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/slab.h> 35 #include <linux/export.h> 36 #include <drm/drmP.h> 37 #include <drm/drm_crtc.h> 38 #include <drm/drm_edid.h> 39 #include <drm/drm_fourcc.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 struct ida ida; 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 int i; 196 197 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 198 ida_init(&drm_connector_enum_list[i].ida); 199 } 200 201 void drm_connector_ida_destroy(void) 202 { 203 int i; 204 205 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 206 ida_destroy(&drm_connector_enum_list[i].ida); 207 } 208 209 /** 210 * drm_get_connector_status_name - return a string for connector status 211 * @status: connector status to compute name of 212 * 213 * In contrast to the other drm_get_*_name functions this one here returns a 214 * const pointer and hence is threadsafe. 215 */ 216 const char *drm_get_connector_status_name(enum drm_connector_status status) 217 { 218 if (status == connector_status_connected) 219 return "connected"; 220 else if (status == connector_status_disconnected) 221 return "disconnected"; 222 else 223 return "unknown"; 224 } 225 EXPORT_SYMBOL(drm_get_connector_status_name); 226 227 /** 228 * drm_get_subpixel_order_name - return a string for a given subpixel enum 229 * @order: enum of subpixel_order 230 * 231 * Note you could abuse this and return something out of bounds, but that 232 * would be a caller error. No unscrubbed user data should make it here. 233 */ 234 const char *drm_get_subpixel_order_name(enum subpixel_order order) 235 { 236 return drm_subpixel_enum_list[order].name; 237 } 238 EXPORT_SYMBOL(drm_get_subpixel_order_name); 239 240 static char printable_char(int c) 241 { 242 return isascii(c) && isprint(c) ? c : '?'; 243 } 244 245 /** 246 * drm_get_format_name - return a string for drm fourcc format 247 * @format: format to compute name of 248 * 249 * Note that the buffer used by this function is globally shared and owned by 250 * the function itself. 251 * 252 * FIXME: This isn't really multithreading safe. 253 */ 254 const char *drm_get_format_name(uint32_t format) 255 { 256 static char buf[32]; 257 258 snprintf(buf, sizeof(buf), 259 "%c%c%c%c %s-endian (0x%08x)", 260 printable_char(format & 0xff), 261 printable_char((format >> 8) & 0xff), 262 printable_char((format >> 16) & 0xff), 263 printable_char((format >> 24) & 0x7f), 264 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", 265 format); 266 267 return buf; 268 } 269 EXPORT_SYMBOL(drm_get_format_name); 270 271 /* 272 * Internal function to assign a slot in the object idr and optionally 273 * register the object into the idr. 274 */ 275 static int drm_mode_object_get_reg(struct drm_device *dev, 276 struct drm_mode_object *obj, 277 uint32_t obj_type, 278 bool register_obj) 279 { 280 int ret; 281 282 mutex_lock(&dev->mode_config.idr_mutex); 283 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); 284 if (ret >= 0) { 285 /* 286 * Set up the object linking under the protection of the idr 287 * lock so that other users can't see inconsistent state. 288 */ 289 obj->id = ret; 290 obj->type = obj_type; 291 } 292 mutex_unlock(&dev->mode_config.idr_mutex); 293 294 return ret < 0 ? ret : 0; 295 } 296 297 /** 298 * drm_mode_object_get - allocate a new modeset identifier 299 * @dev: DRM device 300 * @obj: object pointer, used to generate unique ID 301 * @obj_type: object type 302 * 303 * Create a unique identifier based on @ptr in @dev's identifier space. Used 304 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix 305 * modeset identifiers are _not_ reference counted. Hence don't use this for 306 * reference counted modeset objects like framebuffers. 307 * 308 * Returns: 309 * New unique (relative to other objects in @dev) integer identifier for the 310 * object. 311 */ 312 int drm_mode_object_get(struct drm_device *dev, 313 struct drm_mode_object *obj, uint32_t obj_type) 314 { 315 return drm_mode_object_get_reg(dev, obj, obj_type, true); 316 } 317 318 static void drm_mode_object_register(struct drm_device *dev, 319 struct drm_mode_object *obj) 320 { 321 mutex_lock(&dev->mode_config.idr_mutex); 322 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); 323 mutex_unlock(&dev->mode_config.idr_mutex); 324 } 325 326 /** 327 * drm_mode_object_put - free a modeset identifer 328 * @dev: DRM device 329 * @object: object to free 330 * 331 * Free @id from @dev's unique identifier pool. Note that despite the _get 332 * postfix modeset identifiers are _not_ reference counted. Hence don't use this 333 * for reference counted modeset objects like framebuffers. 334 */ 335 void drm_mode_object_put(struct drm_device *dev, 336 struct drm_mode_object *object) 337 { 338 mutex_lock(&dev->mode_config.idr_mutex); 339 idr_remove(&dev->mode_config.crtc_idr, object->id); 340 mutex_unlock(&dev->mode_config.idr_mutex); 341 } 342 343 static struct drm_mode_object *_object_find(struct drm_device *dev, 344 uint32_t id, uint32_t type) 345 { 346 struct drm_mode_object *obj = NULL; 347 348 mutex_lock(&dev->mode_config.idr_mutex); 349 obj = idr_find(&dev->mode_config.crtc_idr, id); 350 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) 351 obj = NULL; 352 if (obj && obj->id != id) 353 obj = NULL; 354 /* don't leak out unref'd fb's */ 355 if (obj && 356 (obj->type == DRM_MODE_OBJECT_FB || 357 obj->type == DRM_MODE_OBJECT_BLOB)) 358 obj = NULL; 359 mutex_unlock(&dev->mode_config.idr_mutex); 360 361 return obj; 362 } 363 364 /** 365 * drm_mode_object_find - look up a drm object with static lifetime 366 * @dev: drm device 367 * @id: id of the mode object 368 * @type: type of the mode object 369 * 370 * Note that framebuffers cannot be looked up with this functions - since those 371 * are reference counted, they need special treatment. Even with 372 * DRM_MODE_OBJECT_ANY (although that will simply return NULL 373 * rather than WARN_ON()). 374 */ 375 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, 376 uint32_t id, uint32_t type) 377 { 378 struct drm_mode_object *obj = NULL; 379 380 /* Framebuffers are reference counted and need their own lookup 381 * function.*/ 382 WARN_ON(type == DRM_MODE_OBJECT_FB || type == DRM_MODE_OBJECT_BLOB); 383 obj = _object_find(dev, id, type); 384 return obj; 385 } 386 EXPORT_SYMBOL(drm_mode_object_find); 387 388 /** 389 * drm_framebuffer_init - initialize a framebuffer 390 * @dev: DRM device 391 * @fb: framebuffer to be initialized 392 * @funcs: ... with these functions 393 * 394 * Allocates an ID for the framebuffer's parent mode object, sets its mode 395 * functions & device file and adds it to the master fd list. 396 * 397 * IMPORTANT: 398 * This functions publishes the fb and makes it available for concurrent access 399 * by other users. Which means by this point the fb _must_ be fully set up - 400 * since all the fb attributes are invariant over its lifetime, no further 401 * locking but only correct reference counting is required. 402 * 403 * Returns: 404 * Zero on success, error code on failure. 405 */ 406 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, 407 const struct drm_framebuffer_funcs *funcs) 408 { 409 int ret; 410 411 mutex_lock(&dev->mode_config.fb_lock); 412 kref_init(&fb->refcount); 413 INIT_LIST_HEAD(&fb->filp_head); 414 fb->dev = dev; 415 fb->funcs = funcs; 416 417 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB); 418 if (ret) 419 goto out; 420 421 dev->mode_config.num_fb++; 422 list_add(&fb->head, &dev->mode_config.fb_list); 423 out: 424 mutex_unlock(&dev->mode_config.fb_lock); 425 426 return 0; 427 } 428 EXPORT_SYMBOL(drm_framebuffer_init); 429 430 /* dev->mode_config.fb_lock must be held! */ 431 static void __drm_framebuffer_unregister(struct drm_device *dev, 432 struct drm_framebuffer *fb) 433 { 434 mutex_lock(&dev->mode_config.idr_mutex); 435 idr_remove(&dev->mode_config.crtc_idr, fb->base.id); 436 mutex_unlock(&dev->mode_config.idr_mutex); 437 438 fb->base.id = 0; 439 } 440 441 static void drm_framebuffer_free(struct kref *kref) 442 { 443 struct drm_framebuffer *fb = 444 container_of(kref, struct drm_framebuffer, refcount); 445 struct drm_device *dev = fb->dev; 446 447 /* 448 * The lookup idr holds a weak reference, which has not necessarily been 449 * removed at this point. Check for that. 450 */ 451 mutex_lock(&dev->mode_config.fb_lock); 452 if (fb->base.id) { 453 /* Mark fb as reaped and drop idr ref. */ 454 __drm_framebuffer_unregister(dev, fb); 455 } 456 mutex_unlock(&dev->mode_config.fb_lock); 457 458 fb->funcs->destroy(fb); 459 } 460 461 static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev, 462 uint32_t id) 463 { 464 struct drm_mode_object *obj = NULL; 465 struct drm_framebuffer *fb; 466 467 mutex_lock(&dev->mode_config.idr_mutex); 468 obj = idr_find(&dev->mode_config.crtc_idr, id); 469 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id)) 470 fb = NULL; 471 else 472 fb = obj_to_fb(obj); 473 mutex_unlock(&dev->mode_config.idr_mutex); 474 475 return fb; 476 } 477 478 /** 479 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference 480 * @dev: drm device 481 * @id: id of the fb object 482 * 483 * If successful, this grabs an additional reference to the framebuffer - 484 * callers need to make sure to eventually unreference the returned framebuffer 485 * again, using @drm_framebuffer_unreference. 486 */ 487 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, 488 uint32_t id) 489 { 490 struct drm_framebuffer *fb; 491 492 mutex_lock(&dev->mode_config.fb_lock); 493 fb = __drm_framebuffer_lookup(dev, id); 494 if (fb) { 495 if (!kref_get_unless_zero(&fb->refcount)) 496 fb = NULL; 497 } 498 mutex_unlock(&dev->mode_config.fb_lock); 499 500 return fb; 501 } 502 EXPORT_SYMBOL(drm_framebuffer_lookup); 503 504 /** 505 * drm_framebuffer_unreference - unref a framebuffer 506 * @fb: framebuffer to unref 507 * 508 * This functions decrements the fb's refcount and frees it if it drops to zero. 509 */ 510 void drm_framebuffer_unreference(struct drm_framebuffer *fb) 511 { 512 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 513 kref_put(&fb->refcount, drm_framebuffer_free); 514 } 515 EXPORT_SYMBOL(drm_framebuffer_unreference); 516 517 /** 518 * drm_framebuffer_reference - incr the fb refcnt 519 * @fb: framebuffer 520 * 521 * This functions increments the fb's refcount. 522 */ 523 void drm_framebuffer_reference(struct drm_framebuffer *fb) 524 { 525 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 526 kref_get(&fb->refcount); 527 } 528 EXPORT_SYMBOL(drm_framebuffer_reference); 529 530 /** 531 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr 532 * @fb: fb to unregister 533 * 534 * Drivers need to call this when cleaning up driver-private framebuffers, e.g. 535 * those used for fbdev. Note that the caller must hold a reference of it's own, 536 * i.e. the object may not be destroyed through this call (since it'll lead to a 537 * locking inversion). 538 */ 539 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) 540 { 541 struct drm_device *dev = fb->dev; 542 543 mutex_lock(&dev->mode_config.fb_lock); 544 /* Mark fb as reaped and drop idr ref. */ 545 __drm_framebuffer_unregister(dev, fb); 546 mutex_unlock(&dev->mode_config.fb_lock); 547 } 548 EXPORT_SYMBOL(drm_framebuffer_unregister_private); 549 550 /** 551 * drm_framebuffer_cleanup - remove a framebuffer object 552 * @fb: framebuffer to remove 553 * 554 * Cleanup framebuffer. This function is intended to be used from the drivers 555 * ->destroy callback. It can also be used to clean up driver private 556 * framebuffers embedded into a larger structure. 557 * 558 * Note that this function does not remove the fb from active usuage - if it is 559 * still used anywhere, hilarity can ensue since userspace could call getfb on 560 * the id and get back -EINVAL. Obviously no concern at driver unload time. 561 * 562 * Also, the framebuffer will not be removed from the lookup idr - for 563 * user-created framebuffers this will happen in in the rmfb ioctl. For 564 * driver-private objects (e.g. for fbdev) drivers need to explicitly call 565 * drm_framebuffer_unregister_private. 566 */ 567 void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 568 { 569 struct drm_device *dev = fb->dev; 570 571 mutex_lock(&dev->mode_config.fb_lock); 572 list_del(&fb->head); 573 dev->mode_config.num_fb--; 574 mutex_unlock(&dev->mode_config.fb_lock); 575 } 576 EXPORT_SYMBOL(drm_framebuffer_cleanup); 577 578 /** 579 * drm_framebuffer_remove - remove and unreference a framebuffer object 580 * @fb: framebuffer to remove 581 * 582 * Scans all the CRTCs and planes in @dev's mode_config. If they're 583 * using @fb, removes it, setting it to NULL. Then drops the reference to the 584 * passed-in framebuffer. Might take the modeset locks. 585 * 586 * Note that this function optimizes the cleanup away if the caller holds the 587 * last reference to the framebuffer. It is also guaranteed to not take the 588 * modeset locks in this case. 589 */ 590 void drm_framebuffer_remove(struct drm_framebuffer *fb) 591 { 592 struct drm_device *dev = fb->dev; 593 struct drm_crtc *crtc; 594 struct drm_plane *plane; 595 struct drm_mode_set set; 596 int ret; 597 598 WARN_ON(!list_empty(&fb->filp_head)); 599 600 /* 601 * drm ABI mandates that we remove any deleted framebuffers from active 602 * useage. But since most sane clients only remove framebuffers they no 603 * longer need, try to optimize this away. 604 * 605 * Since we're holding a reference ourselves, observing a refcount of 1 606 * means that we're the last holder and can skip it. Also, the refcount 607 * can never increase from 1 again, so we don't need any barriers or 608 * locks. 609 * 610 * Note that userspace could try to race with use and instate a new 611 * usage _after_ we've cleared all current ones. End result will be an 612 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot 613 * in this manner. 614 */ 615 if (atomic_read(&fb->refcount.refcount) > 1) { 616 drm_modeset_lock_all(dev); 617 /* remove from any CRTC */ 618 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 619 if (crtc->primary->fb == fb) { 620 /* should turn off the crtc */ 621 memset(&set, 0, sizeof(struct drm_mode_set)); 622 set.crtc = crtc; 623 set.fb = NULL; 624 ret = drm_mode_set_config_internal(&set); 625 if (ret) 626 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); 627 } 628 } 629 630 list_for_each_entry(plane, &dev->mode_config.plane_list, head) { 631 if (plane->fb == fb) 632 drm_plane_force_disable(plane); 633 } 634 drm_modeset_unlock_all(dev); 635 } 636 637 drm_framebuffer_unreference(fb); 638 } 639 EXPORT_SYMBOL(drm_framebuffer_remove); 640 641 DEFINE_WW_CLASS(crtc_ww_class); 642 643 /** 644 * drm_crtc_init_with_planes - Initialise a new CRTC object with 645 * specified primary and cursor planes. 646 * @dev: DRM device 647 * @crtc: CRTC object to init 648 * @primary: Primary plane for CRTC 649 * @cursor: Cursor plane for CRTC 650 * @funcs: callbacks for the new CRTC 651 * 652 * Inits a new object created as base part of a driver crtc object. 653 * 654 * Returns: 655 * Zero on success, error code on failure. 656 */ 657 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 658 struct drm_plane *primary, 659 struct drm_plane *cursor, 660 const struct drm_crtc_funcs *funcs) 661 { 662 struct drm_mode_config *config = &dev->mode_config; 663 int ret; 664 665 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); 666 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); 667 668 crtc->dev = dev; 669 crtc->funcs = funcs; 670 crtc->invert_dimensions = false; 671 672 drm_modeset_lock_init(&crtc->mutex); 673 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 674 if (ret) 675 return ret; 676 677 crtc->base.properties = &crtc->properties; 678 679 list_add_tail(&crtc->head, &config->crtc_list); 680 config->num_crtc++; 681 682 crtc->primary = primary; 683 crtc->cursor = cursor; 684 if (primary) 685 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 686 if (cursor) 687 cursor->possible_crtcs = 1 << drm_crtc_index(crtc); 688 689 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 690 drm_object_attach_property(&crtc->base, config->prop_active, 0); 691 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); 692 } 693 694 return 0; 695 } 696 EXPORT_SYMBOL(drm_crtc_init_with_planes); 697 698 /** 699 * drm_crtc_cleanup - Clean up the core crtc usage 700 * @crtc: CRTC to cleanup 701 * 702 * This function cleans up @crtc and removes it from the DRM mode setting 703 * core. Note that the function does *not* free the crtc structure itself, 704 * this is the responsibility of the caller. 705 */ 706 void drm_crtc_cleanup(struct drm_crtc *crtc) 707 { 708 struct drm_device *dev = crtc->dev; 709 710 kfree(crtc->gamma_store); 711 crtc->gamma_store = NULL; 712 713 drm_modeset_lock_fini(&crtc->mutex); 714 715 drm_mode_object_put(dev, &crtc->base); 716 list_del(&crtc->head); 717 dev->mode_config.num_crtc--; 718 719 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); 720 if (crtc->state && crtc->funcs->atomic_destroy_state) 721 crtc->funcs->atomic_destroy_state(crtc, crtc->state); 722 723 memset(crtc, 0, sizeof(*crtc)); 724 } 725 EXPORT_SYMBOL(drm_crtc_cleanup); 726 727 /** 728 * drm_crtc_index - find the index of a registered CRTC 729 * @crtc: CRTC to find index for 730 * 731 * Given a registered CRTC, return the index of that CRTC within a DRM 732 * device's list of CRTCs. 733 */ 734 unsigned int drm_crtc_index(struct drm_crtc *crtc) 735 { 736 unsigned int index = 0; 737 struct drm_crtc *tmp; 738 739 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { 740 if (tmp == crtc) 741 return index; 742 743 index++; 744 } 745 746 BUG(); 747 } 748 EXPORT_SYMBOL(drm_crtc_index); 749 750 /* 751 * drm_mode_remove - remove and free a mode 752 * @connector: connector list to modify 753 * @mode: mode to remove 754 * 755 * Remove @mode from @connector's mode list, then free it. 756 */ 757 static void drm_mode_remove(struct drm_connector *connector, 758 struct drm_display_mode *mode) 759 { 760 list_del(&mode->head); 761 drm_mode_destroy(connector->dev, mode); 762 } 763 764 /** 765 * drm_display_info_set_bus_formats - set the supported bus formats 766 * @info: display info to store bus formats in 767 * @formats: array containing the supported bus formats 768 * @num_formats: the number of entries in the fmts array 769 * 770 * Store the supported bus formats in display info structure. 771 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for 772 * a full list of available formats. 773 */ 774 int drm_display_info_set_bus_formats(struct drm_display_info *info, 775 const u32 *formats, 776 unsigned int num_formats) 777 { 778 u32 *fmts = NULL; 779 780 if (!formats && num_formats) 781 return -EINVAL; 782 783 if (formats && num_formats) { 784 fmts = kmemdup(formats, sizeof(*formats) * num_formats, 785 GFP_KERNEL); 786 if (!fmts) 787 return -ENOMEM; 788 } 789 790 kfree(info->bus_formats); 791 info->bus_formats = fmts; 792 info->num_bus_formats = num_formats; 793 794 return 0; 795 } 796 EXPORT_SYMBOL(drm_display_info_set_bus_formats); 797 798 /** 799 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 800 * @connector: connector to quwery 801 * 802 * The kernel supports per-connector configration of its consoles through 803 * use of the video= parameter. This function parses that option and 804 * extracts the user's specified mode (or enable/disable status) for a 805 * particular connector. This is typically only used during the early fbdev 806 * setup. 807 */ 808 static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 809 { 810 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 811 char *option = NULL; 812 813 if (fb_get_options(connector->name, &option)) 814 return; 815 816 if (!drm_mode_parse_command_line_for_connector(option, 817 connector, 818 mode)) 819 return; 820 821 if (mode->force) { 822 const char *s; 823 824 switch (mode->force) { 825 case DRM_FORCE_OFF: 826 s = "OFF"; 827 break; 828 case DRM_FORCE_ON_DIGITAL: 829 s = "ON - dig"; 830 break; 831 default: 832 case DRM_FORCE_ON: 833 s = "ON"; 834 break; 835 } 836 837 DRM_INFO("forcing %s connector %s\n", connector->name, s); 838 connector->force = mode->force; 839 } 840 841 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 842 connector->name, 843 mode->xres, mode->yres, 844 mode->refresh_specified ? mode->refresh : 60, 845 mode->rb ? " reduced blanking" : "", 846 mode->margins ? " with margins" : "", 847 mode->interlace ? " interlaced" : ""); 848 } 849 850 /** 851 * drm_connector_init - Init a preallocated connector 852 * @dev: DRM device 853 * @connector: the connector to init 854 * @funcs: callbacks for this connector 855 * @connector_type: user visible type of the connector 856 * 857 * Initialises a preallocated connector. Connectors should be 858 * subclassed as part of driver connector objects. 859 * 860 * Returns: 861 * Zero on success, error code on failure. 862 */ 863 int drm_connector_init(struct drm_device *dev, 864 struct drm_connector *connector, 865 const struct drm_connector_funcs *funcs, 866 int connector_type) 867 { 868 struct drm_mode_config *config = &dev->mode_config; 869 int ret; 870 struct ida *connector_ida = 871 &drm_connector_enum_list[connector_type].ida; 872 873 drm_modeset_lock_all(dev); 874 875 ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false); 876 if (ret) 877 goto out_unlock; 878 879 connector->base.properties = &connector->properties; 880 connector->dev = dev; 881 connector->funcs = funcs; 882 connector->connector_type = connector_type; 883 connector->connector_type_id = 884 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); 885 if (connector->connector_type_id < 0) { 886 ret = connector->connector_type_id; 887 goto out_put; 888 } 889 connector->name = 890 kasprintf(GFP_KERNEL, "%s-%d", 891 drm_connector_enum_list[connector_type].name, 892 connector->connector_type_id); 893 if (!connector->name) { 894 ret = -ENOMEM; 895 goto out_put; 896 } 897 898 INIT_LIST_HEAD(&connector->probed_modes); 899 INIT_LIST_HEAD(&connector->modes); 900 connector->edid_blob_ptr = NULL; 901 connector->status = connector_status_unknown; 902 903 drm_connector_get_cmdline_mode(connector); 904 905 /* We should add connectors at the end to avoid upsetting the connector 906 * index too much. */ 907 list_add_tail(&connector->head, &config->connector_list); 908 config->num_connector++; 909 910 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 911 drm_object_attach_property(&connector->base, 912 config->edid_property, 913 0); 914 915 drm_object_attach_property(&connector->base, 916 config->dpms_property, 0); 917 918 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 919 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); 920 } 921 922 connector->debugfs_entry = NULL; 923 924 out_put: 925 if (ret) 926 drm_mode_object_put(dev, &connector->base); 927 928 out_unlock: 929 drm_modeset_unlock_all(dev); 930 931 return ret; 932 } 933 EXPORT_SYMBOL(drm_connector_init); 934 935 /** 936 * drm_connector_cleanup - cleans up an initialised connector 937 * @connector: connector to cleanup 938 * 939 * Cleans up the connector but doesn't free the object. 940 */ 941 void drm_connector_cleanup(struct drm_connector *connector) 942 { 943 struct drm_device *dev = connector->dev; 944 struct drm_display_mode *mode, *t; 945 946 if (connector->tile_group) { 947 drm_mode_put_tile_group(dev, connector->tile_group); 948 connector->tile_group = NULL; 949 } 950 951 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 952 drm_mode_remove(connector, mode); 953 954 list_for_each_entry_safe(mode, t, &connector->modes, head) 955 drm_mode_remove(connector, mode); 956 957 ida_remove(&drm_connector_enum_list[connector->connector_type].ida, 958 connector->connector_type_id); 959 960 kfree(connector->display_info.bus_formats); 961 drm_mode_object_put(dev, &connector->base); 962 kfree(connector->name); 963 connector->name = NULL; 964 list_del(&connector->head); 965 dev->mode_config.num_connector--; 966 967 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 968 if (connector->state && connector->funcs->atomic_destroy_state) 969 connector->funcs->atomic_destroy_state(connector, 970 connector->state); 971 972 memset(connector, 0, sizeof(*connector)); 973 } 974 EXPORT_SYMBOL(drm_connector_cleanup); 975 976 /** 977 * drm_connector_index - find the index of a registered connector 978 * @connector: connector to find index for 979 * 980 * Given a registered connector, return the index of that connector within a DRM 981 * device's list of connectors. 982 */ 983 unsigned int drm_connector_index(struct drm_connector *connector) 984 { 985 unsigned int index = 0; 986 struct drm_connector *tmp; 987 struct drm_mode_config *config = &connector->dev->mode_config; 988 989 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 990 991 list_for_each_entry(tmp, &connector->dev->mode_config.connector_list, head) { 992 if (tmp == connector) 993 return index; 994 995 index++; 996 } 997 998 BUG(); 999 } 1000 EXPORT_SYMBOL(drm_connector_index); 1001 1002 /** 1003 * drm_connector_register - register a connector 1004 * @connector: the connector to register 1005 * 1006 * Register userspace interfaces for a connector 1007 * 1008 * Returns: 1009 * Zero on success, error code on failure. 1010 */ 1011 int drm_connector_register(struct drm_connector *connector) 1012 { 1013 int ret; 1014 1015 drm_mode_object_register(connector->dev, &connector->base); 1016 1017 ret = drm_sysfs_connector_add(connector); 1018 if (ret) 1019 return ret; 1020 1021 ret = drm_debugfs_connector_add(connector); 1022 if (ret) { 1023 drm_sysfs_connector_remove(connector); 1024 return ret; 1025 } 1026 1027 return 0; 1028 } 1029 EXPORT_SYMBOL(drm_connector_register); 1030 1031 /** 1032 * drm_connector_unregister - unregister a connector 1033 * @connector: the connector to unregister 1034 * 1035 * Unregister userspace interfaces for a connector 1036 */ 1037 void drm_connector_unregister(struct drm_connector *connector) 1038 { 1039 drm_sysfs_connector_remove(connector); 1040 drm_debugfs_connector_remove(connector); 1041 } 1042 EXPORT_SYMBOL(drm_connector_unregister); 1043 1044 1045 /** 1046 * drm_connector_unplug_all - unregister connector userspace interfaces 1047 * @dev: drm device 1048 * 1049 * This function unregisters all connector userspace interfaces in sysfs. Should 1050 * be call when the device is disconnected, e.g. from an usb driver's 1051 * ->disconnect callback. 1052 */ 1053 void drm_connector_unplug_all(struct drm_device *dev) 1054 { 1055 struct drm_connector *connector; 1056 1057 /* taking the mode config mutex ends up in a clash with sysfs */ 1058 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1059 drm_connector_unregister(connector); 1060 1061 } 1062 EXPORT_SYMBOL(drm_connector_unplug_all); 1063 1064 /** 1065 * drm_encoder_init - Init a preallocated encoder 1066 * @dev: drm device 1067 * @encoder: the encoder to init 1068 * @funcs: callbacks for this encoder 1069 * @encoder_type: user visible type of the encoder 1070 * 1071 * Initialises a preallocated encoder. Encoder should be 1072 * subclassed as part of driver encoder objects. 1073 * 1074 * Returns: 1075 * Zero on success, error code on failure. 1076 */ 1077 int drm_encoder_init(struct drm_device *dev, 1078 struct drm_encoder *encoder, 1079 const struct drm_encoder_funcs *funcs, 1080 int encoder_type) 1081 { 1082 int ret; 1083 1084 drm_modeset_lock_all(dev); 1085 1086 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1087 if (ret) 1088 goto out_unlock; 1089 1090 encoder->dev = dev; 1091 encoder->encoder_type = encoder_type; 1092 encoder->funcs = funcs; 1093 encoder->name = kasprintf(GFP_KERNEL, "%s-%d", 1094 drm_encoder_enum_list[encoder_type].name, 1095 encoder->base.id); 1096 if (!encoder->name) { 1097 ret = -ENOMEM; 1098 goto out_put; 1099 } 1100 1101 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1102 dev->mode_config.num_encoder++; 1103 1104 out_put: 1105 if (ret) 1106 drm_mode_object_put(dev, &encoder->base); 1107 1108 out_unlock: 1109 drm_modeset_unlock_all(dev); 1110 1111 return ret; 1112 } 1113 EXPORT_SYMBOL(drm_encoder_init); 1114 1115 /** 1116 * drm_encoder_cleanup - cleans up an initialised encoder 1117 * @encoder: encoder to cleanup 1118 * 1119 * Cleans up the encoder but doesn't free the object. 1120 */ 1121 void drm_encoder_cleanup(struct drm_encoder *encoder) 1122 { 1123 struct drm_device *dev = encoder->dev; 1124 1125 drm_modeset_lock_all(dev); 1126 drm_mode_object_put(dev, &encoder->base); 1127 kfree(encoder->name); 1128 list_del(&encoder->head); 1129 dev->mode_config.num_encoder--; 1130 drm_modeset_unlock_all(dev); 1131 1132 memset(encoder, 0, sizeof(*encoder)); 1133 } 1134 EXPORT_SYMBOL(drm_encoder_cleanup); 1135 1136 /** 1137 * drm_universal_plane_init - Initialize a new universal plane object 1138 * @dev: DRM device 1139 * @plane: plane object to init 1140 * @possible_crtcs: bitmask of possible CRTCs 1141 * @funcs: callbacks for the new plane 1142 * @formats: array of supported formats (%DRM_FORMAT_*) 1143 * @format_count: number of elements in @formats 1144 * @type: type of plane (overlay, primary, cursor) 1145 * 1146 * Initializes a plane object of type @type. 1147 * 1148 * Returns: 1149 * Zero on success, error code on failure. 1150 */ 1151 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1152 unsigned long possible_crtcs, 1153 const struct drm_plane_funcs *funcs, 1154 const uint32_t *formats, uint32_t format_count, 1155 enum drm_plane_type type) 1156 { 1157 struct drm_mode_config *config = &dev->mode_config; 1158 int ret; 1159 1160 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1161 if (ret) 1162 return ret; 1163 1164 drm_modeset_lock_init(&plane->mutex); 1165 1166 plane->base.properties = &plane->properties; 1167 plane->dev = dev; 1168 plane->funcs = funcs; 1169 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t), 1170 GFP_KERNEL); 1171 if (!plane->format_types) { 1172 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1173 drm_mode_object_put(dev, &plane->base); 1174 return -ENOMEM; 1175 } 1176 1177 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1178 plane->format_count = format_count; 1179 plane->possible_crtcs = possible_crtcs; 1180 plane->type = type; 1181 1182 list_add_tail(&plane->head, &config->plane_list); 1183 config->num_total_plane++; 1184 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1185 config->num_overlay_plane++; 1186 1187 drm_object_attach_property(&plane->base, 1188 config->plane_type_property, 1189 plane->type); 1190 1191 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 1192 drm_object_attach_property(&plane->base, config->prop_fb_id, 0); 1193 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); 1194 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); 1195 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); 1196 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); 1197 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); 1198 drm_object_attach_property(&plane->base, config->prop_src_x, 0); 1199 drm_object_attach_property(&plane->base, config->prop_src_y, 0); 1200 drm_object_attach_property(&plane->base, config->prop_src_w, 0); 1201 drm_object_attach_property(&plane->base, config->prop_src_h, 0); 1202 } 1203 1204 return 0; 1205 } 1206 EXPORT_SYMBOL(drm_universal_plane_init); 1207 1208 /** 1209 * drm_plane_init - Initialize a legacy plane 1210 * @dev: DRM device 1211 * @plane: plane object to init 1212 * @possible_crtcs: bitmask of possible CRTCs 1213 * @funcs: callbacks for the new plane 1214 * @formats: array of supported formats (%DRM_FORMAT_*) 1215 * @format_count: number of elements in @formats 1216 * @is_primary: plane type (primary vs overlay) 1217 * 1218 * Legacy API to initialize a DRM plane. 1219 * 1220 * New drivers should call drm_universal_plane_init() instead. 1221 * 1222 * Returns: 1223 * Zero on success, error code on failure. 1224 */ 1225 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1226 unsigned long possible_crtcs, 1227 const struct drm_plane_funcs *funcs, 1228 const uint32_t *formats, uint32_t format_count, 1229 bool is_primary) 1230 { 1231 enum drm_plane_type type; 1232 1233 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1234 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1235 formats, format_count, type); 1236 } 1237 EXPORT_SYMBOL(drm_plane_init); 1238 1239 /** 1240 * drm_plane_cleanup - Clean up the core plane usage 1241 * @plane: plane to cleanup 1242 * 1243 * This function cleans up @plane and removes it from the DRM mode setting 1244 * core. Note that the function does *not* free the plane structure itself, 1245 * this is the responsibility of the caller. 1246 */ 1247 void drm_plane_cleanup(struct drm_plane *plane) 1248 { 1249 struct drm_device *dev = plane->dev; 1250 1251 drm_modeset_lock_all(dev); 1252 kfree(plane->format_types); 1253 drm_mode_object_put(dev, &plane->base); 1254 1255 BUG_ON(list_empty(&plane->head)); 1256 1257 list_del(&plane->head); 1258 dev->mode_config.num_total_plane--; 1259 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1260 dev->mode_config.num_overlay_plane--; 1261 drm_modeset_unlock_all(dev); 1262 1263 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1264 if (plane->state && plane->funcs->atomic_destroy_state) 1265 plane->funcs->atomic_destroy_state(plane, plane->state); 1266 1267 memset(plane, 0, sizeof(*plane)); 1268 } 1269 EXPORT_SYMBOL(drm_plane_cleanup); 1270 1271 /** 1272 * drm_plane_index - find the index of a registered plane 1273 * @plane: plane to find index for 1274 * 1275 * Given a registered plane, return the index of that CRTC within a DRM 1276 * device's list of planes. 1277 */ 1278 unsigned int drm_plane_index(struct drm_plane *plane) 1279 { 1280 unsigned int index = 0; 1281 struct drm_plane *tmp; 1282 1283 list_for_each_entry(tmp, &plane->dev->mode_config.plane_list, head) { 1284 if (tmp == plane) 1285 return index; 1286 1287 index++; 1288 } 1289 1290 BUG(); 1291 } 1292 EXPORT_SYMBOL(drm_plane_index); 1293 1294 /** 1295 * drm_plane_from_index - find the registered plane at an index 1296 * @dev: DRM device 1297 * @idx: index of registered plane to find for 1298 * 1299 * Given a plane index, return the registered plane from DRM device's 1300 * list of planes with matching index. 1301 */ 1302 struct drm_plane * 1303 drm_plane_from_index(struct drm_device *dev, int idx) 1304 { 1305 struct drm_plane *plane; 1306 unsigned int i = 0; 1307 1308 list_for_each_entry(plane, &dev->mode_config.plane_list, head) { 1309 if (i == idx) 1310 return plane; 1311 i++; 1312 } 1313 return NULL; 1314 } 1315 EXPORT_SYMBOL(drm_plane_from_index); 1316 1317 /** 1318 * drm_plane_force_disable - Forcibly disable a plane 1319 * @plane: plane to disable 1320 * 1321 * Forces the plane to be disabled. 1322 * 1323 * Used when the plane's current framebuffer is destroyed, 1324 * and when restoring fbdev mode. 1325 */ 1326 void drm_plane_force_disable(struct drm_plane *plane) 1327 { 1328 int ret; 1329 1330 if (!plane->fb) 1331 return; 1332 1333 plane->old_fb = plane->fb; 1334 ret = plane->funcs->disable_plane(plane); 1335 if (ret) { 1336 DRM_ERROR("failed to disable plane with busy fb\n"); 1337 plane->old_fb = NULL; 1338 return; 1339 } 1340 /* disconnect the plane from the fb and crtc: */ 1341 drm_framebuffer_unreference(plane->old_fb); 1342 plane->old_fb = NULL; 1343 plane->fb = NULL; 1344 plane->crtc = NULL; 1345 } 1346 EXPORT_SYMBOL(drm_plane_force_disable); 1347 1348 static int drm_mode_create_standard_properties(struct drm_device *dev) 1349 { 1350 struct drm_property *prop; 1351 1352 /* 1353 * Standard properties (apply to all connectors) 1354 */ 1355 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1356 DRM_MODE_PROP_IMMUTABLE, 1357 "EDID", 0); 1358 if (!prop) 1359 return -ENOMEM; 1360 dev->mode_config.edid_property = prop; 1361 1362 prop = drm_property_create_enum(dev, 0, 1363 "DPMS", drm_dpms_enum_list, 1364 ARRAY_SIZE(drm_dpms_enum_list)); 1365 if (!prop) 1366 return -ENOMEM; 1367 dev->mode_config.dpms_property = prop; 1368 1369 prop = drm_property_create(dev, 1370 DRM_MODE_PROP_BLOB | 1371 DRM_MODE_PROP_IMMUTABLE, 1372 "PATH", 0); 1373 if (!prop) 1374 return -ENOMEM; 1375 dev->mode_config.path_property = prop; 1376 1377 prop = drm_property_create(dev, 1378 DRM_MODE_PROP_BLOB | 1379 DRM_MODE_PROP_IMMUTABLE, 1380 "TILE", 0); 1381 if (!prop) 1382 return -ENOMEM; 1383 dev->mode_config.tile_property = prop; 1384 1385 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1386 "type", drm_plane_type_enum_list, 1387 ARRAY_SIZE(drm_plane_type_enum_list)); 1388 if (!prop) 1389 return -ENOMEM; 1390 dev->mode_config.plane_type_property = prop; 1391 1392 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1393 "SRC_X", 0, UINT_MAX); 1394 if (!prop) 1395 return -ENOMEM; 1396 dev->mode_config.prop_src_x = prop; 1397 1398 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1399 "SRC_Y", 0, UINT_MAX); 1400 if (!prop) 1401 return -ENOMEM; 1402 dev->mode_config.prop_src_y = prop; 1403 1404 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1405 "SRC_W", 0, UINT_MAX); 1406 if (!prop) 1407 return -ENOMEM; 1408 dev->mode_config.prop_src_w = prop; 1409 1410 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1411 "SRC_H", 0, UINT_MAX); 1412 if (!prop) 1413 return -ENOMEM; 1414 dev->mode_config.prop_src_h = prop; 1415 1416 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1417 "CRTC_X", INT_MIN, INT_MAX); 1418 if (!prop) 1419 return -ENOMEM; 1420 dev->mode_config.prop_crtc_x = prop; 1421 1422 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1423 "CRTC_Y", INT_MIN, INT_MAX); 1424 if (!prop) 1425 return -ENOMEM; 1426 dev->mode_config.prop_crtc_y = prop; 1427 1428 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1429 "CRTC_W", 0, INT_MAX); 1430 if (!prop) 1431 return -ENOMEM; 1432 dev->mode_config.prop_crtc_w = prop; 1433 1434 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1435 "CRTC_H", 0, INT_MAX); 1436 if (!prop) 1437 return -ENOMEM; 1438 dev->mode_config.prop_crtc_h = prop; 1439 1440 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1441 "FB_ID", DRM_MODE_OBJECT_FB); 1442 if (!prop) 1443 return -ENOMEM; 1444 dev->mode_config.prop_fb_id = prop; 1445 1446 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1447 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 1448 if (!prop) 1449 return -ENOMEM; 1450 dev->mode_config.prop_crtc_id = prop; 1451 1452 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 1453 "ACTIVE"); 1454 if (!prop) 1455 return -ENOMEM; 1456 dev->mode_config.prop_active = prop; 1457 1458 prop = drm_property_create(dev, 1459 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 1460 "MODE_ID", 0); 1461 if (!prop) 1462 return -ENOMEM; 1463 dev->mode_config.prop_mode_id = prop; 1464 1465 return 0; 1466 } 1467 1468 /** 1469 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1470 * @dev: DRM device 1471 * 1472 * Called by a driver the first time a DVI-I connector is made. 1473 */ 1474 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1475 { 1476 struct drm_property *dvi_i_selector; 1477 struct drm_property *dvi_i_subconnector; 1478 1479 if (dev->mode_config.dvi_i_select_subconnector_property) 1480 return 0; 1481 1482 dvi_i_selector = 1483 drm_property_create_enum(dev, 0, 1484 "select subconnector", 1485 drm_dvi_i_select_enum_list, 1486 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1487 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1488 1489 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1490 "subconnector", 1491 drm_dvi_i_subconnector_enum_list, 1492 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1493 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1494 1495 return 0; 1496 } 1497 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1498 1499 /** 1500 * drm_create_tv_properties - create TV specific connector properties 1501 * @dev: DRM device 1502 * @num_modes: number of different TV formats (modes) supported 1503 * @modes: array of pointers to strings containing name of each format 1504 * 1505 * Called by a driver's TV initialization routine, this function creates 1506 * the TV specific connector properties for a given device. Caller is 1507 * responsible for allocating a list of format names and passing them to 1508 * this routine. 1509 */ 1510 int drm_mode_create_tv_properties(struct drm_device *dev, 1511 unsigned int num_modes, 1512 char *modes[]) 1513 { 1514 struct drm_property *tv_selector; 1515 struct drm_property *tv_subconnector; 1516 unsigned int i; 1517 1518 if (dev->mode_config.tv_select_subconnector_property) 1519 return 0; 1520 1521 /* 1522 * Basic connector properties 1523 */ 1524 tv_selector = drm_property_create_enum(dev, 0, 1525 "select subconnector", 1526 drm_tv_select_enum_list, 1527 ARRAY_SIZE(drm_tv_select_enum_list)); 1528 dev->mode_config.tv_select_subconnector_property = tv_selector; 1529 1530 tv_subconnector = 1531 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1532 "subconnector", 1533 drm_tv_subconnector_enum_list, 1534 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1535 dev->mode_config.tv_subconnector_property = tv_subconnector; 1536 1537 /* 1538 * Other, TV specific properties: margins & TV modes. 1539 */ 1540 dev->mode_config.tv_left_margin_property = 1541 drm_property_create_range(dev, 0, "left margin", 0, 100); 1542 1543 dev->mode_config.tv_right_margin_property = 1544 drm_property_create_range(dev, 0, "right margin", 0, 100); 1545 1546 dev->mode_config.tv_top_margin_property = 1547 drm_property_create_range(dev, 0, "top margin", 0, 100); 1548 1549 dev->mode_config.tv_bottom_margin_property = 1550 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1551 1552 dev->mode_config.tv_mode_property = 1553 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1554 "mode", num_modes); 1555 for (i = 0; i < num_modes; i++) 1556 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1557 i, modes[i]); 1558 1559 dev->mode_config.tv_brightness_property = 1560 drm_property_create_range(dev, 0, "brightness", 0, 100); 1561 1562 dev->mode_config.tv_contrast_property = 1563 drm_property_create_range(dev, 0, "contrast", 0, 100); 1564 1565 dev->mode_config.tv_flicker_reduction_property = 1566 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1567 1568 dev->mode_config.tv_overscan_property = 1569 drm_property_create_range(dev, 0, "overscan", 0, 100); 1570 1571 dev->mode_config.tv_saturation_property = 1572 drm_property_create_range(dev, 0, "saturation", 0, 100); 1573 1574 dev->mode_config.tv_hue_property = 1575 drm_property_create_range(dev, 0, "hue", 0, 100); 1576 1577 return 0; 1578 } 1579 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1580 1581 /** 1582 * drm_mode_create_scaling_mode_property - create scaling mode property 1583 * @dev: DRM device 1584 * 1585 * Called by a driver the first time it's needed, must be attached to desired 1586 * connectors. 1587 */ 1588 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1589 { 1590 struct drm_property *scaling_mode; 1591 1592 if (dev->mode_config.scaling_mode_property) 1593 return 0; 1594 1595 scaling_mode = 1596 drm_property_create_enum(dev, 0, "scaling mode", 1597 drm_scaling_mode_enum_list, 1598 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1599 1600 dev->mode_config.scaling_mode_property = scaling_mode; 1601 1602 return 0; 1603 } 1604 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1605 1606 /** 1607 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1608 * @dev: DRM device 1609 * 1610 * Called by a driver the first time it's needed, must be attached to desired 1611 * connectors. 1612 * 1613 * Returns: 1614 * Zero on success, negative errno on failure. 1615 */ 1616 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1617 { 1618 if (dev->mode_config.aspect_ratio_property) 1619 return 0; 1620 1621 dev->mode_config.aspect_ratio_property = 1622 drm_property_create_enum(dev, 0, "aspect ratio", 1623 drm_aspect_ratio_enum_list, 1624 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1625 1626 if (dev->mode_config.aspect_ratio_property == NULL) 1627 return -ENOMEM; 1628 1629 return 0; 1630 } 1631 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1632 1633 /** 1634 * drm_mode_create_dirty_property - create dirty property 1635 * @dev: DRM device 1636 * 1637 * Called by a driver the first time it's needed, must be attached to desired 1638 * connectors. 1639 */ 1640 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1641 { 1642 struct drm_property *dirty_info; 1643 1644 if (dev->mode_config.dirty_info_property) 1645 return 0; 1646 1647 dirty_info = 1648 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1649 "dirty", 1650 drm_dirty_info_enum_list, 1651 ARRAY_SIZE(drm_dirty_info_enum_list)); 1652 dev->mode_config.dirty_info_property = dirty_info; 1653 1654 return 0; 1655 } 1656 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1657 1658 /** 1659 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1660 * @dev: DRM device 1661 * 1662 * Create the the suggested x/y offset property for connectors. 1663 */ 1664 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1665 { 1666 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1667 return 0; 1668 1669 dev->mode_config.suggested_x_property = 1670 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1671 1672 dev->mode_config.suggested_y_property = 1673 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1674 1675 if (dev->mode_config.suggested_x_property == NULL || 1676 dev->mode_config.suggested_y_property == NULL) 1677 return -ENOMEM; 1678 return 0; 1679 } 1680 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1681 1682 static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group) 1683 { 1684 uint32_t total_objects = 0; 1685 1686 total_objects += dev->mode_config.num_crtc; 1687 total_objects += dev->mode_config.num_connector; 1688 total_objects += dev->mode_config.num_encoder; 1689 1690 group->id_list = kcalloc(total_objects, sizeof(uint32_t), GFP_KERNEL); 1691 if (!group->id_list) 1692 return -ENOMEM; 1693 1694 group->num_crtcs = 0; 1695 group->num_connectors = 0; 1696 group->num_encoders = 0; 1697 return 0; 1698 } 1699 1700 void drm_mode_group_destroy(struct drm_mode_group *group) 1701 { 1702 kfree(group->id_list); 1703 group->id_list = NULL; 1704 } 1705 1706 /* 1707 * NOTE: Driver's shouldn't ever call drm_mode_group_init_legacy_group - it is 1708 * the drm core's responsibility to set up mode control groups. 1709 */ 1710 int drm_mode_group_init_legacy_group(struct drm_device *dev, 1711 struct drm_mode_group *group) 1712 { 1713 struct drm_crtc *crtc; 1714 struct drm_encoder *encoder; 1715 struct drm_connector *connector; 1716 int ret; 1717 1718 ret = drm_mode_group_init(dev, group); 1719 if (ret) 1720 return ret; 1721 1722 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 1723 group->id_list[group->num_crtcs++] = crtc->base.id; 1724 1725 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 1726 group->id_list[group->num_crtcs + group->num_encoders++] = 1727 encoder->base.id; 1728 1729 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1730 group->id_list[group->num_crtcs + group->num_encoders + 1731 group->num_connectors++] = connector->base.id; 1732 1733 return 0; 1734 } 1735 EXPORT_SYMBOL(drm_mode_group_init_legacy_group); 1736 1737 void drm_reinit_primary_mode_group(struct drm_device *dev) 1738 { 1739 drm_modeset_lock_all(dev); 1740 drm_mode_group_destroy(&dev->primary->mode_group); 1741 drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group); 1742 drm_modeset_unlock_all(dev); 1743 } 1744 EXPORT_SYMBOL(drm_reinit_primary_mode_group); 1745 1746 /** 1747 * drm_mode_getresources - get graphics configuration 1748 * @dev: drm device for the ioctl 1749 * @data: data pointer for the ioctl 1750 * @file_priv: drm file for the ioctl call 1751 * 1752 * Construct a set of configuration description structures and return 1753 * them to the user, including CRTC, connector and framebuffer configuration. 1754 * 1755 * Called by the user via ioctl. 1756 * 1757 * Returns: 1758 * Zero on success, negative errno on failure. 1759 */ 1760 int drm_mode_getresources(struct drm_device *dev, void *data, 1761 struct drm_file *file_priv) 1762 { 1763 struct drm_mode_card_res *card_res = data; 1764 struct list_head *lh; 1765 struct drm_framebuffer *fb; 1766 struct drm_connector *connector; 1767 struct drm_crtc *crtc; 1768 struct drm_encoder *encoder; 1769 int ret = 0; 1770 int connector_count = 0; 1771 int crtc_count = 0; 1772 int fb_count = 0; 1773 int encoder_count = 0; 1774 int copied = 0, i; 1775 uint32_t __user *fb_id; 1776 uint32_t __user *crtc_id; 1777 uint32_t __user *connector_id; 1778 uint32_t __user *encoder_id; 1779 struct drm_mode_group *mode_group; 1780 1781 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1782 return -EINVAL; 1783 1784 1785 mutex_lock(&file_priv->fbs_lock); 1786 /* 1787 * For the non-control nodes we need to limit the list of resources 1788 * by IDs in the group list for this node 1789 */ 1790 list_for_each(lh, &file_priv->fbs) 1791 fb_count++; 1792 1793 /* handle this in 4 parts */ 1794 /* FBs */ 1795 if (card_res->count_fbs >= fb_count) { 1796 copied = 0; 1797 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1798 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1799 if (put_user(fb->base.id, fb_id + copied)) { 1800 mutex_unlock(&file_priv->fbs_lock); 1801 return -EFAULT; 1802 } 1803 copied++; 1804 } 1805 } 1806 card_res->count_fbs = fb_count; 1807 mutex_unlock(&file_priv->fbs_lock); 1808 1809 /* mode_config.mutex protects the connector list against e.g. DP MST 1810 * connector hot-adding. CRTC/Plane lists are invariant. */ 1811 mutex_lock(&dev->mode_config.mutex); 1812 if (!drm_is_primary_client(file_priv)) { 1813 1814 mode_group = NULL; 1815 list_for_each(lh, &dev->mode_config.crtc_list) 1816 crtc_count++; 1817 1818 list_for_each(lh, &dev->mode_config.connector_list) 1819 connector_count++; 1820 1821 list_for_each(lh, &dev->mode_config.encoder_list) 1822 encoder_count++; 1823 } else { 1824 1825 mode_group = &file_priv->master->minor->mode_group; 1826 crtc_count = mode_group->num_crtcs; 1827 connector_count = mode_group->num_connectors; 1828 encoder_count = mode_group->num_encoders; 1829 } 1830 1831 card_res->max_height = dev->mode_config.max_height; 1832 card_res->min_height = dev->mode_config.min_height; 1833 card_res->max_width = dev->mode_config.max_width; 1834 card_res->min_width = dev->mode_config.min_width; 1835 1836 /* CRTCs */ 1837 if (card_res->count_crtcs >= crtc_count) { 1838 copied = 0; 1839 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1840 if (!mode_group) { 1841 list_for_each_entry(crtc, &dev->mode_config.crtc_list, 1842 head) { 1843 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 1844 if (put_user(crtc->base.id, crtc_id + copied)) { 1845 ret = -EFAULT; 1846 goto out; 1847 } 1848 copied++; 1849 } 1850 } else { 1851 for (i = 0; i < mode_group->num_crtcs; i++) { 1852 if (put_user(mode_group->id_list[i], 1853 crtc_id + copied)) { 1854 ret = -EFAULT; 1855 goto out; 1856 } 1857 copied++; 1858 } 1859 } 1860 } 1861 card_res->count_crtcs = crtc_count; 1862 1863 /* Encoders */ 1864 if (card_res->count_encoders >= encoder_count) { 1865 copied = 0; 1866 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1867 if (!mode_group) { 1868 list_for_each_entry(encoder, 1869 &dev->mode_config.encoder_list, 1870 head) { 1871 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1872 encoder->name); 1873 if (put_user(encoder->base.id, encoder_id + 1874 copied)) { 1875 ret = -EFAULT; 1876 goto out; 1877 } 1878 copied++; 1879 } 1880 } else { 1881 for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) { 1882 if (put_user(mode_group->id_list[i], 1883 encoder_id + copied)) { 1884 ret = -EFAULT; 1885 goto out; 1886 } 1887 copied++; 1888 } 1889 1890 } 1891 } 1892 card_res->count_encoders = encoder_count; 1893 1894 /* Connectors */ 1895 if (card_res->count_connectors >= connector_count) { 1896 copied = 0; 1897 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1898 if (!mode_group) { 1899 list_for_each_entry(connector, 1900 &dev->mode_config.connector_list, 1901 head) { 1902 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1903 connector->base.id, 1904 connector->name); 1905 if (put_user(connector->base.id, 1906 connector_id + copied)) { 1907 ret = -EFAULT; 1908 goto out; 1909 } 1910 copied++; 1911 } 1912 } else { 1913 int start = mode_group->num_crtcs + 1914 mode_group->num_encoders; 1915 for (i = start; i < start + mode_group->num_connectors; i++) { 1916 if (put_user(mode_group->id_list[i], 1917 connector_id + copied)) { 1918 ret = -EFAULT; 1919 goto out; 1920 } 1921 copied++; 1922 } 1923 } 1924 } 1925 card_res->count_connectors = connector_count; 1926 1927 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1928 card_res->count_connectors, card_res->count_encoders); 1929 1930 out: 1931 mutex_unlock(&dev->mode_config.mutex); 1932 return ret; 1933 } 1934 1935 /** 1936 * drm_mode_getcrtc - get CRTC configuration 1937 * @dev: drm device for the ioctl 1938 * @data: data pointer for the ioctl 1939 * @file_priv: drm file for the ioctl call 1940 * 1941 * Construct a CRTC configuration structure to return to the user. 1942 * 1943 * Called by the user via ioctl. 1944 * 1945 * Returns: 1946 * Zero on success, negative errno on failure. 1947 */ 1948 int drm_mode_getcrtc(struct drm_device *dev, 1949 void *data, struct drm_file *file_priv) 1950 { 1951 struct drm_mode_crtc *crtc_resp = data; 1952 struct drm_crtc *crtc; 1953 1954 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1955 return -EINVAL; 1956 1957 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 1958 if (!crtc) 1959 return -ENOENT; 1960 1961 drm_modeset_lock_crtc(crtc, crtc->primary); 1962 crtc_resp->gamma_size = crtc->gamma_size; 1963 if (crtc->primary->fb) 1964 crtc_resp->fb_id = crtc->primary->fb->base.id; 1965 else 1966 crtc_resp->fb_id = 0; 1967 1968 if (crtc->state) { 1969 crtc_resp->x = crtc->primary->state->src_x >> 16; 1970 crtc_resp->y = crtc->primary->state->src_y >> 16; 1971 if (crtc->state->enable) { 1972 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); 1973 crtc_resp->mode_valid = 1; 1974 1975 } else { 1976 crtc_resp->mode_valid = 0; 1977 } 1978 } else { 1979 crtc_resp->x = crtc->x; 1980 crtc_resp->y = crtc->y; 1981 if (crtc->enabled) { 1982 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); 1983 crtc_resp->mode_valid = 1; 1984 1985 } else { 1986 crtc_resp->mode_valid = 0; 1987 } 1988 } 1989 drm_modeset_unlock_crtc(crtc); 1990 1991 return 0; 1992 } 1993 1994 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 1995 const struct drm_file *file_priv) 1996 { 1997 /* 1998 * If user-space hasn't configured the driver to expose the stereo 3D 1999 * modes, don't expose them. 2000 */ 2001 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 2002 return false; 2003 2004 return true; 2005 } 2006 2007 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 2008 { 2009 /* For atomic drivers only state objects are synchronously updated and 2010 * protected by modeset locks, so check those first. */ 2011 if (connector->state) 2012 return connector->state->best_encoder; 2013 return connector->encoder; 2014 } 2015 2016 /* helper for getconnector and getproperties ioctls */ 2017 static int get_properties(struct drm_mode_object *obj, bool atomic, 2018 uint32_t __user *prop_ptr, uint64_t __user *prop_values, 2019 uint32_t *arg_count_props) 2020 { 2021 int props_count; 2022 int i, ret, copied; 2023 2024 props_count = obj->properties->count; 2025 if (!atomic) 2026 props_count -= obj->properties->atomic_count; 2027 2028 if ((*arg_count_props >= props_count) && props_count) { 2029 for (i = 0, copied = 0; copied < props_count; i++) { 2030 struct drm_property *prop = obj->properties->properties[i]; 2031 uint64_t val; 2032 2033 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) 2034 continue; 2035 2036 ret = drm_object_property_get_value(obj, prop, &val); 2037 if (ret) 2038 return ret; 2039 2040 if (put_user(prop->base.id, prop_ptr + copied)) 2041 return -EFAULT; 2042 2043 if (put_user(val, prop_values + copied)) 2044 return -EFAULT; 2045 2046 copied++; 2047 } 2048 } 2049 *arg_count_props = props_count; 2050 2051 return 0; 2052 } 2053 2054 /** 2055 * drm_mode_getconnector - get connector configuration 2056 * @dev: drm device for the ioctl 2057 * @data: data pointer for the ioctl 2058 * @file_priv: drm file for the ioctl call 2059 * 2060 * Construct a connector configuration structure to return to the user. 2061 * 2062 * Called by the user via ioctl. 2063 * 2064 * Returns: 2065 * Zero on success, negative errno on failure. 2066 */ 2067 int drm_mode_getconnector(struct drm_device *dev, void *data, 2068 struct drm_file *file_priv) 2069 { 2070 struct drm_mode_get_connector *out_resp = data; 2071 struct drm_connector *connector; 2072 struct drm_encoder *encoder; 2073 struct drm_display_mode *mode; 2074 int mode_count = 0; 2075 int encoders_count = 0; 2076 int ret = 0; 2077 int copied = 0; 2078 int i; 2079 struct drm_mode_modeinfo u_mode; 2080 struct drm_mode_modeinfo __user *mode_ptr; 2081 uint32_t __user *encoder_ptr; 2082 2083 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2084 return -EINVAL; 2085 2086 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2087 2088 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 2089 2090 mutex_lock(&dev->mode_config.mutex); 2091 2092 connector = drm_connector_find(dev, out_resp->connector_id); 2093 if (!connector) { 2094 ret = -ENOENT; 2095 goto out_unlock; 2096 } 2097 2098 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) 2099 if (connector->encoder_ids[i] != 0) 2100 encoders_count++; 2101 2102 if (out_resp->count_modes == 0) { 2103 connector->funcs->fill_modes(connector, 2104 dev->mode_config.max_width, 2105 dev->mode_config.max_height); 2106 } 2107 2108 /* delayed so we get modes regardless of pre-fill_modes state */ 2109 list_for_each_entry(mode, &connector->modes, head) 2110 if (drm_mode_expose_to_userspace(mode, file_priv)) 2111 mode_count++; 2112 2113 out_resp->connector_id = connector->base.id; 2114 out_resp->connector_type = connector->connector_type; 2115 out_resp->connector_type_id = connector->connector_type_id; 2116 out_resp->mm_width = connector->display_info.width_mm; 2117 out_resp->mm_height = connector->display_info.height_mm; 2118 out_resp->subpixel = connector->display_info.subpixel_order; 2119 out_resp->connection = connector->status; 2120 2121 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2122 encoder = drm_connector_get_encoder(connector); 2123 if (encoder) 2124 out_resp->encoder_id = encoder->base.id; 2125 else 2126 out_resp->encoder_id = 0; 2127 2128 /* 2129 * This ioctl is called twice, once to determine how much space is 2130 * needed, and the 2nd time to fill it. 2131 */ 2132 if ((out_resp->count_modes >= mode_count) && mode_count) { 2133 copied = 0; 2134 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2135 list_for_each_entry(mode, &connector->modes, head) { 2136 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2137 continue; 2138 2139 drm_mode_convert_to_umode(&u_mode, mode); 2140 if (copy_to_user(mode_ptr + copied, 2141 &u_mode, sizeof(u_mode))) { 2142 ret = -EFAULT; 2143 goto out; 2144 } 2145 copied++; 2146 } 2147 } 2148 out_resp->count_modes = mode_count; 2149 2150 ret = get_properties(&connector->base, file_priv->atomic, 2151 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2152 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2153 &out_resp->count_props); 2154 if (ret) 2155 goto out; 2156 2157 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2158 copied = 0; 2159 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2160 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2161 if (connector->encoder_ids[i] != 0) { 2162 if (put_user(connector->encoder_ids[i], 2163 encoder_ptr + copied)) { 2164 ret = -EFAULT; 2165 goto out; 2166 } 2167 copied++; 2168 } 2169 } 2170 } 2171 out_resp->count_encoders = encoders_count; 2172 2173 out: 2174 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2175 2176 out_unlock: 2177 mutex_unlock(&dev->mode_config.mutex); 2178 2179 return ret; 2180 } 2181 2182 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2183 { 2184 struct drm_connector *connector; 2185 struct drm_device *dev = encoder->dev; 2186 bool uses_atomic = false; 2187 2188 /* For atomic drivers only state objects are synchronously updated and 2189 * protected by modeset locks, so check those first. */ 2190 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 2191 if (!connector->state) 2192 continue; 2193 2194 uses_atomic = true; 2195 2196 if (connector->state->best_encoder != encoder) 2197 continue; 2198 2199 return connector->state->crtc; 2200 } 2201 2202 /* Don't return stale data (e.g. pending async disable). */ 2203 if (uses_atomic) 2204 return NULL; 2205 2206 return encoder->crtc; 2207 } 2208 2209 /** 2210 * drm_mode_getencoder - get encoder configuration 2211 * @dev: drm device for the ioctl 2212 * @data: data pointer for the ioctl 2213 * @file_priv: drm file for the ioctl call 2214 * 2215 * Construct a encoder configuration structure to return to the user. 2216 * 2217 * Called by the user via ioctl. 2218 * 2219 * Returns: 2220 * Zero on success, negative errno on failure. 2221 */ 2222 int drm_mode_getencoder(struct drm_device *dev, void *data, 2223 struct drm_file *file_priv) 2224 { 2225 struct drm_mode_get_encoder *enc_resp = data; 2226 struct drm_encoder *encoder; 2227 struct drm_crtc *crtc; 2228 2229 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2230 return -EINVAL; 2231 2232 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2233 if (!encoder) 2234 return -ENOENT; 2235 2236 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2237 crtc = drm_encoder_get_crtc(encoder); 2238 if (crtc) 2239 enc_resp->crtc_id = crtc->base.id; 2240 else 2241 enc_resp->crtc_id = 0; 2242 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2243 2244 enc_resp->encoder_type = encoder->encoder_type; 2245 enc_resp->encoder_id = encoder->base.id; 2246 enc_resp->possible_crtcs = encoder->possible_crtcs; 2247 enc_resp->possible_clones = encoder->possible_clones; 2248 2249 return 0; 2250 } 2251 2252 /** 2253 * drm_mode_getplane_res - enumerate all plane resources 2254 * @dev: DRM device 2255 * @data: ioctl data 2256 * @file_priv: DRM file info 2257 * 2258 * Construct a list of plane ids to return to the user. 2259 * 2260 * Called by the user via ioctl. 2261 * 2262 * Returns: 2263 * Zero on success, negative errno on failure. 2264 */ 2265 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2266 struct drm_file *file_priv) 2267 { 2268 struct drm_mode_get_plane_res *plane_resp = data; 2269 struct drm_mode_config *config; 2270 struct drm_plane *plane; 2271 uint32_t __user *plane_ptr; 2272 int copied = 0; 2273 unsigned num_planes; 2274 2275 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2276 return -EINVAL; 2277 2278 config = &dev->mode_config; 2279 2280 if (file_priv->universal_planes) 2281 num_planes = config->num_total_plane; 2282 else 2283 num_planes = config->num_overlay_plane; 2284 2285 /* 2286 * This ioctl is called twice, once to determine how much space is 2287 * needed, and the 2nd time to fill it. 2288 */ 2289 if (num_planes && 2290 (plane_resp->count_planes >= num_planes)) { 2291 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2292 2293 /* Plane lists are invariant, no locking needed. */ 2294 list_for_each_entry(plane, &config->plane_list, head) { 2295 /* 2296 * Unless userspace set the 'universal planes' 2297 * capability bit, only advertise overlays. 2298 */ 2299 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2300 !file_priv->universal_planes) 2301 continue; 2302 2303 if (put_user(plane->base.id, plane_ptr + copied)) 2304 return -EFAULT; 2305 copied++; 2306 } 2307 } 2308 plane_resp->count_planes = num_planes; 2309 2310 return 0; 2311 } 2312 2313 /** 2314 * drm_mode_getplane - get plane configuration 2315 * @dev: DRM device 2316 * @data: ioctl data 2317 * @file_priv: DRM file info 2318 * 2319 * Construct a plane configuration structure to return to the user. 2320 * 2321 * Called by the user via ioctl. 2322 * 2323 * Returns: 2324 * Zero on success, negative errno on failure. 2325 */ 2326 int drm_mode_getplane(struct drm_device *dev, void *data, 2327 struct drm_file *file_priv) 2328 { 2329 struct drm_mode_get_plane *plane_resp = data; 2330 struct drm_plane *plane; 2331 uint32_t __user *format_ptr; 2332 2333 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2334 return -EINVAL; 2335 2336 plane = drm_plane_find(dev, plane_resp->plane_id); 2337 if (!plane) 2338 return -ENOENT; 2339 2340 drm_modeset_lock(&plane->mutex, NULL); 2341 if (plane->crtc) 2342 plane_resp->crtc_id = plane->crtc->base.id; 2343 else 2344 plane_resp->crtc_id = 0; 2345 2346 if (plane->fb) 2347 plane_resp->fb_id = plane->fb->base.id; 2348 else 2349 plane_resp->fb_id = 0; 2350 drm_modeset_unlock(&plane->mutex); 2351 2352 plane_resp->plane_id = plane->base.id; 2353 plane_resp->possible_crtcs = plane->possible_crtcs; 2354 plane_resp->gamma_size = 0; 2355 2356 /* 2357 * This ioctl is called twice, once to determine how much space is 2358 * needed, and the 2nd time to fill it. 2359 */ 2360 if (plane->format_count && 2361 (plane_resp->count_format_types >= plane->format_count)) { 2362 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2363 if (copy_to_user(format_ptr, 2364 plane->format_types, 2365 sizeof(uint32_t) * plane->format_count)) { 2366 return -EFAULT; 2367 } 2368 } 2369 plane_resp->count_format_types = plane->format_count; 2370 2371 return 0; 2372 } 2373 2374 /** 2375 * drm_plane_check_pixel_format - Check if the plane supports the pixel format 2376 * @plane: plane to check for format support 2377 * @format: the pixel format 2378 * 2379 * Returns: 2380 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL 2381 * otherwise. 2382 */ 2383 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format) 2384 { 2385 unsigned int i; 2386 2387 for (i = 0; i < plane->format_count; i++) { 2388 if (format == plane->format_types[i]) 2389 return 0; 2390 } 2391 2392 return -EINVAL; 2393 } 2394 2395 /* 2396 * setplane_internal - setplane handler for internal callers 2397 * 2398 * Note that we assume an extra reference has already been taken on fb. If the 2399 * update fails, this reference will be dropped before return; if it succeeds, 2400 * the previous framebuffer (if any) will be unreferenced instead. 2401 * 2402 * src_{x,y,w,h} are provided in 16.16 fixed point format 2403 */ 2404 static int __setplane_internal(struct drm_plane *plane, 2405 struct drm_crtc *crtc, 2406 struct drm_framebuffer *fb, 2407 int32_t crtc_x, int32_t crtc_y, 2408 uint32_t crtc_w, uint32_t crtc_h, 2409 /* src_{x,y,w,h} values are 16.16 fixed point */ 2410 uint32_t src_x, uint32_t src_y, 2411 uint32_t src_w, uint32_t src_h) 2412 { 2413 int ret = 0; 2414 unsigned int fb_width, fb_height; 2415 2416 /* No fb means shut it down */ 2417 if (!fb) { 2418 plane->old_fb = plane->fb; 2419 ret = plane->funcs->disable_plane(plane); 2420 if (!ret) { 2421 plane->crtc = NULL; 2422 plane->fb = NULL; 2423 } else { 2424 plane->old_fb = NULL; 2425 } 2426 goto out; 2427 } 2428 2429 /* Check whether this plane is usable on this CRTC */ 2430 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2431 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2432 ret = -EINVAL; 2433 goto out; 2434 } 2435 2436 /* Check whether this plane supports the fb pixel format. */ 2437 ret = drm_plane_check_pixel_format(plane, fb->pixel_format); 2438 if (ret) { 2439 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2440 drm_get_format_name(fb->pixel_format)); 2441 goto out; 2442 } 2443 2444 /* Give drivers some help against integer overflows */ 2445 if (crtc_w > INT_MAX || 2446 crtc_x > INT_MAX - (int32_t) crtc_w || 2447 crtc_h > INT_MAX || 2448 crtc_y > INT_MAX - (int32_t) crtc_h) { 2449 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2450 crtc_w, crtc_h, crtc_x, crtc_y); 2451 return -ERANGE; 2452 } 2453 2454 2455 fb_width = fb->width << 16; 2456 fb_height = fb->height << 16; 2457 2458 /* Make sure source coordinates are inside the fb. */ 2459 if (src_w > fb_width || 2460 src_x > fb_width - src_w || 2461 src_h > fb_height || 2462 src_y > fb_height - src_h) { 2463 DRM_DEBUG_KMS("Invalid source coordinates " 2464 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2465 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2466 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2467 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2468 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2469 ret = -ENOSPC; 2470 goto out; 2471 } 2472 2473 plane->old_fb = plane->fb; 2474 ret = plane->funcs->update_plane(plane, crtc, fb, 2475 crtc_x, crtc_y, crtc_w, crtc_h, 2476 src_x, src_y, src_w, src_h); 2477 if (!ret) { 2478 plane->crtc = crtc; 2479 plane->fb = fb; 2480 fb = NULL; 2481 } else { 2482 plane->old_fb = NULL; 2483 } 2484 2485 out: 2486 if (fb) 2487 drm_framebuffer_unreference(fb); 2488 if (plane->old_fb) 2489 drm_framebuffer_unreference(plane->old_fb); 2490 plane->old_fb = NULL; 2491 2492 return ret; 2493 } 2494 2495 static int setplane_internal(struct drm_plane *plane, 2496 struct drm_crtc *crtc, 2497 struct drm_framebuffer *fb, 2498 int32_t crtc_x, int32_t crtc_y, 2499 uint32_t crtc_w, uint32_t crtc_h, 2500 /* src_{x,y,w,h} values are 16.16 fixed point */ 2501 uint32_t src_x, uint32_t src_y, 2502 uint32_t src_w, uint32_t src_h) 2503 { 2504 int ret; 2505 2506 drm_modeset_lock_all(plane->dev); 2507 ret = __setplane_internal(plane, crtc, fb, 2508 crtc_x, crtc_y, crtc_w, crtc_h, 2509 src_x, src_y, src_w, src_h); 2510 drm_modeset_unlock_all(plane->dev); 2511 2512 return ret; 2513 } 2514 2515 /** 2516 * drm_mode_setplane - configure a plane's configuration 2517 * @dev: DRM device 2518 * @data: ioctl data* 2519 * @file_priv: DRM file info 2520 * 2521 * Set plane configuration, including placement, fb, scaling, and other factors. 2522 * Or pass a NULL fb to disable (planes may be disabled without providing a 2523 * valid crtc). 2524 * 2525 * Returns: 2526 * Zero on success, negative errno on failure. 2527 */ 2528 int drm_mode_setplane(struct drm_device *dev, void *data, 2529 struct drm_file *file_priv) 2530 { 2531 struct drm_mode_set_plane *plane_req = data; 2532 struct drm_plane *plane; 2533 struct drm_crtc *crtc = NULL; 2534 struct drm_framebuffer *fb = NULL; 2535 2536 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2537 return -EINVAL; 2538 2539 /* 2540 * First, find the plane, crtc, and fb objects. If not available, 2541 * we don't bother to call the driver. 2542 */ 2543 plane = drm_plane_find(dev, plane_req->plane_id); 2544 if (!plane) { 2545 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2546 plane_req->plane_id); 2547 return -ENOENT; 2548 } 2549 2550 if (plane_req->fb_id) { 2551 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2552 if (!fb) { 2553 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2554 plane_req->fb_id); 2555 return -ENOENT; 2556 } 2557 2558 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2559 if (!crtc) { 2560 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2561 plane_req->crtc_id); 2562 return -ENOENT; 2563 } 2564 } 2565 2566 /* 2567 * setplane_internal will take care of deref'ing either the old or new 2568 * framebuffer depending on success. 2569 */ 2570 return setplane_internal(plane, crtc, fb, 2571 plane_req->crtc_x, plane_req->crtc_y, 2572 plane_req->crtc_w, plane_req->crtc_h, 2573 plane_req->src_x, plane_req->src_y, 2574 plane_req->src_w, plane_req->src_h); 2575 } 2576 2577 /** 2578 * drm_mode_set_config_internal - helper to call ->set_config 2579 * @set: modeset config to set 2580 * 2581 * This is a little helper to wrap internal calls to the ->set_config driver 2582 * interface. The only thing it adds is correct refcounting dance. 2583 * 2584 * Returns: 2585 * Zero on success, negative errno on failure. 2586 */ 2587 int drm_mode_set_config_internal(struct drm_mode_set *set) 2588 { 2589 struct drm_crtc *crtc = set->crtc; 2590 struct drm_framebuffer *fb; 2591 struct drm_crtc *tmp; 2592 int ret; 2593 2594 /* 2595 * NOTE: ->set_config can also disable other crtcs (if we steal all 2596 * connectors from it), hence we need to refcount the fbs across all 2597 * crtcs. Atomic modeset will have saner semantics ... 2598 */ 2599 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) 2600 tmp->primary->old_fb = tmp->primary->fb; 2601 2602 fb = set->fb; 2603 2604 ret = crtc->funcs->set_config(set); 2605 if (ret == 0) { 2606 crtc->primary->crtc = crtc; 2607 crtc->primary->fb = fb; 2608 } 2609 2610 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { 2611 if (tmp->primary->fb) 2612 drm_framebuffer_reference(tmp->primary->fb); 2613 if (tmp->primary->old_fb) 2614 drm_framebuffer_unreference(tmp->primary->old_fb); 2615 tmp->primary->old_fb = NULL; 2616 } 2617 2618 return ret; 2619 } 2620 EXPORT_SYMBOL(drm_mode_set_config_internal); 2621 2622 /** 2623 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode 2624 * @mode: mode to query 2625 * @hdisplay: hdisplay value to fill in 2626 * @vdisplay: vdisplay value to fill in 2627 * 2628 * The vdisplay value will be doubled if the specified mode is a stereo mode of 2629 * the appropriate layout. 2630 */ 2631 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, 2632 int *hdisplay, int *vdisplay) 2633 { 2634 struct drm_display_mode adjusted; 2635 2636 drm_mode_copy(&adjusted, mode); 2637 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 2638 *hdisplay = adjusted.crtc_hdisplay; 2639 *vdisplay = adjusted.crtc_vdisplay; 2640 } 2641 EXPORT_SYMBOL(drm_crtc_get_hv_timing); 2642 2643 /** 2644 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2645 * CRTC viewport 2646 * @crtc: CRTC that framebuffer will be displayed on 2647 * @x: x panning 2648 * @y: y panning 2649 * @mode: mode that framebuffer will be displayed under 2650 * @fb: framebuffer to check size of 2651 */ 2652 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2653 int x, int y, 2654 const struct drm_display_mode *mode, 2655 const struct drm_framebuffer *fb) 2656 2657 { 2658 int hdisplay, vdisplay; 2659 2660 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); 2661 2662 if (crtc->invert_dimensions) 2663 swap(hdisplay, vdisplay); 2664 2665 if (hdisplay > fb->width || 2666 vdisplay > fb->height || 2667 x > fb->width - hdisplay || 2668 y > fb->height - vdisplay) { 2669 DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n", 2670 fb->width, fb->height, hdisplay, vdisplay, x, y, 2671 crtc->invert_dimensions ? " (inverted)" : ""); 2672 return -ENOSPC; 2673 } 2674 2675 return 0; 2676 } 2677 EXPORT_SYMBOL(drm_crtc_check_viewport); 2678 2679 /** 2680 * drm_mode_setcrtc - set CRTC configuration 2681 * @dev: drm device for the ioctl 2682 * @data: data pointer for the ioctl 2683 * @file_priv: drm file for the ioctl call 2684 * 2685 * Build a new CRTC configuration based on user request. 2686 * 2687 * Called by the user via ioctl. 2688 * 2689 * Returns: 2690 * Zero on success, negative errno on failure. 2691 */ 2692 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2693 struct drm_file *file_priv) 2694 { 2695 struct drm_mode_config *config = &dev->mode_config; 2696 struct drm_mode_crtc *crtc_req = data; 2697 struct drm_crtc *crtc; 2698 struct drm_connector **connector_set = NULL, *connector; 2699 struct drm_framebuffer *fb = NULL; 2700 struct drm_display_mode *mode = NULL; 2701 struct drm_mode_set set; 2702 uint32_t __user *set_connectors_ptr; 2703 int ret; 2704 int i; 2705 2706 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2707 return -EINVAL; 2708 2709 /* 2710 * Universal plane src offsets are only 16.16, prevent havoc for 2711 * drivers using universal plane code internally. 2712 */ 2713 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) 2714 return -ERANGE; 2715 2716 drm_modeset_lock_all(dev); 2717 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2718 if (!crtc) { 2719 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2720 ret = -ENOENT; 2721 goto out; 2722 } 2723 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 2724 2725 if (crtc_req->mode_valid) { 2726 /* If we have a mode we need a framebuffer. */ 2727 /* If we pass -1, set the mode with the currently bound fb */ 2728 if (crtc_req->fb_id == -1) { 2729 if (!crtc->primary->fb) { 2730 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2731 ret = -EINVAL; 2732 goto out; 2733 } 2734 fb = crtc->primary->fb; 2735 /* Make refcounting symmetric with the lookup path. */ 2736 drm_framebuffer_reference(fb); 2737 } else { 2738 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2739 if (!fb) { 2740 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2741 crtc_req->fb_id); 2742 ret = -ENOENT; 2743 goto out; 2744 } 2745 } 2746 2747 mode = drm_mode_create(dev); 2748 if (!mode) { 2749 ret = -ENOMEM; 2750 goto out; 2751 } 2752 2753 ret = drm_mode_convert_umode(mode, &crtc_req->mode); 2754 if (ret) { 2755 DRM_DEBUG_KMS("Invalid mode\n"); 2756 goto out; 2757 } 2758 2759 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 2760 2761 /* 2762 * Check whether the primary plane supports the fb pixel format. 2763 * Drivers not implementing the universal planes API use a 2764 * default formats list provided by the DRM core which doesn't 2765 * match real hardware capabilities. Skip the check in that 2766 * case. 2767 */ 2768 if (!crtc->primary->format_default) { 2769 ret = drm_plane_check_pixel_format(crtc->primary, 2770 fb->pixel_format); 2771 if (ret) { 2772 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2773 drm_get_format_name(fb->pixel_format)); 2774 goto out; 2775 } 2776 } 2777 2778 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2779 mode, fb); 2780 if (ret) 2781 goto out; 2782 2783 } 2784 2785 if (crtc_req->count_connectors == 0 && mode) { 2786 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2787 ret = -EINVAL; 2788 goto out; 2789 } 2790 2791 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2792 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2793 crtc_req->count_connectors); 2794 ret = -EINVAL; 2795 goto out; 2796 } 2797 2798 if (crtc_req->count_connectors > 0) { 2799 u32 out_id; 2800 2801 /* Avoid unbounded kernel memory allocation */ 2802 if (crtc_req->count_connectors > config->num_connector) { 2803 ret = -EINVAL; 2804 goto out; 2805 } 2806 2807 connector_set = kmalloc_array(crtc_req->count_connectors, 2808 sizeof(struct drm_connector *), 2809 GFP_KERNEL); 2810 if (!connector_set) { 2811 ret = -ENOMEM; 2812 goto out; 2813 } 2814 2815 for (i = 0; i < crtc_req->count_connectors; i++) { 2816 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2817 if (get_user(out_id, &set_connectors_ptr[i])) { 2818 ret = -EFAULT; 2819 goto out; 2820 } 2821 2822 connector = drm_connector_find(dev, out_id); 2823 if (!connector) { 2824 DRM_DEBUG_KMS("Connector id %d unknown\n", 2825 out_id); 2826 ret = -ENOENT; 2827 goto out; 2828 } 2829 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2830 connector->base.id, 2831 connector->name); 2832 2833 connector_set[i] = connector; 2834 } 2835 } 2836 2837 set.crtc = crtc; 2838 set.x = crtc_req->x; 2839 set.y = crtc_req->y; 2840 set.mode = mode; 2841 set.connectors = connector_set; 2842 set.num_connectors = crtc_req->count_connectors; 2843 set.fb = fb; 2844 ret = drm_mode_set_config_internal(&set); 2845 2846 out: 2847 if (fb) 2848 drm_framebuffer_unreference(fb); 2849 2850 kfree(connector_set); 2851 drm_mode_destroy(dev, mode); 2852 drm_modeset_unlock_all(dev); 2853 return ret; 2854 } 2855 2856 /** 2857 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2858 * universal plane handler call 2859 * @crtc: crtc to update cursor for 2860 * @req: data pointer for the ioctl 2861 * @file_priv: drm file for the ioctl call 2862 * 2863 * Legacy cursor ioctl's work directly with driver buffer handles. To 2864 * translate legacy ioctl calls into universal plane handler calls, we need to 2865 * wrap the native buffer handle in a drm_framebuffer. 2866 * 2867 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2868 * buffer with a pitch of 4*width; the universal plane interface should be used 2869 * directly in cases where the hardware can support other buffer settings and 2870 * userspace wants to make use of these capabilities. 2871 * 2872 * Returns: 2873 * Zero on success, negative errno on failure. 2874 */ 2875 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2876 struct drm_mode_cursor2 *req, 2877 struct drm_file *file_priv) 2878 { 2879 struct drm_device *dev = crtc->dev; 2880 struct drm_framebuffer *fb = NULL; 2881 struct drm_mode_fb_cmd2 fbreq = { 2882 .width = req->width, 2883 .height = req->height, 2884 .pixel_format = DRM_FORMAT_ARGB8888, 2885 .pitches = { req->width * 4 }, 2886 .handles = { req->handle }, 2887 }; 2888 int32_t crtc_x, crtc_y; 2889 uint32_t crtc_w = 0, crtc_h = 0; 2890 uint32_t src_w = 0, src_h = 0; 2891 int ret = 0; 2892 2893 BUG_ON(!crtc->cursor); 2894 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2895 2896 /* 2897 * Obtain fb we'll be using (either new or existing) and take an extra 2898 * reference to it if fb != null. setplane will take care of dropping 2899 * the reference if the plane update fails. 2900 */ 2901 if (req->flags & DRM_MODE_CURSOR_BO) { 2902 if (req->handle) { 2903 fb = internal_framebuffer_create(dev, &fbreq, file_priv); 2904 if (IS_ERR(fb)) { 2905 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2906 return PTR_ERR(fb); 2907 } 2908 } else { 2909 fb = NULL; 2910 } 2911 } else { 2912 fb = crtc->cursor->fb; 2913 if (fb) 2914 drm_framebuffer_reference(fb); 2915 } 2916 2917 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2918 crtc_x = req->x; 2919 crtc_y = req->y; 2920 } else { 2921 crtc_x = crtc->cursor_x; 2922 crtc_y = crtc->cursor_y; 2923 } 2924 2925 if (fb) { 2926 crtc_w = fb->width; 2927 crtc_h = fb->height; 2928 src_w = fb->width << 16; 2929 src_h = fb->height << 16; 2930 } 2931 2932 /* 2933 * setplane_internal will take care of deref'ing either the old or new 2934 * framebuffer depending on success. 2935 */ 2936 ret = __setplane_internal(crtc->cursor, crtc, fb, 2937 crtc_x, crtc_y, crtc_w, crtc_h, 2938 0, 0, src_w, src_h); 2939 2940 /* Update successful; save new cursor position, if necessary */ 2941 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2942 crtc->cursor_x = req->x; 2943 crtc->cursor_y = req->y; 2944 } 2945 2946 return ret; 2947 } 2948 2949 static int drm_mode_cursor_common(struct drm_device *dev, 2950 struct drm_mode_cursor2 *req, 2951 struct drm_file *file_priv) 2952 { 2953 struct drm_crtc *crtc; 2954 int ret = 0; 2955 2956 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2957 return -EINVAL; 2958 2959 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 2960 return -EINVAL; 2961 2962 crtc = drm_crtc_find(dev, req->crtc_id); 2963 if (!crtc) { 2964 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 2965 return -ENOENT; 2966 } 2967 2968 /* 2969 * If this crtc has a universal cursor plane, call that plane's update 2970 * handler rather than using legacy cursor handlers. 2971 */ 2972 drm_modeset_lock_crtc(crtc, crtc->cursor); 2973 if (crtc->cursor) { 2974 ret = drm_mode_cursor_universal(crtc, req, file_priv); 2975 goto out; 2976 } 2977 2978 if (req->flags & DRM_MODE_CURSOR_BO) { 2979 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 2980 ret = -ENXIO; 2981 goto out; 2982 } 2983 /* Turns off the cursor if handle is 0 */ 2984 if (crtc->funcs->cursor_set2) 2985 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 2986 req->width, req->height, req->hot_x, req->hot_y); 2987 else 2988 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 2989 req->width, req->height); 2990 } 2991 2992 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2993 if (crtc->funcs->cursor_move) { 2994 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 2995 } else { 2996 ret = -EFAULT; 2997 goto out; 2998 } 2999 } 3000 out: 3001 drm_modeset_unlock_crtc(crtc); 3002 3003 return ret; 3004 3005 } 3006 3007 3008 /** 3009 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 3010 * @dev: drm device for the ioctl 3011 * @data: data pointer for the ioctl 3012 * @file_priv: drm file for the ioctl call 3013 * 3014 * Set the cursor configuration based on user request. 3015 * 3016 * Called by the user via ioctl. 3017 * 3018 * Returns: 3019 * Zero on success, negative errno on failure. 3020 */ 3021 int drm_mode_cursor_ioctl(struct drm_device *dev, 3022 void *data, struct drm_file *file_priv) 3023 { 3024 struct drm_mode_cursor *req = data; 3025 struct drm_mode_cursor2 new_req; 3026 3027 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 3028 new_req.hot_x = new_req.hot_y = 0; 3029 3030 return drm_mode_cursor_common(dev, &new_req, file_priv); 3031 } 3032 3033 /** 3034 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 3035 * @dev: drm device for the ioctl 3036 * @data: data pointer for the ioctl 3037 * @file_priv: drm file for the ioctl call 3038 * 3039 * Set the cursor configuration based on user request. This implements the 2nd 3040 * version of the cursor ioctl, which allows userspace to additionally specify 3041 * the hotspot of the pointer. 3042 * 3043 * Called by the user via ioctl. 3044 * 3045 * Returns: 3046 * Zero on success, negative errno on failure. 3047 */ 3048 int drm_mode_cursor2_ioctl(struct drm_device *dev, 3049 void *data, struct drm_file *file_priv) 3050 { 3051 struct drm_mode_cursor2 *req = data; 3052 3053 return drm_mode_cursor_common(dev, req, file_priv); 3054 } 3055 3056 /** 3057 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 3058 * @bpp: bits per pixels 3059 * @depth: bit depth per pixel 3060 * 3061 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 3062 * Useful in fbdev emulation code, since that deals in those values. 3063 */ 3064 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 3065 { 3066 uint32_t fmt; 3067 3068 switch (bpp) { 3069 case 8: 3070 fmt = DRM_FORMAT_C8; 3071 break; 3072 case 16: 3073 if (depth == 15) 3074 fmt = DRM_FORMAT_XRGB1555; 3075 else 3076 fmt = DRM_FORMAT_RGB565; 3077 break; 3078 case 24: 3079 fmt = DRM_FORMAT_RGB888; 3080 break; 3081 case 32: 3082 if (depth == 24) 3083 fmt = DRM_FORMAT_XRGB8888; 3084 else if (depth == 30) 3085 fmt = DRM_FORMAT_XRGB2101010; 3086 else 3087 fmt = DRM_FORMAT_ARGB8888; 3088 break; 3089 default: 3090 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3091 fmt = DRM_FORMAT_XRGB8888; 3092 break; 3093 } 3094 3095 return fmt; 3096 } 3097 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3098 3099 /** 3100 * drm_mode_addfb - add an FB to the graphics configuration 3101 * @dev: drm device for the ioctl 3102 * @data: data pointer for the ioctl 3103 * @file_priv: drm file for the ioctl call 3104 * 3105 * Add a new FB to the specified CRTC, given a user request. This is the 3106 * original addfb ioctl which only supported RGB formats. 3107 * 3108 * Called by the user via ioctl. 3109 * 3110 * Returns: 3111 * Zero on success, negative errno on failure. 3112 */ 3113 int drm_mode_addfb(struct drm_device *dev, 3114 void *data, struct drm_file *file_priv) 3115 { 3116 struct drm_mode_fb_cmd *or = data; 3117 struct drm_mode_fb_cmd2 r = {}; 3118 int ret; 3119 3120 /* convert to new format and call new ioctl */ 3121 r.fb_id = or->fb_id; 3122 r.width = or->width; 3123 r.height = or->height; 3124 r.pitches[0] = or->pitch; 3125 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3126 r.handles[0] = or->handle; 3127 3128 ret = drm_mode_addfb2(dev, &r, file_priv); 3129 if (ret) 3130 return ret; 3131 3132 or->fb_id = r.fb_id; 3133 3134 return 0; 3135 } 3136 3137 static int format_check(const struct drm_mode_fb_cmd2 *r) 3138 { 3139 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3140 3141 switch (format) { 3142 case DRM_FORMAT_C8: 3143 case DRM_FORMAT_RGB332: 3144 case DRM_FORMAT_BGR233: 3145 case DRM_FORMAT_XRGB4444: 3146 case DRM_FORMAT_XBGR4444: 3147 case DRM_FORMAT_RGBX4444: 3148 case DRM_FORMAT_BGRX4444: 3149 case DRM_FORMAT_ARGB4444: 3150 case DRM_FORMAT_ABGR4444: 3151 case DRM_FORMAT_RGBA4444: 3152 case DRM_FORMAT_BGRA4444: 3153 case DRM_FORMAT_XRGB1555: 3154 case DRM_FORMAT_XBGR1555: 3155 case DRM_FORMAT_RGBX5551: 3156 case DRM_FORMAT_BGRX5551: 3157 case DRM_FORMAT_ARGB1555: 3158 case DRM_FORMAT_ABGR1555: 3159 case DRM_FORMAT_RGBA5551: 3160 case DRM_FORMAT_BGRA5551: 3161 case DRM_FORMAT_RGB565: 3162 case DRM_FORMAT_BGR565: 3163 case DRM_FORMAT_RGB888: 3164 case DRM_FORMAT_BGR888: 3165 case DRM_FORMAT_XRGB8888: 3166 case DRM_FORMAT_XBGR8888: 3167 case DRM_FORMAT_RGBX8888: 3168 case DRM_FORMAT_BGRX8888: 3169 case DRM_FORMAT_ARGB8888: 3170 case DRM_FORMAT_ABGR8888: 3171 case DRM_FORMAT_RGBA8888: 3172 case DRM_FORMAT_BGRA8888: 3173 case DRM_FORMAT_XRGB2101010: 3174 case DRM_FORMAT_XBGR2101010: 3175 case DRM_FORMAT_RGBX1010102: 3176 case DRM_FORMAT_BGRX1010102: 3177 case DRM_FORMAT_ARGB2101010: 3178 case DRM_FORMAT_ABGR2101010: 3179 case DRM_FORMAT_RGBA1010102: 3180 case DRM_FORMAT_BGRA1010102: 3181 case DRM_FORMAT_YUYV: 3182 case DRM_FORMAT_YVYU: 3183 case DRM_FORMAT_UYVY: 3184 case DRM_FORMAT_VYUY: 3185 case DRM_FORMAT_AYUV: 3186 case DRM_FORMAT_NV12: 3187 case DRM_FORMAT_NV21: 3188 case DRM_FORMAT_NV16: 3189 case DRM_FORMAT_NV61: 3190 case DRM_FORMAT_NV24: 3191 case DRM_FORMAT_NV42: 3192 case DRM_FORMAT_YUV410: 3193 case DRM_FORMAT_YVU410: 3194 case DRM_FORMAT_YUV411: 3195 case DRM_FORMAT_YVU411: 3196 case DRM_FORMAT_YUV420: 3197 case DRM_FORMAT_YVU420: 3198 case DRM_FORMAT_YUV422: 3199 case DRM_FORMAT_YVU422: 3200 case DRM_FORMAT_YUV444: 3201 case DRM_FORMAT_YVU444: 3202 return 0; 3203 default: 3204 DRM_DEBUG_KMS("invalid pixel format %s\n", 3205 drm_get_format_name(r->pixel_format)); 3206 return -EINVAL; 3207 } 3208 } 3209 3210 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3211 { 3212 int ret, hsub, vsub, num_planes, i; 3213 3214 ret = format_check(r); 3215 if (ret) { 3216 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3217 drm_get_format_name(r->pixel_format)); 3218 return ret; 3219 } 3220 3221 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3222 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3223 num_planes = drm_format_num_planes(r->pixel_format); 3224 3225 if (r->width == 0 || r->width % hsub) { 3226 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3227 return -EINVAL; 3228 } 3229 3230 if (r->height == 0 || r->height % vsub) { 3231 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3232 return -EINVAL; 3233 } 3234 3235 for (i = 0; i < num_planes; i++) { 3236 unsigned int width = r->width / (i != 0 ? hsub : 1); 3237 unsigned int height = r->height / (i != 0 ? vsub : 1); 3238 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3239 3240 if (!r->handles[i]) { 3241 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3242 return -EINVAL; 3243 } 3244 3245 if ((uint64_t) width * cpp > UINT_MAX) 3246 return -ERANGE; 3247 3248 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3249 return -ERANGE; 3250 3251 if (r->pitches[i] < width * cpp) { 3252 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3253 return -EINVAL; 3254 } 3255 3256 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { 3257 DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n", 3258 r->modifier[i], i); 3259 return -EINVAL; 3260 } 3261 3262 /* modifier specific checks: */ 3263 switch (r->modifier[i]) { 3264 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: 3265 /* NOTE: the pitch restriction may be lifted later if it turns 3266 * out that no hw has this restriction: 3267 */ 3268 if (r->pixel_format != DRM_FORMAT_NV12 || 3269 width % 128 || height % 32 || 3270 r->pitches[i] % 128) { 3271 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i); 3272 return -EINVAL; 3273 } 3274 break; 3275 3276 default: 3277 break; 3278 } 3279 } 3280 3281 for (i = num_planes; i < 4; i++) { 3282 if (r->modifier[i]) { 3283 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i); 3284 return -EINVAL; 3285 } 3286 3287 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ 3288 if (!(r->flags & DRM_MODE_FB_MODIFIERS)) 3289 continue; 3290 3291 if (r->handles[i]) { 3292 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i); 3293 return -EINVAL; 3294 } 3295 3296 if (r->pitches[i]) { 3297 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i); 3298 return -EINVAL; 3299 } 3300 3301 if (r->offsets[i]) { 3302 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i); 3303 return -EINVAL; 3304 } 3305 } 3306 3307 return 0; 3308 } 3309 3310 static struct drm_framebuffer * 3311 internal_framebuffer_create(struct drm_device *dev, 3312 struct drm_mode_fb_cmd2 *r, 3313 struct drm_file *file_priv) 3314 { 3315 struct drm_mode_config *config = &dev->mode_config; 3316 struct drm_framebuffer *fb; 3317 int ret; 3318 3319 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { 3320 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3321 return ERR_PTR(-EINVAL); 3322 } 3323 3324 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3325 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3326 r->width, config->min_width, config->max_width); 3327 return ERR_PTR(-EINVAL); 3328 } 3329 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3330 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3331 r->height, config->min_height, config->max_height); 3332 return ERR_PTR(-EINVAL); 3333 } 3334 3335 if (r->flags & DRM_MODE_FB_MODIFIERS && 3336 !dev->mode_config.allow_fb_modifiers) { 3337 DRM_DEBUG_KMS("driver does not support fb modifiers\n"); 3338 return ERR_PTR(-EINVAL); 3339 } 3340 3341 ret = framebuffer_check(r); 3342 if (ret) 3343 return ERR_PTR(ret); 3344 3345 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3346 if (IS_ERR(fb)) { 3347 DRM_DEBUG_KMS("could not create framebuffer\n"); 3348 return fb; 3349 } 3350 3351 return fb; 3352 } 3353 3354 /** 3355 * drm_mode_addfb2 - add an FB to the graphics configuration 3356 * @dev: drm device for the ioctl 3357 * @data: data pointer for the ioctl 3358 * @file_priv: drm file for the ioctl call 3359 * 3360 * Add a new FB to the specified CRTC, given a user request with format. This is 3361 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3362 * and uses fourcc codes as pixel format specifiers. 3363 * 3364 * Called by the user via ioctl. 3365 * 3366 * Returns: 3367 * Zero on success, negative errno on failure. 3368 */ 3369 int drm_mode_addfb2(struct drm_device *dev, 3370 void *data, struct drm_file *file_priv) 3371 { 3372 struct drm_mode_fb_cmd2 *r = data; 3373 struct drm_framebuffer *fb; 3374 3375 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3376 return -EINVAL; 3377 3378 fb = internal_framebuffer_create(dev, r, file_priv); 3379 if (IS_ERR(fb)) 3380 return PTR_ERR(fb); 3381 3382 /* Transfer ownership to the filp for reaping on close */ 3383 3384 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3385 mutex_lock(&file_priv->fbs_lock); 3386 r->fb_id = fb->base.id; 3387 list_add(&fb->filp_head, &file_priv->fbs); 3388 mutex_unlock(&file_priv->fbs_lock); 3389 3390 return 0; 3391 } 3392 3393 /** 3394 * drm_mode_rmfb - remove an FB from the configuration 3395 * @dev: drm device for the ioctl 3396 * @data: data pointer for the ioctl 3397 * @file_priv: drm file for the ioctl call 3398 * 3399 * Remove the FB specified by the user. 3400 * 3401 * Called by the user via ioctl. 3402 * 3403 * Returns: 3404 * Zero on success, negative errno on failure. 3405 */ 3406 int drm_mode_rmfb(struct drm_device *dev, 3407 void *data, struct drm_file *file_priv) 3408 { 3409 struct drm_framebuffer *fb = NULL; 3410 struct drm_framebuffer *fbl = NULL; 3411 uint32_t *id = data; 3412 int found = 0; 3413 3414 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3415 return -EINVAL; 3416 3417 mutex_lock(&file_priv->fbs_lock); 3418 mutex_lock(&dev->mode_config.fb_lock); 3419 fb = __drm_framebuffer_lookup(dev, *id); 3420 if (!fb) 3421 goto fail_lookup; 3422 3423 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3424 if (fb == fbl) 3425 found = 1; 3426 if (!found) 3427 goto fail_lookup; 3428 3429 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ 3430 __drm_framebuffer_unregister(dev, fb); 3431 3432 list_del_init(&fb->filp_head); 3433 mutex_unlock(&dev->mode_config.fb_lock); 3434 mutex_unlock(&file_priv->fbs_lock); 3435 3436 drm_framebuffer_remove(fb); 3437 3438 return 0; 3439 3440 fail_lookup: 3441 mutex_unlock(&dev->mode_config.fb_lock); 3442 mutex_unlock(&file_priv->fbs_lock); 3443 3444 return -ENOENT; 3445 } 3446 3447 /** 3448 * drm_mode_getfb - get FB info 3449 * @dev: drm device for the ioctl 3450 * @data: data pointer for the ioctl 3451 * @file_priv: drm file for the ioctl call 3452 * 3453 * Lookup the FB given its ID and return info about it. 3454 * 3455 * Called by the user via ioctl. 3456 * 3457 * Returns: 3458 * Zero on success, negative errno on failure. 3459 */ 3460 int drm_mode_getfb(struct drm_device *dev, 3461 void *data, struct drm_file *file_priv) 3462 { 3463 struct drm_mode_fb_cmd *r = data; 3464 struct drm_framebuffer *fb; 3465 int ret; 3466 3467 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3468 return -EINVAL; 3469 3470 fb = drm_framebuffer_lookup(dev, r->fb_id); 3471 if (!fb) 3472 return -ENOENT; 3473 3474 r->height = fb->height; 3475 r->width = fb->width; 3476 r->depth = fb->depth; 3477 r->bpp = fb->bits_per_pixel; 3478 r->pitch = fb->pitches[0]; 3479 if (fb->funcs->create_handle) { 3480 if (file_priv->is_master || capable(CAP_SYS_ADMIN) || 3481 drm_is_control_client(file_priv)) { 3482 ret = fb->funcs->create_handle(fb, file_priv, 3483 &r->handle); 3484 } else { 3485 /* GET_FB() is an unprivileged ioctl so we must not 3486 * return a buffer-handle to non-master processes! For 3487 * backwards-compatibility reasons, we cannot make 3488 * GET_FB() privileged, so just return an invalid handle 3489 * for non-masters. */ 3490 r->handle = 0; 3491 ret = 0; 3492 } 3493 } else { 3494 ret = -ENODEV; 3495 } 3496 3497 drm_framebuffer_unreference(fb); 3498 3499 return ret; 3500 } 3501 3502 /** 3503 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3504 * @dev: drm device for the ioctl 3505 * @data: data pointer for the ioctl 3506 * @file_priv: drm file for the ioctl call 3507 * 3508 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3509 * rectangle list. Generic userspace which does frontbuffer rendering must call 3510 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3511 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3512 * 3513 * Modesetting drivers which always update the frontbuffer do not need to 3514 * implement the corresponding ->dirty framebuffer callback. 3515 * 3516 * Called by the user via ioctl. 3517 * 3518 * Returns: 3519 * Zero on success, negative errno on failure. 3520 */ 3521 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3522 void *data, struct drm_file *file_priv) 3523 { 3524 struct drm_clip_rect __user *clips_ptr; 3525 struct drm_clip_rect *clips = NULL; 3526 struct drm_mode_fb_dirty_cmd *r = data; 3527 struct drm_framebuffer *fb; 3528 unsigned flags; 3529 int num_clips; 3530 int ret; 3531 3532 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3533 return -EINVAL; 3534 3535 fb = drm_framebuffer_lookup(dev, r->fb_id); 3536 if (!fb) 3537 return -ENOENT; 3538 3539 num_clips = r->num_clips; 3540 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3541 3542 if (!num_clips != !clips_ptr) { 3543 ret = -EINVAL; 3544 goto out_err1; 3545 } 3546 3547 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3548 3549 /* If userspace annotates copy, clips must come in pairs */ 3550 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3551 ret = -EINVAL; 3552 goto out_err1; 3553 } 3554 3555 if (num_clips && clips_ptr) { 3556 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3557 ret = -EINVAL; 3558 goto out_err1; 3559 } 3560 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); 3561 if (!clips) { 3562 ret = -ENOMEM; 3563 goto out_err1; 3564 } 3565 3566 ret = copy_from_user(clips, clips_ptr, 3567 num_clips * sizeof(*clips)); 3568 if (ret) { 3569 ret = -EFAULT; 3570 goto out_err2; 3571 } 3572 } 3573 3574 if (fb->funcs->dirty) { 3575 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3576 clips, num_clips); 3577 } else { 3578 ret = -ENOSYS; 3579 } 3580 3581 out_err2: 3582 kfree(clips); 3583 out_err1: 3584 drm_framebuffer_unreference(fb); 3585 3586 return ret; 3587 } 3588 3589 3590 /** 3591 * drm_fb_release - remove and free the FBs on this file 3592 * @priv: drm file for the ioctl 3593 * 3594 * Destroy all the FBs associated with @filp. 3595 * 3596 * Called by the user via ioctl. 3597 * 3598 * Returns: 3599 * Zero on success, negative errno on failure. 3600 */ 3601 void drm_fb_release(struct drm_file *priv) 3602 { 3603 struct drm_device *dev = priv->minor->dev; 3604 struct drm_framebuffer *fb, *tfb; 3605 3606 /* 3607 * When the file gets released that means no one else can access the fb 3608 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3609 * avoid upsetting lockdep since the universal cursor code adds a 3610 * framebuffer while holding mutex locks. 3611 * 3612 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3613 * locks is impossible here since no one else but this function can get 3614 * at it any more. 3615 */ 3616 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3617 3618 mutex_lock(&dev->mode_config.fb_lock); 3619 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ 3620 __drm_framebuffer_unregister(dev, fb); 3621 mutex_unlock(&dev->mode_config.fb_lock); 3622 3623 list_del_init(&fb->filp_head); 3624 3625 /* This will also drop the fpriv->fbs reference. */ 3626 drm_framebuffer_remove(fb); 3627 } 3628 } 3629 3630 /** 3631 * drm_property_create - create a new property type 3632 * @dev: drm device 3633 * @flags: flags specifying the property type 3634 * @name: name of the property 3635 * @num_values: number of pre-defined values 3636 * 3637 * This creates a new generic drm property which can then be attached to a drm 3638 * object with drm_object_attach_property. The returned property object must be 3639 * freed with drm_property_destroy. 3640 * 3641 * Note that the DRM core keeps a per-device list of properties and that, if 3642 * drm_mode_config_cleanup() is called, it will destroy all properties created 3643 * by the driver. 3644 * 3645 * Returns: 3646 * A pointer to the newly created property on success, NULL on failure. 3647 */ 3648 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3649 const char *name, int num_values) 3650 { 3651 struct drm_property *property = NULL; 3652 int ret; 3653 3654 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3655 if (!property) 3656 return NULL; 3657 3658 property->dev = dev; 3659 3660 if (num_values) { 3661 property->values = kcalloc(num_values, sizeof(uint64_t), 3662 GFP_KERNEL); 3663 if (!property->values) 3664 goto fail; 3665 } 3666 3667 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3668 if (ret) 3669 goto fail; 3670 3671 property->flags = flags; 3672 property->num_values = num_values; 3673 INIT_LIST_HEAD(&property->enum_list); 3674 3675 if (name) { 3676 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3677 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3678 } 3679 3680 list_add_tail(&property->head, &dev->mode_config.property_list); 3681 3682 WARN_ON(!drm_property_type_valid(property)); 3683 3684 return property; 3685 fail: 3686 kfree(property->values); 3687 kfree(property); 3688 return NULL; 3689 } 3690 EXPORT_SYMBOL(drm_property_create); 3691 3692 /** 3693 * drm_property_create_enum - create a new enumeration property type 3694 * @dev: drm device 3695 * @flags: flags specifying the property type 3696 * @name: name of the property 3697 * @props: enumeration lists with property values 3698 * @num_values: number of pre-defined values 3699 * 3700 * This creates a new generic drm property which can then be attached to a drm 3701 * object with drm_object_attach_property. The returned property object must be 3702 * freed with drm_property_destroy. 3703 * 3704 * Userspace is only allowed to set one of the predefined values for enumeration 3705 * properties. 3706 * 3707 * Returns: 3708 * A pointer to the newly created property on success, NULL on failure. 3709 */ 3710 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3711 const char *name, 3712 const struct drm_prop_enum_list *props, 3713 int num_values) 3714 { 3715 struct drm_property *property; 3716 int i, ret; 3717 3718 flags |= DRM_MODE_PROP_ENUM; 3719 3720 property = drm_property_create(dev, flags, name, num_values); 3721 if (!property) 3722 return NULL; 3723 3724 for (i = 0; i < num_values; i++) { 3725 ret = drm_property_add_enum(property, i, 3726 props[i].type, 3727 props[i].name); 3728 if (ret) { 3729 drm_property_destroy(dev, property); 3730 return NULL; 3731 } 3732 } 3733 3734 return property; 3735 } 3736 EXPORT_SYMBOL(drm_property_create_enum); 3737 3738 /** 3739 * drm_property_create_bitmask - create a new bitmask property type 3740 * @dev: drm device 3741 * @flags: flags specifying the property type 3742 * @name: name of the property 3743 * @props: enumeration lists with property bitflags 3744 * @num_props: size of the @props array 3745 * @supported_bits: bitmask of all supported enumeration values 3746 * 3747 * This creates a new bitmask drm property which can then be attached to a drm 3748 * object with drm_object_attach_property. The returned property object must be 3749 * freed with drm_property_destroy. 3750 * 3751 * Compared to plain enumeration properties userspace is allowed to set any 3752 * or'ed together combination of the predefined property bitflag values 3753 * 3754 * Returns: 3755 * A pointer to the newly created property on success, NULL on failure. 3756 */ 3757 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3758 int flags, const char *name, 3759 const struct drm_prop_enum_list *props, 3760 int num_props, 3761 uint64_t supported_bits) 3762 { 3763 struct drm_property *property; 3764 int i, ret, index = 0; 3765 int num_values = hweight64(supported_bits); 3766 3767 flags |= DRM_MODE_PROP_BITMASK; 3768 3769 property = drm_property_create(dev, flags, name, num_values); 3770 if (!property) 3771 return NULL; 3772 for (i = 0; i < num_props; i++) { 3773 if (!(supported_bits & (1ULL << props[i].type))) 3774 continue; 3775 3776 if (WARN_ON(index >= num_values)) { 3777 drm_property_destroy(dev, property); 3778 return NULL; 3779 } 3780 3781 ret = drm_property_add_enum(property, index++, 3782 props[i].type, 3783 props[i].name); 3784 if (ret) { 3785 drm_property_destroy(dev, property); 3786 return NULL; 3787 } 3788 } 3789 3790 return property; 3791 } 3792 EXPORT_SYMBOL(drm_property_create_bitmask); 3793 3794 static struct drm_property *property_create_range(struct drm_device *dev, 3795 int flags, const char *name, 3796 uint64_t min, uint64_t max) 3797 { 3798 struct drm_property *property; 3799 3800 property = drm_property_create(dev, flags, name, 2); 3801 if (!property) 3802 return NULL; 3803 3804 property->values[0] = min; 3805 property->values[1] = max; 3806 3807 return property; 3808 } 3809 3810 /** 3811 * drm_property_create_range - create a new unsigned ranged property type 3812 * @dev: drm device 3813 * @flags: flags specifying the property type 3814 * @name: name of the property 3815 * @min: minimum value of the property 3816 * @max: maximum value of the property 3817 * 3818 * This creates a new generic drm property which can then be attached to a drm 3819 * object with drm_object_attach_property. The returned property object must be 3820 * freed with drm_property_destroy. 3821 * 3822 * Userspace is allowed to set any unsigned integer value in the (min, max) 3823 * range inclusive. 3824 * 3825 * Returns: 3826 * A pointer to the newly created property on success, NULL on failure. 3827 */ 3828 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3829 const char *name, 3830 uint64_t min, uint64_t max) 3831 { 3832 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3833 name, min, max); 3834 } 3835 EXPORT_SYMBOL(drm_property_create_range); 3836 3837 /** 3838 * drm_property_create_signed_range - create a new signed ranged property type 3839 * @dev: drm device 3840 * @flags: flags specifying the property type 3841 * @name: name of the property 3842 * @min: minimum value of the property 3843 * @max: maximum value of the property 3844 * 3845 * This creates a new generic drm property which can then be attached to a drm 3846 * object with drm_object_attach_property. The returned property object must be 3847 * freed with drm_property_destroy. 3848 * 3849 * Userspace is allowed to set any signed integer value in the (min, max) 3850 * range inclusive. 3851 * 3852 * Returns: 3853 * A pointer to the newly created property on success, NULL on failure. 3854 */ 3855 struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3856 int flags, const char *name, 3857 int64_t min, int64_t max) 3858 { 3859 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3860 name, I642U64(min), I642U64(max)); 3861 } 3862 EXPORT_SYMBOL(drm_property_create_signed_range); 3863 3864 /** 3865 * drm_property_create_object - create a new object property type 3866 * @dev: drm device 3867 * @flags: flags specifying the property type 3868 * @name: name of the property 3869 * @type: object type from DRM_MODE_OBJECT_* defines 3870 * 3871 * This creates a new generic drm property which can then be attached to a drm 3872 * object with drm_object_attach_property. The returned property object must be 3873 * freed with drm_property_destroy. 3874 * 3875 * Userspace is only allowed to set this to any property value of the given 3876 * @type. Only useful for atomic properties, which is enforced. 3877 * 3878 * Returns: 3879 * A pointer to the newly created property on success, NULL on failure. 3880 */ 3881 struct drm_property *drm_property_create_object(struct drm_device *dev, 3882 int flags, const char *name, uint32_t type) 3883 { 3884 struct drm_property *property; 3885 3886 flags |= DRM_MODE_PROP_OBJECT; 3887 3888 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) 3889 return NULL; 3890 3891 property = drm_property_create(dev, flags, name, 1); 3892 if (!property) 3893 return NULL; 3894 3895 property->values[0] = type; 3896 3897 return property; 3898 } 3899 EXPORT_SYMBOL(drm_property_create_object); 3900 3901 /** 3902 * drm_property_create_bool - create a new boolean property type 3903 * @dev: drm device 3904 * @flags: flags specifying the property type 3905 * @name: name of the property 3906 * 3907 * This creates a new generic drm property which can then be attached to a drm 3908 * object with drm_object_attach_property. The returned property object must be 3909 * freed with drm_property_destroy. 3910 * 3911 * This is implemented as a ranged property with only {0, 1} as valid values. 3912 * 3913 * Returns: 3914 * A pointer to the newly created property on success, NULL on failure. 3915 */ 3916 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, 3917 const char *name) 3918 { 3919 return drm_property_create_range(dev, flags, name, 0, 1); 3920 } 3921 EXPORT_SYMBOL(drm_property_create_bool); 3922 3923 /** 3924 * drm_property_add_enum - add a possible value to an enumeration property 3925 * @property: enumeration property to change 3926 * @index: index of the new enumeration 3927 * @value: value of the new enumeration 3928 * @name: symbolic name of the new enumeration 3929 * 3930 * This functions adds enumerations to a property. 3931 * 3932 * It's use is deprecated, drivers should use one of the more specific helpers 3933 * to directly create the property with all enumerations already attached. 3934 * 3935 * Returns: 3936 * Zero on success, error code on failure. 3937 */ 3938 int drm_property_add_enum(struct drm_property *property, int index, 3939 uint64_t value, const char *name) 3940 { 3941 struct drm_property_enum *prop_enum; 3942 3943 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3944 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3945 return -EINVAL; 3946 3947 /* 3948 * Bitmask enum properties have the additional constraint of values 3949 * from 0 to 63 3950 */ 3951 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3952 (value > 63)) 3953 return -EINVAL; 3954 3955 if (!list_empty(&property->enum_list)) { 3956 list_for_each_entry(prop_enum, &property->enum_list, head) { 3957 if (prop_enum->value == value) { 3958 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3959 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3960 return 0; 3961 } 3962 } 3963 } 3964 3965 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3966 if (!prop_enum) 3967 return -ENOMEM; 3968 3969 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3970 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3971 prop_enum->value = value; 3972 3973 property->values[index] = value; 3974 list_add_tail(&prop_enum->head, &property->enum_list); 3975 return 0; 3976 } 3977 EXPORT_SYMBOL(drm_property_add_enum); 3978 3979 /** 3980 * drm_property_destroy - destroy a drm property 3981 * @dev: drm device 3982 * @property: property to destry 3983 * 3984 * This function frees a property including any attached resources like 3985 * enumeration values. 3986 */ 3987 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 3988 { 3989 struct drm_property_enum *prop_enum, *pt; 3990 3991 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 3992 list_del(&prop_enum->head); 3993 kfree(prop_enum); 3994 } 3995 3996 if (property->num_values) 3997 kfree(property->values); 3998 drm_mode_object_put(dev, &property->base); 3999 list_del(&property->head); 4000 kfree(property); 4001 } 4002 EXPORT_SYMBOL(drm_property_destroy); 4003 4004 /** 4005 * drm_object_attach_property - attach a property to a modeset object 4006 * @obj: drm modeset object 4007 * @property: property to attach 4008 * @init_val: initial value of the property 4009 * 4010 * This attaches the given property to the modeset object with the given initial 4011 * value. Currently this function cannot fail since the properties are stored in 4012 * a statically sized array. 4013 */ 4014 void drm_object_attach_property(struct drm_mode_object *obj, 4015 struct drm_property *property, 4016 uint64_t init_val) 4017 { 4018 int count = obj->properties->count; 4019 4020 if (count == DRM_OBJECT_MAX_PROPERTY) { 4021 WARN(1, "Failed to attach object property (type: 0x%x). Please " 4022 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 4023 "you see this message on the same object type.\n", 4024 obj->type); 4025 return; 4026 } 4027 4028 obj->properties->properties[count] = property; 4029 obj->properties->values[count] = init_val; 4030 obj->properties->count++; 4031 if (property->flags & DRM_MODE_PROP_ATOMIC) 4032 obj->properties->atomic_count++; 4033 } 4034 EXPORT_SYMBOL(drm_object_attach_property); 4035 4036 /** 4037 * drm_object_property_set_value - set the value of a property 4038 * @obj: drm mode object to set property value for 4039 * @property: property to set 4040 * @val: value the property should be set to 4041 * 4042 * This functions sets a given property on a given object. This function only 4043 * changes the software state of the property, it does not call into the 4044 * driver's ->set_property callback. 4045 * 4046 * Returns: 4047 * Zero on success, error code on failure. 4048 */ 4049 int drm_object_property_set_value(struct drm_mode_object *obj, 4050 struct drm_property *property, uint64_t val) 4051 { 4052 int i; 4053 4054 for (i = 0; i < obj->properties->count; i++) { 4055 if (obj->properties->properties[i] == property) { 4056 obj->properties->values[i] = val; 4057 return 0; 4058 } 4059 } 4060 4061 return -EINVAL; 4062 } 4063 EXPORT_SYMBOL(drm_object_property_set_value); 4064 4065 /** 4066 * drm_object_property_get_value - retrieve the value of a property 4067 * @obj: drm mode object to get property value from 4068 * @property: property to retrieve 4069 * @val: storage for the property value 4070 * 4071 * This function retrieves the softare state of the given property for the given 4072 * property. Since there is no driver callback to retrieve the current property 4073 * value this might be out of sync with the hardware, depending upon the driver 4074 * and property. 4075 * 4076 * Returns: 4077 * Zero on success, error code on failure. 4078 */ 4079 int drm_object_property_get_value(struct drm_mode_object *obj, 4080 struct drm_property *property, uint64_t *val) 4081 { 4082 int i; 4083 4084 /* read-only properties bypass atomic mechanism and still store 4085 * their value in obj->properties->values[].. mostly to avoid 4086 * having to deal w/ EDID and similar props in atomic paths: 4087 */ 4088 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && 4089 !(property->flags & DRM_MODE_PROP_IMMUTABLE)) 4090 return drm_atomic_get_property(obj, property, val); 4091 4092 for (i = 0; i < obj->properties->count; i++) { 4093 if (obj->properties->properties[i] == property) { 4094 *val = obj->properties->values[i]; 4095 return 0; 4096 } 4097 } 4098 4099 return -EINVAL; 4100 } 4101 EXPORT_SYMBOL(drm_object_property_get_value); 4102 4103 /** 4104 * drm_mode_getproperty_ioctl - get the property metadata 4105 * @dev: DRM device 4106 * @data: ioctl data 4107 * @file_priv: DRM file info 4108 * 4109 * This function retrieves the metadata for a given property, like the different 4110 * possible values for an enum property or the limits for a range property. 4111 * 4112 * Blob properties are special 4113 * 4114 * Called by the user via ioctl. 4115 * 4116 * Returns: 4117 * Zero on success, negative errno on failure. 4118 */ 4119 int drm_mode_getproperty_ioctl(struct drm_device *dev, 4120 void *data, struct drm_file *file_priv) 4121 { 4122 struct drm_mode_get_property *out_resp = data; 4123 struct drm_property *property; 4124 int enum_count = 0; 4125 int value_count = 0; 4126 int ret = 0, i; 4127 int copied; 4128 struct drm_property_enum *prop_enum; 4129 struct drm_mode_property_enum __user *enum_ptr; 4130 uint64_t __user *values_ptr; 4131 4132 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4133 return -EINVAL; 4134 4135 drm_modeset_lock_all(dev); 4136 property = drm_property_find(dev, out_resp->prop_id); 4137 if (!property) { 4138 ret = -ENOENT; 4139 goto done; 4140 } 4141 4142 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4143 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4144 list_for_each_entry(prop_enum, &property->enum_list, head) 4145 enum_count++; 4146 } 4147 4148 value_count = property->num_values; 4149 4150 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 4151 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 4152 out_resp->flags = property->flags; 4153 4154 if ((out_resp->count_values >= value_count) && value_count) { 4155 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 4156 for (i = 0; i < value_count; i++) { 4157 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 4158 ret = -EFAULT; 4159 goto done; 4160 } 4161 } 4162 } 4163 out_resp->count_values = value_count; 4164 4165 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4166 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4167 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 4168 copied = 0; 4169 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 4170 list_for_each_entry(prop_enum, &property->enum_list, head) { 4171 4172 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 4173 ret = -EFAULT; 4174 goto done; 4175 } 4176 4177 if (copy_to_user(&enum_ptr[copied].name, 4178 &prop_enum->name, DRM_PROP_NAME_LEN)) { 4179 ret = -EFAULT; 4180 goto done; 4181 } 4182 copied++; 4183 } 4184 } 4185 out_resp->count_enum_blobs = enum_count; 4186 } 4187 4188 /* 4189 * NOTE: The idea seems to have been to use this to read all the blob 4190 * property values. But nothing ever added them to the corresponding 4191 * list, userspace always used the special-purpose get_blob ioctl to 4192 * read the value for a blob property. It also doesn't make a lot of 4193 * sense to return values here when everything else is just metadata for 4194 * the property itself. 4195 */ 4196 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4197 out_resp->count_enum_blobs = 0; 4198 done: 4199 drm_modeset_unlock_all(dev); 4200 return ret; 4201 } 4202 4203 /** 4204 * drm_property_create_blob - Create new blob property 4205 * 4206 * Creates a new blob property for a specified DRM device, optionally 4207 * copying data. 4208 * 4209 * @dev: DRM device to create property for 4210 * @length: Length to allocate for blob data 4211 * @data: If specified, copies data into blob 4212 * 4213 * Returns: 4214 * New blob property with a single reference on success, or an ERR_PTR 4215 * value on failure. 4216 */ 4217 struct drm_property_blob * 4218 drm_property_create_blob(struct drm_device *dev, size_t length, 4219 const void *data) 4220 { 4221 struct drm_property_blob *blob; 4222 int ret; 4223 4224 if (!length) 4225 return ERR_PTR(-EINVAL); 4226 4227 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4228 if (!blob) 4229 return ERR_PTR(-ENOMEM); 4230 4231 /* This must be explicitly initialised, so we can safely call list_del 4232 * on it in the removal handler, even if it isn't in a file list. */ 4233 INIT_LIST_HEAD(&blob->head_file); 4234 blob->length = length; 4235 blob->dev = dev; 4236 4237 if (data) 4238 memcpy(blob->data, data, length); 4239 4240 mutex_lock(&dev->mode_config.blob_lock); 4241 4242 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 4243 if (ret) { 4244 kfree(blob); 4245 mutex_unlock(&dev->mode_config.blob_lock); 4246 return ERR_PTR(-EINVAL); 4247 } 4248 4249 kref_init(&blob->refcount); 4250 4251 list_add_tail(&blob->head_global, 4252 &dev->mode_config.property_blob_list); 4253 4254 mutex_unlock(&dev->mode_config.blob_lock); 4255 4256 return blob; 4257 } 4258 EXPORT_SYMBOL(drm_property_create_blob); 4259 4260 /** 4261 * drm_property_free_blob - Blob property destructor 4262 * 4263 * Internal free function for blob properties; must not be used directly. 4264 * 4265 * @kref: Reference 4266 */ 4267 static void drm_property_free_blob(struct kref *kref) 4268 { 4269 struct drm_property_blob *blob = 4270 container_of(kref, struct drm_property_blob, refcount); 4271 4272 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock)); 4273 4274 list_del(&blob->head_global); 4275 list_del(&blob->head_file); 4276 drm_mode_object_put(blob->dev, &blob->base); 4277 4278 kfree(blob); 4279 } 4280 4281 /** 4282 * drm_property_unreference_blob - Unreference a blob property 4283 * 4284 * Drop a reference on a blob property. May free the object. 4285 * 4286 * @blob: Pointer to blob property 4287 */ 4288 void drm_property_unreference_blob(struct drm_property_blob *blob) 4289 { 4290 struct drm_device *dev; 4291 4292 if (!blob) 4293 return; 4294 4295 dev = blob->dev; 4296 4297 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4298 4299 if (kref_put_mutex(&blob->refcount, drm_property_free_blob, 4300 &dev->mode_config.blob_lock)) 4301 mutex_unlock(&dev->mode_config.blob_lock); 4302 else 4303 might_lock(&dev->mode_config.blob_lock); 4304 4305 } 4306 EXPORT_SYMBOL(drm_property_unreference_blob); 4307 4308 /** 4309 * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held 4310 * 4311 * Drop a reference on a blob property. May free the object. This must be 4312 * called with blob_lock held. 4313 * 4314 * @blob: Pointer to blob property 4315 */ 4316 static void drm_property_unreference_blob_locked(struct drm_property_blob *blob) 4317 { 4318 if (!blob) 4319 return; 4320 4321 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4322 4323 kref_put(&blob->refcount, drm_property_free_blob); 4324 } 4325 4326 /** 4327 * drm_property_destroy_user_blobs - destroy all blobs created by this client 4328 * @dev: DRM device 4329 * @file_priv: destroy all blobs owned by this file handle 4330 */ 4331 void drm_property_destroy_user_blobs(struct drm_device *dev, 4332 struct drm_file *file_priv) 4333 { 4334 struct drm_property_blob *blob, *bt; 4335 4336 mutex_lock(&dev->mode_config.blob_lock); 4337 4338 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) { 4339 list_del_init(&blob->head_file); 4340 drm_property_unreference_blob_locked(blob); 4341 } 4342 4343 mutex_unlock(&dev->mode_config.blob_lock); 4344 } 4345 4346 /** 4347 * drm_property_reference_blob - Take a reference on an existing property 4348 * 4349 * Take a new reference on an existing blob property. 4350 * 4351 * @blob: Pointer to blob property 4352 */ 4353 struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob) 4354 { 4355 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4356 kref_get(&blob->refcount); 4357 return blob; 4358 } 4359 EXPORT_SYMBOL(drm_property_reference_blob); 4360 4361 /* 4362 * Like drm_property_lookup_blob, but does not return an additional reference. 4363 * Must be called with blob_lock held. 4364 */ 4365 static struct drm_property_blob *__drm_property_lookup_blob(struct drm_device *dev, 4366 uint32_t id) 4367 { 4368 struct drm_mode_object *obj = NULL; 4369 struct drm_property_blob *blob; 4370 4371 WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock)); 4372 4373 mutex_lock(&dev->mode_config.idr_mutex); 4374 obj = idr_find(&dev->mode_config.crtc_idr, id); 4375 if (!obj || (obj->type != DRM_MODE_OBJECT_BLOB) || (obj->id != id)) 4376 blob = NULL; 4377 else 4378 blob = obj_to_blob(obj); 4379 mutex_unlock(&dev->mode_config.idr_mutex); 4380 4381 return blob; 4382 } 4383 4384 /** 4385 * drm_property_lookup_blob - look up a blob property and take a reference 4386 * @dev: drm device 4387 * @id: id of the blob property 4388 * 4389 * If successful, this takes an additional reference to the blob property. 4390 * callers need to make sure to eventually unreference the returned property 4391 * again, using @drm_property_unreference_blob. 4392 */ 4393 struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev, 4394 uint32_t id) 4395 { 4396 struct drm_property_blob *blob; 4397 4398 mutex_lock(&dev->mode_config.blob_lock); 4399 blob = __drm_property_lookup_blob(dev, id); 4400 if (blob) { 4401 if (!kref_get_unless_zero(&blob->refcount)) 4402 blob = NULL; 4403 } 4404 mutex_unlock(&dev->mode_config.blob_lock); 4405 4406 return blob; 4407 } 4408 EXPORT_SYMBOL(drm_property_lookup_blob); 4409 4410 /** 4411 * drm_property_replace_global_blob - atomically replace existing blob property 4412 * @dev: drm device 4413 * @replace: location of blob property pointer to be replaced 4414 * @length: length of data for new blob, or 0 for no data 4415 * @data: content for new blob, or NULL for no data 4416 * @obj_holds_id: optional object for property holding blob ID 4417 * @prop_holds_id: optional property holding blob ID 4418 * @return 0 on success or error on failure 4419 * 4420 * This function will atomically replace a global property in the blob list, 4421 * optionally updating a property which holds the ID of that property. It is 4422 * guaranteed to be atomic: no caller will be allowed to see intermediate 4423 * results, and either the entire operation will succeed and clean up the 4424 * previous property, or it will fail and the state will be unchanged. 4425 * 4426 * If length is 0 or data is NULL, no new blob will be created, and the holding 4427 * property, if specified, will be set to 0. 4428 * 4429 * Access to the replace pointer is assumed to be protected by the caller, e.g. 4430 * by holding the relevant modesetting object lock for its parent. 4431 * 4432 * For example, a drm_connector has a 'PATH' property, which contains the ID 4433 * of a blob property with the value of the MST path information. Calling this 4434 * function with replace pointing to the connector's path_blob_ptr, length and 4435 * data set for the new path information, obj_holds_id set to the connector's 4436 * base object, and prop_holds_id set to the path property name, will perform 4437 * a completely atomic update. The access to path_blob_ptr is protected by the 4438 * caller holding a lock on the connector. 4439 */ 4440 static int drm_property_replace_global_blob(struct drm_device *dev, 4441 struct drm_property_blob **replace, 4442 size_t length, 4443 const void *data, 4444 struct drm_mode_object *obj_holds_id, 4445 struct drm_property *prop_holds_id) 4446 { 4447 struct drm_property_blob *new_blob = NULL; 4448 struct drm_property_blob *old_blob = NULL; 4449 int ret; 4450 4451 WARN_ON(replace == NULL); 4452 4453 old_blob = *replace; 4454 4455 if (length && data) { 4456 new_blob = drm_property_create_blob(dev, length, data); 4457 if (IS_ERR(new_blob)) 4458 return PTR_ERR(new_blob); 4459 } 4460 4461 /* This does not need to be synchronised with blob_lock, as the 4462 * get_properties ioctl locks all modesetting objects, and 4463 * obj_holds_id must be locked before calling here, so we cannot 4464 * have its value out of sync with the list membership modified 4465 * below under blob_lock. */ 4466 if (obj_holds_id) { 4467 ret = drm_object_property_set_value(obj_holds_id, 4468 prop_holds_id, 4469 new_blob ? 4470 new_blob->base.id : 0); 4471 if (ret != 0) 4472 goto err_created; 4473 } 4474 4475 if (old_blob) 4476 drm_property_unreference_blob(old_blob); 4477 4478 *replace = new_blob; 4479 4480 return 0; 4481 4482 err_created: 4483 drm_property_unreference_blob(new_blob); 4484 return ret; 4485 } 4486 4487 /** 4488 * drm_mode_getblob_ioctl - get the contents of a blob property value 4489 * @dev: DRM device 4490 * @data: ioctl data 4491 * @file_priv: DRM file info 4492 * 4493 * This function retrieves the contents of a blob property. The value stored in 4494 * an object's blob property is just a normal modeset object id. 4495 * 4496 * Called by the user via ioctl. 4497 * 4498 * Returns: 4499 * Zero on success, negative errno on failure. 4500 */ 4501 int drm_mode_getblob_ioctl(struct drm_device *dev, 4502 void *data, struct drm_file *file_priv) 4503 { 4504 struct drm_mode_get_blob *out_resp = data; 4505 struct drm_property_blob *blob; 4506 int ret = 0; 4507 void __user *blob_ptr; 4508 4509 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4510 return -EINVAL; 4511 4512 drm_modeset_lock_all(dev); 4513 mutex_lock(&dev->mode_config.blob_lock); 4514 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4515 if (!blob) { 4516 ret = -ENOENT; 4517 goto done; 4518 } 4519 4520 if (out_resp->length == blob->length) { 4521 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4522 if (copy_to_user(blob_ptr, blob->data, blob->length)) { 4523 ret = -EFAULT; 4524 goto done; 4525 } 4526 } 4527 out_resp->length = blob->length; 4528 4529 done: 4530 mutex_unlock(&dev->mode_config.blob_lock); 4531 drm_modeset_unlock_all(dev); 4532 return ret; 4533 } 4534 4535 /** 4536 * drm_mode_createblob_ioctl - create a new blob property 4537 * @dev: DRM device 4538 * @data: ioctl data 4539 * @file_priv: DRM file info 4540 * 4541 * This function creates a new blob property with user-defined values. In order 4542 * to give us sensible validation and checking when creating, rather than at 4543 * every potential use, we also require a type to be provided upfront. 4544 * 4545 * Called by the user via ioctl. 4546 * 4547 * Returns: 4548 * Zero on success, negative errno on failure. 4549 */ 4550 int drm_mode_createblob_ioctl(struct drm_device *dev, 4551 void *data, struct drm_file *file_priv) 4552 { 4553 struct drm_mode_create_blob *out_resp = data; 4554 struct drm_property_blob *blob; 4555 void __user *blob_ptr; 4556 int ret = 0; 4557 4558 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4559 return -EINVAL; 4560 4561 blob = drm_property_create_blob(dev, out_resp->length, NULL); 4562 if (IS_ERR(blob)) 4563 return PTR_ERR(blob); 4564 4565 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4566 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) { 4567 ret = -EFAULT; 4568 goto out_blob; 4569 } 4570 4571 /* Dropping the lock between create_blob and our access here is safe 4572 * as only the same file_priv can remove the blob; at this point, it is 4573 * not associated with any file_priv. */ 4574 mutex_lock(&dev->mode_config.blob_lock); 4575 out_resp->blob_id = blob->base.id; 4576 list_add_tail(&file_priv->blobs, &blob->head_file); 4577 mutex_unlock(&dev->mode_config.blob_lock); 4578 4579 return 0; 4580 4581 out_blob: 4582 drm_property_unreference_blob(blob); 4583 return ret; 4584 } 4585 4586 /** 4587 * drm_mode_destroyblob_ioctl - destroy a user blob property 4588 * @dev: DRM device 4589 * @data: ioctl data 4590 * @file_priv: DRM file info 4591 * 4592 * Destroy an existing user-defined blob property. 4593 * 4594 * Called by the user via ioctl. 4595 * 4596 * Returns: 4597 * Zero on success, negative errno on failure. 4598 */ 4599 int drm_mode_destroyblob_ioctl(struct drm_device *dev, 4600 void *data, struct drm_file *file_priv) 4601 { 4602 struct drm_mode_destroy_blob *out_resp = data; 4603 struct drm_property_blob *blob = NULL, *bt; 4604 bool found = false; 4605 int ret = 0; 4606 4607 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4608 return -EINVAL; 4609 4610 mutex_lock(&dev->mode_config.blob_lock); 4611 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4612 if (!blob) { 4613 ret = -ENOENT; 4614 goto err; 4615 } 4616 4617 /* Ensure the property was actually created by this user. */ 4618 list_for_each_entry(bt, &file_priv->blobs, head_file) { 4619 if (bt == blob) { 4620 found = true; 4621 break; 4622 } 4623 } 4624 4625 if (!found) { 4626 ret = -EPERM; 4627 goto err; 4628 } 4629 4630 /* We must drop head_file here, because we may not be the last 4631 * reference on the blob. */ 4632 list_del_init(&blob->head_file); 4633 drm_property_unreference_blob_locked(blob); 4634 mutex_unlock(&dev->mode_config.blob_lock); 4635 4636 return 0; 4637 4638 err: 4639 mutex_unlock(&dev->mode_config.blob_lock); 4640 return ret; 4641 } 4642 4643 /** 4644 * drm_mode_connector_set_path_property - set tile property on connector 4645 * @connector: connector to set property on. 4646 * @path: path to use for property; must not be NULL. 4647 * 4648 * This creates a property to expose to userspace to specify a 4649 * connector path. This is mainly used for DisplayPort MST where 4650 * connectors have a topology and we want to allow userspace to give 4651 * them more meaningful names. 4652 * 4653 * Returns: 4654 * Zero on success, negative errno on failure. 4655 */ 4656 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4657 const char *path) 4658 { 4659 struct drm_device *dev = connector->dev; 4660 int ret; 4661 4662 ret = drm_property_replace_global_blob(dev, 4663 &connector->path_blob_ptr, 4664 strlen(path) + 1, 4665 path, 4666 &connector->base, 4667 dev->mode_config.path_property); 4668 return ret; 4669 } 4670 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4671 4672 /** 4673 * drm_mode_connector_set_tile_property - set tile property on connector 4674 * @connector: connector to set property on. 4675 * 4676 * This looks up the tile information for a connector, and creates a 4677 * property for userspace to parse if it exists. The property is of 4678 * the form of 8 integers using ':' as a separator. 4679 * 4680 * Returns: 4681 * Zero on success, errno on failure. 4682 */ 4683 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4684 { 4685 struct drm_device *dev = connector->dev; 4686 char tile[256]; 4687 int ret; 4688 4689 if (!connector->has_tile) { 4690 ret = drm_property_replace_global_blob(dev, 4691 &connector->tile_blob_ptr, 4692 0, 4693 NULL, 4694 &connector->base, 4695 dev->mode_config.tile_property); 4696 return ret; 4697 } 4698 4699 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4700 connector->tile_group->id, connector->tile_is_single_monitor, 4701 connector->num_h_tile, connector->num_v_tile, 4702 connector->tile_h_loc, connector->tile_v_loc, 4703 connector->tile_h_size, connector->tile_v_size); 4704 4705 ret = drm_property_replace_global_blob(dev, 4706 &connector->tile_blob_ptr, 4707 strlen(tile) + 1, 4708 tile, 4709 &connector->base, 4710 dev->mode_config.tile_property); 4711 return ret; 4712 } 4713 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4714 4715 /** 4716 * drm_mode_connector_update_edid_property - update the edid property of a connector 4717 * @connector: drm connector 4718 * @edid: new value of the edid property 4719 * 4720 * This function creates a new blob modeset object and assigns its id to the 4721 * connector's edid property. 4722 * 4723 * Returns: 4724 * Zero on success, negative errno on failure. 4725 */ 4726 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4727 const struct edid *edid) 4728 { 4729 struct drm_device *dev = connector->dev; 4730 size_t size = 0; 4731 int ret; 4732 4733 /* ignore requests to set edid when overridden */ 4734 if (connector->override_edid) 4735 return 0; 4736 4737 if (edid) 4738 size = EDID_LENGTH * (1 + edid->extensions); 4739 4740 ret = drm_property_replace_global_blob(dev, 4741 &connector->edid_blob_ptr, 4742 size, 4743 edid, 4744 &connector->base, 4745 dev->mode_config.edid_property); 4746 return ret; 4747 } 4748 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4749 4750 /* Some properties could refer to dynamic refcnt'd objects, or things that 4751 * need special locking to handle lifetime issues (ie. to ensure the prop 4752 * value doesn't become invalid part way through the property update due to 4753 * race). The value returned by reference via 'obj' should be passed back 4754 * to drm_property_change_valid_put() after the property is set (and the 4755 * object to which the property is attached has a chance to take it's own 4756 * reference). 4757 */ 4758 bool drm_property_change_valid_get(struct drm_property *property, 4759 uint64_t value, struct drm_mode_object **ref) 4760 { 4761 int i; 4762 4763 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4764 return false; 4765 4766 *ref = NULL; 4767 4768 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4769 if (value < property->values[0] || value > property->values[1]) 4770 return false; 4771 return true; 4772 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4773 int64_t svalue = U642I64(value); 4774 4775 if (svalue < U642I64(property->values[0]) || 4776 svalue > U642I64(property->values[1])) 4777 return false; 4778 return true; 4779 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4780 uint64_t valid_mask = 0; 4781 4782 for (i = 0; i < property->num_values; i++) 4783 valid_mask |= (1ULL << property->values[i]); 4784 return !(value & ~valid_mask); 4785 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4786 struct drm_property_blob *blob; 4787 4788 if (value == 0) 4789 return true; 4790 4791 blob = drm_property_lookup_blob(property->dev, value); 4792 if (blob) { 4793 *ref = &blob->base; 4794 return true; 4795 } else { 4796 return false; 4797 } 4798 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4799 /* a zero value for an object property translates to null: */ 4800 if (value == 0) 4801 return true; 4802 4803 /* handle refcnt'd objects specially: */ 4804 if (property->values[0] == DRM_MODE_OBJECT_FB) { 4805 struct drm_framebuffer *fb; 4806 fb = drm_framebuffer_lookup(property->dev, value); 4807 if (fb) { 4808 *ref = &fb->base; 4809 return true; 4810 } else { 4811 return false; 4812 } 4813 } else { 4814 return _object_find(property->dev, value, property->values[0]) != NULL; 4815 } 4816 } 4817 4818 for (i = 0; i < property->num_values; i++) 4819 if (property->values[i] == value) 4820 return true; 4821 return false; 4822 } 4823 4824 void drm_property_change_valid_put(struct drm_property *property, 4825 struct drm_mode_object *ref) 4826 { 4827 if (!ref) 4828 return; 4829 4830 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4831 if (property->values[0] == DRM_MODE_OBJECT_FB) 4832 drm_framebuffer_unreference(obj_to_fb(ref)); 4833 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4834 drm_property_unreference_blob(obj_to_blob(ref)); 4835 } 4836 4837 /** 4838 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4839 * @dev: DRM device 4840 * @data: ioctl data 4841 * @file_priv: DRM file info 4842 * 4843 * This function sets the current value for a connectors's property. It also 4844 * calls into a driver's ->set_property callback to update the hardware state 4845 * 4846 * Called by the user via ioctl. 4847 * 4848 * Returns: 4849 * Zero on success, negative errno on failure. 4850 */ 4851 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4852 void *data, struct drm_file *file_priv) 4853 { 4854 struct drm_mode_connector_set_property *conn_set_prop = data; 4855 struct drm_mode_obj_set_property obj_set_prop = { 4856 .value = conn_set_prop->value, 4857 .prop_id = conn_set_prop->prop_id, 4858 .obj_id = conn_set_prop->connector_id, 4859 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4860 }; 4861 4862 /* It does all the locking and checking we need */ 4863 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4864 } 4865 4866 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4867 struct drm_property *property, 4868 uint64_t value) 4869 { 4870 int ret = -EINVAL; 4871 struct drm_connector *connector = obj_to_connector(obj); 4872 4873 /* Do DPMS ourselves */ 4874 if (property == connector->dev->mode_config.dpms_property) { 4875 if (connector->funcs->dpms) 4876 (*connector->funcs->dpms)(connector, (int)value); 4877 ret = 0; 4878 } else if (connector->funcs->set_property) 4879 ret = connector->funcs->set_property(connector, property, value); 4880 4881 /* store the property value if successful */ 4882 if (!ret) 4883 drm_object_property_set_value(&connector->base, property, value); 4884 return ret; 4885 } 4886 4887 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4888 struct drm_property *property, 4889 uint64_t value) 4890 { 4891 int ret = -EINVAL; 4892 struct drm_crtc *crtc = obj_to_crtc(obj); 4893 4894 if (crtc->funcs->set_property) 4895 ret = crtc->funcs->set_property(crtc, property, value); 4896 if (!ret) 4897 drm_object_property_set_value(obj, property, value); 4898 4899 return ret; 4900 } 4901 4902 /** 4903 * drm_mode_plane_set_obj_prop - set the value of a property 4904 * @plane: drm plane object to set property value for 4905 * @property: property to set 4906 * @value: value the property should be set to 4907 * 4908 * This functions sets a given property on a given plane object. This function 4909 * calls the driver's ->set_property callback and changes the software state of 4910 * the property if the callback succeeds. 4911 * 4912 * Returns: 4913 * Zero on success, error code on failure. 4914 */ 4915 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4916 struct drm_property *property, 4917 uint64_t value) 4918 { 4919 int ret = -EINVAL; 4920 struct drm_mode_object *obj = &plane->base; 4921 4922 if (plane->funcs->set_property) 4923 ret = plane->funcs->set_property(plane, property, value); 4924 if (!ret) 4925 drm_object_property_set_value(obj, property, value); 4926 4927 return ret; 4928 } 4929 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4930 4931 /** 4932 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 4933 * @dev: DRM device 4934 * @data: ioctl data 4935 * @file_priv: DRM file info 4936 * 4937 * This function retrieves the current value for an object's property. Compared 4938 * to the connector specific ioctl this one is extended to also work on crtc and 4939 * plane objects. 4940 * 4941 * Called by the user via ioctl. 4942 * 4943 * Returns: 4944 * Zero on success, negative errno on failure. 4945 */ 4946 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4947 struct drm_file *file_priv) 4948 { 4949 struct drm_mode_obj_get_properties *arg = data; 4950 struct drm_mode_object *obj; 4951 int ret = 0; 4952 4953 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4954 return -EINVAL; 4955 4956 drm_modeset_lock_all(dev); 4957 4958 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4959 if (!obj) { 4960 ret = -ENOENT; 4961 goto out; 4962 } 4963 if (!obj->properties) { 4964 ret = -EINVAL; 4965 goto out; 4966 } 4967 4968 ret = get_properties(obj, file_priv->atomic, 4969 (uint32_t __user *)(unsigned long)(arg->props_ptr), 4970 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), 4971 &arg->count_props); 4972 4973 out: 4974 drm_modeset_unlock_all(dev); 4975 return ret; 4976 } 4977 4978 /** 4979 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 4980 * @dev: DRM device 4981 * @data: ioctl data 4982 * @file_priv: DRM file info 4983 * 4984 * This function sets the current value for an object's property. It also calls 4985 * into a driver's ->set_property callback to update the hardware state. 4986 * Compared to the connector specific ioctl this one is extended to also work on 4987 * crtc and plane objects. 4988 * 4989 * Called by the user via ioctl. 4990 * 4991 * Returns: 4992 * Zero on success, negative errno on failure. 4993 */ 4994 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 4995 struct drm_file *file_priv) 4996 { 4997 struct drm_mode_obj_set_property *arg = data; 4998 struct drm_mode_object *arg_obj; 4999 struct drm_mode_object *prop_obj; 5000 struct drm_property *property; 5001 int i, ret = -EINVAL; 5002 struct drm_mode_object *ref; 5003 5004 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5005 return -EINVAL; 5006 5007 drm_modeset_lock_all(dev); 5008 5009 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 5010 if (!arg_obj) { 5011 ret = -ENOENT; 5012 goto out; 5013 } 5014 if (!arg_obj->properties) 5015 goto out; 5016 5017 for (i = 0; i < arg_obj->properties->count; i++) 5018 if (arg_obj->properties->properties[i]->base.id == arg->prop_id) 5019 break; 5020 5021 if (i == arg_obj->properties->count) 5022 goto out; 5023 5024 prop_obj = drm_mode_object_find(dev, arg->prop_id, 5025 DRM_MODE_OBJECT_PROPERTY); 5026 if (!prop_obj) { 5027 ret = -ENOENT; 5028 goto out; 5029 } 5030 property = obj_to_property(prop_obj); 5031 5032 if (!drm_property_change_valid_get(property, arg->value, &ref)) 5033 goto out; 5034 5035 switch (arg_obj->type) { 5036 case DRM_MODE_OBJECT_CONNECTOR: 5037 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 5038 arg->value); 5039 break; 5040 case DRM_MODE_OBJECT_CRTC: 5041 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 5042 break; 5043 case DRM_MODE_OBJECT_PLANE: 5044 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 5045 property, arg->value); 5046 break; 5047 } 5048 5049 drm_property_change_valid_put(property, ref); 5050 5051 out: 5052 drm_modeset_unlock_all(dev); 5053 return ret; 5054 } 5055 5056 /** 5057 * drm_mode_connector_attach_encoder - attach a connector to an encoder 5058 * @connector: connector to attach 5059 * @encoder: encoder to attach @connector to 5060 * 5061 * This function links up a connector to an encoder. Note that the routing 5062 * restrictions between encoders and crtcs are exposed to userspace through the 5063 * possible_clones and possible_crtcs bitmasks. 5064 * 5065 * Returns: 5066 * Zero on success, negative errno on failure. 5067 */ 5068 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 5069 struct drm_encoder *encoder) 5070 { 5071 int i; 5072 5073 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 5074 if (connector->encoder_ids[i] == 0) { 5075 connector->encoder_ids[i] = encoder->base.id; 5076 return 0; 5077 } 5078 } 5079 return -ENOMEM; 5080 } 5081 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 5082 5083 /** 5084 * drm_mode_crtc_set_gamma_size - set the gamma table size 5085 * @crtc: CRTC to set the gamma table size for 5086 * @gamma_size: size of the gamma table 5087 * 5088 * Drivers which support gamma tables should set this to the supported gamma 5089 * table size when initializing the CRTC. Currently the drm core only supports a 5090 * fixed gamma table size. 5091 * 5092 * Returns: 5093 * Zero on success, negative errno on failure. 5094 */ 5095 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 5096 int gamma_size) 5097 { 5098 crtc->gamma_size = gamma_size; 5099 5100 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, 5101 GFP_KERNEL); 5102 if (!crtc->gamma_store) { 5103 crtc->gamma_size = 0; 5104 return -ENOMEM; 5105 } 5106 5107 return 0; 5108 } 5109 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 5110 5111 /** 5112 * drm_mode_gamma_set_ioctl - set the gamma table 5113 * @dev: DRM device 5114 * @data: ioctl data 5115 * @file_priv: DRM file info 5116 * 5117 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 5118 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 5119 * 5120 * Called by the user via ioctl. 5121 * 5122 * Returns: 5123 * Zero on success, negative errno on failure. 5124 */ 5125 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 5126 void *data, struct drm_file *file_priv) 5127 { 5128 struct drm_mode_crtc_lut *crtc_lut = data; 5129 struct drm_crtc *crtc; 5130 void *r_base, *g_base, *b_base; 5131 int size; 5132 int ret = 0; 5133 5134 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5135 return -EINVAL; 5136 5137 drm_modeset_lock_all(dev); 5138 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5139 if (!crtc) { 5140 ret = -ENOENT; 5141 goto out; 5142 } 5143 5144 if (crtc->funcs->gamma_set == NULL) { 5145 ret = -ENOSYS; 5146 goto out; 5147 } 5148 5149 /* memcpy into gamma store */ 5150 if (crtc_lut->gamma_size != crtc->gamma_size) { 5151 ret = -EINVAL; 5152 goto out; 5153 } 5154 5155 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5156 r_base = crtc->gamma_store; 5157 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 5158 ret = -EFAULT; 5159 goto out; 5160 } 5161 5162 g_base = r_base + size; 5163 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 5164 ret = -EFAULT; 5165 goto out; 5166 } 5167 5168 b_base = g_base + size; 5169 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 5170 ret = -EFAULT; 5171 goto out; 5172 } 5173 5174 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 5175 5176 out: 5177 drm_modeset_unlock_all(dev); 5178 return ret; 5179 5180 } 5181 5182 /** 5183 * drm_mode_gamma_get_ioctl - get the gamma table 5184 * @dev: DRM device 5185 * @data: ioctl data 5186 * @file_priv: DRM file info 5187 * 5188 * Copy the current gamma table into the storage provided. This also provides 5189 * the gamma table size the driver expects, which can be used to size the 5190 * allocated storage. 5191 * 5192 * Called by the user via ioctl. 5193 * 5194 * Returns: 5195 * Zero on success, negative errno on failure. 5196 */ 5197 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 5198 void *data, struct drm_file *file_priv) 5199 { 5200 struct drm_mode_crtc_lut *crtc_lut = data; 5201 struct drm_crtc *crtc; 5202 void *r_base, *g_base, *b_base; 5203 int size; 5204 int ret = 0; 5205 5206 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5207 return -EINVAL; 5208 5209 drm_modeset_lock_all(dev); 5210 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5211 if (!crtc) { 5212 ret = -ENOENT; 5213 goto out; 5214 } 5215 5216 /* memcpy into gamma store */ 5217 if (crtc_lut->gamma_size != crtc->gamma_size) { 5218 ret = -EINVAL; 5219 goto out; 5220 } 5221 5222 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5223 r_base = crtc->gamma_store; 5224 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 5225 ret = -EFAULT; 5226 goto out; 5227 } 5228 5229 g_base = r_base + size; 5230 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 5231 ret = -EFAULT; 5232 goto out; 5233 } 5234 5235 b_base = g_base + size; 5236 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 5237 ret = -EFAULT; 5238 goto out; 5239 } 5240 out: 5241 drm_modeset_unlock_all(dev); 5242 return ret; 5243 } 5244 5245 /** 5246 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 5247 * @dev: DRM device 5248 * @data: ioctl data 5249 * @file_priv: DRM file info 5250 * 5251 * This schedules an asynchronous update on a given CRTC, called page flip. 5252 * Optionally a drm event is generated to signal the completion of the event. 5253 * Generic drivers cannot assume that a pageflip with changed framebuffer 5254 * properties (including driver specific metadata like tiling layout) will work, 5255 * but some drivers support e.g. pixel format changes through the pageflip 5256 * ioctl. 5257 * 5258 * Called by the user via ioctl. 5259 * 5260 * Returns: 5261 * Zero on success, negative errno on failure. 5262 */ 5263 int drm_mode_page_flip_ioctl(struct drm_device *dev, 5264 void *data, struct drm_file *file_priv) 5265 { 5266 struct drm_mode_crtc_page_flip *page_flip = data; 5267 struct drm_crtc *crtc; 5268 struct drm_framebuffer *fb = NULL; 5269 struct drm_pending_vblank_event *e = NULL; 5270 unsigned long flags; 5271 int ret = -EINVAL; 5272 5273 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 5274 page_flip->reserved != 0) 5275 return -EINVAL; 5276 5277 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 5278 return -EINVAL; 5279 5280 crtc = drm_crtc_find(dev, page_flip->crtc_id); 5281 if (!crtc) 5282 return -ENOENT; 5283 5284 drm_modeset_lock_crtc(crtc, crtc->primary); 5285 if (crtc->primary->fb == NULL) { 5286 /* The framebuffer is currently unbound, presumably 5287 * due to a hotplug event, that userspace has not 5288 * yet discovered. 5289 */ 5290 ret = -EBUSY; 5291 goto out; 5292 } 5293 5294 if (crtc->funcs->page_flip == NULL) 5295 goto out; 5296 5297 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 5298 if (!fb) { 5299 ret = -ENOENT; 5300 goto out; 5301 } 5302 5303 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 5304 if (ret) 5305 goto out; 5306 5307 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 5308 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 5309 ret = -EINVAL; 5310 goto out; 5311 } 5312 5313 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5314 ret = -ENOMEM; 5315 spin_lock_irqsave(&dev->event_lock, flags); 5316 if (file_priv->event_space < sizeof(e->event)) { 5317 spin_unlock_irqrestore(&dev->event_lock, flags); 5318 goto out; 5319 } 5320 file_priv->event_space -= sizeof(e->event); 5321 spin_unlock_irqrestore(&dev->event_lock, flags); 5322 5323 e = kzalloc(sizeof(*e), GFP_KERNEL); 5324 if (e == NULL) { 5325 spin_lock_irqsave(&dev->event_lock, flags); 5326 file_priv->event_space += sizeof(e->event); 5327 spin_unlock_irqrestore(&dev->event_lock, flags); 5328 goto out; 5329 } 5330 5331 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 5332 e->event.base.length = sizeof(e->event); 5333 e->event.user_data = page_flip->user_data; 5334 e->base.event = &e->event.base; 5335 e->base.file_priv = file_priv; 5336 e->base.destroy = 5337 (void (*) (struct drm_pending_event *)) kfree; 5338 } 5339 5340 crtc->primary->old_fb = crtc->primary->fb; 5341 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 5342 if (ret) { 5343 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5344 spin_lock_irqsave(&dev->event_lock, flags); 5345 file_priv->event_space += sizeof(e->event); 5346 spin_unlock_irqrestore(&dev->event_lock, flags); 5347 kfree(e); 5348 } 5349 /* Keep the old fb, don't unref it. */ 5350 crtc->primary->old_fb = NULL; 5351 } else { 5352 /* 5353 * Warn if the driver hasn't properly updated the crtc->fb 5354 * field to reflect that the new framebuffer is now used. 5355 * Failing to do so will screw with the reference counting 5356 * on framebuffers. 5357 */ 5358 WARN_ON(crtc->primary->fb != fb); 5359 /* Unref only the old framebuffer. */ 5360 fb = NULL; 5361 } 5362 5363 out: 5364 if (fb) 5365 drm_framebuffer_unreference(fb); 5366 if (crtc->primary->old_fb) 5367 drm_framebuffer_unreference(crtc->primary->old_fb); 5368 crtc->primary->old_fb = NULL; 5369 drm_modeset_unlock_crtc(crtc); 5370 5371 return ret; 5372 } 5373 5374 /** 5375 * drm_mode_config_reset - call ->reset callbacks 5376 * @dev: drm device 5377 * 5378 * This functions calls all the crtc's, encoder's and connector's ->reset 5379 * callback. Drivers can use this in e.g. their driver load or resume code to 5380 * reset hardware and software state. 5381 */ 5382 void drm_mode_config_reset(struct drm_device *dev) 5383 { 5384 struct drm_crtc *crtc; 5385 struct drm_plane *plane; 5386 struct drm_encoder *encoder; 5387 struct drm_connector *connector; 5388 5389 list_for_each_entry(plane, &dev->mode_config.plane_list, head) 5390 if (plane->funcs->reset) 5391 plane->funcs->reset(plane); 5392 5393 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 5394 if (crtc->funcs->reset) 5395 crtc->funcs->reset(crtc); 5396 5397 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 5398 if (encoder->funcs->reset) 5399 encoder->funcs->reset(encoder); 5400 5401 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 5402 if (connector->funcs->reset) 5403 connector->funcs->reset(connector); 5404 } 5405 EXPORT_SYMBOL(drm_mode_config_reset); 5406 5407 /** 5408 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 5409 * @dev: DRM device 5410 * @data: ioctl data 5411 * @file_priv: DRM file info 5412 * 5413 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 5414 * TTM or something else entirely) and returns the resulting buffer handle. This 5415 * handle can then be wrapped up into a framebuffer modeset object. 5416 * 5417 * Note that userspace is not allowed to use such objects for render 5418 * acceleration - drivers must create their own private ioctls for such a use 5419 * case. 5420 * 5421 * Called by the user via ioctl. 5422 * 5423 * Returns: 5424 * Zero on success, negative errno on failure. 5425 */ 5426 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 5427 void *data, struct drm_file *file_priv) 5428 { 5429 struct drm_mode_create_dumb *args = data; 5430 u32 cpp, stride, size; 5431 5432 if (!dev->driver->dumb_create) 5433 return -ENOSYS; 5434 if (!args->width || !args->height || !args->bpp) 5435 return -EINVAL; 5436 5437 /* overflow checks for 32bit size calculations */ 5438 /* NOTE: DIV_ROUND_UP() can overflow */ 5439 cpp = DIV_ROUND_UP(args->bpp, 8); 5440 if (!cpp || cpp > 0xffffffffU / args->width) 5441 return -EINVAL; 5442 stride = cpp * args->width; 5443 if (args->height > 0xffffffffU / stride) 5444 return -EINVAL; 5445 5446 /* test for wrap-around */ 5447 size = args->height * stride; 5448 if (PAGE_ALIGN(size) == 0) 5449 return -EINVAL; 5450 5451 /* 5452 * handle, pitch and size are output parameters. Zero them out to 5453 * prevent drivers from accidentally using uninitialized data. Since 5454 * not all existing userspace is clearing these fields properly we 5455 * cannot reject IOCTL with garbage in them. 5456 */ 5457 args->handle = 0; 5458 args->pitch = 0; 5459 args->size = 0; 5460 5461 return dev->driver->dumb_create(file_priv, dev, args); 5462 } 5463 5464 /** 5465 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 5466 * @dev: DRM device 5467 * @data: ioctl data 5468 * @file_priv: DRM file info 5469 * 5470 * Allocate an offset in the drm device node's address space to be able to 5471 * memory map a dumb buffer. 5472 * 5473 * Called by the user via ioctl. 5474 * 5475 * Returns: 5476 * Zero on success, negative errno on failure. 5477 */ 5478 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 5479 void *data, struct drm_file *file_priv) 5480 { 5481 struct drm_mode_map_dumb *args = data; 5482 5483 /* call driver ioctl to get mmap offset */ 5484 if (!dev->driver->dumb_map_offset) 5485 return -ENOSYS; 5486 5487 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 5488 } 5489 5490 /** 5491 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 5492 * @dev: DRM device 5493 * @data: ioctl data 5494 * @file_priv: DRM file info 5495 * 5496 * This destroys the userspace handle for the given dumb backing storage buffer. 5497 * Since buffer objects must be reference counted in the kernel a buffer object 5498 * won't be immediately freed if a framebuffer modeset object still uses it. 5499 * 5500 * Called by the user via ioctl. 5501 * 5502 * Returns: 5503 * Zero on success, negative errno on failure. 5504 */ 5505 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 5506 void *data, struct drm_file *file_priv) 5507 { 5508 struct drm_mode_destroy_dumb *args = data; 5509 5510 if (!dev->driver->dumb_destroy) 5511 return -ENOSYS; 5512 5513 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 5514 } 5515 5516 /** 5517 * drm_fb_get_bpp_depth - get the bpp/depth values for format 5518 * @format: pixel format (DRM_FORMAT_*) 5519 * @depth: storage for the depth value 5520 * @bpp: storage for the bpp value 5521 * 5522 * This only supports RGB formats here for compat with code that doesn't use 5523 * pixel formats directly yet. 5524 */ 5525 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 5526 int *bpp) 5527 { 5528 switch (format) { 5529 case DRM_FORMAT_C8: 5530 case DRM_FORMAT_RGB332: 5531 case DRM_FORMAT_BGR233: 5532 *depth = 8; 5533 *bpp = 8; 5534 break; 5535 case DRM_FORMAT_XRGB1555: 5536 case DRM_FORMAT_XBGR1555: 5537 case DRM_FORMAT_RGBX5551: 5538 case DRM_FORMAT_BGRX5551: 5539 case DRM_FORMAT_ARGB1555: 5540 case DRM_FORMAT_ABGR1555: 5541 case DRM_FORMAT_RGBA5551: 5542 case DRM_FORMAT_BGRA5551: 5543 *depth = 15; 5544 *bpp = 16; 5545 break; 5546 case DRM_FORMAT_RGB565: 5547 case DRM_FORMAT_BGR565: 5548 *depth = 16; 5549 *bpp = 16; 5550 break; 5551 case DRM_FORMAT_RGB888: 5552 case DRM_FORMAT_BGR888: 5553 *depth = 24; 5554 *bpp = 24; 5555 break; 5556 case DRM_FORMAT_XRGB8888: 5557 case DRM_FORMAT_XBGR8888: 5558 case DRM_FORMAT_RGBX8888: 5559 case DRM_FORMAT_BGRX8888: 5560 *depth = 24; 5561 *bpp = 32; 5562 break; 5563 case DRM_FORMAT_XRGB2101010: 5564 case DRM_FORMAT_XBGR2101010: 5565 case DRM_FORMAT_RGBX1010102: 5566 case DRM_FORMAT_BGRX1010102: 5567 case DRM_FORMAT_ARGB2101010: 5568 case DRM_FORMAT_ABGR2101010: 5569 case DRM_FORMAT_RGBA1010102: 5570 case DRM_FORMAT_BGRA1010102: 5571 *depth = 30; 5572 *bpp = 32; 5573 break; 5574 case DRM_FORMAT_ARGB8888: 5575 case DRM_FORMAT_ABGR8888: 5576 case DRM_FORMAT_RGBA8888: 5577 case DRM_FORMAT_BGRA8888: 5578 *depth = 32; 5579 *bpp = 32; 5580 break; 5581 default: 5582 DRM_DEBUG_KMS("unsupported pixel format %s\n", 5583 drm_get_format_name(format)); 5584 *depth = 0; 5585 *bpp = 0; 5586 break; 5587 } 5588 } 5589 EXPORT_SYMBOL(drm_fb_get_bpp_depth); 5590 5591 /** 5592 * drm_format_num_planes - get the number of planes for format 5593 * @format: pixel format (DRM_FORMAT_*) 5594 * 5595 * Returns: 5596 * The number of planes used by the specified pixel format. 5597 */ 5598 int drm_format_num_planes(uint32_t format) 5599 { 5600 switch (format) { 5601 case DRM_FORMAT_YUV410: 5602 case DRM_FORMAT_YVU410: 5603 case DRM_FORMAT_YUV411: 5604 case DRM_FORMAT_YVU411: 5605 case DRM_FORMAT_YUV420: 5606 case DRM_FORMAT_YVU420: 5607 case DRM_FORMAT_YUV422: 5608 case DRM_FORMAT_YVU422: 5609 case DRM_FORMAT_YUV444: 5610 case DRM_FORMAT_YVU444: 5611 return 3; 5612 case DRM_FORMAT_NV12: 5613 case DRM_FORMAT_NV21: 5614 case DRM_FORMAT_NV16: 5615 case DRM_FORMAT_NV61: 5616 case DRM_FORMAT_NV24: 5617 case DRM_FORMAT_NV42: 5618 return 2; 5619 default: 5620 return 1; 5621 } 5622 } 5623 EXPORT_SYMBOL(drm_format_num_planes); 5624 5625 /** 5626 * drm_format_plane_cpp - determine the bytes per pixel value 5627 * @format: pixel format (DRM_FORMAT_*) 5628 * @plane: plane index 5629 * 5630 * Returns: 5631 * The bytes per pixel value for the specified plane. 5632 */ 5633 int drm_format_plane_cpp(uint32_t format, int plane) 5634 { 5635 unsigned int depth; 5636 int bpp; 5637 5638 if (plane >= drm_format_num_planes(format)) 5639 return 0; 5640 5641 switch (format) { 5642 case DRM_FORMAT_YUYV: 5643 case DRM_FORMAT_YVYU: 5644 case DRM_FORMAT_UYVY: 5645 case DRM_FORMAT_VYUY: 5646 return 2; 5647 case DRM_FORMAT_NV12: 5648 case DRM_FORMAT_NV21: 5649 case DRM_FORMAT_NV16: 5650 case DRM_FORMAT_NV61: 5651 case DRM_FORMAT_NV24: 5652 case DRM_FORMAT_NV42: 5653 return plane ? 2 : 1; 5654 case DRM_FORMAT_YUV410: 5655 case DRM_FORMAT_YVU410: 5656 case DRM_FORMAT_YUV411: 5657 case DRM_FORMAT_YVU411: 5658 case DRM_FORMAT_YUV420: 5659 case DRM_FORMAT_YVU420: 5660 case DRM_FORMAT_YUV422: 5661 case DRM_FORMAT_YVU422: 5662 case DRM_FORMAT_YUV444: 5663 case DRM_FORMAT_YVU444: 5664 return 1; 5665 default: 5666 drm_fb_get_bpp_depth(format, &depth, &bpp); 5667 return bpp >> 3; 5668 } 5669 } 5670 EXPORT_SYMBOL(drm_format_plane_cpp); 5671 5672 /** 5673 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 5674 * @format: pixel format (DRM_FORMAT_*) 5675 * 5676 * Returns: 5677 * The horizontal chroma subsampling factor for the 5678 * specified pixel format. 5679 */ 5680 int drm_format_horz_chroma_subsampling(uint32_t format) 5681 { 5682 switch (format) { 5683 case DRM_FORMAT_YUV411: 5684 case DRM_FORMAT_YVU411: 5685 case DRM_FORMAT_YUV410: 5686 case DRM_FORMAT_YVU410: 5687 return 4; 5688 case DRM_FORMAT_YUYV: 5689 case DRM_FORMAT_YVYU: 5690 case DRM_FORMAT_UYVY: 5691 case DRM_FORMAT_VYUY: 5692 case DRM_FORMAT_NV12: 5693 case DRM_FORMAT_NV21: 5694 case DRM_FORMAT_NV16: 5695 case DRM_FORMAT_NV61: 5696 case DRM_FORMAT_YUV422: 5697 case DRM_FORMAT_YVU422: 5698 case DRM_FORMAT_YUV420: 5699 case DRM_FORMAT_YVU420: 5700 return 2; 5701 default: 5702 return 1; 5703 } 5704 } 5705 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5706 5707 /** 5708 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5709 * @format: pixel format (DRM_FORMAT_*) 5710 * 5711 * Returns: 5712 * The vertical chroma subsampling factor for the 5713 * specified pixel format. 5714 */ 5715 int drm_format_vert_chroma_subsampling(uint32_t format) 5716 { 5717 switch (format) { 5718 case DRM_FORMAT_YUV410: 5719 case DRM_FORMAT_YVU410: 5720 return 4; 5721 case DRM_FORMAT_YUV420: 5722 case DRM_FORMAT_YVU420: 5723 case DRM_FORMAT_NV12: 5724 case DRM_FORMAT_NV21: 5725 return 2; 5726 default: 5727 return 1; 5728 } 5729 } 5730 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5731 5732 /** 5733 * drm_rotation_simplify() - Try to simplify the rotation 5734 * @rotation: Rotation to be simplified 5735 * @supported_rotations: Supported rotations 5736 * 5737 * Attempt to simplify the rotation to a form that is supported. 5738 * Eg. if the hardware supports everything except DRM_REFLECT_X 5739 * one could call this function like this: 5740 * 5741 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5742 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5743 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5744 * 5745 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5746 * transforms the hardware supports, this function may not 5747 * be able to produce a supported transform, so the caller should 5748 * check the result afterwards. 5749 */ 5750 unsigned int drm_rotation_simplify(unsigned int rotation, 5751 unsigned int supported_rotations) 5752 { 5753 if (rotation & ~supported_rotations) { 5754 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5755 rotation = (rotation & ~0xf) | BIT((ffs(rotation & 0xf) + 1) % 4); 5756 } 5757 5758 return rotation; 5759 } 5760 EXPORT_SYMBOL(drm_rotation_simplify); 5761 5762 /** 5763 * drm_mode_config_init - initialize DRM mode_configuration structure 5764 * @dev: DRM device 5765 * 5766 * Initialize @dev's mode_config structure, used for tracking the graphics 5767 * configuration of @dev. 5768 * 5769 * Since this initializes the modeset locks, no locking is possible. Which is no 5770 * problem, since this should happen single threaded at init time. It is the 5771 * driver's problem to ensure this guarantee. 5772 * 5773 */ 5774 void drm_mode_config_init(struct drm_device *dev) 5775 { 5776 mutex_init(&dev->mode_config.mutex); 5777 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5778 mutex_init(&dev->mode_config.idr_mutex); 5779 mutex_init(&dev->mode_config.fb_lock); 5780 mutex_init(&dev->mode_config.blob_lock); 5781 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5782 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5783 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5784 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5785 INIT_LIST_HEAD(&dev->mode_config.property_list); 5786 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5787 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5788 idr_init(&dev->mode_config.crtc_idr); 5789 idr_init(&dev->mode_config.tile_idr); 5790 5791 drm_modeset_lock_all(dev); 5792 drm_mode_create_standard_properties(dev); 5793 drm_modeset_unlock_all(dev); 5794 5795 /* Just to be sure */ 5796 dev->mode_config.num_fb = 0; 5797 dev->mode_config.num_connector = 0; 5798 dev->mode_config.num_crtc = 0; 5799 dev->mode_config.num_encoder = 0; 5800 dev->mode_config.num_overlay_plane = 0; 5801 dev->mode_config.num_total_plane = 0; 5802 } 5803 EXPORT_SYMBOL(drm_mode_config_init); 5804 5805 /** 5806 * drm_mode_config_cleanup - free up DRM mode_config info 5807 * @dev: DRM device 5808 * 5809 * Free up all the connectors and CRTCs associated with this DRM device, then 5810 * free up the framebuffers and associated buffer objects. 5811 * 5812 * Note that since this /should/ happen single-threaded at driver/device 5813 * teardown time, no locking is required. It's the driver's job to ensure that 5814 * this guarantee actually holds true. 5815 * 5816 * FIXME: cleanup any dangling user buffer objects too 5817 */ 5818 void drm_mode_config_cleanup(struct drm_device *dev) 5819 { 5820 struct drm_connector *connector, *ot; 5821 struct drm_crtc *crtc, *ct; 5822 struct drm_encoder *encoder, *enct; 5823 struct drm_framebuffer *fb, *fbt; 5824 struct drm_property *property, *pt; 5825 struct drm_property_blob *blob, *bt; 5826 struct drm_plane *plane, *plt; 5827 5828 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5829 head) { 5830 encoder->funcs->destroy(encoder); 5831 } 5832 5833 list_for_each_entry_safe(connector, ot, 5834 &dev->mode_config.connector_list, head) { 5835 connector->funcs->destroy(connector); 5836 } 5837 5838 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5839 head) { 5840 drm_property_destroy(dev, property); 5841 } 5842 5843 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5844 head_global) { 5845 drm_property_unreference_blob(blob); 5846 } 5847 5848 /* 5849 * Single-threaded teardown context, so it's not required to grab the 5850 * fb_lock to protect against concurrent fb_list access. Contrary, it 5851 * would actually deadlock with the drm_framebuffer_cleanup function. 5852 * 5853 * Also, if there are any framebuffers left, that's a driver leak now, 5854 * so politely WARN about this. 5855 */ 5856 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5857 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5858 drm_framebuffer_remove(fb); 5859 } 5860 5861 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5862 head) { 5863 plane->funcs->destroy(plane); 5864 } 5865 5866 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5867 crtc->funcs->destroy(crtc); 5868 } 5869 5870 idr_destroy(&dev->mode_config.tile_idr); 5871 idr_destroy(&dev->mode_config.crtc_idr); 5872 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5873 } 5874 EXPORT_SYMBOL(drm_mode_config_cleanup); 5875 5876 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5877 unsigned int supported_rotations) 5878 { 5879 static const struct drm_prop_enum_list props[] = { 5880 { DRM_ROTATE_0, "rotate-0" }, 5881 { DRM_ROTATE_90, "rotate-90" }, 5882 { DRM_ROTATE_180, "rotate-180" }, 5883 { DRM_ROTATE_270, "rotate-270" }, 5884 { DRM_REFLECT_X, "reflect-x" }, 5885 { DRM_REFLECT_Y, "reflect-y" }, 5886 }; 5887 5888 return drm_property_create_bitmask(dev, 0, "rotation", 5889 props, ARRAY_SIZE(props), 5890 supported_rotations); 5891 } 5892 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5893 5894 /** 5895 * DOC: Tile group 5896 * 5897 * Tile groups are used to represent tiled monitors with a unique 5898 * integer identifier. Tiled monitors using DisplayID v1.3 have 5899 * a unique 8-byte handle, we store this in a tile group, so we 5900 * have a common identifier for all tiles in a monitor group. 5901 */ 5902 static void drm_tile_group_free(struct kref *kref) 5903 { 5904 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5905 struct drm_device *dev = tg->dev; 5906 mutex_lock(&dev->mode_config.idr_mutex); 5907 idr_remove(&dev->mode_config.tile_idr, tg->id); 5908 mutex_unlock(&dev->mode_config.idr_mutex); 5909 kfree(tg); 5910 } 5911 5912 /** 5913 * drm_mode_put_tile_group - drop a reference to a tile group. 5914 * @dev: DRM device 5915 * @tg: tile group to drop reference to. 5916 * 5917 * drop reference to tile group and free if 0. 5918 */ 5919 void drm_mode_put_tile_group(struct drm_device *dev, 5920 struct drm_tile_group *tg) 5921 { 5922 kref_put(&tg->refcount, drm_tile_group_free); 5923 } 5924 5925 /** 5926 * drm_mode_get_tile_group - get a reference to an existing tile group 5927 * @dev: DRM device 5928 * @topology: 8-bytes unique per monitor. 5929 * 5930 * Use the unique bytes to get a reference to an existing tile group. 5931 * 5932 * RETURNS: 5933 * tile group or NULL if not found. 5934 */ 5935 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 5936 char topology[8]) 5937 { 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 return NULL; 5951 } 5952 EXPORT_SYMBOL(drm_mode_get_tile_group); 5953 5954 /** 5955 * drm_mode_create_tile_group - create a tile group from a displayid description 5956 * @dev: DRM device 5957 * @topology: 8-bytes unique per monitor. 5958 * 5959 * Create a tile group for the unique monitor, and get a unique 5960 * identifier for the tile group. 5961 * 5962 * RETURNS: 5963 * new tile group or error. 5964 */ 5965 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 5966 char topology[8]) 5967 { 5968 struct drm_tile_group *tg; 5969 int ret; 5970 5971 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 5972 if (!tg) 5973 return ERR_PTR(-ENOMEM); 5974 5975 kref_init(&tg->refcount); 5976 memcpy(tg->group_data, topology, 8); 5977 tg->dev = dev; 5978 5979 mutex_lock(&dev->mode_config.idr_mutex); 5980 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 5981 if (ret >= 0) { 5982 tg->id = ret; 5983 } else { 5984 kfree(tg); 5985 tg = ERR_PTR(ret); 5986 } 5987 5988 mutex_unlock(&dev->mode_config.idr_mutex); 5989 return tg; 5990 } 5991 EXPORT_SYMBOL(drm_mode_create_tile_group); 5992