1 /* $NetBSD: drm_crtc.c,v 1.17 2020/06/27 13:39:05 jmcneill Exp $ */ 2 3 /* 4 * Copyright (c) 2006-2008 Intel Corporation 5 * Copyright (c) 2007 Dave Airlie <airlied@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@anholt.net> 31 * Dave Airlie <airlied@linux.ie> 32 * Jesse Barnes <jesse.barnes@intel.com> 33 */ 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: drm_crtc.c,v 1.17 2020/06/27 13:39:05 jmcneill Exp $"); 36 37 #include <linux/ctype.h> 38 #include <linux/list.h> 39 #include <linux/slab.h> 40 #include <linux/export.h> 41 #include <drm/drmP.h> 42 #include <drm/drm_crtc.h> 43 #include <drm/drm_edid.h> 44 #include <drm/drm_fourcc.h> 45 #include <drm/drm_modeset_lock.h> 46 #include <drm/drm_atomic.h> 47 48 #include "drm_crtc_internal.h" 49 #include "drm_internal.h" 50 51 #include <linux/nbsd-namespace.h> 52 53 static struct drm_framebuffer * 54 internal_framebuffer_create(struct drm_device *dev, 55 struct drm_mode_fb_cmd2 *r, 56 struct drm_file *file_priv); 57 58 /* Avoid boilerplate. I'm tired of typing. */ 59 #define DRM_ENUM_NAME_FN(fnname, list) \ 60 const char *fnname(int val) \ 61 { \ 62 int i; \ 63 for (i = 0; i < ARRAY_SIZE(list); i++) { \ 64 if (list[i].type == val) \ 65 return list[i].name; \ 66 } \ 67 return "(unknown)"; \ 68 } 69 70 /* 71 * Global properties 72 */ 73 static const struct drm_prop_enum_list drm_dpms_enum_list[] = { 74 { DRM_MODE_DPMS_ON, "On" }, 75 { DRM_MODE_DPMS_STANDBY, "Standby" }, 76 { DRM_MODE_DPMS_SUSPEND, "Suspend" }, 77 { DRM_MODE_DPMS_OFF, "Off" } 78 }; 79 80 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) 81 82 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { 83 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 84 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 85 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 86 }; 87 88 /* 89 * Optional properties 90 */ 91 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { 92 { DRM_MODE_SCALE_NONE, "None" }, 93 { DRM_MODE_SCALE_FULLSCREEN, "Full" }, 94 { DRM_MODE_SCALE_CENTER, "Center" }, 95 { DRM_MODE_SCALE_ASPECT, "Full aspect" }, 96 }; 97 98 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { 99 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, 100 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, 101 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, 102 }; 103 104 /* 105 * Non-global properties, but "required" for certain connectors. 106 */ 107 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { 108 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 109 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 110 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 111 }; 112 113 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) 114 115 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { 116 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 117 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 118 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 119 }; 120 121 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, 122 drm_dvi_i_subconnector_enum_list) 123 124 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { 125 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 126 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 127 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 128 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 129 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 130 }; 131 132 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) 133 134 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { 135 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 136 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 137 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 138 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 139 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 140 }; 141 142 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, 143 drm_tv_subconnector_enum_list) 144 145 static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = { 146 { DRM_MODE_DIRTY_OFF, "Off" }, 147 { DRM_MODE_DIRTY_ON, "On" }, 148 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" }, 149 }; 150 151 struct drm_conn_prop_enum_list { 152 int type; 153 const char *name; 154 struct ida ida; 155 }; 156 157 /* 158 * Connector and encoder types. 159 */ 160 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { 161 { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, 162 { DRM_MODE_CONNECTOR_VGA, "VGA" }, 163 { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, 164 { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, 165 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, 166 { DRM_MODE_CONNECTOR_Composite, "Composite" }, 167 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, 168 { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, 169 { DRM_MODE_CONNECTOR_Component, "Component" }, 170 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, 171 { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, 172 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, 173 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, 174 { DRM_MODE_CONNECTOR_TV, "TV" }, 175 { DRM_MODE_CONNECTOR_eDP, "eDP" }, 176 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, 177 { DRM_MODE_CONNECTOR_DSI, "DSI" }, 178 }; 179 180 static const struct drm_prop_enum_list drm_encoder_enum_list[] = { 181 { DRM_MODE_ENCODER_NONE, "None" }, 182 { DRM_MODE_ENCODER_DAC, "DAC" }, 183 { DRM_MODE_ENCODER_TMDS, "TMDS" }, 184 { DRM_MODE_ENCODER_LVDS, "LVDS" }, 185 { DRM_MODE_ENCODER_TVDAC, "TV" }, 186 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" }, 187 { DRM_MODE_ENCODER_DSI, "DSI" }, 188 { DRM_MODE_ENCODER_DPMST, "DP MST" }, 189 }; 190 191 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { 192 { SubPixelUnknown, "Unknown" }, 193 { SubPixelHorizontalRGB, "Horizontal RGB" }, 194 { SubPixelHorizontalBGR, "Horizontal BGR" }, 195 { SubPixelVerticalRGB, "Vertical RGB" }, 196 { SubPixelVerticalBGR, "Vertical BGR" }, 197 { SubPixelNone, "None" }, 198 }; 199 200 void drm_connector_ida_init(void) 201 { 202 int i; 203 204 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 205 ida_init(&drm_connector_enum_list[i].ida); 206 } 207 208 void drm_connector_ida_destroy(void) 209 { 210 int i; 211 212 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 213 ida_destroy(&drm_connector_enum_list[i].ida); 214 } 215 216 /** 217 * drm_get_connector_status_name - return a string for connector status 218 * @status: connector status to compute name of 219 * 220 * In contrast to the other drm_get_*_name functions this one here returns a 221 * const pointer and hence is threadsafe. 222 */ 223 const char *drm_get_connector_status_name(enum drm_connector_status status) 224 { 225 if (status == connector_status_connected) 226 return "connected"; 227 else if (status == connector_status_disconnected) 228 return "disconnected"; 229 else 230 return "unknown"; 231 } 232 EXPORT_SYMBOL(drm_get_connector_status_name); 233 234 /** 235 * drm_get_subpixel_order_name - return a string for a given subpixel enum 236 * @order: enum of subpixel_order 237 * 238 * Note you could abuse this and return something out of bounds, but that 239 * would be a caller error. No unscrubbed user data should make it here. 240 */ 241 const char *drm_get_subpixel_order_name(enum subpixel_order order) 242 { 243 return drm_subpixel_enum_list[order].name; 244 } 245 EXPORT_SYMBOL(drm_get_subpixel_order_name); 246 247 static char printable_char(int c) 248 { 249 return isascii(c) && isprint(c) ? c : '?'; 250 } 251 252 /** 253 * drm_get_format_name - return a string for drm fourcc format 254 * @format: format to compute name of 255 * 256 * Note that the buffer used by this function is globally shared and owned by 257 * the function itself. 258 * 259 * FIXME: This isn't really multithreading safe. 260 */ 261 const char *drm_get_format_name(uint32_t format) 262 { 263 static char buf[32]; 264 265 snprintf(buf, sizeof(buf), 266 "%c%c%c%c %s-endian (0x%08x)", 267 printable_char(format & 0xff), 268 printable_char((format >> 8) & 0xff), 269 printable_char((format >> 16) & 0xff), 270 printable_char((format >> 24) & 0x7f), 271 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", 272 format); 273 274 return buf; 275 } 276 EXPORT_SYMBOL(drm_get_format_name); 277 278 /* 279 * Internal function to assign a slot in the object idr and optionally 280 * register the object into the idr. 281 */ 282 static int drm_mode_object_get_reg(struct drm_device *dev, 283 struct drm_mode_object *obj, 284 uint32_t obj_type, 285 bool register_obj) 286 { 287 int ret; 288 289 idr_preload(GFP_KERNEL); 290 mutex_lock(&dev->mode_config.idr_mutex); 291 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); 292 if (ret >= 0) { 293 /* 294 * Set up the object linking under the protection of the idr 295 * lock so that other users can't see inconsistent state. 296 */ 297 obj->id = ret; 298 obj->type = obj_type; 299 } 300 mutex_unlock(&dev->mode_config.idr_mutex); 301 idr_preload_end(); 302 303 return ret < 0 ? ret : 0; 304 } 305 306 /** 307 * drm_mode_object_get - allocate a new modeset identifier 308 * @dev: DRM device 309 * @obj: object pointer, used to generate unique ID 310 * @obj_type: object type 311 * 312 * Create a unique identifier based on @ptr in @dev's identifier space. Used 313 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix 314 * modeset identifiers are _not_ reference counted. Hence don't use this for 315 * reference counted modeset objects like framebuffers. 316 * 317 * Returns: 318 * Zero on success, error code on failure. 319 */ 320 int drm_mode_object_get(struct drm_device *dev, 321 struct drm_mode_object *obj, uint32_t obj_type) 322 { 323 return drm_mode_object_get_reg(dev, obj, obj_type, true); 324 } 325 326 static void drm_mode_object_register(struct drm_device *dev, 327 struct drm_mode_object *obj) 328 { 329 mutex_lock(&dev->mode_config.idr_mutex); 330 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); 331 mutex_unlock(&dev->mode_config.idr_mutex); 332 } 333 334 /** 335 * drm_mode_object_put - free a modeset identifer 336 * @dev: DRM device 337 * @object: object to free 338 * 339 * Free @id from @dev's unique identifier pool. Note that despite the _get 340 * postfix modeset identifiers are _not_ reference counted. Hence don't use this 341 * for reference counted modeset objects like framebuffers. 342 */ 343 void drm_mode_object_put(struct drm_device *dev, 344 struct drm_mode_object *object) 345 { 346 mutex_lock(&dev->mode_config.idr_mutex); 347 idr_remove(&dev->mode_config.crtc_idr, object->id); 348 mutex_unlock(&dev->mode_config.idr_mutex); 349 } 350 351 static struct drm_mode_object *_object_find(struct drm_device *dev, 352 uint32_t id, uint32_t type) 353 { 354 struct drm_mode_object *obj = NULL; 355 356 mutex_lock(&dev->mode_config.idr_mutex); 357 obj = idr_find(&dev->mode_config.crtc_idr, id); 358 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) 359 obj = NULL; 360 if (obj && obj->id != id) 361 obj = NULL; 362 /* don't leak out unref'd fb's */ 363 if (obj && 364 (obj->type == DRM_MODE_OBJECT_FB || 365 obj->type == DRM_MODE_OBJECT_BLOB)) 366 obj = NULL; 367 mutex_unlock(&dev->mode_config.idr_mutex); 368 369 return obj; 370 } 371 372 /** 373 * drm_mode_object_find - look up a drm object with static lifetime 374 * @dev: drm device 375 * @id: id of the mode object 376 * @type: type of the mode object 377 * 378 * Note that framebuffers cannot be looked up with this functions - since those 379 * are reference counted, they need special treatment. Even with 380 * DRM_MODE_OBJECT_ANY (although that will simply return NULL 381 * rather than WARN_ON()). 382 */ 383 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, 384 uint32_t id, uint32_t type) 385 { 386 struct drm_mode_object *obj = NULL; 387 388 /* Framebuffers are reference counted and need their own lookup 389 * function.*/ 390 WARN_ON(type == DRM_MODE_OBJECT_FB || type == DRM_MODE_OBJECT_BLOB); 391 obj = _object_find(dev, id, type); 392 return obj; 393 } 394 EXPORT_SYMBOL(drm_mode_object_find); 395 396 /** 397 * drm_framebuffer_init - initialize a framebuffer 398 * @dev: DRM device 399 * @fb: framebuffer to be initialized 400 * @funcs: ... with these functions 401 * 402 * Allocates an ID for the framebuffer's parent mode object, sets its mode 403 * functions & device file and adds it to the master fd list. 404 * 405 * IMPORTANT: 406 * This functions publishes the fb and makes it available for concurrent access 407 * by other users. Which means by this point the fb _must_ be fully set up - 408 * since all the fb attributes are invariant over its lifetime, no further 409 * locking but only correct reference counting is required. 410 * 411 * Returns: 412 * Zero on success, error code on failure. 413 */ 414 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, 415 const struct drm_framebuffer_funcs *funcs) 416 { 417 int ret; 418 419 mutex_lock(&dev->mode_config.fb_lock); 420 kref_init(&fb->refcount); 421 INIT_LIST_HEAD(&fb->filp_head); 422 fb->dev = dev; 423 fb->funcs = funcs; 424 425 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB); 426 if (ret) 427 goto out; 428 429 dev->mode_config.num_fb++; 430 list_add(&fb->head, &dev->mode_config.fb_list); 431 out: 432 mutex_unlock(&dev->mode_config.fb_lock); 433 434 return ret; 435 } 436 EXPORT_SYMBOL(drm_framebuffer_init); 437 438 /* dev->mode_config.fb_lock must be held! */ 439 static void __drm_framebuffer_unregister(struct drm_device *dev, 440 struct drm_framebuffer *fb) 441 { 442 mutex_lock(&dev->mode_config.idr_mutex); 443 idr_remove(&dev->mode_config.crtc_idr, fb->base.id); 444 mutex_unlock(&dev->mode_config.idr_mutex); 445 446 fb->base.id = 0; 447 } 448 449 static void drm_framebuffer_free(struct kref *kref) 450 { 451 struct drm_framebuffer *fb = 452 container_of(kref, struct drm_framebuffer, refcount); 453 struct drm_device *dev = fb->dev; 454 455 /* 456 * The lookup idr holds a weak reference, which has not necessarily been 457 * removed at this point. Check for that. 458 */ 459 mutex_lock(&dev->mode_config.fb_lock); 460 if (fb->base.id) { 461 /* Mark fb as reaped and drop idr ref. */ 462 __drm_framebuffer_unregister(dev, fb); 463 } 464 mutex_unlock(&dev->mode_config.fb_lock); 465 466 fb->funcs->destroy(fb); 467 } 468 469 static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev, 470 uint32_t id) 471 { 472 struct drm_mode_object *obj = NULL; 473 struct drm_framebuffer *fb; 474 475 mutex_lock(&dev->mode_config.idr_mutex); 476 obj = idr_find(&dev->mode_config.crtc_idr, id); 477 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id)) 478 fb = NULL; 479 else 480 fb = obj_to_fb(obj); 481 mutex_unlock(&dev->mode_config.idr_mutex); 482 483 return fb; 484 } 485 486 /** 487 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference 488 * @dev: drm device 489 * @id: id of the fb object 490 * 491 * If successful, this grabs an additional reference to the framebuffer - 492 * callers need to make sure to eventually unreference the returned framebuffer 493 * again, using @drm_framebuffer_unreference. 494 */ 495 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, 496 uint32_t id) 497 { 498 struct drm_framebuffer *fb; 499 500 mutex_lock(&dev->mode_config.fb_lock); 501 fb = __drm_framebuffer_lookup(dev, id); 502 if (fb) { 503 if (!kref_get_unless_zero(&fb->refcount)) 504 fb = NULL; 505 } 506 mutex_unlock(&dev->mode_config.fb_lock); 507 508 return fb; 509 } 510 EXPORT_SYMBOL(drm_framebuffer_lookup); 511 512 /** 513 * drm_framebuffer_unreference - unref a framebuffer 514 * @fb: framebuffer to unref 515 * 516 * This functions decrements the fb's refcount and frees it if it drops to zero. 517 */ 518 void drm_framebuffer_unreference(struct drm_framebuffer *fb) 519 { 520 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, fb->refcount.kr_count); 521 kref_put(&fb->refcount, drm_framebuffer_free); 522 } 523 EXPORT_SYMBOL(drm_framebuffer_unreference); 524 525 /** 526 * drm_framebuffer_reference - incr the fb refcnt 527 * @fb: framebuffer 528 * 529 * This functions increments the fb's refcount. 530 */ 531 void drm_framebuffer_reference(struct drm_framebuffer *fb) 532 { 533 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, fb->refcount.kr_count); 534 kref_get(&fb->refcount); 535 } 536 EXPORT_SYMBOL(drm_framebuffer_reference); 537 538 /** 539 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr 540 * @fb: fb to unregister 541 * 542 * Drivers need to call this when cleaning up driver-private framebuffers, e.g. 543 * those used for fbdev. Note that the caller must hold a reference of it's own, 544 * i.e. the object may not be destroyed through this call (since it'll lead to a 545 * locking inversion). 546 */ 547 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) 548 { 549 struct drm_device *dev; 550 551 if (!fb) 552 return; 553 554 dev = fb->dev; 555 556 mutex_lock(&dev->mode_config.fb_lock); 557 /* Mark fb as reaped and drop idr ref. */ 558 __drm_framebuffer_unregister(dev, fb); 559 mutex_unlock(&dev->mode_config.fb_lock); 560 } 561 EXPORT_SYMBOL(drm_framebuffer_unregister_private); 562 563 /** 564 * drm_framebuffer_cleanup - remove a framebuffer object 565 * @fb: framebuffer to remove 566 * 567 * Cleanup framebuffer. This function is intended to be used from the drivers 568 * ->destroy callback. It can also be used to clean up driver private 569 * framebuffers embedded into a larger structure. 570 * 571 * Note that this function does not remove the fb from active usuage - if it is 572 * still used anywhere, hilarity can ensue since userspace could call getfb on 573 * the id and get back -EINVAL. Obviously no concern at driver unload time. 574 * 575 * Also, the framebuffer will not be removed from the lookup idr - for 576 * user-created framebuffers this will happen in in the rmfb ioctl. For 577 * driver-private objects (e.g. for fbdev) drivers need to explicitly call 578 * drm_framebuffer_unregister_private. 579 */ 580 void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 581 { 582 struct drm_device *dev = fb->dev; 583 584 mutex_lock(&dev->mode_config.fb_lock); 585 list_del(&fb->head); 586 dev->mode_config.num_fb--; 587 mutex_unlock(&dev->mode_config.fb_lock); 588 } 589 EXPORT_SYMBOL(drm_framebuffer_cleanup); 590 591 /** 592 * drm_framebuffer_remove - remove and unreference a framebuffer object 593 * @fb: framebuffer to remove 594 * 595 * Scans all the CRTCs and planes in @dev's mode_config. If they're 596 * using @fb, removes it, setting it to NULL. Then drops the reference to the 597 * passed-in framebuffer. Might take the modeset locks. 598 * 599 * Note that this function optimizes the cleanup away if the caller holds the 600 * last reference to the framebuffer. It is also guaranteed to not take the 601 * modeset locks in this case. 602 */ 603 void drm_framebuffer_remove(struct drm_framebuffer *fb) 604 { 605 struct drm_device *dev; 606 struct drm_crtc *crtc; 607 struct drm_plane *plane; 608 struct drm_mode_set set; 609 int ret; 610 611 if (!fb) 612 return; 613 614 dev = fb->dev; 615 616 WARN_ON(!list_empty(&fb->filp_head)); 617 618 /* 619 * drm ABI mandates that we remove any deleted framebuffers from active 620 * useage. But since most sane clients only remove framebuffers they no 621 * longer need, try to optimize this away. 622 * 623 * Since we're holding a reference ourselves, observing a refcount of 1 624 * means that we're the last holder and can skip it. Also, the refcount 625 * can never increase from 1 again, so we don't need any barriers or 626 * locks. 627 * 628 * Note that userspace could try to race with use and instate a new 629 * usage _after_ we've cleared all current ones. End result will be an 630 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot 631 * in this manner. 632 */ 633 if (!kref_exclusive_p(&fb->refcount)) { 634 drm_modeset_lock_all(dev); 635 /* remove from any CRTC */ 636 drm_for_each_crtc(crtc, dev) { 637 if (crtc->primary->fb == fb) { 638 /* should turn off the crtc */ 639 memset(&set, 0, sizeof(struct drm_mode_set)); 640 set.crtc = crtc; 641 set.fb = NULL; 642 ret = drm_mode_set_config_internal(&set); 643 if (ret) 644 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); 645 } 646 } 647 648 drm_for_each_plane(plane, dev) { 649 if (plane->fb == fb) 650 drm_plane_force_disable(plane); 651 } 652 drm_modeset_unlock_all(dev); 653 } 654 655 drm_framebuffer_unreference(fb); 656 } 657 EXPORT_SYMBOL(drm_framebuffer_remove); 658 659 DEFINE_WW_CLASS(crtc_ww_class); 660 661 /** 662 * drm_crtc_init_with_planes - Initialise a new CRTC object with 663 * specified primary and cursor planes. 664 * @dev: DRM device 665 * @crtc: CRTC object to init 666 * @primary: Primary plane for CRTC 667 * @cursor: Cursor plane for CRTC 668 * @funcs: callbacks for the new CRTC 669 * 670 * Inits a new object created as base part of a driver crtc object. 671 * 672 * Returns: 673 * Zero on success, error code on failure. 674 */ 675 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 676 struct drm_plane *primary, 677 struct drm_plane *cursor, 678 const struct drm_crtc_funcs *funcs) 679 { 680 struct drm_mode_config *config = &dev->mode_config; 681 int ret; 682 683 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); 684 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); 685 686 crtc->dev = dev; 687 crtc->funcs = funcs; 688 689 drm_modeset_lock_init(&crtc->mutex); 690 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 691 if (ret) 692 return ret; 693 694 crtc->base.properties = &crtc->properties; 695 696 list_add_tail(&crtc->head, &config->crtc_list); 697 config->num_crtc++; 698 699 crtc->primary = primary; 700 crtc->cursor = cursor; 701 if (primary) 702 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 703 if (cursor) 704 cursor->possible_crtcs = 1 << drm_crtc_index(crtc); 705 706 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 707 drm_object_attach_property(&crtc->base, config->prop_active, 0); 708 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); 709 } 710 711 return 0; 712 } 713 EXPORT_SYMBOL(drm_crtc_init_with_planes); 714 715 /** 716 * drm_crtc_cleanup - Clean up the core crtc usage 717 * @crtc: CRTC to cleanup 718 * 719 * This function cleans up @crtc and removes it from the DRM mode setting 720 * core. Note that the function does *not* free the crtc structure itself, 721 * this is the responsibility of the caller. 722 */ 723 void drm_crtc_cleanup(struct drm_crtc *crtc) 724 { 725 struct drm_device *dev = crtc->dev; 726 727 kfree(crtc->gamma_store); 728 crtc->gamma_store = NULL; 729 730 drm_modeset_lock_fini(&crtc->mutex); 731 732 drm_mode_object_put(dev, &crtc->base); 733 list_del(&crtc->head); 734 dev->mode_config.num_crtc--; 735 736 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); 737 if (crtc->state && crtc->funcs->atomic_destroy_state) 738 crtc->funcs->atomic_destroy_state(crtc, crtc->state); 739 740 memset(crtc, 0, sizeof(*crtc)); 741 } 742 EXPORT_SYMBOL(drm_crtc_cleanup); 743 744 /** 745 * drm_crtc_index - find the index of a registered CRTC 746 * @crtc: CRTC to find index for 747 * 748 * Given a registered CRTC, return the index of that CRTC within a DRM 749 * device's list of CRTCs. 750 */ 751 unsigned int drm_crtc_index(struct drm_crtc *crtc) 752 { 753 unsigned int index = 0; 754 struct drm_crtc *tmp; 755 756 drm_for_each_crtc(tmp, crtc->dev) { 757 if (tmp == crtc) 758 return index; 759 760 index++; 761 } 762 763 BUG(); 764 } 765 EXPORT_SYMBOL(drm_crtc_index); 766 767 /* 768 * drm_mode_remove - remove and free a mode 769 * @connector: connector list to modify 770 * @mode: mode to remove 771 * 772 * Remove @mode from @connector's mode list, then free it. 773 */ 774 static void drm_mode_remove(struct drm_connector *connector, 775 struct drm_display_mode *mode) 776 { 777 list_del(&mode->head); 778 drm_mode_destroy(connector->dev, mode); 779 } 780 781 /** 782 * drm_display_info_set_bus_formats - set the supported bus formats 783 * @info: display info to store bus formats in 784 * @formats: array containing the supported bus formats 785 * @num_formats: the number of entries in the fmts array 786 * 787 * Store the supported bus formats in display info structure. 788 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for 789 * a full list of available formats. 790 */ 791 int drm_display_info_set_bus_formats(struct drm_display_info *info, 792 const u32 *formats, 793 unsigned int num_formats) 794 { 795 u32 *fmts = NULL; 796 797 if (!formats && num_formats) 798 return -EINVAL; 799 800 if (formats && num_formats) { 801 fmts = kmemdup(formats, sizeof(*formats) * num_formats, 802 GFP_KERNEL); 803 if (!fmts) 804 return -ENOMEM; 805 } 806 807 kfree(info->bus_formats); 808 info->bus_formats = fmts; 809 info->num_bus_formats = num_formats; 810 811 return 0; 812 } 813 EXPORT_SYMBOL(drm_display_info_set_bus_formats); 814 815 /** 816 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 817 * @connector: connector to quwery 818 * 819 * The kernel supports per-connector configration of its consoles through 820 * use of the video= parameter. This function parses that option and 821 * extracts the user's specified mode (or enable/disable status) for a 822 * particular connector. This is typically only used during the early fbdev 823 * setup. 824 */ 825 static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 826 { 827 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 828 829 #ifdef __NetBSD__ 830 const char *option; 831 prop_dictionary_t prop = device_properties(connector->dev->dev); 832 if (!prop_dictionary_get_string(prop, connector->name, &option)) 833 return; 834 #else 835 char *option = NULL; 836 if (fb_get_options(connector->name, &option)) 837 return; 838 #endif 839 840 if (!drm_mode_parse_command_line_for_connector(option, 841 connector, 842 mode)) 843 return; 844 845 if (mode->force) { 846 const char *s; 847 848 switch (mode->force) { 849 case DRM_FORCE_OFF: 850 s = "OFF"; 851 break; 852 case DRM_FORCE_ON_DIGITAL: 853 s = "ON - dig"; 854 break; 855 default: 856 case DRM_FORCE_ON: 857 s = "ON"; 858 break; 859 } 860 861 DRM_INFO("forcing %s connector %s\n", connector->name, s); 862 connector->force = mode->force; 863 } 864 865 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 866 connector->name, 867 mode->xres, mode->yres, 868 mode->refresh_specified ? mode->refresh : 60, 869 mode->rb ? " reduced blanking" : "", 870 mode->margins ? " with margins" : "", 871 mode->interlace ? " interlaced" : ""); 872 } 873 874 /** 875 * drm_connector_init - Init a preallocated connector 876 * @dev: DRM device 877 * @connector: the connector to init 878 * @funcs: callbacks for this connector 879 * @connector_type: user visible type of the connector 880 * 881 * Initialises a preallocated connector. Connectors should be 882 * subclassed as part of driver connector objects. 883 * 884 * Returns: 885 * Zero on success, error code on failure. 886 */ 887 int drm_connector_init(struct drm_device *dev, 888 struct drm_connector *connector, 889 const struct drm_connector_funcs *funcs, 890 int connector_type) 891 { 892 struct drm_mode_config *config = &dev->mode_config; 893 int ret; 894 struct ida *connector_ida = 895 &drm_connector_enum_list[connector_type].ida; 896 897 drm_modeset_lock_all(dev); 898 899 ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false); 900 if (ret) 901 goto out_unlock; 902 903 connector->base.properties = &connector->properties; 904 connector->dev = dev; 905 connector->kdev = dev->dev; 906 connector->funcs = funcs; 907 connector->connector_type = connector_type; 908 connector->connector_type_id = 909 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); 910 if (connector->connector_type_id < 0) { 911 ret = connector->connector_type_id; 912 goto out_put; 913 } 914 connector->name = 915 kasprintf(GFP_KERNEL, "%s-%d", 916 drm_connector_enum_list[connector_type].name, 917 connector->connector_type_id); 918 if (!connector->name) { 919 ret = -ENOMEM; 920 goto out_put; 921 } 922 923 INIT_LIST_HEAD(&connector->probed_modes); 924 INIT_LIST_HEAD(&connector->modes); 925 connector->edid_blob_ptr = NULL; 926 connector->status = connector_status_unknown; 927 928 drm_connector_get_cmdline_mode(connector); 929 930 /* We should add connectors at the end to avoid upsetting the connector 931 * index too much. */ 932 list_add_tail(&connector->head, &config->connector_list); 933 config->num_connector++; 934 935 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 936 drm_object_attach_property(&connector->base, 937 config->edid_property, 938 0); 939 940 drm_object_attach_property(&connector->base, 941 config->dpms_property, 0); 942 943 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 944 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); 945 } 946 947 connector->debugfs_entry = NULL; 948 949 out_put: 950 if (ret) 951 drm_mode_object_put(dev, &connector->base); 952 953 out_unlock: 954 drm_modeset_unlock_all(dev); 955 956 return ret; 957 } 958 EXPORT_SYMBOL(drm_connector_init); 959 960 /** 961 * drm_connector_cleanup - cleans up an initialised connector 962 * @connector: connector to cleanup 963 * 964 * Cleans up the connector but doesn't free the object. 965 */ 966 void drm_connector_cleanup(struct drm_connector *connector) 967 { 968 struct drm_device *dev = connector->dev; 969 struct drm_display_mode *mode, *t; 970 971 if (connector->tile_group) { 972 drm_mode_put_tile_group(dev, connector->tile_group); 973 connector->tile_group = NULL; 974 } 975 976 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 977 drm_mode_remove(connector, mode); 978 979 list_for_each_entry_safe(mode, t, &connector->modes, head) 980 drm_mode_remove(connector, mode); 981 982 ida_remove(&drm_connector_enum_list[connector->connector_type].ida, 983 connector->connector_type_id); 984 985 kfree(connector->display_info.bus_formats); 986 drm_mode_object_put(dev, &connector->base); 987 kfree(connector->name); 988 connector->name = NULL; 989 list_del(&connector->head); 990 dev->mode_config.num_connector--; 991 992 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 993 if (connector->state && connector->funcs->atomic_destroy_state) 994 connector->funcs->atomic_destroy_state(connector, 995 connector->state); 996 997 memset(connector, 0, sizeof(*connector)); 998 } 999 EXPORT_SYMBOL(drm_connector_cleanup); 1000 1001 /** 1002 * drm_connector_index - find the index of a registered connector 1003 * @connector: connector to find index for 1004 * 1005 * Given a registered connector, return the index of that connector within a DRM 1006 * device's list of connectors. 1007 */ 1008 unsigned int drm_connector_index(struct drm_connector *connector) 1009 { 1010 unsigned int index = 0; 1011 struct drm_connector *tmp; 1012 struct drm_mode_config *config = &connector->dev->mode_config; 1013 1014 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 1015 1016 drm_for_each_connector(tmp, connector->dev) { 1017 if (tmp == connector) 1018 return index; 1019 1020 index++; 1021 } 1022 1023 BUG(); 1024 } 1025 EXPORT_SYMBOL(drm_connector_index); 1026 1027 /** 1028 * drm_connector_register - register a connector 1029 * @connector: the connector to register 1030 * 1031 * Register userspace interfaces for a connector 1032 * 1033 * Returns: 1034 * Zero on success, error code on failure. 1035 */ 1036 int drm_connector_register(struct drm_connector *connector) 1037 { 1038 #ifndef __NetBSD__ /* XXX sysfs, debugfs */ 1039 int ret; 1040 #endif 1041 1042 drm_mode_object_register(connector->dev, &connector->base); 1043 1044 #ifndef __NetBSD__ /* XXX sysfs, debugfs */ 1045 ret = drm_sysfs_connector_add(connector); 1046 if (ret) 1047 return ret; 1048 1049 ret = drm_debugfs_connector_add(connector); 1050 if (ret) { 1051 drm_sysfs_connector_remove(connector); 1052 return ret; 1053 } 1054 #endif 1055 1056 return 0; 1057 } 1058 EXPORT_SYMBOL(drm_connector_register); 1059 1060 /** 1061 * drm_connector_unregister - unregister a connector 1062 * @connector: the connector to unregister 1063 * 1064 * Unregister userspace interfaces for a connector 1065 */ 1066 void drm_connector_unregister(struct drm_connector *connector) 1067 { 1068 #ifndef __NetBSD__ /* XXX sysfs, debugfs */ 1069 drm_sysfs_connector_remove(connector); 1070 drm_debugfs_connector_remove(connector); 1071 #endif 1072 } 1073 EXPORT_SYMBOL(drm_connector_unregister); 1074 1075 1076 /** 1077 * drm_connector_unplug_all - unregister connector userspace interfaces 1078 * @dev: drm device 1079 * 1080 * This function unregisters all connector userspace interfaces in sysfs. Should 1081 * be call when the device is disconnected, e.g. from an usb driver's 1082 * ->disconnect callback. 1083 */ 1084 void drm_connector_unplug_all(struct drm_device *dev) 1085 { 1086 struct drm_connector *connector; 1087 1088 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */ 1089 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1090 drm_connector_unregister(connector); 1091 1092 } 1093 EXPORT_SYMBOL(drm_connector_unplug_all); 1094 1095 /** 1096 * drm_encoder_init - Init a preallocated encoder 1097 * @dev: drm device 1098 * @encoder: the encoder to init 1099 * @funcs: callbacks for this encoder 1100 * @encoder_type: user visible type of the encoder 1101 * 1102 * Initialises a preallocated encoder. Encoder should be 1103 * subclassed as part of driver encoder objects. 1104 * 1105 * Returns: 1106 * Zero on success, error code on failure. 1107 */ 1108 int drm_encoder_init(struct drm_device *dev, 1109 struct drm_encoder *encoder, 1110 const struct drm_encoder_funcs *funcs, 1111 int encoder_type) 1112 { 1113 int ret; 1114 1115 drm_modeset_lock_all(dev); 1116 1117 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1118 if (ret) 1119 goto out_unlock; 1120 1121 encoder->dev = dev; 1122 encoder->encoder_type = encoder_type; 1123 encoder->funcs = funcs; 1124 encoder->name = kasprintf(GFP_KERNEL, "%s-%d", 1125 drm_encoder_enum_list[encoder_type].name, 1126 encoder->base.id); 1127 if (!encoder->name) { 1128 ret = -ENOMEM; 1129 goto out_put; 1130 } 1131 1132 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1133 dev->mode_config.num_encoder++; 1134 1135 out_put: 1136 if (ret) 1137 drm_mode_object_put(dev, &encoder->base); 1138 1139 out_unlock: 1140 drm_modeset_unlock_all(dev); 1141 1142 return ret; 1143 } 1144 EXPORT_SYMBOL(drm_encoder_init); 1145 1146 /** 1147 * drm_encoder_cleanup - cleans up an initialised encoder 1148 * @encoder: encoder to cleanup 1149 * 1150 * Cleans up the encoder but doesn't free the object. 1151 */ 1152 void drm_encoder_cleanup(struct drm_encoder *encoder) 1153 { 1154 struct drm_device *dev = encoder->dev; 1155 1156 drm_modeset_lock_all(dev); 1157 drm_mode_object_put(dev, &encoder->base); 1158 kfree(encoder->name); 1159 list_del(&encoder->head); 1160 dev->mode_config.num_encoder--; 1161 drm_modeset_unlock_all(dev); 1162 1163 memset(encoder, 0, sizeof(*encoder)); 1164 } 1165 EXPORT_SYMBOL(drm_encoder_cleanup); 1166 1167 /** 1168 * drm_universal_plane_init - Initialize a new universal plane object 1169 * @dev: DRM device 1170 * @plane: plane object to init 1171 * @possible_crtcs: bitmask of possible CRTCs 1172 * @funcs: callbacks for the new plane 1173 * @formats: array of supported formats (%DRM_FORMAT_*) 1174 * @format_count: number of elements in @formats 1175 * @type: type of plane (overlay, primary, cursor) 1176 * 1177 * Initializes a plane object of type @type. 1178 * 1179 * Returns: 1180 * Zero on success, error code on failure. 1181 */ 1182 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1183 unsigned long possible_crtcs, 1184 const struct drm_plane_funcs *funcs, 1185 const uint32_t *formats, unsigned int format_count, 1186 enum drm_plane_type type) 1187 { 1188 struct drm_mode_config *config = &dev->mode_config; 1189 int ret; 1190 1191 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1192 if (ret) 1193 return ret; 1194 1195 drm_modeset_lock_init(&plane->mutex); 1196 1197 plane->base.properties = &plane->properties; 1198 plane->dev = dev; 1199 plane->funcs = funcs; 1200 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t), 1201 GFP_KERNEL); 1202 if (!plane->format_types) { 1203 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1204 drm_mode_object_put(dev, &plane->base); 1205 return -ENOMEM; 1206 } 1207 1208 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1209 plane->format_count = format_count; 1210 plane->possible_crtcs = possible_crtcs; 1211 plane->type = type; 1212 1213 list_add_tail(&plane->head, &config->plane_list); 1214 config->num_total_plane++; 1215 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1216 config->num_overlay_plane++; 1217 1218 drm_object_attach_property(&plane->base, 1219 config->plane_type_property, 1220 plane->type); 1221 1222 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 1223 drm_object_attach_property(&plane->base, config->prop_fb_id, 0); 1224 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); 1225 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); 1226 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); 1227 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); 1228 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); 1229 drm_object_attach_property(&plane->base, config->prop_src_x, 0); 1230 drm_object_attach_property(&plane->base, config->prop_src_y, 0); 1231 drm_object_attach_property(&plane->base, config->prop_src_w, 0); 1232 drm_object_attach_property(&plane->base, config->prop_src_h, 0); 1233 } 1234 1235 return 0; 1236 } 1237 EXPORT_SYMBOL(drm_universal_plane_init); 1238 1239 /** 1240 * drm_plane_init - Initialize a legacy plane 1241 * @dev: DRM device 1242 * @plane: plane object to init 1243 * @possible_crtcs: bitmask of possible CRTCs 1244 * @funcs: callbacks for the new plane 1245 * @formats: array of supported formats (%DRM_FORMAT_*) 1246 * @format_count: number of elements in @formats 1247 * @is_primary: plane type (primary vs overlay) 1248 * 1249 * Legacy API to initialize a DRM plane. 1250 * 1251 * New drivers should call drm_universal_plane_init() instead. 1252 * 1253 * Returns: 1254 * Zero on success, error code on failure. 1255 */ 1256 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1257 unsigned long possible_crtcs, 1258 const struct drm_plane_funcs *funcs, 1259 const uint32_t *formats, unsigned int format_count, 1260 bool is_primary) 1261 { 1262 enum drm_plane_type type; 1263 1264 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1265 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1266 formats, format_count, type); 1267 } 1268 EXPORT_SYMBOL(drm_plane_init); 1269 1270 /** 1271 * drm_plane_cleanup - Clean up the core plane usage 1272 * @plane: plane to cleanup 1273 * 1274 * This function cleans up @plane and removes it from the DRM mode setting 1275 * core. Note that the function does *not* free the plane structure itself, 1276 * this is the responsibility of the caller. 1277 */ 1278 void drm_plane_cleanup(struct drm_plane *plane) 1279 { 1280 struct drm_device *dev = plane->dev; 1281 1282 drm_modeset_lock_all(dev); 1283 kfree(plane->format_types); 1284 drm_mode_object_put(dev, &plane->base); 1285 1286 BUG_ON(list_empty(&plane->head)); 1287 1288 list_del(&plane->head); 1289 dev->mode_config.num_total_plane--; 1290 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1291 dev->mode_config.num_overlay_plane--; 1292 drm_modeset_unlock_all(dev); 1293 1294 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1295 if (plane->state && plane->funcs->atomic_destroy_state) 1296 plane->funcs->atomic_destroy_state(plane, plane->state); 1297 drm_modeset_lock_fini(&plane->mutex); 1298 1299 memset(plane, 0, sizeof(*plane)); 1300 } 1301 EXPORT_SYMBOL(drm_plane_cleanup); 1302 1303 /** 1304 * drm_plane_index - find the index of a registered plane 1305 * @plane: plane to find index for 1306 * 1307 * Given a registered plane, return the index of that CRTC within a DRM 1308 * device's list of planes. 1309 */ 1310 unsigned int drm_plane_index(struct drm_plane *plane) 1311 { 1312 unsigned int index = 0; 1313 struct drm_plane *tmp; 1314 1315 drm_for_each_plane(tmp, plane->dev) { 1316 if (tmp == plane) 1317 return index; 1318 1319 index++; 1320 } 1321 1322 BUG(); 1323 } 1324 EXPORT_SYMBOL(drm_plane_index); 1325 1326 /** 1327 * drm_plane_from_index - find the registered plane at an index 1328 * @dev: DRM device 1329 * @idx: index of registered plane to find for 1330 * 1331 * Given a plane index, return the registered plane from DRM device's 1332 * list of planes with matching index. 1333 */ 1334 struct drm_plane * 1335 drm_plane_from_index(struct drm_device *dev, int idx) 1336 { 1337 struct drm_plane *plane; 1338 unsigned int i = 0; 1339 1340 drm_for_each_plane(plane, dev) { 1341 if (i == idx) 1342 return plane; 1343 i++; 1344 } 1345 return NULL; 1346 } 1347 EXPORT_SYMBOL(drm_plane_from_index); 1348 1349 /** 1350 * drm_plane_force_disable - Forcibly disable a plane 1351 * @plane: plane to disable 1352 * 1353 * Forces the plane to be disabled. 1354 * 1355 * Used when the plane's current framebuffer is destroyed, 1356 * and when restoring fbdev mode. 1357 */ 1358 void drm_plane_force_disable(struct drm_plane *plane) 1359 { 1360 int ret; 1361 1362 if (!plane->fb) 1363 return; 1364 1365 plane->old_fb = plane->fb; 1366 ret = plane->funcs->disable_plane(plane); 1367 if (ret) { 1368 DRM_ERROR("failed to disable plane with busy fb\n"); 1369 plane->old_fb = NULL; 1370 return; 1371 } 1372 /* disconnect the plane from the fb and crtc: */ 1373 drm_framebuffer_unreference(plane->old_fb); 1374 plane->old_fb = NULL; 1375 plane->fb = NULL; 1376 plane->crtc = NULL; 1377 } 1378 EXPORT_SYMBOL(drm_plane_force_disable); 1379 1380 static int drm_mode_create_standard_properties(struct drm_device *dev) 1381 { 1382 struct drm_property *prop; 1383 1384 /* 1385 * Standard properties (apply to all connectors) 1386 */ 1387 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1388 DRM_MODE_PROP_IMMUTABLE, 1389 "EDID", 0); 1390 if (!prop) 1391 return -ENOMEM; 1392 dev->mode_config.edid_property = prop; 1393 1394 prop = drm_property_create_enum(dev, 0, 1395 "DPMS", drm_dpms_enum_list, 1396 ARRAY_SIZE(drm_dpms_enum_list)); 1397 if (!prop) 1398 return -ENOMEM; 1399 dev->mode_config.dpms_property = prop; 1400 1401 prop = drm_property_create(dev, 1402 DRM_MODE_PROP_BLOB | 1403 DRM_MODE_PROP_IMMUTABLE, 1404 "PATH", 0); 1405 if (!prop) 1406 return -ENOMEM; 1407 dev->mode_config.path_property = prop; 1408 1409 prop = drm_property_create(dev, 1410 DRM_MODE_PROP_BLOB | 1411 DRM_MODE_PROP_IMMUTABLE, 1412 "TILE", 0); 1413 if (!prop) 1414 return -ENOMEM; 1415 dev->mode_config.tile_property = prop; 1416 1417 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1418 "type", drm_plane_type_enum_list, 1419 ARRAY_SIZE(drm_plane_type_enum_list)); 1420 if (!prop) 1421 return -ENOMEM; 1422 dev->mode_config.plane_type_property = prop; 1423 1424 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1425 "SRC_X", 0, UINT_MAX); 1426 if (!prop) 1427 return -ENOMEM; 1428 dev->mode_config.prop_src_x = prop; 1429 1430 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1431 "SRC_Y", 0, UINT_MAX); 1432 if (!prop) 1433 return -ENOMEM; 1434 dev->mode_config.prop_src_y = prop; 1435 1436 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1437 "SRC_W", 0, UINT_MAX); 1438 if (!prop) 1439 return -ENOMEM; 1440 dev->mode_config.prop_src_w = prop; 1441 1442 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1443 "SRC_H", 0, UINT_MAX); 1444 if (!prop) 1445 return -ENOMEM; 1446 dev->mode_config.prop_src_h = prop; 1447 1448 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1449 "CRTC_X", INT_MIN, INT_MAX); 1450 if (!prop) 1451 return -ENOMEM; 1452 dev->mode_config.prop_crtc_x = prop; 1453 1454 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1455 "CRTC_Y", INT_MIN, INT_MAX); 1456 if (!prop) 1457 return -ENOMEM; 1458 dev->mode_config.prop_crtc_y = prop; 1459 1460 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1461 "CRTC_W", 0, INT_MAX); 1462 if (!prop) 1463 return -ENOMEM; 1464 dev->mode_config.prop_crtc_w = prop; 1465 1466 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1467 "CRTC_H", 0, INT_MAX); 1468 if (!prop) 1469 return -ENOMEM; 1470 dev->mode_config.prop_crtc_h = prop; 1471 1472 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1473 "FB_ID", DRM_MODE_OBJECT_FB); 1474 if (!prop) 1475 return -ENOMEM; 1476 dev->mode_config.prop_fb_id = prop; 1477 1478 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1479 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 1480 if (!prop) 1481 return -ENOMEM; 1482 dev->mode_config.prop_crtc_id = prop; 1483 1484 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 1485 "ACTIVE"); 1486 if (!prop) 1487 return -ENOMEM; 1488 dev->mode_config.prop_active = prop; 1489 1490 prop = drm_property_create(dev, 1491 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 1492 "MODE_ID", 0); 1493 if (!prop) 1494 return -ENOMEM; 1495 dev->mode_config.prop_mode_id = prop; 1496 1497 return 0; 1498 } 1499 1500 /** 1501 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1502 * @dev: DRM device 1503 * 1504 * Called by a driver the first time a DVI-I connector is made. 1505 */ 1506 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1507 { 1508 struct drm_property *dvi_i_selector; 1509 struct drm_property *dvi_i_subconnector; 1510 1511 if (dev->mode_config.dvi_i_select_subconnector_property) 1512 return 0; 1513 1514 dvi_i_selector = 1515 drm_property_create_enum(dev, 0, 1516 "select subconnector", 1517 drm_dvi_i_select_enum_list, 1518 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1519 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1520 1521 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1522 "subconnector", 1523 drm_dvi_i_subconnector_enum_list, 1524 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1525 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1526 1527 return 0; 1528 } 1529 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1530 1531 /** 1532 * drm_create_tv_properties - create TV specific connector properties 1533 * @dev: DRM device 1534 * @num_modes: number of different TV formats (modes) supported 1535 * @modes: array of pointers to strings containing name of each format 1536 * 1537 * Called by a driver's TV initialization routine, this function creates 1538 * the TV specific connector properties for a given device. Caller is 1539 * responsible for allocating a list of format names and passing them to 1540 * this routine. 1541 */ 1542 int drm_mode_create_tv_properties(struct drm_device *dev, 1543 unsigned int num_modes, 1544 const char * const modes[]) 1545 { 1546 struct drm_property *tv_selector; 1547 struct drm_property *tv_subconnector; 1548 unsigned int i; 1549 1550 if (dev->mode_config.tv_select_subconnector_property) 1551 return 0; 1552 1553 /* 1554 * Basic connector properties 1555 */ 1556 tv_selector = drm_property_create_enum(dev, 0, 1557 "select subconnector", 1558 drm_tv_select_enum_list, 1559 ARRAY_SIZE(drm_tv_select_enum_list)); 1560 if (!tv_selector) 1561 goto nomem; 1562 1563 dev->mode_config.tv_select_subconnector_property = tv_selector; 1564 1565 tv_subconnector = 1566 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1567 "subconnector", 1568 drm_tv_subconnector_enum_list, 1569 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1570 if (!tv_subconnector) 1571 goto nomem; 1572 dev->mode_config.tv_subconnector_property = tv_subconnector; 1573 1574 /* 1575 * Other, TV specific properties: margins & TV modes. 1576 */ 1577 dev->mode_config.tv_left_margin_property = 1578 drm_property_create_range(dev, 0, "left margin", 0, 100); 1579 if (!dev->mode_config.tv_left_margin_property) 1580 goto nomem; 1581 1582 dev->mode_config.tv_right_margin_property = 1583 drm_property_create_range(dev, 0, "right margin", 0, 100); 1584 if (!dev->mode_config.tv_right_margin_property) 1585 goto nomem; 1586 1587 dev->mode_config.tv_top_margin_property = 1588 drm_property_create_range(dev, 0, "top margin", 0, 100); 1589 if (!dev->mode_config.tv_top_margin_property) 1590 goto nomem; 1591 1592 dev->mode_config.tv_bottom_margin_property = 1593 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1594 if (!dev->mode_config.tv_bottom_margin_property) 1595 goto nomem; 1596 1597 dev->mode_config.tv_mode_property = 1598 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1599 "mode", num_modes); 1600 if (!dev->mode_config.tv_mode_property) 1601 goto nomem; 1602 1603 for (i = 0; i < num_modes; i++) 1604 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1605 i, modes[i]); 1606 1607 dev->mode_config.tv_brightness_property = 1608 drm_property_create_range(dev, 0, "brightness", 0, 100); 1609 if (!dev->mode_config.tv_brightness_property) 1610 goto nomem; 1611 1612 dev->mode_config.tv_contrast_property = 1613 drm_property_create_range(dev, 0, "contrast", 0, 100); 1614 if (!dev->mode_config.tv_contrast_property) 1615 goto nomem; 1616 1617 dev->mode_config.tv_flicker_reduction_property = 1618 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1619 if (!dev->mode_config.tv_flicker_reduction_property) 1620 goto nomem; 1621 1622 dev->mode_config.tv_overscan_property = 1623 drm_property_create_range(dev, 0, "overscan", 0, 100); 1624 if (!dev->mode_config.tv_overscan_property) 1625 goto nomem; 1626 1627 dev->mode_config.tv_saturation_property = 1628 drm_property_create_range(dev, 0, "saturation", 0, 100); 1629 if (!dev->mode_config.tv_saturation_property) 1630 goto nomem; 1631 1632 dev->mode_config.tv_hue_property = 1633 drm_property_create_range(dev, 0, "hue", 0, 100); 1634 if (!dev->mode_config.tv_hue_property) 1635 goto nomem; 1636 1637 return 0; 1638 nomem: 1639 return -ENOMEM; 1640 } 1641 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1642 1643 /** 1644 * drm_mode_create_scaling_mode_property - create scaling mode property 1645 * @dev: DRM device 1646 * 1647 * Called by a driver the first time it's needed, must be attached to desired 1648 * connectors. 1649 */ 1650 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1651 { 1652 struct drm_property *scaling_mode; 1653 1654 if (dev->mode_config.scaling_mode_property) 1655 return 0; 1656 1657 scaling_mode = 1658 drm_property_create_enum(dev, 0, "scaling mode", 1659 drm_scaling_mode_enum_list, 1660 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1661 1662 dev->mode_config.scaling_mode_property = scaling_mode; 1663 1664 return 0; 1665 } 1666 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1667 1668 /** 1669 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1670 * @dev: DRM device 1671 * 1672 * Called by a driver the first time it's needed, must be attached to desired 1673 * connectors. 1674 * 1675 * Returns: 1676 * Zero on success, negative errno on failure. 1677 */ 1678 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1679 { 1680 if (dev->mode_config.aspect_ratio_property) 1681 return 0; 1682 1683 dev->mode_config.aspect_ratio_property = 1684 drm_property_create_enum(dev, 0, "aspect ratio", 1685 drm_aspect_ratio_enum_list, 1686 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1687 1688 if (dev->mode_config.aspect_ratio_property == NULL) 1689 return -ENOMEM; 1690 1691 return 0; 1692 } 1693 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1694 1695 /** 1696 * drm_mode_create_dirty_property - create dirty property 1697 * @dev: DRM device 1698 * 1699 * Called by a driver the first time it's needed, must be attached to desired 1700 * connectors. 1701 */ 1702 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1703 { 1704 struct drm_property *dirty_info; 1705 1706 if (dev->mode_config.dirty_info_property) 1707 return 0; 1708 1709 dirty_info = 1710 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1711 "dirty", 1712 drm_dirty_info_enum_list, 1713 ARRAY_SIZE(drm_dirty_info_enum_list)); 1714 dev->mode_config.dirty_info_property = dirty_info; 1715 1716 return 0; 1717 } 1718 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1719 1720 /** 1721 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1722 * @dev: DRM device 1723 * 1724 * Create the the suggested x/y offset property for connectors. 1725 */ 1726 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1727 { 1728 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1729 return 0; 1730 1731 dev->mode_config.suggested_x_property = 1732 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1733 1734 dev->mode_config.suggested_y_property = 1735 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1736 1737 if (dev->mode_config.suggested_x_property == NULL || 1738 dev->mode_config.suggested_y_property == NULL) 1739 return -ENOMEM; 1740 return 0; 1741 } 1742 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1743 1744 /** 1745 * drm_mode_getresources - get graphics configuration 1746 * @dev: drm device for the ioctl 1747 * @data: data pointer for the ioctl 1748 * @file_priv: drm file for the ioctl call 1749 * 1750 * Construct a set of configuration description structures and return 1751 * them to the user, including CRTC, connector and framebuffer configuration. 1752 * 1753 * Called by the user via ioctl. 1754 * 1755 * Returns: 1756 * Zero on success, negative errno on failure. 1757 */ 1758 int drm_mode_getresources(struct drm_device *dev, void *data, 1759 struct drm_file *file_priv) 1760 { 1761 struct drm_mode_card_res *card_res = data; 1762 struct list_head *lh; 1763 struct drm_framebuffer *fb; 1764 struct drm_connector *connector; 1765 struct drm_crtc *crtc; 1766 struct drm_encoder *encoder; 1767 int ret = 0; 1768 int connector_count = 0; 1769 int crtc_count = 0; 1770 int fb_count = 0; 1771 int encoder_count = 0; 1772 int copied = 0; 1773 uint32_t __user *fb_id; 1774 uint32_t __user *crtc_id; 1775 uint32_t __user *connector_id; 1776 uint32_t __user *encoder_id; 1777 1778 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1779 return -EINVAL; 1780 1781 1782 mutex_lock(&file_priv->fbs_lock); 1783 /* 1784 * For the non-control nodes we need to limit the list of resources 1785 * by IDs in the group list for this node 1786 */ 1787 list_for_each(lh, &file_priv->fbs) 1788 fb_count++; 1789 1790 /* handle this in 4 parts */ 1791 /* FBs */ 1792 if (card_res->count_fbs >= fb_count) { 1793 copied = 0; 1794 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1795 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1796 if (put_user(fb->base.id, fb_id + copied)) { 1797 mutex_unlock(&file_priv->fbs_lock); 1798 return -EFAULT; 1799 } 1800 copied++; 1801 } 1802 } 1803 card_res->count_fbs = fb_count; 1804 mutex_unlock(&file_priv->fbs_lock); 1805 1806 /* mode_config.mutex protects the connector list against e.g. DP MST 1807 * connector hot-adding. CRTC/Plane lists are invariant. */ 1808 mutex_lock(&dev->mode_config.mutex); 1809 drm_for_each_crtc(crtc, dev) 1810 crtc_count++; 1811 1812 drm_for_each_connector(connector, dev) 1813 connector_count++; 1814 1815 drm_for_each_encoder(encoder, dev) 1816 encoder_count++; 1817 1818 card_res->max_height = dev->mode_config.max_height; 1819 card_res->min_height = dev->mode_config.min_height; 1820 card_res->max_width = dev->mode_config.max_width; 1821 card_res->min_width = dev->mode_config.min_width; 1822 1823 /* CRTCs */ 1824 if (card_res->count_crtcs >= crtc_count) { 1825 copied = 0; 1826 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1827 drm_for_each_crtc(crtc, dev) { 1828 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 1829 if (put_user(crtc->base.id, crtc_id + copied)) { 1830 ret = -EFAULT; 1831 goto out; 1832 } 1833 copied++; 1834 } 1835 } 1836 card_res->count_crtcs = crtc_count; 1837 1838 /* Encoders */ 1839 if (card_res->count_encoders >= encoder_count) { 1840 copied = 0; 1841 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1842 drm_for_each_encoder(encoder, dev) { 1843 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1844 encoder->name); 1845 if (put_user(encoder->base.id, encoder_id + 1846 copied)) { 1847 ret = -EFAULT; 1848 goto out; 1849 } 1850 copied++; 1851 } 1852 } 1853 card_res->count_encoders = encoder_count; 1854 1855 /* Connectors */ 1856 if (card_res->count_connectors >= connector_count) { 1857 copied = 0; 1858 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1859 drm_for_each_connector(connector, dev) { 1860 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1861 connector->base.id, 1862 connector->name); 1863 if (put_user(connector->base.id, 1864 connector_id + copied)) { 1865 ret = -EFAULT; 1866 goto out; 1867 } 1868 copied++; 1869 } 1870 } 1871 card_res->count_connectors = connector_count; 1872 1873 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1874 card_res->count_connectors, card_res->count_encoders); 1875 1876 out: 1877 mutex_unlock(&dev->mode_config.mutex); 1878 return ret; 1879 } 1880 1881 /** 1882 * drm_mode_getcrtc - get CRTC configuration 1883 * @dev: drm device for the ioctl 1884 * @data: data pointer for the ioctl 1885 * @file_priv: drm file for the ioctl call 1886 * 1887 * Construct a CRTC configuration structure to return to the user. 1888 * 1889 * Called by the user via ioctl. 1890 * 1891 * Returns: 1892 * Zero on success, negative errno on failure. 1893 */ 1894 int drm_mode_getcrtc(struct drm_device *dev, 1895 void *data, struct drm_file *file_priv) 1896 { 1897 struct drm_mode_crtc *crtc_resp = data; 1898 struct drm_crtc *crtc; 1899 1900 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1901 return -EINVAL; 1902 1903 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 1904 if (!crtc) 1905 return -ENOENT; 1906 1907 drm_modeset_lock_crtc(crtc, crtc->primary); 1908 crtc_resp->gamma_size = crtc->gamma_size; 1909 if (crtc->primary->fb) 1910 crtc_resp->fb_id = crtc->primary->fb->base.id; 1911 else 1912 crtc_resp->fb_id = 0; 1913 1914 if (crtc->state) { 1915 crtc_resp->x = crtc->primary->state->src_x >> 16; 1916 crtc_resp->y = crtc->primary->state->src_y >> 16; 1917 if (crtc->state->enable) { 1918 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); 1919 crtc_resp->mode_valid = 1; 1920 1921 } else { 1922 crtc_resp->mode_valid = 0; 1923 } 1924 } else { 1925 crtc_resp->x = crtc->x; 1926 crtc_resp->y = crtc->y; 1927 if (crtc->enabled) { 1928 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); 1929 crtc_resp->mode_valid = 1; 1930 1931 } else { 1932 crtc_resp->mode_valid = 0; 1933 } 1934 } 1935 drm_modeset_unlock_crtc(crtc); 1936 1937 return 0; 1938 } 1939 1940 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 1941 const struct drm_file *file_priv) 1942 { 1943 /* 1944 * If user-space hasn't configured the driver to expose the stereo 3D 1945 * modes, don't expose them. 1946 */ 1947 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 1948 return false; 1949 1950 return true; 1951 } 1952 1953 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 1954 { 1955 /* For atomic drivers only state objects are synchronously updated and 1956 * protected by modeset locks, so check those first. */ 1957 if (connector->state) 1958 return connector->state->best_encoder; 1959 return connector->encoder; 1960 } 1961 1962 /* helper for getconnector and getproperties ioctls */ 1963 static int get_properties(struct drm_mode_object *obj, bool atomic, 1964 uint32_t __user *prop_ptr, uint64_t __user *prop_values, 1965 uint32_t *arg_count_props) 1966 { 1967 int props_count; 1968 int i, ret, copied; 1969 1970 props_count = obj->properties->count; 1971 if (!atomic) 1972 props_count -= obj->properties->atomic_count; 1973 1974 if ((*arg_count_props >= props_count) && props_count) { 1975 for (i = 0, copied = 0; copied < props_count; i++) { 1976 struct drm_property *prop = obj->properties->properties[i]; 1977 uint64_t val; 1978 1979 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) 1980 continue; 1981 1982 ret = drm_object_property_get_value(obj, prop, &val); 1983 if (ret) 1984 return ret; 1985 1986 if (put_user(prop->base.id, prop_ptr + copied)) 1987 return -EFAULT; 1988 1989 if (put_user(val, prop_values + copied)) 1990 return -EFAULT; 1991 1992 copied++; 1993 } 1994 } 1995 *arg_count_props = props_count; 1996 1997 return 0; 1998 } 1999 2000 /** 2001 * drm_mode_getconnector - get connector configuration 2002 * @dev: drm device for the ioctl 2003 * @data: data pointer for the ioctl 2004 * @file_priv: drm file for the ioctl call 2005 * 2006 * Construct a connector configuration structure to return to the user. 2007 * 2008 * Called by the user via ioctl. 2009 * 2010 * Returns: 2011 * Zero on success, negative errno on failure. 2012 */ 2013 int drm_mode_getconnector(struct drm_device *dev, void *data, 2014 struct drm_file *file_priv) 2015 { 2016 struct drm_mode_get_connector *out_resp = data; 2017 struct drm_connector *connector; 2018 struct drm_encoder *encoder; 2019 struct drm_display_mode *mode; 2020 int mode_count = 0; 2021 int encoders_count = 0; 2022 int ret = 0; 2023 int copied = 0; 2024 int i; 2025 struct drm_mode_modeinfo u_mode; 2026 struct drm_mode_modeinfo __user *mode_ptr; 2027 uint32_t __user *encoder_ptr; 2028 2029 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2030 return -EINVAL; 2031 2032 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2033 2034 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 2035 2036 mutex_lock(&dev->mode_config.mutex); 2037 2038 connector = drm_connector_find(dev, out_resp->connector_id); 2039 if (!connector) { 2040 ret = -ENOENT; 2041 goto out_unlock; 2042 } 2043 2044 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) 2045 if (connector->encoder_ids[i] != 0) 2046 encoders_count++; 2047 2048 if (out_resp->count_modes == 0) { 2049 connector->funcs->fill_modes(connector, 2050 dev->mode_config.max_width, 2051 dev->mode_config.max_height); 2052 } 2053 2054 /* delayed so we get modes regardless of pre-fill_modes state */ 2055 list_for_each_entry(mode, &connector->modes, head) 2056 if (drm_mode_expose_to_userspace(mode, file_priv)) 2057 mode_count++; 2058 2059 out_resp->connector_id = connector->base.id; 2060 out_resp->connector_type = connector->connector_type; 2061 out_resp->connector_type_id = connector->connector_type_id; 2062 out_resp->mm_width = connector->display_info.width_mm; 2063 out_resp->mm_height = connector->display_info.height_mm; 2064 out_resp->subpixel = connector->display_info.subpixel_order; 2065 out_resp->connection = connector->status; 2066 2067 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2068 encoder = drm_connector_get_encoder(connector); 2069 if (encoder) 2070 out_resp->encoder_id = encoder->base.id; 2071 else 2072 out_resp->encoder_id = 0; 2073 2074 /* 2075 * This ioctl is called twice, once to determine how much space is 2076 * needed, and the 2nd time to fill it. 2077 */ 2078 if ((out_resp->count_modes >= mode_count) && mode_count) { 2079 copied = 0; 2080 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2081 list_for_each_entry(mode, &connector->modes, head) { 2082 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2083 continue; 2084 2085 drm_mode_convert_to_umode(&u_mode, mode); 2086 if (copy_to_user(mode_ptr + copied, 2087 &u_mode, sizeof(u_mode))) { 2088 ret = -EFAULT; 2089 goto out; 2090 } 2091 copied++; 2092 } 2093 } 2094 out_resp->count_modes = mode_count; 2095 2096 ret = get_properties(&connector->base, file_priv->atomic, 2097 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2098 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2099 &out_resp->count_props); 2100 if (ret) 2101 goto out; 2102 2103 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2104 copied = 0; 2105 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2106 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2107 if (connector->encoder_ids[i] != 0) { 2108 if (put_user(connector->encoder_ids[i], 2109 encoder_ptr + copied)) { 2110 ret = -EFAULT; 2111 goto out; 2112 } 2113 copied++; 2114 } 2115 } 2116 } 2117 out_resp->count_encoders = encoders_count; 2118 2119 out: 2120 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2121 2122 out_unlock: 2123 mutex_unlock(&dev->mode_config.mutex); 2124 2125 return ret; 2126 } 2127 2128 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2129 { 2130 struct drm_connector *connector; 2131 struct drm_device *dev = encoder->dev; 2132 bool uses_atomic = false; 2133 2134 /* For atomic drivers only state objects are synchronously updated and 2135 * protected by modeset locks, so check those first. */ 2136 drm_for_each_connector(connector, dev) { 2137 if (!connector->state) 2138 continue; 2139 2140 uses_atomic = true; 2141 2142 if (connector->state->best_encoder != encoder) 2143 continue; 2144 2145 return connector->state->crtc; 2146 } 2147 2148 /* Don't return stale data (e.g. pending async disable). */ 2149 if (uses_atomic) 2150 return NULL; 2151 2152 return encoder->crtc; 2153 } 2154 2155 /** 2156 * drm_mode_getencoder - get encoder configuration 2157 * @dev: drm device for the ioctl 2158 * @data: data pointer for the ioctl 2159 * @file_priv: drm file for the ioctl call 2160 * 2161 * Construct a encoder configuration structure to return to the user. 2162 * 2163 * Called by the user via ioctl. 2164 * 2165 * Returns: 2166 * Zero on success, negative errno on failure. 2167 */ 2168 int drm_mode_getencoder(struct drm_device *dev, void *data, 2169 struct drm_file *file_priv) 2170 { 2171 struct drm_mode_get_encoder *enc_resp = data; 2172 struct drm_encoder *encoder; 2173 struct drm_crtc *crtc; 2174 2175 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2176 return -EINVAL; 2177 2178 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2179 if (!encoder) 2180 return -ENOENT; 2181 2182 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2183 crtc = drm_encoder_get_crtc(encoder); 2184 if (crtc) 2185 enc_resp->crtc_id = crtc->base.id; 2186 else 2187 enc_resp->crtc_id = 0; 2188 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2189 2190 enc_resp->encoder_type = encoder->encoder_type; 2191 enc_resp->encoder_id = encoder->base.id; 2192 enc_resp->possible_crtcs = encoder->possible_crtcs; 2193 enc_resp->possible_clones = encoder->possible_clones; 2194 2195 return 0; 2196 } 2197 2198 /** 2199 * drm_mode_getplane_res - enumerate all plane resources 2200 * @dev: DRM device 2201 * @data: ioctl data 2202 * @file_priv: DRM file info 2203 * 2204 * Construct a list of plane ids to return to the user. 2205 * 2206 * Called by the user via ioctl. 2207 * 2208 * Returns: 2209 * Zero on success, negative errno on failure. 2210 */ 2211 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2212 struct drm_file *file_priv) 2213 { 2214 struct drm_mode_get_plane_res *plane_resp = data; 2215 struct drm_mode_config *config; 2216 struct drm_plane *plane; 2217 uint32_t __user *plane_ptr; 2218 int copied = 0; 2219 unsigned num_planes; 2220 2221 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2222 return -EINVAL; 2223 2224 config = &dev->mode_config; 2225 2226 if (file_priv->universal_planes) 2227 num_planes = config->num_total_plane; 2228 else 2229 num_planes = config->num_overlay_plane; 2230 2231 /* 2232 * This ioctl is called twice, once to determine how much space is 2233 * needed, and the 2nd time to fill it. 2234 */ 2235 if (num_planes && 2236 (plane_resp->count_planes >= num_planes)) { 2237 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2238 2239 /* Plane lists are invariant, no locking needed. */ 2240 drm_for_each_plane(plane, dev) { 2241 /* 2242 * Unless userspace set the 'universal planes' 2243 * capability bit, only advertise overlays. 2244 */ 2245 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2246 !file_priv->universal_planes) 2247 continue; 2248 2249 if (put_user(plane->base.id, plane_ptr + copied)) 2250 return -EFAULT; 2251 copied++; 2252 } 2253 } 2254 plane_resp->count_planes = num_planes; 2255 2256 return 0; 2257 } 2258 2259 /** 2260 * drm_mode_getplane - get plane configuration 2261 * @dev: DRM device 2262 * @data: ioctl data 2263 * @file_priv: DRM file info 2264 * 2265 * Construct a plane configuration structure to return to the user. 2266 * 2267 * Called by the user via ioctl. 2268 * 2269 * Returns: 2270 * Zero on success, negative errno on failure. 2271 */ 2272 int drm_mode_getplane(struct drm_device *dev, void *data, 2273 struct drm_file *file_priv) 2274 { 2275 struct drm_mode_get_plane *plane_resp = data; 2276 struct drm_plane *plane; 2277 uint32_t __user *format_ptr; 2278 2279 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2280 return -EINVAL; 2281 2282 plane = drm_plane_find(dev, plane_resp->plane_id); 2283 if (!plane) 2284 return -ENOENT; 2285 2286 drm_modeset_lock(&plane->mutex, NULL); 2287 if (plane->crtc) 2288 plane_resp->crtc_id = plane->crtc->base.id; 2289 else 2290 plane_resp->crtc_id = 0; 2291 2292 if (plane->fb) 2293 plane_resp->fb_id = plane->fb->base.id; 2294 else 2295 plane_resp->fb_id = 0; 2296 drm_modeset_unlock(&plane->mutex); 2297 2298 plane_resp->plane_id = plane->base.id; 2299 plane_resp->possible_crtcs = plane->possible_crtcs; 2300 plane_resp->gamma_size = 0; 2301 2302 /* 2303 * This ioctl is called twice, once to determine how much space is 2304 * needed, and the 2nd time to fill it. 2305 */ 2306 if (plane->format_count && 2307 (plane_resp->count_format_types >= plane->format_count)) { 2308 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2309 if (copy_to_user(format_ptr, 2310 plane->format_types, 2311 sizeof(uint32_t) * plane->format_count)) { 2312 return -EFAULT; 2313 } 2314 } 2315 plane_resp->count_format_types = plane->format_count; 2316 2317 return 0; 2318 } 2319 2320 /** 2321 * drm_plane_check_pixel_format - Check if the plane supports the pixel format 2322 * @plane: plane to check for format support 2323 * @format: the pixel format 2324 * 2325 * Returns: 2326 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL 2327 * otherwise. 2328 */ 2329 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format) 2330 { 2331 unsigned int i; 2332 2333 for (i = 0; i < plane->format_count; i++) { 2334 if (format == plane->format_types[i]) 2335 return 0; 2336 } 2337 2338 return -EINVAL; 2339 } 2340 2341 static int check_src_coords(uint32_t src_x, uint32_t src_y, 2342 uint32_t src_w, uint32_t src_h, 2343 const struct drm_framebuffer *fb) 2344 { 2345 unsigned int fb_width, fb_height; 2346 2347 fb_width = fb->width << 16; 2348 fb_height = fb->height << 16; 2349 2350 /* Make sure source coordinates are inside the fb. */ 2351 if (src_w > fb_width || 2352 src_x > fb_width - src_w || 2353 src_h > fb_height || 2354 src_y > fb_height - src_h) { 2355 DRM_DEBUG_KMS("Invalid source coordinates " 2356 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2357 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2358 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2359 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2360 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2361 return -ENOSPC; 2362 } 2363 2364 return 0; 2365 } 2366 2367 /* 2368 * setplane_internal - setplane handler for internal callers 2369 * 2370 * Note that we assume an extra reference has already been taken on fb. If the 2371 * update fails, this reference will be dropped before return; if it succeeds, 2372 * the previous framebuffer (if any) will be unreferenced instead. 2373 * 2374 * src_{x,y,w,h} are provided in 16.16 fixed point format 2375 */ 2376 static int __setplane_internal(struct drm_plane *plane, 2377 struct drm_crtc *crtc, 2378 struct drm_framebuffer *fb, 2379 int32_t crtc_x, int32_t crtc_y, 2380 uint32_t crtc_w, uint32_t crtc_h, 2381 /* src_{x,y,w,h} values are 16.16 fixed point */ 2382 uint32_t src_x, uint32_t src_y, 2383 uint32_t src_w, uint32_t src_h) 2384 { 2385 int ret = 0; 2386 2387 /* No fb means shut it down */ 2388 if (!fb) { 2389 plane->old_fb = plane->fb; 2390 ret = plane->funcs->disable_plane(plane); 2391 if (!ret) { 2392 plane->crtc = NULL; 2393 plane->fb = NULL; 2394 } else { 2395 plane->old_fb = NULL; 2396 } 2397 goto out; 2398 } 2399 2400 /* Check whether this plane is usable on this CRTC */ 2401 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2402 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2403 ret = -EINVAL; 2404 goto out; 2405 } 2406 2407 /* Check whether this plane supports the fb pixel format. */ 2408 ret = drm_plane_check_pixel_format(plane, fb->pixel_format); 2409 if (ret) { 2410 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2411 drm_get_format_name(fb->pixel_format)); 2412 goto out; 2413 } 2414 2415 /* Give drivers some help against integer overflows */ 2416 if (crtc_w > INT_MAX || 2417 crtc_x > INT_MAX - (int32_t) crtc_w || 2418 crtc_h > INT_MAX || 2419 crtc_y > INT_MAX - (int32_t) crtc_h) { 2420 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2421 crtc_w, crtc_h, crtc_x, crtc_y); 2422 ret = -ERANGE; 2423 goto out; 2424 } 2425 2426 ret = check_src_coords(src_x, src_y, src_w, src_h, fb); 2427 if (ret) 2428 goto out; 2429 2430 plane->old_fb = plane->fb; 2431 ret = plane->funcs->update_plane(plane, crtc, fb, 2432 crtc_x, crtc_y, crtc_w, crtc_h, 2433 src_x, src_y, src_w, src_h); 2434 if (!ret) { 2435 plane->crtc = crtc; 2436 plane->fb = fb; 2437 fb = NULL; 2438 } else { 2439 plane->old_fb = NULL; 2440 } 2441 2442 out: 2443 if (fb) 2444 drm_framebuffer_unreference(fb); 2445 if (plane->old_fb) 2446 drm_framebuffer_unreference(plane->old_fb); 2447 plane->old_fb = NULL; 2448 2449 return ret; 2450 } 2451 2452 static int setplane_internal(struct drm_plane *plane, 2453 struct drm_crtc *crtc, 2454 struct drm_framebuffer *fb, 2455 int32_t crtc_x, int32_t crtc_y, 2456 uint32_t crtc_w, uint32_t crtc_h, 2457 /* src_{x,y,w,h} values are 16.16 fixed point */ 2458 uint32_t src_x, uint32_t src_y, 2459 uint32_t src_w, uint32_t src_h) 2460 { 2461 int ret; 2462 2463 drm_modeset_lock_all(plane->dev); 2464 ret = __setplane_internal(plane, crtc, fb, 2465 crtc_x, crtc_y, crtc_w, crtc_h, 2466 src_x, src_y, src_w, src_h); 2467 drm_modeset_unlock_all(plane->dev); 2468 2469 return ret; 2470 } 2471 2472 /** 2473 * drm_mode_setplane - configure a plane's configuration 2474 * @dev: DRM device 2475 * @data: ioctl data* 2476 * @file_priv: DRM file info 2477 * 2478 * Set plane configuration, including placement, fb, scaling, and other factors. 2479 * Or pass a NULL fb to disable (planes may be disabled without providing a 2480 * valid crtc). 2481 * 2482 * Returns: 2483 * Zero on success, negative errno on failure. 2484 */ 2485 int drm_mode_setplane(struct drm_device *dev, void *data, 2486 struct drm_file *file_priv) 2487 { 2488 struct drm_mode_set_plane *plane_req = data; 2489 struct drm_plane *plane; 2490 struct drm_crtc *crtc = NULL; 2491 struct drm_framebuffer *fb = NULL; 2492 2493 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2494 return -EINVAL; 2495 2496 /* 2497 * First, find the plane, crtc, and fb objects. If not available, 2498 * we don't bother to call the driver. 2499 */ 2500 plane = drm_plane_find(dev, plane_req->plane_id); 2501 if (!plane) { 2502 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2503 plane_req->plane_id); 2504 return -ENOENT; 2505 } 2506 2507 if (plane_req->fb_id) { 2508 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2509 if (!fb) { 2510 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2511 plane_req->fb_id); 2512 return -ENOENT; 2513 } 2514 2515 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2516 if (!crtc) { 2517 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2518 plane_req->crtc_id); 2519 return -ENOENT; 2520 } 2521 } 2522 2523 /* 2524 * setplane_internal will take care of deref'ing either the old or new 2525 * framebuffer depending on success. 2526 */ 2527 return setplane_internal(plane, crtc, fb, 2528 plane_req->crtc_x, plane_req->crtc_y, 2529 plane_req->crtc_w, plane_req->crtc_h, 2530 plane_req->src_x, plane_req->src_y, 2531 plane_req->src_w, plane_req->src_h); 2532 } 2533 2534 /** 2535 * drm_mode_set_config_internal - helper to call ->set_config 2536 * @set: modeset config to set 2537 * 2538 * This is a little helper to wrap internal calls to the ->set_config driver 2539 * interface. The only thing it adds is correct refcounting dance. 2540 * 2541 * Returns: 2542 * Zero on success, negative errno on failure. 2543 */ 2544 int drm_mode_set_config_internal(struct drm_mode_set *set) 2545 { 2546 struct drm_crtc *crtc = set->crtc; 2547 struct drm_framebuffer *fb; 2548 struct drm_crtc *tmp; 2549 int ret; 2550 2551 /* 2552 * NOTE: ->set_config can also disable other crtcs (if we steal all 2553 * connectors from it), hence we need to refcount the fbs across all 2554 * crtcs. Atomic modeset will have saner semantics ... 2555 */ 2556 drm_for_each_crtc(tmp, crtc->dev) 2557 tmp->primary->old_fb = tmp->primary->fb; 2558 2559 fb = set->fb; 2560 2561 ret = crtc->funcs->set_config(set); 2562 if (ret == 0) { 2563 crtc->primary->crtc = crtc; 2564 crtc->primary->fb = fb; 2565 } 2566 2567 drm_for_each_crtc(tmp, crtc->dev) { 2568 if (tmp->primary->fb) 2569 drm_framebuffer_reference(tmp->primary->fb); 2570 if (tmp->primary->old_fb) 2571 drm_framebuffer_unreference(tmp->primary->old_fb); 2572 tmp->primary->old_fb = NULL; 2573 } 2574 2575 return ret; 2576 } 2577 EXPORT_SYMBOL(drm_mode_set_config_internal); 2578 2579 /** 2580 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode 2581 * @mode: mode to query 2582 * @hdisplay: hdisplay value to fill in 2583 * @vdisplay: vdisplay value to fill in 2584 * 2585 * The vdisplay value will be doubled if the specified mode is a stereo mode of 2586 * the appropriate layout. 2587 */ 2588 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, 2589 int *hdisplay, int *vdisplay) 2590 { 2591 struct drm_display_mode adjusted; 2592 2593 drm_mode_copy(&adjusted, mode); 2594 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 2595 *hdisplay = adjusted.crtc_hdisplay; 2596 *vdisplay = adjusted.crtc_vdisplay; 2597 } 2598 EXPORT_SYMBOL(drm_crtc_get_hv_timing); 2599 2600 /** 2601 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2602 * CRTC viewport 2603 * @crtc: CRTC that framebuffer will be displayed on 2604 * @x: x panning 2605 * @y: y panning 2606 * @mode: mode that framebuffer will be displayed under 2607 * @fb: framebuffer to check size of 2608 */ 2609 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2610 int x, int y, 2611 const struct drm_display_mode *mode, 2612 const struct drm_framebuffer *fb) 2613 2614 { 2615 int hdisplay, vdisplay; 2616 2617 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); 2618 2619 if (crtc->state && 2620 crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) | 2621 BIT(DRM_ROTATE_270))) 2622 swap(hdisplay, vdisplay); 2623 2624 return check_src_coords(x << 16, y << 16, 2625 hdisplay << 16, vdisplay << 16, fb); 2626 } 2627 EXPORT_SYMBOL(drm_crtc_check_viewport); 2628 2629 /** 2630 * drm_mode_setcrtc - set CRTC configuration 2631 * @dev: drm device for the ioctl 2632 * @data: data pointer for the ioctl 2633 * @file_priv: drm file for the ioctl call 2634 * 2635 * Build a new CRTC configuration based on user request. 2636 * 2637 * Called by the user via ioctl. 2638 * 2639 * Returns: 2640 * Zero on success, negative errno on failure. 2641 */ 2642 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2643 struct drm_file *file_priv) 2644 { 2645 struct drm_mode_config *config = &dev->mode_config; 2646 struct drm_mode_crtc *crtc_req = data; 2647 struct drm_crtc *crtc; 2648 struct drm_connector **connector_set = NULL, *connector; 2649 struct drm_framebuffer *fb = NULL; 2650 struct drm_display_mode *mode = NULL; 2651 struct drm_mode_set set; 2652 uint32_t __user *set_connectors_ptr; 2653 int ret; 2654 int i; 2655 2656 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2657 return -EINVAL; 2658 2659 /* 2660 * Universal plane src offsets are only 16.16, prevent havoc for 2661 * drivers using universal plane code internally. 2662 */ 2663 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) 2664 return -ERANGE; 2665 2666 drm_modeset_lock_all(dev); 2667 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2668 if (!crtc) { 2669 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2670 ret = -ENOENT; 2671 goto out; 2672 } 2673 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 2674 2675 if (crtc_req->mode_valid) { 2676 /* If we have a mode we need a framebuffer. */ 2677 /* If we pass -1, set the mode with the currently bound fb */ 2678 if (crtc_req->fb_id == -1) { 2679 if (!crtc->primary->fb) { 2680 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2681 ret = -EINVAL; 2682 goto out; 2683 } 2684 fb = crtc->primary->fb; 2685 /* Make refcounting symmetric with the lookup path. */ 2686 drm_framebuffer_reference(fb); 2687 } else { 2688 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2689 if (!fb) { 2690 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2691 crtc_req->fb_id); 2692 ret = -ENOENT; 2693 goto out; 2694 } 2695 } 2696 2697 mode = drm_mode_create(dev); 2698 if (!mode) { 2699 ret = -ENOMEM; 2700 goto out; 2701 } 2702 2703 ret = drm_mode_convert_umode(mode, &crtc_req->mode); 2704 if (ret) { 2705 DRM_DEBUG_KMS("Invalid mode\n"); 2706 goto out; 2707 } 2708 2709 /* 2710 * Check whether the primary plane supports the fb pixel format. 2711 * Drivers not implementing the universal planes API use a 2712 * default formats list provided by the DRM core which doesn't 2713 * match real hardware capabilities. Skip the check in that 2714 * case. 2715 */ 2716 if (!crtc->primary->format_default) { 2717 ret = drm_plane_check_pixel_format(crtc->primary, 2718 fb->pixel_format); 2719 if (ret) { 2720 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2721 drm_get_format_name(fb->pixel_format)); 2722 goto out; 2723 } 2724 } 2725 2726 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2727 mode, fb); 2728 if (ret) 2729 goto out; 2730 2731 } 2732 2733 if (crtc_req->count_connectors == 0 && mode) { 2734 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2735 ret = -EINVAL; 2736 goto out; 2737 } 2738 2739 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2740 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2741 crtc_req->count_connectors); 2742 ret = -EINVAL; 2743 goto out; 2744 } 2745 2746 if (crtc_req->count_connectors > 0) { 2747 u32 out_id; 2748 2749 /* Avoid unbounded kernel memory allocation */ 2750 if (crtc_req->count_connectors > config->num_connector) { 2751 ret = -EINVAL; 2752 goto out; 2753 } 2754 2755 connector_set = kmalloc_array(crtc_req->count_connectors, 2756 sizeof(struct drm_connector *), 2757 GFP_KERNEL); 2758 if (!connector_set) { 2759 ret = -ENOMEM; 2760 goto out; 2761 } 2762 2763 for (i = 0; i < crtc_req->count_connectors; i++) { 2764 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2765 if (get_user(out_id, &set_connectors_ptr[i])) { 2766 ret = -EFAULT; 2767 goto out; 2768 } 2769 2770 connector = drm_connector_find(dev, out_id); 2771 if (!connector) { 2772 DRM_DEBUG_KMS("Connector id %d unknown\n", 2773 out_id); 2774 ret = -ENOENT; 2775 goto out; 2776 } 2777 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2778 connector->base.id, 2779 connector->name); 2780 2781 connector_set[i] = connector; 2782 } 2783 } 2784 2785 set.crtc = crtc; 2786 set.x = crtc_req->x; 2787 set.y = crtc_req->y; 2788 set.mode = mode; 2789 set.connectors = connector_set; 2790 set.num_connectors = crtc_req->count_connectors; 2791 set.fb = fb; 2792 ret = drm_mode_set_config_internal(&set); 2793 2794 out: 2795 if (fb) 2796 drm_framebuffer_unreference(fb); 2797 2798 kfree(connector_set); 2799 drm_mode_destroy(dev, mode); 2800 drm_modeset_unlock_all(dev); 2801 return ret; 2802 } 2803 2804 /** 2805 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2806 * universal plane handler call 2807 * @crtc: crtc to update cursor for 2808 * @req: data pointer for the ioctl 2809 * @file_priv: drm file for the ioctl call 2810 * 2811 * Legacy cursor ioctl's work directly with driver buffer handles. To 2812 * translate legacy ioctl calls into universal plane handler calls, we need to 2813 * wrap the native buffer handle in a drm_framebuffer. 2814 * 2815 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2816 * buffer with a pitch of 4*width; the universal plane interface should be used 2817 * directly in cases where the hardware can support other buffer settings and 2818 * userspace wants to make use of these capabilities. 2819 * 2820 * Returns: 2821 * Zero on success, negative errno on failure. 2822 */ 2823 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2824 struct drm_mode_cursor2 *req, 2825 struct drm_file *file_priv) 2826 { 2827 struct drm_device *dev = crtc->dev; 2828 struct drm_framebuffer *fb = NULL; 2829 struct drm_mode_fb_cmd2 fbreq = { 2830 .width = req->width, 2831 .height = req->height, 2832 .pixel_format = DRM_FORMAT_ARGB8888, 2833 .pitches = { req->width * 4 }, 2834 .handles = { req->handle }, 2835 }; 2836 int32_t crtc_x, crtc_y; 2837 uint32_t crtc_w = 0, crtc_h = 0; 2838 uint32_t src_w = 0, src_h = 0; 2839 int ret = 0; 2840 2841 BUG_ON(!crtc->cursor); 2842 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2843 2844 /* 2845 * Obtain fb we'll be using (either new or existing) and take an extra 2846 * reference to it if fb != null. setplane will take care of dropping 2847 * the reference if the plane update fails. 2848 */ 2849 if (req->flags & DRM_MODE_CURSOR_BO) { 2850 if (req->handle) { 2851 fb = internal_framebuffer_create(dev, &fbreq, file_priv); 2852 if (IS_ERR(fb)) { 2853 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2854 return PTR_ERR(fb); 2855 } 2856 } else { 2857 fb = NULL; 2858 } 2859 } else { 2860 fb = crtc->cursor->fb; 2861 if (fb) 2862 drm_framebuffer_reference(fb); 2863 } 2864 2865 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2866 crtc_x = req->x; 2867 crtc_y = req->y; 2868 } else { 2869 crtc_x = crtc->cursor_x; 2870 crtc_y = crtc->cursor_y; 2871 } 2872 2873 if (fb) { 2874 crtc_w = fb->width; 2875 crtc_h = fb->height; 2876 src_w = fb->width << 16; 2877 src_h = fb->height << 16; 2878 } 2879 2880 /* 2881 * setplane_internal will take care of deref'ing either the old or new 2882 * framebuffer depending on success. 2883 */ 2884 ret = __setplane_internal(crtc->cursor, crtc, fb, 2885 crtc_x, crtc_y, crtc_w, crtc_h, 2886 0, 0, src_w, src_h); 2887 2888 /* Update successful; save new cursor position, if necessary */ 2889 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2890 crtc->cursor_x = req->x; 2891 crtc->cursor_y = req->y; 2892 } 2893 2894 return ret; 2895 } 2896 2897 static int drm_mode_cursor_common(struct drm_device *dev, 2898 struct drm_mode_cursor2 *req, 2899 struct drm_file *file_priv) 2900 { 2901 struct drm_crtc *crtc; 2902 int ret = 0; 2903 2904 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2905 return -EINVAL; 2906 2907 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 2908 return -EINVAL; 2909 2910 crtc = drm_crtc_find(dev, req->crtc_id); 2911 if (!crtc) { 2912 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 2913 return -ENOENT; 2914 } 2915 2916 /* 2917 * If this crtc has a universal cursor plane, call that plane's update 2918 * handler rather than using legacy cursor handlers. 2919 */ 2920 drm_modeset_lock_crtc(crtc, crtc->cursor); 2921 if (crtc->cursor) { 2922 ret = drm_mode_cursor_universal(crtc, req, file_priv); 2923 goto out; 2924 } 2925 2926 if (req->flags & DRM_MODE_CURSOR_BO) { 2927 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 2928 ret = -ENXIO; 2929 goto out; 2930 } 2931 /* Turns off the cursor if handle is 0 */ 2932 if (crtc->funcs->cursor_set2) 2933 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 2934 req->width, req->height, req->hot_x, req->hot_y); 2935 else 2936 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 2937 req->width, req->height); 2938 } 2939 2940 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2941 if (crtc->funcs->cursor_move) { 2942 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 2943 } else { 2944 ret = -EFAULT; 2945 goto out; 2946 } 2947 } 2948 out: 2949 drm_modeset_unlock_crtc(crtc); 2950 2951 return ret; 2952 2953 } 2954 2955 2956 /** 2957 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 2958 * @dev: drm device for the ioctl 2959 * @data: data pointer for the ioctl 2960 * @file_priv: drm file for the ioctl call 2961 * 2962 * Set the cursor configuration based on user request. 2963 * 2964 * Called by the user via ioctl. 2965 * 2966 * Returns: 2967 * Zero on success, negative errno on failure. 2968 */ 2969 int drm_mode_cursor_ioctl(struct drm_device *dev, 2970 void *data, struct drm_file *file_priv) 2971 { 2972 struct drm_mode_cursor *req = data; 2973 struct drm_mode_cursor2 new_req; 2974 2975 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 2976 new_req.hot_x = new_req.hot_y = 0; 2977 2978 return drm_mode_cursor_common(dev, &new_req, file_priv); 2979 } 2980 2981 /** 2982 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 2983 * @dev: drm device for the ioctl 2984 * @data: data pointer for the ioctl 2985 * @file_priv: drm file for the ioctl call 2986 * 2987 * Set the cursor configuration based on user request. This implements the 2nd 2988 * version of the cursor ioctl, which allows userspace to additionally specify 2989 * the hotspot of the pointer. 2990 * 2991 * Called by the user via ioctl. 2992 * 2993 * Returns: 2994 * Zero on success, negative errno on failure. 2995 */ 2996 int drm_mode_cursor2_ioctl(struct drm_device *dev, 2997 void *data, struct drm_file *file_priv) 2998 { 2999 struct drm_mode_cursor2 *req = data; 3000 3001 return drm_mode_cursor_common(dev, req, file_priv); 3002 } 3003 3004 /** 3005 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 3006 * @bpp: bits per pixels 3007 * @depth: bit depth per pixel 3008 * 3009 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 3010 * Useful in fbdev emulation code, since that deals in those values. 3011 */ 3012 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 3013 { 3014 uint32_t fmt; 3015 3016 switch (bpp) { 3017 case 8: 3018 fmt = DRM_FORMAT_C8; 3019 break; 3020 case 16: 3021 if (depth == 15) 3022 fmt = DRM_FORMAT_XRGB1555; 3023 else 3024 fmt = DRM_FORMAT_RGB565; 3025 break; 3026 case 24: 3027 fmt = DRM_FORMAT_RGB888; 3028 break; 3029 case 32: 3030 if (depth == 24) 3031 fmt = DRM_FORMAT_XRGB8888; 3032 else if (depth == 30) 3033 fmt = DRM_FORMAT_XRGB2101010; 3034 else 3035 fmt = DRM_FORMAT_ARGB8888; 3036 break; 3037 default: 3038 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3039 fmt = DRM_FORMAT_XRGB8888; 3040 break; 3041 } 3042 3043 return fmt; 3044 } 3045 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3046 3047 /** 3048 * drm_mode_addfb - add an FB to the graphics configuration 3049 * @dev: drm device for the ioctl 3050 * @data: data pointer for the ioctl 3051 * @file_priv: drm file for the ioctl call 3052 * 3053 * Add a new FB to the specified CRTC, given a user request. This is the 3054 * original addfb ioctl which only supported RGB formats. 3055 * 3056 * Called by the user via ioctl. 3057 * 3058 * Returns: 3059 * Zero on success, negative errno on failure. 3060 */ 3061 int drm_mode_addfb(struct drm_device *dev, 3062 void *data, struct drm_file *file_priv) 3063 { 3064 struct drm_mode_fb_cmd *or = data; 3065 struct drm_mode_fb_cmd2 r = {}; 3066 int ret; 3067 3068 /* convert to new format and call new ioctl */ 3069 r.fb_id = or->fb_id; 3070 r.width = or->width; 3071 r.height = or->height; 3072 r.pitches[0] = or->pitch; 3073 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3074 r.handles[0] = or->handle; 3075 3076 ret = drm_mode_addfb2(dev, &r, file_priv); 3077 if (ret) 3078 return ret; 3079 3080 or->fb_id = r.fb_id; 3081 3082 return 0; 3083 } 3084 3085 static int format_check(const struct drm_mode_fb_cmd2 *r) 3086 { 3087 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3088 3089 switch (format) { 3090 case DRM_FORMAT_C8: 3091 case DRM_FORMAT_RGB332: 3092 case DRM_FORMAT_BGR233: 3093 case DRM_FORMAT_XRGB4444: 3094 case DRM_FORMAT_XBGR4444: 3095 case DRM_FORMAT_RGBX4444: 3096 case DRM_FORMAT_BGRX4444: 3097 case DRM_FORMAT_ARGB4444: 3098 case DRM_FORMAT_ABGR4444: 3099 case DRM_FORMAT_RGBA4444: 3100 case DRM_FORMAT_BGRA4444: 3101 case DRM_FORMAT_XRGB1555: 3102 case DRM_FORMAT_XBGR1555: 3103 case DRM_FORMAT_RGBX5551: 3104 case DRM_FORMAT_BGRX5551: 3105 case DRM_FORMAT_ARGB1555: 3106 case DRM_FORMAT_ABGR1555: 3107 case DRM_FORMAT_RGBA5551: 3108 case DRM_FORMAT_BGRA5551: 3109 case DRM_FORMAT_RGB565: 3110 case DRM_FORMAT_BGR565: 3111 case DRM_FORMAT_RGB888: 3112 case DRM_FORMAT_BGR888: 3113 case DRM_FORMAT_XRGB8888: 3114 case DRM_FORMAT_XBGR8888: 3115 case DRM_FORMAT_RGBX8888: 3116 case DRM_FORMAT_BGRX8888: 3117 case DRM_FORMAT_ARGB8888: 3118 case DRM_FORMAT_ABGR8888: 3119 case DRM_FORMAT_RGBA8888: 3120 case DRM_FORMAT_BGRA8888: 3121 case DRM_FORMAT_XRGB2101010: 3122 case DRM_FORMAT_XBGR2101010: 3123 case DRM_FORMAT_RGBX1010102: 3124 case DRM_FORMAT_BGRX1010102: 3125 case DRM_FORMAT_ARGB2101010: 3126 case DRM_FORMAT_ABGR2101010: 3127 case DRM_FORMAT_RGBA1010102: 3128 case DRM_FORMAT_BGRA1010102: 3129 case DRM_FORMAT_YUYV: 3130 case DRM_FORMAT_YVYU: 3131 case DRM_FORMAT_UYVY: 3132 case DRM_FORMAT_VYUY: 3133 case DRM_FORMAT_AYUV: 3134 case DRM_FORMAT_NV12: 3135 case DRM_FORMAT_NV21: 3136 case DRM_FORMAT_NV16: 3137 case DRM_FORMAT_NV61: 3138 case DRM_FORMAT_NV24: 3139 case DRM_FORMAT_NV42: 3140 case DRM_FORMAT_YUV410: 3141 case DRM_FORMAT_YVU410: 3142 case DRM_FORMAT_YUV411: 3143 case DRM_FORMAT_YVU411: 3144 case DRM_FORMAT_YUV420: 3145 case DRM_FORMAT_YVU420: 3146 case DRM_FORMAT_YUV422: 3147 case DRM_FORMAT_YVU422: 3148 case DRM_FORMAT_YUV444: 3149 case DRM_FORMAT_YVU444: 3150 return 0; 3151 default: 3152 DRM_DEBUG_KMS("invalid pixel format %s\n", 3153 drm_get_format_name(r->pixel_format)); 3154 return -EINVAL; 3155 } 3156 } 3157 3158 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3159 { 3160 int ret, hsub, vsub, num_planes, i; 3161 3162 ret = format_check(r); 3163 if (ret) { 3164 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3165 drm_get_format_name(r->pixel_format)); 3166 return ret; 3167 } 3168 3169 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3170 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3171 num_planes = drm_format_num_planes(r->pixel_format); 3172 3173 if (r->width == 0 || r->width % hsub) { 3174 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3175 return -EINVAL; 3176 } 3177 3178 if (r->height == 0 || r->height % vsub) { 3179 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3180 return -EINVAL; 3181 } 3182 3183 for (i = 0; i < num_planes; i++) { 3184 unsigned int width = r->width / (i != 0 ? hsub : 1); 3185 unsigned int height = r->height / (i != 0 ? vsub : 1); 3186 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3187 3188 if (!r->handles[i]) { 3189 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3190 return -EINVAL; 3191 } 3192 3193 if ((uint64_t) width * cpp > UINT_MAX) 3194 return -ERANGE; 3195 3196 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3197 return -ERANGE; 3198 3199 if (r->pitches[i] < width * cpp) { 3200 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3201 return -EINVAL; 3202 } 3203 3204 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { 3205 DRM_DEBUG_KMS("bad fb modifier %"PRIu64" for plane %d\n", 3206 r->modifier[i], i); 3207 return -EINVAL; 3208 } 3209 3210 /* modifier specific checks: */ 3211 switch (r->modifier[i]) { 3212 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: 3213 /* NOTE: the pitch restriction may be lifted later if it turns 3214 * out that no hw has this restriction: 3215 */ 3216 if (r->pixel_format != DRM_FORMAT_NV12 || 3217 width % 128 || height % 32 || 3218 r->pitches[i] % 128) { 3219 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i); 3220 return -EINVAL; 3221 } 3222 break; 3223 3224 default: 3225 break; 3226 } 3227 } 3228 3229 for (i = num_planes; i < 4; i++) { 3230 if (r->modifier[i]) { 3231 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i); 3232 return -EINVAL; 3233 } 3234 3235 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ 3236 if (!(r->flags & DRM_MODE_FB_MODIFIERS)) 3237 continue; 3238 3239 if (r->handles[i]) { 3240 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i); 3241 return -EINVAL; 3242 } 3243 3244 if (r->pitches[i]) { 3245 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i); 3246 return -EINVAL; 3247 } 3248 3249 if (r->offsets[i]) { 3250 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i); 3251 return -EINVAL; 3252 } 3253 } 3254 3255 return 0; 3256 } 3257 3258 static struct drm_framebuffer * 3259 internal_framebuffer_create(struct drm_device *dev, 3260 struct drm_mode_fb_cmd2 *r, 3261 struct drm_file *file_priv) 3262 { 3263 struct drm_mode_config *config = &dev->mode_config; 3264 struct drm_framebuffer *fb; 3265 int ret; 3266 3267 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { 3268 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3269 return ERR_PTR(-EINVAL); 3270 } 3271 3272 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3273 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3274 r->width, config->min_width, config->max_width); 3275 return ERR_PTR(-EINVAL); 3276 } 3277 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3278 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3279 r->height, config->min_height, config->max_height); 3280 return ERR_PTR(-EINVAL); 3281 } 3282 3283 if (r->flags & DRM_MODE_FB_MODIFIERS && 3284 !dev->mode_config.allow_fb_modifiers) { 3285 DRM_DEBUG_KMS("driver does not support fb modifiers\n"); 3286 return ERR_PTR(-EINVAL); 3287 } 3288 3289 ret = framebuffer_check(r); 3290 if (ret) 3291 return ERR_PTR(ret); 3292 3293 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3294 if (IS_ERR(fb)) { 3295 DRM_DEBUG_KMS("could not create framebuffer\n"); 3296 return fb; 3297 } 3298 3299 return fb; 3300 } 3301 3302 /** 3303 * drm_mode_addfb2 - add an FB to the graphics configuration 3304 * @dev: drm device for the ioctl 3305 * @data: data pointer for the ioctl 3306 * @file_priv: drm file for the ioctl call 3307 * 3308 * Add a new FB to the specified CRTC, given a user request with format. This is 3309 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3310 * and uses fourcc codes as pixel format specifiers. 3311 * 3312 * Called by the user via ioctl. 3313 * 3314 * Returns: 3315 * Zero on success, negative errno on failure. 3316 */ 3317 int drm_mode_addfb2(struct drm_device *dev, 3318 void *data, struct drm_file *file_priv) 3319 { 3320 struct drm_mode_fb_cmd2 *r = data; 3321 struct drm_framebuffer *fb; 3322 3323 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3324 return -EINVAL; 3325 3326 fb = internal_framebuffer_create(dev, r, file_priv); 3327 if (IS_ERR(fb)) 3328 return PTR_ERR(fb); 3329 3330 /* Transfer ownership to the filp for reaping on close */ 3331 3332 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3333 mutex_lock(&file_priv->fbs_lock); 3334 r->fb_id = fb->base.id; 3335 list_add(&fb->filp_head, &file_priv->fbs); 3336 mutex_unlock(&file_priv->fbs_lock); 3337 3338 return 0; 3339 } 3340 3341 struct drm_mode_rmfb_work { 3342 struct work_struct work; 3343 struct list_head fbs; 3344 }; 3345 3346 static void drm_mode_rmfb_work_fn(struct work_struct *w) 3347 { 3348 struct drm_mode_rmfb_work *arg = container_of(w, typeof(*arg), work); 3349 3350 while (!list_empty(&arg->fbs)) { 3351 struct drm_framebuffer *fb = 3352 list_first_entry(&arg->fbs, typeof(*fb), filp_head); 3353 3354 list_del_init(&fb->filp_head); 3355 drm_framebuffer_remove(fb); 3356 } 3357 } 3358 3359 /** 3360 * drm_mode_rmfb - remove an FB from the configuration 3361 * @dev: drm device for the ioctl 3362 * @data: data pointer for the ioctl 3363 * @file_priv: drm file for the ioctl call 3364 * 3365 * Remove the FB specified by the user. 3366 * 3367 * Called by the user via ioctl. 3368 * 3369 * Returns: 3370 * Zero on success, negative errno on failure. 3371 */ 3372 int drm_mode_rmfb(struct drm_device *dev, 3373 void *data, struct drm_file *file_priv) 3374 { 3375 struct drm_framebuffer *fb = NULL; 3376 struct drm_framebuffer *fbl = NULL; 3377 uint32_t *id = data; 3378 int found = 0; 3379 3380 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3381 return -EINVAL; 3382 3383 mutex_lock(&file_priv->fbs_lock); 3384 mutex_lock(&dev->mode_config.fb_lock); 3385 fb = __drm_framebuffer_lookup(dev, *id); 3386 if (!fb) 3387 goto fail_lookup; 3388 3389 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3390 if (fb == fbl) 3391 found = 1; 3392 if (!found) 3393 goto fail_lookup; 3394 3395 list_del_init(&fb->filp_head); 3396 mutex_unlock(&dev->mode_config.fb_lock); 3397 mutex_unlock(&file_priv->fbs_lock); 3398 3399 /* 3400 * we now own the reference that was stored in the fbs list 3401 * 3402 * drm_framebuffer_remove may fail with -EINTR on pending signals, 3403 * so run this in a separate stack as there's no way to correctly 3404 * handle this after the fb is already removed from the lookup table. 3405 */ 3406 if (!kref_exclusive_p(&fb->refcount)) { 3407 struct drm_mode_rmfb_work arg; 3408 3409 INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); 3410 INIT_LIST_HEAD(&arg.fbs); 3411 list_add_tail(&fb->filp_head, &arg.fbs); 3412 3413 schedule_work(&arg.work); 3414 flush_work(&arg.work); 3415 destroy_work_on_stack(&arg.work); 3416 } else 3417 drm_framebuffer_unreference(fb); 3418 3419 return 0; 3420 3421 fail_lookup: 3422 mutex_unlock(&dev->mode_config.fb_lock); 3423 mutex_unlock(&file_priv->fbs_lock); 3424 3425 return -ENOENT; 3426 } 3427 3428 /** 3429 * drm_mode_getfb - get FB info 3430 * @dev: drm device for the ioctl 3431 * @data: data pointer for the ioctl 3432 * @file_priv: drm file for the ioctl call 3433 * 3434 * Lookup the FB given its ID and return info about it. 3435 * 3436 * Called by the user via ioctl. 3437 * 3438 * Returns: 3439 * Zero on success, negative errno on failure. 3440 */ 3441 int drm_mode_getfb(struct drm_device *dev, 3442 void *data, struct drm_file *file_priv) 3443 { 3444 struct drm_mode_fb_cmd *r = data; 3445 struct drm_framebuffer *fb; 3446 int ret; 3447 3448 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3449 return -EINVAL; 3450 3451 fb = drm_framebuffer_lookup(dev, r->fb_id); 3452 if (!fb) 3453 return -ENOENT; 3454 3455 r->height = fb->height; 3456 r->width = fb->width; 3457 r->depth = fb->depth; 3458 r->bpp = fb->bits_per_pixel; 3459 r->pitch = fb->pitches[0]; 3460 if (fb->funcs->create_handle) { 3461 if (file_priv->is_master || capable(CAP_SYS_ADMIN) || 3462 drm_is_control_client(file_priv)) { 3463 ret = fb->funcs->create_handle(fb, file_priv, 3464 &r->handle); 3465 } else { 3466 /* GET_FB() is an unprivileged ioctl so we must not 3467 * return a buffer-handle to non-master processes! For 3468 * backwards-compatibility reasons, we cannot make 3469 * GET_FB() privileged, so just return an invalid handle 3470 * for non-masters. */ 3471 r->handle = 0; 3472 ret = 0; 3473 } 3474 } else { 3475 ret = -ENODEV; 3476 } 3477 3478 drm_framebuffer_unreference(fb); 3479 3480 return ret; 3481 } 3482 3483 /** 3484 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3485 * @dev: drm device for the ioctl 3486 * @data: data pointer for the ioctl 3487 * @file_priv: drm file for the ioctl call 3488 * 3489 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3490 * rectangle list. Generic userspace which does frontbuffer rendering must call 3491 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3492 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3493 * 3494 * Modesetting drivers which always update the frontbuffer do not need to 3495 * implement the corresponding ->dirty framebuffer callback. 3496 * 3497 * Called by the user via ioctl. 3498 * 3499 * Returns: 3500 * Zero on success, negative errno on failure. 3501 */ 3502 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3503 void *data, struct drm_file *file_priv) 3504 { 3505 struct drm_clip_rect __user *clips_ptr; 3506 struct drm_clip_rect *clips = NULL; 3507 struct drm_mode_fb_dirty_cmd *r = data; 3508 struct drm_framebuffer *fb; 3509 unsigned flags; 3510 int num_clips; 3511 int ret; 3512 3513 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3514 return -EINVAL; 3515 3516 fb = drm_framebuffer_lookup(dev, r->fb_id); 3517 if (!fb) 3518 return -ENOENT; 3519 3520 num_clips = r->num_clips; 3521 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3522 3523 if (!num_clips != !clips_ptr) { 3524 ret = -EINVAL; 3525 goto out_err1; 3526 } 3527 3528 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3529 3530 /* If userspace annotates copy, clips must come in pairs */ 3531 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3532 ret = -EINVAL; 3533 goto out_err1; 3534 } 3535 3536 if (num_clips && clips_ptr) { 3537 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3538 ret = -EINVAL; 3539 goto out_err1; 3540 } 3541 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); 3542 if (!clips) { 3543 ret = -ENOMEM; 3544 goto out_err1; 3545 } 3546 3547 ret = copy_from_user(clips, clips_ptr, 3548 num_clips * sizeof(*clips)); 3549 if (ret) { 3550 ret = -EFAULT; 3551 goto out_err2; 3552 } 3553 } 3554 3555 if (fb->funcs->dirty) { 3556 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3557 clips, num_clips); 3558 } else { 3559 ret = -ENOSYS; 3560 } 3561 3562 out_err2: 3563 kfree(clips); 3564 out_err1: 3565 drm_framebuffer_unreference(fb); 3566 3567 return ret; 3568 } 3569 3570 /** 3571 * drm_fb_release - remove and free the FBs on this file 3572 * @priv: drm file for the ioctl 3573 * 3574 * Destroy all the FBs associated with @filp. 3575 * 3576 * Called by the user via ioctl. 3577 * 3578 * Returns: 3579 * Zero on success, negative errno on failure. 3580 */ 3581 void drm_fb_release(struct drm_file *priv) 3582 { 3583 struct drm_framebuffer *fb, *tfb; 3584 struct drm_mode_rmfb_work arg; 3585 3586 INIT_LIST_HEAD(&arg.fbs); 3587 3588 /* 3589 * When the file gets released that means no one else can access the fb 3590 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3591 * avoid upsetting lockdep since the universal cursor code adds a 3592 * framebuffer while holding mutex locks. 3593 * 3594 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3595 * locks is impossible here since no one else but this function can get 3596 * at it any more. 3597 */ 3598 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3599 if (!kref_exclusive_p(&fb->refcount)) { 3600 list_move_tail(&fb->filp_head, &arg.fbs); 3601 } else { 3602 list_del_init(&fb->filp_head); 3603 3604 /* This drops the fpriv->fbs reference. */ 3605 drm_framebuffer_unreference(fb); 3606 } 3607 } 3608 3609 if (!list_empty(&arg.fbs)) { 3610 INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); 3611 3612 schedule_work(&arg.work); 3613 flush_work(&arg.work); 3614 destroy_work_on_stack(&arg.work); 3615 } 3616 } 3617 3618 /** 3619 * drm_property_create - create a new property type 3620 * @dev: drm device 3621 * @flags: flags specifying the property type 3622 * @name: name of the property 3623 * @num_values: number of pre-defined values 3624 * 3625 * This creates a new generic drm property which can then be attached to a drm 3626 * object with drm_object_attach_property. The returned property object must be 3627 * freed with drm_property_destroy. 3628 * 3629 * Note that the DRM core keeps a per-device list of properties and that, if 3630 * drm_mode_config_cleanup() is called, it will destroy all properties created 3631 * by the driver. 3632 * 3633 * Returns: 3634 * A pointer to the newly created property on success, NULL on failure. 3635 */ 3636 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3637 const char *name, int num_values) 3638 { 3639 struct drm_property *property = NULL; 3640 int ret; 3641 3642 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3643 if (!property) 3644 return NULL; 3645 3646 property->dev = dev; 3647 3648 if (num_values) { 3649 property->values = kcalloc(num_values, sizeof(uint64_t), 3650 GFP_KERNEL); 3651 if (!property->values) 3652 goto fail; 3653 } 3654 3655 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3656 if (ret) 3657 goto fail; 3658 3659 property->flags = flags; 3660 property->num_values = num_values; 3661 INIT_LIST_HEAD(&property->enum_list); 3662 3663 if (name) { 3664 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3665 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3666 } 3667 3668 list_add_tail(&property->head, &dev->mode_config.property_list); 3669 3670 WARN_ON(!drm_property_type_valid(property)); 3671 3672 return property; 3673 fail: 3674 kfree(property->values); 3675 kfree(property); 3676 return NULL; 3677 } 3678 EXPORT_SYMBOL(drm_property_create); 3679 3680 /** 3681 * drm_property_create_enum - create a new enumeration property type 3682 * @dev: drm device 3683 * @flags: flags specifying the property type 3684 * @name: name of the property 3685 * @props: enumeration lists with property values 3686 * @num_values: number of pre-defined values 3687 * 3688 * This creates a new generic drm property which can then be attached to a drm 3689 * object with drm_object_attach_property. The returned property object must be 3690 * freed with drm_property_destroy. 3691 * 3692 * Userspace is only allowed to set one of the predefined values for enumeration 3693 * properties. 3694 * 3695 * Returns: 3696 * A pointer to the newly created property on success, NULL on failure. 3697 */ 3698 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3699 const char *name, 3700 const struct drm_prop_enum_list *props, 3701 int num_values) 3702 { 3703 struct drm_property *property; 3704 int i, ret; 3705 3706 flags |= DRM_MODE_PROP_ENUM; 3707 3708 property = drm_property_create(dev, flags, name, num_values); 3709 if (!property) 3710 return NULL; 3711 3712 for (i = 0; i < num_values; i++) { 3713 ret = drm_property_add_enum(property, i, 3714 props[i].type, 3715 props[i].name); 3716 if (ret) { 3717 drm_property_destroy(dev, property); 3718 return NULL; 3719 } 3720 } 3721 3722 return property; 3723 } 3724 EXPORT_SYMBOL(drm_property_create_enum); 3725 3726 /** 3727 * drm_property_create_bitmask - create a new bitmask property type 3728 * @dev: drm device 3729 * @flags: flags specifying the property type 3730 * @name: name of the property 3731 * @props: enumeration lists with property bitflags 3732 * @num_props: size of the @props array 3733 * @supported_bits: bitmask of all supported enumeration values 3734 * 3735 * This creates a new bitmask drm property which can then be attached to a drm 3736 * object with drm_object_attach_property. The returned property object must be 3737 * freed with drm_property_destroy. 3738 * 3739 * Compared to plain enumeration properties userspace is allowed to set any 3740 * or'ed together combination of the predefined property bitflag values 3741 * 3742 * Returns: 3743 * A pointer to the newly created property on success, NULL on failure. 3744 */ 3745 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3746 int flags, const char *name, 3747 const struct drm_prop_enum_list *props, 3748 int num_props, 3749 uint64_t supported_bits) 3750 { 3751 struct drm_property *property; 3752 int i, ret, index = 0; 3753 int num_values = hweight64(supported_bits); 3754 3755 flags |= DRM_MODE_PROP_BITMASK; 3756 3757 property = drm_property_create(dev, flags, name, num_values); 3758 if (!property) 3759 return NULL; 3760 for (i = 0; i < num_props; i++) { 3761 if (!(supported_bits & (1ULL << props[i].type))) 3762 continue; 3763 3764 if (WARN_ON(index >= num_values)) { 3765 drm_property_destroy(dev, property); 3766 return NULL; 3767 } 3768 3769 ret = drm_property_add_enum(property, index++, 3770 props[i].type, 3771 props[i].name); 3772 if (ret) { 3773 drm_property_destroy(dev, property); 3774 return NULL; 3775 } 3776 } 3777 3778 return property; 3779 } 3780 EXPORT_SYMBOL(drm_property_create_bitmask); 3781 3782 static struct drm_property *property_create_range(struct drm_device *dev, 3783 int flags, const char *name, 3784 uint64_t min, uint64_t max) 3785 { 3786 struct drm_property *property; 3787 3788 property = drm_property_create(dev, flags, name, 2); 3789 if (!property) 3790 return NULL; 3791 3792 property->values[0] = min; 3793 property->values[1] = max; 3794 3795 return property; 3796 } 3797 3798 /** 3799 * drm_property_create_range - create a new unsigned ranged property type 3800 * @dev: drm device 3801 * @flags: flags specifying the property type 3802 * @name: name of the property 3803 * @min: minimum value of the property 3804 * @max: maximum value of the property 3805 * 3806 * This creates a new generic drm property which can then be attached to a drm 3807 * object with drm_object_attach_property. The returned property object must be 3808 * freed with drm_property_destroy. 3809 * 3810 * Userspace is allowed to set any unsigned integer value in the (min, max) 3811 * range inclusive. 3812 * 3813 * Returns: 3814 * A pointer to the newly created property on success, NULL on failure. 3815 */ 3816 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3817 const char *name, 3818 uint64_t min, uint64_t max) 3819 { 3820 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3821 name, min, max); 3822 } 3823 EXPORT_SYMBOL(drm_property_create_range); 3824 3825 /** 3826 * drm_property_create_signed_range - create a new signed ranged property type 3827 * @dev: drm device 3828 * @flags: flags specifying the property type 3829 * @name: name of the property 3830 * @min: minimum value of the property 3831 * @max: maximum value of the property 3832 * 3833 * This creates a new generic drm property which can then be attached to a drm 3834 * object with drm_object_attach_property. The returned property object must be 3835 * freed with drm_property_destroy. 3836 * 3837 * Userspace is allowed to set any signed integer value in the (min, max) 3838 * range inclusive. 3839 * 3840 * Returns: 3841 * A pointer to the newly created property on success, NULL on failure. 3842 */ 3843 struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3844 int flags, const char *name, 3845 int64_t min, int64_t max) 3846 { 3847 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3848 name, I642U64(min), I642U64(max)); 3849 } 3850 EXPORT_SYMBOL(drm_property_create_signed_range); 3851 3852 /** 3853 * drm_property_create_object - create a new object property type 3854 * @dev: drm device 3855 * @flags: flags specifying the property type 3856 * @name: name of the property 3857 * @type: object type from DRM_MODE_OBJECT_* defines 3858 * 3859 * This creates a new generic drm property which can then be attached to a drm 3860 * object with drm_object_attach_property. The returned property object must be 3861 * freed with drm_property_destroy. 3862 * 3863 * Userspace is only allowed to set this to any property value of the given 3864 * @type. Only useful for atomic properties, which is enforced. 3865 * 3866 * Returns: 3867 * A pointer to the newly created property on success, NULL on failure. 3868 */ 3869 struct drm_property *drm_property_create_object(struct drm_device *dev, 3870 int flags, const char *name, uint32_t type) 3871 { 3872 struct drm_property *property; 3873 3874 flags |= DRM_MODE_PROP_OBJECT; 3875 3876 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) 3877 return NULL; 3878 3879 property = drm_property_create(dev, flags, name, 1); 3880 if (!property) 3881 return NULL; 3882 3883 property->values[0] = type; 3884 3885 return property; 3886 } 3887 EXPORT_SYMBOL(drm_property_create_object); 3888 3889 /** 3890 * drm_property_create_bool - create a new boolean property type 3891 * @dev: drm device 3892 * @flags: flags specifying the property type 3893 * @name: name of the property 3894 * 3895 * This creates a new generic drm property which can then be attached to a drm 3896 * object with drm_object_attach_property. The returned property object must be 3897 * freed with drm_property_destroy. 3898 * 3899 * This is implemented as a ranged property with only {0, 1} as valid values. 3900 * 3901 * Returns: 3902 * A pointer to the newly created property on success, NULL on failure. 3903 */ 3904 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, 3905 const char *name) 3906 { 3907 return drm_property_create_range(dev, flags, name, 0, 1); 3908 } 3909 EXPORT_SYMBOL(drm_property_create_bool); 3910 3911 /** 3912 * drm_property_add_enum - add a possible value to an enumeration property 3913 * @property: enumeration property to change 3914 * @index: index of the new enumeration 3915 * @value: value of the new enumeration 3916 * @name: symbolic name of the new enumeration 3917 * 3918 * This functions adds enumerations to a property. 3919 * 3920 * It's use is deprecated, drivers should use one of the more specific helpers 3921 * to directly create the property with all enumerations already attached. 3922 * 3923 * Returns: 3924 * Zero on success, error code on failure. 3925 */ 3926 int drm_property_add_enum(struct drm_property *property, int index, 3927 uint64_t value, const char *name) 3928 { 3929 struct drm_property_enum *prop_enum; 3930 3931 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3932 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3933 return -EINVAL; 3934 3935 /* 3936 * Bitmask enum properties have the additional constraint of values 3937 * from 0 to 63 3938 */ 3939 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3940 (value > 63)) 3941 return -EINVAL; 3942 3943 if (!list_empty(&property->enum_list)) { 3944 list_for_each_entry(prop_enum, &property->enum_list, head) { 3945 if (prop_enum->value == value) { 3946 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3947 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3948 return 0; 3949 } 3950 } 3951 } 3952 3953 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3954 if (!prop_enum) 3955 return -ENOMEM; 3956 3957 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3958 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3959 prop_enum->value = value; 3960 3961 property->values[index] = value; 3962 list_add_tail(&prop_enum->head, &property->enum_list); 3963 return 0; 3964 } 3965 EXPORT_SYMBOL(drm_property_add_enum); 3966 3967 /** 3968 * drm_property_destroy - destroy a drm property 3969 * @dev: drm device 3970 * @property: property to destry 3971 * 3972 * This function frees a property including any attached resources like 3973 * enumeration values. 3974 */ 3975 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 3976 { 3977 struct drm_property_enum *prop_enum, *pt; 3978 3979 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 3980 list_del(&prop_enum->head); 3981 kfree(prop_enum); 3982 } 3983 3984 if (property->num_values) 3985 kfree(property->values); 3986 drm_mode_object_put(dev, &property->base); 3987 list_del(&property->head); 3988 kfree(property); 3989 } 3990 EXPORT_SYMBOL(drm_property_destroy); 3991 3992 /** 3993 * drm_object_attach_property - attach a property to a modeset object 3994 * @obj: drm modeset object 3995 * @property: property to attach 3996 * @init_val: initial value of the property 3997 * 3998 * This attaches the given property to the modeset object with the given initial 3999 * value. Currently this function cannot fail since the properties are stored in 4000 * a statically sized array. 4001 */ 4002 void drm_object_attach_property(struct drm_mode_object *obj, 4003 struct drm_property *property, 4004 uint64_t init_val) 4005 { 4006 int count = obj->properties->count; 4007 4008 if (count == DRM_OBJECT_MAX_PROPERTY) { 4009 WARN(1, "Failed to attach object property (type: 0x%x). Please " 4010 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 4011 "you see this message on the same object type.\n", 4012 obj->type); 4013 return; 4014 } 4015 4016 obj->properties->properties[count] = property; 4017 obj->properties->values[count] = init_val; 4018 obj->properties->count++; 4019 if (property->flags & DRM_MODE_PROP_ATOMIC) 4020 obj->properties->atomic_count++; 4021 } 4022 EXPORT_SYMBOL(drm_object_attach_property); 4023 4024 /** 4025 * drm_object_property_set_value - set the value of a property 4026 * @obj: drm mode object to set property value for 4027 * @property: property to set 4028 * @val: value the property should be set to 4029 * 4030 * This functions sets a given property on a given object. This function only 4031 * changes the software state of the property, it does not call into the 4032 * driver's ->set_property callback. 4033 * 4034 * Returns: 4035 * Zero on success, error code on failure. 4036 */ 4037 int drm_object_property_set_value(struct drm_mode_object *obj, 4038 struct drm_property *property, uint64_t val) 4039 { 4040 int i; 4041 4042 for (i = 0; i < obj->properties->count; i++) { 4043 if (obj->properties->properties[i] == property) { 4044 obj->properties->values[i] = val; 4045 return 0; 4046 } 4047 } 4048 4049 return -EINVAL; 4050 } 4051 EXPORT_SYMBOL(drm_object_property_set_value); 4052 4053 /** 4054 * drm_object_property_get_value - retrieve the value of a property 4055 * @obj: drm mode object to get property value from 4056 * @property: property to retrieve 4057 * @val: storage for the property value 4058 * 4059 * This function retrieves the softare state of the given property for the given 4060 * property. Since there is no driver callback to retrieve the current property 4061 * value this might be out of sync with the hardware, depending upon the driver 4062 * and property. 4063 * 4064 * Returns: 4065 * Zero on success, error code on failure. 4066 */ 4067 int drm_object_property_get_value(struct drm_mode_object *obj, 4068 struct drm_property *property, uint64_t *val) 4069 { 4070 int i; 4071 4072 /* read-only properties bypass atomic mechanism and still store 4073 * their value in obj->properties->values[].. mostly to avoid 4074 * having to deal w/ EDID and similar props in atomic paths: 4075 */ 4076 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && 4077 !(property->flags & DRM_MODE_PROP_IMMUTABLE)) 4078 return drm_atomic_get_property(obj, property, val); 4079 4080 for (i = 0; i < obj->properties->count; i++) { 4081 if (obj->properties->properties[i] == property) { 4082 *val = obj->properties->values[i]; 4083 return 0; 4084 } 4085 } 4086 4087 return -EINVAL; 4088 } 4089 EXPORT_SYMBOL(drm_object_property_get_value); 4090 4091 /** 4092 * drm_mode_getproperty_ioctl - get the property metadata 4093 * @dev: DRM device 4094 * @data: ioctl data 4095 * @file_priv: DRM file info 4096 * 4097 * This function retrieves the metadata for a given property, like the different 4098 * possible values for an enum property or the limits for a range property. 4099 * 4100 * Blob properties are special 4101 * 4102 * Called by the user via ioctl. 4103 * 4104 * Returns: 4105 * Zero on success, negative errno on failure. 4106 */ 4107 int drm_mode_getproperty_ioctl(struct drm_device *dev, 4108 void *data, struct drm_file *file_priv) 4109 { 4110 struct drm_mode_get_property *out_resp = data; 4111 struct drm_property *property; 4112 int enum_count = 0; 4113 int value_count = 0; 4114 int ret = 0, i; 4115 int copied; 4116 struct drm_property_enum *prop_enum; 4117 struct drm_mode_property_enum __user *enum_ptr; 4118 uint64_t __user *values_ptr; 4119 4120 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4121 return -EINVAL; 4122 4123 drm_modeset_lock_all(dev); 4124 property = drm_property_find(dev, out_resp->prop_id); 4125 if (!property) { 4126 ret = -ENOENT; 4127 goto done; 4128 } 4129 4130 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4131 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4132 list_for_each_entry(prop_enum, &property->enum_list, head) 4133 enum_count++; 4134 } 4135 4136 value_count = property->num_values; 4137 4138 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 4139 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 4140 out_resp->flags = property->flags; 4141 4142 if ((out_resp->count_values >= value_count) && value_count) { 4143 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 4144 for (i = 0; i < value_count; i++) { 4145 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 4146 ret = -EFAULT; 4147 goto done; 4148 } 4149 } 4150 } 4151 out_resp->count_values = value_count; 4152 4153 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4154 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4155 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 4156 copied = 0; 4157 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 4158 list_for_each_entry(prop_enum, &property->enum_list, head) { 4159 4160 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 4161 ret = -EFAULT; 4162 goto done; 4163 } 4164 4165 if (copy_to_user(&enum_ptr[copied].name, 4166 &prop_enum->name, DRM_PROP_NAME_LEN)) { 4167 ret = -EFAULT; 4168 goto done; 4169 } 4170 copied++; 4171 } 4172 } 4173 out_resp->count_enum_blobs = enum_count; 4174 } 4175 4176 /* 4177 * NOTE: The idea seems to have been to use this to read all the blob 4178 * property values. But nothing ever added them to the corresponding 4179 * list, userspace always used the special-purpose get_blob ioctl to 4180 * read the value for a blob property. It also doesn't make a lot of 4181 * sense to return values here when everything else is just metadata for 4182 * the property itself. 4183 */ 4184 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4185 out_resp->count_enum_blobs = 0; 4186 done: 4187 drm_modeset_unlock_all(dev); 4188 return ret; 4189 } 4190 4191 /** 4192 * drm_property_create_blob - Create new blob property 4193 * 4194 * Creates a new blob property for a specified DRM device, optionally 4195 * copying data. 4196 * 4197 * @dev: DRM device to create property for 4198 * @length: Length to allocate for blob data 4199 * @data: If specified, copies data into blob 4200 * 4201 * Returns: 4202 * New blob property with a single reference on success, or an ERR_PTR 4203 * value on failure. 4204 */ 4205 struct drm_property_blob * 4206 drm_property_create_blob(struct drm_device *dev, size_t length, 4207 const void *data) 4208 { 4209 struct drm_property_blob *blob; 4210 int ret; 4211 4212 if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob)) 4213 return ERR_PTR(-EINVAL); 4214 4215 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4216 if (!blob) 4217 return ERR_PTR(-ENOMEM); 4218 4219 /* This must be explicitly initialised, so we can safely call list_del 4220 * on it in the removal handler, even if it isn't in a file list. */ 4221 INIT_LIST_HEAD(&blob->head_file); 4222 blob->length = length; 4223 blob->dev = dev; 4224 4225 if (data) 4226 memcpy(blob->data, data, length); 4227 4228 mutex_lock(&dev->mode_config.blob_lock); 4229 4230 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 4231 if (ret) { 4232 kfree(blob); 4233 mutex_unlock(&dev->mode_config.blob_lock); 4234 return ERR_PTR(-EINVAL); 4235 } 4236 4237 kref_init(&blob->refcount); 4238 4239 list_add_tail(&blob->head_global, 4240 &dev->mode_config.property_blob_list); 4241 4242 mutex_unlock(&dev->mode_config.blob_lock); 4243 4244 return blob; 4245 } 4246 EXPORT_SYMBOL(drm_property_create_blob); 4247 4248 /** 4249 * drm_property_free_blob - Blob property destructor 4250 * 4251 * Internal free function for blob properties; must not be used directly. 4252 * 4253 * @kref: Reference 4254 */ 4255 static void drm_property_free_blob(struct kref *kref) 4256 { 4257 struct drm_property_blob *blob = 4258 container_of(kref, struct drm_property_blob, refcount); 4259 4260 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock)); 4261 4262 list_del(&blob->head_global); 4263 list_del(&blob->head_file); 4264 drm_mode_object_put(blob->dev, &blob->base); 4265 4266 kfree(blob); 4267 } 4268 4269 /** 4270 * drm_property_unreference_blob - Unreference a blob property 4271 * 4272 * Drop a reference on a blob property. May free the object. 4273 * 4274 * @blob: Pointer to blob property 4275 */ 4276 void drm_property_unreference_blob(struct drm_property_blob *blob) 4277 { 4278 struct drm_device *dev; 4279 4280 if (!blob) 4281 return; 4282 4283 dev = blob->dev; 4284 4285 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, blob->refcount.kr_count); 4286 4287 if (kref_put_mutex(&blob->refcount, drm_property_free_blob, 4288 &dev->mode_config.blob_lock)) 4289 mutex_unlock(&dev->mode_config.blob_lock); 4290 else 4291 might_lock(&dev->mode_config.blob_lock); 4292 } 4293 EXPORT_SYMBOL(drm_property_unreference_blob); 4294 4295 /** 4296 * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held 4297 * 4298 * Drop a reference on a blob property. May free the object. This must be 4299 * called with blob_lock held. 4300 * 4301 * @blob: Pointer to blob property 4302 */ 4303 static void drm_property_unreference_blob_locked(struct drm_property_blob *blob) 4304 { 4305 if (!blob) 4306 return; 4307 4308 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, blob->refcount.kr_count); 4309 4310 kref_put(&blob->refcount, drm_property_free_blob); 4311 } 4312 4313 /** 4314 * drm_property_destroy_user_blobs - destroy all blobs created by this client 4315 * @dev: DRM device 4316 * @file_priv: destroy all blobs owned by this file handle 4317 */ 4318 void drm_property_destroy_user_blobs(struct drm_device *dev, 4319 struct drm_file *file_priv) 4320 { 4321 struct drm_property_blob *blob, *bt; 4322 4323 mutex_lock(&dev->mode_config.blob_lock); 4324 4325 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) { 4326 list_del_init(&blob->head_file); 4327 drm_property_unreference_blob_locked(blob); 4328 } 4329 4330 mutex_unlock(&dev->mode_config.blob_lock); 4331 } 4332 4333 /** 4334 * drm_property_reference_blob - Take a reference on an existing property 4335 * 4336 * Take a new reference on an existing blob property. 4337 * 4338 * @blob: Pointer to blob property 4339 */ 4340 struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob) 4341 { 4342 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, blob->refcount.kr_count); 4343 kref_get(&blob->refcount); 4344 return blob; 4345 } 4346 EXPORT_SYMBOL(drm_property_reference_blob); 4347 4348 /* 4349 * Like drm_property_lookup_blob, but does not return an additional reference. 4350 * Must be called with blob_lock held. 4351 */ 4352 static struct drm_property_blob *__drm_property_lookup_blob(struct drm_device *dev, 4353 uint32_t id) 4354 { 4355 struct drm_mode_object *obj = NULL; 4356 struct drm_property_blob *blob; 4357 4358 WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock)); 4359 4360 mutex_lock(&dev->mode_config.idr_mutex); 4361 obj = idr_find(&dev->mode_config.crtc_idr, id); 4362 if (!obj || (obj->type != DRM_MODE_OBJECT_BLOB) || (obj->id != id)) 4363 blob = NULL; 4364 else 4365 blob = obj_to_blob(obj); 4366 mutex_unlock(&dev->mode_config.idr_mutex); 4367 4368 return blob; 4369 } 4370 4371 /** 4372 * drm_property_lookup_blob - look up a blob property and take a reference 4373 * @dev: drm device 4374 * @id: id of the blob property 4375 * 4376 * If successful, this takes an additional reference to the blob property. 4377 * callers need to make sure to eventually unreference the returned property 4378 * again, using @drm_property_unreference_blob. 4379 */ 4380 struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev, 4381 uint32_t id) 4382 { 4383 struct drm_property_blob *blob; 4384 4385 mutex_lock(&dev->mode_config.blob_lock); 4386 blob = __drm_property_lookup_blob(dev, id); 4387 if (blob) { 4388 if (!kref_get_unless_zero(&blob->refcount)) 4389 blob = NULL; 4390 } 4391 mutex_unlock(&dev->mode_config.blob_lock); 4392 4393 return blob; 4394 } 4395 EXPORT_SYMBOL(drm_property_lookup_blob); 4396 4397 /** 4398 * drm_property_replace_global_blob - atomically replace existing blob property 4399 * @dev: drm device 4400 * @replace: location of blob property pointer to be replaced 4401 * @length: length of data for new blob, or 0 for no data 4402 * @data: content for new blob, or NULL for no data 4403 * @obj_holds_id: optional object for property holding blob ID 4404 * @prop_holds_id: optional property holding blob ID 4405 * @return 0 on success or error on failure 4406 * 4407 * This function will atomically replace a global property in the blob list, 4408 * optionally updating a property which holds the ID of that property. It is 4409 * guaranteed to be atomic: no caller will be allowed to see intermediate 4410 * results, and either the entire operation will succeed and clean up the 4411 * previous property, or it will fail and the state will be unchanged. 4412 * 4413 * If length is 0 or data is NULL, no new blob will be created, and the holding 4414 * property, if specified, will be set to 0. 4415 * 4416 * Access to the replace pointer is assumed to be protected by the caller, e.g. 4417 * by holding the relevant modesetting object lock for its parent. 4418 * 4419 * For example, a drm_connector has a 'PATH' property, which contains the ID 4420 * of a blob property with the value of the MST path information. Calling this 4421 * function with replace pointing to the connector's path_blob_ptr, length and 4422 * data set for the new path information, obj_holds_id set to the connector's 4423 * base object, and prop_holds_id set to the path property name, will perform 4424 * a completely atomic update. The access to path_blob_ptr is protected by the 4425 * caller holding a lock on the connector. 4426 */ 4427 static int drm_property_replace_global_blob(struct drm_device *dev, 4428 struct drm_property_blob **replace, 4429 size_t length, 4430 const void *data, 4431 struct drm_mode_object *obj_holds_id, 4432 struct drm_property *prop_holds_id) 4433 { 4434 struct drm_property_blob *new_blob = NULL; 4435 struct drm_property_blob *old_blob = NULL; 4436 int ret; 4437 4438 WARN_ON(replace == NULL); 4439 4440 old_blob = *replace; 4441 4442 if (length && data) { 4443 new_blob = drm_property_create_blob(dev, length, data); 4444 if (IS_ERR(new_blob)) 4445 return PTR_ERR(new_blob); 4446 } 4447 4448 /* This does not need to be synchronised with blob_lock, as the 4449 * get_properties ioctl locks all modesetting objects, and 4450 * obj_holds_id must be locked before calling here, so we cannot 4451 * have its value out of sync with the list membership modified 4452 * below under blob_lock. */ 4453 if (obj_holds_id) { 4454 ret = drm_object_property_set_value(obj_holds_id, 4455 prop_holds_id, 4456 new_blob ? 4457 new_blob->base.id : 0); 4458 if (ret != 0) 4459 goto err_created; 4460 } 4461 4462 drm_property_unreference_blob(old_blob); 4463 *replace = new_blob; 4464 4465 return 0; 4466 4467 err_created: 4468 drm_property_unreference_blob(new_blob); 4469 return ret; 4470 } 4471 4472 /** 4473 * drm_mode_getblob_ioctl - get the contents of a blob property value 4474 * @dev: DRM device 4475 * @data: ioctl data 4476 * @file_priv: DRM file info 4477 * 4478 * This function retrieves the contents of a blob property. The value stored in 4479 * an object's blob property is just a normal modeset object id. 4480 * 4481 * Called by the user via ioctl. 4482 * 4483 * Returns: 4484 * Zero on success, negative errno on failure. 4485 */ 4486 int drm_mode_getblob_ioctl(struct drm_device *dev, 4487 void *data, struct drm_file *file_priv) 4488 { 4489 struct drm_mode_get_blob *out_resp = data; 4490 struct drm_property_blob *blob; 4491 int ret = 0; 4492 void __user *blob_ptr; 4493 4494 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4495 return -EINVAL; 4496 4497 drm_modeset_lock_all(dev); 4498 mutex_lock(&dev->mode_config.blob_lock); 4499 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4500 if (!blob) { 4501 ret = -ENOENT; 4502 goto done; 4503 } 4504 4505 if (out_resp->length == blob->length) { 4506 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4507 if (copy_to_user(blob_ptr, blob->data, blob->length)) { 4508 ret = -EFAULT; 4509 goto done; 4510 } 4511 } 4512 out_resp->length = blob->length; 4513 4514 done: 4515 mutex_unlock(&dev->mode_config.blob_lock); 4516 drm_modeset_unlock_all(dev); 4517 return ret; 4518 } 4519 4520 /** 4521 * drm_mode_createblob_ioctl - create a new blob property 4522 * @dev: DRM device 4523 * @data: ioctl data 4524 * @file_priv: DRM file info 4525 * 4526 * This function creates a new blob property with user-defined values. In order 4527 * to give us sensible validation and checking when creating, rather than at 4528 * every potential use, we also require a type to be provided upfront. 4529 * 4530 * Called by the user via ioctl. 4531 * 4532 * Returns: 4533 * Zero on success, negative errno on failure. 4534 */ 4535 int drm_mode_createblob_ioctl(struct drm_device *dev, 4536 void *data, struct drm_file *file_priv) 4537 { 4538 struct drm_mode_create_blob *out_resp = data; 4539 struct drm_property_blob *blob; 4540 void __user *blob_ptr; 4541 int ret = 0; 4542 4543 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4544 return -EINVAL; 4545 4546 blob = drm_property_create_blob(dev, out_resp->length, NULL); 4547 if (IS_ERR(blob)) 4548 return PTR_ERR(blob); 4549 4550 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4551 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) { 4552 ret = -EFAULT; 4553 goto out_blob; 4554 } 4555 4556 /* Dropping the lock between create_blob and our access here is safe 4557 * as only the same file_priv can remove the blob; at this point, it is 4558 * not associated with any file_priv. */ 4559 mutex_lock(&dev->mode_config.blob_lock); 4560 out_resp->blob_id = blob->base.id; 4561 list_add_tail(&blob->head_file, &file_priv->blobs); 4562 mutex_unlock(&dev->mode_config.blob_lock); 4563 4564 return 0; 4565 4566 out_blob: 4567 drm_property_unreference_blob(blob); 4568 return ret; 4569 } 4570 4571 /** 4572 * drm_mode_destroyblob_ioctl - destroy a user blob property 4573 * @dev: DRM device 4574 * @data: ioctl data 4575 * @file_priv: DRM file info 4576 * 4577 * Destroy an existing user-defined blob property. 4578 * 4579 * Called by the user via ioctl. 4580 * 4581 * Returns: 4582 * Zero on success, negative errno on failure. 4583 */ 4584 int drm_mode_destroyblob_ioctl(struct drm_device *dev, 4585 void *data, struct drm_file *file_priv) 4586 { 4587 struct drm_mode_destroy_blob *out_resp = data; 4588 struct drm_property_blob *blob = NULL, *bt; 4589 bool found = false; 4590 int ret = 0; 4591 4592 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4593 return -EINVAL; 4594 4595 mutex_lock(&dev->mode_config.blob_lock); 4596 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4597 if (!blob) { 4598 ret = -ENOENT; 4599 goto err; 4600 } 4601 4602 /* Ensure the property was actually created by this user. */ 4603 list_for_each_entry(bt, &file_priv->blobs, head_file) { 4604 if (bt == blob) { 4605 found = true; 4606 break; 4607 } 4608 } 4609 4610 if (!found) { 4611 ret = -EPERM; 4612 goto err; 4613 } 4614 4615 /* We must drop head_file here, because we may not be the last 4616 * reference on the blob. */ 4617 list_del_init(&blob->head_file); 4618 drm_property_unreference_blob_locked(blob); 4619 mutex_unlock(&dev->mode_config.blob_lock); 4620 4621 return 0; 4622 4623 err: 4624 mutex_unlock(&dev->mode_config.blob_lock); 4625 return ret; 4626 } 4627 4628 /** 4629 * drm_mode_connector_set_path_property - set tile property on connector 4630 * @connector: connector to set property on. 4631 * @path: path to use for property; must not be NULL. 4632 * 4633 * This creates a property to expose to userspace to specify a 4634 * connector path. This is mainly used for DisplayPort MST where 4635 * connectors have a topology and we want to allow userspace to give 4636 * them more meaningful names. 4637 * 4638 * Returns: 4639 * Zero on success, negative errno on failure. 4640 */ 4641 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4642 const char *path) 4643 { 4644 struct drm_device *dev = connector->dev; 4645 int ret; 4646 4647 ret = drm_property_replace_global_blob(dev, 4648 &connector->path_blob_ptr, 4649 strlen(path) + 1, 4650 path, 4651 &connector->base, 4652 dev->mode_config.path_property); 4653 return ret; 4654 } 4655 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4656 4657 /** 4658 * drm_mode_connector_set_tile_property - set tile property on connector 4659 * @connector: connector to set property on. 4660 * 4661 * This looks up the tile information for a connector, and creates a 4662 * property for userspace to parse if it exists. The property is of 4663 * the form of 8 integers using ':' as a separator. 4664 * 4665 * Returns: 4666 * Zero on success, errno on failure. 4667 */ 4668 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4669 { 4670 struct drm_device *dev = connector->dev; 4671 char tile[256]; 4672 int ret; 4673 4674 if (!connector->has_tile) { 4675 ret = drm_property_replace_global_blob(dev, 4676 &connector->tile_blob_ptr, 4677 0, 4678 NULL, 4679 &connector->base, 4680 dev->mode_config.tile_property); 4681 return ret; 4682 } 4683 4684 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4685 connector->tile_group->id, connector->tile_is_single_monitor, 4686 connector->num_h_tile, connector->num_v_tile, 4687 connector->tile_h_loc, connector->tile_v_loc, 4688 connector->tile_h_size, connector->tile_v_size); 4689 4690 ret = drm_property_replace_global_blob(dev, 4691 &connector->tile_blob_ptr, 4692 strlen(tile) + 1, 4693 tile, 4694 &connector->base, 4695 dev->mode_config.tile_property); 4696 return ret; 4697 } 4698 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4699 4700 /** 4701 * drm_mode_connector_update_edid_property - update the edid property of a connector 4702 * @connector: drm connector 4703 * @edid: new value of the edid property 4704 * 4705 * This function creates a new blob modeset object and assigns its id to the 4706 * connector's edid property. 4707 * 4708 * Returns: 4709 * Zero on success, negative errno on failure. 4710 */ 4711 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4712 const struct edid *edid) 4713 { 4714 struct drm_device *dev = connector->dev; 4715 size_t size = 0; 4716 int ret; 4717 4718 /* ignore requests to set edid when overridden */ 4719 if (connector->override_edid) 4720 return 0; 4721 4722 if (edid) 4723 size = EDID_LENGTH * (1 + edid->extensions); 4724 4725 ret = drm_property_replace_global_blob(dev, 4726 &connector->edid_blob_ptr, 4727 size, 4728 edid, 4729 &connector->base, 4730 dev->mode_config.edid_property); 4731 return ret; 4732 } 4733 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4734 4735 /* Some properties could refer to dynamic refcnt'd objects, or things that 4736 * need special locking to handle lifetime issues (ie. to ensure the prop 4737 * value doesn't become invalid part way through the property update due to 4738 * race). The value returned by reference via 'obj' should be passed back 4739 * to drm_property_change_valid_put() after the property is set (and the 4740 * object to which the property is attached has a chance to take it's own 4741 * reference). 4742 */ 4743 bool drm_property_change_valid_get(struct drm_property *property, 4744 uint64_t value, struct drm_mode_object **ref) 4745 { 4746 int i; 4747 4748 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4749 return false; 4750 4751 *ref = NULL; 4752 4753 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4754 if (value < property->values[0] || value > property->values[1]) 4755 return false; 4756 return true; 4757 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4758 int64_t svalue = U642I64(value); 4759 4760 if (svalue < U642I64(property->values[0]) || 4761 svalue > U642I64(property->values[1])) 4762 return false; 4763 return true; 4764 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4765 uint64_t valid_mask = 0; 4766 4767 for (i = 0; i < property->num_values; i++) 4768 valid_mask |= (1ULL << property->values[i]); 4769 return !(value & ~valid_mask); 4770 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4771 struct drm_property_blob *blob; 4772 4773 if (value == 0) 4774 return true; 4775 4776 blob = drm_property_lookup_blob(property->dev, value); 4777 if (blob) { 4778 *ref = &blob->base; 4779 return true; 4780 } else { 4781 return false; 4782 } 4783 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4784 /* a zero value for an object property translates to null: */ 4785 if (value == 0) 4786 return true; 4787 4788 /* handle refcnt'd objects specially: */ 4789 if (property->values[0] == DRM_MODE_OBJECT_FB) { 4790 struct drm_framebuffer *fb; 4791 fb = drm_framebuffer_lookup(property->dev, value); 4792 if (fb) { 4793 *ref = &fb->base; 4794 return true; 4795 } else { 4796 return false; 4797 } 4798 } else { 4799 return _object_find(property->dev, value, property->values[0]) != NULL; 4800 } 4801 } 4802 4803 for (i = 0; i < property->num_values; i++) 4804 if (property->values[i] == value) 4805 return true; 4806 return false; 4807 } 4808 4809 void drm_property_change_valid_put(struct drm_property *property, 4810 struct drm_mode_object *ref) 4811 { 4812 if (!ref) 4813 return; 4814 4815 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4816 if (property->values[0] == DRM_MODE_OBJECT_FB) 4817 drm_framebuffer_unreference(obj_to_fb(ref)); 4818 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4819 drm_property_unreference_blob(obj_to_blob(ref)); 4820 } 4821 4822 /** 4823 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4824 * @dev: DRM device 4825 * @data: ioctl data 4826 * @file_priv: DRM file info 4827 * 4828 * This function sets the current value for a connectors's property. It also 4829 * calls into a driver's ->set_property callback to update the hardware state 4830 * 4831 * Called by the user via ioctl. 4832 * 4833 * Returns: 4834 * Zero on success, negative errno on failure. 4835 */ 4836 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4837 void *data, struct drm_file *file_priv) 4838 { 4839 struct drm_mode_connector_set_property *conn_set_prop = data; 4840 struct drm_mode_obj_set_property obj_set_prop = { 4841 .value = conn_set_prop->value, 4842 .prop_id = conn_set_prop->prop_id, 4843 .obj_id = conn_set_prop->connector_id, 4844 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4845 }; 4846 4847 /* It does all the locking and checking we need */ 4848 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4849 } 4850 4851 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4852 struct drm_property *property, 4853 uint64_t value) 4854 { 4855 int ret = -EINVAL; 4856 struct drm_connector *connector = obj_to_connector(obj); 4857 4858 /* Do DPMS ourselves */ 4859 if (property == connector->dev->mode_config.dpms_property) { 4860 ret = 0; 4861 if (connector->funcs->dpms) 4862 ret = (*connector->funcs->dpms)(connector, (int)value); 4863 } else if (connector->funcs->set_property) 4864 ret = connector->funcs->set_property(connector, property, value); 4865 4866 /* store the property value if successful */ 4867 if (!ret) 4868 drm_object_property_set_value(&connector->base, property, value); 4869 return ret; 4870 } 4871 4872 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4873 struct drm_property *property, 4874 uint64_t value) 4875 { 4876 int ret = -EINVAL; 4877 struct drm_crtc *crtc = obj_to_crtc(obj); 4878 4879 if (crtc->funcs->set_property) 4880 ret = crtc->funcs->set_property(crtc, property, value); 4881 if (!ret) 4882 drm_object_property_set_value(obj, property, value); 4883 4884 return ret; 4885 } 4886 4887 /** 4888 * drm_mode_plane_set_obj_prop - set the value of a property 4889 * @plane: drm plane object to set property value for 4890 * @property: property to set 4891 * @value: value the property should be set to 4892 * 4893 * This functions sets a given property on a given plane object. This function 4894 * calls the driver's ->set_property callback and changes the software state of 4895 * the property if the callback succeeds. 4896 * 4897 * Returns: 4898 * Zero on success, error code on failure. 4899 */ 4900 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4901 struct drm_property *property, 4902 uint64_t value) 4903 { 4904 int ret = -EINVAL; 4905 struct drm_mode_object *obj = &plane->base; 4906 4907 if (plane->funcs->set_property) 4908 ret = plane->funcs->set_property(plane, property, value); 4909 if (!ret) 4910 drm_object_property_set_value(obj, property, value); 4911 4912 return ret; 4913 } 4914 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4915 4916 /** 4917 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 4918 * @dev: DRM device 4919 * @data: ioctl data 4920 * @file_priv: DRM file info 4921 * 4922 * This function retrieves the current value for an object's property. Compared 4923 * to the connector specific ioctl this one is extended to also work on crtc and 4924 * plane objects. 4925 * 4926 * Called by the user via ioctl. 4927 * 4928 * Returns: 4929 * Zero on success, negative errno on failure. 4930 */ 4931 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4932 struct drm_file *file_priv) 4933 { 4934 struct drm_mode_obj_get_properties *arg = data; 4935 struct drm_mode_object *obj; 4936 int ret = 0; 4937 4938 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4939 return -EINVAL; 4940 4941 drm_modeset_lock_all(dev); 4942 4943 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4944 if (!obj) { 4945 ret = -ENOENT; 4946 goto out; 4947 } 4948 if (!obj->properties) { 4949 ret = -EINVAL; 4950 goto out; 4951 } 4952 4953 ret = get_properties(obj, file_priv->atomic, 4954 (uint32_t __user *)(unsigned long)(arg->props_ptr), 4955 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), 4956 &arg->count_props); 4957 4958 out: 4959 drm_modeset_unlock_all(dev); 4960 return ret; 4961 } 4962 4963 /** 4964 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 4965 * @dev: DRM device 4966 * @data: ioctl data 4967 * @file_priv: DRM file info 4968 * 4969 * This function sets the current value for an object's property. It also calls 4970 * into a driver's ->set_property callback to update the hardware state. 4971 * Compared to the connector specific ioctl this one is extended to also work on 4972 * crtc and plane objects. 4973 * 4974 * Called by the user via ioctl. 4975 * 4976 * Returns: 4977 * Zero on success, negative errno on failure. 4978 */ 4979 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 4980 struct drm_file *file_priv) 4981 { 4982 struct drm_mode_obj_set_property *arg = data; 4983 struct drm_mode_object *arg_obj; 4984 struct drm_mode_object *prop_obj; 4985 struct drm_property *property; 4986 int i, ret = -EINVAL; 4987 struct drm_mode_object *ref; 4988 4989 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4990 return -EINVAL; 4991 4992 drm_modeset_lock_all(dev); 4993 4994 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4995 if (!arg_obj) { 4996 ret = -ENOENT; 4997 goto out; 4998 } 4999 if (!arg_obj->properties) 5000 goto out; 5001 5002 for (i = 0; i < arg_obj->properties->count; i++) 5003 if (arg_obj->properties->properties[i]->base.id == arg->prop_id) 5004 break; 5005 5006 if (i == arg_obj->properties->count) 5007 goto out; 5008 5009 prop_obj = drm_mode_object_find(dev, arg->prop_id, 5010 DRM_MODE_OBJECT_PROPERTY); 5011 if (!prop_obj) { 5012 ret = -ENOENT; 5013 goto out; 5014 } 5015 property = obj_to_property(prop_obj); 5016 5017 if (!drm_property_change_valid_get(property, arg->value, &ref)) 5018 goto out; 5019 5020 switch (arg_obj->type) { 5021 case DRM_MODE_OBJECT_CONNECTOR: 5022 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 5023 arg->value); 5024 break; 5025 case DRM_MODE_OBJECT_CRTC: 5026 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 5027 break; 5028 case DRM_MODE_OBJECT_PLANE: 5029 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 5030 property, arg->value); 5031 break; 5032 } 5033 5034 drm_property_change_valid_put(property, ref); 5035 5036 out: 5037 drm_modeset_unlock_all(dev); 5038 return ret; 5039 } 5040 5041 /** 5042 * drm_mode_connector_attach_encoder - attach a connector to an encoder 5043 * @connector: connector to attach 5044 * @encoder: encoder to attach @connector to 5045 * 5046 * This function links up a connector to an encoder. Note that the routing 5047 * restrictions between encoders and crtcs are exposed to userspace through the 5048 * possible_clones and possible_crtcs bitmasks. 5049 * 5050 * Returns: 5051 * Zero on success, negative errno on failure. 5052 */ 5053 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 5054 struct drm_encoder *encoder) 5055 { 5056 int i; 5057 5058 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 5059 if (connector->encoder_ids[i] == 0) { 5060 connector->encoder_ids[i] = encoder->base.id; 5061 return 0; 5062 } 5063 } 5064 return -ENOMEM; 5065 } 5066 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 5067 5068 /** 5069 * drm_mode_crtc_set_gamma_size - set the gamma table size 5070 * @crtc: CRTC to set the gamma table size for 5071 * @gamma_size: size of the gamma table 5072 * 5073 * Drivers which support gamma tables should set this to the supported gamma 5074 * table size when initializing the CRTC. Currently the drm core only supports a 5075 * fixed gamma table size. 5076 * 5077 * Returns: 5078 * Zero on success, negative errno on failure. 5079 */ 5080 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 5081 int gamma_size) 5082 { 5083 crtc->gamma_size = gamma_size; 5084 5085 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, 5086 GFP_KERNEL); 5087 if (!crtc->gamma_store) { 5088 crtc->gamma_size = 0; 5089 return -ENOMEM; 5090 } 5091 5092 return 0; 5093 } 5094 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 5095 5096 /** 5097 * drm_mode_gamma_set_ioctl - set the gamma table 5098 * @dev: DRM device 5099 * @data: ioctl data 5100 * @file_priv: DRM file info 5101 * 5102 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 5103 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 5104 * 5105 * Called by the user via ioctl. 5106 * 5107 * Returns: 5108 * Zero on success, negative errno on failure. 5109 */ 5110 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 5111 void *data, struct drm_file *file_priv) 5112 { 5113 struct drm_mode_crtc_lut *crtc_lut = data; 5114 struct drm_crtc *crtc; 5115 void *r_base, *g_base, *b_base; 5116 int size; 5117 int ret = 0; 5118 5119 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5120 return -EINVAL; 5121 5122 drm_modeset_lock_all(dev); 5123 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5124 if (!crtc) { 5125 ret = -ENOENT; 5126 goto out; 5127 } 5128 5129 if (crtc->funcs->gamma_set == NULL) { 5130 ret = -ENOSYS; 5131 goto out; 5132 } 5133 5134 /* memcpy into gamma store */ 5135 if (crtc_lut->gamma_size != crtc->gamma_size) { 5136 ret = -EINVAL; 5137 goto out; 5138 } 5139 5140 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5141 r_base = crtc->gamma_store; 5142 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 5143 ret = -EFAULT; 5144 goto out; 5145 } 5146 5147 g_base = r_base + size; 5148 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 5149 ret = -EFAULT; 5150 goto out; 5151 } 5152 5153 b_base = g_base + size; 5154 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 5155 ret = -EFAULT; 5156 goto out; 5157 } 5158 5159 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 5160 5161 out: 5162 drm_modeset_unlock_all(dev); 5163 return ret; 5164 5165 } 5166 5167 /** 5168 * drm_mode_gamma_get_ioctl - get the gamma table 5169 * @dev: DRM device 5170 * @data: ioctl data 5171 * @file_priv: DRM file info 5172 * 5173 * Copy the current gamma table into the storage provided. This also provides 5174 * the gamma table size the driver expects, which can be used to size the 5175 * allocated storage. 5176 * 5177 * Called by the user via ioctl. 5178 * 5179 * Returns: 5180 * Zero on success, negative errno on failure. 5181 */ 5182 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 5183 void *data, struct drm_file *file_priv) 5184 { 5185 struct drm_mode_crtc_lut *crtc_lut = data; 5186 struct drm_crtc *crtc; 5187 void *r_base, *g_base, *b_base; 5188 int size; 5189 int ret = 0; 5190 5191 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5192 return -EINVAL; 5193 5194 drm_modeset_lock_all(dev); 5195 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5196 if (!crtc) { 5197 ret = -ENOENT; 5198 goto out; 5199 } 5200 5201 /* memcpy into gamma store */ 5202 if (crtc_lut->gamma_size != crtc->gamma_size) { 5203 ret = -EINVAL; 5204 goto out; 5205 } 5206 5207 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5208 r_base = crtc->gamma_store; 5209 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 5210 ret = -EFAULT; 5211 goto out; 5212 } 5213 5214 g_base = r_base + size; 5215 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 5216 ret = -EFAULT; 5217 goto out; 5218 } 5219 5220 b_base = g_base + size; 5221 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 5222 ret = -EFAULT; 5223 goto out; 5224 } 5225 out: 5226 drm_modeset_unlock_all(dev); 5227 return ret; 5228 } 5229 5230 /** 5231 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 5232 * @dev: DRM device 5233 * @data: ioctl data 5234 * @file_priv: DRM file info 5235 * 5236 * This schedules an asynchronous update on a given CRTC, called page flip. 5237 * Optionally a drm event is generated to signal the completion of the event. 5238 * Generic drivers cannot assume that a pageflip with changed framebuffer 5239 * properties (including driver specific metadata like tiling layout) will work, 5240 * but some drivers support e.g. pixel format changes through the pageflip 5241 * ioctl. 5242 * 5243 * Called by the user via ioctl. 5244 * 5245 * Returns: 5246 * Zero on success, negative errno on failure. 5247 */ 5248 int drm_mode_page_flip_ioctl(struct drm_device *dev, 5249 void *data, struct drm_file *file_priv) 5250 { 5251 struct drm_mode_crtc_page_flip *page_flip = data; 5252 struct drm_crtc *crtc; 5253 struct drm_framebuffer *fb = NULL; 5254 struct drm_pending_vblank_event *e = NULL; 5255 unsigned long flags; 5256 int ret = -EINVAL; 5257 5258 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5259 return -EINVAL; 5260 5261 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 5262 page_flip->reserved != 0) 5263 return -EINVAL; 5264 5265 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 5266 return -EINVAL; 5267 5268 crtc = drm_crtc_find(dev, page_flip->crtc_id); 5269 if (!crtc) 5270 return -ENOENT; 5271 5272 drm_modeset_lock_crtc(crtc, crtc->primary); 5273 if (crtc->primary->fb == NULL) { 5274 /* The framebuffer is currently unbound, presumably 5275 * due to a hotplug event, that userspace has not 5276 * yet discovered. 5277 */ 5278 ret = -EBUSY; 5279 goto out; 5280 } 5281 5282 if (crtc->funcs->page_flip == NULL) 5283 goto out; 5284 5285 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 5286 if (!fb) { 5287 ret = -ENOENT; 5288 goto out; 5289 } 5290 5291 if (crtc->state) { 5292 const struct drm_plane_state *state = crtc->primary->state; 5293 5294 ret = check_src_coords(state->src_x, state->src_y, 5295 state->src_w, state->src_h, fb); 5296 } else { 5297 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 5298 } 5299 if (ret) 5300 goto out; 5301 5302 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 5303 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 5304 ret = -EINVAL; 5305 goto out; 5306 } 5307 5308 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5309 ret = -ENOMEM; 5310 spin_lock_irqsave(&dev->event_lock, flags); 5311 if (file_priv->event_space < sizeof(e->event)) { 5312 spin_unlock_irqrestore(&dev->event_lock, flags); 5313 goto out; 5314 } 5315 file_priv->event_space -= sizeof(e->event); 5316 spin_unlock_irqrestore(&dev->event_lock, flags); 5317 5318 e = kzalloc(sizeof(*e), GFP_KERNEL); 5319 if (e == NULL) { 5320 spin_lock_irqsave(&dev->event_lock, flags); 5321 file_priv->event_space += sizeof(e->event); 5322 spin_unlock_irqrestore(&dev->event_lock, flags); 5323 goto out; 5324 } 5325 5326 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 5327 e->event.base.length = sizeof(e->event); 5328 e->event.user_data = page_flip->user_data; 5329 e->base.event = &e->event.base; 5330 e->base.file_priv = file_priv; 5331 e->base.destroy = 5332 (void (*) (struct drm_pending_event *)) kfree; 5333 } 5334 5335 crtc->primary->old_fb = crtc->primary->fb; 5336 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 5337 if (ret) { 5338 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5339 spin_lock_irqsave(&dev->event_lock, flags); 5340 file_priv->event_space += sizeof(e->event); 5341 spin_unlock_irqrestore(&dev->event_lock, flags); 5342 kfree(e); 5343 } 5344 /* Keep the old fb, don't unref it. */ 5345 crtc->primary->old_fb = NULL; 5346 } else { 5347 crtc->primary->fb = fb; 5348 /* Unref only the old framebuffer. */ 5349 fb = NULL; 5350 } 5351 5352 out: 5353 if (fb) 5354 drm_framebuffer_unreference(fb); 5355 if (crtc->primary->old_fb) 5356 drm_framebuffer_unreference(crtc->primary->old_fb); 5357 crtc->primary->old_fb = NULL; 5358 drm_modeset_unlock_crtc(crtc); 5359 5360 return ret; 5361 } 5362 5363 /** 5364 * drm_mode_config_reset - call ->reset callbacks 5365 * @dev: drm device 5366 * 5367 * This functions calls all the crtc's, encoder's and connector's ->reset 5368 * callback. Drivers can use this in e.g. their driver load or resume code to 5369 * reset hardware and software state. 5370 */ 5371 void drm_mode_config_reset(struct drm_device *dev) 5372 { 5373 struct drm_crtc *crtc; 5374 struct drm_plane *plane; 5375 struct drm_encoder *encoder; 5376 struct drm_connector *connector; 5377 5378 drm_for_each_plane(plane, dev) 5379 if (plane->funcs->reset) 5380 plane->funcs->reset(plane); 5381 5382 drm_for_each_crtc(crtc, dev) 5383 if (crtc->funcs->reset) 5384 crtc->funcs->reset(crtc); 5385 5386 drm_for_each_encoder(encoder, dev) 5387 if (encoder->funcs->reset) 5388 encoder->funcs->reset(encoder); 5389 5390 mutex_lock(&dev->mode_config.mutex); 5391 drm_for_each_connector(connector, dev) 5392 if (connector->funcs->reset) 5393 connector->funcs->reset(connector); 5394 mutex_unlock(&dev->mode_config.mutex); 5395 } 5396 EXPORT_SYMBOL(drm_mode_config_reset); 5397 5398 /** 5399 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 5400 * @dev: DRM device 5401 * @data: ioctl data 5402 * @file_priv: DRM file info 5403 * 5404 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 5405 * TTM or something else entirely) and returns the resulting buffer handle. This 5406 * handle can then be wrapped up into a framebuffer modeset object. 5407 * 5408 * Note that userspace is not allowed to use such objects for render 5409 * acceleration - drivers must create their own private ioctls for such a use 5410 * case. 5411 * 5412 * Called by the user via ioctl. 5413 * 5414 * Returns: 5415 * Zero on success, negative errno on failure. 5416 */ 5417 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 5418 void *data, struct drm_file *file_priv) 5419 { 5420 struct drm_mode_create_dumb *args = data; 5421 u32 cpp, stride, size; 5422 5423 if (!dev->driver->dumb_create) 5424 return -ENOSYS; 5425 if (!args->width || !args->height || !args->bpp) 5426 return -EINVAL; 5427 5428 /* overflow checks for 32bit size calculations */ 5429 /* NOTE: DIV_ROUND_UP() can overflow */ 5430 cpp = DIV_ROUND_UP(args->bpp, 8); 5431 if (!cpp || cpp > 0xffffffffU / args->width) 5432 return -EINVAL; 5433 stride = cpp * args->width; 5434 if (args->height > 0xffffffffU / stride) 5435 return -EINVAL; 5436 5437 /* test for wrap-around */ 5438 size = args->height * stride; 5439 if (PAGE_ALIGN(size) == 0) 5440 return -EINVAL; 5441 5442 /* 5443 * handle, pitch and size are output parameters. Zero them out to 5444 * prevent drivers from accidentally using uninitialized data. Since 5445 * not all existing userspace is clearing these fields properly we 5446 * cannot reject IOCTL with garbage in them. 5447 */ 5448 args->handle = 0; 5449 args->pitch = 0; 5450 args->size = 0; 5451 5452 return dev->driver->dumb_create(file_priv, dev, args); 5453 } 5454 5455 /** 5456 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 5457 * @dev: DRM device 5458 * @data: ioctl data 5459 * @file_priv: DRM file info 5460 * 5461 * Allocate an offset in the drm device node's address space to be able to 5462 * memory map a dumb buffer. 5463 * 5464 * Called by the user via ioctl. 5465 * 5466 * Returns: 5467 * Zero on success, negative errno on failure. 5468 */ 5469 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 5470 void *data, struct drm_file *file_priv) 5471 { 5472 struct drm_mode_map_dumb *args = data; 5473 5474 /* call driver ioctl to get mmap offset */ 5475 if (!dev->driver->dumb_map_offset) 5476 return -ENOSYS; 5477 5478 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 5479 } 5480 5481 /** 5482 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 5483 * @dev: DRM device 5484 * @data: ioctl data 5485 * @file_priv: DRM file info 5486 * 5487 * This destroys the userspace handle for the given dumb backing storage buffer. 5488 * Since buffer objects must be reference counted in the kernel a buffer object 5489 * won't be immediately freed if a framebuffer modeset object still uses it. 5490 * 5491 * Called by the user via ioctl. 5492 * 5493 * Returns: 5494 * Zero on success, negative errno on failure. 5495 */ 5496 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 5497 void *data, struct drm_file *file_priv) 5498 { 5499 struct drm_mode_destroy_dumb *args = data; 5500 5501 if (!dev->driver->dumb_destroy) 5502 return -ENOSYS; 5503 5504 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 5505 } 5506 5507 /** 5508 * drm_fb_get_bpp_depth - get the bpp/depth values for format 5509 * @format: pixel format (DRM_FORMAT_*) 5510 * @depth: storage for the depth value 5511 * @bpp: storage for the bpp value 5512 * 5513 * This only supports RGB formats here for compat with code that doesn't use 5514 * pixel formats directly yet. 5515 */ 5516 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 5517 int *bpp) 5518 { 5519 switch (format) { 5520 case DRM_FORMAT_C8: 5521 case DRM_FORMAT_RGB332: 5522 case DRM_FORMAT_BGR233: 5523 *depth = 8; 5524 *bpp = 8; 5525 break; 5526 case DRM_FORMAT_XRGB1555: 5527 case DRM_FORMAT_XBGR1555: 5528 case DRM_FORMAT_RGBX5551: 5529 case DRM_FORMAT_BGRX5551: 5530 case DRM_FORMAT_ARGB1555: 5531 case DRM_FORMAT_ABGR1555: 5532 case DRM_FORMAT_RGBA5551: 5533 case DRM_FORMAT_BGRA5551: 5534 *depth = 15; 5535 *bpp = 16; 5536 break; 5537 case DRM_FORMAT_RGB565: 5538 case DRM_FORMAT_BGR565: 5539 *depth = 16; 5540 *bpp = 16; 5541 break; 5542 case DRM_FORMAT_RGB888: 5543 case DRM_FORMAT_BGR888: 5544 *depth = 24; 5545 *bpp = 24; 5546 break; 5547 case DRM_FORMAT_XRGB8888: 5548 case DRM_FORMAT_XBGR8888: 5549 case DRM_FORMAT_RGBX8888: 5550 case DRM_FORMAT_BGRX8888: 5551 *depth = 24; 5552 *bpp = 32; 5553 break; 5554 case DRM_FORMAT_XRGB2101010: 5555 case DRM_FORMAT_XBGR2101010: 5556 case DRM_FORMAT_RGBX1010102: 5557 case DRM_FORMAT_BGRX1010102: 5558 case DRM_FORMAT_ARGB2101010: 5559 case DRM_FORMAT_ABGR2101010: 5560 case DRM_FORMAT_RGBA1010102: 5561 case DRM_FORMAT_BGRA1010102: 5562 *depth = 30; 5563 *bpp = 32; 5564 break; 5565 case DRM_FORMAT_ARGB8888: 5566 case DRM_FORMAT_ABGR8888: 5567 case DRM_FORMAT_RGBA8888: 5568 case DRM_FORMAT_BGRA8888: 5569 *depth = 32; 5570 *bpp = 32; 5571 break; 5572 default: 5573 DRM_DEBUG_KMS("unsupported pixel format %s\n", 5574 drm_get_format_name(format)); 5575 *depth = 0; 5576 *bpp = 0; 5577 break; 5578 } 5579 } 5580 EXPORT_SYMBOL(drm_fb_get_bpp_depth); 5581 5582 /** 5583 * drm_format_num_planes - get the number of planes for format 5584 * @format: pixel format (DRM_FORMAT_*) 5585 * 5586 * Returns: 5587 * The number of planes used by the specified pixel format. 5588 */ 5589 int drm_format_num_planes(uint32_t format) 5590 { 5591 switch (format) { 5592 case DRM_FORMAT_YUV410: 5593 case DRM_FORMAT_YVU410: 5594 case DRM_FORMAT_YUV411: 5595 case DRM_FORMAT_YVU411: 5596 case DRM_FORMAT_YUV420: 5597 case DRM_FORMAT_YVU420: 5598 case DRM_FORMAT_YUV422: 5599 case DRM_FORMAT_YVU422: 5600 case DRM_FORMAT_YUV444: 5601 case DRM_FORMAT_YVU444: 5602 return 3; 5603 case DRM_FORMAT_NV12: 5604 case DRM_FORMAT_NV21: 5605 case DRM_FORMAT_NV16: 5606 case DRM_FORMAT_NV61: 5607 case DRM_FORMAT_NV24: 5608 case DRM_FORMAT_NV42: 5609 return 2; 5610 default: 5611 return 1; 5612 } 5613 } 5614 EXPORT_SYMBOL(drm_format_num_planes); 5615 5616 /** 5617 * drm_format_plane_cpp - determine the bytes per pixel value 5618 * @format: pixel format (DRM_FORMAT_*) 5619 * @plane: plane index 5620 * 5621 * Returns: 5622 * The bytes per pixel value for the specified plane. 5623 */ 5624 int drm_format_plane_cpp(uint32_t format, int plane) 5625 { 5626 unsigned int depth; 5627 int bpp; 5628 5629 if (plane >= drm_format_num_planes(format)) 5630 return 0; 5631 5632 switch (format) { 5633 case DRM_FORMAT_YUYV: 5634 case DRM_FORMAT_YVYU: 5635 case DRM_FORMAT_UYVY: 5636 case DRM_FORMAT_VYUY: 5637 return 2; 5638 case DRM_FORMAT_NV12: 5639 case DRM_FORMAT_NV21: 5640 case DRM_FORMAT_NV16: 5641 case DRM_FORMAT_NV61: 5642 case DRM_FORMAT_NV24: 5643 case DRM_FORMAT_NV42: 5644 return plane ? 2 : 1; 5645 case DRM_FORMAT_YUV410: 5646 case DRM_FORMAT_YVU410: 5647 case DRM_FORMAT_YUV411: 5648 case DRM_FORMAT_YVU411: 5649 case DRM_FORMAT_YUV420: 5650 case DRM_FORMAT_YVU420: 5651 case DRM_FORMAT_YUV422: 5652 case DRM_FORMAT_YVU422: 5653 case DRM_FORMAT_YUV444: 5654 case DRM_FORMAT_YVU444: 5655 return 1; 5656 default: 5657 drm_fb_get_bpp_depth(format, &depth, &bpp); 5658 return bpp >> 3; 5659 } 5660 } 5661 EXPORT_SYMBOL(drm_format_plane_cpp); 5662 5663 /** 5664 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 5665 * @format: pixel format (DRM_FORMAT_*) 5666 * 5667 * Returns: 5668 * The horizontal chroma subsampling factor for the 5669 * specified pixel format. 5670 */ 5671 int drm_format_horz_chroma_subsampling(uint32_t format) 5672 { 5673 switch (format) { 5674 case DRM_FORMAT_YUV411: 5675 case DRM_FORMAT_YVU411: 5676 case DRM_FORMAT_YUV410: 5677 case DRM_FORMAT_YVU410: 5678 return 4; 5679 case DRM_FORMAT_YUYV: 5680 case DRM_FORMAT_YVYU: 5681 case DRM_FORMAT_UYVY: 5682 case DRM_FORMAT_VYUY: 5683 case DRM_FORMAT_NV12: 5684 case DRM_FORMAT_NV21: 5685 case DRM_FORMAT_NV16: 5686 case DRM_FORMAT_NV61: 5687 case DRM_FORMAT_YUV422: 5688 case DRM_FORMAT_YVU422: 5689 case DRM_FORMAT_YUV420: 5690 case DRM_FORMAT_YVU420: 5691 return 2; 5692 default: 5693 return 1; 5694 } 5695 } 5696 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5697 5698 /** 5699 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5700 * @format: pixel format (DRM_FORMAT_*) 5701 * 5702 * Returns: 5703 * The vertical chroma subsampling factor for the 5704 * specified pixel format. 5705 */ 5706 int drm_format_vert_chroma_subsampling(uint32_t format) 5707 { 5708 switch (format) { 5709 case DRM_FORMAT_YUV410: 5710 case DRM_FORMAT_YVU410: 5711 return 4; 5712 case DRM_FORMAT_YUV420: 5713 case DRM_FORMAT_YVU420: 5714 case DRM_FORMAT_NV12: 5715 case DRM_FORMAT_NV21: 5716 return 2; 5717 default: 5718 return 1; 5719 } 5720 } 5721 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5722 5723 /** 5724 * drm_rotation_simplify() - Try to simplify the rotation 5725 * @rotation: Rotation to be simplified 5726 * @supported_rotations: Supported rotations 5727 * 5728 * Attempt to simplify the rotation to a form that is supported. 5729 * Eg. if the hardware supports everything except DRM_REFLECT_X 5730 * one could call this function like this: 5731 * 5732 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5733 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5734 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5735 * 5736 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5737 * transforms the hardware supports, this function may not 5738 * be able to produce a supported transform, so the caller should 5739 * check the result afterwards. 5740 */ 5741 unsigned int drm_rotation_simplify(unsigned int rotation, 5742 unsigned int supported_rotations) 5743 { 5744 if (rotation & ~supported_rotations) { 5745 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5746 rotation = (rotation & DRM_REFLECT_MASK) | 5747 BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4); 5748 } 5749 5750 return rotation; 5751 } 5752 EXPORT_SYMBOL(drm_rotation_simplify); 5753 5754 /** 5755 * drm_mode_config_init - initialize DRM mode_configuration structure 5756 * @dev: DRM device 5757 * 5758 * Initialize @dev's mode_config structure, used for tracking the graphics 5759 * configuration of @dev. 5760 * 5761 * Since this initializes the modeset locks, no locking is possible. Which is no 5762 * problem, since this should happen single threaded at init time. It is the 5763 * driver's problem to ensure this guarantee. 5764 * 5765 */ 5766 void drm_mode_config_init(struct drm_device *dev) 5767 { 5768 mutex_init(&dev->mode_config.mutex); 5769 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5770 mutex_init(&dev->mode_config.idr_mutex); 5771 mutex_init(&dev->mode_config.fb_lock); 5772 mutex_init(&dev->mode_config.blob_lock); 5773 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5774 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5775 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5776 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5777 INIT_LIST_HEAD(&dev->mode_config.property_list); 5778 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5779 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5780 idr_init(&dev->mode_config.crtc_idr); 5781 idr_init(&dev->mode_config.tile_idr); 5782 5783 drm_modeset_lock_all(dev); 5784 drm_mode_create_standard_properties(dev); 5785 drm_modeset_unlock_all(dev); 5786 5787 /* Just to be sure */ 5788 dev->mode_config.num_fb = 0; 5789 dev->mode_config.num_connector = 0; 5790 dev->mode_config.num_crtc = 0; 5791 dev->mode_config.num_encoder = 0; 5792 dev->mode_config.num_overlay_plane = 0; 5793 dev->mode_config.num_total_plane = 0; 5794 } 5795 EXPORT_SYMBOL(drm_mode_config_init); 5796 5797 /** 5798 * drm_mode_config_cleanup - free up DRM mode_config info 5799 * @dev: DRM device 5800 * 5801 * Free up all the connectors and CRTCs associated with this DRM device, then 5802 * free up the framebuffers and associated buffer objects. 5803 * 5804 * Note that since this /should/ happen single-threaded at driver/device 5805 * teardown time, no locking is required. It's the driver's job to ensure that 5806 * this guarantee actually holds true. 5807 * 5808 * FIXME: cleanup any dangling user buffer objects too 5809 */ 5810 void drm_mode_config_cleanup(struct drm_device *dev) 5811 { 5812 struct drm_connector *connector, *ot; 5813 struct drm_crtc *crtc, *ct; 5814 struct drm_encoder *encoder, *enct; 5815 struct drm_framebuffer *fb, *fbt; 5816 struct drm_property *property, *pt; 5817 struct drm_property_blob *blob, *bt; 5818 struct drm_plane *plane, *plt; 5819 5820 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5821 head) { 5822 encoder->funcs->destroy(encoder); 5823 } 5824 5825 list_for_each_entry_safe(connector, ot, 5826 &dev->mode_config.connector_list, head) { 5827 connector->funcs->destroy(connector); 5828 } 5829 5830 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5831 head) { 5832 drm_property_destroy(dev, property); 5833 } 5834 5835 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5836 head_global) { 5837 drm_property_unreference_blob(blob); 5838 } 5839 5840 /* 5841 * Single-threaded teardown context, so it's not required to grab the 5842 * fb_lock to protect against concurrent fb_list access. Contrary, it 5843 * would actually deadlock with the drm_framebuffer_cleanup function. 5844 * 5845 * Also, if there are any framebuffers left, that's a driver leak now, 5846 * so politely WARN about this. 5847 */ 5848 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5849 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5850 drm_framebuffer_free(&fb->refcount); 5851 } 5852 5853 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5854 head) { 5855 plane->funcs->destroy(plane); 5856 } 5857 5858 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5859 crtc->funcs->destroy(crtc); 5860 } 5861 5862 idr_destroy(&dev->mode_config.tile_idr); 5863 idr_destroy(&dev->mode_config.crtc_idr); 5864 mutex_destroy(&dev->mode_config.blob_lock); 5865 mutex_destroy(&dev->mode_config.fb_lock); 5866 mutex_destroy(&dev->mode_config.idr_mutex); 5867 mutex_destroy(&dev->mode_config.mutex); 5868 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5869 } 5870 EXPORT_SYMBOL(drm_mode_config_cleanup); 5871 5872 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5873 unsigned int supported_rotations) 5874 { 5875 static const struct drm_prop_enum_list props[] = { 5876 { DRM_ROTATE_0, "rotate-0" }, 5877 { DRM_ROTATE_90, "rotate-90" }, 5878 { DRM_ROTATE_180, "rotate-180" }, 5879 { DRM_ROTATE_270, "rotate-270" }, 5880 { DRM_REFLECT_X, "reflect-x" }, 5881 { DRM_REFLECT_Y, "reflect-y" }, 5882 }; 5883 5884 return drm_property_create_bitmask(dev, 0, "rotation", 5885 props, ARRAY_SIZE(props), 5886 supported_rotations); 5887 } 5888 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5889 5890 /** 5891 * DOC: Tile group 5892 * 5893 * Tile groups are used to represent tiled monitors with a unique 5894 * integer identifier. Tiled monitors using DisplayID v1.3 have 5895 * a unique 8-byte handle, we store this in a tile group, so we 5896 * have a common identifier for all tiles in a monitor group. 5897 */ 5898 static void drm_tile_group_free(struct kref *kref) 5899 { 5900 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5901 struct drm_device *dev = tg->dev; 5902 mutex_lock(&dev->mode_config.idr_mutex); 5903 idr_remove(&dev->mode_config.tile_idr, tg->id); 5904 mutex_unlock(&dev->mode_config.idr_mutex); 5905 kfree(tg); 5906 } 5907 5908 /** 5909 * drm_mode_put_tile_group - drop a reference to a tile group. 5910 * @dev: DRM device 5911 * @tg: tile group to drop reference to. 5912 * 5913 * drop reference to tile group and free if 0. 5914 */ 5915 void drm_mode_put_tile_group(struct drm_device *dev, 5916 struct drm_tile_group *tg) 5917 { 5918 kref_put(&tg->refcount, drm_tile_group_free); 5919 } 5920 5921 /** 5922 * drm_mode_get_tile_group - get a reference to an existing tile group 5923 * @dev: DRM device 5924 * @topology: 8-bytes unique per monitor. 5925 * 5926 * Use the unique bytes to get a reference to an existing tile group. 5927 * 5928 * RETURNS: 5929 * tile group or NULL if not found. 5930 */ 5931 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 5932 char topology[8]) 5933 { 5934 struct drm_tile_group *tg; 5935 int id; 5936 mutex_lock(&dev->mode_config.idr_mutex); 5937 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 5938 if (!memcmp(tg->group_data, topology, 8)) { 5939 if (!kref_get_unless_zero(&tg->refcount)) 5940 tg = NULL; 5941 mutex_unlock(&dev->mode_config.idr_mutex); 5942 return tg; 5943 } 5944 } 5945 mutex_unlock(&dev->mode_config.idr_mutex); 5946 return NULL; 5947 } 5948 EXPORT_SYMBOL(drm_mode_get_tile_group); 5949 5950 /** 5951 * drm_mode_create_tile_group - create a tile group from a displayid description 5952 * @dev: DRM device 5953 * @topology: 8-bytes unique per monitor. 5954 * 5955 * Create a tile group for the unique monitor, and get a unique 5956 * identifier for the tile group. 5957 * 5958 * RETURNS: 5959 * new tile group or error. 5960 */ 5961 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 5962 char topology[8]) 5963 { 5964 struct drm_tile_group *tg; 5965 int ret; 5966 5967 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 5968 if (!tg) 5969 return ERR_PTR(-ENOMEM); 5970 5971 kref_init(&tg->refcount); 5972 memcpy(tg->group_data, topology, 8); 5973 tg->dev = dev; 5974 5975 idr_preload(GFP_KERNEL); 5976 mutex_lock(&dev->mode_config.idr_mutex); 5977 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 5978 if (ret >= 0) { 5979 tg->id = ret; 5980 } else { 5981 kfree(tg); 5982 tg = ERR_PTR(ret); 5983 } 5984 5985 mutex_unlock(&dev->mode_config.idr_mutex); 5986 idr_preload_end(); 5987 return tg; 5988 } 5989 EXPORT_SYMBOL(drm_mode_create_tile_group); 5990