1 /* 2 * Copyright (c) 2006-2008 Intel Corporation 3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 4 * Copyright (c) 2008 Red Hat Inc. 5 * 6 * DRM core CRTC related functions 7 * 8 * Permission to use, copy, modify, distribute, and sell this software and its 9 * documentation for any purpose is hereby granted without fee, provided that 10 * the above copyright notice appear in all copies and that both that copyright 11 * notice and this permission notice appear in supporting documentation, and 12 * that the name of the copyright holders not be used in advertising or 13 * publicity pertaining to distribution of the software without specific, 14 * written prior permission. The copyright holders make no representations 15 * about the suitability of this software for any purpose. It is provided "as 16 * is" without express or implied warranty. 17 * 18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 24 * OF THIS SOFTWARE. 25 * 26 * Authors: 27 * Keith Packard 28 * Eric Anholt <eric@anholt.net> 29 * Dave Airlie <airlied@linux.ie> 30 * Jesse Barnes <jesse.barnes@intel.com> 31 */ 32 #include <linux/ctype.h> 33 #include <linux/list.h> 34 #include <linux/export.h> 35 #include <drm/drmP.h> 36 #include <drm/drm_crtc.h> 37 #include <drm/drm_edid.h> 38 #include <uapi_drm/drm_fourcc.h> 39 #include <linux/slab.h> 40 #include <drm/drm_modeset_lock.h> 41 #include <drm/drm_atomic.h> 42 43 #include "drm_crtc_internal.h" 44 #include "drm_internal.h" 45 46 static struct drm_framebuffer * 47 internal_framebuffer_create(struct drm_device *dev, 48 struct drm_mode_fb_cmd2 *r, 49 struct drm_file *file_priv); 50 51 /* Avoid boilerplate. I'm tired of typing. */ 52 #define DRM_ENUM_NAME_FN(fnname, list) \ 53 const char *fnname(int val) \ 54 { \ 55 int i; \ 56 for (i = 0; i < ARRAY_SIZE(list); i++) { \ 57 if (list[i].type == val) \ 58 return list[i].name; \ 59 } \ 60 return "(unknown)"; \ 61 } 62 63 /* 64 * Global properties 65 */ 66 static const struct drm_prop_enum_list drm_dpms_enum_list[] = { 67 { DRM_MODE_DPMS_ON, "On" }, 68 { DRM_MODE_DPMS_STANDBY, "Standby" }, 69 { DRM_MODE_DPMS_SUSPEND, "Suspend" }, 70 { DRM_MODE_DPMS_OFF, "Off" } 71 }; 72 73 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) 74 75 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { 76 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 77 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 78 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 79 }; 80 81 /* 82 * Optional properties 83 */ 84 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { 85 { DRM_MODE_SCALE_NONE, "None" }, 86 { DRM_MODE_SCALE_FULLSCREEN, "Full" }, 87 { DRM_MODE_SCALE_CENTER, "Center" }, 88 { DRM_MODE_SCALE_ASPECT, "Full aspect" }, 89 }; 90 91 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { 92 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, 93 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, 94 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, 95 }; 96 97 /* 98 * Non-global properties, but "required" for certain connectors. 99 */ 100 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { 101 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 102 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 103 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 104 }; 105 106 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) 107 108 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { 109 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 110 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 111 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 112 }; 113 114 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, 115 drm_dvi_i_subconnector_enum_list) 116 117 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { 118 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 119 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 120 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 121 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 122 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 123 }; 124 125 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) 126 127 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { 128 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 129 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 130 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 131 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 132 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 133 }; 134 135 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, 136 drm_tv_subconnector_enum_list) 137 138 static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = { 139 { DRM_MODE_DIRTY_OFF, "Off" }, 140 { DRM_MODE_DIRTY_ON, "On" }, 141 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" }, 142 }; 143 144 struct drm_conn_prop_enum_list { 145 int type; 146 const char *name; 147 int count; 148 }; 149 150 /* 151 * Connector and encoder types. 152 */ 153 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { 154 { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, 155 { DRM_MODE_CONNECTOR_VGA, "VGA" }, 156 { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, 157 { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, 158 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, 159 { DRM_MODE_CONNECTOR_Composite, "Composite" }, 160 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, 161 { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, 162 { DRM_MODE_CONNECTOR_Component, "Component" }, 163 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, 164 { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, 165 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, 166 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, 167 { DRM_MODE_CONNECTOR_TV, "TV" }, 168 { DRM_MODE_CONNECTOR_eDP, "eDP" }, 169 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, 170 { DRM_MODE_CONNECTOR_DSI, "DSI" }, 171 }; 172 173 static const struct drm_prop_enum_list drm_encoder_enum_list[] = { 174 { DRM_MODE_ENCODER_NONE, "None" }, 175 { DRM_MODE_ENCODER_DAC, "DAC" }, 176 { DRM_MODE_ENCODER_TMDS, "TMDS" }, 177 { DRM_MODE_ENCODER_LVDS, "LVDS" }, 178 { DRM_MODE_ENCODER_TVDAC, "TV" }, 179 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" }, 180 { DRM_MODE_ENCODER_DSI, "DSI" }, 181 { DRM_MODE_ENCODER_DPMST, "DP MST" }, 182 }; 183 184 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { 185 { SubPixelUnknown, "Unknown" }, 186 { SubPixelHorizontalRGB, "Horizontal RGB" }, 187 { SubPixelHorizontalBGR, "Horizontal BGR" }, 188 { SubPixelVerticalRGB, "Vertical RGB" }, 189 { SubPixelVerticalBGR, "Vertical BGR" }, 190 { SubPixelNone, "None" }, 191 }; 192 193 void drm_connector_ida_init(void) 194 { 195 #if 0 196 int i; 197 198 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 199 ida_init(&drm_connector_enum_list[i].ida); 200 #endif 201 } 202 203 void drm_connector_ida_destroy(void) 204 { 205 #if 0 206 int i; 207 208 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 209 ida_destroy(&drm_connector_enum_list[i].ida); 210 #endif 211 } 212 213 /** 214 * drm_get_connector_status_name - return a string for connector status 215 * @status: connector status to compute name of 216 * 217 * In contrast to the other drm_get_*_name functions this one here returns a 218 * const pointer and hence is threadsafe. 219 */ 220 const char *drm_get_connector_status_name(enum drm_connector_status status) 221 { 222 if (status == connector_status_connected) 223 return "connected"; 224 else if (status == connector_status_disconnected) 225 return "disconnected"; 226 else 227 return "unknown"; 228 } 229 EXPORT_SYMBOL(drm_get_connector_status_name); 230 231 /** 232 * drm_get_subpixel_order_name - return a string for a given subpixel enum 233 * @order: enum of subpixel_order 234 * 235 * Note you could abuse this and return something out of bounds, but that 236 * would be a caller error. No unscrubbed user data should make it here. 237 */ 238 const char *drm_get_subpixel_order_name(enum subpixel_order order) 239 { 240 return drm_subpixel_enum_list[order].name; 241 } 242 EXPORT_SYMBOL(drm_get_subpixel_order_name); 243 244 static char printable_char(int c) 245 { 246 return isascii(c) && isprint(c) ? c : '?'; 247 } 248 249 /** 250 * drm_get_format_name - return a string for drm fourcc format 251 * @format: format to compute name of 252 * 253 * Note that the buffer used by this function is globally shared and owned by 254 * the function itself. 255 * 256 * FIXME: This isn't really multithreading safe. 257 */ 258 const char *drm_get_format_name(uint32_t format) 259 { 260 static char buf[32]; 261 262 ksnprintf(buf, sizeof(buf), 263 "%c%c%c%c %s-endian (0x%08x)", 264 printable_char(format & 0xff), 265 printable_char((format >> 8) & 0xff), 266 printable_char((format >> 16) & 0xff), 267 printable_char((format >> 24) & 0x7f), 268 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", 269 format); 270 271 return buf; 272 } 273 EXPORT_SYMBOL(drm_get_format_name); 274 275 /* 276 * Internal function to assign a slot in the object idr and optionally 277 * register the object into the idr. 278 */ 279 static int drm_mode_object_get_reg(struct drm_device *dev, 280 struct drm_mode_object *obj, 281 uint32_t obj_type, 282 bool register_obj) 283 { 284 int ret; 285 286 mutex_lock(&dev->mode_config.idr_mutex); 287 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); 288 if (ret >= 0) { 289 /* 290 * Set up the object linking under the protection of the idr 291 * lock so that other users can't see inconsistent state. 292 */ 293 obj->id = ret; 294 obj->type = obj_type; 295 } 296 mutex_unlock(&dev->mode_config.idr_mutex); 297 298 return ret < 0 ? ret : 0; 299 } 300 301 /** 302 * drm_mode_object_get - allocate a new modeset identifier 303 * @dev: DRM device 304 * @obj: object pointer, used to generate unique ID 305 * @obj_type: object type 306 * 307 * Create a unique identifier based on @ptr in @dev's identifier space. Used 308 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix 309 * modeset identifiers are _not_ reference counted. Hence don't use this for 310 * reference counted modeset objects like framebuffers. 311 * 312 * Returns: 313 * New unique (relative to other objects in @dev) integer identifier for the 314 * object. 315 */ 316 int drm_mode_object_get(struct drm_device *dev, 317 struct drm_mode_object *obj, uint32_t obj_type) 318 { 319 return drm_mode_object_get_reg(dev, obj, obj_type, true); 320 } 321 322 static void drm_mode_object_register(struct drm_device *dev, 323 struct drm_mode_object *obj) 324 { 325 mutex_lock(&dev->mode_config.idr_mutex); 326 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); 327 mutex_unlock(&dev->mode_config.idr_mutex); 328 } 329 330 /** 331 * drm_mode_object_put - free a modeset identifer 332 * @dev: DRM device 333 * @object: object to free 334 * 335 * Free @id from @dev's unique identifier pool. Note that despite the _get 336 * postfix modeset identifiers are _not_ reference counted. Hence don't use this 337 * for reference counted modeset objects like framebuffers. 338 */ 339 void drm_mode_object_put(struct drm_device *dev, 340 struct drm_mode_object *object) 341 { 342 mutex_lock(&dev->mode_config.idr_mutex); 343 idr_remove(&dev->mode_config.crtc_idr, object->id); 344 mutex_unlock(&dev->mode_config.idr_mutex); 345 } 346 347 static struct drm_mode_object *_object_find(struct drm_device *dev, 348 uint32_t id, uint32_t type) 349 { 350 struct drm_mode_object *obj = NULL; 351 352 mutex_lock(&dev->mode_config.idr_mutex); 353 obj = idr_find(&dev->mode_config.crtc_idr, id); 354 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) 355 obj = NULL; 356 if (obj && obj->id != id) 357 obj = NULL; 358 /* don't leak out unref'd fb's */ 359 if (obj && 360 (obj->type == DRM_MODE_OBJECT_FB || 361 obj->type == DRM_MODE_OBJECT_BLOB)) 362 obj = NULL; 363 mutex_unlock(&dev->mode_config.idr_mutex); 364 365 return obj; 366 } 367 368 /** 369 * drm_mode_object_find - look up a drm object with static lifetime 370 * @dev: drm device 371 * @id: id of the mode object 372 * @type: type of the mode object 373 * 374 * Note that framebuffers cannot be looked up with this functions - since those 375 * are reference counted, they need special treatment. Even with 376 * DRM_MODE_OBJECT_ANY (although that will simply return NULL 377 * rather than WARN_ON()). 378 */ 379 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, 380 uint32_t id, uint32_t type) 381 { 382 struct drm_mode_object *obj = NULL; 383 384 /* Framebuffers are reference counted and need their own lookup 385 * function.*/ 386 WARN_ON(type == DRM_MODE_OBJECT_FB || type == DRM_MODE_OBJECT_BLOB); 387 obj = _object_find(dev, id, type); 388 return obj; 389 } 390 EXPORT_SYMBOL(drm_mode_object_find); 391 392 /** 393 * drm_framebuffer_init - initialize a framebuffer 394 * @dev: DRM device 395 * @fb: framebuffer to be initialized 396 * @funcs: ... with these functions 397 * 398 * Allocates an ID for the framebuffer's parent mode object, sets its mode 399 * functions & device file and adds it to the master fd list. 400 * 401 * IMPORTANT: 402 * This functions publishes the fb and makes it available for concurrent access 403 * by other users. Which means by this point the fb _must_ be fully set up - 404 * since all the fb attributes are invariant over its lifetime, no further 405 * locking but only correct reference counting is required. 406 * 407 * Returns: 408 * Zero on success, error code on failure. 409 */ 410 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, 411 const struct drm_framebuffer_funcs *funcs) 412 { 413 int ret; 414 415 mutex_lock(&dev->mode_config.fb_lock); 416 kref_init(&fb->refcount); 417 INIT_LIST_HEAD(&fb->filp_head); 418 fb->dev = dev; 419 fb->funcs = funcs; 420 421 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB); 422 if (ret) 423 goto out; 424 425 dev->mode_config.num_fb++; 426 list_add(&fb->head, &dev->mode_config.fb_list); 427 out: 428 mutex_unlock(&dev->mode_config.fb_lock); 429 430 return 0; 431 } 432 EXPORT_SYMBOL(drm_framebuffer_init); 433 434 /* dev->mode_config.fb_lock must be held! */ 435 static void __drm_framebuffer_unregister(struct drm_device *dev, 436 struct drm_framebuffer *fb) 437 { 438 mutex_lock(&dev->mode_config.idr_mutex); 439 idr_remove(&dev->mode_config.crtc_idr, fb->base.id); 440 mutex_unlock(&dev->mode_config.idr_mutex); 441 442 fb->base.id = 0; 443 } 444 445 static void drm_framebuffer_free(struct kref *kref) 446 { 447 struct drm_framebuffer *fb = 448 container_of(kref, struct drm_framebuffer, refcount); 449 struct drm_device *dev = fb->dev; 450 451 /* 452 * The lookup idr holds a weak reference, which has not necessarily been 453 * removed at this point. Check for that. 454 */ 455 mutex_lock(&dev->mode_config.fb_lock); 456 if (fb->base.id) { 457 /* Mark fb as reaped and drop idr ref. */ 458 __drm_framebuffer_unregister(dev, fb); 459 } 460 mutex_unlock(&dev->mode_config.fb_lock); 461 462 fb->funcs->destroy(fb); 463 } 464 465 static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev, 466 uint32_t id) 467 { 468 struct drm_mode_object *obj = NULL; 469 struct drm_framebuffer *fb; 470 471 mutex_lock(&dev->mode_config.idr_mutex); 472 obj = idr_find(&dev->mode_config.crtc_idr, id); 473 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id)) 474 fb = NULL; 475 else 476 fb = obj_to_fb(obj); 477 mutex_unlock(&dev->mode_config.idr_mutex); 478 479 return fb; 480 } 481 482 /** 483 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference 484 * @dev: drm device 485 * @id: id of the fb object 486 * 487 * If successful, this grabs an additional reference to the framebuffer - 488 * callers need to make sure to eventually unreference the returned framebuffer 489 * again, using @drm_framebuffer_unreference. 490 */ 491 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, 492 uint32_t id) 493 { 494 struct drm_framebuffer *fb; 495 496 mutex_lock(&dev->mode_config.fb_lock); 497 fb = __drm_framebuffer_lookup(dev, id); 498 if (fb) { 499 if (!kref_get_unless_zero(&fb->refcount)) 500 fb = NULL; 501 } 502 mutex_unlock(&dev->mode_config.fb_lock); 503 504 return fb; 505 } 506 EXPORT_SYMBOL(drm_framebuffer_lookup); 507 508 /** 509 * drm_framebuffer_unreference - unref a framebuffer 510 * @fb: framebuffer to unref 511 * 512 * This functions decrements the fb's refcount and frees it if it drops to zero. 513 */ 514 void drm_framebuffer_unreference(struct drm_framebuffer *fb) 515 { 516 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 517 kref_put(&fb->refcount, drm_framebuffer_free); 518 } 519 EXPORT_SYMBOL(drm_framebuffer_unreference); 520 521 /** 522 * drm_framebuffer_reference - incr the fb refcnt 523 * @fb: framebuffer 524 * 525 * This functions increments the fb's refcount. 526 */ 527 void drm_framebuffer_reference(struct drm_framebuffer *fb) 528 { 529 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 530 kref_get(&fb->refcount); 531 } 532 EXPORT_SYMBOL(drm_framebuffer_reference); 533 534 /** 535 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr 536 * @fb: fb to unregister 537 * 538 * Drivers need to call this when cleaning up driver-private framebuffers, e.g. 539 * those used for fbdev. Note that the caller must hold a reference of it's own, 540 * i.e. the object may not be destroyed through this call (since it'll lead to a 541 * locking inversion). 542 */ 543 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) 544 { 545 struct drm_device *dev = fb->dev; 546 547 mutex_lock(&dev->mode_config.fb_lock); 548 /* Mark fb as reaped and drop idr ref. */ 549 __drm_framebuffer_unregister(dev, fb); 550 mutex_unlock(&dev->mode_config.fb_lock); 551 } 552 EXPORT_SYMBOL(drm_framebuffer_unregister_private); 553 554 /** 555 * drm_framebuffer_cleanup - remove a framebuffer object 556 * @fb: framebuffer to remove 557 * 558 * Cleanup framebuffer. This function is intended to be used from the drivers 559 * ->destroy callback. It can also be used to clean up driver private 560 * framebuffers embedded into a larger structure. 561 * 562 * Note that this function does not remove the fb from active usuage - if it is 563 * still used anywhere, hilarity can ensue since userspace could call getfb on 564 * the id and get back -EINVAL. Obviously no concern at driver unload time. 565 * 566 * Also, the framebuffer will not be removed from the lookup idr - for 567 * user-created framebuffers this will happen in in the rmfb ioctl. For 568 * driver-private objects (e.g. for fbdev) drivers need to explicitly call 569 * drm_framebuffer_unregister_private. 570 */ 571 void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 572 { 573 struct drm_device *dev = fb->dev; 574 575 mutex_lock(&dev->mode_config.fb_lock); 576 list_del(&fb->head); 577 dev->mode_config.num_fb--; 578 mutex_unlock(&dev->mode_config.fb_lock); 579 } 580 EXPORT_SYMBOL(drm_framebuffer_cleanup); 581 582 /** 583 * drm_framebuffer_remove - remove and unreference a framebuffer object 584 * @fb: framebuffer to remove 585 * 586 * Scans all the CRTCs and planes in @dev's mode_config. If they're 587 * using @fb, removes it, setting it to NULL. Then drops the reference to the 588 * passed-in framebuffer. Might take the modeset locks. 589 * 590 * Note that this function optimizes the cleanup away if the caller holds the 591 * last reference to the framebuffer. It is also guaranteed to not take the 592 * modeset locks in this case. 593 */ 594 void drm_framebuffer_remove(struct drm_framebuffer *fb) 595 { 596 struct drm_device *dev = fb->dev; 597 struct drm_crtc *crtc; 598 struct drm_plane *plane; 599 struct drm_mode_set set; 600 int ret; 601 602 WARN_ON(!list_empty(&fb->filp_head)); 603 604 /* 605 * drm ABI mandates that we remove any deleted framebuffers from active 606 * useage. But since most sane clients only remove framebuffers they no 607 * longer need, try to optimize this away. 608 * 609 * Since we're holding a reference ourselves, observing a refcount of 1 610 * means that we're the last holder and can skip it. Also, the refcount 611 * can never increase from 1 again, so we don't need any barriers or 612 * locks. 613 * 614 * Note that userspace could try to race with use and instate a new 615 * usage _after_ we've cleared all current ones. End result will be an 616 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot 617 * in this manner. 618 */ 619 if (atomic_read(&fb->refcount.refcount) > 1) { 620 drm_modeset_lock_all(dev); 621 /* remove from any CRTC */ 622 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 623 if (crtc->primary->fb == fb) { 624 /* should turn off the crtc */ 625 memset(&set, 0, sizeof(struct drm_mode_set)); 626 set.crtc = crtc; 627 set.fb = NULL; 628 ret = drm_mode_set_config_internal(&set); 629 if (ret) 630 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); 631 } 632 } 633 634 list_for_each_entry(plane, &dev->mode_config.plane_list, head) { 635 if (plane->fb == fb) 636 drm_plane_force_disable(plane); 637 } 638 drm_modeset_unlock_all(dev); 639 } 640 641 drm_framebuffer_unreference(fb); 642 } 643 EXPORT_SYMBOL(drm_framebuffer_remove); 644 645 DEFINE_WW_CLASS(crtc_ww_class); 646 647 /** 648 * drm_crtc_init_with_planes - Initialise a new CRTC object with 649 * specified primary and cursor planes. 650 * @dev: DRM device 651 * @crtc: CRTC object to init 652 * @primary: Primary plane for CRTC 653 * @cursor: Cursor plane for CRTC 654 * @funcs: callbacks for the new CRTC 655 * 656 * Inits a new object created as base part of a driver crtc object. 657 * 658 * Returns: 659 * Zero on success, error code on failure. 660 */ 661 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 662 struct drm_plane *primary, 663 struct drm_plane *cursor, 664 const struct drm_crtc_funcs *funcs) 665 { 666 struct drm_mode_config *config = &dev->mode_config; 667 int ret; 668 669 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); 670 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); 671 672 crtc->dev = dev; 673 crtc->funcs = funcs; 674 crtc->invert_dimensions = false; 675 676 drm_modeset_lock_init(&crtc->mutex); 677 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 678 if (ret) 679 return ret; 680 681 crtc->base.properties = &crtc->properties; 682 683 list_add_tail(&crtc->head, &config->crtc_list); 684 config->num_crtc++; 685 686 crtc->primary = primary; 687 crtc->cursor = cursor; 688 if (primary) 689 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 690 if (cursor) 691 cursor->possible_crtcs = 1 << drm_crtc_index(crtc); 692 693 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 694 drm_object_attach_property(&crtc->base, config->prop_active, 0); 695 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); 696 } 697 698 return 0; 699 } 700 EXPORT_SYMBOL(drm_crtc_init_with_planes); 701 702 /** 703 * drm_crtc_cleanup - Clean up the core crtc usage 704 * @crtc: CRTC to cleanup 705 * 706 * This function cleans up @crtc and removes it from the DRM mode setting 707 * core. Note that the function does *not* free the crtc structure itself, 708 * this is the responsibility of the caller. 709 */ 710 void drm_crtc_cleanup(struct drm_crtc *crtc) 711 { 712 struct drm_device *dev = crtc->dev; 713 714 kfree(crtc->gamma_store); 715 crtc->gamma_store = NULL; 716 717 drm_modeset_lock_fini(&crtc->mutex); 718 719 drm_mode_object_put(dev, &crtc->base); 720 list_del(&crtc->head); 721 dev->mode_config.num_crtc--; 722 723 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); 724 if (crtc->state && crtc->funcs->atomic_destroy_state) 725 crtc->funcs->atomic_destroy_state(crtc, crtc->state); 726 727 memset(crtc, 0, sizeof(*crtc)); 728 } 729 EXPORT_SYMBOL(drm_crtc_cleanup); 730 731 /** 732 * drm_crtc_index - find the index of a registered CRTC 733 * @crtc: CRTC to find index for 734 * 735 * Given a registered CRTC, return the index of that CRTC within a DRM 736 * device's list of CRTCs. 737 */ 738 unsigned int drm_crtc_index(struct drm_crtc *crtc) 739 { 740 unsigned int index = 0; 741 struct drm_crtc *tmp; 742 743 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { 744 if (tmp == crtc) 745 return index; 746 747 index++; 748 } 749 750 BUG(); 751 } 752 EXPORT_SYMBOL(drm_crtc_index); 753 754 /* 755 * drm_mode_remove - remove and free a mode 756 * @connector: connector list to modify 757 * @mode: mode to remove 758 * 759 * Remove @mode from @connector's mode list, then free it. 760 */ 761 static void drm_mode_remove(struct drm_connector *connector, 762 struct drm_display_mode *mode) 763 { 764 list_del(&mode->head); 765 drm_mode_destroy(connector->dev, mode); 766 } 767 768 /** 769 * drm_display_info_set_bus_formats - set the supported bus formats 770 * @info: display info to store bus formats in 771 * @fmts: array containing the supported bus formats 772 * @nfmts: the number of entries in the fmts array 773 * 774 * Store the supported bus formats in display info structure. 775 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for 776 * a full list of available formats. 777 */ 778 int drm_display_info_set_bus_formats(struct drm_display_info *info, 779 const u32 *formats, 780 unsigned int num_formats) 781 { 782 u32 *fmts = NULL; 783 784 if (!formats && num_formats) 785 return -EINVAL; 786 787 if (formats && num_formats) { 788 fmts = kmemdup(formats, sizeof(*formats) * num_formats, 789 GFP_KERNEL); 790 if (!fmts) 791 return -ENOMEM; 792 } 793 794 kfree(info->bus_formats); 795 info->bus_formats = fmts; 796 info->num_bus_formats = num_formats; 797 798 return 0; 799 } 800 EXPORT_SYMBOL(drm_display_info_set_bus_formats); 801 802 /** 803 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 804 * @connector: connector to quwery 805 * 806 * The kernel supports per-connector configration of its consoles through 807 * use of the video= parameter. This function parses that option and 808 * extracts the user's specified mode (or enable/disable status) for a 809 * particular connector. This is typically only used during the early fbdev 810 * setup. 811 */ 812 static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 813 { 814 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 815 char *option = NULL; 816 817 if (fb_get_options(connector->name, &option)) 818 return; 819 820 if (!drm_mode_parse_command_line_for_connector(option, 821 connector, 822 mode)) 823 return; 824 825 if (mode->force) { 826 const char *s; 827 828 switch (mode->force) { 829 case DRM_FORCE_OFF: 830 s = "OFF"; 831 break; 832 case DRM_FORCE_ON_DIGITAL: 833 s = "ON - dig"; 834 break; 835 default: 836 case DRM_FORCE_ON: 837 s = "ON"; 838 break; 839 } 840 841 DRM_INFO("forcing %s connector %s\n", connector->name, s); 842 connector->force = mode->force; 843 } 844 845 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 846 connector->name, 847 mode->xres, mode->yres, 848 mode->refresh_specified ? mode->refresh : 60, 849 mode->rb ? " reduced blanking" : "", 850 mode->margins ? " with margins" : "", 851 mode->interlace ? " interlaced" : ""); 852 } 853 854 /** 855 * drm_connector_init - Init a preallocated connector 856 * @dev: DRM device 857 * @connector: the connector to init 858 * @funcs: callbacks for this connector 859 * @connector_type: user visible type of the connector 860 * 861 * Initialises a preallocated connector. Connectors should be 862 * subclassed as part of driver connector objects. 863 * 864 * Returns: 865 * Zero on success, error code on failure. 866 */ 867 int drm_connector_init(struct drm_device *dev, 868 struct drm_connector *connector, 869 const struct drm_connector_funcs *funcs, 870 int connector_type) 871 { 872 struct drm_mode_config *config = &dev->mode_config; 873 int ret; 874 875 drm_modeset_lock_all(dev); 876 877 ret = drm_mode_object_get(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR); 878 if (ret) 879 goto out_unlock; 880 881 connector->base.properties = &connector->properties; 882 connector->dev = dev; 883 connector->funcs = funcs; 884 connector->connector_type = connector_type; 885 connector->connector_type_id = 886 ++drm_connector_enum_list[connector_type].count; /* TODO */ 887 if (connector->connector_type_id < 0) { 888 ret = connector->connector_type_id; 889 goto out_put; 890 } 891 connector->name = 892 drm_asprintf(GFP_KERNEL, "%s-%d", 893 drm_connector_enum_list[connector_type].name, 894 connector->connector_type_id); 895 if (!connector->name) { 896 ret = -ENOMEM; 897 goto out_put; 898 } 899 900 INIT_LIST_HEAD(&connector->probed_modes); 901 INIT_LIST_HEAD(&connector->modes); 902 connector->edid_blob_ptr = NULL; 903 connector->status = connector_status_unknown; 904 905 drm_connector_get_cmdline_mode(connector); 906 907 /* We should add connectors at the end to avoid upsetting the connector 908 * index too much. */ 909 list_add_tail(&connector->head, &config->connector_list); 910 config->num_connector++; 911 912 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 913 drm_object_attach_property(&connector->base, 914 config->edid_property, 915 0); 916 917 drm_object_attach_property(&connector->base, 918 config->dpms_property, 0); 919 920 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 921 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); 922 } 923 924 connector->debugfs_entry = NULL; 925 926 out_put: 927 if (ret) 928 drm_mode_object_put(dev, &connector->base); 929 930 out_unlock: 931 drm_modeset_unlock_all(dev); 932 933 return ret; 934 } 935 EXPORT_SYMBOL(drm_connector_init); 936 937 /** 938 * drm_connector_cleanup - cleans up an initialised connector 939 * @connector: connector to cleanup 940 * 941 * Cleans up the connector but doesn't free the object. 942 */ 943 void drm_connector_cleanup(struct drm_connector *connector) 944 { 945 struct drm_device *dev = connector->dev; 946 struct drm_display_mode *mode, *t; 947 948 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 949 drm_mode_remove(connector, mode); 950 951 list_for_each_entry_safe(mode, t, &connector->modes, head) 952 drm_mode_remove(connector, mode); 953 954 kfree(connector->display_info.bus_formats); 955 drm_mode_object_put(dev, &connector->base); 956 kfree(connector->name); 957 connector->name = NULL; 958 list_del(&connector->head); 959 dev->mode_config.num_connector--; 960 961 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 962 if (connector->state && connector->funcs->atomic_destroy_state) 963 connector->funcs->atomic_destroy_state(connector, 964 connector->state); 965 966 memset(connector, 0, sizeof(*connector)); 967 } 968 EXPORT_SYMBOL(drm_connector_cleanup); 969 970 /** 971 * drm_connector_index - find the index of a registered connector 972 * @connector: connector to find index for 973 * 974 * Given a registered connector, return the index of that connector within a DRM 975 * device's list of connectors. 976 */ 977 unsigned int drm_connector_index(struct drm_connector *connector) 978 { 979 unsigned int index = 0; 980 struct drm_connector *tmp; 981 struct drm_mode_config *config = &connector->dev->mode_config; 982 983 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 984 985 list_for_each_entry(tmp, &connector->dev->mode_config.connector_list, head) { 986 if (tmp == connector) 987 return index; 988 989 index++; 990 } 991 992 BUG(); 993 } 994 EXPORT_SYMBOL(drm_connector_index); 995 996 /** 997 * drm_connector_register - register a connector 998 * @connector: the connector to register 999 * 1000 * Register userspace interfaces for a connector 1001 * 1002 * Returns: 1003 * Zero on success, error code on failure. 1004 */ 1005 int drm_connector_register(struct drm_connector *connector) 1006 { 1007 int ret; 1008 1009 drm_mode_object_register(connector->dev, &connector->base); 1010 1011 ret = drm_sysfs_connector_add(connector); 1012 if (ret) 1013 return ret; 1014 1015 ret = drm_debugfs_connector_add(connector); 1016 if (ret) { 1017 drm_sysfs_connector_remove(connector); 1018 return ret; 1019 } 1020 1021 return 0; 1022 } 1023 EXPORT_SYMBOL(drm_connector_register); 1024 1025 /** 1026 * drm_connector_unregister - unregister a connector 1027 * @connector: the connector to unregister 1028 * 1029 * Unregister userspace interfaces for a connector 1030 */ 1031 void drm_connector_unregister(struct drm_connector *connector) 1032 { 1033 drm_sysfs_connector_remove(connector); 1034 #if 0 1035 drm_debugfs_connector_remove(connector); 1036 #endif 1037 } 1038 EXPORT_SYMBOL(drm_connector_unregister); 1039 1040 1041 /** 1042 * drm_connector_unplug_all - unregister connector userspace interfaces 1043 * @dev: drm device 1044 * 1045 * This function unregisters all connector userspace interfaces in sysfs. Should 1046 * be call when the device is disconnected, e.g. from an usb driver's 1047 * ->disconnect callback. 1048 */ 1049 void drm_connector_unplug_all(struct drm_device *dev) 1050 { 1051 struct drm_connector *connector; 1052 1053 /* taking the mode config mutex ends up in a clash with sysfs */ 1054 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1055 drm_connector_unregister(connector); 1056 1057 } 1058 EXPORT_SYMBOL(drm_connector_unplug_all); 1059 1060 /** 1061 * drm_encoder_init - Init a preallocated encoder 1062 * @dev: drm device 1063 * @encoder: the encoder to init 1064 * @funcs: callbacks for this encoder 1065 * @encoder_type: user visible type of the encoder 1066 * 1067 * Initialises a preallocated encoder. Encoder should be 1068 * subclassed as part of driver encoder objects. 1069 * 1070 * Returns: 1071 * Zero on success, error code on failure. 1072 */ 1073 int drm_encoder_init(struct drm_device *dev, 1074 struct drm_encoder *encoder, 1075 const struct drm_encoder_funcs *funcs, 1076 int encoder_type) 1077 { 1078 int ret; 1079 1080 drm_modeset_lock_all(dev); 1081 1082 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1083 if (ret) 1084 goto out_unlock; 1085 1086 encoder->dev = dev; 1087 encoder->encoder_type = encoder_type; 1088 encoder->funcs = funcs; 1089 encoder->name = drm_asprintf(GFP_KERNEL, "%s-%d", 1090 drm_encoder_enum_list[encoder_type].name, 1091 encoder->base.id); 1092 if (!encoder->name) { 1093 ret = -ENOMEM; 1094 goto out_put; 1095 } 1096 1097 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1098 dev->mode_config.num_encoder++; 1099 1100 out_put: 1101 if (ret) 1102 drm_mode_object_put(dev, &encoder->base); 1103 1104 out_unlock: 1105 drm_modeset_unlock_all(dev); 1106 1107 return ret; 1108 } 1109 EXPORT_SYMBOL(drm_encoder_init); 1110 1111 /** 1112 * drm_encoder_cleanup - cleans up an initialised encoder 1113 * @encoder: encoder to cleanup 1114 * 1115 * Cleans up the encoder but doesn't free the object. 1116 */ 1117 void drm_encoder_cleanup(struct drm_encoder *encoder) 1118 { 1119 struct drm_device *dev = encoder->dev; 1120 1121 drm_modeset_lock_all(dev); 1122 drm_mode_object_put(dev, &encoder->base); 1123 kfree(encoder->name); 1124 list_del(&encoder->head); 1125 dev->mode_config.num_encoder--; 1126 drm_modeset_unlock_all(dev); 1127 1128 memset(encoder, 0, sizeof(*encoder)); 1129 } 1130 EXPORT_SYMBOL(drm_encoder_cleanup); 1131 1132 /** 1133 * drm_universal_plane_init - Initialize a new universal plane object 1134 * @dev: DRM device 1135 * @plane: plane object to init 1136 * @possible_crtcs: bitmask of possible CRTCs 1137 * @funcs: callbacks for the new plane 1138 * @formats: array of supported formats (%DRM_FORMAT_*) 1139 * @format_count: number of elements in @formats 1140 * @type: type of plane (overlay, primary, cursor) 1141 * 1142 * Initializes a plane object of type @type. 1143 * 1144 * Returns: 1145 * Zero on success, error code on failure. 1146 */ 1147 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1148 unsigned long possible_crtcs, 1149 const struct drm_plane_funcs *funcs, 1150 const uint32_t *formats, uint32_t format_count, 1151 enum drm_plane_type type) 1152 { 1153 struct drm_mode_config *config = &dev->mode_config; 1154 int ret; 1155 1156 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1157 if (ret) 1158 return ret; 1159 1160 drm_modeset_lock_init(&plane->mutex); 1161 1162 plane->base.properties = &plane->properties; 1163 plane->dev = dev; 1164 plane->funcs = funcs; 1165 plane->format_types = kmalloc(sizeof(uint32_t) * format_count, 1166 M_DRM, M_WAITOK); 1167 if (!plane->format_types) { 1168 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1169 drm_mode_object_put(dev, &plane->base); 1170 return -ENOMEM; 1171 } 1172 1173 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1174 plane->format_count = format_count; 1175 plane->possible_crtcs = possible_crtcs; 1176 plane->type = type; 1177 1178 list_add_tail(&plane->head, &config->plane_list); 1179 config->num_total_plane++; 1180 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1181 config->num_overlay_plane++; 1182 1183 drm_object_attach_property(&plane->base, 1184 config->plane_type_property, 1185 plane->type); 1186 1187 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 1188 drm_object_attach_property(&plane->base, config->prop_fb_id, 0); 1189 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); 1190 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); 1191 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); 1192 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); 1193 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); 1194 drm_object_attach_property(&plane->base, config->prop_src_x, 0); 1195 drm_object_attach_property(&plane->base, config->prop_src_y, 0); 1196 drm_object_attach_property(&plane->base, config->prop_src_w, 0); 1197 drm_object_attach_property(&plane->base, config->prop_src_h, 0); 1198 } 1199 1200 return 0; 1201 } 1202 EXPORT_SYMBOL(drm_universal_plane_init); 1203 1204 /** 1205 * drm_plane_init - Initialize a legacy plane 1206 * @dev: DRM device 1207 * @plane: plane object to init 1208 * @possible_crtcs: bitmask of possible CRTCs 1209 * @funcs: callbacks for the new plane 1210 * @formats: array of supported formats (%DRM_FORMAT_*) 1211 * @format_count: number of elements in @formats 1212 * @is_primary: plane type (primary vs overlay) 1213 * 1214 * Legacy API to initialize a DRM plane. 1215 * 1216 * New drivers should call drm_universal_plane_init() instead. 1217 * 1218 * Returns: 1219 * Zero on success, error code on failure. 1220 */ 1221 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1222 unsigned long possible_crtcs, 1223 const struct drm_plane_funcs *funcs, 1224 const uint32_t *formats, uint32_t format_count, 1225 bool is_primary) 1226 { 1227 enum drm_plane_type type; 1228 1229 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1230 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1231 formats, format_count, type); 1232 } 1233 EXPORT_SYMBOL(drm_plane_init); 1234 1235 /** 1236 * drm_plane_cleanup - Clean up the core plane usage 1237 * @plane: plane to cleanup 1238 * 1239 * This function cleans up @plane and removes it from the DRM mode setting 1240 * core. Note that the function does *not* free the plane structure itself, 1241 * this is the responsibility of the caller. 1242 */ 1243 void drm_plane_cleanup(struct drm_plane *plane) 1244 { 1245 struct drm_device *dev = plane->dev; 1246 1247 drm_modeset_lock_all(dev); 1248 kfree(plane->format_types); 1249 drm_mode_object_put(dev, &plane->base); 1250 1251 BUG_ON(list_empty(&plane->head)); 1252 1253 list_del(&plane->head); 1254 dev->mode_config.num_total_plane--; 1255 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1256 dev->mode_config.num_overlay_plane--; 1257 drm_modeset_unlock_all(dev); 1258 1259 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1260 if (plane->state && plane->funcs->atomic_destroy_state) 1261 plane->funcs->atomic_destroy_state(plane, plane->state); 1262 1263 memset(plane, 0, sizeof(*plane)); 1264 } 1265 EXPORT_SYMBOL(drm_plane_cleanup); 1266 1267 /** 1268 * drm_plane_index - find the index of a registered plane 1269 * @plane: plane to find index for 1270 * 1271 * Given a registered plane, return the index of that CRTC within a DRM 1272 * device's list of planes. 1273 */ 1274 unsigned int drm_plane_index(struct drm_plane *plane) 1275 { 1276 unsigned int index = 0; 1277 struct drm_plane *tmp; 1278 1279 list_for_each_entry(tmp, &plane->dev->mode_config.plane_list, head) { 1280 if (tmp == plane) 1281 return index; 1282 1283 index++; 1284 } 1285 1286 BUG(); 1287 } 1288 EXPORT_SYMBOL(drm_plane_index); 1289 1290 /** 1291 * drm_plane_from_index - find the registered plane at an index 1292 * @dev: DRM device 1293 * @idx: index of registered plane to find for 1294 * 1295 * Given a plane index, return the registered plane from DRM device's 1296 * list of planes with matching index. 1297 */ 1298 struct drm_plane * 1299 drm_plane_from_index(struct drm_device *dev, int idx) 1300 { 1301 struct drm_plane *plane; 1302 unsigned int i = 0; 1303 1304 list_for_each_entry(plane, &dev->mode_config.plane_list, head) { 1305 if (i == idx) 1306 return plane; 1307 i++; 1308 } 1309 return NULL; 1310 } 1311 EXPORT_SYMBOL(drm_plane_from_index); 1312 1313 /** 1314 * drm_plane_force_disable - Forcibly disable a plane 1315 * @plane: plane to disable 1316 * 1317 * Forces the plane to be disabled. 1318 * 1319 * Used when the plane's current framebuffer is destroyed, 1320 * and when restoring fbdev mode. 1321 */ 1322 void drm_plane_force_disable(struct drm_plane *plane) 1323 { 1324 int ret; 1325 1326 if (!plane->fb) 1327 return; 1328 1329 plane->old_fb = plane->fb; 1330 ret = plane->funcs->disable_plane(plane); 1331 if (ret) { 1332 DRM_ERROR("failed to disable plane with busy fb\n"); 1333 plane->old_fb = NULL; 1334 return; 1335 } 1336 /* disconnect the plane from the fb and crtc: */ 1337 drm_framebuffer_unreference(plane->old_fb); 1338 plane->old_fb = NULL; 1339 plane->fb = NULL; 1340 plane->crtc = NULL; 1341 } 1342 EXPORT_SYMBOL(drm_plane_force_disable); 1343 1344 static int drm_mode_create_standard_properties(struct drm_device *dev) 1345 { 1346 struct drm_property *prop; 1347 1348 /* 1349 * Standard properties (apply to all connectors) 1350 */ 1351 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1352 DRM_MODE_PROP_IMMUTABLE, 1353 "EDID", 0); 1354 if (!prop) 1355 return -ENOMEM; 1356 dev->mode_config.edid_property = prop; 1357 1358 prop = drm_property_create_enum(dev, 0, 1359 "DPMS", drm_dpms_enum_list, 1360 ARRAY_SIZE(drm_dpms_enum_list)); 1361 if (!prop) 1362 return -ENOMEM; 1363 dev->mode_config.dpms_property = prop; 1364 1365 prop = drm_property_create(dev, 1366 DRM_MODE_PROP_BLOB | 1367 DRM_MODE_PROP_IMMUTABLE, 1368 "PATH", 0); 1369 if (!prop) 1370 return -ENOMEM; 1371 dev->mode_config.path_property = prop; 1372 1373 prop = drm_property_create(dev, 1374 DRM_MODE_PROP_BLOB | 1375 DRM_MODE_PROP_IMMUTABLE, 1376 "TILE", 0); 1377 if (!prop) 1378 return -ENOMEM; 1379 dev->mode_config.tile_property = prop; 1380 1381 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1382 "type", drm_plane_type_enum_list, 1383 ARRAY_SIZE(drm_plane_type_enum_list)); 1384 if (!prop) 1385 return -ENOMEM; 1386 dev->mode_config.plane_type_property = prop; 1387 1388 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1389 "SRC_X", 0, UINT_MAX); 1390 if (!prop) 1391 return -ENOMEM; 1392 dev->mode_config.prop_src_x = prop; 1393 1394 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1395 "SRC_Y", 0, UINT_MAX); 1396 if (!prop) 1397 return -ENOMEM; 1398 dev->mode_config.prop_src_y = prop; 1399 1400 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1401 "SRC_W", 0, UINT_MAX); 1402 if (!prop) 1403 return -ENOMEM; 1404 dev->mode_config.prop_src_w = prop; 1405 1406 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1407 "SRC_H", 0, UINT_MAX); 1408 if (!prop) 1409 return -ENOMEM; 1410 dev->mode_config.prop_src_h = prop; 1411 1412 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1413 "CRTC_X", INT_MIN, INT_MAX); 1414 if (!prop) 1415 return -ENOMEM; 1416 dev->mode_config.prop_crtc_x = prop; 1417 1418 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1419 "CRTC_Y", INT_MIN, INT_MAX); 1420 if (!prop) 1421 return -ENOMEM; 1422 dev->mode_config.prop_crtc_y = prop; 1423 1424 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1425 "CRTC_W", 0, INT_MAX); 1426 if (!prop) 1427 return -ENOMEM; 1428 dev->mode_config.prop_crtc_w = prop; 1429 1430 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1431 "CRTC_H", 0, INT_MAX); 1432 if (!prop) 1433 return -ENOMEM; 1434 dev->mode_config.prop_crtc_h = prop; 1435 1436 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1437 "FB_ID", DRM_MODE_OBJECT_FB); 1438 if (!prop) 1439 return -ENOMEM; 1440 dev->mode_config.prop_fb_id = prop; 1441 1442 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1443 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 1444 if (!prop) 1445 return -ENOMEM; 1446 dev->mode_config.prop_crtc_id = prop; 1447 1448 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 1449 "ACTIVE"); 1450 if (!prop) 1451 return -ENOMEM; 1452 dev->mode_config.prop_active = prop; 1453 1454 prop = drm_property_create(dev, 1455 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 1456 "MODE_ID", 0); 1457 if (!prop) 1458 return -ENOMEM; 1459 dev->mode_config.prop_mode_id = prop; 1460 1461 return 0; 1462 } 1463 1464 /** 1465 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1466 * @dev: DRM device 1467 * 1468 * Called by a driver the first time a DVI-I connector is made. 1469 */ 1470 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1471 { 1472 struct drm_property *dvi_i_selector; 1473 struct drm_property *dvi_i_subconnector; 1474 1475 if (dev->mode_config.dvi_i_select_subconnector_property) 1476 return 0; 1477 1478 dvi_i_selector = 1479 drm_property_create_enum(dev, 0, 1480 "select subconnector", 1481 drm_dvi_i_select_enum_list, 1482 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1483 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1484 1485 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1486 "subconnector", 1487 drm_dvi_i_subconnector_enum_list, 1488 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1489 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1490 1491 return 0; 1492 } 1493 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1494 1495 /** 1496 * drm_create_tv_properties - create TV specific connector properties 1497 * @dev: DRM device 1498 * @num_modes: number of different TV formats (modes) supported 1499 * @modes: array of pointers to strings containing name of each format 1500 * 1501 * Called by a driver's TV initialization routine, this function creates 1502 * the TV specific connector properties for a given device. Caller is 1503 * responsible for allocating a list of format names and passing them to 1504 * this routine. 1505 */ 1506 int drm_mode_create_tv_properties(struct drm_device *dev, 1507 unsigned int num_modes, 1508 char *modes[]) 1509 { 1510 struct drm_property *tv_selector; 1511 struct drm_property *tv_subconnector; 1512 unsigned int i; 1513 1514 if (dev->mode_config.tv_select_subconnector_property) 1515 return 0; 1516 1517 /* 1518 * Basic connector properties 1519 */ 1520 tv_selector = drm_property_create_enum(dev, 0, 1521 "select subconnector", 1522 drm_tv_select_enum_list, 1523 ARRAY_SIZE(drm_tv_select_enum_list)); 1524 dev->mode_config.tv_select_subconnector_property = tv_selector; 1525 1526 tv_subconnector = 1527 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1528 "subconnector", 1529 drm_tv_subconnector_enum_list, 1530 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1531 dev->mode_config.tv_subconnector_property = tv_subconnector; 1532 1533 /* 1534 * Other, TV specific properties: margins & TV modes. 1535 */ 1536 dev->mode_config.tv_left_margin_property = 1537 drm_property_create_range(dev, 0, "left margin", 0, 100); 1538 1539 dev->mode_config.tv_right_margin_property = 1540 drm_property_create_range(dev, 0, "right margin", 0, 100); 1541 1542 dev->mode_config.tv_top_margin_property = 1543 drm_property_create_range(dev, 0, "top margin", 0, 100); 1544 1545 dev->mode_config.tv_bottom_margin_property = 1546 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1547 1548 dev->mode_config.tv_mode_property = 1549 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1550 "mode", num_modes); 1551 for (i = 0; i < num_modes; i++) 1552 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1553 i, modes[i]); 1554 1555 dev->mode_config.tv_brightness_property = 1556 drm_property_create_range(dev, 0, "brightness", 0, 100); 1557 1558 dev->mode_config.tv_contrast_property = 1559 drm_property_create_range(dev, 0, "contrast", 0, 100); 1560 1561 dev->mode_config.tv_flicker_reduction_property = 1562 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1563 1564 dev->mode_config.tv_overscan_property = 1565 drm_property_create_range(dev, 0, "overscan", 0, 100); 1566 1567 dev->mode_config.tv_saturation_property = 1568 drm_property_create_range(dev, 0, "saturation", 0, 100); 1569 1570 dev->mode_config.tv_hue_property = 1571 drm_property_create_range(dev, 0, "hue", 0, 100); 1572 1573 return 0; 1574 } 1575 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1576 1577 /** 1578 * drm_mode_create_scaling_mode_property - create scaling mode property 1579 * @dev: DRM device 1580 * 1581 * Called by a driver the first time it's needed, must be attached to desired 1582 * connectors. 1583 */ 1584 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1585 { 1586 struct drm_property *scaling_mode; 1587 1588 if (dev->mode_config.scaling_mode_property) 1589 return 0; 1590 1591 scaling_mode = 1592 drm_property_create_enum(dev, 0, "scaling mode", 1593 drm_scaling_mode_enum_list, 1594 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1595 1596 dev->mode_config.scaling_mode_property = scaling_mode; 1597 1598 return 0; 1599 } 1600 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1601 1602 /** 1603 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1604 * @dev: DRM device 1605 * 1606 * Called by a driver the first time it's needed, must be attached to desired 1607 * connectors. 1608 * 1609 * Returns: 1610 * Zero on success, negative errno on failure. 1611 */ 1612 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1613 { 1614 if (dev->mode_config.aspect_ratio_property) 1615 return 0; 1616 1617 dev->mode_config.aspect_ratio_property = 1618 drm_property_create_enum(dev, 0, "aspect ratio", 1619 drm_aspect_ratio_enum_list, 1620 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1621 1622 if (dev->mode_config.aspect_ratio_property == NULL) 1623 return -ENOMEM; 1624 1625 return 0; 1626 } 1627 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1628 1629 /** 1630 * drm_mode_create_dirty_property - create dirty property 1631 * @dev: DRM device 1632 * 1633 * Called by a driver the first time it's needed, must be attached to desired 1634 * connectors. 1635 */ 1636 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1637 { 1638 struct drm_property *dirty_info; 1639 1640 if (dev->mode_config.dirty_info_property) 1641 return 0; 1642 1643 dirty_info = 1644 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1645 "dirty", 1646 drm_dirty_info_enum_list, 1647 ARRAY_SIZE(drm_dirty_info_enum_list)); 1648 dev->mode_config.dirty_info_property = dirty_info; 1649 1650 return 0; 1651 } 1652 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1653 1654 /** 1655 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1656 * @dev: DRM device 1657 * 1658 * Create the the suggested x/y offset property for connectors. 1659 */ 1660 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1661 { 1662 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1663 return 0; 1664 1665 dev->mode_config.suggested_x_property = 1666 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1667 1668 dev->mode_config.suggested_y_property = 1669 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1670 1671 if (dev->mode_config.suggested_x_property == NULL || 1672 dev->mode_config.suggested_y_property == NULL) 1673 return -ENOMEM; 1674 return 0; 1675 } 1676 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1677 1678 static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group) 1679 { 1680 uint32_t total_objects = 0; 1681 1682 total_objects += dev->mode_config.num_crtc; 1683 total_objects += dev->mode_config.num_connector; 1684 total_objects += dev->mode_config.num_encoder; 1685 1686 group->id_list = kcalloc(total_objects, sizeof(uint32_t), GFP_KERNEL); 1687 if (!group->id_list) 1688 return -ENOMEM; 1689 1690 group->num_crtcs = 0; 1691 group->num_connectors = 0; 1692 group->num_encoders = 0; 1693 return 0; 1694 } 1695 1696 void drm_mode_group_destroy(struct drm_mode_group *group) 1697 { 1698 kfree(group->id_list); 1699 group->id_list = NULL; 1700 } 1701 1702 /* 1703 * NOTE: Driver's shouldn't ever call drm_mode_group_init_legacy_group - it is 1704 * the drm core's responsibility to set up mode control groups. 1705 */ 1706 int drm_mode_group_init_legacy_group(struct drm_device *dev, 1707 struct drm_mode_group *group) 1708 { 1709 struct drm_crtc *crtc; 1710 struct drm_encoder *encoder; 1711 struct drm_connector *connector; 1712 int ret; 1713 1714 ret = drm_mode_group_init(dev, group); 1715 if (ret) 1716 return ret; 1717 1718 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 1719 group->id_list[group->num_crtcs++] = crtc->base.id; 1720 1721 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 1722 group->id_list[group->num_crtcs + group->num_encoders++] = 1723 encoder->base.id; 1724 1725 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1726 group->id_list[group->num_crtcs + group->num_encoders + 1727 group->num_connectors++] = connector->base.id; 1728 1729 return 0; 1730 } 1731 EXPORT_SYMBOL(drm_mode_group_init_legacy_group); 1732 1733 void drm_reinit_primary_mode_group(struct drm_device *dev) 1734 { 1735 drm_modeset_lock_all(dev); 1736 drm_mode_group_destroy(&dev->primary->mode_group); 1737 drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group); 1738 drm_modeset_unlock_all(dev); 1739 } 1740 EXPORT_SYMBOL(drm_reinit_primary_mode_group); 1741 1742 /** 1743 * drm_mode_getresources - get graphics configuration 1744 * @dev: drm device for the ioctl 1745 * @data: data pointer for the ioctl 1746 * @file_priv: drm file for the ioctl call 1747 * 1748 * Construct a set of configuration description structures and return 1749 * them to the user, including CRTC, connector and framebuffer configuration. 1750 * 1751 * Called by the user via ioctl. 1752 * 1753 * Returns: 1754 * Zero on success, negative errno on failure. 1755 */ 1756 int drm_mode_getresources(struct drm_device *dev, void *data, 1757 struct drm_file *file_priv) 1758 { 1759 struct drm_mode_card_res *card_res = data; 1760 struct list_head *lh; 1761 struct drm_framebuffer *fb; 1762 struct drm_connector *connector; 1763 struct drm_crtc *crtc; 1764 struct drm_encoder *encoder; 1765 int ret = 0; 1766 int connector_count = 0; 1767 int crtc_count = 0; 1768 int fb_count = 0; 1769 int encoder_count = 0; 1770 int copied = 0, i; 1771 uint32_t __user *fb_id; 1772 uint32_t __user *crtc_id; 1773 uint32_t __user *connector_id; 1774 uint32_t __user *encoder_id; 1775 struct drm_mode_group *mode_group; 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 if (!drm_is_primary_client(file_priv)) { 1809 1810 mode_group = NULL; 1811 list_for_each(lh, &dev->mode_config.crtc_list) 1812 crtc_count++; 1813 1814 list_for_each(lh, &dev->mode_config.connector_list) 1815 connector_count++; 1816 1817 list_for_each(lh, &dev->mode_config.encoder_list) 1818 encoder_count++; 1819 #if 0 1820 } else { 1821 1822 mode_group = &file_priv->master->minor->mode_group; 1823 crtc_count = mode_group->num_crtcs; 1824 connector_count = mode_group->num_connectors; 1825 encoder_count = mode_group->num_encoders; 1826 #endif 1827 } 1828 1829 card_res->max_height = dev->mode_config.max_height; 1830 card_res->min_height = dev->mode_config.min_height; 1831 card_res->max_width = dev->mode_config.max_width; 1832 card_res->min_width = dev->mode_config.min_width; 1833 1834 /* CRTCs */ 1835 if (card_res->count_crtcs >= crtc_count) { 1836 copied = 0; 1837 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1838 if (!mode_group) { 1839 list_for_each_entry(crtc, &dev->mode_config.crtc_list, 1840 head) { 1841 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 1842 if (put_user(crtc->base.id, crtc_id + copied)) { 1843 ret = -EFAULT; 1844 goto out; 1845 } 1846 copied++; 1847 } 1848 } else { 1849 for (i = 0; i < mode_group->num_crtcs; i++) { 1850 if (put_user(mode_group->id_list[i], 1851 crtc_id + copied)) { 1852 ret = -EFAULT; 1853 goto out; 1854 } 1855 copied++; 1856 } 1857 } 1858 } 1859 card_res->count_crtcs = crtc_count; 1860 1861 /* Encoders */ 1862 if (card_res->count_encoders >= encoder_count) { 1863 copied = 0; 1864 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1865 if (!mode_group) { 1866 list_for_each_entry(encoder, 1867 &dev->mode_config.encoder_list, 1868 head) { 1869 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1870 encoder->name); 1871 if (put_user(encoder->base.id, encoder_id + 1872 copied)) { 1873 ret = -EFAULT; 1874 goto out; 1875 } 1876 copied++; 1877 } 1878 } else { 1879 for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) { 1880 if (put_user(mode_group->id_list[i], 1881 encoder_id + copied)) { 1882 ret = -EFAULT; 1883 goto out; 1884 } 1885 copied++; 1886 } 1887 1888 } 1889 } 1890 card_res->count_encoders = encoder_count; 1891 1892 /* Connectors */ 1893 if (card_res->count_connectors >= connector_count) { 1894 copied = 0; 1895 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1896 if (!mode_group) { 1897 list_for_each_entry(connector, 1898 &dev->mode_config.connector_list, 1899 head) { 1900 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1901 connector->base.id, 1902 connector->name); 1903 if (put_user(connector->base.id, 1904 connector_id + copied)) { 1905 ret = -EFAULT; 1906 goto out; 1907 } 1908 copied++; 1909 } 1910 } else { 1911 int start = mode_group->num_crtcs + 1912 mode_group->num_encoders; 1913 for (i = start; i < start + mode_group->num_connectors; i++) { 1914 if (put_user(mode_group->id_list[i], 1915 connector_id + copied)) { 1916 ret = -EFAULT; 1917 goto out; 1918 } 1919 copied++; 1920 } 1921 } 1922 } 1923 card_res->count_connectors = connector_count; 1924 1925 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1926 card_res->count_connectors, card_res->count_encoders); 1927 1928 out: 1929 mutex_unlock(&dev->mode_config.mutex); 1930 return ret; 1931 } 1932 1933 /** 1934 * drm_mode_getcrtc - get CRTC configuration 1935 * @dev: drm device for the ioctl 1936 * @data: data pointer for the ioctl 1937 * @file_priv: drm file for the ioctl call 1938 * 1939 * Construct a CRTC configuration structure to return to the user. 1940 * 1941 * Called by the user via ioctl. 1942 * 1943 * Returns: 1944 * Zero on success, negative errno on failure. 1945 */ 1946 int drm_mode_getcrtc(struct drm_device *dev, 1947 void *data, struct drm_file *file_priv) 1948 { 1949 struct drm_mode_crtc *crtc_resp = data; 1950 struct drm_crtc *crtc; 1951 1952 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1953 return -EINVAL; 1954 1955 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 1956 if (!crtc) 1957 return -ENOENT; 1958 1959 drm_modeset_lock_crtc(crtc, crtc->primary); 1960 crtc_resp->gamma_size = crtc->gamma_size; 1961 if (crtc->primary->fb) 1962 crtc_resp->fb_id = crtc->primary->fb->base.id; 1963 else 1964 crtc_resp->fb_id = 0; 1965 1966 if (crtc->state) { 1967 crtc_resp->x = crtc->primary->state->src_x >> 16; 1968 crtc_resp->y = crtc->primary->state->src_y >> 16; 1969 if (crtc->state->enable) { 1970 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); 1971 crtc_resp->mode_valid = 1; 1972 1973 } else { 1974 crtc_resp->mode_valid = 0; 1975 } 1976 } else { 1977 crtc_resp->x = crtc->x; 1978 crtc_resp->y = crtc->y; 1979 if (crtc->enabled) { 1980 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); 1981 crtc_resp->mode_valid = 1; 1982 1983 } else { 1984 crtc_resp->mode_valid = 0; 1985 } 1986 } 1987 drm_modeset_unlock_crtc(crtc); 1988 1989 return 0; 1990 } 1991 1992 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 1993 const struct drm_file *file_priv) 1994 { 1995 /* 1996 * If user-space hasn't configured the driver to expose the stereo 3D 1997 * modes, don't expose them. 1998 */ 1999 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 2000 return false; 2001 2002 return true; 2003 } 2004 2005 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 2006 { 2007 /* For atomic drivers only state objects are synchronously updated and 2008 * protected by modeset locks, so check those first. */ 2009 if (connector->state) 2010 return connector->state->best_encoder; 2011 return connector->encoder; 2012 } 2013 2014 /* helper for getconnector and getproperties ioctls */ 2015 static int get_properties(struct drm_mode_object *obj, bool atomic, 2016 uint32_t __user *prop_ptr, uint64_t __user *prop_values, 2017 uint32_t *arg_count_props) 2018 { 2019 int props_count; 2020 int i, ret, copied; 2021 2022 props_count = obj->properties->count; 2023 if (!atomic) 2024 props_count -= obj->properties->atomic_count; 2025 2026 if ((*arg_count_props >= props_count) && props_count) { 2027 for (i = 0, copied = 0; copied < props_count; i++) { 2028 struct drm_property *prop = obj->properties->properties[i]; 2029 uint64_t val; 2030 2031 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) 2032 continue; 2033 2034 ret = drm_object_property_get_value(obj, prop, &val); 2035 if (ret) 2036 return ret; 2037 2038 if (put_user(prop->base.id, prop_ptr + copied)) 2039 return -EFAULT; 2040 2041 if (put_user(val, prop_values + copied)) 2042 return -EFAULT; 2043 2044 copied++; 2045 } 2046 } 2047 *arg_count_props = props_count; 2048 2049 return 0; 2050 } 2051 2052 /** 2053 * drm_mode_getconnector - get connector configuration 2054 * @dev: drm device for the ioctl 2055 * @data: data pointer for the ioctl 2056 * @file_priv: drm file for the ioctl call 2057 * 2058 * Construct a connector configuration structure to return to the user. 2059 * 2060 * Called by the user via ioctl. 2061 * 2062 * Returns: 2063 * Zero on success, negative errno on failure. 2064 */ 2065 int drm_mode_getconnector(struct drm_device *dev, void *data, 2066 struct drm_file *file_priv) 2067 { 2068 struct drm_mode_get_connector *out_resp = data; 2069 struct drm_connector *connector; 2070 struct drm_encoder *encoder; 2071 struct drm_display_mode *mode; 2072 int mode_count = 0; 2073 int encoders_count = 0; 2074 int ret = 0; 2075 int copied = 0; 2076 int i; 2077 struct drm_mode_modeinfo u_mode; 2078 struct drm_mode_modeinfo __user *mode_ptr; 2079 uint32_t __user *encoder_ptr; 2080 2081 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2082 return -EINVAL; 2083 2084 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2085 2086 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 2087 2088 mutex_lock(&dev->mode_config.mutex); 2089 2090 connector = drm_connector_find(dev, out_resp->connector_id); 2091 if (!connector) { 2092 ret = -ENOENT; 2093 goto out_unlock; 2094 } 2095 2096 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) 2097 if (connector->encoder_ids[i] != 0) 2098 encoders_count++; 2099 2100 if (out_resp->count_modes == 0) { 2101 connector->funcs->fill_modes(connector, 2102 dev->mode_config.max_width, 2103 dev->mode_config.max_height); 2104 } 2105 2106 /* delayed so we get modes regardless of pre-fill_modes state */ 2107 list_for_each_entry(mode, &connector->modes, head) 2108 if (drm_mode_expose_to_userspace(mode, file_priv)) 2109 mode_count++; 2110 2111 out_resp->connector_id = connector->base.id; 2112 out_resp->connector_type = connector->connector_type; 2113 out_resp->connector_type_id = connector->connector_type_id; 2114 out_resp->mm_width = connector->display_info.width_mm; 2115 out_resp->mm_height = connector->display_info.height_mm; 2116 out_resp->subpixel = connector->display_info.subpixel_order; 2117 out_resp->connection = connector->status; 2118 2119 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2120 encoder = drm_connector_get_encoder(connector); 2121 if (encoder) 2122 out_resp->encoder_id = encoder->base.id; 2123 else 2124 out_resp->encoder_id = 0; 2125 2126 /* 2127 * This ioctl is called twice, once to determine how much space is 2128 * needed, and the 2nd time to fill it. 2129 */ 2130 if ((out_resp->count_modes >= mode_count) && mode_count) { 2131 copied = 0; 2132 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2133 list_for_each_entry(mode, &connector->modes, head) { 2134 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2135 continue; 2136 2137 drm_mode_convert_to_umode(&u_mode, mode); 2138 if (copy_to_user(mode_ptr + copied, 2139 &u_mode, sizeof(u_mode))) { 2140 ret = -EFAULT; 2141 goto out; 2142 } 2143 copied++; 2144 } 2145 } 2146 out_resp->count_modes = mode_count; 2147 2148 ret = get_properties(&connector->base, file_priv->atomic, 2149 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2150 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2151 &out_resp->count_props); 2152 if (ret) 2153 goto out; 2154 2155 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2156 copied = 0; 2157 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2158 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2159 if (connector->encoder_ids[i] != 0) { 2160 if (put_user(connector->encoder_ids[i], 2161 encoder_ptr + copied)) { 2162 ret = -EFAULT; 2163 goto out; 2164 } 2165 copied++; 2166 } 2167 } 2168 } 2169 out_resp->count_encoders = encoders_count; 2170 2171 out: 2172 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2173 2174 out_unlock: 2175 mutex_unlock(&dev->mode_config.mutex); 2176 2177 return ret; 2178 } 2179 2180 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2181 { 2182 struct drm_connector *connector; 2183 struct drm_device *dev = encoder->dev; 2184 bool uses_atomic = false; 2185 2186 /* For atomic drivers only state objects are synchronously updated and 2187 * protected by modeset locks, so check those first. */ 2188 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 2189 if (!connector->state) 2190 continue; 2191 2192 uses_atomic = true; 2193 2194 if (connector->state->best_encoder != encoder) 2195 continue; 2196 2197 return connector->state->crtc; 2198 } 2199 2200 /* Don't return stale data (e.g. pending async disable). */ 2201 if (uses_atomic) 2202 return NULL; 2203 2204 return encoder->crtc; 2205 } 2206 2207 /** 2208 * drm_mode_getencoder - get encoder configuration 2209 * @dev: drm device for the ioctl 2210 * @data: data pointer for the ioctl 2211 * @file_priv: drm file for the ioctl call 2212 * 2213 * Construct a encoder configuration structure to return to the user. 2214 * 2215 * Called by the user via ioctl. 2216 * 2217 * Returns: 2218 * Zero on success, negative errno on failure. 2219 */ 2220 int drm_mode_getencoder(struct drm_device *dev, void *data, 2221 struct drm_file *file_priv) 2222 { 2223 struct drm_mode_get_encoder *enc_resp = data; 2224 struct drm_encoder *encoder; 2225 struct drm_crtc *crtc; 2226 2227 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2228 return -EINVAL; 2229 2230 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2231 if (!encoder) 2232 return -ENOENT; 2233 2234 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2235 crtc = drm_encoder_get_crtc(encoder); 2236 if (crtc) 2237 enc_resp->crtc_id = crtc->base.id; 2238 else 2239 enc_resp->crtc_id = 0; 2240 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2241 2242 enc_resp->encoder_type = encoder->encoder_type; 2243 enc_resp->encoder_id = encoder->base.id; 2244 enc_resp->possible_crtcs = encoder->possible_crtcs; 2245 enc_resp->possible_clones = encoder->possible_clones; 2246 2247 return 0; 2248 } 2249 2250 /** 2251 * drm_mode_getplane_res - enumerate all plane resources 2252 * @dev: DRM device 2253 * @data: ioctl data 2254 * @file_priv: DRM file info 2255 * 2256 * Construct a list of plane ids to return to the user. 2257 * 2258 * Called by the user via ioctl. 2259 * 2260 * Returns: 2261 * Zero on success, negative errno on failure. 2262 */ 2263 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2264 struct drm_file *file_priv) 2265 { 2266 struct drm_mode_get_plane_res *plane_resp = data; 2267 struct drm_mode_config *config; 2268 struct drm_plane *plane; 2269 uint32_t __user *plane_ptr; 2270 int copied = 0; 2271 unsigned num_planes; 2272 2273 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2274 return -EINVAL; 2275 2276 config = &dev->mode_config; 2277 2278 if (file_priv->universal_planes) 2279 num_planes = config->num_total_plane; 2280 else 2281 num_planes = config->num_overlay_plane; 2282 2283 /* 2284 * This ioctl is called twice, once to determine how much space is 2285 * needed, and the 2nd time to fill it. 2286 */ 2287 if (num_planes && 2288 (plane_resp->count_planes >= num_planes)) { 2289 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2290 2291 /* Plane lists are invariant, no locking needed. */ 2292 list_for_each_entry(plane, &config->plane_list, head) { 2293 /* 2294 * Unless userspace set the 'universal planes' 2295 * capability bit, only advertise overlays. 2296 */ 2297 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2298 !file_priv->universal_planes) 2299 continue; 2300 2301 if (put_user(plane->base.id, plane_ptr + copied)) 2302 return -EFAULT; 2303 copied++; 2304 } 2305 } 2306 plane_resp->count_planes = num_planes; 2307 2308 return 0; 2309 } 2310 2311 /** 2312 * drm_mode_getplane - get plane configuration 2313 * @dev: DRM device 2314 * @data: ioctl data 2315 * @file_priv: DRM file info 2316 * 2317 * Construct a plane configuration structure to return to the user. 2318 * 2319 * Called by the user via ioctl. 2320 * 2321 * Returns: 2322 * Zero on success, negative errno on failure. 2323 */ 2324 int drm_mode_getplane(struct drm_device *dev, void *data, 2325 struct drm_file *file_priv) 2326 { 2327 struct drm_mode_get_plane *plane_resp = data; 2328 struct drm_plane *plane; 2329 uint32_t __user *format_ptr; 2330 2331 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2332 return -EINVAL; 2333 2334 plane = drm_plane_find(dev, plane_resp->plane_id); 2335 if (!plane) 2336 return -ENOENT; 2337 2338 drm_modeset_lock(&plane->mutex, NULL); 2339 if (plane->crtc) 2340 plane_resp->crtc_id = plane->crtc->base.id; 2341 else 2342 plane_resp->crtc_id = 0; 2343 2344 if (plane->fb) 2345 plane_resp->fb_id = plane->fb->base.id; 2346 else 2347 plane_resp->fb_id = 0; 2348 drm_modeset_unlock(&plane->mutex); 2349 2350 plane_resp->plane_id = plane->base.id; 2351 plane_resp->possible_crtcs = plane->possible_crtcs; 2352 plane_resp->gamma_size = 0; 2353 2354 /* 2355 * This ioctl is called twice, once to determine how much space is 2356 * needed, and the 2nd time to fill it. 2357 */ 2358 if (plane->format_count && 2359 (plane_resp->count_format_types >= plane->format_count)) { 2360 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2361 if (copy_to_user(format_ptr, 2362 plane->format_types, 2363 sizeof(uint32_t) * plane->format_count)) { 2364 return -EFAULT; 2365 } 2366 } 2367 plane_resp->count_format_types = plane->format_count; 2368 2369 return 0; 2370 } 2371 2372 /** 2373 * drm_plane_check_pixel_format - Check if the plane supports the pixel format 2374 * @plane: plane to check for format support 2375 * @format: the pixel format 2376 * 2377 * Returns: 2378 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL 2379 * otherwise. 2380 */ 2381 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format) 2382 { 2383 unsigned int i; 2384 2385 for (i = 0; i < plane->format_count; i++) { 2386 if (format == plane->format_types[i]) 2387 return 0; 2388 } 2389 2390 return -EINVAL; 2391 } 2392 2393 /* 2394 * setplane_internal - setplane handler for internal callers 2395 * 2396 * Note that we assume an extra reference has already been taken on fb. If the 2397 * update fails, this reference will be dropped before return; if it succeeds, 2398 * the previous framebuffer (if any) will be unreferenced instead. 2399 * 2400 * src_{x,y,w,h} are provided in 16.16 fixed point format 2401 */ 2402 static int __setplane_internal(struct drm_plane *plane, 2403 struct drm_crtc *crtc, 2404 struct drm_framebuffer *fb, 2405 int32_t crtc_x, int32_t crtc_y, 2406 uint32_t crtc_w, uint32_t crtc_h, 2407 /* src_{x,y,w,h} values are 16.16 fixed point */ 2408 uint32_t src_x, uint32_t src_y, 2409 uint32_t src_w, uint32_t src_h) 2410 { 2411 int ret = 0; 2412 unsigned int fb_width, fb_height; 2413 2414 /* No fb means shut it down */ 2415 if (!fb) { 2416 plane->old_fb = plane->fb; 2417 ret = plane->funcs->disable_plane(plane); 2418 if (!ret) { 2419 plane->crtc = NULL; 2420 plane->fb = NULL; 2421 } else { 2422 plane->old_fb = NULL; 2423 } 2424 goto out; 2425 } 2426 2427 /* Check whether this plane is usable on this CRTC */ 2428 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2429 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2430 ret = -EINVAL; 2431 goto out; 2432 } 2433 2434 /* Check whether this plane supports the fb pixel format. */ 2435 ret = drm_plane_check_pixel_format(plane, fb->pixel_format); 2436 if (ret) { 2437 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2438 drm_get_format_name(fb->pixel_format)); 2439 goto out; 2440 } 2441 2442 /* Give drivers some help against integer overflows */ 2443 if (crtc_w > INT_MAX || 2444 crtc_x > INT_MAX - (int32_t) crtc_w || 2445 crtc_h > INT_MAX || 2446 crtc_y > INT_MAX - (int32_t) crtc_h) { 2447 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2448 crtc_w, crtc_h, crtc_x, crtc_y); 2449 return -ERANGE; 2450 } 2451 2452 2453 fb_width = fb->width << 16; 2454 fb_height = fb->height << 16; 2455 2456 /* Make sure source coordinates are inside the fb. */ 2457 if (src_w > fb_width || 2458 src_x > fb_width - src_w || 2459 src_h > fb_height || 2460 src_y > fb_height - src_h) { 2461 DRM_DEBUG_KMS("Invalid source coordinates " 2462 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2463 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2464 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2465 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2466 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2467 ret = -ENOSPC; 2468 goto out; 2469 } 2470 2471 plane->old_fb = plane->fb; 2472 ret = plane->funcs->update_plane(plane, crtc, fb, 2473 crtc_x, crtc_y, crtc_w, crtc_h, 2474 src_x, src_y, src_w, src_h); 2475 if (!ret) { 2476 plane->crtc = crtc; 2477 plane->fb = fb; 2478 fb = NULL; 2479 } else { 2480 plane->old_fb = NULL; 2481 } 2482 2483 out: 2484 if (fb) 2485 drm_framebuffer_unreference(fb); 2486 if (plane->old_fb) 2487 drm_framebuffer_unreference(plane->old_fb); 2488 plane->old_fb = NULL; 2489 2490 return ret; 2491 } 2492 2493 static int setplane_internal(struct drm_plane *plane, 2494 struct drm_crtc *crtc, 2495 struct drm_framebuffer *fb, 2496 int32_t crtc_x, int32_t crtc_y, 2497 uint32_t crtc_w, uint32_t crtc_h, 2498 /* src_{x,y,w,h} values are 16.16 fixed point */ 2499 uint32_t src_x, uint32_t src_y, 2500 uint32_t src_w, uint32_t src_h) 2501 { 2502 int ret; 2503 2504 drm_modeset_lock_all(plane->dev); 2505 ret = __setplane_internal(plane, crtc, fb, 2506 crtc_x, crtc_y, crtc_w, crtc_h, 2507 src_x, src_y, src_w, src_h); 2508 drm_modeset_unlock_all(plane->dev); 2509 2510 return ret; 2511 } 2512 2513 /** 2514 * drm_mode_setplane - configure a plane's configuration 2515 * @dev: DRM device 2516 * @data: ioctl data* 2517 * @file_priv: DRM file info 2518 * 2519 * Set plane configuration, including placement, fb, scaling, and other factors. 2520 * Or pass a NULL fb to disable (planes may be disabled without providing a 2521 * valid crtc). 2522 * 2523 * Returns: 2524 * Zero on success, negative errno on failure. 2525 */ 2526 int drm_mode_setplane(struct drm_device *dev, void *data, 2527 struct drm_file *file_priv) 2528 { 2529 struct drm_mode_set_plane *plane_req = data; 2530 struct drm_plane *plane; 2531 struct drm_crtc *crtc = NULL; 2532 struct drm_framebuffer *fb = NULL; 2533 2534 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2535 return -EINVAL; 2536 2537 /* 2538 * First, find the plane, crtc, and fb objects. If not available, 2539 * we don't bother to call the driver. 2540 */ 2541 plane = drm_plane_find(dev, plane_req->plane_id); 2542 if (!plane) { 2543 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2544 plane_req->plane_id); 2545 return -ENOENT; 2546 } 2547 2548 if (plane_req->fb_id) { 2549 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2550 if (!fb) { 2551 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2552 plane_req->fb_id); 2553 return -ENOENT; 2554 } 2555 2556 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2557 if (!crtc) { 2558 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2559 plane_req->crtc_id); 2560 return -ENOENT; 2561 } 2562 } 2563 2564 /* 2565 * setplane_internal will take care of deref'ing either the old or new 2566 * framebuffer depending on success. 2567 */ 2568 return setplane_internal(plane, crtc, fb, 2569 plane_req->crtc_x, plane_req->crtc_y, 2570 plane_req->crtc_w, plane_req->crtc_h, 2571 plane_req->src_x, plane_req->src_y, 2572 plane_req->src_w, plane_req->src_h); 2573 } 2574 2575 /** 2576 * drm_mode_set_config_internal - helper to call ->set_config 2577 * @set: modeset config to set 2578 * 2579 * This is a little helper to wrap internal calls to the ->set_config driver 2580 * interface. The only thing it adds is correct refcounting dance. 2581 * 2582 * Returns: 2583 * Zero on success, negative errno on failure. 2584 */ 2585 int drm_mode_set_config_internal(struct drm_mode_set *set) 2586 { 2587 struct drm_crtc *crtc = set->crtc; 2588 struct drm_framebuffer *fb; 2589 struct drm_crtc *tmp; 2590 int ret; 2591 2592 /* 2593 * NOTE: ->set_config can also disable other crtcs (if we steal all 2594 * connectors from it), hence we need to refcount the fbs across all 2595 * crtcs. Atomic modeset will have saner semantics ... 2596 */ 2597 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) 2598 tmp->primary->old_fb = tmp->primary->fb; 2599 2600 fb = set->fb; 2601 2602 ret = crtc->funcs->set_config(set); 2603 if (ret == 0) { 2604 crtc->primary->crtc = crtc; 2605 crtc->primary->fb = fb; 2606 } 2607 2608 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { 2609 if (tmp->primary->fb) 2610 drm_framebuffer_reference(tmp->primary->fb); 2611 if (tmp->primary->old_fb) 2612 drm_framebuffer_unreference(tmp->primary->old_fb); 2613 tmp->primary->old_fb = NULL; 2614 } 2615 2616 return ret; 2617 } 2618 EXPORT_SYMBOL(drm_mode_set_config_internal); 2619 2620 /** 2621 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode 2622 * @mode: mode to query 2623 * @hdisplay: hdisplay value to fill in 2624 * @vdisplay: vdisplay value to fill in 2625 * 2626 * The vdisplay value will be doubled if the specified mode is a stereo mode of 2627 * the appropriate layout. 2628 */ 2629 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, 2630 int *hdisplay, int *vdisplay) 2631 { 2632 struct drm_display_mode adjusted; 2633 2634 drm_mode_copy(&adjusted, mode); 2635 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 2636 *hdisplay = adjusted.crtc_hdisplay; 2637 *vdisplay = adjusted.crtc_vdisplay; 2638 } 2639 EXPORT_SYMBOL(drm_crtc_get_hv_timing); 2640 2641 /** 2642 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2643 * CRTC viewport 2644 * @crtc: CRTC that framebuffer will be displayed on 2645 * @x: x panning 2646 * @y: y panning 2647 * @mode: mode that framebuffer will be displayed under 2648 * @fb: framebuffer to check size of 2649 */ 2650 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2651 int x, int y, 2652 const struct drm_display_mode *mode, 2653 const struct drm_framebuffer *fb) 2654 2655 { 2656 int hdisplay, vdisplay; 2657 2658 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); 2659 2660 if (crtc->invert_dimensions) 2661 swap(hdisplay, vdisplay); 2662 2663 if (hdisplay > fb->width || 2664 vdisplay > fb->height || 2665 x > fb->width - hdisplay || 2666 y > fb->height - vdisplay) { 2667 DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n", 2668 fb->width, fb->height, hdisplay, vdisplay, x, y, 2669 crtc->invert_dimensions ? " (inverted)" : ""); 2670 return -ENOSPC; 2671 } 2672 2673 return 0; 2674 } 2675 EXPORT_SYMBOL(drm_crtc_check_viewport); 2676 2677 /** 2678 * drm_mode_setcrtc - set CRTC configuration 2679 * @dev: drm device for the ioctl 2680 * @data: data pointer for the ioctl 2681 * @file_priv: drm file for the ioctl call 2682 * 2683 * Build a new CRTC configuration based on user request. 2684 * 2685 * Called by the user via ioctl. 2686 * 2687 * Returns: 2688 * Zero on success, negative errno on failure. 2689 */ 2690 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2691 struct drm_file *file_priv) 2692 { 2693 struct drm_mode_config *config = &dev->mode_config; 2694 struct drm_mode_crtc *crtc_req = data; 2695 struct drm_crtc *crtc; 2696 struct drm_connector **connector_set = NULL, *connector; 2697 struct drm_framebuffer *fb = NULL; 2698 struct drm_display_mode *mode = NULL; 2699 struct drm_mode_set set; 2700 uint32_t __user *set_connectors_ptr; 2701 int ret; 2702 int i; 2703 2704 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2705 return -EINVAL; 2706 2707 /* 2708 * Universal plane src offsets are only 16.16, prevent havoc for 2709 * drivers using universal plane code internally. 2710 */ 2711 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) 2712 return -ERANGE; 2713 2714 drm_modeset_lock_all(dev); 2715 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2716 if (!crtc) { 2717 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2718 ret = -ENOENT; 2719 goto out; 2720 } 2721 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 2722 2723 if (crtc_req->mode_valid) { 2724 /* If we have a mode we need a framebuffer. */ 2725 /* If we pass -1, set the mode with the currently bound fb */ 2726 if (crtc_req->fb_id == -1) { 2727 if (!crtc->primary->fb) { 2728 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2729 ret = -EINVAL; 2730 goto out; 2731 } 2732 fb = crtc->primary->fb; 2733 /* Make refcounting symmetric with the lookup path. */ 2734 drm_framebuffer_reference(fb); 2735 } else { 2736 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2737 if (!fb) { 2738 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2739 crtc_req->fb_id); 2740 ret = -ENOENT; 2741 goto out; 2742 } 2743 } 2744 2745 mode = drm_mode_create(dev); 2746 if (!mode) { 2747 ret = -ENOMEM; 2748 goto out; 2749 } 2750 2751 ret = drm_mode_convert_umode(mode, &crtc_req->mode); 2752 if (ret) { 2753 DRM_DEBUG_KMS("Invalid mode\n"); 2754 goto out; 2755 } 2756 2757 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 2758 2759 /* 2760 * Check whether the primary plane supports the fb pixel format. 2761 * Drivers not implementing the universal planes API use a 2762 * default formats list provided by the DRM core which doesn't 2763 * match real hardware capabilities. Skip the check in that 2764 * case. 2765 */ 2766 if (!crtc->primary->format_default) { 2767 ret = drm_plane_check_pixel_format(crtc->primary, 2768 fb->pixel_format); 2769 if (ret) { 2770 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2771 drm_get_format_name(fb->pixel_format)); 2772 goto out; 2773 } 2774 } 2775 2776 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2777 mode, fb); 2778 if (ret) 2779 goto out; 2780 2781 } 2782 2783 if (crtc_req->count_connectors == 0 && mode) { 2784 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2785 ret = -EINVAL; 2786 goto out; 2787 } 2788 2789 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2790 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2791 crtc_req->count_connectors); 2792 ret = -EINVAL; 2793 goto out; 2794 } 2795 2796 if (crtc_req->count_connectors > 0) { 2797 u32 out_id; 2798 2799 /* Avoid unbounded kernel memory allocation */ 2800 if (crtc_req->count_connectors > config->num_connector) { 2801 ret = -EINVAL; 2802 goto out; 2803 } 2804 2805 connector_set = kmalloc(crtc_req->count_connectors * 2806 sizeof(struct drm_connector *), 2807 M_DRM, M_WAITOK); 2808 if (!connector_set) { 2809 ret = -ENOMEM; 2810 goto out; 2811 } 2812 2813 for (i = 0; i < crtc_req->count_connectors; i++) { 2814 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2815 if (get_user(out_id, &set_connectors_ptr[i])) { 2816 ret = -EFAULT; 2817 goto out; 2818 } 2819 2820 connector = drm_connector_find(dev, out_id); 2821 if (!connector) { 2822 DRM_DEBUG_KMS("Connector id %d unknown\n", 2823 out_id); 2824 ret = -ENOENT; 2825 goto out; 2826 } 2827 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2828 connector->base.id, 2829 connector->name); 2830 2831 connector_set[i] = connector; 2832 } 2833 } 2834 2835 set.crtc = crtc; 2836 set.x = crtc_req->x; 2837 set.y = crtc_req->y; 2838 set.mode = mode; 2839 set.connectors = connector_set; 2840 set.num_connectors = crtc_req->count_connectors; 2841 set.fb = fb; 2842 ret = drm_mode_set_config_internal(&set); 2843 2844 out: 2845 if (fb) 2846 drm_framebuffer_unreference(fb); 2847 2848 kfree(connector_set); 2849 drm_mode_destroy(dev, mode); 2850 drm_modeset_unlock_all(dev); 2851 return ret; 2852 } 2853 2854 /** 2855 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2856 * universal plane handler call 2857 * @crtc: crtc to update cursor for 2858 * @req: data pointer for the ioctl 2859 * @file_priv: drm file for the ioctl call 2860 * 2861 * Legacy cursor ioctl's work directly with driver buffer handles. To 2862 * translate legacy ioctl calls into universal plane handler calls, we need to 2863 * wrap the native buffer handle in a drm_framebuffer. 2864 * 2865 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2866 * buffer with a pitch of 4*width; the universal plane interface should be used 2867 * directly in cases where the hardware can support other buffer settings and 2868 * userspace wants to make use of these capabilities. 2869 * 2870 * Returns: 2871 * Zero on success, negative errno on failure. 2872 */ 2873 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2874 struct drm_mode_cursor2 *req, 2875 struct drm_file *file_priv) 2876 { 2877 struct drm_device *dev = crtc->dev; 2878 struct drm_framebuffer *fb = NULL; 2879 struct drm_mode_fb_cmd2 fbreq = { 2880 .width = req->width, 2881 .height = req->height, 2882 .pixel_format = DRM_FORMAT_ARGB8888, 2883 .pitches = { req->width * 4 }, 2884 .handles = { req->handle }, 2885 }; 2886 int32_t crtc_x, crtc_y; 2887 uint32_t crtc_w = 0, crtc_h = 0; 2888 uint32_t src_w = 0, src_h = 0; 2889 int ret = 0; 2890 2891 BUG_ON(!crtc->cursor); 2892 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2893 2894 /* 2895 * Obtain fb we'll be using (either new or existing) and take an extra 2896 * reference to it if fb != null. setplane will take care of dropping 2897 * the reference if the plane update fails. 2898 */ 2899 if (req->flags & DRM_MODE_CURSOR_BO) { 2900 if (req->handle) { 2901 fb = internal_framebuffer_create(dev, &fbreq, file_priv); 2902 if (IS_ERR(fb)) { 2903 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2904 return PTR_ERR(fb); 2905 } 2906 } else { 2907 fb = NULL; 2908 } 2909 } else { 2910 fb = crtc->cursor->fb; 2911 if (fb) 2912 drm_framebuffer_reference(fb); 2913 } 2914 2915 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2916 crtc_x = req->x; 2917 crtc_y = req->y; 2918 } else { 2919 crtc_x = crtc->cursor_x; 2920 crtc_y = crtc->cursor_y; 2921 } 2922 2923 if (fb) { 2924 crtc_w = fb->width; 2925 crtc_h = fb->height; 2926 src_w = fb->width << 16; 2927 src_h = fb->height << 16; 2928 } 2929 2930 /* 2931 * setplane_internal will take care of deref'ing either the old or new 2932 * framebuffer depending on success. 2933 */ 2934 ret = __setplane_internal(crtc->cursor, crtc, fb, 2935 crtc_x, crtc_y, crtc_w, crtc_h, 2936 0, 0, src_w, src_h); 2937 2938 /* Update successful; save new cursor position, if necessary */ 2939 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2940 crtc->cursor_x = req->x; 2941 crtc->cursor_y = req->y; 2942 } 2943 2944 return ret; 2945 } 2946 2947 static int drm_mode_cursor_common(struct drm_device *dev, 2948 struct drm_mode_cursor2 *req, 2949 struct drm_file *file_priv) 2950 { 2951 struct drm_crtc *crtc; 2952 int ret = 0; 2953 2954 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2955 return -EINVAL; 2956 2957 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 2958 return -EINVAL; 2959 2960 crtc = drm_crtc_find(dev, req->crtc_id); 2961 if (!crtc) { 2962 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 2963 return -ENOENT; 2964 } 2965 2966 /* 2967 * If this crtc has a universal cursor plane, call that plane's update 2968 * handler rather than using legacy cursor handlers. 2969 */ 2970 drm_modeset_lock_crtc(crtc, crtc->cursor); 2971 if (crtc->cursor) { 2972 ret = drm_mode_cursor_universal(crtc, req, file_priv); 2973 goto out; 2974 } 2975 2976 if (req->flags & DRM_MODE_CURSOR_BO) { 2977 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 2978 ret = -ENXIO; 2979 goto out; 2980 } 2981 /* Turns off the cursor if handle is 0 */ 2982 if (crtc->funcs->cursor_set2) 2983 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 2984 req->width, req->height, req->hot_x, req->hot_y); 2985 else 2986 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 2987 req->width, req->height); 2988 } 2989 2990 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2991 if (crtc->funcs->cursor_move) { 2992 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 2993 } else { 2994 ret = -EFAULT; 2995 goto out; 2996 } 2997 } 2998 out: 2999 drm_modeset_unlock_crtc(crtc); 3000 3001 return ret; 3002 3003 } 3004 3005 3006 /** 3007 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 3008 * @dev: drm device for the ioctl 3009 * @data: data pointer for the ioctl 3010 * @file_priv: drm file for the ioctl call 3011 * 3012 * Set the cursor configuration based on user request. 3013 * 3014 * Called by the user via ioctl. 3015 * 3016 * Returns: 3017 * Zero on success, negative errno on failure. 3018 */ 3019 int drm_mode_cursor_ioctl(struct drm_device *dev, 3020 void *data, struct drm_file *file_priv) 3021 { 3022 struct drm_mode_cursor *req = data; 3023 struct drm_mode_cursor2 new_req; 3024 3025 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 3026 new_req.hot_x = new_req.hot_y = 0; 3027 3028 return drm_mode_cursor_common(dev, &new_req, file_priv); 3029 } 3030 3031 /** 3032 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 3033 * @dev: drm device for the ioctl 3034 * @data: data pointer for the ioctl 3035 * @file_priv: drm file for the ioctl call 3036 * 3037 * Set the cursor configuration based on user request. This implements the 2nd 3038 * version of the cursor ioctl, which allows userspace to additionally specify 3039 * the hotspot of the pointer. 3040 * 3041 * Called by the user via ioctl. 3042 * 3043 * Returns: 3044 * Zero on success, negative errno on failure. 3045 */ 3046 int drm_mode_cursor2_ioctl(struct drm_device *dev, 3047 void *data, struct drm_file *file_priv) 3048 { 3049 struct drm_mode_cursor2 *req = data; 3050 3051 return drm_mode_cursor_common(dev, req, file_priv); 3052 } 3053 3054 /** 3055 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 3056 * @bpp: bits per pixels 3057 * @depth: bit depth per pixel 3058 * 3059 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 3060 * Useful in fbdev emulation code, since that deals in those values. 3061 */ 3062 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 3063 { 3064 uint32_t fmt; 3065 3066 switch (bpp) { 3067 case 8: 3068 fmt = DRM_FORMAT_C8; 3069 break; 3070 case 16: 3071 if (depth == 15) 3072 fmt = DRM_FORMAT_XRGB1555; 3073 else 3074 fmt = DRM_FORMAT_RGB565; 3075 break; 3076 case 24: 3077 fmt = DRM_FORMAT_RGB888; 3078 break; 3079 case 32: 3080 if (depth == 24) 3081 fmt = DRM_FORMAT_XRGB8888; 3082 else if (depth == 30) 3083 fmt = DRM_FORMAT_XRGB2101010; 3084 else 3085 fmt = DRM_FORMAT_ARGB8888; 3086 break; 3087 default: 3088 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3089 fmt = DRM_FORMAT_XRGB8888; 3090 break; 3091 } 3092 3093 return fmt; 3094 } 3095 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3096 3097 /** 3098 * drm_mode_addfb - add an FB to the graphics configuration 3099 * @dev: drm device for the ioctl 3100 * @data: data pointer for the ioctl 3101 * @file_priv: drm file for the ioctl call 3102 * 3103 * Add a new FB to the specified CRTC, given a user request. This is the 3104 * original addfb ioctl which only supported RGB formats. 3105 * 3106 * Called by the user via ioctl. 3107 * 3108 * Returns: 3109 * Zero on success, negative errno on failure. 3110 */ 3111 int drm_mode_addfb(struct drm_device *dev, 3112 void *data, struct drm_file *file_priv) 3113 { 3114 struct drm_mode_fb_cmd *or = data; 3115 struct drm_mode_fb_cmd2 r = {}; 3116 int ret; 3117 3118 /* convert to new format and call new ioctl */ 3119 r.fb_id = or->fb_id; 3120 r.width = or->width; 3121 r.height = or->height; 3122 r.pitches[0] = or->pitch; 3123 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3124 r.handles[0] = or->handle; 3125 3126 ret = drm_mode_addfb2(dev, &r, file_priv); 3127 if (ret) 3128 return ret; 3129 3130 or->fb_id = r.fb_id; 3131 3132 return ret; 3133 } 3134 3135 static int format_check(const struct drm_mode_fb_cmd2 *r) 3136 { 3137 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3138 3139 switch (format) { 3140 case DRM_FORMAT_C8: 3141 case DRM_FORMAT_RGB332: 3142 case DRM_FORMAT_BGR233: 3143 case DRM_FORMAT_XRGB4444: 3144 case DRM_FORMAT_XBGR4444: 3145 case DRM_FORMAT_RGBX4444: 3146 case DRM_FORMAT_BGRX4444: 3147 case DRM_FORMAT_ARGB4444: 3148 case DRM_FORMAT_ABGR4444: 3149 case DRM_FORMAT_RGBA4444: 3150 case DRM_FORMAT_BGRA4444: 3151 case DRM_FORMAT_XRGB1555: 3152 case DRM_FORMAT_XBGR1555: 3153 case DRM_FORMAT_RGBX5551: 3154 case DRM_FORMAT_BGRX5551: 3155 case DRM_FORMAT_ARGB1555: 3156 case DRM_FORMAT_ABGR1555: 3157 case DRM_FORMAT_RGBA5551: 3158 case DRM_FORMAT_BGRA5551: 3159 case DRM_FORMAT_RGB565: 3160 case DRM_FORMAT_BGR565: 3161 case DRM_FORMAT_RGB888: 3162 case DRM_FORMAT_BGR888: 3163 case DRM_FORMAT_XRGB8888: 3164 case DRM_FORMAT_XBGR8888: 3165 case DRM_FORMAT_RGBX8888: 3166 case DRM_FORMAT_BGRX8888: 3167 case DRM_FORMAT_ARGB8888: 3168 case DRM_FORMAT_ABGR8888: 3169 case DRM_FORMAT_RGBA8888: 3170 case DRM_FORMAT_BGRA8888: 3171 case DRM_FORMAT_XRGB2101010: 3172 case DRM_FORMAT_XBGR2101010: 3173 case DRM_FORMAT_RGBX1010102: 3174 case DRM_FORMAT_BGRX1010102: 3175 case DRM_FORMAT_ARGB2101010: 3176 case DRM_FORMAT_ABGR2101010: 3177 case DRM_FORMAT_RGBA1010102: 3178 case DRM_FORMAT_BGRA1010102: 3179 case DRM_FORMAT_YUYV: 3180 case DRM_FORMAT_YVYU: 3181 case DRM_FORMAT_UYVY: 3182 case DRM_FORMAT_VYUY: 3183 case DRM_FORMAT_AYUV: 3184 case DRM_FORMAT_NV12: 3185 case DRM_FORMAT_NV21: 3186 case DRM_FORMAT_NV16: 3187 case DRM_FORMAT_NV61: 3188 case DRM_FORMAT_NV24: 3189 case DRM_FORMAT_NV42: 3190 case DRM_FORMAT_YUV410: 3191 case DRM_FORMAT_YVU410: 3192 case DRM_FORMAT_YUV411: 3193 case DRM_FORMAT_YVU411: 3194 case DRM_FORMAT_YUV420: 3195 case DRM_FORMAT_YVU420: 3196 case DRM_FORMAT_YUV422: 3197 case DRM_FORMAT_YVU422: 3198 case DRM_FORMAT_YUV444: 3199 case DRM_FORMAT_YVU444: 3200 return 0; 3201 default: 3202 DRM_DEBUG_KMS("invalid pixel format %s\n", 3203 drm_get_format_name(r->pixel_format)); 3204 return -EINVAL; 3205 } 3206 } 3207 3208 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3209 { 3210 int ret, hsub, vsub, num_planes, i; 3211 3212 ret = format_check(r); 3213 if (ret) { 3214 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3215 drm_get_format_name(r->pixel_format)); 3216 return ret; 3217 } 3218 3219 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3220 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3221 num_planes = drm_format_num_planes(r->pixel_format); 3222 3223 if (r->width == 0 || r->width % hsub) { 3224 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3225 return -EINVAL; 3226 } 3227 3228 if (r->height == 0 || r->height % vsub) { 3229 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3230 return -EINVAL; 3231 } 3232 3233 for (i = 0; i < num_planes; i++) { 3234 unsigned int width = r->width / (i != 0 ? hsub : 1); 3235 unsigned int height = r->height / (i != 0 ? vsub : 1); 3236 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3237 3238 if (!r->handles[i]) { 3239 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3240 return -EINVAL; 3241 } 3242 3243 if ((uint64_t) width * cpp > UINT_MAX) 3244 return -ERANGE; 3245 3246 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3247 return -ERANGE; 3248 3249 if (r->pitches[i] < width * cpp) { 3250 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3251 return -EINVAL; 3252 } 3253 3254 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { 3255 DRM_DEBUG_KMS("bad fb modifier %lu for plane %d\n", 3256 r->modifier[i], i); 3257 return -EINVAL; 3258 } 3259 3260 /* modifier specific checks: */ 3261 switch (r->modifier[i]) { 3262 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: 3263 /* NOTE: the pitch restriction may be lifted later if it turns 3264 * out that no hw has this restriction: 3265 */ 3266 if (r->pixel_format != DRM_FORMAT_NV12 || 3267 width % 128 || height % 32 || 3268 r->pitches[i] % 128) { 3269 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i); 3270 return -EINVAL; 3271 } 3272 break; 3273 3274 default: 3275 break; 3276 } 3277 } 3278 3279 for (i = num_planes; i < 4; i++) { 3280 if (r->modifier[i]) { 3281 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i); 3282 return -EINVAL; 3283 } 3284 3285 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ 3286 if (!(r->flags & DRM_MODE_FB_MODIFIERS)) 3287 continue; 3288 3289 if (r->handles[i]) { 3290 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i); 3291 return -EINVAL; 3292 } 3293 3294 if (r->pitches[i]) { 3295 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i); 3296 return -EINVAL; 3297 } 3298 3299 if (r->offsets[i]) { 3300 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i); 3301 return -EINVAL; 3302 } 3303 } 3304 3305 return 0; 3306 } 3307 3308 static struct drm_framebuffer * 3309 internal_framebuffer_create(struct drm_device *dev, 3310 struct drm_mode_fb_cmd2 *r, 3311 struct drm_file *file_priv) 3312 { 3313 struct drm_mode_config *config = &dev->mode_config; 3314 struct drm_framebuffer *fb; 3315 int ret; 3316 3317 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { 3318 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3319 return ERR_PTR(-EINVAL); 3320 } 3321 3322 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3323 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3324 r->width, config->min_width, config->max_width); 3325 return ERR_PTR(-EINVAL); 3326 } 3327 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3328 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3329 r->height, config->min_height, config->max_height); 3330 return ERR_PTR(-EINVAL); 3331 } 3332 3333 if (r->flags & DRM_MODE_FB_MODIFIERS && 3334 !dev->mode_config.allow_fb_modifiers) { 3335 DRM_DEBUG_KMS("driver does not support fb modifiers\n"); 3336 return ERR_PTR(-EINVAL); 3337 } 3338 3339 ret = framebuffer_check(r); 3340 if (ret) 3341 return ERR_PTR(ret); 3342 3343 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3344 if (IS_ERR(fb)) { 3345 DRM_DEBUG_KMS("could not create framebuffer\n"); 3346 return fb; 3347 } 3348 3349 return fb; 3350 } 3351 3352 /** 3353 * drm_mode_addfb2 - add an FB to the graphics configuration 3354 * @dev: drm device for the ioctl 3355 * @data: data pointer for the ioctl 3356 * @file_priv: drm file for the ioctl call 3357 * 3358 * Add a new FB to the specified CRTC, given a user request with format. This is 3359 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3360 * and uses fourcc codes as pixel format specifiers. 3361 * 3362 * Called by the user via ioctl. 3363 * 3364 * Returns: 3365 * Zero on success, negative errno on failure. 3366 */ 3367 int drm_mode_addfb2(struct drm_device *dev, 3368 void *data, struct drm_file *file_priv) 3369 { 3370 struct drm_mode_fb_cmd2 *r = data; 3371 struct drm_framebuffer *fb; 3372 3373 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3374 return -EINVAL; 3375 3376 fb = internal_framebuffer_create(dev, r, file_priv); 3377 if (IS_ERR(fb)) 3378 return PTR_ERR(fb); 3379 3380 /* Transfer ownership to the filp for reaping on close */ 3381 3382 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3383 mutex_lock(&file_priv->fbs_lock); 3384 r->fb_id = fb->base.id; 3385 list_add(&fb->filp_head, &file_priv->fbs); 3386 mutex_unlock(&file_priv->fbs_lock); 3387 3388 return 0; 3389 } 3390 3391 /** 3392 * drm_mode_rmfb - remove an FB from the configuration 3393 * @dev: drm device for the ioctl 3394 * @data: data pointer for the ioctl 3395 * @file_priv: drm file for the ioctl call 3396 * 3397 * Remove the FB specified by the user. 3398 * 3399 * Called by the user via ioctl. 3400 * 3401 * Returns: 3402 * Zero on success, negative errno on failure. 3403 */ 3404 int drm_mode_rmfb(struct drm_device *dev, 3405 void *data, struct drm_file *file_priv) 3406 { 3407 struct drm_framebuffer *fb = NULL; 3408 struct drm_framebuffer *fbl = NULL; 3409 uint32_t *id = data; 3410 int found = 0; 3411 3412 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3413 return -EINVAL; 3414 3415 mutex_lock(&file_priv->fbs_lock); 3416 mutex_lock(&dev->mode_config.fb_lock); 3417 fb = __drm_framebuffer_lookup(dev, *id); 3418 if (!fb) 3419 goto fail_lookup; 3420 3421 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3422 if (fb == fbl) 3423 found = 1; 3424 if (!found) 3425 goto fail_lookup; 3426 3427 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ 3428 __drm_framebuffer_unregister(dev, fb); 3429 3430 list_del_init(&fb->filp_head); 3431 mutex_unlock(&dev->mode_config.fb_lock); 3432 mutex_unlock(&file_priv->fbs_lock); 3433 3434 drm_framebuffer_remove(fb); 3435 3436 return 0; 3437 3438 fail_lookup: 3439 mutex_unlock(&dev->mode_config.fb_lock); 3440 mutex_unlock(&file_priv->fbs_lock); 3441 3442 return -ENOENT; 3443 } 3444 3445 /** 3446 * drm_mode_getfb - get FB info 3447 * @dev: drm device for the ioctl 3448 * @data: data pointer for the ioctl 3449 * @file_priv: drm file for the ioctl call 3450 * 3451 * Lookup the FB given its ID and return info about it. 3452 * 3453 * Called by the user via ioctl. 3454 * 3455 * Returns: 3456 * Zero on success, negative errno on failure. 3457 */ 3458 int drm_mode_getfb(struct drm_device *dev, 3459 void *data, struct drm_file *file_priv) 3460 { 3461 struct drm_mode_fb_cmd *r = data; 3462 struct drm_framebuffer *fb; 3463 int ret; 3464 3465 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3466 return -EINVAL; 3467 3468 fb = drm_framebuffer_lookup(dev, r->fb_id); 3469 if (!fb) 3470 return -ENOENT; 3471 3472 r->height = fb->height; 3473 r->width = fb->width; 3474 r->depth = fb->depth; 3475 r->bpp = fb->bits_per_pixel; 3476 r->pitch = fb->pitches[0]; 3477 if (fb->funcs->create_handle) { 3478 ret = fb->funcs->create_handle(fb, file_priv, &r->handle); 3479 } else { 3480 ret = -ENODEV; 3481 } 3482 3483 drm_framebuffer_unreference(fb); 3484 3485 return ret; 3486 } 3487 3488 /** 3489 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3490 * @dev: drm device for the ioctl 3491 * @data: data pointer for the ioctl 3492 * @file_priv: drm file for the ioctl call 3493 * 3494 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3495 * rectangle list. Generic userspace which does frontbuffer rendering must call 3496 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3497 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3498 * 3499 * Modesetting drivers which always update the frontbuffer do not need to 3500 * implement the corresponding ->dirty framebuffer callback. 3501 * 3502 * Called by the user via ioctl. 3503 * 3504 * Returns: 3505 * Zero on success, negative errno on failure. 3506 */ 3507 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3508 void *data, struct drm_file *file_priv) 3509 { 3510 struct drm_clip_rect __user *clips_ptr; 3511 struct drm_clip_rect *clips = NULL; 3512 struct drm_mode_fb_dirty_cmd *r = data; 3513 struct drm_framebuffer *fb; 3514 unsigned flags; 3515 int num_clips; 3516 int ret; 3517 3518 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3519 return -EINVAL; 3520 3521 fb = drm_framebuffer_lookup(dev, r->fb_id); 3522 if (!fb) 3523 return -ENOENT; 3524 3525 num_clips = r->num_clips; 3526 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3527 3528 if (!num_clips != !clips_ptr) { 3529 ret = -EINVAL; 3530 goto out_err1; 3531 } 3532 3533 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3534 3535 /* If userspace annotates copy, clips must come in pairs */ 3536 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3537 ret = -EINVAL; 3538 goto out_err1; 3539 } 3540 3541 if (num_clips && clips_ptr) { 3542 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3543 ret = -EINVAL; 3544 goto out_err1; 3545 } 3546 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); 3547 if (!clips) { 3548 ret = -ENOMEM; 3549 goto out_err1; 3550 } 3551 3552 ret = copy_from_user(clips, clips_ptr, 3553 num_clips * sizeof(*clips)); 3554 if (ret) { 3555 ret = -EFAULT; 3556 goto out_err2; 3557 } 3558 } 3559 3560 if (fb->funcs->dirty) { 3561 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3562 clips, num_clips); 3563 } else { 3564 ret = -ENOSYS; 3565 } 3566 3567 out_err2: 3568 kfree(clips); 3569 out_err1: 3570 drm_framebuffer_unreference(fb); 3571 3572 return ret; 3573 } 3574 3575 3576 /** 3577 * drm_fb_release - remove and free the FBs on this file 3578 * @priv: drm file for the ioctl 3579 * 3580 * Destroy all the FBs associated with @filp. 3581 * 3582 * Called by the user via ioctl. 3583 * 3584 * Returns: 3585 * Zero on success, negative errno on failure. 3586 */ 3587 void drm_fb_release(struct drm_file *priv) 3588 { 3589 struct drm_device *dev = priv->dev; 3590 struct drm_framebuffer *fb, *tfb; 3591 3592 /* 3593 * When the file gets released that means no one else can access the fb 3594 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3595 * avoid upsetting lockdep since the universal cursor code adds a 3596 * framebuffer while holding mutex locks. 3597 * 3598 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3599 * locks is impossible here since no one else but this function can get 3600 * at it any more. 3601 */ 3602 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3603 3604 mutex_lock(&dev->mode_config.fb_lock); 3605 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ 3606 __drm_framebuffer_unregister(dev, fb); 3607 mutex_unlock(&dev->mode_config.fb_lock); 3608 3609 list_del_init(&fb->filp_head); 3610 3611 /* This will also drop the fpriv->fbs reference. */ 3612 drm_framebuffer_remove(fb); 3613 } 3614 } 3615 3616 /** 3617 * drm_property_create - create a new property type 3618 * @dev: drm device 3619 * @flags: flags specifying the property type 3620 * @name: name of the property 3621 * @num_values: number of pre-defined values 3622 * 3623 * This creates a new generic drm property which can then be attached to a drm 3624 * object with drm_object_attach_property. The returned property object must be 3625 * freed with drm_property_destroy. 3626 * 3627 * Note that the DRM core keeps a per-device list of properties and that, if 3628 * drm_mode_config_cleanup() is called, it will destroy all properties created 3629 * by the driver. 3630 * 3631 * Returns: 3632 * A pointer to the newly created property on success, NULL on failure. 3633 */ 3634 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3635 const char *name, int num_values) 3636 { 3637 struct drm_property *property = NULL; 3638 int ret; 3639 3640 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3641 if (!property) 3642 return NULL; 3643 3644 property->dev = dev; 3645 3646 if (num_values) { 3647 property->values = kcalloc(num_values, sizeof(uint64_t), 3648 GFP_KERNEL); 3649 if (!property->values) 3650 goto fail; 3651 } 3652 3653 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3654 if (ret) 3655 goto fail; 3656 3657 property->flags = flags; 3658 property->num_values = num_values; 3659 INIT_LIST_HEAD(&property->enum_list); 3660 3661 if (name) { 3662 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3663 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3664 } 3665 3666 list_add_tail(&property->head, &dev->mode_config.property_list); 3667 3668 WARN_ON(!drm_property_type_valid(property)); 3669 3670 return property; 3671 fail: 3672 kfree(property->values); 3673 kfree(property); 3674 return NULL; 3675 } 3676 EXPORT_SYMBOL(drm_property_create); 3677 3678 /** 3679 * drm_property_create_enum - create a new enumeration property type 3680 * @dev: drm device 3681 * @flags: flags specifying the property type 3682 * @name: name of the property 3683 * @props: enumeration lists with property values 3684 * @num_values: number of pre-defined values 3685 * 3686 * This creates a new generic drm property which can then be attached to a drm 3687 * object with drm_object_attach_property. The returned property object must be 3688 * freed with drm_property_destroy. 3689 * 3690 * Userspace is only allowed to set one of the predefined values for enumeration 3691 * properties. 3692 * 3693 * Returns: 3694 * A pointer to the newly created property on success, NULL on failure. 3695 */ 3696 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3697 const char *name, 3698 const struct drm_prop_enum_list *props, 3699 int num_values) 3700 { 3701 struct drm_property *property; 3702 int i, ret; 3703 3704 flags |= DRM_MODE_PROP_ENUM; 3705 3706 property = drm_property_create(dev, flags, name, num_values); 3707 if (!property) 3708 return NULL; 3709 3710 for (i = 0; i < num_values; i++) { 3711 ret = drm_property_add_enum(property, i, 3712 props[i].type, 3713 props[i].name); 3714 if (ret) { 3715 drm_property_destroy(dev, property); 3716 return NULL; 3717 } 3718 } 3719 3720 return property; 3721 } 3722 EXPORT_SYMBOL(drm_property_create_enum); 3723 3724 /** 3725 * drm_property_create_bitmask - create a new bitmask property type 3726 * @dev: drm device 3727 * @flags: flags specifying the property type 3728 * @name: name of the property 3729 * @props: enumeration lists with property bitflags 3730 * @num_props: size of the @props array 3731 * @supported_bits: bitmask of all supported enumeration values 3732 * 3733 * This creates a new bitmask drm property which can then be attached to a drm 3734 * object with drm_object_attach_property. The returned property object must be 3735 * freed with drm_property_destroy. 3736 * 3737 * Compared to plain enumeration properties userspace is allowed to set any 3738 * or'ed together combination of the predefined property bitflag values 3739 * 3740 * Returns: 3741 * A pointer to the newly created property on success, NULL on failure. 3742 */ 3743 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3744 int flags, const char *name, 3745 const struct drm_prop_enum_list *props, 3746 int num_props, 3747 uint64_t supported_bits) 3748 { 3749 struct drm_property *property; 3750 int i, ret, index = 0; 3751 int num_values = hweight64(supported_bits); 3752 3753 flags |= DRM_MODE_PROP_BITMASK; 3754 3755 property = drm_property_create(dev, flags, name, num_values); 3756 if (!property) 3757 return NULL; 3758 for (i = 0; i < num_props; i++) { 3759 if (!(supported_bits & (1ULL << props[i].type))) 3760 continue; 3761 3762 if (WARN_ON(index >= num_values)) { 3763 drm_property_destroy(dev, property); 3764 return NULL; 3765 } 3766 3767 ret = drm_property_add_enum(property, index++, 3768 props[i].type, 3769 props[i].name); 3770 if (ret) { 3771 drm_property_destroy(dev, property); 3772 return NULL; 3773 } 3774 } 3775 3776 return property; 3777 } 3778 EXPORT_SYMBOL(drm_property_create_bitmask); 3779 3780 static struct drm_property *property_create_range(struct drm_device *dev, 3781 int flags, const char *name, 3782 uint64_t min, uint64_t max) 3783 { 3784 struct drm_property *property; 3785 3786 property = drm_property_create(dev, flags, name, 2); 3787 if (!property) 3788 return NULL; 3789 3790 property->values[0] = min; 3791 property->values[1] = max; 3792 3793 return property; 3794 } 3795 3796 /** 3797 * drm_property_create_range - create a new unsigned ranged property type 3798 * @dev: drm device 3799 * @flags: flags specifying the property type 3800 * @name: name of the property 3801 * @min: minimum value of the property 3802 * @max: maximum value of the property 3803 * 3804 * This creates a new generic drm property which can then be attached to a drm 3805 * object with drm_object_attach_property. The returned property object must be 3806 * freed with drm_property_destroy. 3807 * 3808 * Userspace is allowed to set any unsigned integer value in the (min, max) 3809 * range inclusive. 3810 * 3811 * Returns: 3812 * A pointer to the newly created property on success, NULL on failure. 3813 */ 3814 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3815 const char *name, 3816 uint64_t min, uint64_t max) 3817 { 3818 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3819 name, min, max); 3820 } 3821 EXPORT_SYMBOL(drm_property_create_range); 3822 3823 /** 3824 * drm_property_create_signed_range - create a new signed ranged property type 3825 * @dev: drm device 3826 * @flags: flags specifying the property type 3827 * @name: name of the property 3828 * @min: minimum value of the property 3829 * @max: maximum value of the property 3830 * 3831 * This creates a new generic drm property which can then be attached to a drm 3832 * object with drm_object_attach_property. The returned property object must be 3833 * freed with drm_property_destroy. 3834 * 3835 * Userspace is allowed to set any signed integer value in the (min, max) 3836 * range inclusive. 3837 * 3838 * Returns: 3839 * A pointer to the newly created property on success, NULL on failure. 3840 */ 3841 struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3842 int flags, const char *name, 3843 int64_t min, int64_t max) 3844 { 3845 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3846 name, I642U64(min), I642U64(max)); 3847 } 3848 EXPORT_SYMBOL(drm_property_create_signed_range); 3849 3850 /** 3851 * drm_property_create_object - create a new object property type 3852 * @dev: drm device 3853 * @flags: flags specifying the property type 3854 * @name: name of the property 3855 * @type: object type from DRM_MODE_OBJECT_* defines 3856 * 3857 * This creates a new generic drm property which can then be attached to a drm 3858 * object with drm_object_attach_property. The returned property object must be 3859 * freed with drm_property_destroy. 3860 * 3861 * Userspace is only allowed to set this to any property value of the given 3862 * @type. Only useful for atomic properties, which is enforced. 3863 * 3864 * Returns: 3865 * A pointer to the newly created property on success, NULL on failure. 3866 */ 3867 struct drm_property *drm_property_create_object(struct drm_device *dev, 3868 int flags, const char *name, uint32_t type) 3869 { 3870 struct drm_property *property; 3871 3872 flags |= DRM_MODE_PROP_OBJECT; 3873 3874 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) 3875 return NULL; 3876 3877 property = drm_property_create(dev, flags, name, 1); 3878 if (!property) 3879 return NULL; 3880 3881 property->values[0] = type; 3882 3883 return property; 3884 } 3885 EXPORT_SYMBOL(drm_property_create_object); 3886 3887 /** 3888 * drm_property_create_bool - create a new boolean property type 3889 * @dev: drm device 3890 * @flags: flags specifying the property type 3891 * @name: name of the property 3892 * 3893 * This creates a new generic drm property which can then be attached to a drm 3894 * object with drm_object_attach_property. The returned property object must be 3895 * freed with drm_property_destroy. 3896 * 3897 * This is implemented as a ranged property with only {0, 1} as valid values. 3898 * 3899 * Returns: 3900 * A pointer to the newly created property on success, NULL on failure. 3901 */ 3902 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, 3903 const char *name) 3904 { 3905 return drm_property_create_range(dev, flags, name, 0, 1); 3906 } 3907 EXPORT_SYMBOL(drm_property_create_bool); 3908 3909 /** 3910 * drm_property_add_enum - add a possible value to an enumeration property 3911 * @property: enumeration property to change 3912 * @index: index of the new enumeration 3913 * @value: value of the new enumeration 3914 * @name: symbolic name of the new enumeration 3915 * 3916 * This functions adds enumerations to a property. 3917 * 3918 * It's use is deprecated, drivers should use one of the more specific helpers 3919 * to directly create the property with all enumerations already attached. 3920 * 3921 * Returns: 3922 * Zero on success, error code on failure. 3923 */ 3924 int drm_property_add_enum(struct drm_property *property, int index, 3925 uint64_t value, const char *name) 3926 { 3927 struct drm_property_enum *prop_enum; 3928 3929 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3930 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3931 return -EINVAL; 3932 3933 /* 3934 * Bitmask enum properties have the additional constraint of values 3935 * from 0 to 63 3936 */ 3937 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3938 (value > 63)) 3939 return -EINVAL; 3940 3941 if (!list_empty(&property->enum_list)) { 3942 list_for_each_entry(prop_enum, &property->enum_list, head) { 3943 if (prop_enum->value == value) { 3944 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3945 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3946 return 0; 3947 } 3948 } 3949 } 3950 3951 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3952 if (!prop_enum) 3953 return -ENOMEM; 3954 3955 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3956 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3957 prop_enum->value = value; 3958 3959 property->values[index] = value; 3960 list_add_tail(&prop_enum->head, &property->enum_list); 3961 return 0; 3962 } 3963 EXPORT_SYMBOL(drm_property_add_enum); 3964 3965 /** 3966 * drm_property_destroy - destroy a drm property 3967 * @dev: drm device 3968 * @property: property to destry 3969 * 3970 * This function frees a property including any attached resources like 3971 * enumeration values. 3972 */ 3973 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 3974 { 3975 struct drm_property_enum *prop_enum, *pt; 3976 3977 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 3978 list_del(&prop_enum->head); 3979 kfree(prop_enum); 3980 } 3981 3982 if (property->num_values) 3983 kfree(property->values); 3984 drm_mode_object_put(dev, &property->base); 3985 list_del(&property->head); 3986 kfree(property); 3987 } 3988 EXPORT_SYMBOL(drm_property_destroy); 3989 3990 /** 3991 * drm_object_attach_property - attach a property to a modeset object 3992 * @obj: drm modeset object 3993 * @property: property to attach 3994 * @init_val: initial value of the property 3995 * 3996 * This attaches the given property to the modeset object with the given initial 3997 * value. Currently this function cannot fail since the properties are stored in 3998 * a statically sized array. 3999 */ 4000 void drm_object_attach_property(struct drm_mode_object *obj, 4001 struct drm_property *property, 4002 uint64_t init_val) 4003 { 4004 int count = obj->properties->count; 4005 4006 if (count == DRM_OBJECT_MAX_PROPERTY) { 4007 WARN(1, "Failed to attach object property (type: 0x%x). Please " 4008 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 4009 "you see this message on the same object type.\n", 4010 obj->type); 4011 return; 4012 } 4013 4014 obj->properties->properties[count] = property; 4015 obj->properties->values[count] = init_val; 4016 obj->properties->count++; 4017 if (property->flags & DRM_MODE_PROP_ATOMIC) 4018 obj->properties->atomic_count++; 4019 } 4020 EXPORT_SYMBOL(drm_object_attach_property); 4021 4022 /** 4023 * drm_object_property_set_value - set the value of a property 4024 * @obj: drm mode object to set property value for 4025 * @property: property to set 4026 * @val: value the property should be set to 4027 * 4028 * This functions sets a given property on a given object. This function only 4029 * changes the software state of the property, it does not call into the 4030 * driver's ->set_property callback. 4031 * 4032 * Returns: 4033 * Zero on success, error code on failure. 4034 */ 4035 int drm_object_property_set_value(struct drm_mode_object *obj, 4036 struct drm_property *property, uint64_t val) 4037 { 4038 int i; 4039 4040 for (i = 0; i < obj->properties->count; i++) { 4041 if (obj->properties->properties[i] == property) { 4042 obj->properties->values[i] = val; 4043 return 0; 4044 } 4045 } 4046 4047 return -EINVAL; 4048 } 4049 EXPORT_SYMBOL(drm_object_property_set_value); 4050 4051 /** 4052 * drm_object_property_get_value - retrieve the value of a property 4053 * @obj: drm mode object to get property value from 4054 * @property: property to retrieve 4055 * @val: storage for the property value 4056 * 4057 * This function retrieves the softare state of the given property for the given 4058 * property. Since there is no driver callback to retrieve the current property 4059 * value this might be out of sync with the hardware, depending upon the driver 4060 * and property. 4061 * 4062 * Returns: 4063 * Zero on success, error code on failure. 4064 */ 4065 int drm_object_property_get_value(struct drm_mode_object *obj, 4066 struct drm_property *property, uint64_t *val) 4067 { 4068 int i; 4069 4070 /* read-only properties bypass atomic mechanism and still store 4071 * their value in obj->properties->values[].. mostly to avoid 4072 * having to deal w/ EDID and similar props in atomic paths: 4073 */ 4074 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && 4075 !(property->flags & DRM_MODE_PROP_IMMUTABLE)) 4076 return drm_atomic_get_property(obj, property, val); 4077 4078 for (i = 0; i < obj->properties->count; i++) { 4079 if (obj->properties->properties[i] == property) { 4080 *val = obj->properties->values[i]; 4081 return 0; 4082 } 4083 } 4084 4085 return -EINVAL; 4086 } 4087 EXPORT_SYMBOL(drm_object_property_get_value); 4088 4089 /** 4090 * drm_mode_getproperty_ioctl - get the property metadata 4091 * @dev: DRM device 4092 * @data: ioctl data 4093 * @file_priv: DRM file info 4094 * 4095 * This function retrieves the metadata for a given property, like the different 4096 * possible values for an enum property or the limits for a range property. 4097 * 4098 * Blob properties are special 4099 * 4100 * Called by the user via ioctl. 4101 * 4102 * Returns: 4103 * Zero on success, negative errno on failure. 4104 */ 4105 int drm_mode_getproperty_ioctl(struct drm_device *dev, 4106 void *data, struct drm_file *file_priv) 4107 { 4108 struct drm_mode_get_property *out_resp = data; 4109 struct drm_property *property; 4110 int enum_count = 0; 4111 int value_count = 0; 4112 int ret = 0, i; 4113 int copied; 4114 struct drm_property_enum *prop_enum; 4115 struct drm_mode_property_enum __user *enum_ptr; 4116 uint64_t __user *values_ptr; 4117 4118 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4119 return -EINVAL; 4120 4121 drm_modeset_lock_all(dev); 4122 property = drm_property_find(dev, out_resp->prop_id); 4123 if (!property) { 4124 ret = -ENOENT; 4125 goto done; 4126 } 4127 4128 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4129 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4130 list_for_each_entry(prop_enum, &property->enum_list, head) 4131 enum_count++; 4132 } 4133 4134 value_count = property->num_values; 4135 4136 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 4137 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 4138 out_resp->flags = property->flags; 4139 4140 if ((out_resp->count_values >= value_count) && value_count) { 4141 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 4142 for (i = 0; i < value_count; i++) { 4143 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 4144 ret = -EFAULT; 4145 goto done; 4146 } 4147 } 4148 } 4149 out_resp->count_values = value_count; 4150 4151 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4152 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4153 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 4154 copied = 0; 4155 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 4156 list_for_each_entry(prop_enum, &property->enum_list, head) { 4157 4158 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 4159 ret = -EFAULT; 4160 goto done; 4161 } 4162 4163 if (copy_to_user(&enum_ptr[copied].name, 4164 &prop_enum->name, DRM_PROP_NAME_LEN)) { 4165 ret = -EFAULT; 4166 goto done; 4167 } 4168 copied++; 4169 } 4170 } 4171 out_resp->count_enum_blobs = enum_count; 4172 } 4173 4174 /* 4175 * NOTE: The idea seems to have been to use this to read all the blob 4176 * property values. But nothing ever added them to the corresponding 4177 * list, userspace always used the special-purpose get_blob ioctl to 4178 * read the value for a blob property. It also doesn't make a lot of 4179 * sense to return values here when everything else is just metadata for 4180 * the property itself. 4181 */ 4182 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4183 out_resp->count_enum_blobs = 0; 4184 done: 4185 drm_modeset_unlock_all(dev); 4186 return ret; 4187 } 4188 4189 /** 4190 * drm_property_create_blob - Create new blob property 4191 * 4192 * Creates a new blob property for a specified DRM device, optionally 4193 * copying data. 4194 * 4195 * @dev: DRM device to create property for 4196 * @length: Length to allocate for blob data 4197 * @data: If specified, copies data into blob 4198 * 4199 * Returns: 4200 * New blob property with a single reference on success, or an ERR_PTR 4201 * value on failure. 4202 */ 4203 struct drm_property_blob * 4204 drm_property_create_blob(struct drm_device *dev, size_t length, 4205 const void *data) 4206 { 4207 struct drm_property_blob *blob; 4208 int ret; 4209 4210 if (!length) 4211 return ERR_PTR(-EINVAL); 4212 4213 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4214 if (!blob) 4215 return ERR_PTR(-ENOMEM); 4216 4217 /* This must be explicitly initialised, so we can safely call list_del 4218 * on it in the removal handler, even if it isn't in a file list. */ 4219 INIT_LIST_HEAD(&blob->head_file); 4220 blob->length = length; 4221 blob->dev = dev; 4222 4223 if (data) 4224 memcpy(blob->data, data, length); 4225 4226 mutex_lock(&dev->mode_config.blob_lock); 4227 4228 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 4229 if (ret) { 4230 kfree(blob); 4231 mutex_unlock(&dev->mode_config.blob_lock); 4232 return ERR_PTR(-EINVAL); 4233 } 4234 4235 kref_init(&blob->refcount); 4236 4237 list_add_tail(&blob->head_global, 4238 &dev->mode_config.property_blob_list); 4239 4240 mutex_unlock(&dev->mode_config.blob_lock); 4241 4242 return blob; 4243 } 4244 EXPORT_SYMBOL(drm_property_create_blob); 4245 4246 /** 4247 * drm_property_free_blob - Blob property destructor 4248 * 4249 * Internal free function for blob properties; must not be used directly. 4250 * 4251 * @kref: Reference 4252 */ 4253 static void drm_property_free_blob(struct kref *kref) 4254 { 4255 struct drm_property_blob *blob = 4256 container_of(kref, struct drm_property_blob, refcount); 4257 4258 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock)); 4259 4260 list_del(&blob->head_global); 4261 list_del(&blob->head_file); 4262 drm_mode_object_put(blob->dev, &blob->base); 4263 4264 kfree(blob); 4265 } 4266 4267 /** 4268 * drm_property_unreference_blob - Unreference a blob property 4269 * 4270 * Drop a reference on a blob property. May free the object. 4271 * 4272 * @blob: Pointer to blob property 4273 */ 4274 void drm_property_unreference_blob(struct drm_property_blob *blob) 4275 { 4276 struct drm_device *dev; 4277 4278 if (!blob) 4279 return; 4280 4281 dev = blob->dev; 4282 4283 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4284 4285 if (kref_put_mutex(&blob->refcount, drm_property_free_blob, 4286 &dev->mode_config.blob_lock)) 4287 mutex_unlock(&dev->mode_config.blob_lock); 4288 else 4289 might_lock(&dev->mode_config.blob_lock); 4290 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, atomic_read(&blob->refcount.refcount)); 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, atomic_read(&blob->refcount.refcount)); 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 if (old_blob) 4462 drm_property_unreference_blob(old_blob); 4463 4464 *replace = new_blob; 4465 4466 return 0; 4467 4468 err_created: 4469 drm_property_unreference_blob(new_blob); 4470 return ret; 4471 } 4472 4473 /** 4474 * drm_mode_getblob_ioctl - get the contents of a blob property value 4475 * @dev: DRM device 4476 * @data: ioctl data 4477 * @file_priv: DRM file info 4478 * 4479 * This function retrieves the contents of a blob property. The value stored in 4480 * an object's blob property is just a normal modeset object id. 4481 * 4482 * Called by the user via ioctl. 4483 * 4484 * Returns: 4485 * Zero on success, negative errno on failure. 4486 */ 4487 int drm_mode_getblob_ioctl(struct drm_device *dev, 4488 void *data, struct drm_file *file_priv) 4489 { 4490 struct drm_mode_get_blob *out_resp = data; 4491 struct drm_property_blob *blob; 4492 int ret = 0; 4493 void __user *blob_ptr; 4494 4495 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4496 return -EINVAL; 4497 4498 drm_modeset_lock_all(dev); 4499 mutex_lock(&dev->mode_config.blob_lock); 4500 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4501 if (!blob) { 4502 ret = -ENOENT; 4503 goto done; 4504 } 4505 4506 if (out_resp->length == blob->length) { 4507 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4508 if (copy_to_user(blob_ptr, blob->data, blob->length)) { 4509 ret = -EFAULT; 4510 goto done; 4511 } 4512 } 4513 out_resp->length = blob->length; 4514 4515 done: 4516 mutex_unlock(&dev->mode_config.blob_lock); 4517 drm_modeset_unlock_all(dev); 4518 return ret; 4519 } 4520 4521 /** 4522 * drm_mode_createblob_ioctl - create a new blob property 4523 * @dev: DRM device 4524 * @data: ioctl data 4525 * @file_priv: DRM file info 4526 * 4527 * This function creates a new blob property with user-defined values. In order 4528 * to give us sensible validation and checking when creating, rather than at 4529 * every potential use, we also require a type to be provided upfront. 4530 * 4531 * Called by the user via ioctl. 4532 * 4533 * Returns: 4534 * Zero on success, negative errno on failure. 4535 */ 4536 int drm_mode_createblob_ioctl(struct drm_device *dev, 4537 void *data, struct drm_file *file_priv) 4538 { 4539 struct drm_mode_create_blob *out_resp = data; 4540 struct drm_property_blob *blob; 4541 void __user *blob_ptr; 4542 int ret = 0; 4543 4544 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4545 return -EINVAL; 4546 4547 blob = drm_property_create_blob(dev, out_resp->length, NULL); 4548 if (IS_ERR(blob)) 4549 return PTR_ERR(blob); 4550 4551 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4552 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) { 4553 ret = -EFAULT; 4554 goto out_blob; 4555 } 4556 4557 /* Dropping the lock between create_blob and our access here is safe 4558 * as only the same file_priv can remove the blob; at this point, it is 4559 * not associated with any file_priv. */ 4560 mutex_lock(&dev->mode_config.blob_lock); 4561 out_resp->blob_id = blob->base.id; 4562 list_add_tail(&file_priv->blobs, &blob->head_file); 4563 mutex_unlock(&dev->mode_config.blob_lock); 4564 4565 return 0; 4566 4567 out_blob: 4568 drm_property_unreference_blob(blob); 4569 return ret; 4570 } 4571 4572 /** 4573 * drm_mode_destroyblob_ioctl - destroy a user blob property 4574 * @dev: DRM device 4575 * @data: ioctl data 4576 * @file_priv: DRM file info 4577 * 4578 * Destroy an existing user-defined blob property. 4579 * 4580 * Called by the user via ioctl. 4581 * 4582 * Returns: 4583 * Zero on success, negative errno on failure. 4584 */ 4585 int drm_mode_destroyblob_ioctl(struct drm_device *dev, 4586 void *data, struct drm_file *file_priv) 4587 { 4588 struct drm_mode_destroy_blob *out_resp = data; 4589 struct drm_property_blob *blob = NULL, *bt; 4590 bool found = false; 4591 int ret = 0; 4592 4593 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4594 return -EINVAL; 4595 4596 mutex_lock(&dev->mode_config.blob_lock); 4597 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4598 if (!blob) { 4599 ret = -ENOENT; 4600 goto err; 4601 } 4602 4603 /* Ensure the property was actually created by this user. */ 4604 list_for_each_entry(bt, &file_priv->blobs, head_file) { 4605 if (bt == blob) { 4606 found = true; 4607 break; 4608 } 4609 } 4610 4611 if (!found) { 4612 ret = -EPERM; 4613 goto err; 4614 } 4615 4616 /* We must drop head_file here, because we may not be the last 4617 * reference on the blob. */ 4618 list_del_init(&blob->head_file); 4619 drm_property_unreference_blob_locked(blob); 4620 mutex_unlock(&dev->mode_config.blob_lock); 4621 4622 return 0; 4623 4624 err: 4625 mutex_unlock(&dev->mode_config.blob_lock); 4626 return ret; 4627 } 4628 4629 /** 4630 * drm_mode_connector_set_path_property - set tile property on connector 4631 * @connector: connector to set property on. 4632 * @path: path to use for property; must not be NULL. 4633 * 4634 * This creates a property to expose to userspace to specify a 4635 * connector path. This is mainly used for DisplayPort MST where 4636 * connectors have a topology and we want to allow userspace to give 4637 * them more meaningful names. 4638 * 4639 * Returns: 4640 * Zero on success, negative errno on failure. 4641 */ 4642 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4643 const char *path) 4644 { 4645 struct drm_device *dev = connector->dev; 4646 int ret; 4647 4648 ret = drm_property_replace_global_blob(dev, 4649 &connector->path_blob_ptr, 4650 strlen(path) + 1, 4651 path, 4652 &connector->base, 4653 dev->mode_config.path_property); 4654 return ret; 4655 } 4656 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4657 4658 /** 4659 * drm_mode_connector_set_tile_property - set tile property on connector 4660 * @connector: connector to set property on. 4661 * 4662 * This looks up the tile information for a connector, and creates a 4663 * property for userspace to parse if it exists. The property is of 4664 * the form of 8 integers using ':' as a separator. 4665 * 4666 * Returns: 4667 * Zero on success, errno on failure. 4668 */ 4669 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4670 { 4671 struct drm_device *dev = connector->dev; 4672 char tile[256]; 4673 int ret; 4674 4675 if (!connector->has_tile) { 4676 ret = drm_property_replace_global_blob(dev, 4677 &connector->tile_blob_ptr, 4678 0, 4679 NULL, 4680 &connector->base, 4681 dev->mode_config.tile_property); 4682 return ret; 4683 } 4684 4685 ksnprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4686 connector->tile_group->id, connector->tile_is_single_monitor, 4687 connector->num_h_tile, connector->num_v_tile, 4688 connector->tile_h_loc, connector->tile_v_loc, 4689 connector->tile_h_size, connector->tile_v_size); 4690 4691 ret = drm_property_replace_global_blob(dev, 4692 &connector->tile_blob_ptr, 4693 strlen(tile) + 1, 4694 tile, 4695 &connector->base, 4696 dev->mode_config.tile_property); 4697 return ret; 4698 } 4699 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4700 4701 /** 4702 * drm_mode_connector_update_edid_property - update the edid property of a connector 4703 * @connector: drm connector 4704 * @edid: new value of the edid property 4705 * 4706 * This function creates a new blob modeset object and assigns its id to the 4707 * connector's edid property. 4708 * 4709 * Returns: 4710 * Zero on success, negative errno on failure. 4711 */ 4712 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4713 const struct edid *edid) 4714 { 4715 struct drm_device *dev = connector->dev; 4716 size_t size = 0; 4717 int ret; 4718 4719 /* ignore requests to set edid when overridden */ 4720 if (connector->override_edid) 4721 return 0; 4722 4723 if (edid) 4724 size = EDID_LENGTH * (1 + edid->extensions); 4725 4726 ret = drm_property_replace_global_blob(dev, 4727 &connector->edid_blob_ptr, 4728 size, 4729 edid, 4730 &connector->base, 4731 dev->mode_config.edid_property); 4732 return ret; 4733 } 4734 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4735 4736 /* Some properties could refer to dynamic refcnt'd objects, or things that 4737 * need special locking to handle lifetime issues (ie. to ensure the prop 4738 * value doesn't become invalid part way through the property update due to 4739 * race). The value returned by reference via 'obj' should be passed back 4740 * to drm_property_change_valid_put() after the property is set (and the 4741 * object to which the property is attached has a chance to take it's own 4742 * reference). 4743 */ 4744 bool drm_property_change_valid_get(struct drm_property *property, 4745 uint64_t value, struct drm_mode_object **ref) 4746 { 4747 int i; 4748 4749 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4750 return false; 4751 4752 *ref = NULL; 4753 4754 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4755 if (value < property->values[0] || value > property->values[1]) 4756 return false; 4757 return true; 4758 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4759 int64_t svalue = U642I64(value); 4760 4761 if (svalue < U642I64(property->values[0]) || 4762 svalue > U642I64(property->values[1])) 4763 return false; 4764 return true; 4765 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4766 uint64_t valid_mask = 0; 4767 4768 for (i = 0; i < property->num_values; i++) 4769 valid_mask |= (1ULL << property->values[i]); 4770 return !(value & ~valid_mask); 4771 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4772 struct drm_property_blob *blob; 4773 4774 if (value == 0) 4775 return true; 4776 4777 blob = drm_property_lookup_blob(property->dev, value); 4778 if (blob) { 4779 *ref = &blob->base; 4780 return true; 4781 } else { 4782 return false; 4783 } 4784 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4785 /* a zero value for an object property translates to null: */ 4786 if (value == 0) 4787 return true; 4788 4789 /* handle refcnt'd objects specially: */ 4790 if (property->values[0] == DRM_MODE_OBJECT_FB) { 4791 struct drm_framebuffer *fb; 4792 fb = drm_framebuffer_lookup(property->dev, value); 4793 if (fb) { 4794 *ref = &fb->base; 4795 return true; 4796 } else { 4797 return false; 4798 } 4799 } else { 4800 return _object_find(property->dev, value, property->values[0]) != NULL; 4801 } 4802 } 4803 4804 for (i = 0; i < property->num_values; i++) 4805 if (property->values[i] == value) 4806 return true; 4807 return false; 4808 } 4809 4810 void drm_property_change_valid_put(struct drm_property *property, 4811 struct drm_mode_object *ref) 4812 { 4813 if (!ref) 4814 return; 4815 4816 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4817 if (property->values[0] == DRM_MODE_OBJECT_FB) 4818 drm_framebuffer_unreference(obj_to_fb(ref)); 4819 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4820 drm_property_unreference_blob(obj_to_blob(ref)); 4821 } 4822 4823 /** 4824 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4825 * @dev: DRM device 4826 * @data: ioctl data 4827 * @file_priv: DRM file info 4828 * 4829 * This function sets the current value for a connectors's property. It also 4830 * calls into a driver's ->set_property callback to update the hardware state 4831 * 4832 * Called by the user via ioctl. 4833 * 4834 * Returns: 4835 * Zero on success, negative errno on failure. 4836 */ 4837 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4838 void *data, struct drm_file *file_priv) 4839 { 4840 struct drm_mode_connector_set_property *conn_set_prop = data; 4841 struct drm_mode_obj_set_property obj_set_prop = { 4842 .value = conn_set_prop->value, 4843 .prop_id = conn_set_prop->prop_id, 4844 .obj_id = conn_set_prop->connector_id, 4845 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4846 }; 4847 4848 /* It does all the locking and checking we need */ 4849 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4850 } 4851 4852 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4853 struct drm_property *property, 4854 uint64_t value) 4855 { 4856 int ret = -EINVAL; 4857 struct drm_connector *connector = obj_to_connector(obj); 4858 4859 /* Do DPMS ourselves */ 4860 if (property == connector->dev->mode_config.dpms_property) { 4861 if (connector->funcs->dpms) 4862 (*connector->funcs->dpms)(connector, (int)value); 4863 ret = 0; 4864 } else if (connector->funcs->set_property) 4865 ret = connector->funcs->set_property(connector, property, value); 4866 4867 /* store the property value if successful */ 4868 if (!ret) 4869 drm_object_property_set_value(&connector->base, property, value); 4870 return ret; 4871 } 4872 4873 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4874 struct drm_property *property, 4875 uint64_t value) 4876 { 4877 int ret = -EINVAL; 4878 struct drm_crtc *crtc = obj_to_crtc(obj); 4879 4880 if (crtc->funcs->set_property) 4881 ret = crtc->funcs->set_property(crtc, property, value); 4882 if (!ret) 4883 drm_object_property_set_value(obj, property, value); 4884 4885 return ret; 4886 } 4887 4888 /** 4889 * drm_mode_plane_set_obj_prop - set the value of a property 4890 * @plane: drm plane object to set property value for 4891 * @property: property to set 4892 * @value: value the property should be set to 4893 * 4894 * This functions sets a given property on a given plane object. This function 4895 * calls the driver's ->set_property callback and changes the software state of 4896 * the property if the callback succeeds. 4897 * 4898 * Returns: 4899 * Zero on success, error code on failure. 4900 */ 4901 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4902 struct drm_property *property, 4903 uint64_t value) 4904 { 4905 int ret = -EINVAL; 4906 struct drm_mode_object *obj = &plane->base; 4907 4908 if (plane->funcs->set_property) 4909 ret = plane->funcs->set_property(plane, property, value); 4910 if (!ret) 4911 drm_object_property_set_value(obj, property, value); 4912 4913 return ret; 4914 } 4915 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4916 4917 /** 4918 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 4919 * @dev: DRM device 4920 * @data: ioctl data 4921 * @file_priv: DRM file info 4922 * 4923 * This function retrieves the current value for an object's property. Compared 4924 * to the connector specific ioctl this one is extended to also work on crtc and 4925 * plane objects. 4926 * 4927 * Called by the user via ioctl. 4928 * 4929 * Returns: 4930 * Zero on success, negative errno on failure. 4931 */ 4932 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4933 struct drm_file *file_priv) 4934 { 4935 struct drm_mode_obj_get_properties *arg = data; 4936 struct drm_mode_object *obj; 4937 int ret = 0; 4938 4939 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4940 return -EINVAL; 4941 4942 drm_modeset_lock_all(dev); 4943 4944 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4945 if (!obj) { 4946 ret = -ENOENT; 4947 goto out; 4948 } 4949 if (!obj->properties) { 4950 ret = -EINVAL; 4951 goto out; 4952 } 4953 4954 ret = get_properties(obj, file_priv->atomic, 4955 (uint32_t __user *)(unsigned long)(arg->props_ptr), 4956 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), 4957 &arg->count_props); 4958 4959 out: 4960 drm_modeset_unlock_all(dev); 4961 return ret; 4962 } 4963 4964 /** 4965 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 4966 * @dev: DRM device 4967 * @data: ioctl data 4968 * @file_priv: DRM file info 4969 * 4970 * This function sets the current value for an object's property. It also calls 4971 * into a driver's ->set_property callback to update the hardware state. 4972 * Compared to the connector specific ioctl this one is extended to also work on 4973 * crtc and plane objects. 4974 * 4975 * Called by the user via ioctl. 4976 * 4977 * Returns: 4978 * Zero on success, negative errno on failure. 4979 */ 4980 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 4981 struct drm_file *file_priv) 4982 { 4983 struct drm_mode_obj_set_property *arg = data; 4984 struct drm_mode_object *arg_obj; 4985 struct drm_mode_object *prop_obj; 4986 struct drm_property *property; 4987 int i, ret = -EINVAL; 4988 struct drm_mode_object *ref; 4989 4990 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4991 return -EINVAL; 4992 4993 drm_modeset_lock_all(dev); 4994 4995 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4996 if (!arg_obj) { 4997 ret = -ENOENT; 4998 goto out; 4999 } 5000 if (!arg_obj->properties) 5001 goto out; 5002 5003 for (i = 0; i < arg_obj->properties->count; i++) 5004 if (arg_obj->properties->properties[i]->base.id == arg->prop_id) 5005 break; 5006 5007 if (i == arg_obj->properties->count) 5008 goto out; 5009 5010 prop_obj = drm_mode_object_find(dev, arg->prop_id, 5011 DRM_MODE_OBJECT_PROPERTY); 5012 if (!prop_obj) { 5013 ret = -ENOENT; 5014 goto out; 5015 } 5016 property = obj_to_property(prop_obj); 5017 5018 if (!drm_property_change_valid_get(property, arg->value, &ref)) 5019 goto out; 5020 5021 switch (arg_obj->type) { 5022 case DRM_MODE_OBJECT_CONNECTOR: 5023 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 5024 arg->value); 5025 break; 5026 case DRM_MODE_OBJECT_CRTC: 5027 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 5028 break; 5029 case DRM_MODE_OBJECT_PLANE: 5030 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 5031 property, arg->value); 5032 break; 5033 } 5034 5035 drm_property_change_valid_put(property, ref); 5036 5037 out: 5038 drm_modeset_unlock_all(dev); 5039 return ret; 5040 } 5041 5042 /** 5043 * drm_mode_connector_attach_encoder - attach a connector to an encoder 5044 * @connector: connector to attach 5045 * @encoder: encoder to attach @connector to 5046 * 5047 * This function links up a connector to an encoder. Note that the routing 5048 * restrictions between encoders and crtcs are exposed to userspace through the 5049 * possible_clones and possible_crtcs bitmasks. 5050 * 5051 * Returns: 5052 * Zero on success, negative errno on failure. 5053 */ 5054 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 5055 struct drm_encoder *encoder) 5056 { 5057 int i; 5058 5059 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 5060 if (connector->encoder_ids[i] == 0) { 5061 connector->encoder_ids[i] = encoder->base.id; 5062 return 0; 5063 } 5064 } 5065 return -ENOMEM; 5066 } 5067 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 5068 5069 /** 5070 * drm_mode_crtc_set_gamma_size - set the gamma table size 5071 * @crtc: CRTC to set the gamma table size for 5072 * @gamma_size: size of the gamma table 5073 * 5074 * Drivers which support gamma tables should set this to the supported gamma 5075 * table size when initializing the CRTC. Currently the drm core only supports a 5076 * fixed gamma table size. 5077 * 5078 * Returns: 5079 * Zero on success, negative errno on failure. 5080 */ 5081 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 5082 int gamma_size) 5083 { 5084 crtc->gamma_size = gamma_size; 5085 5086 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, 5087 GFP_KERNEL); 5088 if (!crtc->gamma_store) { 5089 crtc->gamma_size = 0; 5090 return -ENOMEM; 5091 } 5092 5093 return 0; 5094 } 5095 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 5096 5097 /** 5098 * drm_mode_gamma_set_ioctl - set the gamma table 5099 * @dev: DRM device 5100 * @data: ioctl data 5101 * @file_priv: DRM file info 5102 * 5103 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 5104 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 5105 * 5106 * Called by the user via ioctl. 5107 * 5108 * Returns: 5109 * Zero on success, negative errno on failure. 5110 */ 5111 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 5112 void *data, struct drm_file *file_priv) 5113 { 5114 struct drm_mode_crtc_lut *crtc_lut = data; 5115 struct drm_crtc *crtc; 5116 void *r_base, *g_base, *b_base; 5117 int size; 5118 int ret = 0; 5119 5120 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5121 return -EINVAL; 5122 5123 drm_modeset_lock_all(dev); 5124 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5125 if (!crtc) { 5126 ret = -ENOENT; 5127 goto out; 5128 } 5129 5130 if (crtc->funcs->gamma_set == NULL) { 5131 ret = -ENOSYS; 5132 goto out; 5133 } 5134 5135 /* memcpy into gamma store */ 5136 if (crtc_lut->gamma_size != crtc->gamma_size) { 5137 ret = -EINVAL; 5138 goto out; 5139 } 5140 5141 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5142 r_base = crtc->gamma_store; 5143 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 5144 ret = -EFAULT; 5145 goto out; 5146 } 5147 5148 g_base = (char *)r_base + size; 5149 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 5150 ret = -EFAULT; 5151 goto out; 5152 } 5153 5154 b_base = (char *)g_base + size; 5155 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 5156 ret = -EFAULT; 5157 goto out; 5158 } 5159 5160 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 5161 5162 out: 5163 drm_modeset_unlock_all(dev); 5164 return ret; 5165 5166 } 5167 5168 /** 5169 * drm_mode_gamma_get_ioctl - get the gamma table 5170 * @dev: DRM device 5171 * @data: ioctl data 5172 * @file_priv: DRM file info 5173 * 5174 * Copy the current gamma table into the storage provided. This also provides 5175 * the gamma table size the driver expects, which can be used to size the 5176 * allocated storage. 5177 * 5178 * Called by the user via ioctl. 5179 * 5180 * Returns: 5181 * Zero on success, negative errno on failure. 5182 */ 5183 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 5184 void *data, struct drm_file *file_priv) 5185 { 5186 struct drm_mode_crtc_lut *crtc_lut = data; 5187 struct drm_crtc *crtc; 5188 void *r_base, *g_base, *b_base; 5189 int size; 5190 int ret = 0; 5191 5192 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5193 return -EINVAL; 5194 5195 drm_modeset_lock_all(dev); 5196 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5197 if (!crtc) { 5198 ret = -ENOENT; 5199 goto out; 5200 } 5201 5202 /* memcpy into gamma store */ 5203 if (crtc_lut->gamma_size != crtc->gamma_size) { 5204 ret = -EINVAL; 5205 goto out; 5206 } 5207 5208 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5209 r_base = crtc->gamma_store; 5210 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 5211 ret = -EFAULT; 5212 goto out; 5213 } 5214 5215 g_base = (char *)r_base + size; 5216 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 5217 ret = -EFAULT; 5218 goto out; 5219 } 5220 5221 b_base = (char *)g_base + size; 5222 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 5223 ret = -EFAULT; 5224 goto out; 5225 } 5226 out: 5227 drm_modeset_unlock_all(dev); 5228 return ret; 5229 } 5230 5231 /* 5232 * The Linux version of kfree() is a macro and can't be called 5233 * directly via a function pointer 5234 */ 5235 static void drm_kms_free(void *arg) 5236 { 5237 kfree(arg); 5238 } 5239 5240 /** 5241 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 5242 * @dev: DRM device 5243 * @data: ioctl data 5244 * @file_priv: DRM file info 5245 * 5246 * This schedules an asynchronous update on a given CRTC, called page flip. 5247 * Optionally a drm event is generated to signal the completion of the event. 5248 * Generic drivers cannot assume that a pageflip with changed framebuffer 5249 * properties (including driver specific metadata like tiling layout) will work, 5250 * but some drivers support e.g. pixel format changes through the pageflip 5251 * ioctl. 5252 * 5253 * Called by the user via ioctl. 5254 * 5255 * Returns: 5256 * Zero on success, negative errno on failure. 5257 */ 5258 int drm_mode_page_flip_ioctl(struct drm_device *dev, 5259 void *data, struct drm_file *file_priv) 5260 { 5261 struct drm_mode_crtc_page_flip *page_flip = data; 5262 struct drm_crtc *crtc; 5263 struct drm_framebuffer *fb = NULL; 5264 struct drm_pending_vblank_event *e = NULL; 5265 int ret = -EINVAL; 5266 5267 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 5268 page_flip->reserved != 0) 5269 return -EINVAL; 5270 5271 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 5272 return -EINVAL; 5273 5274 crtc = drm_crtc_find(dev, page_flip->crtc_id); 5275 if (!crtc) 5276 return -ENOENT; 5277 5278 drm_modeset_lock_crtc(crtc, crtc->primary); 5279 if (crtc->primary->fb == NULL) { 5280 /* The framebuffer is currently unbound, presumably 5281 * due to a hotplug event, that userspace has not 5282 * yet discovered. 5283 */ 5284 ret = -EBUSY; 5285 goto out; 5286 } 5287 5288 if (crtc->funcs->page_flip == NULL) 5289 goto out; 5290 5291 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 5292 if (!fb) { 5293 ret = -ENOENT; 5294 goto out; 5295 } 5296 5297 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 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 lockmgr(&dev->event_lock, LK_EXCLUSIVE); 5310 if (file_priv->event_space < sizeof(e->event)) { 5311 lockmgr(&dev->event_lock, LK_RELEASE); 5312 goto out; 5313 } 5314 file_priv->event_space -= sizeof(e->event); 5315 lockmgr(&dev->event_lock, LK_RELEASE); 5316 5317 e = kzalloc(sizeof(*e), GFP_KERNEL); 5318 if (e == NULL) { 5319 lockmgr(&dev->event_lock, LK_EXCLUSIVE); 5320 file_priv->event_space += sizeof(e->event); 5321 lockmgr(&dev->event_lock, LK_RELEASE); 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 #ifdef __DragonFly__ 5331 e->base.destroy = 5332 (void (*) (struct drm_pending_event *)) drm_kms_free; 5333 #else 5334 e->base.destroy = 5335 (void (*) (struct drm_pending_event *)) kfree; 5336 #endif 5337 } 5338 5339 crtc->primary->old_fb = crtc->primary->fb; 5340 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 5341 if (ret) { 5342 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5343 lockmgr(&dev->event_lock, LK_EXCLUSIVE); 5344 file_priv->event_space += sizeof(e->event); 5345 lockmgr(&dev->event_lock, LK_RELEASE); 5346 kfree(e); 5347 } 5348 /* Keep the old fb, don't unref it. */ 5349 crtc->primary->old_fb = NULL; 5350 } else { 5351 /* 5352 * Warn if the driver hasn't properly updated the crtc->fb 5353 * field to reflect that the new framebuffer is now used. 5354 * Failing to do so will screw with the reference counting 5355 * on framebuffers. 5356 */ 5357 WARN_ON(crtc->primary->fb != fb); 5358 /* Unref only the old framebuffer. */ 5359 fb = NULL; 5360 } 5361 5362 out: 5363 if (fb) 5364 drm_framebuffer_unreference(fb); 5365 if (crtc->primary->old_fb) 5366 drm_framebuffer_unreference(crtc->primary->old_fb); 5367 crtc->primary->old_fb = NULL; 5368 drm_modeset_unlock_crtc(crtc); 5369 5370 return ret; 5371 } 5372 5373 /** 5374 * drm_mode_config_reset - call ->reset callbacks 5375 * @dev: drm device 5376 * 5377 * This functions calls all the crtc's, encoder's and connector's ->reset 5378 * callback. Drivers can use this in e.g. their driver load or resume code to 5379 * reset hardware and software state. 5380 */ 5381 void drm_mode_config_reset(struct drm_device *dev) 5382 { 5383 struct drm_crtc *crtc; 5384 struct drm_plane *plane; 5385 struct drm_encoder *encoder; 5386 struct drm_connector *connector; 5387 5388 list_for_each_entry(plane, &dev->mode_config.plane_list, head) 5389 if (plane->funcs->reset) 5390 plane->funcs->reset(plane); 5391 5392 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 5393 if (crtc->funcs->reset) 5394 crtc->funcs->reset(crtc); 5395 5396 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 5397 if (encoder->funcs->reset) 5398 encoder->funcs->reset(encoder); 5399 5400 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 5401 if (connector->funcs->reset) 5402 connector->funcs->reset(connector); 5403 } 5404 EXPORT_SYMBOL(drm_mode_config_reset); 5405 5406 /** 5407 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 5408 * @dev: DRM device 5409 * @data: ioctl data 5410 * @file_priv: DRM file info 5411 * 5412 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 5413 * TTM or something else entirely) and returns the resulting buffer handle. This 5414 * handle can then be wrapped up into a framebuffer modeset object. 5415 * 5416 * Note that userspace is not allowed to use such objects for render 5417 * acceleration - drivers must create their own private ioctls for such a use 5418 * case. 5419 * 5420 * Called by the user via ioctl. 5421 * 5422 * Returns: 5423 * Zero on success, negative errno on failure. 5424 */ 5425 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 5426 void *data, struct drm_file *file_priv) 5427 { 5428 struct drm_mode_create_dumb *args = data; 5429 u32 cpp, stride, size; 5430 5431 if (!dev->driver->dumb_create) 5432 return -ENOSYS; 5433 if (!args->width || !args->height || !args->bpp) 5434 return -EINVAL; 5435 5436 /* overflow checks for 32bit size calculations */ 5437 /* NOTE: DIV_ROUND_UP() can overflow */ 5438 cpp = DIV_ROUND_UP(args->bpp, 8); 5439 if (!cpp || cpp > 0xffffffffU / args->width) 5440 return -EINVAL; 5441 stride = cpp * args->width; 5442 if (args->height > 0xffffffffU / stride) 5443 return -EINVAL; 5444 5445 /* test for wrap-around */ 5446 size = args->height * stride; 5447 if (PAGE_ALIGN(size) == 0) 5448 return -EINVAL; 5449 5450 /* 5451 * handle, pitch and size are output parameters. Zero them out to 5452 * prevent drivers from accidentally using uninitialized data. Since 5453 * not all existing userspace is clearing these fields properly we 5454 * cannot reject IOCTL with garbage in them. 5455 */ 5456 args->handle = 0; 5457 args->pitch = 0; 5458 args->size = 0; 5459 5460 return dev->driver->dumb_create(file_priv, dev, args); 5461 } 5462 5463 /** 5464 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 5465 * @dev: DRM device 5466 * @data: ioctl data 5467 * @file_priv: DRM file info 5468 * 5469 * Allocate an offset in the drm device node's address space to be able to 5470 * memory map a dumb buffer. 5471 * 5472 * Called by the user via ioctl. 5473 * 5474 * Returns: 5475 * Zero on success, negative errno on failure. 5476 */ 5477 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 5478 void *data, struct drm_file *file_priv) 5479 { 5480 struct drm_mode_map_dumb *args = data; 5481 5482 /* call driver ioctl to get mmap offset */ 5483 if (!dev->driver->dumb_map_offset) 5484 return -ENOSYS; 5485 5486 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 5487 } 5488 5489 /** 5490 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 5491 * @dev: DRM device 5492 * @data: ioctl data 5493 * @file_priv: DRM file info 5494 * 5495 * This destroys the userspace handle for the given dumb backing storage buffer. 5496 * Since buffer objects must be reference counted in the kernel a buffer object 5497 * won't be immediately freed if a framebuffer modeset object still uses it. 5498 * 5499 * Called by the user via ioctl. 5500 * 5501 * Returns: 5502 * Zero on success, negative errno on failure. 5503 */ 5504 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 5505 void *data, struct drm_file *file_priv) 5506 { 5507 struct drm_mode_destroy_dumb *args = data; 5508 5509 if (!dev->driver->dumb_destroy) 5510 return -ENOSYS; 5511 5512 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 5513 } 5514 5515 /** 5516 * drm_fb_get_bpp_depth - get the bpp/depth values for format 5517 * @format: pixel format (DRM_FORMAT_*) 5518 * @depth: storage for the depth value 5519 * @bpp: storage for the bpp value 5520 * 5521 * This only supports RGB formats here for compat with code that doesn't use 5522 * pixel formats directly yet. 5523 */ 5524 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 5525 int *bpp) 5526 { 5527 switch (format) { 5528 case DRM_FORMAT_C8: 5529 case DRM_FORMAT_RGB332: 5530 case DRM_FORMAT_BGR233: 5531 *depth = 8; 5532 *bpp = 8; 5533 break; 5534 case DRM_FORMAT_XRGB1555: 5535 case DRM_FORMAT_XBGR1555: 5536 case DRM_FORMAT_RGBX5551: 5537 case DRM_FORMAT_BGRX5551: 5538 case DRM_FORMAT_ARGB1555: 5539 case DRM_FORMAT_ABGR1555: 5540 case DRM_FORMAT_RGBA5551: 5541 case DRM_FORMAT_BGRA5551: 5542 *depth = 15; 5543 *bpp = 16; 5544 break; 5545 case DRM_FORMAT_RGB565: 5546 case DRM_FORMAT_BGR565: 5547 *depth = 16; 5548 *bpp = 16; 5549 break; 5550 case DRM_FORMAT_RGB888: 5551 case DRM_FORMAT_BGR888: 5552 *depth = 24; 5553 *bpp = 24; 5554 break; 5555 case DRM_FORMAT_XRGB8888: 5556 case DRM_FORMAT_XBGR8888: 5557 case DRM_FORMAT_RGBX8888: 5558 case DRM_FORMAT_BGRX8888: 5559 *depth = 24; 5560 *bpp = 32; 5561 break; 5562 case DRM_FORMAT_XRGB2101010: 5563 case DRM_FORMAT_XBGR2101010: 5564 case DRM_FORMAT_RGBX1010102: 5565 case DRM_FORMAT_BGRX1010102: 5566 case DRM_FORMAT_ARGB2101010: 5567 case DRM_FORMAT_ABGR2101010: 5568 case DRM_FORMAT_RGBA1010102: 5569 case DRM_FORMAT_BGRA1010102: 5570 *depth = 30; 5571 *bpp = 32; 5572 break; 5573 case DRM_FORMAT_ARGB8888: 5574 case DRM_FORMAT_ABGR8888: 5575 case DRM_FORMAT_RGBA8888: 5576 case DRM_FORMAT_BGRA8888: 5577 *depth = 32; 5578 *bpp = 32; 5579 break; 5580 default: 5581 DRM_DEBUG_KMS("unsupported pixel format %s\n", 5582 drm_get_format_name(format)); 5583 *depth = 0; 5584 *bpp = 0; 5585 break; 5586 } 5587 } 5588 EXPORT_SYMBOL(drm_fb_get_bpp_depth); 5589 5590 /** 5591 * drm_format_num_planes - get the number of planes for format 5592 * @format: pixel format (DRM_FORMAT_*) 5593 * 5594 * Returns: 5595 * The number of planes used by the specified pixel format. 5596 */ 5597 int drm_format_num_planes(uint32_t format) 5598 { 5599 switch (format) { 5600 case DRM_FORMAT_YUV410: 5601 case DRM_FORMAT_YVU410: 5602 case DRM_FORMAT_YUV411: 5603 case DRM_FORMAT_YVU411: 5604 case DRM_FORMAT_YUV420: 5605 case DRM_FORMAT_YVU420: 5606 case DRM_FORMAT_YUV422: 5607 case DRM_FORMAT_YVU422: 5608 case DRM_FORMAT_YUV444: 5609 case DRM_FORMAT_YVU444: 5610 return 3; 5611 case DRM_FORMAT_NV12: 5612 case DRM_FORMAT_NV21: 5613 case DRM_FORMAT_NV16: 5614 case DRM_FORMAT_NV61: 5615 case DRM_FORMAT_NV24: 5616 case DRM_FORMAT_NV42: 5617 return 2; 5618 default: 5619 return 1; 5620 } 5621 } 5622 EXPORT_SYMBOL(drm_format_num_planes); 5623 5624 /** 5625 * drm_format_plane_cpp - determine the bytes per pixel value 5626 * @format: pixel format (DRM_FORMAT_*) 5627 * @plane: plane index 5628 * 5629 * Returns: 5630 * The bytes per pixel value for the specified plane. 5631 */ 5632 int drm_format_plane_cpp(uint32_t format, int plane) 5633 { 5634 unsigned int depth; 5635 int bpp; 5636 5637 if (plane >= drm_format_num_planes(format)) 5638 return 0; 5639 5640 switch (format) { 5641 case DRM_FORMAT_YUYV: 5642 case DRM_FORMAT_YVYU: 5643 case DRM_FORMAT_UYVY: 5644 case DRM_FORMAT_VYUY: 5645 return 2; 5646 case DRM_FORMAT_NV12: 5647 case DRM_FORMAT_NV21: 5648 case DRM_FORMAT_NV16: 5649 case DRM_FORMAT_NV61: 5650 case DRM_FORMAT_NV24: 5651 case DRM_FORMAT_NV42: 5652 return plane ? 2 : 1; 5653 case DRM_FORMAT_YUV410: 5654 case DRM_FORMAT_YVU410: 5655 case DRM_FORMAT_YUV411: 5656 case DRM_FORMAT_YVU411: 5657 case DRM_FORMAT_YUV420: 5658 case DRM_FORMAT_YVU420: 5659 case DRM_FORMAT_YUV422: 5660 case DRM_FORMAT_YVU422: 5661 case DRM_FORMAT_YUV444: 5662 case DRM_FORMAT_YVU444: 5663 return 1; 5664 default: 5665 drm_fb_get_bpp_depth(format, &depth, &bpp); 5666 return bpp >> 3; 5667 } 5668 } 5669 EXPORT_SYMBOL(drm_format_plane_cpp); 5670 5671 /** 5672 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 5673 * @format: pixel format (DRM_FORMAT_*) 5674 * 5675 * Returns: 5676 * The horizontal chroma subsampling factor for the 5677 * specified pixel format. 5678 */ 5679 int drm_format_horz_chroma_subsampling(uint32_t format) 5680 { 5681 switch (format) { 5682 case DRM_FORMAT_YUV411: 5683 case DRM_FORMAT_YVU411: 5684 case DRM_FORMAT_YUV410: 5685 case DRM_FORMAT_YVU410: 5686 return 4; 5687 case DRM_FORMAT_YUYV: 5688 case DRM_FORMAT_YVYU: 5689 case DRM_FORMAT_UYVY: 5690 case DRM_FORMAT_VYUY: 5691 case DRM_FORMAT_NV12: 5692 case DRM_FORMAT_NV21: 5693 case DRM_FORMAT_NV16: 5694 case DRM_FORMAT_NV61: 5695 case DRM_FORMAT_YUV422: 5696 case DRM_FORMAT_YVU422: 5697 case DRM_FORMAT_YUV420: 5698 case DRM_FORMAT_YVU420: 5699 return 2; 5700 default: 5701 return 1; 5702 } 5703 } 5704 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5705 5706 /** 5707 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5708 * @format: pixel format (DRM_FORMAT_*) 5709 * 5710 * Returns: 5711 * The vertical chroma subsampling factor for the 5712 * specified pixel format. 5713 */ 5714 int drm_format_vert_chroma_subsampling(uint32_t format) 5715 { 5716 switch (format) { 5717 case DRM_FORMAT_YUV410: 5718 case DRM_FORMAT_YVU410: 5719 return 4; 5720 case DRM_FORMAT_YUV420: 5721 case DRM_FORMAT_YVU420: 5722 case DRM_FORMAT_NV12: 5723 case DRM_FORMAT_NV21: 5724 return 2; 5725 default: 5726 return 1; 5727 } 5728 } 5729 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5730 5731 /** 5732 * drm_rotation_simplify() - Try to simplify the rotation 5733 * @rotation: Rotation to be simplified 5734 * @supported_rotations: Supported rotations 5735 * 5736 * Attempt to simplify the rotation to a form that is supported. 5737 * Eg. if the hardware supports everything except DRM_REFLECT_X 5738 * one could call this function like this: 5739 * 5740 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5741 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5742 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5743 * 5744 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5745 * transforms the hardware supports, this function may not 5746 * be able to produce a supported transform, so the caller should 5747 * check the result afterwards. 5748 */ 5749 unsigned int drm_rotation_simplify(unsigned int rotation, 5750 unsigned int supported_rotations) 5751 { 5752 if (rotation & ~supported_rotations) { 5753 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5754 rotation = (rotation & ~0xf) | BIT((ffs(rotation & 0xf) + 1) % 4); 5755 } 5756 5757 return rotation; 5758 } 5759 EXPORT_SYMBOL(drm_rotation_simplify); 5760 5761 /** 5762 * drm_mode_config_init - initialize DRM mode_configuration structure 5763 * @dev: DRM device 5764 * 5765 * Initialize @dev's mode_config structure, used for tracking the graphics 5766 * configuration of @dev. 5767 * 5768 * Since this initializes the modeset locks, no locking is possible. Which is no 5769 * problem, since this should happen single threaded at init time. It is the 5770 * driver's problem to ensure this guarantee. 5771 * 5772 */ 5773 void drm_mode_config_init(struct drm_device *dev) 5774 { 5775 lockinit(&dev->mode_config.mutex, "drmmcm", 0, LK_CANRECURSE); 5776 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5777 lockinit(&dev->mode_config.idr_mutex, "mcfgidr", 0, LK_CANRECURSE); 5778 lockinit(&dev->mode_config.fb_lock, "drmfbl", 0, LK_CANRECURSE); 5779 lockinit(&dev->mode_config.blob_lock, "drmcbl", 0, LK_CANRECURSE); 5780 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5781 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5782 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5783 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5784 INIT_LIST_HEAD(&dev->mode_config.property_list); 5785 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5786 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5787 idr_init(&dev->mode_config.crtc_idr); 5788 idr_init(&dev->mode_config.tile_idr); 5789 5790 drm_modeset_lock_all(dev); 5791 drm_mode_create_standard_properties(dev); 5792 drm_modeset_unlock_all(dev); 5793 5794 /* Just to be sure */ 5795 dev->mode_config.num_fb = 0; 5796 dev->mode_config.num_connector = 0; 5797 dev->mode_config.num_crtc = 0; 5798 dev->mode_config.num_encoder = 0; 5799 dev->mode_config.num_overlay_plane = 0; 5800 dev->mode_config.num_total_plane = 0; 5801 } 5802 EXPORT_SYMBOL(drm_mode_config_init); 5803 5804 /** 5805 * drm_mode_config_cleanup - free up DRM mode_config info 5806 * @dev: DRM device 5807 * 5808 * Free up all the connectors and CRTCs associated with this DRM device, then 5809 * free up the framebuffers and associated buffer objects. 5810 * 5811 * Note that since this /should/ happen single-threaded at driver/device 5812 * teardown time, no locking is required. It's the driver's job to ensure that 5813 * this guarantee actually holds true. 5814 * 5815 * FIXME: cleanup any dangling user buffer objects too 5816 */ 5817 void drm_mode_config_cleanup(struct drm_device *dev) 5818 { 5819 struct drm_connector *connector, *ot; 5820 struct drm_crtc *crtc, *ct; 5821 struct drm_encoder *encoder, *enct; 5822 struct drm_framebuffer *fb, *fbt; 5823 struct drm_property *property, *pt; 5824 struct drm_property_blob *blob, *bt; 5825 struct drm_plane *plane, *plt; 5826 5827 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5828 head) { 5829 encoder->funcs->destroy(encoder); 5830 } 5831 5832 list_for_each_entry_safe(connector, ot, 5833 &dev->mode_config.connector_list, head) { 5834 connector->funcs->destroy(connector); 5835 } 5836 5837 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5838 head) { 5839 drm_property_destroy(dev, property); 5840 } 5841 5842 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5843 head_global) { 5844 drm_property_unreference_blob(blob); 5845 } 5846 5847 /* 5848 * Single-threaded teardown context, so it's not required to grab the 5849 * fb_lock to protect against concurrent fb_list access. Contrary, it 5850 * would actually deadlock with the drm_framebuffer_cleanup function. 5851 * 5852 * Also, if there are any framebuffers left, that's a driver leak now, 5853 * so politely WARN about this. 5854 */ 5855 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5856 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5857 drm_framebuffer_remove(fb); 5858 } 5859 5860 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5861 head) { 5862 plane->funcs->destroy(plane); 5863 } 5864 5865 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5866 crtc->funcs->destroy(crtc); 5867 } 5868 5869 idr_destroy(&dev->mode_config.tile_idr); 5870 idr_destroy(&dev->mode_config.crtc_idr); 5871 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5872 } 5873 EXPORT_SYMBOL(drm_mode_config_cleanup); 5874 5875 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5876 unsigned int supported_rotations) 5877 { 5878 static const struct drm_prop_enum_list props[] = { 5879 { DRM_ROTATE_0, "rotate-0" }, 5880 { DRM_ROTATE_90, "rotate-90" }, 5881 { DRM_ROTATE_180, "rotate-180" }, 5882 { DRM_ROTATE_270, "rotate-270" }, 5883 { DRM_REFLECT_X, "reflect-x" }, 5884 { DRM_REFLECT_Y, "reflect-y" }, 5885 }; 5886 5887 return drm_property_create_bitmask(dev, 0, "rotation", 5888 props, ARRAY_SIZE(props), 5889 supported_rotations); 5890 } 5891 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5892 5893 /** 5894 * DOC: Tile group 5895 * 5896 * Tile groups are used to represent tiled monitors with a unique 5897 * integer identifier. Tiled monitors using DisplayID v1.3 have 5898 * a unique 8-byte handle, we store this in a tile group, so we 5899 * have a common identifier for all tiles in a monitor group. 5900 */ 5901 static void drm_tile_group_free(struct kref *kref) 5902 { 5903 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5904 struct drm_device *dev = tg->dev; 5905 mutex_lock(&dev->mode_config.idr_mutex); 5906 idr_remove(&dev->mode_config.tile_idr, tg->id); 5907 mutex_unlock(&dev->mode_config.idr_mutex); 5908 kfree(tg); 5909 } 5910 5911 /** 5912 * drm_mode_put_tile_group - drop a reference to a tile group. 5913 * @dev: DRM device 5914 * @tg: tile group to drop reference to. 5915 * 5916 * drop reference to tile group and free if 0. 5917 */ 5918 void drm_mode_put_tile_group(struct drm_device *dev, 5919 struct drm_tile_group *tg) 5920 { 5921 kref_put(&tg->refcount, drm_tile_group_free); 5922 } 5923 5924 /** 5925 * drm_mode_get_tile_group - get a reference to an existing tile group 5926 * @dev: DRM device 5927 * @topology: 8-bytes unique per monitor. 5928 * 5929 * Use the unique bytes to get a reference to an existing tile group. 5930 * 5931 * RETURNS: 5932 * tile group or NULL if not found. 5933 */ 5934 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 5935 char topology[8]) 5936 { 5937 #if 0 5938 struct drm_tile_group *tg; 5939 int id; 5940 mutex_lock(&dev->mode_config.idr_mutex); 5941 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 5942 if (!memcmp(tg->group_data, topology, 8)) { 5943 if (!kref_get_unless_zero(&tg->refcount)) 5944 tg = NULL; 5945 mutex_unlock(&dev->mode_config.idr_mutex); 5946 return tg; 5947 } 5948 } 5949 mutex_unlock(&dev->mode_config.idr_mutex); 5950 #endif 5951 return NULL; 5952 } 5953 EXPORT_SYMBOL(drm_mode_get_tile_group); 5954 5955 /** 5956 * drm_mode_create_tile_group - create a tile group from a displayid description 5957 * @dev: DRM device 5958 * @topology: 8-bytes unique per monitor. 5959 * 5960 * Create a tile group for the unique monitor, and get a unique 5961 * identifier for the tile group. 5962 * 5963 * RETURNS: 5964 * new tile group or error. 5965 */ 5966 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 5967 char topology[8]) 5968 { 5969 struct drm_tile_group *tg; 5970 int ret; 5971 5972 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 5973 if (!tg) 5974 return ERR_PTR(-ENOMEM); 5975 5976 kref_init(&tg->refcount); 5977 memcpy(tg->group_data, topology, 8); 5978 tg->dev = dev; 5979 5980 mutex_lock(&dev->mode_config.idr_mutex); 5981 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 5982 if (ret >= 0) { 5983 tg->id = ret; 5984 } else { 5985 kfree(tg); 5986 tg = ERR_PTR(ret); 5987 } 5988 5989 mutex_unlock(&dev->mode_config.idr_mutex); 5990 return tg; 5991 } 5992 EXPORT_SYMBOL(drm_mode_create_tile_group); 5993