 4262 * Must be called with blob_lock held. 4263 */ 4264 static struct drm_property_blob *__drm_property_lookup_blob(struct drm_device *dev, 4265 uint32_t id) 4266 { 4267 struct drm_mode_object *obj = NULL; 4268 struct drm_property_blob *blob; 4269 4270 WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock)); 4271 4272 mutex_lock(&dev->mode_config.idr_mutex); 4273 obj = idr_find(&dev->mode_config.crtc_idr, id); 4274 if (!obj || (obj->type != DRM_MODE_OBJECT_BLOB) || (obj->id != id)) 4275 blob = NULL; 4276 else 4277 blob = obj_to_blob(obj); 4278 mutex_unlock(&dev->mode_config.idr_mutex); 4279 4280 return blob; 4281 } 4282 4283 /** 4284 * drm_property_lookup_blob - look up a blob property and take a reference 4285 * @dev: drm device 4286 * @id: id of the blob property 4287 * 4288 * If successful, this takes an additional reference to the blob property. 4289 * callers need to make sure to eventually unreference the returned property 4290 * again, using @drm_property_unreference_blob. 4291 */ 4292 struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev, 4293 uint32_t id) 4294 { 4295 struct drm_property_blob *blob; 4296 4297 mutex_lock(&dev->mode_config.blob_lock); 4298 blob = __drm_property_lookup_blob(dev, id); 4299 if (blob) { 4300 if (!kref_get_unless_zero(&blob->refcount)) 4301 blob = NULL; 4302 } 4303 mutex_unlock(&dev->mode_config.blob_lock); 4304 4305 return blob; 4306 } 4307 EXPORT_SYMBOL(drm_property_lookup_blob); 4308 4309 /** 4310 * drm_property_replace_global_blob - atomically replace existing blob property 4311 * @dev: drm device 4312 * @replace: location of blob property pointer to be replaced 4313 * @length: length of data for new blob, or 0 for no data 4314 * @data: content for new blob, or NULL for no data 4315 * @obj_holds_id: optional object for property holding blob ID 4316 * @prop_holds_id: optional property holding blob ID 4317 * @return 0 on success or error on failure 4318 * 4319 * This function will atomically replace a global property in the blob list, 4320 * optionally updating a property which holds the ID of that property. It is 4321 * guaranteed to be atomic: no caller will be allowed to see intermediate 4322 * results, and either the entire operation will succeed and clean up the 4323 * previous property, or it will fail and the state will be unchanged. 4324 * 4325 * If length is 0 or data is NULL, no new blob will be created, and the holding 4326 * property, if specified, will be set to 0. 4327 * 4328 * Access to the replace pointer is assumed to be protected by the caller, e.g. 4329 * by holding the relevant modesetting object lock for its parent. 4330 * 4331 * For example, a drm_connector has a 'PATH' property, which contains the ID 4332 * of a blob property with the value of the MST path information. Calling this 4333 * function with replace pointing to the connector's path_blob_ptr, length and 4334 * data set for the new path information, obj_holds_id set to the connector's 4335 * base object, and prop_holds_id set to the path property name, will perform 4336 * a completely atomic update. The access to path_blob_ptr is protected by the 4337 * caller holding a lock on the connector. 4338 */ 4339 static int drm_property_replace_global_blob(struct drm_device *dev, 4340 struct drm_property_blob **replace, 4341 size_t length, 4342 const void *data, 4343 struct drm_mode_object *obj_holds_id, 4344 struct drm_property *prop_holds_id) 4345 { 4346 struct drm_property_blob *new_blob = NULL; 4347 struct drm_property_blob *old_blob = NULL; 4348 int ret; 4349 4350 WARN_ON(replace == NULL); 4351 4352 old_blob = *replace; 4353 4354 if (length && data) { 4355 new_blob = drm_property_create_blob(dev, length, data); 4356 if (IS_ERR(new_blob)) 4357 return PTR_ERR(new_blob); 4358 } 4359 4360 /* This does not need to be synchronised with blob_lock, as the 4361 * get_properties ioctl locks all modesetting objects, and 4362 * obj_holds_id must be locked before calling here, so we cannot 4363 * have its value out of sync with the list membership modified 4364 * below under blob_lock. */ 4365 if (obj_holds_id) { 4366 ret = drm_object_property_set_value(obj_holds_id, 4367 prop_holds_id, 4368 new_blob ? 4369 new_blob->base.id : 0); 4370 if (ret != 0) 4371 goto err_created; 4372 } 4373 4374 drm_property_unreference_blob(old_blob); 4375 *replace = new_blob; 4376 4377 return 0; 4378 4379 err_created: 4380 drm_property_unreference_blob(new_blob); 4381 return ret; 4382 } 4383 4384 /** 4385 * drm_mode_getblob_ioctl - get the contents of a blob property value 4386 * @dev: DRM device 4387 * @data: ioctl data 4388 * @file_priv: DRM file info 4389 * 4390 * This function retrieves the contents of a blob property. The value stored in 4391 * an object's blob property is just a normal modeset object id. 4392 * 4393 * Called by the user via ioctl. 4394 * 4395 * Returns: 4396 * Zero on success, negative errno on failure. 4397 */ 4398 int drm_mode_getblob_ioctl(struct drm_device *dev, 4399 void *data, struct drm_file *file_priv) 4400 { 4401 struct drm_mode_get_blob *out_resp = data; 4402 struct drm_property_blob *blob; 4403 int ret = 0; 4404 void __user *blob_ptr; 4405 4406 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4407 return -EINVAL; 4408 4409 drm_modeset_lock_all(dev); 4410 mutex_lock(&dev->mode_config.blob_lock); 4411 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4412 if (!blob) { 4413 ret = -ENOENT; 4414 goto done; 4415 } 4416 4417 if (out_resp->length == blob->length) { 4418 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4419 if (copy_to_user(blob_ptr, blob->data, blob->length)) { 4420 ret = -EFAULT; 4421 goto done; 4422 } 4423 } 4424 out_resp->length = blob->length; 4425 4426 done: 4427 mutex_unlock(&dev->mode_config.blob_lock); 4428 drm_modeset_unlock_all(dev); 4429 return ret; 4430 } 4431 4432 /** 4433 * drm_mode_createblob_ioctl - create a new blob property 4434 * @dev: DRM device 4435 * @data: ioctl data 4436 * @file_priv: DRM file info 4437 * 4438 * This function creates a new blob property with user-defined values. In order 4439 * to give us sensible validation and checking when creating, rather than at 4440 * every potential use, we also require a type to be provided upfront. 4441 * 4442 * Called by the user via ioctl. 4443 * 4444 * Returns: 4445 * Zero on success, negative errno on failure. 4446 */ 4447 int drm_mode_createblob_ioctl(struct drm_device *dev, 4448 void *data, struct drm_file *file_priv) 4449 { 4450 struct drm_mode_create_blob *out_resp = data; 4451 struct drm_property_blob *blob; 4452 void __user *blob_ptr; 4453 int ret = 0; 4454 4455 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4456 return -EINVAL; 4457 4458 blob = drm_property_create_blob(dev, out_resp->length, NULL); 4459 if (IS_ERR(blob)) 4460 return PTR_ERR(blob); 4461 4462 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4463 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) { 4464 ret = -EFAULT; 4465 goto out_blob; 4466 } 4467 4468 /* Dropping the lock between create_blob and our access here is safe 4469 * as only the same file_priv can remove the blob; at this point, it is 4470 * not associated with any file_priv. */ 4471 mutex_lock(&dev->mode_config.blob_lock); 4472 out_resp->blob_id = blob->base.id; 4473 list_add_tail(&blob->head_file, &file_priv->blobs); 4474 mutex_unlock(&dev->mode_config.blob_lock); 4475 4476 return 0; 4477 4478 out_blob: 4479 drm_property_unreference_blob(blob); 4480 return ret; 4481 } 4482 4483 /** 4484 * drm_mode_destroyblob_ioctl - destroy a user blob property 4485 * @dev: DRM device 4486 * @data: ioctl data 4487 * @file_priv: DRM file info 4488 * 4489 * Destroy an existing user-defined blob property. 4490 * 4491 * Called by the user via ioctl. 4492 * 4493 * Returns: 4494 * Zero on success, negative errno on failure. 4495 */ 4496 int drm_mode_destroyblob_ioctl(struct drm_device *dev, 4497 void *data, struct drm_file *file_priv) 4498 { 4499 struct drm_mode_destroy_blob *out_resp = data; 4500 struct drm_property_blob *blob = NULL, *bt; 4501 bool found = false; 4502 int ret = 0; 4503 4504 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4505 return -EINVAL; 4506 4507 mutex_lock(&dev->mode_config.blob_lock); 4508 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4509 if (!blob) { 4510 ret = -ENOENT; 4511 goto err; 4512 } 4513 4514 /* Ensure the property was actually created by this user. */ 4515 list_for_each_entry(bt, &file_priv->blobs, head_file) { 4516 if (bt == blob) { 4517 found = true; 4518 break; 4519 } 4520 } 4521 4522 if (!found) { 4523 ret = -EPERM; 4524 goto err; 4525 } 4526 4527 /* We must drop head_file here, because we may not be the last 4528 * reference on the blob. */ 4529 list_del_init(&blob->head_file); 4530 drm_property_unreference_blob_locked(blob); 4531 mutex_unlock(&dev->mode_config.blob_lock); 4532 4533 return 0; 4534 4535 err: 4536 mutex_unlock(&dev->mode_config.blob_lock); 4537 return ret; 4538 } 4539 4540 /** 4541 * drm_mode_connector_set_path_property - set tile property on connector 4542 * @connector: connector to set property on. 4543 * @path: path to use for property; must not be NULL. 4544 * 4545 * This creates a property to expose to userspace to specify a 4546 * connector path. This is mainly used for DisplayPort MST where 4547 * connectors have a topology and we want to allow userspace to give 4548 * them more meaningful names. 4549 * 4550 * Returns: 4551 * Zero on success, negative errno on failure. 4552 */ 4553 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4554 const char *path) 4555 { 4556 struct drm_device *dev = connector->dev; 4557 int ret; 4558 4559 ret = drm_property_replace_global_blob(dev, 4560 &connector->path_blob_ptr, 4561 strlen(path) + 1, 4562 path, 4563 &connector->base, 4564 dev->mode_config.path_property); 4565 return ret; 4566 } 4567 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4568 4569 /** 4570 * drm_mode_connector_set_tile_property - set tile property on connector 4571 * @connector: connector to set property on. 4572 * 4573 * This looks up the tile information for a connector, and creates a 4574 * property for userspace to parse if it exists. The property is of 4575 * the form of 8 integers using ':' as a separator. 4576 * 4577 * Returns: 4578 * Zero on success, errno on failure. 4579 */ 4580 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4581 { 4582 struct drm_device *dev = connector->dev; 4583 char tile[256]; 4584 int ret; 4585 4586 if (!connector->has_tile) { 4587 ret = drm_property_replace_global_blob(dev, 4588 &connector->tile_blob_ptr, 4589 0, 4590 NULL, 4591 &connector->base, 4592 dev->mode_config.tile_property); 4593 return ret; 4594 } 4595 4596 ksnprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4597 connector->tile_group->id, connector->tile_is_single_monitor, 4598 connector->num_h_tile, connector->num_v_tile, 4599 connector->tile_h_loc, connector->tile_v_loc, 4600 connector->tile_h_size, connector->tile_v_size); 4601 4602 ret = drm_property_replace_global_blob(dev, 4603 &connector->tile_blob_ptr, 4604 strlen(tile) + 1, 4605 tile, 4606 &connector->base, 4607 dev->mode_config.tile_property); 4608 return ret; 4609 } 4610 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4611 4612 /** 4613 * drm_mode_connector_update_edid_property - update the edid property of a connector 4614 * @connector: drm connector 4615 * @edid: new value of the edid property 4616 * 4617 * This function creates a new blob modeset object and assigns its id to the 4618 * connector's edid property. 4619 * 4620 * Returns: 4621 * Zero on success, negative errno on failure. 4622 */ 4623 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4624 const struct edid *edid) 4625 { 4626 struct drm_device *dev = connector->dev; 4627 size_t size = 0; 4628 int ret; 4629 4630 /* ignore requests to set edid when overridden */ 4631 if (connector->override_edid) 4632 return 0; 4633 4634 if (edid) 4635 size = EDID_LENGTH * (1 + edid->extensions); 4636 4637 ret = drm_property_replace_global_blob(dev, 4638 &connector->edid_blob_ptr, 4639 size, 4640 edid, 4641 &connector->base, 4642 dev->mode_config.edid_property); 4643 return ret; 4644 } 4645 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4646 4647 /* Some properties could refer to dynamic refcnt'd objects, or things that 4648 * need special locking to handle lifetime issues (ie. to ensure the prop 4649 * value doesn't become invalid part way through the property update due to 4650 * race). The value returned by reference via 'obj' should be passed back 4651 * to drm_property_change_valid_put() after the property is set (and the 4652 * object to which the property is attached has a chance to take it's own 4653 * reference). 4654 */ 4655 bool drm_property_change_valid_get(struct drm_property *property, 4656 uint64_t value, struct drm_mode_object **ref) 4657 { 4658 int i; 4659 4660 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4661 return false; 4662 4663 *ref = NULL; 4664 4665 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4666 if (value < property->values[0] || value > property->values[1]) 4667 return false; 4668 return true; 4669 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4670 int64_t svalue = U642I64(value); 4671 4672 if (svalue < U642I64(property->values[0]) || 4673 svalue > U642I64(property->values[1])) 4674 return false; 4675 return true; 4676 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4677 uint64_t valid_mask = 0; 4678 4679 for (i = 0; i < property->num_values; i++) 4680 valid_mask |= (1ULL << property->values[i]); 4681 return !(value & ~valid_mask); 4682 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4683 struct drm_property_blob *blob; 4684 4685 if (value == 0) 4686 return true; 4687 4688 blob = drm_property_lookup_blob(property->dev, value); 4689 if (blob) { 4690 *ref = &blob->base; 4691 return true; 4692 } else { 4693 return false; 4694 } 4695 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4696 /* a zero value for an object property translates to null: */ 4697 if (value == 0) 4698 return true; 4699 4700 /* handle refcnt'd objects specially: */ 4701 if (property->values[0] == DRM_MODE_OBJECT_FB) { 4702 struct drm_framebuffer *fb; 4703 fb = drm_framebuffer_lookup(property->dev, value); 4704 if (fb) { 4705 *ref = &fb->base; 4706 return true; 4707 } else { 4708 return false; 4709 } 4710 } else { 4711 return _object_find(property->dev, value, property->values[0]) != NULL; 4712 } 4713 } 4714 4715 for (i = 0; i < property->num_values; i++) 4716 if (property->values[i] == value) 4717 return true; 4718 return false; 4719 } 4720 4721 void drm_property_change_valid_put(struct drm_property *property, 4722 struct drm_mode_object *ref) 4723 { 4724 if (!ref) 4725 return; 4726 4727 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4728 if (property->values[0] == DRM_MODE_OBJECT_FB) 4729 drm_framebuffer_unreference(obj_to_fb(ref)); 4730 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4731 drm_property_unreference_blob(obj_to_blob(ref)); 4732 } 4733 4734 /** 4735 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4736 * @dev: DRM device 4737 * @data: ioctl data 4738 * @file_priv: DRM file info 4739 * 4740 * This function sets the current value for a connectors's property. It also 4741 * calls into a driver's ->set_property callback to update the hardware state 4742 * 4743 * Called by the user via ioctl. 4744 * 4745 * Returns: 4746 * Zero on success, negative errno on failure. 4747 */ 4748 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4749 void *data, struct drm_file *file_priv) 4750 { 4751 struct drm_mode_connector_set_property *conn_set_prop = data; 4752 struct drm_mode_obj_set_property obj_set_prop = { 4753 .value = conn_set_prop->value, 4754 .prop_id = conn_set_prop->prop_id, 4755 .obj_id = conn_set_prop->connector_id, 4756 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4757 }; 4758 4759 /* It does all the locking and checking we need */ 4760 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4761 } 4762 4763 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4764 struct drm_property *property, 4765 uint64_t value) 4766 { 4767 int ret = -EINVAL; 4768 struct drm_connector *connector = obj_to_connector(obj); 4769 4770 /* Do DPMS ourselves */ 4771 if (property == connector->dev->mode_config.dpms_property) { 4772 ret = 0; 4773 if (connector->funcs->dpms) 4774 ret = (*connector->funcs->dpms)(connector, (int)value); 4775 } else if (connector->funcs->set_property) 4776 ret = connector->funcs->set_property(connector, property, value); 4777 4778 /* store the property value if successful */ 4779 if (!ret) 4780 drm_object_property_set_value(&connector->base, property, value); 4781 return ret; 4782 } 4783 4784 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4785 struct drm_property *property, 4786 uint64_t value) 4787 { 4788 int ret = -EINVAL; 4789 struct drm_crtc *crtc = obj_to_crtc(obj); 4790 4791 if (crtc->funcs->set_property) 4792 ret = crtc->funcs->set_property(crtc, property, value); 4793 if (!ret) 4794 drm_object_property_set_value(obj, property, value); 4795 4796 return ret; 4797 } 4798 4799 /** 4800 * drm_mode_plane_set_obj_prop - set the value of a property 4801 * @plane: drm plane object to set property value for 4802 * @property: property to set 4803 * @value: value the property should be set to 4804 * 4805 * This functions sets a given property on a given plane object. This function 4806 * calls the driver's ->set_property callback and changes the software state of 4807 * the property if the callback succeeds. 4808 * 4809 * Returns: 4810 * Zero on success, error code on failure. 4811 */ 4812 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4813 struct drm_property *property, 4814 uint64_t value) 4815 { 4816 int ret = -EINVAL; 4817 struct drm_mode_object *obj = &plane->base; 4818 4819 if (plane->funcs->set_property) 4820 ret = plane->funcs->set_property(plane, property, value); 4821 if (!ret) 4822 drm_object_property_set_value(obj, property, value); 4823 4824 return ret; 4825 } 4826 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4827 4828 /** 4829 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 4830 * @dev: DRM device 4831 * @data: ioctl data 4832 * @file_priv: DRM file info 4833 * 4834 * This function retrieves the current value for an object's property. Compared 4835 * to the connector specific ioctl this one is extended to also work on crtc and 4836 * plane objects. 4837 * 4838 * Called by the user via ioctl. 4839 * 4840 * Returns: 4841 * Zero on success, negative errno on failure. 4842 */ 4843 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4844 struct drm_file *file_priv) 4845 { 4846 struct drm_mode_obj_get_properties *arg = data; 4847 struct drm_mode_object *obj; 4848 int ret = 0; 4849 4850 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4851 return -EINVAL; 4852 4853 drm_modeset_lock_all(dev); 4854 4855 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4856 if (!obj) { 4857 ret = -ENOENT; 4858 goto out; 4859 } 4860 if (!obj->properties) { 4861 ret = -EINVAL; 4862 goto out; 4863 } 4864 4865 ret = get_properties(obj, file_priv->atomic, 4866 (uint32_t __user *)(unsigned long)(arg->props_ptr), 4867 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), 4868 &arg->count_props); 4869 4870 out: 4871 drm_modeset_unlock_all(dev); 4872 return ret; 4873 } 4874 4875 /** 4876 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 4877 * @dev: DRM device 4878 * @data: ioctl data 4879 * @file_priv: DRM file info 4880 * 4881 * This function sets the current value for an object's property. It also calls 4882 * into a driver's ->set_property callback to update the hardware state. 4883 * Compared to the connector specific ioctl this one is extended to also work on 4884 * crtc and plane objects. 4885 * 4886 * Called by the user via ioctl. 4887 * 4888 * Returns: 4889 * Zero on success, negative errno on failure. 4890 */ 4891 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 4892 struct drm_file *file_priv) 4893 { 4894 struct drm_mode_obj_set_property *arg = data; 4895 struct drm_mode_object *arg_obj; 4896 struct drm_mode_object *prop_obj; 4897 struct drm_property *property; 4898 int i, ret = -EINVAL; 4899 struct drm_mode_object *ref; 4900 4901 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4902 return -EINVAL; 4903 4904 drm_modeset_lock_all(dev); 4905 4906 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4907 if (!arg_obj) { 4908 ret = -ENOENT; 4909 goto out; 4910 } 4911 if (!arg_obj->properties) 4912 goto out; 4913 4914 for (i = 0; i < arg_obj->properties->count; i++) 4915 if (arg_obj->properties->properties[i]->base.id == arg->prop_id) 4916 break; 4917 4918 if (i == arg_obj->properties->count) 4919 goto out; 4920 4921 prop_obj = drm_mode_object_find(dev, arg->prop_id, 4922 DRM_MODE_OBJECT_PROPERTY); 4923 if (!prop_obj) { 4924 ret = -ENOENT; 4925 goto out; 4926 } 4927 property = obj_to_property(prop_obj); 4928 4929 if (!drm_property_change_valid_get(property, arg->value, &ref)) 4930 goto out; 4931 4932 switch (arg_obj->type) { 4933 case DRM_MODE_OBJECT_CONNECTOR: 4934 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 4935 arg->value); 4936 break; 4937 case DRM_MODE_OBJECT_CRTC: 4938 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 4939 break; 4940 case DRM_MODE_OBJECT_PLANE: 4941 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 4942 property, arg->value); 4943 break; 4944 } 4945 4946 drm_property_change_valid_put(property, ref); 4947 4948 out: 4949 drm_modeset_unlock_all(dev); 4950 return ret; 4951 } 4952 4953 /** 4954 * drm_mode_connector_attach_encoder - attach a connector to an encoder 4955 * @connector: connector to attach 4956 * @encoder: encoder to attach @connector to 4957 * 4958 * This function links up a connector to an encoder. Note that the routing 4959 * restrictions between encoders and crtcs are exposed to userspace through the 4960 * possible_clones and possible_crtcs bitmasks. 4961 * 4962 * Returns: 4963 * Zero on success, negative errno on failure. 4964 */ 4965 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 4966 struct drm_encoder *encoder) 4967 { 4968 int i; 4969 4970 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 4971 if (connector->encoder_ids[i] == 0) { 4972 connector->encoder_ids[i] = encoder->base.id; 4973 return 0; 4974 } 4975 } 4976 return -ENOMEM; 4977 } 4978 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 4979 4980 /** 4981 * drm_mode_crtc_set_gamma_size - set the gamma table size 4982 * @crtc: CRTC to set the gamma table size for 4983 * @gamma_size: size of the gamma table 4984 * 4985 * Drivers which support gamma tables should set this to the supported gamma 4986 * table size when initializing the CRTC. Currently the drm core only supports a 4987 * fixed gamma table size. 4988 * 4989 * Returns: 4990 * Zero on success, negative errno on failure. 4991 */ 4992 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 4993 int gamma_size) 4994 { 4995 crtc->gamma_size = gamma_size; 4996 4997 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, 4998 GFP_KERNEL); 4999 if (!crtc->gamma_store) { 5000 crtc->gamma_size = 0; 5001 return -ENOMEM; 5002 } 5003 5004 return 0; 5005 } 5006 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 5007 5008 /** 5009 * drm_mode_gamma_set_ioctl - set the gamma table 5010 * @dev: DRM device 5011 * @data: ioctl data 5012 * @file_priv: DRM file info 5013 * 5014 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 5015 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 5016 * 5017 * Called by the user via ioctl. 5018 * 5019 * Returns: 5020 * Zero on success, negative errno on failure. 5021 */ 5022 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 5023 void *data, struct drm_file *file_priv) 5024 { 5025 struct drm_mode_crtc_lut *crtc_lut = data; 5026 struct drm_crtc *crtc; 5027 void *r_base, *g_base, *b_base; 5028 int size; 5029 int ret = 0; 5030 5031 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5032 return -EINVAL; 5033 5034 drm_modeset_lock_all(dev); 5035 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5036 if (!crtc) { 5037 ret = -ENOENT; 5038 goto out; 5039 } 5040 5041 if (crtc->funcs->gamma_set == NULL) { 5042 ret = -ENOSYS; 5043 goto out; 5044 } 5045 5046 /* memcpy into gamma store */ 5047 if (crtc_lut->gamma_size != crtc->gamma_size) { 5048 ret = -EINVAL; 5049 goto out; 5050 } 5051 5052 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5053 r_base = crtc->gamma_store; 5054 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 5055 ret = -EFAULT; 5056 goto out; 5057 } 5058 5059 g_base = (char *)r_base + size; 5060 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 5061 ret = -EFAULT; 5062 goto out; 5063 } 5064 5065 b_base = (char *)g_base + size; 5066 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 5067 ret = -EFAULT; 5068 goto out; 5069 } 5070 5071 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 5072 5073 out: 5074 drm_modeset_unlock_all(dev); 5075 return ret; 5076 5077 } 5078 5079 /** 5080 * drm_mode_gamma_get_ioctl - get the gamma table 5081 * @dev: DRM device 5082 * @data: ioctl data 5083 * @file_priv: DRM file info 5084 * 5085 * Copy the current gamma table into the storage provided. This also provides 5086 * the gamma table size the driver expects, which can be used to size the 5087 * allocated storage. 5088 * 5089 * Called by the user via ioctl. 5090 * 5091 * Returns: 5092 * Zero on success, negative errno on failure. 5093 */ 5094 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 5095 void *data, struct drm_file *file_priv) 5096 { 5097 struct drm_mode_crtc_lut *crtc_lut = data; 5098 struct drm_crtc *crtc; 5099 void *r_base, *g_base, *b_base; 5100 int size; 5101 int ret = 0; 5102 5103 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5104 return -EINVAL; 5105 5106 drm_modeset_lock_all(dev); 5107 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5108 if (!crtc) { 5109 ret = -ENOENT; 5110 goto out; 5111 } 5112 5113 /* memcpy into gamma store */ 5114 if (crtc_lut->gamma_size != crtc->gamma_size) { 5115 ret = -EINVAL; 5116 goto out; 5117 } 5118 5119 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5120 r_base = crtc->gamma_store; 5121 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 5122 ret = -EFAULT; 5123 goto out; 5124 } 5125 5126 g_base = (char *)r_base + size; 5127 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 5128 ret = -EFAULT; 5129 goto out; 5130 } 5131 5132 b_base = (char *)g_base + size; 5133 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 5134 ret = -EFAULT; 5135 goto out; 5136 } 5137 out: 5138 drm_modeset_unlock_all(dev); 5139 return ret; 5140 } 5141 5142 #ifdef __DragonFly__ 5143 /* 5144 * The Linux layer version of kfree() is a macro and can't be called 5145 * directly via a function pointer 5146 */ 5147 static void 5148 drm_crtc_event_destroy(struct drm_pending_event *e) 5149 { 5150 kfree(e); 5151 } 5152 #endif 5153 5154 /** 5155 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 5156 * @dev: DRM device 5157 * @data: ioctl data 5158 * @file_priv: DRM file info 5159 * 5160 * This schedules an asynchronous update on a given CRTC, called page flip. 5161 * Optionally a drm event is generated to signal the completion of the event. 5162 * Generic drivers cannot assume that a pageflip with changed framebuffer 5163 * properties (including driver specific metadata like tiling layout) will work, 5164 * but some drivers support e.g. pixel format changes through the pageflip 5165 * ioctl. 5166 * 5167 * Called by the user via ioctl. 5168 * 5169 * Returns: 5170 * Zero on success, negative errno on failure. 5171 */ 5172 int drm_mode_page_flip_ioctl(struct drm_device *dev, 5173 void *data, struct drm_file *file_priv) 5174 { 5175 struct drm_mode_crtc_page_flip *page_flip = data; 5176 struct drm_crtc *crtc; 5177 struct drm_framebuffer *fb = NULL; 5178 struct drm_pending_vblank_event *e = NULL; 5179 unsigned long flags; 5180 int ret = -EINVAL; 5181 5182 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 5183 page_flip->reserved != 0) 5184 return -EINVAL; 5185 5186 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 5187 return -EINVAL; 5188 5189 crtc = drm_crtc_find(dev, page_flip->crtc_id); 5190 if (!crtc) 5191 return -ENOENT; 5192 5193 drm_modeset_lock_crtc(crtc, crtc->primary); 5194 if (crtc->primary->fb == NULL) { 5195 /* The framebuffer is currently unbound, presumably 5196 * due to a hotplug event, that userspace has not 5197 * yet discovered. 5198 */ 5199 ret = -EBUSY; 5200 goto out; 5201 } 5202 5203 if (crtc->funcs->page_flip == NULL) 5204 goto out; 5205 5206 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 5207 if (!fb) { 5208 ret = -ENOENT; 5209 goto out; 5210 } 5211 5212 if (crtc->state) { 5213 const struct drm_plane_state *state = crtc->primary->state; 5214 5215 ret = check_src_coords(state->src_x, state->src_y, 5216 state->src_w, state->src_h, fb); 5217 } else { 5218 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 5219 } 5220 if (ret) 5221 goto out; 5222 5223 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 5224 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 5225 ret = -EINVAL; 5226 goto out; 5227 } 5228 5229 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5230 ret = -ENOMEM; 5231 spin_lock_irqsave(&dev->event_lock, flags); 5232 if (file_priv->event_space < sizeof(e->event)) { 5233 spin_unlock_irqrestore(&dev->event_lock, flags); 5234 goto out; 5235 } 5236 file_priv->event_space -= sizeof(e->event); 5237 spin_unlock_irqrestore(&dev->event_lock, flags); 5238 5239 e = kzalloc(sizeof(*e), GFP_KERNEL); 5240 if (e == NULL) { 5241 spin_lock_irqsave(&dev->event_lock, flags); 5242 file_priv->event_space += sizeof(e->event); 5243 spin_unlock_irqrestore(&dev->event_lock, flags); 5244 goto out; 5245 } 5246 5247 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 5248 e->event.base.length = sizeof(e->event); 5249 e->event.user_data = page_flip->user_data; 5250 e->base.event = &e->event.base; 5251 e->base.file_priv = file_priv; 5252 #ifdef __DragonFly__ 5253 e->base.destroy = drm_crtc_event_destroy; 5254 #else 5255 e->base.destroy = 5256 (void (*) (struct drm_pending_event *)) kfree; 5257 #endif 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 connector->status = connector_status_unknown; 5318 5319 if (connector->funcs->reset) 5320 connector->funcs->reset(connector); 5321 } 5322 mutex_unlock(&dev->mode_config.mutex); 5323 } 5324 EXPORT_SYMBOL(drm_mode_config_reset); 5325 5326 /** 5327 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 5328 * @dev: DRM device 5329 * @data: ioctl data 5330 * @file_priv: DRM file info 5331 * 5332 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 5333 * TTM or something else entirely) and returns the resulting buffer handle. This 5334 * handle can then be wrapped up into a framebuffer modeset object. 5335 * 5336 * Note that userspace is not allowed to use such objects for render 5337 * acceleration - drivers must create their own private ioctls for such a use 5338 * case. 5339 * 5340 * Called by the user via ioctl. 5341 * 5342 * Returns: 5343 * Zero on success, negative errno on failure. 5344 */ 5345 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 5346 void *data, struct drm_file *file_priv) 5347 { 5348 struct drm_mode_create_dumb *args = data; 5349 u32 cpp, stride, size; 5350 5351 if (!dev->driver->dumb_create) 5352 return -ENOSYS; 5353 if (!args->width || !args->height || !args->bpp) 5354 return -EINVAL; 5355 5356 /* overflow checks for 32bit size calculations */ 5357 /* NOTE: DIV_ROUND_UP() can overflow */ 5358 cpp = DIV_ROUND_UP(args->bpp, 8); 5359 if (!cpp || cpp > 0xffffffffU / args->width) 5360 return -EINVAL; 5361 stride = cpp * args->width; 5362 if (args->height > 0xffffffffU / stride) 5363 return -EINVAL; 5364 5365 /* test for wrap-around */ 5366 size = args->height * stride; 5367 if (PAGE_ALIGN(size) == 0) 5368 return -EINVAL; 5369 5370 /* 5371 * handle, pitch and size are output parameters. Zero them out to 5372 * prevent drivers from accidentally using uninitialized data. Since 5373 * not all existing userspace is clearing these fields properly we 5374 * cannot reject IOCTL with garbage in them. 5375 */ 5376 args->handle = 0; 5377 args->pitch = 0; 5378 args->size = 0; 5379 5380 return dev->driver->dumb_create(file_priv, dev, args); 5381 } 5382 5383 /** 5384 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 5385 * @dev: DRM device 5386 * @data: ioctl data 5387 * @file_priv: DRM file info 5388 * 5389 * Allocate an offset in the drm device node's address space to be able to 5390 * memory map a dumb buffer. 5391 * 5392 * Called by the user via ioctl. 5393 * 5394 * Returns: 5395 * Zero on success, negative errno on failure. 5396 */ 5397 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 5398 void *data, struct drm_file *file_priv) 5399 { 5400 struct drm_mode_map_dumb *args = data; 5401 5402 /* call driver ioctl to get mmap offset */ 5403 if (!dev->driver->dumb_map_offset) 5404 return -ENOSYS; 5405 5406 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 5407 } 5408 5409 /** 5410 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 5411 * @dev: DRM device 5412 * @data: ioctl data 5413 * @file_priv: DRM file info 5414 * 5415 * This destroys the userspace handle for the given dumb backing storage buffer. 5416 * Since buffer objects must be reference counted in the kernel a buffer object 5417 * won't be immediately freed if a framebuffer modeset object still uses it. 5418 * 5419 * Called by the user via ioctl. 5420 * 5421 * Returns: 5422 * Zero on success, negative errno on failure. 5423 */ 5424 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 5425 void *data, struct drm_file *file_priv) 5426 { 5427 struct drm_mode_destroy_dumb *args = data; 5428 5429 if (!dev->driver->dumb_destroy) 5430 return -ENOSYS; 5431 5432 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 5433 } 5434 5435 /** 5436 * drm_fb_get_bpp_depth - get the bpp/depth values for format 5437 * @format: pixel format (DRM_FORMAT_*) 5438 * @depth: storage for the depth value 5439 * @bpp: storage for the bpp value 5440 * 5441 * This only supports RGB formats here for compat with code that doesn't use 5442 * pixel formats directly yet. 5443 */ 5444 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 5445 int *bpp) 5446 { 5447 switch (format) { 5448 case DRM_FORMAT_C8: 5449 case DRM_FORMAT_RGB332: 5450 case DRM_FORMAT_BGR233: 5451 *depth = 8; 5452 *bpp = 8; 5453 break; 5454 case DRM_FORMAT_XRGB1555: 5455 case DRM_FORMAT_XBGR1555: 5456 case DRM_FORMAT_RGBX5551: 5457 case DRM_FORMAT_BGRX5551: 5458 case DRM_FORMAT_ARGB1555: 5459 case DRM_FORMAT_ABGR1555: 5460 case DRM_FORMAT_RGBA5551: 5461 case DRM_FORMAT_BGRA5551: 5462 *depth = 15; 5463 *bpp = 16; 5464 break; 5465 case DRM_FORMAT_RGB565: 5466 case DRM_FORMAT_BGR565: 5467 *depth = 16; 5468 *bpp = 16; 5469 break; 5470 case DRM_FORMAT_RGB888: 5471 case DRM_FORMAT_BGR888: 5472 *depth = 24; 5473 *bpp = 24; 5474 break; 5475 case DRM_FORMAT_XRGB8888: 5476 case DRM_FORMAT_XBGR8888: 5477 case DRM_FORMAT_RGBX8888: 5478 case DRM_FORMAT_BGRX8888: 5479 *depth = 24; 5480 *bpp = 32; 5481 break; 5482 case DRM_FORMAT_XRGB2101010: 5483 case DRM_FORMAT_XBGR2101010: 5484 case DRM_FORMAT_RGBX1010102: 5485 case DRM_FORMAT_BGRX1010102: 5486 case DRM_FORMAT_ARGB2101010: 5487 case DRM_FORMAT_ABGR2101010: 5488 case DRM_FORMAT_RGBA1010102: 5489 case DRM_FORMAT_BGRA1010102: 5490 *depth = 30; 5491 *bpp = 32; 5492 break; 5493 case DRM_FORMAT_ARGB8888: 5494 case DRM_FORMAT_ABGR8888: 5495 case DRM_FORMAT_RGBA8888: 5496 case DRM_FORMAT_BGRA8888: 5497 *depth = 32; 5498 *bpp = 32; 5499 break; 5500 default: 5501 DRM_DEBUG_KMS("unsupported pixel format %s\n", 5502 drm_get_format_name(format)); 5503 *depth = 0; 5504 *bpp = 0; 5505 break; 5506 } 5507 } 5508 EXPORT_SYMBOL(drm_fb_get_bpp_depth); 5509 5510 /** 5511 * drm_format_num_planes - get the number of planes for format 5512 * @format: pixel format (DRM_FORMAT_*) 5513 * 5514 * Returns: 5515 * The number of planes used by the specified pixel format. 5516 */ 5517 int drm_format_num_planes(uint32_t format) 5518 { 5519 switch (format) { 5520 case DRM_FORMAT_YUV410: 5521 case DRM_FORMAT_YVU410: 5522 case DRM_FORMAT_YUV411: 5523 case DRM_FORMAT_YVU411: 5524 case DRM_FORMAT_YUV420: 5525 case DRM_FORMAT_YVU420: 5526 case DRM_FORMAT_YUV422: 5527 case DRM_FORMAT_YVU422: 5528 case DRM_FORMAT_YUV444: 5529 case DRM_FORMAT_YVU444: 5530 return 3; 5531 case DRM_FORMAT_NV12: 5532 case DRM_FORMAT_NV21: 5533 case DRM_FORMAT_NV16: 5534 case DRM_FORMAT_NV61: 5535 case DRM_FORMAT_NV24: 5536 case DRM_FORMAT_NV42: 5537 return 2; 5538 default: 5539 return 1; 5540 } 5541 } 5542 EXPORT_SYMBOL(drm_format_num_planes); 5543 5544 /** 5545 * drm_format_plane_cpp - determine the bytes per pixel value 5546 * @format: pixel format (DRM_FORMAT_*) 5547 * @plane: plane index 5548 * 5549 * Returns: 5550 * The bytes per pixel value for the specified plane. 5551 */ 5552 int drm_format_plane_cpp(uint32_t format, int plane) 5553 { 5554 unsigned int depth; 5555 int bpp; 5556 5557 if (plane >= drm_format_num_planes(format)) 5558 return 0; 5559 5560 switch (format) { 5561 case DRM_FORMAT_YUYV: 5562 case DRM_FORMAT_YVYU: 5563 case DRM_FORMAT_UYVY: 5564 case DRM_FORMAT_VYUY: 5565 return 2; 5566 case DRM_FORMAT_NV12: 5567 case DRM_FORMAT_NV21: 5568 case DRM_FORMAT_NV16: 5569 case DRM_FORMAT_NV61: 5570 case DRM_FORMAT_NV24: 5571 case DRM_FORMAT_NV42: 5572 return plane ? 2 : 1; 5573 case DRM_FORMAT_YUV410: 5574 case DRM_FORMAT_YVU410: 5575 case DRM_FORMAT_YUV411: 5576 case DRM_FORMAT_YVU411: 5577 case DRM_FORMAT_YUV420: 5578 case DRM_FORMAT_YVU420: 5579 case DRM_FORMAT_YUV422: 5580 case DRM_FORMAT_YVU422: 5581 case DRM_FORMAT_YUV444: 5582 case DRM_FORMAT_YVU444: 5583 return 1; 5584 default: 5585 drm_fb_get_bpp_depth(format, &depth, &bpp); 5586 return bpp >> 3; 5587 } 5588 } 5589 EXPORT_SYMBOL(drm_format_plane_cpp); 5590 5591 /** 5592 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 5593 * @format: pixel format (DRM_FORMAT_*) 5594 * 5595 * Returns: 5596 * The horizontal chroma subsampling factor for the 5597 * specified pixel format. 5598 */ 5599 int drm_format_horz_chroma_subsampling(uint32_t format) 5600 { 5601 switch (format) { 5602 case DRM_FORMAT_YUV411: 5603 case DRM_FORMAT_YVU411: 5604 case DRM_FORMAT_YUV410: 5605 case DRM_FORMAT_YVU410: 5606 return 4; 5607 case DRM_FORMAT_YUYV: 5608 case DRM_FORMAT_YVYU: 5609 case DRM_FORMAT_UYVY: 5610 case DRM_FORMAT_VYUY: 5611 case DRM_FORMAT_NV12: 5612 case DRM_FORMAT_NV21: 5613 case DRM_FORMAT_NV16: 5614 case DRM_FORMAT_NV61: 5615 case DRM_FORMAT_YUV422: 5616 case DRM_FORMAT_YVU422: 5617 case DRM_FORMAT_YUV420: 5618 case DRM_FORMAT_YVU420: 5619 return 2; 5620 default: 5621 return 1; 5622 } 5623 } 5624 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5625 5626 /** 5627 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5628 * @format: pixel format (DRM_FORMAT_*) 5629 * 5630 * Returns: 5631 * The vertical chroma subsampling factor for the 5632 * specified pixel format. 5633 */ 5634 int drm_format_vert_chroma_subsampling(uint32_t format) 5635 { 5636 switch (format) { 5637 case DRM_FORMAT_YUV410: 5638 case DRM_FORMAT_YVU410: 5639 return 4; 5640 case DRM_FORMAT_YUV420: 5641 case DRM_FORMAT_YVU420: 5642 case DRM_FORMAT_NV12: 5643 case DRM_FORMAT_NV21: 5644 return 2; 5645 default: 5646 return 1; 5647 } 5648 } 5649 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5650 5651 /** 5652 * drm_rotation_simplify() - Try to simplify the rotation 5653 * @rotation: Rotation to be simplified 5654 * @supported_rotations: Supported rotations 5655 * 5656 * Attempt to simplify the rotation to a form that is supported. 5657 * Eg. if the hardware supports everything except DRM_REFLECT_X 5658 * one could call this function like this: 5659 * 5660 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5661 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5662 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5663 * 5664 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5665 * transforms the hardware supports, this function may not 5666 * be able to produce a supported transform, so the caller should 5667 * check the result afterwards. 5668 */ 5669 unsigned int drm_rotation_simplify(unsigned int rotation, 5670 unsigned int supported_rotations) 5671 { 5672 if (rotation & ~supported_rotations) { 5673 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5674 rotation = (rotation & DRM_REFLECT_MASK) | 5675 BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4); 5676 } 5677 5678 return rotation; 5679 } 5680 EXPORT_SYMBOL(drm_rotation_simplify); 5681 5682 /** 5683 * drm_mode_config_init - initialize DRM mode_configuration structure 5684 * @dev: DRM device 5685 * 5686 * Initialize @dev's mode_config structure, used for tracking the graphics 5687 * configuration of @dev. 5688 * 5689 * Since this initializes the modeset locks, no locking is possible. Which is no 5690 * problem, since this should happen single threaded at init time. It is the 5691 * driver's problem to ensure this guarantee. 5692 * 5693 */ 5694 void drm_mode_config_init(struct drm_device *dev) 5695 { 5696 lockinit(&dev->mode_config.mutex, "drmmcm", 0, LK_CANRECURSE); 5697 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5698 lockinit(&dev->mode_config.idr_mutex, "mcfgidr", 0, LK_CANRECURSE); 5699 lockinit(&dev->mode_config.fb_lock, "drmfbl", 0, LK_CANRECURSE); 5700 lockinit(&dev->mode_config.blob_lock, "drmcbl", 0, LK_CANRECURSE); 5701 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5702 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5703 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5704 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5705 INIT_LIST_HEAD(&dev->mode_config.property_list); 5706 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5707 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5708 idr_init(&dev->mode_config.crtc_idr); 5709 idr_init(&dev->mode_config.tile_idr); 5710 5711 drm_modeset_lock_all(dev); 5712 drm_mode_create_standard_properties(dev); 5713 drm_modeset_unlock_all(dev); 5714 5715 /* Just to be sure */ 5716 dev->mode_config.num_fb = 0; 5717 dev->mode_config.num_connector = 0; 5718 dev->mode_config.num_crtc = 0; 5719 dev->mode_config.num_encoder = 0; 5720 dev->mode_config.num_overlay_plane = 0; 5721 dev->mode_config.num_total_plane = 0; 5722 } 5723 EXPORT_SYMBOL(drm_mode_config_init); 5724 5725 /** 5726 * drm_mode_config_cleanup - free up DRM mode_config info 5727 * @dev: DRM device 5728 * 5729 * Free up all the connectors and CRTCs associated with this DRM device, then 5730 * free up the framebuffers and associated buffer objects. 5731 * 5732 * Note that since this /should/ happen single-threaded at driver/device 5733 * teardown time, no locking is required. It's the driver's job to ensure that 5734 * this guarantee actually holds true. 5735 * 5736 * FIXME: cleanup any dangling user buffer objects too 5737 */ 5738 void drm_mode_config_cleanup(struct drm_device *dev) 5739 { 5740 struct drm_connector *connector, *ot; 5741 struct drm_crtc *crtc, *ct; 5742 struct drm_encoder *encoder, *enct; 5743 struct drm_framebuffer *fb, *fbt; 5744 struct drm_property *property, *pt; 5745 struct drm_property_blob *blob, *bt; 5746 struct drm_plane *plane, *plt; 5747 5748 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5749 head) { 5750 encoder->funcs->destroy(encoder); 5751 } 5752 5753 list_for_each_entry_safe(connector, ot, 5754 &dev->mode_config.connector_list, head) { 5755 connector->funcs->destroy(connector); 5756 } 5757 5758 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5759 head) { 5760 drm_property_destroy(dev, property); 5761 } 5762 5763 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5764 head_global) { 5765 drm_property_unreference_blob(blob); 5766 } 5767 5768 /* 5769 * Single-threaded teardown context, so it's not required to grab the 5770 * fb_lock to protect against concurrent fb_list access. Contrary, it 5771 * would actually deadlock with the drm_framebuffer_cleanup function. 5772 * 5773 * Also, if there are any framebuffers left, that's a driver leak now, 5774 * so politely WARN about this. 5775 */ 5776 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5777 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5778 drm_framebuffer_free(&fb->refcount); 5779 } 5780 5781 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5782 head) { 5783 plane->funcs->destroy(plane); 5784 } 5785 5786 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5787 crtc->funcs->destroy(crtc); 5788 } 5789 5790 idr_destroy(&dev->mode_config.tile_idr); 5791 idr_destroy(&dev->mode_config.crtc_idr); 5792 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5793 } 5794 EXPORT_SYMBOL(drm_mode_config_cleanup); 5795 5796 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5797 unsigned int supported_rotations) 5798 { 5799 static const struct drm_prop_enum_list props[] = { 5800 { DRM_ROTATE_0, "rotate-0" }, 5801 { DRM_ROTATE_90, "rotate-90" }, 5802 { DRM_ROTATE_180, "rotate-180" }, 5803 { DRM_ROTATE_270, "rotate-270" }, 5804 { DRM_REFLECT_X, "reflect-x" }, 5805 { DRM_REFLECT_Y, "reflect-y" }, 5806 }; 5807 5808 return drm_property_create_bitmask(dev, 0, "rotation", 5809 props, ARRAY_SIZE(props), 5810 supported_rotations); 5811 } 5812 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5813 5814 /** 5815 * DOC: Tile group 5816 * 5817 * Tile groups are used to represent tiled monitors with a unique 5818 * integer identifier. Tiled monitors using DisplayID v1.3 have 5819 * a unique 8-byte handle, we store this in a tile group, so we 5820 * have a common identifier for all tiles in a monitor group. 5821 */ 5822 static void drm_tile_group_free(struct kref *kref) 5823 { 5824 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5825 struct drm_device *dev = tg->dev; 5826 mutex_lock(&dev->mode_config.idr_mutex); 5827 idr_remove(&dev->mode_config.tile_idr, tg->id); 5828 mutex_unlock(&dev->mode_config.idr_mutex); 5829 kfree(tg); 5830 } 5831 5832 /** 5833 * drm_mode_put_tile_group - drop a reference to a tile group. 5834 * @dev: DRM device 5835 * @tg: tile group to drop reference to. 5836 * 5837 * drop reference to tile group and free if 0. 5838 */ 5839 void drm_mode_put_tile_group(struct drm_device *dev, 5840 struct drm_tile_group *tg) 5841 { 5842 kref_put(&tg->refcount, drm_tile_group_free); 5843 } 5844 5845 /** 5846 * drm_mode_get_tile_group - get a reference to an existing tile group 5847 * @dev: DRM device 5848 * @topology: 8-bytes unique per monitor. 5849 * 5850 * Use the unique bytes to get a reference to an existing tile group. 5851 * 5852 * RETURNS: 5853 * tile group or NULL if not found. 5854 */ 5855 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 5856 char topology[8]) 5857 { 5858 #if 0 5859 struct drm_tile_group *tg; 5860 int id; 5861 mutex_lock(&dev->mode_config.idr_mutex); 5862 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 5863 if (!memcmp(tg->group_data, topology, 8)) { 5864 if (!kref_get_unless_zero(&tg->refcount)) 5865 tg = NULL; 5866 mutex_unlock(&dev->mode_config.idr_mutex); 5867 return tg; 5868 } 5869 } 5870 mutex_unlock(&dev->mode_config.idr_mutex); 5871 #endif 5872 return NULL; 5873 } 5874 EXPORT_SYMBOL(drm_mode_get_tile_group); 5875 5876 /** 5877 * drm_mode_create_tile_group - create a tile group from a displayid description 5878 * @dev: DRM device 5879 * @topology: 8-bytes unique per monitor. 5880 * 5881 * Create a tile group for the unique monitor, and get a unique 5882 * identifier for the tile group. 5883 * 5884 * RETURNS: 5885 * new tile group or error. 5886 */ 5887 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 5888 char topology[8]) 5889 { 5890 struct drm_tile_group *tg; 5891 int ret; 5892 5893 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 5894 if (!tg) 5895 return ERR_PTR(-ENOMEM); 5896 5897 kref_init(&tg->refcount); 5898 memcpy(tg->group_data, topology, 8); 5899 tg->dev = dev; 5900 5901 mutex_lock(&dev->mode_config.idr_mutex); 5902 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 5903 if (ret >= 0) { 5904 tg->id = ret; 5905 } else { 5906 kfree(tg); 5907 tg = ERR_PTR(ret); 5908 } 5909 5910 mutex_unlock(&dev->mode_config.idr_mutex); 5911 return tg; 5912 } 5913 EXPORT_SYMBOL(drm_mode_create_tile_group); 5914