drm_crtc.c revision 1.12
1 /* $NetBSD: drm_crtc.c,v 1.12 2020/02/14 04:30:04 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 1.12 2020/02/14 04:30:04 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->kdev = dev->dev; 907 connector->funcs = funcs; 908 connector->connector_type = connector_type; 909 connector->connector_type_id = 910 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); 911 if (connector->connector_type_id < 0) { 912 ret = connector->connector_type_id; 913 goto out_put; 914 } 915 connector->name = 916 kasprintf(GFP_KERNEL, "%s-%d", 917 drm_connector_enum_list[connector_type].name, 918 connector->connector_type_id); 919 if (!connector->name) { 920 ret = -ENOMEM; 921 goto out_put; 922 } 923 924 INIT_LIST_HEAD(&connector->probed_modes); 925 INIT_LIST_HEAD(&connector->modes); 926 connector->edid_blob_ptr = NULL; 927 connector->status = connector_status_unknown; 928 929 drm_connector_get_cmdline_mode(connector); 930 931 /* We should add connectors at the end to avoid upsetting the connector 932 * index too much. */ 933 list_add_tail(&connector->head, &config->connector_list); 934 config->num_connector++; 935 936 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 937 drm_object_attach_property(&connector->base, 938 config->edid_property, 939 0); 940 941 drm_object_attach_property(&connector->base, 942 config->dpms_property, 0); 943 944 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 945 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); 946 } 947 948 connector->debugfs_entry = NULL; 949 950 out_put: 951 if (ret) 952 drm_mode_object_put(dev, &connector->base); 953 954 out_unlock: 955 drm_modeset_unlock_all(dev); 956 957 return ret; 958 } 959 EXPORT_SYMBOL(drm_connector_init); 960 961 /** 962 * drm_connector_cleanup - cleans up an initialised connector 963 * @connector: connector to cleanup 964 * 965 * Cleans up the connector but doesn't free the object. 966 */ 967 void drm_connector_cleanup(struct drm_connector *connector) 968 { 969 struct drm_device *dev = connector->dev; 970 struct drm_display_mode *mode, *t; 971 972 if (connector->tile_group) { 973 drm_mode_put_tile_group(dev, connector->tile_group); 974 connector->tile_group = NULL; 975 } 976 977 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 978 drm_mode_remove(connector, mode); 979 980 list_for_each_entry_safe(mode, t, &connector->modes, head) 981 drm_mode_remove(connector, mode); 982 983 ida_remove(&drm_connector_enum_list[connector->connector_type].ida, 984 connector->connector_type_id); 985 986 kfree(connector->display_info.bus_formats); 987 drm_mode_object_put(dev, &connector->base); 988 kfree(connector->name); 989 connector->name = NULL; 990 list_del(&connector->head); 991 dev->mode_config.num_connector--; 992 993 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 994 if (connector->state && connector->funcs->atomic_destroy_state) 995 connector->funcs->atomic_destroy_state(connector, 996 connector->state); 997 998 memset(connector, 0, sizeof(*connector)); 999 } 1000 EXPORT_SYMBOL(drm_connector_cleanup); 1001 1002 /** 1003 * drm_connector_index - find the index of a registered connector 1004 * @connector: connector to find index for 1005 * 1006 * Given a registered connector, return the index of that connector within a DRM 1007 * device's list of connectors. 1008 */ 1009 unsigned int drm_connector_index(struct drm_connector *connector) 1010 { 1011 unsigned int index = 0; 1012 struct drm_connector *tmp; 1013 struct drm_mode_config *config = &connector->dev->mode_config; 1014 1015 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 1016 1017 drm_for_each_connector(tmp, connector->dev) { 1018 if (tmp == connector) 1019 return index; 1020 1021 index++; 1022 } 1023 1024 BUG(); 1025 } 1026 EXPORT_SYMBOL(drm_connector_index); 1027 1028 /** 1029 * drm_connector_register - register a connector 1030 * @connector: the connector to register 1031 * 1032 * Register userspace interfaces for a connector 1033 * 1034 * Returns: 1035 * Zero on success, error code on failure. 1036 */ 1037 int drm_connector_register(struct drm_connector *connector) 1038 { 1039 #ifndef __NetBSD__ /* XXX sysfs, debugfs */ 1040 int ret; 1041 #endif 1042 1043 drm_mode_object_register(connector->dev, &connector->base); 1044 1045 #ifndef __NetBSD__ /* XXX sysfs, debugfs */ 1046 ret = drm_sysfs_connector_add(connector); 1047 if (ret) 1048 return ret; 1049 1050 ret = drm_debugfs_connector_add(connector); 1051 if (ret) { 1052 drm_sysfs_connector_remove(connector); 1053 return ret; 1054 } 1055 #endif 1056 1057 return 0; 1058 } 1059 EXPORT_SYMBOL(drm_connector_register); 1060 1061 /** 1062 * drm_connector_unregister - unregister a connector 1063 * @connector: the connector to unregister 1064 * 1065 * Unregister userspace interfaces for a connector 1066 */ 1067 void drm_connector_unregister(struct drm_connector *connector) 1068 { 1069 #ifndef __NetBSD__ /* XXX sysfs, debugfs */ 1070 drm_sysfs_connector_remove(connector); 1071 drm_debugfs_connector_remove(connector); 1072 #endif 1073 } 1074 EXPORT_SYMBOL(drm_connector_unregister); 1075 1076 1077 /** 1078 * drm_connector_unplug_all - unregister connector userspace interfaces 1079 * @dev: drm device 1080 * 1081 * This function unregisters all connector userspace interfaces in sysfs. Should 1082 * be call when the device is disconnected, e.g. from an usb driver's 1083 * ->disconnect callback. 1084 */ 1085 void drm_connector_unplug_all(struct drm_device *dev) 1086 { 1087 struct drm_connector *connector; 1088 1089 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */ 1090 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1091 drm_connector_unregister(connector); 1092 1093 } 1094 EXPORT_SYMBOL(drm_connector_unplug_all); 1095 1096 /** 1097 * drm_encoder_init - Init a preallocated encoder 1098 * @dev: drm device 1099 * @encoder: the encoder to init 1100 * @funcs: callbacks for this encoder 1101 * @encoder_type: user visible type of the encoder 1102 * 1103 * Initialises a preallocated encoder. Encoder should be 1104 * subclassed as part of driver encoder objects. 1105 * 1106 * Returns: 1107 * Zero on success, error code on failure. 1108 */ 1109 int drm_encoder_init(struct drm_device *dev, 1110 struct drm_encoder *encoder, 1111 const struct drm_encoder_funcs *funcs, 1112 int encoder_type) 1113 { 1114 int ret; 1115 1116 drm_modeset_lock_all(dev); 1117 1118 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1119 if (ret) 1120 goto out_unlock; 1121 1122 encoder->dev = dev; 1123 encoder->encoder_type = encoder_type; 1124 encoder->funcs = funcs; 1125 encoder->name = kasprintf(GFP_KERNEL, "%s-%d", 1126 drm_encoder_enum_list[encoder_type].name, 1127 encoder->base.id); 1128 if (!encoder->name) { 1129 ret = -ENOMEM; 1130 goto out_put; 1131 } 1132 1133 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1134 dev->mode_config.num_encoder++; 1135 1136 out_put: 1137 if (ret) 1138 drm_mode_object_put(dev, &encoder->base); 1139 1140 out_unlock: 1141 drm_modeset_unlock_all(dev); 1142 1143 return ret; 1144 } 1145 EXPORT_SYMBOL(drm_encoder_init); 1146 1147 /** 1148 * drm_encoder_cleanup - cleans up an initialised encoder 1149 * @encoder: encoder to cleanup 1150 * 1151 * Cleans up the encoder but doesn't free the object. 1152 */ 1153 void drm_encoder_cleanup(struct drm_encoder *encoder) 1154 { 1155 struct drm_device *dev = encoder->dev; 1156 1157 drm_modeset_lock_all(dev); 1158 drm_mode_object_put(dev, &encoder->base); 1159 kfree(encoder->name); 1160 list_del(&encoder->head); 1161 dev->mode_config.num_encoder--; 1162 drm_modeset_unlock_all(dev); 1163 1164 memset(encoder, 0, sizeof(*encoder)); 1165 } 1166 EXPORT_SYMBOL(drm_encoder_cleanup); 1167 1168 /** 1169 * drm_universal_plane_init - Initialize a new universal plane object 1170 * @dev: DRM device 1171 * @plane: plane object to init 1172 * @possible_crtcs: bitmask of possible CRTCs 1173 * @funcs: callbacks for the new plane 1174 * @formats: array of supported formats (%DRM_FORMAT_*) 1175 * @format_count: number of elements in @formats 1176 * @type: type of plane (overlay, primary, cursor) 1177 * 1178 * Initializes a plane object of type @type. 1179 * 1180 * Returns: 1181 * Zero on success, error code on failure. 1182 */ 1183 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1184 unsigned long possible_crtcs, 1185 const struct drm_plane_funcs *funcs, 1186 const uint32_t *formats, unsigned int format_count, 1187 enum drm_plane_type type) 1188 { 1189 struct drm_mode_config *config = &dev->mode_config; 1190 int ret; 1191 1192 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1193 if (ret) 1194 return ret; 1195 1196 drm_modeset_lock_init(&plane->mutex); 1197 1198 plane->base.properties = &plane->properties; 1199 plane->dev = dev; 1200 plane->funcs = funcs; 1201 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t), 1202 GFP_KERNEL); 1203 if (!plane->format_types) { 1204 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1205 drm_mode_object_put(dev, &plane->base); 1206 return -ENOMEM; 1207 } 1208 1209 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1210 plane->format_count = format_count; 1211 plane->possible_crtcs = possible_crtcs; 1212 plane->type = type; 1213 1214 list_add_tail(&plane->head, &config->plane_list); 1215 config->num_total_plane++; 1216 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1217 config->num_overlay_plane++; 1218 1219 drm_object_attach_property(&plane->base, 1220 config->plane_type_property, 1221 plane->type); 1222 1223 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 1224 drm_object_attach_property(&plane->base, config->prop_fb_id, 0); 1225 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); 1226 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); 1227 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); 1228 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); 1229 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); 1230 drm_object_attach_property(&plane->base, config->prop_src_x, 0); 1231 drm_object_attach_property(&plane->base, config->prop_src_y, 0); 1232 drm_object_attach_property(&plane->base, config->prop_src_w, 0); 1233 drm_object_attach_property(&plane->base, config->prop_src_h, 0); 1234 } 1235 1236 return 0; 1237 } 1238 EXPORT_SYMBOL(drm_universal_plane_init); 1239 1240 /** 1241 * drm_plane_init - Initialize a legacy plane 1242 * @dev: DRM device 1243 * @plane: plane object to init 1244 * @possible_crtcs: bitmask of possible CRTCs 1245 * @funcs: callbacks for the new plane 1246 * @formats: array of supported formats (%DRM_FORMAT_*) 1247 * @format_count: number of elements in @formats 1248 * @is_primary: plane type (primary vs overlay) 1249 * 1250 * Legacy API to initialize a DRM plane. 1251 * 1252 * New drivers should call drm_universal_plane_init() instead. 1253 * 1254 * Returns: 1255 * Zero on success, error code on failure. 1256 */ 1257 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1258 unsigned long possible_crtcs, 1259 const struct drm_plane_funcs *funcs, 1260 const uint32_t *formats, unsigned int format_count, 1261 bool is_primary) 1262 { 1263 enum drm_plane_type type; 1264 1265 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1266 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1267 formats, format_count, type); 1268 } 1269 EXPORT_SYMBOL(drm_plane_init); 1270 1271 /** 1272 * drm_plane_cleanup - Clean up the core plane usage 1273 * @plane: plane to cleanup 1274 * 1275 * This function cleans up @plane and removes it from the DRM mode setting 1276 * core. Note that the function does *not* free the plane structure itself, 1277 * this is the responsibility of the caller. 1278 */ 1279 void drm_plane_cleanup(struct drm_plane *plane) 1280 { 1281 struct drm_device *dev = plane->dev; 1282 1283 drm_modeset_lock_all(dev); 1284 kfree(plane->format_types); 1285 drm_mode_object_put(dev, &plane->base); 1286 1287 BUG_ON(list_empty(&plane->head)); 1288 1289 list_del(&plane->head); 1290 dev->mode_config.num_total_plane--; 1291 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1292 dev->mode_config.num_overlay_plane--; 1293 drm_modeset_unlock_all(dev); 1294 1295 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1296 if (plane->state && plane->funcs->atomic_destroy_state) 1297 plane->funcs->atomic_destroy_state(plane, plane->state); 1298 drm_modeset_lock_fini(&plane->mutex); 1299 1300 memset(plane, 0, sizeof(*plane)); 1301 } 1302 EXPORT_SYMBOL(drm_plane_cleanup); 1303 1304 /** 1305 * drm_plane_index - find the index of a registered plane 1306 * @plane: plane to find index for 1307 * 1308 * Given a registered plane, return the index of that CRTC within a DRM 1309 * device's list of planes. 1310 */ 1311 unsigned int drm_plane_index(struct drm_plane *plane) 1312 { 1313 unsigned int index = 0; 1314 struct drm_plane *tmp; 1315 1316 drm_for_each_plane(tmp, plane->dev) { 1317 if (tmp == plane) 1318 return index; 1319 1320 index++; 1321 } 1322 1323 BUG(); 1324 } 1325 EXPORT_SYMBOL(drm_plane_index); 1326 1327 /** 1328 * drm_plane_from_index - find the registered plane at an index 1329 * @dev: DRM device 1330 * @idx: index of registered plane to find for 1331 * 1332 * Given a plane index, return the registered plane from DRM device's 1333 * list of planes with matching index. 1334 */ 1335 struct drm_plane * 1336 drm_plane_from_index(struct drm_device *dev, int idx) 1337 { 1338 struct drm_plane *plane; 1339 unsigned int i = 0; 1340 1341 drm_for_each_plane(plane, dev) { 1342 if (i == idx) 1343 return plane; 1344 i++; 1345 } 1346 return NULL; 1347 } 1348 EXPORT_SYMBOL(drm_plane_from_index); 1349 1350 /** 1351 * drm_plane_force_disable - Forcibly disable a plane 1352 * @plane: plane to disable 1353 * 1354 * Forces the plane to be disabled. 1355 * 1356 * Used when the plane's current framebuffer is destroyed, 1357 * and when restoring fbdev mode. 1358 */ 1359 void drm_plane_force_disable(struct drm_plane *plane) 1360 { 1361 int ret; 1362 1363 if (!plane->fb) 1364 return; 1365 1366 plane->old_fb = plane->fb; 1367 ret = plane->funcs->disable_plane(plane); 1368 if (ret) { 1369 DRM_ERROR("failed to disable plane with busy fb\n"); 1370 plane->old_fb = NULL; 1371 return; 1372 } 1373 /* disconnect the plane from the fb and crtc: */ 1374 drm_framebuffer_unreference(plane->old_fb); 1375 plane->old_fb = NULL; 1376 plane->fb = NULL; 1377 plane->crtc = NULL; 1378 } 1379 EXPORT_SYMBOL(drm_plane_force_disable); 1380 1381 static int drm_mode_create_standard_properties(struct drm_device *dev) 1382 { 1383 struct drm_property *prop; 1384 1385 /* 1386 * Standard properties (apply to all connectors) 1387 */ 1388 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1389 DRM_MODE_PROP_IMMUTABLE, 1390 "EDID", 0); 1391 if (!prop) 1392 return -ENOMEM; 1393 dev->mode_config.edid_property = prop; 1394 1395 prop = drm_property_create_enum(dev, 0, 1396 "DPMS", drm_dpms_enum_list, 1397 ARRAY_SIZE(drm_dpms_enum_list)); 1398 if (!prop) 1399 return -ENOMEM; 1400 dev->mode_config.dpms_property = prop; 1401 1402 prop = drm_property_create(dev, 1403 DRM_MODE_PROP_BLOB | 1404 DRM_MODE_PROP_IMMUTABLE, 1405 "PATH", 0); 1406 if (!prop) 1407 return -ENOMEM; 1408 dev->mode_config.path_property = prop; 1409 1410 prop = drm_property_create(dev, 1411 DRM_MODE_PROP_BLOB | 1412 DRM_MODE_PROP_IMMUTABLE, 1413 "TILE", 0); 1414 if (!prop) 1415 return -ENOMEM; 1416 dev->mode_config.tile_property = prop; 1417 1418 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1419 "type", drm_plane_type_enum_list, 1420 ARRAY_SIZE(drm_plane_type_enum_list)); 1421 if (!prop) 1422 return -ENOMEM; 1423 dev->mode_config.plane_type_property = prop; 1424 1425 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1426 "SRC_X", 0, UINT_MAX); 1427 if (!prop) 1428 return -ENOMEM; 1429 dev->mode_config.prop_src_x = prop; 1430 1431 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1432 "SRC_Y", 0, UINT_MAX); 1433 if (!prop) 1434 return -ENOMEM; 1435 dev->mode_config.prop_src_y = prop; 1436 1437 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1438 "SRC_W", 0, UINT_MAX); 1439 if (!prop) 1440 return -ENOMEM; 1441 dev->mode_config.prop_src_w = prop; 1442 1443 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1444 "SRC_H", 0, UINT_MAX); 1445 if (!prop) 1446 return -ENOMEM; 1447 dev->mode_config.prop_src_h = prop; 1448 1449 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1450 "CRTC_X", INT_MIN, INT_MAX); 1451 if (!prop) 1452 return -ENOMEM; 1453 dev->mode_config.prop_crtc_x = prop; 1454 1455 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1456 "CRTC_Y", INT_MIN, INT_MAX); 1457 if (!prop) 1458 return -ENOMEM; 1459 dev->mode_config.prop_crtc_y = prop; 1460 1461 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1462 "CRTC_W", 0, INT_MAX); 1463 if (!prop) 1464 return -ENOMEM; 1465 dev->mode_config.prop_crtc_w = prop; 1466 1467 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1468 "CRTC_H", 0, INT_MAX); 1469 if (!prop) 1470 return -ENOMEM; 1471 dev->mode_config.prop_crtc_h = prop; 1472 1473 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1474 "FB_ID", DRM_MODE_OBJECT_FB); 1475 if (!prop) 1476 return -ENOMEM; 1477 dev->mode_config.prop_fb_id = prop; 1478 1479 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1480 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 1481 if (!prop) 1482 return -ENOMEM; 1483 dev->mode_config.prop_crtc_id = prop; 1484 1485 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 1486 "ACTIVE"); 1487 if (!prop) 1488 return -ENOMEM; 1489 dev->mode_config.prop_active = prop; 1490 1491 prop = drm_property_create(dev, 1492 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 1493 "MODE_ID", 0); 1494 if (!prop) 1495 return -ENOMEM; 1496 dev->mode_config.prop_mode_id = prop; 1497 1498 return 0; 1499 } 1500 1501 /** 1502 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1503 * @dev: DRM device 1504 * 1505 * Called by a driver the first time a DVI-I connector is made. 1506 */ 1507 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1508 { 1509 struct drm_property *dvi_i_selector; 1510 struct drm_property *dvi_i_subconnector; 1511 1512 if (dev->mode_config.dvi_i_select_subconnector_property) 1513 return 0; 1514 1515 dvi_i_selector = 1516 drm_property_create_enum(dev, 0, 1517 "select subconnector", 1518 drm_dvi_i_select_enum_list, 1519 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1520 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1521 1522 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1523 "subconnector", 1524 drm_dvi_i_subconnector_enum_list, 1525 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1526 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1527 1528 return 0; 1529 } 1530 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1531 1532 /** 1533 * drm_create_tv_properties - create TV specific connector properties 1534 * @dev: DRM device 1535 * @num_modes: number of different TV formats (modes) supported 1536 * @modes: array of pointers to strings containing name of each format 1537 * 1538 * Called by a driver's TV initialization routine, this function creates 1539 * the TV specific connector properties for a given device. Caller is 1540 * responsible for allocating a list of format names and passing them to 1541 * this routine. 1542 */ 1543 int drm_mode_create_tv_properties(struct drm_device *dev, 1544 unsigned int num_modes, 1545 const char * const modes[]) 1546 { 1547 struct drm_property *tv_selector; 1548 struct drm_property *tv_subconnector; 1549 unsigned int i; 1550 1551 if (dev->mode_config.tv_select_subconnector_property) 1552 return 0; 1553 1554 /* 1555 * Basic connector properties 1556 */ 1557 tv_selector = drm_property_create_enum(dev, 0, 1558 "select subconnector", 1559 drm_tv_select_enum_list, 1560 ARRAY_SIZE(drm_tv_select_enum_list)); 1561 if (!tv_selector) 1562 goto nomem; 1563 1564 dev->mode_config.tv_select_subconnector_property = tv_selector; 1565 1566 tv_subconnector = 1567 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1568 "subconnector", 1569 drm_tv_subconnector_enum_list, 1570 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1571 if (!tv_subconnector) 1572 goto nomem; 1573 dev->mode_config.tv_subconnector_property = tv_subconnector; 1574 1575 /* 1576 * Other, TV specific properties: margins & TV modes. 1577 */ 1578 dev->mode_config.tv_left_margin_property = 1579 drm_property_create_range(dev, 0, "left margin", 0, 100); 1580 if (!dev->mode_config.tv_left_margin_property) 1581 goto nomem; 1582 1583 dev->mode_config.tv_right_margin_property = 1584 drm_property_create_range(dev, 0, "right margin", 0, 100); 1585 if (!dev->mode_config.tv_right_margin_property) 1586 goto nomem; 1587 1588 dev->mode_config.tv_top_margin_property = 1589 drm_property_create_range(dev, 0, "top margin", 0, 100); 1590 if (!dev->mode_config.tv_top_margin_property) 1591 goto nomem; 1592 1593 dev->mode_config.tv_bottom_margin_property = 1594 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1595 if (!dev->mode_config.tv_bottom_margin_property) 1596 goto nomem; 1597 1598 dev->mode_config.tv_mode_property = 1599 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1600 "mode", num_modes); 1601 if (!dev->mode_config.tv_mode_property) 1602 goto nomem; 1603 1604 for (i = 0; i < num_modes; i++) 1605 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1606 i, modes[i]); 1607 1608 dev->mode_config.tv_brightness_property = 1609 drm_property_create_range(dev, 0, "brightness", 0, 100); 1610 if (!dev->mode_config.tv_brightness_property) 1611 goto nomem; 1612 1613 dev->mode_config.tv_contrast_property = 1614 drm_property_create_range(dev, 0, "contrast", 0, 100); 1615 if (!dev->mode_config.tv_contrast_property) 1616 goto nomem; 1617 1618 dev->mode_config.tv_flicker_reduction_property = 1619 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1620 if (!dev->mode_config.tv_flicker_reduction_property) 1621 goto nomem; 1622 1623 dev->mode_config.tv_overscan_property = 1624 drm_property_create_range(dev, 0, "overscan", 0, 100); 1625 if (!dev->mode_config.tv_overscan_property) 1626 goto nomem; 1627 1628 dev->mode_config.tv_saturation_property = 1629 drm_property_create_range(dev, 0, "saturation", 0, 100); 1630 if (!dev->mode_config.tv_saturation_property) 1631 goto nomem; 1632 1633 dev->mode_config.tv_hue_property = 1634 drm_property_create_range(dev, 0, "hue", 0, 100); 1635 if (!dev->mode_config.tv_hue_property) 1636 goto nomem; 1637 1638 return 0; 1639 nomem: 1640 return -ENOMEM; 1641 } 1642 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1643 1644 /** 1645 * drm_mode_create_scaling_mode_property - create scaling mode property 1646 * @dev: DRM device 1647 * 1648 * Called by a driver the first time it's needed, must be attached to desired 1649 * connectors. 1650 */ 1651 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1652 { 1653 struct drm_property *scaling_mode; 1654 1655 if (dev->mode_config.scaling_mode_property) 1656 return 0; 1657 1658 scaling_mode = 1659 drm_property_create_enum(dev, 0, "scaling mode", 1660 drm_scaling_mode_enum_list, 1661 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1662 1663 dev->mode_config.scaling_mode_property = scaling_mode; 1664 1665 return 0; 1666 } 1667 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1668 1669 /** 1670 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1671 * @dev: DRM device 1672 * 1673 * Called by a driver the first time it's needed, must be attached to desired 1674 * connectors. 1675 * 1676 * Returns: 1677 * Zero on success, negative errno on failure. 1678 */ 1679 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1680 { 1681 if (dev->mode_config.aspect_ratio_property) 1682 return 0; 1683 1684 dev->mode_config.aspect_ratio_property = 1685 drm_property_create_enum(dev, 0, "aspect ratio", 1686 drm_aspect_ratio_enum_list, 1687 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1688 1689 if (dev->mode_config.aspect_ratio_property == NULL) 1690 return -ENOMEM; 1691 1692 return 0; 1693 } 1694 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1695 1696 /** 1697 * drm_mode_create_dirty_property - create dirty property 1698 * @dev: DRM device 1699 * 1700 * Called by a driver the first time it's needed, must be attached to desired 1701 * connectors. 1702 */ 1703 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1704 { 1705 struct drm_property *dirty_info; 1706 1707 if (dev->mode_config.dirty_info_property) 1708 return 0; 1709 1710 dirty_info = 1711 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1712 "dirty", 1713 drm_dirty_info_enum_list, 1714 ARRAY_SIZE(drm_dirty_info_enum_list)); 1715 dev->mode_config.dirty_info_property = dirty_info; 1716 1717 return 0; 1718 } 1719 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1720 1721 /** 1722 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1723 * @dev: DRM device 1724 * 1725 * Create the the suggested x/y offset property for connectors. 1726 */ 1727 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1728 { 1729 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1730 return 0; 1731 1732 dev->mode_config.suggested_x_property = 1733 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1734 1735 dev->mode_config.suggested_y_property = 1736 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1737 1738 if (dev->mode_config.suggested_x_property == NULL || 1739 dev->mode_config.suggested_y_property == NULL) 1740 return -ENOMEM; 1741 return 0; 1742 } 1743 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1744 1745 /** 1746 * drm_mode_getresources - get graphics configuration 1747 * @dev: drm device for the ioctl 1748 * @data: data pointer for the ioctl 1749 * @file_priv: drm file for the ioctl call 1750 * 1751 * Construct a set of configuration description structures and return 1752 * them to the user, including CRTC, connector and framebuffer configuration. 1753 * 1754 * Called by the user via ioctl. 1755 * 1756 * Returns: 1757 * Zero on success, negative errno on failure. 1758 */ 1759 int drm_mode_getresources(struct drm_device *dev, void *data, 1760 struct drm_file *file_priv) 1761 { 1762 struct drm_mode_card_res *card_res = data; 1763 struct list_head *lh; 1764 struct drm_framebuffer *fb; 1765 struct drm_connector *connector; 1766 struct drm_crtc *crtc; 1767 struct drm_encoder *encoder; 1768 int ret = 0; 1769 int connector_count = 0; 1770 int crtc_count = 0; 1771 int fb_count = 0; 1772 int encoder_count = 0; 1773 int copied = 0; 1774 uint32_t __user *fb_id; 1775 uint32_t __user *crtc_id; 1776 uint32_t __user *connector_id; 1777 uint32_t __user *encoder_id; 1778 1779 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1780 return -EINVAL; 1781 1782 1783 mutex_lock(&file_priv->fbs_lock); 1784 /* 1785 * For the non-control nodes we need to limit the list of resources 1786 * by IDs in the group list for this node 1787 */ 1788 list_for_each(lh, &file_priv->fbs) 1789 fb_count++; 1790 1791 /* handle this in 4 parts */ 1792 /* FBs */ 1793 if (card_res->count_fbs >= fb_count) { 1794 copied = 0; 1795 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1796 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1797 if (put_user(fb->base.id, fb_id + copied)) { 1798 mutex_unlock(&file_priv->fbs_lock); 1799 return -EFAULT; 1800 } 1801 copied++; 1802 } 1803 } 1804 card_res->count_fbs = fb_count; 1805 mutex_unlock(&file_priv->fbs_lock); 1806 1807 /* mode_config.mutex protects the connector list against e.g. DP MST 1808 * connector hot-adding. CRTC/Plane lists are invariant. */ 1809 mutex_lock(&dev->mode_config.mutex); 1810 drm_for_each_crtc(crtc, dev) 1811 crtc_count++; 1812 1813 drm_for_each_connector(connector, dev) 1814 connector_count++; 1815 1816 drm_for_each_encoder(encoder, dev) 1817 encoder_count++; 1818 1819 card_res->max_height = dev->mode_config.max_height; 1820 card_res->min_height = dev->mode_config.min_height; 1821 card_res->max_width = dev->mode_config.max_width; 1822 card_res->min_width = dev->mode_config.min_width; 1823 1824 /* CRTCs */ 1825 if (card_res->count_crtcs >= crtc_count) { 1826 copied = 0; 1827 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1828 drm_for_each_crtc(crtc, dev) { 1829 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 1830 if (put_user(crtc->base.id, crtc_id + copied)) { 1831 ret = -EFAULT; 1832 goto out; 1833 } 1834 copied++; 1835 } 1836 } 1837 card_res->count_crtcs = crtc_count; 1838 1839 /* Encoders */ 1840 if (card_res->count_encoders >= encoder_count) { 1841 copied = 0; 1842 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1843 drm_for_each_encoder(encoder, dev) { 1844 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1845 encoder->name); 1846 if (put_user(encoder->base.id, encoder_id + 1847 copied)) { 1848 ret = -EFAULT; 1849 goto out; 1850 } 1851 copied++; 1852 } 1853 } 1854 card_res->count_encoders = encoder_count; 1855 1856 /* Connectors */ 1857 if (card_res->count_connectors >= connector_count) { 1858 copied = 0; 1859 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1860 drm_for_each_connector(connector, dev) { 1861 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1862 connector->base.id, 1863 connector->name); 1864 if (put_user(connector->base.id, 1865 connector_id + copied)) { 1866 ret = -EFAULT; 1867 goto out; 1868 } 1869 copied++; 1870 } 1871 } 1872 card_res->count_connectors = connector_count; 1873 1874 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1875 card_res->count_connectors, card_res->count_encoders); 1876 1877 out: 1878 mutex_unlock(&dev->mode_config.mutex); 1879 return ret; 1880 } 1881 1882 /** 1883 * drm_mode_getcrtc - get CRTC configuration 1884 * @dev: drm device for the ioctl 1885 * @data: data pointer for the ioctl 1886 * @file_priv: drm file for the ioctl call 1887 * 1888 * Construct a CRTC configuration structure to return to the user. 1889 * 1890 * Called by the user via ioctl. 1891 * 1892 * Returns: 1893 * Zero on success, negative errno on failure. 1894 */ 1895 int drm_mode_getcrtc(struct drm_device *dev, 1896 void *data, struct drm_file *file_priv) 1897 { 1898 struct drm_mode_crtc *crtc_resp = data; 1899 struct drm_crtc *crtc; 1900 1901 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1902 return -EINVAL; 1903 1904 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 1905 if (!crtc) 1906 return -ENOENT; 1907 1908 drm_modeset_lock_crtc(crtc, crtc->primary); 1909 crtc_resp->gamma_size = crtc->gamma_size; 1910 if (crtc->primary->fb) 1911 crtc_resp->fb_id = crtc->primary->fb->base.id; 1912 else 1913 crtc_resp->fb_id = 0; 1914 1915 if (crtc->state) { 1916 crtc_resp->x = crtc->primary->state->src_x >> 16; 1917 crtc_resp->y = crtc->primary->state->src_y >> 16; 1918 if (crtc->state->enable) { 1919 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); 1920 crtc_resp->mode_valid = 1; 1921 1922 } else { 1923 crtc_resp->mode_valid = 0; 1924 } 1925 } else { 1926 crtc_resp->x = crtc->x; 1927 crtc_resp->y = crtc->y; 1928 if (crtc->enabled) { 1929 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); 1930 crtc_resp->mode_valid = 1; 1931 1932 } else { 1933 crtc_resp->mode_valid = 0; 1934 } 1935 } 1936 drm_modeset_unlock_crtc(crtc); 1937 1938 return 0; 1939 } 1940 1941 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 1942 const struct drm_file *file_priv) 1943 { 1944 /* 1945 * If user-space hasn't configured the driver to expose the stereo 3D 1946 * modes, don't expose them. 1947 */ 1948 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 1949 return false; 1950 1951 return true; 1952 } 1953 1954 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 1955 { 1956 /* For atomic drivers only state objects are synchronously updated and 1957 * protected by modeset locks, so check those first. */ 1958 if (connector->state) 1959 return connector->state->best_encoder; 1960 return connector->encoder; 1961 } 1962 1963 /* helper for getconnector and getproperties ioctls */ 1964 static int get_properties(struct drm_mode_object *obj, bool atomic, 1965 uint32_t __user *prop_ptr, uint64_t __user *prop_values, 1966 uint32_t *arg_count_props) 1967 { 1968 int props_count; 1969 int i, ret, copied; 1970 1971 props_count = obj->properties->count; 1972 if (!atomic) 1973 props_count -= obj->properties->atomic_count; 1974 1975 if ((*arg_count_props >= props_count) && props_count) { 1976 for (i = 0, copied = 0; copied < props_count; i++) { 1977 struct drm_property *prop = obj->properties->properties[i]; 1978 uint64_t val; 1979 1980 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) 1981 continue; 1982 1983 ret = drm_object_property_get_value(obj, prop, &val); 1984 if (ret) 1985 return ret; 1986 1987 if (put_user(prop->base.id, prop_ptr + copied)) 1988 return -EFAULT; 1989 1990 if (put_user(val, prop_values + copied)) 1991 return -EFAULT; 1992 1993 copied++; 1994 } 1995 } 1996 *arg_count_props = props_count; 1997 1998 return 0; 1999 } 2000 2001 /** 2002 * drm_mode_getconnector - get connector configuration 2003 * @dev: drm device for the ioctl 2004 * @data: data pointer for the ioctl 2005 * @file_priv: drm file for the ioctl call 2006 * 2007 * Construct a connector configuration structure to return to the user. 2008 * 2009 * Called by the user via ioctl. 2010 * 2011 * Returns: 2012 * Zero on success, negative errno on failure. 2013 */ 2014 int drm_mode_getconnector(struct drm_device *dev, void *data, 2015 struct drm_file *file_priv) 2016 { 2017 struct drm_mode_get_connector *out_resp = data; 2018 struct drm_connector *connector; 2019 struct drm_encoder *encoder; 2020 struct drm_display_mode *mode; 2021 int mode_count = 0; 2022 int encoders_count = 0; 2023 int ret = 0; 2024 int copied = 0; 2025 int i; 2026 struct drm_mode_modeinfo u_mode; 2027 struct drm_mode_modeinfo __user *mode_ptr; 2028 uint32_t __user *encoder_ptr; 2029 2030 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2031 return -EINVAL; 2032 2033 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2034 2035 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 2036 2037 mutex_lock(&dev->mode_config.mutex); 2038 2039 connector = drm_connector_find(dev, out_resp->connector_id); 2040 if (!connector) { 2041 ret = -ENOENT; 2042 goto out_unlock; 2043 } 2044 2045 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) 2046 if (connector->encoder_ids[i] != 0) 2047 encoders_count++; 2048 2049 if (out_resp->count_modes == 0) { 2050 connector->funcs->fill_modes(connector, 2051 dev->mode_config.max_width, 2052 dev->mode_config.max_height); 2053 } 2054 2055 /* delayed so we get modes regardless of pre-fill_modes state */ 2056 list_for_each_entry(mode, &connector->modes, head) 2057 if (drm_mode_expose_to_userspace(mode, file_priv)) 2058 mode_count++; 2059 2060 out_resp->connector_id = connector->base.id; 2061 out_resp->connector_type = connector->connector_type; 2062 out_resp->connector_type_id = connector->connector_type_id; 2063 out_resp->mm_width = connector->display_info.width_mm; 2064 out_resp->mm_height = connector->display_info.height_mm; 2065 out_resp->subpixel = connector->display_info.subpixel_order; 2066 out_resp->connection = connector->status; 2067 2068 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2069 encoder = drm_connector_get_encoder(connector); 2070 if (encoder) 2071 out_resp->encoder_id = encoder->base.id; 2072 else 2073 out_resp->encoder_id = 0; 2074 2075 /* 2076 * This ioctl is called twice, once to determine how much space is 2077 * needed, and the 2nd time to fill it. 2078 */ 2079 if ((out_resp->count_modes >= mode_count) && mode_count) { 2080 copied = 0; 2081 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2082 list_for_each_entry(mode, &connector->modes, head) { 2083 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2084 continue; 2085 2086 drm_mode_convert_to_umode(&u_mode, mode); 2087 if (copy_to_user(mode_ptr + copied, 2088 &u_mode, sizeof(u_mode))) { 2089 ret = -EFAULT; 2090 goto out; 2091 } 2092 copied++; 2093 } 2094 } 2095 out_resp->count_modes = mode_count; 2096 2097 ret = get_properties(&connector->base, file_priv->atomic, 2098 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2099 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2100 &out_resp->count_props); 2101 if (ret) 2102 goto out; 2103 2104 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2105 copied = 0; 2106 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2107 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2108 if (connector->encoder_ids[i] != 0) { 2109 if (put_user(connector->encoder_ids[i], 2110 encoder_ptr + copied)) { 2111 ret = -EFAULT; 2112 goto out; 2113 } 2114 copied++; 2115 } 2116 } 2117 } 2118 out_resp->count_encoders = encoders_count; 2119 2120 out: 2121 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2122 2123 out_unlock: 2124 mutex_unlock(&dev->mode_config.mutex); 2125 2126 return ret; 2127 } 2128 2129 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2130 { 2131 struct drm_connector *connector; 2132 struct drm_device *dev = encoder->dev; 2133 bool uses_atomic = false; 2134 2135 /* For atomic drivers only state objects are synchronously updated and 2136 * protected by modeset locks, so check those first. */ 2137 drm_for_each_connector(connector, dev) { 2138 if (!connector->state) 2139 continue; 2140 2141 uses_atomic = true; 2142 2143 if (connector->state->best_encoder != encoder) 2144 continue; 2145 2146 return connector->state->crtc; 2147 } 2148 2149 /* Don't return stale data (e.g. pending async disable). */ 2150 if (uses_atomic) 2151 return NULL; 2152 2153 return encoder->crtc; 2154 } 2155 2156 /** 2157 * drm_mode_getencoder - get encoder configuration 2158 * @dev: drm device for the ioctl 2159 * @data: data pointer for the ioctl 2160 * @file_priv: drm file for the ioctl call 2161 * 2162 * Construct a encoder configuration structure to return to the user. 2163 * 2164 * Called by the user via ioctl. 2165 * 2166 * Returns: 2167 * Zero on success, negative errno on failure. 2168 */ 2169 int drm_mode_getencoder(struct drm_device *dev, void *data, 2170 struct drm_file *file_priv) 2171 { 2172 struct drm_mode_get_encoder *enc_resp = data; 2173 struct drm_encoder *encoder; 2174 struct drm_crtc *crtc; 2175 2176 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2177 return -EINVAL; 2178 2179 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2180 if (!encoder) 2181 return -ENOENT; 2182 2183 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2184 crtc = drm_encoder_get_crtc(encoder); 2185 if (crtc) 2186 enc_resp->crtc_id = crtc->base.id; 2187 else 2188 enc_resp->crtc_id = 0; 2189 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2190 2191 enc_resp->encoder_type = encoder->encoder_type; 2192 enc_resp->encoder_id = encoder->base.id; 2193 enc_resp->possible_crtcs = encoder->possible_crtcs; 2194 enc_resp->possible_clones = encoder->possible_clones; 2195 2196 return 0; 2197 } 2198 2199 /** 2200 * drm_mode_getplane_res - enumerate all plane resources 2201 * @dev: DRM device 2202 * @data: ioctl data 2203 * @file_priv: DRM file info 2204 * 2205 * Construct a list of plane ids to return to the user. 2206 * 2207 * Called by the user via ioctl. 2208 * 2209 * Returns: 2210 * Zero on success, negative errno on failure. 2211 */ 2212 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2213 struct drm_file *file_priv) 2214 { 2215 struct drm_mode_get_plane_res *plane_resp = data; 2216 struct drm_mode_config *config; 2217 struct drm_plane *plane; 2218 uint32_t __user *plane_ptr; 2219 int copied = 0; 2220 unsigned num_planes; 2221 2222 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2223 return -EINVAL; 2224 2225 config = &dev->mode_config; 2226 2227 if (file_priv->universal_planes) 2228 num_planes = config->num_total_plane; 2229 else 2230 num_planes = config->num_overlay_plane; 2231 2232 /* 2233 * This ioctl is called twice, once to determine how much space is 2234 * needed, and the 2nd time to fill it. 2235 */ 2236 if (num_planes && 2237 (plane_resp->count_planes >= num_planes)) { 2238 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2239 2240 /* Plane lists are invariant, no locking needed. */ 2241 drm_for_each_plane(plane, dev) { 2242 /* 2243 * Unless userspace set the 'universal planes' 2244 * capability bit, only advertise overlays. 2245 */ 2246 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2247 !file_priv->universal_planes) 2248 continue; 2249 2250 if (put_user(plane->base.id, plane_ptr + copied)) 2251 return -EFAULT; 2252 copied++; 2253 } 2254 } 2255 plane_resp->count_planes = num_planes; 2256 2257 return 0; 2258 } 2259 2260 /** 2261 * drm_mode_getplane - get plane configuration 2262 * @dev: DRM device 2263 * @data: ioctl data 2264 * @file_priv: DRM file info 2265 * 2266 * Construct a plane configuration structure to return to the user. 2267 * 2268 * Called by the user via ioctl. 2269 * 2270 * Returns: 2271 * Zero on success, negative errno on failure. 2272 */ 2273 int drm_mode_getplane(struct drm_device *dev, void *data, 2274 struct drm_file *file_priv) 2275 { 2276 struct drm_mode_get_plane *plane_resp = data; 2277 struct drm_plane *plane; 2278 uint32_t __user *format_ptr; 2279 2280 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2281 return -EINVAL; 2282 2283 plane = drm_plane_find(dev, plane_resp->plane_id); 2284 if (!plane) 2285 return -ENOENT; 2286 2287 drm_modeset_lock(&plane->mutex, NULL); 2288 if (plane->crtc) 2289 plane_resp->crtc_id = plane->crtc->base.id; 2290 else 2291 plane_resp->crtc_id = 0; 2292 2293 if (plane->fb) 2294 plane_resp->fb_id = plane->fb->base.id; 2295 else 2296 plane_resp->fb_id = 0; 2297 drm_modeset_unlock(&plane->mutex); 2298 2299 plane_resp->plane_id = plane->base.id; 2300 plane_resp->possible_crtcs = plane->possible_crtcs; 2301 plane_resp->gamma_size = 0; 2302 2303 /* 2304 * This ioctl is called twice, once to determine how much space is 2305 * needed, and the 2nd time to fill it. 2306 */ 2307 if (plane->format_count && 2308 (plane_resp->count_format_types >= plane->format_count)) { 2309 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2310 if (copy_to_user(format_ptr, 2311 plane->format_types, 2312 sizeof(uint32_t) * plane->format_count)) { 2313 return -EFAULT; 2314 } 2315 } 2316 plane_resp->count_format_types = plane->format_count; 2317 2318 return 0; 2319 } 2320 2321 /** 2322 * drm_plane_check_pixel_format - Check if the plane supports the pixel format 2323 * @plane: plane to check for format support 2324 * @format: the pixel format 2325 * 2326 * Returns: 2327 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL 2328 * otherwise. 2329 */ 2330 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format) 2331 { 2332 unsigned int i; 2333 2334 for (i = 0; i < plane->format_count; i++) { 2335 if (format == plane->format_types[i]) 2336 return 0; 2337 } 2338 2339 return -EINVAL; 2340 } 2341 2342 static int check_src_coords(uint32_t src_x, uint32_t src_y, 2343 uint32_t src_w, uint32_t src_h, 2344 const struct drm_framebuffer *fb) 2345 { 2346 unsigned int fb_width, fb_height; 2347 2348 fb_width = fb->width << 16; 2349 fb_height = fb->height << 16; 2350 2351 /* Make sure source coordinates are inside the fb. */ 2352 if (src_w > fb_width || 2353 src_x > fb_width - src_w || 2354 src_h > fb_height || 2355 src_y > fb_height - src_h) { 2356 DRM_DEBUG_KMS("Invalid source coordinates " 2357 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2358 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2359 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2360 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2361 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2362 return -ENOSPC; 2363 } 2364 2365 return 0; 2366 } 2367 2368 /* 2369 * setplane_internal - setplane handler for internal callers 2370 * 2371 * Note that we assume an extra reference has already been taken on fb. If the 2372 * update fails, this reference will be dropped before return; if it succeeds, 2373 * the previous framebuffer (if any) will be unreferenced instead. 2374 * 2375 * src_{x,y,w,h} are provided in 16.16 fixed point format 2376 */ 2377 static int __setplane_internal(struct drm_plane *plane, 2378 struct drm_crtc *crtc, 2379 struct drm_framebuffer *fb, 2380 int32_t crtc_x, int32_t crtc_y, 2381 uint32_t crtc_w, uint32_t crtc_h, 2382 /* src_{x,y,w,h} values are 16.16 fixed point */ 2383 uint32_t src_x, uint32_t src_y, 2384 uint32_t src_w, uint32_t src_h) 2385 { 2386 int ret = 0; 2387 2388 /* No fb means shut it down */ 2389 if (!fb) { 2390 plane->old_fb = plane->fb; 2391 ret = plane->funcs->disable_plane(plane); 2392 if (!ret) { 2393 plane->crtc = NULL; 2394 plane->fb = NULL; 2395 } else { 2396 plane->old_fb = NULL; 2397 } 2398 goto out; 2399 } 2400 2401 /* Check whether this plane is usable on this CRTC */ 2402 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2403 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2404 ret = -EINVAL; 2405 goto out; 2406 } 2407 2408 /* Check whether this plane supports the fb pixel format. */ 2409 ret = drm_plane_check_pixel_format(plane, fb->pixel_format); 2410 if (ret) { 2411 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2412 drm_get_format_name(fb->pixel_format)); 2413 goto out; 2414 } 2415 2416 /* Give drivers some help against integer overflows */ 2417 if (crtc_w > INT_MAX || 2418 crtc_x > INT_MAX - (int32_t) crtc_w || 2419 crtc_h > INT_MAX || 2420 crtc_y > INT_MAX - (int32_t) crtc_h) { 2421 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2422 crtc_w, crtc_h, crtc_x, crtc_y); 2423 ret = -ERANGE; 2424 goto out; 2425 } 2426 2427 ret = check_src_coords(src_x, src_y, src_w, src_h, fb); 2428 if (ret) 2429 goto out; 2430 2431 plane->old_fb = plane->fb; 2432 ret = plane->funcs->update_plane(plane, crtc, fb, 2433 crtc_x, crtc_y, crtc_w, crtc_h, 2434 src_x, src_y, src_w, src_h); 2435 if (!ret) { 2436 plane->crtc = crtc; 2437 plane->fb = fb; 2438 fb = NULL; 2439 } else { 2440 plane->old_fb = NULL; 2441 } 2442 2443 out: 2444 if (fb) 2445 drm_framebuffer_unreference(fb); 2446 if (plane->old_fb) 2447 drm_framebuffer_unreference(plane->old_fb); 2448 plane->old_fb = NULL; 2449 2450 return ret; 2451 } 2452 2453 static int setplane_internal(struct drm_plane *plane, 2454 struct drm_crtc *crtc, 2455 struct drm_framebuffer *fb, 2456 int32_t crtc_x, int32_t crtc_y, 2457 uint32_t crtc_w, uint32_t crtc_h, 2458 /* src_{x,y,w,h} values are 16.16 fixed point */ 2459 uint32_t src_x, uint32_t src_y, 2460 uint32_t src_w, uint32_t src_h) 2461 { 2462 int ret; 2463 2464 drm_modeset_lock_all(plane->dev); 2465 ret = __setplane_internal(plane, crtc, fb, 2466 crtc_x, crtc_y, crtc_w, crtc_h, 2467 src_x, src_y, src_w, src_h); 2468 drm_modeset_unlock_all(plane->dev); 2469 2470 return ret; 2471 } 2472 2473 /** 2474 * drm_mode_setplane - configure a plane's configuration 2475 * @dev: DRM device 2476 * @data: ioctl data* 2477 * @file_priv: DRM file info 2478 * 2479 * Set plane configuration, including placement, fb, scaling, and other factors. 2480 * Or pass a NULL fb to disable (planes may be disabled without providing a 2481 * valid crtc). 2482 * 2483 * Returns: 2484 * Zero on success, negative errno on failure. 2485 */ 2486 int drm_mode_setplane(struct drm_device *dev, void *data, 2487 struct drm_file *file_priv) 2488 { 2489 struct drm_mode_set_plane *plane_req = data; 2490 struct drm_plane *plane; 2491 struct drm_crtc *crtc = NULL; 2492 struct drm_framebuffer *fb = NULL; 2493 2494 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2495 return -EINVAL; 2496 2497 /* 2498 * First, find the plane, crtc, and fb objects. If not available, 2499 * we don't bother to call the driver. 2500 */ 2501 plane = drm_plane_find(dev, plane_req->plane_id); 2502 if (!plane) { 2503 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2504 plane_req->plane_id); 2505 return -ENOENT; 2506 } 2507 2508 if (plane_req->fb_id) { 2509 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2510 if (!fb) { 2511 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2512 plane_req->fb_id); 2513 return -ENOENT; 2514 } 2515 2516 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2517 if (!crtc) { 2518 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2519 plane_req->crtc_id); 2520 return -ENOENT; 2521 } 2522 } 2523 2524 /* 2525 * setplane_internal will take care of deref'ing either the old or new 2526 * framebuffer depending on success. 2527 */ 2528 return setplane_internal(plane, crtc, fb, 2529 plane_req->crtc_x, plane_req->crtc_y, 2530 plane_req->crtc_w, plane_req->crtc_h, 2531 plane_req->src_x, plane_req->src_y, 2532 plane_req->src_w, plane_req->src_h); 2533 } 2534 2535 /** 2536 * drm_mode_set_config_internal - helper to call ->set_config 2537 * @set: modeset config to set 2538 * 2539 * This is a little helper to wrap internal calls to the ->set_config driver 2540 * interface. The only thing it adds is correct refcounting dance. 2541 * 2542 * Returns: 2543 * Zero on success, negative errno on failure. 2544 */ 2545 int drm_mode_set_config_internal(struct drm_mode_set *set) 2546 { 2547 struct drm_crtc *crtc = set->crtc; 2548 struct drm_framebuffer *fb; 2549 struct drm_crtc *tmp; 2550 int ret; 2551 2552 /* 2553 * NOTE: ->set_config can also disable other crtcs (if we steal all 2554 * connectors from it), hence we need to refcount the fbs across all 2555 * crtcs. Atomic modeset will have saner semantics ... 2556 */ 2557 drm_for_each_crtc(tmp, crtc->dev) 2558 tmp->primary->old_fb = tmp->primary->fb; 2559 2560 fb = set->fb; 2561 2562 ret = crtc->funcs->set_config(set); 2563 if (ret == 0) { 2564 crtc->primary->crtc = crtc; 2565 crtc->primary->fb = fb; 2566 } 2567 2568 drm_for_each_crtc(tmp, crtc->dev) { 2569 if (tmp->primary->fb) 2570 drm_framebuffer_reference(tmp->primary->fb); 2571 if (tmp->primary->old_fb) 2572 drm_framebuffer_unreference(tmp->primary->old_fb); 2573 tmp->primary->old_fb = NULL; 2574 } 2575 2576 return ret; 2577 } 2578 EXPORT_SYMBOL(drm_mode_set_config_internal); 2579 2580 /** 2581 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode 2582 * @mode: mode to query 2583 * @hdisplay: hdisplay value to fill in 2584 * @vdisplay: vdisplay value to fill in 2585 * 2586 * The vdisplay value will be doubled if the specified mode is a stereo mode of 2587 * the appropriate layout. 2588 */ 2589 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, 2590 int *hdisplay, int *vdisplay) 2591 { 2592 struct drm_display_mode adjusted; 2593 2594 drm_mode_copy(&adjusted, mode); 2595 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 2596 *hdisplay = adjusted.crtc_hdisplay; 2597 *vdisplay = adjusted.crtc_vdisplay; 2598 } 2599 EXPORT_SYMBOL(drm_crtc_get_hv_timing); 2600 2601 /** 2602 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2603 * CRTC viewport 2604 * @crtc: CRTC that framebuffer will be displayed on 2605 * @x: x panning 2606 * @y: y panning 2607 * @mode: mode that framebuffer will be displayed under 2608 * @fb: framebuffer to check size of 2609 */ 2610 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2611 int x, int y, 2612 const struct drm_display_mode *mode, 2613 const struct drm_framebuffer *fb) 2614 2615 { 2616 int hdisplay, vdisplay; 2617 2618 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); 2619 2620 if (crtc->state && 2621 crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) | 2622 BIT(DRM_ROTATE_270))) 2623 swap(hdisplay, vdisplay); 2624 2625 return check_src_coords(x << 16, y << 16, 2626 hdisplay << 16, vdisplay << 16, fb); 2627 } 2628 EXPORT_SYMBOL(drm_crtc_check_viewport); 2629 2630 /** 2631 * drm_mode_setcrtc - set CRTC configuration 2632 * @dev: drm device for the ioctl 2633 * @data: data pointer for the ioctl 2634 * @file_priv: drm file for the ioctl call 2635 * 2636 * Build a new CRTC configuration based on user request. 2637 * 2638 * Called by the user via ioctl. 2639 * 2640 * Returns: 2641 * Zero on success, negative errno on failure. 2642 */ 2643 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2644 struct drm_file *file_priv) 2645 { 2646 struct drm_mode_config *config = &dev->mode_config; 2647 struct drm_mode_crtc *crtc_req = data; 2648 struct drm_crtc *crtc; 2649 struct drm_connector **connector_set = NULL, *connector; 2650 struct drm_framebuffer *fb = NULL; 2651 struct drm_display_mode *mode = NULL; 2652 struct drm_mode_set set; 2653 uint32_t __user *set_connectors_ptr; 2654 int ret; 2655 int i; 2656 2657 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2658 return -EINVAL; 2659 2660 /* 2661 * Universal plane src offsets are only 16.16, prevent havoc for 2662 * drivers using universal plane code internally. 2663 */ 2664 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) 2665 return -ERANGE; 2666 2667 drm_modeset_lock_all(dev); 2668 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2669 if (!crtc) { 2670 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2671 ret = -ENOENT; 2672 goto out; 2673 } 2674 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 2675 2676 if (crtc_req->mode_valid) { 2677 /* If we have a mode we need a framebuffer. */ 2678 /* If we pass -1, set the mode with the currently bound fb */ 2679 if (crtc_req->fb_id == -1) { 2680 if (!crtc->primary->fb) { 2681 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2682 ret = -EINVAL; 2683 goto out; 2684 } 2685 fb = crtc->primary->fb; 2686 /* Make refcounting symmetric with the lookup path. */ 2687 drm_framebuffer_reference(fb); 2688 } else { 2689 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2690 if (!fb) { 2691 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2692 crtc_req->fb_id); 2693 ret = -ENOENT; 2694 goto out; 2695 } 2696 } 2697 2698 mode = drm_mode_create(dev); 2699 if (!mode) { 2700 ret = -ENOMEM; 2701 goto out; 2702 } 2703 2704 ret = drm_mode_convert_umode(mode, &crtc_req->mode); 2705 if (ret) { 2706 DRM_DEBUG_KMS("Invalid mode\n"); 2707 goto out; 2708 } 2709 2710 /* 2711 * Check whether the primary plane supports the fb pixel format. 2712 * Drivers not implementing the universal planes API use a 2713 * default formats list provided by the DRM core which doesn't 2714 * match real hardware capabilities. Skip the check in that 2715 * case. 2716 */ 2717 if (!crtc->primary->format_default) { 2718 ret = drm_plane_check_pixel_format(crtc->primary, 2719 fb->pixel_format); 2720 if (ret) { 2721 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2722 drm_get_format_name(fb->pixel_format)); 2723 goto out; 2724 } 2725 } 2726 2727 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2728 mode, fb); 2729 if (ret) 2730 goto out; 2731 2732 } 2733 2734 if (crtc_req->count_connectors == 0 && mode) { 2735 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2736 ret = -EINVAL; 2737 goto out; 2738 } 2739 2740 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2741 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2742 crtc_req->count_connectors); 2743 ret = -EINVAL; 2744 goto out; 2745 } 2746 2747 if (crtc_req->count_connectors > 0) { 2748 u32 out_id; 2749 2750 /* Avoid unbounded kernel memory allocation */ 2751 if (crtc_req->count_connectors > config->num_connector) { 2752 ret = -EINVAL; 2753 goto out; 2754 } 2755 2756 connector_set = kmalloc_array(crtc_req->count_connectors, 2757 sizeof(struct drm_connector *), 2758 GFP_KERNEL); 2759 if (!connector_set) { 2760 ret = -ENOMEM; 2761 goto out; 2762 } 2763 2764 for (i = 0; i < crtc_req->count_connectors; i++) { 2765 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2766 if (get_user(out_id, &set_connectors_ptr[i])) { 2767 ret = -EFAULT; 2768 goto out; 2769 } 2770 2771 connector = drm_connector_find(dev, out_id); 2772 if (!connector) { 2773 DRM_DEBUG_KMS("Connector id %d unknown\n", 2774 out_id); 2775 ret = -ENOENT; 2776 goto out; 2777 } 2778 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2779 connector->base.id, 2780 connector->name); 2781 2782 connector_set[i] = connector; 2783 } 2784 } 2785 2786 set.crtc = crtc; 2787 set.x = crtc_req->x; 2788 set.y = crtc_req->y; 2789 set.mode = mode; 2790 set.connectors = connector_set; 2791 set.num_connectors = crtc_req->count_connectors; 2792 set.fb = fb; 2793 ret = drm_mode_set_config_internal(&set); 2794 2795 out: 2796 if (fb) 2797 drm_framebuffer_unreference(fb); 2798 2799 kfree(connector_set); 2800 drm_mode_destroy(dev, mode); 2801 drm_modeset_unlock_all(dev); 2802 return ret; 2803 } 2804 2805 /** 2806 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2807 * universal plane handler call 2808 * @crtc: crtc to update cursor for 2809 * @req: data pointer for the ioctl 2810 * @file_priv: drm file for the ioctl call 2811 * 2812 * Legacy cursor ioctl's work directly with driver buffer handles. To 2813 * translate legacy ioctl calls into universal plane handler calls, we need to 2814 * wrap the native buffer handle in a drm_framebuffer. 2815 * 2816 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2817 * buffer with a pitch of 4*width; the universal plane interface should be used 2818 * directly in cases where the hardware can support other buffer settings and 2819 * userspace wants to make use of these capabilities. 2820 * 2821 * Returns: 2822 * Zero on success, negative errno on failure. 2823 */ 2824 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2825 struct drm_mode_cursor2 *req, 2826 struct drm_file *file_priv) 2827 { 2828 struct drm_device *dev = crtc->dev; 2829 struct drm_framebuffer *fb = NULL; 2830 struct drm_mode_fb_cmd2 fbreq = { 2831 .width = req->width, 2832 .height = req->height, 2833 .pixel_format = DRM_FORMAT_ARGB8888, 2834 .pitches = { req->width * 4 }, 2835 .handles = { req->handle }, 2836 }; 2837 int32_t crtc_x, crtc_y; 2838 uint32_t crtc_w = 0, crtc_h = 0; 2839 uint32_t src_w = 0, src_h = 0; 2840 int ret = 0; 2841 2842 BUG_ON(!crtc->cursor); 2843 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2844 2845 /* 2846 * Obtain fb we'll be using (either new or existing) and take an extra 2847 * reference to it if fb != null. setplane will take care of dropping 2848 * the reference if the plane update fails. 2849 */ 2850 if (req->flags & DRM_MODE_CURSOR_BO) { 2851 if (req->handle) { 2852 fb = internal_framebuffer_create(dev, &fbreq, file_priv); 2853 if (IS_ERR(fb)) { 2854 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2855 return PTR_ERR(fb); 2856 } 2857 } else { 2858 fb = NULL; 2859 } 2860 } else { 2861 fb = crtc->cursor->fb; 2862 if (fb) 2863 drm_framebuffer_reference(fb); 2864 } 2865 2866 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2867 crtc_x = req->x; 2868 crtc_y = req->y; 2869 } else { 2870 crtc_x = crtc->cursor_x; 2871 crtc_y = crtc->cursor_y; 2872 } 2873 2874 if (fb) { 2875 crtc_w = fb->width; 2876 crtc_h = fb->height; 2877 src_w = fb->width << 16; 2878 src_h = fb->height << 16; 2879 } 2880 2881 /* 2882 * setplane_internal will take care of deref'ing either the old or new 2883 * framebuffer depending on success. 2884 */ 2885 ret = __setplane_internal(crtc->cursor, crtc, fb, 2886 crtc_x, crtc_y, crtc_w, crtc_h, 2887 0, 0, src_w, src_h); 2888 2889 /* Update successful; save new cursor position, if necessary */ 2890 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2891 crtc->cursor_x = req->x; 2892 crtc->cursor_y = req->y; 2893 } 2894 2895 return ret; 2896 } 2897 2898 static int drm_mode_cursor_common(struct drm_device *dev, 2899 struct drm_mode_cursor2 *req, 2900 struct drm_file *file_priv) 2901 { 2902 struct drm_crtc *crtc; 2903 int ret = 0; 2904 2905 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2906 return -EINVAL; 2907 2908 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 2909 return -EINVAL; 2910 2911 crtc = drm_crtc_find(dev, req->crtc_id); 2912 if (!crtc) { 2913 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 2914 return -ENOENT; 2915 } 2916 2917 /* 2918 * If this crtc has a universal cursor plane, call that plane's update 2919 * handler rather than using legacy cursor handlers. 2920 */ 2921 drm_modeset_lock_crtc(crtc, crtc->cursor); 2922 if (crtc->cursor) { 2923 ret = drm_mode_cursor_universal(crtc, req, file_priv); 2924 goto out; 2925 } 2926 2927 if (req->flags & DRM_MODE_CURSOR_BO) { 2928 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 2929 ret = -ENXIO; 2930 goto out; 2931 } 2932 /* Turns off the cursor if handle is 0 */ 2933 if (crtc->funcs->cursor_set2) 2934 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 2935 req->width, req->height, req->hot_x, req->hot_y); 2936 else 2937 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 2938 req->width, req->height); 2939 } 2940 2941 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2942 if (crtc->funcs->cursor_move) { 2943 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 2944 } else { 2945 ret = -EFAULT; 2946 goto out; 2947 } 2948 } 2949 out: 2950 drm_modeset_unlock_crtc(crtc); 2951 2952 return ret; 2953 2954 } 2955 2956 2957 /** 2958 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 2959 * @dev: drm device for the ioctl 2960 * @data: data pointer for the ioctl 2961 * @file_priv: drm file for the ioctl call 2962 * 2963 * Set the cursor configuration based on user request. 2964 * 2965 * Called by the user via ioctl. 2966 * 2967 * Returns: 2968 * Zero on success, negative errno on failure. 2969 */ 2970 int drm_mode_cursor_ioctl(struct drm_device *dev, 2971 void *data, struct drm_file *file_priv) 2972 { 2973 struct drm_mode_cursor *req = data; 2974 struct drm_mode_cursor2 new_req; 2975 2976 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 2977 new_req.hot_x = new_req.hot_y = 0; 2978 2979 return drm_mode_cursor_common(dev, &new_req, file_priv); 2980 } 2981 2982 /** 2983 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 2984 * @dev: drm device for the ioctl 2985 * @data: data pointer for the ioctl 2986 * @file_priv: drm file for the ioctl call 2987 * 2988 * Set the cursor configuration based on user request. This implements the 2nd 2989 * version of the cursor ioctl, which allows userspace to additionally specify 2990 * the hotspot of the pointer. 2991 * 2992 * Called by the user via ioctl. 2993 * 2994 * Returns: 2995 * Zero on success, negative errno on failure. 2996 */ 2997 int drm_mode_cursor2_ioctl(struct drm_device *dev, 2998 void *data, struct drm_file *file_priv) 2999 { 3000 struct drm_mode_cursor2 *req = data; 3001 3002 return drm_mode_cursor_common(dev, req, file_priv); 3003 } 3004 3005 /** 3006 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 3007 * @bpp: bits per pixels 3008 * @depth: bit depth per pixel 3009 * 3010 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 3011 * Useful in fbdev emulation code, since that deals in those values. 3012 */ 3013 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 3014 { 3015 uint32_t fmt; 3016 3017 switch (bpp) { 3018 case 8: 3019 fmt = DRM_FORMAT_C8; 3020 break; 3021 case 16: 3022 if (depth == 15) 3023 fmt = DRM_FORMAT_XRGB1555; 3024 else 3025 fmt = DRM_FORMAT_RGB565; 3026 break; 3027 case 24: 3028 fmt = DRM_FORMAT_RGB888; 3029 break; 3030 case 32: 3031 if (depth == 24) 3032 fmt = DRM_FORMAT_XRGB8888; 3033 else if (depth == 30) 3034 fmt = DRM_FORMAT_XRGB2101010; 3035 else 3036 fmt = DRM_FORMAT_ARGB8888; 3037 break; 3038 default: 3039 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3040 fmt = DRM_FORMAT_XRGB8888; 3041 break; 3042 } 3043 3044 return fmt; 3045 } 3046 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3047 3048 /** 3049 * drm_mode_addfb - add an FB to the graphics configuration 3050 * @dev: drm device for the ioctl 3051 * @data: data pointer for the ioctl 3052 * @file_priv: drm file for the ioctl call 3053 * 3054 * Add a new FB to the specified CRTC, given a user request. This is the 3055 * original addfb ioctl which only supported RGB formats. 3056 * 3057 * Called by the user via ioctl. 3058 * 3059 * Returns: 3060 * Zero on success, negative errno on failure. 3061 */ 3062 int drm_mode_addfb(struct drm_device *dev, 3063 void *data, struct drm_file *file_priv) 3064 { 3065 struct drm_mode_fb_cmd *or = data; 3066 static const struct drm_mode_fb_cmd2 zero_fbcmd; 3067 struct drm_mode_fb_cmd2 r = zero_fbcmd; 3068 int ret; 3069 3070 /* convert to new format and call new ioctl */ 3071 r.fb_id = or->fb_id; 3072 r.width = or->width; 3073 r.height = or->height; 3074 r.pitches[0] = or->pitch; 3075 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3076 r.handles[0] = or->handle; 3077 3078 ret = drm_mode_addfb2(dev, &r, file_priv); 3079 if (ret) 3080 return ret; 3081 3082 or->fb_id = r.fb_id; 3083 3084 return 0; 3085 } 3086 3087 static int format_check(const struct drm_mode_fb_cmd2 *r) 3088 { 3089 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3090 3091 switch (format) { 3092 case DRM_FORMAT_C8: 3093 case DRM_FORMAT_RGB332: 3094 case DRM_FORMAT_BGR233: 3095 case DRM_FORMAT_XRGB4444: 3096 case DRM_FORMAT_XBGR4444: 3097 case DRM_FORMAT_RGBX4444: 3098 case DRM_FORMAT_BGRX4444: 3099 case DRM_FORMAT_ARGB4444: 3100 case DRM_FORMAT_ABGR4444: 3101 case DRM_FORMAT_RGBA4444: 3102 case DRM_FORMAT_BGRA4444: 3103 case DRM_FORMAT_XRGB1555: 3104 case DRM_FORMAT_XBGR1555: 3105 case DRM_FORMAT_RGBX5551: 3106 case DRM_FORMAT_BGRX5551: 3107 case DRM_FORMAT_ARGB1555: 3108 case DRM_FORMAT_ABGR1555: 3109 case DRM_FORMAT_RGBA5551: 3110 case DRM_FORMAT_BGRA5551: 3111 case DRM_FORMAT_RGB565: 3112 case DRM_FORMAT_BGR565: 3113 case DRM_FORMAT_RGB888: 3114 case DRM_FORMAT_BGR888: 3115 case DRM_FORMAT_XRGB8888: 3116 case DRM_FORMAT_XBGR8888: 3117 case DRM_FORMAT_RGBX8888: 3118 case DRM_FORMAT_BGRX8888: 3119 case DRM_FORMAT_ARGB8888: 3120 case DRM_FORMAT_ABGR8888: 3121 case DRM_FORMAT_RGBA8888: 3122 case DRM_FORMAT_BGRA8888: 3123 case DRM_FORMAT_XRGB2101010: 3124 case DRM_FORMAT_XBGR2101010: 3125 case DRM_FORMAT_RGBX1010102: 3126 case DRM_FORMAT_BGRX1010102: 3127 case DRM_FORMAT_ARGB2101010: 3128 case DRM_FORMAT_ABGR2101010: 3129 case DRM_FORMAT_RGBA1010102: 3130 case DRM_FORMAT_BGRA1010102: 3131 case DRM_FORMAT_YUYV: 3132 case DRM_FORMAT_YVYU: 3133 case DRM_FORMAT_UYVY: 3134 case DRM_FORMAT_VYUY: 3135 case DRM_FORMAT_AYUV: 3136 case DRM_FORMAT_NV12: 3137 case DRM_FORMAT_NV21: 3138 case DRM_FORMAT_NV16: 3139 case DRM_FORMAT_NV61: 3140 case DRM_FORMAT_NV24: 3141 case DRM_FORMAT_NV42: 3142 case DRM_FORMAT_YUV410: 3143 case DRM_FORMAT_YVU410: 3144 case DRM_FORMAT_YUV411: 3145 case DRM_FORMAT_YVU411: 3146 case DRM_FORMAT_YUV420: 3147 case DRM_FORMAT_YVU420: 3148 case DRM_FORMAT_YUV422: 3149 case DRM_FORMAT_YVU422: 3150 case DRM_FORMAT_YUV444: 3151 case DRM_FORMAT_YVU444: 3152 return 0; 3153 default: 3154 DRM_DEBUG_KMS("invalid pixel format %s\n", 3155 drm_get_format_name(r->pixel_format)); 3156 return -EINVAL; 3157 } 3158 } 3159 3160 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3161 { 3162 int ret, hsub, vsub, num_planes, i; 3163 3164 ret = format_check(r); 3165 if (ret) { 3166 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3167 drm_get_format_name(r->pixel_format)); 3168 return ret; 3169 } 3170 3171 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3172 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3173 num_planes = drm_format_num_planes(r->pixel_format); 3174 3175 if (r->width == 0 || r->width % hsub) { 3176 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3177 return -EINVAL; 3178 } 3179 3180 if (r->height == 0 || r->height % vsub) { 3181 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3182 return -EINVAL; 3183 } 3184 3185 for (i = 0; i < num_planes; i++) { 3186 unsigned int width = r->width / (i != 0 ? hsub : 1); 3187 unsigned int height = r->height / (i != 0 ? vsub : 1); 3188 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3189 3190 if (!r->handles[i]) { 3191 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3192 return -EINVAL; 3193 } 3194 3195 if ((uint64_t) width * cpp > UINT_MAX) 3196 return -ERANGE; 3197 3198 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3199 return -ERANGE; 3200 3201 if (r->pitches[i] < width * cpp) { 3202 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3203 return -EINVAL; 3204 } 3205 3206 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { 3207 DRM_DEBUG_KMS("bad fb modifier %"PRIu64" for plane %d\n", 3208 r->modifier[i], i); 3209 return -EINVAL; 3210 } 3211 3212 /* modifier specific checks: */ 3213 switch (r->modifier[i]) { 3214 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: 3215 /* NOTE: the pitch restriction may be lifted later if it turns 3216 * out that no hw has this restriction: 3217 */ 3218 if (r->pixel_format != DRM_FORMAT_NV12 || 3219 width % 128 || height % 32 || 3220 r->pitches[i] % 128) { 3221 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i); 3222 return -EINVAL; 3223 } 3224 break; 3225 3226 default: 3227 break; 3228 } 3229 } 3230 3231 for (i = num_planes; i < 4; i++) { 3232 if (r->modifier[i]) { 3233 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i); 3234 return -EINVAL; 3235 } 3236 3237 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ 3238 if (!(r->flags & DRM_MODE_FB_MODIFIERS)) 3239 continue; 3240 3241 if (r->handles[i]) { 3242 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i); 3243 return -EINVAL; 3244 } 3245 3246 if (r->pitches[i]) { 3247 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i); 3248 return -EINVAL; 3249 } 3250 3251 if (r->offsets[i]) { 3252 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i); 3253 return -EINVAL; 3254 } 3255 } 3256 3257 return 0; 3258 } 3259 3260 static struct drm_framebuffer * 3261 internal_framebuffer_create(struct drm_device *dev, 3262 struct drm_mode_fb_cmd2 *r, 3263 struct drm_file *file_priv) 3264 { 3265 struct drm_mode_config *config = &dev->mode_config; 3266 struct drm_framebuffer *fb; 3267 int ret; 3268 3269 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { 3270 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3271 return ERR_PTR(-EINVAL); 3272 } 3273 3274 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3275 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3276 r->width, config->min_width, config->max_width); 3277 return ERR_PTR(-EINVAL); 3278 } 3279 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3280 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3281 r->height, config->min_height, config->max_height); 3282 return ERR_PTR(-EINVAL); 3283 } 3284 3285 if (r->flags & DRM_MODE_FB_MODIFIERS && 3286 !dev->mode_config.allow_fb_modifiers) { 3287 DRM_DEBUG_KMS("driver does not support fb modifiers\n"); 3288 return ERR_PTR(-EINVAL); 3289 } 3290 3291 ret = framebuffer_check(r); 3292 if (ret) 3293 return ERR_PTR(ret); 3294 3295 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3296 if (IS_ERR(fb)) { 3297 DRM_DEBUG_KMS("could not create framebuffer\n"); 3298 return fb; 3299 } 3300 3301 return fb; 3302 } 3303 3304 /** 3305 * drm_mode_addfb2 - add an FB to the graphics configuration 3306 * @dev: drm device for the ioctl 3307 * @data: data pointer for the ioctl 3308 * @file_priv: drm file for the ioctl call 3309 * 3310 * Add a new FB to the specified CRTC, given a user request with format. This is 3311 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3312 * and uses fourcc codes as pixel format specifiers. 3313 * 3314 * Called by the user via ioctl. 3315 * 3316 * Returns: 3317 * Zero on success, negative errno on failure. 3318 */ 3319 int drm_mode_addfb2(struct drm_device *dev, 3320 void *data, struct drm_file *file_priv) 3321 { 3322 struct drm_mode_fb_cmd2 *r = data; 3323 struct drm_framebuffer *fb; 3324 3325 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3326 return -EINVAL; 3327 3328 fb = internal_framebuffer_create(dev, r, file_priv); 3329 if (IS_ERR(fb)) 3330 return PTR_ERR(fb); 3331 3332 /* Transfer ownership to the filp for reaping on close */ 3333 3334 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3335 mutex_lock(&file_priv->fbs_lock); 3336 r->fb_id = fb->base.id; 3337 list_add(&fb->filp_head, &file_priv->fbs); 3338 mutex_unlock(&file_priv->fbs_lock); 3339 3340 return 0; 3341 } 3342 3343 struct drm_mode_rmfb_work { 3344 struct work_struct work; 3345 struct list_head fbs; 3346 }; 3347 3348 static void drm_mode_rmfb_work_fn(struct work_struct *w) 3349 { 3350 struct drm_mode_rmfb_work *arg = container_of(w, typeof(*arg), work); 3351 3352 while (!list_empty(&arg->fbs)) { 3353 struct drm_framebuffer *fb = 3354 list_first_entry(&arg->fbs, typeof(*fb), filp_head); 3355 3356 list_del_init(&fb->filp_head); 3357 drm_framebuffer_remove(fb); 3358 } 3359 } 3360 3361 /** 3362 * drm_mode_rmfb - remove an FB from the configuration 3363 * @dev: drm device for the ioctl 3364 * @data: data pointer for the ioctl 3365 * @file_priv: drm file for the ioctl call 3366 * 3367 * Remove the FB specified by the user. 3368 * 3369 * Called by the user via ioctl. 3370 * 3371 * Returns: 3372 * Zero on success, negative errno on failure. 3373 */ 3374 int drm_mode_rmfb(struct drm_device *dev, 3375 void *data, struct drm_file *file_priv) 3376 { 3377 struct drm_framebuffer *fb = NULL; 3378 struct drm_framebuffer *fbl = NULL; 3379 uint32_t *id = data; 3380 int found = 0; 3381 3382 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3383 return -EINVAL; 3384 3385 mutex_lock(&file_priv->fbs_lock); 3386 mutex_lock(&dev->mode_config.fb_lock); 3387 fb = __drm_framebuffer_lookup(dev, *id); 3388 if (!fb) 3389 goto fail_lookup; 3390 3391 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3392 if (fb == fbl) 3393 found = 1; 3394 if (!found) 3395 goto fail_lookup; 3396 3397 list_del_init(&fb->filp_head); 3398 mutex_unlock(&dev->mode_config.fb_lock); 3399 mutex_unlock(&file_priv->fbs_lock); 3400 3401 /* 3402 * we now own the reference that was stored in the fbs list 3403 * 3404 * drm_framebuffer_remove may fail with -EINTR on pending signals, 3405 * so run this in a separate stack as there's no way to correctly 3406 * handle this after the fb is already removed from the lookup table. 3407 */ 3408 if (!kref_exclusive_p(&fb->refcount)) { 3409 struct drm_mode_rmfb_work arg; 3410 3411 INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); 3412 INIT_LIST_HEAD(&arg.fbs); 3413 list_add_tail(&fb->filp_head, &arg.fbs); 3414 3415 schedule_work(&arg.work); 3416 flush_work(&arg.work); 3417 destroy_work_on_stack(&arg.work); 3418 } else 3419 drm_framebuffer_unreference(fb); 3420 3421 return 0; 3422 3423 fail_lookup: 3424 mutex_unlock(&dev->mode_config.fb_lock); 3425 mutex_unlock(&file_priv->fbs_lock); 3426 3427 return -ENOENT; 3428 } 3429 3430 /** 3431 * drm_mode_getfb - get FB info 3432 * @dev: drm device for the ioctl 3433 * @data: data pointer for the ioctl 3434 * @file_priv: drm file for the ioctl call 3435 * 3436 * Lookup the FB given its ID and return info about it. 3437 * 3438 * Called by the user via ioctl. 3439 * 3440 * Returns: 3441 * Zero on success, negative errno on failure. 3442 */ 3443 int drm_mode_getfb(struct drm_device *dev, 3444 void *data, struct drm_file *file_priv) 3445 { 3446 struct drm_mode_fb_cmd *r = data; 3447 struct drm_framebuffer *fb; 3448 int ret; 3449 3450 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3451 return -EINVAL; 3452 3453 fb = drm_framebuffer_lookup(dev, r->fb_id); 3454 if (!fb) 3455 return -ENOENT; 3456 3457 r->height = fb->height; 3458 r->width = fb->width; 3459 r->depth = fb->depth; 3460 r->bpp = fb->bits_per_pixel; 3461 r->pitch = fb->pitches[0]; 3462 if (fb->funcs->create_handle) { 3463 if (file_priv->is_master || 3464 #ifdef __NetBSD__ 3465 DRM_SUSER() || 3466 #else 3467 capable(CAP_SYS_ADMIN) || 3468 #endif 3469 drm_is_control_client(file_priv)) { 3470 ret = fb->funcs->create_handle(fb, file_priv, 3471 &r->handle); 3472 } else { 3473 /* GET_FB() is an unprivileged ioctl so we must not 3474 * return a buffer-handle to non-master processes! For 3475 * backwards-compatibility reasons, we cannot make 3476 * GET_FB() privileged, so just return an invalid handle 3477 * for non-masters. */ 3478 r->handle = 0; 3479 ret = 0; 3480 } 3481 } else { 3482 ret = -ENODEV; 3483 } 3484 3485 drm_framebuffer_unreference(fb); 3486 3487 return ret; 3488 } 3489 3490 /** 3491 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3492 * @dev: drm device for the ioctl 3493 * @data: data pointer for the ioctl 3494 * @file_priv: drm file for the ioctl call 3495 * 3496 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3497 * rectangle list. Generic userspace which does frontbuffer rendering must call 3498 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3499 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3500 * 3501 * Modesetting drivers which always update the frontbuffer do not need to 3502 * implement the corresponding ->dirty framebuffer callback. 3503 * 3504 * Called by the user via ioctl. 3505 * 3506 * Returns: 3507 * Zero on success, negative errno on failure. 3508 */ 3509 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3510 void *data, struct drm_file *file_priv) 3511 { 3512 struct drm_clip_rect __user *clips_ptr; 3513 struct drm_clip_rect *clips = NULL; 3514 struct drm_mode_fb_dirty_cmd *r = data; 3515 struct drm_framebuffer *fb; 3516 unsigned flags; 3517 int num_clips; 3518 int ret; 3519 3520 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3521 return -EINVAL; 3522 3523 fb = drm_framebuffer_lookup(dev, r->fb_id); 3524 if (!fb) 3525 return -ENOENT; 3526 3527 num_clips = r->num_clips; 3528 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3529 3530 if (!num_clips != !clips_ptr) { 3531 ret = -EINVAL; 3532 goto out_err1; 3533 } 3534 3535 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3536 3537 /* If userspace annotates copy, clips must come in pairs */ 3538 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3539 ret = -EINVAL; 3540 goto out_err1; 3541 } 3542 3543 if (num_clips && clips_ptr) { 3544 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3545 ret = -EINVAL; 3546 goto out_err1; 3547 } 3548 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); 3549 if (!clips) { 3550 ret = -ENOMEM; 3551 goto out_err1; 3552 } 3553 3554 ret = copy_from_user(clips, clips_ptr, 3555 num_clips * sizeof(*clips)); 3556 if (ret) { 3557 ret = -EFAULT; 3558 goto out_err2; 3559 } 3560 } 3561 3562 if (fb->funcs->dirty) { 3563 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3564 clips, num_clips); 3565 } else { 3566 ret = -ENOSYS; 3567 } 3568 3569 out_err2: 3570 kfree(clips); 3571 out_err1: 3572 drm_framebuffer_unreference(fb); 3573 3574 return ret; 3575 } 3576 3577 /** 3578 * drm_fb_release - remove and free the FBs on this file 3579 * @priv: drm file for the ioctl 3580 * 3581 * Destroy all the FBs associated with @filp. 3582 * 3583 * Called by the user via ioctl. 3584 * 3585 * Returns: 3586 * Zero on success, negative errno on failure. 3587 */ 3588 void drm_fb_release(struct drm_file *priv) 3589 { 3590 struct drm_framebuffer *fb, *tfb; 3591 struct drm_mode_rmfb_work arg; 3592 3593 INIT_LIST_HEAD(&arg.fbs); 3594 3595 /* 3596 * When the file gets released that means no one else can access the fb 3597 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3598 * avoid upsetting lockdep since the universal cursor code adds a 3599 * framebuffer while holding mutex locks. 3600 * 3601 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3602 * locks is impossible here since no one else but this function can get 3603 * at it any more. 3604 */ 3605 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3606 if (!kref_exclusive_p(&fb->refcount)) { 3607 list_move_tail(&fb->filp_head, &arg.fbs); 3608 } else { 3609 list_del_init(&fb->filp_head); 3610 3611 /* This drops the fpriv->fbs reference. */ 3612 drm_framebuffer_unreference(fb); 3613 } 3614 } 3615 3616 if (!list_empty(&arg.fbs)) { 3617 INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); 3618 3619 schedule_work(&arg.work); 3620 flush_work(&arg.work); 3621 destroy_work_on_stack(&arg.work); 3622 } 3623 } 3624 3625 /** 3626 * drm_property_create - create a new property type 3627 * @dev: drm device 3628 * @flags: flags specifying the property type 3629 * @name: name of the property 3630 * @num_values: number of pre-defined values 3631 * 3632 * This creates a new generic drm property which can then be attached to a drm 3633 * object with drm_object_attach_property. The returned property object must be 3634 * freed with drm_property_destroy. 3635 * 3636 * Note that the DRM core keeps a per-device list of properties and that, if 3637 * drm_mode_config_cleanup() is called, it will destroy all properties created 3638 * by the driver. 3639 * 3640 * Returns: 3641 * A pointer to the newly created property on success, NULL on failure. 3642 */ 3643 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3644 const char *name, int num_values) 3645 { 3646 struct drm_property *property = NULL; 3647 int ret; 3648 3649 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3650 if (!property) 3651 return NULL; 3652 3653 property->dev = dev; 3654 3655 if (num_values) { 3656 property->values = kcalloc(num_values, sizeof(uint64_t), 3657 GFP_KERNEL); 3658 if (!property->values) 3659 goto fail; 3660 } 3661 3662 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3663 if (ret) 3664 goto fail; 3665 3666 property->flags = flags; 3667 property->num_values = num_values; 3668 INIT_LIST_HEAD(&property->enum_list); 3669 3670 if (name) { 3671 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3672 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3673 } 3674 3675 list_add_tail(&property->head, &dev->mode_config.property_list); 3676 3677 WARN_ON(!drm_property_type_valid(property)); 3678 3679 return property; 3680 fail: 3681 kfree(property->values); 3682 kfree(property); 3683 return NULL; 3684 } 3685 EXPORT_SYMBOL(drm_property_create); 3686 3687 /** 3688 * drm_property_create_enum - create a new enumeration property type 3689 * @dev: drm device 3690 * @flags: flags specifying the property type 3691 * @name: name of the property 3692 * @props: enumeration lists with property values 3693 * @num_values: number of pre-defined values 3694 * 3695 * This creates a new generic drm property which can then be attached to a drm 3696 * object with drm_object_attach_property. The returned property object must be 3697 * freed with drm_property_destroy. 3698 * 3699 * Userspace is only allowed to set one of the predefined values for enumeration 3700 * properties. 3701 * 3702 * Returns: 3703 * A pointer to the newly created property on success, NULL on failure. 3704 */ 3705 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3706 const char *name, 3707 const struct drm_prop_enum_list *props, 3708 int num_values) 3709 { 3710 struct drm_property *property; 3711 int i, ret; 3712 3713 flags |= DRM_MODE_PROP_ENUM; 3714 3715 property = drm_property_create(dev, flags, name, num_values); 3716 if (!property) 3717 return NULL; 3718 3719 for (i = 0; i < num_values; i++) { 3720 ret = drm_property_add_enum(property, i, 3721 props[i].type, 3722 props[i].name); 3723 if (ret) { 3724 drm_property_destroy(dev, property); 3725 return NULL; 3726 } 3727 } 3728 3729 return property; 3730 } 3731 EXPORT_SYMBOL(drm_property_create_enum); 3732 3733 /** 3734 * drm_property_create_bitmask - create a new bitmask property type 3735 * @dev: drm device 3736 * @flags: flags specifying the property type 3737 * @name: name of the property 3738 * @props: enumeration lists with property bitflags 3739 * @num_props: size of the @props array 3740 * @supported_bits: bitmask of all supported enumeration values 3741 * 3742 * This creates a new bitmask drm property which can then be attached to a drm 3743 * object with drm_object_attach_property. The returned property object must be 3744 * freed with drm_property_destroy. 3745 * 3746 * Compared to plain enumeration properties userspace is allowed to set any 3747 * or'ed together combination of the predefined property bitflag values 3748 * 3749 * Returns: 3750 * A pointer to the newly created property on success, NULL on failure. 3751 */ 3752 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3753 int flags, const char *name, 3754 const struct drm_prop_enum_list *props, 3755 int num_props, 3756 uint64_t supported_bits) 3757 { 3758 struct drm_property *property; 3759 int i, ret, index = 0; 3760 int num_values = hweight64(supported_bits); 3761 3762 flags |= DRM_MODE_PROP_BITMASK; 3763 3764 property = drm_property_create(dev, flags, name, num_values); 3765 if (!property) 3766 return NULL; 3767 for (i = 0; i < num_props; i++) { 3768 if (!(supported_bits & (1ULL << props[i].type))) 3769 continue; 3770 3771 if (WARN_ON(index >= num_values)) { 3772 drm_property_destroy(dev, property); 3773 return NULL; 3774 } 3775 3776 ret = drm_property_add_enum(property, index++, 3777 props[i].type, 3778 props[i].name); 3779 if (ret) { 3780 drm_property_destroy(dev, property); 3781 return NULL; 3782 } 3783 } 3784 3785 return property; 3786 } 3787 EXPORT_SYMBOL(drm_property_create_bitmask); 3788 3789 static struct drm_property *property_create_range(struct drm_device *dev, 3790 int flags, const char *name, 3791 uint64_t min, uint64_t max) 3792 { 3793 struct drm_property *property; 3794 3795 property = drm_property_create(dev, flags, name, 2); 3796 if (!property) 3797 return NULL; 3798 3799 property->values[0] = min; 3800 property->values[1] = max; 3801 3802 return property; 3803 } 3804 3805 /** 3806 * drm_property_create_range - create a new unsigned ranged property type 3807 * @dev: drm device 3808 * @flags: flags specifying the property type 3809 * @name: name of the property 3810 * @min: minimum value of the property 3811 * @max: maximum value of the property 3812 * 3813 * This creates a new generic drm property which can then be attached to a drm 3814 * object with drm_object_attach_property. The returned property object must be 3815 * freed with drm_property_destroy. 3816 * 3817 * Userspace is allowed to set any unsigned integer value in the (min, max) 3818 * range inclusive. 3819 * 3820 * Returns: 3821 * A pointer to the newly created property on success, NULL on failure. 3822 */ 3823 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3824 const char *name, 3825 uint64_t min, uint64_t max) 3826 { 3827 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3828 name, min, max); 3829 } 3830 EXPORT_SYMBOL(drm_property_create_range); 3831 3832 /** 3833 * drm_property_create_signed_range - create a new signed ranged property type 3834 * @dev: drm device 3835 * @flags: flags specifying the property type 3836 * @name: name of the property 3837 * @min: minimum value of the property 3838 * @max: maximum value of the property 3839 * 3840 * This creates a new generic drm property which can then be attached to a drm 3841 * object with drm_object_attach_property. The returned property object must be 3842 * freed with drm_property_destroy. 3843 * 3844 * Userspace is allowed to set any signed integer value in the (min, max) 3845 * range inclusive. 3846 * 3847 * Returns: 3848 * A pointer to the newly created property on success, NULL on failure. 3849 */ 3850 struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3851 int flags, const char *name, 3852 int64_t min, int64_t max) 3853 { 3854 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3855 name, I642U64(min), I642U64(max)); 3856 } 3857 EXPORT_SYMBOL(drm_property_create_signed_range); 3858 3859 /** 3860 * drm_property_create_object - create a new object property type 3861 * @dev: drm device 3862 * @flags: flags specifying the property type 3863 * @name: name of the property 3864 * @type: object type from DRM_MODE_OBJECT_* defines 3865 * 3866 * This creates a new generic drm property which can then be attached to a drm 3867 * object with drm_object_attach_property. The returned property object must be 3868 * freed with drm_property_destroy. 3869 * 3870 * Userspace is only allowed to set this to any property value of the given 3871 * @type. Only useful for atomic properties, which is enforced. 3872 * 3873 * Returns: 3874 * A pointer to the newly created property on success, NULL on failure. 3875 */ 3876 struct drm_property *drm_property_create_object(struct drm_device *dev, 3877 int flags, const char *name, uint32_t type) 3878 { 3879 struct drm_property *property; 3880 3881 flags |= DRM_MODE_PROP_OBJECT; 3882 3883 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) 3884 return NULL; 3885 3886 property = drm_property_create(dev, flags, name, 1); 3887 if (!property) 3888 return NULL; 3889 3890 property->values[0] = type; 3891 3892 return property; 3893 } 3894 EXPORT_SYMBOL(drm_property_create_object); 3895 3896 /** 3897 * drm_property_create_bool - create a new boolean property type 3898 * @dev: drm device 3899 * @flags: flags specifying the property type 3900 * @name: name of the property 3901 * 3902 * This creates a new generic drm property which can then be attached to a drm 3903 * object with drm_object_attach_property. The returned property object must be 3904 * freed with drm_property_destroy. 3905 * 3906 * This is implemented as a ranged property with only {0, 1} as valid values. 3907 * 3908 * Returns: 3909 * A pointer to the newly created property on success, NULL on failure. 3910 */ 3911 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, 3912 const char *name) 3913 { 3914 return drm_property_create_range(dev, flags, name, 0, 1); 3915 } 3916 EXPORT_SYMBOL(drm_property_create_bool); 3917 3918 /** 3919 * drm_property_add_enum - add a possible value to an enumeration property 3920 * @property: enumeration property to change 3921 * @index: index of the new enumeration 3922 * @value: value of the new enumeration 3923 * @name: symbolic name of the new enumeration 3924 * 3925 * This functions adds enumerations to a property. 3926 * 3927 * It's use is deprecated, drivers should use one of the more specific helpers 3928 * to directly create the property with all enumerations already attached. 3929 * 3930 * Returns: 3931 * Zero on success, error code on failure. 3932 */ 3933 int drm_property_add_enum(struct drm_property *property, int index, 3934 uint64_t value, const char *name) 3935 { 3936 struct drm_property_enum *prop_enum; 3937 3938 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3939 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3940 return -EINVAL; 3941 3942 /* 3943 * Bitmask enum properties have the additional constraint of values 3944 * from 0 to 63 3945 */ 3946 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3947 (value > 63)) 3948 return -EINVAL; 3949 3950 if (!list_empty(&property->enum_list)) { 3951 list_for_each_entry(prop_enum, &property->enum_list, head) { 3952 if (prop_enum->value == value) { 3953 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3954 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3955 return 0; 3956 } 3957 } 3958 } 3959 3960 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3961 if (!prop_enum) 3962 return -ENOMEM; 3963 3964 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3965 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3966 prop_enum->value = value; 3967 3968 property->values[index] = value; 3969 list_add_tail(&prop_enum->head, &property->enum_list); 3970 return 0; 3971 } 3972 EXPORT_SYMBOL(drm_property_add_enum); 3973 3974 /** 3975 * drm_property_destroy - destroy a drm property 3976 * @dev: drm device 3977 * @property: property to destry 3978 * 3979 * This function frees a property including any attached resources like 3980 * enumeration values. 3981 */ 3982 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 3983 { 3984 struct drm_property_enum *prop_enum, *pt; 3985 3986 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 3987 list_del(&prop_enum->head); 3988 kfree(prop_enum); 3989 } 3990 3991 if (property->num_values) 3992 kfree(property->values); 3993 drm_mode_object_put(dev, &property->base); 3994 list_del(&property->head); 3995 kfree(property); 3996 } 3997 EXPORT_SYMBOL(drm_property_destroy); 3998 3999 /** 4000 * drm_object_attach_property - attach a property to a modeset object 4001 * @obj: drm modeset object 4002 * @property: property to attach 4003 * @init_val: initial value of the property 4004 * 4005 * This attaches the given property to the modeset object with the given initial 4006 * value. Currently this function cannot fail since the properties are stored in 4007 * a statically sized array. 4008 */ 4009 void drm_object_attach_property(struct drm_mode_object *obj, 4010 struct drm_property *property, 4011 uint64_t init_val) 4012 { 4013 int count = obj->properties->count; 4014 4015 if (count == DRM_OBJECT_MAX_PROPERTY) { 4016 WARN(1, "Failed to attach object property (type: 0x%x). Please " 4017 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 4018 "you see this message on the same object type.\n", 4019 obj->type); 4020 return; 4021 } 4022 4023 obj->properties->properties[count] = property; 4024 obj->properties->values[count] = init_val; 4025 obj->properties->count++; 4026 if (property->flags & DRM_MODE_PROP_ATOMIC) 4027 obj->properties->atomic_count++; 4028 } 4029 EXPORT_SYMBOL(drm_object_attach_property); 4030 4031 /** 4032 * drm_object_property_set_value - set the value of a property 4033 * @obj: drm mode object to set property value for 4034 * @property: property to set 4035 * @val: value the property should be set to 4036 * 4037 * This functions sets a given property on a given object. This function only 4038 * changes the software state of the property, it does not call into the 4039 * driver's ->set_property callback. 4040 * 4041 * Returns: 4042 * Zero on success, error code on failure. 4043 */ 4044 int drm_object_property_set_value(struct drm_mode_object *obj, 4045 struct drm_property *property, uint64_t val) 4046 { 4047 int i; 4048 4049 for (i = 0; i < obj->properties->count; i++) { 4050 if (obj->properties->properties[i] == property) { 4051 obj->properties->values[i] = val; 4052 return 0; 4053 } 4054 } 4055 4056 return -EINVAL; 4057 } 4058 EXPORT_SYMBOL(drm_object_property_set_value); 4059 4060 /** 4061 * drm_object_property_get_value - retrieve the value of a property 4062 * @obj: drm mode object to get property value from 4063 * @property: property to retrieve 4064 * @val: storage for the property value 4065 * 4066 * This function retrieves the softare state of the given property for the given 4067 * property. Since there is no driver callback to retrieve the current property 4068 * value this might be out of sync with the hardware, depending upon the driver 4069 * and property. 4070 * 4071 * Returns: 4072 * Zero on success, error code on failure. 4073 */ 4074 int drm_object_property_get_value(struct drm_mode_object *obj, 4075 struct drm_property *property, uint64_t *val) 4076 { 4077 int i; 4078 4079 /* read-only properties bypass atomic mechanism and still store 4080 * their value in obj->properties->values[].. mostly to avoid 4081 * having to deal w/ EDID and similar props in atomic paths: 4082 */ 4083 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && 4084 !(property->flags & DRM_MODE_PROP_IMMUTABLE)) 4085 return drm_atomic_get_property(obj, property, val); 4086 4087 for (i = 0; i < obj->properties->count; i++) { 4088 if (obj->properties->properties[i] == property) { 4089 *val = obj->properties->values[i]; 4090 return 0; 4091 } 4092 } 4093 4094 return -EINVAL; 4095 } 4096 EXPORT_SYMBOL(drm_object_property_get_value); 4097 4098 /** 4099 * drm_mode_getproperty_ioctl - get the property metadata 4100 * @dev: DRM device 4101 * @data: ioctl data 4102 * @file_priv: DRM file info 4103 * 4104 * This function retrieves the metadata for a given property, like the different 4105 * possible values for an enum property or the limits for a range property. 4106 * 4107 * Blob properties are special 4108 * 4109 * Called by the user via ioctl. 4110 * 4111 * Returns: 4112 * Zero on success, negative errno on failure. 4113 */ 4114 int drm_mode_getproperty_ioctl(struct drm_device *dev, 4115 void *data, struct drm_file *file_priv) 4116 { 4117 struct drm_mode_get_property *out_resp = data; 4118 struct drm_property *property; 4119 int enum_count = 0; 4120 int value_count = 0; 4121 int ret = 0, i; 4122 int copied; 4123 struct drm_property_enum *prop_enum; 4124 struct drm_mode_property_enum __user *enum_ptr; 4125 uint64_t __user *values_ptr; 4126 4127 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4128 return -EINVAL; 4129 4130 drm_modeset_lock_all(dev); 4131 property = drm_property_find(dev, out_resp->prop_id); 4132 if (!property) { 4133 ret = -ENOENT; 4134 goto done; 4135 } 4136 4137 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4138 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4139 list_for_each_entry(prop_enum, &property->enum_list, head) 4140 enum_count++; 4141 } 4142 4143 value_count = property->num_values; 4144 4145 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 4146 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 4147 out_resp->flags = property->flags; 4148 4149 if ((out_resp->count_values >= value_count) && value_count) { 4150 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 4151 for (i = 0; i < value_count; i++) { 4152 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 4153 ret = -EFAULT; 4154 goto done; 4155 } 4156 } 4157 } 4158 out_resp->count_values = value_count; 4159 4160 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4161 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4162 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 4163 copied = 0; 4164 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 4165 list_for_each_entry(prop_enum, &property->enum_list, head) { 4166 4167 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 4168 ret = -EFAULT; 4169 goto done; 4170 } 4171 4172 if (copy_to_user(&enum_ptr[copied].name, 4173 &prop_enum->name, DRM_PROP_NAME_LEN)) { 4174 ret = -EFAULT; 4175 goto done; 4176 } 4177 copied++; 4178 } 4179 } 4180 out_resp->count_enum_blobs = enum_count; 4181 } 4182 4183 /* 4184 * NOTE: The idea seems to have been to use this to read all the blob 4185 * property values. But nothing ever added them to the corresponding 4186 * list, userspace always used the special-purpose get_blob ioctl to 4187 * read the value for a blob property. It also doesn't make a lot of 4188 * sense to return values here when everything else is just metadata for 4189 * the property itself. 4190 */ 4191 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4192 out_resp->count_enum_blobs = 0; 4193 done: 4194 drm_modeset_unlock_all(dev); 4195 return ret; 4196 } 4197 4198 /** 4199 * drm_property_create_blob - Create new blob property 4200 * 4201 * Creates a new blob property for a specified DRM device, optionally 4202 * copying data. 4203 * 4204 * @dev: DRM device to create property for 4205 * @length: Length to allocate for blob data 4206 * @data: If specified, copies data into blob 4207 * 4208 * Returns: 4209 * New blob property with a single reference on success, or an ERR_PTR 4210 * value on failure. 4211 */ 4212 struct drm_property_blob * 4213 drm_property_create_blob(struct drm_device *dev, size_t length, 4214 const void *data) 4215 { 4216 struct drm_property_blob *blob; 4217 int ret; 4218 4219 if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob)) 4220 return ERR_PTR(-EINVAL); 4221 4222 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4223 if (!blob) 4224 return ERR_PTR(-ENOMEM); 4225 4226 /* This must be explicitly initialised, so we can safely call list_del 4227 * on it in the removal handler, even if it isn't in a file list. */ 4228 INIT_LIST_HEAD(&blob->head_file); 4229 blob->length = length; 4230 blob->dev = dev; 4231 4232 if (data) 4233 memcpy(blob->data, data, length); 4234 4235 mutex_lock(&dev->mode_config.blob_lock); 4236 4237 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 4238 if (ret) { 4239 kfree(blob); 4240 mutex_unlock(&dev->mode_config.blob_lock); 4241 return ERR_PTR(-EINVAL); 4242 } 4243 4244 kref_init(&blob->refcount); 4245 4246 list_add_tail(&blob->head_global, 4247 &dev->mode_config.property_blob_list); 4248 4249 mutex_unlock(&dev->mode_config.blob_lock); 4250 4251 return blob; 4252 } 4253 EXPORT_SYMBOL(drm_property_create_blob); 4254 4255 /** 4256 * drm_property_free_blob - Blob property destructor 4257 * 4258 * Internal free function for blob properties; must not be used directly. 4259 * 4260 * @kref: Reference 4261 */ 4262 static void drm_property_free_blob(struct kref *kref) 4263 { 4264 struct drm_property_blob *blob = 4265 container_of(kref, struct drm_property_blob, refcount); 4266 4267 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock)); 4268 4269 list_del(&blob->head_global); 4270 list_del(&blob->head_file); 4271 drm_mode_object_put(blob->dev, &blob->base); 4272 4273 kfree(blob); 4274 } 4275 4276 /** 4277 * drm_property_unreference_blob - Unreference a blob property 4278 * 4279 * Drop a reference on a blob property. May free the object. 4280 * 4281 * @blob: Pointer to blob property 4282 */ 4283 void drm_property_unreference_blob(struct drm_property_blob *blob) 4284 { 4285 struct drm_device *dev; 4286 4287 if (!blob) 4288 return; 4289 4290 dev = blob->dev; 4291 4292 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, blob->refcount.kr_count); 4293 4294 if (kref_put_mutex(&blob->refcount, drm_property_free_blob, 4295 &dev->mode_config.blob_lock)) 4296 mutex_unlock(&dev->mode_config.blob_lock); 4297 else 4298 might_lock(&dev->mode_config.blob_lock); 4299 } 4300 EXPORT_SYMBOL(drm_property_unreference_blob); 4301 4302 /** 4303 * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held 4304 * 4305 * Drop a reference on a blob property. May free the object. This must be 4306 * called with blob_lock held. 4307 * 4308 * @blob: Pointer to blob property 4309 */ 4310 static void drm_property_unreference_blob_locked(struct drm_property_blob *blob) 4311 { 4312 if (!blob) 4313 return; 4314 4315 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, blob->refcount.kr_count); 4316 4317 kref_put(&blob->refcount, drm_property_free_blob); 4318 } 4319 4320 /** 4321 * drm_property_destroy_user_blobs - destroy all blobs created by this client 4322 * @dev: DRM device 4323 * @file_priv: destroy all blobs owned by this file handle 4324 */ 4325 void drm_property_destroy_user_blobs(struct drm_device *dev, 4326 struct drm_file *file_priv) 4327 { 4328 struct drm_property_blob *blob, *bt; 4329 4330 mutex_lock(&dev->mode_config.blob_lock); 4331 4332 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) { 4333 list_del_init(&blob->head_file); 4334 drm_property_unreference_blob_locked(blob); 4335 } 4336 4337 mutex_unlock(&dev->mode_config.blob_lock); 4338 } 4339 4340 /** 4341 * drm_property_reference_blob - Take a reference on an existing property 4342 * 4343 * Take a new reference on an existing blob property. 4344 * 4345 * @blob: Pointer to blob property 4346 */ 4347 struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob) 4348 { 4349 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, blob->refcount.kr_count); 4350 kref_get(&blob->refcount); 4351 return blob; 4352 } 4353 EXPORT_SYMBOL(drm_property_reference_blob); 4354 4355 /* 4356 * Like drm_property_lookup_blob, but does not return an additional reference. 4357 * Must be called with blob_lock held. 4358 */ 4359 static struct drm_property_blob *__drm_property_lookup_blob(struct drm_device *dev, 4360 uint32_t id) 4361 { 4362 struct drm_mode_object *obj = NULL; 4363 struct drm_property_blob *blob; 4364 4365 WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock)); 4366 4367 mutex_lock(&dev->mode_config.idr_mutex); 4368 obj = idr_find(&dev->mode_config.crtc_idr, id); 4369 if (!obj || (obj->type != DRM_MODE_OBJECT_BLOB) || (obj->id != id)) 4370 blob = NULL; 4371 else 4372 blob = obj_to_blob(obj); 4373 mutex_unlock(&dev->mode_config.idr_mutex); 4374 4375 return blob; 4376 } 4377 4378 /** 4379 * drm_property_lookup_blob - look up a blob property and take a reference 4380 * @dev: drm device 4381 * @id: id of the blob property 4382 * 4383 * If successful, this takes an additional reference to the blob property. 4384 * callers need to make sure to eventually unreference the returned property 4385 * again, using @drm_property_unreference_blob. 4386 */ 4387 struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev, 4388 uint32_t id) 4389 { 4390 struct drm_property_blob *blob; 4391 4392 mutex_lock(&dev->mode_config.blob_lock); 4393 blob = __drm_property_lookup_blob(dev, id); 4394 if (blob) { 4395 if (!kref_get_unless_zero(&blob->refcount)) 4396 blob = NULL; 4397 } 4398 mutex_unlock(&dev->mode_config.blob_lock); 4399 4400 return blob; 4401 } 4402 EXPORT_SYMBOL(drm_property_lookup_blob); 4403 4404 /** 4405 * drm_property_replace_global_blob - atomically replace existing blob property 4406 * @dev: drm device 4407 * @replace: location of blob property pointer to be replaced 4408 * @length: length of data for new blob, or 0 for no data 4409 * @data: content for new blob, or NULL for no data 4410 * @obj_holds_id: optional object for property holding blob ID 4411 * @prop_holds_id: optional property holding blob ID 4412 * @return 0 on success or error on failure 4413 * 4414 * This function will atomically replace a global property in the blob list, 4415 * optionally updating a property which holds the ID of that property. It is 4416 * guaranteed to be atomic: no caller will be allowed to see intermediate 4417 * results, and either the entire operation will succeed and clean up the 4418 * previous property, or it will fail and the state will be unchanged. 4419 * 4420 * If length is 0 or data is NULL, no new blob will be created, and the holding 4421 * property, if specified, will be set to 0. 4422 * 4423 * Access to the replace pointer is assumed to be protected by the caller, e.g. 4424 * by holding the relevant modesetting object lock for its parent. 4425 * 4426 * For example, a drm_connector has a 'PATH' property, which contains the ID 4427 * of a blob property with the value of the MST path information. Calling this 4428 * function with replace pointing to the connector's path_blob_ptr, length and 4429 * data set for the new path information, obj_holds_id set to the connector's 4430 * base object, and prop_holds_id set to the path property name, will perform 4431 * a completely atomic update. The access to path_blob_ptr is protected by the 4432 * caller holding a lock on the connector. 4433 */ 4434 static int drm_property_replace_global_blob(struct drm_device *dev, 4435 struct drm_property_blob **replace, 4436 size_t length, 4437 const void *data, 4438 struct drm_mode_object *obj_holds_id, 4439 struct drm_property *prop_holds_id) 4440 { 4441 struct drm_property_blob *new_blob = NULL; 4442 struct drm_property_blob *old_blob = NULL; 4443 int ret; 4444 4445 WARN_ON(replace == NULL); 4446 4447 old_blob = *replace; 4448 4449 if (length && data) { 4450 new_blob = drm_property_create_blob(dev, length, data); 4451 if (IS_ERR(new_blob)) 4452 return PTR_ERR(new_blob); 4453 } 4454 4455 /* This does not need to be synchronised with blob_lock, as the 4456 * get_properties ioctl locks all modesetting objects, and 4457 * obj_holds_id must be locked before calling here, so we cannot 4458 * have its value out of sync with the list membership modified 4459 * below under blob_lock. */ 4460 if (obj_holds_id) { 4461 ret = drm_object_property_set_value(obj_holds_id, 4462 prop_holds_id, 4463 new_blob ? 4464 new_blob->base.id : 0); 4465 if (ret != 0) 4466 goto err_created; 4467 } 4468 4469 drm_property_unreference_blob(old_blob); 4470 *replace = new_blob; 4471 4472 return 0; 4473 4474 err_created: 4475 drm_property_unreference_blob(new_blob); 4476 return ret; 4477 } 4478 4479 /** 4480 * drm_mode_getblob_ioctl - get the contents of a blob property value 4481 * @dev: DRM device 4482 * @data: ioctl data 4483 * @file_priv: DRM file info 4484 * 4485 * This function retrieves the contents of a blob property. The value stored in 4486 * an object's blob property is just a normal modeset object id. 4487 * 4488 * Called by the user via ioctl. 4489 * 4490 * Returns: 4491 * Zero on success, negative errno on failure. 4492 */ 4493 int drm_mode_getblob_ioctl(struct drm_device *dev, 4494 void *data, struct drm_file *file_priv) 4495 { 4496 struct drm_mode_get_blob *out_resp = data; 4497 struct drm_property_blob *blob; 4498 int ret = 0; 4499 void __user *blob_ptr; 4500 4501 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4502 return -EINVAL; 4503 4504 drm_modeset_lock_all(dev); 4505 mutex_lock(&dev->mode_config.blob_lock); 4506 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4507 if (!blob) { 4508 ret = -ENOENT; 4509 goto done; 4510 } 4511 4512 if (out_resp->length == blob->length) { 4513 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4514 if (copy_to_user(blob_ptr, blob->data, blob->length)) { 4515 ret = -EFAULT; 4516 goto done; 4517 } 4518 } 4519 out_resp->length = blob->length; 4520 4521 done: 4522 mutex_unlock(&dev->mode_config.blob_lock); 4523 drm_modeset_unlock_all(dev); 4524 return ret; 4525 } 4526 4527 /** 4528 * drm_mode_createblob_ioctl - create a new blob property 4529 * @dev: DRM device 4530 * @data: ioctl data 4531 * @file_priv: DRM file info 4532 * 4533 * This function creates a new blob property with user-defined values. In order 4534 * to give us sensible validation and checking when creating, rather than at 4535 * every potential use, we also require a type to be provided upfront. 4536 * 4537 * Called by the user via ioctl. 4538 * 4539 * Returns: 4540 * Zero on success, negative errno on failure. 4541 */ 4542 int drm_mode_createblob_ioctl(struct drm_device *dev, 4543 void *data, struct drm_file *file_priv) 4544 { 4545 struct drm_mode_create_blob *out_resp = data; 4546 struct drm_property_blob *blob; 4547 void __user *blob_ptr; 4548 int ret = 0; 4549 4550 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4551 return -EINVAL; 4552 4553 blob = drm_property_create_blob(dev, out_resp->length, NULL); 4554 if (IS_ERR(blob)) 4555 return PTR_ERR(blob); 4556 4557 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4558 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) { 4559 ret = -EFAULT; 4560 goto out_blob; 4561 } 4562 4563 /* Dropping the lock between create_blob and our access here is safe 4564 * as only the same file_priv can remove the blob; at this point, it is 4565 * not associated with any file_priv. */ 4566 mutex_lock(&dev->mode_config.blob_lock); 4567 out_resp->blob_id = blob->base.id; 4568 list_add_tail(&blob->head_file, &file_priv->blobs); 4569 mutex_unlock(&dev->mode_config.blob_lock); 4570 4571 return 0; 4572 4573 out_blob: 4574 drm_property_unreference_blob(blob); 4575 return ret; 4576 } 4577 4578 /** 4579 * drm_mode_destroyblob_ioctl - destroy a user blob property 4580 * @dev: DRM device 4581 * @data: ioctl data 4582 * @file_priv: DRM file info 4583 * 4584 * Destroy an existing user-defined blob property. 4585 * 4586 * Called by the user via ioctl. 4587 * 4588 * Returns: 4589 * Zero on success, negative errno on failure. 4590 */ 4591 int drm_mode_destroyblob_ioctl(struct drm_device *dev, 4592 void *data, struct drm_file *file_priv) 4593 { 4594 struct drm_mode_destroy_blob *out_resp = data; 4595 struct drm_property_blob *blob = NULL, *bt; 4596 bool found = false; 4597 int ret = 0; 4598 4599 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4600 return -EINVAL; 4601 4602 mutex_lock(&dev->mode_config.blob_lock); 4603 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4604 if (!blob) { 4605 ret = -ENOENT; 4606 goto err; 4607 } 4608 4609 /* Ensure the property was actually created by this user. */ 4610 list_for_each_entry(bt, &file_priv->blobs, head_file) { 4611 if (bt == blob) { 4612 found = true; 4613 break; 4614 } 4615 } 4616 4617 if (!found) { 4618 ret = -EPERM; 4619 goto err; 4620 } 4621 4622 /* We must drop head_file here, because we may not be the last 4623 * reference on the blob. */ 4624 list_del_init(&blob->head_file); 4625 drm_property_unreference_blob_locked(blob); 4626 mutex_unlock(&dev->mode_config.blob_lock); 4627 4628 return 0; 4629 4630 err: 4631 mutex_unlock(&dev->mode_config.blob_lock); 4632 return ret; 4633 } 4634 4635 /** 4636 * drm_mode_connector_set_path_property - set tile property on connector 4637 * @connector: connector to set property on. 4638 * @path: path to use for property; must not be NULL. 4639 * 4640 * This creates a property to expose to userspace to specify a 4641 * connector path. This is mainly used for DisplayPort MST where 4642 * connectors have a topology and we want to allow userspace to give 4643 * them more meaningful names. 4644 * 4645 * Returns: 4646 * Zero on success, negative errno on failure. 4647 */ 4648 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4649 const char *path) 4650 { 4651 struct drm_device *dev = connector->dev; 4652 int ret; 4653 4654 ret = drm_property_replace_global_blob(dev, 4655 &connector->path_blob_ptr, 4656 strlen(path) + 1, 4657 path, 4658 &connector->base, 4659 dev->mode_config.path_property); 4660 return ret; 4661 } 4662 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4663 4664 /** 4665 * drm_mode_connector_set_tile_property - set tile property on connector 4666 * @connector: connector to set property on. 4667 * 4668 * This looks up the tile information for a connector, and creates a 4669 * property for userspace to parse if it exists. The property is of 4670 * the form of 8 integers using ':' as a separator. 4671 * 4672 * Returns: 4673 * Zero on success, errno on failure. 4674 */ 4675 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4676 { 4677 struct drm_device *dev = connector->dev; 4678 char tile[256]; 4679 int ret; 4680 4681 if (!connector->has_tile) { 4682 ret = drm_property_replace_global_blob(dev, 4683 &connector->tile_blob_ptr, 4684 0, 4685 NULL, 4686 &connector->base, 4687 dev->mode_config.tile_property); 4688 return ret; 4689 } 4690 4691 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4692 connector->tile_group->id, connector->tile_is_single_monitor, 4693 connector->num_h_tile, connector->num_v_tile, 4694 connector->tile_h_loc, connector->tile_v_loc, 4695 connector->tile_h_size, connector->tile_v_size); 4696 4697 ret = drm_property_replace_global_blob(dev, 4698 &connector->tile_blob_ptr, 4699 strlen(tile) + 1, 4700 tile, 4701 &connector->base, 4702 dev->mode_config.tile_property); 4703 return ret; 4704 } 4705 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4706 4707 /** 4708 * drm_mode_connector_update_edid_property - update the edid property of a connector 4709 * @connector: drm connector 4710 * @edid: new value of the edid property 4711 * 4712 * This function creates a new blob modeset object and assigns its id to the 4713 * connector's edid property. 4714 * 4715 * Returns: 4716 * Zero on success, negative errno on failure. 4717 */ 4718 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4719 const struct edid *edid) 4720 { 4721 struct drm_device *dev = connector->dev; 4722 size_t size = 0; 4723 int ret; 4724 4725 /* ignore requests to set edid when overridden */ 4726 if (connector->override_edid) 4727 return 0; 4728 4729 if (edid) 4730 size = EDID_LENGTH * (1 + edid->extensions); 4731 4732 ret = drm_property_replace_global_blob(dev, 4733 &connector->edid_blob_ptr, 4734 size, 4735 edid, 4736 &connector->base, 4737 dev->mode_config.edid_property); 4738 return ret; 4739 } 4740 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4741 4742 /* Some properties could refer to dynamic refcnt'd objects, or things that 4743 * need special locking to handle lifetime issues (ie. to ensure the prop 4744 * value doesn't become invalid part way through the property update due to 4745 * race). The value returned by reference via 'obj' should be passed back 4746 * to drm_property_change_valid_put() after the property is set (and the 4747 * object to which the property is attached has a chance to take it's own 4748 * reference). 4749 */ 4750 bool drm_property_change_valid_get(struct drm_property *property, 4751 uint64_t value, struct drm_mode_object **ref) 4752 { 4753 int i; 4754 4755 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4756 return false; 4757 4758 *ref = NULL; 4759 4760 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4761 if (value < property->values[0] || value > property->values[1]) 4762 return false; 4763 return true; 4764 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4765 int64_t svalue = U642I64(value); 4766 4767 if (svalue < U642I64(property->values[0]) || 4768 svalue > U642I64(property->values[1])) 4769 return false; 4770 return true; 4771 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4772 uint64_t valid_mask = 0; 4773 4774 for (i = 0; i < property->num_values; i++) 4775 valid_mask |= (1ULL << property->values[i]); 4776 return !(value & ~valid_mask); 4777 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4778 struct drm_property_blob *blob; 4779 4780 if (value == 0) 4781 return true; 4782 4783 blob = drm_property_lookup_blob(property->dev, value); 4784 if (blob) { 4785 *ref = &blob->base; 4786 return true; 4787 } else { 4788 return false; 4789 } 4790 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4791 /* a zero value for an object property translates to null: */ 4792 if (value == 0) 4793 return true; 4794 4795 /* handle refcnt'd objects specially: */ 4796 if (property->values[0] == DRM_MODE_OBJECT_FB) { 4797 struct drm_framebuffer *fb; 4798 fb = drm_framebuffer_lookup(property->dev, value); 4799 if (fb) { 4800 *ref = &fb->base; 4801 return true; 4802 } else { 4803 return false; 4804 } 4805 } else { 4806 return _object_find(property->dev, value, property->values[0]) != NULL; 4807 } 4808 } 4809 4810 for (i = 0; i < property->num_values; i++) 4811 if (property->values[i] == value) 4812 return true; 4813 return false; 4814 } 4815 4816 void drm_property_change_valid_put(struct drm_property *property, 4817 struct drm_mode_object *ref) 4818 { 4819 if (!ref) 4820 return; 4821 4822 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4823 if (property->values[0] == DRM_MODE_OBJECT_FB) 4824 drm_framebuffer_unreference(obj_to_fb(ref)); 4825 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4826 drm_property_unreference_blob(obj_to_blob(ref)); 4827 } 4828 4829 /** 4830 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4831 * @dev: DRM device 4832 * @data: ioctl data 4833 * @file_priv: DRM file info 4834 * 4835 * This function sets the current value for a connectors's property. It also 4836 * calls into a driver's ->set_property callback to update the hardware state 4837 * 4838 * Called by the user via ioctl. 4839 * 4840 * Returns: 4841 * Zero on success, negative errno on failure. 4842 */ 4843 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4844 void *data, struct drm_file *file_priv) 4845 { 4846 struct drm_mode_connector_set_property *conn_set_prop = data; 4847 struct drm_mode_obj_set_property obj_set_prop = { 4848 .value = conn_set_prop->value, 4849 .prop_id = conn_set_prop->prop_id, 4850 .obj_id = conn_set_prop->connector_id, 4851 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4852 }; 4853 4854 /* It does all the locking and checking we need */ 4855 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4856 } 4857 4858 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4859 struct drm_property *property, 4860 uint64_t value) 4861 { 4862 int ret = -EINVAL; 4863 struct drm_connector *connector = obj_to_connector(obj); 4864 4865 /* Do DPMS ourselves */ 4866 if (property == connector->dev->mode_config.dpms_property) { 4867 ret = 0; 4868 if (connector->funcs->dpms) 4869 ret = (*connector->funcs->dpms)(connector, (int)value); 4870 } else if (connector->funcs->set_property) 4871 ret = connector->funcs->set_property(connector, property, value); 4872 4873 /* store the property value if successful */ 4874 if (!ret) 4875 drm_object_property_set_value(&connector->base, property, value); 4876 return ret; 4877 } 4878 4879 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4880 struct drm_property *property, 4881 uint64_t value) 4882 { 4883 int ret = -EINVAL; 4884 struct drm_crtc *crtc = obj_to_crtc(obj); 4885 4886 if (crtc->funcs->set_property) 4887 ret = crtc->funcs->set_property(crtc, property, value); 4888 if (!ret) 4889 drm_object_property_set_value(obj, property, value); 4890 4891 return ret; 4892 } 4893 4894 /** 4895 * drm_mode_plane_set_obj_prop - set the value of a property 4896 * @plane: drm plane object to set property value for 4897 * @property: property to set 4898 * @value: value the property should be set to 4899 * 4900 * This functions sets a given property on a given plane object. This function 4901 * calls the driver's ->set_property callback and changes the software state of 4902 * the property if the callback succeeds. 4903 * 4904 * Returns: 4905 * Zero on success, error code on failure. 4906 */ 4907 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4908 struct drm_property *property, 4909 uint64_t value) 4910 { 4911 int ret = -EINVAL; 4912 struct drm_mode_object *obj = &plane->base; 4913 4914 if (plane->funcs->set_property) 4915 ret = plane->funcs->set_property(plane, property, value); 4916 if (!ret) 4917 drm_object_property_set_value(obj, property, value); 4918 4919 return ret; 4920 } 4921 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4922 4923 /** 4924 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 4925 * @dev: DRM device 4926 * @data: ioctl data 4927 * @file_priv: DRM file info 4928 * 4929 * This function retrieves the current value for an object's property. Compared 4930 * to the connector specific ioctl this one is extended to also work on crtc and 4931 * plane objects. 4932 * 4933 * Called by the user via ioctl. 4934 * 4935 * Returns: 4936 * Zero on success, negative errno on failure. 4937 */ 4938 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4939 struct drm_file *file_priv) 4940 { 4941 struct drm_mode_obj_get_properties *arg = data; 4942 struct drm_mode_object *obj; 4943 int ret = 0; 4944 4945 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4946 return -EINVAL; 4947 4948 drm_modeset_lock_all(dev); 4949 4950 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4951 if (!obj) { 4952 ret = -ENOENT; 4953 goto out; 4954 } 4955 if (!obj->properties) { 4956 ret = -EINVAL; 4957 goto out; 4958 } 4959 4960 ret = get_properties(obj, file_priv->atomic, 4961 (uint32_t __user *)(unsigned long)(arg->props_ptr), 4962 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), 4963 &arg->count_props); 4964 4965 out: 4966 drm_modeset_unlock_all(dev); 4967 return ret; 4968 } 4969 4970 /** 4971 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 4972 * @dev: DRM device 4973 * @data: ioctl data 4974 * @file_priv: DRM file info 4975 * 4976 * This function sets the current value for an object's property. It also calls 4977 * into a driver's ->set_property callback to update the hardware state. 4978 * Compared to the connector specific ioctl this one is extended to also work on 4979 * crtc and plane objects. 4980 * 4981 * Called by the user via ioctl. 4982 * 4983 * Returns: 4984 * Zero on success, negative errno on failure. 4985 */ 4986 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 4987 struct drm_file *file_priv) 4988 { 4989 struct drm_mode_obj_set_property *arg = data; 4990 struct drm_mode_object *arg_obj; 4991 struct drm_mode_object *prop_obj; 4992 struct drm_property *property; 4993 int i, ret = -EINVAL; 4994 struct drm_mode_object *ref; 4995 4996 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4997 return -EINVAL; 4998 4999 drm_modeset_lock_all(dev); 5000 5001 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 5002 if (!arg_obj) { 5003 ret = -ENOENT; 5004 goto out; 5005 } 5006 if (!arg_obj->properties) 5007 goto out; 5008 5009 for (i = 0; i < arg_obj->properties->count; i++) 5010 if (arg_obj->properties->properties[i]->base.id == arg->prop_id) 5011 break; 5012 5013 if (i == arg_obj->properties->count) 5014 goto out; 5015 5016 prop_obj = drm_mode_object_find(dev, arg->prop_id, 5017 DRM_MODE_OBJECT_PROPERTY); 5018 if (!prop_obj) { 5019 ret = -ENOENT; 5020 goto out; 5021 } 5022 property = obj_to_property(prop_obj); 5023 5024 if (!drm_property_change_valid_get(property, arg->value, &ref)) 5025 goto out; 5026 5027 switch (arg_obj->type) { 5028 case DRM_MODE_OBJECT_CONNECTOR: 5029 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 5030 arg->value); 5031 break; 5032 case DRM_MODE_OBJECT_CRTC: 5033 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 5034 break; 5035 case DRM_MODE_OBJECT_PLANE: 5036 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 5037 property, arg->value); 5038 break; 5039 } 5040 5041 drm_property_change_valid_put(property, ref); 5042 5043 out: 5044 drm_modeset_unlock_all(dev); 5045 return ret; 5046 } 5047 5048 /** 5049 * drm_mode_connector_attach_encoder - attach a connector to an encoder 5050 * @connector: connector to attach 5051 * @encoder: encoder to attach @connector to 5052 * 5053 * This function links up a connector to an encoder. Note that the routing 5054 * restrictions between encoders and crtcs are exposed to userspace through the 5055 * possible_clones and possible_crtcs bitmasks. 5056 * 5057 * Returns: 5058 * Zero on success, negative errno on failure. 5059 */ 5060 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 5061 struct drm_encoder *encoder) 5062 { 5063 int i; 5064 5065 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 5066 if (connector->encoder_ids[i] == 0) { 5067 connector->encoder_ids[i] = encoder->base.id; 5068 return 0; 5069 } 5070 } 5071 return -ENOMEM; 5072 } 5073 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 5074 5075 /** 5076 * drm_mode_crtc_set_gamma_size - set the gamma table size 5077 * @crtc: CRTC to set the gamma table size for 5078 * @gamma_size: size of the gamma table 5079 * 5080 * Drivers which support gamma tables should set this to the supported gamma 5081 * table size when initializing the CRTC. Currently the drm core only supports a 5082 * fixed gamma table size. 5083 * 5084 * Returns: 5085 * Zero on success, negative errno on failure. 5086 */ 5087 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 5088 int gamma_size) 5089 { 5090 crtc->gamma_size = gamma_size; 5091 5092 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, 5093 GFP_KERNEL); 5094 if (!crtc->gamma_store) { 5095 crtc->gamma_size = 0; 5096 return -ENOMEM; 5097 } 5098 5099 return 0; 5100 } 5101 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 5102 5103 /** 5104 * drm_mode_gamma_set_ioctl - set the gamma table 5105 * @dev: DRM device 5106 * @data: ioctl data 5107 * @file_priv: DRM file info 5108 * 5109 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 5110 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 5111 * 5112 * Called by the user via ioctl. 5113 * 5114 * Returns: 5115 * Zero on success, negative errno on failure. 5116 */ 5117 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 5118 void *data, struct drm_file *file_priv) 5119 { 5120 struct drm_mode_crtc_lut *crtc_lut = data; 5121 struct drm_crtc *crtc; 5122 void *r_base, *g_base, *b_base; 5123 int size; 5124 int ret = 0; 5125 5126 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5127 return -EINVAL; 5128 5129 drm_modeset_lock_all(dev); 5130 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5131 if (!crtc) { 5132 ret = -ENOENT; 5133 goto out; 5134 } 5135 5136 if (crtc->funcs->gamma_set == NULL) { 5137 ret = -ENOSYS; 5138 goto out; 5139 } 5140 5141 /* memcpy into gamma store */ 5142 if (crtc_lut->gamma_size != crtc->gamma_size) { 5143 ret = -EINVAL; 5144 goto out; 5145 } 5146 5147 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5148 r_base = crtc->gamma_store; 5149 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 5150 ret = -EFAULT; 5151 goto out; 5152 } 5153 5154 g_base = r_base + size; 5155 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 5156 ret = -EFAULT; 5157 goto out; 5158 } 5159 5160 b_base = g_base + size; 5161 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 5162 ret = -EFAULT; 5163 goto out; 5164 } 5165 5166 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 5167 5168 out: 5169 drm_modeset_unlock_all(dev); 5170 return ret; 5171 5172 } 5173 5174 /** 5175 * drm_mode_gamma_get_ioctl - get the gamma table 5176 * @dev: DRM device 5177 * @data: ioctl data 5178 * @file_priv: DRM file info 5179 * 5180 * Copy the current gamma table into the storage provided. This also provides 5181 * the gamma table size the driver expects, which can be used to size the 5182 * allocated storage. 5183 * 5184 * Called by the user via ioctl. 5185 * 5186 * Returns: 5187 * Zero on success, negative errno on failure. 5188 */ 5189 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 5190 void *data, struct drm_file *file_priv) 5191 { 5192 struct drm_mode_crtc_lut *crtc_lut = data; 5193 struct drm_crtc *crtc; 5194 void *r_base, *g_base, *b_base; 5195 int size; 5196 int ret = 0; 5197 5198 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5199 return -EINVAL; 5200 5201 drm_modeset_lock_all(dev); 5202 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5203 if (!crtc) { 5204 ret = -ENOENT; 5205 goto out; 5206 } 5207 5208 /* memcpy into gamma store */ 5209 if (crtc_lut->gamma_size != crtc->gamma_size) { 5210 ret = -EINVAL; 5211 goto out; 5212 } 5213 5214 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5215 r_base = crtc->gamma_store; 5216 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 5217 ret = -EFAULT; 5218 goto out; 5219 } 5220 5221 g_base = r_base + size; 5222 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 5223 ret = -EFAULT; 5224 goto out; 5225 } 5226 5227 b_base = g_base + size; 5228 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 5229 ret = -EFAULT; 5230 goto out; 5231 } 5232 out: 5233 drm_modeset_unlock_all(dev); 5234 return ret; 5235 } 5236 5237 /** 5238 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 5239 * @dev: DRM device 5240 * @data: ioctl data 5241 * @file_priv: DRM file info 5242 * 5243 * This schedules an asynchronous update on a given CRTC, called page flip. 5244 * Optionally a drm event is generated to signal the completion of the event. 5245 * Generic drivers cannot assume that a pageflip with changed framebuffer 5246 * properties (including driver specific metadata like tiling layout) will work, 5247 * but some drivers support e.g. pixel format changes through the pageflip 5248 * ioctl. 5249 * 5250 * Called by the user via ioctl. 5251 * 5252 * Returns: 5253 * Zero on success, negative errno on failure. 5254 */ 5255 int drm_mode_page_flip_ioctl(struct drm_device *dev, 5256 void *data, struct drm_file *file_priv) 5257 { 5258 struct drm_mode_crtc_page_flip *page_flip = data; 5259 struct drm_crtc *crtc; 5260 struct drm_framebuffer *fb = NULL; 5261 struct drm_pending_vblank_event *e = NULL; 5262 unsigned long flags; 5263 int ret = -EINVAL; 5264 5265 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5266 return -EINVAL; 5267 5268 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 5269 page_flip->reserved != 0) 5270 return -EINVAL; 5271 5272 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 5273 return -EINVAL; 5274 5275 crtc = drm_crtc_find(dev, page_flip->crtc_id); 5276 if (!crtc) 5277 return -ENOENT; 5278 5279 drm_modeset_lock_crtc(crtc, crtc->primary); 5280 if (crtc->primary->fb == NULL) { 5281 /* The framebuffer is currently unbound, presumably 5282 * due to a hotplug event, that userspace has not 5283 * yet discovered. 5284 */ 5285 ret = -EBUSY; 5286 goto out; 5287 } 5288 5289 if (crtc->funcs->page_flip == NULL) 5290 goto out; 5291 5292 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 5293 if (!fb) { 5294 ret = -ENOENT; 5295 goto out; 5296 } 5297 5298 if (crtc->state) { 5299 const struct drm_plane_state *state = crtc->primary->state; 5300 5301 ret = check_src_coords(state->src_x, state->src_y, 5302 state->src_w, state->src_h, fb); 5303 } else { 5304 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 5305 } 5306 if (ret) 5307 goto out; 5308 5309 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 5310 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 5311 ret = -EINVAL; 5312 goto out; 5313 } 5314 5315 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5316 ret = -ENOMEM; 5317 spin_lock_irqsave(&dev->event_lock, flags); 5318 if (file_priv->event_space < sizeof(e->event)) { 5319 spin_unlock_irqrestore(&dev->event_lock, flags); 5320 goto out; 5321 } 5322 file_priv->event_space -= sizeof(e->event); 5323 spin_unlock_irqrestore(&dev->event_lock, flags); 5324 5325 e = kzalloc(sizeof(*e), GFP_KERNEL); 5326 if (e == NULL) { 5327 spin_lock_irqsave(&dev->event_lock, flags); 5328 file_priv->event_space += sizeof(e->event); 5329 spin_unlock_irqrestore(&dev->event_lock, flags); 5330 goto out; 5331 } 5332 5333 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 5334 e->event.base.length = sizeof(e->event); 5335 e->event.user_data = page_flip->user_data; 5336 e->base.event = &e->event.base; 5337 e->base.file_priv = file_priv; 5338 e->base.destroy = 5339 (void (*) (struct drm_pending_event *)) kfree; 5340 } 5341 5342 crtc->primary->old_fb = crtc->primary->fb; 5343 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 5344 if (ret) { 5345 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5346 spin_lock_irqsave(&dev->event_lock, flags); 5347 file_priv->event_space += sizeof(e->event); 5348 spin_unlock_irqrestore(&dev->event_lock, flags); 5349 kfree(e); 5350 } 5351 /* Keep the old fb, don't unref it. */ 5352 crtc->primary->old_fb = NULL; 5353 } else { 5354 crtc->primary->fb = fb; 5355 /* Unref only the old framebuffer. */ 5356 fb = NULL; 5357 } 5358 5359 out: 5360 if (fb) 5361 drm_framebuffer_unreference(fb); 5362 if (crtc->primary->old_fb) 5363 drm_framebuffer_unreference(crtc->primary->old_fb); 5364 crtc->primary->old_fb = NULL; 5365 drm_modeset_unlock_crtc(crtc); 5366 5367 return ret; 5368 } 5369 5370 /** 5371 * drm_mode_config_reset - call ->reset callbacks 5372 * @dev: drm device 5373 * 5374 * This functions calls all the crtc's, encoder's and connector's ->reset 5375 * callback. Drivers can use this in e.g. their driver load or resume code to 5376 * reset hardware and software state. 5377 */ 5378 void drm_mode_config_reset(struct drm_device *dev) 5379 { 5380 struct drm_crtc *crtc; 5381 struct drm_plane *plane; 5382 struct drm_encoder *encoder; 5383 struct drm_connector *connector; 5384 5385 drm_for_each_plane(plane, dev) 5386 if (plane->funcs->reset) 5387 plane->funcs->reset(plane); 5388 5389 drm_for_each_crtc(crtc, dev) 5390 if (crtc->funcs->reset) 5391 crtc->funcs->reset(crtc); 5392 5393 drm_for_each_encoder(encoder, dev) 5394 if (encoder->funcs->reset) 5395 encoder->funcs->reset(encoder); 5396 5397 mutex_lock(&dev->mode_config.mutex); 5398 drm_for_each_connector(connector, dev) 5399 if (connector->funcs->reset) 5400 connector->funcs->reset(connector); 5401 mutex_unlock(&dev->mode_config.mutex); 5402 } 5403 EXPORT_SYMBOL(drm_mode_config_reset); 5404 5405 /** 5406 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 5407 * @dev: DRM device 5408 * @data: ioctl data 5409 * @file_priv: DRM file info 5410 * 5411 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 5412 * TTM or something else entirely) and returns the resulting buffer handle. This 5413 * handle can then be wrapped up into a framebuffer modeset object. 5414 * 5415 * Note that userspace is not allowed to use such objects for render 5416 * acceleration - drivers must create their own private ioctls for such a use 5417 * case. 5418 * 5419 * Called by the user via ioctl. 5420 * 5421 * Returns: 5422 * Zero on success, negative errno on failure. 5423 */ 5424 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 5425 void *data, struct drm_file *file_priv) 5426 { 5427 struct drm_mode_create_dumb *args = data; 5428 u32 cpp, stride, size; 5429 5430 if (!dev->driver->dumb_create) 5431 return -ENOSYS; 5432 if (!args->width || !args->height || !args->bpp) 5433 return -EINVAL; 5434 5435 /* overflow checks for 32bit size calculations */ 5436 /* NOTE: DIV_ROUND_UP() can overflow */ 5437 cpp = DIV_ROUND_UP(args->bpp, 8); 5438 if (!cpp || cpp > 0xffffffffU / args->width) 5439 return -EINVAL; 5440 stride = cpp * args->width; 5441 if (args->height > 0xffffffffU / stride) 5442 return -EINVAL; 5443 5444 /* test for wrap-around */ 5445 size = args->height * stride; 5446 if (PAGE_ALIGN(size) == 0) 5447 return -EINVAL; 5448 5449 /* 5450 * handle, pitch and size are output parameters. Zero them out to 5451 * prevent drivers from accidentally using uninitialized data. Since 5452 * not all existing userspace is clearing these fields properly we 5453 * cannot reject IOCTL with garbage in them. 5454 */ 5455 args->handle = 0; 5456 args->pitch = 0; 5457 args->size = 0; 5458 5459 return dev->driver->dumb_create(file_priv, dev, args); 5460 } 5461 5462 /** 5463 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 5464 * @dev: DRM device 5465 * @data: ioctl data 5466 * @file_priv: DRM file info 5467 * 5468 * Allocate an offset in the drm device node's address space to be able to 5469 * memory map a dumb buffer. 5470 * 5471 * Called by the user via ioctl. 5472 * 5473 * Returns: 5474 * Zero on success, negative errno on failure. 5475 */ 5476 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 5477 void *data, struct drm_file *file_priv) 5478 { 5479 struct drm_mode_map_dumb *args = data; 5480 5481 /* call driver ioctl to get mmap offset */ 5482 if (!dev->driver->dumb_map_offset) 5483 return -ENOSYS; 5484 5485 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 5486 } 5487 5488 /** 5489 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 5490 * @dev: DRM device 5491 * @data: ioctl data 5492 * @file_priv: DRM file info 5493 * 5494 * This destroys the userspace handle for the given dumb backing storage buffer. 5495 * Since buffer objects must be reference counted in the kernel a buffer object 5496 * won't be immediately freed if a framebuffer modeset object still uses it. 5497 * 5498 * Called by the user via ioctl. 5499 * 5500 * Returns: 5501 * Zero on success, negative errno on failure. 5502 */ 5503 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 5504 void *data, struct drm_file *file_priv) 5505 { 5506 struct drm_mode_destroy_dumb *args = data; 5507 5508 if (!dev->driver->dumb_destroy) 5509 return -ENOSYS; 5510 5511 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 5512 } 5513 5514 /** 5515 * drm_fb_get_bpp_depth - get the bpp/depth values for format 5516 * @format: pixel format (DRM_FORMAT_*) 5517 * @depth: storage for the depth value 5518 * @bpp: storage for the bpp value 5519 * 5520 * This only supports RGB formats here for compat with code that doesn't use 5521 * pixel formats directly yet. 5522 */ 5523 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 5524 int *bpp) 5525 { 5526 switch (format) { 5527 case DRM_FORMAT_C8: 5528 case DRM_FORMAT_RGB332: 5529 case DRM_FORMAT_BGR233: 5530 *depth = 8; 5531 *bpp = 8; 5532 break; 5533 case DRM_FORMAT_XRGB1555: 5534 case DRM_FORMAT_XBGR1555: 5535 case DRM_FORMAT_RGBX5551: 5536 case DRM_FORMAT_BGRX5551: 5537 case DRM_FORMAT_ARGB1555: 5538 case DRM_FORMAT_ABGR1555: 5539 case DRM_FORMAT_RGBA5551: 5540 case DRM_FORMAT_BGRA5551: 5541 *depth = 15; 5542 *bpp = 16; 5543 break; 5544 case DRM_FORMAT_RGB565: 5545 case DRM_FORMAT_BGR565: 5546 *depth = 16; 5547 *bpp = 16; 5548 break; 5549 case DRM_FORMAT_RGB888: 5550 case DRM_FORMAT_BGR888: 5551 *depth = 24; 5552 *bpp = 24; 5553 break; 5554 case DRM_FORMAT_XRGB8888: 5555 case DRM_FORMAT_XBGR8888: 5556 case DRM_FORMAT_RGBX8888: 5557 case DRM_FORMAT_BGRX8888: 5558 *depth = 24; 5559 *bpp = 32; 5560 break; 5561 case DRM_FORMAT_XRGB2101010: 5562 case DRM_FORMAT_XBGR2101010: 5563 case DRM_FORMAT_RGBX1010102: 5564 case DRM_FORMAT_BGRX1010102: 5565 case DRM_FORMAT_ARGB2101010: 5566 case DRM_FORMAT_ABGR2101010: 5567 case DRM_FORMAT_RGBA1010102: 5568 case DRM_FORMAT_BGRA1010102: 5569 *depth = 30; 5570 *bpp = 32; 5571 break; 5572 case DRM_FORMAT_ARGB8888: 5573 case DRM_FORMAT_ABGR8888: 5574 case DRM_FORMAT_RGBA8888: 5575 case DRM_FORMAT_BGRA8888: 5576 *depth = 32; 5577 *bpp = 32; 5578 break; 5579 default: 5580 DRM_DEBUG_KMS("unsupported pixel format %s\n", 5581 drm_get_format_name(format)); 5582 *depth = 0; 5583 *bpp = 0; 5584 break; 5585 } 5586 } 5587 EXPORT_SYMBOL(drm_fb_get_bpp_depth); 5588 5589 /** 5590 * drm_format_num_planes - get the number of planes for format 5591 * @format: pixel format (DRM_FORMAT_*) 5592 * 5593 * Returns: 5594 * The number of planes used by the specified pixel format. 5595 */ 5596 int drm_format_num_planes(uint32_t format) 5597 { 5598 switch (format) { 5599 case DRM_FORMAT_YUV410: 5600 case DRM_FORMAT_YVU410: 5601 case DRM_FORMAT_YUV411: 5602 case DRM_FORMAT_YVU411: 5603 case DRM_FORMAT_YUV420: 5604 case DRM_FORMAT_YVU420: 5605 case DRM_FORMAT_YUV422: 5606 case DRM_FORMAT_YVU422: 5607 case DRM_FORMAT_YUV444: 5608 case DRM_FORMAT_YVU444: 5609 return 3; 5610 case DRM_FORMAT_NV12: 5611 case DRM_FORMAT_NV21: 5612 case DRM_FORMAT_NV16: 5613 case DRM_FORMAT_NV61: 5614 case DRM_FORMAT_NV24: 5615 case DRM_FORMAT_NV42: 5616 return 2; 5617 default: 5618 return 1; 5619 } 5620 } 5621 EXPORT_SYMBOL(drm_format_num_planes); 5622 5623 /** 5624 * drm_format_plane_cpp - determine the bytes per pixel value 5625 * @format: pixel format (DRM_FORMAT_*) 5626 * @plane: plane index 5627 * 5628 * Returns: 5629 * The bytes per pixel value for the specified plane. 5630 */ 5631 int drm_format_plane_cpp(uint32_t format, int plane) 5632 { 5633 unsigned int depth; 5634 int bpp; 5635 5636 if (plane >= drm_format_num_planes(format)) 5637 return 0; 5638 5639 switch (format) { 5640 case DRM_FORMAT_YUYV: 5641 case DRM_FORMAT_YVYU: 5642 case DRM_FORMAT_UYVY: 5643 case DRM_FORMAT_VYUY: 5644 return 2; 5645 case DRM_FORMAT_NV12: 5646 case DRM_FORMAT_NV21: 5647 case DRM_FORMAT_NV16: 5648 case DRM_FORMAT_NV61: 5649 case DRM_FORMAT_NV24: 5650 case DRM_FORMAT_NV42: 5651 return plane ? 2 : 1; 5652 case DRM_FORMAT_YUV410: 5653 case DRM_FORMAT_YVU410: 5654 case DRM_FORMAT_YUV411: 5655 case DRM_FORMAT_YVU411: 5656 case DRM_FORMAT_YUV420: 5657 case DRM_FORMAT_YVU420: 5658 case DRM_FORMAT_YUV422: 5659 case DRM_FORMAT_YVU422: 5660 case DRM_FORMAT_YUV444: 5661 case DRM_FORMAT_YVU444: 5662 return 1; 5663 default: 5664 drm_fb_get_bpp_depth(format, &depth, &bpp); 5665 return bpp >> 3; 5666 } 5667 } 5668 EXPORT_SYMBOL(drm_format_plane_cpp); 5669 5670 /** 5671 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 5672 * @format: pixel format (DRM_FORMAT_*) 5673 * 5674 * Returns: 5675 * The horizontal chroma subsampling factor for the 5676 * specified pixel format. 5677 */ 5678 int drm_format_horz_chroma_subsampling(uint32_t format) 5679 { 5680 switch (format) { 5681 case DRM_FORMAT_YUV411: 5682 case DRM_FORMAT_YVU411: 5683 case DRM_FORMAT_YUV410: 5684 case DRM_FORMAT_YVU410: 5685 return 4; 5686 case DRM_FORMAT_YUYV: 5687 case DRM_FORMAT_YVYU: 5688 case DRM_FORMAT_UYVY: 5689 case DRM_FORMAT_VYUY: 5690 case DRM_FORMAT_NV12: 5691 case DRM_FORMAT_NV21: 5692 case DRM_FORMAT_NV16: 5693 case DRM_FORMAT_NV61: 5694 case DRM_FORMAT_YUV422: 5695 case DRM_FORMAT_YVU422: 5696 case DRM_FORMAT_YUV420: 5697 case DRM_FORMAT_YVU420: 5698 return 2; 5699 default: 5700 return 1; 5701 } 5702 } 5703 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5704 5705 /** 5706 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5707 * @format: pixel format (DRM_FORMAT_*) 5708 * 5709 * Returns: 5710 * The vertical chroma subsampling factor for the 5711 * specified pixel format. 5712 */ 5713 int drm_format_vert_chroma_subsampling(uint32_t format) 5714 { 5715 switch (format) { 5716 case DRM_FORMAT_YUV410: 5717 case DRM_FORMAT_YVU410: 5718 return 4; 5719 case DRM_FORMAT_YUV420: 5720 case DRM_FORMAT_YVU420: 5721 case DRM_FORMAT_NV12: 5722 case DRM_FORMAT_NV21: 5723 return 2; 5724 default: 5725 return 1; 5726 } 5727 } 5728 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5729 5730 /** 5731 * drm_rotation_simplify() - Try to simplify the rotation 5732 * @rotation: Rotation to be simplified 5733 * @supported_rotations: Supported rotations 5734 * 5735 * Attempt to simplify the rotation to a form that is supported. 5736 * Eg. if the hardware supports everything except DRM_REFLECT_X 5737 * one could call this function like this: 5738 * 5739 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5740 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5741 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5742 * 5743 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5744 * transforms the hardware supports, this function may not 5745 * be able to produce a supported transform, so the caller should 5746 * check the result afterwards. 5747 */ 5748 unsigned int drm_rotation_simplify(unsigned int rotation, 5749 unsigned int supported_rotations) 5750 { 5751 if (rotation & ~supported_rotations) { 5752 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5753 rotation = (rotation & DRM_REFLECT_MASK) | 5754 BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4); 5755 } 5756 5757 return rotation; 5758 } 5759 EXPORT_SYMBOL(drm_rotation_simplify); 5760 5761 /** 5762 * drm_mode_config_init - initialize DRM mode_configuration structure 5763 * @dev: DRM device 5764 * 5765 * Initialize @dev's mode_config structure, used for tracking the graphics 5766 * configuration of @dev. 5767 * 5768 * Since this initializes the modeset locks, no locking is possible. Which is no 5769 * problem, since this should happen single threaded at init time. It is the 5770 * driver's problem to ensure this guarantee. 5771 * 5772 */ 5773 void drm_mode_config_init(struct drm_device *dev) 5774 { 5775 #ifdef __NetBSD__ 5776 linux_mutex_init(&dev->mode_config.mutex); 5777 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5778 linux_mutex_init(&dev->mode_config.idr_mutex); 5779 linux_mutex_init(&dev->mode_config.fb_lock); 5780 linux_mutex_init(&dev->mode_config.blob_lock); 5781 #else 5782 mutex_init(&dev->mode_config.mutex); 5783 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5784 mutex_init(&dev->mode_config.idr_mutex); 5785 mutex_init(&dev->mode_config.fb_lock); 5786 mutex_init(&dev->mode_config.blob_lock); 5787 #endif 5788 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5789 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5790 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5791 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5792 INIT_LIST_HEAD(&dev->mode_config.property_list); 5793 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5794 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5795 idr_init(&dev->mode_config.crtc_idr); 5796 idr_init(&dev->mode_config.tile_idr); 5797 5798 drm_modeset_lock_all(dev); 5799 drm_mode_create_standard_properties(dev); 5800 drm_modeset_unlock_all(dev); 5801 5802 /* Just to be sure */ 5803 dev->mode_config.num_fb = 0; 5804 dev->mode_config.num_connector = 0; 5805 dev->mode_config.num_crtc = 0; 5806 dev->mode_config.num_encoder = 0; 5807 dev->mode_config.num_overlay_plane = 0; 5808 dev->mode_config.num_total_plane = 0; 5809 } 5810 EXPORT_SYMBOL(drm_mode_config_init); 5811 5812 /** 5813 * drm_mode_config_cleanup - free up DRM mode_config info 5814 * @dev: DRM device 5815 * 5816 * Free up all the connectors and CRTCs associated with this DRM device, then 5817 * free up the framebuffers and associated buffer objects. 5818 * 5819 * Note that since this /should/ happen single-threaded at driver/device 5820 * teardown time, no locking is required. It's the driver's job to ensure that 5821 * this guarantee actually holds true. 5822 * 5823 * FIXME: cleanup any dangling user buffer objects too 5824 */ 5825 void drm_mode_config_cleanup(struct drm_device *dev) 5826 { 5827 struct drm_connector *connector, *ot; 5828 struct drm_crtc *crtc, *ct; 5829 struct drm_encoder *encoder, *enct; 5830 struct drm_framebuffer *fb, *fbt; 5831 struct drm_property *property, *pt; 5832 struct drm_property_blob *blob, *bt; 5833 struct drm_plane *plane, *plt; 5834 5835 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5836 head) { 5837 encoder->funcs->destroy(encoder); 5838 } 5839 5840 list_for_each_entry_safe(connector, ot, 5841 &dev->mode_config.connector_list, head) { 5842 connector->funcs->destroy(connector); 5843 } 5844 5845 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5846 head) { 5847 drm_property_destroy(dev, property); 5848 } 5849 5850 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5851 head_global) { 5852 drm_property_unreference_blob(blob); 5853 } 5854 5855 /* 5856 * Single-threaded teardown context, so it's not required to grab the 5857 * fb_lock to protect against concurrent fb_list access. Contrary, it 5858 * would actually deadlock with the drm_framebuffer_cleanup function. 5859 * 5860 * Also, if there are any framebuffers left, that's a driver leak now, 5861 * so politely WARN about this. 5862 */ 5863 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5864 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5865 drm_framebuffer_free(&fb->refcount); 5866 } 5867 5868 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5869 head) { 5870 plane->funcs->destroy(plane); 5871 } 5872 5873 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5874 crtc->funcs->destroy(crtc); 5875 } 5876 5877 idr_destroy(&dev->mode_config.tile_idr); 5878 idr_destroy(&dev->mode_config.crtc_idr); 5879 #ifdef __NetBSD__ 5880 linux_mutex_destroy(&dev->mode_config.blob_lock); 5881 linux_mutex_destroy(&dev->mode_config.fb_lock); 5882 linux_mutex_destroy(&dev->mode_config.idr_mutex); 5883 linux_mutex_destroy(&dev->mode_config.mutex); 5884 #endif 5885 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5886 } 5887 EXPORT_SYMBOL(drm_mode_config_cleanup); 5888 5889 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5890 unsigned int supported_rotations) 5891 { 5892 static const struct drm_prop_enum_list props[] = { 5893 { DRM_ROTATE_0, "rotate-0" }, 5894 { DRM_ROTATE_90, "rotate-90" }, 5895 { DRM_ROTATE_180, "rotate-180" }, 5896 { DRM_ROTATE_270, "rotate-270" }, 5897 { DRM_REFLECT_X, "reflect-x" }, 5898 { DRM_REFLECT_Y, "reflect-y" }, 5899 }; 5900 5901 return drm_property_create_bitmask(dev, 0, "rotation", 5902 props, ARRAY_SIZE(props), 5903 supported_rotations); 5904 } 5905 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5906 5907 /** 5908 * DOC: Tile group 5909 * 5910 * Tile groups are used to represent tiled monitors with a unique 5911 * integer identifier. Tiled monitors using DisplayID v1.3 have 5912 * a unique 8-byte handle, we store this in a tile group, so we 5913 * have a common identifier for all tiles in a monitor group. 5914 */ 5915 static void drm_tile_group_free(struct kref *kref) 5916 { 5917 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5918 struct drm_device *dev = tg->dev; 5919 mutex_lock(&dev->mode_config.idr_mutex); 5920 idr_remove(&dev->mode_config.tile_idr, tg->id); 5921 mutex_unlock(&dev->mode_config.idr_mutex); 5922 kfree(tg); 5923 } 5924 5925 /** 5926 * drm_mode_put_tile_group - drop a reference to a tile group. 5927 * @dev: DRM device 5928 * @tg: tile group to drop reference to. 5929 * 5930 * drop reference to tile group and free if 0. 5931 */ 5932 void drm_mode_put_tile_group(struct drm_device *dev, 5933 struct drm_tile_group *tg) 5934 { 5935 kref_put(&tg->refcount, drm_tile_group_free); 5936 } 5937 5938 /** 5939 * drm_mode_get_tile_group - get a reference to an existing tile group 5940 * @dev: DRM device 5941 * @topology: 8-bytes unique per monitor. 5942 * 5943 * Use the unique bytes to get a reference to an existing tile group. 5944 * 5945 * RETURNS: 5946 * tile group or NULL if not found. 5947 */ 5948 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 5949 char topology[8]) 5950 { 5951 struct drm_tile_group *tg; 5952 int id; 5953 mutex_lock(&dev->mode_config.idr_mutex); 5954 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 5955 if (!memcmp(tg->group_data, topology, 8)) { 5956 if (!kref_get_unless_zero(&tg->refcount)) 5957 tg = NULL; 5958 mutex_unlock(&dev->mode_config.idr_mutex); 5959 return tg; 5960 } 5961 } 5962 mutex_unlock(&dev->mode_config.idr_mutex); 5963 return NULL; 5964 } 5965 EXPORT_SYMBOL(drm_mode_get_tile_group); 5966 5967 /** 5968 * drm_mode_create_tile_group - create a tile group from a displayid description 5969 * @dev: DRM device 5970 * @topology: 8-bytes unique per monitor. 5971 * 5972 * Create a tile group for the unique monitor, and get a unique 5973 * identifier for the tile group. 5974 * 5975 * RETURNS: 5976 * new tile group or error. 5977 */ 5978 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 5979 char topology[8]) 5980 { 5981 struct drm_tile_group *tg; 5982 int ret; 5983 5984 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 5985 if (!tg) 5986 return ERR_PTR(-ENOMEM); 5987 5988 kref_init(&tg->refcount); 5989 memcpy(tg->group_data, topology, 8); 5990 tg->dev = dev; 5991 5992 idr_preload(GFP_KERNEL); 5993 mutex_lock(&dev->mode_config.idr_mutex); 5994 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 5995 if (ret >= 0) { 5996 tg->id = ret; 5997 } else { 5998 kfree(tg); 5999 tg = ERR_PTR(ret); 6000 } 6001 6002 mutex_unlock(&dev->mode_config.idr_mutex); 6003 idr_preload_end(); 6004 return tg; 6005 } 6006 EXPORT_SYMBOL(drm_mode_create_tile_group); 6007
Indexes created Sun Sep 28 07:09:56 GMT 2025