1 /* 2 * Copyright (c) 2006-2008 Intel Corporation 3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 4 * Copyright (c) 2008 Red Hat Inc. 5 * 6 * DRM core CRTC related functions 7 * 8 * Permission to use, copy, modify, distribute, and sell this software and its 9 * documentation for any purpose is hereby granted without fee, provided that 10 * the above copyright notice appear in all copies and that both that copyright 11 * notice and this permission notice appear in supporting documentation, and 12 * that the name of the copyright holders not be used in advertising or 13 * publicity pertaining to distribution of the software without specific, 14 * written prior permission. The copyright holders make no representations 15 * about the suitability of this software for any purpose. It is provided "as 16 * is" without express or implied warranty. 17 * 18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 24 * OF THIS SOFTWARE. 25 * 26 * Authors: 27 * Keith Packard 28 * Eric Anholt <eric@anholt.net> 29 * Dave Airlie <airlied@linux.ie> 30 * Jesse Barnes <jesse.barnes@intel.com> 31 */ 32 #include <linux/ctype.h> 33 #include <linux/list.h> 34 #include <linux/export.h> 35 #include <drm/drmP.h> 36 #include <drm/drm_crtc.h> 37 #include <drm/drm_edid.h> 38 #include <uapi_drm/drm_fourcc.h> 39 #include <linux/slab.h> 40 #include <drm/drm_modeset_lock.h> 41 #include <drm/drm_atomic.h> 42 43 #include "drm_crtc_internal.h" 44 #include "drm_internal.h" 45 46 static struct drm_framebuffer * 47 internal_framebuffer_create(struct drm_device *dev, 48 const 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 int count; 149 }; 150 151 /* 152 * Connector and encoder types. 153 */ 154 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { 155 { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, 156 { DRM_MODE_CONNECTOR_VGA, "VGA" }, 157 { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, 158 { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, 159 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, 160 { DRM_MODE_CONNECTOR_Composite, "Composite" }, 161 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, 162 { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, 163 { DRM_MODE_CONNECTOR_Component, "Component" }, 164 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, 165 { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, 166 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, 167 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, 168 { DRM_MODE_CONNECTOR_TV, "TV" }, 169 { DRM_MODE_CONNECTOR_eDP, "eDP" }, 170 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, 171 { DRM_MODE_CONNECTOR_DSI, "DSI" }, 172 }; 173 174 static const struct drm_prop_enum_list drm_encoder_enum_list[] = { 175 { DRM_MODE_ENCODER_NONE, "None" }, 176 { DRM_MODE_ENCODER_DAC, "DAC" }, 177 { DRM_MODE_ENCODER_TMDS, "TMDS" }, 178 { DRM_MODE_ENCODER_LVDS, "LVDS" }, 179 { DRM_MODE_ENCODER_TVDAC, "TV" }, 180 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" }, 181 { DRM_MODE_ENCODER_DSI, "DSI" }, 182 { DRM_MODE_ENCODER_DPMST, "DP MST" }, 183 }; 184 185 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { 186 { SubPixelUnknown, "Unknown" }, 187 { SubPixelHorizontalRGB, "Horizontal RGB" }, 188 { SubPixelHorizontalBGR, "Horizontal BGR" }, 189 { SubPixelVerticalRGB, "Vertical RGB" }, 190 { SubPixelVerticalBGR, "Vertical BGR" }, 191 { SubPixelNone, "None" }, 192 }; 193 194 void drm_connector_ida_init(void) 195 { 196 int i; 197 198 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 199 ida_init(&drm_connector_enum_list[i].ida); 200 } 201 202 void drm_connector_ida_destroy(void) 203 { 204 int i; 205 206 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 207 ida_destroy(&drm_connector_enum_list[i].ida); 208 } 209 210 /** 211 * drm_get_connector_status_name - return a string for connector status 212 * @status: connector status to compute name of 213 * 214 * In contrast to the other drm_get_*_name functions this one here returns a 215 * const pointer and hence is threadsafe. 216 */ 217 const char *drm_get_connector_status_name(enum drm_connector_status status) 218 { 219 if (status == connector_status_connected) 220 return "connected"; 221 else if (status == connector_status_disconnected) 222 return "disconnected"; 223 else 224 return "unknown"; 225 } 226 EXPORT_SYMBOL(drm_get_connector_status_name); 227 228 /** 229 * drm_get_subpixel_order_name - return a string for a given subpixel enum 230 * @order: enum of subpixel_order 231 * 232 * Note you could abuse this and return something out of bounds, but that 233 * would be a caller error. No unscrubbed user data should make it here. 234 */ 235 const char *drm_get_subpixel_order_name(enum subpixel_order order) 236 { 237 return drm_subpixel_enum_list[order].name; 238 } 239 EXPORT_SYMBOL(drm_get_subpixel_order_name); 240 241 static char printable_char(int c) 242 { 243 return isascii(c) && isprint(c) ? c : '?'; 244 } 245 246 /** 247 * drm_get_format_name - return a string for drm fourcc format 248 * @format: format to compute name of 249 * 250 * Note that the buffer used by this function is globally shared and owned by 251 * the function itself. 252 * 253 * FIXME: This isn't really multithreading safe. 254 */ 255 const char *drm_get_format_name(uint32_t format) 256 { 257 static char buf[32]; 258 259 ksnprintf(buf, sizeof(buf), 260 "%c%c%c%c %s-endian (0x%08x)", 261 printable_char(format & 0xff), 262 printable_char((format >> 8) & 0xff), 263 printable_char((format >> 16) & 0xff), 264 printable_char((format >> 24) & 0x7f), 265 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", 266 format); 267 268 return buf; 269 } 270 EXPORT_SYMBOL(drm_get_format_name); 271 272 /* 273 * Internal function to assign a slot in the object idr and optionally 274 * register the object into the idr. 275 */ 276 static int drm_mode_object_get_reg(struct drm_device *dev, 277 struct drm_mode_object *obj, 278 uint32_t obj_type, 279 bool register_obj) 280 { 281 int ret; 282 283 mutex_lock(&dev->mode_config.idr_mutex); 284 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); 285 if (ret >= 0) { 286 /* 287 * Set up the object linking under the protection of the idr 288 * lock so that other users can't see inconsistent state. 289 */ 290 obj->id = ret; 291 obj->type = obj_type; 292 } 293 mutex_unlock(&dev->mode_config.idr_mutex); 294 295 return ret < 0 ? ret : 0; 296 } 297 298 /** 299 * drm_mode_object_get - allocate a new modeset identifier 300 * @dev: DRM device 301 * @obj: object pointer, used to generate unique ID 302 * @obj_type: object type 303 * 304 * Create a unique identifier based on @ptr in @dev's identifier space. Used 305 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix 306 * modeset identifiers are _not_ reference counted. Hence don't use this for 307 * reference counted modeset objects like framebuffers. 308 * 309 * Returns: 310 * Zero on success, error code on failure. 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 ret; 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 drm_mode_object_put(dev, &fb->base); 435 436 fb->base.id = 0; 437 } 438 439 static void drm_framebuffer_free(struct kref *kref) 440 { 441 struct drm_framebuffer *fb = 442 container_of(kref, struct drm_framebuffer, refcount); 443 struct drm_device *dev = fb->dev; 444 445 /* 446 * The lookup idr holds a weak reference, which has not necessarily been 447 * removed at this point. Check for that. 448 */ 449 mutex_lock(&dev->mode_config.fb_lock); 450 if (fb->base.id) { 451 /* Mark fb as reaped and drop idr ref. */ 452 __drm_framebuffer_unregister(dev, fb); 453 } 454 mutex_unlock(&dev->mode_config.fb_lock); 455 456 fb->funcs->destroy(fb); 457 } 458 459 static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev, 460 uint32_t id) 461 { 462 struct drm_mode_object *obj = NULL; 463 struct drm_framebuffer *fb; 464 465 mutex_lock(&dev->mode_config.idr_mutex); 466 obj = idr_find(&dev->mode_config.crtc_idr, id); 467 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id)) 468 fb = NULL; 469 else 470 fb = obj_to_fb(obj); 471 mutex_unlock(&dev->mode_config.idr_mutex); 472 473 return fb; 474 } 475 476 /** 477 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference 478 * @dev: drm device 479 * @id: id of the fb object 480 * 481 * If successful, this grabs an additional reference to the framebuffer - 482 * callers need to make sure to eventually unreference the returned framebuffer 483 * again, using @drm_framebuffer_unreference. 484 */ 485 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, 486 uint32_t id) 487 { 488 struct drm_framebuffer *fb; 489 490 mutex_lock(&dev->mode_config.fb_lock); 491 fb = __drm_framebuffer_lookup(dev, id); 492 if (fb) { 493 if (!kref_get_unless_zero(&fb->refcount)) 494 fb = NULL; 495 } 496 mutex_unlock(&dev->mode_config.fb_lock); 497 498 return fb; 499 } 500 EXPORT_SYMBOL(drm_framebuffer_lookup); 501 502 /** 503 * drm_framebuffer_unreference - unref a framebuffer 504 * @fb: framebuffer to unref 505 * 506 * This functions decrements the fb's refcount and frees it if it drops to zero. 507 */ 508 void drm_framebuffer_unreference(struct drm_framebuffer *fb) 509 { 510 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 511 kref_put(&fb->refcount, drm_framebuffer_free); 512 } 513 EXPORT_SYMBOL(drm_framebuffer_unreference); 514 515 /** 516 * drm_framebuffer_reference - incr the fb refcnt 517 * @fb: framebuffer 518 * 519 * This functions increments the fb's refcount. 520 */ 521 void drm_framebuffer_reference(struct drm_framebuffer *fb) 522 { 523 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 524 kref_get(&fb->refcount); 525 } 526 EXPORT_SYMBOL(drm_framebuffer_reference); 527 528 /** 529 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr 530 * @fb: fb to unregister 531 * 532 * Drivers need to call this when cleaning up driver-private framebuffers, e.g. 533 * those used for fbdev. Note that the caller must hold a reference of it's own, 534 * i.e. the object may not be destroyed through this call (since it'll lead to a 535 * locking inversion). 536 */ 537 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) 538 { 539 struct drm_device *dev; 540 541 if (!fb) 542 return; 543 544 dev = fb->dev; 545 546 mutex_lock(&dev->mode_config.fb_lock); 547 /* Mark fb as reaped and drop idr ref. */ 548 __drm_framebuffer_unregister(dev, fb); 549 mutex_unlock(&dev->mode_config.fb_lock); 550 } 551 EXPORT_SYMBOL(drm_framebuffer_unregister_private); 552 553 /** 554 * drm_framebuffer_cleanup - remove a framebuffer object 555 * @fb: framebuffer to remove 556 * 557 * Cleanup framebuffer. This function is intended to be used from the drivers 558 * ->destroy callback. It can also be used to clean up driver private 559 * framebuffers embedded into a larger structure. 560 * 561 * Note that this function does not remove the fb from active usuage - if it is 562 * still used anywhere, hilarity can ensue since userspace could call getfb on 563 * the id and get back -EINVAL. Obviously no concern at driver unload time. 564 * 565 * Also, the framebuffer will not be removed from the lookup idr - for 566 * user-created framebuffers this will happen in in the rmfb ioctl. For 567 * driver-private objects (e.g. for fbdev) drivers need to explicitly call 568 * drm_framebuffer_unregister_private. 569 */ 570 void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 571 { 572 struct drm_device *dev = fb->dev; 573 574 mutex_lock(&dev->mode_config.fb_lock); 575 list_del(&fb->head); 576 dev->mode_config.num_fb--; 577 mutex_unlock(&dev->mode_config.fb_lock); 578 } 579 EXPORT_SYMBOL(drm_framebuffer_cleanup); 580 581 /** 582 * drm_framebuffer_remove - remove and unreference a framebuffer object 583 * @fb: framebuffer to remove 584 * 585 * Scans all the CRTCs and planes in @dev's mode_config. If they're 586 * using @fb, removes it, setting it to NULL. Then drops the reference to the 587 * passed-in framebuffer. Might take the modeset locks. 588 * 589 * Note that this function optimizes the cleanup away if the caller holds the 590 * last reference to the framebuffer. It is also guaranteed to not take the 591 * modeset locks in this case. 592 */ 593 void drm_framebuffer_remove(struct drm_framebuffer *fb) 594 { 595 struct drm_device *dev; 596 struct drm_crtc *crtc; 597 struct drm_plane *plane; 598 struct drm_mode_set set; 599 int ret; 600 601 if (!fb) 602 return; 603 604 dev = fb->dev; 605 606 WARN_ON(!list_empty(&fb->filp_head)); 607 608 /* 609 * drm ABI mandates that we remove any deleted framebuffers from active 610 * useage. But since most sane clients only remove framebuffers they no 611 * longer need, try to optimize this away. 612 * 613 * Since we're holding a reference ourselves, observing a refcount of 1 614 * means that we're the last holder and can skip it. Also, the refcount 615 * can never increase from 1 again, so we don't need any barriers or 616 * locks. 617 * 618 * Note that userspace could try to race with use and instate a new 619 * usage _after_ we've cleared all current ones. End result will be an 620 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot 621 * in this manner. 622 */ 623 if (atomic_read(&fb->refcount.refcount) > 1) { 624 drm_modeset_lock_all(dev); 625 /* remove from any CRTC */ 626 drm_for_each_crtc(crtc, dev) { 627 if (crtc->primary->fb == fb) { 628 /* should turn off the crtc */ 629 memset(&set, 0, sizeof(struct drm_mode_set)); 630 set.crtc = crtc; 631 set.fb = NULL; 632 ret = drm_mode_set_config_internal(&set); 633 if (ret) 634 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); 635 } 636 } 637 638 drm_for_each_plane(plane, dev) { 639 if (plane->fb == fb) 640 drm_plane_force_disable(plane); 641 } 642 drm_modeset_unlock_all(dev); 643 } 644 645 drm_framebuffer_unreference(fb); 646 } 647 EXPORT_SYMBOL(drm_framebuffer_remove); 648 649 DEFINE_WW_CLASS(crtc_ww_class); 650 651 static unsigned int drm_num_crtcs(struct drm_device *dev) 652 { 653 unsigned int num = 0; 654 struct drm_crtc *tmp; 655 656 drm_for_each_crtc(tmp, dev) { 657 num++; 658 } 659 660 return num; 661 } 662 663 /** 664 * drm_crtc_init_with_planes - Initialise a new CRTC object with 665 * specified primary and cursor planes. 666 * @dev: DRM device 667 * @crtc: CRTC object to init 668 * @primary: Primary plane for CRTC 669 * @cursor: Cursor plane for CRTC 670 * @funcs: callbacks for the new CRTC 671 * @name: printf style format string for the CRTC name, or NULL for default name 672 * 673 * Inits a new object created as base part of a driver crtc object. 674 * 675 * Returns: 676 * Zero on success, error code on failure. 677 */ 678 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 679 struct drm_plane *primary, 680 struct drm_plane *cursor, 681 const struct drm_crtc_funcs *funcs, 682 const char *name, ...) 683 { 684 struct drm_mode_config *config = &dev->mode_config; 685 int ret; 686 687 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); 688 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); 689 690 crtc->dev = dev; 691 crtc->funcs = funcs; 692 693 drm_modeset_lock_init(&crtc->mutex); 694 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 695 if (ret) 696 return ret; 697 698 if (name) { 699 __va_list ap; 700 701 __va_start(ap, name); 702 crtc->name = kvasprintf(GFP_KERNEL, name, ap); 703 __va_end(ap); 704 } else { 705 crtc->name = kasprintf(GFP_KERNEL, "crtc-%d", 706 drm_num_crtcs(dev)); 707 } 708 if (!crtc->name) { 709 drm_mode_object_put(dev, &crtc->base); 710 return -ENOMEM; 711 } 712 713 crtc->base.properties = &crtc->properties; 714 715 list_add_tail(&crtc->head, &config->crtc_list); 716 config->num_crtc++; 717 718 crtc->primary = primary; 719 crtc->cursor = cursor; 720 if (primary) 721 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 722 if (cursor) 723 cursor->possible_crtcs = 1 << drm_crtc_index(crtc); 724 725 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 726 drm_object_attach_property(&crtc->base, config->prop_active, 0); 727 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); 728 } 729 730 return 0; 731 } 732 EXPORT_SYMBOL(drm_crtc_init_with_planes); 733 734 /** 735 * drm_crtc_cleanup - Clean up the core crtc usage 736 * @crtc: CRTC to cleanup 737 * 738 * This function cleans up @crtc and removes it from the DRM mode setting 739 * core. Note that the function does *not* free the crtc structure itself, 740 * this is the responsibility of the caller. 741 */ 742 void drm_crtc_cleanup(struct drm_crtc *crtc) 743 { 744 struct drm_device *dev = crtc->dev; 745 746 kfree(crtc->gamma_store); 747 crtc->gamma_store = NULL; 748 749 drm_modeset_lock_fini(&crtc->mutex); 750 751 drm_mode_object_put(dev, &crtc->base); 752 list_del(&crtc->head); 753 dev->mode_config.num_crtc--; 754 755 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); 756 if (crtc->state && crtc->funcs->atomic_destroy_state) 757 crtc->funcs->atomic_destroy_state(crtc, crtc->state); 758 759 kfree(crtc->name); 760 761 memset(crtc, 0, sizeof(*crtc)); 762 } 763 EXPORT_SYMBOL(drm_crtc_cleanup); 764 765 /** 766 * drm_crtc_index - find the index of a registered CRTC 767 * @crtc: CRTC to find index for 768 * 769 * Given a registered CRTC, return the index of that CRTC within a DRM 770 * device's list of CRTCs. 771 */ 772 unsigned int drm_crtc_index(struct drm_crtc *crtc) 773 { 774 unsigned int index = 0; 775 struct drm_crtc *tmp; 776 777 drm_for_each_crtc(tmp, crtc->dev) { 778 if (tmp == crtc) 779 return index; 780 781 index++; 782 } 783 784 BUG(); 785 } 786 EXPORT_SYMBOL(drm_crtc_index); 787 788 /* 789 * drm_mode_remove - remove and free a mode 790 * @connector: connector list to modify 791 * @mode: mode to remove 792 * 793 * Remove @mode from @connector's mode list, then free it. 794 */ 795 static void drm_mode_remove(struct drm_connector *connector, 796 struct drm_display_mode *mode) 797 { 798 list_del(&mode->head); 799 drm_mode_destroy(connector->dev, mode); 800 } 801 802 /** 803 * drm_display_info_set_bus_formats - set the supported bus formats 804 * @info: display info to store bus formats in 805 * @formats: array containing the supported bus formats 806 * @num_formats: the number of entries in the fmts array 807 * 808 * Store the supported bus formats in display info structure. 809 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for 810 * a full list of available formats. 811 */ 812 int drm_display_info_set_bus_formats(struct drm_display_info *info, 813 const u32 *formats, 814 unsigned int num_formats) 815 { 816 u32 *fmts = NULL; 817 818 if (!formats && num_formats) 819 return -EINVAL; 820 821 if (formats && num_formats) { 822 fmts = kmemdup(formats, sizeof(*formats) * num_formats, 823 GFP_KERNEL); 824 if (!fmts) 825 return -ENOMEM; 826 } 827 828 kfree(info->bus_formats); 829 info->bus_formats = fmts; 830 info->num_bus_formats = num_formats; 831 832 return 0; 833 } 834 EXPORT_SYMBOL(drm_display_info_set_bus_formats); 835 836 /** 837 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 838 * @connector: connector to quwery 839 * 840 * The kernel supports per-connector configration of its consoles through 841 * use of the video= parameter. This function parses that option and 842 * extracts the user's specified mode (or enable/disable status) for a 843 * particular connector. This is typically only used during the early fbdev 844 * setup. 845 */ 846 static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 847 { 848 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 849 char *option = NULL; 850 851 if (fb_get_options(connector->name, &option)) 852 return; 853 854 if (!drm_mode_parse_command_line_for_connector(option, 855 connector, 856 mode)) 857 return; 858 859 if (mode->force) { 860 const char *s; 861 862 switch (mode->force) { 863 case DRM_FORCE_OFF: 864 s = "OFF"; 865 break; 866 case DRM_FORCE_ON_DIGITAL: 867 s = "ON - dig"; 868 break; 869 default: 870 case DRM_FORCE_ON: 871 s = "ON"; 872 break; 873 } 874 875 DRM_INFO("forcing %s connector %s\n", connector->name, s); 876 connector->force = mode->force; 877 } 878 879 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 880 connector->name, 881 mode->xres, mode->yres, 882 mode->refresh_specified ? mode->refresh : 60, 883 mode->rb ? " reduced blanking" : "", 884 mode->margins ? " with margins" : "", 885 mode->interlace ? " interlaced" : ""); 886 } 887 888 /** 889 * drm_connector_init - Init a preallocated connector 890 * @dev: DRM device 891 * @connector: the connector to init 892 * @funcs: callbacks for this connector 893 * @connector_type: user visible type of the connector 894 * 895 * Initialises a preallocated connector. Connectors should be 896 * subclassed as part of driver connector objects. 897 * 898 * Returns: 899 * Zero on success, error code on failure. 900 */ 901 int drm_connector_init(struct drm_device *dev, 902 struct drm_connector *connector, 903 const struct drm_connector_funcs *funcs, 904 int connector_type) 905 { 906 struct drm_mode_config *config = &dev->mode_config; 907 int ret; 908 909 drm_modeset_lock_all(dev); 910 911 ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, true); 912 if (ret) 913 goto out_unlock; 914 915 connector->base.properties = &connector->properties; 916 connector->dev = dev; 917 connector->funcs = funcs; 918 connector->connector_type = connector_type; 919 connector->connector_type_id = 920 ++drm_connector_enum_list[connector_type].count; /* TODO */ 921 if (connector->connector_type_id < 0) { 922 ret = connector->connector_type_id; 923 goto out_put; 924 } 925 connector->name = 926 kasprintf(GFP_KERNEL, "%s-%d", 927 drm_connector_enum_list[connector_type].name, 928 connector->connector_type_id); 929 if (!connector->name) { 930 ret = -ENOMEM; 931 goto out_put; 932 } 933 934 INIT_LIST_HEAD(&connector->probed_modes); 935 INIT_LIST_HEAD(&connector->modes); 936 connector->edid_blob_ptr = NULL; 937 connector->status = connector_status_unknown; 938 939 drm_connector_get_cmdline_mode(connector); 940 941 /* We should add connectors at the end to avoid upsetting the connector 942 * index too much. */ 943 list_add_tail(&connector->head, &config->connector_list); 944 config->num_connector++; 945 946 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 947 drm_object_attach_property(&connector->base, 948 config->edid_property, 949 0); 950 951 drm_object_attach_property(&connector->base, 952 config->dpms_property, 0); 953 954 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 955 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); 956 } 957 958 connector->debugfs_entry = NULL; 959 960 out_put: 961 if (ret) 962 drm_mode_object_put(dev, &connector->base); 963 964 out_unlock: 965 drm_modeset_unlock_all(dev); 966 967 return ret; 968 } 969 EXPORT_SYMBOL(drm_connector_init); 970 971 /** 972 * drm_connector_cleanup - cleans up an initialised connector 973 * @connector: connector to cleanup 974 * 975 * Cleans up the connector but doesn't free the object. 976 */ 977 void drm_connector_cleanup(struct drm_connector *connector) 978 { 979 struct drm_device *dev = connector->dev; 980 struct drm_display_mode *mode, *t; 981 982 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 983 drm_mode_remove(connector, mode); 984 985 list_for_each_entry_safe(mode, t, &connector->modes, head) 986 drm_mode_remove(connector, mode); 987 988 ida_remove(&drm_connector_enum_list[connector->connector_type].ida, 989 connector->connector_type_id); 990 991 ida_remove(&dev->mode_config.connector_ida, 992 connector->connector_id); 993 994 kfree(connector->display_info.bus_formats); 995 drm_mode_object_put(dev, &connector->base); 996 kfree(connector->name); 997 connector->name = NULL; 998 list_del(&connector->head); 999 dev->mode_config.num_connector--; 1000 1001 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 1002 if (connector->state && connector->funcs->atomic_destroy_state) 1003 connector->funcs->atomic_destroy_state(connector, 1004 connector->state); 1005 1006 memset(connector, 0, sizeof(*connector)); 1007 } 1008 EXPORT_SYMBOL(drm_connector_cleanup); 1009 1010 /** 1011 * drm_connector_index - find the index of a registered connector 1012 * @connector: connector to find index for 1013 * 1014 * Given a registered connector, return the index of that connector within a DRM 1015 * device's list of connectors. 1016 */ 1017 unsigned int drm_connector_index(struct drm_connector *connector) 1018 { 1019 unsigned int index = 0; 1020 struct drm_connector *tmp; 1021 struct drm_mode_config *config = &connector->dev->mode_config; 1022 1023 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 1024 1025 drm_for_each_connector(tmp, connector->dev) { 1026 if (tmp == connector) 1027 return index; 1028 1029 index++; 1030 } 1031 1032 BUG(); 1033 } 1034 EXPORT_SYMBOL(drm_connector_index); 1035 1036 /** 1037 * drm_connector_register - register a connector 1038 * @connector: the connector to register 1039 * 1040 * Register userspace interfaces for a connector 1041 * 1042 * Returns: 1043 * Zero on success, error code on failure. 1044 */ 1045 int drm_connector_register(struct drm_connector *connector) 1046 { 1047 int ret; 1048 1049 drm_mode_object_register(connector->dev, &connector->base); 1050 1051 ret = drm_sysfs_connector_add(connector); 1052 if (ret) 1053 return ret; 1054 1055 ret = drm_debugfs_connector_add(connector); 1056 if (ret) { 1057 drm_sysfs_connector_remove(connector); 1058 return ret; 1059 } 1060 1061 return 0; 1062 } 1063 EXPORT_SYMBOL(drm_connector_register); 1064 1065 /** 1066 * drm_connector_unregister - unregister a connector 1067 * @connector: the connector to unregister 1068 * 1069 * Unregister userspace interfaces for a connector 1070 */ 1071 void drm_connector_unregister(struct drm_connector *connector) 1072 { 1073 drm_sysfs_connector_remove(connector); 1074 #if 0 1075 drm_debugfs_connector_remove(connector); 1076 #endif 1077 } 1078 EXPORT_SYMBOL(drm_connector_unregister); 1079 1080 1081 /** 1082 * drm_connector_unplug_all - unregister connector userspace interfaces 1083 * @dev: drm device 1084 * 1085 * This function unregisters all connector userspace interfaces in sysfs. Should 1086 * be call when the device is disconnected, e.g. from an usb driver's 1087 * ->disconnect callback. 1088 */ 1089 void drm_connector_unplug_all(struct drm_device *dev) 1090 { 1091 struct drm_connector *connector; 1092 1093 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */ 1094 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1095 drm_connector_unregister(connector); 1096 1097 } 1098 EXPORT_SYMBOL(drm_connector_unplug_all); 1099 1100 /** 1101 * drm_encoder_init - Init a preallocated encoder 1102 * @dev: drm device 1103 * @encoder: the encoder to init 1104 * @funcs: callbacks for this encoder 1105 * @encoder_type: user visible type of the encoder 1106 * @name: printf style format string for the encoder name, or NULL for default name 1107 * 1108 * Initialises a preallocated encoder. Encoder should be 1109 * subclassed as part of driver encoder objects. 1110 * 1111 * Returns: 1112 * Zero on success, error code on failure. 1113 */ 1114 int drm_encoder_init(struct drm_device *dev, 1115 struct drm_encoder *encoder, 1116 const struct drm_encoder_funcs *funcs, 1117 int encoder_type, const char *name, ...) 1118 { 1119 int ret; 1120 1121 drm_modeset_lock_all(dev); 1122 1123 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1124 if (ret) 1125 goto out_unlock; 1126 1127 encoder->dev = dev; 1128 encoder->encoder_type = encoder_type; 1129 encoder->funcs = funcs; 1130 if (name) { 1131 __va_list ap; 1132 1133 __va_start(ap, name); 1134 encoder->name = kvasprintf(GFP_KERNEL, name, ap); 1135 __va_end(ap); 1136 } else { 1137 encoder->name = kasprintf(GFP_KERNEL, "%s-%d", 1138 drm_encoder_enum_list[encoder_type].name, 1139 encoder->base.id); 1140 } 1141 if (!encoder->name) { 1142 ret = -ENOMEM; 1143 goto out_put; 1144 } 1145 1146 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1147 dev->mode_config.num_encoder++; 1148 1149 out_put: 1150 if (ret) 1151 drm_mode_object_put(dev, &encoder->base); 1152 1153 out_unlock: 1154 drm_modeset_unlock_all(dev); 1155 1156 return ret; 1157 } 1158 EXPORT_SYMBOL(drm_encoder_init); 1159 1160 /** 1161 * drm_encoder_index - find the index of a registered encoder 1162 * @encoder: encoder to find index for 1163 * 1164 * Given a registered encoder, return the index of that encoder within a DRM 1165 * device's list of encoders. 1166 */ 1167 unsigned int drm_encoder_index(struct drm_encoder *encoder) 1168 { 1169 unsigned int index = 0; 1170 struct drm_encoder *tmp; 1171 1172 drm_for_each_encoder(tmp, encoder->dev) { 1173 if (tmp == encoder) 1174 return index; 1175 1176 index++; 1177 } 1178 1179 BUG(); 1180 } 1181 EXPORT_SYMBOL(drm_encoder_index); 1182 1183 /** 1184 * drm_encoder_cleanup - cleans up an initialised encoder 1185 * @encoder: encoder to cleanup 1186 * 1187 * Cleans up the encoder but doesn't free the object. 1188 */ 1189 void drm_encoder_cleanup(struct drm_encoder *encoder) 1190 { 1191 struct drm_device *dev = encoder->dev; 1192 1193 drm_modeset_lock_all(dev); 1194 drm_mode_object_put(dev, &encoder->base); 1195 kfree(encoder->name); 1196 list_del(&encoder->head); 1197 dev->mode_config.num_encoder--; 1198 drm_modeset_unlock_all(dev); 1199 1200 memset(encoder, 0, sizeof(*encoder)); 1201 } 1202 EXPORT_SYMBOL(drm_encoder_cleanup); 1203 1204 static unsigned int drm_num_planes(struct drm_device *dev) 1205 { 1206 unsigned int num = 0; 1207 struct drm_plane *tmp; 1208 1209 drm_for_each_plane(tmp, dev) { 1210 num++; 1211 } 1212 1213 return num; 1214 } 1215 1216 /** 1217 * drm_universal_plane_init - Initialize a new universal plane object 1218 * @dev: DRM device 1219 * @plane: plane object to init 1220 * @possible_crtcs: bitmask of possible CRTCs 1221 * @funcs: callbacks for the new plane 1222 * @formats: array of supported formats (%DRM_FORMAT_*) 1223 * @format_count: number of elements in @formats 1224 * @type: type of plane (overlay, primary, cursor) 1225 * @name: printf style format string for the plane name, or NULL for default name 1226 * 1227 * Initializes a plane object of type @type. 1228 * 1229 * Returns: 1230 * Zero on success, error code on failure. 1231 */ 1232 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1233 unsigned long possible_crtcs, 1234 const struct drm_plane_funcs *funcs, 1235 const uint32_t *formats, unsigned int format_count, 1236 enum drm_plane_type type, 1237 const char *name, ...) 1238 { 1239 struct drm_mode_config *config = &dev->mode_config; 1240 int ret; 1241 1242 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1243 if (ret) 1244 return ret; 1245 1246 drm_modeset_lock_init(&plane->mutex); 1247 1248 plane->base.properties = &plane->properties; 1249 plane->dev = dev; 1250 plane->funcs = funcs; 1251 plane->format_types = kmalloc(format_count * sizeof(uint32_t), 1252 M_DRM, M_WAITOK); 1253 if (!plane->format_types) { 1254 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1255 drm_mode_object_put(dev, &plane->base); 1256 return -ENOMEM; 1257 } 1258 1259 if (name) { 1260 __va_list ap; 1261 1262 __va_start(ap, name); 1263 plane->name = kvasprintf(GFP_KERNEL, name, ap); 1264 __va_end(ap); 1265 } else { 1266 plane->name = kasprintf(GFP_KERNEL, "plane-%d", 1267 drm_num_planes(dev)); 1268 } 1269 if (!plane->name) { 1270 kfree(plane->format_types); 1271 drm_mode_object_put(dev, &plane->base); 1272 return -ENOMEM; 1273 } 1274 1275 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1276 plane->format_count = format_count; 1277 plane->possible_crtcs = possible_crtcs; 1278 plane->type = type; 1279 1280 list_add_tail(&plane->head, &config->plane_list); 1281 config->num_total_plane++; 1282 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1283 config->num_overlay_plane++; 1284 1285 drm_object_attach_property(&plane->base, 1286 config->plane_type_property, 1287 plane->type); 1288 1289 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 1290 drm_object_attach_property(&plane->base, config->prop_fb_id, 0); 1291 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); 1292 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); 1293 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); 1294 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); 1295 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); 1296 drm_object_attach_property(&plane->base, config->prop_src_x, 0); 1297 drm_object_attach_property(&plane->base, config->prop_src_y, 0); 1298 drm_object_attach_property(&plane->base, config->prop_src_w, 0); 1299 drm_object_attach_property(&plane->base, config->prop_src_h, 0); 1300 } 1301 1302 return 0; 1303 } 1304 EXPORT_SYMBOL(drm_universal_plane_init); 1305 1306 /** 1307 * drm_plane_init - Initialize a legacy plane 1308 * @dev: DRM device 1309 * @plane: plane object to init 1310 * @possible_crtcs: bitmask of possible CRTCs 1311 * @funcs: callbacks for the new plane 1312 * @formats: array of supported formats (%DRM_FORMAT_*) 1313 * @format_count: number of elements in @formats 1314 * @is_primary: plane type (primary vs overlay) 1315 * 1316 * Legacy API to initialize a DRM plane. 1317 * 1318 * New drivers should call drm_universal_plane_init() instead. 1319 * 1320 * Returns: 1321 * Zero on success, error code on failure. 1322 */ 1323 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1324 unsigned long possible_crtcs, 1325 const struct drm_plane_funcs *funcs, 1326 const uint32_t *formats, unsigned int format_count, 1327 bool is_primary) 1328 { 1329 enum drm_plane_type type; 1330 1331 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1332 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1333 formats, format_count, type, NULL); 1334 } 1335 EXPORT_SYMBOL(drm_plane_init); 1336 1337 /** 1338 * drm_plane_cleanup - Clean up the core plane usage 1339 * @plane: plane to cleanup 1340 * 1341 * This function cleans up @plane and removes it from the DRM mode setting 1342 * core. Note that the function does *not* free the plane structure itself, 1343 * this is the responsibility of the caller. 1344 */ 1345 void drm_plane_cleanup(struct drm_plane *plane) 1346 { 1347 struct drm_device *dev = plane->dev; 1348 1349 drm_modeset_lock_all(dev); 1350 kfree(plane->format_types); 1351 drm_mode_object_put(dev, &plane->base); 1352 1353 BUG_ON(list_empty(&plane->head)); 1354 1355 list_del(&plane->head); 1356 dev->mode_config.num_total_plane--; 1357 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1358 dev->mode_config.num_overlay_plane--; 1359 drm_modeset_unlock_all(dev); 1360 1361 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1362 if (plane->state && plane->funcs->atomic_destroy_state) 1363 plane->funcs->atomic_destroy_state(plane, plane->state); 1364 1365 kfree(plane->name); 1366 1367 memset(plane, 0, sizeof(*plane)); 1368 } 1369 EXPORT_SYMBOL(drm_plane_cleanup); 1370 1371 /** 1372 * drm_plane_index - find the index of a registered plane 1373 * @plane: plane to find index for 1374 * 1375 * Given a registered plane, return the index of that CRTC within a DRM 1376 * device's list of planes. 1377 */ 1378 unsigned int drm_plane_index(struct drm_plane *plane) 1379 { 1380 unsigned int index = 0; 1381 struct drm_plane *tmp; 1382 1383 drm_for_each_plane(tmp, plane->dev) { 1384 if (tmp == plane) 1385 return index; 1386 1387 index++; 1388 } 1389 1390 BUG(); 1391 } 1392 EXPORT_SYMBOL(drm_plane_index); 1393 1394 /** 1395 * drm_plane_from_index - find the registered plane at an index 1396 * @dev: DRM device 1397 * @idx: index of registered plane to find for 1398 * 1399 * Given a plane index, return the registered plane from DRM device's 1400 * list of planes with matching index. 1401 */ 1402 struct drm_plane * 1403 drm_plane_from_index(struct drm_device *dev, int idx) 1404 { 1405 struct drm_plane *plane; 1406 unsigned int i = 0; 1407 1408 drm_for_each_plane(plane, dev) { 1409 if (i == idx) 1410 return plane; 1411 i++; 1412 } 1413 return NULL; 1414 } 1415 EXPORT_SYMBOL(drm_plane_from_index); 1416 1417 /** 1418 * drm_plane_force_disable - Forcibly disable a plane 1419 * @plane: plane to disable 1420 * 1421 * Forces the plane to be disabled. 1422 * 1423 * Used when the plane's current framebuffer is destroyed, 1424 * and when restoring fbdev mode. 1425 */ 1426 void drm_plane_force_disable(struct drm_plane *plane) 1427 { 1428 int ret; 1429 1430 if (!plane->fb) 1431 return; 1432 1433 plane->old_fb = plane->fb; 1434 ret = plane->funcs->disable_plane(plane); 1435 if (ret) { 1436 DRM_ERROR("failed to disable plane with busy fb\n"); 1437 plane->old_fb = NULL; 1438 return; 1439 } 1440 /* disconnect the plane from the fb and crtc: */ 1441 drm_framebuffer_unreference(plane->old_fb); 1442 plane->old_fb = NULL; 1443 plane->fb = NULL; 1444 plane->crtc = NULL; 1445 } 1446 EXPORT_SYMBOL(drm_plane_force_disable); 1447 1448 static int drm_mode_create_standard_properties(struct drm_device *dev) 1449 { 1450 struct drm_property *prop; 1451 1452 /* 1453 * Standard properties (apply to all connectors) 1454 */ 1455 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1456 DRM_MODE_PROP_IMMUTABLE, 1457 "EDID", 0); 1458 if (!prop) 1459 return -ENOMEM; 1460 dev->mode_config.edid_property = prop; 1461 1462 prop = drm_property_create_enum(dev, 0, 1463 "DPMS", drm_dpms_enum_list, 1464 ARRAY_SIZE(drm_dpms_enum_list)); 1465 if (!prop) 1466 return -ENOMEM; 1467 dev->mode_config.dpms_property = prop; 1468 1469 prop = drm_property_create(dev, 1470 DRM_MODE_PROP_BLOB | 1471 DRM_MODE_PROP_IMMUTABLE, 1472 "PATH", 0); 1473 if (!prop) 1474 return -ENOMEM; 1475 dev->mode_config.path_property = prop; 1476 1477 prop = drm_property_create(dev, 1478 DRM_MODE_PROP_BLOB | 1479 DRM_MODE_PROP_IMMUTABLE, 1480 "TILE", 0); 1481 if (!prop) 1482 return -ENOMEM; 1483 dev->mode_config.tile_property = prop; 1484 1485 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1486 "type", drm_plane_type_enum_list, 1487 ARRAY_SIZE(drm_plane_type_enum_list)); 1488 if (!prop) 1489 return -ENOMEM; 1490 dev->mode_config.plane_type_property = prop; 1491 1492 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1493 "SRC_X", 0, UINT_MAX); 1494 if (!prop) 1495 return -ENOMEM; 1496 dev->mode_config.prop_src_x = prop; 1497 1498 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1499 "SRC_Y", 0, UINT_MAX); 1500 if (!prop) 1501 return -ENOMEM; 1502 dev->mode_config.prop_src_y = prop; 1503 1504 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1505 "SRC_W", 0, UINT_MAX); 1506 if (!prop) 1507 return -ENOMEM; 1508 dev->mode_config.prop_src_w = prop; 1509 1510 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1511 "SRC_H", 0, UINT_MAX); 1512 if (!prop) 1513 return -ENOMEM; 1514 dev->mode_config.prop_src_h = prop; 1515 1516 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1517 "CRTC_X", INT_MIN, INT_MAX); 1518 if (!prop) 1519 return -ENOMEM; 1520 dev->mode_config.prop_crtc_x = prop; 1521 1522 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1523 "CRTC_Y", INT_MIN, INT_MAX); 1524 if (!prop) 1525 return -ENOMEM; 1526 dev->mode_config.prop_crtc_y = prop; 1527 1528 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1529 "CRTC_W", 0, INT_MAX); 1530 if (!prop) 1531 return -ENOMEM; 1532 dev->mode_config.prop_crtc_w = prop; 1533 1534 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1535 "CRTC_H", 0, INT_MAX); 1536 if (!prop) 1537 return -ENOMEM; 1538 dev->mode_config.prop_crtc_h = prop; 1539 1540 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1541 "FB_ID", DRM_MODE_OBJECT_FB); 1542 if (!prop) 1543 return -ENOMEM; 1544 dev->mode_config.prop_fb_id = prop; 1545 1546 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1547 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 1548 if (!prop) 1549 return -ENOMEM; 1550 dev->mode_config.prop_crtc_id = prop; 1551 1552 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 1553 "ACTIVE"); 1554 if (!prop) 1555 return -ENOMEM; 1556 dev->mode_config.prop_active = prop; 1557 1558 prop = drm_property_create(dev, 1559 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 1560 "MODE_ID", 0); 1561 if (!prop) 1562 return -ENOMEM; 1563 dev->mode_config.prop_mode_id = prop; 1564 1565 prop = drm_property_create(dev, 1566 DRM_MODE_PROP_BLOB, 1567 "DEGAMMA_LUT", 0); 1568 if (!prop) 1569 return -ENOMEM; 1570 dev->mode_config.degamma_lut_property = prop; 1571 1572 prop = drm_property_create_range(dev, 1573 DRM_MODE_PROP_IMMUTABLE, 1574 "DEGAMMA_LUT_SIZE", 0, UINT_MAX); 1575 if (!prop) 1576 return -ENOMEM; 1577 dev->mode_config.degamma_lut_size_property = prop; 1578 1579 prop = drm_property_create(dev, 1580 DRM_MODE_PROP_BLOB, 1581 "CTM", 0); 1582 if (!prop) 1583 return -ENOMEM; 1584 dev->mode_config.ctm_property = prop; 1585 1586 prop = drm_property_create(dev, 1587 DRM_MODE_PROP_BLOB, 1588 "GAMMA_LUT", 0); 1589 if (!prop) 1590 return -ENOMEM; 1591 dev->mode_config.gamma_lut_property = prop; 1592 1593 prop = drm_property_create_range(dev, 1594 DRM_MODE_PROP_IMMUTABLE, 1595 "GAMMA_LUT_SIZE", 0, UINT_MAX); 1596 if (!prop) 1597 return -ENOMEM; 1598 dev->mode_config.gamma_lut_size_property = prop; 1599 1600 return 0; 1601 } 1602 1603 /** 1604 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1605 * @dev: DRM device 1606 * 1607 * Called by a driver the first time a DVI-I connector is made. 1608 */ 1609 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1610 { 1611 struct drm_property *dvi_i_selector; 1612 struct drm_property *dvi_i_subconnector; 1613 1614 if (dev->mode_config.dvi_i_select_subconnector_property) 1615 return 0; 1616 1617 dvi_i_selector = 1618 drm_property_create_enum(dev, 0, 1619 "select subconnector", 1620 drm_dvi_i_select_enum_list, 1621 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1622 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1623 1624 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1625 "subconnector", 1626 drm_dvi_i_subconnector_enum_list, 1627 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1628 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1629 1630 return 0; 1631 } 1632 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1633 1634 /** 1635 * drm_create_tv_properties - create TV specific connector properties 1636 * @dev: DRM device 1637 * @num_modes: number of different TV formats (modes) supported 1638 * @modes: array of pointers to strings containing name of each format 1639 * 1640 * Called by a driver's TV initialization routine, this function creates 1641 * the TV specific connector properties for a given device. Caller is 1642 * responsible for allocating a list of format names and passing them to 1643 * this routine. 1644 */ 1645 int drm_mode_create_tv_properties(struct drm_device *dev, 1646 unsigned int num_modes, 1647 const char * const modes[]) 1648 { 1649 struct drm_property *tv_selector; 1650 struct drm_property *tv_subconnector; 1651 unsigned int i; 1652 1653 if (dev->mode_config.tv_select_subconnector_property) 1654 return 0; 1655 1656 /* 1657 * Basic connector properties 1658 */ 1659 tv_selector = drm_property_create_enum(dev, 0, 1660 "select subconnector", 1661 drm_tv_select_enum_list, 1662 ARRAY_SIZE(drm_tv_select_enum_list)); 1663 if (!tv_selector) 1664 goto nomem; 1665 1666 dev->mode_config.tv_select_subconnector_property = tv_selector; 1667 1668 tv_subconnector = 1669 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1670 "subconnector", 1671 drm_tv_subconnector_enum_list, 1672 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1673 if (!tv_subconnector) 1674 goto nomem; 1675 dev->mode_config.tv_subconnector_property = tv_subconnector; 1676 1677 /* 1678 * Other, TV specific properties: margins & TV modes. 1679 */ 1680 dev->mode_config.tv_left_margin_property = 1681 drm_property_create_range(dev, 0, "left margin", 0, 100); 1682 if (!dev->mode_config.tv_left_margin_property) 1683 goto nomem; 1684 1685 dev->mode_config.tv_right_margin_property = 1686 drm_property_create_range(dev, 0, "right margin", 0, 100); 1687 if (!dev->mode_config.tv_right_margin_property) 1688 goto nomem; 1689 1690 dev->mode_config.tv_top_margin_property = 1691 drm_property_create_range(dev, 0, "top margin", 0, 100); 1692 if (!dev->mode_config.tv_top_margin_property) 1693 goto nomem; 1694 1695 dev->mode_config.tv_bottom_margin_property = 1696 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1697 if (!dev->mode_config.tv_bottom_margin_property) 1698 goto nomem; 1699 1700 dev->mode_config.tv_mode_property = 1701 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1702 "mode", num_modes); 1703 if (!dev->mode_config.tv_mode_property) 1704 goto nomem; 1705 1706 for (i = 0; i < num_modes; i++) 1707 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1708 i, modes[i]); 1709 1710 dev->mode_config.tv_brightness_property = 1711 drm_property_create_range(dev, 0, "brightness", 0, 100); 1712 if (!dev->mode_config.tv_brightness_property) 1713 goto nomem; 1714 1715 dev->mode_config.tv_contrast_property = 1716 drm_property_create_range(dev, 0, "contrast", 0, 100); 1717 if (!dev->mode_config.tv_contrast_property) 1718 goto nomem; 1719 1720 dev->mode_config.tv_flicker_reduction_property = 1721 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1722 if (!dev->mode_config.tv_flicker_reduction_property) 1723 goto nomem; 1724 1725 dev->mode_config.tv_overscan_property = 1726 drm_property_create_range(dev, 0, "overscan", 0, 100); 1727 if (!dev->mode_config.tv_overscan_property) 1728 goto nomem; 1729 1730 dev->mode_config.tv_saturation_property = 1731 drm_property_create_range(dev, 0, "saturation", 0, 100); 1732 if (!dev->mode_config.tv_saturation_property) 1733 goto nomem; 1734 1735 dev->mode_config.tv_hue_property = 1736 drm_property_create_range(dev, 0, "hue", 0, 100); 1737 if (!dev->mode_config.tv_hue_property) 1738 goto nomem; 1739 1740 return 0; 1741 nomem: 1742 return -ENOMEM; 1743 } 1744 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1745 1746 /** 1747 * drm_mode_create_scaling_mode_property - create scaling mode property 1748 * @dev: DRM device 1749 * 1750 * Called by a driver the first time it's needed, must be attached to desired 1751 * connectors. 1752 */ 1753 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1754 { 1755 struct drm_property *scaling_mode; 1756 1757 if (dev->mode_config.scaling_mode_property) 1758 return 0; 1759 1760 scaling_mode = 1761 drm_property_create_enum(dev, 0, "scaling mode", 1762 drm_scaling_mode_enum_list, 1763 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1764 1765 dev->mode_config.scaling_mode_property = scaling_mode; 1766 1767 return 0; 1768 } 1769 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1770 1771 /** 1772 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1773 * @dev: DRM device 1774 * 1775 * Called by a driver the first time it's needed, must be attached to desired 1776 * connectors. 1777 * 1778 * Returns: 1779 * Zero on success, negative errno on failure. 1780 */ 1781 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1782 { 1783 if (dev->mode_config.aspect_ratio_property) 1784 return 0; 1785 1786 dev->mode_config.aspect_ratio_property = 1787 drm_property_create_enum(dev, 0, "aspect ratio", 1788 drm_aspect_ratio_enum_list, 1789 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1790 1791 if (dev->mode_config.aspect_ratio_property == NULL) 1792 return -ENOMEM; 1793 1794 return 0; 1795 } 1796 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1797 1798 /** 1799 * drm_mode_create_dirty_property - create dirty property 1800 * @dev: DRM device 1801 * 1802 * Called by a driver the first time it's needed, must be attached to desired 1803 * connectors. 1804 */ 1805 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1806 { 1807 struct drm_property *dirty_info; 1808 1809 if (dev->mode_config.dirty_info_property) 1810 return 0; 1811 1812 dirty_info = 1813 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1814 "dirty", 1815 drm_dirty_info_enum_list, 1816 ARRAY_SIZE(drm_dirty_info_enum_list)); 1817 dev->mode_config.dirty_info_property = dirty_info; 1818 1819 return 0; 1820 } 1821 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1822 1823 /** 1824 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1825 * @dev: DRM device 1826 * 1827 * Create the the suggested x/y offset property for connectors. 1828 */ 1829 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1830 { 1831 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1832 return 0; 1833 1834 dev->mode_config.suggested_x_property = 1835 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1836 1837 dev->mode_config.suggested_y_property = 1838 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1839 1840 if (dev->mode_config.suggested_x_property == NULL || 1841 dev->mode_config.suggested_y_property == NULL) 1842 return -ENOMEM; 1843 return 0; 1844 } 1845 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1846 1847 /** 1848 * drm_mode_getresources - get graphics configuration 1849 * @dev: drm device for the ioctl 1850 * @data: data pointer for the ioctl 1851 * @file_priv: drm file for the ioctl call 1852 * 1853 * Construct a set of configuration description structures and return 1854 * them to the user, including CRTC, connector and framebuffer configuration. 1855 * 1856 * Called by the user via ioctl. 1857 * 1858 * Returns: 1859 * Zero on success, negative errno on failure. 1860 */ 1861 int drm_mode_getresources(struct drm_device *dev, void *data, 1862 struct drm_file *file_priv) 1863 { 1864 struct drm_mode_card_res *card_res = data; 1865 struct list_head *lh; 1866 struct drm_framebuffer *fb; 1867 struct drm_connector *connector; 1868 struct drm_crtc *crtc; 1869 struct drm_encoder *encoder; 1870 int ret = 0; 1871 int connector_count = 0; 1872 int crtc_count = 0; 1873 int fb_count = 0; 1874 int encoder_count = 0; 1875 int copied = 0; 1876 uint32_t __user *fb_id; 1877 uint32_t __user *crtc_id; 1878 uint32_t __user *connector_id; 1879 uint32_t __user *encoder_id; 1880 1881 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1882 return -EINVAL; 1883 1884 1885 mutex_lock(&file_priv->fbs_lock); 1886 /* 1887 * For the non-control nodes we need to limit the list of resources 1888 * by IDs in the group list for this node 1889 */ 1890 list_for_each(lh, &file_priv->fbs) 1891 fb_count++; 1892 1893 /* handle this in 4 parts */ 1894 /* FBs */ 1895 if (card_res->count_fbs >= fb_count) { 1896 copied = 0; 1897 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1898 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1899 if (put_user(fb->base.id, fb_id + copied)) { 1900 mutex_unlock(&file_priv->fbs_lock); 1901 return -EFAULT; 1902 } 1903 copied++; 1904 } 1905 } 1906 card_res->count_fbs = fb_count; 1907 mutex_unlock(&file_priv->fbs_lock); 1908 1909 /* mode_config.mutex protects the connector list against e.g. DP MST 1910 * connector hot-adding. CRTC/Plane lists are invariant. */ 1911 mutex_lock(&dev->mode_config.mutex); 1912 drm_for_each_crtc(crtc, dev) 1913 crtc_count++; 1914 1915 drm_for_each_connector(connector, dev) 1916 connector_count++; 1917 1918 drm_for_each_encoder(encoder, dev) 1919 encoder_count++; 1920 1921 card_res->max_height = dev->mode_config.max_height; 1922 card_res->min_height = dev->mode_config.min_height; 1923 card_res->max_width = dev->mode_config.max_width; 1924 card_res->min_width = dev->mode_config.min_width; 1925 1926 /* CRTCs */ 1927 if (card_res->count_crtcs >= crtc_count) { 1928 copied = 0; 1929 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1930 drm_for_each_crtc(crtc, dev) { 1931 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", 1932 crtc->base.id, crtc->name); 1933 if (put_user(crtc->base.id, crtc_id + copied)) { 1934 ret = -EFAULT; 1935 goto out; 1936 } 1937 copied++; 1938 } 1939 } 1940 card_res->count_crtcs = crtc_count; 1941 1942 /* Encoders */ 1943 if (card_res->count_encoders >= encoder_count) { 1944 copied = 0; 1945 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1946 drm_for_each_encoder(encoder, dev) { 1947 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1948 encoder->name); 1949 if (put_user(encoder->base.id, encoder_id + 1950 copied)) { 1951 ret = -EFAULT; 1952 goto out; 1953 } 1954 copied++; 1955 } 1956 } 1957 card_res->count_encoders = encoder_count; 1958 1959 /* Connectors */ 1960 if (card_res->count_connectors >= connector_count) { 1961 copied = 0; 1962 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1963 drm_for_each_connector(connector, dev) { 1964 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1965 connector->base.id, 1966 connector->name); 1967 if (put_user(connector->base.id, 1968 connector_id + copied)) { 1969 ret = -EFAULT; 1970 goto out; 1971 } 1972 copied++; 1973 } 1974 } 1975 card_res->count_connectors = connector_count; 1976 1977 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1978 card_res->count_connectors, card_res->count_encoders); 1979 1980 out: 1981 mutex_unlock(&dev->mode_config.mutex); 1982 return ret; 1983 } 1984 1985 /** 1986 * drm_mode_getcrtc - get CRTC configuration 1987 * @dev: drm device for the ioctl 1988 * @data: data pointer for the ioctl 1989 * @file_priv: drm file for the ioctl call 1990 * 1991 * Construct a CRTC configuration structure to return to the user. 1992 * 1993 * Called by the user via ioctl. 1994 * 1995 * Returns: 1996 * Zero on success, negative errno on failure. 1997 */ 1998 int drm_mode_getcrtc(struct drm_device *dev, 1999 void *data, struct drm_file *file_priv) 2000 { 2001 struct drm_mode_crtc *crtc_resp = data; 2002 struct drm_crtc *crtc; 2003 2004 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2005 return -EINVAL; 2006 2007 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 2008 if (!crtc) 2009 return -ENOENT; 2010 2011 drm_modeset_lock_crtc(crtc, crtc->primary); 2012 crtc_resp->gamma_size = crtc->gamma_size; 2013 if (crtc->primary->fb) 2014 crtc_resp->fb_id = crtc->primary->fb->base.id; 2015 else 2016 crtc_resp->fb_id = 0; 2017 2018 if (crtc->state) { 2019 crtc_resp->x = crtc->primary->state->src_x >> 16; 2020 crtc_resp->y = crtc->primary->state->src_y >> 16; 2021 if (crtc->state->enable) { 2022 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); 2023 crtc_resp->mode_valid = 1; 2024 2025 } else { 2026 crtc_resp->mode_valid = 0; 2027 } 2028 } else { 2029 crtc_resp->x = crtc->x; 2030 crtc_resp->y = crtc->y; 2031 if (crtc->enabled) { 2032 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); 2033 crtc_resp->mode_valid = 1; 2034 2035 } else { 2036 crtc_resp->mode_valid = 0; 2037 } 2038 } 2039 drm_modeset_unlock_crtc(crtc); 2040 2041 return 0; 2042 } 2043 2044 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 2045 const struct drm_file *file_priv) 2046 { 2047 /* 2048 * If user-space hasn't configured the driver to expose the stereo 3D 2049 * modes, don't expose them. 2050 */ 2051 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 2052 return false; 2053 2054 return true; 2055 } 2056 2057 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 2058 { 2059 /* For atomic drivers only state objects are synchronously updated and 2060 * protected by modeset locks, so check those first. */ 2061 if (connector->state) 2062 return connector->state->best_encoder; 2063 return connector->encoder; 2064 } 2065 2066 /* helper for getconnector and getproperties ioctls */ 2067 static int get_properties(struct drm_mode_object *obj, bool atomic, 2068 uint32_t __user *prop_ptr, uint64_t __user *prop_values, 2069 uint32_t *arg_count_props) 2070 { 2071 int props_count; 2072 int i, ret, copied; 2073 2074 props_count = obj->properties->count; 2075 if (!atomic) 2076 props_count -= obj->properties->atomic_count; 2077 2078 if ((*arg_count_props >= props_count) && props_count) { 2079 for (i = 0, copied = 0; copied < props_count; i++) { 2080 struct drm_property *prop = obj->properties->properties[i]; 2081 uint64_t val; 2082 2083 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) 2084 continue; 2085 2086 ret = drm_object_property_get_value(obj, prop, &val); 2087 if (ret) 2088 return ret; 2089 2090 if (put_user(prop->base.id, prop_ptr + copied)) 2091 return -EFAULT; 2092 2093 if (put_user(val, prop_values + copied)) 2094 return -EFAULT; 2095 2096 copied++; 2097 } 2098 } 2099 *arg_count_props = props_count; 2100 2101 return 0; 2102 } 2103 2104 /** 2105 * drm_mode_getconnector - get connector configuration 2106 * @dev: drm device for the ioctl 2107 * @data: data pointer for the ioctl 2108 * @file_priv: drm file for the ioctl call 2109 * 2110 * Construct a connector configuration structure to return to the user. 2111 * 2112 * Called by the user via ioctl. 2113 * 2114 * Returns: 2115 * Zero on success, negative errno on failure. 2116 */ 2117 int drm_mode_getconnector(struct drm_device *dev, void *data, 2118 struct drm_file *file_priv) 2119 { 2120 struct drm_mode_get_connector *out_resp = data; 2121 struct drm_connector *connector; 2122 struct drm_encoder *encoder; 2123 struct drm_display_mode *mode; 2124 int mode_count = 0; 2125 int encoders_count = 0; 2126 int ret = 0; 2127 int copied = 0; 2128 int i; 2129 struct drm_mode_modeinfo u_mode; 2130 struct drm_mode_modeinfo __user *mode_ptr; 2131 uint32_t __user *encoder_ptr; 2132 2133 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2134 return -EINVAL; 2135 2136 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2137 2138 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 2139 2140 mutex_lock(&dev->mode_config.mutex); 2141 2142 connector = drm_connector_find(dev, out_resp->connector_id); 2143 if (!connector) { 2144 ret = -ENOENT; 2145 goto out_unlock; 2146 } 2147 2148 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) 2149 if (connector->encoder_ids[i] != 0) 2150 encoders_count++; 2151 2152 if (out_resp->count_modes == 0) { 2153 connector->funcs->fill_modes(connector, 2154 dev->mode_config.max_width, 2155 dev->mode_config.max_height); 2156 } 2157 2158 /* delayed so we get modes regardless of pre-fill_modes state */ 2159 list_for_each_entry(mode, &connector->modes, head) 2160 if (drm_mode_expose_to_userspace(mode, file_priv)) 2161 mode_count++; 2162 2163 out_resp->connector_id = connector->base.id; 2164 out_resp->connector_type = connector->connector_type; 2165 out_resp->connector_type_id = connector->connector_type_id; 2166 out_resp->mm_width = connector->display_info.width_mm; 2167 out_resp->mm_height = connector->display_info.height_mm; 2168 out_resp->subpixel = connector->display_info.subpixel_order; 2169 out_resp->connection = connector->status; 2170 2171 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2172 encoder = drm_connector_get_encoder(connector); 2173 if (encoder) 2174 out_resp->encoder_id = encoder->base.id; 2175 else 2176 out_resp->encoder_id = 0; 2177 2178 /* 2179 * This ioctl is called twice, once to determine how much space is 2180 * needed, and the 2nd time to fill it. 2181 */ 2182 if ((out_resp->count_modes >= mode_count) && mode_count) { 2183 copied = 0; 2184 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2185 list_for_each_entry(mode, &connector->modes, head) { 2186 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2187 continue; 2188 2189 drm_mode_convert_to_umode(&u_mode, mode); 2190 if (copy_to_user(mode_ptr + copied, 2191 &u_mode, sizeof(u_mode))) { 2192 ret = -EFAULT; 2193 goto out; 2194 } 2195 copied++; 2196 } 2197 } 2198 out_resp->count_modes = mode_count; 2199 2200 ret = get_properties(&connector->base, file_priv->atomic, 2201 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2202 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2203 &out_resp->count_props); 2204 if (ret) 2205 goto out; 2206 2207 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2208 copied = 0; 2209 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2210 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2211 if (connector->encoder_ids[i] != 0) { 2212 if (put_user(connector->encoder_ids[i], 2213 encoder_ptr + copied)) { 2214 ret = -EFAULT; 2215 goto out; 2216 } 2217 copied++; 2218 } 2219 } 2220 } 2221 out_resp->count_encoders = encoders_count; 2222 2223 out: 2224 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2225 2226 out_unlock: 2227 mutex_unlock(&dev->mode_config.mutex); 2228 2229 return ret; 2230 } 2231 2232 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2233 { 2234 struct drm_connector *connector; 2235 struct drm_device *dev = encoder->dev; 2236 bool uses_atomic = false; 2237 2238 /* For atomic drivers only state objects are synchronously updated and 2239 * protected by modeset locks, so check those first. */ 2240 drm_for_each_connector(connector, dev) { 2241 if (!connector->state) 2242 continue; 2243 2244 uses_atomic = true; 2245 2246 if (connector->state->best_encoder != encoder) 2247 continue; 2248 2249 return connector->state->crtc; 2250 } 2251 2252 /* Don't return stale data (e.g. pending async disable). */ 2253 if (uses_atomic) 2254 return NULL; 2255 2256 return encoder->crtc; 2257 } 2258 2259 /** 2260 * drm_mode_getencoder - get encoder configuration 2261 * @dev: drm device for the ioctl 2262 * @data: data pointer for the ioctl 2263 * @file_priv: drm file for the ioctl call 2264 * 2265 * Construct a encoder configuration structure to return to the user. 2266 * 2267 * Called by the user via ioctl. 2268 * 2269 * Returns: 2270 * Zero on success, negative errno on failure. 2271 */ 2272 int drm_mode_getencoder(struct drm_device *dev, void *data, 2273 struct drm_file *file_priv) 2274 { 2275 struct drm_mode_get_encoder *enc_resp = data; 2276 struct drm_encoder *encoder; 2277 struct drm_crtc *crtc; 2278 2279 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2280 return -EINVAL; 2281 2282 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2283 if (!encoder) 2284 return -ENOENT; 2285 2286 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2287 crtc = drm_encoder_get_crtc(encoder); 2288 if (crtc) 2289 enc_resp->crtc_id = crtc->base.id; 2290 else 2291 enc_resp->crtc_id = 0; 2292 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2293 2294 enc_resp->encoder_type = encoder->encoder_type; 2295 enc_resp->encoder_id = encoder->base.id; 2296 enc_resp->possible_crtcs = encoder->possible_crtcs; 2297 enc_resp->possible_clones = encoder->possible_clones; 2298 2299 return 0; 2300 } 2301 2302 /** 2303 * drm_mode_getplane_res - enumerate all plane resources 2304 * @dev: DRM device 2305 * @data: ioctl data 2306 * @file_priv: DRM file info 2307 * 2308 * Construct a list of plane ids to return to the user. 2309 * 2310 * Called by the user via ioctl. 2311 * 2312 * Returns: 2313 * Zero on success, negative errno on failure. 2314 */ 2315 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2316 struct drm_file *file_priv) 2317 { 2318 struct drm_mode_get_plane_res *plane_resp = data; 2319 struct drm_mode_config *config; 2320 struct drm_plane *plane; 2321 uint32_t __user *plane_ptr; 2322 int copied = 0; 2323 unsigned num_planes; 2324 2325 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2326 return -EINVAL; 2327 2328 config = &dev->mode_config; 2329 2330 if (file_priv->universal_planes) 2331 num_planes = config->num_total_plane; 2332 else 2333 num_planes = config->num_overlay_plane; 2334 2335 /* 2336 * This ioctl is called twice, once to determine how much space is 2337 * needed, and the 2nd time to fill it. 2338 */ 2339 if (num_planes && 2340 (plane_resp->count_planes >= num_planes)) { 2341 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2342 2343 /* Plane lists are invariant, no locking needed. */ 2344 drm_for_each_plane(plane, dev) { 2345 /* 2346 * Unless userspace set the 'universal planes' 2347 * capability bit, only advertise overlays. 2348 */ 2349 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2350 !file_priv->universal_planes) 2351 continue; 2352 2353 if (put_user(plane->base.id, plane_ptr + copied)) 2354 return -EFAULT; 2355 copied++; 2356 } 2357 } 2358 plane_resp->count_planes = num_planes; 2359 2360 return 0; 2361 } 2362 2363 /** 2364 * drm_mode_getplane - get plane configuration 2365 * @dev: DRM device 2366 * @data: ioctl data 2367 * @file_priv: DRM file info 2368 * 2369 * Construct a plane configuration structure to return to the user. 2370 * 2371 * Called by the user via ioctl. 2372 * 2373 * Returns: 2374 * Zero on success, negative errno on failure. 2375 */ 2376 int drm_mode_getplane(struct drm_device *dev, void *data, 2377 struct drm_file *file_priv) 2378 { 2379 struct drm_mode_get_plane *plane_resp = data; 2380 struct drm_plane *plane; 2381 uint32_t __user *format_ptr; 2382 2383 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2384 return -EINVAL; 2385 2386 plane = drm_plane_find(dev, plane_resp->plane_id); 2387 if (!plane) 2388 return -ENOENT; 2389 2390 drm_modeset_lock(&plane->mutex, NULL); 2391 if (plane->crtc) 2392 plane_resp->crtc_id = plane->crtc->base.id; 2393 else 2394 plane_resp->crtc_id = 0; 2395 2396 if (plane->fb) 2397 plane_resp->fb_id = plane->fb->base.id; 2398 else 2399 plane_resp->fb_id = 0; 2400 drm_modeset_unlock(&plane->mutex); 2401 2402 plane_resp->plane_id = plane->base.id; 2403 plane_resp->possible_crtcs = plane->possible_crtcs; 2404 plane_resp->gamma_size = 0; 2405 2406 /* 2407 * This ioctl is called twice, once to determine how much space is 2408 * needed, and the 2nd time to fill it. 2409 */ 2410 if (plane->format_count && 2411 (plane_resp->count_format_types >= plane->format_count)) { 2412 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2413 if (copy_to_user(format_ptr, 2414 plane->format_types, 2415 sizeof(uint32_t) * plane->format_count)) { 2416 return -EFAULT; 2417 } 2418 } 2419 plane_resp->count_format_types = plane->format_count; 2420 2421 return 0; 2422 } 2423 2424 /** 2425 * drm_plane_check_pixel_format - Check if the plane supports the pixel format 2426 * @plane: plane to check for format support 2427 * @format: the pixel format 2428 * 2429 * Returns: 2430 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL 2431 * otherwise. 2432 */ 2433 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format) 2434 { 2435 unsigned int i; 2436 2437 for (i = 0; i < plane->format_count; i++) { 2438 if (format == plane->format_types[i]) 2439 return 0; 2440 } 2441 2442 return -EINVAL; 2443 } 2444 2445 static int check_src_coords(uint32_t src_x, uint32_t src_y, 2446 uint32_t src_w, uint32_t src_h, 2447 const struct drm_framebuffer *fb) 2448 { 2449 unsigned int fb_width, fb_height; 2450 2451 fb_width = fb->width << 16; 2452 fb_height = fb->height << 16; 2453 2454 /* Make sure source coordinates are inside the fb. */ 2455 if (src_w > fb_width || 2456 src_x > fb_width - src_w || 2457 src_h > fb_height || 2458 src_y > fb_height - src_h) { 2459 DRM_DEBUG_KMS("Invalid source coordinates " 2460 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2461 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2462 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2463 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2464 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2465 return -ENOSPC; 2466 } 2467 2468 return 0; 2469 } 2470 2471 /* 2472 * setplane_internal - setplane handler for internal callers 2473 * 2474 * Note that we assume an extra reference has already been taken on fb. If the 2475 * update fails, this reference will be dropped before return; if it succeeds, 2476 * the previous framebuffer (if any) will be unreferenced instead. 2477 * 2478 * src_{x,y,w,h} are provided in 16.16 fixed point format 2479 */ 2480 static int __setplane_internal(struct drm_plane *plane, 2481 struct drm_crtc *crtc, 2482 struct drm_framebuffer *fb, 2483 int32_t crtc_x, int32_t crtc_y, 2484 uint32_t crtc_w, uint32_t crtc_h, 2485 /* src_{x,y,w,h} values are 16.16 fixed point */ 2486 uint32_t src_x, uint32_t src_y, 2487 uint32_t src_w, uint32_t src_h) 2488 { 2489 int ret = 0; 2490 2491 /* No fb means shut it down */ 2492 if (!fb) { 2493 plane->old_fb = plane->fb; 2494 ret = plane->funcs->disable_plane(plane); 2495 if (!ret) { 2496 plane->crtc = NULL; 2497 plane->fb = NULL; 2498 } else { 2499 plane->old_fb = NULL; 2500 } 2501 goto out; 2502 } 2503 2504 /* Check whether this plane is usable on this CRTC */ 2505 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2506 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2507 ret = -EINVAL; 2508 goto out; 2509 } 2510 2511 /* Check whether this plane supports the fb pixel format. */ 2512 ret = drm_plane_check_pixel_format(plane, fb->pixel_format); 2513 if (ret) { 2514 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2515 drm_get_format_name(fb->pixel_format)); 2516 goto out; 2517 } 2518 2519 /* Give drivers some help against integer overflows */ 2520 if (crtc_w > INT_MAX || 2521 crtc_x > INT_MAX - (int32_t) crtc_w || 2522 crtc_h > INT_MAX || 2523 crtc_y > INT_MAX - (int32_t) crtc_h) { 2524 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2525 crtc_w, crtc_h, crtc_x, crtc_y); 2526 ret = -ERANGE; 2527 goto out; 2528 } 2529 2530 ret = check_src_coords(src_x, src_y, src_w, src_h, fb); 2531 if (ret) 2532 goto out; 2533 2534 plane->old_fb = plane->fb; 2535 ret = plane->funcs->update_plane(plane, crtc, fb, 2536 crtc_x, crtc_y, crtc_w, crtc_h, 2537 src_x, src_y, src_w, src_h); 2538 if (!ret) { 2539 plane->crtc = crtc; 2540 plane->fb = fb; 2541 fb = NULL; 2542 } else { 2543 plane->old_fb = NULL; 2544 } 2545 2546 out: 2547 if (fb) 2548 drm_framebuffer_unreference(fb); 2549 if (plane->old_fb) 2550 drm_framebuffer_unreference(plane->old_fb); 2551 plane->old_fb = NULL; 2552 2553 return ret; 2554 } 2555 2556 static int setplane_internal(struct drm_plane *plane, 2557 struct drm_crtc *crtc, 2558 struct drm_framebuffer *fb, 2559 int32_t crtc_x, int32_t crtc_y, 2560 uint32_t crtc_w, uint32_t crtc_h, 2561 /* src_{x,y,w,h} values are 16.16 fixed point */ 2562 uint32_t src_x, uint32_t src_y, 2563 uint32_t src_w, uint32_t src_h) 2564 { 2565 int ret; 2566 2567 drm_modeset_lock_all(plane->dev); 2568 ret = __setplane_internal(plane, crtc, fb, 2569 crtc_x, crtc_y, crtc_w, crtc_h, 2570 src_x, src_y, src_w, src_h); 2571 drm_modeset_unlock_all(plane->dev); 2572 2573 return ret; 2574 } 2575 2576 /** 2577 * drm_mode_setplane - configure a plane's configuration 2578 * @dev: DRM device 2579 * @data: ioctl data* 2580 * @file_priv: DRM file info 2581 * 2582 * Set plane configuration, including placement, fb, scaling, and other factors. 2583 * Or pass a NULL fb to disable (planes may be disabled without providing a 2584 * valid crtc). 2585 * 2586 * Returns: 2587 * Zero on success, negative errno on failure. 2588 */ 2589 int drm_mode_setplane(struct drm_device *dev, void *data, 2590 struct drm_file *file_priv) 2591 { 2592 struct drm_mode_set_plane *plane_req = data; 2593 struct drm_plane *plane; 2594 struct drm_crtc *crtc = NULL; 2595 struct drm_framebuffer *fb = NULL; 2596 2597 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2598 return -EINVAL; 2599 2600 /* 2601 * First, find the plane, crtc, and fb objects. If not available, 2602 * we don't bother to call the driver. 2603 */ 2604 plane = drm_plane_find(dev, plane_req->plane_id); 2605 if (!plane) { 2606 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2607 plane_req->plane_id); 2608 return -ENOENT; 2609 } 2610 2611 if (plane_req->fb_id) { 2612 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2613 if (!fb) { 2614 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2615 plane_req->fb_id); 2616 return -ENOENT; 2617 } 2618 2619 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2620 if (!crtc) { 2621 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2622 plane_req->crtc_id); 2623 return -ENOENT; 2624 } 2625 } 2626 2627 /* 2628 * setplane_internal will take care of deref'ing either the old or new 2629 * framebuffer depending on success. 2630 */ 2631 return setplane_internal(plane, crtc, fb, 2632 plane_req->crtc_x, plane_req->crtc_y, 2633 plane_req->crtc_w, plane_req->crtc_h, 2634 plane_req->src_x, plane_req->src_y, 2635 plane_req->src_w, plane_req->src_h); 2636 } 2637 2638 /** 2639 * drm_mode_set_config_internal - helper to call ->set_config 2640 * @set: modeset config to set 2641 * 2642 * This is a little helper to wrap internal calls to the ->set_config driver 2643 * interface. The only thing it adds is correct refcounting dance. 2644 * 2645 * Returns: 2646 * Zero on success, negative errno on failure. 2647 */ 2648 int drm_mode_set_config_internal(struct drm_mode_set *set) 2649 { 2650 struct drm_crtc *crtc = set->crtc; 2651 struct drm_framebuffer *fb; 2652 struct drm_crtc *tmp; 2653 int ret; 2654 2655 /* 2656 * NOTE: ->set_config can also disable other crtcs (if we steal all 2657 * connectors from it), hence we need to refcount the fbs across all 2658 * crtcs. Atomic modeset will have saner semantics ... 2659 */ 2660 drm_for_each_crtc(tmp, crtc->dev) 2661 tmp->primary->old_fb = tmp->primary->fb; 2662 2663 fb = set->fb; 2664 2665 ret = crtc->funcs->set_config(set); 2666 if (ret == 0) { 2667 crtc->primary->crtc = crtc; 2668 crtc->primary->fb = fb; 2669 } 2670 2671 drm_for_each_crtc(tmp, crtc->dev) { 2672 if (tmp->primary->fb) 2673 drm_framebuffer_reference(tmp->primary->fb); 2674 if (tmp->primary->old_fb) 2675 drm_framebuffer_unreference(tmp->primary->old_fb); 2676 tmp->primary->old_fb = NULL; 2677 } 2678 2679 return ret; 2680 } 2681 EXPORT_SYMBOL(drm_mode_set_config_internal); 2682 2683 /** 2684 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode 2685 * @mode: mode to query 2686 * @hdisplay: hdisplay value to fill in 2687 * @vdisplay: vdisplay value to fill in 2688 * 2689 * The vdisplay value will be doubled if the specified mode is a stereo mode of 2690 * the appropriate layout. 2691 */ 2692 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, 2693 int *hdisplay, int *vdisplay) 2694 { 2695 struct drm_display_mode adjusted; 2696 2697 drm_mode_copy(&adjusted, mode); 2698 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 2699 *hdisplay = adjusted.crtc_hdisplay; 2700 *vdisplay = adjusted.crtc_vdisplay; 2701 } 2702 EXPORT_SYMBOL(drm_crtc_get_hv_timing); 2703 2704 /** 2705 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2706 * CRTC viewport 2707 * @crtc: CRTC that framebuffer will be displayed on 2708 * @x: x panning 2709 * @y: y panning 2710 * @mode: mode that framebuffer will be displayed under 2711 * @fb: framebuffer to check size of 2712 */ 2713 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2714 int x, int y, 2715 const struct drm_display_mode *mode, 2716 const struct drm_framebuffer *fb) 2717 2718 { 2719 int hdisplay, vdisplay; 2720 2721 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); 2722 2723 if (crtc->state && 2724 crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) | 2725 BIT(DRM_ROTATE_270))) 2726 swap(hdisplay, vdisplay); 2727 2728 return check_src_coords(x << 16, y << 16, 2729 hdisplay << 16, vdisplay << 16, fb); 2730 } 2731 EXPORT_SYMBOL(drm_crtc_check_viewport); 2732 2733 /** 2734 * drm_mode_setcrtc - set CRTC configuration 2735 * @dev: drm device for the ioctl 2736 * @data: data pointer for the ioctl 2737 * @file_priv: drm file for the ioctl call 2738 * 2739 * Build a new CRTC configuration based on user request. 2740 * 2741 * Called by the user via ioctl. 2742 * 2743 * Returns: 2744 * Zero on success, negative errno on failure. 2745 */ 2746 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2747 struct drm_file *file_priv) 2748 { 2749 struct drm_mode_config *config = &dev->mode_config; 2750 struct drm_mode_crtc *crtc_req = data; 2751 struct drm_crtc *crtc; 2752 struct drm_connector **connector_set = NULL, *connector; 2753 struct drm_framebuffer *fb = NULL; 2754 struct drm_display_mode *mode = NULL; 2755 struct drm_mode_set set; 2756 uint32_t __user *set_connectors_ptr; 2757 int ret; 2758 int i; 2759 2760 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2761 return -EINVAL; 2762 2763 /* 2764 * Universal plane src offsets are only 16.16, prevent havoc for 2765 * drivers using universal plane code internally. 2766 */ 2767 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) 2768 return -ERANGE; 2769 2770 drm_modeset_lock_all(dev); 2771 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2772 if (!crtc) { 2773 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2774 ret = -ENOENT; 2775 goto out; 2776 } 2777 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); 2778 2779 if (crtc_req->mode_valid) { 2780 /* If we have a mode we need a framebuffer. */ 2781 /* If we pass -1, set the mode with the currently bound fb */ 2782 if (crtc_req->fb_id == -1) { 2783 if (!crtc->primary->fb) { 2784 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2785 ret = -EINVAL; 2786 goto out; 2787 } 2788 fb = crtc->primary->fb; 2789 /* Make refcounting symmetric with the lookup path. */ 2790 drm_framebuffer_reference(fb); 2791 } else { 2792 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2793 if (!fb) { 2794 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2795 crtc_req->fb_id); 2796 ret = -ENOENT; 2797 goto out; 2798 } 2799 } 2800 2801 mode = drm_mode_create(dev); 2802 if (!mode) { 2803 ret = -ENOMEM; 2804 goto out; 2805 } 2806 2807 ret = drm_mode_convert_umode(mode, &crtc_req->mode); 2808 if (ret) { 2809 DRM_DEBUG_KMS("Invalid mode\n"); 2810 goto out; 2811 } 2812 2813 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 2814 2815 /* 2816 * Check whether the primary plane supports the fb pixel format. 2817 * Drivers not implementing the universal planes API use a 2818 * default formats list provided by the DRM core which doesn't 2819 * match real hardware capabilities. Skip the check in that 2820 * case. 2821 */ 2822 if (!crtc->primary->format_default) { 2823 ret = drm_plane_check_pixel_format(crtc->primary, 2824 fb->pixel_format); 2825 if (ret) { 2826 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2827 drm_get_format_name(fb->pixel_format)); 2828 goto out; 2829 } 2830 } 2831 2832 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2833 mode, fb); 2834 if (ret) 2835 goto out; 2836 2837 } 2838 2839 if (crtc_req->count_connectors == 0 && mode) { 2840 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2841 ret = -EINVAL; 2842 goto out; 2843 } 2844 2845 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2846 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2847 crtc_req->count_connectors); 2848 ret = -EINVAL; 2849 goto out; 2850 } 2851 2852 if (crtc_req->count_connectors > 0) { 2853 u32 out_id; 2854 2855 /* Avoid unbounded kernel memory allocation */ 2856 if (crtc_req->count_connectors > config->num_connector) { 2857 ret = -EINVAL; 2858 goto out; 2859 } 2860 2861 connector_set = kmalloc(crtc_req->count_connectors * 2862 sizeof(struct drm_connector *), 2863 M_DRM, M_WAITOK); 2864 if (!connector_set) { 2865 ret = -ENOMEM; 2866 goto out; 2867 } 2868 2869 for (i = 0; i < crtc_req->count_connectors; i++) { 2870 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2871 if (get_user(out_id, &set_connectors_ptr[i])) { 2872 ret = -EFAULT; 2873 goto out; 2874 } 2875 2876 connector = drm_connector_find(dev, out_id); 2877 if (!connector) { 2878 DRM_DEBUG_KMS("Connector id %d unknown\n", 2879 out_id); 2880 ret = -ENOENT; 2881 goto out; 2882 } 2883 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2884 connector->base.id, 2885 connector->name); 2886 2887 connector_set[i] = connector; 2888 } 2889 } 2890 2891 set.crtc = crtc; 2892 set.x = crtc_req->x; 2893 set.y = crtc_req->y; 2894 set.mode = mode; 2895 set.connectors = connector_set; 2896 set.num_connectors = crtc_req->count_connectors; 2897 set.fb = fb; 2898 ret = drm_mode_set_config_internal(&set); 2899 2900 out: 2901 if (fb) 2902 drm_framebuffer_unreference(fb); 2903 2904 kfree(connector_set); 2905 drm_mode_destroy(dev, mode); 2906 drm_modeset_unlock_all(dev); 2907 return ret; 2908 } 2909 2910 /** 2911 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2912 * universal plane handler call 2913 * @crtc: crtc to update cursor for 2914 * @req: data pointer for the ioctl 2915 * @file_priv: drm file for the ioctl call 2916 * 2917 * Legacy cursor ioctl's work directly with driver buffer handles. To 2918 * translate legacy ioctl calls into universal plane handler calls, we need to 2919 * wrap the native buffer handle in a drm_framebuffer. 2920 * 2921 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2922 * buffer with a pitch of 4*width; the universal plane interface should be used 2923 * directly in cases where the hardware can support other buffer settings and 2924 * userspace wants to make use of these capabilities. 2925 * 2926 * Returns: 2927 * Zero on success, negative errno on failure. 2928 */ 2929 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2930 struct drm_mode_cursor2 *req, 2931 struct drm_file *file_priv) 2932 { 2933 struct drm_device *dev = crtc->dev; 2934 struct drm_framebuffer *fb = NULL; 2935 struct drm_mode_fb_cmd2 fbreq = { 2936 .width = req->width, 2937 .height = req->height, 2938 .pixel_format = DRM_FORMAT_ARGB8888, 2939 .pitches = { req->width * 4 }, 2940 .handles = { req->handle }, 2941 }; 2942 int32_t crtc_x, crtc_y; 2943 uint32_t crtc_w = 0, crtc_h = 0; 2944 uint32_t src_w = 0, src_h = 0; 2945 int ret = 0; 2946 2947 BUG_ON(!crtc->cursor); 2948 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2949 2950 /* 2951 * Obtain fb we'll be using (either new or existing) and take an extra 2952 * reference to it if fb != null. setplane will take care of dropping 2953 * the reference if the plane update fails. 2954 */ 2955 if (req->flags & DRM_MODE_CURSOR_BO) { 2956 if (req->handle) { 2957 fb = internal_framebuffer_create(dev, &fbreq, file_priv); 2958 if (IS_ERR(fb)) { 2959 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2960 return PTR_ERR(fb); 2961 } 2962 } else { 2963 fb = NULL; 2964 } 2965 } else { 2966 fb = crtc->cursor->fb; 2967 if (fb) 2968 drm_framebuffer_reference(fb); 2969 } 2970 2971 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2972 crtc_x = req->x; 2973 crtc_y = req->y; 2974 } else { 2975 crtc_x = crtc->cursor_x; 2976 crtc_y = crtc->cursor_y; 2977 } 2978 2979 if (fb) { 2980 crtc_w = fb->width; 2981 crtc_h = fb->height; 2982 src_w = fb->width << 16; 2983 src_h = fb->height << 16; 2984 } 2985 2986 /* 2987 * setplane_internal will take care of deref'ing either the old or new 2988 * framebuffer depending on success. 2989 */ 2990 ret = __setplane_internal(crtc->cursor, crtc, fb, 2991 crtc_x, crtc_y, crtc_w, crtc_h, 2992 0, 0, src_w, src_h); 2993 2994 /* Update successful; save new cursor position, if necessary */ 2995 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2996 crtc->cursor_x = req->x; 2997 crtc->cursor_y = req->y; 2998 } 2999 3000 return ret; 3001 } 3002 3003 static int drm_mode_cursor_common(struct drm_device *dev, 3004 struct drm_mode_cursor2 *req, 3005 struct drm_file *file_priv) 3006 { 3007 struct drm_crtc *crtc; 3008 int ret = 0; 3009 3010 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3011 return -EINVAL; 3012 3013 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 3014 return -EINVAL; 3015 3016 crtc = drm_crtc_find(dev, req->crtc_id); 3017 if (!crtc) { 3018 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 3019 return -ENOENT; 3020 } 3021 3022 /* 3023 * If this crtc has a universal cursor plane, call that plane's update 3024 * handler rather than using legacy cursor handlers. 3025 */ 3026 drm_modeset_lock_crtc(crtc, crtc->cursor); 3027 if (crtc->cursor) { 3028 ret = drm_mode_cursor_universal(crtc, req, file_priv); 3029 goto out; 3030 } 3031 3032 if (req->flags & DRM_MODE_CURSOR_BO) { 3033 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 3034 ret = -ENXIO; 3035 goto out; 3036 } 3037 /* Turns off the cursor if handle is 0 */ 3038 if (crtc->funcs->cursor_set2) 3039 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 3040 req->width, req->height, req->hot_x, req->hot_y); 3041 else 3042 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 3043 req->width, req->height); 3044 } 3045 3046 if (req->flags & DRM_MODE_CURSOR_MOVE) { 3047 if (crtc->funcs->cursor_move) { 3048 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 3049 } else { 3050 ret = -EFAULT; 3051 goto out; 3052 } 3053 } 3054 out: 3055 drm_modeset_unlock_crtc(crtc); 3056 3057 return ret; 3058 3059 } 3060 3061 3062 /** 3063 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 3064 * @dev: drm device for the ioctl 3065 * @data: data pointer for the ioctl 3066 * @file_priv: drm file for the ioctl call 3067 * 3068 * Set the cursor configuration based on user request. 3069 * 3070 * Called by the user via ioctl. 3071 * 3072 * Returns: 3073 * Zero on success, negative errno on failure. 3074 */ 3075 int drm_mode_cursor_ioctl(struct drm_device *dev, 3076 void *data, struct drm_file *file_priv) 3077 { 3078 struct drm_mode_cursor *req = data; 3079 struct drm_mode_cursor2 new_req; 3080 3081 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 3082 new_req.hot_x = new_req.hot_y = 0; 3083 3084 return drm_mode_cursor_common(dev, &new_req, file_priv); 3085 } 3086 3087 /** 3088 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 3089 * @dev: drm device for the ioctl 3090 * @data: data pointer for the ioctl 3091 * @file_priv: drm file for the ioctl call 3092 * 3093 * Set the cursor configuration based on user request. This implements the 2nd 3094 * version of the cursor ioctl, which allows userspace to additionally specify 3095 * the hotspot of the pointer. 3096 * 3097 * Called by the user via ioctl. 3098 * 3099 * Returns: 3100 * Zero on success, negative errno on failure. 3101 */ 3102 int drm_mode_cursor2_ioctl(struct drm_device *dev, 3103 void *data, struct drm_file *file_priv) 3104 { 3105 struct drm_mode_cursor2 *req = data; 3106 3107 return drm_mode_cursor_common(dev, req, file_priv); 3108 } 3109 3110 /** 3111 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 3112 * @bpp: bits per pixels 3113 * @depth: bit depth per pixel 3114 * 3115 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 3116 * Useful in fbdev emulation code, since that deals in those values. 3117 */ 3118 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 3119 { 3120 uint32_t fmt; 3121 3122 switch (bpp) { 3123 case 8: 3124 fmt = DRM_FORMAT_C8; 3125 break; 3126 case 16: 3127 if (depth == 15) 3128 fmt = DRM_FORMAT_XRGB1555; 3129 else 3130 fmt = DRM_FORMAT_RGB565; 3131 break; 3132 case 24: 3133 fmt = DRM_FORMAT_RGB888; 3134 break; 3135 case 32: 3136 if (depth == 24) 3137 fmt = DRM_FORMAT_XRGB8888; 3138 else if (depth == 30) 3139 fmt = DRM_FORMAT_XRGB2101010; 3140 else 3141 fmt = DRM_FORMAT_ARGB8888; 3142 break; 3143 default: 3144 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3145 fmt = DRM_FORMAT_XRGB8888; 3146 break; 3147 } 3148 3149 return fmt; 3150 } 3151 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3152 3153 /** 3154 * drm_mode_addfb - add an FB to the graphics configuration 3155 * @dev: drm device for the ioctl 3156 * @data: data pointer for the ioctl 3157 * @file_priv: drm file for the ioctl call 3158 * 3159 * Add a new FB to the specified CRTC, given a user request. This is the 3160 * original addfb ioctl which only supported RGB formats. 3161 * 3162 * Called by the user via ioctl. 3163 * 3164 * Returns: 3165 * Zero on success, negative errno on failure. 3166 */ 3167 int drm_mode_addfb(struct drm_device *dev, 3168 void *data, struct drm_file *file_priv) 3169 { 3170 struct drm_mode_fb_cmd *or = data; 3171 struct drm_mode_fb_cmd2 r = {}; 3172 int ret; 3173 3174 /* convert to new format and call new ioctl */ 3175 r.fb_id = or->fb_id; 3176 r.width = or->width; 3177 r.height = or->height; 3178 r.pitches[0] = or->pitch; 3179 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3180 r.handles[0] = or->handle; 3181 3182 ret = drm_mode_addfb2(dev, &r, file_priv); 3183 if (ret) 3184 return ret; 3185 3186 or->fb_id = r.fb_id; 3187 3188 return 0; 3189 } 3190 3191 static int format_check(const struct drm_mode_fb_cmd2 *r) 3192 { 3193 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3194 3195 switch (format) { 3196 case DRM_FORMAT_C8: 3197 case DRM_FORMAT_RGB332: 3198 case DRM_FORMAT_BGR233: 3199 case DRM_FORMAT_XRGB4444: 3200 case DRM_FORMAT_XBGR4444: 3201 case DRM_FORMAT_RGBX4444: 3202 case DRM_FORMAT_BGRX4444: 3203 case DRM_FORMAT_ARGB4444: 3204 case DRM_FORMAT_ABGR4444: 3205 case DRM_FORMAT_RGBA4444: 3206 case DRM_FORMAT_BGRA4444: 3207 case DRM_FORMAT_XRGB1555: 3208 case DRM_FORMAT_XBGR1555: 3209 case DRM_FORMAT_RGBX5551: 3210 case DRM_FORMAT_BGRX5551: 3211 case DRM_FORMAT_ARGB1555: 3212 case DRM_FORMAT_ABGR1555: 3213 case DRM_FORMAT_RGBA5551: 3214 case DRM_FORMAT_BGRA5551: 3215 case DRM_FORMAT_RGB565: 3216 case DRM_FORMAT_BGR565: 3217 case DRM_FORMAT_RGB888: 3218 case DRM_FORMAT_BGR888: 3219 case DRM_FORMAT_XRGB8888: 3220 case DRM_FORMAT_XBGR8888: 3221 case DRM_FORMAT_RGBX8888: 3222 case DRM_FORMAT_BGRX8888: 3223 case DRM_FORMAT_ARGB8888: 3224 case DRM_FORMAT_ABGR8888: 3225 case DRM_FORMAT_RGBA8888: 3226 case DRM_FORMAT_BGRA8888: 3227 case DRM_FORMAT_XRGB2101010: 3228 case DRM_FORMAT_XBGR2101010: 3229 case DRM_FORMAT_RGBX1010102: 3230 case DRM_FORMAT_BGRX1010102: 3231 case DRM_FORMAT_ARGB2101010: 3232 case DRM_FORMAT_ABGR2101010: 3233 case DRM_FORMAT_RGBA1010102: 3234 case DRM_FORMAT_BGRA1010102: 3235 case DRM_FORMAT_YUYV: 3236 case DRM_FORMAT_YVYU: 3237 case DRM_FORMAT_UYVY: 3238 case DRM_FORMAT_VYUY: 3239 case DRM_FORMAT_AYUV: 3240 case DRM_FORMAT_NV12: 3241 case DRM_FORMAT_NV21: 3242 case DRM_FORMAT_NV16: 3243 case DRM_FORMAT_NV61: 3244 case DRM_FORMAT_NV24: 3245 case DRM_FORMAT_NV42: 3246 case DRM_FORMAT_YUV410: 3247 case DRM_FORMAT_YVU410: 3248 case DRM_FORMAT_YUV411: 3249 case DRM_FORMAT_YVU411: 3250 case DRM_FORMAT_YUV420: 3251 case DRM_FORMAT_YVU420: 3252 case DRM_FORMAT_YUV422: 3253 case DRM_FORMAT_YVU422: 3254 case DRM_FORMAT_YUV444: 3255 case DRM_FORMAT_YVU444: 3256 return 0; 3257 default: 3258 DRM_DEBUG_KMS("invalid pixel format %s\n", 3259 drm_get_format_name(r->pixel_format)); 3260 return -EINVAL; 3261 } 3262 } 3263 3264 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3265 { 3266 int ret, hsub, vsub, num_planes, i; 3267 3268 ret = format_check(r); 3269 if (ret) { 3270 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3271 drm_get_format_name(r->pixel_format)); 3272 return ret; 3273 } 3274 3275 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3276 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3277 num_planes = drm_format_num_planes(r->pixel_format); 3278 3279 if (r->width == 0 || r->width % hsub) { 3280 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3281 return -EINVAL; 3282 } 3283 3284 if (r->height == 0 || r->height % vsub) { 3285 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3286 return -EINVAL; 3287 } 3288 3289 for (i = 0; i < num_planes; i++) { 3290 unsigned int width = r->width / (i != 0 ? hsub : 1); 3291 unsigned int height = r->height / (i != 0 ? vsub : 1); 3292 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3293 3294 if (!r->handles[i]) { 3295 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3296 return -EINVAL; 3297 } 3298 3299 if ((uint64_t) width * cpp > UINT_MAX) 3300 return -ERANGE; 3301 3302 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3303 return -ERANGE; 3304 3305 if (r->pitches[i] < width * cpp) { 3306 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3307 return -EINVAL; 3308 } 3309 3310 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { 3311 DRM_DEBUG_KMS("bad fb modifier %lu for plane %d\n", 3312 r->modifier[i], i); 3313 return -EINVAL; 3314 } 3315 3316 /* modifier specific checks: */ 3317 switch (r->modifier[i]) { 3318 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: 3319 /* NOTE: the pitch restriction may be lifted later if it turns 3320 * out that no hw has this restriction: 3321 */ 3322 if (r->pixel_format != DRM_FORMAT_NV12 || 3323 width % 128 || height % 32 || 3324 r->pitches[i] % 128) { 3325 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i); 3326 return -EINVAL; 3327 } 3328 break; 3329 3330 default: 3331 break; 3332 } 3333 } 3334 3335 for (i = num_planes; i < 4; i++) { 3336 if (r->modifier[i]) { 3337 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i); 3338 return -EINVAL; 3339 } 3340 3341 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ 3342 if (!(r->flags & DRM_MODE_FB_MODIFIERS)) 3343 continue; 3344 3345 if (r->handles[i]) { 3346 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i); 3347 return -EINVAL; 3348 } 3349 3350 if (r->pitches[i]) { 3351 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i); 3352 return -EINVAL; 3353 } 3354 3355 if (r->offsets[i]) { 3356 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i); 3357 return -EINVAL; 3358 } 3359 } 3360 3361 return 0; 3362 } 3363 3364 static struct drm_framebuffer * 3365 internal_framebuffer_create(struct drm_device *dev, 3366 const struct drm_mode_fb_cmd2 *r, 3367 struct drm_file *file_priv) 3368 { 3369 struct drm_mode_config *config = &dev->mode_config; 3370 struct drm_framebuffer *fb; 3371 int ret; 3372 3373 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { 3374 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3375 return ERR_PTR(-EINVAL); 3376 } 3377 3378 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3379 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3380 r->width, config->min_width, config->max_width); 3381 return ERR_PTR(-EINVAL); 3382 } 3383 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3384 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3385 r->height, config->min_height, config->max_height); 3386 return ERR_PTR(-EINVAL); 3387 } 3388 3389 if (r->flags & DRM_MODE_FB_MODIFIERS && 3390 !dev->mode_config.allow_fb_modifiers) { 3391 DRM_DEBUG_KMS("driver does not support fb modifiers\n"); 3392 return ERR_PTR(-EINVAL); 3393 } 3394 3395 ret = framebuffer_check(r); 3396 if (ret) 3397 return ERR_PTR(ret); 3398 3399 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3400 if (IS_ERR(fb)) { 3401 DRM_DEBUG_KMS("could not create framebuffer\n"); 3402 return fb; 3403 } 3404 3405 return fb; 3406 } 3407 3408 /** 3409 * drm_mode_addfb2 - add an FB to the graphics configuration 3410 * @dev: drm device for the ioctl 3411 * @data: data pointer for the ioctl 3412 * @file_priv: drm file for the ioctl call 3413 * 3414 * Add a new FB to the specified CRTC, given a user request with format. This is 3415 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3416 * and uses fourcc codes as pixel format specifiers. 3417 * 3418 * Called by the user via ioctl. 3419 * 3420 * Returns: 3421 * Zero on success, negative errno on failure. 3422 */ 3423 int drm_mode_addfb2(struct drm_device *dev, 3424 void *data, struct drm_file *file_priv) 3425 { 3426 struct drm_mode_fb_cmd2 *r = data; 3427 struct drm_framebuffer *fb; 3428 3429 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3430 return -EINVAL; 3431 3432 fb = internal_framebuffer_create(dev, r, file_priv); 3433 if (IS_ERR(fb)) 3434 return PTR_ERR(fb); 3435 3436 /* Transfer ownership to the filp for reaping on close */ 3437 3438 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3439 mutex_lock(&file_priv->fbs_lock); 3440 r->fb_id = fb->base.id; 3441 list_add(&fb->filp_head, &file_priv->fbs); 3442 mutex_unlock(&file_priv->fbs_lock); 3443 3444 return 0; 3445 } 3446 3447 /** 3448 * drm_mode_rmfb - remove an FB from the configuration 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 * Remove the FB specified by the user. 3454 * 3455 * Called by the user via ioctl. 3456 * 3457 * Returns: 3458 * Zero on success, negative errno on failure. 3459 */ 3460 int drm_mode_rmfb(struct drm_device *dev, 3461 void *data, struct drm_file *file_priv) 3462 { 3463 struct drm_framebuffer *fb = NULL; 3464 struct drm_framebuffer *fbl = NULL; 3465 uint32_t *id = data; 3466 int found = 0; 3467 3468 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3469 return -EINVAL; 3470 3471 mutex_lock(&file_priv->fbs_lock); 3472 mutex_lock(&dev->mode_config.fb_lock); 3473 fb = __drm_framebuffer_lookup(dev, *id); 3474 if (!fb) 3475 goto fail_lookup; 3476 3477 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3478 if (fb == fbl) 3479 found = 1; 3480 if (!found) 3481 goto fail_lookup; 3482 3483 list_del_init(&fb->filp_head); 3484 mutex_unlock(&dev->mode_config.fb_lock); 3485 mutex_unlock(&file_priv->fbs_lock); 3486 3487 drm_framebuffer_unreference(fb); 3488 3489 return 0; 3490 3491 fail_lookup: 3492 mutex_unlock(&dev->mode_config.fb_lock); 3493 mutex_unlock(&file_priv->fbs_lock); 3494 3495 return -ENOENT; 3496 } 3497 3498 /** 3499 * drm_mode_getfb - get FB info 3500 * @dev: drm device for the ioctl 3501 * @data: data pointer for the ioctl 3502 * @file_priv: drm file for the ioctl call 3503 * 3504 * Lookup the FB given its ID and return info about it. 3505 * 3506 * Called by the user via ioctl. 3507 * 3508 * Returns: 3509 * Zero on success, negative errno on failure. 3510 */ 3511 int drm_mode_getfb(struct drm_device *dev, 3512 void *data, struct drm_file *file_priv) 3513 { 3514 struct drm_mode_fb_cmd *r = data; 3515 struct drm_framebuffer *fb; 3516 int ret; 3517 3518 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3519 return -EINVAL; 3520 3521 fb = drm_framebuffer_lookup(dev, r->fb_id); 3522 if (!fb) 3523 return -ENOENT; 3524 3525 r->height = fb->height; 3526 r->width = fb->width; 3527 r->depth = fb->depth; 3528 r->bpp = fb->bits_per_pixel; 3529 r->pitch = fb->pitches[0]; 3530 if (fb->funcs->create_handle) { 3531 ret = fb->funcs->create_handle(fb, file_priv, &r->handle); 3532 } else { 3533 ret = -ENODEV; 3534 } 3535 3536 drm_framebuffer_unreference(fb); 3537 3538 return ret; 3539 } 3540 3541 /** 3542 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3543 * @dev: drm device for the ioctl 3544 * @data: data pointer for the ioctl 3545 * @file_priv: drm file for the ioctl call 3546 * 3547 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3548 * rectangle list. Generic userspace which does frontbuffer rendering must call 3549 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3550 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3551 * 3552 * Modesetting drivers which always update the frontbuffer do not need to 3553 * implement the corresponding ->dirty framebuffer callback. 3554 * 3555 * Called by the user via ioctl. 3556 * 3557 * Returns: 3558 * Zero on success, negative errno on failure. 3559 */ 3560 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3561 void *data, struct drm_file *file_priv) 3562 { 3563 struct drm_clip_rect __user *clips_ptr; 3564 struct drm_clip_rect *clips = NULL; 3565 struct drm_mode_fb_dirty_cmd *r = data; 3566 struct drm_framebuffer *fb; 3567 unsigned flags; 3568 int num_clips; 3569 int ret; 3570 3571 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3572 return -EINVAL; 3573 3574 fb = drm_framebuffer_lookup(dev, r->fb_id); 3575 if (!fb) 3576 return -ENOENT; 3577 3578 num_clips = r->num_clips; 3579 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3580 3581 if (!num_clips != !clips_ptr) { 3582 ret = -EINVAL; 3583 goto out_err1; 3584 } 3585 3586 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3587 3588 /* If userspace annotates copy, clips must come in pairs */ 3589 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3590 ret = -EINVAL; 3591 goto out_err1; 3592 } 3593 3594 if (num_clips && clips_ptr) { 3595 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3596 ret = -EINVAL; 3597 goto out_err1; 3598 } 3599 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); 3600 if (!clips) { 3601 ret = -ENOMEM; 3602 goto out_err1; 3603 } 3604 3605 ret = copy_from_user(clips, clips_ptr, 3606 num_clips * sizeof(*clips)); 3607 if (ret) { 3608 ret = -EFAULT; 3609 goto out_err2; 3610 } 3611 } 3612 3613 if (fb->funcs->dirty) { 3614 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3615 clips, num_clips); 3616 } else { 3617 ret = -ENOSYS; 3618 } 3619 3620 out_err2: 3621 kfree(clips); 3622 out_err1: 3623 drm_framebuffer_unreference(fb); 3624 3625 return ret; 3626 } 3627 3628 3629 /** 3630 * drm_fb_release - remove and free the FBs on this file 3631 * @priv: drm file for the ioctl 3632 * 3633 * Destroy all the FBs associated with @filp. 3634 * 3635 * Called by the user via ioctl. 3636 * 3637 * Returns: 3638 * Zero on success, negative errno on failure. 3639 */ 3640 void drm_fb_release(struct drm_file *priv) 3641 { 3642 struct drm_framebuffer *fb, *tfb; 3643 3644 /* 3645 * When the file gets released that means no one else can access the fb 3646 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3647 * avoid upsetting lockdep since the universal cursor code adds a 3648 * framebuffer while holding mutex locks. 3649 * 3650 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3651 * locks is impossible here since no one else but this function can get 3652 * at it any more. 3653 */ 3654 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3655 list_del_init(&fb->filp_head); 3656 3657 /* This drops the fpriv->fbs reference. */ 3658 drm_framebuffer_unreference(fb); 3659 } 3660 } 3661 3662 /** 3663 * drm_property_create - create a new property type 3664 * @dev: drm device 3665 * @flags: flags specifying the property type 3666 * @name: name of the property 3667 * @num_values: number of pre-defined values 3668 * 3669 * This creates a new generic drm property which can then be attached to a drm 3670 * object with drm_object_attach_property. The returned property object must be 3671 * freed with drm_property_destroy. 3672 * 3673 * Note that the DRM core keeps a per-device list of properties and that, if 3674 * drm_mode_config_cleanup() is called, it will destroy all properties created 3675 * by the driver. 3676 * 3677 * Returns: 3678 * A pointer to the newly created property on success, NULL on failure. 3679 */ 3680 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3681 const char *name, int num_values) 3682 { 3683 struct drm_property *property = NULL; 3684 int ret; 3685 3686 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3687 if (!property) 3688 return NULL; 3689 3690 property->dev = dev; 3691 3692 if (num_values) { 3693 property->values = kcalloc(num_values, sizeof(uint64_t), 3694 GFP_KERNEL); 3695 if (!property->values) 3696 goto fail; 3697 } 3698 3699 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3700 if (ret) 3701 goto fail; 3702 3703 property->flags = flags; 3704 property->num_values = num_values; 3705 INIT_LIST_HEAD(&property->enum_list); 3706 3707 if (name) { 3708 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3709 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3710 } 3711 3712 list_add_tail(&property->head, &dev->mode_config.property_list); 3713 3714 WARN_ON(!drm_property_type_valid(property)); 3715 3716 return property; 3717 fail: 3718 kfree(property->values); 3719 kfree(property); 3720 return NULL; 3721 } 3722 EXPORT_SYMBOL(drm_property_create); 3723 3724 /** 3725 * drm_property_create_enum - create a new enumeration property type 3726 * @dev: drm device 3727 * @flags: flags specifying the property type 3728 * @name: name of the property 3729 * @props: enumeration lists with property values 3730 * @num_values: number of pre-defined values 3731 * 3732 * This creates a new generic drm property which can then be attached to a drm 3733 * object with drm_object_attach_property. The returned property object must be 3734 * freed with drm_property_destroy. 3735 * 3736 * Userspace is only allowed to set one of the predefined values for enumeration 3737 * properties. 3738 * 3739 * Returns: 3740 * A pointer to the newly created property on success, NULL on failure. 3741 */ 3742 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3743 const char *name, 3744 const struct drm_prop_enum_list *props, 3745 int num_values) 3746 { 3747 struct drm_property *property; 3748 int i, ret; 3749 3750 flags |= DRM_MODE_PROP_ENUM; 3751 3752 property = drm_property_create(dev, flags, name, num_values); 3753 if (!property) 3754 return NULL; 3755 3756 for (i = 0; i < num_values; i++) { 3757 ret = drm_property_add_enum(property, i, 3758 props[i].type, 3759 props[i].name); 3760 if (ret) { 3761 drm_property_destroy(dev, property); 3762 return NULL; 3763 } 3764 } 3765 3766 return property; 3767 } 3768 EXPORT_SYMBOL(drm_property_create_enum); 3769 3770 /** 3771 * drm_property_create_bitmask - create a new bitmask property type 3772 * @dev: drm device 3773 * @flags: flags specifying the property type 3774 * @name: name of the property 3775 * @props: enumeration lists with property bitflags 3776 * @num_props: size of the @props array 3777 * @supported_bits: bitmask of all supported enumeration values 3778 * 3779 * This creates a new bitmask drm property which can then be attached to a drm 3780 * object with drm_object_attach_property. The returned property object must be 3781 * freed with drm_property_destroy. 3782 * 3783 * Compared to plain enumeration properties userspace is allowed to set any 3784 * or'ed together combination of the predefined property bitflag values 3785 * 3786 * Returns: 3787 * A pointer to the newly created property on success, NULL on failure. 3788 */ 3789 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3790 int flags, const char *name, 3791 const struct drm_prop_enum_list *props, 3792 int num_props, 3793 uint64_t supported_bits) 3794 { 3795 struct drm_property *property; 3796 int i, ret, index = 0; 3797 int num_values = hweight64(supported_bits); 3798 3799 flags |= DRM_MODE_PROP_BITMASK; 3800 3801 property = drm_property_create(dev, flags, name, num_values); 3802 if (!property) 3803 return NULL; 3804 for (i = 0; i < num_props; i++) { 3805 if (!(supported_bits & (1ULL << props[i].type))) 3806 continue; 3807 3808 if (WARN_ON(index >= num_values)) { 3809 drm_property_destroy(dev, property); 3810 return NULL; 3811 } 3812 3813 ret = drm_property_add_enum(property, index++, 3814 props[i].type, 3815 props[i].name); 3816 if (ret) { 3817 drm_property_destroy(dev, property); 3818 return NULL; 3819 } 3820 } 3821 3822 return property; 3823 } 3824 EXPORT_SYMBOL(drm_property_create_bitmask); 3825 3826 static struct drm_property *property_create_range(struct drm_device *dev, 3827 int flags, const char *name, 3828 uint64_t min, uint64_t max) 3829 { 3830 struct drm_property *property; 3831 3832 property = drm_property_create(dev, flags, name, 2); 3833 if (!property) 3834 return NULL; 3835 3836 property->values[0] = min; 3837 property->values[1] = max; 3838 3839 return property; 3840 } 3841 3842 /** 3843 * drm_property_create_range - create a new unsigned ranged property type 3844 * @dev: drm device 3845 * @flags: flags specifying the property type 3846 * @name: name of the property 3847 * @min: minimum value of the property 3848 * @max: maximum value of the property 3849 * 3850 * This creates a new generic drm property which can then be attached to a drm 3851 * object with drm_object_attach_property. The returned property object must be 3852 * freed with drm_property_destroy. 3853 * 3854 * Userspace is allowed to set any unsigned integer value in the (min, max) 3855 * range inclusive. 3856 * 3857 * Returns: 3858 * A pointer to the newly created property on success, NULL on failure. 3859 */ 3860 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3861 const char *name, 3862 uint64_t min, uint64_t max) 3863 { 3864 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3865 name, min, max); 3866 } 3867 EXPORT_SYMBOL(drm_property_create_range); 3868 3869 /** 3870 * drm_property_create_signed_range - create a new signed ranged property type 3871 * @dev: drm device 3872 * @flags: flags specifying the property type 3873 * @name: name of the property 3874 * @min: minimum value of the property 3875 * @max: maximum value of the property 3876 * 3877 * This creates a new generic drm property which can then be attached to a drm 3878 * object with drm_object_attach_property. The returned property object must be 3879 * freed with drm_property_destroy. 3880 * 3881 * Userspace is allowed to set any signed integer value in the (min, max) 3882 * range inclusive. 3883 * 3884 * Returns: 3885 * A pointer to the newly created property on success, NULL on failure. 3886 */ 3887 struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3888 int flags, const char *name, 3889 int64_t min, int64_t max) 3890 { 3891 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3892 name, I642U64(min), I642U64(max)); 3893 } 3894 EXPORT_SYMBOL(drm_property_create_signed_range); 3895 3896 /** 3897 * drm_property_create_object - create a new object property type 3898 * @dev: drm device 3899 * @flags: flags specifying the property type 3900 * @name: name of the property 3901 * @type: object type from DRM_MODE_OBJECT_* defines 3902 * 3903 * This creates a new generic drm property which can then be attached to a drm 3904 * object with drm_object_attach_property. The returned property object must be 3905 * freed with drm_property_destroy. 3906 * 3907 * Userspace is only allowed to set this to any property value of the given 3908 * @type. Only useful for atomic properties, which is enforced. 3909 * 3910 * Returns: 3911 * A pointer to the newly created property on success, NULL on failure. 3912 */ 3913 struct drm_property *drm_property_create_object(struct drm_device *dev, 3914 int flags, const char *name, uint32_t type) 3915 { 3916 struct drm_property *property; 3917 3918 flags |= DRM_MODE_PROP_OBJECT; 3919 3920 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) 3921 return NULL; 3922 3923 property = drm_property_create(dev, flags, name, 1); 3924 if (!property) 3925 return NULL; 3926 3927 property->values[0] = type; 3928 3929 return property; 3930 } 3931 EXPORT_SYMBOL(drm_property_create_object); 3932 3933 /** 3934 * drm_property_create_bool - create a new boolean property type 3935 * @dev: drm device 3936 * @flags: flags specifying the property type 3937 * @name: name of the property 3938 * 3939 * This creates a new generic drm property which can then be attached to a drm 3940 * object with drm_object_attach_property. The returned property object must be 3941 * freed with drm_property_destroy. 3942 * 3943 * This is implemented as a ranged property with only {0, 1} as valid values. 3944 * 3945 * Returns: 3946 * A pointer to the newly created property on success, NULL on failure. 3947 */ 3948 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, 3949 const char *name) 3950 { 3951 return drm_property_create_range(dev, flags, name, 0, 1); 3952 } 3953 EXPORT_SYMBOL(drm_property_create_bool); 3954 3955 /** 3956 * drm_property_add_enum - add a possible value to an enumeration property 3957 * @property: enumeration property to change 3958 * @index: index of the new enumeration 3959 * @value: value of the new enumeration 3960 * @name: symbolic name of the new enumeration 3961 * 3962 * This functions adds enumerations to a property. 3963 * 3964 * It's use is deprecated, drivers should use one of the more specific helpers 3965 * to directly create the property with all enumerations already attached. 3966 * 3967 * Returns: 3968 * Zero on success, error code on failure. 3969 */ 3970 int drm_property_add_enum(struct drm_property *property, int index, 3971 uint64_t value, const char *name) 3972 { 3973 struct drm_property_enum *prop_enum; 3974 3975 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3976 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3977 return -EINVAL; 3978 3979 /* 3980 * Bitmask enum properties have the additional constraint of values 3981 * from 0 to 63 3982 */ 3983 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3984 (value > 63)) 3985 return -EINVAL; 3986 3987 if (!list_empty(&property->enum_list)) { 3988 list_for_each_entry(prop_enum, &property->enum_list, head) { 3989 if (prop_enum->value == value) { 3990 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3991 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3992 return 0; 3993 } 3994 } 3995 } 3996 3997 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3998 if (!prop_enum) 3999 return -ENOMEM; 4000 4001 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 4002 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 4003 prop_enum->value = value; 4004 4005 property->values[index] = value; 4006 list_add_tail(&prop_enum->head, &property->enum_list); 4007 return 0; 4008 } 4009 EXPORT_SYMBOL(drm_property_add_enum); 4010 4011 /** 4012 * drm_property_destroy - destroy a drm property 4013 * @dev: drm device 4014 * @property: property to destry 4015 * 4016 * This function frees a property including any attached resources like 4017 * enumeration values. 4018 */ 4019 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 4020 { 4021 struct drm_property_enum *prop_enum, *pt; 4022 4023 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 4024 list_del(&prop_enum->head); 4025 kfree(prop_enum); 4026 } 4027 4028 if (property->num_values) 4029 kfree(property->values); 4030 drm_mode_object_put(dev, &property->base); 4031 list_del(&property->head); 4032 kfree(property); 4033 } 4034 EXPORT_SYMBOL(drm_property_destroy); 4035 4036 /** 4037 * drm_object_attach_property - attach a property to a modeset object 4038 * @obj: drm modeset object 4039 * @property: property to attach 4040 * @init_val: initial value of the property 4041 * 4042 * This attaches the given property to the modeset object with the given initial 4043 * value. Currently this function cannot fail since the properties are stored in 4044 * a statically sized array. 4045 */ 4046 void drm_object_attach_property(struct drm_mode_object *obj, 4047 struct drm_property *property, 4048 uint64_t init_val) 4049 { 4050 int count = obj->properties->count; 4051 4052 if (count == DRM_OBJECT_MAX_PROPERTY) { 4053 WARN(1, "Failed to attach object property (type: 0x%x). Please " 4054 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 4055 "you see this message on the same object type.\n", 4056 obj->type); 4057 return; 4058 } 4059 4060 obj->properties->properties[count] = property; 4061 obj->properties->values[count] = init_val; 4062 obj->properties->count++; 4063 if (property->flags & DRM_MODE_PROP_ATOMIC) 4064 obj->properties->atomic_count++; 4065 } 4066 EXPORT_SYMBOL(drm_object_attach_property); 4067 4068 /** 4069 * drm_object_property_set_value - set the value of a property 4070 * @obj: drm mode object to set property value for 4071 * @property: property to set 4072 * @val: value the property should be set to 4073 * 4074 * This functions sets a given property on a given object. This function only 4075 * changes the software state of the property, it does not call into the 4076 * driver's ->set_property callback. 4077 * 4078 * Returns: 4079 * Zero on success, error code on failure. 4080 */ 4081 int drm_object_property_set_value(struct drm_mode_object *obj, 4082 struct drm_property *property, uint64_t val) 4083 { 4084 int i; 4085 4086 for (i = 0; i < obj->properties->count; i++) { 4087 if (obj->properties->properties[i] == property) { 4088 obj->properties->values[i] = val; 4089 return 0; 4090 } 4091 } 4092 4093 return -EINVAL; 4094 } 4095 EXPORT_SYMBOL(drm_object_property_set_value); 4096 4097 /** 4098 * drm_object_property_get_value - retrieve the value of a property 4099 * @obj: drm mode object to get property value from 4100 * @property: property to retrieve 4101 * @val: storage for the property value 4102 * 4103 * This function retrieves the softare state of the given property for the given 4104 * property. Since there is no driver callback to retrieve the current property 4105 * value this might be out of sync with the hardware, depending upon the driver 4106 * and property. 4107 * 4108 * Returns: 4109 * Zero on success, error code on failure. 4110 */ 4111 int drm_object_property_get_value(struct drm_mode_object *obj, 4112 struct drm_property *property, uint64_t *val) 4113 { 4114 int i; 4115 4116 /* read-only properties bypass atomic mechanism and still store 4117 * their value in obj->properties->values[].. mostly to avoid 4118 * having to deal w/ EDID and similar props in atomic paths: 4119 */ 4120 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && 4121 !(property->flags & DRM_MODE_PROP_IMMUTABLE)) 4122 return drm_atomic_get_property(obj, property, val); 4123 4124 for (i = 0; i < obj->properties->count; i++) { 4125 if (obj->properties->properties[i] == property) { 4126 *val = obj->properties->values[i]; 4127 return 0; 4128 } 4129 } 4130 4131 return -EINVAL; 4132 } 4133 EXPORT_SYMBOL(drm_object_property_get_value); 4134 4135 /** 4136 * drm_mode_getproperty_ioctl - get the property metadata 4137 * @dev: DRM device 4138 * @data: ioctl data 4139 * @file_priv: DRM file info 4140 * 4141 * This function retrieves the metadata for a given property, like the different 4142 * possible values for an enum property or the limits for a range property. 4143 * 4144 * Blob properties are special 4145 * 4146 * Called by the user via ioctl. 4147 * 4148 * Returns: 4149 * Zero on success, negative errno on failure. 4150 */ 4151 int drm_mode_getproperty_ioctl(struct drm_device *dev, 4152 void *data, struct drm_file *file_priv) 4153 { 4154 struct drm_mode_get_property *out_resp = data; 4155 struct drm_property *property; 4156 int enum_count = 0; 4157 int value_count = 0; 4158 int ret = 0, i; 4159 int copied; 4160 struct drm_property_enum *prop_enum; 4161 struct drm_mode_property_enum __user *enum_ptr; 4162 uint64_t __user *values_ptr; 4163 4164 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4165 return -EINVAL; 4166 4167 drm_modeset_lock_all(dev); 4168 property = drm_property_find(dev, out_resp->prop_id); 4169 if (!property) { 4170 ret = -ENOENT; 4171 goto done; 4172 } 4173 4174 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4175 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4176 list_for_each_entry(prop_enum, &property->enum_list, head) 4177 enum_count++; 4178 } 4179 4180 value_count = property->num_values; 4181 4182 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 4183 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 4184 out_resp->flags = property->flags; 4185 4186 if ((out_resp->count_values >= value_count) && value_count) { 4187 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 4188 for (i = 0; i < value_count; i++) { 4189 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 4190 ret = -EFAULT; 4191 goto done; 4192 } 4193 } 4194 } 4195 out_resp->count_values = value_count; 4196 4197 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4198 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4199 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 4200 copied = 0; 4201 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 4202 list_for_each_entry(prop_enum, &property->enum_list, head) { 4203 4204 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 4205 ret = -EFAULT; 4206 goto done; 4207 } 4208 4209 if (copy_to_user(&enum_ptr[copied].name, 4210 &prop_enum->name, DRM_PROP_NAME_LEN)) { 4211 ret = -EFAULT; 4212 goto done; 4213 } 4214 copied++; 4215 } 4216 } 4217 out_resp->count_enum_blobs = enum_count; 4218 } 4219 4220 /* 4221 * NOTE: The idea seems to have been to use this to read all the blob 4222 * property values. But nothing ever added them to the corresponding 4223 * list, userspace always used the special-purpose get_blob ioctl to 4224 * read the value for a blob property. It also doesn't make a lot of 4225 * sense to return values here when everything else is just metadata for 4226 * the property itself. 4227 */ 4228 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4229 out_resp->count_enum_blobs = 0; 4230 done: 4231 drm_modeset_unlock_all(dev); 4232 return ret; 4233 } 4234 4235 /** 4236 * drm_property_create_blob - Create new blob property 4237 * 4238 * Creates a new blob property for a specified DRM device, optionally 4239 * copying data. 4240 * 4241 * @dev: DRM device to create property for 4242 * @length: Length to allocate for blob data 4243 * @data: If specified, copies data into blob 4244 * 4245 * Returns: 4246 * New blob property with a single reference on success, or an ERR_PTR 4247 * value on failure. 4248 */ 4249 struct drm_property_blob * 4250 drm_property_create_blob(struct drm_device *dev, size_t length, 4251 const void *data) 4252 { 4253 struct drm_property_blob *blob; 4254 int ret; 4255 4256 if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob)) 4257 return ERR_PTR(-EINVAL); 4258 4259 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4260 if (!blob) 4261 return ERR_PTR(-ENOMEM); 4262 4263 /* This must be explicitly initialised, so we can safely call list_del 4264 * on it in the removal handler, even if it isn't in a file list. */ 4265 INIT_LIST_HEAD(&blob->head_file); 4266 blob->length = length; 4267 blob->dev = dev; 4268 4269 if (data) 4270 memcpy(blob->data, data, length); 4271 4272 mutex_lock(&dev->mode_config.blob_lock); 4273 4274 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 4275 if (ret) { 4276 kfree(blob); 4277 mutex_unlock(&dev->mode_config.blob_lock); 4278 return ERR_PTR(-EINVAL); 4279 } 4280 4281 kref_init(&blob->refcount); 4282 4283 list_add_tail(&blob->head_global, 4284 &dev->mode_config.property_blob_list); 4285 4286 mutex_unlock(&dev->mode_config.blob_lock); 4287 4288 return blob; 4289 } 4290 EXPORT_SYMBOL(drm_property_create_blob); 4291 4292 /** 4293 * drm_property_free_blob - Blob property destructor 4294 * 4295 * Internal free function for blob properties; must not be used directly. 4296 * 4297 * @kref: Reference 4298 */ 4299 static void drm_property_free_blob(struct kref *kref) 4300 { 4301 struct drm_property_blob *blob = 4302 container_of(kref, struct drm_property_blob, refcount); 4303 4304 WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock)); 4305 4306 list_del(&blob->head_global); 4307 list_del(&blob->head_file); 4308 drm_mode_object_put(blob->dev, &blob->base); 4309 4310 kfree(blob); 4311 } 4312 4313 /** 4314 * drm_property_unreference_blob - Unreference a blob property 4315 * 4316 * Drop a reference on a blob property. May free the object. 4317 * 4318 * @blob: Pointer to blob property 4319 */ 4320 void drm_property_unreference_blob(struct drm_property_blob *blob) 4321 { 4322 struct drm_device *dev; 4323 4324 if (!blob) 4325 return; 4326 4327 dev = blob->dev; 4328 4329 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4330 4331 if (kref_put_mutex(&blob->refcount, drm_property_free_blob, 4332 &dev->mode_config.blob_lock)) 4333 mutex_unlock(&dev->mode_config.blob_lock); 4334 else 4335 might_lock(&dev->mode_config.blob_lock); 4336 } 4337 EXPORT_SYMBOL(drm_property_unreference_blob); 4338 4339 /** 4340 * drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held 4341 * 4342 * Drop a reference on a blob property. May free the object. This must be 4343 * called with blob_lock held. 4344 * 4345 * @blob: Pointer to blob property 4346 */ 4347 static void drm_property_unreference_blob_locked(struct drm_property_blob *blob) 4348 { 4349 if (!blob) 4350 return; 4351 4352 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4353 4354 kref_put(&blob->refcount, drm_property_free_blob); 4355 } 4356 4357 /** 4358 * drm_property_destroy_user_blobs - destroy all blobs created by this client 4359 * @dev: DRM device 4360 * @file_priv: destroy all blobs owned by this file handle 4361 */ 4362 void drm_property_destroy_user_blobs(struct drm_device *dev, 4363 struct drm_file *file_priv) 4364 { 4365 struct drm_property_blob *blob, *bt; 4366 4367 mutex_lock(&dev->mode_config.blob_lock); 4368 4369 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) { 4370 list_del_init(&blob->head_file); 4371 drm_property_unreference_blob_locked(blob); 4372 } 4373 4374 mutex_unlock(&dev->mode_config.blob_lock); 4375 } 4376 4377 /** 4378 * drm_property_reference_blob - Take a reference on an existing property 4379 * 4380 * Take a new reference on an existing blob property. 4381 * 4382 * @blob: Pointer to blob property 4383 */ 4384 struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob) 4385 { 4386 DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount)); 4387 kref_get(&blob->refcount); 4388 return blob; 4389 } 4390 EXPORT_SYMBOL(drm_property_reference_blob); 4391 4392 /* 4393 * Like drm_property_lookup_blob, but does not return an additional reference. 4394 * Must be called with blob_lock held. 4395 */ 4396 static struct drm_property_blob *__drm_property_lookup_blob(struct drm_device *dev, 4397 uint32_t id) 4398 { 4399 struct drm_mode_object *obj = NULL; 4400 struct drm_property_blob *blob; 4401 4402 WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock)); 4403 4404 mutex_lock(&dev->mode_config.idr_mutex); 4405 obj = idr_find(&dev->mode_config.crtc_idr, id); 4406 if (!obj || (obj->type != DRM_MODE_OBJECT_BLOB) || (obj->id != id)) 4407 blob = NULL; 4408 else 4409 blob = obj_to_blob(obj); 4410 mutex_unlock(&dev->mode_config.idr_mutex); 4411 4412 return blob; 4413 } 4414 4415 /** 4416 * drm_property_lookup_blob - look up a blob property and take a reference 4417 * @dev: drm device 4418 * @id: id of the blob property 4419 * 4420 * If successful, this takes an additional reference to the blob property. 4421 * callers need to make sure to eventually unreference the returned property 4422 * again, using @drm_property_unreference_blob. 4423 */ 4424 struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev, 4425 uint32_t id) 4426 { 4427 struct drm_property_blob *blob; 4428 4429 mutex_lock(&dev->mode_config.blob_lock); 4430 blob = __drm_property_lookup_blob(dev, id); 4431 if (blob) { 4432 if (!kref_get_unless_zero(&blob->refcount)) 4433 blob = NULL; 4434 } 4435 mutex_unlock(&dev->mode_config.blob_lock); 4436 4437 return blob; 4438 } 4439 EXPORT_SYMBOL(drm_property_lookup_blob); 4440 4441 /** 4442 * drm_property_replace_global_blob - atomically replace existing blob property 4443 * @dev: drm device 4444 * @replace: location of blob property pointer to be replaced 4445 * @length: length of data for new blob, or 0 for no data 4446 * @data: content for new blob, or NULL for no data 4447 * @obj_holds_id: optional object for property holding blob ID 4448 * @prop_holds_id: optional property holding blob ID 4449 * @return 0 on success or error on failure 4450 * 4451 * This function will atomically replace a global property in the blob list, 4452 * optionally updating a property which holds the ID of that property. It is 4453 * guaranteed to be atomic: no caller will be allowed to see intermediate 4454 * results, and either the entire operation will succeed and clean up the 4455 * previous property, or it will fail and the state will be unchanged. 4456 * 4457 * If length is 0 or data is NULL, no new blob will be created, and the holding 4458 * property, if specified, will be set to 0. 4459 * 4460 * Access to the replace pointer is assumed to be protected by the caller, e.g. 4461 * by holding the relevant modesetting object lock for its parent. 4462 * 4463 * For example, a drm_connector has a 'PATH' property, which contains the ID 4464 * of a blob property with the value of the MST path information. Calling this 4465 * function with replace pointing to the connector's path_blob_ptr, length and 4466 * data set for the new path information, obj_holds_id set to the connector's 4467 * base object, and prop_holds_id set to the path property name, will perform 4468 * a completely atomic update. The access to path_blob_ptr is protected by the 4469 * caller holding a lock on the connector. 4470 */ 4471 static int drm_property_replace_global_blob(struct drm_device *dev, 4472 struct drm_property_blob **replace, 4473 size_t length, 4474 const void *data, 4475 struct drm_mode_object *obj_holds_id, 4476 struct drm_property *prop_holds_id) 4477 { 4478 struct drm_property_blob *new_blob = NULL; 4479 struct drm_property_blob *old_blob = NULL; 4480 int ret; 4481 4482 WARN_ON(replace == NULL); 4483 4484 old_blob = *replace; 4485 4486 if (length && data) { 4487 new_blob = drm_property_create_blob(dev, length, data); 4488 if (IS_ERR(new_blob)) 4489 return PTR_ERR(new_blob); 4490 } 4491 4492 /* This does not need to be synchronised with blob_lock, as the 4493 * get_properties ioctl locks all modesetting objects, and 4494 * obj_holds_id must be locked before calling here, so we cannot 4495 * have its value out of sync with the list membership modified 4496 * below under blob_lock. */ 4497 if (obj_holds_id) { 4498 ret = drm_object_property_set_value(obj_holds_id, 4499 prop_holds_id, 4500 new_blob ? 4501 new_blob->base.id : 0); 4502 if (ret != 0) 4503 goto err_created; 4504 } 4505 4506 drm_property_unreference_blob(old_blob); 4507 *replace = new_blob; 4508 4509 return 0; 4510 4511 err_created: 4512 drm_property_unreference_blob(new_blob); 4513 return ret; 4514 } 4515 4516 /** 4517 * drm_mode_getblob_ioctl - get the contents of a blob property value 4518 * @dev: DRM device 4519 * @data: ioctl data 4520 * @file_priv: DRM file info 4521 * 4522 * This function retrieves the contents of a blob property. The value stored in 4523 * an object's blob property is just a normal modeset object id. 4524 * 4525 * Called by the user via ioctl. 4526 * 4527 * Returns: 4528 * Zero on success, negative errno on failure. 4529 */ 4530 int drm_mode_getblob_ioctl(struct drm_device *dev, 4531 void *data, struct drm_file *file_priv) 4532 { 4533 struct drm_mode_get_blob *out_resp = data; 4534 struct drm_property_blob *blob; 4535 int ret = 0; 4536 void __user *blob_ptr; 4537 4538 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4539 return -EINVAL; 4540 4541 drm_modeset_lock_all(dev); 4542 mutex_lock(&dev->mode_config.blob_lock); 4543 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4544 if (!blob) { 4545 ret = -ENOENT; 4546 goto done; 4547 } 4548 4549 if (out_resp->length == blob->length) { 4550 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4551 if (copy_to_user(blob_ptr, blob->data, blob->length)) { 4552 ret = -EFAULT; 4553 goto done; 4554 } 4555 } 4556 out_resp->length = blob->length; 4557 4558 done: 4559 mutex_unlock(&dev->mode_config.blob_lock); 4560 drm_modeset_unlock_all(dev); 4561 return ret; 4562 } 4563 4564 /** 4565 * drm_mode_createblob_ioctl - create a new blob property 4566 * @dev: DRM device 4567 * @data: ioctl data 4568 * @file_priv: DRM file info 4569 * 4570 * This function creates a new blob property with user-defined values. In order 4571 * to give us sensible validation and checking when creating, rather than at 4572 * every potential use, we also require a type to be provided upfront. 4573 * 4574 * Called by the user via ioctl. 4575 * 4576 * Returns: 4577 * Zero on success, negative errno on failure. 4578 */ 4579 int drm_mode_createblob_ioctl(struct drm_device *dev, 4580 void *data, struct drm_file *file_priv) 4581 { 4582 struct drm_mode_create_blob *out_resp = data; 4583 struct drm_property_blob *blob; 4584 void __user *blob_ptr; 4585 int ret = 0; 4586 4587 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4588 return -EINVAL; 4589 4590 blob = drm_property_create_blob(dev, out_resp->length, NULL); 4591 if (IS_ERR(blob)) 4592 return PTR_ERR(blob); 4593 4594 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4595 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) { 4596 ret = -EFAULT; 4597 goto out_blob; 4598 } 4599 4600 /* Dropping the lock between create_blob and our access here is safe 4601 * as only the same file_priv can remove the blob; at this point, it is 4602 * not associated with any file_priv. */ 4603 mutex_lock(&dev->mode_config.blob_lock); 4604 out_resp->blob_id = blob->base.id; 4605 list_add_tail(&blob->head_file, &file_priv->blobs); 4606 mutex_unlock(&dev->mode_config.blob_lock); 4607 4608 return 0; 4609 4610 out_blob: 4611 drm_property_unreference_blob(blob); 4612 return ret; 4613 } 4614 4615 /** 4616 * drm_mode_destroyblob_ioctl - destroy a user blob property 4617 * @dev: DRM device 4618 * @data: ioctl data 4619 * @file_priv: DRM file info 4620 * 4621 * Destroy an existing user-defined blob property. 4622 * 4623 * Called by the user via ioctl. 4624 * 4625 * Returns: 4626 * Zero on success, negative errno on failure. 4627 */ 4628 int drm_mode_destroyblob_ioctl(struct drm_device *dev, 4629 void *data, struct drm_file *file_priv) 4630 { 4631 struct drm_mode_destroy_blob *out_resp = data; 4632 struct drm_property_blob *blob = NULL, *bt; 4633 bool found = false; 4634 int ret = 0; 4635 4636 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4637 return -EINVAL; 4638 4639 mutex_lock(&dev->mode_config.blob_lock); 4640 blob = __drm_property_lookup_blob(dev, out_resp->blob_id); 4641 if (!blob) { 4642 ret = -ENOENT; 4643 goto err; 4644 } 4645 4646 /* Ensure the property was actually created by this user. */ 4647 list_for_each_entry(bt, &file_priv->blobs, head_file) { 4648 if (bt == blob) { 4649 found = true; 4650 break; 4651 } 4652 } 4653 4654 if (!found) { 4655 ret = -EPERM; 4656 goto err; 4657 } 4658 4659 /* We must drop head_file here, because we may not be the last 4660 * reference on the blob. */ 4661 list_del_init(&blob->head_file); 4662 drm_property_unreference_blob_locked(blob); 4663 mutex_unlock(&dev->mode_config.blob_lock); 4664 4665 return 0; 4666 4667 err: 4668 mutex_unlock(&dev->mode_config.blob_lock); 4669 return ret; 4670 } 4671 4672 /** 4673 * drm_mode_connector_set_path_property - set tile property on connector 4674 * @connector: connector to set property on. 4675 * @path: path to use for property; must not be NULL. 4676 * 4677 * This creates a property to expose to userspace to specify a 4678 * connector path. This is mainly used for DisplayPort MST where 4679 * connectors have a topology and we want to allow userspace to give 4680 * them more meaningful names. 4681 * 4682 * Returns: 4683 * Zero on success, negative errno on failure. 4684 */ 4685 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4686 const char *path) 4687 { 4688 struct drm_device *dev = connector->dev; 4689 int ret; 4690 4691 ret = drm_property_replace_global_blob(dev, 4692 &connector->path_blob_ptr, 4693 strlen(path) + 1, 4694 path, 4695 &connector->base, 4696 dev->mode_config.path_property); 4697 return ret; 4698 } 4699 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4700 4701 /** 4702 * drm_mode_connector_set_tile_property - set tile property on connector 4703 * @connector: connector to set property on. 4704 * 4705 * This looks up the tile information for a connector, and creates a 4706 * property for userspace to parse if it exists. The property is of 4707 * the form of 8 integers using ':' as a separator. 4708 * 4709 * Returns: 4710 * Zero on success, errno on failure. 4711 */ 4712 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4713 { 4714 struct drm_device *dev = connector->dev; 4715 char tile[256]; 4716 int ret; 4717 4718 if (!connector->has_tile) { 4719 ret = drm_property_replace_global_blob(dev, 4720 &connector->tile_blob_ptr, 4721 0, 4722 NULL, 4723 &connector->base, 4724 dev->mode_config.tile_property); 4725 return ret; 4726 } 4727 4728 ksnprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4729 connector->tile_group->id, connector->tile_is_single_monitor, 4730 connector->num_h_tile, connector->num_v_tile, 4731 connector->tile_h_loc, connector->tile_v_loc, 4732 connector->tile_h_size, connector->tile_v_size); 4733 4734 ret = drm_property_replace_global_blob(dev, 4735 &connector->tile_blob_ptr, 4736 strlen(tile) + 1, 4737 tile, 4738 &connector->base, 4739 dev->mode_config.tile_property); 4740 return ret; 4741 } 4742 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4743 4744 /** 4745 * drm_mode_connector_update_edid_property - update the edid property of a connector 4746 * @connector: drm connector 4747 * @edid: new value of the edid property 4748 * 4749 * This function creates a new blob modeset object and assigns its id to the 4750 * connector's edid property. 4751 * 4752 * Returns: 4753 * Zero on success, negative errno on failure. 4754 */ 4755 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4756 const struct edid *edid) 4757 { 4758 struct drm_device *dev = connector->dev; 4759 size_t size = 0; 4760 int ret; 4761 4762 /* ignore requests to set edid when overridden */ 4763 if (connector->override_edid) 4764 return 0; 4765 4766 if (edid) 4767 size = EDID_LENGTH * (1 + edid->extensions); 4768 4769 ret = drm_property_replace_global_blob(dev, 4770 &connector->edid_blob_ptr, 4771 size, 4772 edid, 4773 &connector->base, 4774 dev->mode_config.edid_property); 4775 return ret; 4776 } 4777 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4778 4779 /* Some properties could refer to dynamic refcnt'd objects, or things that 4780 * need special locking to handle lifetime issues (ie. to ensure the prop 4781 * value doesn't become invalid part way through the property update due to 4782 * race). The value returned by reference via 'obj' should be passed back 4783 * to drm_property_change_valid_put() after the property is set (and the 4784 * object to which the property is attached has a chance to take it's own 4785 * reference). 4786 */ 4787 bool drm_property_change_valid_get(struct drm_property *property, 4788 uint64_t value, struct drm_mode_object **ref) 4789 { 4790 int i; 4791 4792 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4793 return false; 4794 4795 *ref = NULL; 4796 4797 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4798 if (value < property->values[0] || value > property->values[1]) 4799 return false; 4800 return true; 4801 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4802 int64_t svalue = U642I64(value); 4803 4804 if (svalue < U642I64(property->values[0]) || 4805 svalue > U642I64(property->values[1])) 4806 return false; 4807 return true; 4808 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4809 uint64_t valid_mask = 0; 4810 4811 for (i = 0; i < property->num_values; i++) 4812 valid_mask |= (1ULL << property->values[i]); 4813 return !(value & ~valid_mask); 4814 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4815 struct drm_property_blob *blob; 4816 4817 if (value == 0) 4818 return true; 4819 4820 blob = drm_property_lookup_blob(property->dev, value); 4821 if (blob) { 4822 *ref = &blob->base; 4823 return true; 4824 } else { 4825 return false; 4826 } 4827 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4828 /* a zero value for an object property translates to null: */ 4829 if (value == 0) 4830 return true; 4831 4832 /* handle refcnt'd objects specially: */ 4833 if (property->values[0] == DRM_MODE_OBJECT_FB) { 4834 struct drm_framebuffer *fb; 4835 fb = drm_framebuffer_lookup(property->dev, value); 4836 if (fb) { 4837 *ref = &fb->base; 4838 return true; 4839 } else { 4840 return false; 4841 } 4842 } else { 4843 return _object_find(property->dev, value, property->values[0]) != NULL; 4844 } 4845 } 4846 4847 for (i = 0; i < property->num_values; i++) 4848 if (property->values[i] == value) 4849 return true; 4850 return false; 4851 } 4852 4853 void drm_property_change_valid_put(struct drm_property *property, 4854 struct drm_mode_object *ref) 4855 { 4856 if (!ref) 4857 return; 4858 4859 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4860 if (property->values[0] == DRM_MODE_OBJECT_FB) 4861 drm_framebuffer_unreference(obj_to_fb(ref)); 4862 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4863 drm_property_unreference_blob(obj_to_blob(ref)); 4864 } 4865 4866 /** 4867 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4868 * @dev: DRM device 4869 * @data: ioctl data 4870 * @file_priv: DRM file info 4871 * 4872 * This function sets the current value for a connectors's property. It also 4873 * calls into a driver's ->set_property callback to update the hardware state 4874 * 4875 * Called by the user via ioctl. 4876 * 4877 * Returns: 4878 * Zero on success, negative errno on failure. 4879 */ 4880 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4881 void *data, struct drm_file *file_priv) 4882 { 4883 struct drm_mode_connector_set_property *conn_set_prop = data; 4884 struct drm_mode_obj_set_property obj_set_prop = { 4885 .value = conn_set_prop->value, 4886 .prop_id = conn_set_prop->prop_id, 4887 .obj_id = conn_set_prop->connector_id, 4888 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4889 }; 4890 4891 /* It does all the locking and checking we need */ 4892 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4893 } 4894 4895 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4896 struct drm_property *property, 4897 uint64_t value) 4898 { 4899 int ret = -EINVAL; 4900 struct drm_connector *connector = obj_to_connector(obj); 4901 4902 /* Do DPMS ourselves */ 4903 if (property == connector->dev->mode_config.dpms_property) { 4904 ret = (*connector->funcs->dpms)(connector, (int)value); 4905 } else if (connector->funcs->set_property) 4906 ret = connector->funcs->set_property(connector, property, value); 4907 4908 /* store the property value if successful */ 4909 if (!ret) 4910 drm_object_property_set_value(&connector->base, property, value); 4911 return ret; 4912 } 4913 4914 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4915 struct drm_property *property, 4916 uint64_t value) 4917 { 4918 int ret = -EINVAL; 4919 struct drm_crtc *crtc = obj_to_crtc(obj); 4920 4921 if (crtc->funcs->set_property) 4922 ret = crtc->funcs->set_property(crtc, property, value); 4923 if (!ret) 4924 drm_object_property_set_value(obj, property, value); 4925 4926 return ret; 4927 } 4928 4929 /** 4930 * drm_mode_plane_set_obj_prop - set the value of a property 4931 * @plane: drm plane object to set property value for 4932 * @property: property to set 4933 * @value: value the property should be set to 4934 * 4935 * This functions sets a given property on a given plane object. This function 4936 * calls the driver's ->set_property callback and changes the software state of 4937 * the property if the callback succeeds. 4938 * 4939 * Returns: 4940 * Zero on success, error code on failure. 4941 */ 4942 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4943 struct drm_property *property, 4944 uint64_t value) 4945 { 4946 int ret = -EINVAL; 4947 struct drm_mode_object *obj = &plane->base; 4948 4949 if (plane->funcs->set_property) 4950 ret = plane->funcs->set_property(plane, property, value); 4951 if (!ret) 4952 drm_object_property_set_value(obj, property, value); 4953 4954 return ret; 4955 } 4956 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4957 4958 /** 4959 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 4960 * @dev: DRM device 4961 * @data: ioctl data 4962 * @file_priv: DRM file info 4963 * 4964 * This function retrieves the current value for an object's property. Compared 4965 * to the connector specific ioctl this one is extended to also work on crtc and 4966 * plane objects. 4967 * 4968 * Called by the user via ioctl. 4969 * 4970 * Returns: 4971 * Zero on success, negative errno on failure. 4972 */ 4973 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4974 struct drm_file *file_priv) 4975 { 4976 struct drm_mode_obj_get_properties *arg = data; 4977 struct drm_mode_object *obj; 4978 int ret = 0; 4979 4980 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4981 return -EINVAL; 4982 4983 drm_modeset_lock_all(dev); 4984 4985 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4986 if (!obj) { 4987 ret = -ENOENT; 4988 goto out; 4989 } 4990 if (!obj->properties) { 4991 ret = -EINVAL; 4992 goto out; 4993 } 4994 4995 ret = get_properties(obj, file_priv->atomic, 4996 (uint32_t __user *)(unsigned long)(arg->props_ptr), 4997 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), 4998 &arg->count_props); 4999 5000 out: 5001 drm_modeset_unlock_all(dev); 5002 return ret; 5003 } 5004 5005 /** 5006 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 5007 * @dev: DRM device 5008 * @data: ioctl data 5009 * @file_priv: DRM file info 5010 * 5011 * This function sets the current value for an object's property. It also calls 5012 * into a driver's ->set_property callback to update the hardware state. 5013 * Compared to the connector specific ioctl this one is extended to also work on 5014 * crtc and plane objects. 5015 * 5016 * Called by the user via ioctl. 5017 * 5018 * Returns: 5019 * Zero on success, negative errno on failure. 5020 */ 5021 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 5022 struct drm_file *file_priv) 5023 { 5024 struct drm_mode_obj_set_property *arg = data; 5025 struct drm_mode_object *arg_obj; 5026 struct drm_mode_object *prop_obj; 5027 struct drm_property *property; 5028 int i, ret = -EINVAL; 5029 struct drm_mode_object *ref; 5030 5031 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5032 return -EINVAL; 5033 5034 drm_modeset_lock_all(dev); 5035 5036 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 5037 if (!arg_obj) { 5038 ret = -ENOENT; 5039 goto out; 5040 } 5041 if (!arg_obj->properties) 5042 goto out; 5043 5044 for (i = 0; i < arg_obj->properties->count; i++) 5045 if (arg_obj->properties->properties[i]->base.id == arg->prop_id) 5046 break; 5047 5048 if (i == arg_obj->properties->count) 5049 goto out; 5050 5051 prop_obj = drm_mode_object_find(dev, arg->prop_id, 5052 DRM_MODE_OBJECT_PROPERTY); 5053 if (!prop_obj) { 5054 ret = -ENOENT; 5055 goto out; 5056 } 5057 property = obj_to_property(prop_obj); 5058 5059 if (!drm_property_change_valid_get(property, arg->value, &ref)) 5060 goto out; 5061 5062 switch (arg_obj->type) { 5063 case DRM_MODE_OBJECT_CONNECTOR: 5064 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 5065 arg->value); 5066 break; 5067 case DRM_MODE_OBJECT_CRTC: 5068 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 5069 break; 5070 case DRM_MODE_OBJECT_PLANE: 5071 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 5072 property, arg->value); 5073 break; 5074 } 5075 5076 drm_property_change_valid_put(property, ref); 5077 5078 out: 5079 drm_modeset_unlock_all(dev); 5080 return ret; 5081 } 5082 5083 /** 5084 * drm_mode_connector_attach_encoder - attach a connector to an encoder 5085 * @connector: connector to attach 5086 * @encoder: encoder to attach @connector to 5087 * 5088 * This function links up a connector to an encoder. Note that the routing 5089 * restrictions between encoders and crtcs are exposed to userspace through the 5090 * possible_clones and possible_crtcs bitmasks. 5091 * 5092 * Returns: 5093 * Zero on success, negative errno on failure. 5094 */ 5095 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 5096 struct drm_encoder *encoder) 5097 { 5098 int i; 5099 5100 /* 5101 * In the past, drivers have attempted to model the static association 5102 * of connector to encoder in simple connector/encoder devices using a 5103 * direct assignment of connector->encoder = encoder. This connection 5104 * is a logical one and the responsibility of the core, so drivers are 5105 * expected not to mess with this. 5106 * 5107 * Note that the error return should've been enough here, but a large 5108 * majority of drivers ignores the return value, so add in a big WARN 5109 * to get people's attention. 5110 */ 5111 if (WARN_ON(connector->encoder)) 5112 return -EINVAL; 5113 5114 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 5115 if (connector->encoder_ids[i] == 0) { 5116 connector->encoder_ids[i] = encoder->base.id; 5117 return 0; 5118 } 5119 } 5120 return -ENOMEM; 5121 } 5122 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 5123 5124 /** 5125 * drm_mode_crtc_set_gamma_size - set the gamma table size 5126 * @crtc: CRTC to set the gamma table size for 5127 * @gamma_size: size of the gamma table 5128 * 5129 * Drivers which support gamma tables should set this to the supported gamma 5130 * table size when initializing the CRTC. Currently the drm core only supports a 5131 * fixed gamma table size. 5132 * 5133 * Returns: 5134 * Zero on success, negative errno on failure. 5135 */ 5136 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 5137 int gamma_size) 5138 { 5139 crtc->gamma_size = gamma_size; 5140 5141 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, 5142 GFP_KERNEL); 5143 if (!crtc->gamma_store) { 5144 crtc->gamma_size = 0; 5145 return -ENOMEM; 5146 } 5147 5148 return 0; 5149 } 5150 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 5151 5152 /** 5153 * drm_mode_gamma_set_ioctl - set the gamma table 5154 * @dev: DRM device 5155 * @data: ioctl data 5156 * @file_priv: DRM file info 5157 * 5158 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 5159 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 5160 * 5161 * Called by the user via ioctl. 5162 * 5163 * Returns: 5164 * Zero on success, negative errno on failure. 5165 */ 5166 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 5167 void *data, struct drm_file *file_priv) 5168 { 5169 struct drm_mode_crtc_lut *crtc_lut = data; 5170 struct drm_crtc *crtc; 5171 void *r_base, *g_base, *b_base; 5172 int size; 5173 int ret = 0; 5174 5175 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5176 return -EINVAL; 5177 5178 drm_modeset_lock_all(dev); 5179 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5180 if (!crtc) { 5181 ret = -ENOENT; 5182 goto out; 5183 } 5184 5185 if (crtc->funcs->gamma_set == NULL) { 5186 ret = -ENOSYS; 5187 goto out; 5188 } 5189 5190 /* memcpy into gamma store */ 5191 if (crtc_lut->gamma_size != crtc->gamma_size) { 5192 ret = -EINVAL; 5193 goto out; 5194 } 5195 5196 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5197 r_base = crtc->gamma_store; 5198 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 5199 ret = -EFAULT; 5200 goto out; 5201 } 5202 5203 g_base = (char *)r_base + size; 5204 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 5205 ret = -EFAULT; 5206 goto out; 5207 } 5208 5209 b_base = (char *)g_base + size; 5210 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 5211 ret = -EFAULT; 5212 goto out; 5213 } 5214 5215 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 5216 5217 out: 5218 drm_modeset_unlock_all(dev); 5219 return ret; 5220 5221 } 5222 5223 /** 5224 * drm_mode_gamma_get_ioctl - get the gamma table 5225 * @dev: DRM device 5226 * @data: ioctl data 5227 * @file_priv: DRM file info 5228 * 5229 * Copy the current gamma table into the storage provided. This also provides 5230 * the gamma table size the driver expects, which can be used to size the 5231 * allocated storage. 5232 * 5233 * Called by the user via ioctl. 5234 * 5235 * Returns: 5236 * Zero on success, negative errno on failure. 5237 */ 5238 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 5239 void *data, struct drm_file *file_priv) 5240 { 5241 struct drm_mode_crtc_lut *crtc_lut = data; 5242 struct drm_crtc *crtc; 5243 void *r_base, *g_base, *b_base; 5244 int size; 5245 int ret = 0; 5246 5247 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5248 return -EINVAL; 5249 5250 drm_modeset_lock_all(dev); 5251 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5252 if (!crtc) { 5253 ret = -ENOENT; 5254 goto out; 5255 } 5256 5257 /* memcpy into gamma store */ 5258 if (crtc_lut->gamma_size != crtc->gamma_size) { 5259 ret = -EINVAL; 5260 goto out; 5261 } 5262 5263 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5264 r_base = crtc->gamma_store; 5265 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 5266 ret = -EFAULT; 5267 goto out; 5268 } 5269 5270 g_base = (char *)r_base + size; 5271 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 5272 ret = -EFAULT; 5273 goto out; 5274 } 5275 5276 b_base = (char *)g_base + size; 5277 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 5278 ret = -EFAULT; 5279 goto out; 5280 } 5281 out: 5282 drm_modeset_unlock_all(dev); 5283 return ret; 5284 } 5285 5286 /** 5287 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 5288 * @dev: DRM device 5289 * @data: ioctl data 5290 * @file_priv: DRM file info 5291 * 5292 * This schedules an asynchronous update on a given CRTC, called page flip. 5293 * Optionally a drm event is generated to signal the completion of the event. 5294 * Generic drivers cannot assume that a pageflip with changed framebuffer 5295 * properties (including driver specific metadata like tiling layout) will work, 5296 * but some drivers support e.g. pixel format changes through the pageflip 5297 * ioctl. 5298 * 5299 * Called by the user via ioctl. 5300 * 5301 * Returns: 5302 * Zero on success, negative errno on failure. 5303 */ 5304 int drm_mode_page_flip_ioctl(struct drm_device *dev, 5305 void *data, struct drm_file *file_priv) 5306 { 5307 struct drm_mode_crtc_page_flip *page_flip = data; 5308 struct drm_crtc *crtc; 5309 struct drm_framebuffer *fb = NULL; 5310 struct drm_pending_vblank_event *e = NULL; 5311 int ret = -EINVAL; 5312 5313 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 5314 page_flip->reserved != 0) 5315 return -EINVAL; 5316 5317 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 5318 return -EINVAL; 5319 5320 crtc = drm_crtc_find(dev, page_flip->crtc_id); 5321 if (!crtc) 5322 return -ENOENT; 5323 5324 drm_modeset_lock_crtc(crtc, crtc->primary); 5325 if (crtc->primary->fb == NULL) { 5326 /* The framebuffer is currently unbound, presumably 5327 * due to a hotplug event, that userspace has not 5328 * yet discovered. 5329 */ 5330 ret = -EBUSY; 5331 goto out; 5332 } 5333 5334 if (crtc->funcs->page_flip == NULL) 5335 goto out; 5336 5337 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 5338 if (!fb) { 5339 ret = -ENOENT; 5340 goto out; 5341 } 5342 5343 if (crtc->state) { 5344 const struct drm_plane_state *state = crtc->primary->state; 5345 5346 ret = check_src_coords(state->src_x, state->src_y, 5347 state->src_w, state->src_h, fb); 5348 } else { 5349 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 5350 } 5351 if (ret) 5352 goto out; 5353 5354 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 5355 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 5356 ret = -EINVAL; 5357 goto out; 5358 } 5359 5360 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5361 e = kzalloc(sizeof *e, GFP_KERNEL); 5362 if (!e) { 5363 ret = -ENOMEM; 5364 goto out; 5365 } 5366 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 5367 e->event.base.length = sizeof(e->event); 5368 e->event.user_data = page_flip->user_data; 5369 ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base); 5370 if (ret) { 5371 kfree(e); 5372 goto out; 5373 } 5374 } 5375 5376 crtc->primary->old_fb = crtc->primary->fb; 5377 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 5378 if (ret) { 5379 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) 5380 drm_event_cancel_free(dev, &e->base); 5381 /* Keep the old fb, don't unref it. */ 5382 crtc->primary->old_fb = NULL; 5383 } else { 5384 crtc->primary->fb = fb; 5385 /* Unref only the old framebuffer. */ 5386 fb = NULL; 5387 } 5388 5389 out: 5390 if (fb) 5391 drm_framebuffer_unreference(fb); 5392 if (crtc->primary->old_fb) 5393 drm_framebuffer_unreference(crtc->primary->old_fb); 5394 crtc->primary->old_fb = NULL; 5395 drm_modeset_unlock_crtc(crtc); 5396 5397 return ret; 5398 } 5399 5400 /** 5401 * drm_mode_config_reset - call ->reset callbacks 5402 * @dev: drm device 5403 * 5404 * This functions calls all the crtc's, encoder's and connector's ->reset 5405 * callback. Drivers can use this in e.g. their driver load or resume code to 5406 * reset hardware and software state. 5407 */ 5408 void drm_mode_config_reset(struct drm_device *dev) 5409 { 5410 struct drm_crtc *crtc; 5411 struct drm_plane *plane; 5412 struct drm_encoder *encoder; 5413 struct drm_connector *connector; 5414 5415 drm_for_each_plane(plane, dev) 5416 if (plane->funcs->reset) 5417 plane->funcs->reset(plane); 5418 5419 drm_for_each_crtc(crtc, dev) 5420 if (crtc->funcs->reset) 5421 crtc->funcs->reset(crtc); 5422 5423 drm_for_each_encoder(encoder, dev) 5424 if (encoder->funcs->reset) 5425 encoder->funcs->reset(encoder); 5426 5427 mutex_lock(&dev->mode_config.mutex); 5428 drm_for_each_connector(connector, dev) 5429 if (connector->funcs->reset) 5430 connector->funcs->reset(connector); 5431 mutex_unlock(&dev->mode_config.mutex); 5432 } 5433 EXPORT_SYMBOL(drm_mode_config_reset); 5434 5435 /** 5436 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 5437 * @dev: DRM device 5438 * @data: ioctl data 5439 * @file_priv: DRM file info 5440 * 5441 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 5442 * TTM or something else entirely) and returns the resulting buffer handle. This 5443 * handle can then be wrapped up into a framebuffer modeset object. 5444 * 5445 * Note that userspace is not allowed to use such objects for render 5446 * acceleration - drivers must create their own private ioctls for such a use 5447 * case. 5448 * 5449 * Called by the user via ioctl. 5450 * 5451 * Returns: 5452 * Zero on success, negative errno on failure. 5453 */ 5454 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 5455 void *data, struct drm_file *file_priv) 5456 { 5457 struct drm_mode_create_dumb *args = data; 5458 u32 cpp, stride, size; 5459 5460 if (!dev->driver->dumb_create) 5461 return -ENOSYS; 5462 if (!args->width || !args->height || !args->bpp) 5463 return -EINVAL; 5464 5465 /* overflow checks for 32bit size calculations */ 5466 /* NOTE: DIV_ROUND_UP() can overflow */ 5467 cpp = DIV_ROUND_UP(args->bpp, 8); 5468 if (!cpp || cpp > 0xffffffffU / args->width) 5469 return -EINVAL; 5470 stride = cpp * args->width; 5471 if (args->height > 0xffffffffU / stride) 5472 return -EINVAL; 5473 5474 /* test for wrap-around */ 5475 size = args->height * stride; 5476 if (PAGE_ALIGN(size) == 0) 5477 return -EINVAL; 5478 5479 /* 5480 * handle, pitch and size are output parameters. Zero them out to 5481 * prevent drivers from accidentally using uninitialized data. Since 5482 * not all existing userspace is clearing these fields properly we 5483 * cannot reject IOCTL with garbage in them. 5484 */ 5485 args->handle = 0; 5486 args->pitch = 0; 5487 args->size = 0; 5488 5489 return dev->driver->dumb_create(file_priv, dev, args); 5490 } 5491 5492 /** 5493 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 5494 * @dev: DRM device 5495 * @data: ioctl data 5496 * @file_priv: DRM file info 5497 * 5498 * Allocate an offset in the drm device node's address space to be able to 5499 * memory map a dumb buffer. 5500 * 5501 * Called by the user via ioctl. 5502 * 5503 * Returns: 5504 * Zero on success, negative errno on failure. 5505 */ 5506 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 5507 void *data, struct drm_file *file_priv) 5508 { 5509 struct drm_mode_map_dumb *args = data; 5510 5511 /* call driver ioctl to get mmap offset */ 5512 if (!dev->driver->dumb_map_offset) 5513 return -ENOSYS; 5514 5515 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 5516 } 5517 5518 /** 5519 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 5520 * @dev: DRM device 5521 * @data: ioctl data 5522 * @file_priv: DRM file info 5523 * 5524 * This destroys the userspace handle for the given dumb backing storage buffer. 5525 * Since buffer objects must be reference counted in the kernel a buffer object 5526 * won't be immediately freed if a framebuffer modeset object still uses it. 5527 * 5528 * Called by the user via ioctl. 5529 * 5530 * Returns: 5531 * Zero on success, negative errno on failure. 5532 */ 5533 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 5534 void *data, struct drm_file *file_priv) 5535 { 5536 struct drm_mode_destroy_dumb *args = data; 5537 5538 if (!dev->driver->dumb_destroy) 5539 return -ENOSYS; 5540 5541 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 5542 } 5543 5544 /** 5545 * drm_fb_get_bpp_depth - get the bpp/depth values for format 5546 * @format: pixel format (DRM_FORMAT_*) 5547 * @depth: storage for the depth value 5548 * @bpp: storage for the bpp value 5549 * 5550 * This only supports RGB formats here for compat with code that doesn't use 5551 * pixel formats directly yet. 5552 */ 5553 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 5554 int *bpp) 5555 { 5556 switch (format) { 5557 case DRM_FORMAT_C8: 5558 case DRM_FORMAT_RGB332: 5559 case DRM_FORMAT_BGR233: 5560 *depth = 8; 5561 *bpp = 8; 5562 break; 5563 case DRM_FORMAT_XRGB1555: 5564 case DRM_FORMAT_XBGR1555: 5565 case DRM_FORMAT_RGBX5551: 5566 case DRM_FORMAT_BGRX5551: 5567 case DRM_FORMAT_ARGB1555: 5568 case DRM_FORMAT_ABGR1555: 5569 case DRM_FORMAT_RGBA5551: 5570 case DRM_FORMAT_BGRA5551: 5571 *depth = 15; 5572 *bpp = 16; 5573 break; 5574 case DRM_FORMAT_RGB565: 5575 case DRM_FORMAT_BGR565: 5576 *depth = 16; 5577 *bpp = 16; 5578 break; 5579 case DRM_FORMAT_RGB888: 5580 case DRM_FORMAT_BGR888: 5581 *depth = 24; 5582 *bpp = 24; 5583 break; 5584 case DRM_FORMAT_XRGB8888: 5585 case DRM_FORMAT_XBGR8888: 5586 case DRM_FORMAT_RGBX8888: 5587 case DRM_FORMAT_BGRX8888: 5588 *depth = 24; 5589 *bpp = 32; 5590 break; 5591 case DRM_FORMAT_XRGB2101010: 5592 case DRM_FORMAT_XBGR2101010: 5593 case DRM_FORMAT_RGBX1010102: 5594 case DRM_FORMAT_BGRX1010102: 5595 case DRM_FORMAT_ARGB2101010: 5596 case DRM_FORMAT_ABGR2101010: 5597 case DRM_FORMAT_RGBA1010102: 5598 case DRM_FORMAT_BGRA1010102: 5599 *depth = 30; 5600 *bpp = 32; 5601 break; 5602 case DRM_FORMAT_ARGB8888: 5603 case DRM_FORMAT_ABGR8888: 5604 case DRM_FORMAT_RGBA8888: 5605 case DRM_FORMAT_BGRA8888: 5606 *depth = 32; 5607 *bpp = 32; 5608 break; 5609 default: 5610 DRM_DEBUG_KMS("unsupported pixel format %s\n", 5611 drm_get_format_name(format)); 5612 *depth = 0; 5613 *bpp = 0; 5614 break; 5615 } 5616 } 5617 EXPORT_SYMBOL(drm_fb_get_bpp_depth); 5618 5619 /** 5620 * drm_format_num_planes - get the number of planes for format 5621 * @format: pixel format (DRM_FORMAT_*) 5622 * 5623 * Returns: 5624 * The number of planes used by the specified pixel format. 5625 */ 5626 int drm_format_num_planes(uint32_t format) 5627 { 5628 switch (format) { 5629 case DRM_FORMAT_YUV410: 5630 case DRM_FORMAT_YVU410: 5631 case DRM_FORMAT_YUV411: 5632 case DRM_FORMAT_YVU411: 5633 case DRM_FORMAT_YUV420: 5634 case DRM_FORMAT_YVU420: 5635 case DRM_FORMAT_YUV422: 5636 case DRM_FORMAT_YVU422: 5637 case DRM_FORMAT_YUV444: 5638 case DRM_FORMAT_YVU444: 5639 return 3; 5640 case DRM_FORMAT_NV12: 5641 case DRM_FORMAT_NV21: 5642 case DRM_FORMAT_NV16: 5643 case DRM_FORMAT_NV61: 5644 case DRM_FORMAT_NV24: 5645 case DRM_FORMAT_NV42: 5646 return 2; 5647 default: 5648 return 1; 5649 } 5650 } 5651 EXPORT_SYMBOL(drm_format_num_planes); 5652 5653 /** 5654 * drm_format_plane_cpp - determine the bytes per pixel value 5655 * @format: pixel format (DRM_FORMAT_*) 5656 * @plane: plane index 5657 * 5658 * Returns: 5659 * The bytes per pixel value for the specified plane. 5660 */ 5661 int drm_format_plane_cpp(uint32_t format, int plane) 5662 { 5663 unsigned int depth; 5664 int bpp; 5665 5666 if (plane >= drm_format_num_planes(format)) 5667 return 0; 5668 5669 switch (format) { 5670 case DRM_FORMAT_YUYV: 5671 case DRM_FORMAT_YVYU: 5672 case DRM_FORMAT_UYVY: 5673 case DRM_FORMAT_VYUY: 5674 return 2; 5675 case DRM_FORMAT_NV12: 5676 case DRM_FORMAT_NV21: 5677 case DRM_FORMAT_NV16: 5678 case DRM_FORMAT_NV61: 5679 case DRM_FORMAT_NV24: 5680 case DRM_FORMAT_NV42: 5681 return plane ? 2 : 1; 5682 case DRM_FORMAT_YUV410: 5683 case DRM_FORMAT_YVU410: 5684 case DRM_FORMAT_YUV411: 5685 case DRM_FORMAT_YVU411: 5686 case DRM_FORMAT_YUV420: 5687 case DRM_FORMAT_YVU420: 5688 case DRM_FORMAT_YUV422: 5689 case DRM_FORMAT_YVU422: 5690 case DRM_FORMAT_YUV444: 5691 case DRM_FORMAT_YVU444: 5692 return 1; 5693 default: 5694 drm_fb_get_bpp_depth(format, &depth, &bpp); 5695 return bpp >> 3; 5696 } 5697 } 5698 EXPORT_SYMBOL(drm_format_plane_cpp); 5699 5700 /** 5701 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 5702 * @format: pixel format (DRM_FORMAT_*) 5703 * 5704 * Returns: 5705 * The horizontal chroma subsampling factor for the 5706 * specified pixel format. 5707 */ 5708 int drm_format_horz_chroma_subsampling(uint32_t format) 5709 { 5710 switch (format) { 5711 case DRM_FORMAT_YUV411: 5712 case DRM_FORMAT_YVU411: 5713 case DRM_FORMAT_YUV410: 5714 case DRM_FORMAT_YVU410: 5715 return 4; 5716 case DRM_FORMAT_YUYV: 5717 case DRM_FORMAT_YVYU: 5718 case DRM_FORMAT_UYVY: 5719 case DRM_FORMAT_VYUY: 5720 case DRM_FORMAT_NV12: 5721 case DRM_FORMAT_NV21: 5722 case DRM_FORMAT_NV16: 5723 case DRM_FORMAT_NV61: 5724 case DRM_FORMAT_YUV422: 5725 case DRM_FORMAT_YVU422: 5726 case DRM_FORMAT_YUV420: 5727 case DRM_FORMAT_YVU420: 5728 return 2; 5729 default: 5730 return 1; 5731 } 5732 } 5733 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5734 5735 /** 5736 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5737 * @format: pixel format (DRM_FORMAT_*) 5738 * 5739 * Returns: 5740 * The vertical chroma subsampling factor for the 5741 * specified pixel format. 5742 */ 5743 int drm_format_vert_chroma_subsampling(uint32_t format) 5744 { 5745 switch (format) { 5746 case DRM_FORMAT_YUV410: 5747 case DRM_FORMAT_YVU410: 5748 return 4; 5749 case DRM_FORMAT_YUV420: 5750 case DRM_FORMAT_YVU420: 5751 case DRM_FORMAT_NV12: 5752 case DRM_FORMAT_NV21: 5753 return 2; 5754 default: 5755 return 1; 5756 } 5757 } 5758 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5759 5760 /** 5761 * drm_format_plane_width - width of the plane given the first plane 5762 * @width: width of the first plane 5763 * @format: pixel format 5764 * @plane: plane index 5765 * 5766 * Returns: 5767 * The width of @plane, given that the width of the first plane is @width. 5768 */ 5769 int drm_format_plane_width(int width, uint32_t format, int plane) 5770 { 5771 if (plane >= drm_format_num_planes(format)) 5772 return 0; 5773 5774 if (plane == 0) 5775 return width; 5776 5777 return width / drm_format_horz_chroma_subsampling(format); 5778 } 5779 EXPORT_SYMBOL(drm_format_plane_width); 5780 5781 /** 5782 * drm_format_plane_height - height of the plane given the first plane 5783 * @height: height of the first plane 5784 * @format: pixel format 5785 * @plane: plane index 5786 * 5787 * Returns: 5788 * The height of @plane, given that the height of the first plane is @height. 5789 */ 5790 int drm_format_plane_height(int height, uint32_t format, int plane) 5791 { 5792 if (plane >= drm_format_num_planes(format)) 5793 return 0; 5794 5795 if (plane == 0) 5796 return height; 5797 5798 return height / drm_format_vert_chroma_subsampling(format); 5799 } 5800 EXPORT_SYMBOL(drm_format_plane_height); 5801 5802 /** 5803 * drm_rotation_simplify() - Try to simplify the rotation 5804 * @rotation: Rotation to be simplified 5805 * @supported_rotations: Supported rotations 5806 * 5807 * Attempt to simplify the rotation to a form that is supported. 5808 * Eg. if the hardware supports everything except DRM_REFLECT_X 5809 * one could call this function like this: 5810 * 5811 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5812 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5813 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5814 * 5815 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5816 * transforms the hardware supports, this function may not 5817 * be able to produce a supported transform, so the caller should 5818 * check the result afterwards. 5819 */ 5820 unsigned int drm_rotation_simplify(unsigned int rotation, 5821 unsigned int supported_rotations) 5822 { 5823 if (rotation & ~supported_rotations) { 5824 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5825 rotation = (rotation & DRM_REFLECT_MASK) | 5826 BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4); 5827 } 5828 5829 return rotation; 5830 } 5831 EXPORT_SYMBOL(drm_rotation_simplify); 5832 5833 /** 5834 * drm_mode_config_init - initialize DRM mode_configuration structure 5835 * @dev: DRM device 5836 * 5837 * Initialize @dev's mode_config structure, used for tracking the graphics 5838 * configuration of @dev. 5839 * 5840 * Since this initializes the modeset locks, no locking is possible. Which is no 5841 * problem, since this should happen single threaded at init time. It is the 5842 * driver's problem to ensure this guarantee. 5843 * 5844 */ 5845 void drm_mode_config_init(struct drm_device *dev) 5846 { 5847 lockinit(&dev->mode_config.mutex, "drmmcm", 0, LK_CANRECURSE); 5848 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5849 lockinit(&dev->mode_config.idr_mutex, "mcfgidr", 0, LK_CANRECURSE); 5850 lockinit(&dev->mode_config.fb_lock, "drmfbl", 0, LK_CANRECURSE); 5851 lockinit(&dev->mode_config.blob_lock, "drmcbl", 0, LK_CANRECURSE); 5852 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5853 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5854 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5855 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5856 INIT_LIST_HEAD(&dev->mode_config.property_list); 5857 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5858 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5859 idr_init(&dev->mode_config.crtc_idr); 5860 idr_init(&dev->mode_config.tile_idr); 5861 ida_init(&dev->mode_config.connector_ida); 5862 5863 drm_modeset_lock_all(dev); 5864 drm_mode_create_standard_properties(dev); 5865 drm_modeset_unlock_all(dev); 5866 5867 /* Just to be sure */ 5868 dev->mode_config.num_fb = 0; 5869 dev->mode_config.num_connector = 0; 5870 dev->mode_config.num_crtc = 0; 5871 dev->mode_config.num_encoder = 0; 5872 dev->mode_config.num_overlay_plane = 0; 5873 dev->mode_config.num_total_plane = 0; 5874 } 5875 EXPORT_SYMBOL(drm_mode_config_init); 5876 5877 /** 5878 * drm_mode_config_cleanup - free up DRM mode_config info 5879 * @dev: DRM device 5880 * 5881 * Free up all the connectors and CRTCs associated with this DRM device, then 5882 * free up the framebuffers and associated buffer objects. 5883 * 5884 * Note that since this /should/ happen single-threaded at driver/device 5885 * teardown time, no locking is required. It's the driver's job to ensure that 5886 * this guarantee actually holds true. 5887 * 5888 * FIXME: cleanup any dangling user buffer objects too 5889 */ 5890 void drm_mode_config_cleanup(struct drm_device *dev) 5891 { 5892 struct drm_connector *connector, *ot; 5893 struct drm_crtc *crtc, *ct; 5894 struct drm_encoder *encoder, *enct; 5895 struct drm_framebuffer *fb, *fbt; 5896 struct drm_property *property, *pt; 5897 struct drm_property_blob *blob, *bt; 5898 struct drm_plane *plane, *plt; 5899 5900 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5901 head) { 5902 encoder->funcs->destroy(encoder); 5903 } 5904 5905 list_for_each_entry_safe(connector, ot, 5906 &dev->mode_config.connector_list, head) { 5907 connector->funcs->destroy(connector); 5908 } 5909 5910 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5911 head) { 5912 drm_property_destroy(dev, property); 5913 } 5914 5915 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5916 head_global) { 5917 drm_property_unreference_blob(blob); 5918 } 5919 5920 /* 5921 * Single-threaded teardown context, so it's not required to grab the 5922 * fb_lock to protect against concurrent fb_list access. Contrary, it 5923 * would actually deadlock with the drm_framebuffer_cleanup function. 5924 * 5925 * Also, if there are any framebuffers left, that's a driver leak now, 5926 * so politely WARN about this. 5927 */ 5928 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5929 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5930 drm_framebuffer_free(&fb->refcount); 5931 } 5932 5933 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5934 head) { 5935 plane->funcs->destroy(plane); 5936 } 5937 5938 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5939 crtc->funcs->destroy(crtc); 5940 } 5941 5942 ida_destroy(&dev->mode_config.connector_ida); 5943 idr_destroy(&dev->mode_config.tile_idr); 5944 idr_destroy(&dev->mode_config.crtc_idr); 5945 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5946 } 5947 EXPORT_SYMBOL(drm_mode_config_cleanup); 5948 5949 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5950 unsigned int supported_rotations) 5951 { 5952 static const struct drm_prop_enum_list props[] = { 5953 { DRM_ROTATE_0, "rotate-0" }, 5954 { DRM_ROTATE_90, "rotate-90" }, 5955 { DRM_ROTATE_180, "rotate-180" }, 5956 { DRM_ROTATE_270, "rotate-270" }, 5957 { DRM_REFLECT_X, "reflect-x" }, 5958 { DRM_REFLECT_Y, "reflect-y" }, 5959 }; 5960 5961 return drm_property_create_bitmask(dev, 0, "rotation", 5962 props, ARRAY_SIZE(props), 5963 supported_rotations); 5964 } 5965 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5966 5967 /** 5968 * DOC: Tile group 5969 * 5970 * Tile groups are used to represent tiled monitors with a unique 5971 * integer identifier. Tiled monitors using DisplayID v1.3 have 5972 * a unique 8-byte handle, we store this in a tile group, so we 5973 * have a common identifier for all tiles in a monitor group. 5974 */ 5975 static void drm_tile_group_free(struct kref *kref) 5976 { 5977 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5978 struct drm_device *dev = tg->dev; 5979 mutex_lock(&dev->mode_config.idr_mutex); 5980 idr_remove(&dev->mode_config.tile_idr, tg->id); 5981 mutex_unlock(&dev->mode_config.idr_mutex); 5982 kfree(tg); 5983 } 5984 5985 /** 5986 * drm_mode_put_tile_group - drop a reference to a tile group. 5987 * @dev: DRM device 5988 * @tg: tile group to drop reference to. 5989 * 5990 * drop reference to tile group and free if 0. 5991 */ 5992 void drm_mode_put_tile_group(struct drm_device *dev, 5993 struct drm_tile_group *tg) 5994 { 5995 kref_put(&tg->refcount, drm_tile_group_free); 5996 } 5997 5998 /** 5999 * drm_mode_get_tile_group - get a reference to an existing tile group 6000 * @dev: DRM device 6001 * @topology: 8-bytes unique per monitor. 6002 * 6003 * Use the unique bytes to get a reference to an existing tile group. 6004 * 6005 * RETURNS: 6006 * tile group or NULL if not found. 6007 */ 6008 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 6009 char topology[8]) 6010 { 6011 #if 0 6012 struct drm_tile_group *tg; 6013 int id; 6014 mutex_lock(&dev->mode_config.idr_mutex); 6015 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 6016 if (!memcmp(tg->group_data, topology, 8)) { 6017 if (!kref_get_unless_zero(&tg->refcount)) 6018 tg = NULL; 6019 mutex_unlock(&dev->mode_config.idr_mutex); 6020 return tg; 6021 } 6022 } 6023 mutex_unlock(&dev->mode_config.idr_mutex); 6024 #endif 6025 return NULL; 6026 } 6027 EXPORT_SYMBOL(drm_mode_get_tile_group); 6028 6029 /** 6030 * drm_mode_create_tile_group - create a tile group from a displayid description 6031 * @dev: DRM device 6032 * @topology: 8-bytes unique per monitor. 6033 * 6034 * Create a tile group for the unique monitor, and get a unique 6035 * identifier for the tile group. 6036 * 6037 * RETURNS: 6038 * new tile group or error. 6039 */ 6040 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 6041 char topology[8]) 6042 { 6043 struct drm_tile_group *tg; 6044 int ret; 6045 6046 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 6047 if (!tg) 6048 return ERR_PTR(-ENOMEM); 6049 6050 kref_init(&tg->refcount); 6051 memcpy(tg->group_data, topology, 8); 6052 tg->dev = dev; 6053 6054 mutex_lock(&dev->mode_config.idr_mutex); 6055 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 6056 if (ret >= 0) { 6057 tg->id = ret; 6058 } else { 6059 kfree(tg); 6060 tg = ERR_PTR(ret); 6061 } 6062 6063 mutex_unlock(&dev->mode_config.idr_mutex); 6064 return tg; 6065 } 6066 EXPORT_SYMBOL(drm_mode_create_tile_group); 6067