drm_crtc.c revision 1.7
1 /* $NetBSD: drm_crtc.c,v 1.7 2018/08/27 06:52:24 riastradh Exp $ */ 2 3 /* 4 * Copyright (c) 2006-2008 Intel Corporation 5 * Copyright (c) 2007 Dave Airlie <airlied (at) linux.ie> 6 * Copyright (c) 2008 Red Hat Inc. 7 * 8 * DRM core CRTC related functions 9 * 10 * Permission to use, copy, modify, distribute, and sell this software and its 11 * documentation for any purpose is hereby granted without fee, provided that 12 * the above copyright notice appear in all copies and that both that copyright 13 * notice and this permission notice appear in supporting documentation, and 14 * that the name of the copyright holders not be used in advertising or 15 * publicity pertaining to distribution of the software without specific, 16 * written prior permission. The copyright holders make no representations 17 * about the suitability of this software for any purpose. It is provided "as 18 * is" without express or implied warranty. 19 * 20 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 21 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 22 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 23 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 24 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 25 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 26 * OF THIS SOFTWARE. 27 * 28 * Authors: 29 * Keith Packard 30 * Eric Anholt <eric (at) anholt.net> 31 * Dave Airlie <airlied (at) linux.ie> 32 * Jesse Barnes <jesse.barnes (at) intel.com> 33 */ 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: drm_crtc.c,v 1.7 2018/08/27 06:52:24 riastradh Exp $"); 36 37 #include <linux/err.h> 38 #include <linux/spinlock.h> 39 #include <linux/ctype.h> 40 #include <linux/list.h> 41 #include <linux/slab.h> 42 #include <linux/export.h> 43 #include <linux/errno.h> 44 #include <asm/bug.h> 45 #include <drm/drmP.h> 46 #include <drm/drm_crtc.h> 47 #include <drm/drm_edid.h> 48 #include <drm/drm_fourcc.h> 49 #include <drm/drm_modeset_lock.h> 50 #include <drm/drm_atomic.h> 51 52 #include "drm_crtc_internal.h" 53 #include "drm_internal.h" 54 55 static struct drm_framebuffer * 56 internal_framebuffer_create(struct drm_device *dev, 57 struct drm_mode_fb_cmd2 *r, 58 struct drm_file *file_priv); 59 60 /* Avoid boilerplate. I'm tired of typing. */ 61 #define DRM_ENUM_NAME_FN(fnname, list) \ 62 const char *fnname(int val) \ 63 { \ 64 int i; \ 65 for (i = 0; i < ARRAY_SIZE(list); i++) { \ 66 if (list[i].type == val) \ 67 return list[i].name; \ 68 } \ 69 return "(unknown)"; \ 70 } 71 72 /* 73 * Global properties 74 */ 75 static const struct drm_prop_enum_list drm_dpms_enum_list[] = { 76 { DRM_MODE_DPMS_ON, "On" }, 77 { DRM_MODE_DPMS_STANDBY, "Standby" }, 78 { DRM_MODE_DPMS_SUSPEND, "Suspend" }, 79 { DRM_MODE_DPMS_OFF, "Off" } 80 }; 81 82 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) 83 84 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { 85 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 86 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 87 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 88 }; 89 90 /* 91 * Optional properties 92 */ 93 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { 94 { DRM_MODE_SCALE_NONE, "None" }, 95 { DRM_MODE_SCALE_FULLSCREEN, "Full" }, 96 { DRM_MODE_SCALE_CENTER, "Center" }, 97 { DRM_MODE_SCALE_ASPECT, "Full aspect" }, 98 }; 99 100 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { 101 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, 102 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, 103 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, 104 }; 105 106 /* 107 * Non-global properties, but "required" for certain connectors. 108 */ 109 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { 110 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 111 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 112 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 113 }; 114 115 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) 116 117 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { 118 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 119 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 120 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 121 }; 122 123 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, 124 drm_dvi_i_subconnector_enum_list) 125 126 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { 127 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 128 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 129 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 130 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 131 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 132 }; 133 134 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) 135 136 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { 137 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 138 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 139 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 140 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 141 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 142 }; 143 144 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, 145 drm_tv_subconnector_enum_list) 146 147 static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = { 148 { DRM_MODE_DIRTY_OFF, "Off" }, 149 { DRM_MODE_DIRTY_ON, "On" }, 150 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" }, 151 }; 152 153 struct drm_conn_prop_enum_list { 154 int type; 155 const char *name; 156 struct ida ida; 157 }; 158 159 /* 160 * Connector and encoder types. 161 */ 162 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { 163 { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, 164 { DRM_MODE_CONNECTOR_VGA, "VGA" }, 165 { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, 166 { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, 167 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, 168 { DRM_MODE_CONNECTOR_Composite, "Composite" }, 169 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, 170 { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, 171 { DRM_MODE_CONNECTOR_Component, "Component" }, 172 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, 173 { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, 174 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, 175 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, 176 { DRM_MODE_CONNECTOR_TV, "TV" }, 177 { DRM_MODE_CONNECTOR_eDP, "eDP" }, 178 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, 179 { DRM_MODE_CONNECTOR_DSI, "DSI" }, 180 }; 181 182 static const struct drm_prop_enum_list drm_encoder_enum_list[] = { 183 { DRM_MODE_ENCODER_NONE, "None" }, 184 { DRM_MODE_ENCODER_DAC, "DAC" }, 185 { DRM_MODE_ENCODER_TMDS, "TMDS" }, 186 { DRM_MODE_ENCODER_LVDS, "LVDS" }, 187 { DRM_MODE_ENCODER_TVDAC, "TV" }, 188 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" }, 189 { DRM_MODE_ENCODER_DSI, "DSI" }, 190 { DRM_MODE_ENCODER_DPMST, "DP MST" }, 191 }; 192 193 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { 194 { SubPixelUnknown, "Unknown" }, 195 { SubPixelHorizontalRGB, "Horizontal RGB" }, 196 { SubPixelHorizontalBGR, "Horizontal BGR" }, 197 { SubPixelVerticalRGB, "Vertical RGB" }, 198 { SubPixelVerticalBGR, "Vertical BGR" }, 199 { SubPixelNone, "None" }, 200 }; 201 202 void drm_connector_ida_init(void) 203 { 204 int i; 205 206 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 207 ida_init(&drm_connector_enum_list[i].ida); 208 } 209 210 void drm_connector_ida_destroy(void) 211 { 212 int i; 213 214 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 215 ida_destroy(&drm_connector_enum_list[i].ida); 216 } 217 218 /** 219 * drm_get_connector_status_name - return a string for connector status 220 * @status: connector status to compute name of 221 * 222 * In contrast to the other drm_get_*_name functions this one here returns a 223 * const pointer and hence is threadsafe. 224 */ 225 const char *drm_get_connector_status_name(enum drm_connector_status status) 226 { 227 if (status == connector_status_connected) 228 return "connected"; 229 else if (status == connector_status_disconnected) 230 return "disconnected"; 231 else 232 return "unknown"; 233 } 234 EXPORT_SYMBOL(drm_get_connector_status_name); 235 236 /** 237 * drm_get_subpixel_order_name - return a string for a given subpixel enum 238 * @order: enum of subpixel_order 239 * 240 * Note you could abuse this and return something out of bounds, but that 241 * would be a caller error. No unscrubbed user data should make it here. 242 */ 243 const char *drm_get_subpixel_order_name(enum subpixel_order order) 244 { 245 return drm_subpixel_enum_list[order].name; 246 } 247 EXPORT_SYMBOL(drm_get_subpixel_order_name); 248 249 static char printable_char(int c) 250 { 251 return isascii(c) && isprint(c) ? c : '?'; 252 } 253 254 /** 255 * drm_get_format_name - return a string for drm fourcc format 256 * @format: format to compute name of 257 * 258 * Note that the buffer used by this function is globally shared and owned by 259 * the function itself. 260 * 261 * FIXME: This isn't really multithreading safe. 262 */ 263 const char *drm_get_format_name(uint32_t format) 264 { 265 static char buf[32]; 266 267 snprintf(buf, sizeof(buf), 268 "%c%c%c%c %s-endian (0x%08x)", 269 printable_char(format & 0xff), 270 printable_char((format >> 8) & 0xff), 271 printable_char((format >> 16) & 0xff), 272 printable_char((format >> 24) & 0x7f), 273 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", 274 format); 275 276 return buf; 277 } 278 EXPORT_SYMBOL(drm_get_format_name); 279 280 /* 281 * Internal function to assign a slot in the object idr and optionally 282 * register the object into the idr. 283 */ 284 static int drm_mode_object_get_reg(struct drm_device *dev, 285 struct drm_mode_object *obj, 286 uint32_t obj_type, 287 bool register_obj) 288 { 289 int ret; 290 291 idr_preload(GFP_KERNEL); 292 mutex_lock(&dev->mode_config.idr_mutex); 293 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); 294 if (ret >= 0) { 295 /* 296 * Set up the object linking under the protection of the idr 297 * lock so that other users can't see inconsistent state. 298 */ 299 obj->id = ret; 300 obj->type = obj_type; 301 } 302 mutex_unlock(&dev->mode_config.idr_mutex); 303 idr_preload_end(); 304 305 return ret < 0 ? ret : 0; 306 } 307 308 /** 309 * drm_mode_object_get - allocate a new modeset identifier 310 * @dev: DRM device 311 * @obj: object pointer, used to generate unique ID 312 * @obj_type: object type 313 * 314 * Create a unique identifier based on @ptr in @dev's identifier space. Used 315 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix 316 * modeset identifiers are _not_ reference counted. Hence don't use this for 317 * reference counted modeset objects like framebuffers. 318 * 319 * Returns: 320 * Zero on success, error code on failure. 321 */ 322 int drm_mode_object_get(struct drm_device *dev, 323 struct drm_mode_object *obj, uint32_t obj_type) 324 { 325 return drm_mode_object_get_reg(dev, obj, obj_type, true); 326 } 327 328 static void drm_mode_object_register(struct drm_device *dev, 329 struct drm_mode_object *obj) 330 { 331 mutex_lock(&dev->mode_config.idr_mutex); 332 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); 333 mutex_unlock(&dev->mode_config.idr_mutex); 334 } 335 336 /** 337 * drm_mode_object_put - free a modeset identifer 338 * @dev: DRM device 339 * @object: object to free 340 * 341 * Free @id from @dev's unique identifier pool. Note that despite the _get 342 * postfix modeset identifiers are _not_ reference counted. Hence don't use this 343 * for reference counted modeset objects like framebuffers. 344 */ 345 void drm_mode_object_put(struct drm_device *dev, 346 struct drm_mode_object *object) 347 { 348 mutex_lock(&dev->mode_config.idr_mutex); 349 idr_remove(&dev->mode_config.crtc_idr, object->id); 350 mutex_unlock(&dev->mode_config.idr_mutex); 351 } 352 353 static struct drm_mode_object *_object_find(struct drm_device *dev, 354 uint32_t id, uint32_t type) 355 { 356 struct drm_mode_object *obj = NULL; 357 358 mutex_lock(&dev->mode_config.idr_mutex); 359 obj = idr_find(&dev->mode_config.crtc_idr, id); 360 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) 361 obj = NULL; 362 if (obj && obj->id != id) 363 obj = NULL; 364 /* don't leak out unref'd fb's */ 365 if (obj && 366 (obj->type == DRM_MODE_OBJECT_FB || 367 obj->type == DRM_MODE_OBJECT_BLOB)) 368 obj = NULL; 369 mutex_unlock(&dev->mode_config.idr_mutex); 370 371 return obj; 372 } 373 374 /** 375 * drm_mode_object_find - look up a drm object with static lifetime 376 * @dev: drm device 377 * @id: id of the mode object 378 * @type: type of the mode object 379 * 380 * Note that framebuffers cannot be looked up with this functions - since those 381 * are reference counted, they need special treatment. Even with 382 * DRM_MODE_OBJECT_ANY (although that will simply return NULL 383 * rather than WARN_ON()). 384 */ 385 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, 386 uint32_t id, uint32_t type) 387 { 388 struct drm_mode_object *obj = NULL; 389 390 /* Framebuffers are reference counted and need their own lookup 391 * function.*/ 392 WARN_ON(type == DRM_MODE_OBJECT_FB || type == DRM_MODE_OBJECT_BLOB); 393 obj = _object_find(dev, id, type); 394 return obj; 395 } 396 EXPORT_SYMBOL(drm_mode_object_find); 397 398 /** 399 * drm_framebuffer_init - initialize a framebuffer 400 * @dev: DRM device 401 * @fb: framebuffer to be initialized 402 * @funcs: ... with these functions 403 * 404 * Allocates an ID for the framebuffer's parent mode object, sets its mode 405 * functions & device file and adds it to the master fd list. 406 * 407 * IMPORTANT: 408 * This functions publishes the fb and makes it available for concurrent access 409 * by other users. Which means by this point the fb _must_ be fully set up - 410 * since all the fb attributes are invariant over its lifetime, no further 411 * locking but only correct reference counting is required. 412 * 413 * Returns: 414 * Zero on success, error code on failure. 415 */ 416 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, 417 const struct drm_framebuffer_funcs *funcs) 418 { 419 int ret; 420 421 mutex_lock(&dev->mode_config.fb_lock); 422 kref_init(&fb->refcount); 423 INIT_LIST_HEAD(&fb->filp_head); 424 fb->dev = dev; 425 fb->funcs = funcs; 426 427 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB); 428 if (ret) 429 goto out; 430 431 dev->mode_config.num_fb++; 432 list_add(&fb->head, &dev->mode_config.fb_list); 433 out: 434 mutex_unlock(&dev->mode_config.fb_lock); 435 436 return ret; 437 } 438 EXPORT_SYMBOL(drm_framebuffer_init); 439 440 /* dev->mode_config.fb_lock must be held! */ 441 static void __drm_framebuffer_unregister(struct drm_device *dev, 442 struct drm_framebuffer *fb) 443 { 444 mutex_lock(&dev->mode_config.idr_mutex); 445 idr_remove(&dev->mode_config.crtc_idr, fb->base.id); 446 mutex_unlock(&dev->mode_config.idr_mutex); 447 448 fb->base.id = 0; 449 } 450 451 static void drm_framebuffer_free(struct kref *kref) 452 { 453 struct drm_framebuffer *fb = 454 container_of(kref, struct drm_framebuffer, refcount); 455 struct drm_device *dev = fb->dev; 456 457 /* 458 * The lookup idr holds a weak reference, which has not necessarily been 459 * removed at this point. Check for that. 460 */ 461 mutex_lock(&dev->mode_config.fb_lock); 462 if (fb->base.id) { 463 /* Mark fb as reaped and drop idr ref. */ 464 __drm_framebuffer_unregister(dev, fb); 465 } 466 mutex_unlock(&dev->mode_config.fb_lock); 467 468 fb->funcs->destroy(fb); 469 } 470 471 static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev, 472 uint32_t id) 473 { 474 struct drm_mode_object *obj = NULL; 475 struct drm_framebuffer *fb; 476 477 mutex_lock(&dev->mode_config.idr_mutex); 478 obj = idr_find(&dev->mode_config.crtc_idr, id); 479 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id)) 480 fb = NULL; 481 else 482 fb = obj_to_fb(obj); 483 mutex_unlock(&dev->mode_config.idr_mutex); 484 485 return fb; 486 } 487 488 /** 489 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference 490 * @dev: drm device 491 * @id: id of the fb object 492 * 493 * If successful, this grabs an additional reference to the framebuffer - 494 * callers need to make sure to eventually unreference the returned framebuffer 495 * again, using @drm_framebuffer_unreference. 496 */ 497 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, 498 uint32_t id) 499 { 500 struct drm_framebuffer *fb; 501 502 mutex_lock(&dev->mode_config.fb_lock); 503 fb = __drm_framebuffer_lookup(dev, id); 504 if (fb) { 505 if (!kref_get_unless_zero(&fb->refcount)) 506 fb = NULL; 507 } 508 mutex_unlock(&dev->mode_config.fb_lock); 509 510 return fb; 511 } 512 EXPORT_SYMBOL(drm_framebuffer_lookup); 513 514 /** 515 * drm_framebuffer_unreference - unref a framebuffer 516 * @fb: framebuffer to unref 517 * 518 * This functions decrements the fb's refcount and frees it if it drops to zero. 519 */ 520 void drm_framebuffer_unreference(struct drm_framebuffer *fb) 521 { 522 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, fb->refcount.kr_count); 523 kref_put(&fb->refcount, drm_framebuffer_free); 524 } 525 EXPORT_SYMBOL(drm_framebuffer_unreference); 526 527 /** 528 * drm_framebuffer_reference - incr the fb refcnt 529 * @fb: framebuffer 530 * 531 * This functions increments the fb's refcount. 532 */ 533 void drm_framebuffer_reference(struct drm_framebuffer *fb) 534 { 535 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, fb->refcount.kr_count); 536 kref_get(&fb->refcount); 537 } 538 EXPORT_SYMBOL(drm_framebuffer_reference); 539 540 /** 541 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr 542 * @fb: fb to unregister 543 * 544 * Drivers need to call this when cleaning up driver-private framebuffers, e.g. 545 * those used for fbdev. Note that the caller must hold a reference of it's own, 546 * i.e. the object may not be destroyed through this call (since it'll lead to a 547 * locking inversion). 548 */ 549 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) 550 { 551 struct drm_device *dev; 552 553 if (!fb) 554 return; 555 556 dev = fb->dev; 557 558 mutex_lock(&dev->mode_config.fb_lock); 559 /* Mark fb as reaped and drop idr ref. */ 560 __drm_framebuffer_unregister(dev, fb); 561 mutex_unlock(&dev->mode_config.fb_lock); 562 } 563 EXPORT_SYMBOL(drm_framebuffer_unregister_private); 564 565 /** 566 * drm_framebuffer_cleanup - remove a framebuffer object 567 * @fb: framebuffer to remove 568 * 569 * Cleanup framebuffer. This function is intended to be used from the drivers 570 * ->destroy callback. It can also be used to clean up driver private 571 * framebuffers embedded into a larger structure. 572 * 573 * Note that this function does not remove the fb from active usuage - if it is 574 * still used anywhere, hilarity can ensue since userspace could call getfb on 575 * the id and get back -EINVAL. Obviously no concern at driver unload time. 576 * 577 * Also, the framebuffer will not be removed from the lookup idr - for 578 * user-created framebuffers this will happen in in the rmfb ioctl. For 579 * driver-private objects (e.g. for fbdev) drivers need to explicitly call 580 * drm_framebuffer_unregister_private. 581 */ 582 void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 583 { 584 struct drm_device *dev = fb->dev; 585 586 mutex_lock(&dev->mode_config.fb_lock); 587 list_del(&fb->head); 588 dev->mode_config.num_fb--; 589 mutex_unlock(&dev->mode_config.fb_lock); 590 } 591 EXPORT_SYMBOL(drm_framebuffer_cleanup); 592 593 /** 594 * drm_framebuffer_remove - remove and unreference a framebuffer object 595 * @fb: framebuffer to remove 596 * 597 * Scans all the CRTCs and planes in @dev's mode_config. If they're 598 * using @fb, removes it, setting it to NULL. Then drops the reference to the 599 * passed-in framebuffer. Might take the modeset locks. 600 * 601 * Note that this function optimizes the cleanup away if the caller holds the 602 * last reference to the framebuffer. It is also guaranteed to not take the 603 * modeset locks in this case. 604 */ 605 void drm_framebuffer_remove(struct drm_framebuffer *fb) 606 { 607 struct drm_device *dev; 608 struct drm_crtc *crtc; 609 struct drm_plane *plane; 610 struct drm_mode_set set; 611 int ret; 612 613 if (!fb) 614 return; 615 616 dev = fb->dev; 617 618 WARN_ON(!list_empty(&fb->filp_head)); 619 620 /* 621 * drm ABI mandates that we remove any deleted framebuffers from active 622 * useage. But since most sane clients only remove framebuffers they no 623 * longer need, try to optimize this away. 624 * 625 * Since we're holding a reference ourselves, observing a refcount of 1 626 * means that we're the last holder and can skip it. Also, the refcount 627 * can never increase from 1 again, so we don't need any barriers or 628 * locks. 629 * 630 * Note that userspace could try to race with use and instate a new 631 * usage _after_ we've cleared all current ones. End result will be an 632 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot 633 * in this manner. 634 */ 635 if (!kref_exclusive_p(&fb->refcount)) { 636 drm_modeset_lock_all(dev); 637 /* remove from any CRTC */ 638 drm_for_each_crtc(crtc, dev) { 639 if (crtc->primary->fb == fb) { 640 /* should turn off the crtc */ 641 memset(&set, 0, sizeof(struct drm_mode_set)); 642 set.crtc = crtc; 643 set.fb = NULL; 644 ret = drm_mode_set_config_internal(&set); 645 if (ret) 646 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); 647 } 648 } 649 650 drm_for_each_plane(plane, dev) { 651 if (plane->fb == fb) 652 drm_plane_force_disable(plane); 653 } 654 drm_modeset_unlock_all(dev); 655 } 656 657 drm_framebuffer_unreference(fb); 658 } 659 EXPORT_SYMBOL(drm_framebuffer_remove); 660 661 DEFINE_WW_CLASS(crtc_ww_class); 662 663 /** 664 * drm_crtc_init_with_planes - Initialise a new CRTC object with 665 * specified primary and cursor planes. 666 * @dev: DRM device 667 * @crtc: CRTC object to init 668 * @primary: Primary plane for CRTC 669 * @cursor: Cursor plane for CRTC 670 * @funcs: callbacks for the new CRTC 671 * 672 * Inits a new object created as base part of a driver crtc object. 673 * 674 * Returns: 675 * Zero on success, error code on failure. 676 */ 677 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 678 struct drm_plane *primary, 679 struct drm_plane *cursor, 680 const struct drm_crtc_funcs *funcs) 681 { 682 struct drm_mode_config *config = &dev->mode_config; 683 int ret; 684 685 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); 686 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); 687 688 crtc->dev = dev; 689 crtc->funcs = funcs; 690 691 drm_modeset_lock_init(&crtc->mutex); 692 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 693 if (ret) 694 return ret; 695 696 crtc->base.properties = &crtc->properties; 697 698 list_add_tail(&crtc->head, &config->crtc_list); 699 config->num_crtc++; 700 701 crtc->primary = primary; 702 crtc->cursor = cursor; 703 if (primary) 704 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 705 if (cursor) 706 cursor->possible_crtcs = 1 << drm_crtc_index(crtc); 707 708 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 709 drm_object_attach_property(&crtc->base, config->prop_active, 0); 710 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); 711 } 712 713 return 0; 714 } 715 EXPORT_SYMBOL(drm_crtc_init_with_planes); 716 717 /** 718 * drm_crtc_cleanup - Clean up the core crtc usage 719 * @crtc: CRTC to cleanup 720 * 721 * This function cleans up @crtc and removes it from the DRM mode setting 722 * core. Note that the function does *not* free the crtc structure itself, 723 * this is the responsibility of the caller. 724 */ 725 void drm_crtc_cleanup(struct drm_crtc *crtc) 726 { 727 struct drm_device *dev = crtc->dev; 728 729 kfree(crtc->gamma_store); 730 crtc->gamma_store = NULL; 731 732 drm_modeset_lock_fini(&crtc->mutex); 733 734 drm_mode_object_put(dev, &crtc->base); 735 list_del(&crtc->head); 736 dev->mode_config.num_crtc--; 737 738 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); 739 if (crtc->state && crtc->funcs->atomic_destroy_state) 740 crtc->funcs->atomic_destroy_state(crtc, crtc->state); 741 742 memset(crtc, 0, sizeof(*crtc)); 743 } 744 EXPORT_SYMBOL(drm_crtc_cleanup); 745 746 /** 747 * drm_crtc_index - find the index of a registered CRTC 748 * @crtc: CRTC to find index for 749 * 750 * Given a registered CRTC, return the index of that CRTC within a DRM 751 * device's list of CRTCs. 752 */ 753 unsigned int drm_crtc_index(struct drm_crtc *crtc) 754 { 755 unsigned int index = 0; 756 struct drm_crtc *tmp; 757 758 drm_for_each_crtc(tmp, crtc->dev) { 759 if (tmp == crtc) 760 return index; 761 762 index++; 763 } 764 765 BUG(); 766 } 767 EXPORT_SYMBOL(drm_crtc_index); 768 769 /* 770 * drm_mode_remove - remove and free a mode 771 * @connector: connector list to modify 772 * @mode: mode to remove 773 * 774 * Remove @mode from @connector's mode list, then free it. 775 */ 776 static void drm_mode_remove(struct drm_connector *connector, 777 struct drm_display_mode *mode) 778 { 779 list_del(&mode->head); 780 drm_mode_destroy(connector->dev, mode); 781 } 782 783 /** 784 * drm_display_info_set_bus_formats - set the supported bus formats 785 * @info: display info to store bus formats in 786 * @formats: array containing the supported bus formats 787 * @num_formats: the number of entries in the fmts array 788 * 789 * Store the supported bus formats in display info structure. 790 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for 791 * a full list of available formats. 792 */ 793 int drm_display_info_set_bus_formats(struct drm_display_info *info, 794 const u32 *formats, 795 unsigned int num_formats) 796 { 797 u32 *fmts = NULL; 798 799 if (!formats && num_formats) 800 return -EINVAL; 801 802 if (formats && num_formats) { 803 fmts = kmemdup(formats, sizeof(*formats) * num_formats, 804 GFP_KERNEL); 805 if (!fmts) 806 return -ENOMEM; 807 } 808 809 kfree(info->bus_formats); 810 info->bus_formats = fmts; 811 info->num_bus_formats = num_formats; 812 813 return 0; 814 } 815 EXPORT_SYMBOL(drm_display_info_set_bus_formats); 816 817 /** 818 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 819 * @connector: connector to quwery 820 * 821 * The kernel supports per-connector configration of its consoles through 822 * use of the video= parameter. This function parses that option and 823 * extracts the user's specified mode (or enable/disable status) for a 824 * particular connector. This is typically only used during the early fbdev 825 * setup. 826 */ 827 static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 828 { 829 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 830 char *option = NULL; 831 832 #ifdef __NetBSD__ 833 prop_dictionary_t prop = device_properties(connector->dev->dev); 834 if (!prop_dictionary_get_cstring(prop, connector->name, &option)) 835 return; 836 #else 837 if (fb_get_options(connector->name, &option)) 838 return; 839 #endif 840 841 if (!drm_mode_parse_command_line_for_connector(option, 842 connector, 843 mode)) 844 return; 845 846 if (mode->force) { 847 const char *s; 848 849 switch (mode->force) { 850 case DRM_FORCE_OFF: 851 s = "OFF"; 852 break; 853 case DRM_FORCE_ON_DIGITAL: 854 s = "ON - dig"; 855 break; 856 default: 857 case DRM_FORCE_ON: 858 s = "ON"; 859 break; 860 } 861 862 DRM_INFO("forcing %s connector %s\n", connector->name, s); 863 connector->force = mode->force; 864 } 865 866 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 867 connector->name, 868 mode->xres, mode->yres, 869 mode->refresh_specified ? mode->refresh : 60, 870 mode->rb ? " reduced blanking" : "", 871 mode->margins ? " with margins" : "", 872 mode->interlace ? " interlaced" : ""); 873 } 874 875 /** 876 * drm_connector_init - Init a preallocated connector 877 * @dev: DRM device 878 * @connector: the connector to init 879 * @funcs: callbacks for this connector 880 * @connector_type: user visible type of the connector 881 * 882 * Initialises a preallocated connector. Connectors should be 883 * subclassed as part of driver connector objects. 884 * 885 * Returns: 886 * Zero on success, error code on failure. 887 */ 888 int drm_connector_init(struct drm_device *dev, 889 struct drm_connector *connector, 890 const struct drm_connector_funcs *funcs, 891 int connector_type) 892 { 893 struct drm_mode_config *config = &dev->mode_config; 894 int ret; 895 struct ida *connector_ida = 896 &drm_connector_enum_list[connector_type].ida; 897 898 drm_modeset_lock_all(dev); 899 900 ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false); 901 if (ret) 902 goto out_unlock; 903 904 connector->base.properties = &connector->properties; 905 connector->dev = dev; 906 connector->funcs = funcs; 907 connector->connector_type = connector_type; 908 connector->connector_type_id = 909 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); 910 if (connector->connector_type_id < 0) { 911 ret = connector->connector_type_id; 912 goto out_put; 913 } 914 connector->name = 915 kasprintf(GFP_KERNEL, "%s-%d", 916 drm_connector_enum_list[connector_type].name, 917 connector->connector_type_id); 918 if (!connector->name) { 919 ret = -ENOMEM; 920 goto out_put; 921 } 922 923 INIT_LIST_HEAD(&connector->probed_modes); 924 INIT_LIST_HEAD(&connector->modes); 925 connector->edid_blob_ptr = NULL; 926 connector->status = connector_status_unknown; 927 928 drm_connector_get_cmdline_mode(connector); 929 930 /* We should add connectors at the end to avoid upsetting the connector 931 * index too much. */ 932 list_add_tail(&connector->head, &config->connector_list); 933 config->num_connector++; 934 935 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 936 drm_object_attach_property(&connector->base, 937 config->edid_property, 938 0); 939 940 drm_object_attach_property(&connector->base, 941 config->dpms_property, 0); 942 943 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 944 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); 945 } 946 947 connector->debugfs_entry = NULL; 948 949 out_put: 950 if (ret) 951 drm_mode_object_put(dev, &connector->base); 952 953 out_unlock: 954 drm_modeset_unlock_all(dev); 955 956 return ret; 957 } 958 EXPORT_SYMBOL(drm_connector_init); 959 960 /** 961 * drm_connector_cleanup - cleans up an initialised connector 962 * @connector: connector to cleanup 963 * 964 * Cleans up the connector but doesn't free the object. 965 */ 966 void drm_connector_cleanup(struct drm_connector *connector) 967 { 968 struct drm_device *dev = connector->dev; 969 struct drm_display_mode *mode, *t; 970 971 if (connector->tile_group) { 972 drm_mode_put_tile_group(dev, connector->tile_group); 973 connector->tile_group = NULL; 974 } 975 976 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 977 drm_mode_remove(connector, mode); 978 979 list_for_each_entry_safe(mode, t, &connector->modes, head) 980 drm_mode_remove(connector, mode); 981 982 ida_remove(&drm_connector_enum_list[connector->connector_type].ida, 983 connector->connector_type_id); 984 985 kfree(connector->display_info.bus_formats); 986 drm_mode_object_put(dev, &connector->base); 987 kfree(connector->name); 988 connector->name = NULL; 989 list_del(&connector->head); 990 dev->mode_config.num_connector--; 991 992 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 993 if (connector->state && connector->funcs->atomic_destroy_state) 994 connector->funcs->atomic_destroy_state(connector, 995 connector->state); 996 997 memset(connector, 0, sizeof(*connector)); 998 } 999 EXPORT_SYMBOL(drm_connector_cleanup); 1000 1001 /** 1002 * drm_connector_index - find the index of a registered connector 1003 * @connector: connector to find index for 1004 * 1005 * Given a registered connector, return the index of that connector within a DRM 1006 * device's list of connectors. 1007 */ 1008 unsigned int drm_connector_index(struct drm_connector *connector) 1009 { 1010 unsigned int index = 0; 1011 struct drm_connector *tmp; 1012 struct drm_mode_config *config = &connector->dev->mode_config; 1013 1014 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 1015 1016 drm_for_each_connector(tmp, connector->dev) { 1017 if (tmp == connector) 1018 return index; 1019 1020 index++; 1021 } 1022 1023 BUG(); 1024 } 1025 EXPORT_SYMBOL(drm_connector_index); 1026 1027 /** 1028 * drm_connector_register - register a connector 1029 * @connector: the connector to register 1030 * 1031 * Register userspace interfaces for a connector 1032 * 1033 * Returns: 1034 * Zero on success, error code on failure. 1035 */ 1036 int drm_connector_register(struct drm_connector *connector) 1037 { 1038 int ret; 1039 1040 drm_mode_object_register(connector->dev, &connector->base); 1041 1042 #ifndef __NetBSD__ /* XXX sysfs, debugfs */ 1043 ret = drm_sysfs_connector_add(connector); 1044 if (ret) 1045 return ret; 1046 1047 ret = drm_debugfs_connector_add(connector); 1048 if (ret) { 1049 drm_sysfs_connector_remove(connector); 1050 return ret; 1051 } 1052 #endif 1053 1054 return 0; 1055 } 1056 EXPORT_SYMBOL(drm_connector_register); 1057 1058 /** 1059 * drm_connector_unregister - unregister a connector 1060 * @connector: the connector to unregister 1061 * 1062 * Unregister userspace interfaces for a connector 1063 */ 1064 void drm_connector_unregister(struct drm_connector *connector) 1065 { 1066 #ifndef __NetBSD__ /* XXX sysfs, debugfs */ 1067 drm_sysfs_connector_remove(connector); 1068 drm_debugfs_connector_remove(connector); 1069 #endif 1070 } 1071 EXPORT_SYMBOL(drm_connector_unregister); 1072 1073 1074 /** 1075 * drm_connector_unplug_all - unregister connector userspace interfaces 1076 * @dev: drm device 1077 * 1078 * This function unregisters all connector userspace interfaces in sysfs. Should 1079 * be call when the device is disconnected, e.g. from an usb driver's 1080 * ->disconnect callback. 1081 */ 1082 void drm_connector_unplug_all(struct drm_device *dev) 1083 { 1084 struct drm_connector *connector; 1085 1086 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */ 1087 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1088 drm_connector_unregister(connector); 1089 1090 } 1091 EXPORT_SYMBOL(drm_connector_unplug_all); 1092 1093 /** 1094 * drm_encoder_init - Init a preallocated encoder 1095 * @dev: drm device 1096 * @encoder: the encoder to init 1097 * @funcs: callbacks for this encoder 1098 * @encoder_type: user visible type of the encoder 1099 * 1100 * Initialises a preallocated encoder. Encoder should be 1101 * subclassed as part of driver encoder objects. 1102 * 1103 * Returns: 1104 * Zero on success, error code on failure. 1105 */ 1106 int drm_encoder_init(struct drm_device *dev, 1107 struct drm_encoder *encoder, 1108 const struct drm_encoder_funcs *funcs, 1109 int encoder_type) 1110 { 1111 int ret; 1112 1113 drm_modeset_lock_all(dev); 1114 1115 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1116 if (ret) 1117 goto out_unlock; 1118 1119 encoder->dev = dev; 1120 encoder->encoder_type = encoder_type; 1121 encoder->funcs = funcs; 1122 encoder->name = kasprintf(GFP_KERNEL, "%s-%d", 1123 drm_encoder_enum_list[encoder_type].name, 1124 encoder->base.id); 1125 if (!encoder->name) { 1126 ret = -ENOMEM; 1127 goto out_put; 1128 } 1129 1130 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1131 dev->mode_config.num_encoder++; 1132 1133 out_put: 1134 if (ret) 1135 drm_mode_object_put(dev, &encoder->base); 1136 1137 out_unlock: 1138 drm_modeset_unlock_all(dev); 1139 1140 return ret; 1141 } 1142 EXPORT_SYMBOL(drm_encoder_init); 1143 1144 /** 1145 * drm_encoder_cleanup - cleans up an initialised encoder 1146 * @encoder: encoder to cleanup 1147 * 1148 * Cleans up the encoder but doesn't free the object. 1149 */ 1150 void drm_encoder_cleanup(struct drm_encoder *encoder) 1151 { 1152 struct drm_device *dev = encoder->dev; 1153 1154 drm_modeset_lock_all(dev); 1155 drm_mode_object_put(dev, &encoder->base); 1156 kfree(encoder->name); 1157 list_del(&encoder->head); 1158 dev->mode_config.num_encoder--; 1159 drm_modeset_unlock_all(dev); 1160 1161 memset(encoder, 0, sizeof(*encoder)); 1162 } 1163 EXPORT_SYMBOL(drm_encoder_cleanup); 1164 1165 /** 1166 * drm_universal_plane_init - Initialize a new universal plane object 1167 * @dev: DRM device 1168 * @plane: plane object to init 1169 * @possible_crtcs: bitmask of possible CRTCs 1170 * @funcs: callbacks for the new plane 1171 * @formats: array of supported formats (%DRM_FORMAT_*) 1172 * @format_count: number of elements in @formats 1173 * @type: type of plane (overlay, primary, cursor) 1174 * 1175 * Initializes a plane object of type @type. 1176 * 1177 * Returns: 1178 * Zero on success, error code on failure. 1179 */ 1180 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1181 unsigned long possible_crtcs, 1182 const struct drm_plane_funcs *funcs, 1183 const uint32_t *formats, unsigned int format_count, 1184 enum drm_plane_type type) 1185 { 1186 struct drm_mode_config *config = &dev->mode_config; 1187 int ret; 1188 1189 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1190 if (ret) 1191 return ret; 1192 1193 drm_modeset_lock_init(&plane->mutex); 1194 1195 plane->base.properties = &plane->properties; 1196 plane->dev = dev; 1197 plane->funcs = funcs; 1198 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t), 1199 GFP_KERNEL); 1200 if (!plane->format_types) { 1201 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1202 drm_mode_object_put(dev, &plane->base); 1203 return -ENOMEM; 1204 } 1205 1206 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1207 plane->format_count = format_count; 1208 plane->possible_crtcs = possible_crtcs; 1209 plane->type = type; 1210 1211 list_add_tail(&plane->head, &config->plane_list); 1212 config->num_total_plane++; 1213 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1214 config->num_overlay_plane++; 1215 1216 drm_object_attach_property(&plane->base, 1217 config->plane_type_property, 1218 plane->type); 1219 1220 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 1221 drm_object_attach_property(&plane->base, config->prop_fb_id, 0); 1222 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); 1223 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); 1224 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); 1225 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); 1226 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); 1227 drm_object_attach_property(&plane->base, config->prop_src_x, 0); 1228 drm_object_attach_property(&plane->base, config->prop_src_y, 0); 1229 drm_object_attach_property(&plane->base, config->prop_src_w, 0); 1230 drm_object_attach_property(&plane->base, config->prop_src_h, 0); 1231 } 1232 1233 return 0; 1234 } 1235 EXPORT_SYMBOL(drm_universal_plane_init); 1236 1237 /** 1238 * drm_plane_init - Initialize a legacy plane 1239 * @dev: DRM device 1240 * @plane: plane object to init 1241 * @possible_crtcs: bitmask of possible CRTCs 1242 * @funcs: callbacks for the new plane 1243 * @formats: array of supported formats (%DRM_FORMAT_*) 1244 * @format_count: number of elements in @formats 1245 * @is_primary: plane type (primary vs overlay) 1246 * 1247 * Legacy API to initialize a DRM plane. 1248 * 1249 * New drivers should call drm_universal_plane_init() instead. 1250 * 1251 * Returns: 1252 * Zero on success, error code on failure. 1253 */ 1254 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1255 unsigned long possible_crtcs, 1256 const struct drm_plane_funcs *funcs, 1257 const uint32_t *formats, unsigned int format_count, 1258 bool is_primary) 1259 { 1260 enum drm_plane_type type; 1261 1262 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1263 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1264 formats, format_count, type); 1265 } 1266 EXPORT_SYMBOL(drm_plane_init); 1267 1268 /** 1269 * drm_plane_cleanup - Clean up the core plane usage 1270 * @plane: plane to cleanup 1271 * 1272 * This function cleans up @plane and removes it from the DRM mode setting 1273 * core. Note that the function does *not* free the plane structure itself, 1274 * this is the responsibility of the caller. 1275 */ 1276 void drm_plane_cleanup(struct drm_plane *plane) 1277 { 1278 struct drm_device *dev = plane->dev; 1279 1280 drm_modeset_lock_all(dev); 1281 kfree(plane->format_types); 1282 drm_mode_object_put(dev, &plane->base); 1283 1284 BUG_ON(list_empty(&plane->head)); 1285 1286 list_del(&plane->head); 1287 dev->mode_config.num_total_plane--; 1288 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1289 dev->mode_config.num_overlay_plane--; 1290 drm_modeset_unlock_all(dev); 1291 1292 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1293 if (plane->state && plane->funcs->atomic_destroy_state) 1294 plane->funcs->atomic_destroy_state(plane, plane->state); 1295 1296 memset(plane, 0, sizeof(*plane)); 1297 } 1298 EXPORT_SYMBOL(drm_plane_cleanup); 1299 1300 /** 1301 * drm_plane_index - find the index of a registered plane 1302 * @plane: plane to find index for 1303 * 1304 * Given a registered plane, return the index of that CRTC within a DRM 1305 * device's list of planes. 1306 */ 1307 unsigned int drm_plane_index(struct drm_plane *plane) 1308 { 1309 unsigned int index = 0; 1310 struct drm_plane *tmp; 1311 1312 drm_for_each_plane(tmp, plane->dev) { 1313 if (tmp == plane) 1314 return index; 1315 1316 index++; 1317 } 1318 1319 BUG(); 1320 } 1321 EXPORT_SYMBOL(drm_plane_index); 1322 1323 /** 1324 * drm_plane_from_index - find the registered plane at an index 1325 * @dev: DRM device 1326 * @idx: index of registered plane to find for 1327 * 1328 * Given a plane index, return the registered plane from DRM device's 1329 * list of planes with matching index. 1330 */ 1331 struct drm_plane * 1332 drm_plane_from_index(struct drm_device *dev, int idx) 1333 { 1334 struct drm_plane *plane; 1335 unsigned int i = 0; 1336 1337 drm_for_each_plane(plane, dev) { 1338 if (i == idx) 1339 return plane; 1340 i++; 1341 } 1342 return NULL; 1343 } 1344 EXPORT_SYMBOL(drm_plane_from_index); 1345 1346 /** 1347 * drm_plane_force_disable - Forcibly disable a plane 1348 * @plane: plane to disable 1349 * 1350 * Forces the plane to be disabled. 1351 * 1352 * Used when the plane's current framebuffer is destroyed, 1353 * and when restoring fbdev mode. 1354 */ 1355 void drm_plane_force_disable(struct drm_plane *plane) 1356 { 1357 int ret; 1358 1359 if (!plane->fb) 1360 return; 1361 1362 plane->old_fb = plane->fb; 1363 ret = plane->funcs->disable_plane(plane); 1364 if (ret) { 1365 DRM_ERROR("failed to disable plane with busy fb\n"); 1366 plane->old_fb = NULL; 1367 return; 1368 } 1369 /* disconnect the plane from the fb and crtc: */ 1370 drm_framebuffer_unreference(plane->old_fb); 1371 plane->old_fb = NULL; 1372 plane->fb = NULL; 1373 plane->crtc = NULL; 1374 } 1375 EXPORT_SYMBOL(drm_plane_force_disable); 1376 1377 static int drm_mode_create_standard_properties(struct drm_device *dev) 1378 { 1379 struct drm_property *prop; 1380 1381 /* 1382 * Standard properties (apply to all connectors) 1383 */ 1384 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1385 DRM_MODE_PROP_IMMUTABLE, 1386 "EDID", 0); 1387 if (!prop) 1388 return -ENOMEM; 1389 dev->mode_config.edid_property = prop; 1390 1391 prop = drm_property_create_enum(dev, 0, 1392 "DPMS", drm_dpms_enum_list, 1393 ARRAY_SIZE(drm_dpms_enum_list)); 1394 if (!prop) 1395 return -ENOMEM; 1396 dev->mode_config.dpms_property = prop; 1397 1398 prop = drm_property_create(dev, 1399 DRM_MODE_PROP_BLOB | 1400 DRM_MODE_PROP_IMMUTABLE, 1401 "PATH", 0); 1402 if (!prop) 1403 return -ENOMEM; 1404 dev->mode_config.path_property = prop; 1405 1406 prop = drm_property_create(dev, 1407 DRM_MODE_PROP_BLOB | 1408 DRM_MODE_PROP_IMMUTABLE, 1409 "TILE", 0); 1410 if (!prop) 1411 return -ENOMEM; 1412 dev->mode_config.tile_property = prop; 1413 1414 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1415 "type", drm_plane_type_enum_list, 1416 ARRAY_SIZE(drm_plane_type_enum_list)); 1417 if (!prop) 1418 return -ENOMEM; 1419 dev->mode_config.plane_type_property = prop; 1420 1421 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1422 "SRC_X", 0, UINT_MAX); 1423 if (!prop) 1424 return -ENOMEM; 1425 dev->mode_config.prop_src_x = prop; 1426 1427 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1428 "SRC_Y", 0, UINT_MAX); 1429 if (!prop) 1430 return -ENOMEM; 1431 dev->mode_config.prop_src_y = prop; 1432 1433 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1434 "SRC_W", 0, UINT_MAX); 1435 if (!prop) 1436 return -ENOMEM; 1437 dev->mode_config.prop_src_w = prop; 1438 1439 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1440 "SRC_H", 0, UINT_MAX); 1441 if (!prop) 1442 return -ENOMEM; 1443 dev->mode_config.prop_src_h = prop; 1444 1445 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1446 "CRTC_X", INT_MIN, INT_MAX); 1447 if (!prop) 1448 return -ENOMEM; 1449 dev->mode_config.prop_crtc_x = prop; 1450 1451 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1452 "CRTC_Y", INT_MIN, INT_MAX); 1453 if (!prop) 1454 return -ENOMEM; 1455 dev->mode_config.prop_crtc_y = prop; 1456 1457 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1458 "CRTC_W", 0, INT_MAX); 1459 if (!prop) 1460 return -ENOMEM; 1461 dev->mode_config.prop_crtc_w = prop; 1462 1463 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1464 "CRTC_H", 0, INT_MAX); 1465 if (!prop) 1466 return -ENOMEM; 1467 dev->mode_config.prop_crtc_h = prop; 1468 1469 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1470 "FB_ID", DRM_MODE_OBJECT_FB); 1471 if (!prop) 1472 return -ENOMEM; 1473 dev->mode_config.prop_fb_id = prop; 1474 1475 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1476 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 1477 if (!prop) 1478 return -ENOMEM; 1479 dev->mode_config.prop_crtc_id = prop; 1480 1481 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 1482 "ACTIVE"); 1483 if (!prop) 1484 return -ENOMEM; 1485 dev->mode_config.prop_active = prop; 1486 1487 prop = drm_property_create(dev, 1488 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 1489 "MODE_ID", 0); 1490 if (!prop) 1491 return -ENOMEM; 1492 dev->mode_config.prop_mode_id = prop; 1493 1494 return 0; 1495 } 1496 1497 /** 1498 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1499 * @dev: DRM device 1500 * 1501 * Called by a driver the first time a DVI-I connector is made. 1502 */ 1503 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1504 { 1505 struct drm_property *dvi_i_selector; 1506 struct drm_property *dvi_i_subconnector; 1507 1508 if (dev->mode_config.dvi_i_select_subconnector_property) 1509 return 0; 1510 1511 dvi_i_selector = 1512 drm_property_create_enum(dev, 0, 1513 "select subconnector", 1514 drm_dvi_i_select_enum_list, 1515 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1516 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1517 1518 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1519 "subconnector", 1520 drm_dvi_i_subconnector_enum_list, 1521 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1522 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1523 1524 return 0; 1525 } 1526 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1527 1528 /** 1529 * drm_create_tv_properties - create TV specific connector properties 1530 * @dev: DRM device 1531 * @num_modes: number of different TV formats (modes) supported 1532 * @modes: array of pointers to strings containing name of each format 1533 * 1534 * Called by a driver's TV initialization routine, this function creates 1535 * the TV specific connector properties for a given device. Caller is 1536 * responsible for allocating a list of format names and passing them to 1537 * this routine. 1538 */ 1539 int drm_mode_create_tv_properties(struct drm_device *dev, 1540 unsigned int num_modes, 1541 const char * const modes[]) 1542 { 1543 struct drm_property *tv_selector; 1544 struct drm_property *tv_subconnector; 1545 unsigned int i; 1546 1547 if (dev->mode_config.tv_select_subconnector_property) 1548 return 0; 1549 1550 /* 1551 * Basic connector properties 1552 */ 1553 tv_selector = drm_property_create_enum(dev, 0, 1554 "select subconnector", 1555 drm_tv_select_enum_list, 1556 ARRAY_SIZE(drm_tv_select_enum_list)); 1557 if (!tv_selector) 1558 goto nomem; 1559 1560 dev->mode_config.tv_select_subconnector_property = tv_selector; 1561 1562 tv_subconnector = 1563 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1564 "subconnector", 1565 drm_tv_subconnector_enum_list, 1566 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1567 if (!tv_subconnector) 1568 goto nomem; 1569 dev->mode_config.tv_subconnector_property = tv_subconnector; 1570 1571 /* 1572 * Other, TV specific properties: margins & TV modes. 1573 */ 1574 dev->mode_config.tv_left_margin_property = 1575 drm_property_create_range(dev, 0, "left margin", 0, 100); 1576 if (!dev->mode_config.tv_left_margin_property) 1577 goto nomem; 1578 1579 dev->mode_config.tv_right_margin_property = 1580 drm_property_create_range(dev, 0, "right margin", 0, 100); 1581 if (!dev->mode_config.tv_right_margin_property) 1582 goto nomem; 1583 1584 dev->mode_config.tv_top_margin_property = 1585 drm_property_create_range(dev, 0, "top margin", 0, 100); 1586 if (!dev->mode_config.tv_top_margin_property) 1587 goto nomem; 1588 1589 dev->mode_config.tv_bottom_margin_property = 1590 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1591 if (!dev->mode_config.tv_bottom_margin_property) 1592 goto nomem; 1593 1594 dev->mode_config.tv_mode_property = 1595 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1596 "mode", num_modes); 1597 if (!dev->mode_config.tv_mode_property) 1598 goto nomem; 1599 1600 for (i = 0; i < num_modes; i++) 1601 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1602 i, modes[i]); 1603 1604 dev->mode_config.tv_brightness_property = 1605 drm_property_create_range(dev, 0, "brightness", 0, 100); 1606 if (!dev->mode_config.tv_brightness_property) 1607 goto nomem; 1608 1609 dev->mode_config.tv_contrast_property = 1610 drm_property_create_range(dev, 0, "contrast", 0, 100); 1611 if (!dev->mode_config.tv_contrast_property) 1612 goto nomem; 1613 1614 dev->mode_config.tv_flicker_reduction_property = 1615 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1616 if (!dev->mode_config.tv_flicker_reduction_property) 1617 goto nomem; 1618 1619 dev->mode_config.tv_overscan_property = 1620 drm_property_create_range(dev, 0, "overscan", 0, 100); 1621 if (!dev->mode_config.tv_overscan_property) 1622 goto nomem; 1623 1624 dev->mode_config.tv_saturation_property = 1625 drm_property_create_range(dev, 0, "saturation", 0, 100); 1626 if (!dev->mode_config.tv_saturation_property) 1627 goto nomem; 1628 1629 dev->mode_config.tv_hue_property = 1630 drm_property_create_range(dev, 0, "hue", 0, 100); 1631 if (!dev->mode_config.tv_hue_property) 1632 goto nomem; 1633 1634 return 0; 1635 nomem: 1636 return -ENOMEM; 1637 } 1638 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1639 1640 /** 1641 * drm_mode_create_scaling_mode_property - create scaling mode 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 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1648 { 1649 struct drm_property *scaling_mode; 1650 1651 if (dev->mode_config.scaling_mode_property) 1652 return 0; 1653 1654 scaling_mode = 1655 drm_property_create_enum(dev, 0, "scaling mode", 1656 drm_scaling_mode_enum_list, 1657 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1658 1659 dev->mode_config.scaling_mode_property = scaling_mode; 1660 1661 return 0; 1662 } 1663 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1664 1665 /** 1666 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1667 * @dev: DRM device 1668 * 1669 * Called by a driver the first time it's needed, must be attached to desired 1670 * connectors. 1671 * 1672 * Returns: 1673 * Zero on success, negative errno on failure. 1674 */ 1675 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1676 { 1677 if (dev->mode_config.aspect_ratio_property) 1678 return 0; 1679 1680 dev->mode_config.aspect_ratio_property = 1681 drm_property_create_enum(dev, 0, "aspect ratio", 1682 drm_aspect_ratio_enum_list, 1683 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1684 1685 if (dev->mode_config.aspect_ratio_property == NULL) 1686 return -ENOMEM; 1687 1688 return 0; 1689 } 1690 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1691 1692 /** 1693 * drm_mode_create_dirty_property - create dirty property 1694 * @dev: DRM device 1695 * 1696 * Called by a driver the first time it's needed, must be attached to desired 1697 * connectors. 1698 */ 1699 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1700 { 1701 struct drm_property *dirty_info; 1702 1703 if (dev->mode_config.dirty_info_property) 1704 return 0; 1705 1706 dirty_info = 1707 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1708 "dirty", 1709 drm_dirty_info_enum_list, 1710 ARRAY_SIZE(drm_dirty_info_enum_list)); 1711 dev->mode_config.dirty_info_property = dirty_info; 1712 1713 return 0; 1714 } 1715 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1716 1717 /** 1718 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1719 * @dev: DRM device 1720 * 1721 * Create the the suggested x/y offset property for connectors. 1722 */ 1723 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1724 { 1725 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1726 return 0; 1727 1728 dev->mode_config.suggested_x_property = 1729 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1730 1731 dev->mode_config.suggested_y_property = 1732 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1733 1734 if (dev->mode_config.suggested_x_property == NULL || 1735 dev->mode_config.suggested_y_property == NULL) 1736 return -ENOMEM; 1737 return 0; 1738 } 1739 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1740 1741 /** 1742 * drm_mode_getresources - get graphics configuration 1743 * @dev: drm device for the ioctl 1744 * @data: data pointer for the ioctl 1745 * @file_priv: drm file for the ioctl call 1746 * 1747 * Construct a set of configuration description structures and return 1748 * them to the user, including CRTC, connector and framebuffer configuration. 1749 * 1750 * Called by the user via ioctl. 1751 * 1752 * Returns: 1753 * Zero on success, negative errno on failure. 1754 */ 1755 int drm_mode_getresources(struct drm_device *dev, void *data, 1756 struct drm_file *file_priv) 1757 { 1758 struct drm_mode_card_res *card_res = data; 1759 struct list_head *lh; 1760 struct drm_framebuffer *fb; 1761 struct drm_connector *connector; 1762 struct drm_crtc *crtc; 1763 struct drm_encoder *encoder; 1764 int ret = 0; 1765 int connector_count = 0; 1766 int crtc_count = 0; 1767 int fb_count = 0; 1768 int encoder_count = 0; 1769 int copied = 0; 1770 uint32_t __user *fb_id; 1771 uint32_t __user *crtc_id; 1772 uint32_t __user *connector_id; 1773 uint32_t __user *encoder_id; 1774 1775 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1776 return -EINVAL; 1777 1778 1779 mutex_lock(&file_priv->fbs_lock); 1780 /* 1781 * For the non-control nodes we need to limit the list of resources 1782 * by IDs in the group list for this node 1783 */ 1784 list_for_each(lh, &file_priv->fbs) 1785 fb_count++; 1786 1787 /* handle this in 4 parts */ 1788 /* FBs */ 1789 if (card_res->count_fbs >= fb_count) { 1790 copied = 0; 1791 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1792 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1793 if (put_user(fb->base.id, fb_id + copied)) { 1794 mutex_unlock(&file_priv->fbs_lock); 1795 return -EFAULT; 1796 } 1797 copied++; 1798 } 1799 } 1800 card_res->count_fbs = fb_count; 1801 mutex_unlock(&file_priv->fbs_lock); 1802 1803 /* mode_config.mutex protects the connector list against e.g. DP MST 1804 * connector hot-adding. CRTC/Plane lists are invariant. */ 1805 mutex_lock(&dev->mode_config.mutex); 1806 drm_for_each_crtc(crtc, dev) 1807 crtc_count++; 1808 1809 drm_for_each_connector(connector, dev) 1810 connector_count++; 1811 1812 drm_for_each_encoder(encoder, dev) 1813 encoder_count++; 1814 1815 card_res->max_height = dev->mode_config.max_height; 1816 card_res->min_height = dev->mode_config.min_height; 1817 card_res->max_width = dev->mode_config.max_width; 1818 card_res->min_width = dev->mode_config.min_width; 1819 1820 /* CRTCs */ 1821 if (card_res->count_crtcs >= crtc_count) { 1822 copied = 0; 1823 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1824 drm_for_each_crtc(crtc, dev) { 1825 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 1826 if (put_user(crtc->base.id, crtc_id + copied)) { 1827 ret = -EFAULT; 1828 goto out; 1829 } 1830 copied++; 1831 } 1832 } 1833 card_res->count_crtcs = crtc_count; 1834 1835 /* Encoders */ 1836 if (card_res->count_encoders >= encoder_count) { 1837 copied = 0; 1838 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1839 drm_for_each_encoder(encoder, dev) { 1840 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1841 encoder->name); 1842 if (put_user(encoder->base.id, encoder_id + 1843 copied)) { 1844 ret = -EFAULT; 1845 goto out; 1846 } 1847 copied++; 1848 } 1849 } 1850 card_res->count_encoders = encoder_count; 1851 1852 /* Connectors */ 1853 if (card_res->count_connectors >= connector_count) { 1854 copied = 0; 1855 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1856 drm_for_each_connector(connector, dev) { 1857 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1858 connector->base.id, 1859 connector->name); 1860 if (put_user(connector->base.id, 1861 connector_id + copied)) { 1862 ret = -EFAULT; 1863 goto out; 1864 } 1865 copied++; 1866 } 1867 } 1868 card_res->count_connectors = connector_count; 1869 1870 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1871 card_res->count_connectors, card_res->count_encoders); 1872 1873 out: 1874 mutex_unlock(&dev->mode_config.mutex); 1875 return ret; 1876 } 1877 1878 /** 1879 * drm_mode_getcrtc - get CRTC configuration 1880 * @dev: drm device for the ioctl 1881 * @data: data pointer for the ioctl 1882 * @file_priv: drm file for the ioctl call 1883 * 1884 * Construct a CRTC configuration structure to return to the user. 1885 * 1886 * Called by the user via ioctl. 1887 * 1888 * Returns: 1889 * Zero on success, negative errno on failure. 1890 */ 1891 int drm_mode_getcrtc(struct drm_device *dev, 1892 void *data, struct drm_file *file_priv) 1893 { 1894 struct drm_mode_crtc *crtc_resp = data; 1895 struct drm_crtc *crtc; 1896 1897 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1898 return -EINVAL; 1899 1900 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 1901 if (!crtc) 1902 return -ENOENT; 1903 1904 drm_modeset_lock_crtc(crtc, crtc->primary); 1905 crtc_resp->gamma_size = crtc->gamma_size; 1906 if (crtc->primary->fb) 1907 crtc_resp->fb_id = crtc->primary->fb->base.id; 1908 else 1909 crtc_resp->fb_id = 0; 1910 1911 if (crtc->state) { 1912 crtc_resp->x = crtc->primary->state->src_x >> 16; 1913 crtc_resp->y = crtc->primary->state->src_y >> 16; 1914 if (crtc->state->enable) { 1915 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); 1916 crtc_resp->mode_valid = 1; 1917 1918 } else { 1919 crtc_resp->mode_valid = 0; 1920 } 1921 } else { 1922 crtc_resp->x = crtc->x; 1923 crtc_resp->y = crtc->y; 1924 if (crtc->enabled) { 1925 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); 1926 crtc_resp->mode_valid = 1; 1927 1928 } else { 1929 crtc_resp->mode_valid = 0; 1930 } 1931 } 1932 drm_modeset_unlock_crtc(crtc); 1933 1934 return 0; 1935 } 1936 1937 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 1938 const struct drm_file *file_priv) 1939 { 1940 /* 1941 * If user-space hasn't configured the driver to expose the stereo 3D 1942 * modes, don't expose them. 1943 */ 1944 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 1945 return false; 1946 1947 return true; 1948 } 1949 1950 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 1951 { 1952 /* For atomic drivers only state objects are synchronously updated and 1953 * protected by modeset locks, so check those first. */ 1954 if (connector->state) 1955 return connector->state->best_encoder; 1956 return connector->encoder; 1957 } 1958 1959 /* helper for getconnector and getproperties ioctls */ 1960 static int get_properties(struct drm_mode_object *obj, bool atomic, 1961 uint32_t __user *prop_ptr, uint64_t __user *prop_values, 1962 uint32_t *arg_count_props) 1963 { 1964 int props_count; 1965 int i, ret, copied; 1966 1967 props_count = obj->properties->count; 1968 if (!atomic) 1969 props_count -= obj->properties->atomic_count; 1970 1971 if ((*arg_count_props >= props_count) && props_count) { 1972 for (i = 0, copied = 0; copied < props_count; i++) { 1973 struct drm_property *prop = obj->properties->properties[i]; 1974 uint64_t val; 1975 1976 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) 1977 continue; 1978 1979 ret = drm_object_property_get_value(obj, prop, &val); 1980 if (ret) 1981 return ret; 1982 1983 if (put_user(prop->base.id, prop_ptr + copied)) 1984 return -EFAULT; 1985 1986 if (put_user(val, prop_values + copied)) 1987 return -EFAULT; 1988 1989 copied++; 1990 } 1991 } 1992 *arg_count_props = props_count; 1993 1994 return 0; 1995 } 1996 1997 /** 1998 * drm_mode_getconnector - get connector configuration 1999 * @dev: drm device for the ioctl 2000 * @data: data pointer for the ioctl 2001 * @file_priv: drm file for the ioctl call 2002 * 2003 * Construct a connector configuration structure to return to the user. 2004 * 2005 * Called by the user via ioctl. 2006 * 2007 * Returns: 2008 * Zero on success, negative errno on failure. 2009 */ 2010 int drm_mode_getconnector(struct drm_device *dev, void *data, 2011 struct drm_file *file_priv) 2012 { 2013 struct drm_mode_get_connector *out_resp = data; 2014 struct drm_connector *connector; 2015 struct drm_encoder *encoder; 2016 struct drm_display_mode *mode; 2017 int mode_count = 0; 2018 int encoders_count = 0; 2019 int ret = 0; 2020 int copied = 0; 2021 int i; 2022 struct drm_mode_modeinfo u_mode; 2023 struct drm_mode_modeinfo __user *mode_ptr; 2024 uint32_t __user *encoder_ptr; 2025 2026 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2027 return -EINVAL; 2028 2029 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2030 2031 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 2032 2033 mutex_lock(&dev->mode_config.mutex); 2034 2035 connector = drm_connector_find(dev, out_resp->connector_id); 2036 if (!connector) { 2037 ret = -ENOENT; 2038 goto out_unlock; 2039 } 2040 2041 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) 2042 if (connector->encoder_ids[i] != 0) 2043 encoders_count++; 2044 2045 if (out_resp->count_modes == 0) { 2046 connector->funcs->fill_modes(connector, 2047 dev->mode_config.max_width, 2048 dev->mode_config.max_height); 2049 } 2050 2051 /* delayed so we get modes regardless of pre-fill_modes state */ 2052 list_for_each_entry(mode, &connector->modes, head) 2053 if (drm_mode_expose_to_userspace(mode, file_priv)) 2054 mode_count++; 2055 2056 out_resp->connector_id = connector->base.id; 2057 out_resp->connector_type = connector->connector_type; 2058 out_resp->connector_type_id = connector->connector_type_id; 2059 out_resp->mm_width = connector->display_info.width_mm; 2060 out_resp->mm_height = connector->display_info.height_mm; 2061 out_resp->subpixel = connector->display_info.subpixel_order; 2062 out_resp->connection = connector->status; 2063 2064 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2065 encoder = drm_connector_get_encoder(connector); 2066 if (encoder) 2067 out_resp->encoder_id = encoder->base.id; 2068 else 2069 out_resp->encoder_id = 0; 2070 2071 /* 2072 * This ioctl is called twice, once to determine how much space is 2073 * needed, and the 2nd time to fill it. 2074 */ 2075 if ((out_resp->count_modes >= mode_count) && mode_count) { 2076 copied = 0; 2077 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2078 list_for_each_entry(mode, &connector->modes, head) { 2079 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2080 continue; 2081 2082 drm_mode_convert_to_umode(&u_mode, mode); 2083 if (copy_to_user(mode_ptr + copied, 2084 &u_mode, sizeof(u_mode))) { 2085 ret = -EFAULT; 2086 goto out; 2087 } 2088 copied++; 2089 } 2090 } 2091 out_resp->count_modes = mode_count; 2092 2093 ret = get_properties(&connector->base, file_priv->atomic, 2094 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2095 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2096 &out_resp->count_props); 2097 if (ret) 2098 goto out; 2099 2100 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2101 copied = 0; 2102 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2103 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2104 if (connector->encoder_ids[i] != 0) { 2105 if (put_user(connector->encoder_ids[i], 2106 encoder_ptr + copied)) { 2107 ret = -EFAULT; 2108 goto out; 2109 } 2110 copied++; 2111 } 2112 } 2113 } 2114 out_resp->count_encoders = encoders_count; 2115 2116 out: 2117 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2118 2119 out_unlock: 2120 mutex_unlock(&dev->mode_config.mutex); 2121 2122 return ret; 2123 } 2124 2125 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2126 { 2127 struct drm_connector *connector; 2128 struct drm_device *dev = encoder->dev; 2129 bool uses_atomic = false; 2130 2131 /* For atomic drivers only state objects are synchronously updated and 2132 * protected by modeset locks, so check those first. */ 2133 drm_for_each_connector(connector, dev) { 2134 if (!connector->state) 2135 continue; 2136 2137 uses_atomic = true; 2138 2139 if (connector->state->best_encoder != encoder) 2140 continue; 2141 2142 return connector->state->crtc; 2143 } 2144 2145 /* Don't return stale data (e.g. pending async disable). */ 2146 if (uses_atomic) 2147 return NULL; 2148 2149 return encoder->crtc; 2150 } 2151 2152 /** 2153 * drm_mode_getencoder - get encoder configuration 2154 * @dev: drm device for the ioctl 2155 * @data: data pointer for the ioctl 2156 * @file_priv: drm file for the ioctl call 2157 * 2158 * Construct a encoder configuration structure to return to the user. 2159 * 2160 * Called by the user via ioctl. 2161 * 2162 * Returns: 2163 * Zero on success, negative errno on failure. 2164 */ 2165 int drm_mode_getencoder(struct drm_device *dev, void *data, 2166 struct drm_file *file_priv) 2167 { 2168 struct drm_mode_get_encoder *enc_resp = data; 2169 struct drm_encoder *encoder; 2170 struct drm_crtc *crtc; 2171 2172 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2173 return -EINVAL; 2174 2175 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2176 if (!encoder) 2177 return -ENOENT; 2178 2179 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2180 crtc = drm_encoder_get_crtc(encoder); 2181 if (crtc) 2182 enc_resp->crtc_id = crtc->base.id; 2183 else 2184 enc_resp->crtc_id = 0; 2185 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2186 2187 enc_resp->encoder_type = encoder->encoder_type; 2188 enc_resp->encoder_id = encoder->base.id; 2189 enc_resp->possible_crtcs = encoder->possible_crtcs; 2190 enc_resp->possible_clones = encoder->possible_clones; 2191 2192 return 0; 2193 } 2194 2195 /** 2196 * drm_mode_getplane_res - enumerate all plane resources 2197 * @dev: DRM device 2198 * @data: ioctl data 2199 * @file_priv: DRM file info 2200 * 2201 * Construct a list of plane ids to return to the user. 2202 * 2203 * Called by the user via ioctl. 2204 * 2205 * Returns: 2206 * Zero on success, negative errno on failure. 2207 */ 2208 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2209 struct drm_file *file_priv) 2210 { 2211 struct drm_mode_get_plane_res *plane_resp = data; 2212 struct drm_mode_config *config; 2213 struct drm_plane *plane; 2214 uint32_t __user *plane_ptr; 2215 int copied = 0; 2216 unsigned num_planes; 2217 2218 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2219 return -EINVAL; 2220 2221 config = &dev->mode_config; 2222 2223 if (file_priv->universal_planes) 2224 num_planes = config->num_total_plane; 2225 else 2226 num_planes = config->num_overlay_plane; 2227 2228 /* 2229 * This ioctl is called twice, once to determine how much space is 2230 * needed, and the 2nd time to fill it. 2231 */ 2232 if (num_planes && 2233 (plane_resp->count_planes >= num_planes)) { 2234 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2235 2236 /* Plane lists are invariant, no locking needed. */ 2237 drm_for_each_plane(plane, dev) { 2238 /* 2239 * Unless userspace set the 'universal planes' 2240 * capability bit, only advertise overlays. 2241 */ 2242 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2243 !file_priv->universal_planes) 2244 continue; 2245 2246 if (put_user(plane->base.id, plane_ptr + copied)) 2247 return -EFAULT; 2248 copied++; 2249 } 2250 } 2251 plane_resp->count_planes = num_planes; 2252 2253 return 0; 2254 } 2255 2256 /** 2257 * drm_mode_getplane - get plane configuration 2258 * @dev: DRM device 2259 * @data: ioctl data 2260 * @file_priv: DRM file info 2261 * 2262 * Construct a plane configuration structure to return to the user. 2263 * 2264 * Called by the user via ioctl. 2265 * 2266 * Returns: 2267 * Zero on success, negative errno on failure. 2268 */ 2269 int drm_mode_getplane(struct drm_device *dev, void *data, 2270 struct drm_file *file_priv) 2271 { 2272 struct drm_mode_get_plane *plane_resp = data; 2273 struct drm_plane *plane; 2274 uint32_t __user *format_ptr; 2275 2276 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2277 return -EINVAL; 2278 2279 plane = drm_plane_find(dev, plane_resp->plane_id); 2280 if (!plane) 2281 return -ENOENT; 2282 2283 drm_modeset_lock(&plane->mutex, NULL); 2284 if (plane->crtc) 2285 plane_resp->crtc_id = plane->crtc->base.id; 2286 else 2287 plane_resp->crtc_id = 0; 2288 2289 if (plane->fb) 2290 plane_resp->fb_id = plane->fb->base.id; 2291 else 2292 plane_resp->fb_id = 0; 2293 drm_modeset_unlock(&plane->mutex); 2294 2295 plane_resp->plane_id = plane->base.id; 2296 plane_resp->possible_crtcs = plane->possible_crtcs; 2297 plane_resp->gamma_size = 0; 2298 2299 /* 2300 * This ioctl is called twice, once to determine how much space is 2301 * needed, and the 2nd time to fill it. 2302 */ 2303 if (plane->format_count && 2304 (plane_resp->count_format_types >= plane->format_count)) { 2305 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2306 if (copy_to_user(format_ptr, 2307 plane->format_types, 2308 sizeof(uint32_t) * plane->format_count)) { 2309 return -EFAULT; 2310 } 2311 } 2312 plane_resp->count_format_types = plane->format_count; 2313 2314 return 0; 2315 } 2316 2317 /** 2318 * drm_plane_check_pixel_format - Check if the plane supports the pixel format 2319 * @plane: plane to check for format support 2320 * @format: the pixel format 2321 * 2322 * Returns: 2323 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL 2324 * otherwise. 2325 */ 2326 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format) 2327 { 2328 unsigned int i; 2329 2330 for (i = 0; i < plane->format_count; i++) { 2331 if (format == plane->format_types[i]) 2332 return 0; 2333 } 2334 2335 return -EINVAL; 2336 } 2337 2338 static int check_src_coords(uint32_t src_x, uint32_t src_y, 2339 uint32_t src_w, uint32_t src_h, 2340 const struct drm_framebuffer *fb) 2341 { 2342 unsigned int fb_width, fb_height; 2343 2344 fb_width = fb->width << 16; 2345 fb_height = fb->height << 16; 2346 2347 /* Make sure source coordinates are inside the fb. */ 2348 if (src_w > fb_width || 2349 src_x > fb_width - src_w || 2350 src_h > fb_height || 2351 src_y > fb_height - src_h) { 2352 DRM_DEBUG_KMS("Invalid source coordinates " 2353 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2354 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2355 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2356 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2357 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2358 return -ENOSPC; 2359 } 2360 2361 return 0; 2362 } 2363 2364 /* 2365 * setplane_internal - setplane handler for internal callers 2366 * 2367 * Note that we assume an extra reference has already been taken on fb. If the 2368 * update fails, this reference will be dropped before return; if it succeeds, 2369 * the previous framebuffer (if any) will be unreferenced instead. 2370 * 2371 * src_{x,y,w,h} are provided in 16.16 fixed point format 2372 */ 2373 static int __setplane_internal(struct drm_plane *plane, 2374 struct drm_crtc *crtc, 2375 struct drm_framebuffer *fb, 2376 int32_t crtc_x, int32_t crtc_y, 2377 uint32_t crtc_w, uint32_t crtc_h, 2378 /* src_{x,y,w,h} values are 16.16 fixed point */ 2379 uint32_t src_x, uint32_t src_y, 2380 uint32_t src_w, uint32_t src_h) 2381 { 2382 int ret = 0; 2383 2384 /* No fb means shut it down */ 2385 if (!fb) { 2386 plane->old_fb = plane->fb; 2387 ret = plane->funcs->disable_plane(plane); 2388 if (!ret) { 2389 plane->crtc = NULL; 2390 plane->fb = NULL; 2391 } else { 2392 plane->old_fb = NULL; 2393 } 2394 goto out; 2395 } 2396 2397 /* Check whether this plane is usable on this CRTC */ 2398 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2399 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2400 ret = -EINVAL; 2401 goto out; 2402 } 2403 2404 /* Check whether this plane supports the fb pixel format. */ 2405 ret = drm_plane_check_pixel_format(plane, fb->pixel_format); 2406 if (ret) { 2407 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2408 drm_get_format_name(fb->pixel_format)); 2409 goto out; 2410 } 2411 2412 /* Give drivers some help against integer overflows */ 2413 if (crtc_w > INT_MAX || 2414 crtc_x > INT_MAX - (int32_t) crtc_w || 2415 crtc_h > INT_MAX || 2416 crtc_y > INT_MAX - (int32_t) crtc_h) { 2417 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2418 crtc_w, crtc_h, crtc_x, crtc_y); 2419 ret = -ERANGE; 2420 goto out; 2421 } 2422 2423 ret = check_src_coords(src_x, src_y, src_w, src_h, fb); 2424 if (ret) 2425 goto out; 2426 2427 plane->old_fb = plane->fb; 2428 ret = plane->funcs->update_plane(plane, crtc, fb, 2429 crtc_x, crtc_y, crtc_w, crtc_h, 2430 src_x, src_y, src_w, src_h); 2431 if (!ret) { 2432 plane->crtc = crtc; 2433 plane->fb = fb; 2434 fb = NULL; 2435 } else { 2436 plane->old_fb = NULL; 2437 } 2438 2439 out: 2440 if (fb) 2441 drm_framebuffer_unreference(fb); 2442 if (plane->old_fb) 2443 drm_framebuffer_unreference(plane->old_fb); 2444 plane->old_fb = NULL; 2445 2446 return ret; 2447 } 2448 2449 static int setplane_internal(struct drm_plane *plane, 2450 struct drm_crtc *crtc, 2451 struct drm_framebuffer *fb, 2452 int32_t crtc_x, int32_t crtc_y, 2453 uint32_t crtc_w, uint32_t crtc_h, 2454 /* src_{x,y,w,h} values are 16.16 fixed point */ 2455 uint32_t src_x, uint32_t src_y, 2456 uint32_t src_w, uint32_t src_h) 2457 { 2458 int ret; 2459 2460 drm_modeset_lock_all(plane->dev); 2461 ret = __setplane_internal(plane, crtc, fb, 2462 crtc_x, crtc_y, crtc_w, crtc_h, 2463 src_x, src_y, src_w, src_h); 2464 drm_modeset_unlock_all(plane->dev); 2465 2466 return ret; 2467 } 2468 2469 /** 2470 * drm_mode_setplane - configure a plane's configuration 2471 * @dev: DRM device 2472 * @data: ioctl data* 2473 * @file_priv: DRM file info 2474 * 2475 * Set plane configuration, including placement, fb, scaling, and other factors. 2476 * Or pass a NULL fb to disable (planes may be disabled without providing a 2477 * valid crtc). 2478 * 2479 * Returns: 2480 * Zero on success, negative errno on failure. 2481 */ 2482 int drm_mode_setplane(struct drm_device *dev, void *data, 2483 struct drm_file *file_priv) 2484 { 2485 struct drm_mode_set_plane *plane_req = data; 2486 struct drm_plane *plane; 2487 struct drm_crtc *crtc = NULL; 2488 struct drm_framebuffer *fb = NULL; 2489 2490 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2491 return -EINVAL; 2492 2493 /* 2494 * First, find the plane, crtc, and fb objects. If not available, 2495 * we don't bother to call the driver. 2496 */ 2497 plane = drm_plane_find(dev, plane_req->plane_id); 2498 if (!plane) { 2499 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2500 plane_req->plane_id); 2501 return -ENOENT; 2502 } 2503 2504 if (plane_req->fb_id) { 2505 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2506 if (!fb) { 2507 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2508 plane_req->fb_id); 2509 return -ENOENT; 2510 } 2511 2512 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2513 if (!crtc) { 2514 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2515 plane_req->crtc_id); 2516 return -ENOENT; 2517 } 2518 } 2519 2520 /* 2521 * setplane_internal will take care of deref'ing either the old or new 2522 * framebuffer depending on success. 2523 */ 2524 return setplane_internal(plane, crtc, fb, 2525 plane_req->crtc_x, plane_req->crtc_y, 2526 plane_req->crtc_w, plane_req->crtc_h, 2527 plane_req->src_x, plane_req->src_y, 2528 plane_req->src_w, plane_req->src_h); 2529 } 2530 2531 /** 2532 * drm_mode_set_config_internal - helper to call ->set_config 2533 * @set: modeset config to set 2534 * 2535 * This is a little helper to wrap internal calls to the ->set_config driver 2536 * interface. The only thing it adds is correct refcounting dance. 2537 * 2538 * Returns: 2539 * Zero on success, negative errno on failure. 2540 */ 2541 int drm_mode_set_config_internal(struct drm_mode_set *set) 2542 { 2543 struct drm_crtc *crtc = set->crtc; 2544 struct drm_framebuffer *fb; 2545 struct drm_crtc *tmp; 2546 int ret; 2547 2548 /* 2549 * NOTE: ->set_config can also disable other crtcs (if we steal all 2550 * connectors from it), hence we need to refcount the fbs across all 2551 * crtcs. Atomic modeset will have saner semantics ... 2552 */ 2553 drm_for_each_crtc(tmp, crtc->dev) 2554 tmp->primary->old_fb = tmp->primary->fb; 2555 2556 fb = set->fb; 2557 2558 ret = crtc->funcs->set_config(set); 2559 if (ret == 0) { 2560 crtc->primary->crtc = crtc; 2561 crtc->primary->fb = fb; 2562 } 2563 2564 drm_for_each_crtc(tmp, crtc->dev) { 2565 if (tmp->primary->fb) 2566 drm_framebuffer_reference(tmp->primary->fb); 2567 if (tmp->primary->old_fb) 2568 drm_framebuffer_unreference(tmp->primary->old_fb); 2569 tmp->primary->old_fb = NULL; 2570 } 2571 2572 return ret; 2573 } 2574 EXPORT_SYMBOL(drm_mode_set_config_internal); 2575 2576 /** 2577 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode 2578 * @mode: mode to query 2579 * @hdisplay: hdisplay value to fill in 2580 * @vdisplay: vdisplay value to fill in 2581 * 2582 * The vdisplay value will be doubled if the specified mode is a stereo mode of 2583 * the appropriate layout. 2584 */ 2585 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, 2586 int *hdisplay, int *vdisplay) 2587 { 2588 struct drm_display_mode adjusted; 2589 2590 drm_mode_copy(&adjusted, mode); 2591 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 2592 *hdisplay = adjusted.crtc_hdisplay; 2593 *vdisplay = adjusted.crtc_vdisplay; 2594 } 2595 EXPORT_SYMBOL(drm_crtc_get_hv_timing); 2596 2597 /** 2598 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2599 * CRTC viewport 2600 * @crtc: CRTC that framebuffer will be displayed on 2601 * @x: x panning 2602 * @y: y panning 2603 * @mode: mode that framebuffer will be displayed under 2604 * @fb: framebuffer to check size of 2605 */ 2606 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2607 int x, int y, 2608 const struct drm_display_mode *mode, 2609 const struct drm_framebuffer *fb) 2610 2611 { 2612 int hdisplay, vdisplay; 2613 2614 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); 2615 2616 if (crtc->state && 2617 crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) | 2618 BIT(DRM_ROTATE_270))) 2619 swap(hdisplay, vdisplay); 2620 2621 return check_src_coords(x << 16, y << 16, 2622 hdisplay << 16, vdisplay << 16, fb); 2623 } 2624 EXPORT_SYMBOL(drm_crtc_check_viewport); 2625 2626 /** 2627 * drm_mode_setcrtc - set CRTC configuration 2628 * @dev: drm device for the ioctl 2629 * @data: data pointer for the ioctl 2630 * @file_priv: drm file for the ioctl call 2631 * 2632 * Build a new CRTC configuration based on user request. 2633 * 2634 * Called by the user via ioctl. 2635 * 2636 * Returns: 2637 * Zero on success, negative errno on failure. 2638 */ 2639 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2640 struct drm_file *file_priv) 2641 { 2642 struct drm_mode_config *config = &dev->mode_config; 2643 struct drm_mode_crtc *crtc_req = data; 2644 struct drm_crtc *crtc; 2645 struct drm_connector **connector_set = NULL, *connector; 2646 struct drm_framebuffer *fb = NULL; 2647 struct drm_display_mode *mode = NULL; 2648 struct drm_mode_set set; 2649 uint32_t __user *set_connectors_ptr; 2650 int ret; 2651 int i; 2652 2653 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2654 return -EINVAL; 2655 2656 /* 2657 * Universal plane src offsets are only 16.16, prevent havoc for 2658 * drivers using universal plane code internally. 2659 */ 2660 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) 2661 return -ERANGE; 2662 2663 drm_modeset_lock_all(dev); 2664 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2665 if (!crtc) { 2666 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2667 ret = -ENOENT; 2668 goto out; 2669 } 2670 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 2671 2672 if (crtc_req->mode_valid) { 2673 /* If we have a mode we need a framebuffer. */ 2674 /* If we pass -1, set the mode with the currently bound fb */ 2675 if (crtc_req->fb_id == -1) { 2676 if (!crtc->primary->fb) { 2677 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2678 ret = -EINVAL; 2679 goto out; 2680 } 2681 fb = crtc->primary->fb; 2682 /* Make refcounting symmetric with the lookup path. */ 2683 drm_framebuffer_reference(fb); 2684 } else { 2685 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2686 if (!fb) { 2687 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2688 crtc_req->fb_id); 2689 ret = -ENOENT; 2690 goto out; 2691 } 2692 } 2693 2694 mode = drm_mode_create(dev); 2695 if (!mode) { 2696 ret = -ENOMEM; 2697 goto out; 2698 } 2699 2700 ret = drm_mode_convert_umode(mode, &crtc_req->mode); 2701 if (ret) { 2702 DRM_DEBUG_KMS("Invalid mode\n"); 2703 goto out; 2704 } 2705 2706 /* 2707 * Check whether the primary plane supports the fb pixel format. 2708 * Drivers not implementing the universal planes API use a 2709 * default formats list provided by the DRM core which doesn't 2710 * match real hardware capabilities. Skip the check in that 2711 * case. 2712 */ 2713 if (!crtc->primary->format_default) { 2714 ret = drm_plane_check_pixel_format(crtc->primary, 2715 fb->pixel_format); 2716 if (ret) { 2717 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2718 drm_get_format_name(fb->pixel_format)); 2719 goto out; 2720 } 2721 } 2722 2723 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2724 mode, fb); 2725 if (ret) 2726 goto out; 2727 2728 } 2729 2730 if (crtc_req->count_connectors == 0 && mode) { 2731 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2732 ret = -EINVAL; 2733 goto out; 2734 } 2735 2736 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2737 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2738 crtc_req->count_connectors); 2739 ret = -EINVAL; 2740 goto out; 2741 } 2742 2743 if (crtc_req->count_connectors > 0) { 2744 u32 out_id; 2745 2746 /* Avoid unbounded kernel memory allocation */ 2747 if (crtc_req->count_connectors > config->num_connector) { 2748 ret = -EINVAL; 2749 goto out; 2750 } 2751 2752 connector_set = kmalloc_array(crtc_req->count_connectors, 2753 sizeof(struct drm_connector *), 2754 GFP_KERNEL); 2755 if (!connector_set) { 2756 ret = -ENOMEM; 2757 goto out; 2758 } 2759 2760 for (i = 0; i < crtc_req->count_connectors; i++) { 2761 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2762 if (get_user(out_id, &set_connectors_ptr[i])) { 2763 ret = -EFAULT; 2764 goto out; 2765 } 2766 2767 connector = drm_connector_find(dev, out_id); 2768 if (!connector) { 2769 DRM_DEBUG_KMS("Connector id %d unknown\n", 2770 out_id); 2771 ret = -ENOENT; 2772 goto out; 2773 } 2774 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2775 connector->base.id, 2776 connector->name); 2777 2778 connector_set[i] = connector; 2779 } 2780 } 2781 2782 set.crtc = crtc; 2783 set.x = crtc_req->x; 2784 set.y = crtc_req->y; 2785 set.mode = mode; 2786 set.connectors = connector_set; 2787 set.num_connectors = crtc_req->count_connectors; 2788 set.fb = fb; 2789 ret = drm_mode_set_config_internal(&set); 2790 2791 out: 2792 if (fb) 2793 drm_framebuffer_unreference(fb); 2794 2795 kfree(connector_set); 2796 drm_mode_destroy(dev, mode); 2797 drm_modeset_unlock_all(dev); 2798 return ret; 2799 } 2800 2801 /** 2802 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2803 * universal plane handler call 2804 * @crtc: crtc to update cursor for 2805 * @req: data pointer for the ioctl 2806 * @file_priv: drm file for the ioctl call 2807 * 2808 * Legacy cursor ioctl's work directly with driver buffer handles. To 2809 * translate legacy ioctl calls into universal plane handler calls, we need to 2810 * wrap the native buffer handle in a drm_framebuffer. 2811 * 2812 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2813 * buffer with a pitch of 4*width; the universal plane interface should be used 2814 * directly in cases where the hardware can support other buffer settings and 2815 * userspace wants to make use of these capabilities. 2816 * 2817 * Returns: 2818 * Zero on success, negative errno on failure. 2819 */ 2820 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2821 struct drm_mode_cursor2 *req, 2822 struct drm_file *file_priv) 2823 { 2824 struct drm_device *dev = crtc->dev; 2825 struct drm_framebuffer *fb = NULL; 2826 struct drm_mode_fb_cmd2 fbreq = { 2827 .width = req->width, 2828 .height = req->height, 2829 .pixel_format = DRM_FORMAT_ARGB8888, 2830 .pitches = { req->width * 4 }, 2831 .handles = { req->handle }, 2832 }; 2833 int32_t crtc_x, crtc_y; 2834 uint32_t crtc_w = 0, crtc_h = 0; 2835 uint32_t src_w = 0, src_h = 0; 2836 int ret = 0; 2837 2838 BUG_ON(!crtc->cursor); 2839 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2840 2841 /* 2842 * Obtain fb we'll be using (either new or existing) and take an extra 2843 * reference to it if fb != null. setplane will take care of dropping 2844 * the reference if the plane update fails. 2845 */ 2846 if (req->flags & DRM_MODE_CURSOR_BO) { 2847 if (req->handle) { 2848 fb = internal_framebuffer_create(dev, &fbreq, file_priv); 2849 if (IS_ERR(fb)) { 2850 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2851 return PTR_ERR(fb); 2852 } 2853 } else { 2854 fb = NULL; 2855 } 2856 } else { 2857 fb = crtc->cursor->fb; 2858 if (fb) 2859 drm_framebuffer_reference(fb); 2860 } 2861 2862 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2863 crtc_x = req->x; 2864 crtc_y = req->y; 2865 } else { 2866 crtc_x = crtc->cursor_x; 2867 crtc_y = crtc->cursor_y; 2868 } 2869 2870 if (fb) { 2871 crtc_w = fb->width; 2872 crtc_h = fb->height; 2873 src_w = fb->width << 16; 2874 src_h = fb->height << 16; 2875 } 2876 2877 /* 2878 * setplane_internal will take care of deref'ing either the old or new 2879 * framebuffer depending on success. 2880 */ 2881 ret = __setplane_internal(crtc->cursor, crtc, fb, 2882 crtc_x, crtc_y, crtc_w, crtc_h, 2883 0, 0, src_w, src_h); 2884 2885 /* Update successful; save new cursor position, if necessary */ 2886 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2887 crtc->cursor_x = req->x; 2888 crtc->cursor_y = req->y; 2889 } 2890 2891 return ret; 2892 } 2893 2894 static int drm_mode_cursor_common(struct drm_device *dev, 2895 struct drm_mode_cursor2 *req, 2896 struct drm_file *file_priv) 2897 { 2898 struct drm_crtc *crtc; 2899 int ret = 0; 2900 2901 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2902 return -EINVAL; 2903 2904 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 2905 return -EINVAL; 2906 2907 crtc = drm_crtc_find(dev, req->crtc_id); 2908 if (!crtc) { 2909 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 2910 return -ENOENT; 2911 } 2912 2913 /* 2914 * If this crtc has a universal cursor plane, call that plane's update 2915 * handler rather than using legacy cursor handlers. 2916 */ 2917 drm_modeset_lock_crtc(crtc, crtc->cursor); 2918 if (crtc->cursor) { 2919 ret = drm_mode_cursor_universal(crtc, req, file_priv); 2920 goto out; 2921 } 2922 2923 if (req->flags & DRM_MODE_CURSOR_BO) { 2924 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 2925 ret = -ENXIO; 2926 goto out; 2927 } 2928 /* Turns off the cursor if handle is 0 */ 2929 if (crtc->funcs->cursor_set2) 2930 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 2931 req->width, req->height, req->hot_x, req->hot_y); 2932 else 2933 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 2934 req->width, req->height); 2935 } 2936 2937 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2938 if (crtc->funcs->cursor_move) { 2939 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 2940 } else { 2941 ret = -EFAULT; 2942 goto out; 2943 } 2944 } 2945 out: 2946 drm_modeset_unlock_crtc(crtc); 2947 2948 return ret; 2949 2950 } 2951 2952 2953 /** 2954 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 2955 * @dev: drm device for the ioctl 2956 * @data: data pointer for the ioctl 2957 * @file_priv: drm file for the ioctl call 2958 * 2959 * Set the cursor configuration based on user request. 2960 * 2961 * Called by the user via ioctl. 2962 * 2963 * Returns: 2964 * Zero on success, negative errno on failure. 2965 */ 2966 int drm_mode_cursor_ioctl(struct drm_device *dev, 2967 void *data, struct drm_file *file_priv) 2968 { 2969 struct drm_mode_cursor *req = data; 2970 struct drm_mode_cursor2 new_req; 2971 2972 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 2973 new_req.hot_x = new_req.hot_y = 0; 2974 2975 return drm_mode_cursor_common(dev, &new_req, file_priv); 2976 } 2977 2978 /** 2979 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 2980 * @dev: drm device for the ioctl 2981 * @data: data pointer for the ioctl 2982 * @file_priv: drm file for the ioctl call 2983 * 2984 * Set the cursor configuration based on user request. This implements the 2nd 2985 * version of the cursor ioctl, which allows userspace to additionally specify 2986 * the hotspot of the pointer. 2987 * 2988 * Called by the user via ioctl. 2989 * 2990 * Returns: 2991 * Zero on success, negative errno on failure. 2992 */ 2993 int drm_mode_cursor2_ioctl(struct drm_device *dev, 2994 void *data, struct drm_file *file_priv) 2995 { 2996 struct drm_mode_cursor2 *req = data; 2997 2998 return drm_mode_cursor_common(dev, req, file_priv); 2999 } 3000 3001 /** 3002 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 3003 * @bpp: bits per pixels 3004 * @depth: bit depth per pixel 3005 * 3006 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 3007 * Useful in fbdev emulation code, since that deals in those values. 3008 */ 3009 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 3010 { 3011 uint32_t fmt; 3012 3013 switch (bpp) { 3014 case 8: 3015 fmt = DRM_FORMAT_C8; 3016 break; 3017 case 16: 3018 if (depth == 15) 3019 fmt = DRM_FORMAT_XRGB1555; 3020 else 3021 fmt = DRM_FORMAT_RGB565; 3022 break; 3023 case 24: 3024 fmt = DRM_FORMAT_RGB888; 3025 break; 3026 case 32: 3027 if (depth == 24) 3028 fmt = DRM_FORMAT_XRGB8888; 3029 else if (depth == 30) 3030 fmt = DRM_FORMAT_XRGB2101010; 3031 else 3032 fmt = DRM_FORMAT_ARGB8888; 3033 break; 3034 default: 3035 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3036 fmt = DRM_FORMAT_XRGB8888; 3037 break; 3038 } 3039 3040 return fmt; 3041 } 3042 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3043 3044 /** 3045 * drm_mode_addfb - add an FB to the graphics configuration 3046 * @dev: drm device for the ioctl 3047 * @data: data pointer for the ioctl 3048 * @file_priv: drm file for the ioctl call 3049 * 3050 * Add a new FB to the specified CRTC, given a user request. This is the 3051 * original addfb ioctl which only supported RGB formats. 3052 * 3053 * Called by the user via ioctl. 3054 * 3055 * Returns: 3056 * Zero on success, negative errno on failure. 3057 */ 3058 int drm_mode_addfb(struct drm_device *dev, 3059 void *data, struct drm_file *file_priv) 3060 { 3061 struct drm_mode_fb_cmd *or = data; 3062 static const struct drm_mode_fb_cmd2 zero_fbcmd; 3063 struct drm_mode_fb_cmd2 r = zero_fbcmd; 3064 3065 /* convert to new format and call new ioctl */ 3066 r.fb_id = or->fb_id; 3067 r.width = or->width; 3068 r.height = or->height; 3069 r.pitches[0] = or->pitch; 3070 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3071 r.handles[0] = or->handle; 3072 3073 ret = drm_mode_addfb2(dev, &r, file_priv); 3074 if (ret) 3075 return ret; 3076 3077 or->fb_id = r.fb_id; 3078 3079 return 0; 3080 } 3081 3082 static int format_check(const struct drm_mode_fb_cmd2 *r) 3083 { 3084 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3085 3086 switch (format) { 3087 case DRM_FORMAT_C8: 3088 case DRM_FORMAT_RGB332: 3089 case DRM_FORMAT_BGR233: 3090 case DRM_FORMAT_XRGB4444: 3091 case DRM_FORMAT_XBGR4444: 3092 case DRM_FORMAT_RGBX4444: 3093 case DRM_FORMAT_BGRX4444: 3094 case DRM_FORMAT_ARGB4444: 3095 case DRM_FORMAT_ABGR4444: 3096 case DRM_FORMAT_RGBA4444: 3097 case DRM_FORMAT_BGRA4444: 3098 case DRM_FORMAT_XRGB1555: 3099 case DRM_FORMAT_XBGR1555: 3100 case DRM_FORMAT_RGBX5551: 3101 case DRM_FORMAT_BGRX5551: 3102 case DRM_FORMAT_ARGB1555: 3103 case DRM_FORMAT_ABGR1555: 3104 case DRM_FORMAT_RGBA5551: 3105 case DRM_FORMAT_BGRA5551: 3106 case DRM_FORMAT_RGB565: 3107 case DRM_FORMAT_BGR565: 3108 case DRM_FORMAT_RGB888: 3109 case DRM_FORMAT_BGR888: 3110 case DRM_FORMAT_XRGB8888: 3111 case DRM_FORMAT_XBGR8888: 3112 case DRM_FORMAT_RGBX8888: 3113 case DRM_FORMAT_BGRX8888: 3114 case DRM_FORMAT_ARGB8888: 3115 case DRM_FORMAT_ABGR8888: 3116 case DRM_FORMAT_RGBA8888: 3117 case DRM_FORMAT_BGRA8888: 3118 case DRM_FORMAT_XRGB2101010: 3119 case DRM_FORMAT_XBGR2101010: 3120 case DRM_FORMAT_RGBX1010102: 3121 case DRM_FORMAT_BGRX1010102: 3122 case DRM_FORMAT_ARGB2101010: 3123 case DRM_FORMAT_ABGR2101010: 3124 case DRM_FORMAT_RGBA1010102: 3125 case DRM_FORMAT_BGRA1010102: 3126 case DRM_FORMAT_YUYV: 3127 case DRM_FORMAT_YVYU: 3128 case DRM_FORMAT_UYVY: 3129 case DRM_FORMAT_VYUY: 3130 case DRM_FORMAT_AYUV: 3131 case DRM_FORMAT_NV12: 3132 case DRM_FORMAT_NV21: 3133 case DRM_FORMAT_NV16: 3134 case DRM_FORMAT_NV61: 3135 case DRM_FORMAT_NV24: 3136 case DRM_FORMAT_NV42: 3137 case DRM_FORMAT_YUV410: 3138 case DRM_FORMAT_YVU410: 3139 case DRM_FORMAT_YUV411: 3140 case DRM_FORMAT_YVU411: 3141 case DRM_FORMAT_YUV420: 3142 case DRM_FORMAT_YVU420: 3143 case DRM_FORMAT_YUV422: 3144 case DRM_FORMAT_YVU422: 3145 case DRM_FORMAT_YUV444: 3146 case DRM_FORMAT_YVU444: 3147 return 0; 3148 default: 3149 DRM_DEBUG_KMS("invalid pixel format %s\n", 3150 drm_get_format_name(r->pixel_format)); 3151 return -EINVAL; 3152 } 3153 } 3154 3155 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3156 { 3157 int ret, hsub, vsub, num_planes, i; 3158 3159 ret = format_check(r); 3160 if (ret) { 3161 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3162 drm_get_format_name(r->pixel_format)); 3163 return ret; 3164 } 3165 3166 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3167 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3168 num_planes = drm_format_num_planes(r->pixel_format); 3169 3170 if (r->width == 0 || r->width % hsub) { 3171 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3172 return -EINVAL; 3173 } 3174 3175 if (r->height == 0 || r->height % vsub) { 3176 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3177 return -EINVAL; 3178 } 3179 3180 for (i = 0; i < num_planes; i++) { 3181 unsigned int width = r->width / (i != 0 ? hsub : 1); 3182 unsigned int height = r->height / (i != 0 ? vsub : 1); 3183 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3184 3185 if (!r->handles[i]) { 3186 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3187 return -EINVAL; 3188 } 3189 3190 if ((uint64_t) width * cpp > UINT_MAX) 3191 return -ERANGE; 3192 3193 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3194 return -ERANGE; 3195 3196 if (r->pitches[i] < width * cpp) { 3197 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3198 return -EINVAL; 3199 } 3200 3201 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { 3202 DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n", 3203 r->modifier[i], i); 3204 return -EINVAL; 3205 } 3206 3207 /* modifier specific checks: */ 3208 switch (r->modifier[i]) { 3209 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: 3210 /* NOTE: the pitch restriction may be lifted later if it turns 3211 * out that no hw has this restriction: 3212 */ 3213 if (r->pixel_format != DRM_FORMAT_NV12 || 3214 width % 128 || height % 32 || 3215 r->pitches[i] % 128) { 3216 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i); 3217 return -EINVAL; 3218 } 3219 break; 3220 3221 default: 3222 break; 3223 } 3224 } 3225 3226 for (i = num_planes; i < 4; i++) { 3227 if (r->modifier[i]) { 3228 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i); 3229 return -EINVAL; 3230 } 3231 3232 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ 3233 if (!(r->flags & DRM_MODE_FB_MODIFIERS)) 3234 continue; 3235 3236 if (r->handles[i]) { 3237 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i); 3238 return -EINVAL; 3239 } 3240 3241 if (r->pitches[i]) { 3242 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i); 3243 return -EINVAL; 3244 } 3245 3246 if (r->offsets[i]) { 3247 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i); 3248 return -EINVAL; 3249 } 3250 } 3251 3252 return 0; 3253 } 3254 3255 static struct drm_framebuffer * 3256 internal_framebuffer_create(struct drm_device *dev, 3257 struct drm_mode_fb_cmd2 *r, 3258 struct drm_file *file_priv) 3259 { 3260 struct drm_mode_config *config = &dev->mode_config; 3261 struct drm_framebuffer *fb; 3262 int ret; 3263 3264 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { 3265 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3266 return ERR_PTR(-EINVAL); 3267 } 3268 3269 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3270 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3271 r->width, config->min_width, config->max_width); 3272 return ERR_PTR(-EINVAL); 3273 } 3274 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3275 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3276 r->height, config->min_height, config->max_height); 3277 return ERR_PTR(-EINVAL); 3278 } 3279 3280 if (r->flags & DRM_MODE_FB_MODIFIERS && 3281 !dev->mode_config.allow_fb_modifiers) { 3282 DRM_DEBUG_KMS("driver does not support fb modifiers\n"); 3283 return ERR_PTR(-EINVAL); 3284 } 3285 3286 ret = framebuffer_check(r); 3287 if (ret) 3288 return ERR_PTR(ret); 3289 3290 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3291 if (IS_ERR(fb)) { 3292 DRM_DEBUG_KMS("could not create framebuffer\n"); 3293 return fb; 3294 } 3295 3296 return fb; 3297 } 3298 3299 /** 3300 * drm_mode_addfb2 - add an FB to the graphics configuration 3301 * @dev: drm device for the ioctl 3302 * @data: data pointer for the ioctl 3303 * @file_priv: drm file for the ioctl call 3304 * 3305 * Add a new FB to the specified CRTC, given a user request with format. This is 3306 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3307 * and uses fourcc codes as pixel format specifiers. 3308 * 3309 * Called by the user via ioctl. 3310 * 3311 * Returns: 3312 * Zero on success, negative errno on failure. 3313 */ 3314 int drm_mode_addfb2(struct drm_device *dev, 3315 void *data, struct drm_file *file_priv) 3316 { 3317 struct drm_mode_fb_cmd2 *r = data; 3318 struct drm_framebuffer *fb; 3319 3320 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3321 return -EINVAL; 3322 3323 fb = internal_framebuffer_create(dev, r, file_priv); 3324 if (IS_ERR(fb)) 3325 return PTR_ERR(fb); 3326 3327 /* Transfer ownership to the filp for reaping on close */ 3328 3329 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3330 mutex_lock(&file_priv->fbs_lock); 3331 r->fb_id = fb->base.id; 3332 list_add(&fb->filp_head, &file_priv->fbs); 3333 mutex_unlock(&file_priv->fbs_lock); 3334 3335 return 0; 3336 } 3337 3338 struct drm_mode_rmfb_work { 3339 struct work_struct work; 3340 struct list_head fbs; 3341 }; 3342 3343 static void drm_mode_rmfb_work_fn(struct work_struct *w) 3344 { 3345 struct drm_mode_rmfb_work *arg = container_of(w, typeof(*arg), work); 3346 3347 while (!list_empty(&arg->fbs)) { 3348 struct drm_framebuffer *fb = 3349 list_first_entry(&arg->fbs, typeof(*fb), filp_head); 3350 3351 list_del_init(&fb->filp_head); 3352 drm_framebuffer_remove(fb); 3353 } 3354 } 3355 3356 /** 3357 * drm_mode_rmfb - remove an FB from the configuration 3358 * @dev: drm device for the ioctl 3359 * @data: data pointer for the ioctl 3360 * @file_priv: drm file for the ioctl call 3361 * 3362 * Remove the FB specified by the user. 3363 * 3364 * Called by the user via ioctl. 3365 * 3366 * Returns: 3367 * Zero on success, negative errno on failure. 3368 */ 3369 int drm_mode_rmfb(struct drm_device *dev, 3370 void *data, struct drm_file *file_priv) 3371 { 3372 struct drm_framebuffer *fb = NULL; 3373 struct drm_framebuffer *fbl = NULL; 3374 uint32_t *id = data; 3375 int found = 0; 3376 3377 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3378 return -EINVAL; 3379 3380 mutex_lock(&file_priv->fbs_lock); 3381 mutex_lock(&dev->mode_config.fb_lock); 3382 fb = __drm_framebuffer_lookup(dev, *id); 3383 if (!fb) 3384 goto fail_lookup; 3385 3386 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3387 if (fb == fbl) 3388 found = 1; 3389 if (!found) 3390 goto fail_lookup; 3391 3392 list_del_init(&fb->filp_head); 3393 mutex_unlock(&dev->mode_config.fb_lock); 3394 mutex_unlock(&file_priv->fbs_lock); 3395 3396 /* 3397 * we now own the reference that was stored in the fbs list 3398 * 3399 * drm_framebuffer_remove may fail with -EINTR on pending signals, 3400 * so run this in a separate stack as there's no way to correctly 3401 * handle this after the fb is already removed from the lookup table. 3402 */ 3403 if (!kref_exclusive_p(&fb->refcount)) { 3404 struct drm_mode_rmfb_work arg; 3405 3406 INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); 3407 INIT_LIST_HEAD(&arg.fbs); 3408 list_add_tail(&fb->filp_head, &arg.fbs); 3409 3410 schedule_work(&arg.work); 3411 flush_work(&arg.work); 3412 destroy_work_on_stack(&arg.work); 3413 } else 3414 drm_framebuffer_unreference(fb); 3415 3416 return 0; 3417 3418 fail_lookup: 3419 mutex_unlock(&dev->mode_config.fb_lock); 3420 mutex_unlock(&file_priv->fbs_lock); 3421 3422 return -ENOENT; 3423 } 3424 3425 /** 3426 * drm_mode_getfb - get FB info 3427 * @dev: drm device for the ioctl 3428 * @data: data pointer for the ioctl 3429 * @file_priv: drm file for the ioctl call 3430 * 3431 * Lookup the FB given its ID and return info about it. 3432 * 3433 * Called by the user via ioctl. 3434 * 3435 * Returns: 3436 * Zero on success, negative errno on failure. 3437 */ 3438 int drm_mode_getfb(struct drm_device *dev, 3439 void *data, struct drm_file *file_priv) 3440 { 3441 struct drm_mode_fb_cmd *r = data; 3442 struct drm_framebuffer *fb; 3443 int ret; 3444 3445 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3446 return -EINVAL; 3447 3448 fb = drm_framebuffer_lookup(dev, r->fb_id); 3449 if (!fb) 3450 return -ENOENT; 3451 3452 r->height = fb->height; 3453 r->width = fb->width; 3454 r->depth = fb->depth; 3455 r->bpp = fb->bits_per_pixel; 3456 r->pitch = fb->pitches[0]; 3457 if (fb->funcs->create_handle) { 3458 if (file_priv->is_master || 3459 #ifdef __NetBSD__ 3460 DRM_SUSER() || 3461 #else 3462 capable(CAP_SYS_ADMIN) || 3463 #endif 3464 drm_is_control_client(file_priv)) { 3465 ret = fb->funcs->create_handle(fb, file_priv, 3466 &r->handle); 3467 } else { 3468 /* GET_FB() is an unprivileged ioctl so we must not 3469 * return a buffer-handle to non-master processes! For 3470 * backwards-compatibility reasons, we cannot make 3471 * GET_FB() privileged, so just return an invalid handle 3472 * for non-masters. */ 3473 r->handle = 0; 3474 ret = 0; 3475 } 3476 } else { 3477 ret = -ENODEV; 3478 } 3479 3480 drm_framebuffer_unreference(fb); 3481 3482 return ret; 3483 } 3484 3485 /** 3486 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3487 * @dev: drm device for the ioctl 3488 * @data: data pointer for the ioctl 3489 * @file_priv: drm file for the ioctl call 3490 * 3491 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3492 * rectangle list. Generic userspace which does frontbuffer rendering must call 3493 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3494 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3495 * 3496 * Modesetting drivers which always update the frontbuffer do not need to 3497 * implement the corresponding ->dirty framebuffer callback. 3498 * 3499 * Called by the user via ioctl. 3500 * 3501 * Returns: 3502 * Zero on success, negative errno on failure. 3503 */ 3504 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3505 void *data, struct drm_file *file_priv) 3506 { 3507 struct drm_clip_rect __user *clips_ptr; 3508 struct drm_clip_rect *clips = NULL; 3509 struct drm_mode_fb_dirty_cmd *r = data; 3510 struct drm_framebuffer *fb; 3511 unsigned flags; 3512 int num_clips; 3513 int ret; 3514 3515 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3516 return -EINVAL; 3517 3518 fb = drm_framebuffer_lookup(dev, r->fb_id); 3519 if (!fb) 3520 return -ENOENT; 3521 3522 num_clips = r->num_clips; 3523 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3524 3525 if (!num_clips != !clips_ptr) { 3526 ret = -EINVAL; 3527 goto out_err1; 3528 } 3529 3530 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3531 3532 /* If userspace annotates copy, clips must come in pairs */ 3533 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3534 ret = -EINVAL; 3535 goto out_err1; 3536 } 3537 3538 if (num_clips && clips_ptr) { 3539 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3540 ret = -EINVAL; 3541 goto out_err1; 3542 } 3543 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); 3544 if (!clips) { 3545 ret = -ENOMEM; 3546 goto out_err1; 3547 } 3548 3549 ret = copy_from_user(clips, clips_ptr, 3550 num_clips * sizeof(*clips)); 3551 if (ret) { 3552 ret = -EFAULT; 3553 goto out_err2; 3554 } 3555 } 3556 3557 if (fb->funcs->dirty) { 3558 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3559 clips, num_clips); 3560 } else { 3561 ret = -ENOSYS; 3562 } 3563 3564 out_err2: 3565 kfree(clips); 3566 out_err1: 3567 drm_framebuffer_unreference(fb); 3568 3569 return ret; 3570 } 3571 3572 /** 3573 * drm_fb_release - remove and free the FBs on this file 3574 * @priv: drm file for the ioctl 3575 * 3576 * Destroy all the FBs associated with @filp. 3577 * 3578 * Called by the user via ioctl. 3579 * 3580 * Returns: 3581 * Zero on success, negative errno on failure. 3582 */ 3583 void drm_fb_release(struct drm_file *priv) 3584 { 3585 struct drm_framebuffer *fb, *tfb; 3586 struct drm_mode_rmfb_work arg; 3587 3588 INIT_LIST_HEAD(&arg.fbs); 3589 3590 /* 3591 * When the file gets released that means no one else can access the fb 3592 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3593 * avoid upsetting lockdep since the universal cursor code adds a 3594 * framebuffer while holding mutex locks. 3595 * 3596 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3597 * locks is impossible here since no one else but this function can get 3598 * at it any more. 3599 */ 3600 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3601 if (!kref_exclusive_p(&fb->refcount)) { 3602 list_move_tail(&fb->filp_head, &arg.fbs); 3603 } else { 3604 list_del_init(&fb->filp_head); 3605 3606 /* This drops the fpriv->fbs reference. */ 3607 drm_framebuffer_unreference(fb); 3608 } 3609 } 3610 3611 if (!list_empty(&arg.fbs)) { 3612 INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); 3613 3614 schedule_work(&arg.work); 3615 flush_work(&arg.work); 3616 destroy_work_on_stack(&arg.work); 3617 } 3618 } 3619 3620 /** 3621 * drm_property_create - create a new property type 3622 * @dev: drm device 3623 * @flags: flags specifying the property type 3624 * @name: name of the property 3625 * @num_values: number of pre-defined values 3626 * 3627 * This creates a new generic drm property which can then be attached to a drm 3628 * object with drm_object_attach_property. The returned property object must be 3629 * freed with drm_property_destroy. 3630 * 3631 * Note that the DRM core keeps a per-device list of properties and that, if 3632 * drm_mode_config_cleanup() is called, it will destroy all properties created 3633 * by the driver. 3634 * 3635 * Returns: 3636 * A pointer to the newly created property on success, NULL on failure. 3637 */ 3638 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3639 const char *name, int num_values) 3640 { 3641 struct drm_property *property = NULL; 3642 int ret; 3643 3644 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3645 if (!property) 3646 return NULL; 3647 3648 property->dev = dev; 3649 3650 if (num_values) { 3651 property->values = kcalloc(num_values, sizeof(uint64_t), 3652 GFP_KERNEL); 3653 if (!property->values) 3654 goto fail; 3655 } 3656 3657 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3658 if (ret) 3659 goto fail; 3660 3661 property->flags = flags; 3662 property->num_values = num_values; 3663 INIT_LIST_HEAD(&property->enum_list); 3664 3665 if (name) { 3666 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3667 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3668 } 3669 3670 list_add_tail(&property->head, &dev->mode_config.property_list); 3671 3672 WARN_ON(!drm_property_type_valid(property)); 3673 3674 return property; 3675 fail: 3676 kfree(property->values); 3677 kfree(property); 3678 return NULL; 3679 } 3680 EXPORT_SYMBOL(drm_property_create); 3681 3682 /** 3683 * drm_property_create_enum - create a new enumeration property type 3684 * @dev: drm device 3685 * @flags: flags specifying the property type 3686 * @name: name of the property 3687 * @props: enumeration lists with property values 3688 * @num_values: number of pre-defined values 3689 * 3690 * This creates a new generic drm property which can then be attached to a drm 3691 * object with drm_object_attach_property. The returned property object must be 3692 * freed with drm_property_destroy. 3693 * 3694 * Userspace is only allowed to set one of the predefined values for enumeration 3695 * properties. 3696 * 3697 * Returns: 3698 * A pointer to the newly created property on success, NULL on failure. 3699 */ 3700 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3701 const char *name, 3702 const struct drm_prop_enum_list *props, 3703 int num_values) 3704 { 3705 struct drm_property *property; 3706 int i, ret; 3707 3708 flags |= DRM_MODE_PROP_ENUM; 3709 3710 property = drm_property_create(dev, flags, name, num_values); 3711 if (!property) 3712 return NULL; 3713 3714 for (i = 0; i < num_values; i++) { 3715 ret = drm_property_add_enum(property, i, 3716 props[i].type, 3717 props[i].name); 3718 if (ret) { 3719 drm_property_destroy(dev, property); 3720 return NULL; 3721 } 3722 } 3723 3724 return property; 3725 } 3726 EXPORT_SYMBOL(drm_property_create_enum); 3727 3728 /** 3729 * drm_property_create_bitmask - create a new bitmask property type 3730 * @dev: drm device 3731 * @flags: flags specifying the property type 3732 * @name: name of the property 3733 * @props: enumeration lists with property bitflags 3734 * @num_props: size of the @props array 3735 * @supported_bits: bitmask of all supported enumeration values 3736 * 3737 * This creates a new bitmask drm property which can then be attached to a drm 3738 * object with drm_object_attach_property. The returned property object must be 3739 * freed with drm_property_destroy. 3740 * 3741 * Compared to plain enumeration properties userspace is allowed to set any 3742 * or'ed together combination of the predefined property bitflag values 3743 * 3744 * Returns: 3745 * A pointer to the newly created property on success, NULL on failure. 3746 */ 3747 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3748 int flags, const char *name, 3749 const struct drm_prop_enum_list *props, 3750 int num_props, 3751 uint64_t supported_bits) 3752 { 3753 struct drm_property *property; 3754 int i, ret, index = 0; 3755 int num_values = hweight64(supported_bits); 3756 3757 flags |= DRM_MODE_PROP_BITMASK; 3758 3759 property = drm_property_create(dev, flags, name, num_values); 3760 if (!property) 3761 return NULL; 3762 for (i = 0; i < num_props; i++) { 3763 if (!(supported_bits & (1ULL << props[i].type))) 3764 continue; 3765 3766 if (WARN_ON(index >= num_values)) { 3767 drm_property_destroy(dev, property); 3768 return NULL; 3769 } 3770 3771 ret = drm_property_add_enum(property, index++, 3772 props[i].type, 3773 props[i].name); 3774 if (ret) { 3775 drm_property_destroy(dev, property); 3776 return NULL; 3777 } 3778 } 3779 3780 return property; 3781 } 3782 EXPORT_SYMBOL(drm_property_create_bitmask); 3783 3784 static struct drm_property *property_create_range(struct drm_device *dev, 3785 int flags, const char *name, 3786 uint64_t min, uint64_t max) 3787 { 3788 struct drm_property *property; 3789 3790 property = drm_property_create(dev, flags, name, 2); 3791 if (!property) 3792 return NULL; 3793 3794 property->values[0] = min; 3795 property->values[1] = max; 3796 3797 return property; 3798 } 3799 3800 /** 3801 * drm_property_create_range - create a new unsigned ranged property type 3802 * @dev: drm device 3803 * @flags: flags specifying the property type 3804 * @name: name of the property 3805 * @min: minimum value of the property 3806 * @max: maximum value of the property 3807 * 3808 * This creates a new generic drm property which can then be attached to a drm 3809 * object with drm_object_attach_property. The returned property object must be 3810 * freed with drm_property_destroy. 3811 * 3812 * Userspace is allowed to set any unsigned integer value in the (min, max) 3813 * range inclusive. 3814 * 3815 * Returns: 3816 * A pointer to the newly created property on success, NULL on failure. 3817 */ 3818 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3819 const char *name, 3820 uint64_t min, uint64_t max) 3821 { 3822 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3823 name, min, max); 3824 } 3825 EXPORT_SYMBOL(drm_property_create_range); 3826 3827 /** 3828 * drm_property_create_signed_range - create a new signed ranged property type 3829 * @dev: drm device 3830 * @flags: flags specifying the property type 3831 * @name: name of the property 3832 * @min: minimum value of the property 3833 * @max: maximum value of the property 3834 * 3835 * This creates a new generic drm property which can then be attached to a drm 3836 * object with drm_object_attach_property. The returned property object must be 3837 * freed with drm_property_destroy. 3838 * 3839 * Userspace is allowed to set any signed integer value in the (min, max) 3840 * range inclusive. 3841 * 3842 * Returns: 3843 * A pointer to the newly created property on success, NULL on failure. 3844 */ 3845 struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3846 int flags, const char *name, 3847 int64_t min, int64_t max) 3848 { 3849 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3850 name, I642U64(min), I642U64(max)); 3851 } 3852 EXPORT_SYMBOL(drm_property_create_signed_range); 3853 3854 /** 3855 * drm_property_create_object - create a new object property type 3856 * @dev: drm device 3857 * @flags: flags specifying the property type 3858 * @name: name of the property 3859 * @type: object type from DRM_MODE_OBJECT_* defines 3860 * 3861 * This creates a new generic drm property which can then be attached to a drm 3862 * object with drm_object_attach_property. The returned property object must be 3863 * freed with drm_property_destroy. 3864 * 3865 * Userspace is only allowed to set this to any property value of the given 3866 * @type. Only useful for atomic properties, which is enforced. 3867 * 3868 * Returns: 3869 * A pointer to the newly created property on success, NULL on failure. 3870 */ 3871 struct drm_property *drm_property_create_object(struct drm_device *dev, 3872 int flags, const char *name, uint32_t type) 3873 { 3874 struct drm_property *property; 3875 3876 flags |= DRM_MODE_PROP_OBJECT; 3877 3878 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) 3879 return NULL; 3880 3881 property = drm_property_create(dev, flags, name, 1); 3882 if (!property) 3883 return NULL; 3884 3885 property->values[0] = type; 3886 3887 return property; 3888 } 3889 EXPORT_SYMBOL(drm_property_create_object); 3890 3891 /** 3892 * drm_property_create_bool - create a new boolean property type 3893 * @dev: drm device 3894 * @flags: flags specifying the property type 3895 * @name: name of the property 3896 * 3897 * This creates a new generic drm property which can then be attached to a drm 3898 * object with drm_object_attach_property. The returned property object must be 3899 * freed with drm_property_destroy. 3900 * 3901 * This is implemented as a ranged property with only {0, 1} as valid values. 3902 * 3903 * Returns: 3904 * A pointer to the newly created property on success, NULL on failure. 3905 */ 3906 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, 3907 const char *name) 3908 { 3909 return drm_property_create_range(dev, flags, name, 0, 1); 3910 } 3911 EXPORT_SYMBOL(drm_property_create_bool); 3912 3913 /** 3914 * drm_property_add_enum - add a possible value to an enumeration property 3915 * @property: enumeration property to change 3916 * @index: index of the new enumeration 3917 * @value: value of the new enumeration 3918 * @name: symbolic name of the new enumeration 3919 * 3920 * This functions adds enumerations to a property. 3921 * 3922 * It's use is deprecated, drivers should use one of the more specific helpers 3923 * to directly create the property with all enumerations already attached. 3924 * 3925 * Returns: 3926 * Zero on success, error code on failure. 3927 */ 3928 int drm_property_add_enum(struct drm_property *property, int index, 3929 uint64_t value, const char *name) 3930 { 3931 struct drm_property_enum *prop_enum; 3932 3933 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3934 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3935 return -EINVAL; 3936 3937 /* 3938 * Bitmask enum properties have the additional constraint of values 3939 * from 0 to 63 3940 */ 3941 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3942 (value > 63)) 3943 return -EINVAL; 3944 3945 if (!list_empty(&property->enum_list)) { 3946 list_for_each_entry(prop_enum, &property->enum_list, head) { 3947 if (prop_enum->value == value) { 3948 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3949 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3950 return 0; 3951 } 3952 } 3953 } 3954 3955 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3956 if (!prop_enum) 3957 return -ENOMEM; 3958 3959 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3960 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3961 prop_enum->value = value; 3962 3963 property->values[index] = value; 3964 list_add_tail(&prop_enum->head, &property->enum_list); 3965 return 0; 3966 } 3967 EXPORT_SYMBOL(drm_property_add_enum); 3968 3969 /** 3970 * drm_property_destroy - destroy a drm property 3971 * @dev: drm device 3972 * @property: property to destry 3973 * 3974 * This function frees a property including any attached resources like 3975 * enumeration values. 3976 */ 3977 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 3978 { 3979 struct drm_property_enum *prop_enum, *pt; 3980 3981 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 3982 list_del(&prop_enum->head); 3983 kfree(prop_enum); 3984 } 3985 3986 if (property->num_values) 3987 kfree(property->values); 3988 drm_mode_object_put(dev, &property->base); 3989 list_del(&property->head); 3990 kfree(property); 3991 } 3992 EXPORT_SYMBOL(drm_property_destroy); 3993 3994 /** 3995 * drm_object_attach_property - attach a property to a modeset object 3996 * @obj: drm modeset object 3997 * @property: property to attach 3998 * @init_val: initial value of the property 3999 * 4000 * This attaches the given property to the modeset object with the given initial 4001 * value. Currently this function cannot fail since the properties are stored in 4002 * a statically sized array. 4003 */ 4004 void drm_object_attach_property(struct drm_mode_object *obj, 4005 struct drm_property *property, 4006 uint64_t init_val) 4007 { 4008 int count = obj->properties->count; 4009 4010 if (count == DRM_OBJECT_MAX_PROPERTY) { 4011 WARN(1, "Failed to attach object property (type: 0x%x). Please " 4012 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 4013 "you see this message on the same object type.\n", 4014 obj->type); 4015 return; 4016 } 4017 4018 obj->properties->properties[count] = property; 4019 obj->properties->values[count] = init_val; 4020 obj->properties->count++; 4021 if (property->flags & DRM_MODE_PROP_ATOMIC) 4022 obj->properties->atomic_count++; 4023 } 4024 EXPORT_SYMBOL(drm_object_attach_property); 4025 4026 /** 4027 * drm_object_property_set_value - set the value of a property 4028 * @obj: drm mode object to set property value for 4029 * @property: property to set 4030 * @val: value the property should be set to 4031 * 4032 * This functions sets a given property on a given object. This function only 4033 * changes the software state of the property, it does not call into the 4034 * driver's ->set_property callback. 4035 * 4036 * Returns: 4037 * Zero on success, error code on failure. 4038 */ 4039 int drm_object_property_set_value(struct drm_mode_object *obj, 4040 struct drm_property *property, uint64_t val) 4041 { 4042 int i; 4043 4044 for (i = 0; i < obj->properties->count; i++) { 4045 if (obj->properties->properties[i] == property) { 4046 obj->properties->values[i] = val; 4047 return 0; 4048 } 4049 } 4050 4051 return -EINVAL; 4052 } 4053 EXPORT_SYMBOL(drm_object_property_set_value); 4054 4055 /** 4056 * drm_object_property_get_value - retrieve the value of a property 4057 * @obj: drm mode object to get property value from 4058 * @property: property to retrieve 4059 * @val: storage for the property value 4060 * 4061 * This function retrieves the softare state of the given property for the given 4062 * property. Since there is no driver callback to retrieve the current property 4063 * value this might be out of sync with the hardware, depending upon the driver 4064 * and property. 4065 * 4066 * Returns: 4067 * Zero on success, error code on failure. 4068 */ 4069 int drm_object_property_get_value(struct drm_mode_object *obj, 4070 struct drm_property *property, uint64_t *val) 4071 { 4072 int i; 4073 4074 /* read-only properties bypass atomic mechanism and still store 4075 * their value in obj->properties->values[].. mostly to avoid 4076 * having to deal w/ EDID and similar props in atomic paths: 4077 */ 4078 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && 4079 !(property->flags & DRM_MODE_PROP_IMMUTABLE)) 4080 return drm_atomic_get_property(obj, property, val); 4081 4082 for (i = 0; i < obj->properties->count; i++) { 4083 if (obj->properties->properties[i] == property) { 4084 *val = obj->properties->values[i]; 4085 return 0; 4086 } 4087 } 4088 4089 return -EINVAL; 4090 } 4091 EXPORT_SYMBOL(drm_object_property_get_value); 4092 4093 /** 4094 * drm_mode_getproperty_ioctl - get the property metadata 4095 * @dev: DRM device 4096 * @data: ioctl data 4097 * @file_priv: DRM file info 4098 * 4099 * This function retrieves the metadata for a given property, like the different 4100 * possible values for an enum property or the limits for a range property. 4101 * 4102 * Blob properties are special 4103 * 4104 * Called by the user via ioctl. 4105 * 4106 * Returns: 4107 * Zero on success, negative errno on failure. 4108 */ 4109 int drm_mode_getproperty_ioctl(struct drm_device *dev, 4110 void *data, struct drm_file *file_priv) 4111 { 4112 struct drm_mode_get_property *out_resp = data; 4113 struct drm_property *property; 4114 int enum_count = 0; 4115 int value_count = 0; 4116 int ret = 0, i; 4117 int copied; 4118 struct drm_property_enum *prop_enum; 4119 struct drm_mode_property_enum __user *enum_ptr; 4120 uint64_t __user *values_ptr; 4121 4122 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4123 return -EINVAL; 4124 4125 drm_modeset_lock_all(dev); 4126 property = drm_property_find(dev, out_resp->prop_id); 4127 if (!property) { 4128 ret = -ENOENT; 4129 goto done; 4130 } 4131 4132 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4133 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4134 list_for_each_entry(prop_enum, &property->enum_list, head) 4135 enum_count++; 4136 } 4137 4138 value_count = property->num_values; 4139 4140 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 4141 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 4142 out_resp->flags = property->flags; 4143 4144 if ((out_resp->count_values >= value_count) && value_count) { 4145 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 4146 for (i = 0; i < value_count; i++) { 4147 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 4148 ret = -EFAULT; 4149 goto done; 4150 } 4151 } 4152 } 4153 out_resp->count_values = value_count; 4154 4155 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4156 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4157 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 4158 copied = 0; 4159 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 4160 list_for_each_entry(prop_enum, &property->enum_list, head) { 4161 4162 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 4163 ret = -EFAULT; 4164 goto done; 4165 } 4166 4167 if (copy_to_user(&enum_ptr[copied].name, 4168 &prop_enum->name, DRM_PROP_NAME_LEN)) { 4169 ret = -EFAULT; 4170 goto done; 4171 } 4172 copied++; 4173 } 4174 } 4175 out_resp->count_enum_blobs = enum_count; 4176 } 4177 4178 /* 4179 * NOTE: The idea seems to have been to use this to read all the blob 4180 * property values. But nothing ever added them to the corresponding 4181 * list, userspace always used the special-purpose get_blob ioctl to 4182 * read the value for a blob property. It also doesn't make a lot of 4183 * sense to return values here when everything else is just metadata for 4184 * the property itself. 4185 */ 4186 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4187 out_resp->count_enum_blobs = 0; 4188 done: 4189 drm_modeset_unlock_all(dev); 4190 return ret; 4191 } 4192 4193 /** 4194 * drm_property_create_blob - Create new blob property 4195 * 4196 * Creates a new blob property for a specified DRM device, optionally 4197 * copying data. 4198 * 4199 * @dev: DRM device to create property for 4200 * @length: Length to allocate for blob data 4201 * @data: If specified, copies data into blob 4202 * 4203 * Returns: 4204 * New blob property with a single reference on success, or an ERR_PTR 4205 * value on failure. 4206 */ 4207 struct drm_property_blob * 4208 drm_property_create_blob(struct drm_device *dev, size_t length, 4209 const void *data) 4210 { 4211 struct drm_property_blob *blob; 4212 int ret; 4213 4214 if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob)) 4215 return ERR_PTR(-EINVAL); 4216 4217 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4218 if (!blob) 4219 return ERR_PTR(-ENOMEM); 4220 4221 /* This must be explicitly initialised, so we can safely call list_del 4222 * on it in the removal handler, even if it isn't in a file list. */ 4223 INIT_LIST_HEAD(&blob->head_file); 4224 blob->length = length; 4225 blob->dev = dev; 4226 4227 if (data) 4228 memcpy(blob->data, data, length); 4229 4230 mutex_lock(&dev->mode_config.blob_lock); 4231 4232 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 4233 if (ret) { 4234 kfree(blob); 4235 mutex_unlock(&dev->mode_config.blob_lock); 4236 return ERR_PTR(-EINVAL); 4237 } 4238 4239 kref_init(&blob->refcount); 4240 4241 list_add_tail(&blob->head_global, 4242 &dev->mode_config.property_blob_list); 4243 4244 mutex_unlock(&dev->mode_config.blob_lock); 4245 4246 return blob; 4247 } 4248 EXPORT_SYMBOL(drm_property_create_blob); 4249 4250 /** 4251 * drm_property_free_blob - Blob property destructor 4252 * 4253 * Internal free function for blob properties; must not be used directly. 4254 * 4255 * @kref: Reference 4256 */ 4257 static void drm_property_free_blob(struct kref *kref) 4258 { 4259 struct drm_property_blob *blob = 4260 container_of(kref, struct drm_property_blob, refcount); 4261 4262 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock)); 4263 4264 list_del(&blob->head_global); 4265 list_del(&blob->head_file); 4266 drm_mode_object_put(blob->dev, &blob->base); 4267 4268 kfree(blob); 4269 } 4270 4271 /** 4272 * drm_property_unreference_blob - Unreference a blob property 4273 * 4274 * Drop a reference on a blob property. May free the object. 4275 * 4276 * @blob: Pointer to blob property 4277 */ 4278 void drm_property_unreference_blob(struct drm_property_blob *blob) 4279 { 4280 struct drm_device *dev; 4281 4282 if (!blob) 4283 return; 4284 4285 dev = blob->dev; 4286 4287 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, blob->refcount.kr_count); 4288 4289 if (kref_put_mutex(&blob->refcount, drm_property_free_blob, 4290 &dev->mode_config.blob_lock)) 4291 mutex_unlock(&dev->mode_config.blob_lock); 4292 else 4293 might_lock(&dev->mode_config.blob_lock); 4294 } 4295 EXPORT_SYMBOL(drm_property_unreference_blob); 4296 4297 /** 4298 * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held 4299 * 4300 * Drop a reference on a blob property. May free the object. This must be 4301 * called with blob_lock held. 4302 * 4303 * @blob: Pointer to blob property 4304 */ 4305 static void drm_property_unreference_blob_locked(struct drm_property_blob *blob) 4306 { 4307 if (!blob) 4308 return; 4309 4310 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, blob->refcount.kr_count); 4311 4312 kref_put(&blob->refcount, drm_property_free_blob); 4313 } 4314 4315 /** 4316 * drm_property_destroy_user_blobs - destroy all blobs created by this client 4317 * @dev: DRM device 4318 * @file_priv: destroy all blobs owned by this file handle 4319 */ 4320 void drm_property_destroy_user_blobs(struct drm_device *dev, 4321 struct drm_file *file_priv) 4322 { 4323 struct drm_property_blob *blob, *bt; 4324 4325 mutex_lock(&dev->mode_config.blob_lock); 4326 4327 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) { 4328 list_del_init(&blob->head_file); 4329 drm_property_unreference_blob_locked(blob); 4330 } 4331 4332 mutex_unlock(&dev->mode_config.blob_lock); 4333 } 4334 4335 /** 4336 * drm_property_reference_blob - Take a reference on an existing property 4337 * 4338 * Take a new reference on an existing blob property. 4339 * 4340 * @blob: Pointer to blob property 4341 */ 4342 struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob) 4343 { 4344 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, blob->refcount.kr_count); 4345 kref_get(&blob->refcount); 4346 return blob; 4347 } 4348 EXPORT_SYMBOL(drm_property_reference_blob); 4349 4350 /* 4351 * Like drm_property_lookup_blob, but does not return an additional reference. 4352 * Must be called with blob_lock held. 4353 */ 4354 static struct drm_property_blob *__drm_property_lookup_blob(struct drm_device *dev, 4355 uint32_t id) 4356 { 4357 struct drm_mode_object *obj = NULL; 4358 struct drm_property_blob *blob; 4359 4360 WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock)); 4361 4362 mutex_lock(&dev->mode_config.idr_mutex); 4363 obj = idr_find(&dev->mode_config.crtc_idr, id); 4364 if (!obj || (obj->type != DRM_MODE_OBJECT_BLOB) || (obj->id != id)) 4365 blob = NULL; 4366 else 4367 blob = obj_to_blob(obj); 4368 mutex_unlock(&dev->mode_config.idr_mutex); 4369 4370 return blob; 4371 } 4372 4373 /** 4374 * drm_property_lookup_blob - look up a blob property and take a reference 4375 * @dev: drm device 4376 * @id: id of the blob property 4377 * 4378 * If successful, this takes an additional reference to the blob property. 4379 * callers need to make sure to eventually unreference the returned property 4380 * again, using @drm_property_unreference_blob. 4381 */ 4382 struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev, 4383 uint32_t id) 4384 { 4385 struct drm_property_blob *blob; 4386 4387 mutex_lock(&dev->mode_config.blob_lock); 4388 blob = __drm_property_lookup_blob(dev, id); 4389 if (blob) { 4390 if (!kref_get_unless_zero(&blob->refcount)) 4391 blob = NULL; 4392 } 4393 mutex_unlock(&dev->mode_config.blob_lock); 4394 4395 return blob; 4396 } 4397 EXPORT_SYMBOL(drm_property_lookup_blob); 4398 4399 /** 4400 * drm_property_replace_global_blob - atomically replace existing blob property 4401 * @dev: drm device 4402 * @replace: location of blob property pointer to be replaced 4403 * @length: length of data for new blob, or 0 for no data 4404 * @data: content for new blob, or NULL for no data 4405 * @obj_holds_id: optional object for property holding blob ID 4406 * @prop_holds_id: optional property holding blob ID 4407 * @return 0 on success or error on failure 4408 * 4409 * This function will atomically replace a global property in the blob list, 4410 * optionally updating a property which holds the ID of that property. It is 4411 * guaranteed to be atomic: no caller will be allowed to see intermediate 4412 * results, and either the entire operation will succeed and clean up the 4413 * previous property, or it will fail and the state will be unchanged. 4414 * 4415 * If length is 0 or data is NULL, no new blob will be created, and the holding 4416 * property, if specified, will be set to 0. 4417 * 4418 * Access to the replace pointer is assumed to be protected by the caller, e.g. 4419 * by holding the relevant modesetting object lock for its parent. 4420 * 4421 * For example, a drm_connector has a 'PATH' property, which contains the ID 4422 * of a blob property with the value of the MST path information. Calling this 4423 * function with replace pointing to the connector's path_blob_ptr, length and 4424 * data set for the new path information, obj_holds_id set to the connector's 4425 * base object, and prop_holds_id set to the path property name, will perform 4426 * a completely atomic update. The access to path_blob_ptr is protected by the 4427 * caller holding a lock on the connector. 4428 */ 4429 static int drm_property_replace_global_blob(struct drm_device *dev, 4430 struct drm_property_blob **replace, 4431 size_t length, 4432 const void *data, 4433 struct drm_mode_object *obj_holds_id, 4434 struct drm_property *prop_holds_id) 4435 { 4436 struct drm_property_blob *new_blob = NULL; 4437 struct drm_property_blob *old_blob = NULL; 4438 int ret; 4439 4440 WARN_ON(replace == NULL); 4441 4442 old_blob = *replace; 4443 4444 if (length && data) { 4445 new_blob = drm_property_create_blob(dev, length, data); 4446 if (IS_ERR(new_blob)) 4447 return PTR_ERR(new_blob); 4448 } 4449 4450 /* This does not need to be synchronised with blob_lock, as the 4451 * get_properties ioctl locks all modesetting objects, and 4452 * obj_holds_id must be locked before calling here, so we cannot 4453 * have its value out of sync with the list membership modified 4454 * below under blob_lock. */ 4455 if (obj_holds_id) { 4456 ret = drm_object_property_set_value(obj_holds_id, 4457 prop_holds_id, 4458 new_blob ? 4459 new_blob->base.id : 0); 4460 if (ret != 0) 4461 goto err_created; 4462 } 4463 4464 drm_property_unreference_blob(old_blob); 4465 *replace = new_blob; 4466 4467 return 0; 4468 4469 err_created: 4470 drm_property_unreference_blob(new_blob); 4471 return ret; 4472 } 4473 4474 /** 4475 * drm_mode_getblob_ioctl - get the contents of a blob property value 4476 * @dev: DRM device 4477 * @data: ioctl data 4478 * @file_priv: DRM file info 4479 * 4480 * This function retrieves the contents of a blob property. The value stored in 4481 * an object's blob property is just a normal modeset object id. 4482 * 4483 * Called by the user via ioctl. 4484 * 4485 * Returns: 4486 * Zero on success, negative errno on failure. 4487 */ 4488 int drm_mode_getblob_ioctl(struct drm_device *dev, 4489 void *data, struct drm_file *file_priv) 4490 { 4491 struct drm_mode_get_blob *out_resp = data; 4492 struct drm_property_blob *blob; 4493 int ret = 0; 4494 void __user *blob_ptr; 4495 4496 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4497 return -EINVAL; 4498 4499 drm_modeset_lock_all(dev); 4500 mutex_lock(&dev->mode_config.blob_lock); 4501 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4502 if (!blob) { 4503 ret = -ENOENT; 4504 goto done; 4505 } 4506 4507 if (out_resp->length == blob->length) { 4508 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4509 if (copy_to_user(blob_ptr, blob->data, blob->length)) { 4510 ret = -EFAULT; 4511 goto done; 4512 } 4513 } 4514 out_resp->length = blob->length; 4515 4516 done: 4517 mutex_unlock(&dev->mode_config.blob_lock); 4518 drm_modeset_unlock_all(dev); 4519 return ret; 4520 } 4521 4522 /** 4523 * drm_mode_createblob_ioctl - create a new blob property 4524 * @dev: DRM device 4525 * @data: ioctl data 4526 * @file_priv: DRM file info 4527 * 4528 * This function creates a new blob property with user-defined values. In order 4529 * to give us sensible validation and checking when creating, rather than at 4530 * every potential use, we also require a type to be provided upfront. 4531 * 4532 * Called by the user via ioctl. 4533 * 4534 * Returns: 4535 * Zero on success, negative errno on failure. 4536 */ 4537 int drm_mode_createblob_ioctl(struct drm_device *dev, 4538 void *data, struct drm_file *file_priv) 4539 { 4540 struct drm_mode_create_blob *out_resp = data; 4541 struct drm_property_blob *blob; 4542 void __user *blob_ptr; 4543 int ret = 0; 4544 4545 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4546 return -EINVAL; 4547 4548 blob = drm_property_create_blob(dev, out_resp->length, NULL); 4549 if (IS_ERR(blob)) 4550 return PTR_ERR(blob); 4551 4552 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4553 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) { 4554 ret = -EFAULT; 4555 goto out_blob; 4556 } 4557 4558 /* Dropping the lock between create_blob and our access here is safe 4559 * as only the same file_priv can remove the blob; at this point, it is 4560 * not associated with any file_priv. */ 4561 mutex_lock(&dev->mode_config.blob_lock); 4562 out_resp->blob_id = blob->base.id; 4563 list_add_tail(&blob->head_file, &file_priv->blobs); 4564 mutex_unlock(&dev->mode_config.blob_lock); 4565 4566 return 0; 4567 4568 out_blob: 4569 drm_property_unreference_blob(blob); 4570 return ret; 4571 } 4572 4573 /** 4574 * drm_mode_destroyblob_ioctl - destroy a user blob property 4575 * @dev: DRM device 4576 * @data: ioctl data 4577 * @file_priv: DRM file info 4578 * 4579 * Destroy an existing user-defined blob property. 4580 * 4581 * Called by the user via ioctl. 4582 * 4583 * Returns: 4584 * Zero on success, negative errno on failure. 4585 */ 4586 int drm_mode_destroyblob_ioctl(struct drm_device *dev, 4587 void *data, struct drm_file *file_priv) 4588 { 4589 struct drm_mode_destroy_blob *out_resp = data; 4590 struct drm_property_blob *blob = NULL, *bt; 4591 bool found = false; 4592 int ret = 0; 4593 4594 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4595 return -EINVAL; 4596 4597 mutex_lock(&dev->mode_config.blob_lock); 4598 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4599 if (!blob) { 4600 ret = -ENOENT; 4601 goto err; 4602 } 4603 4604 /* Ensure the property was actually created by this user. */ 4605 list_for_each_entry(bt, &file_priv->blobs, head_file) { 4606 if (bt == blob) { 4607 found = true; 4608 break; 4609 } 4610 } 4611 4612 if (!found) { 4613 ret = -EPERM; 4614 goto err; 4615 } 4616 4617 /* We must drop head_file here, because we may not be the last 4618 * reference on the blob. */ 4619 list_del_init(&blob->head_file); 4620 drm_property_unreference_blob_locked(blob); 4621 mutex_unlock(&dev->mode_config.blob_lock); 4622 4623 return 0; 4624 4625 err: 4626 mutex_unlock(&dev->mode_config.blob_lock); 4627 return ret; 4628 } 4629 4630 /** 4631 * drm_mode_connector_set_path_property - set tile property on connector 4632 * @connector: connector to set property on. 4633 * @path: path to use for property; must not be NULL. 4634 * 4635 * This creates a property to expose to userspace to specify a 4636 * connector path. This is mainly used for DisplayPort MST where 4637 * connectors have a topology and we want to allow userspace to give 4638 * them more meaningful names. 4639 * 4640 * Returns: 4641 * Zero on success, negative errno on failure. 4642 */ 4643 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4644 const char *path) 4645 { 4646 struct drm_device *dev = connector->dev; 4647 int ret; 4648 4649 ret = drm_property_replace_global_blob(dev, 4650 &connector->path_blob_ptr, 4651 strlen(path) + 1, 4652 path, 4653 &connector->base, 4654 dev->mode_config.path_property); 4655 return ret; 4656 } 4657 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4658 4659 /** 4660 * drm_mode_connector_set_tile_property - set tile property on connector 4661 * @connector: connector to set property on. 4662 * 4663 * This looks up the tile information for a connector, and creates a 4664 * property for userspace to parse if it exists. The property is of 4665 * the form of 8 integers using ':' as a separator. 4666 * 4667 * Returns: 4668 * Zero on success, errno on failure. 4669 */ 4670 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4671 { 4672 struct drm_device *dev = connector->dev; 4673 char tile[256]; 4674 int ret; 4675 4676 if (!connector->has_tile) { 4677 ret = drm_property_replace_global_blob(dev, 4678 &connector->tile_blob_ptr, 4679 0, 4680 NULL, 4681 &connector->base, 4682 dev->mode_config.tile_property); 4683 return ret; 4684 } 4685 4686 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4687 connector->tile_group->id, connector->tile_is_single_monitor, 4688 connector->num_h_tile, connector->num_v_tile, 4689 connector->tile_h_loc, connector->tile_v_loc, 4690 connector->tile_h_size, connector->tile_v_size); 4691 4692 ret = drm_property_replace_global_blob(dev, 4693 &connector->tile_blob_ptr, 4694 strlen(tile) + 1, 4695 tile, 4696 &connector->base, 4697 dev->mode_config.tile_property); 4698 return ret; 4699 } 4700 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4701 4702 /** 4703 * drm_mode_connector_update_edid_property - update the edid property of a connector 4704 * @connector: drm connector 4705 * @edid: new value of the edid property 4706 * 4707 * This function creates a new blob modeset object and assigns its id to the 4708 * connector's edid property. 4709 * 4710 * Returns: 4711 * Zero on success, negative errno on failure. 4712 */ 4713 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4714 const struct edid *edid) 4715 { 4716 struct drm_device *dev = connector->dev; 4717 size_t size = 0; 4718 int ret; 4719 4720 /* ignore requests to set edid when overridden */ 4721 if (connector->override_edid) 4722 return 0; 4723 4724 if (edid) 4725 size = EDID_LENGTH * (1 + edid->extensions); 4726 4727 ret = drm_property_replace_global_blob(dev, 4728 &connector->edid_blob_ptr, 4729 size, 4730 edid, 4731 &connector->base, 4732 dev->mode_config.edid_property); 4733 return ret; 4734 } 4735 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4736 4737 /* Some properties could refer to dynamic refcnt'd objects, or things that 4738 * need special locking to handle lifetime issues (ie. to ensure the prop 4739 * value doesn't become invalid part way through the property update due to 4740 * race). The value returned by reference via 'obj' should be passed back 4741 * to drm_property_change_valid_put() after the property is set (and the 4742 * object to which the property is attached has a chance to take it's own 4743 * reference). 4744 */ 4745 bool drm_property_change_valid_get(struct drm_property *property, 4746 uint64_t value, struct drm_mode_object **ref) 4747 { 4748 int i; 4749 4750 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4751 return false; 4752 4753 *ref = NULL; 4754 4755 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4756 if (value < property->values[0] || value > property->values[1]) 4757 return false; 4758 return true; 4759 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4760 int64_t svalue = U642I64(value); 4761 4762 if (svalue < U642I64(property->values[0]) || 4763 svalue > U642I64(property->values[1])) 4764 return false; 4765 return true; 4766 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4767 uint64_t valid_mask = 0; 4768 4769 for (i = 0; i < property->num_values; i++) 4770 valid_mask |= (1ULL << property->values[i]); 4771 return !(value & ~valid_mask); 4772 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4773 struct drm_property_blob *blob; 4774 4775 if (value == 0) 4776 return true; 4777 4778 blob = drm_property_lookup_blob(property->dev, value); 4779 if (blob) { 4780 *ref = &blob->base; 4781 return true; 4782 } else { 4783 return false; 4784 } 4785 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4786 /* a zero value for an object property translates to null: */ 4787 if (value == 0) 4788 return true; 4789 4790 /* handle refcnt'd objects specially: */ 4791 if (property->values[0] == DRM_MODE_OBJECT_FB) { 4792 struct drm_framebuffer *fb; 4793 fb = drm_framebuffer_lookup(property->dev, value); 4794 if (fb) { 4795 *ref = &fb->base; 4796 return true; 4797 } else { 4798 return false; 4799 } 4800 } else { 4801 return _object_find(property->dev, value, property->values[0]) != NULL; 4802 } 4803 } 4804 4805 for (i = 0; i < property->num_values; i++) 4806 if (property->values[i] == value) 4807 return true; 4808 return false; 4809 } 4810 4811 void drm_property_change_valid_put(struct drm_property *property, 4812 struct drm_mode_object *ref) 4813 { 4814 if (!ref) 4815 return; 4816 4817 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4818 if (property->values[0] == DRM_MODE_OBJECT_FB) 4819 drm_framebuffer_unreference(obj_to_fb(ref)); 4820 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4821 drm_property_unreference_blob(obj_to_blob(ref)); 4822 } 4823 4824 /** 4825 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4826 * @dev: DRM device 4827 * @data: ioctl data 4828 * @file_priv: DRM file info 4829 * 4830 * This function sets the current value for a connectors's property. It also 4831 * calls into a driver's ->set_property callback to update the hardware state 4832 * 4833 * Called by the user via ioctl. 4834 * 4835 * Returns: 4836 * Zero on success, negative errno on failure. 4837 */ 4838 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4839 void *data, struct drm_file *file_priv) 4840 { 4841 struct drm_mode_connector_set_property *conn_set_prop = data; 4842 struct drm_mode_obj_set_property obj_set_prop = { 4843 .value = conn_set_prop->value, 4844 .prop_id = conn_set_prop->prop_id, 4845 .obj_id = conn_set_prop->connector_id, 4846 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4847 }; 4848 4849 /* It does all the locking and checking we need */ 4850 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4851 } 4852 4853 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4854 struct drm_property *property, 4855 uint64_t value) 4856 { 4857 int ret = -EINVAL; 4858 struct drm_connector *connector = obj_to_connector(obj); 4859 4860 /* Do DPMS ourselves */ 4861 if (property == connector->dev->mode_config.dpms_property) { 4862 ret = 0; 4863 if (connector->funcs->dpms) 4864 ret = (*connector->funcs->dpms)(connector, (int)value); 4865 } else if (connector->funcs->set_property) 4866 ret = connector->funcs->set_property(connector, property, value); 4867 4868 /* store the property value if successful */ 4869 if (!ret) 4870 drm_object_property_set_value(&connector->base, property, value); 4871 return ret; 4872 } 4873 4874 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4875 struct drm_property *property, 4876 uint64_t value) 4877 { 4878 int ret = -EINVAL; 4879 struct drm_crtc *crtc = obj_to_crtc(obj); 4880 4881 if (crtc->funcs->set_property) 4882 ret = crtc->funcs->set_property(crtc, property, value); 4883 if (!ret) 4884 drm_object_property_set_value(obj, property, value); 4885 4886 return ret; 4887 } 4888 4889 /** 4890 * drm_mode_plane_set_obj_prop - set the value of a property 4891 * @plane: drm plane object to set property value for 4892 * @property: property to set 4893 * @value: value the property should be set to 4894 * 4895 * This functions sets a given property on a given plane object. This function 4896 * calls the driver's ->set_property callback and changes the software state of 4897 * the property if the callback succeeds. 4898 * 4899 * Returns: 4900 * Zero on success, error code on failure. 4901 */ 4902 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4903 struct drm_property *property, 4904 uint64_t value) 4905 { 4906 int ret = -EINVAL; 4907 struct drm_mode_object *obj = &plane->base; 4908 4909 if (plane->funcs->set_property) 4910 ret = plane->funcs->set_property(plane, property, value); 4911 if (!ret) 4912 drm_object_property_set_value(obj, property, value); 4913 4914 return ret; 4915 } 4916 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4917 4918 /** 4919 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 4920 * @dev: DRM device 4921 * @data: ioctl data 4922 * @file_priv: DRM file info 4923 * 4924 * This function retrieves the current value for an object's property. Compared 4925 * to the connector specific ioctl this one is extended to also work on crtc and 4926 * plane objects. 4927 * 4928 * Called by the user via ioctl. 4929 * 4930 * Returns: 4931 * Zero on success, negative errno on failure. 4932 */ 4933 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4934 struct drm_file *file_priv) 4935 { 4936 struct drm_mode_obj_get_properties *arg = data; 4937 struct drm_mode_object *obj; 4938 int ret = 0; 4939 4940 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4941 return -EINVAL; 4942 4943 drm_modeset_lock_all(dev); 4944 4945 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4946 if (!obj) { 4947 ret = -ENOENT; 4948 goto out; 4949 } 4950 if (!obj->properties) { 4951 ret = -EINVAL; 4952 goto out; 4953 } 4954 4955 ret = get_properties(obj, file_priv->atomic, 4956 (uint32_t __user *)(unsigned long)(arg->props_ptr), 4957 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), 4958 &arg->count_props); 4959 4960 out: 4961 drm_modeset_unlock_all(dev); 4962 return ret; 4963 } 4964 4965 /** 4966 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 4967 * @dev: DRM device 4968 * @data: ioctl data 4969 * @file_priv: DRM file info 4970 * 4971 * This function sets the current value for an object's property. It also calls 4972 * into a driver's ->set_property callback to update the hardware state. 4973 * Compared to the connector specific ioctl this one is extended to also work on 4974 * crtc and plane objects. 4975 * 4976 * Called by the user via ioctl. 4977 * 4978 * Returns: 4979 * Zero on success, negative errno on failure. 4980 */ 4981 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 4982 struct drm_file *file_priv) 4983 { 4984 struct drm_mode_obj_set_property *arg = data; 4985 struct drm_mode_object *arg_obj; 4986 struct drm_mode_object *prop_obj; 4987 struct drm_property *property; 4988 int i, ret = -EINVAL; 4989 struct drm_mode_object *ref; 4990 4991 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4992 return -EINVAL; 4993 4994 drm_modeset_lock_all(dev); 4995 4996 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4997 if (!arg_obj) { 4998 ret = -ENOENT; 4999 goto out; 5000 } 5001 if (!arg_obj->properties) 5002 goto out; 5003 5004 for (i = 0; i < arg_obj->properties->count; i++) 5005 if (arg_obj->properties->properties[i]->base.id == arg->prop_id) 5006 break; 5007 5008 if (i == arg_obj->properties->count) 5009 goto out; 5010 5011 prop_obj = drm_mode_object_find(dev, arg->prop_id, 5012 DRM_MODE_OBJECT_PROPERTY); 5013 if (!prop_obj) { 5014 ret = -ENOENT; 5015 goto out; 5016 } 5017 property = obj_to_property(prop_obj); 5018 5019 if (!drm_property_change_valid_get(property, arg->value, &ref)) 5020 goto out; 5021 5022 switch (arg_obj->type) { 5023 case DRM_MODE_OBJECT_CONNECTOR: 5024 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 5025 arg->value); 5026 break; 5027 case DRM_MODE_OBJECT_CRTC: 5028 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 5029 break; 5030 case DRM_MODE_OBJECT_PLANE: 5031 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 5032 property, arg->value); 5033 break; 5034 } 5035 5036 drm_property_change_valid_put(property, ref); 5037 5038 out: 5039 drm_modeset_unlock_all(dev); 5040 return ret; 5041 } 5042 5043 /** 5044 * drm_mode_connector_attach_encoder - attach a connector to an encoder 5045 * @connector: connector to attach 5046 * @encoder: encoder to attach @connector to 5047 * 5048 * This function links up a connector to an encoder. Note that the routing 5049 * restrictions between encoders and crtcs are exposed to userspace through the 5050 * possible_clones and possible_crtcs bitmasks. 5051 * 5052 * Returns: 5053 * Zero on success, negative errno on failure. 5054 */ 5055 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 5056 struct drm_encoder *encoder) 5057 { 5058 int i; 5059 5060 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 5061 if (connector->encoder_ids[i] == 0) { 5062 connector->encoder_ids[i] = encoder->base.id; 5063 return 0; 5064 } 5065 } 5066 return -ENOMEM; 5067 } 5068 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 5069 5070 /** 5071 * drm_mode_crtc_set_gamma_size - set the gamma table size 5072 * @crtc: CRTC to set the gamma table size for 5073 * @gamma_size: size of the gamma table 5074 * 5075 * Drivers which support gamma tables should set this to the supported gamma 5076 * table size when initializing the CRTC. Currently the drm core only supports a 5077 * fixed gamma table size. 5078 * 5079 * Returns: 5080 * Zero on success, negative errno on failure. 5081 */ 5082 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 5083 int gamma_size) 5084 { 5085 crtc->gamma_size = gamma_size; 5086 5087 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, 5088 GFP_KERNEL); 5089 if (!crtc->gamma_store) { 5090 crtc->gamma_size = 0; 5091 return -ENOMEM; 5092 } 5093 5094 return 0; 5095 } 5096 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 5097 5098 /** 5099 * drm_mode_gamma_set_ioctl - set the gamma table 5100 * @dev: DRM device 5101 * @data: ioctl data 5102 * @file_priv: DRM file info 5103 * 5104 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 5105 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 5106 * 5107 * Called by the user via ioctl. 5108 * 5109 * Returns: 5110 * Zero on success, negative errno on failure. 5111 */ 5112 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 5113 void *data, struct drm_file *file_priv) 5114 { 5115 struct drm_mode_crtc_lut *crtc_lut = data; 5116 struct drm_crtc *crtc; 5117 void *r_base, *g_base, *b_base; 5118 int size; 5119 int ret = 0; 5120 5121 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5122 return -EINVAL; 5123 5124 drm_modeset_lock_all(dev); 5125 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5126 if (!crtc) { 5127 ret = -ENOENT; 5128 goto out; 5129 } 5130 5131 if (crtc->funcs->gamma_set == NULL) { 5132 ret = -ENOSYS; 5133 goto out; 5134 } 5135 5136 /* memcpy into gamma store */ 5137 if (crtc_lut->gamma_size != crtc->gamma_size) { 5138 ret = -EINVAL; 5139 goto out; 5140 } 5141 5142 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5143 r_base = crtc->gamma_store; 5144 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 5145 ret = -EFAULT; 5146 goto out; 5147 } 5148 5149 g_base = (char *)r_base + size; 5150 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 5151 ret = -EFAULT; 5152 goto out; 5153 } 5154 5155 b_base = (char *)g_base + size; 5156 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 5157 ret = -EFAULT; 5158 goto out; 5159 } 5160 5161 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 5162 5163 out: 5164 drm_modeset_unlock_all(dev); 5165 return ret; 5166 5167 } 5168 5169 /** 5170 * drm_mode_gamma_get_ioctl - get the gamma table 5171 * @dev: DRM device 5172 * @data: ioctl data 5173 * @file_priv: DRM file info 5174 * 5175 * Copy the current gamma table into the storage provided. This also provides 5176 * the gamma table size the driver expects, which can be used to size the 5177 * allocated storage. 5178 * 5179 * Called by the user via ioctl. 5180 * 5181 * Returns: 5182 * Zero on success, negative errno on failure. 5183 */ 5184 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 5185 void *data, struct drm_file *file_priv) 5186 { 5187 struct drm_mode_crtc_lut *crtc_lut = data; 5188 struct drm_crtc *crtc; 5189 void *r_base, *g_base, *b_base; 5190 int size; 5191 int ret = 0; 5192 5193 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5194 return -EINVAL; 5195 5196 drm_modeset_lock_all(dev); 5197 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5198 if (!crtc) { 5199 ret = -ENOENT; 5200 goto out; 5201 } 5202 5203 /* memcpy into gamma store */ 5204 if (crtc_lut->gamma_size != crtc->gamma_size) { 5205 ret = -EINVAL; 5206 goto out; 5207 } 5208 5209 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5210 r_base = crtc->gamma_store; 5211 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 5212 ret = -EFAULT; 5213 goto out; 5214 } 5215 5216 g_base = (char *)r_base + size; 5217 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 5218 ret = -EFAULT; 5219 goto out; 5220 } 5221 5222 b_base = (char *)g_base + size; 5223 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 5224 ret = -EFAULT; 5225 goto out; 5226 } 5227 out: 5228 drm_modeset_unlock_all(dev); 5229 return ret; 5230 } 5231 5232 /** 5233 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 5234 * @dev: DRM device 5235 * @data: ioctl data 5236 * @file_priv: DRM file info 5237 * 5238 * This schedules an asynchronous update on a given CRTC, called page flip. 5239 * Optionally a drm event is generated to signal the completion of the event. 5240 * Generic drivers cannot assume that a pageflip with changed framebuffer 5241 * properties (including driver specific metadata like tiling layout) will work, 5242 * but some drivers support e.g. pixel format changes through the pageflip 5243 * ioctl. 5244 * 5245 * Called by the user via ioctl. 5246 * 5247 * Returns: 5248 * Zero on success, negative errno on failure. 5249 */ 5250 int drm_mode_page_flip_ioctl(struct drm_device *dev, 5251 void *data, struct drm_file *file_priv) 5252 { 5253 struct drm_mode_crtc_page_flip *page_flip = data; 5254 struct drm_crtc *crtc; 5255 struct drm_framebuffer *fb = NULL; 5256 struct drm_pending_vblank_event *e = NULL; 5257 unsigned long flags; 5258 int ret = -EINVAL; 5259 5260 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5261 return -EINVAL; 5262 5263 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 5264 page_flip->reserved != 0) 5265 return -EINVAL; 5266 5267 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 5268 return -EINVAL; 5269 5270 crtc = drm_crtc_find(dev, page_flip->crtc_id); 5271 if (!crtc) 5272 return -ENOENT; 5273 5274 drm_modeset_lock_crtc(crtc, crtc->primary); 5275 if (crtc->primary->fb == NULL) { 5276 /* The framebuffer is currently unbound, presumably 5277 * due to a hotplug event, that userspace has not 5278 * yet discovered. 5279 */ 5280 ret = -EBUSY; 5281 goto out; 5282 } 5283 5284 if (crtc->funcs->page_flip == NULL) 5285 goto out; 5286 5287 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 5288 if (!fb) { 5289 ret = -ENOENT; 5290 goto out; 5291 } 5292 5293 if (crtc->state) { 5294 const struct drm_plane_state *state = crtc->primary->state; 5295 5296 ret = check_src_coords(state->src_x, state->src_y, 5297 state->src_w, state->src_h, fb); 5298 } else { 5299 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 5300 } 5301 if (ret) 5302 goto out; 5303 5304 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 5305 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 5306 ret = -EINVAL; 5307 goto out; 5308 } 5309 5310 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5311 ret = -ENOMEM; 5312 spin_lock_irqsave(&dev->event_lock, flags); 5313 if (file_priv->event_space < sizeof(e->event)) { 5314 spin_unlock_irqrestore(&dev->event_lock, flags); 5315 goto out; 5316 } 5317 file_priv->event_space -= sizeof(e->event); 5318 spin_unlock_irqrestore(&dev->event_lock, flags); 5319 5320 e = kzalloc(sizeof(*e), GFP_KERNEL); 5321 if (e == NULL) { 5322 spin_lock_irqsave(&dev->event_lock, flags); 5323 file_priv->event_space += sizeof(e->event); 5324 spin_unlock_irqrestore(&dev->event_lock, flags); 5325 goto out; 5326 } 5327 5328 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 5329 e->event.base.length = sizeof(e->event); 5330 e->event.user_data = page_flip->user_data; 5331 e->base.event = &e->event.base; 5332 e->base.file_priv = file_priv; 5333 e->base.destroy = 5334 (void (*) (struct drm_pending_event *)) kfree; 5335 } 5336 5337 crtc->primary->old_fb = crtc->primary->fb; 5338 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 5339 if (ret) { 5340 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5341 spin_lock_irqsave(&dev->event_lock, flags); 5342 file_priv->event_space += sizeof(e->event); 5343 spin_unlock_irqrestore(&dev->event_lock, flags); 5344 kfree(e); 5345 } 5346 /* Keep the old fb, don't unref it. */ 5347 crtc->primary->old_fb = NULL; 5348 } else { 5349 crtc->primary->fb = fb; 5350 /* Unref only the old framebuffer. */ 5351 fb = NULL; 5352 } 5353 5354 out: 5355 if (fb) 5356 drm_framebuffer_unreference(fb); 5357 if (crtc->primary->old_fb) 5358 drm_framebuffer_unreference(crtc->primary->old_fb); 5359 crtc->primary->old_fb = NULL; 5360 drm_modeset_unlock_crtc(crtc); 5361 5362 return ret; 5363 } 5364 5365 /** 5366 * drm_mode_config_reset - call ->reset callbacks 5367 * @dev: drm device 5368 * 5369 * This functions calls all the crtc's, encoder's and connector's ->reset 5370 * callback. Drivers can use this in e.g. their driver load or resume code to 5371 * reset hardware and software state. 5372 */ 5373 void drm_mode_config_reset(struct drm_device *dev) 5374 { 5375 struct drm_crtc *crtc; 5376 struct drm_plane *plane; 5377 struct drm_encoder *encoder; 5378 struct drm_connector *connector; 5379 5380 drm_for_each_plane(plane, dev) 5381 if (plane->funcs->reset) 5382 plane->funcs->reset(plane); 5383 5384 drm_for_each_crtc(crtc, dev) 5385 if (crtc->funcs->reset) 5386 crtc->funcs->reset(crtc); 5387 5388 drm_for_each_encoder(encoder, dev) 5389 if (encoder->funcs->reset) 5390 encoder->funcs->reset(encoder); 5391 5392 mutex_lock(&dev->mode_config.mutex); 5393 drm_for_each_connector(connector, dev) 5394 if (connector->funcs->reset) 5395 connector->funcs->reset(connector); 5396 mutex_unlock(&dev->mode_config.mutex); 5397 } 5398 EXPORT_SYMBOL(drm_mode_config_reset); 5399 5400 /** 5401 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 5402 * @dev: DRM device 5403 * @data: ioctl data 5404 * @file_priv: DRM file info 5405 * 5406 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 5407 * TTM or something else entirely) and returns the resulting buffer handle. This 5408 * handle can then be wrapped up into a framebuffer modeset object. 5409 * 5410 * Note that userspace is not allowed to use such objects for render 5411 * acceleration - drivers must create their own private ioctls for such a use 5412 * case. 5413 * 5414 * Called by the user via ioctl. 5415 * 5416 * Returns: 5417 * Zero on success, negative errno on failure. 5418 */ 5419 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 5420 void *data, struct drm_file *file_priv) 5421 { 5422 struct drm_mode_create_dumb *args = data; 5423 u32 cpp, stride, size; 5424 5425 if (!dev->driver->dumb_create) 5426 return -ENOSYS; 5427 if (!args->width || !args->height || !args->bpp) 5428 return -EINVAL; 5429 5430 /* overflow checks for 32bit size calculations */ 5431 /* NOTE: DIV_ROUND_UP() can overflow */ 5432 cpp = DIV_ROUND_UP(args->bpp, 8); 5433 if (!cpp || cpp > 0xffffffffU / args->width) 5434 return -EINVAL; 5435 stride = cpp * args->width; 5436 if (args->height > 0xffffffffU / stride) 5437 return -EINVAL; 5438 5439 /* test for wrap-around */ 5440 size = args->height * stride; 5441 if (PAGE_ALIGN(size) == 0) 5442 return -EINVAL; 5443 5444 /* 5445 * handle, pitch and size are output parameters. Zero them out to 5446 * prevent drivers from accidentally using uninitialized data. Since 5447 * not all existing userspace is clearing these fields properly we 5448 * cannot reject IOCTL with garbage in them. 5449 */ 5450 args->handle = 0; 5451 args->pitch = 0; 5452 args->size = 0; 5453 5454 return dev->driver->dumb_create(file_priv, dev, args); 5455 } 5456 5457 /** 5458 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 5459 * @dev: DRM device 5460 * @data: ioctl data 5461 * @file_priv: DRM file info 5462 * 5463 * Allocate an offset in the drm device node's address space to be able to 5464 * memory map a dumb buffer. 5465 * 5466 * Called by the user via ioctl. 5467 * 5468 * Returns: 5469 * Zero on success, negative errno on failure. 5470 */ 5471 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 5472 void *data, struct drm_file *file_priv) 5473 { 5474 struct drm_mode_map_dumb *args = data; 5475 5476 /* call driver ioctl to get mmap offset */ 5477 if (!dev->driver->dumb_map_offset) 5478 return -ENOSYS; 5479 5480 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 5481 } 5482 5483 /** 5484 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 5485 * @dev: DRM device 5486 * @data: ioctl data 5487 * @file_priv: DRM file info 5488 * 5489 * This destroys the userspace handle for the given dumb backing storage buffer. 5490 * Since buffer objects must be reference counted in the kernel a buffer object 5491 * won't be immediately freed if a framebuffer modeset object still uses it. 5492 * 5493 * Called by the user via ioctl. 5494 * 5495 * Returns: 5496 * Zero on success, negative errno on failure. 5497 */ 5498 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 5499 void *data, struct drm_file *file_priv) 5500 { 5501 struct drm_mode_destroy_dumb *args = data; 5502 5503 if (!dev->driver->dumb_destroy) 5504 return -ENOSYS; 5505 5506 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 5507 } 5508 5509 /** 5510 * drm_fb_get_bpp_depth - get the bpp/depth values for format 5511 * @format: pixel format (DRM_FORMAT_*) 5512 * @depth: storage for the depth value 5513 * @bpp: storage for the bpp value 5514 * 5515 * This only supports RGB formats here for compat with code that doesn't use 5516 * pixel formats directly yet. 5517 */ 5518 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 5519 int *bpp) 5520 { 5521 switch (format) { 5522 case DRM_FORMAT_C8: 5523 case DRM_FORMAT_RGB332: 5524 case DRM_FORMAT_BGR233: 5525 *depth = 8; 5526 *bpp = 8; 5527 break; 5528 case DRM_FORMAT_XRGB1555: 5529 case DRM_FORMAT_XBGR1555: 5530 case DRM_FORMAT_RGBX5551: 5531 case DRM_FORMAT_BGRX5551: 5532 case DRM_FORMAT_ARGB1555: 5533 case DRM_FORMAT_ABGR1555: 5534 case DRM_FORMAT_RGBA5551: 5535 case DRM_FORMAT_BGRA5551: 5536 *depth = 15; 5537 *bpp = 16; 5538 break; 5539 case DRM_FORMAT_RGB565: 5540 case DRM_FORMAT_BGR565: 5541 *depth = 16; 5542 *bpp = 16; 5543 break; 5544 case DRM_FORMAT_RGB888: 5545 case DRM_FORMAT_BGR888: 5546 *depth = 24; 5547 *bpp = 24; 5548 break; 5549 case DRM_FORMAT_XRGB8888: 5550 case DRM_FORMAT_XBGR8888: 5551 case DRM_FORMAT_RGBX8888: 5552 case DRM_FORMAT_BGRX8888: 5553 *depth = 24; 5554 *bpp = 32; 5555 break; 5556 case DRM_FORMAT_XRGB2101010: 5557 case DRM_FORMAT_XBGR2101010: 5558 case DRM_FORMAT_RGBX1010102: 5559 case DRM_FORMAT_BGRX1010102: 5560 case DRM_FORMAT_ARGB2101010: 5561 case DRM_FORMAT_ABGR2101010: 5562 case DRM_FORMAT_RGBA1010102: 5563 case DRM_FORMAT_BGRA1010102: 5564 *depth = 30; 5565 *bpp = 32; 5566 break; 5567 case DRM_FORMAT_ARGB8888: 5568 case DRM_FORMAT_ABGR8888: 5569 case DRM_FORMAT_RGBA8888: 5570 case DRM_FORMAT_BGRA8888: 5571 *depth = 32; 5572 *bpp = 32; 5573 break; 5574 default: 5575 DRM_DEBUG_KMS("unsupported pixel format %s\n", 5576 drm_get_format_name(format)); 5577 *depth = 0; 5578 *bpp = 0; 5579 break; 5580 } 5581 } 5582 EXPORT_SYMBOL(drm_fb_get_bpp_depth); 5583 5584 /** 5585 * drm_format_num_planes - get the number of planes for format 5586 * @format: pixel format (DRM_FORMAT_*) 5587 * 5588 * Returns: 5589 * The number of planes used by the specified pixel format. 5590 */ 5591 int drm_format_num_planes(uint32_t format) 5592 { 5593 switch (format) { 5594 case DRM_FORMAT_YUV410: 5595 case DRM_FORMAT_YVU410: 5596 case DRM_FORMAT_YUV411: 5597 case DRM_FORMAT_YVU411: 5598 case DRM_FORMAT_YUV420: 5599 case DRM_FORMAT_YVU420: 5600 case DRM_FORMAT_YUV422: 5601 case DRM_FORMAT_YVU422: 5602 case DRM_FORMAT_YUV444: 5603 case DRM_FORMAT_YVU444: 5604 return 3; 5605 case DRM_FORMAT_NV12: 5606 case DRM_FORMAT_NV21: 5607 case DRM_FORMAT_NV16: 5608 case DRM_FORMAT_NV61: 5609 case DRM_FORMAT_NV24: 5610 case DRM_FORMAT_NV42: 5611 return 2; 5612 default: 5613 return 1; 5614 } 5615 } 5616 EXPORT_SYMBOL(drm_format_num_planes); 5617 5618 /** 5619 * drm_format_plane_cpp - determine the bytes per pixel value 5620 * @format: pixel format (DRM_FORMAT_*) 5621 * @plane: plane index 5622 * 5623 * Returns: 5624 * The bytes per pixel value for the specified plane. 5625 */ 5626 int drm_format_plane_cpp(uint32_t format, int plane) 5627 { 5628 unsigned int depth; 5629 int bpp; 5630 5631 if (plane >= drm_format_num_planes(format)) 5632 return 0; 5633 5634 switch (format) { 5635 case DRM_FORMAT_YUYV: 5636 case DRM_FORMAT_YVYU: 5637 case DRM_FORMAT_UYVY: 5638 case DRM_FORMAT_VYUY: 5639 return 2; 5640 case DRM_FORMAT_NV12: 5641 case DRM_FORMAT_NV21: 5642 case DRM_FORMAT_NV16: 5643 case DRM_FORMAT_NV61: 5644 case DRM_FORMAT_NV24: 5645 case DRM_FORMAT_NV42: 5646 return plane ? 2 : 1; 5647 case DRM_FORMAT_YUV410: 5648 case DRM_FORMAT_YVU410: 5649 case DRM_FORMAT_YUV411: 5650 case DRM_FORMAT_YVU411: 5651 case DRM_FORMAT_YUV420: 5652 case DRM_FORMAT_YVU420: 5653 case DRM_FORMAT_YUV422: 5654 case DRM_FORMAT_YVU422: 5655 case DRM_FORMAT_YUV444: 5656 case DRM_FORMAT_YVU444: 5657 return 1; 5658 default: 5659 drm_fb_get_bpp_depth(format, &depth, &bpp); 5660 return bpp >> 3; 5661 } 5662 } 5663 EXPORT_SYMBOL(drm_format_plane_cpp); 5664 5665 /** 5666 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 5667 * @format: pixel format (DRM_FORMAT_*) 5668 * 5669 * Returns: 5670 * The horizontal chroma subsampling factor for the 5671 * specified pixel format. 5672 */ 5673 int drm_format_horz_chroma_subsampling(uint32_t format) 5674 { 5675 switch (format) { 5676 case DRM_FORMAT_YUV411: 5677 case DRM_FORMAT_YVU411: 5678 case DRM_FORMAT_YUV410: 5679 case DRM_FORMAT_YVU410: 5680 return 4; 5681 case DRM_FORMAT_YUYV: 5682 case DRM_FORMAT_YVYU: 5683 case DRM_FORMAT_UYVY: 5684 case DRM_FORMAT_VYUY: 5685 case DRM_FORMAT_NV12: 5686 case DRM_FORMAT_NV21: 5687 case DRM_FORMAT_NV16: 5688 case DRM_FORMAT_NV61: 5689 case DRM_FORMAT_YUV422: 5690 case DRM_FORMAT_YVU422: 5691 case DRM_FORMAT_YUV420: 5692 case DRM_FORMAT_YVU420: 5693 return 2; 5694 default: 5695 return 1; 5696 } 5697 } 5698 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5699 5700 /** 5701 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5702 * @format: pixel format (DRM_FORMAT_*) 5703 * 5704 * Returns: 5705 * The vertical chroma subsampling factor for the 5706 * specified pixel format. 5707 */ 5708 int drm_format_vert_chroma_subsampling(uint32_t format) 5709 { 5710 switch (format) { 5711 case DRM_FORMAT_YUV410: 5712 case DRM_FORMAT_YVU410: 5713 return 4; 5714 case DRM_FORMAT_YUV420: 5715 case DRM_FORMAT_YVU420: 5716 case DRM_FORMAT_NV12: 5717 case DRM_FORMAT_NV21: 5718 return 2; 5719 default: 5720 return 1; 5721 } 5722 } 5723 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5724 5725 /** 5726 * drm_rotation_simplify() - Try to simplify the rotation 5727 * @rotation: Rotation to be simplified 5728 * @supported_rotations: Supported rotations 5729 * 5730 * Attempt to simplify the rotation to a form that is supported. 5731 * Eg. if the hardware supports everything except DRM_REFLECT_X 5732 * one could call this function like this: 5733 * 5734 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5735 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5736 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5737 * 5738 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5739 * transforms the hardware supports, this function may not 5740 * be able to produce a supported transform, so the caller should 5741 * check the result afterwards. 5742 */ 5743 unsigned int drm_rotation_simplify(unsigned int rotation, 5744 unsigned int supported_rotations) 5745 { 5746 if (rotation & ~supported_rotations) { 5747 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5748 rotation = (rotation & DRM_REFLECT_MASK) | 5749 BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4); 5750 } 5751 5752 return rotation; 5753 } 5754 EXPORT_SYMBOL(drm_rotation_simplify); 5755 5756 /** 5757 * drm_mode_config_init - initialize DRM mode_configuration structure 5758 * @dev: DRM device 5759 * 5760 * Initialize @dev's mode_config structure, used for tracking the graphics 5761 * configuration of @dev. 5762 * 5763 * Since this initializes the modeset locks, no locking is possible. Which is no 5764 * problem, since this should happen single threaded at init time. It is the 5765 * driver's problem to ensure this guarantee. 5766 * 5767 */ 5768 void drm_mode_config_init(struct drm_device *dev) 5769 { 5770 #ifdef __NetBSD__ 5771 linux_mutex_init(&dev->mode_config.mutex); 5772 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5773 linux_mutex_init(&dev->mode_config.idr_mutex); 5774 linux_mutex_init(&dev->mode_config.fb_lock); 5775 linux_mutex_init(&dev->mode_config.blob_lock); 5776 #else 5777 mutex_init(&dev->mode_config.mutex); 5778 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5779 mutex_init(&dev->mode_config.idr_mutex); 5780 mutex_init(&dev->mode_config.fb_lock); 5781 mutex_init(&dev->mode_config.blob_lock); 5782 #endif 5783 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5784 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5785 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5786 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5787 INIT_LIST_HEAD(&dev->mode_config.property_list); 5788 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5789 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5790 idr_init(&dev->mode_config.crtc_idr); 5791 idr_init(&dev->mode_config.tile_idr); 5792 5793 drm_modeset_lock_all(dev); 5794 drm_mode_create_standard_properties(dev); 5795 drm_modeset_unlock_all(dev); 5796 5797 /* Just to be sure */ 5798 dev->mode_config.num_fb = 0; 5799 dev->mode_config.num_connector = 0; 5800 dev->mode_config.num_crtc = 0; 5801 dev->mode_config.num_encoder = 0; 5802 dev->mode_config.num_overlay_plane = 0; 5803 dev->mode_config.num_total_plane = 0; 5804 } 5805 EXPORT_SYMBOL(drm_mode_config_init); 5806 5807 /** 5808 * drm_mode_config_cleanup - free up DRM mode_config info 5809 * @dev: DRM device 5810 * 5811 * Free up all the connectors and CRTCs associated with this DRM device, then 5812 * free up the framebuffers and associated buffer objects. 5813 * 5814 * Note that since this /should/ happen single-threaded at driver/device 5815 * teardown time, no locking is required. It's the driver's job to ensure that 5816 * this guarantee actually holds true. 5817 * 5818 * FIXME: cleanup any dangling user buffer objects too 5819 */ 5820 void drm_mode_config_cleanup(struct drm_device *dev) 5821 { 5822 struct drm_connector *connector, *ot; 5823 struct drm_crtc *crtc, *ct; 5824 struct drm_encoder *encoder, *enct; 5825 struct drm_framebuffer *fb, *fbt; 5826 struct drm_property *property, *pt; 5827 struct drm_property_blob *blob, *bt; 5828 struct drm_plane *plane, *plt; 5829 5830 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5831 head) { 5832 encoder->funcs->destroy(encoder); 5833 } 5834 5835 list_for_each_entry_safe(connector, ot, 5836 &dev->mode_config.connector_list, head) { 5837 connector->funcs->destroy(connector); 5838 } 5839 5840 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5841 head) { 5842 drm_property_destroy(dev, property); 5843 } 5844 5845 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5846 head_global) { 5847 drm_property_unreference_blob(blob); 5848 } 5849 5850 /* 5851 * Single-threaded teardown context, so it's not required to grab the 5852 * fb_lock to protect against concurrent fb_list access. Contrary, it 5853 * would actually deadlock with the drm_framebuffer_cleanup function. 5854 * 5855 * Also, if there are any framebuffers left, that's a driver leak now, 5856 * so politely WARN about this. 5857 */ 5858 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5859 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5860 drm_framebuffer_free(&fb->refcount); 5861 } 5862 5863 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5864 head) { 5865 plane->funcs->destroy(plane); 5866 } 5867 5868 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5869 crtc->funcs->destroy(crtc); 5870 } 5871 5872 idr_destroy(&dev->mode_config.tile_idr); 5873 idr_destroy(&dev->mode_config.crtc_idr); 5874 #ifdef __NetBSD__ 5875 linux_mutex_destroy(&dev->mode_config.blob_lock); 5876 linux_mutex_destroy(&dev->mode_config.fb_lock); 5877 linux_mutex_destroy(&dev->mode_config.idr_mutex); 5878 linux_mutex_destroy(&dev->mode_config.mutex); 5879 #endif 5880 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5881 } 5882 EXPORT_SYMBOL(drm_mode_config_cleanup); 5883 5884 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5885 unsigned int supported_rotations) 5886 { 5887 static const struct drm_prop_enum_list props[] = { 5888 { DRM_ROTATE_0, "rotate-0" }, 5889 { DRM_ROTATE_90, "rotate-90" }, 5890 { DRM_ROTATE_180, "rotate-180" }, 5891 { DRM_ROTATE_270, "rotate-270" }, 5892 { DRM_REFLECT_X, "reflect-x" }, 5893 { DRM_REFLECT_Y, "reflect-y" }, 5894 }; 5895 5896 return drm_property_create_bitmask(dev, 0, "rotation", 5897 props, ARRAY_SIZE(props), 5898 supported_rotations); 5899 } 5900 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5901 5902 /** 5903 * DOC: Tile group 5904 * 5905 * Tile groups are used to represent tiled monitors with a unique 5906 * integer identifier. Tiled monitors using DisplayID v1.3 have 5907 * a unique 8-byte handle, we store this in a tile group, so we 5908 * have a common identifier for all tiles in a monitor group. 5909 */ 5910 static void drm_tile_group_free(struct kref *kref) 5911 { 5912 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5913 struct drm_device *dev = tg->dev; 5914 mutex_lock(&dev->mode_config.idr_mutex); 5915 idr_remove(&dev->mode_config.tile_idr, tg->id); 5916 mutex_unlock(&dev->mode_config.idr_mutex); 5917 kfree(tg); 5918 } 5919 5920 /** 5921 * drm_mode_put_tile_group - drop a reference to a tile group. 5922 * @dev: DRM device 5923 * @tg: tile group to drop reference to. 5924 * 5925 * drop reference to tile group and free if 0. 5926 */ 5927 void drm_mode_put_tile_group(struct drm_device *dev, 5928 struct drm_tile_group *tg) 5929 { 5930 kref_put(&tg->refcount, drm_tile_group_free); 5931 } 5932 5933 /** 5934 * drm_mode_get_tile_group - get a reference to an existing tile group 5935 * @dev: DRM device 5936 * @topology: 8-bytes unique per monitor. 5937 * 5938 * Use the unique bytes to get a reference to an existing tile group. 5939 * 5940 * RETURNS: 5941 * tile group or NULL if not found. 5942 */ 5943 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 5944 char topology[8]) 5945 { 5946 struct drm_tile_group *tg; 5947 int id; 5948 mutex_lock(&dev->mode_config.idr_mutex); 5949 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 5950 if (!memcmp(tg->group_data, topology, 8)) { 5951 if (!kref_get_unless_zero(&tg->refcount)) 5952 tg = NULL; 5953 mutex_unlock(&dev->mode_config.idr_mutex); 5954 return tg; 5955 } 5956 } 5957 mutex_unlock(&dev->mode_config.idr_mutex); 5958 return NULL; 5959 } 5960 EXPORT_SYMBOL(drm_mode_get_tile_group); 5961 5962 /** 5963 * drm_mode_create_tile_group - create a tile group from a displayid description 5964 * @dev: DRM device 5965 * @topology: 8-bytes unique per monitor. 5966 * 5967 * Create a tile group for the unique monitor, and get a unique 5968 * identifier for the tile group. 5969 * 5970 * RETURNS: 5971 * new tile group or error. 5972 */ 5973 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 5974 char topology[8]) 5975 { 5976 struct drm_tile_group *tg; 5977 int ret; 5978 5979 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 5980 if (!tg) 5981 return ERR_PTR(-ENOMEM); 5982 5983 kref_init(&tg->refcount); 5984 memcpy(tg->group_data, topology, 8); 5985 tg->dev = dev; 5986 5987 mutex_lock(&dev->mode_config.idr_mutex); 5988 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 5989 if (ret >= 0) { 5990 tg->id = ret; 5991 } else { 5992 kfree(tg); 5993 tg = ERR_PTR(ret); 5994 } 5995 5996 mutex_unlock(&dev->mode_config.idr_mutex); 5997 return tg; 5998 } 5999 EXPORT_SYMBOL(drm_mode_create_tile_group); 6000
Indexes created Fri Sep 26 08:10:20 GMT 2025