drm_crtc.c revision 1.16
1 /* $NetBSD: drm_crtc.c,v 1.16 2020/02/14 14:34:57 maya Exp $ */ 2 3 /* 4 * Copyright (c) 2006-2008 Intel Corporation 5 * Copyright (c) 2007 Dave Airlie <airlied (at) linux.ie> 6 * Copyright (c) 2008 Red Hat Inc. 7 * 8 * DRM core CRTC related functions 9 * 10 * Permission to use, copy, modify, distribute, and sell this software and its 11 * documentation for any purpose is hereby granted without fee, provided that 12 * the above copyright notice appear in all copies and that both that copyright 13 * notice and this permission notice appear in supporting documentation, and 14 * that the name of the copyright holders not be used in advertising or 15 * publicity pertaining to distribution of the software without specific, 16 * written prior permission. The copyright holders make no representations 17 * about the suitability of this software for any purpose. It is provided "as 18 * is" without express or implied warranty. 19 * 20 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 21 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 22 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 23 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 24 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 25 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 26 * OF THIS SOFTWARE. 27 * 28 * Authors: 29 * Keith Packard 30 * Eric Anholt <eric (at) anholt.net> 31 * Dave Airlie <airlied (at) linux.ie> 32 * Jesse Barnes <jesse.barnes (at) intel.com> 33 */ 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: drm_crtc.c,v 1.16 2020/02/14 14:34:57 maya 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 char *option = NULL; 829 830 #ifdef __NetBSD__ 831 prop_dictionary_t prop = device_properties(connector->dev->dev); 832 if (!prop_dictionary_get_cstring(prop, connector->name, &option)) 833 return; 834 #else 835 if (fb_get_options(connector->name, &option)) 836 return; 837 #endif 838 839 if (!drm_mode_parse_command_line_for_connector(option, 840 connector, 841 mode)) 842 return; 843 844 if (mode->force) { 845 const char *s; 846 847 switch (mode->force) { 848 case DRM_FORCE_OFF: 849 s = "OFF"; 850 break; 851 case DRM_FORCE_ON_DIGITAL: 852 s = "ON - dig"; 853 break; 854 default: 855 case DRM_FORCE_ON: 856 s = "ON"; 857 break; 858 } 859 860 DRM_INFO("forcing %s connector %s\n", connector->name, s); 861 connector->force = mode->force; 862 } 863 864 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 865 connector->name, 866 mode->xres, mode->yres, 867 mode->refresh_specified ? mode->refresh : 60, 868 mode->rb ? " reduced blanking" : "", 869 mode->margins ? " with margins" : "", 870 mode->interlace ? " interlaced" : ""); 871 } 872 873 /** 874 * drm_connector_init - Init a preallocated connector 875 * @dev: DRM device 876 * @connector: the connector to init 877 * @funcs: callbacks for this connector 878 * @connector_type: user visible type of the connector 879 * 880 * Initialises a preallocated connector. Connectors should be 881 * subclassed as part of driver connector objects. 882 * 883 * Returns: 884 * Zero on success, error code on failure. 885 */ 886 int drm_connector_init(struct drm_device *dev, 887 struct drm_connector *connector, 888 const struct drm_connector_funcs *funcs, 889 int connector_type) 890 { 891 struct drm_mode_config *config = &dev->mode_config; 892 int ret; 893 struct ida *connector_ida = 894 &drm_connector_enum_list[connector_type].ida; 895 896 drm_modeset_lock_all(dev); 897 898 ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false); 899 if (ret) 900 goto out_unlock; 901 902 connector->base.properties = &connector->properties; 903 connector->dev = dev; 904 connector->kdev = dev->dev; 905 connector->funcs = funcs; 906 connector->connector_type = connector_type; 907 connector->connector_type_id = 908 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); 909 if (connector->connector_type_id < 0) { 910 ret = connector->connector_type_id; 911 goto out_put; 912 } 913 connector->name = 914 kasprintf(GFP_KERNEL, "%s-%d", 915 drm_connector_enum_list[connector_type].name, 916 connector->connector_type_id); 917 if (!connector->name) { 918 ret = -ENOMEM; 919 goto out_put; 920 } 921 922 INIT_LIST_HEAD(&connector->probed_modes); 923 INIT_LIST_HEAD(&connector->modes); 924 connector->edid_blob_ptr = NULL; 925 connector->status = connector_status_unknown; 926 927 drm_connector_get_cmdline_mode(connector); 928 929 /* We should add connectors at the end to avoid upsetting the connector 930 * index too much. */ 931 list_add_tail(&connector->head, &config->connector_list); 932 config->num_connector++; 933 934 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 935 drm_object_attach_property(&connector->base, 936 config->edid_property, 937 0); 938 939 drm_object_attach_property(&connector->base, 940 config->dpms_property, 0); 941 942 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 943 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); 944 } 945 946 connector->debugfs_entry = NULL; 947 948 out_put: 949 if (ret) 950 drm_mode_object_put(dev, &connector->base); 951 952 out_unlock: 953 drm_modeset_unlock_all(dev); 954 955 return ret; 956 } 957 EXPORT_SYMBOL(drm_connector_init); 958 959 /** 960 * drm_connector_cleanup - cleans up an initialised connector 961 * @connector: connector to cleanup 962 * 963 * Cleans up the connector but doesn't free the object. 964 */ 965 void drm_connector_cleanup(struct drm_connector *connector) 966 { 967 struct drm_device *dev = connector->dev; 968 struct drm_display_mode *mode, *t; 969 970 if (connector->tile_group) { 971 drm_mode_put_tile_group(dev, connector->tile_group); 972 connector->tile_group = NULL; 973 } 974 975 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 976 drm_mode_remove(connector, mode); 977 978 list_for_each_entry_safe(mode, t, &connector->modes, head) 979 drm_mode_remove(connector, mode); 980 981 ida_remove(&drm_connector_enum_list[connector->connector_type].ida, 982 connector->connector_type_id); 983 984 kfree(connector->display_info.bus_formats); 985 drm_mode_object_put(dev, &connector->base); 986 kfree(connector->name); 987 connector->name = NULL; 988 list_del(&connector->head); 989 dev->mode_config.num_connector--; 990 991 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 992 if (connector->state && connector->funcs->atomic_destroy_state) 993 connector->funcs->atomic_destroy_state(connector, 994 connector->state); 995 996 memset(connector, 0, sizeof(*connector)); 997 } 998 EXPORT_SYMBOL(drm_connector_cleanup); 999 1000 /** 1001 * drm_connector_index - find the index of a registered connector 1002 * @connector: connector to find index for 1003 * 1004 * Given a registered connector, return the index of that connector within a DRM 1005 * device's list of connectors. 1006 */ 1007 unsigned int drm_connector_index(struct drm_connector *connector) 1008 { 1009 unsigned int index = 0; 1010 struct drm_connector *tmp; 1011 struct drm_mode_config *config = &connector->dev->mode_config; 1012 1013 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 1014 1015 drm_for_each_connector(tmp, connector->dev) { 1016 if (tmp == connector) 1017 return index; 1018 1019 index++; 1020 } 1021 1022 BUG(); 1023 } 1024 EXPORT_SYMBOL(drm_connector_index); 1025 1026 /** 1027 * drm_connector_register - register a connector 1028 * @connector: the connector to register 1029 * 1030 * Register userspace interfaces for a connector 1031 * 1032 * Returns: 1033 * Zero on success, error code on failure. 1034 */ 1035 int drm_connector_register(struct drm_connector *connector) 1036 { 1037 #ifndef __NetBSD__ /* XXX sysfs, debugfs */ 1038 int ret; 1039 #endif 1040 1041 drm_mode_object_register(connector->dev, &connector->base); 1042 1043 #ifndef __NetBSD__ /* XXX sysfs, debugfs */ 1044 ret = drm_sysfs_connector_add(connector); 1045 if (ret) 1046 return ret; 1047 1048 ret = drm_debugfs_connector_add(connector); 1049 if (ret) { 1050 drm_sysfs_connector_remove(connector); 1051 return ret; 1052 } 1053 #endif 1054 1055 return 0; 1056 } 1057 EXPORT_SYMBOL(drm_connector_register); 1058 1059 /** 1060 * drm_connector_unregister - unregister a connector 1061 * @connector: the connector to unregister 1062 * 1063 * Unregister userspace interfaces for a connector 1064 */ 1065 void drm_connector_unregister(struct drm_connector *connector) 1066 { 1067 #ifndef __NetBSD__ /* XXX sysfs, debugfs */ 1068 drm_sysfs_connector_remove(connector); 1069 drm_debugfs_connector_remove(connector); 1070 #endif 1071 } 1072 EXPORT_SYMBOL(drm_connector_unregister); 1073 1074 1075 /** 1076 * drm_connector_unplug_all - unregister connector userspace interfaces 1077 * @dev: drm device 1078 * 1079 * This function unregisters all connector userspace interfaces in sysfs. Should 1080 * be call when the device is disconnected, e.g. from an usb driver's 1081 * ->disconnect callback. 1082 */ 1083 void drm_connector_unplug_all(struct drm_device *dev) 1084 { 1085 struct drm_connector *connector; 1086 1087 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */ 1088 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1089 drm_connector_unregister(connector); 1090 1091 } 1092 EXPORT_SYMBOL(drm_connector_unplug_all); 1093 1094 /** 1095 * drm_encoder_init - Init a preallocated encoder 1096 * @dev: drm device 1097 * @encoder: the encoder to init 1098 * @funcs: callbacks for this encoder 1099 * @encoder_type: user visible type of the encoder 1100 * 1101 * Initialises a preallocated encoder. Encoder should be 1102 * subclassed as part of driver encoder objects. 1103 * 1104 * Returns: 1105 * Zero on success, error code on failure. 1106 */ 1107 int drm_encoder_init(struct drm_device *dev, 1108 struct drm_encoder *encoder, 1109 const struct drm_encoder_funcs *funcs, 1110 int encoder_type) 1111 { 1112 int ret; 1113 1114 drm_modeset_lock_all(dev); 1115 1116 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1117 if (ret) 1118 goto out_unlock; 1119 1120 encoder->dev = dev; 1121 encoder->encoder_type = encoder_type; 1122 encoder->funcs = funcs; 1123 encoder->name = kasprintf(GFP_KERNEL, "%s-%d", 1124 drm_encoder_enum_list[encoder_type].name, 1125 encoder->base.id); 1126 if (!encoder->name) { 1127 ret = -ENOMEM; 1128 goto out_put; 1129 } 1130 1131 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1132 dev->mode_config.num_encoder++; 1133 1134 out_put: 1135 if (ret) 1136 drm_mode_object_put(dev, &encoder->base); 1137 1138 out_unlock: 1139 drm_modeset_unlock_all(dev); 1140 1141 return ret; 1142 } 1143 EXPORT_SYMBOL(drm_encoder_init); 1144 1145 /** 1146 * drm_encoder_cleanup - cleans up an initialised encoder 1147 * @encoder: encoder to cleanup 1148 * 1149 * Cleans up the encoder but doesn't free the object. 1150 */ 1151 void drm_encoder_cleanup(struct drm_encoder *encoder) 1152 { 1153 struct drm_device *dev = encoder->dev; 1154 1155 drm_modeset_lock_all(dev); 1156 drm_mode_object_put(dev, &encoder->base); 1157 kfree(encoder->name); 1158 list_del(&encoder->head); 1159 dev->mode_config.num_encoder--; 1160 drm_modeset_unlock_all(dev); 1161 1162 memset(encoder, 0, sizeof(*encoder)); 1163 } 1164 EXPORT_SYMBOL(drm_encoder_cleanup); 1165 1166 /** 1167 * drm_universal_plane_init - Initialize a new universal plane object 1168 * @dev: DRM device 1169 * @plane: plane object to init 1170 * @possible_crtcs: bitmask of possible CRTCs 1171 * @funcs: callbacks for the new plane 1172 * @formats: array of supported formats (%DRM_FORMAT_*) 1173 * @format_count: number of elements in @formats 1174 * @type: type of plane (overlay, primary, cursor) 1175 * 1176 * Initializes a plane object of type @type. 1177 * 1178 * Returns: 1179 * Zero on success, error code on failure. 1180 */ 1181 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1182 unsigned long possible_crtcs, 1183 const struct drm_plane_funcs *funcs, 1184 const uint32_t *formats, unsigned int format_count, 1185 enum drm_plane_type type) 1186 { 1187 struct drm_mode_config *config = &dev->mode_config; 1188 int ret; 1189 1190 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1191 if (ret) 1192 return ret; 1193 1194 drm_modeset_lock_init(&plane->mutex); 1195 1196 plane->base.properties = &plane->properties; 1197 plane->dev = dev; 1198 plane->funcs = funcs; 1199 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t), 1200 GFP_KERNEL); 1201 if (!plane->format_types) { 1202 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1203 drm_mode_object_put(dev, &plane->base); 1204 return -ENOMEM; 1205 } 1206 1207 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1208 plane->format_count = format_count; 1209 plane->possible_crtcs = possible_crtcs; 1210 plane->type = type; 1211 1212 list_add_tail(&plane->head, &config->plane_list); 1213 config->num_total_plane++; 1214 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1215 config->num_overlay_plane++; 1216 1217 drm_object_attach_property(&plane->base, 1218 config->plane_type_property, 1219 plane->type); 1220 1221 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 1222 drm_object_attach_property(&plane->base, config->prop_fb_id, 0); 1223 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); 1224 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); 1225 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); 1226 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); 1227 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); 1228 drm_object_attach_property(&plane->base, config->prop_src_x, 0); 1229 drm_object_attach_property(&plane->base, config->prop_src_y, 0); 1230 drm_object_attach_property(&plane->base, config->prop_src_w, 0); 1231 drm_object_attach_property(&plane->base, config->prop_src_h, 0); 1232 } 1233 1234 return 0; 1235 } 1236 EXPORT_SYMBOL(drm_universal_plane_init); 1237 1238 /** 1239 * drm_plane_init - Initialize a legacy plane 1240 * @dev: DRM device 1241 * @plane: plane object to init 1242 * @possible_crtcs: bitmask of possible CRTCs 1243 * @funcs: callbacks for the new plane 1244 * @formats: array of supported formats (%DRM_FORMAT_*) 1245 * @format_count: number of elements in @formats 1246 * @is_primary: plane type (primary vs overlay) 1247 * 1248 * Legacy API to initialize a DRM plane. 1249 * 1250 * New drivers should call drm_universal_plane_init() instead. 1251 * 1252 * Returns: 1253 * Zero on success, error code on failure. 1254 */ 1255 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1256 unsigned long possible_crtcs, 1257 const struct drm_plane_funcs *funcs, 1258 const uint32_t *formats, unsigned int format_count, 1259 bool is_primary) 1260 { 1261 enum drm_plane_type type; 1262 1263 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1264 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1265 formats, format_count, type); 1266 } 1267 EXPORT_SYMBOL(drm_plane_init); 1268 1269 /** 1270 * drm_plane_cleanup - Clean up the core plane usage 1271 * @plane: plane to cleanup 1272 * 1273 * This function cleans up @plane and removes it from the DRM mode setting 1274 * core. Note that the function does *not* free the plane structure itself, 1275 * this is the responsibility of the caller. 1276 */ 1277 void drm_plane_cleanup(struct drm_plane *plane) 1278 { 1279 struct drm_device *dev = plane->dev; 1280 1281 drm_modeset_lock_all(dev); 1282 kfree(plane->format_types); 1283 drm_mode_object_put(dev, &plane->base); 1284 1285 BUG_ON(list_empty(&plane->head)); 1286 1287 list_del(&plane->head); 1288 dev->mode_config.num_total_plane--; 1289 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1290 dev->mode_config.num_overlay_plane--; 1291 drm_modeset_unlock_all(dev); 1292 1293 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1294 if (plane->state && plane->funcs->atomic_destroy_state) 1295 plane->funcs->atomic_destroy_state(plane, plane->state); 1296 drm_modeset_lock_fini(&plane->mutex); 1297 1298 memset(plane, 0, sizeof(*plane)); 1299 } 1300 EXPORT_SYMBOL(drm_plane_cleanup); 1301 1302 /** 1303 * drm_plane_index - find the index of a registered plane 1304 * @plane: plane to find index for 1305 * 1306 * Given a registered plane, return the index of that CRTC within a DRM 1307 * device's list of planes. 1308 */ 1309 unsigned int drm_plane_index(struct drm_plane *plane) 1310 { 1311 unsigned int index = 0; 1312 struct drm_plane *tmp; 1313 1314 drm_for_each_plane(tmp, plane->dev) { 1315 if (tmp == plane) 1316 return index; 1317 1318 index++; 1319 } 1320 1321 BUG(); 1322 } 1323 EXPORT_SYMBOL(drm_plane_index); 1324 1325 /** 1326 * drm_plane_from_index - find the registered plane at an index 1327 * @dev: DRM device 1328 * @idx: index of registered plane to find for 1329 * 1330 * Given a plane index, return the registered plane from DRM device's 1331 * list of planes with matching index. 1332 */ 1333 struct drm_plane * 1334 drm_plane_from_index(struct drm_device *dev, int idx) 1335 { 1336 struct drm_plane *plane; 1337 unsigned int i = 0; 1338 1339 drm_for_each_plane(plane, dev) { 1340 if (i == idx) 1341 return plane; 1342 i++; 1343 } 1344 return NULL; 1345 } 1346 EXPORT_SYMBOL(drm_plane_from_index); 1347 1348 /** 1349 * drm_plane_force_disable - Forcibly disable a plane 1350 * @plane: plane to disable 1351 * 1352 * Forces the plane to be disabled. 1353 * 1354 * Used when the plane's current framebuffer is destroyed, 1355 * and when restoring fbdev mode. 1356 */ 1357 void drm_plane_force_disable(struct drm_plane *plane) 1358 { 1359 int ret; 1360 1361 if (!plane->fb) 1362 return; 1363 1364 plane->old_fb = plane->fb; 1365 ret = plane->funcs->disable_plane(plane); 1366 if (ret) { 1367 DRM_ERROR("failed to disable plane with busy fb\n"); 1368 plane->old_fb = NULL; 1369 return; 1370 } 1371 /* disconnect the plane from the fb and crtc: */ 1372 drm_framebuffer_unreference(plane->old_fb); 1373 plane->old_fb = NULL; 1374 plane->fb = NULL; 1375 plane->crtc = NULL; 1376 } 1377 EXPORT_SYMBOL(drm_plane_force_disable); 1378 1379 static int drm_mode_create_standard_properties(struct drm_device *dev) 1380 { 1381 struct drm_property *prop; 1382 1383 /* 1384 * Standard properties (apply to all connectors) 1385 */ 1386 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1387 DRM_MODE_PROP_IMMUTABLE, 1388 "EDID", 0); 1389 if (!prop) 1390 return -ENOMEM; 1391 dev->mode_config.edid_property = prop; 1392 1393 prop = drm_property_create_enum(dev, 0, 1394 "DPMS", drm_dpms_enum_list, 1395 ARRAY_SIZE(drm_dpms_enum_list)); 1396 if (!prop) 1397 return -ENOMEM; 1398 dev->mode_config.dpms_property = prop; 1399 1400 prop = drm_property_create(dev, 1401 DRM_MODE_PROP_BLOB | 1402 DRM_MODE_PROP_IMMUTABLE, 1403 "PATH", 0); 1404 if (!prop) 1405 return -ENOMEM; 1406 dev->mode_config.path_property = prop; 1407 1408 prop = drm_property_create(dev, 1409 DRM_MODE_PROP_BLOB | 1410 DRM_MODE_PROP_IMMUTABLE, 1411 "TILE", 0); 1412 if (!prop) 1413 return -ENOMEM; 1414 dev->mode_config.tile_property = prop; 1415 1416 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1417 "type", drm_plane_type_enum_list, 1418 ARRAY_SIZE(drm_plane_type_enum_list)); 1419 if (!prop) 1420 return -ENOMEM; 1421 dev->mode_config.plane_type_property = prop; 1422 1423 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1424 "SRC_X", 0, UINT_MAX); 1425 if (!prop) 1426 return -ENOMEM; 1427 dev->mode_config.prop_src_x = prop; 1428 1429 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1430 "SRC_Y", 0, UINT_MAX); 1431 if (!prop) 1432 return -ENOMEM; 1433 dev->mode_config.prop_src_y = prop; 1434 1435 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1436 "SRC_W", 0, UINT_MAX); 1437 if (!prop) 1438 return -ENOMEM; 1439 dev->mode_config.prop_src_w = prop; 1440 1441 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1442 "SRC_H", 0, UINT_MAX); 1443 if (!prop) 1444 return -ENOMEM; 1445 dev->mode_config.prop_src_h = prop; 1446 1447 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1448 "CRTC_X", INT_MIN, INT_MAX); 1449 if (!prop) 1450 return -ENOMEM; 1451 dev->mode_config.prop_crtc_x = prop; 1452 1453 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1454 "CRTC_Y", INT_MIN, INT_MAX); 1455 if (!prop) 1456 return -ENOMEM; 1457 dev->mode_config.prop_crtc_y = prop; 1458 1459 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1460 "CRTC_W", 0, INT_MAX); 1461 if (!prop) 1462 return -ENOMEM; 1463 dev->mode_config.prop_crtc_w = prop; 1464 1465 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1466 "CRTC_H", 0, INT_MAX); 1467 if (!prop) 1468 return -ENOMEM; 1469 dev->mode_config.prop_crtc_h = prop; 1470 1471 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1472 "FB_ID", DRM_MODE_OBJECT_FB); 1473 if (!prop) 1474 return -ENOMEM; 1475 dev->mode_config.prop_fb_id = prop; 1476 1477 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1478 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 1479 if (!prop) 1480 return -ENOMEM; 1481 dev->mode_config.prop_crtc_id = prop; 1482 1483 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 1484 "ACTIVE"); 1485 if (!prop) 1486 return -ENOMEM; 1487 dev->mode_config.prop_active = prop; 1488 1489 prop = drm_property_create(dev, 1490 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 1491 "MODE_ID", 0); 1492 if (!prop) 1493 return -ENOMEM; 1494 dev->mode_config.prop_mode_id = prop; 1495 1496 return 0; 1497 } 1498 1499 /** 1500 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1501 * @dev: DRM device 1502 * 1503 * Called by a driver the first time a DVI-I connector is made. 1504 */ 1505 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1506 { 1507 struct drm_property *dvi_i_selector; 1508 struct drm_property *dvi_i_subconnector; 1509 1510 if (dev->mode_config.dvi_i_select_subconnector_property) 1511 return 0; 1512 1513 dvi_i_selector = 1514 drm_property_create_enum(dev, 0, 1515 "select subconnector", 1516 drm_dvi_i_select_enum_list, 1517 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1518 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1519 1520 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1521 "subconnector", 1522 drm_dvi_i_subconnector_enum_list, 1523 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1524 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1525 1526 return 0; 1527 } 1528 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1529 1530 /** 1531 * drm_create_tv_properties - create TV specific connector properties 1532 * @dev: DRM device 1533 * @num_modes: number of different TV formats (modes) supported 1534 * @modes: array of pointers to strings containing name of each format 1535 * 1536 * Called by a driver's TV initialization routine, this function creates 1537 * the TV specific connector properties for a given device. Caller is 1538 * responsible for allocating a list of format names and passing them to 1539 * this routine. 1540 */ 1541 int drm_mode_create_tv_properties(struct drm_device *dev, 1542 unsigned int num_modes, 1543 const char * const modes[]) 1544 { 1545 struct drm_property *tv_selector; 1546 struct drm_property *tv_subconnector; 1547 unsigned int i; 1548 1549 if (dev->mode_config.tv_select_subconnector_property) 1550 return 0; 1551 1552 /* 1553 * Basic connector properties 1554 */ 1555 tv_selector = drm_property_create_enum(dev, 0, 1556 "select subconnector", 1557 drm_tv_select_enum_list, 1558 ARRAY_SIZE(drm_tv_select_enum_list)); 1559 if (!tv_selector) 1560 goto nomem; 1561 1562 dev->mode_config.tv_select_subconnector_property = tv_selector; 1563 1564 tv_subconnector = 1565 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1566 "subconnector", 1567 drm_tv_subconnector_enum_list, 1568 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1569 if (!tv_subconnector) 1570 goto nomem; 1571 dev->mode_config.tv_subconnector_property = tv_subconnector; 1572 1573 /* 1574 * Other, TV specific properties: margins & TV modes. 1575 */ 1576 dev->mode_config.tv_left_margin_property = 1577 drm_property_create_range(dev, 0, "left margin", 0, 100); 1578 if (!dev->mode_config.tv_left_margin_property) 1579 goto nomem; 1580 1581 dev->mode_config.tv_right_margin_property = 1582 drm_property_create_range(dev, 0, "right margin", 0, 100); 1583 if (!dev->mode_config.tv_right_margin_property) 1584 goto nomem; 1585 1586 dev->mode_config.tv_top_margin_property = 1587 drm_property_create_range(dev, 0, "top margin", 0, 100); 1588 if (!dev->mode_config.tv_top_margin_property) 1589 goto nomem; 1590 1591 dev->mode_config.tv_bottom_margin_property = 1592 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1593 if (!dev->mode_config.tv_bottom_margin_property) 1594 goto nomem; 1595 1596 dev->mode_config.tv_mode_property = 1597 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1598 "mode", num_modes); 1599 if (!dev->mode_config.tv_mode_property) 1600 goto nomem; 1601 1602 for (i = 0; i < num_modes; i++) 1603 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1604 i, modes[i]); 1605 1606 dev->mode_config.tv_brightness_property = 1607 drm_property_create_range(dev, 0, "brightness", 0, 100); 1608 if (!dev->mode_config.tv_brightness_property) 1609 goto nomem; 1610 1611 dev->mode_config.tv_contrast_property = 1612 drm_property_create_range(dev, 0, "contrast", 0, 100); 1613 if (!dev->mode_config.tv_contrast_property) 1614 goto nomem; 1615 1616 dev->mode_config.tv_flicker_reduction_property = 1617 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1618 if (!dev->mode_config.tv_flicker_reduction_property) 1619 goto nomem; 1620 1621 dev->mode_config.tv_overscan_property = 1622 drm_property_create_range(dev, 0, "overscan", 0, 100); 1623 if (!dev->mode_config.tv_overscan_property) 1624 goto nomem; 1625 1626 dev->mode_config.tv_saturation_property = 1627 drm_property_create_range(dev, 0, "saturation", 0, 100); 1628 if (!dev->mode_config.tv_saturation_property) 1629 goto nomem; 1630 1631 dev->mode_config.tv_hue_property = 1632 drm_property_create_range(dev, 0, "hue", 0, 100); 1633 if (!dev->mode_config.tv_hue_property) 1634 goto nomem; 1635 1636 return 0; 1637 nomem: 1638 return -ENOMEM; 1639 } 1640 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1641 1642 /** 1643 * drm_mode_create_scaling_mode_property - create scaling mode property 1644 * @dev: DRM device 1645 * 1646 * Called by a driver the first time it's needed, must be attached to desired 1647 * connectors. 1648 */ 1649 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1650 { 1651 struct drm_property *scaling_mode; 1652 1653 if (dev->mode_config.scaling_mode_property) 1654 return 0; 1655 1656 scaling_mode = 1657 drm_property_create_enum(dev, 0, "scaling mode", 1658 drm_scaling_mode_enum_list, 1659 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1660 1661 dev->mode_config.scaling_mode_property = scaling_mode; 1662 1663 return 0; 1664 } 1665 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1666 1667 /** 1668 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1669 * @dev: DRM device 1670 * 1671 * Called by a driver the first time it's needed, must be attached to desired 1672 * connectors. 1673 * 1674 * Returns: 1675 * Zero on success, negative errno on failure. 1676 */ 1677 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1678 { 1679 if (dev->mode_config.aspect_ratio_property) 1680 return 0; 1681 1682 dev->mode_config.aspect_ratio_property = 1683 drm_property_create_enum(dev, 0, "aspect ratio", 1684 drm_aspect_ratio_enum_list, 1685 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1686 1687 if (dev->mode_config.aspect_ratio_property == NULL) 1688 return -ENOMEM; 1689 1690 return 0; 1691 } 1692 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1693 1694 /** 1695 * drm_mode_create_dirty_property - create dirty property 1696 * @dev: DRM device 1697 * 1698 * Called by a driver the first time it's needed, must be attached to desired 1699 * connectors. 1700 */ 1701 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1702 { 1703 struct drm_property *dirty_info; 1704 1705 if (dev->mode_config.dirty_info_property) 1706 return 0; 1707 1708 dirty_info = 1709 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1710 "dirty", 1711 drm_dirty_info_enum_list, 1712 ARRAY_SIZE(drm_dirty_info_enum_list)); 1713 dev->mode_config.dirty_info_property = dirty_info; 1714 1715 return 0; 1716 } 1717 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1718 1719 /** 1720 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1721 * @dev: DRM device 1722 * 1723 * Create the the suggested x/y offset property for connectors. 1724 */ 1725 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1726 { 1727 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1728 return 0; 1729 1730 dev->mode_config.suggested_x_property = 1731 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1732 1733 dev->mode_config.suggested_y_property = 1734 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1735 1736 if (dev->mode_config.suggested_x_property == NULL || 1737 dev->mode_config.suggested_y_property == NULL) 1738 return -ENOMEM; 1739 return 0; 1740 } 1741 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1742 1743 /** 1744 * drm_mode_getresources - get graphics configuration 1745 * @dev: drm device for the ioctl 1746 * @data: data pointer for the ioctl 1747 * @file_priv: drm file for the ioctl call 1748 * 1749 * Construct a set of configuration description structures and return 1750 * them to the user, including CRTC, connector and framebuffer configuration. 1751 * 1752 * Called by the user via ioctl. 1753 * 1754 * Returns: 1755 * Zero on success, negative errno on failure. 1756 */ 1757 int drm_mode_getresources(struct drm_device *dev, void *data, 1758 struct drm_file *file_priv) 1759 { 1760 struct drm_mode_card_res *card_res = data; 1761 struct list_head *lh; 1762 struct drm_framebuffer *fb; 1763 struct drm_connector *connector; 1764 struct drm_crtc *crtc; 1765 struct drm_encoder *encoder; 1766 int ret = 0; 1767 int connector_count = 0; 1768 int crtc_count = 0; 1769 int fb_count = 0; 1770 int encoder_count = 0; 1771 int copied = 0; 1772 uint32_t __user *fb_id; 1773 uint32_t __user *crtc_id; 1774 uint32_t __user *connector_id; 1775 uint32_t __user *encoder_id; 1776 1777 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1778 return -EINVAL; 1779 1780 1781 mutex_lock(&file_priv->fbs_lock); 1782 /* 1783 * For the non-control nodes we need to limit the list of resources 1784 * by IDs in the group list for this node 1785 */ 1786 list_for_each(lh, &file_priv->fbs) 1787 fb_count++; 1788 1789 /* handle this in 4 parts */ 1790 /* FBs */ 1791 if (card_res->count_fbs >= fb_count) { 1792 copied = 0; 1793 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1794 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1795 if (put_user(fb->base.id, fb_id + copied)) { 1796 mutex_unlock(&file_priv->fbs_lock); 1797 return -EFAULT; 1798 } 1799 copied++; 1800 } 1801 } 1802 card_res->count_fbs = fb_count; 1803 mutex_unlock(&file_priv->fbs_lock); 1804 1805 /* mode_config.mutex protects the connector list against e.g. DP MST 1806 * connector hot-adding. CRTC/Plane lists are invariant. */ 1807 mutex_lock(&dev->mode_config.mutex); 1808 drm_for_each_crtc(crtc, dev) 1809 crtc_count++; 1810 1811 drm_for_each_connector(connector, dev) 1812 connector_count++; 1813 1814 drm_for_each_encoder(encoder, dev) 1815 encoder_count++; 1816 1817 card_res->max_height = dev->mode_config.max_height; 1818 card_res->min_height = dev->mode_config.min_height; 1819 card_res->max_width = dev->mode_config.max_width; 1820 card_res->min_width = dev->mode_config.min_width; 1821 1822 /* CRTCs */ 1823 if (card_res->count_crtcs >= crtc_count) { 1824 copied = 0; 1825 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1826 drm_for_each_crtc(crtc, dev) { 1827 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 1828 if (put_user(crtc->base.id, crtc_id + copied)) { 1829 ret = -EFAULT; 1830 goto out; 1831 } 1832 copied++; 1833 } 1834 } 1835 card_res->count_crtcs = crtc_count; 1836 1837 /* Encoders */ 1838 if (card_res->count_encoders >= encoder_count) { 1839 copied = 0; 1840 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1841 drm_for_each_encoder(encoder, dev) { 1842 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1843 encoder->name); 1844 if (put_user(encoder->base.id, encoder_id + 1845 copied)) { 1846 ret = -EFAULT; 1847 goto out; 1848 } 1849 copied++; 1850 } 1851 } 1852 card_res->count_encoders = encoder_count; 1853 1854 /* Connectors */ 1855 if (card_res->count_connectors >= connector_count) { 1856 copied = 0; 1857 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1858 drm_for_each_connector(connector, dev) { 1859 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1860 connector->base.id, 1861 connector->name); 1862 if (put_user(connector->base.id, 1863 connector_id + copied)) { 1864 ret = -EFAULT; 1865 goto out; 1866 } 1867 copied++; 1868 } 1869 } 1870 card_res->count_connectors = connector_count; 1871 1872 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1873 card_res->count_connectors, card_res->count_encoders); 1874 1875 out: 1876 mutex_unlock(&dev->mode_config.mutex); 1877 return ret; 1878 } 1879 1880 /** 1881 * drm_mode_getcrtc - get CRTC configuration 1882 * @dev: drm device for the ioctl 1883 * @data: data pointer for the ioctl 1884 * @file_priv: drm file for the ioctl call 1885 * 1886 * Construct a CRTC configuration structure to return to the user. 1887 * 1888 * Called by the user via ioctl. 1889 * 1890 * Returns: 1891 * Zero on success, negative errno on failure. 1892 */ 1893 int drm_mode_getcrtc(struct drm_device *dev, 1894 void *data, struct drm_file *file_priv) 1895 { 1896 struct drm_mode_crtc *crtc_resp = data; 1897 struct drm_crtc *crtc; 1898 1899 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1900 return -EINVAL; 1901 1902 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 1903 if (!crtc) 1904 return -ENOENT; 1905 1906 drm_modeset_lock_crtc(crtc, crtc->primary); 1907 crtc_resp->gamma_size = crtc->gamma_size; 1908 if (crtc->primary->fb) 1909 crtc_resp->fb_id = crtc->primary->fb->base.id; 1910 else 1911 crtc_resp->fb_id = 0; 1912 1913 if (crtc->state) { 1914 crtc_resp->x = crtc->primary->state->src_x >> 16; 1915 crtc_resp->y = crtc->primary->state->src_y >> 16; 1916 if (crtc->state->enable) { 1917 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); 1918 crtc_resp->mode_valid = 1; 1919 1920 } else { 1921 crtc_resp->mode_valid = 0; 1922 } 1923 } else { 1924 crtc_resp->x = crtc->x; 1925 crtc_resp->y = crtc->y; 1926 if (crtc->enabled) { 1927 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); 1928 crtc_resp->mode_valid = 1; 1929 1930 } else { 1931 crtc_resp->mode_valid = 0; 1932 } 1933 } 1934 drm_modeset_unlock_crtc(crtc); 1935 1936 return 0; 1937 } 1938 1939 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 1940 const struct drm_file *file_priv) 1941 { 1942 /* 1943 * If user-space hasn't configured the driver to expose the stereo 3D 1944 * modes, don't expose them. 1945 */ 1946 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 1947 return false; 1948 1949 return true; 1950 } 1951 1952 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 1953 { 1954 /* For atomic drivers only state objects are synchronously updated and 1955 * protected by modeset locks, so check those first. */ 1956 if (connector->state) 1957 return connector->state->best_encoder; 1958 return connector->encoder; 1959 } 1960 1961 /* helper for getconnector and getproperties ioctls */ 1962 static int get_properties(struct drm_mode_object *obj, bool atomic, 1963 uint32_t __user *prop_ptr, uint64_t __user *prop_values, 1964 uint32_t *arg_count_props) 1965 { 1966 int props_count; 1967 int i, ret, copied; 1968 1969 props_count = obj->properties->count; 1970 if (!atomic) 1971 props_count -= obj->properties->atomic_count; 1972 1973 if ((*arg_count_props >= props_count) && props_count) { 1974 for (i = 0, copied = 0; copied < props_count; i++) { 1975 struct drm_property *prop = obj->properties->properties[i]; 1976 uint64_t val; 1977 1978 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) 1979 continue; 1980 1981 ret = drm_object_property_get_value(obj, prop, &val); 1982 if (ret) 1983 return ret; 1984 1985 if (put_user(prop->base.id, prop_ptr + copied)) 1986 return -EFAULT; 1987 1988 if (put_user(val, prop_values + copied)) 1989 return -EFAULT; 1990 1991 copied++; 1992 } 1993 } 1994 *arg_count_props = props_count; 1995 1996 return 0; 1997 } 1998 1999 /** 2000 * drm_mode_getconnector - get connector configuration 2001 * @dev: drm device for the ioctl 2002 * @data: data pointer for the ioctl 2003 * @file_priv: drm file for the ioctl call 2004 * 2005 * Construct a connector configuration structure to return to the user. 2006 * 2007 * Called by the user via ioctl. 2008 * 2009 * Returns: 2010 * Zero on success, negative errno on failure. 2011 */ 2012 int drm_mode_getconnector(struct drm_device *dev, void *data, 2013 struct drm_file *file_priv) 2014 { 2015 struct drm_mode_get_connector *out_resp = data; 2016 struct drm_connector *connector; 2017 struct drm_encoder *encoder; 2018 struct drm_display_mode *mode; 2019 int mode_count = 0; 2020 int encoders_count = 0; 2021 int ret = 0; 2022 int copied = 0; 2023 int i; 2024 struct drm_mode_modeinfo u_mode; 2025 struct drm_mode_modeinfo __user *mode_ptr; 2026 uint32_t __user *encoder_ptr; 2027 2028 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2029 return -EINVAL; 2030 2031 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2032 2033 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 2034 2035 mutex_lock(&dev->mode_config.mutex); 2036 2037 connector = drm_connector_find(dev, out_resp->connector_id); 2038 if (!connector) { 2039 ret = -ENOENT; 2040 goto out_unlock; 2041 } 2042 2043 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) 2044 if (connector->encoder_ids[i] != 0) 2045 encoders_count++; 2046 2047 if (out_resp->count_modes == 0) { 2048 connector->funcs->fill_modes(connector, 2049 dev->mode_config.max_width, 2050 dev->mode_config.max_height); 2051 } 2052 2053 /* delayed so we get modes regardless of pre-fill_modes state */ 2054 list_for_each_entry(mode, &connector->modes, head) 2055 if (drm_mode_expose_to_userspace(mode, file_priv)) 2056 mode_count++; 2057 2058 out_resp->connector_id = connector->base.id; 2059 out_resp->connector_type = connector->connector_type; 2060 out_resp->connector_type_id = connector->connector_type_id; 2061 out_resp->mm_width = connector->display_info.width_mm; 2062 out_resp->mm_height = connector->display_info.height_mm; 2063 out_resp->subpixel = connector->display_info.subpixel_order; 2064 out_resp->connection = connector->status; 2065 2066 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2067 encoder = drm_connector_get_encoder(connector); 2068 if (encoder) 2069 out_resp->encoder_id = encoder->base.id; 2070 else 2071 out_resp->encoder_id = 0; 2072 2073 /* 2074 * This ioctl is called twice, once to determine how much space is 2075 * needed, and the 2nd time to fill it. 2076 */ 2077 if ((out_resp->count_modes >= mode_count) && mode_count) { 2078 copied = 0; 2079 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2080 list_for_each_entry(mode, &connector->modes, head) { 2081 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2082 continue; 2083 2084 drm_mode_convert_to_umode(&u_mode, mode); 2085 if (copy_to_user(mode_ptr + copied, 2086 &u_mode, sizeof(u_mode))) { 2087 ret = -EFAULT; 2088 goto out; 2089 } 2090 copied++; 2091 } 2092 } 2093 out_resp->count_modes = mode_count; 2094 2095 ret = get_properties(&connector->base, file_priv->atomic, 2096 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2097 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2098 &out_resp->count_props); 2099 if (ret) 2100 goto out; 2101 2102 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2103 copied = 0; 2104 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2105 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2106 if (connector->encoder_ids[i] != 0) { 2107 if (put_user(connector->encoder_ids[i], 2108 encoder_ptr + copied)) { 2109 ret = -EFAULT; 2110 goto out; 2111 } 2112 copied++; 2113 } 2114 } 2115 } 2116 out_resp->count_encoders = encoders_count; 2117 2118 out: 2119 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2120 2121 out_unlock: 2122 mutex_unlock(&dev->mode_config.mutex); 2123 2124 return ret; 2125 } 2126 2127 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2128 { 2129 struct drm_connector *connector; 2130 struct drm_device *dev = encoder->dev; 2131 bool uses_atomic = false; 2132 2133 /* For atomic drivers only state objects are synchronously updated and 2134 * protected by modeset locks, so check those first. */ 2135 drm_for_each_connector(connector, dev) { 2136 if (!connector->state) 2137 continue; 2138 2139 uses_atomic = true; 2140 2141 if (connector->state->best_encoder != encoder) 2142 continue; 2143 2144 return connector->state->crtc; 2145 } 2146 2147 /* Don't return stale data (e.g. pending async disable). */ 2148 if (uses_atomic) 2149 return NULL; 2150 2151 return encoder->crtc; 2152 } 2153 2154 /** 2155 * drm_mode_getencoder - get encoder configuration 2156 * @dev: drm device for the ioctl 2157 * @data: data pointer for the ioctl 2158 * @file_priv: drm file for the ioctl call 2159 * 2160 * Construct a encoder configuration structure to return to the user. 2161 * 2162 * Called by the user via ioctl. 2163 * 2164 * Returns: 2165 * Zero on success, negative errno on failure. 2166 */ 2167 int drm_mode_getencoder(struct drm_device *dev, void *data, 2168 struct drm_file *file_priv) 2169 { 2170 struct drm_mode_get_encoder *enc_resp = data; 2171 struct drm_encoder *encoder; 2172 struct drm_crtc *crtc; 2173 2174 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2175 return -EINVAL; 2176 2177 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2178 if (!encoder) 2179 return -ENOENT; 2180 2181 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2182 crtc = drm_encoder_get_crtc(encoder); 2183 if (crtc) 2184 enc_resp->crtc_id = crtc->base.id; 2185 else 2186 enc_resp->crtc_id = 0; 2187 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2188 2189 enc_resp->encoder_type = encoder->encoder_type; 2190 enc_resp->encoder_id = encoder->base.id; 2191 enc_resp->possible_crtcs = encoder->possible_crtcs; 2192 enc_resp->possible_clones = encoder->possible_clones; 2193 2194 return 0; 2195 } 2196 2197 /** 2198 * drm_mode_getplane_res - enumerate all plane resources 2199 * @dev: DRM device 2200 * @data: ioctl data 2201 * @file_priv: DRM file info 2202 * 2203 * Construct a list of plane ids to return to the user. 2204 * 2205 * Called by the user via ioctl. 2206 * 2207 * Returns: 2208 * Zero on success, negative errno on failure. 2209 */ 2210 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2211 struct drm_file *file_priv) 2212 { 2213 struct drm_mode_get_plane_res *plane_resp = data; 2214 struct drm_mode_config *config; 2215 struct drm_plane *plane; 2216 uint32_t __user *plane_ptr; 2217 int copied = 0; 2218 unsigned num_planes; 2219 2220 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2221 return -EINVAL; 2222 2223 config = &dev->mode_config; 2224 2225 if (file_priv->universal_planes) 2226 num_planes = config->num_total_plane; 2227 else 2228 num_planes = config->num_overlay_plane; 2229 2230 /* 2231 * This ioctl is called twice, once to determine how much space is 2232 * needed, and the 2nd time to fill it. 2233 */ 2234 if (num_planes && 2235 (plane_resp->count_planes >= num_planes)) { 2236 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2237 2238 /* Plane lists are invariant, no locking needed. */ 2239 drm_for_each_plane(plane, dev) { 2240 /* 2241 * Unless userspace set the 'universal planes' 2242 * capability bit, only advertise overlays. 2243 */ 2244 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2245 !file_priv->universal_planes) 2246 continue; 2247 2248 if (put_user(plane->base.id, plane_ptr + copied)) 2249 return -EFAULT; 2250 copied++; 2251 } 2252 } 2253 plane_resp->count_planes = num_planes; 2254 2255 return 0; 2256 } 2257 2258 /** 2259 * drm_mode_getplane - get plane configuration 2260 * @dev: DRM device 2261 * @data: ioctl data 2262 * @file_priv: DRM file info 2263 * 2264 * Construct a plane configuration structure to return to the user. 2265 * 2266 * Called by the user via ioctl. 2267 * 2268 * Returns: 2269 * Zero on success, negative errno on failure. 2270 */ 2271 int drm_mode_getplane(struct drm_device *dev, void *data, 2272 struct drm_file *file_priv) 2273 { 2274 struct drm_mode_get_plane *plane_resp = data; 2275 struct drm_plane *plane; 2276 uint32_t __user *format_ptr; 2277 2278 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2279 return -EINVAL; 2280 2281 plane = drm_plane_find(dev, plane_resp->plane_id); 2282 if (!plane) 2283 return -ENOENT; 2284 2285 drm_modeset_lock(&plane->mutex, NULL); 2286 if (plane->crtc) 2287 plane_resp->crtc_id = plane->crtc->base.id; 2288 else 2289 plane_resp->crtc_id = 0; 2290 2291 if (plane->fb) 2292 plane_resp->fb_id = plane->fb->base.id; 2293 else 2294 plane_resp->fb_id = 0; 2295 drm_modeset_unlock(&plane->mutex); 2296 2297 plane_resp->plane_id = plane->base.id; 2298 plane_resp->possible_crtcs = plane->possible_crtcs; 2299 plane_resp->gamma_size = 0; 2300 2301 /* 2302 * This ioctl is called twice, once to determine how much space is 2303 * needed, and the 2nd time to fill it. 2304 */ 2305 if (plane->format_count && 2306 (plane_resp->count_format_types >= plane->format_count)) { 2307 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2308 if (copy_to_user(format_ptr, 2309 plane->format_types, 2310 sizeof(uint32_t) * plane->format_count)) { 2311 return -EFAULT; 2312 } 2313 } 2314 plane_resp->count_format_types = plane->format_count; 2315 2316 return 0; 2317 } 2318 2319 /** 2320 * drm_plane_check_pixel_format - Check if the plane supports the pixel format 2321 * @plane: plane to check for format support 2322 * @format: the pixel format 2323 * 2324 * Returns: 2325 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL 2326 * otherwise. 2327 */ 2328 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format) 2329 { 2330 unsigned int i; 2331 2332 for (i = 0; i < plane->format_count; i++) { 2333 if (format == plane->format_types[i]) 2334 return 0; 2335 } 2336 2337 return -EINVAL; 2338 } 2339 2340 static int check_src_coords(uint32_t src_x, uint32_t src_y, 2341 uint32_t src_w, uint32_t src_h, 2342 const struct drm_framebuffer *fb) 2343 { 2344 unsigned int fb_width, fb_height; 2345 2346 fb_width = fb->width << 16; 2347 fb_height = fb->height << 16; 2348 2349 /* Make sure source coordinates are inside the fb. */ 2350 if (src_w > fb_width || 2351 src_x > fb_width - src_w || 2352 src_h > fb_height || 2353 src_y > fb_height - src_h) { 2354 DRM_DEBUG_KMS("Invalid source coordinates " 2355 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2356 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2357 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2358 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2359 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2360 return -ENOSPC; 2361 } 2362 2363 return 0; 2364 } 2365 2366 /* 2367 * setplane_internal - setplane handler for internal callers 2368 * 2369 * Note that we assume an extra reference has already been taken on fb. If the 2370 * update fails, this reference will be dropped before return; if it succeeds, 2371 * the previous framebuffer (if any) will be unreferenced instead. 2372 * 2373 * src_{x,y,w,h} are provided in 16.16 fixed point format 2374 */ 2375 static int __setplane_internal(struct drm_plane *plane, 2376 struct drm_crtc *crtc, 2377 struct drm_framebuffer *fb, 2378 int32_t crtc_x, int32_t crtc_y, 2379 uint32_t crtc_w, uint32_t crtc_h, 2380 /* src_{x,y,w,h} values are 16.16 fixed point */ 2381 uint32_t src_x, uint32_t src_y, 2382 uint32_t src_w, uint32_t src_h) 2383 { 2384 int ret = 0; 2385 2386 /* No fb means shut it down */ 2387 if (!fb) { 2388 plane->old_fb = plane->fb; 2389 ret = plane->funcs->disable_plane(plane); 2390 if (!ret) { 2391 plane->crtc = NULL; 2392 plane->fb = NULL; 2393 } else { 2394 plane->old_fb = NULL; 2395 } 2396 goto out; 2397 } 2398 2399 /* Check whether this plane is usable on this CRTC */ 2400 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2401 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2402 ret = -EINVAL; 2403 goto out; 2404 } 2405 2406 /* Check whether this plane supports the fb pixel format. */ 2407 ret = drm_plane_check_pixel_format(plane, fb->pixel_format); 2408 if (ret) { 2409 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2410 drm_get_format_name(fb->pixel_format)); 2411 goto out; 2412 } 2413 2414 /* Give drivers some help against integer overflows */ 2415 if (crtc_w > INT_MAX || 2416 crtc_x > INT_MAX - (int32_t) crtc_w || 2417 crtc_h > INT_MAX || 2418 crtc_y > INT_MAX - (int32_t) crtc_h) { 2419 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2420 crtc_w, crtc_h, crtc_x, crtc_y); 2421 ret = -ERANGE; 2422 goto out; 2423 } 2424 2425 ret = check_src_coords(src_x, src_y, src_w, src_h, fb); 2426 if (ret) 2427 goto out; 2428 2429 plane->old_fb = plane->fb; 2430 ret = plane->funcs->update_plane(plane, crtc, fb, 2431 crtc_x, crtc_y, crtc_w, crtc_h, 2432 src_x, src_y, src_w, src_h); 2433 if (!ret) { 2434 plane->crtc = crtc; 2435 plane->fb = fb; 2436 fb = NULL; 2437 } else { 2438 plane->old_fb = NULL; 2439 } 2440 2441 out: 2442 if (fb) 2443 drm_framebuffer_unreference(fb); 2444 if (plane->old_fb) 2445 drm_framebuffer_unreference(plane->old_fb); 2446 plane->old_fb = NULL; 2447 2448 return ret; 2449 } 2450 2451 static int setplane_internal(struct drm_plane *plane, 2452 struct drm_crtc *crtc, 2453 struct drm_framebuffer *fb, 2454 int32_t crtc_x, int32_t crtc_y, 2455 uint32_t crtc_w, uint32_t crtc_h, 2456 /* src_{x,y,w,h} values are 16.16 fixed point */ 2457 uint32_t src_x, uint32_t src_y, 2458 uint32_t src_w, uint32_t src_h) 2459 { 2460 int ret; 2461 2462 drm_modeset_lock_all(plane->dev); 2463 ret = __setplane_internal(plane, crtc, fb, 2464 crtc_x, crtc_y, crtc_w, crtc_h, 2465 src_x, src_y, src_w, src_h); 2466 drm_modeset_unlock_all(plane->dev); 2467 2468 return ret; 2469 } 2470 2471 /** 2472 * drm_mode_setplane - configure a plane's configuration 2473 * @dev: DRM device 2474 * @data: ioctl data* 2475 * @file_priv: DRM file info 2476 * 2477 * Set plane configuration, including placement, fb, scaling, and other factors. 2478 * Or pass a NULL fb to disable (planes may be disabled without providing a 2479 * valid crtc). 2480 * 2481 * Returns: 2482 * Zero on success, negative errno on failure. 2483 */ 2484 int drm_mode_setplane(struct drm_device *dev, void *data, 2485 struct drm_file *file_priv) 2486 { 2487 struct drm_mode_set_plane *plane_req = data; 2488 struct drm_plane *plane; 2489 struct drm_crtc *crtc = NULL; 2490 struct drm_framebuffer *fb = NULL; 2491 2492 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2493 return -EINVAL; 2494 2495 /* 2496 * First, find the plane, crtc, and fb objects. If not available, 2497 * we don't bother to call the driver. 2498 */ 2499 plane = drm_plane_find(dev, plane_req->plane_id); 2500 if (!plane) { 2501 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2502 plane_req->plane_id); 2503 return -ENOENT; 2504 } 2505 2506 if (plane_req->fb_id) { 2507 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2508 if (!fb) { 2509 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2510 plane_req->fb_id); 2511 return -ENOENT; 2512 } 2513 2514 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2515 if (!crtc) { 2516 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2517 plane_req->crtc_id); 2518 return -ENOENT; 2519 } 2520 } 2521 2522 /* 2523 * setplane_internal will take care of deref'ing either the old or new 2524 * framebuffer depending on success. 2525 */ 2526 return setplane_internal(plane, crtc, fb, 2527 plane_req->crtc_x, plane_req->crtc_y, 2528 plane_req->crtc_w, plane_req->crtc_h, 2529 plane_req->src_x, plane_req->src_y, 2530 plane_req->src_w, plane_req->src_h); 2531 } 2532 2533 /** 2534 * drm_mode_set_config_internal - helper to call ->set_config 2535 * @set: modeset config to set 2536 * 2537 * This is a little helper to wrap internal calls to the ->set_config driver 2538 * interface. The only thing it adds is correct refcounting dance. 2539 * 2540 * Returns: 2541 * Zero on success, negative errno on failure. 2542 */ 2543 int drm_mode_set_config_internal(struct drm_mode_set *set) 2544 { 2545 struct drm_crtc *crtc = set->crtc; 2546 struct drm_framebuffer *fb; 2547 struct drm_crtc *tmp; 2548 int ret; 2549 2550 /* 2551 * NOTE: ->set_config can also disable other crtcs (if we steal all 2552 * connectors from it), hence we need to refcount the fbs across all 2553 * crtcs. Atomic modeset will have saner semantics ... 2554 */ 2555 drm_for_each_crtc(tmp, crtc->dev) 2556 tmp->primary->old_fb = tmp->primary->fb; 2557 2558 fb = set->fb; 2559 2560 ret = crtc->funcs->set_config(set); 2561 if (ret == 0) { 2562 crtc->primary->crtc = crtc; 2563 crtc->primary->fb = fb; 2564 } 2565 2566 drm_for_each_crtc(tmp, crtc->dev) { 2567 if (tmp->primary->fb) 2568 drm_framebuffer_reference(tmp->primary->fb); 2569 if (tmp->primary->old_fb) 2570 drm_framebuffer_unreference(tmp->primary->old_fb); 2571 tmp->primary->old_fb = NULL; 2572 } 2573 2574 return ret; 2575 } 2576 EXPORT_SYMBOL(drm_mode_set_config_internal); 2577 2578 /** 2579 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode 2580 * @mode: mode to query 2581 * @hdisplay: hdisplay value to fill in 2582 * @vdisplay: vdisplay value to fill in 2583 * 2584 * The vdisplay value will be doubled if the specified mode is a stereo mode of 2585 * the appropriate layout. 2586 */ 2587 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, 2588 int *hdisplay, int *vdisplay) 2589 { 2590 struct drm_display_mode adjusted; 2591 2592 drm_mode_copy(&adjusted, mode); 2593 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 2594 *hdisplay = adjusted.crtc_hdisplay; 2595 *vdisplay = adjusted.crtc_vdisplay; 2596 } 2597 EXPORT_SYMBOL(drm_crtc_get_hv_timing); 2598 2599 /** 2600 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2601 * CRTC viewport 2602 * @crtc: CRTC that framebuffer will be displayed on 2603 * @x: x panning 2604 * @y: y panning 2605 * @mode: mode that framebuffer will be displayed under 2606 * @fb: framebuffer to check size of 2607 */ 2608 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2609 int x, int y, 2610 const struct drm_display_mode *mode, 2611 const struct drm_framebuffer *fb) 2612 2613 { 2614 int hdisplay, vdisplay; 2615 2616 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); 2617 2618 if (crtc->state && 2619 crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) | 2620 BIT(DRM_ROTATE_270))) 2621 swap(hdisplay, vdisplay); 2622 2623 return check_src_coords(x << 16, y << 16, 2624 hdisplay << 16, vdisplay << 16, fb); 2625 } 2626 EXPORT_SYMBOL(drm_crtc_check_viewport); 2627 2628 /** 2629 * drm_mode_setcrtc - set CRTC configuration 2630 * @dev: drm device for the ioctl 2631 * @data: data pointer for the ioctl 2632 * @file_priv: drm file for the ioctl call 2633 * 2634 * Build a new CRTC configuration based on user request. 2635 * 2636 * Called by the user via ioctl. 2637 * 2638 * Returns: 2639 * Zero on success, negative errno on failure. 2640 */ 2641 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2642 struct drm_file *file_priv) 2643 { 2644 struct drm_mode_config *config = &dev->mode_config; 2645 struct drm_mode_crtc *crtc_req = data; 2646 struct drm_crtc *crtc; 2647 struct drm_connector **connector_set = NULL, *connector; 2648 struct drm_framebuffer *fb = NULL; 2649 struct drm_display_mode *mode = NULL; 2650 struct drm_mode_set set; 2651 uint32_t __user *set_connectors_ptr; 2652 int ret; 2653 int i; 2654 2655 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2656 return -EINVAL; 2657 2658 /* 2659 * Universal plane src offsets are only 16.16, prevent havoc for 2660 * drivers using universal plane code internally. 2661 */ 2662 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) 2663 return -ERANGE; 2664 2665 drm_modeset_lock_all(dev); 2666 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2667 if (!crtc) { 2668 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2669 ret = -ENOENT; 2670 goto out; 2671 } 2672 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 2673 2674 if (crtc_req->mode_valid) { 2675 /* If we have a mode we need a framebuffer. */ 2676 /* If we pass -1, set the mode with the currently bound fb */ 2677 if (crtc_req->fb_id == -1) { 2678 if (!crtc->primary->fb) { 2679 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2680 ret = -EINVAL; 2681 goto out; 2682 } 2683 fb = crtc->primary->fb; 2684 /* Make refcounting symmetric with the lookup path. */ 2685 drm_framebuffer_reference(fb); 2686 } else { 2687 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2688 if (!fb) { 2689 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2690 crtc_req->fb_id); 2691 ret = -ENOENT; 2692 goto out; 2693 } 2694 } 2695 2696 mode = drm_mode_create(dev); 2697 if (!mode) { 2698 ret = -ENOMEM; 2699 goto out; 2700 } 2701 2702 ret = drm_mode_convert_umode(mode, &crtc_req->mode); 2703 if (ret) { 2704 DRM_DEBUG_KMS("Invalid mode\n"); 2705 goto out; 2706 } 2707 2708 /* 2709 * Check whether the primary plane supports the fb pixel format. 2710 * Drivers not implementing the universal planes API use a 2711 * default formats list provided by the DRM core which doesn't 2712 * match real hardware capabilities. Skip the check in that 2713 * case. 2714 */ 2715 if (!crtc->primary->format_default) { 2716 ret = drm_plane_check_pixel_format(crtc->primary, 2717 fb->pixel_format); 2718 if (ret) { 2719 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2720 drm_get_format_name(fb->pixel_format)); 2721 goto out; 2722 } 2723 } 2724 2725 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2726 mode, fb); 2727 if (ret) 2728 goto out; 2729 2730 } 2731 2732 if (crtc_req->count_connectors == 0 && mode) { 2733 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2734 ret = -EINVAL; 2735 goto out; 2736 } 2737 2738 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2739 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2740 crtc_req->count_connectors); 2741 ret = -EINVAL; 2742 goto out; 2743 } 2744 2745 if (crtc_req->count_connectors > 0) { 2746 u32 out_id; 2747 2748 /* Avoid unbounded kernel memory allocation */ 2749 if (crtc_req->count_connectors > config->num_connector) { 2750 ret = -EINVAL; 2751 goto out; 2752 } 2753 2754 connector_set = kmalloc_array(crtc_req->count_connectors, 2755 sizeof(struct drm_connector *), 2756 GFP_KERNEL); 2757 if (!connector_set) { 2758 ret = -ENOMEM; 2759 goto out; 2760 } 2761 2762 for (i = 0; i < crtc_req->count_connectors; i++) { 2763 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2764 if (get_user(out_id, &set_connectors_ptr[i])) { 2765 ret = -EFAULT; 2766 goto out; 2767 } 2768 2769 connector = drm_connector_find(dev, out_id); 2770 if (!connector) { 2771 DRM_DEBUG_KMS("Connector id %d unknown\n", 2772 out_id); 2773 ret = -ENOENT; 2774 goto out; 2775 } 2776 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2777 connector->base.id, 2778 connector->name); 2779 2780 connector_set[i] = connector; 2781 } 2782 } 2783 2784 set.crtc = crtc; 2785 set.x = crtc_req->x; 2786 set.y = crtc_req->y; 2787 set.mode = mode; 2788 set.connectors = connector_set; 2789 set.num_connectors = crtc_req->count_connectors; 2790 set.fb = fb; 2791 ret = drm_mode_set_config_internal(&set); 2792 2793 out: 2794 if (fb) 2795 drm_framebuffer_unreference(fb); 2796 2797 kfree(connector_set); 2798 drm_mode_destroy(dev, mode); 2799 drm_modeset_unlock_all(dev); 2800 return ret; 2801 } 2802 2803 /** 2804 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2805 * universal plane handler call 2806 * @crtc: crtc to update cursor for 2807 * @req: data pointer for the ioctl 2808 * @file_priv: drm file for the ioctl call 2809 * 2810 * Legacy cursor ioctl's work directly with driver buffer handles. To 2811 * translate legacy ioctl calls into universal plane handler calls, we need to 2812 * wrap the native buffer handle in a drm_framebuffer. 2813 * 2814 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2815 * buffer with a pitch of 4*width; the universal plane interface should be used 2816 * directly in cases where the hardware can support other buffer settings and 2817 * userspace wants to make use of these capabilities. 2818 * 2819 * Returns: 2820 * Zero on success, negative errno on failure. 2821 */ 2822 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2823 struct drm_mode_cursor2 *req, 2824 struct drm_file *file_priv) 2825 { 2826 struct drm_device *dev = crtc->dev; 2827 struct drm_framebuffer *fb = NULL; 2828 struct drm_mode_fb_cmd2 fbreq = { 2829 .width = req->width, 2830 .height = req->height, 2831 .pixel_format = DRM_FORMAT_ARGB8888, 2832 .pitches = { req->width * 4 }, 2833 .handles = { req->handle }, 2834 }; 2835 int32_t crtc_x, crtc_y; 2836 uint32_t crtc_w = 0, crtc_h = 0; 2837 uint32_t src_w = 0, src_h = 0; 2838 int ret = 0; 2839 2840 BUG_ON(!crtc->cursor); 2841 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2842 2843 /* 2844 * Obtain fb we'll be using (either new or existing) and take an extra 2845 * reference to it if fb != null. setplane will take care of dropping 2846 * the reference if the plane update fails. 2847 */ 2848 if (req->flags & DRM_MODE_CURSOR_BO) { 2849 if (req->handle) { 2850 fb = internal_framebuffer_create(dev, &fbreq, file_priv); 2851 if (IS_ERR(fb)) { 2852 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2853 return PTR_ERR(fb); 2854 } 2855 } else { 2856 fb = NULL; 2857 } 2858 } else { 2859 fb = crtc->cursor->fb; 2860 if (fb) 2861 drm_framebuffer_reference(fb); 2862 } 2863 2864 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2865 crtc_x = req->x; 2866 crtc_y = req->y; 2867 } else { 2868 crtc_x = crtc->cursor_x; 2869 crtc_y = crtc->cursor_y; 2870 } 2871 2872 if (fb) { 2873 crtc_w = fb->width; 2874 crtc_h = fb->height; 2875 src_w = fb->width << 16; 2876 src_h = fb->height << 16; 2877 } 2878 2879 /* 2880 * setplane_internal will take care of deref'ing either the old or new 2881 * framebuffer depending on success. 2882 */ 2883 ret = __setplane_internal(crtc->cursor, crtc, fb, 2884 crtc_x, crtc_y, crtc_w, crtc_h, 2885 0, 0, src_w, src_h); 2886 2887 /* Update successful; save new cursor position, if necessary */ 2888 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2889 crtc->cursor_x = req->x; 2890 crtc->cursor_y = req->y; 2891 } 2892 2893 return ret; 2894 } 2895 2896 static int drm_mode_cursor_common(struct drm_device *dev, 2897 struct drm_mode_cursor2 *req, 2898 struct drm_file *file_priv) 2899 { 2900 struct drm_crtc *crtc; 2901 int ret = 0; 2902 2903 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2904 return -EINVAL; 2905 2906 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 2907 return -EINVAL; 2908 2909 crtc = drm_crtc_find(dev, req->crtc_id); 2910 if (!crtc) { 2911 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 2912 return -ENOENT; 2913 } 2914 2915 /* 2916 * If this crtc has a universal cursor plane, call that plane's update 2917 * handler rather than using legacy cursor handlers. 2918 */ 2919 drm_modeset_lock_crtc(crtc, crtc->cursor); 2920 if (crtc->cursor) { 2921 ret = drm_mode_cursor_universal(crtc, req, file_priv); 2922 goto out; 2923 } 2924 2925 if (req->flags & DRM_MODE_CURSOR_BO) { 2926 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 2927 ret = -ENXIO; 2928 goto out; 2929 } 2930 /* Turns off the cursor if handle is 0 */ 2931 if (crtc->funcs->cursor_set2) 2932 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 2933 req->width, req->height, req->hot_x, req->hot_y); 2934 else 2935 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 2936 req->width, req->height); 2937 } 2938 2939 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2940 if (crtc->funcs->cursor_move) { 2941 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 2942 } else { 2943 ret = -EFAULT; 2944 goto out; 2945 } 2946 } 2947 out: 2948 drm_modeset_unlock_crtc(crtc); 2949 2950 return ret; 2951 2952 } 2953 2954 2955 /** 2956 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 2957 * @dev: drm device for the ioctl 2958 * @data: data pointer for the ioctl 2959 * @file_priv: drm file for the ioctl call 2960 * 2961 * Set the cursor configuration based on user request. 2962 * 2963 * Called by the user via ioctl. 2964 * 2965 * Returns: 2966 * Zero on success, negative errno on failure. 2967 */ 2968 int drm_mode_cursor_ioctl(struct drm_device *dev, 2969 void *data, struct drm_file *file_priv) 2970 { 2971 struct drm_mode_cursor *req = data; 2972 struct drm_mode_cursor2 new_req; 2973 2974 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 2975 new_req.hot_x = new_req.hot_y = 0; 2976 2977 return drm_mode_cursor_common(dev, &new_req, file_priv); 2978 } 2979 2980 /** 2981 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 2982 * @dev: drm device for the ioctl 2983 * @data: data pointer for the ioctl 2984 * @file_priv: drm file for the ioctl call 2985 * 2986 * Set the cursor configuration based on user request. This implements the 2nd 2987 * version of the cursor ioctl, which allows userspace to additionally specify 2988 * the hotspot of the pointer. 2989 * 2990 * Called by the user via ioctl. 2991 * 2992 * Returns: 2993 * Zero on success, negative errno on failure. 2994 */ 2995 int drm_mode_cursor2_ioctl(struct drm_device *dev, 2996 void *data, struct drm_file *file_priv) 2997 { 2998 struct drm_mode_cursor2 *req = data; 2999 3000 return drm_mode_cursor_common(dev, req, file_priv); 3001 } 3002 3003 /** 3004 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 3005 * @bpp: bits per pixels 3006 * @depth: bit depth per pixel 3007 * 3008 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 3009 * Useful in fbdev emulation code, since that deals in those values. 3010 */ 3011 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 3012 { 3013 uint32_t fmt; 3014 3015 switch (bpp) { 3016 case 8: 3017 fmt = DRM_FORMAT_C8; 3018 break; 3019 case 16: 3020 if (depth == 15) 3021 fmt = DRM_FORMAT_XRGB1555; 3022 else 3023 fmt = DRM_FORMAT_RGB565; 3024 break; 3025 case 24: 3026 fmt = DRM_FORMAT_RGB888; 3027 break; 3028 case 32: 3029 if (depth == 24) 3030 fmt = DRM_FORMAT_XRGB8888; 3031 else if (depth == 30) 3032 fmt = DRM_FORMAT_XRGB2101010; 3033 else 3034 fmt = DRM_FORMAT_ARGB8888; 3035 break; 3036 default: 3037 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3038 fmt = DRM_FORMAT_XRGB8888; 3039 break; 3040 } 3041 3042 return fmt; 3043 } 3044 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3045 3046 /** 3047 * drm_mode_addfb - add an FB to the graphics configuration 3048 * @dev: drm device for the ioctl 3049 * @data: data pointer for the ioctl 3050 * @file_priv: drm file for the ioctl call 3051 * 3052 * Add a new FB to the specified CRTC, given a user request. This is the 3053 * original addfb ioctl which only supported RGB formats. 3054 * 3055 * Called by the user via ioctl. 3056 * 3057 * Returns: 3058 * Zero on success, negative errno on failure. 3059 */ 3060 int drm_mode_addfb(struct drm_device *dev, 3061 void *data, struct drm_file *file_priv) 3062 { 3063 struct drm_mode_fb_cmd *or = data; 3064 struct drm_mode_fb_cmd2 r = {}; 3065 int ret; 3066 3067 /* convert to new format and call new ioctl */ 3068 r.fb_id = or->fb_id; 3069 r.width = or->width; 3070 r.height = or->height; 3071 r.pitches[0] = or->pitch; 3072 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3073 r.handles[0] = or->handle; 3074 3075 ret = drm_mode_addfb2(dev, &r, file_priv); 3076 if (ret) 3077 return ret; 3078 3079 or->fb_id = r.fb_id; 3080 3081 return 0; 3082 } 3083 3084 static int format_check(const struct drm_mode_fb_cmd2 *r) 3085 { 3086 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3087 3088 switch (format) { 3089 case DRM_FORMAT_C8: 3090 case DRM_FORMAT_RGB332: 3091 case DRM_FORMAT_BGR233: 3092 case DRM_FORMAT_XRGB4444: 3093 case DRM_FORMAT_XBGR4444: 3094 case DRM_FORMAT_RGBX4444: 3095 case DRM_FORMAT_BGRX4444: 3096 case DRM_FORMAT_ARGB4444: 3097 case DRM_FORMAT_ABGR4444: 3098 case DRM_FORMAT_RGBA4444: 3099 case DRM_FORMAT_BGRA4444: 3100 case DRM_FORMAT_XRGB1555: 3101 case DRM_FORMAT_XBGR1555: 3102 case DRM_FORMAT_RGBX5551: 3103 case DRM_FORMAT_BGRX5551: 3104 case DRM_FORMAT_ARGB1555: 3105 case DRM_FORMAT_ABGR1555: 3106 case DRM_FORMAT_RGBA5551: 3107 case DRM_FORMAT_BGRA5551: 3108 case DRM_FORMAT_RGB565: 3109 case DRM_FORMAT_BGR565: 3110 case DRM_FORMAT_RGB888: 3111 case DRM_FORMAT_BGR888: 3112 case DRM_FORMAT_XRGB8888: 3113 case DRM_FORMAT_XBGR8888: 3114 case DRM_FORMAT_RGBX8888: 3115 case DRM_FORMAT_BGRX8888: 3116 case DRM_FORMAT_ARGB8888: 3117 case DRM_FORMAT_ABGR8888: 3118 case DRM_FORMAT_RGBA8888: 3119 case DRM_FORMAT_BGRA8888: 3120 case DRM_FORMAT_XRGB2101010: 3121 case DRM_FORMAT_XBGR2101010: 3122 case DRM_FORMAT_RGBX1010102: 3123 case DRM_FORMAT_BGRX1010102: 3124 case DRM_FORMAT_ARGB2101010: 3125 case DRM_FORMAT_ABGR2101010: 3126 case DRM_FORMAT_RGBA1010102: 3127 case DRM_FORMAT_BGRA1010102: 3128 case DRM_FORMAT_YUYV: 3129 case DRM_FORMAT_YVYU: 3130 case DRM_FORMAT_UYVY: 3131 case DRM_FORMAT_VYUY: 3132 case DRM_FORMAT_AYUV: 3133 case DRM_FORMAT_NV12: 3134 case DRM_FORMAT_NV21: 3135 case DRM_FORMAT_NV16: 3136 case DRM_FORMAT_NV61: 3137 case DRM_FORMAT_NV24: 3138 case DRM_FORMAT_NV42: 3139 case DRM_FORMAT_YUV410: 3140 case DRM_FORMAT_YVU410: 3141 case DRM_FORMAT_YUV411: 3142 case DRM_FORMAT_YVU411: 3143 case DRM_FORMAT_YUV420: 3144 case DRM_FORMAT_YVU420: 3145 case DRM_FORMAT_YUV422: 3146 case DRM_FORMAT_YVU422: 3147 case DRM_FORMAT_YUV444: 3148 case DRM_FORMAT_YVU444: 3149 return 0; 3150 default: 3151 DRM_DEBUG_KMS("invalid pixel format %s\n", 3152 drm_get_format_name(r->pixel_format)); 3153 return -EINVAL; 3154 } 3155 } 3156 3157 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3158 { 3159 int ret, hsub, vsub, num_planes, i; 3160 3161 ret = format_check(r); 3162 if (ret) { 3163 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3164 drm_get_format_name(r->pixel_format)); 3165 return ret; 3166 } 3167 3168 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3169 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3170 num_planes = drm_format_num_planes(r->pixel_format); 3171 3172 if (r->width == 0 || r->width % hsub) { 3173 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3174 return -EINVAL; 3175 } 3176 3177 if (r->height == 0 || r->height % vsub) { 3178 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3179 return -EINVAL; 3180 } 3181 3182 for (i = 0; i < num_planes; i++) { 3183 unsigned int width = r->width / (i != 0 ? hsub : 1); 3184 unsigned int height = r->height / (i != 0 ? vsub : 1); 3185 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3186 3187 if (!r->handles[i]) { 3188 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3189 return -EINVAL; 3190 } 3191 3192 if ((uint64_t) width * cpp > UINT_MAX) 3193 return -ERANGE; 3194 3195 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3196 return -ERANGE; 3197 3198 if (r->pitches[i] < width * cpp) { 3199 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3200 return -EINVAL; 3201 } 3202 3203 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { 3204 DRM_DEBUG_KMS("bad fb modifier %"PRIu64" for plane %d\n", 3205 r->modifier[i], i); 3206 return -EINVAL; 3207 } 3208 3209 /* modifier specific checks: */ 3210 switch (r->modifier[i]) { 3211 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: 3212 /* NOTE: the pitch restriction may be lifted later if it turns 3213 * out that no hw has this restriction: 3214 */ 3215 if (r->pixel_format != DRM_FORMAT_NV12 || 3216 width % 128 || height % 32 || 3217 r->pitches[i] % 128) { 3218 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i); 3219 return -EINVAL; 3220 } 3221 break; 3222 3223 default: 3224 break; 3225 } 3226 } 3227 3228 for (i = num_planes; i < 4; i++) { 3229 if (r->modifier[i]) { 3230 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i); 3231 return -EINVAL; 3232 } 3233 3234 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ 3235 if (!(r->flags & DRM_MODE_FB_MODIFIERS)) 3236 continue; 3237 3238 if (r->handles[i]) { 3239 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i); 3240 return -EINVAL; 3241 } 3242 3243 if (r->pitches[i]) { 3244 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i); 3245 return -EINVAL; 3246 } 3247 3248 if (r->offsets[i]) { 3249 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i); 3250 return -EINVAL; 3251 } 3252 } 3253 3254 return 0; 3255 } 3256 3257 static struct drm_framebuffer * 3258 internal_framebuffer_create(struct drm_device *dev, 3259 struct drm_mode_fb_cmd2 *r, 3260 struct drm_file *file_priv) 3261 { 3262 struct drm_mode_config *config = &dev->mode_config; 3263 struct drm_framebuffer *fb; 3264 int ret; 3265 3266 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { 3267 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3268 return ERR_PTR(-EINVAL); 3269 } 3270 3271 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3272 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3273 r->width, config->min_width, config->max_width); 3274 return ERR_PTR(-EINVAL); 3275 } 3276 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3277 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3278 r->height, config->min_height, config->max_height); 3279 return ERR_PTR(-EINVAL); 3280 } 3281 3282 if (r->flags & DRM_MODE_FB_MODIFIERS && 3283 !dev->mode_config.allow_fb_modifiers) { 3284 DRM_DEBUG_KMS("driver does not support fb modifiers\n"); 3285 return ERR_PTR(-EINVAL); 3286 } 3287 3288 ret = framebuffer_check(r); 3289 if (ret) 3290 return ERR_PTR(ret); 3291 3292 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3293 if (IS_ERR(fb)) { 3294 DRM_DEBUG_KMS("could not create framebuffer\n"); 3295 return fb; 3296 } 3297 3298 return fb; 3299 } 3300 3301 /** 3302 * drm_mode_addfb2 - add an FB to the graphics configuration 3303 * @dev: drm device for the ioctl 3304 * @data: data pointer for the ioctl 3305 * @file_priv: drm file for the ioctl call 3306 * 3307 * Add a new FB to the specified CRTC, given a user request with format. This is 3308 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3309 * and uses fourcc codes as pixel format specifiers. 3310 * 3311 * Called by the user via ioctl. 3312 * 3313 * Returns: 3314 * Zero on success, negative errno on failure. 3315 */ 3316 int drm_mode_addfb2(struct drm_device *dev, 3317 void *data, struct drm_file *file_priv) 3318 { 3319 struct drm_mode_fb_cmd2 *r = data; 3320 struct drm_framebuffer *fb; 3321 3322 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3323 return -EINVAL; 3324 3325 fb = internal_framebuffer_create(dev, r, file_priv); 3326 if (IS_ERR(fb)) 3327 return PTR_ERR(fb); 3328 3329 /* Transfer ownership to the filp for reaping on close */ 3330 3331 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3332 mutex_lock(&file_priv->fbs_lock); 3333 r->fb_id = fb->base.id; 3334 list_add(&fb->filp_head, &file_priv->fbs); 3335 mutex_unlock(&file_priv->fbs_lock); 3336 3337 return 0; 3338 } 3339 3340 struct drm_mode_rmfb_work { 3341 struct work_struct work; 3342 struct list_head fbs; 3343 }; 3344 3345 static void drm_mode_rmfb_work_fn(struct work_struct *w) 3346 { 3347 struct drm_mode_rmfb_work *arg = container_of(w, typeof(*arg), work); 3348 3349 while (!list_empty(&arg->fbs)) { 3350 struct drm_framebuffer *fb = 3351 list_first_entry(&arg->fbs, typeof(*fb), filp_head); 3352 3353 list_del_init(&fb->filp_head); 3354 drm_framebuffer_remove(fb); 3355 } 3356 } 3357 3358 /** 3359 * drm_mode_rmfb - remove an FB from the configuration 3360 * @dev: drm device for the ioctl 3361 * @data: data pointer for the ioctl 3362 * @file_priv: drm file for the ioctl call 3363 * 3364 * Remove the FB specified by the user. 3365 * 3366 * Called by the user via ioctl. 3367 * 3368 * Returns: 3369 * Zero on success, negative errno on failure. 3370 */ 3371 int drm_mode_rmfb(struct drm_device *dev, 3372 void *data, struct drm_file *file_priv) 3373 { 3374 struct drm_framebuffer *fb = NULL; 3375 struct drm_framebuffer *fbl = NULL; 3376 uint32_t *id = data; 3377 int found = 0; 3378 3379 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3380 return -EINVAL; 3381 3382 mutex_lock(&file_priv->fbs_lock); 3383 mutex_lock(&dev->mode_config.fb_lock); 3384 fb = __drm_framebuffer_lookup(dev, *id); 3385 if (!fb) 3386 goto fail_lookup; 3387 3388 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3389 if (fb == fbl) 3390 found = 1; 3391 if (!found) 3392 goto fail_lookup; 3393 3394 list_del_init(&fb->filp_head); 3395 mutex_unlock(&dev->mode_config.fb_lock); 3396 mutex_unlock(&file_priv->fbs_lock); 3397 3398 /* 3399 * we now own the reference that was stored in the fbs list 3400 * 3401 * drm_framebuffer_remove may fail with -EINTR on pending signals, 3402 * so run this in a separate stack as there's no way to correctly 3403 * handle this after the fb is already removed from the lookup table. 3404 */ 3405 if (!kref_exclusive_p(&fb->refcount)) { 3406 struct drm_mode_rmfb_work arg; 3407 3408 INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); 3409 INIT_LIST_HEAD(&arg.fbs); 3410 list_add_tail(&fb->filp_head, &arg.fbs); 3411 3412 schedule_work(&arg.work); 3413 flush_work(&arg.work); 3414 destroy_work_on_stack(&arg.work); 3415 } else 3416 drm_framebuffer_unreference(fb); 3417 3418 return 0; 3419 3420 fail_lookup: 3421 mutex_unlock(&dev->mode_config.fb_lock); 3422 mutex_unlock(&file_priv->fbs_lock); 3423 3424 return -ENOENT; 3425 } 3426 3427 /** 3428 * drm_mode_getfb - get FB info 3429 * @dev: drm device for the ioctl 3430 * @data: data pointer for the ioctl 3431 * @file_priv: drm file for the ioctl call 3432 * 3433 * Lookup the FB given its ID and return info about it. 3434 * 3435 * Called by the user via ioctl. 3436 * 3437 * Returns: 3438 * Zero on success, negative errno on failure. 3439 */ 3440 int drm_mode_getfb(struct drm_device *dev, 3441 void *data, struct drm_file *file_priv) 3442 { 3443 struct drm_mode_fb_cmd *r = data; 3444 struct drm_framebuffer *fb; 3445 int ret; 3446 3447 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3448 return -EINVAL; 3449 3450 fb = drm_framebuffer_lookup(dev, r->fb_id); 3451 if (!fb) 3452 return -ENOENT; 3453 3454 r->height = fb->height; 3455 r->width = fb->width; 3456 r->depth = fb->depth; 3457 r->bpp = fb->bits_per_pixel; 3458 r->pitch = fb->pitches[0]; 3459 if (fb->funcs->create_handle) { 3460 if (file_priv->is_master || capable(CAP_SYS_ADMIN) || 3461 drm_is_control_client(file_priv)) { 3462 ret = fb->funcs->create_handle(fb, file_priv, 3463 &r->handle); 3464 } else { 3465 /* GET_FB() is an unprivileged ioctl so we must not 3466 * return a buffer-handle to non-master processes! For 3467 * backwards-compatibility reasons, we cannot make 3468 * GET_FB() privileged, so just return an invalid handle 3469 * for non-masters. */ 3470 r->handle = 0; 3471 ret = 0; 3472 } 3473 } else { 3474 ret = -ENODEV; 3475 } 3476 3477 drm_framebuffer_unreference(fb); 3478 3479 return ret; 3480 } 3481 3482 /** 3483 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3484 * @dev: drm device for the ioctl 3485 * @data: data pointer for the ioctl 3486 * @file_priv: drm file for the ioctl call 3487 * 3488 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3489 * rectangle list. Generic userspace which does frontbuffer rendering must call 3490 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3491 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3492 * 3493 * Modesetting drivers which always update the frontbuffer do not need to 3494 * implement the corresponding ->dirty framebuffer callback. 3495 * 3496 * Called by the user via ioctl. 3497 * 3498 * Returns: 3499 * Zero on success, negative errno on failure. 3500 */ 3501 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3502 void *data, struct drm_file *file_priv) 3503 { 3504 struct drm_clip_rect __user *clips_ptr; 3505 struct drm_clip_rect *clips = NULL; 3506 struct drm_mode_fb_dirty_cmd *r = data; 3507 struct drm_framebuffer *fb; 3508 unsigned flags; 3509 int num_clips; 3510 int ret; 3511 3512 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3513 return -EINVAL; 3514 3515 fb = drm_framebuffer_lookup(dev, r->fb_id); 3516 if (!fb) 3517 return -ENOENT; 3518 3519 num_clips = r->num_clips; 3520 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3521 3522 if (!num_clips != !clips_ptr) { 3523 ret = -EINVAL; 3524 goto out_err1; 3525 } 3526 3527 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3528 3529 /* If userspace annotates copy, clips must come in pairs */ 3530 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3531 ret = -EINVAL; 3532 goto out_err1; 3533 } 3534 3535 if (num_clips && clips_ptr) { 3536 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3537 ret = -EINVAL; 3538 goto out_err1; 3539 } 3540 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); 3541 if (!clips) { 3542 ret = -ENOMEM; 3543 goto out_err1; 3544 } 3545 3546 ret = copy_from_user(clips, clips_ptr, 3547 num_clips * sizeof(*clips)); 3548 if (ret) { 3549 ret = -EFAULT; 3550 goto out_err2; 3551 } 3552 } 3553 3554 if (fb->funcs->dirty) { 3555 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3556 clips, num_clips); 3557 } else { 3558 ret = -ENOSYS; 3559 } 3560 3561 out_err2: 3562 kfree(clips); 3563 out_err1: 3564 drm_framebuffer_unreference(fb); 3565 3566 return ret; 3567 } 3568 3569 /** 3570 * drm_fb_release - remove and free the FBs on this file 3571 * @priv: drm file for the ioctl 3572 * 3573 * Destroy all the FBs associated with @filp. 3574 * 3575 * Called by the user via ioctl. 3576 * 3577 * Returns: 3578 * Zero on success, negative errno on failure. 3579 */ 3580 void drm_fb_release(struct drm_file *priv) 3581 { 3582 struct drm_framebuffer *fb, *tfb; 3583 struct drm_mode_rmfb_work arg; 3584 3585 INIT_LIST_HEAD(&arg.fbs); 3586 3587 /* 3588 * When the file gets released that means no one else can access the fb 3589 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3590 * avoid upsetting lockdep since the universal cursor code adds a 3591 * framebuffer while holding mutex locks. 3592 * 3593 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3594 * locks is impossible here since no one else but this function can get 3595 * at it any more. 3596 */ 3597 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3598 if (!kref_exclusive_p(&fb->refcount)) { 3599 list_move_tail(&fb->filp_head, &arg.fbs); 3600 } else { 3601 list_del_init(&fb->filp_head); 3602 3603 /* This drops the fpriv->fbs reference. */ 3604 drm_framebuffer_unreference(fb); 3605 } 3606 } 3607 3608 if (!list_empty(&arg.fbs)) { 3609 INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); 3610 3611 schedule_work(&arg.work); 3612 flush_work(&arg.work); 3613 destroy_work_on_stack(&arg.work); 3614 } 3615 } 3616 3617 /** 3618 * drm_property_create - create a new property type 3619 * @dev: drm device 3620 * @flags: flags specifying the property type 3621 * @name: name of the property 3622 * @num_values: number of pre-defined values 3623 * 3624 * This creates a new generic drm property which can then be attached to a drm 3625 * object with drm_object_attach_property. The returned property object must be 3626 * freed with drm_property_destroy. 3627 * 3628 * Note that the DRM core keeps a per-device list of properties and that, if 3629 * drm_mode_config_cleanup() is called, it will destroy all properties created 3630 * by the driver. 3631 * 3632 * Returns: 3633 * A pointer to the newly created property on success, NULL on failure. 3634 */ 3635 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3636 const char *name, int num_values) 3637 { 3638 struct drm_property *property = NULL; 3639 int ret; 3640 3641 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3642 if (!property) 3643 return NULL; 3644 3645 property->dev = dev; 3646 3647 if (num_values) { 3648 property->values = kcalloc(num_values, sizeof(uint64_t), 3649 GFP_KERNEL); 3650 if (!property->values) 3651 goto fail; 3652 } 3653 3654 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3655 if (ret) 3656 goto fail; 3657 3658 property->flags = flags; 3659 property->num_values = num_values; 3660 INIT_LIST_HEAD(&property->enum_list); 3661 3662 if (name) { 3663 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3664 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3665 } 3666 3667 list_add_tail(&property->head, &dev->mode_config.property_list); 3668 3669 WARN_ON(!drm_property_type_valid(property)); 3670 3671 return property; 3672 fail: 3673 kfree(property->values); 3674 kfree(property); 3675 return NULL; 3676 } 3677 EXPORT_SYMBOL(drm_property_create); 3678 3679 /** 3680 * drm_property_create_enum - create a new enumeration property type 3681 * @dev: drm device 3682 * @flags: flags specifying the property type 3683 * @name: name of the property 3684 * @props: enumeration lists with property values 3685 * @num_values: number of pre-defined values 3686 * 3687 * This creates a new generic drm property which can then be attached to a drm 3688 * object with drm_object_attach_property. The returned property object must be 3689 * freed with drm_property_destroy. 3690 * 3691 * Userspace is only allowed to set one of the predefined values for enumeration 3692 * properties. 3693 * 3694 * Returns: 3695 * A pointer to the newly created property on success, NULL on failure. 3696 */ 3697 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3698 const char *name, 3699 const struct drm_prop_enum_list *props, 3700 int num_values) 3701 { 3702 struct drm_property *property; 3703 int i, ret; 3704 3705 flags |= DRM_MODE_PROP_ENUM; 3706 3707 property = drm_property_create(dev, flags, name, num_values); 3708 if (!property) 3709 return NULL; 3710 3711 for (i = 0; i < num_values; i++) { 3712 ret = drm_property_add_enum(property, i, 3713 props[i].type, 3714 props[i].name); 3715 if (ret) { 3716 drm_property_destroy(dev, property); 3717 return NULL; 3718 } 3719 } 3720 3721 return property; 3722 } 3723 EXPORT_SYMBOL(drm_property_create_enum); 3724 3725 /** 3726 * drm_property_create_bitmask - create a new bitmask property type 3727 * @dev: drm device 3728 * @flags: flags specifying the property type 3729 * @name: name of the property 3730 * @props: enumeration lists with property bitflags 3731 * @num_props: size of the @props array 3732 * @supported_bits: bitmask of all supported enumeration values 3733 * 3734 * This creates a new bitmask drm property which can then be attached to a drm 3735 * object with drm_object_attach_property. The returned property object must be 3736 * freed with drm_property_destroy. 3737 * 3738 * Compared to plain enumeration properties userspace is allowed to set any 3739 * or'ed together combination of the predefined property bitflag values 3740 * 3741 * Returns: 3742 * A pointer to the newly created property on success, NULL on failure. 3743 */ 3744 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3745 int flags, const char *name, 3746 const struct drm_prop_enum_list *props, 3747 int num_props, 3748 uint64_t supported_bits) 3749 { 3750 struct drm_property *property; 3751 int i, ret, index = 0; 3752 int num_values = hweight64(supported_bits); 3753 3754 flags |= DRM_MODE_PROP_BITMASK; 3755 3756 property = drm_property_create(dev, flags, name, num_values); 3757 if (!property) 3758 return NULL; 3759 for (i = 0; i < num_props; i++) { 3760 if (!(supported_bits & (1ULL << props[i].type))) 3761 continue; 3762 3763 if (WARN_ON(index >= num_values)) { 3764 drm_property_destroy(dev, property); 3765 return NULL; 3766 } 3767 3768 ret = drm_property_add_enum(property, index++, 3769 props[i].type, 3770 props[i].name); 3771 if (ret) { 3772 drm_property_destroy(dev, property); 3773 return NULL; 3774 } 3775 } 3776 3777 return property; 3778 } 3779 EXPORT_SYMBOL(drm_property_create_bitmask); 3780 3781 static struct drm_property *property_create_range(struct drm_device *dev, 3782 int flags, const char *name, 3783 uint64_t min, uint64_t max) 3784 { 3785 struct drm_property *property; 3786 3787 property = drm_property_create(dev, flags, name, 2); 3788 if (!property) 3789 return NULL; 3790 3791 property->values[0] = min; 3792 property->values[1] = max; 3793 3794 return property; 3795 } 3796 3797 /** 3798 * drm_property_create_range - create a new unsigned ranged property type 3799 * @dev: drm device 3800 * @flags: flags specifying the property type 3801 * @name: name of the property 3802 * @min: minimum value of the property 3803 * @max: maximum value of the property 3804 * 3805 * This creates a new generic drm property which can then be attached to a drm 3806 * object with drm_object_attach_property. The returned property object must be 3807 * freed with drm_property_destroy. 3808 * 3809 * Userspace is allowed to set any unsigned integer value in the (min, max) 3810 * range inclusive. 3811 * 3812 * Returns: 3813 * A pointer to the newly created property on success, NULL on failure. 3814 */ 3815 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3816 const char *name, 3817 uint64_t min, uint64_t max) 3818 { 3819 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3820 name, min, max); 3821 } 3822 EXPORT_SYMBOL(drm_property_create_range); 3823 3824 /** 3825 * drm_property_create_signed_range - create a new signed ranged property type 3826 * @dev: drm device 3827 * @flags: flags specifying the property type 3828 * @name: name of the property 3829 * @min: minimum value of the property 3830 * @max: maximum value of the property 3831 * 3832 * This creates a new generic drm property which can then be attached to a drm 3833 * object with drm_object_attach_property. The returned property object must be 3834 * freed with drm_property_destroy. 3835 * 3836 * Userspace is allowed to set any signed integer value in the (min, max) 3837 * range inclusive. 3838 * 3839 * Returns: 3840 * A pointer to the newly created property on success, NULL on failure. 3841 */ 3842 struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3843 int flags, const char *name, 3844 int64_t min, int64_t max) 3845 { 3846 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3847 name, I642U64(min), I642U64(max)); 3848 } 3849 EXPORT_SYMBOL(drm_property_create_signed_range); 3850 3851 /** 3852 * drm_property_create_object - create a new object property type 3853 * @dev: drm device 3854 * @flags: flags specifying the property type 3855 * @name: name of the property 3856 * @type: object type from DRM_MODE_OBJECT_* defines 3857 * 3858 * This creates a new generic drm property which can then be attached to a drm 3859 * object with drm_object_attach_property. The returned property object must be 3860 * freed with drm_property_destroy. 3861 * 3862 * Userspace is only allowed to set this to any property value of the given 3863 * @type. Only useful for atomic properties, which is enforced. 3864 * 3865 * Returns: 3866 * A pointer to the newly created property on success, NULL on failure. 3867 */ 3868 struct drm_property *drm_property_create_object(struct drm_device *dev, 3869 int flags, const char *name, uint32_t type) 3870 { 3871 struct drm_property *property; 3872 3873 flags |= DRM_MODE_PROP_OBJECT; 3874 3875 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) 3876 return NULL; 3877 3878 property = drm_property_create(dev, flags, name, 1); 3879 if (!property) 3880 return NULL; 3881 3882 property->values[0] = type; 3883 3884 return property; 3885 } 3886 EXPORT_SYMBOL(drm_property_create_object); 3887 3888 /** 3889 * drm_property_create_bool - create a new boolean property type 3890 * @dev: drm device 3891 * @flags: flags specifying the property type 3892 * @name: name of the property 3893 * 3894 * This creates a new generic drm property which can then be attached to a drm 3895 * object with drm_object_attach_property. The returned property object must be 3896 * freed with drm_property_destroy. 3897 * 3898 * This is implemented as a ranged property with only {0, 1} as valid values. 3899 * 3900 * Returns: 3901 * A pointer to the newly created property on success, NULL on failure. 3902 */ 3903 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, 3904 const char *name) 3905 { 3906 return drm_property_create_range(dev, flags, name, 0, 1); 3907 } 3908 EXPORT_SYMBOL(drm_property_create_bool); 3909 3910 /** 3911 * drm_property_add_enum - add a possible value to an enumeration property 3912 * @property: enumeration property to change 3913 * @index: index of the new enumeration 3914 * @value: value of the new enumeration 3915 * @name: symbolic name of the new enumeration 3916 * 3917 * This functions adds enumerations to a property. 3918 * 3919 * It's use is deprecated, drivers should use one of the more specific helpers 3920 * to directly create the property with all enumerations already attached. 3921 * 3922 * Returns: 3923 * Zero on success, error code on failure. 3924 */ 3925 int drm_property_add_enum(struct drm_property *property, int index, 3926 uint64_t value, const char *name) 3927 { 3928 struct drm_property_enum *prop_enum; 3929 3930 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3931 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3932 return -EINVAL; 3933 3934 /* 3935 * Bitmask enum properties have the additional constraint of values 3936 * from 0 to 63 3937 */ 3938 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3939 (value > 63)) 3940 return -EINVAL; 3941 3942 if (!list_empty(&property->enum_list)) { 3943 list_for_each_entry(prop_enum, &property->enum_list, head) { 3944 if (prop_enum->value == value) { 3945 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3946 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3947 return 0; 3948 } 3949 } 3950 } 3951 3952 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3953 if (!prop_enum) 3954 return -ENOMEM; 3955 3956 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3957 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3958 prop_enum->value = value; 3959 3960 property->values[index] = value; 3961 list_add_tail(&prop_enum->head, &property->enum_list); 3962 return 0; 3963 } 3964 EXPORT_SYMBOL(drm_property_add_enum); 3965 3966 /** 3967 * drm_property_destroy - destroy a drm property 3968 * @dev: drm device 3969 * @property: property to destry 3970 * 3971 * This function frees a property including any attached resources like 3972 * enumeration values. 3973 */ 3974 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 3975 { 3976 struct drm_property_enum *prop_enum, *pt; 3977 3978 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 3979 list_del(&prop_enum->head); 3980 kfree(prop_enum); 3981 } 3982 3983 if (property->num_values) 3984 kfree(property->values); 3985 drm_mode_object_put(dev, &property->base); 3986 list_del(&property->head); 3987 kfree(property); 3988 } 3989 EXPORT_SYMBOL(drm_property_destroy); 3990 3991 /** 3992 * drm_object_attach_property - attach a property to a modeset object 3993 * @obj: drm modeset object 3994 * @property: property to attach 3995 * @init_val: initial value of the property 3996 * 3997 * This attaches the given property to the modeset object with the given initial 3998 * value. Currently this function cannot fail since the properties are stored in 3999 * a statically sized array. 4000 */ 4001 void drm_object_attach_property(struct drm_mode_object *obj, 4002 struct drm_property *property, 4003 uint64_t init_val) 4004 { 4005 int count = obj->properties->count; 4006 4007 if (count == DRM_OBJECT_MAX_PROPERTY) { 4008 WARN(1, "Failed to attach object property (type: 0x%x). Please " 4009 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 4010 "you see this message on the same object type.\n", 4011 obj->type); 4012 return; 4013 } 4014 4015 obj->properties->properties[count] = property; 4016 obj->properties->values[count] = init_val; 4017 obj->properties->count++; 4018 if (property->flags & DRM_MODE_PROP_ATOMIC) 4019 obj->properties->atomic_count++; 4020 } 4021 EXPORT_SYMBOL(drm_object_attach_property); 4022 4023 /** 4024 * drm_object_property_set_value - set the value of a property 4025 * @obj: drm mode object to set property value for 4026 * @property: property to set 4027 * @val: value the property should be set to 4028 * 4029 * This functions sets a given property on a given object. This function only 4030 * changes the software state of the property, it does not call into the 4031 * driver's ->set_property callback. 4032 * 4033 * Returns: 4034 * Zero on success, error code on failure. 4035 */ 4036 int drm_object_property_set_value(struct drm_mode_object *obj, 4037 struct drm_property *property, uint64_t val) 4038 { 4039 int i; 4040 4041 for (i = 0; i < obj->properties->count; i++) { 4042 if (obj->properties->properties[i] == property) { 4043 obj->properties->values[i] = val; 4044 return 0; 4045 } 4046 } 4047 4048 return -EINVAL; 4049 } 4050 EXPORT_SYMBOL(drm_object_property_set_value); 4051 4052 /** 4053 * drm_object_property_get_value - retrieve the value of a property 4054 * @obj: drm mode object to get property value from 4055 * @property: property to retrieve 4056 * @val: storage for the property value 4057 * 4058 * This function retrieves the softare state of the given property for the given 4059 * property. Since there is no driver callback to retrieve the current property 4060 * value this might be out of sync with the hardware, depending upon the driver 4061 * and property. 4062 * 4063 * Returns: 4064 * Zero on success, error code on failure. 4065 */ 4066 int drm_object_property_get_value(struct drm_mode_object *obj, 4067 struct drm_property *property, uint64_t *val) 4068 { 4069 int i; 4070 4071 /* read-only properties bypass atomic mechanism and still store 4072 * their value in obj->properties->values[].. mostly to avoid 4073 * having to deal w/ EDID and similar props in atomic paths: 4074 */ 4075 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && 4076 !(property->flags & DRM_MODE_PROP_IMMUTABLE)) 4077 return drm_atomic_get_property(obj, property, val); 4078 4079 for (i = 0; i < obj->properties->count; i++) { 4080 if (obj->properties->properties[i] == property) { 4081 *val = obj->properties->values[i]; 4082 return 0; 4083 } 4084 } 4085 4086 return -EINVAL; 4087 } 4088 EXPORT_SYMBOL(drm_object_property_get_value); 4089 4090 /** 4091 * drm_mode_getproperty_ioctl - get the property metadata 4092 * @dev: DRM device 4093 * @data: ioctl data 4094 * @file_priv: DRM file info 4095 * 4096 * This function retrieves the metadata for a given property, like the different 4097 * possible values for an enum property or the limits for a range property. 4098 * 4099 * Blob properties are special 4100 * 4101 * Called by the user via ioctl. 4102 * 4103 * Returns: 4104 * Zero on success, negative errno on failure. 4105 */ 4106 int drm_mode_getproperty_ioctl(struct drm_device *dev, 4107 void *data, struct drm_file *file_priv) 4108 { 4109 struct drm_mode_get_property *out_resp = data; 4110 struct drm_property *property; 4111 int enum_count = 0; 4112 int value_count = 0; 4113 int ret = 0, i; 4114 int copied; 4115 struct drm_property_enum *prop_enum; 4116 struct drm_mode_property_enum __user *enum_ptr; 4117 uint64_t __user *values_ptr; 4118 4119 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4120 return -EINVAL; 4121 4122 drm_modeset_lock_all(dev); 4123 property = drm_property_find(dev, out_resp->prop_id); 4124 if (!property) { 4125 ret = -ENOENT; 4126 goto done; 4127 } 4128 4129 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4130 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4131 list_for_each_entry(prop_enum, &property->enum_list, head) 4132 enum_count++; 4133 } 4134 4135 value_count = property->num_values; 4136 4137 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 4138 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 4139 out_resp->flags = property->flags; 4140 4141 if ((out_resp->count_values >= value_count) && value_count) { 4142 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 4143 for (i = 0; i < value_count; i++) { 4144 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 4145 ret = -EFAULT; 4146 goto done; 4147 } 4148 } 4149 } 4150 out_resp->count_values = value_count; 4151 4152 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4153 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4154 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 4155 copied = 0; 4156 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 4157 list_for_each_entry(prop_enum, &property->enum_list, head) { 4158 4159 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 4160 ret = -EFAULT; 4161 goto done; 4162 } 4163 4164 if (copy_to_user(&enum_ptr[copied].name, 4165 &prop_enum->name, DRM_PROP_NAME_LEN)) { 4166 ret = -EFAULT; 4167 goto done; 4168 } 4169 copied++; 4170 } 4171 } 4172 out_resp->count_enum_blobs = enum_count; 4173 } 4174 4175 /* 4176 * NOTE: The idea seems to have been to use this to read all the blob 4177 * property values. But nothing ever added them to the corresponding 4178 * list, userspace always used the special-purpose get_blob ioctl to 4179 * read the value for a blob property. It also doesn't make a lot of 4180 * sense to return values here when everything else is just metadata for 4181 * the property itself. 4182 */ 4183 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4184 out_resp->count_enum_blobs = 0; 4185 done: 4186 drm_modeset_unlock_all(dev); 4187 return ret; 4188 } 4189 4190 /** 4191 * drm_property_create_blob - Create new blob property 4192 * 4193 * Creates a new blob property for a specified DRM device, optionally 4194 * copying data. 4195 * 4196 * @dev: DRM device to create property for 4197 * @length: Length to allocate for blob data 4198 * @data: If specified, copies data into blob 4199 * 4200 * Returns: 4201 * New blob property with a single reference on success, or an ERR_PTR 4202 * value on failure. 4203 */ 4204 struct drm_property_blob * 4205 drm_property_create_blob(struct drm_device *dev, size_t length, 4206 const void *data) 4207 { 4208 struct drm_property_blob *blob; 4209 int ret; 4210 4211 if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob)) 4212 return ERR_PTR(-EINVAL); 4213 4214 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4215 if (!blob) 4216 return ERR_PTR(-ENOMEM); 4217 4218 /* This must be explicitly initialised, so we can safely call list_del 4219 * on it in the removal handler, even if it isn't in a file list. */ 4220 INIT_LIST_HEAD(&blob->head_file); 4221 blob->length = length; 4222 blob->dev = dev; 4223 4224 if (data) 4225 memcpy(blob->data, data, length); 4226 4227 mutex_lock(&dev->mode_config.blob_lock); 4228 4229 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 4230 if (ret) { 4231 kfree(blob); 4232 mutex_unlock(&dev->mode_config.blob_lock); 4233 return ERR_PTR(-EINVAL); 4234 } 4235 4236 kref_init(&blob->refcount); 4237 4238 list_add_tail(&blob->head_global, 4239 &dev->mode_config.property_blob_list); 4240 4241 mutex_unlock(&dev->mode_config.blob_lock); 4242 4243 return blob; 4244 } 4245 EXPORT_SYMBOL(drm_property_create_blob); 4246 4247 /** 4248 * drm_property_free_blob - Blob property destructor 4249 * 4250 * Internal free function for blob properties; must not be used directly. 4251 * 4252 * @kref: Reference 4253 */ 4254 static void drm_property_free_blob(struct kref *kref) 4255 { 4256 struct drm_property_blob *blob = 4257 container_of(kref, struct drm_property_blob, refcount); 4258 4259 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock)); 4260 4261 list_del(&blob->head_global); 4262 list_del(&blob->head_file); 4263 drm_mode_object_put(blob->dev, &blob->base); 4264 4265 kfree(blob); 4266 } 4267 4268 /** 4269 * drm_property_unreference_blob - Unreference a blob property 4270 * 4271 * Drop a reference on a blob property. May free the object. 4272 * 4273 * @blob: Pointer to blob property 4274 */ 4275 void drm_property_unreference_blob(struct drm_property_blob *blob) 4276 { 4277 struct drm_device *dev; 4278 4279 if (!blob) 4280 return; 4281 4282 dev = blob->dev; 4283 4284 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, blob->refcount.kr_count); 4285 4286 if (kref_put_mutex(&blob->refcount, drm_property_free_blob, 4287 &dev->mode_config.blob_lock)) 4288 mutex_unlock(&dev->mode_config.blob_lock); 4289 else 4290 might_lock(&dev->mode_config.blob_lock); 4291 } 4292 EXPORT_SYMBOL(drm_property_unreference_blob); 4293 4294 /** 4295 * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held 4296 * 4297 * Drop a reference on a blob property. May free the object. This must be 4298 * called with blob_lock held. 4299 * 4300 * @blob: Pointer to blob property 4301 */ 4302 static void drm_property_unreference_blob_locked(struct drm_property_blob *blob) 4303 { 4304 if (!blob) 4305 return; 4306 4307 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, blob->refcount.kr_count); 4308 4309 kref_put(&blob->refcount, drm_property_free_blob); 4310 } 4311 4312 /** 4313 * drm_property_destroy_user_blobs - destroy all blobs created by this client 4314 * @dev: DRM device 4315 * @file_priv: destroy all blobs owned by this file handle 4316 */ 4317 void drm_property_destroy_user_blobs(struct drm_device *dev, 4318 struct drm_file *file_priv) 4319 { 4320 struct drm_property_blob *blob, *bt; 4321 4322 mutex_lock(&dev->mode_config.blob_lock); 4323 4324 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) { 4325 list_del_init(&blob->head_file); 4326 drm_property_unreference_blob_locked(blob); 4327 } 4328 4329 mutex_unlock(&dev->mode_config.blob_lock); 4330 } 4331 4332 /** 4333 * drm_property_reference_blob - Take a reference on an existing property 4334 * 4335 * Take a new reference on an existing blob property. 4336 * 4337 * @blob: Pointer to blob property 4338 */ 4339 struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob) 4340 { 4341 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, blob->refcount.kr_count); 4342 kref_get(&blob->refcount); 4343 return blob; 4344 } 4345 EXPORT_SYMBOL(drm_property_reference_blob); 4346 4347 /* 4348 * Like drm_property_lookup_blob, but does not return an additional reference. 4349 * Must be called with blob_lock held. 4350 */ 4351 static struct drm_property_blob *__drm_property_lookup_blob(struct drm_device *dev, 4352 uint32_t id) 4353 { 4354 struct drm_mode_object *obj = NULL; 4355 struct drm_property_blob *blob; 4356 4357 WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock)); 4358 4359 mutex_lock(&dev->mode_config.idr_mutex); 4360 obj = idr_find(&dev->mode_config.crtc_idr, id); 4361 if (!obj || (obj->type != DRM_MODE_OBJECT_BLOB) || (obj->id != id)) 4362 blob = NULL; 4363 else 4364 blob = obj_to_blob(obj); 4365 mutex_unlock(&dev->mode_config.idr_mutex); 4366 4367 return blob; 4368 } 4369 4370 /** 4371 * drm_property_lookup_blob - look up a blob property and take a reference 4372 * @dev: drm device 4373 * @id: id of the blob property 4374 * 4375 * If successful, this takes an additional reference to the blob property. 4376 * callers need to make sure to eventually unreference the returned property 4377 * again, using @drm_property_unreference_blob. 4378 */ 4379 struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev, 4380 uint32_t id) 4381 { 4382 struct drm_property_blob *blob; 4383 4384 mutex_lock(&dev->mode_config.blob_lock); 4385 blob = __drm_property_lookup_blob(dev, id); 4386 if (blob) { 4387 if (!kref_get_unless_zero(&blob->refcount)) 4388 blob = NULL; 4389 } 4390 mutex_unlock(&dev->mode_config.blob_lock); 4391 4392 return blob; 4393 } 4394 EXPORT_SYMBOL(drm_property_lookup_blob); 4395 4396 /** 4397 * drm_property_replace_global_blob - atomically replace existing blob property 4398 * @dev: drm device 4399 * @replace: location of blob property pointer to be replaced 4400 * @length: length of data for new blob, or 0 for no data 4401 * @data: content for new blob, or NULL for no data 4402 * @obj_holds_id: optional object for property holding blob ID 4403 * @prop_holds_id: optional property holding blob ID 4404 * @return 0 on success or error on failure 4405 * 4406 * This function will atomically replace a global property in the blob list, 4407 * optionally updating a property which holds the ID of that property. It is 4408 * guaranteed to be atomic: no caller will be allowed to see intermediate 4409 * results, and either the entire operation will succeed and clean up the 4410 * previous property, or it will fail and the state will be unchanged. 4411 * 4412 * If length is 0 or data is NULL, no new blob will be created, and the holding 4413 * property, if specified, will be set to 0. 4414 * 4415 * Access to the replace pointer is assumed to be protected by the caller, e.g. 4416 * by holding the relevant modesetting object lock for its parent. 4417 * 4418 * For example, a drm_connector has a 'PATH' property, which contains the ID 4419 * of a blob property with the value of the MST path information. Calling this 4420 * function with replace pointing to the connector's path_blob_ptr, length and 4421 * data set for the new path information, obj_holds_id set to the connector's 4422 * base object, and prop_holds_id set to the path property name, will perform 4423 * a completely atomic update. The access to path_blob_ptr is protected by the 4424 * caller holding a lock on the connector. 4425 */ 4426 static int drm_property_replace_global_blob(struct drm_device *dev, 4427 struct drm_property_blob **replace, 4428 size_t length, 4429 const void *data, 4430 struct drm_mode_object *obj_holds_id, 4431 struct drm_property *prop_holds_id) 4432 { 4433 struct drm_property_blob *new_blob = NULL; 4434 struct drm_property_blob *old_blob = NULL; 4435 int ret; 4436 4437 WARN_ON(replace == NULL); 4438 4439 old_blob = *replace; 4440 4441 if (length && data) { 4442 new_blob = drm_property_create_blob(dev, length, data); 4443 if (IS_ERR(new_blob)) 4444 return PTR_ERR(new_blob); 4445 } 4446 4447 /* This does not need to be synchronised with blob_lock, as the 4448 * get_properties ioctl locks all modesetting objects, and 4449 * obj_holds_id must be locked before calling here, so we cannot 4450 * have its value out of sync with the list membership modified 4451 * below under blob_lock. */ 4452 if (obj_holds_id) { 4453 ret = drm_object_property_set_value(obj_holds_id, 4454 prop_holds_id, 4455 new_blob ? 4456 new_blob->base.id : 0); 4457 if (ret != 0) 4458 goto err_created; 4459 } 4460 4461 drm_property_unreference_blob(old_blob); 4462 *replace = new_blob; 4463 4464 return 0; 4465 4466 err_created: 4467 drm_property_unreference_blob(new_blob); 4468 return ret; 4469 } 4470 4471 /** 4472 * drm_mode_getblob_ioctl - get the contents of a blob property value 4473 * @dev: DRM device 4474 * @data: ioctl data 4475 * @file_priv: DRM file info 4476 * 4477 * This function retrieves the contents of a blob property. The value stored in 4478 * an object's blob property is just a normal modeset object id. 4479 * 4480 * Called by the user via ioctl. 4481 * 4482 * Returns: 4483 * Zero on success, negative errno on failure. 4484 */ 4485 int drm_mode_getblob_ioctl(struct drm_device *dev, 4486 void *data, struct drm_file *file_priv) 4487 { 4488 struct drm_mode_get_blob *out_resp = data; 4489 struct drm_property_blob *blob; 4490 int ret = 0; 4491 void __user *blob_ptr; 4492 4493 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4494 return -EINVAL; 4495 4496 drm_modeset_lock_all(dev); 4497 mutex_lock(&dev->mode_config.blob_lock); 4498 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4499 if (!blob) { 4500 ret = -ENOENT; 4501 goto done; 4502 } 4503 4504 if (out_resp->length == blob->length) { 4505 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4506 if (copy_to_user(blob_ptr, blob->data, blob->length)) { 4507 ret = -EFAULT; 4508 goto done; 4509 } 4510 } 4511 out_resp->length = blob->length; 4512 4513 done: 4514 mutex_unlock(&dev->mode_config.blob_lock); 4515 drm_modeset_unlock_all(dev); 4516 return ret; 4517 } 4518 4519 /** 4520 * drm_mode_createblob_ioctl - create a new blob property 4521 * @dev: DRM device 4522 * @data: ioctl data 4523 * @file_priv: DRM file info 4524 * 4525 * This function creates a new blob property with user-defined values. In order 4526 * to give us sensible validation and checking when creating, rather than at 4527 * every potential use, we also require a type to be provided upfront. 4528 * 4529 * Called by the user via ioctl. 4530 * 4531 * Returns: 4532 * Zero on success, negative errno on failure. 4533 */ 4534 int drm_mode_createblob_ioctl(struct drm_device *dev, 4535 void *data, struct drm_file *file_priv) 4536 { 4537 struct drm_mode_create_blob *out_resp = data; 4538 struct drm_property_blob *blob; 4539 void __user *blob_ptr; 4540 int ret = 0; 4541 4542 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4543 return -EINVAL; 4544 4545 blob = drm_property_create_blob(dev, out_resp->length, NULL); 4546 if (IS_ERR(blob)) 4547 return PTR_ERR(blob); 4548 4549 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4550 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) { 4551 ret = -EFAULT; 4552 goto out_blob; 4553 } 4554 4555 /* Dropping the lock between create_blob and our access here is safe 4556 * as only the same file_priv can remove the blob; at this point, it is 4557 * not associated with any file_priv. */ 4558 mutex_lock(&dev->mode_config.blob_lock); 4559 out_resp->blob_id = blob->base.id; 4560 list_add_tail(&blob->head_file, &file_priv->blobs); 4561 mutex_unlock(&dev->mode_config.blob_lock); 4562 4563 return 0; 4564 4565 out_blob: 4566 drm_property_unreference_blob(blob); 4567 return ret; 4568 } 4569 4570 /** 4571 * drm_mode_destroyblob_ioctl - destroy a user blob property 4572 * @dev: DRM device 4573 * @data: ioctl data 4574 * @file_priv: DRM file info 4575 * 4576 * Destroy an existing user-defined blob property. 4577 * 4578 * Called by the user via ioctl. 4579 * 4580 * Returns: 4581 * Zero on success, negative errno on failure. 4582 */ 4583 int drm_mode_destroyblob_ioctl(struct drm_device *dev, 4584 void *data, struct drm_file *file_priv) 4585 { 4586 struct drm_mode_destroy_blob *out_resp = data; 4587 struct drm_property_blob *blob = NULL, *bt; 4588 bool found = false; 4589 int ret = 0; 4590 4591 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4592 return -EINVAL; 4593 4594 mutex_lock(&dev->mode_config.blob_lock); 4595 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4596 if (!blob) { 4597 ret = -ENOENT; 4598 goto err; 4599 } 4600 4601 /* Ensure the property was actually created by this user. */ 4602 list_for_each_entry(bt, &file_priv->blobs, head_file) { 4603 if (bt == blob) { 4604 found = true; 4605 break; 4606 } 4607 } 4608 4609 if (!found) { 4610 ret = -EPERM; 4611 goto err; 4612 } 4613 4614 /* We must drop head_file here, because we may not be the last 4615 * reference on the blob. */ 4616 list_del_init(&blob->head_file); 4617 drm_property_unreference_blob_locked(blob); 4618 mutex_unlock(&dev->mode_config.blob_lock); 4619 4620 return 0; 4621 4622 err: 4623 mutex_unlock(&dev->mode_config.blob_lock); 4624 return ret; 4625 } 4626 4627 /** 4628 * drm_mode_connector_set_path_property - set tile property on connector 4629 * @connector: connector to set property on. 4630 * @path: path to use for property; must not be NULL. 4631 * 4632 * This creates a property to expose to userspace to specify a 4633 * connector path. This is mainly used for DisplayPort MST where 4634 * connectors have a topology and we want to allow userspace to give 4635 * them more meaningful names. 4636 * 4637 * Returns: 4638 * Zero on success, negative errno on failure. 4639 */ 4640 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4641 const char *path) 4642 { 4643 struct drm_device *dev = connector->dev; 4644 int ret; 4645 4646 ret = drm_property_replace_global_blob(dev, 4647 &connector->path_blob_ptr, 4648 strlen(path) + 1, 4649 path, 4650 &connector->base, 4651 dev->mode_config.path_property); 4652 return ret; 4653 } 4654 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4655 4656 /** 4657 * drm_mode_connector_set_tile_property - set tile property on connector 4658 * @connector: connector to set property on. 4659 * 4660 * This looks up the tile information for a connector, and creates a 4661 * property for userspace to parse if it exists. The property is of 4662 * the form of 8 integers using ':' as a separator. 4663 * 4664 * Returns: 4665 * Zero on success, errno on failure. 4666 */ 4667 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4668 { 4669 struct drm_device *dev = connector->dev; 4670 char tile[256]; 4671 int ret; 4672 4673 if (!connector->has_tile) { 4674 ret = drm_property_replace_global_blob(dev, 4675 &connector->tile_blob_ptr, 4676 0, 4677 NULL, 4678 &connector->base, 4679 dev->mode_config.tile_property); 4680 return ret; 4681 } 4682 4683 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4684 connector->tile_group->id, connector->tile_is_single_monitor, 4685 connector->num_h_tile, connector->num_v_tile, 4686 connector->tile_h_loc, connector->tile_v_loc, 4687 connector->tile_h_size, connector->tile_v_size); 4688 4689 ret = drm_property_replace_global_blob(dev, 4690 &connector->tile_blob_ptr, 4691 strlen(tile) + 1, 4692 tile, 4693 &connector->base, 4694 dev->mode_config.tile_property); 4695 return ret; 4696 } 4697 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4698 4699 /** 4700 * drm_mode_connector_update_edid_property - update the edid property of a connector 4701 * @connector: drm connector 4702 * @edid: new value of the edid property 4703 * 4704 * This function creates a new blob modeset object and assigns its id to the 4705 * connector's edid property. 4706 * 4707 * Returns: 4708 * Zero on success, negative errno on failure. 4709 */ 4710 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4711 const struct edid *edid) 4712 { 4713 struct drm_device *dev = connector->dev; 4714 size_t size = 0; 4715 int ret; 4716 4717 /* ignore requests to set edid when overridden */ 4718 if (connector->override_edid) 4719 return 0; 4720 4721 if (edid) 4722 size = EDID_LENGTH * (1 + edid->extensions); 4723 4724 ret = drm_property_replace_global_blob(dev, 4725 &connector->edid_blob_ptr, 4726 size, 4727 edid, 4728 &connector->base, 4729 dev->mode_config.edid_property); 4730 return ret; 4731 } 4732 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4733 4734 /* Some properties could refer to dynamic refcnt'd objects, or things that 4735 * need special locking to handle lifetime issues (ie. to ensure the prop 4736 * value doesn't become invalid part way through the property update due to 4737 * race). The value returned by reference via 'obj' should be passed back 4738 * to drm_property_change_valid_put() after the property is set (and the 4739 * object to which the property is attached has a chance to take it's own 4740 * reference). 4741 */ 4742 bool drm_property_change_valid_get(struct drm_property *property, 4743 uint64_t value, struct drm_mode_object **ref) 4744 { 4745 int i; 4746 4747 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4748 return false; 4749 4750 *ref = NULL; 4751 4752 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4753 if (value < property->values[0] || value > property->values[1]) 4754 return false; 4755 return true; 4756 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4757 int64_t svalue = U642I64(value); 4758 4759 if (svalue < U642I64(property->values[0]) || 4760 svalue > U642I64(property->values[1])) 4761 return false; 4762 return true; 4763 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4764 uint64_t valid_mask = 0; 4765 4766 for (i = 0; i < property->num_values; i++) 4767 valid_mask |= (1ULL << property->values[i]); 4768 return !(value & ~valid_mask); 4769 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4770 struct drm_property_blob *blob; 4771 4772 if (value == 0) 4773 return true; 4774 4775 blob = drm_property_lookup_blob(property->dev, value); 4776 if (blob) { 4777 *ref = &blob->base; 4778 return true; 4779 } else { 4780 return false; 4781 } 4782 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4783 /* a zero value for an object property translates to null: */ 4784 if (value == 0) 4785 return true; 4786 4787 /* handle refcnt'd objects specially: */ 4788 if (property->values[0] == DRM_MODE_OBJECT_FB) { 4789 struct drm_framebuffer *fb; 4790 fb = drm_framebuffer_lookup(property->dev, value); 4791 if (fb) { 4792 *ref = &fb->base; 4793 return true; 4794 } else { 4795 return false; 4796 } 4797 } else { 4798 return _object_find(property->dev, value, property->values[0]) != NULL; 4799 } 4800 } 4801 4802 for (i = 0; i < property->num_values; i++) 4803 if (property->values[i] == value) 4804 return true; 4805 return false; 4806 } 4807 4808 void drm_property_change_valid_put(struct drm_property *property, 4809 struct drm_mode_object *ref) 4810 { 4811 if (!ref) 4812 return; 4813 4814 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4815 if (property->values[0] == DRM_MODE_OBJECT_FB) 4816 drm_framebuffer_unreference(obj_to_fb(ref)); 4817 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4818 drm_property_unreference_blob(obj_to_blob(ref)); 4819 } 4820 4821 /** 4822 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4823 * @dev: DRM device 4824 * @data: ioctl data 4825 * @file_priv: DRM file info 4826 * 4827 * This function sets the current value for a connectors's property. It also 4828 * calls into a driver's ->set_property callback to update the hardware state 4829 * 4830 * Called by the user via ioctl. 4831 * 4832 * Returns: 4833 * Zero on success, negative errno on failure. 4834 */ 4835 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4836 void *data, struct drm_file *file_priv) 4837 { 4838 struct drm_mode_connector_set_property *conn_set_prop = data; 4839 struct drm_mode_obj_set_property obj_set_prop = { 4840 .value = conn_set_prop->value, 4841 .prop_id = conn_set_prop->prop_id, 4842 .obj_id = conn_set_prop->connector_id, 4843 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4844 }; 4845 4846 /* It does all the locking and checking we need */ 4847 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4848 } 4849 4850 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4851 struct drm_property *property, 4852 uint64_t value) 4853 { 4854 int ret = -EINVAL; 4855 struct drm_connector *connector = obj_to_connector(obj); 4856 4857 /* Do DPMS ourselves */ 4858 if (property == connector->dev->mode_config.dpms_property) { 4859 ret = 0; 4860 if (connector->funcs->dpms) 4861 ret = (*connector->funcs->dpms)(connector, (int)value); 4862 } else if (connector->funcs->set_property) 4863 ret = connector->funcs->set_property(connector, property, value); 4864 4865 /* store the property value if successful */ 4866 if (!ret) 4867 drm_object_property_set_value(&connector->base, property, value); 4868 return ret; 4869 } 4870 4871 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4872 struct drm_property *property, 4873 uint64_t value) 4874 { 4875 int ret = -EINVAL; 4876 struct drm_crtc *crtc = obj_to_crtc(obj); 4877 4878 if (crtc->funcs->set_property) 4879 ret = crtc->funcs->set_property(crtc, property, value); 4880 if (!ret) 4881 drm_object_property_set_value(obj, property, value); 4882 4883 return ret; 4884 } 4885 4886 /** 4887 * drm_mode_plane_set_obj_prop - set the value of a property 4888 * @plane: drm plane object to set property value for 4889 * @property: property to set 4890 * @value: value the property should be set to 4891 * 4892 * This functions sets a given property on a given plane object. This function 4893 * calls the driver's ->set_property callback and changes the software state of 4894 * the property if the callback succeeds. 4895 * 4896 * Returns: 4897 * Zero on success, error code on failure. 4898 */ 4899 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4900 struct drm_property *property, 4901 uint64_t value) 4902 { 4903 int ret = -EINVAL; 4904 struct drm_mode_object *obj = &plane->base; 4905 4906 if (plane->funcs->set_property) 4907 ret = plane->funcs->set_property(plane, property, value); 4908 if (!ret) 4909 drm_object_property_set_value(obj, property, value); 4910 4911 return ret; 4912 } 4913 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4914 4915 /** 4916 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 4917 * @dev: DRM device 4918 * @data: ioctl data 4919 * @file_priv: DRM file info 4920 * 4921 * This function retrieves the current value for an object's property. Compared 4922 * to the connector specific ioctl this one is extended to also work on crtc and 4923 * plane objects. 4924 * 4925 * Called by the user via ioctl. 4926 * 4927 * Returns: 4928 * Zero on success, negative errno on failure. 4929 */ 4930 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4931 struct drm_file *file_priv) 4932 { 4933 struct drm_mode_obj_get_properties *arg = data; 4934 struct drm_mode_object *obj; 4935 int ret = 0; 4936 4937 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4938 return -EINVAL; 4939 4940 drm_modeset_lock_all(dev); 4941 4942 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4943 if (!obj) { 4944 ret = -ENOENT; 4945 goto out; 4946 } 4947 if (!obj->properties) { 4948 ret = -EINVAL; 4949 goto out; 4950 } 4951 4952 ret = get_properties(obj, file_priv->atomic, 4953 (uint32_t __user *)(unsigned long)(arg->props_ptr), 4954 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), 4955 &arg->count_props); 4956 4957 out: 4958 drm_modeset_unlock_all(dev); 4959 return ret; 4960 } 4961 4962 /** 4963 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 4964 * @dev: DRM device 4965 * @data: ioctl data 4966 * @file_priv: DRM file info 4967 * 4968 * This function sets the current value for an object's property. It also calls 4969 * into a driver's ->set_property callback to update the hardware state. 4970 * Compared to the connector specific ioctl this one is extended to also work on 4971 * crtc and plane objects. 4972 * 4973 * Called by the user via ioctl. 4974 * 4975 * Returns: 4976 * Zero on success, negative errno on failure. 4977 */ 4978 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 4979 struct drm_file *file_priv) 4980 { 4981 struct drm_mode_obj_set_property *arg = data; 4982 struct drm_mode_object *arg_obj; 4983 struct drm_mode_object *prop_obj; 4984 struct drm_property *property; 4985 int i, ret = -EINVAL; 4986 struct drm_mode_object *ref; 4987 4988 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4989 return -EINVAL; 4990 4991 drm_modeset_lock_all(dev); 4992 4993 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4994 if (!arg_obj) { 4995 ret = -ENOENT; 4996 goto out; 4997 } 4998 if (!arg_obj->properties) 4999 goto out; 5000 5001 for (i = 0; i < arg_obj->properties->count; i++) 5002 if (arg_obj->properties->properties[i]->base.id == arg->prop_id) 5003 break; 5004 5005 if (i == arg_obj->properties->count) 5006 goto out; 5007 5008 prop_obj = drm_mode_object_find(dev, arg->prop_id, 5009 DRM_MODE_OBJECT_PROPERTY); 5010 if (!prop_obj) { 5011 ret = -ENOENT; 5012 goto out; 5013 } 5014 property = obj_to_property(prop_obj); 5015 5016 if (!drm_property_change_valid_get(property, arg->value, &ref)) 5017 goto out; 5018 5019 switch (arg_obj->type) { 5020 case DRM_MODE_OBJECT_CONNECTOR: 5021 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 5022 arg->value); 5023 break; 5024 case DRM_MODE_OBJECT_CRTC: 5025 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 5026 break; 5027 case DRM_MODE_OBJECT_PLANE: 5028 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 5029 property, arg->value); 5030 break; 5031 } 5032 5033 drm_property_change_valid_put(property, ref); 5034 5035 out: 5036 drm_modeset_unlock_all(dev); 5037 return ret; 5038 } 5039 5040 /** 5041 * drm_mode_connector_attach_encoder - attach a connector to an encoder 5042 * @connector: connector to attach 5043 * @encoder: encoder to attach @connector to 5044 * 5045 * This function links up a connector to an encoder. Note that the routing 5046 * restrictions between encoders and crtcs are exposed to userspace through the 5047 * possible_clones and possible_crtcs bitmasks. 5048 * 5049 * Returns: 5050 * Zero on success, negative errno on failure. 5051 */ 5052 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 5053 struct drm_encoder *encoder) 5054 { 5055 int i; 5056 5057 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 5058 if (connector->encoder_ids[i] == 0) { 5059 connector->encoder_ids[i] = encoder->base.id; 5060 return 0; 5061 } 5062 } 5063 return -ENOMEM; 5064 } 5065 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 5066 5067 /** 5068 * drm_mode_crtc_set_gamma_size - set the gamma table size 5069 * @crtc: CRTC to set the gamma table size for 5070 * @gamma_size: size of the gamma table 5071 * 5072 * Drivers which support gamma tables should set this to the supported gamma 5073 * table size when initializing the CRTC. Currently the drm core only supports a 5074 * fixed gamma table size. 5075 * 5076 * Returns: 5077 * Zero on success, negative errno on failure. 5078 */ 5079 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 5080 int gamma_size) 5081 { 5082 crtc->gamma_size = gamma_size; 5083 5084 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, 5085 GFP_KERNEL); 5086 if (!crtc->gamma_store) { 5087 crtc->gamma_size = 0; 5088 return -ENOMEM; 5089 } 5090 5091 return 0; 5092 } 5093 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 5094 5095 /** 5096 * drm_mode_gamma_set_ioctl - set the gamma table 5097 * @dev: DRM device 5098 * @data: ioctl data 5099 * @file_priv: DRM file info 5100 * 5101 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 5102 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 5103 * 5104 * Called by the user via ioctl. 5105 * 5106 * Returns: 5107 * Zero on success, negative errno on failure. 5108 */ 5109 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 5110 void *data, struct drm_file *file_priv) 5111 { 5112 struct drm_mode_crtc_lut *crtc_lut = data; 5113 struct drm_crtc *crtc; 5114 void *r_base, *g_base, *b_base; 5115 int size; 5116 int ret = 0; 5117 5118 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5119 return -EINVAL; 5120 5121 drm_modeset_lock_all(dev); 5122 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5123 if (!crtc) { 5124 ret = -ENOENT; 5125 goto out; 5126 } 5127 5128 if (crtc->funcs->gamma_set == NULL) { 5129 ret = -ENOSYS; 5130 goto out; 5131 } 5132 5133 /* memcpy into gamma store */ 5134 if (crtc_lut->gamma_size != crtc->gamma_size) { 5135 ret = -EINVAL; 5136 goto out; 5137 } 5138 5139 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5140 r_base = crtc->gamma_store; 5141 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 5142 ret = -EFAULT; 5143 goto out; 5144 } 5145 5146 g_base = r_base + size; 5147 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 5148 ret = -EFAULT; 5149 goto out; 5150 } 5151 5152 b_base = g_base + size; 5153 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 5154 ret = -EFAULT; 5155 goto out; 5156 } 5157 5158 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 5159 5160 out: 5161 drm_modeset_unlock_all(dev); 5162 return ret; 5163 5164 } 5165 5166 /** 5167 * drm_mode_gamma_get_ioctl - get the gamma table 5168 * @dev: DRM device 5169 * @data: ioctl data 5170 * @file_priv: DRM file info 5171 * 5172 * Copy the current gamma table into the storage provided. This also provides 5173 * the gamma table size the driver expects, which can be used to size the 5174 * allocated storage. 5175 * 5176 * Called by the user via ioctl. 5177 * 5178 * Returns: 5179 * Zero on success, negative errno on failure. 5180 */ 5181 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 5182 void *data, struct drm_file *file_priv) 5183 { 5184 struct drm_mode_crtc_lut *crtc_lut = data; 5185 struct drm_crtc *crtc; 5186 void *r_base, *g_base, *b_base; 5187 int size; 5188 int ret = 0; 5189 5190 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5191 return -EINVAL; 5192 5193 drm_modeset_lock_all(dev); 5194 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5195 if (!crtc) { 5196 ret = -ENOENT; 5197 goto out; 5198 } 5199 5200 /* memcpy into gamma store */ 5201 if (crtc_lut->gamma_size != crtc->gamma_size) { 5202 ret = -EINVAL; 5203 goto out; 5204 } 5205 5206 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5207 r_base = crtc->gamma_store; 5208 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 5209 ret = -EFAULT; 5210 goto out; 5211 } 5212 5213 g_base = r_base + size; 5214 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 5215 ret = -EFAULT; 5216 goto out; 5217 } 5218 5219 b_base = g_base + size; 5220 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 5221 ret = -EFAULT; 5222 goto out; 5223 } 5224 out: 5225 drm_modeset_unlock_all(dev); 5226 return ret; 5227 } 5228 5229 /** 5230 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 5231 * @dev: DRM device 5232 * @data: ioctl data 5233 * @file_priv: DRM file info 5234 * 5235 * This schedules an asynchronous update on a given CRTC, called page flip. 5236 * Optionally a drm event is generated to signal the completion of the event. 5237 * Generic drivers cannot assume that a pageflip with changed framebuffer 5238 * properties (including driver specific metadata like tiling layout) will work, 5239 * but some drivers support e.g. pixel format changes through the pageflip 5240 * ioctl. 5241 * 5242 * Called by the user via ioctl. 5243 * 5244 * Returns: 5245 * Zero on success, negative errno on failure. 5246 */ 5247 int drm_mode_page_flip_ioctl(struct drm_device *dev, 5248 void *data, struct drm_file *file_priv) 5249 { 5250 struct drm_mode_crtc_page_flip *page_flip = data; 5251 struct drm_crtc *crtc; 5252 struct drm_framebuffer *fb = NULL; 5253 struct drm_pending_vblank_event *e = NULL; 5254 unsigned long flags; 5255 int ret = -EINVAL; 5256 5257 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5258 return -EINVAL; 5259 5260 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 5261 page_flip->reserved != 0) 5262 return -EINVAL; 5263 5264 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 5265 return -EINVAL; 5266 5267 crtc = drm_crtc_find(dev, page_flip->crtc_id); 5268 if (!crtc) 5269 return -ENOENT; 5270 5271 drm_modeset_lock_crtc(crtc, crtc->primary); 5272 if (crtc->primary->fb == NULL) { 5273 /* The framebuffer is currently unbound, presumably 5274 * due to a hotplug event, that userspace has not 5275 * yet discovered. 5276 */ 5277 ret = -EBUSY; 5278 goto out; 5279 } 5280 5281 if (crtc->funcs->page_flip == NULL) 5282 goto out; 5283 5284 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 5285 if (!fb) { 5286 ret = -ENOENT; 5287 goto out; 5288 } 5289 5290 if (crtc->state) { 5291 const struct drm_plane_state *state = crtc->primary->state; 5292 5293 ret = check_src_coords(state->src_x, state->src_y, 5294 state->src_w, state->src_h, fb); 5295 } else { 5296 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 5297 } 5298 if (ret) 5299 goto out; 5300 5301 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 5302 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 5303 ret = -EINVAL; 5304 goto out; 5305 } 5306 5307 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5308 ret = -ENOMEM; 5309 spin_lock_irqsave(&dev->event_lock, flags); 5310 if (file_priv->event_space < sizeof(e->event)) { 5311 spin_unlock_irqrestore(&dev->event_lock, flags); 5312 goto out; 5313 } 5314 file_priv->event_space -= sizeof(e->event); 5315 spin_unlock_irqrestore(&dev->event_lock, flags); 5316 5317 e = kzalloc(sizeof(*e), GFP_KERNEL); 5318 if (e == NULL) { 5319 spin_lock_irqsave(&dev->event_lock, flags); 5320 file_priv->event_space += sizeof(e->event); 5321 spin_unlock_irqrestore(&dev->event_lock, flags); 5322 goto out; 5323 } 5324 5325 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 5326 e->event.base.length = sizeof(e->event); 5327 e->event.user_data = page_flip->user_data; 5328 e->base.event = &e->event.base; 5329 e->base.file_priv = file_priv; 5330 e->base.destroy = 5331 (void (*) (struct drm_pending_event *)) kfree; 5332 } 5333 5334 crtc->primary->old_fb = crtc->primary->fb; 5335 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 5336 if (ret) { 5337 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5338 spin_lock_irqsave(&dev->event_lock, flags); 5339 file_priv->event_space += sizeof(e->event); 5340 spin_unlock_irqrestore(&dev->event_lock, flags); 5341 kfree(e); 5342 } 5343 /* Keep the old fb, don't unref it. */ 5344 crtc->primary->old_fb = NULL; 5345 } else { 5346 crtc->primary->fb = fb; 5347 /* Unref only the old framebuffer. */ 5348 fb = NULL; 5349 } 5350 5351 out: 5352 if (fb) 5353 drm_framebuffer_unreference(fb); 5354 if (crtc->primary->old_fb) 5355 drm_framebuffer_unreference(crtc->primary->old_fb); 5356 crtc->primary->old_fb = NULL; 5357 drm_modeset_unlock_crtc(crtc); 5358 5359 return ret; 5360 } 5361 5362 /** 5363 * drm_mode_config_reset - call ->reset callbacks 5364 * @dev: drm device 5365 * 5366 * This functions calls all the crtc's, encoder's and connector's ->reset 5367 * callback. Drivers can use this in e.g. their driver load or resume code to 5368 * reset hardware and software state. 5369 */ 5370 void drm_mode_config_reset(struct drm_device *dev) 5371 { 5372 struct drm_crtc *crtc; 5373 struct drm_plane *plane; 5374 struct drm_encoder *encoder; 5375 struct drm_connector *connector; 5376 5377 drm_for_each_plane(plane, dev) 5378 if (plane->funcs->reset) 5379 plane->funcs->reset(plane); 5380 5381 drm_for_each_crtc(crtc, dev) 5382 if (crtc->funcs->reset) 5383 crtc->funcs->reset(crtc); 5384 5385 drm_for_each_encoder(encoder, dev) 5386 if (encoder->funcs->reset) 5387 encoder->funcs->reset(encoder); 5388 5389 mutex_lock(&dev->mode_config.mutex); 5390 drm_for_each_connector(connector, dev) 5391 if (connector->funcs->reset) 5392 connector->funcs->reset(connector); 5393 mutex_unlock(&dev->mode_config.mutex); 5394 } 5395 EXPORT_SYMBOL(drm_mode_config_reset); 5396 5397 /** 5398 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 5399 * @dev: DRM device 5400 * @data: ioctl data 5401 * @file_priv: DRM file info 5402 * 5403 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 5404 * TTM or something else entirely) and returns the resulting buffer handle. This 5405 * handle can then be wrapped up into a framebuffer modeset object. 5406 * 5407 * Note that userspace is not allowed to use such objects for render 5408 * acceleration - drivers must create their own private ioctls for such a use 5409 * case. 5410 * 5411 * Called by the user via ioctl. 5412 * 5413 * Returns: 5414 * Zero on success, negative errno on failure. 5415 */ 5416 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 5417 void *data, struct drm_file *file_priv) 5418 { 5419 struct drm_mode_create_dumb *args = data; 5420 u32 cpp, stride, size; 5421 5422 if (!dev->driver->dumb_create) 5423 return -ENOSYS; 5424 if (!args->width || !args->height || !args->bpp) 5425 return -EINVAL; 5426 5427 /* overflow checks for 32bit size calculations */ 5428 /* NOTE: DIV_ROUND_UP() can overflow */ 5429 cpp = DIV_ROUND_UP(args->bpp, 8); 5430 if (!cpp || cpp > 0xffffffffU / args->width) 5431 return -EINVAL; 5432 stride = cpp * args->width; 5433 if (args->height > 0xffffffffU / stride) 5434 return -EINVAL; 5435 5436 /* test for wrap-around */ 5437 size = args->height * stride; 5438 if (PAGE_ALIGN(size) == 0) 5439 return -EINVAL; 5440 5441 /* 5442 * handle, pitch and size are output parameters. Zero them out to 5443 * prevent drivers from accidentally using uninitialized data. Since 5444 * not all existing userspace is clearing these fields properly we 5445 * cannot reject IOCTL with garbage in them. 5446 */ 5447 args->handle = 0; 5448 args->pitch = 0; 5449 args->size = 0; 5450 5451 return dev->driver->dumb_create(file_priv, dev, args); 5452 } 5453 5454 /** 5455 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 5456 * @dev: DRM device 5457 * @data: ioctl data 5458 * @file_priv: DRM file info 5459 * 5460 * Allocate an offset in the drm device node's address space to be able to 5461 * memory map a dumb buffer. 5462 * 5463 * Called by the user via ioctl. 5464 * 5465 * Returns: 5466 * Zero on success, negative errno on failure. 5467 */ 5468 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 5469 void *data, struct drm_file *file_priv) 5470 { 5471 struct drm_mode_map_dumb *args = data; 5472 5473 /* call driver ioctl to get mmap offset */ 5474 if (!dev->driver->dumb_map_offset) 5475 return -ENOSYS; 5476 5477 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 5478 } 5479 5480 /** 5481 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 5482 * @dev: DRM device 5483 * @data: ioctl data 5484 * @file_priv: DRM file info 5485 * 5486 * This destroys the userspace handle for the given dumb backing storage buffer. 5487 * Since buffer objects must be reference counted in the kernel a buffer object 5488 * won't be immediately freed if a framebuffer modeset object still uses it. 5489 * 5490 * Called by the user via ioctl. 5491 * 5492 * Returns: 5493 * Zero on success, negative errno on failure. 5494 */ 5495 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 5496 void *data, struct drm_file *file_priv) 5497 { 5498 struct drm_mode_destroy_dumb *args = data; 5499 5500 if (!dev->driver->dumb_destroy) 5501 return -ENOSYS; 5502 5503 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 5504 } 5505 5506 /** 5507 * drm_fb_get_bpp_depth - get the bpp/depth values for format 5508 * @format: pixel format (DRM_FORMAT_*) 5509 * @depth: storage for the depth value 5510 * @bpp: storage for the bpp value 5511 * 5512 * This only supports RGB formats here for compat with code that doesn't use 5513 * pixel formats directly yet. 5514 */ 5515 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 5516 int *bpp) 5517 { 5518 switch (format) { 5519 case DRM_FORMAT_C8: 5520 case DRM_FORMAT_RGB332: 5521 case DRM_FORMAT_BGR233: 5522 *depth = 8; 5523 *bpp = 8; 5524 break; 5525 case DRM_FORMAT_XRGB1555: 5526 case DRM_FORMAT_XBGR1555: 5527 case DRM_FORMAT_RGBX5551: 5528 case DRM_FORMAT_BGRX5551: 5529 case DRM_FORMAT_ARGB1555: 5530 case DRM_FORMAT_ABGR1555: 5531 case DRM_FORMAT_RGBA5551: 5532 case DRM_FORMAT_BGRA5551: 5533 *depth = 15; 5534 *bpp = 16; 5535 break; 5536 case DRM_FORMAT_RGB565: 5537 case DRM_FORMAT_BGR565: 5538 *depth = 16; 5539 *bpp = 16; 5540 break; 5541 case DRM_FORMAT_RGB888: 5542 case DRM_FORMAT_BGR888: 5543 *depth = 24; 5544 *bpp = 24; 5545 break; 5546 case DRM_FORMAT_XRGB8888: 5547 case DRM_FORMAT_XBGR8888: 5548 case DRM_FORMAT_RGBX8888: 5549 case DRM_FORMAT_BGRX8888: 5550 *depth = 24; 5551 *bpp = 32; 5552 break; 5553 case DRM_FORMAT_XRGB2101010: 5554 case DRM_FORMAT_XBGR2101010: 5555 case DRM_FORMAT_RGBX1010102: 5556 case DRM_FORMAT_BGRX1010102: 5557 case DRM_FORMAT_ARGB2101010: 5558 case DRM_FORMAT_ABGR2101010: 5559 case DRM_FORMAT_RGBA1010102: 5560 case DRM_FORMAT_BGRA1010102: 5561 *depth = 30; 5562 *bpp = 32; 5563 break; 5564 case DRM_FORMAT_ARGB8888: 5565 case DRM_FORMAT_ABGR8888: 5566 case DRM_FORMAT_RGBA8888: 5567 case DRM_FORMAT_BGRA8888: 5568 *depth = 32; 5569 *bpp = 32; 5570 break; 5571 default: 5572 DRM_DEBUG_KMS("unsupported pixel format %s\n", 5573 drm_get_format_name(format)); 5574 *depth = 0; 5575 *bpp = 0; 5576 break; 5577 } 5578 } 5579 EXPORT_SYMBOL(drm_fb_get_bpp_depth); 5580 5581 /** 5582 * drm_format_num_planes - get the number of planes for format 5583 * @format: pixel format (DRM_FORMAT_*) 5584 * 5585 * Returns: 5586 * The number of planes used by the specified pixel format. 5587 */ 5588 int drm_format_num_planes(uint32_t format) 5589 { 5590 switch (format) { 5591 case DRM_FORMAT_YUV410: 5592 case DRM_FORMAT_YVU410: 5593 case DRM_FORMAT_YUV411: 5594 case DRM_FORMAT_YVU411: 5595 case DRM_FORMAT_YUV420: 5596 case DRM_FORMAT_YVU420: 5597 case DRM_FORMAT_YUV422: 5598 case DRM_FORMAT_YVU422: 5599 case DRM_FORMAT_YUV444: 5600 case DRM_FORMAT_YVU444: 5601 return 3; 5602 case DRM_FORMAT_NV12: 5603 case DRM_FORMAT_NV21: 5604 case DRM_FORMAT_NV16: 5605 case DRM_FORMAT_NV61: 5606 case DRM_FORMAT_NV24: 5607 case DRM_FORMAT_NV42: 5608 return 2; 5609 default: 5610 return 1; 5611 } 5612 } 5613 EXPORT_SYMBOL(drm_format_num_planes); 5614 5615 /** 5616 * drm_format_plane_cpp - determine the bytes per pixel value 5617 * @format: pixel format (DRM_FORMAT_*) 5618 * @plane: plane index 5619 * 5620 * Returns: 5621 * The bytes per pixel value for the specified plane. 5622 */ 5623 int drm_format_plane_cpp(uint32_t format, int plane) 5624 { 5625 unsigned int depth; 5626 int bpp; 5627 5628 if (plane >= drm_format_num_planes(format)) 5629 return 0; 5630 5631 switch (format) { 5632 case DRM_FORMAT_YUYV: 5633 case DRM_FORMAT_YVYU: 5634 case DRM_FORMAT_UYVY: 5635 case DRM_FORMAT_VYUY: 5636 return 2; 5637 case DRM_FORMAT_NV12: 5638 case DRM_FORMAT_NV21: 5639 case DRM_FORMAT_NV16: 5640 case DRM_FORMAT_NV61: 5641 case DRM_FORMAT_NV24: 5642 case DRM_FORMAT_NV42: 5643 return plane ? 2 : 1; 5644 case DRM_FORMAT_YUV410: 5645 case DRM_FORMAT_YVU410: 5646 case DRM_FORMAT_YUV411: 5647 case DRM_FORMAT_YVU411: 5648 case DRM_FORMAT_YUV420: 5649 case DRM_FORMAT_YVU420: 5650 case DRM_FORMAT_YUV422: 5651 case DRM_FORMAT_YVU422: 5652 case DRM_FORMAT_YUV444: 5653 case DRM_FORMAT_YVU444: 5654 return 1; 5655 default: 5656 drm_fb_get_bpp_depth(format, &depth, &bpp); 5657 return bpp >> 3; 5658 } 5659 } 5660 EXPORT_SYMBOL(drm_format_plane_cpp); 5661 5662 /** 5663 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 5664 * @format: pixel format (DRM_FORMAT_*) 5665 * 5666 * Returns: 5667 * The horizontal chroma subsampling factor for the 5668 * specified pixel format. 5669 */ 5670 int drm_format_horz_chroma_subsampling(uint32_t format) 5671 { 5672 switch (format) { 5673 case DRM_FORMAT_YUV411: 5674 case DRM_FORMAT_YVU411: 5675 case DRM_FORMAT_YUV410: 5676 case DRM_FORMAT_YVU410: 5677 return 4; 5678 case DRM_FORMAT_YUYV: 5679 case DRM_FORMAT_YVYU: 5680 case DRM_FORMAT_UYVY: 5681 case DRM_FORMAT_VYUY: 5682 case DRM_FORMAT_NV12: 5683 case DRM_FORMAT_NV21: 5684 case DRM_FORMAT_NV16: 5685 case DRM_FORMAT_NV61: 5686 case DRM_FORMAT_YUV422: 5687 case DRM_FORMAT_YVU422: 5688 case DRM_FORMAT_YUV420: 5689 case DRM_FORMAT_YVU420: 5690 return 2; 5691 default: 5692 return 1; 5693 } 5694 } 5695 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5696 5697 /** 5698 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5699 * @format: pixel format (DRM_FORMAT_*) 5700 * 5701 * Returns: 5702 * The vertical chroma subsampling factor for the 5703 * specified pixel format. 5704 */ 5705 int drm_format_vert_chroma_subsampling(uint32_t format) 5706 { 5707 switch (format) { 5708 case DRM_FORMAT_YUV410: 5709 case DRM_FORMAT_YVU410: 5710 return 4; 5711 case DRM_FORMAT_YUV420: 5712 case DRM_FORMAT_YVU420: 5713 case DRM_FORMAT_NV12: 5714 case DRM_FORMAT_NV21: 5715 return 2; 5716 default: 5717 return 1; 5718 } 5719 } 5720 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5721 5722 /** 5723 * drm_rotation_simplify() - Try to simplify the rotation 5724 * @rotation: Rotation to be simplified 5725 * @supported_rotations: Supported rotations 5726 * 5727 * Attempt to simplify the rotation to a form that is supported. 5728 * Eg. if the hardware supports everything except DRM_REFLECT_X 5729 * one could call this function like this: 5730 * 5731 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5732 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5733 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5734 * 5735 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5736 * transforms the hardware supports, this function may not 5737 * be able to produce a supported transform, so the caller should 5738 * check the result afterwards. 5739 */ 5740 unsigned int drm_rotation_simplify(unsigned int rotation, 5741 unsigned int supported_rotations) 5742 { 5743 if (rotation & ~supported_rotations) { 5744 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5745 rotation = (rotation & DRM_REFLECT_MASK) | 5746 BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4); 5747 } 5748 5749 return rotation; 5750 } 5751 EXPORT_SYMBOL(drm_rotation_simplify); 5752 5753 /** 5754 * drm_mode_config_init - initialize DRM mode_configuration structure 5755 * @dev: DRM device 5756 * 5757 * Initialize @dev's mode_config structure, used for tracking the graphics 5758 * configuration of @dev. 5759 * 5760 * Since this initializes the modeset locks, no locking is possible. Which is no 5761 * problem, since this should happen single threaded at init time. It is the 5762 * driver's problem to ensure this guarantee. 5763 * 5764 */ 5765 void drm_mode_config_init(struct drm_device *dev) 5766 { 5767 mutex_init(&dev->mode_config.mutex); 5768 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5769 mutex_init(&dev->mode_config.idr_mutex); 5770 mutex_init(&dev->mode_config.fb_lock); 5771 mutex_init(&dev->mode_config.blob_lock); 5772 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5773 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5774 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5775 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5776 INIT_LIST_HEAD(&dev->mode_config.property_list); 5777 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5778 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5779 idr_init(&dev->mode_config.crtc_idr); 5780 idr_init(&dev->mode_config.tile_idr); 5781 5782 drm_modeset_lock_all(dev); 5783 drm_mode_create_standard_properties(dev); 5784 drm_modeset_unlock_all(dev); 5785 5786 /* Just to be sure */ 5787 dev->mode_config.num_fb = 0; 5788 dev->mode_config.num_connector = 0; 5789 dev->mode_config.num_crtc = 0; 5790 dev->mode_config.num_encoder = 0; 5791 dev->mode_config.num_overlay_plane = 0; 5792 dev->mode_config.num_total_plane = 0; 5793 } 5794 EXPORT_SYMBOL(drm_mode_config_init); 5795 5796 /** 5797 * drm_mode_config_cleanup - free up DRM mode_config info 5798 * @dev: DRM device 5799 * 5800 * Free up all the connectors and CRTCs associated with this DRM device, then 5801 * free up the framebuffers and associated buffer objects. 5802 * 5803 * Note that since this /should/ happen single-threaded at driver/device 5804 * teardown time, no locking is required. It's the driver's job to ensure that 5805 * this guarantee actually holds true. 5806 * 5807 * FIXME: cleanup any dangling user buffer objects too 5808 */ 5809 void drm_mode_config_cleanup(struct drm_device *dev) 5810 { 5811 struct drm_connector *connector, *ot; 5812 struct drm_crtc *crtc, *ct; 5813 struct drm_encoder *encoder, *enct; 5814 struct drm_framebuffer *fb, *fbt; 5815 struct drm_property *property, *pt; 5816 struct drm_property_blob *blob, *bt; 5817 struct drm_plane *plane, *plt; 5818 5819 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5820 head) { 5821 encoder->funcs->destroy(encoder); 5822 } 5823 5824 list_for_each_entry_safe(connector, ot, 5825 &dev->mode_config.connector_list, head) { 5826 connector->funcs->destroy(connector); 5827 } 5828 5829 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5830 head) { 5831 drm_property_destroy(dev, property); 5832 } 5833 5834 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5835 head_global) { 5836 drm_property_unreference_blob(blob); 5837 } 5838 5839 /* 5840 * Single-threaded teardown context, so it's not required to grab the 5841 * fb_lock to protect against concurrent fb_list access. Contrary, it 5842 * would actually deadlock with the drm_framebuffer_cleanup function. 5843 * 5844 * Also, if there are any framebuffers left, that's a driver leak now, 5845 * so politely WARN about this. 5846 */ 5847 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5848 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5849 drm_framebuffer_free(&fb->refcount); 5850 } 5851 5852 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5853 head) { 5854 plane->funcs->destroy(plane); 5855 } 5856 5857 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5858 crtc->funcs->destroy(crtc); 5859 } 5860 5861 idr_destroy(&dev->mode_config.tile_idr); 5862 idr_destroy(&dev->mode_config.crtc_idr); 5863 mutex_destroy(&dev->mode_config.blob_lock); 5864 mutex_destroy(&dev->mode_config.fb_lock); 5865 mutex_destroy(&dev->mode_config.idr_mutex); 5866 mutex_destroy(&dev->mode_config.mutex); 5867 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5868 } 5869 EXPORT_SYMBOL(drm_mode_config_cleanup); 5870 5871 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5872 unsigned int supported_rotations) 5873 { 5874 static const struct drm_prop_enum_list props[] = { 5875 { DRM_ROTATE_0, "rotate-0" }, 5876 { DRM_ROTATE_90, "rotate-90" }, 5877 { DRM_ROTATE_180, "rotate-180" }, 5878 { DRM_ROTATE_270, "rotate-270" }, 5879 { DRM_REFLECT_X, "reflect-x" }, 5880 { DRM_REFLECT_Y, "reflect-y" }, 5881 }; 5882 5883 return drm_property_create_bitmask(dev, 0, "rotation", 5884 props, ARRAY_SIZE(props), 5885 supported_rotations); 5886 } 5887 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5888 5889 /** 5890 * DOC: Tile group 5891 * 5892 * Tile groups are used to represent tiled monitors with a unique 5893 * integer identifier. Tiled monitors using DisplayID v1.3 have 5894 * a unique 8-byte handle, we store this in a tile group, so we 5895 * have a common identifier for all tiles in a monitor group. 5896 */ 5897 static void drm_tile_group_free(struct kref *kref) 5898 { 5899 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5900 struct drm_device *dev = tg->dev; 5901 mutex_lock(&dev->mode_config.idr_mutex); 5902 idr_remove(&dev->mode_config.tile_idr, tg->id); 5903 mutex_unlock(&dev->mode_config.idr_mutex); 5904 kfree(tg); 5905 } 5906 5907 /** 5908 * drm_mode_put_tile_group - drop a reference to a tile group. 5909 * @dev: DRM device 5910 * @tg: tile group to drop reference to. 5911 * 5912 * drop reference to tile group and free if 0. 5913 */ 5914 void drm_mode_put_tile_group(struct drm_device *dev, 5915 struct drm_tile_group *tg) 5916 { 5917 kref_put(&tg->refcount, drm_tile_group_free); 5918 } 5919 5920 /** 5921 * drm_mode_get_tile_group - get a reference to an existing tile group 5922 * @dev: DRM device 5923 * @topology: 8-bytes unique per monitor. 5924 * 5925 * Use the unique bytes to get a reference to an existing tile group. 5926 * 5927 * RETURNS: 5928 * tile group or NULL if not found. 5929 */ 5930 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 5931 char topology[8]) 5932 { 5933 struct drm_tile_group *tg; 5934 int id; 5935 mutex_lock(&dev->mode_config.idr_mutex); 5936 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 5937 if (!memcmp(tg->group_data, topology, 8)) { 5938 if (!kref_get_unless_zero(&tg->refcount)) 5939 tg = NULL; 5940 mutex_unlock(&dev->mode_config.idr_mutex); 5941 return tg; 5942 } 5943 } 5944 mutex_unlock(&dev->mode_config.idr_mutex); 5945 return NULL; 5946 } 5947 EXPORT_SYMBOL(drm_mode_get_tile_group); 5948 5949 /** 5950 * drm_mode_create_tile_group - create a tile group from a displayid description 5951 * @dev: DRM device 5952 * @topology: 8-bytes unique per monitor. 5953 * 5954 * Create a tile group for the unique monitor, and get a unique 5955 * identifier for the tile group. 5956 * 5957 * RETURNS: 5958 * new tile group or error. 5959 */ 5960 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 5961 char topology[8]) 5962 { 5963 struct drm_tile_group *tg; 5964 int ret; 5965 5966 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 5967 if (!tg) 5968 return ERR_PTR(-ENOMEM); 5969 5970 kref_init(&tg->refcount); 5971 memcpy(tg->group_data, topology, 8); 5972 tg->dev = dev; 5973 5974 idr_preload(GFP_KERNEL); 5975 mutex_lock(&dev->mode_config.idr_mutex); 5976 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 5977 if (ret >= 0) { 5978 tg->id = ret; 5979 } else { 5980 kfree(tg); 5981 tg = ERR_PTR(ret); 5982 } 5983 5984 mutex_unlock(&dev->mode_config.idr_mutex); 5985 idr_preload_end(); 5986 return tg; 5987 } 5988 EXPORT_SYMBOL(drm_mode_create_tile_group); 5989
Indexes created Fri Oct 17 03:10:13 GMT 2025