1 /* 2 * Copyright (c) 2006-2008 Intel Corporation 3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 4 * Copyright (c) 2008 Red Hat Inc. 5 * 6 * DRM core CRTC related functions 7 * 8 * Permission to use, copy, modify, distribute, and sell this software and its 9 * documentation for any purpose is hereby granted without fee, provided that 10 * the above copyright notice appear in all copies and that both that copyright 11 * notice and this permission notice appear in supporting documentation, and 12 * that the name of the copyright holders not be used in advertising or 13 * publicity pertaining to distribution of the software without specific, 14 * written prior permission. The copyright holders make no representations 15 * about the suitability of this software for any purpose. It is provided "as 16 * is" without express or implied warranty. 17 * 18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 24 * OF THIS SOFTWARE. 25 * 26 * Authors: 27 * Keith Packard 28 * Eric Anholt <eric@anholt.net> 29 * Dave Airlie <airlied@linux.ie> 30 * Jesse Barnes <jesse.barnes@intel.com> 31 */ 32 #include <linux/ctype.h> 33 #include <linux/list.h> 34 #include <linux/slab.h> 35 #include <linux/export.h> 36 #include <drm/drmP.h> 37 #include <drm/drm_crtc.h> 38 #include <drm/drm_edid.h> 39 #include <drm/drm_fourcc.h> 40 #include <drm/drm_modeset_lock.h> 41 #include <drm/drm_atomic.h> 42 43 #include "drm_crtc_internal.h" 44 #include "drm_internal.h" 45 46 static struct drm_framebuffer * 47 internal_framebuffer_create(struct drm_device *dev, 48 struct drm_mode_fb_cmd2 *r, 49 struct drm_file *file_priv); 50 51 /* Avoid boilerplate. I'm tired of typing. */ 52 #define DRM_ENUM_NAME_FN(fnname, list) \ 53 const char *fnname(int val) \ 54 { \ 55 int i; \ 56 for (i = 0; i < ARRAY_SIZE(list); i++) { \ 57 if (list[i].type == val) \ 58 return list[i].name; \ 59 } \ 60 return "(unknown)"; \ 61 } 62 63 /* 64 * Global properties 65 */ 66 static const struct drm_prop_enum_list drm_dpms_enum_list[] = { 67 { DRM_MODE_DPMS_ON, "On" }, 68 { DRM_MODE_DPMS_STANDBY, "Standby" }, 69 { DRM_MODE_DPMS_SUSPEND, "Suspend" }, 70 { DRM_MODE_DPMS_OFF, "Off" } 71 }; 72 73 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) 74 75 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { 76 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 77 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 78 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 79 }; 80 81 /* 82 * Optional properties 83 */ 84 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { 85 { DRM_MODE_SCALE_NONE, "None" }, 86 { DRM_MODE_SCALE_FULLSCREEN, "Full" }, 87 { DRM_MODE_SCALE_CENTER, "Center" }, 88 { DRM_MODE_SCALE_ASPECT, "Full aspect" }, 89 }; 90 91 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { 92 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, 93 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, 94 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, 95 }; 96 97 /* 98 * Non-global properties, but "required" for certain connectors. 99 */ 100 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { 101 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 102 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 103 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 104 }; 105 106 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) 107 108 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { 109 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 110 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 111 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 112 }; 113 114 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, 115 drm_dvi_i_subconnector_enum_list) 116 117 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { 118 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 119 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 120 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 121 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 122 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 123 }; 124 125 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) 126 127 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { 128 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 129 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 130 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 131 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 132 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 133 }; 134 135 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, 136 drm_tv_subconnector_enum_list) 137 138 static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = { 139 { DRM_MODE_DIRTY_OFF, "Off" }, 140 { DRM_MODE_DIRTY_ON, "On" }, 141 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" }, 142 }; 143 144 struct drm_conn_prop_enum_list { 145 int type; 146 const char *name; 147 struct ida ida; 148 }; 149 150 /* 151 * Connector and encoder types. 152 */ 153 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { 154 { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, 155 { DRM_MODE_CONNECTOR_VGA, "VGA" }, 156 { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, 157 { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, 158 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, 159 { DRM_MODE_CONNECTOR_Composite, "Composite" }, 160 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, 161 { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, 162 { DRM_MODE_CONNECTOR_Component, "Component" }, 163 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, 164 { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, 165 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, 166 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, 167 { DRM_MODE_CONNECTOR_TV, "TV" }, 168 { DRM_MODE_CONNECTOR_eDP, "eDP" }, 169 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, 170 { DRM_MODE_CONNECTOR_DSI, "DSI" }, 171 }; 172 173 static const struct drm_prop_enum_list drm_encoder_enum_list[] = { 174 { DRM_MODE_ENCODER_NONE, "None" }, 175 { DRM_MODE_ENCODER_DAC, "DAC" }, 176 { DRM_MODE_ENCODER_TMDS, "TMDS" }, 177 { DRM_MODE_ENCODER_LVDS, "LVDS" }, 178 { DRM_MODE_ENCODER_TVDAC, "TV" }, 179 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" }, 180 { DRM_MODE_ENCODER_DSI, "DSI" }, 181 { DRM_MODE_ENCODER_DPMST, "DP MST" }, 182 }; 183 184 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { 185 { SubPixelUnknown, "Unknown" }, 186 { SubPixelHorizontalRGB, "Horizontal RGB" }, 187 { SubPixelHorizontalBGR, "Horizontal BGR" }, 188 { SubPixelVerticalRGB, "Vertical RGB" }, 189 { SubPixelVerticalBGR, "Vertical BGR" }, 190 { SubPixelNone, "None" }, 191 }; 192 193 void drm_connector_ida_init(void) 194 { 195 int i; 196 197 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 198 ida_init(&drm_connector_enum_list[i].ida); 199 } 200 201 void drm_connector_ida_destroy(void) 202 { 203 int i; 204 205 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 206 ida_destroy(&drm_connector_enum_list[i].ida); 207 } 208 209 /** 210 * drm_get_connector_status_name - return a string for connector status 211 * @status: connector status to compute name of 212 * 213 * In contrast to the other drm_get_*_name functions this one here returns a 214 * const pointer and hence is threadsafe. 215 */ 216 const char *drm_get_connector_status_name(enum drm_connector_status status) 217 { 218 if (status == connector_status_connected) 219 return "connected"; 220 else if (status == connector_status_disconnected) 221 return "disconnected"; 222 else 223 return "unknown"; 224 } 225 EXPORT_SYMBOL(drm_get_connector_status_name); 226 227 /** 228 * drm_get_subpixel_order_name - return a string for a given subpixel enum 229 * @order: enum of subpixel_order 230 * 231 * Note you could abuse this and return something out of bounds, but that 232 * would be a caller error. No unscrubbed user data should make it here. 233 */ 234 const char *drm_get_subpixel_order_name(enum subpixel_order order) 235 { 236 return drm_subpixel_enum_list[order].name; 237 } 238 EXPORT_SYMBOL(drm_get_subpixel_order_name); 239 240 static char printable_char(int c) 241 { 242 return isascii(c) && isprint(c) ? c : '?'; 243 } 244 245 /** 246 * drm_get_format_name - return a string for drm fourcc format 247 * @format: format to compute name of 248 * 249 * Note that the buffer used by this function is globally shared and owned by 250 * the function itself. 251 * 252 * FIXME: This isn't really multithreading safe. 253 */ 254 const char *drm_get_format_name(uint32_t format) 255 { 256 static char buf[32]; 257 258 snprintf(buf, sizeof(buf), 259 "%c%c%c%c %s-endian (0x%08x)", 260 printable_char(format & 0xff), 261 printable_char((format >> 8) & 0xff), 262 printable_char((format >> 16) & 0xff), 263 printable_char((format >> 24) & 0x7f), 264 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", 265 format); 266 267 return buf; 268 } 269 EXPORT_SYMBOL(drm_get_format_name); 270 271 /* 272 * Internal function to assign a slot in the object idr and optionally 273 * register the object into the idr. 274 */ 275 static int drm_mode_object_get_reg(struct drm_device *dev, 276 struct drm_mode_object *obj, 277 uint32_t obj_type, 278 bool register_obj) 279 { 280 int ret; 281 282 mutex_lock(&dev->mode_config.idr_mutex); 283 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); 284 if (ret >= 0) { 285 /* 286 * Set up the object linking under the protection of the idr 287 * lock so that other users can't see inconsistent state. 288 */ 289 obj->id = ret; 290 obj->type = obj_type; 291 } 292 mutex_unlock(&dev->mode_config.idr_mutex); 293 294 return ret < 0 ? ret : 0; 295 } 296 297 /** 298 * drm_mode_object_get - allocate a new modeset identifier 299 * @dev: DRM device 300 * @obj: object pointer, used to generate unique ID 301 * @obj_type: object type 302 * 303 * Create a unique identifier based on @ptr in @dev's identifier space. Used 304 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix 305 * modeset identifiers are _not_ reference counted. Hence don't use this for 306 * reference counted modeset objects like framebuffers. 307 * 308 * Returns: 309 * New unique (relative to other objects in @dev) integer identifier for the 310 * object. 311 */ 312 int drm_mode_object_get(struct drm_device *dev, 313 struct drm_mode_object *obj, uint32_t obj_type) 314 { 315 return drm_mode_object_get_reg(dev, obj, obj_type, true); 316 } 317 318 static void drm_mode_object_register(struct drm_device *dev, 319 struct drm_mode_object *obj) 320 { 321 mutex_lock(&dev->mode_config.idr_mutex); 322 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); 323 mutex_unlock(&dev->mode_config.idr_mutex); 324 } 325 326 /** 327 * drm_mode_object_put - free a modeset identifer 328 * @dev: DRM device 329 * @object: object to free 330 * 331 * Free @id from @dev's unique identifier pool. Note that despite the _get 332 * postfix modeset identifiers are _not_ reference counted. Hence don't use this 333 * for reference counted modeset objects like framebuffers. 334 */ 335 void drm_mode_object_put(struct drm_device *dev, 336 struct drm_mode_object *object) 337 { 338 mutex_lock(&dev->mode_config.idr_mutex); 339 idr_remove(&dev->mode_config.crtc_idr, object->id); 340 mutex_unlock(&dev->mode_config.idr_mutex); 341 } 342 343 static struct drm_mode_object *_object_find(struct drm_device *dev, 344 uint32_t id, uint32_t type) 345 { 346 struct drm_mode_object *obj = NULL; 347 348 mutex_lock(&dev->mode_config.idr_mutex); 349 obj = idr_find(&dev->mode_config.crtc_idr, id); 350 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) 351 obj = NULL; 352 if (obj && obj->id != id) 353 obj = NULL; 354 /* don't leak out unref'd fb's */ 355 if (obj && (obj->type == DRM_MODE_OBJECT_FB)) 356 obj = NULL; 357 mutex_unlock(&dev->mode_config.idr_mutex); 358 359 return obj; 360 } 361 362 /** 363 * drm_mode_object_find - look up a drm object with static lifetime 364 * @dev: drm device 365 * @id: id of the mode object 366 * @type: type of the mode object 367 * 368 * Note that framebuffers cannot be looked up with this functions - since those 369 * are reference counted, they need special treatment. Even with 370 * DRM_MODE_OBJECT_ANY (although that will simply return NULL 371 * rather than WARN_ON()). 372 */ 373 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, 374 uint32_t id, uint32_t type) 375 { 376 struct drm_mode_object *obj = NULL; 377 378 /* Framebuffers are reference counted and need their own lookup 379 * function.*/ 380 WARN_ON(type == DRM_MODE_OBJECT_FB); 381 obj = _object_find(dev, id, type); 382 return obj; 383 } 384 EXPORT_SYMBOL(drm_mode_object_find); 385 386 /** 387 * drm_framebuffer_init - initialize a framebuffer 388 * @dev: DRM device 389 * @fb: framebuffer to be initialized 390 * @funcs: ... with these functions 391 * 392 * Allocates an ID for the framebuffer's parent mode object, sets its mode 393 * functions & device file and adds it to the master fd list. 394 * 395 * IMPORTANT: 396 * This functions publishes the fb and makes it available for concurrent access 397 * by other users. Which means by this point the fb _must_ be fully set up - 398 * since all the fb attributes are invariant over its lifetime, no further 399 * locking but only correct reference counting is required. 400 * 401 * Returns: 402 * Zero on success, error code on failure. 403 */ 404 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, 405 const struct drm_framebuffer_funcs *funcs) 406 { 407 int ret; 408 409 mutex_lock(&dev->mode_config.fb_lock); 410 kref_init(&fb->refcount); 411 INIT_LIST_HEAD(&fb->filp_head); 412 fb->dev = dev; 413 fb->funcs = funcs; 414 415 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB); 416 if (ret) 417 goto out; 418 419 dev->mode_config.num_fb++; 420 list_add(&fb->head, &dev->mode_config.fb_list); 421 out: 422 mutex_unlock(&dev->mode_config.fb_lock); 423 424 return 0; 425 } 426 EXPORT_SYMBOL(drm_framebuffer_init); 427 428 /* dev->mode_config.fb_lock must be held! */ 429 static void __drm_framebuffer_unregister(struct drm_device *dev, 430 struct drm_framebuffer *fb) 431 { 432 mutex_lock(&dev->mode_config.idr_mutex); 433 idr_remove(&dev->mode_config.crtc_idr, fb->base.id); 434 mutex_unlock(&dev->mode_config.idr_mutex); 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 = fb->dev; 540 541 mutex_lock(&dev->mode_config.fb_lock); 542 /* Mark fb as reaped and drop idr ref. */ 543 __drm_framebuffer_unregister(dev, fb); 544 mutex_unlock(&dev->mode_config.fb_lock); 545 } 546 EXPORT_SYMBOL(drm_framebuffer_unregister_private); 547 548 /** 549 * drm_framebuffer_cleanup - remove a framebuffer object 550 * @fb: framebuffer to remove 551 * 552 * Cleanup framebuffer. This function is intended to be used from the drivers 553 * ->destroy callback. It can also be used to clean up driver private 554 * framebuffers embedded into a larger structure. 555 * 556 * Note that this function does not remove the fb from active usuage - if it is 557 * still used anywhere, hilarity can ensue since userspace could call getfb on 558 * the id and get back -EINVAL. Obviously no concern at driver unload time. 559 * 560 * Also, the framebuffer will not be removed from the lookup idr - for 561 * user-created framebuffers this will happen in in the rmfb ioctl. For 562 * driver-private objects (e.g. for fbdev) drivers need to explicitly call 563 * drm_framebuffer_unregister_private. 564 */ 565 void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 566 { 567 struct drm_device *dev = fb->dev; 568 569 mutex_lock(&dev->mode_config.fb_lock); 570 list_del(&fb->head); 571 dev->mode_config.num_fb--; 572 mutex_unlock(&dev->mode_config.fb_lock); 573 } 574 EXPORT_SYMBOL(drm_framebuffer_cleanup); 575 576 /** 577 * drm_framebuffer_remove - remove and unreference a framebuffer object 578 * @fb: framebuffer to remove 579 * 580 * Scans all the CRTCs and planes in @dev's mode_config. If they're 581 * using @fb, removes it, setting it to NULL. Then drops the reference to the 582 * passed-in framebuffer. Might take the modeset locks. 583 * 584 * Note that this function optimizes the cleanup away if the caller holds the 585 * last reference to the framebuffer. It is also guaranteed to not take the 586 * modeset locks in this case. 587 */ 588 void drm_framebuffer_remove(struct drm_framebuffer *fb) 589 { 590 struct drm_device *dev = fb->dev; 591 struct drm_crtc *crtc; 592 struct drm_plane *plane; 593 struct drm_mode_set set; 594 int ret; 595 596 WARN_ON(!list_empty(&fb->filp_head)); 597 598 /* 599 * drm ABI mandates that we remove any deleted framebuffers from active 600 * useage. But since most sane clients only remove framebuffers they no 601 * longer need, try to optimize this away. 602 * 603 * Since we're holding a reference ourselves, observing a refcount of 1 604 * means that we're the last holder and can skip it. Also, the refcount 605 * can never increase from 1 again, so we don't need any barriers or 606 * locks. 607 * 608 * Note that userspace could try to race with use and instate a new 609 * usage _after_ we've cleared all current ones. End result will be an 610 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot 611 * in this manner. 612 */ 613 if (atomic_read(&fb->refcount.refcount) > 1) { 614 drm_modeset_lock_all(dev); 615 /* remove from any CRTC */ 616 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 617 if (crtc->primary->fb == fb) { 618 /* should turn off the crtc */ 619 memset(&set, 0, sizeof(struct drm_mode_set)); 620 set.crtc = crtc; 621 set.fb = NULL; 622 ret = drm_mode_set_config_internal(&set); 623 if (ret) 624 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); 625 } 626 } 627 628 list_for_each_entry(plane, &dev->mode_config.plane_list, head) { 629 if (plane->fb == fb) 630 drm_plane_force_disable(plane); 631 } 632 drm_modeset_unlock_all(dev); 633 } 634 635 drm_framebuffer_unreference(fb); 636 } 637 EXPORT_SYMBOL(drm_framebuffer_remove); 638 639 DEFINE_WW_CLASS(crtc_ww_class); 640 641 /** 642 * drm_crtc_init_with_planes - Initialise a new CRTC object with 643 * specified primary and cursor planes. 644 * @dev: DRM device 645 * @crtc: CRTC object to init 646 * @primary: Primary plane for CRTC 647 * @cursor: Cursor plane for CRTC 648 * @funcs: callbacks for the new CRTC 649 * 650 * Inits a new object created as base part of a driver crtc object. 651 * 652 * Returns: 653 * Zero on success, error code on failure. 654 */ 655 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 656 struct drm_plane *primary, 657 struct drm_plane *cursor, 658 const struct drm_crtc_funcs *funcs) 659 { 660 struct drm_mode_config *config = &dev->mode_config; 661 int ret; 662 663 crtc->dev = dev; 664 crtc->funcs = funcs; 665 crtc->invert_dimensions = false; 666 667 drm_modeset_lock_init(&crtc->mutex); 668 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 669 if (ret) 670 return ret; 671 672 crtc->base.properties = &crtc->properties; 673 674 list_add_tail(&crtc->head, &config->crtc_list); 675 config->num_crtc++; 676 677 crtc->primary = primary; 678 crtc->cursor = cursor; 679 if (primary) 680 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 681 if (cursor) 682 cursor->possible_crtcs = 1 << drm_crtc_index(crtc); 683 684 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 685 drm_object_attach_property(&crtc->base, config->prop_active, 0); 686 } 687 688 return 0; 689 } 690 EXPORT_SYMBOL(drm_crtc_init_with_planes); 691 692 /** 693 * drm_crtc_cleanup - Clean up the core crtc usage 694 * @crtc: CRTC to cleanup 695 * 696 * This function cleans up @crtc and removes it from the DRM mode setting 697 * core. Note that the function does *not* free the crtc structure itself, 698 * this is the responsibility of the caller. 699 */ 700 void drm_crtc_cleanup(struct drm_crtc *crtc) 701 { 702 struct drm_device *dev = crtc->dev; 703 704 kfree(crtc->gamma_store); 705 crtc->gamma_store = NULL; 706 707 drm_modeset_lock_fini(&crtc->mutex); 708 709 drm_mode_object_put(dev, &crtc->base); 710 list_del(&crtc->head); 711 dev->mode_config.num_crtc--; 712 713 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); 714 if (crtc->state && crtc->funcs->atomic_destroy_state) 715 crtc->funcs->atomic_destroy_state(crtc, crtc->state); 716 717 memset(crtc, 0, sizeof(*crtc)); 718 } 719 EXPORT_SYMBOL(drm_crtc_cleanup); 720 721 /** 722 * drm_crtc_index - find the index of a registered CRTC 723 * @crtc: CRTC to find index for 724 * 725 * Given a registered CRTC, return the index of that CRTC within a DRM 726 * device's list of CRTCs. 727 */ 728 unsigned int drm_crtc_index(struct drm_crtc *crtc) 729 { 730 unsigned int index = 0; 731 struct drm_crtc *tmp; 732 733 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { 734 if (tmp == crtc) 735 return index; 736 737 index++; 738 } 739 740 BUG(); 741 } 742 EXPORT_SYMBOL(drm_crtc_index); 743 744 /* 745 * drm_mode_remove - remove and free a mode 746 * @connector: connector list to modify 747 * @mode: mode to remove 748 * 749 * Remove @mode from @connector's mode list, then free it. 750 */ 751 static void drm_mode_remove(struct drm_connector *connector, 752 struct drm_display_mode *mode) 753 { 754 list_del(&mode->head); 755 drm_mode_destroy(connector->dev, mode); 756 } 757 758 /** 759 * drm_display_info_set_bus_formats - set the supported bus formats 760 * @info: display info to store bus formats in 761 * @formats: array containing the supported bus formats 762 * @num_formats: the number of entries in the fmts array 763 * 764 * Store the supported bus formats in display info structure. 765 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for 766 * a full list of available formats. 767 */ 768 int drm_display_info_set_bus_formats(struct drm_display_info *info, 769 const u32 *formats, 770 unsigned int num_formats) 771 { 772 u32 *fmts = NULL; 773 774 if (!formats && num_formats) 775 return -EINVAL; 776 777 if (formats && num_formats) { 778 fmts = kmemdup(formats, sizeof(*formats) * num_formats, 779 GFP_KERNEL); 780 if (!fmts) 781 return -ENOMEM; 782 } 783 784 kfree(info->bus_formats); 785 info->bus_formats = fmts; 786 info->num_bus_formats = num_formats; 787 788 return 0; 789 } 790 EXPORT_SYMBOL(drm_display_info_set_bus_formats); 791 792 /** 793 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 794 * @connector: connector to quwery 795 * 796 * The kernel supports per-connector configration of its consoles through 797 * use of the video= parameter. This function parses that option and 798 * extracts the user's specified mode (or enable/disable status) for a 799 * particular connector. This is typically only used during the early fbdev 800 * setup. 801 */ 802 static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 803 { 804 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 805 char *option = NULL; 806 807 if (fb_get_options(connector->name, &option)) 808 return; 809 810 if (!drm_mode_parse_command_line_for_connector(option, 811 connector, 812 mode)) 813 return; 814 815 if (mode->force) { 816 const char *s; 817 818 switch (mode->force) { 819 case DRM_FORCE_OFF: 820 s = "OFF"; 821 break; 822 case DRM_FORCE_ON_DIGITAL: 823 s = "ON - dig"; 824 break; 825 default: 826 case DRM_FORCE_ON: 827 s = "ON"; 828 break; 829 } 830 831 DRM_INFO("forcing %s connector %s\n", connector->name, s); 832 connector->force = mode->force; 833 } 834 835 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 836 connector->name, 837 mode->xres, mode->yres, 838 mode->refresh_specified ? mode->refresh : 60, 839 mode->rb ? " reduced blanking" : "", 840 mode->margins ? " with margins" : "", 841 mode->interlace ? " interlaced" : ""); 842 } 843 844 /** 845 * drm_connector_init - Init a preallocated connector 846 * @dev: DRM device 847 * @connector: the connector to init 848 * @funcs: callbacks for this connector 849 * @connector_type: user visible type of the connector 850 * 851 * Initialises a preallocated connector. Connectors should be 852 * subclassed as part of driver connector objects. 853 * 854 * Returns: 855 * Zero on success, error code on failure. 856 */ 857 int drm_connector_init(struct drm_device *dev, 858 struct drm_connector *connector, 859 const struct drm_connector_funcs *funcs, 860 int connector_type) 861 { 862 struct drm_mode_config *config = &dev->mode_config; 863 int ret; 864 struct ida *connector_ida = 865 &drm_connector_enum_list[connector_type].ida; 866 867 drm_modeset_lock_all(dev); 868 869 ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false); 870 if (ret) 871 goto out_unlock; 872 873 connector->base.properties = &connector->properties; 874 connector->dev = dev; 875 connector->funcs = funcs; 876 connector->connector_type = connector_type; 877 connector->connector_type_id = 878 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); 879 if (connector->connector_type_id < 0) { 880 ret = connector->connector_type_id; 881 goto out_put; 882 } 883 connector->name = 884 kasprintf(GFP_KERNEL, "%s-%d", 885 drm_connector_enum_list[connector_type].name, 886 connector->connector_type_id); 887 if (!connector->name) { 888 ret = -ENOMEM; 889 goto out_put; 890 } 891 892 INIT_LIST_HEAD(&connector->probed_modes); 893 INIT_LIST_HEAD(&connector->modes); 894 connector->edid_blob_ptr = NULL; 895 connector->status = connector_status_unknown; 896 897 drm_connector_get_cmdline_mode(connector); 898 899 /* We should add connectors at the end to avoid upsetting the connector 900 * index too much. */ 901 list_add_tail(&connector->head, &config->connector_list); 902 config->num_connector++; 903 904 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 905 drm_object_attach_property(&connector->base, 906 config->edid_property, 907 0); 908 909 drm_object_attach_property(&connector->base, 910 config->dpms_property, 0); 911 912 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 913 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); 914 } 915 916 connector->debugfs_entry = NULL; 917 918 out_put: 919 if (ret) 920 drm_mode_object_put(dev, &connector->base); 921 922 out_unlock: 923 drm_modeset_unlock_all(dev); 924 925 return ret; 926 } 927 EXPORT_SYMBOL(drm_connector_init); 928 929 /** 930 * drm_connector_cleanup - cleans up an initialised connector 931 * @connector: connector to cleanup 932 * 933 * Cleans up the connector but doesn't free the object. 934 */ 935 void drm_connector_cleanup(struct drm_connector *connector) 936 { 937 struct drm_device *dev = connector->dev; 938 struct drm_display_mode *mode, *t; 939 940 if (connector->tile_group) { 941 drm_mode_put_tile_group(dev, connector->tile_group); 942 connector->tile_group = NULL; 943 } 944 945 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 946 drm_mode_remove(connector, mode); 947 948 list_for_each_entry_safe(mode, t, &connector->modes, head) 949 drm_mode_remove(connector, mode); 950 951 ida_remove(&drm_connector_enum_list[connector->connector_type].ida, 952 connector->connector_type_id); 953 954 kfree(connector->display_info.bus_formats); 955 drm_mode_object_put(dev, &connector->base); 956 kfree(connector->name); 957 connector->name = NULL; 958 list_del(&connector->head); 959 dev->mode_config.num_connector--; 960 961 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 962 if (connector->state && connector->funcs->atomic_destroy_state) 963 connector->funcs->atomic_destroy_state(connector, 964 connector->state); 965 966 memset(connector, 0, sizeof(*connector)); 967 } 968 EXPORT_SYMBOL(drm_connector_cleanup); 969 970 /** 971 * drm_connector_index - find the index of a registered connector 972 * @connector: connector to find index for 973 * 974 * Given a registered connector, return the index of that connector within a DRM 975 * device's list of connectors. 976 */ 977 unsigned int drm_connector_index(struct drm_connector *connector) 978 { 979 unsigned int index = 0; 980 struct drm_connector *tmp; 981 struct drm_mode_config *config = &connector->dev->mode_config; 982 983 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 984 985 list_for_each_entry(tmp, &connector->dev->mode_config.connector_list, head) { 986 if (tmp == connector) 987 return index; 988 989 index++; 990 } 991 992 BUG(); 993 } 994 EXPORT_SYMBOL(drm_connector_index); 995 996 /** 997 * drm_connector_register - register a connector 998 * @connector: the connector to register 999 * 1000 * Register userspace interfaces for a connector 1001 * 1002 * Returns: 1003 * Zero on success, error code on failure. 1004 */ 1005 int drm_connector_register(struct drm_connector *connector) 1006 { 1007 int ret; 1008 1009 drm_mode_object_register(connector->dev, &connector->base); 1010 1011 ret = drm_sysfs_connector_add(connector); 1012 if (ret) 1013 return ret; 1014 1015 ret = drm_debugfs_connector_add(connector); 1016 if (ret) { 1017 drm_sysfs_connector_remove(connector); 1018 return ret; 1019 } 1020 1021 return 0; 1022 } 1023 EXPORT_SYMBOL(drm_connector_register); 1024 1025 /** 1026 * drm_connector_unregister - unregister a connector 1027 * @connector: the connector to unregister 1028 * 1029 * Unregister userspace interfaces for a connector 1030 */ 1031 void drm_connector_unregister(struct drm_connector *connector) 1032 { 1033 drm_sysfs_connector_remove(connector); 1034 drm_debugfs_connector_remove(connector); 1035 } 1036 EXPORT_SYMBOL(drm_connector_unregister); 1037 1038 1039 /** 1040 * drm_connector_unplug_all - unregister connector userspace interfaces 1041 * @dev: drm device 1042 * 1043 * This function unregisters all connector userspace interfaces in sysfs. Should 1044 * be call when the device is disconnected, e.g. from an usb driver's 1045 * ->disconnect callback. 1046 */ 1047 void drm_connector_unplug_all(struct drm_device *dev) 1048 { 1049 struct drm_connector *connector; 1050 1051 /* taking the mode config mutex ends up in a clash with sysfs */ 1052 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1053 drm_connector_unregister(connector); 1054 1055 } 1056 EXPORT_SYMBOL(drm_connector_unplug_all); 1057 1058 /** 1059 * drm_encoder_init - Init a preallocated encoder 1060 * @dev: drm device 1061 * @encoder: the encoder to init 1062 * @funcs: callbacks for this encoder 1063 * @encoder_type: user visible type of the encoder 1064 * 1065 * Initialises a preallocated encoder. Encoder should be 1066 * subclassed as part of driver encoder objects. 1067 * 1068 * Returns: 1069 * Zero on success, error code on failure. 1070 */ 1071 int drm_encoder_init(struct drm_device *dev, 1072 struct drm_encoder *encoder, 1073 const struct drm_encoder_funcs *funcs, 1074 int encoder_type) 1075 { 1076 int ret; 1077 1078 drm_modeset_lock_all(dev); 1079 1080 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1081 if (ret) 1082 goto out_unlock; 1083 1084 encoder->dev = dev; 1085 encoder->encoder_type = encoder_type; 1086 encoder->funcs = funcs; 1087 encoder->name = kasprintf(GFP_KERNEL, "%s-%d", 1088 drm_encoder_enum_list[encoder_type].name, 1089 encoder->base.id); 1090 if (!encoder->name) { 1091 ret = -ENOMEM; 1092 goto out_put; 1093 } 1094 1095 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1096 dev->mode_config.num_encoder++; 1097 1098 out_put: 1099 if (ret) 1100 drm_mode_object_put(dev, &encoder->base); 1101 1102 out_unlock: 1103 drm_modeset_unlock_all(dev); 1104 1105 return ret; 1106 } 1107 EXPORT_SYMBOL(drm_encoder_init); 1108 1109 /** 1110 * drm_encoder_cleanup - cleans up an initialised encoder 1111 * @encoder: encoder to cleanup 1112 * 1113 * Cleans up the encoder but doesn't free the object. 1114 */ 1115 void drm_encoder_cleanup(struct drm_encoder *encoder) 1116 { 1117 struct drm_device *dev = encoder->dev; 1118 1119 drm_modeset_lock_all(dev); 1120 drm_mode_object_put(dev, &encoder->base); 1121 kfree(encoder->name); 1122 list_del(&encoder->head); 1123 dev->mode_config.num_encoder--; 1124 drm_modeset_unlock_all(dev); 1125 1126 memset(encoder, 0, sizeof(*encoder)); 1127 } 1128 EXPORT_SYMBOL(drm_encoder_cleanup); 1129 1130 /** 1131 * drm_universal_plane_init - Initialize a new universal plane object 1132 * @dev: DRM device 1133 * @plane: plane object to init 1134 * @possible_crtcs: bitmask of possible CRTCs 1135 * @funcs: callbacks for the new plane 1136 * @formats: array of supported formats (%DRM_FORMAT_*) 1137 * @format_count: number of elements in @formats 1138 * @type: type of plane (overlay, primary, cursor) 1139 * 1140 * Initializes a plane object of type @type. 1141 * 1142 * Returns: 1143 * Zero on success, error code on failure. 1144 */ 1145 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1146 unsigned long possible_crtcs, 1147 const struct drm_plane_funcs *funcs, 1148 const uint32_t *formats, uint32_t format_count, 1149 enum drm_plane_type type) 1150 { 1151 struct drm_mode_config *config = &dev->mode_config; 1152 int ret; 1153 1154 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1155 if (ret) 1156 return ret; 1157 1158 drm_modeset_lock_init(&plane->mutex); 1159 1160 plane->base.properties = &plane->properties; 1161 plane->dev = dev; 1162 plane->funcs = funcs; 1163 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t), 1164 GFP_KERNEL); 1165 if (!plane->format_types) { 1166 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1167 drm_mode_object_put(dev, &plane->base); 1168 return -ENOMEM; 1169 } 1170 1171 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1172 plane->format_count = format_count; 1173 plane->possible_crtcs = possible_crtcs; 1174 plane->type = type; 1175 1176 list_add_tail(&plane->head, &config->plane_list); 1177 config->num_total_plane++; 1178 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1179 config->num_overlay_plane++; 1180 1181 drm_object_attach_property(&plane->base, 1182 config->plane_type_property, 1183 plane->type); 1184 1185 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 1186 drm_object_attach_property(&plane->base, config->prop_fb_id, 0); 1187 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); 1188 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); 1189 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); 1190 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); 1191 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); 1192 drm_object_attach_property(&plane->base, config->prop_src_x, 0); 1193 drm_object_attach_property(&plane->base, config->prop_src_y, 0); 1194 drm_object_attach_property(&plane->base, config->prop_src_w, 0); 1195 drm_object_attach_property(&plane->base, config->prop_src_h, 0); 1196 } 1197 1198 return 0; 1199 } 1200 EXPORT_SYMBOL(drm_universal_plane_init); 1201 1202 /** 1203 * drm_plane_init - Initialize a legacy plane 1204 * @dev: DRM device 1205 * @plane: plane object to init 1206 * @possible_crtcs: bitmask of possible CRTCs 1207 * @funcs: callbacks for the new plane 1208 * @formats: array of supported formats (%DRM_FORMAT_*) 1209 * @format_count: number of elements in @formats 1210 * @is_primary: plane type (primary vs overlay) 1211 * 1212 * Legacy API to initialize a DRM plane. 1213 * 1214 * New drivers should call drm_universal_plane_init() instead. 1215 * 1216 * Returns: 1217 * Zero on success, error code on failure. 1218 */ 1219 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1220 unsigned long possible_crtcs, 1221 const struct drm_plane_funcs *funcs, 1222 const uint32_t *formats, uint32_t format_count, 1223 bool is_primary) 1224 { 1225 enum drm_plane_type type; 1226 1227 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1228 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1229 formats, format_count, type); 1230 } 1231 EXPORT_SYMBOL(drm_plane_init); 1232 1233 /** 1234 * drm_plane_cleanup - Clean up the core plane usage 1235 * @plane: plane to cleanup 1236 * 1237 * This function cleans up @plane and removes it from the DRM mode setting 1238 * core. Note that the function does *not* free the plane structure itself, 1239 * this is the responsibility of the caller. 1240 */ 1241 void drm_plane_cleanup(struct drm_plane *plane) 1242 { 1243 struct drm_device *dev = plane->dev; 1244 1245 drm_modeset_lock_all(dev); 1246 kfree(plane->format_types); 1247 drm_mode_object_put(dev, &plane->base); 1248 1249 BUG_ON(list_empty(&plane->head)); 1250 1251 list_del(&plane->head); 1252 dev->mode_config.num_total_plane--; 1253 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1254 dev->mode_config.num_overlay_plane--; 1255 drm_modeset_unlock_all(dev); 1256 1257 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1258 if (plane->state && plane->funcs->atomic_destroy_state) 1259 plane->funcs->atomic_destroy_state(plane, plane->state); 1260 1261 memset(plane, 0, sizeof(*plane)); 1262 } 1263 EXPORT_SYMBOL(drm_plane_cleanup); 1264 1265 /** 1266 * drm_plane_index - find the index of a registered plane 1267 * @plane: plane to find index for 1268 * 1269 * Given a registered plane, return the index of that CRTC within a DRM 1270 * device's list of planes. 1271 */ 1272 unsigned int drm_plane_index(struct drm_plane *plane) 1273 { 1274 unsigned int index = 0; 1275 struct drm_plane *tmp; 1276 1277 list_for_each_entry(tmp, &plane->dev->mode_config.plane_list, head) { 1278 if (tmp == plane) 1279 return index; 1280 1281 index++; 1282 } 1283 1284 BUG(); 1285 } 1286 EXPORT_SYMBOL(drm_plane_index); 1287 1288 /** 1289 * drm_plane_force_disable - Forcibly disable a plane 1290 * @plane: plane to disable 1291 * 1292 * Forces the plane to be disabled. 1293 * 1294 * Used when the plane's current framebuffer is destroyed, 1295 * and when restoring fbdev mode. 1296 */ 1297 void drm_plane_force_disable(struct drm_plane *plane) 1298 { 1299 int ret; 1300 1301 if (!plane->fb) 1302 return; 1303 1304 plane->old_fb = plane->fb; 1305 ret = plane->funcs->disable_plane(plane); 1306 if (ret) { 1307 DRM_ERROR("failed to disable plane with busy fb\n"); 1308 plane->old_fb = NULL; 1309 return; 1310 } 1311 /* disconnect the plane from the fb and crtc: */ 1312 drm_framebuffer_unreference(plane->old_fb); 1313 plane->old_fb = NULL; 1314 plane->fb = NULL; 1315 plane->crtc = NULL; 1316 } 1317 EXPORT_SYMBOL(drm_plane_force_disable); 1318 1319 static int drm_mode_create_standard_properties(struct drm_device *dev) 1320 { 1321 struct drm_property *prop; 1322 1323 /* 1324 * Standard properties (apply to all connectors) 1325 */ 1326 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1327 DRM_MODE_PROP_IMMUTABLE, 1328 "EDID", 0); 1329 if (!prop) 1330 return -ENOMEM; 1331 dev->mode_config.edid_property = prop; 1332 1333 prop = drm_property_create_enum(dev, 0, 1334 "DPMS", drm_dpms_enum_list, 1335 ARRAY_SIZE(drm_dpms_enum_list)); 1336 if (!prop) 1337 return -ENOMEM; 1338 dev->mode_config.dpms_property = prop; 1339 1340 prop = drm_property_create(dev, 1341 DRM_MODE_PROP_BLOB | 1342 DRM_MODE_PROP_IMMUTABLE, 1343 "PATH", 0); 1344 if (!prop) 1345 return -ENOMEM; 1346 dev->mode_config.path_property = prop; 1347 1348 prop = drm_property_create(dev, 1349 DRM_MODE_PROP_BLOB | 1350 DRM_MODE_PROP_IMMUTABLE, 1351 "TILE", 0); 1352 if (!prop) 1353 return -ENOMEM; 1354 dev->mode_config.tile_property = prop; 1355 1356 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1357 "type", drm_plane_type_enum_list, 1358 ARRAY_SIZE(drm_plane_type_enum_list)); 1359 if (!prop) 1360 return -ENOMEM; 1361 dev->mode_config.plane_type_property = prop; 1362 1363 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1364 "SRC_X", 0, UINT_MAX); 1365 if (!prop) 1366 return -ENOMEM; 1367 dev->mode_config.prop_src_x = prop; 1368 1369 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1370 "SRC_Y", 0, UINT_MAX); 1371 if (!prop) 1372 return -ENOMEM; 1373 dev->mode_config.prop_src_y = prop; 1374 1375 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1376 "SRC_W", 0, UINT_MAX); 1377 if (!prop) 1378 return -ENOMEM; 1379 dev->mode_config.prop_src_w = prop; 1380 1381 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1382 "SRC_H", 0, UINT_MAX); 1383 if (!prop) 1384 return -ENOMEM; 1385 dev->mode_config.prop_src_h = prop; 1386 1387 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1388 "CRTC_X", INT_MIN, INT_MAX); 1389 if (!prop) 1390 return -ENOMEM; 1391 dev->mode_config.prop_crtc_x = prop; 1392 1393 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1394 "CRTC_Y", INT_MIN, INT_MAX); 1395 if (!prop) 1396 return -ENOMEM; 1397 dev->mode_config.prop_crtc_y = prop; 1398 1399 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1400 "CRTC_W", 0, INT_MAX); 1401 if (!prop) 1402 return -ENOMEM; 1403 dev->mode_config.prop_crtc_w = prop; 1404 1405 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1406 "CRTC_H", 0, INT_MAX); 1407 if (!prop) 1408 return -ENOMEM; 1409 dev->mode_config.prop_crtc_h = prop; 1410 1411 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1412 "FB_ID", DRM_MODE_OBJECT_FB); 1413 if (!prop) 1414 return -ENOMEM; 1415 dev->mode_config.prop_fb_id = prop; 1416 1417 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1418 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 1419 if (!prop) 1420 return -ENOMEM; 1421 dev->mode_config.prop_crtc_id = prop; 1422 1423 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 1424 "ACTIVE"); 1425 if (!prop) 1426 return -ENOMEM; 1427 dev->mode_config.prop_active = prop; 1428 1429 return 0; 1430 } 1431 1432 /** 1433 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1434 * @dev: DRM device 1435 * 1436 * Called by a driver the first time a DVI-I connector is made. 1437 */ 1438 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1439 { 1440 struct drm_property *dvi_i_selector; 1441 struct drm_property *dvi_i_subconnector; 1442 1443 if (dev->mode_config.dvi_i_select_subconnector_property) 1444 return 0; 1445 1446 dvi_i_selector = 1447 drm_property_create_enum(dev, 0, 1448 "select subconnector", 1449 drm_dvi_i_select_enum_list, 1450 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1451 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1452 1453 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1454 "subconnector", 1455 drm_dvi_i_subconnector_enum_list, 1456 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1457 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1458 1459 return 0; 1460 } 1461 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1462 1463 /** 1464 * drm_create_tv_properties - create TV specific connector properties 1465 * @dev: DRM device 1466 * @num_modes: number of different TV formats (modes) supported 1467 * @modes: array of pointers to strings containing name of each format 1468 * 1469 * Called by a driver's TV initialization routine, this function creates 1470 * the TV specific connector properties for a given device. Caller is 1471 * responsible for allocating a list of format names and passing them to 1472 * this routine. 1473 */ 1474 int drm_mode_create_tv_properties(struct drm_device *dev, 1475 unsigned int num_modes, 1476 char *modes[]) 1477 { 1478 struct drm_property *tv_selector; 1479 struct drm_property *tv_subconnector; 1480 unsigned int i; 1481 1482 if (dev->mode_config.tv_select_subconnector_property) 1483 return 0; 1484 1485 /* 1486 * Basic connector properties 1487 */ 1488 tv_selector = drm_property_create_enum(dev, 0, 1489 "select subconnector", 1490 drm_tv_select_enum_list, 1491 ARRAY_SIZE(drm_tv_select_enum_list)); 1492 dev->mode_config.tv_select_subconnector_property = tv_selector; 1493 1494 tv_subconnector = 1495 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1496 "subconnector", 1497 drm_tv_subconnector_enum_list, 1498 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1499 dev->mode_config.tv_subconnector_property = tv_subconnector; 1500 1501 /* 1502 * Other, TV specific properties: margins & TV modes. 1503 */ 1504 dev->mode_config.tv_left_margin_property = 1505 drm_property_create_range(dev, 0, "left margin", 0, 100); 1506 1507 dev->mode_config.tv_right_margin_property = 1508 drm_property_create_range(dev, 0, "right margin", 0, 100); 1509 1510 dev->mode_config.tv_top_margin_property = 1511 drm_property_create_range(dev, 0, "top margin", 0, 100); 1512 1513 dev->mode_config.tv_bottom_margin_property = 1514 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1515 1516 dev->mode_config.tv_mode_property = 1517 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1518 "mode", num_modes); 1519 for (i = 0; i < num_modes; i++) 1520 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1521 i, modes[i]); 1522 1523 dev->mode_config.tv_brightness_property = 1524 drm_property_create_range(dev, 0, "brightness", 0, 100); 1525 1526 dev->mode_config.tv_contrast_property = 1527 drm_property_create_range(dev, 0, "contrast", 0, 100); 1528 1529 dev->mode_config.tv_flicker_reduction_property = 1530 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1531 1532 dev->mode_config.tv_overscan_property = 1533 drm_property_create_range(dev, 0, "overscan", 0, 100); 1534 1535 dev->mode_config.tv_saturation_property = 1536 drm_property_create_range(dev, 0, "saturation", 0, 100); 1537 1538 dev->mode_config.tv_hue_property = 1539 drm_property_create_range(dev, 0, "hue", 0, 100); 1540 1541 return 0; 1542 } 1543 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1544 1545 /** 1546 * drm_mode_create_scaling_mode_property - create scaling mode property 1547 * @dev: DRM device 1548 * 1549 * Called by a driver the first time it's needed, must be attached to desired 1550 * connectors. 1551 */ 1552 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1553 { 1554 struct drm_property *scaling_mode; 1555 1556 if (dev->mode_config.scaling_mode_property) 1557 return 0; 1558 1559 scaling_mode = 1560 drm_property_create_enum(dev, 0, "scaling mode", 1561 drm_scaling_mode_enum_list, 1562 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1563 1564 dev->mode_config.scaling_mode_property = scaling_mode; 1565 1566 return 0; 1567 } 1568 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1569 1570 /** 1571 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1572 * @dev: DRM device 1573 * 1574 * Called by a driver the first time it's needed, must be attached to desired 1575 * connectors. 1576 * 1577 * Returns: 1578 * Zero on success, negative errno on failure. 1579 */ 1580 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1581 { 1582 if (dev->mode_config.aspect_ratio_property) 1583 return 0; 1584 1585 dev->mode_config.aspect_ratio_property = 1586 drm_property_create_enum(dev, 0, "aspect ratio", 1587 drm_aspect_ratio_enum_list, 1588 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1589 1590 if (dev->mode_config.aspect_ratio_property == NULL) 1591 return -ENOMEM; 1592 1593 return 0; 1594 } 1595 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1596 1597 /** 1598 * drm_mode_create_dirty_property - create dirty property 1599 * @dev: DRM device 1600 * 1601 * Called by a driver the first time it's needed, must be attached to desired 1602 * connectors. 1603 */ 1604 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1605 { 1606 struct drm_property *dirty_info; 1607 1608 if (dev->mode_config.dirty_info_property) 1609 return 0; 1610 1611 dirty_info = 1612 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1613 "dirty", 1614 drm_dirty_info_enum_list, 1615 ARRAY_SIZE(drm_dirty_info_enum_list)); 1616 dev->mode_config.dirty_info_property = dirty_info; 1617 1618 return 0; 1619 } 1620 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1621 1622 /** 1623 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1624 * @dev: DRM device 1625 * 1626 * Create the the suggested x/y offset property for connectors. 1627 */ 1628 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1629 { 1630 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1631 return 0; 1632 1633 dev->mode_config.suggested_x_property = 1634 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1635 1636 dev->mode_config.suggested_y_property = 1637 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1638 1639 if (dev->mode_config.suggested_x_property == NULL || 1640 dev->mode_config.suggested_y_property == NULL) 1641 return -ENOMEM; 1642 return 0; 1643 } 1644 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1645 1646 static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group) 1647 { 1648 uint32_t total_objects = 0; 1649 1650 total_objects += dev->mode_config.num_crtc; 1651 total_objects += dev->mode_config.num_connector; 1652 total_objects += dev->mode_config.num_encoder; 1653 1654 group->id_list = kcalloc(total_objects, sizeof(uint32_t), GFP_KERNEL); 1655 if (!group->id_list) 1656 return -ENOMEM; 1657 1658 group->num_crtcs = 0; 1659 group->num_connectors = 0; 1660 group->num_encoders = 0; 1661 return 0; 1662 } 1663 1664 void drm_mode_group_destroy(struct drm_mode_group *group) 1665 { 1666 kfree(group->id_list); 1667 group->id_list = NULL; 1668 } 1669 1670 /* 1671 * NOTE: Driver's shouldn't ever call drm_mode_group_init_legacy_group - it is 1672 * the drm core's responsibility to set up mode control groups. 1673 */ 1674 int drm_mode_group_init_legacy_group(struct drm_device *dev, 1675 struct drm_mode_group *group) 1676 { 1677 struct drm_crtc *crtc; 1678 struct drm_encoder *encoder; 1679 struct drm_connector *connector; 1680 int ret; 1681 1682 ret = drm_mode_group_init(dev, group); 1683 if (ret) 1684 return ret; 1685 1686 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 1687 group->id_list[group->num_crtcs++] = crtc->base.id; 1688 1689 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 1690 group->id_list[group->num_crtcs + group->num_encoders++] = 1691 encoder->base.id; 1692 1693 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1694 group->id_list[group->num_crtcs + group->num_encoders + 1695 group->num_connectors++] = connector->base.id; 1696 1697 return 0; 1698 } 1699 EXPORT_SYMBOL(drm_mode_group_init_legacy_group); 1700 1701 void drm_reinit_primary_mode_group(struct drm_device *dev) 1702 { 1703 drm_modeset_lock_all(dev); 1704 drm_mode_group_destroy(&dev->primary->mode_group); 1705 drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group); 1706 drm_modeset_unlock_all(dev); 1707 } 1708 EXPORT_SYMBOL(drm_reinit_primary_mode_group); 1709 1710 /** 1711 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1712 * @out: drm_mode_modeinfo struct to return to the user 1713 * @in: drm_display_mode to use 1714 * 1715 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1716 * the user. 1717 */ 1718 static void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out, 1719 const struct drm_display_mode *in) 1720 { 1721 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || 1722 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || 1723 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || 1724 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || 1725 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, 1726 "timing values too large for mode info\n"); 1727 1728 out->clock = in->clock; 1729 out->hdisplay = in->hdisplay; 1730 out->hsync_start = in->hsync_start; 1731 out->hsync_end = in->hsync_end; 1732 out->htotal = in->htotal; 1733 out->hskew = in->hskew; 1734 out->vdisplay = in->vdisplay; 1735 out->vsync_start = in->vsync_start; 1736 out->vsync_end = in->vsync_end; 1737 out->vtotal = in->vtotal; 1738 out->vscan = in->vscan; 1739 out->vrefresh = in->vrefresh; 1740 out->flags = in->flags; 1741 out->type = in->type; 1742 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1743 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1744 } 1745 1746 /** 1747 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 1748 * @out: drm_display_mode to return to the user 1749 * @in: drm_mode_modeinfo to use 1750 * 1751 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 1752 * the caller. 1753 * 1754 * Returns: 1755 * Zero on success, negative errno on failure. 1756 */ 1757 static int drm_crtc_convert_umode(struct drm_display_mode *out, 1758 const struct drm_mode_modeinfo *in) 1759 { 1760 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) 1761 return -ERANGE; 1762 1763 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1764 return -EINVAL; 1765 1766 out->clock = in->clock; 1767 out->hdisplay = in->hdisplay; 1768 out->hsync_start = in->hsync_start; 1769 out->hsync_end = in->hsync_end; 1770 out->htotal = in->htotal; 1771 out->hskew = in->hskew; 1772 out->vdisplay = in->vdisplay; 1773 out->vsync_start = in->vsync_start; 1774 out->vsync_end = in->vsync_end; 1775 out->vtotal = in->vtotal; 1776 out->vscan = in->vscan; 1777 out->vrefresh = in->vrefresh; 1778 out->flags = in->flags; 1779 out->type = in->type; 1780 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1781 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1782 1783 return 0; 1784 } 1785 1786 /** 1787 * drm_mode_getresources - get graphics configuration 1788 * @dev: drm device for the ioctl 1789 * @data: data pointer for the ioctl 1790 * @file_priv: drm file for the ioctl call 1791 * 1792 * Construct a set of configuration description structures and return 1793 * them to the user, including CRTC, connector and framebuffer configuration. 1794 * 1795 * Called by the user via ioctl. 1796 * 1797 * Returns: 1798 * Zero on success, negative errno on failure. 1799 */ 1800 int drm_mode_getresources(struct drm_device *dev, void *data, 1801 struct drm_file *file_priv) 1802 { 1803 struct drm_mode_card_res *card_res = data; 1804 struct list_head *lh; 1805 struct drm_framebuffer *fb; 1806 struct drm_connector *connector; 1807 struct drm_crtc *crtc; 1808 struct drm_encoder *encoder; 1809 int ret = 0; 1810 int connector_count = 0; 1811 int crtc_count = 0; 1812 int fb_count = 0; 1813 int encoder_count = 0; 1814 int copied = 0, i; 1815 uint32_t __user *fb_id; 1816 uint32_t __user *crtc_id; 1817 uint32_t __user *connector_id; 1818 uint32_t __user *encoder_id; 1819 struct drm_mode_group *mode_group; 1820 1821 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1822 return -EINVAL; 1823 1824 1825 mutex_lock(&file_priv->fbs_lock); 1826 /* 1827 * For the non-control nodes we need to limit the list of resources 1828 * by IDs in the group list for this node 1829 */ 1830 list_for_each(lh, &file_priv->fbs) 1831 fb_count++; 1832 1833 /* handle this in 4 parts */ 1834 /* FBs */ 1835 if (card_res->count_fbs >= fb_count) { 1836 copied = 0; 1837 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1838 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1839 if (put_user(fb->base.id, fb_id + copied)) { 1840 mutex_unlock(&file_priv->fbs_lock); 1841 return -EFAULT; 1842 } 1843 copied++; 1844 } 1845 } 1846 card_res->count_fbs = fb_count; 1847 mutex_unlock(&file_priv->fbs_lock); 1848 1849 /* mode_config.mutex protects the connector list against e.g. DP MST 1850 * connector hot-adding. CRTC/Plane lists are invariant. */ 1851 mutex_lock(&dev->mode_config.mutex); 1852 if (!drm_is_primary_client(file_priv)) { 1853 1854 mode_group = NULL; 1855 list_for_each(lh, &dev->mode_config.crtc_list) 1856 crtc_count++; 1857 1858 list_for_each(lh, &dev->mode_config.connector_list) 1859 connector_count++; 1860 1861 list_for_each(lh, &dev->mode_config.encoder_list) 1862 encoder_count++; 1863 } else { 1864 1865 mode_group = &file_priv->master->minor->mode_group; 1866 crtc_count = mode_group->num_crtcs; 1867 connector_count = mode_group->num_connectors; 1868 encoder_count = mode_group->num_encoders; 1869 } 1870 1871 card_res->max_height = dev->mode_config.max_height; 1872 card_res->min_height = dev->mode_config.min_height; 1873 card_res->max_width = dev->mode_config.max_width; 1874 card_res->min_width = dev->mode_config.min_width; 1875 1876 /* CRTCs */ 1877 if (card_res->count_crtcs >= crtc_count) { 1878 copied = 0; 1879 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1880 if (!mode_group) { 1881 list_for_each_entry(crtc, &dev->mode_config.crtc_list, 1882 head) { 1883 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 1884 if (put_user(crtc->base.id, crtc_id + copied)) { 1885 ret = -EFAULT; 1886 goto out; 1887 } 1888 copied++; 1889 } 1890 } else { 1891 for (i = 0; i < mode_group->num_crtcs; i++) { 1892 if (put_user(mode_group->id_list[i], 1893 crtc_id + copied)) { 1894 ret = -EFAULT; 1895 goto out; 1896 } 1897 copied++; 1898 } 1899 } 1900 } 1901 card_res->count_crtcs = crtc_count; 1902 1903 /* Encoders */ 1904 if (card_res->count_encoders >= encoder_count) { 1905 copied = 0; 1906 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1907 if (!mode_group) { 1908 list_for_each_entry(encoder, 1909 &dev->mode_config.encoder_list, 1910 head) { 1911 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1912 encoder->name); 1913 if (put_user(encoder->base.id, encoder_id + 1914 copied)) { 1915 ret = -EFAULT; 1916 goto out; 1917 } 1918 copied++; 1919 } 1920 } else { 1921 for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) { 1922 if (put_user(mode_group->id_list[i], 1923 encoder_id + copied)) { 1924 ret = -EFAULT; 1925 goto out; 1926 } 1927 copied++; 1928 } 1929 1930 } 1931 } 1932 card_res->count_encoders = encoder_count; 1933 1934 /* Connectors */ 1935 if (card_res->count_connectors >= connector_count) { 1936 copied = 0; 1937 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1938 if (!mode_group) { 1939 list_for_each_entry(connector, 1940 &dev->mode_config.connector_list, 1941 head) { 1942 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1943 connector->base.id, 1944 connector->name); 1945 if (put_user(connector->base.id, 1946 connector_id + copied)) { 1947 ret = -EFAULT; 1948 goto out; 1949 } 1950 copied++; 1951 } 1952 } else { 1953 int start = mode_group->num_crtcs + 1954 mode_group->num_encoders; 1955 for (i = start; i < start + mode_group->num_connectors; i++) { 1956 if (put_user(mode_group->id_list[i], 1957 connector_id + copied)) { 1958 ret = -EFAULT; 1959 goto out; 1960 } 1961 copied++; 1962 } 1963 } 1964 } 1965 card_res->count_connectors = connector_count; 1966 1967 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1968 card_res->count_connectors, card_res->count_encoders); 1969 1970 out: 1971 mutex_unlock(&dev->mode_config.mutex); 1972 return ret; 1973 } 1974 1975 /** 1976 * drm_mode_getcrtc - get CRTC configuration 1977 * @dev: drm device for the ioctl 1978 * @data: data pointer for the ioctl 1979 * @file_priv: drm file for the ioctl call 1980 * 1981 * Construct a CRTC configuration structure to return to the user. 1982 * 1983 * Called by the user via ioctl. 1984 * 1985 * Returns: 1986 * Zero on success, negative errno on failure. 1987 */ 1988 int drm_mode_getcrtc(struct drm_device *dev, 1989 void *data, struct drm_file *file_priv) 1990 { 1991 struct drm_mode_crtc *crtc_resp = data; 1992 struct drm_crtc *crtc; 1993 1994 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1995 return -EINVAL; 1996 1997 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 1998 if (!crtc) 1999 return -ENOENT; 2000 2001 drm_modeset_lock_crtc(crtc, crtc->primary); 2002 crtc_resp->x = crtc->x; 2003 crtc_resp->y = crtc->y; 2004 crtc_resp->gamma_size = crtc->gamma_size; 2005 if (crtc->primary->fb) 2006 crtc_resp->fb_id = crtc->primary->fb->base.id; 2007 else 2008 crtc_resp->fb_id = 0; 2009 2010 if (crtc->enabled) { 2011 2012 drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->mode); 2013 crtc_resp->mode_valid = 1; 2014 2015 } else { 2016 crtc_resp->mode_valid = 0; 2017 } 2018 drm_modeset_unlock_crtc(crtc); 2019 2020 return 0; 2021 } 2022 2023 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 2024 const struct drm_file *file_priv) 2025 { 2026 /* 2027 * If user-space hasn't configured the driver to expose the stereo 3D 2028 * modes, don't expose them. 2029 */ 2030 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 2031 return false; 2032 2033 return true; 2034 } 2035 2036 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 2037 { 2038 /* For atomic drivers only state objects are synchronously updated and 2039 * protected by modeset locks, so check those first. */ 2040 if (connector->state) 2041 return connector->state->best_encoder; 2042 return connector->encoder; 2043 } 2044 2045 /* helper for getconnector and getproperties ioctls */ 2046 static int get_properties(struct drm_mode_object *obj, bool atomic, 2047 uint32_t __user *prop_ptr, uint64_t __user *prop_values, 2048 uint32_t *arg_count_props) 2049 { 2050 int props_count; 2051 int i, ret, copied; 2052 2053 props_count = obj->properties->count; 2054 if (!atomic) 2055 props_count -= obj->properties->atomic_count; 2056 2057 if ((*arg_count_props >= props_count) && props_count) { 2058 for (i = 0, copied = 0; copied < props_count; i++) { 2059 struct drm_property *prop = obj->properties->properties[i]; 2060 uint64_t val; 2061 2062 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) 2063 continue; 2064 2065 ret = drm_object_property_get_value(obj, prop, &val); 2066 if (ret) 2067 return ret; 2068 2069 if (put_user(prop->base.id, prop_ptr + copied)) 2070 return -EFAULT; 2071 2072 if (put_user(val, prop_values + copied)) 2073 return -EFAULT; 2074 2075 copied++; 2076 } 2077 } 2078 *arg_count_props = props_count; 2079 2080 return 0; 2081 } 2082 2083 /** 2084 * drm_mode_getconnector - get connector configuration 2085 * @dev: drm device for the ioctl 2086 * @data: data pointer for the ioctl 2087 * @file_priv: drm file for the ioctl call 2088 * 2089 * Construct a connector configuration structure to return to the user. 2090 * 2091 * Called by the user via ioctl. 2092 * 2093 * Returns: 2094 * Zero on success, negative errno on failure. 2095 */ 2096 int drm_mode_getconnector(struct drm_device *dev, void *data, 2097 struct drm_file *file_priv) 2098 { 2099 struct drm_mode_get_connector *out_resp = data; 2100 struct drm_connector *connector; 2101 struct drm_encoder *encoder; 2102 struct drm_display_mode *mode; 2103 int mode_count = 0; 2104 int encoders_count = 0; 2105 int ret = 0; 2106 int copied = 0; 2107 int i; 2108 struct drm_mode_modeinfo u_mode; 2109 struct drm_mode_modeinfo __user *mode_ptr; 2110 uint32_t __user *encoder_ptr; 2111 2112 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2113 return -EINVAL; 2114 2115 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2116 2117 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 2118 2119 mutex_lock(&dev->mode_config.mutex); 2120 2121 connector = drm_connector_find(dev, out_resp->connector_id); 2122 if (!connector) { 2123 ret = -ENOENT; 2124 goto out; 2125 } 2126 2127 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) 2128 if (connector->encoder_ids[i] != 0) 2129 encoders_count++; 2130 2131 if (out_resp->count_modes == 0) { 2132 connector->funcs->fill_modes(connector, 2133 dev->mode_config.max_width, 2134 dev->mode_config.max_height); 2135 } 2136 2137 /* delayed so we get modes regardless of pre-fill_modes state */ 2138 list_for_each_entry(mode, &connector->modes, head) 2139 if (drm_mode_expose_to_userspace(mode, file_priv)) 2140 mode_count++; 2141 2142 out_resp->connector_id = connector->base.id; 2143 out_resp->connector_type = connector->connector_type; 2144 out_resp->connector_type_id = connector->connector_type_id; 2145 out_resp->mm_width = connector->display_info.width_mm; 2146 out_resp->mm_height = connector->display_info.height_mm; 2147 out_resp->subpixel = connector->display_info.subpixel_order; 2148 out_resp->connection = connector->status; 2149 2150 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2151 encoder = drm_connector_get_encoder(connector); 2152 if (encoder) 2153 out_resp->encoder_id = encoder->base.id; 2154 else 2155 out_resp->encoder_id = 0; 2156 2157 /* 2158 * This ioctl is called twice, once to determine how much space is 2159 * needed, and the 2nd time to fill it. 2160 */ 2161 if ((out_resp->count_modes >= mode_count) && mode_count) { 2162 copied = 0; 2163 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2164 list_for_each_entry(mode, &connector->modes, head) { 2165 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2166 continue; 2167 2168 drm_crtc_convert_to_umode(&u_mode, mode); 2169 if (copy_to_user(mode_ptr + copied, 2170 &u_mode, sizeof(u_mode))) { 2171 ret = -EFAULT; 2172 goto out; 2173 } 2174 copied++; 2175 } 2176 } 2177 out_resp->count_modes = mode_count; 2178 2179 ret = get_properties(&connector->base, file_priv->atomic, 2180 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2181 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2182 &out_resp->count_props); 2183 if (ret) 2184 goto out; 2185 2186 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2187 copied = 0; 2188 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2189 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2190 if (connector->encoder_ids[i] != 0) { 2191 if (put_user(connector->encoder_ids[i], 2192 encoder_ptr + copied)) { 2193 ret = -EFAULT; 2194 goto out; 2195 } 2196 copied++; 2197 } 2198 } 2199 } 2200 out_resp->count_encoders = encoders_count; 2201 2202 out: 2203 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2204 mutex_unlock(&dev->mode_config.mutex); 2205 2206 return ret; 2207 } 2208 2209 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2210 { 2211 struct drm_connector *connector; 2212 struct drm_device *dev = encoder->dev; 2213 bool uses_atomic = false; 2214 2215 /* For atomic drivers only state objects are synchronously updated and 2216 * protected by modeset locks, so check those first. */ 2217 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 2218 if (!connector->state) 2219 continue; 2220 2221 uses_atomic = true; 2222 2223 if (connector->state->best_encoder != encoder) 2224 continue; 2225 2226 return connector->state->crtc; 2227 } 2228 2229 /* Don't return stale data (e.g. pending async disable). */ 2230 if (uses_atomic) 2231 return NULL; 2232 2233 return encoder->crtc; 2234 } 2235 2236 /** 2237 * drm_mode_getencoder - get encoder configuration 2238 * @dev: drm device for the ioctl 2239 * @data: data pointer for the ioctl 2240 * @file_priv: drm file for the ioctl call 2241 * 2242 * Construct a encoder configuration structure to return to the user. 2243 * 2244 * Called by the user via ioctl. 2245 * 2246 * Returns: 2247 * Zero on success, negative errno on failure. 2248 */ 2249 int drm_mode_getencoder(struct drm_device *dev, void *data, 2250 struct drm_file *file_priv) 2251 { 2252 struct drm_mode_get_encoder *enc_resp = data; 2253 struct drm_encoder *encoder; 2254 struct drm_crtc *crtc; 2255 2256 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2257 return -EINVAL; 2258 2259 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2260 if (!encoder) 2261 return -ENOENT; 2262 2263 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2264 crtc = drm_encoder_get_crtc(encoder); 2265 if (crtc) 2266 enc_resp->crtc_id = crtc->base.id; 2267 else if (encoder->crtc) 2268 enc_resp->crtc_id = encoder->crtc->base.id; 2269 else 2270 enc_resp->crtc_id = 0; 2271 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2272 2273 enc_resp->encoder_type = encoder->encoder_type; 2274 enc_resp->encoder_id = encoder->base.id; 2275 enc_resp->possible_crtcs = encoder->possible_crtcs; 2276 enc_resp->possible_clones = encoder->possible_clones; 2277 2278 return 0; 2279 } 2280 2281 /** 2282 * drm_mode_getplane_res - enumerate all plane resources 2283 * @dev: DRM device 2284 * @data: ioctl data 2285 * @file_priv: DRM file info 2286 * 2287 * Construct a list of plane ids to return to the user. 2288 * 2289 * Called by the user via ioctl. 2290 * 2291 * Returns: 2292 * Zero on success, negative errno on failure. 2293 */ 2294 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2295 struct drm_file *file_priv) 2296 { 2297 struct drm_mode_get_plane_res *plane_resp = data; 2298 struct drm_mode_config *config; 2299 struct drm_plane *plane; 2300 uint32_t __user *plane_ptr; 2301 int copied = 0; 2302 unsigned num_planes; 2303 2304 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2305 return -EINVAL; 2306 2307 config = &dev->mode_config; 2308 2309 if (file_priv->universal_planes) 2310 num_planes = config->num_total_plane; 2311 else 2312 num_planes = config->num_overlay_plane; 2313 2314 /* 2315 * This ioctl is called twice, once to determine how much space is 2316 * needed, and the 2nd time to fill it. 2317 */ 2318 if (num_planes && 2319 (plane_resp->count_planes >= num_planes)) { 2320 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2321 2322 /* Plane lists are invariant, no locking needed. */ 2323 list_for_each_entry(plane, &config->plane_list, head) { 2324 /* 2325 * Unless userspace set the 'universal planes' 2326 * capability bit, only advertise overlays. 2327 */ 2328 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2329 !file_priv->universal_planes) 2330 continue; 2331 2332 if (put_user(plane->base.id, plane_ptr + copied)) 2333 return -EFAULT; 2334 copied++; 2335 } 2336 } 2337 plane_resp->count_planes = num_planes; 2338 2339 return 0; 2340 } 2341 2342 /** 2343 * drm_mode_getplane - get plane configuration 2344 * @dev: DRM device 2345 * @data: ioctl data 2346 * @file_priv: DRM file info 2347 * 2348 * Construct a plane configuration structure to return to the user. 2349 * 2350 * Called by the user via ioctl. 2351 * 2352 * Returns: 2353 * Zero on success, negative errno on failure. 2354 */ 2355 int drm_mode_getplane(struct drm_device *dev, void *data, 2356 struct drm_file *file_priv) 2357 { 2358 struct drm_mode_get_plane *plane_resp = data; 2359 struct drm_plane *plane; 2360 uint32_t __user *format_ptr; 2361 2362 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2363 return -EINVAL; 2364 2365 plane = drm_plane_find(dev, plane_resp->plane_id); 2366 if (!plane) 2367 return -ENOENT; 2368 2369 drm_modeset_lock(&plane->mutex, NULL); 2370 if (plane->crtc) 2371 plane_resp->crtc_id = plane->crtc->base.id; 2372 else 2373 plane_resp->crtc_id = 0; 2374 2375 if (plane->fb) 2376 plane_resp->fb_id = plane->fb->base.id; 2377 else 2378 plane_resp->fb_id = 0; 2379 drm_modeset_unlock(&plane->mutex); 2380 2381 plane_resp->plane_id = plane->base.id; 2382 plane_resp->possible_crtcs = plane->possible_crtcs; 2383 plane_resp->gamma_size = 0; 2384 2385 /* 2386 * This ioctl is called twice, once to determine how much space is 2387 * needed, and the 2nd time to fill it. 2388 */ 2389 if (plane->format_count && 2390 (plane_resp->count_format_types >= plane->format_count)) { 2391 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2392 if (copy_to_user(format_ptr, 2393 plane->format_types, 2394 sizeof(uint32_t) * plane->format_count)) { 2395 return -EFAULT; 2396 } 2397 } 2398 plane_resp->count_format_types = plane->format_count; 2399 2400 return 0; 2401 } 2402 2403 /* 2404 * setplane_internal - setplane handler for internal callers 2405 * 2406 * Note that we assume an extra reference has already been taken on fb. If the 2407 * update fails, this reference will be dropped before return; if it succeeds, 2408 * the previous framebuffer (if any) will be unreferenced instead. 2409 * 2410 * src_{x,y,w,h} are provided in 16.16 fixed point format 2411 */ 2412 static int __setplane_internal(struct drm_plane *plane, 2413 struct drm_crtc *crtc, 2414 struct drm_framebuffer *fb, 2415 int32_t crtc_x, int32_t crtc_y, 2416 uint32_t crtc_w, uint32_t crtc_h, 2417 /* src_{x,y,w,h} values are 16.16 fixed point */ 2418 uint32_t src_x, uint32_t src_y, 2419 uint32_t src_w, uint32_t src_h) 2420 { 2421 int ret = 0; 2422 unsigned int fb_width, fb_height; 2423 unsigned int i; 2424 2425 /* No fb means shut it down */ 2426 if (!fb) { 2427 plane->old_fb = plane->fb; 2428 ret = plane->funcs->disable_plane(plane); 2429 if (!ret) { 2430 plane->crtc = NULL; 2431 plane->fb = NULL; 2432 } else { 2433 plane->old_fb = NULL; 2434 } 2435 goto out; 2436 } 2437 2438 /* Check whether this plane is usable on this CRTC */ 2439 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2440 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2441 ret = -EINVAL; 2442 goto out; 2443 } 2444 2445 /* Check whether this plane supports the fb pixel format. */ 2446 for (i = 0; i < plane->format_count; i++) 2447 if (fb->pixel_format == plane->format_types[i]) 2448 break; 2449 if (i == plane->format_count) { 2450 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2451 drm_get_format_name(fb->pixel_format)); 2452 ret = -EINVAL; 2453 goto out; 2454 } 2455 2456 fb_width = fb->width << 16; 2457 fb_height = fb->height << 16; 2458 2459 /* Make sure source coordinates are inside the fb. */ 2460 if (src_w > fb_width || 2461 src_x > fb_width - src_w || 2462 src_h > fb_height || 2463 src_y > fb_height - src_h) { 2464 DRM_DEBUG_KMS("Invalid source coordinates " 2465 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2466 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2467 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2468 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2469 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2470 ret = -ENOSPC; 2471 goto out; 2472 } 2473 2474 plane->old_fb = plane->fb; 2475 ret = plane->funcs->update_plane(plane, crtc, fb, 2476 crtc_x, crtc_y, crtc_w, crtc_h, 2477 src_x, src_y, src_w, src_h); 2478 if (!ret) { 2479 plane->crtc = crtc; 2480 plane->fb = fb; 2481 fb = NULL; 2482 } else { 2483 plane->old_fb = NULL; 2484 } 2485 2486 out: 2487 if (fb) 2488 drm_framebuffer_unreference(fb); 2489 if (plane->old_fb) 2490 drm_framebuffer_unreference(plane->old_fb); 2491 plane->old_fb = NULL; 2492 2493 return ret; 2494 } 2495 2496 static int setplane_internal(struct drm_plane *plane, 2497 struct drm_crtc *crtc, 2498 struct drm_framebuffer *fb, 2499 int32_t crtc_x, int32_t crtc_y, 2500 uint32_t crtc_w, uint32_t crtc_h, 2501 /* src_{x,y,w,h} values are 16.16 fixed point */ 2502 uint32_t src_x, uint32_t src_y, 2503 uint32_t src_w, uint32_t src_h) 2504 { 2505 int ret; 2506 2507 drm_modeset_lock_all(plane->dev); 2508 ret = __setplane_internal(plane, crtc, fb, 2509 crtc_x, crtc_y, crtc_w, crtc_h, 2510 src_x, src_y, src_w, src_h); 2511 drm_modeset_unlock_all(plane->dev); 2512 2513 return ret; 2514 } 2515 2516 /** 2517 * drm_mode_setplane - configure a plane's configuration 2518 * @dev: DRM device 2519 * @data: ioctl data* 2520 * @file_priv: DRM file info 2521 * 2522 * Set plane configuration, including placement, fb, scaling, and other factors. 2523 * Or pass a NULL fb to disable (planes may be disabled without providing a 2524 * valid crtc). 2525 * 2526 * Returns: 2527 * Zero on success, negative errno on failure. 2528 */ 2529 int drm_mode_setplane(struct drm_device *dev, void *data, 2530 struct drm_file *file_priv) 2531 { 2532 struct drm_mode_set_plane *plane_req = data; 2533 struct drm_plane *plane; 2534 struct drm_crtc *crtc = NULL; 2535 struct drm_framebuffer *fb = NULL; 2536 2537 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2538 return -EINVAL; 2539 2540 /* Give drivers some help against integer overflows */ 2541 if (plane_req->crtc_w > INT_MAX || 2542 plane_req->crtc_x > INT_MAX - (int32_t) plane_req->crtc_w || 2543 plane_req->crtc_h > INT_MAX || 2544 plane_req->crtc_y > INT_MAX - (int32_t) plane_req->crtc_h) { 2545 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2546 plane_req->crtc_w, plane_req->crtc_h, 2547 plane_req->crtc_x, plane_req->crtc_y); 2548 return -ERANGE; 2549 } 2550 2551 /* 2552 * First, find the plane, crtc, and fb objects. If not available, 2553 * we don't bother to call the driver. 2554 */ 2555 plane = drm_plane_find(dev, plane_req->plane_id); 2556 if (!plane) { 2557 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2558 plane_req->plane_id); 2559 return -ENOENT; 2560 } 2561 2562 if (plane_req->fb_id) { 2563 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2564 if (!fb) { 2565 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2566 plane_req->fb_id); 2567 return -ENOENT; 2568 } 2569 2570 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2571 if (!crtc) { 2572 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2573 plane_req->crtc_id); 2574 return -ENOENT; 2575 } 2576 } 2577 2578 /* 2579 * setplane_internal will take care of deref'ing either the old or new 2580 * framebuffer depending on success. 2581 */ 2582 return setplane_internal(plane, crtc, fb, 2583 plane_req->crtc_x, plane_req->crtc_y, 2584 plane_req->crtc_w, plane_req->crtc_h, 2585 plane_req->src_x, plane_req->src_y, 2586 plane_req->src_w, plane_req->src_h); 2587 } 2588 2589 /** 2590 * drm_mode_set_config_internal - helper to call ->set_config 2591 * @set: modeset config to set 2592 * 2593 * This is a little helper to wrap internal calls to the ->set_config driver 2594 * interface. The only thing it adds is correct refcounting dance. 2595 * 2596 * Returns: 2597 * Zero on success, negative errno on failure. 2598 */ 2599 int drm_mode_set_config_internal(struct drm_mode_set *set) 2600 { 2601 struct drm_crtc *crtc = set->crtc; 2602 struct drm_framebuffer *fb; 2603 struct drm_crtc *tmp; 2604 int ret; 2605 2606 /* 2607 * NOTE: ->set_config can also disable other crtcs (if we steal all 2608 * connectors from it), hence we need to refcount the fbs across all 2609 * crtcs. Atomic modeset will have saner semantics ... 2610 */ 2611 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) 2612 tmp->primary->old_fb = tmp->primary->fb; 2613 2614 fb = set->fb; 2615 2616 ret = crtc->funcs->set_config(set); 2617 if (ret == 0) { 2618 crtc->primary->crtc = crtc; 2619 crtc->primary->fb = fb; 2620 } 2621 2622 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { 2623 if (tmp->primary->fb) 2624 drm_framebuffer_reference(tmp->primary->fb); 2625 if (tmp->primary->old_fb) 2626 drm_framebuffer_unreference(tmp->primary->old_fb); 2627 tmp->primary->old_fb = NULL; 2628 } 2629 2630 return ret; 2631 } 2632 EXPORT_SYMBOL(drm_mode_set_config_internal); 2633 2634 /** 2635 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode 2636 * @mode: mode to query 2637 * @hdisplay: hdisplay value to fill in 2638 * @vdisplay: vdisplay value to fill in 2639 * 2640 * The vdisplay value will be doubled if the specified mode is a stereo mode of 2641 * the appropriate layout. 2642 */ 2643 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, 2644 int *hdisplay, int *vdisplay) 2645 { 2646 struct drm_display_mode adjusted; 2647 2648 drm_mode_copy(&adjusted, mode); 2649 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 2650 *hdisplay = adjusted.crtc_hdisplay; 2651 *vdisplay = adjusted.crtc_vdisplay; 2652 } 2653 EXPORT_SYMBOL(drm_crtc_get_hv_timing); 2654 2655 /** 2656 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2657 * CRTC viewport 2658 * @crtc: CRTC that framebuffer will be displayed on 2659 * @x: x panning 2660 * @y: y panning 2661 * @mode: mode that framebuffer will be displayed under 2662 * @fb: framebuffer to check size of 2663 */ 2664 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2665 int x, int y, 2666 const struct drm_display_mode *mode, 2667 const struct drm_framebuffer *fb) 2668 2669 { 2670 int hdisplay, vdisplay; 2671 2672 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); 2673 2674 if (crtc->invert_dimensions) 2675 swap(hdisplay, vdisplay); 2676 2677 if (hdisplay > fb->width || 2678 vdisplay > fb->height || 2679 x > fb->width - hdisplay || 2680 y > fb->height - vdisplay) { 2681 DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n", 2682 fb->width, fb->height, hdisplay, vdisplay, x, y, 2683 crtc->invert_dimensions ? " (inverted)" : ""); 2684 return -ENOSPC; 2685 } 2686 2687 return 0; 2688 } 2689 EXPORT_SYMBOL(drm_crtc_check_viewport); 2690 2691 /** 2692 * drm_mode_setcrtc - set CRTC configuration 2693 * @dev: drm device for the ioctl 2694 * @data: data pointer for the ioctl 2695 * @file_priv: drm file for the ioctl call 2696 * 2697 * Build a new CRTC configuration based on user request. 2698 * 2699 * Called by the user via ioctl. 2700 * 2701 * Returns: 2702 * Zero on success, negative errno on failure. 2703 */ 2704 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2705 struct drm_file *file_priv) 2706 { 2707 struct drm_mode_config *config = &dev->mode_config; 2708 struct drm_mode_crtc *crtc_req = data; 2709 struct drm_crtc *crtc; 2710 struct drm_connector **connector_set = NULL, *connector; 2711 struct drm_framebuffer *fb = NULL; 2712 struct drm_display_mode *mode = NULL; 2713 struct drm_mode_set set; 2714 uint32_t __user *set_connectors_ptr; 2715 int ret; 2716 int i; 2717 2718 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2719 return -EINVAL; 2720 2721 /* For some reason crtc x/y offsets are signed internally. */ 2722 if (crtc_req->x > INT_MAX || crtc_req->y > INT_MAX) 2723 return -ERANGE; 2724 2725 drm_modeset_lock_all(dev); 2726 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2727 if (!crtc) { 2728 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2729 ret = -ENOENT; 2730 goto out; 2731 } 2732 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 2733 2734 if (crtc_req->mode_valid) { 2735 /* If we have a mode we need a framebuffer. */ 2736 /* If we pass -1, set the mode with the currently bound fb */ 2737 if (crtc_req->fb_id == -1) { 2738 if (!crtc->primary->fb) { 2739 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2740 ret = -EINVAL; 2741 goto out; 2742 } 2743 fb = crtc->primary->fb; 2744 /* Make refcounting symmetric with the lookup path. */ 2745 drm_framebuffer_reference(fb); 2746 } else { 2747 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2748 if (!fb) { 2749 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2750 crtc_req->fb_id); 2751 ret = -ENOENT; 2752 goto out; 2753 } 2754 } 2755 2756 mode = drm_mode_create(dev); 2757 if (!mode) { 2758 ret = -ENOMEM; 2759 goto out; 2760 } 2761 2762 ret = drm_crtc_convert_umode(mode, &crtc_req->mode); 2763 if (ret) { 2764 DRM_DEBUG_KMS("Invalid mode\n"); 2765 goto out; 2766 } 2767 2768 mode->status = drm_mode_validate_basic(mode); 2769 if (mode->status != MODE_OK) { 2770 ret = -EINVAL; 2771 goto out; 2772 } 2773 2774 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 2775 2776 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2777 mode, fb); 2778 if (ret) 2779 goto out; 2780 2781 } 2782 2783 if (crtc_req->count_connectors == 0 && mode) { 2784 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2785 ret = -EINVAL; 2786 goto out; 2787 } 2788 2789 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2790 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2791 crtc_req->count_connectors); 2792 ret = -EINVAL; 2793 goto out; 2794 } 2795 2796 if (crtc_req->count_connectors > 0) { 2797 u32 out_id; 2798 2799 /* Avoid unbounded kernel memory allocation */ 2800 if (crtc_req->count_connectors > config->num_connector) { 2801 ret = -EINVAL; 2802 goto out; 2803 } 2804 2805 connector_set = kmalloc_array(crtc_req->count_connectors, 2806 sizeof(struct drm_connector *), 2807 GFP_KERNEL); 2808 if (!connector_set) { 2809 ret = -ENOMEM; 2810 goto out; 2811 } 2812 2813 for (i = 0; i < crtc_req->count_connectors; i++) { 2814 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2815 if (get_user(out_id, &set_connectors_ptr[i])) { 2816 ret = -EFAULT; 2817 goto out; 2818 } 2819 2820 connector = drm_connector_find(dev, out_id); 2821 if (!connector) { 2822 DRM_DEBUG_KMS("Connector id %d unknown\n", 2823 out_id); 2824 ret = -ENOENT; 2825 goto out; 2826 } 2827 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2828 connector->base.id, 2829 connector->name); 2830 2831 connector_set[i] = connector; 2832 } 2833 } 2834 2835 set.crtc = crtc; 2836 set.x = crtc_req->x; 2837 set.y = crtc_req->y; 2838 set.mode = mode; 2839 set.connectors = connector_set; 2840 set.num_connectors = crtc_req->count_connectors; 2841 set.fb = fb; 2842 ret = drm_mode_set_config_internal(&set); 2843 2844 out: 2845 if (fb) 2846 drm_framebuffer_unreference(fb); 2847 2848 kfree(connector_set); 2849 drm_mode_destroy(dev, mode); 2850 drm_modeset_unlock_all(dev); 2851 return ret; 2852 } 2853 2854 /** 2855 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2856 * universal plane handler call 2857 * @crtc: crtc to update cursor for 2858 * @req: data pointer for the ioctl 2859 * @file_priv: drm file for the ioctl call 2860 * 2861 * Legacy cursor ioctl's work directly with driver buffer handles. To 2862 * translate legacy ioctl calls into universal plane handler calls, we need to 2863 * wrap the native buffer handle in a drm_framebuffer. 2864 * 2865 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2866 * buffer with a pitch of 4*width; the universal plane interface should be used 2867 * directly in cases where the hardware can support other buffer settings and 2868 * userspace wants to make use of these capabilities. 2869 * 2870 * Returns: 2871 * Zero on success, negative errno on failure. 2872 */ 2873 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2874 struct drm_mode_cursor2 *req, 2875 struct drm_file *file_priv) 2876 { 2877 struct drm_device *dev = crtc->dev; 2878 struct drm_framebuffer *fb = NULL; 2879 struct drm_mode_fb_cmd2 fbreq = { 2880 .width = req->width, 2881 .height = req->height, 2882 .pixel_format = DRM_FORMAT_ARGB8888, 2883 .pitches = { req->width * 4 }, 2884 .handles = { req->handle }, 2885 }; 2886 int32_t crtc_x, crtc_y; 2887 uint32_t crtc_w = 0, crtc_h = 0; 2888 uint32_t src_w = 0, src_h = 0; 2889 int ret = 0; 2890 2891 BUG_ON(!crtc->cursor); 2892 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2893 2894 /* 2895 * Obtain fb we'll be using (either new or existing) and take an extra 2896 * reference to it if fb != null. setplane will take care of dropping 2897 * the reference if the plane update fails. 2898 */ 2899 if (req->flags & DRM_MODE_CURSOR_BO) { 2900 if (req->handle) { 2901 fb = internal_framebuffer_create(dev, &fbreq, file_priv); 2902 if (IS_ERR(fb)) { 2903 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2904 return PTR_ERR(fb); 2905 } 2906 } else { 2907 fb = NULL; 2908 } 2909 } else { 2910 fb = crtc->cursor->fb; 2911 if (fb) 2912 drm_framebuffer_reference(fb); 2913 } 2914 2915 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2916 crtc_x = req->x; 2917 crtc_y = req->y; 2918 } else { 2919 crtc_x = crtc->cursor_x; 2920 crtc_y = crtc->cursor_y; 2921 } 2922 2923 if (fb) { 2924 crtc_w = fb->width; 2925 crtc_h = fb->height; 2926 src_w = fb->width << 16; 2927 src_h = fb->height << 16; 2928 } 2929 2930 /* 2931 * setplane_internal will take care of deref'ing either the old or new 2932 * framebuffer depending on success. 2933 */ 2934 ret = __setplane_internal(crtc->cursor, crtc, fb, 2935 crtc_x, crtc_y, crtc_w, crtc_h, 2936 0, 0, src_w, src_h); 2937 2938 /* Update successful; save new cursor position, if necessary */ 2939 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2940 crtc->cursor_x = req->x; 2941 crtc->cursor_y = req->y; 2942 } 2943 2944 return ret; 2945 } 2946 2947 static int drm_mode_cursor_common(struct drm_device *dev, 2948 struct drm_mode_cursor2 *req, 2949 struct drm_file *file_priv) 2950 { 2951 struct drm_crtc *crtc; 2952 int ret = 0; 2953 2954 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2955 return -EINVAL; 2956 2957 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 2958 return -EINVAL; 2959 2960 crtc = drm_crtc_find(dev, req->crtc_id); 2961 if (!crtc) { 2962 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 2963 return -ENOENT; 2964 } 2965 2966 /* 2967 * If this crtc has a universal cursor plane, call that plane's update 2968 * handler rather than using legacy cursor handlers. 2969 */ 2970 drm_modeset_lock_crtc(crtc, crtc->cursor); 2971 if (crtc->cursor) { 2972 ret = drm_mode_cursor_universal(crtc, req, file_priv); 2973 goto out; 2974 } 2975 2976 if (req->flags & DRM_MODE_CURSOR_BO) { 2977 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 2978 ret = -ENXIO; 2979 goto out; 2980 } 2981 /* Turns off the cursor if handle is 0 */ 2982 if (crtc->funcs->cursor_set2) 2983 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 2984 req->width, req->height, req->hot_x, req->hot_y); 2985 else 2986 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 2987 req->width, req->height); 2988 } 2989 2990 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2991 if (crtc->funcs->cursor_move) { 2992 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 2993 } else { 2994 ret = -EFAULT; 2995 goto out; 2996 } 2997 } 2998 out: 2999 drm_modeset_unlock_crtc(crtc); 3000 3001 return ret; 3002 3003 } 3004 3005 3006 /** 3007 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 3008 * @dev: drm device for the ioctl 3009 * @data: data pointer for the ioctl 3010 * @file_priv: drm file for the ioctl call 3011 * 3012 * Set the cursor configuration based on user request. 3013 * 3014 * Called by the user via ioctl. 3015 * 3016 * Returns: 3017 * Zero on success, negative errno on failure. 3018 */ 3019 int drm_mode_cursor_ioctl(struct drm_device *dev, 3020 void *data, struct drm_file *file_priv) 3021 { 3022 struct drm_mode_cursor *req = data; 3023 struct drm_mode_cursor2 new_req; 3024 3025 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 3026 new_req.hot_x = new_req.hot_y = 0; 3027 3028 return drm_mode_cursor_common(dev, &new_req, file_priv); 3029 } 3030 3031 /** 3032 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 3033 * @dev: drm device for the ioctl 3034 * @data: data pointer for the ioctl 3035 * @file_priv: drm file for the ioctl call 3036 * 3037 * Set the cursor configuration based on user request. This implements the 2nd 3038 * version of the cursor ioctl, which allows userspace to additionally specify 3039 * the hotspot of the pointer. 3040 * 3041 * Called by the user via ioctl. 3042 * 3043 * Returns: 3044 * Zero on success, negative errno on failure. 3045 */ 3046 int drm_mode_cursor2_ioctl(struct drm_device *dev, 3047 void *data, struct drm_file *file_priv) 3048 { 3049 struct drm_mode_cursor2 *req = data; 3050 3051 return drm_mode_cursor_common(dev, req, file_priv); 3052 } 3053 3054 /** 3055 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 3056 * @bpp: bits per pixels 3057 * @depth: bit depth per pixel 3058 * 3059 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 3060 * Useful in fbdev emulation code, since that deals in those values. 3061 */ 3062 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 3063 { 3064 uint32_t fmt; 3065 3066 switch (bpp) { 3067 case 8: 3068 fmt = DRM_FORMAT_C8; 3069 break; 3070 case 16: 3071 if (depth == 15) 3072 fmt = DRM_FORMAT_XRGB1555; 3073 else 3074 fmt = DRM_FORMAT_RGB565; 3075 break; 3076 case 24: 3077 fmt = DRM_FORMAT_RGB888; 3078 break; 3079 case 32: 3080 if (depth == 24) 3081 fmt = DRM_FORMAT_XRGB8888; 3082 else if (depth == 30) 3083 fmt = DRM_FORMAT_XRGB2101010; 3084 else 3085 fmt = DRM_FORMAT_ARGB8888; 3086 break; 3087 default: 3088 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3089 fmt = DRM_FORMAT_XRGB8888; 3090 break; 3091 } 3092 3093 return fmt; 3094 } 3095 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3096 3097 /** 3098 * drm_mode_addfb - add an FB to the graphics configuration 3099 * @dev: drm device for the ioctl 3100 * @data: data pointer for the ioctl 3101 * @file_priv: drm file for the ioctl call 3102 * 3103 * Add a new FB to the specified CRTC, given a user request. This is the 3104 * original addfb ioctl which only supported RGB formats. 3105 * 3106 * Called by the user via ioctl. 3107 * 3108 * Returns: 3109 * Zero on success, negative errno on failure. 3110 */ 3111 int drm_mode_addfb(struct drm_device *dev, 3112 void *data, struct drm_file *file_priv) 3113 { 3114 struct drm_mode_fb_cmd *or = data; 3115 struct drm_mode_fb_cmd2 r = {}; 3116 int ret; 3117 3118 /* convert to new format and call new ioctl */ 3119 r.fb_id = or->fb_id; 3120 r.width = or->width; 3121 r.height = or->height; 3122 r.pitches[0] = or->pitch; 3123 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3124 r.handles[0] = or->handle; 3125 3126 ret = drm_mode_addfb2(dev, &r, file_priv); 3127 if (ret) 3128 return ret; 3129 3130 or->fb_id = r.fb_id; 3131 3132 return 0; 3133 } 3134 3135 static int format_check(const struct drm_mode_fb_cmd2 *r) 3136 { 3137 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3138 3139 switch (format) { 3140 case DRM_FORMAT_C8: 3141 case DRM_FORMAT_RGB332: 3142 case DRM_FORMAT_BGR233: 3143 case DRM_FORMAT_XRGB4444: 3144 case DRM_FORMAT_XBGR4444: 3145 case DRM_FORMAT_RGBX4444: 3146 case DRM_FORMAT_BGRX4444: 3147 case DRM_FORMAT_ARGB4444: 3148 case DRM_FORMAT_ABGR4444: 3149 case DRM_FORMAT_RGBA4444: 3150 case DRM_FORMAT_BGRA4444: 3151 case DRM_FORMAT_XRGB1555: 3152 case DRM_FORMAT_XBGR1555: 3153 case DRM_FORMAT_RGBX5551: 3154 case DRM_FORMAT_BGRX5551: 3155 case DRM_FORMAT_ARGB1555: 3156 case DRM_FORMAT_ABGR1555: 3157 case DRM_FORMAT_RGBA5551: 3158 case DRM_FORMAT_BGRA5551: 3159 case DRM_FORMAT_RGB565: 3160 case DRM_FORMAT_BGR565: 3161 case DRM_FORMAT_RGB888: 3162 case DRM_FORMAT_BGR888: 3163 case DRM_FORMAT_XRGB8888: 3164 case DRM_FORMAT_XBGR8888: 3165 case DRM_FORMAT_RGBX8888: 3166 case DRM_FORMAT_BGRX8888: 3167 case DRM_FORMAT_ARGB8888: 3168 case DRM_FORMAT_ABGR8888: 3169 case DRM_FORMAT_RGBA8888: 3170 case DRM_FORMAT_BGRA8888: 3171 case DRM_FORMAT_XRGB2101010: 3172 case DRM_FORMAT_XBGR2101010: 3173 case DRM_FORMAT_RGBX1010102: 3174 case DRM_FORMAT_BGRX1010102: 3175 case DRM_FORMAT_ARGB2101010: 3176 case DRM_FORMAT_ABGR2101010: 3177 case DRM_FORMAT_RGBA1010102: 3178 case DRM_FORMAT_BGRA1010102: 3179 case DRM_FORMAT_YUYV: 3180 case DRM_FORMAT_YVYU: 3181 case DRM_FORMAT_UYVY: 3182 case DRM_FORMAT_VYUY: 3183 case DRM_FORMAT_AYUV: 3184 case DRM_FORMAT_NV12: 3185 case DRM_FORMAT_NV21: 3186 case DRM_FORMAT_NV16: 3187 case DRM_FORMAT_NV61: 3188 case DRM_FORMAT_NV24: 3189 case DRM_FORMAT_NV42: 3190 case DRM_FORMAT_YUV410: 3191 case DRM_FORMAT_YVU410: 3192 case DRM_FORMAT_YUV411: 3193 case DRM_FORMAT_YVU411: 3194 case DRM_FORMAT_YUV420: 3195 case DRM_FORMAT_YVU420: 3196 case DRM_FORMAT_YUV422: 3197 case DRM_FORMAT_YVU422: 3198 case DRM_FORMAT_YUV444: 3199 case DRM_FORMAT_YVU444: 3200 return 0; 3201 default: 3202 DRM_DEBUG_KMS("invalid pixel format %s\n", 3203 drm_get_format_name(r->pixel_format)); 3204 return -EINVAL; 3205 } 3206 } 3207 3208 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3209 { 3210 int ret, hsub, vsub, num_planes, i; 3211 3212 ret = format_check(r); 3213 if (ret) { 3214 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3215 drm_get_format_name(r->pixel_format)); 3216 return ret; 3217 } 3218 3219 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3220 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3221 num_planes = drm_format_num_planes(r->pixel_format); 3222 3223 if (r->width == 0 || r->width % hsub) { 3224 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3225 return -EINVAL; 3226 } 3227 3228 if (r->height == 0 || r->height % vsub) { 3229 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3230 return -EINVAL; 3231 } 3232 3233 for (i = 0; i < num_planes; i++) { 3234 unsigned int width = r->width / (i != 0 ? hsub : 1); 3235 unsigned int height = r->height / (i != 0 ? vsub : 1); 3236 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3237 3238 if (!r->handles[i]) { 3239 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3240 return -EINVAL; 3241 } 3242 3243 if ((uint64_t) width * cpp > UINT_MAX) 3244 return -ERANGE; 3245 3246 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3247 return -ERANGE; 3248 3249 if (r->pitches[i] < width * cpp) { 3250 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3251 return -EINVAL; 3252 } 3253 } 3254 3255 return 0; 3256 } 3257 3258 static struct drm_framebuffer * 3259 internal_framebuffer_create(struct drm_device *dev, 3260 struct drm_mode_fb_cmd2 *r, 3261 struct drm_file *file_priv) 3262 { 3263 struct drm_mode_config *config = &dev->mode_config; 3264 struct drm_framebuffer *fb; 3265 int ret; 3266 3267 if (r->flags & ~DRM_MODE_FB_INTERLACED) { 3268 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3269 return ERR_PTR(-EINVAL); 3270 } 3271 3272 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3273 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3274 r->width, config->min_width, config->max_width); 3275 return ERR_PTR(-EINVAL); 3276 } 3277 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3278 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3279 r->height, config->min_height, config->max_height); 3280 return ERR_PTR(-EINVAL); 3281 } 3282 3283 ret = framebuffer_check(r); 3284 if (ret) 3285 return ERR_PTR(ret); 3286 3287 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3288 if (IS_ERR(fb)) { 3289 DRM_DEBUG_KMS("could not create framebuffer\n"); 3290 return fb; 3291 } 3292 3293 return fb; 3294 } 3295 3296 /** 3297 * drm_mode_addfb2 - add an FB to the graphics configuration 3298 * @dev: drm device for the ioctl 3299 * @data: data pointer for the ioctl 3300 * @file_priv: drm file for the ioctl call 3301 * 3302 * Add a new FB to the specified CRTC, given a user request with format. This is 3303 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3304 * and uses fourcc codes as pixel format specifiers. 3305 * 3306 * Called by the user via ioctl. 3307 * 3308 * Returns: 3309 * Zero on success, negative errno on failure. 3310 */ 3311 int drm_mode_addfb2(struct drm_device *dev, 3312 void *data, struct drm_file *file_priv) 3313 { 3314 struct drm_mode_fb_cmd2 *r = data; 3315 struct drm_framebuffer *fb; 3316 3317 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3318 return -EINVAL; 3319 3320 fb = internal_framebuffer_create(dev, r, file_priv); 3321 if (IS_ERR(fb)) 3322 return PTR_ERR(fb); 3323 3324 /* Transfer ownership to the filp for reaping on close */ 3325 3326 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3327 mutex_lock(&file_priv->fbs_lock); 3328 r->fb_id = fb->base.id; 3329 list_add(&fb->filp_head, &file_priv->fbs); 3330 mutex_unlock(&file_priv->fbs_lock); 3331 3332 return 0; 3333 } 3334 3335 /** 3336 * drm_mode_rmfb - remove an FB from the configuration 3337 * @dev: drm device for the ioctl 3338 * @data: data pointer for the ioctl 3339 * @file_priv: drm file for the ioctl call 3340 * 3341 * Remove the FB specified by the user. 3342 * 3343 * Called by the user via ioctl. 3344 * 3345 * Returns: 3346 * Zero on success, negative errno on failure. 3347 */ 3348 int drm_mode_rmfb(struct drm_device *dev, 3349 void *data, struct drm_file *file_priv) 3350 { 3351 struct drm_framebuffer *fb = NULL; 3352 struct drm_framebuffer *fbl = NULL; 3353 uint32_t *id = data; 3354 int found = 0; 3355 3356 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3357 return -EINVAL; 3358 3359 mutex_lock(&file_priv->fbs_lock); 3360 mutex_lock(&dev->mode_config.fb_lock); 3361 fb = __drm_framebuffer_lookup(dev, *id); 3362 if (!fb) 3363 goto fail_lookup; 3364 3365 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3366 if (fb == fbl) 3367 found = 1; 3368 if (!found) 3369 goto fail_lookup; 3370 3371 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ 3372 __drm_framebuffer_unregister(dev, fb); 3373 3374 list_del_init(&fb->filp_head); 3375 mutex_unlock(&dev->mode_config.fb_lock); 3376 mutex_unlock(&file_priv->fbs_lock); 3377 3378 drm_framebuffer_remove(fb); 3379 3380 return 0; 3381 3382 fail_lookup: 3383 mutex_unlock(&dev->mode_config.fb_lock); 3384 mutex_unlock(&file_priv->fbs_lock); 3385 3386 return -ENOENT; 3387 } 3388 3389 /** 3390 * drm_mode_getfb - get FB info 3391 * @dev: drm device for the ioctl 3392 * @data: data pointer for the ioctl 3393 * @file_priv: drm file for the ioctl call 3394 * 3395 * Lookup the FB given its ID and return info about it. 3396 * 3397 * Called by the user via ioctl. 3398 * 3399 * Returns: 3400 * Zero on success, negative errno on failure. 3401 */ 3402 int drm_mode_getfb(struct drm_device *dev, 3403 void *data, struct drm_file *file_priv) 3404 { 3405 struct drm_mode_fb_cmd *r = data; 3406 struct drm_framebuffer *fb; 3407 int ret; 3408 3409 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3410 return -EINVAL; 3411 3412 fb = drm_framebuffer_lookup(dev, r->fb_id); 3413 if (!fb) 3414 return -ENOENT; 3415 3416 r->height = fb->height; 3417 r->width = fb->width; 3418 r->depth = fb->depth; 3419 r->bpp = fb->bits_per_pixel; 3420 r->pitch = fb->pitches[0]; 3421 if (fb->funcs->create_handle) { 3422 if (file_priv->is_master || capable(CAP_SYS_ADMIN) || 3423 drm_is_control_client(file_priv)) { 3424 ret = fb->funcs->create_handle(fb, file_priv, 3425 &r->handle); 3426 } else { 3427 /* GET_FB() is an unprivileged ioctl so we must not 3428 * return a buffer-handle to non-master processes! For 3429 * backwards-compatibility reasons, we cannot make 3430 * GET_FB() privileged, so just return an invalid handle 3431 * for non-masters. */ 3432 r->handle = 0; 3433 ret = 0; 3434 } 3435 } else { 3436 ret = -ENODEV; 3437 } 3438 3439 drm_framebuffer_unreference(fb); 3440 3441 return ret; 3442 } 3443 3444 /** 3445 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3446 * @dev: drm device for the ioctl 3447 * @data: data pointer for the ioctl 3448 * @file_priv: drm file for the ioctl call 3449 * 3450 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3451 * rectangle list. Generic userspace which does frontbuffer rendering must call 3452 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3453 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3454 * 3455 * Modesetting drivers which always update the frontbuffer do not need to 3456 * implement the corresponding ->dirty framebuffer callback. 3457 * 3458 * Called by the user via ioctl. 3459 * 3460 * Returns: 3461 * Zero on success, negative errno on failure. 3462 */ 3463 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3464 void *data, struct drm_file *file_priv) 3465 { 3466 struct drm_clip_rect __user *clips_ptr; 3467 struct drm_clip_rect *clips = NULL; 3468 struct drm_mode_fb_dirty_cmd *r = data; 3469 struct drm_framebuffer *fb; 3470 unsigned flags; 3471 int num_clips; 3472 int ret; 3473 3474 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3475 return -EINVAL; 3476 3477 fb = drm_framebuffer_lookup(dev, r->fb_id); 3478 if (!fb) 3479 return -ENOENT; 3480 3481 num_clips = r->num_clips; 3482 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3483 3484 if (!num_clips != !clips_ptr) { 3485 ret = -EINVAL; 3486 goto out_err1; 3487 } 3488 3489 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3490 3491 /* If userspace annotates copy, clips must come in pairs */ 3492 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3493 ret = -EINVAL; 3494 goto out_err1; 3495 } 3496 3497 if (num_clips && clips_ptr) { 3498 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3499 ret = -EINVAL; 3500 goto out_err1; 3501 } 3502 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); 3503 if (!clips) { 3504 ret = -ENOMEM; 3505 goto out_err1; 3506 } 3507 3508 ret = copy_from_user(clips, clips_ptr, 3509 num_clips * sizeof(*clips)); 3510 if (ret) { 3511 ret = -EFAULT; 3512 goto out_err2; 3513 } 3514 } 3515 3516 if (fb->funcs->dirty) { 3517 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3518 clips, num_clips); 3519 } else { 3520 ret = -ENOSYS; 3521 } 3522 3523 out_err2: 3524 kfree(clips); 3525 out_err1: 3526 drm_framebuffer_unreference(fb); 3527 3528 return ret; 3529 } 3530 3531 3532 /** 3533 * drm_fb_release - remove and free the FBs on this file 3534 * @priv: drm file for the ioctl 3535 * 3536 * Destroy all the FBs associated with @filp. 3537 * 3538 * Called by the user via ioctl. 3539 * 3540 * Returns: 3541 * Zero on success, negative errno on failure. 3542 */ 3543 void drm_fb_release(struct drm_file *priv) 3544 { 3545 struct drm_device *dev = priv->minor->dev; 3546 struct drm_framebuffer *fb, *tfb; 3547 3548 /* 3549 * When the file gets released that means no one else can access the fb 3550 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3551 * avoid upsetting lockdep since the universal cursor code adds a 3552 * framebuffer while holding mutex locks. 3553 * 3554 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3555 * locks is impossible here since no one else but this function can get 3556 * at it any more. 3557 */ 3558 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3559 3560 mutex_lock(&dev->mode_config.fb_lock); 3561 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ 3562 __drm_framebuffer_unregister(dev, fb); 3563 mutex_unlock(&dev->mode_config.fb_lock); 3564 3565 list_del_init(&fb->filp_head); 3566 3567 /* This will also drop the fpriv->fbs reference. */ 3568 drm_framebuffer_remove(fb); 3569 } 3570 } 3571 3572 /** 3573 * drm_property_create - create a new property type 3574 * @dev: drm device 3575 * @flags: flags specifying the property type 3576 * @name: name of the property 3577 * @num_values: number of pre-defined values 3578 * 3579 * This creates a new generic drm property which can then be attached to a drm 3580 * object with drm_object_attach_property. The returned property object must be 3581 * freed with drm_property_destroy. 3582 * 3583 * Note that the DRM core keeps a per-device list of properties and that, if 3584 * drm_mode_config_cleanup() is called, it will destroy all properties created 3585 * by the driver. 3586 * 3587 * Returns: 3588 * A pointer to the newly created property on success, NULL on failure. 3589 */ 3590 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3591 const char *name, int num_values) 3592 { 3593 struct drm_property *property = NULL; 3594 int ret; 3595 3596 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3597 if (!property) 3598 return NULL; 3599 3600 property->dev = dev; 3601 3602 if (num_values) { 3603 property->values = kcalloc(num_values, sizeof(uint64_t), 3604 GFP_KERNEL); 3605 if (!property->values) 3606 goto fail; 3607 } 3608 3609 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3610 if (ret) 3611 goto fail; 3612 3613 property->flags = flags; 3614 property->num_values = num_values; 3615 INIT_LIST_HEAD(&property->enum_list); 3616 3617 if (name) { 3618 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3619 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3620 } 3621 3622 list_add_tail(&property->head, &dev->mode_config.property_list); 3623 3624 WARN_ON(!drm_property_type_valid(property)); 3625 3626 return property; 3627 fail: 3628 kfree(property->values); 3629 kfree(property); 3630 return NULL; 3631 } 3632 EXPORT_SYMBOL(drm_property_create); 3633 3634 /** 3635 * drm_property_create_enum - create a new enumeration property type 3636 * @dev: drm device 3637 * @flags: flags specifying the property type 3638 * @name: name of the property 3639 * @props: enumeration lists with property values 3640 * @num_values: number of pre-defined values 3641 * 3642 * This creates a new generic drm property which can then be attached to a drm 3643 * object with drm_object_attach_property. The returned property object must be 3644 * freed with drm_property_destroy. 3645 * 3646 * Userspace is only allowed to set one of the predefined values for enumeration 3647 * properties. 3648 * 3649 * Returns: 3650 * A pointer to the newly created property on success, NULL on failure. 3651 */ 3652 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3653 const char *name, 3654 const struct drm_prop_enum_list *props, 3655 int num_values) 3656 { 3657 struct drm_property *property; 3658 int i, ret; 3659 3660 flags |= DRM_MODE_PROP_ENUM; 3661 3662 property = drm_property_create(dev, flags, name, num_values); 3663 if (!property) 3664 return NULL; 3665 3666 for (i = 0; i < num_values; i++) { 3667 ret = drm_property_add_enum(property, i, 3668 props[i].type, 3669 props[i].name); 3670 if (ret) { 3671 drm_property_destroy(dev, property); 3672 return NULL; 3673 } 3674 } 3675 3676 return property; 3677 } 3678 EXPORT_SYMBOL(drm_property_create_enum); 3679 3680 /** 3681 * drm_property_create_bitmask - create a new bitmask property type 3682 * @dev: drm device 3683 * @flags: flags specifying the property type 3684 * @name: name of the property 3685 * @props: enumeration lists with property bitflags 3686 * @num_props: size of the @props array 3687 * @supported_bits: bitmask of all supported enumeration values 3688 * 3689 * This creates a new bitmask drm property which can then be attached to a drm 3690 * object with drm_object_attach_property. The returned property object must be 3691 * freed with drm_property_destroy. 3692 * 3693 * Compared to plain enumeration properties userspace is allowed to set any 3694 * or'ed together combination of the predefined property bitflag values 3695 * 3696 * Returns: 3697 * A pointer to the newly created property on success, NULL on failure. 3698 */ 3699 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3700 int flags, const char *name, 3701 const struct drm_prop_enum_list *props, 3702 int num_props, 3703 uint64_t supported_bits) 3704 { 3705 struct drm_property *property; 3706 int i, ret, index = 0; 3707 int num_values = hweight64(supported_bits); 3708 3709 flags |= DRM_MODE_PROP_BITMASK; 3710 3711 property = drm_property_create(dev, flags, name, num_values); 3712 if (!property) 3713 return NULL; 3714 for (i = 0; i < num_props; i++) { 3715 if (!(supported_bits & (1ULL << props[i].type))) 3716 continue; 3717 3718 if (WARN_ON(index >= num_values)) { 3719 drm_property_destroy(dev, property); 3720 return NULL; 3721 } 3722 3723 ret = drm_property_add_enum(property, index++, 3724 props[i].type, 3725 props[i].name); 3726 if (ret) { 3727 drm_property_destroy(dev, property); 3728 return NULL; 3729 } 3730 } 3731 3732 return property; 3733 } 3734 EXPORT_SYMBOL(drm_property_create_bitmask); 3735 3736 static struct drm_property *property_create_range(struct drm_device *dev, 3737 int flags, const char *name, 3738 uint64_t min, uint64_t max) 3739 { 3740 struct drm_property *property; 3741 3742 property = drm_property_create(dev, flags, name, 2); 3743 if (!property) 3744 return NULL; 3745 3746 property->values[0] = min; 3747 property->values[1] = max; 3748 3749 return property; 3750 } 3751 3752 /** 3753 * drm_property_create_range - create a new unsigned ranged property type 3754 * @dev: drm device 3755 * @flags: flags specifying the property type 3756 * @name: name of the property 3757 * @min: minimum value of the property 3758 * @max: maximum value of the property 3759 * 3760 * This creates a new generic drm property which can then be attached to a drm 3761 * object with drm_object_attach_property. The returned property object must be 3762 * freed with drm_property_destroy. 3763 * 3764 * Userspace is allowed to set any unsigned integer value in the (min, max) 3765 * range inclusive. 3766 * 3767 * Returns: 3768 * A pointer to the newly created property on success, NULL on failure. 3769 */ 3770 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3771 const char *name, 3772 uint64_t min, uint64_t max) 3773 { 3774 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3775 name, min, max); 3776 } 3777 EXPORT_SYMBOL(drm_property_create_range); 3778 3779 /** 3780 * drm_property_create_signed_range - create a new signed ranged property type 3781 * @dev: drm device 3782 * @flags: flags specifying the property type 3783 * @name: name of the property 3784 * @min: minimum value of the property 3785 * @max: maximum value of the property 3786 * 3787 * This creates a new generic drm property which can then be attached to a drm 3788 * object with drm_object_attach_property. The returned property object must be 3789 * freed with drm_property_destroy. 3790 * 3791 * Userspace is allowed to set any signed integer value in the (min, max) 3792 * range inclusive. 3793 * 3794 * Returns: 3795 * A pointer to the newly created property on success, NULL on failure. 3796 */ 3797 struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3798 int flags, const char *name, 3799 int64_t min, int64_t max) 3800 { 3801 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3802 name, I642U64(min), I642U64(max)); 3803 } 3804 EXPORT_SYMBOL(drm_property_create_signed_range); 3805 3806 /** 3807 * drm_property_create_object - create a new object property type 3808 * @dev: drm device 3809 * @flags: flags specifying the property type 3810 * @name: name of the property 3811 * @type: object type from DRM_MODE_OBJECT_* defines 3812 * 3813 * This creates a new generic drm property which can then be attached to a drm 3814 * object with drm_object_attach_property. The returned property object must be 3815 * freed with drm_property_destroy. 3816 * 3817 * Userspace is only allowed to set this to any property value of the given 3818 * @type. Only useful for atomic properties, which is enforced. 3819 * 3820 * Returns: 3821 * A pointer to the newly created property on success, NULL on failure. 3822 */ 3823 struct drm_property *drm_property_create_object(struct drm_device *dev, 3824 int flags, const char *name, uint32_t type) 3825 { 3826 struct drm_property *property; 3827 3828 flags |= DRM_MODE_PROP_OBJECT; 3829 3830 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) 3831 return NULL; 3832 3833 property = drm_property_create(dev, flags, name, 1); 3834 if (!property) 3835 return NULL; 3836 3837 property->values[0] = type; 3838 3839 return property; 3840 } 3841 EXPORT_SYMBOL(drm_property_create_object); 3842 3843 /** 3844 * drm_property_create_bool - create a new boolean property type 3845 * @dev: drm device 3846 * @flags: flags specifying the property type 3847 * @name: name of the property 3848 * 3849 * This creates a new generic drm property which can then be attached to a drm 3850 * object with drm_object_attach_property. The returned property object must be 3851 * freed with drm_property_destroy. 3852 * 3853 * This is implemented as a ranged property with only {0, 1} as valid values. 3854 * 3855 * Returns: 3856 * A pointer to the newly created property on success, NULL on failure. 3857 */ 3858 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, 3859 const char *name) 3860 { 3861 return drm_property_create_range(dev, flags, name, 0, 1); 3862 } 3863 EXPORT_SYMBOL(drm_property_create_bool); 3864 3865 /** 3866 * drm_property_add_enum - add a possible value to an enumeration property 3867 * @property: enumeration property to change 3868 * @index: index of the new enumeration 3869 * @value: value of the new enumeration 3870 * @name: symbolic name of the new enumeration 3871 * 3872 * This functions adds enumerations to a property. 3873 * 3874 * It's use is deprecated, drivers should use one of the more specific helpers 3875 * to directly create the property with all enumerations already attached. 3876 * 3877 * Returns: 3878 * Zero on success, error code on failure. 3879 */ 3880 int drm_property_add_enum(struct drm_property *property, int index, 3881 uint64_t value, const char *name) 3882 { 3883 struct drm_property_enum *prop_enum; 3884 3885 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3886 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3887 return -EINVAL; 3888 3889 /* 3890 * Bitmask enum properties have the additional constraint of values 3891 * from 0 to 63 3892 */ 3893 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3894 (value > 63)) 3895 return -EINVAL; 3896 3897 if (!list_empty(&property->enum_list)) { 3898 list_for_each_entry(prop_enum, &property->enum_list, head) { 3899 if (prop_enum->value == value) { 3900 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3901 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3902 return 0; 3903 } 3904 } 3905 } 3906 3907 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3908 if (!prop_enum) 3909 return -ENOMEM; 3910 3911 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3912 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3913 prop_enum->value = value; 3914 3915 property->values[index] = value; 3916 list_add_tail(&prop_enum->head, &property->enum_list); 3917 return 0; 3918 } 3919 EXPORT_SYMBOL(drm_property_add_enum); 3920 3921 /** 3922 * drm_property_destroy - destroy a drm property 3923 * @dev: drm device 3924 * @property: property to destry 3925 * 3926 * This function frees a property including any attached resources like 3927 * enumeration values. 3928 */ 3929 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 3930 { 3931 struct drm_property_enum *prop_enum, *pt; 3932 3933 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 3934 list_del(&prop_enum->head); 3935 kfree(prop_enum); 3936 } 3937 3938 if (property->num_values) 3939 kfree(property->values); 3940 drm_mode_object_put(dev, &property->base); 3941 list_del(&property->head); 3942 kfree(property); 3943 } 3944 EXPORT_SYMBOL(drm_property_destroy); 3945 3946 /** 3947 * drm_object_attach_property - attach a property to a modeset object 3948 * @obj: drm modeset object 3949 * @property: property to attach 3950 * @init_val: initial value of the property 3951 * 3952 * This attaches the given property to the modeset object with the given initial 3953 * value. Currently this function cannot fail since the properties are stored in 3954 * a statically sized array. 3955 */ 3956 void drm_object_attach_property(struct drm_mode_object *obj, 3957 struct drm_property *property, 3958 uint64_t init_val) 3959 { 3960 int count = obj->properties->count; 3961 3962 if (count == DRM_OBJECT_MAX_PROPERTY) { 3963 WARN(1, "Failed to attach object property (type: 0x%x). Please " 3964 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 3965 "you see this message on the same object type.\n", 3966 obj->type); 3967 return; 3968 } 3969 3970 obj->properties->properties[count] = property; 3971 obj->properties->values[count] = init_val; 3972 obj->properties->count++; 3973 if (property->flags & DRM_MODE_PROP_ATOMIC) 3974 obj->properties->atomic_count++; 3975 } 3976 EXPORT_SYMBOL(drm_object_attach_property); 3977 3978 /** 3979 * drm_object_property_set_value - set the value of a property 3980 * @obj: drm mode object to set property value for 3981 * @property: property to set 3982 * @val: value the property should be set to 3983 * 3984 * This functions sets a given property on a given object. This function only 3985 * changes the software state of the property, it does not call into the 3986 * driver's ->set_property callback. 3987 * 3988 * Returns: 3989 * Zero on success, error code on failure. 3990 */ 3991 int drm_object_property_set_value(struct drm_mode_object *obj, 3992 struct drm_property *property, uint64_t val) 3993 { 3994 int i; 3995 3996 for (i = 0; i < obj->properties->count; i++) { 3997 if (obj->properties->properties[i] == property) { 3998 obj->properties->values[i] = val; 3999 return 0; 4000 } 4001 } 4002 4003 return -EINVAL; 4004 } 4005 EXPORT_SYMBOL(drm_object_property_set_value); 4006 4007 /** 4008 * drm_object_property_get_value - retrieve the value of a property 4009 * @obj: drm mode object to get property value from 4010 * @property: property to retrieve 4011 * @val: storage for the property value 4012 * 4013 * This function retrieves the softare state of the given property for the given 4014 * property. Since there is no driver callback to retrieve the current property 4015 * value this might be out of sync with the hardware, depending upon the driver 4016 * and property. 4017 * 4018 * Returns: 4019 * Zero on success, error code on failure. 4020 */ 4021 int drm_object_property_get_value(struct drm_mode_object *obj, 4022 struct drm_property *property, uint64_t *val) 4023 { 4024 int i; 4025 4026 /* read-only properties bypass atomic mechanism and still store 4027 * their value in obj->properties->values[].. mostly to avoid 4028 * having to deal w/ EDID and similar props in atomic paths: 4029 */ 4030 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && 4031 !(property->flags & DRM_MODE_PROP_IMMUTABLE)) 4032 return drm_atomic_get_property(obj, property, val); 4033 4034 for (i = 0; i < obj->properties->count; i++) { 4035 if (obj->properties->properties[i] == property) { 4036 *val = obj->properties->values[i]; 4037 return 0; 4038 } 4039 } 4040 4041 return -EINVAL; 4042 } 4043 EXPORT_SYMBOL(drm_object_property_get_value); 4044 4045 /** 4046 * drm_mode_getproperty_ioctl - get the property metadata 4047 * @dev: DRM device 4048 * @data: ioctl data 4049 * @file_priv: DRM file info 4050 * 4051 * This function retrieves the metadata for a given property, like the different 4052 * possible values for an enum property or the limits for a range property. 4053 * 4054 * Blob properties are special 4055 * 4056 * Called by the user via ioctl. 4057 * 4058 * Returns: 4059 * Zero on success, negative errno on failure. 4060 */ 4061 int drm_mode_getproperty_ioctl(struct drm_device *dev, 4062 void *data, struct drm_file *file_priv) 4063 { 4064 struct drm_mode_get_property *out_resp = data; 4065 struct drm_property *property; 4066 int enum_count = 0; 4067 int value_count = 0; 4068 int ret = 0, i; 4069 int copied; 4070 struct drm_property_enum *prop_enum; 4071 struct drm_mode_property_enum __user *enum_ptr; 4072 uint64_t __user *values_ptr; 4073 4074 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4075 return -EINVAL; 4076 4077 drm_modeset_lock_all(dev); 4078 property = drm_property_find(dev, out_resp->prop_id); 4079 if (!property) { 4080 ret = -ENOENT; 4081 goto done; 4082 } 4083 4084 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4085 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4086 list_for_each_entry(prop_enum, &property->enum_list, head) 4087 enum_count++; 4088 } 4089 4090 value_count = property->num_values; 4091 4092 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 4093 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 4094 out_resp->flags = property->flags; 4095 4096 if ((out_resp->count_values >= value_count) && value_count) { 4097 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 4098 for (i = 0; i < value_count; i++) { 4099 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 4100 ret = -EFAULT; 4101 goto done; 4102 } 4103 } 4104 } 4105 out_resp->count_values = value_count; 4106 4107 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4108 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4109 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 4110 copied = 0; 4111 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 4112 list_for_each_entry(prop_enum, &property->enum_list, head) { 4113 4114 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 4115 ret = -EFAULT; 4116 goto done; 4117 } 4118 4119 if (copy_to_user(&enum_ptr[copied].name, 4120 &prop_enum->name, DRM_PROP_NAME_LEN)) { 4121 ret = -EFAULT; 4122 goto done; 4123 } 4124 copied++; 4125 } 4126 } 4127 out_resp->count_enum_blobs = enum_count; 4128 } 4129 4130 /* 4131 * NOTE: The idea seems to have been to use this to read all the blob 4132 * property values. But nothing ever added them to the corresponding 4133 * list, userspace always used the special-purpose get_blob ioctl to 4134 * read the value for a blob property. It also doesn't make a lot of 4135 * sense to return values here when everything else is just metadata for 4136 * the property itself. 4137 */ 4138 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4139 out_resp->count_enum_blobs = 0; 4140 done: 4141 drm_modeset_unlock_all(dev); 4142 return ret; 4143 } 4144 4145 static struct drm_property_blob * 4146 drm_property_create_blob(struct drm_device *dev, size_t length, 4147 const void *data) 4148 { 4149 struct drm_property_blob *blob; 4150 int ret; 4151 4152 if (!length || !data) 4153 return NULL; 4154 4155 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4156 if (!blob) 4157 return NULL; 4158 4159 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 4160 if (ret) { 4161 kfree(blob); 4162 return NULL; 4163 } 4164 4165 blob->length = length; 4166 4167 memcpy(blob->data, data, length); 4168 4169 list_add_tail(&blob->head, &dev->mode_config.property_blob_list); 4170 return blob; 4171 } 4172 4173 static void drm_property_destroy_blob(struct drm_device *dev, 4174 struct drm_property_blob *blob) 4175 { 4176 drm_mode_object_put(dev, &blob->base); 4177 list_del(&blob->head); 4178 kfree(blob); 4179 } 4180 4181 /** 4182 * drm_mode_getblob_ioctl - get the contents of a blob property value 4183 * @dev: DRM device 4184 * @data: ioctl data 4185 * @file_priv: DRM file info 4186 * 4187 * This function retrieves the contents of a blob property. The value stored in 4188 * an object's blob property is just a normal modeset object id. 4189 * 4190 * Called by the user via ioctl. 4191 * 4192 * Returns: 4193 * Zero on success, negative errno on failure. 4194 */ 4195 int drm_mode_getblob_ioctl(struct drm_device *dev, 4196 void *data, struct drm_file *file_priv) 4197 { 4198 struct drm_mode_get_blob *out_resp = data; 4199 struct drm_property_blob *blob; 4200 int ret = 0; 4201 void __user *blob_ptr; 4202 4203 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4204 return -EINVAL; 4205 4206 drm_modeset_lock_all(dev); 4207 blob = drm_property_blob_find(dev, out_resp->blob_id); 4208 if (!blob) { 4209 ret = -ENOENT; 4210 goto done; 4211 } 4212 4213 if (out_resp->length == blob->length) { 4214 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4215 if (copy_to_user(blob_ptr, blob->data, blob->length)) { 4216 ret = -EFAULT; 4217 goto done; 4218 } 4219 } 4220 out_resp->length = blob->length; 4221 4222 done: 4223 drm_modeset_unlock_all(dev); 4224 return ret; 4225 } 4226 4227 /** 4228 * drm_mode_connector_set_path_property - set tile property on connector 4229 * @connector: connector to set property on. 4230 * @path: path to use for property. 4231 * 4232 * This creates a property to expose to userspace to specify a 4233 * connector path. This is mainly used for DisplayPort MST where 4234 * connectors have a topology and we want to allow userspace to give 4235 * them more meaningful names. 4236 * 4237 * Returns: 4238 * Zero on success, negative errno on failure. 4239 */ 4240 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4241 const char *path) 4242 { 4243 struct drm_device *dev = connector->dev; 4244 size_t size = strlen(path) + 1; 4245 int ret; 4246 4247 connector->path_blob_ptr = drm_property_create_blob(connector->dev, 4248 size, path); 4249 if (!connector->path_blob_ptr) 4250 return -EINVAL; 4251 4252 ret = drm_object_property_set_value(&connector->base, 4253 dev->mode_config.path_property, 4254 connector->path_blob_ptr->base.id); 4255 return ret; 4256 } 4257 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4258 4259 /** 4260 * drm_mode_connector_set_tile_property - set tile property on connector 4261 * @connector: connector to set property on. 4262 * 4263 * This looks up the tile information for a connector, and creates a 4264 * property for userspace to parse if it exists. The property is of 4265 * the form of 8 integers using ':' as a separator. 4266 * 4267 * Returns: 4268 * Zero on success, errno on failure. 4269 */ 4270 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4271 { 4272 struct drm_device *dev = connector->dev; 4273 int ret, size; 4274 char tile[256]; 4275 4276 if (connector->tile_blob_ptr) 4277 drm_property_destroy_blob(dev, connector->tile_blob_ptr); 4278 4279 if (!connector->has_tile) { 4280 connector->tile_blob_ptr = NULL; 4281 ret = drm_object_property_set_value(&connector->base, 4282 dev->mode_config.tile_property, 0); 4283 return ret; 4284 } 4285 4286 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4287 connector->tile_group->id, connector->tile_is_single_monitor, 4288 connector->num_h_tile, connector->num_v_tile, 4289 connector->tile_h_loc, connector->tile_v_loc, 4290 connector->tile_h_size, connector->tile_v_size); 4291 size = strlen(tile) + 1; 4292 4293 connector->tile_blob_ptr = drm_property_create_blob(connector->dev, 4294 size, tile); 4295 if (!connector->tile_blob_ptr) 4296 return -EINVAL; 4297 4298 ret = drm_object_property_set_value(&connector->base, 4299 dev->mode_config.tile_property, 4300 connector->tile_blob_ptr->base.id); 4301 return ret; 4302 } 4303 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4304 4305 /** 4306 * drm_mode_connector_update_edid_property - update the edid property of a connector 4307 * @connector: drm connector 4308 * @edid: new value of the edid property 4309 * 4310 * This function creates a new blob modeset object and assigns its id to the 4311 * connector's edid property. 4312 * 4313 * Returns: 4314 * Zero on success, negative errno on failure. 4315 */ 4316 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4317 const struct edid *edid) 4318 { 4319 struct drm_device *dev = connector->dev; 4320 size_t size; 4321 int ret; 4322 4323 /* ignore requests to set edid when overridden */ 4324 if (connector->override_edid) 4325 return 0; 4326 4327 if (connector->edid_blob_ptr) 4328 drm_property_destroy_blob(dev, connector->edid_blob_ptr); 4329 4330 /* Delete edid, when there is none. */ 4331 if (!edid) { 4332 connector->edid_blob_ptr = NULL; 4333 ret = drm_object_property_set_value(&connector->base, dev->mode_config.edid_property, 0); 4334 return ret; 4335 } 4336 4337 size = EDID_LENGTH * (1 + edid->extensions); 4338 connector->edid_blob_ptr = drm_property_create_blob(connector->dev, 4339 size, edid); 4340 if (!connector->edid_blob_ptr) 4341 return -EINVAL; 4342 4343 ret = drm_object_property_set_value(&connector->base, 4344 dev->mode_config.edid_property, 4345 connector->edid_blob_ptr->base.id); 4346 4347 return ret; 4348 } 4349 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4350 4351 /* Some properties could refer to dynamic refcnt'd objects, or things that 4352 * need special locking to handle lifetime issues (ie. to ensure the prop 4353 * value doesn't become invalid part way through the property update due to 4354 * race). The value returned by reference via 'obj' should be passed back 4355 * to drm_property_change_valid_put() after the property is set (and the 4356 * object to which the property is attached has a chance to take it's own 4357 * reference). 4358 */ 4359 bool drm_property_change_valid_get(struct drm_property *property, 4360 uint64_t value, struct drm_mode_object **ref) 4361 { 4362 int i; 4363 4364 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4365 return false; 4366 4367 *ref = NULL; 4368 4369 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4370 if (value < property->values[0] || value > property->values[1]) 4371 return false; 4372 return true; 4373 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4374 int64_t svalue = U642I64(value); 4375 4376 if (svalue < U642I64(property->values[0]) || 4377 svalue > U642I64(property->values[1])) 4378 return false; 4379 return true; 4380 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4381 uint64_t valid_mask = 0; 4382 4383 for (i = 0; i < property->num_values; i++) 4384 valid_mask |= (1ULL << property->values[i]); 4385 return !(value & ~valid_mask); 4386 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4387 /* Only the driver knows */ 4388 return true; 4389 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4390 /* a zero value for an object property translates to null: */ 4391 if (value == 0) 4392 return true; 4393 4394 /* handle refcnt'd objects specially: */ 4395 if (property->values[0] == DRM_MODE_OBJECT_FB) { 4396 struct drm_framebuffer *fb; 4397 fb = drm_framebuffer_lookup(property->dev, value); 4398 if (fb) { 4399 *ref = &fb->base; 4400 return true; 4401 } else { 4402 return false; 4403 } 4404 } else { 4405 return _object_find(property->dev, value, property->values[0]) != NULL; 4406 } 4407 } 4408 4409 for (i = 0; i < property->num_values; i++) 4410 if (property->values[i] == value) 4411 return true; 4412 return false; 4413 } 4414 4415 void drm_property_change_valid_put(struct drm_property *property, 4416 struct drm_mode_object *ref) 4417 { 4418 if (!ref) 4419 return; 4420 4421 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4422 if (property->values[0] == DRM_MODE_OBJECT_FB) 4423 drm_framebuffer_unreference(obj_to_fb(ref)); 4424 } 4425 } 4426 4427 /** 4428 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4429 * @dev: DRM device 4430 * @data: ioctl data 4431 * @file_priv: DRM file info 4432 * 4433 * This function sets the current value for a connectors's property. It also 4434 * calls into a driver's ->set_property callback to update the hardware state 4435 * 4436 * Called by the user via ioctl. 4437 * 4438 * Returns: 4439 * Zero on success, negative errno on failure. 4440 */ 4441 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4442 void *data, struct drm_file *file_priv) 4443 { 4444 struct drm_mode_connector_set_property *conn_set_prop = data; 4445 struct drm_mode_obj_set_property obj_set_prop = { 4446 .value = conn_set_prop->value, 4447 .prop_id = conn_set_prop->prop_id, 4448 .obj_id = conn_set_prop->connector_id, 4449 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4450 }; 4451 4452 /* It does all the locking and checking we need */ 4453 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4454 } 4455 4456 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4457 struct drm_property *property, 4458 uint64_t value) 4459 { 4460 int ret = -EINVAL; 4461 struct drm_connector *connector = obj_to_connector(obj); 4462 4463 /* Do DPMS ourselves */ 4464 if (property == connector->dev->mode_config.dpms_property) { 4465 if (connector->funcs->dpms) 4466 (*connector->funcs->dpms)(connector, (int)value); 4467 ret = 0; 4468 } else if (connector->funcs->set_property) 4469 ret = connector->funcs->set_property(connector, property, value); 4470 4471 /* store the property value if successful */ 4472 if (!ret) 4473 drm_object_property_set_value(&connector->base, property, value); 4474 return ret; 4475 } 4476 4477 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4478 struct drm_property *property, 4479 uint64_t value) 4480 { 4481 int ret = -EINVAL; 4482 struct drm_crtc *crtc = obj_to_crtc(obj); 4483 4484 if (crtc->funcs->set_property) 4485 ret = crtc->funcs->set_property(crtc, property, value); 4486 if (!ret) 4487 drm_object_property_set_value(obj, property, value); 4488 4489 return ret; 4490 } 4491 4492 /** 4493 * drm_mode_plane_set_obj_prop - set the value of a property 4494 * @plane: drm plane object to set property value for 4495 * @property: property to set 4496 * @value: value the property should be set to 4497 * 4498 * This functions sets a given property on a given plane object. This function 4499 * calls the driver's ->set_property callback and changes the software state of 4500 * the property if the callback succeeds. 4501 * 4502 * Returns: 4503 * Zero on success, error code on failure. 4504 */ 4505 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4506 struct drm_property *property, 4507 uint64_t value) 4508 { 4509 int ret = -EINVAL; 4510 struct drm_mode_object *obj = &plane->base; 4511 4512 if (plane->funcs->set_property) 4513 ret = plane->funcs->set_property(plane, property, value); 4514 if (!ret) 4515 drm_object_property_set_value(obj, property, value); 4516 4517 return ret; 4518 } 4519 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4520 4521 /** 4522 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 4523 * @dev: DRM device 4524 * @data: ioctl data 4525 * @file_priv: DRM file info 4526 * 4527 * This function retrieves the current value for an object's property. Compared 4528 * to the connector specific ioctl this one is extended to also work on crtc and 4529 * plane objects. 4530 * 4531 * Called by the user via ioctl. 4532 * 4533 * Returns: 4534 * Zero on success, negative errno on failure. 4535 */ 4536 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4537 struct drm_file *file_priv) 4538 { 4539 struct drm_mode_obj_get_properties *arg = data; 4540 struct drm_mode_object *obj; 4541 int ret = 0; 4542 4543 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4544 return -EINVAL; 4545 4546 drm_modeset_lock_all(dev); 4547 4548 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4549 if (!obj) { 4550 ret = -ENOENT; 4551 goto out; 4552 } 4553 if (!obj->properties) { 4554 ret = -EINVAL; 4555 goto out; 4556 } 4557 4558 ret = get_properties(obj, file_priv->atomic, 4559 (uint32_t __user *)(unsigned long)(arg->props_ptr), 4560 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), 4561 &arg->count_props); 4562 4563 out: 4564 drm_modeset_unlock_all(dev); 4565 return ret; 4566 } 4567 4568 /** 4569 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 4570 * @dev: DRM device 4571 * @data: ioctl data 4572 * @file_priv: DRM file info 4573 * 4574 * This function sets the current value for an object's property. It also calls 4575 * into a driver's ->set_property callback to update the hardware state. 4576 * Compared to the connector specific ioctl this one is extended to also work on 4577 * crtc and plane objects. 4578 * 4579 * Called by the user via ioctl. 4580 * 4581 * Returns: 4582 * Zero on success, negative errno on failure. 4583 */ 4584 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 4585 struct drm_file *file_priv) 4586 { 4587 struct drm_mode_obj_set_property *arg = data; 4588 struct drm_mode_object *arg_obj; 4589 struct drm_mode_object *prop_obj; 4590 struct drm_property *property; 4591 int i, ret = -EINVAL; 4592 struct drm_mode_object *ref; 4593 4594 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4595 return -EINVAL; 4596 4597 drm_modeset_lock_all(dev); 4598 4599 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4600 if (!arg_obj) { 4601 ret = -ENOENT; 4602 goto out; 4603 } 4604 if (!arg_obj->properties) 4605 goto out; 4606 4607 for (i = 0; i < arg_obj->properties->count; i++) 4608 if (arg_obj->properties->properties[i]->base.id == arg->prop_id) 4609 break; 4610 4611 if (i == arg_obj->properties->count) 4612 goto out; 4613 4614 prop_obj = drm_mode_object_find(dev, arg->prop_id, 4615 DRM_MODE_OBJECT_PROPERTY); 4616 if (!prop_obj) { 4617 ret = -ENOENT; 4618 goto out; 4619 } 4620 property = obj_to_property(prop_obj); 4621 4622 if (!drm_property_change_valid_get(property, arg->value, &ref)) 4623 goto out; 4624 4625 switch (arg_obj->type) { 4626 case DRM_MODE_OBJECT_CONNECTOR: 4627 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 4628 arg->value); 4629 break; 4630 case DRM_MODE_OBJECT_CRTC: 4631 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 4632 break; 4633 case DRM_MODE_OBJECT_PLANE: 4634 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 4635 property, arg->value); 4636 break; 4637 } 4638 4639 drm_property_change_valid_put(property, ref); 4640 4641 out: 4642 drm_modeset_unlock_all(dev); 4643 return ret; 4644 } 4645 4646 /** 4647 * drm_mode_connector_attach_encoder - attach a connector to an encoder 4648 * @connector: connector to attach 4649 * @encoder: encoder to attach @connector to 4650 * 4651 * This function links up a connector to an encoder. Note that the routing 4652 * restrictions between encoders and crtcs are exposed to userspace through the 4653 * possible_clones and possible_crtcs bitmasks. 4654 * 4655 * Returns: 4656 * Zero on success, negative errno on failure. 4657 */ 4658 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 4659 struct drm_encoder *encoder) 4660 { 4661 int i; 4662 4663 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 4664 if (connector->encoder_ids[i] == 0) { 4665 connector->encoder_ids[i] = encoder->base.id; 4666 return 0; 4667 } 4668 } 4669 return -ENOMEM; 4670 } 4671 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 4672 4673 /** 4674 * drm_mode_crtc_set_gamma_size - set the gamma table size 4675 * @crtc: CRTC to set the gamma table size for 4676 * @gamma_size: size of the gamma table 4677 * 4678 * Drivers which support gamma tables should set this to the supported gamma 4679 * table size when initializing the CRTC. Currently the drm core only supports a 4680 * fixed gamma table size. 4681 * 4682 * Returns: 4683 * Zero on success, negative errno on failure. 4684 */ 4685 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 4686 int gamma_size) 4687 { 4688 crtc->gamma_size = gamma_size; 4689 4690 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, 4691 GFP_KERNEL); 4692 if (!crtc->gamma_store) { 4693 crtc->gamma_size = 0; 4694 return -ENOMEM; 4695 } 4696 4697 return 0; 4698 } 4699 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 4700 4701 /** 4702 * drm_mode_gamma_set_ioctl - set the gamma table 4703 * @dev: DRM device 4704 * @data: ioctl data 4705 * @file_priv: DRM file info 4706 * 4707 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 4708 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 4709 * 4710 * Called by the user via ioctl. 4711 * 4712 * Returns: 4713 * Zero on success, negative errno on failure. 4714 */ 4715 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 4716 void *data, struct drm_file *file_priv) 4717 { 4718 struct drm_mode_crtc_lut *crtc_lut = data; 4719 struct drm_crtc *crtc; 4720 void *r_base, *g_base, *b_base; 4721 int size; 4722 int ret = 0; 4723 4724 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4725 return -EINVAL; 4726 4727 drm_modeset_lock_all(dev); 4728 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 4729 if (!crtc) { 4730 ret = -ENOENT; 4731 goto out; 4732 } 4733 4734 if (crtc->funcs->gamma_set == NULL) { 4735 ret = -ENOSYS; 4736 goto out; 4737 } 4738 4739 /* memcpy into gamma store */ 4740 if (crtc_lut->gamma_size != crtc->gamma_size) { 4741 ret = -EINVAL; 4742 goto out; 4743 } 4744 4745 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 4746 r_base = crtc->gamma_store; 4747 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 4748 ret = -EFAULT; 4749 goto out; 4750 } 4751 4752 g_base = r_base + size; 4753 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 4754 ret = -EFAULT; 4755 goto out; 4756 } 4757 4758 b_base = g_base + size; 4759 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 4760 ret = -EFAULT; 4761 goto out; 4762 } 4763 4764 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 4765 4766 out: 4767 drm_modeset_unlock_all(dev); 4768 return ret; 4769 4770 } 4771 4772 /** 4773 * drm_mode_gamma_get_ioctl - get the gamma table 4774 * @dev: DRM device 4775 * @data: ioctl data 4776 * @file_priv: DRM file info 4777 * 4778 * Copy the current gamma table into the storage provided. This also provides 4779 * the gamma table size the driver expects, which can be used to size the 4780 * allocated storage. 4781 * 4782 * Called by the user via ioctl. 4783 * 4784 * Returns: 4785 * Zero on success, negative errno on failure. 4786 */ 4787 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 4788 void *data, struct drm_file *file_priv) 4789 { 4790 struct drm_mode_crtc_lut *crtc_lut = data; 4791 struct drm_crtc *crtc; 4792 void *r_base, *g_base, *b_base; 4793 int size; 4794 int ret = 0; 4795 4796 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4797 return -EINVAL; 4798 4799 drm_modeset_lock_all(dev); 4800 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 4801 if (!crtc) { 4802 ret = -ENOENT; 4803 goto out; 4804 } 4805 4806 /* memcpy into gamma store */ 4807 if (crtc_lut->gamma_size != crtc->gamma_size) { 4808 ret = -EINVAL; 4809 goto out; 4810 } 4811 4812 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 4813 r_base = crtc->gamma_store; 4814 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 4815 ret = -EFAULT; 4816 goto out; 4817 } 4818 4819 g_base = r_base + size; 4820 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 4821 ret = -EFAULT; 4822 goto out; 4823 } 4824 4825 b_base = g_base + size; 4826 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 4827 ret = -EFAULT; 4828 goto out; 4829 } 4830 out: 4831 drm_modeset_unlock_all(dev); 4832 return ret; 4833 } 4834 4835 /** 4836 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 4837 * @dev: DRM device 4838 * @data: ioctl data 4839 * @file_priv: DRM file info 4840 * 4841 * This schedules an asynchronous update on a given CRTC, called page flip. 4842 * Optionally a drm event is generated to signal the completion of the event. 4843 * Generic drivers cannot assume that a pageflip with changed framebuffer 4844 * properties (including driver specific metadata like tiling layout) will work, 4845 * but some drivers support e.g. pixel format changes through the pageflip 4846 * ioctl. 4847 * 4848 * Called by the user via ioctl. 4849 * 4850 * Returns: 4851 * Zero on success, negative errno on failure. 4852 */ 4853 int drm_mode_page_flip_ioctl(struct drm_device *dev, 4854 void *data, struct drm_file *file_priv) 4855 { 4856 struct drm_mode_crtc_page_flip *page_flip = data; 4857 struct drm_crtc *crtc; 4858 struct drm_framebuffer *fb = NULL; 4859 struct drm_pending_vblank_event *e = NULL; 4860 unsigned long flags; 4861 int ret = -EINVAL; 4862 4863 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 4864 page_flip->reserved != 0) 4865 return -EINVAL; 4866 4867 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 4868 return -EINVAL; 4869 4870 crtc = drm_crtc_find(dev, page_flip->crtc_id); 4871 if (!crtc) 4872 return -ENOENT; 4873 4874 drm_modeset_lock_crtc(crtc, crtc->primary); 4875 if (crtc->primary->fb == NULL) { 4876 /* The framebuffer is currently unbound, presumably 4877 * due to a hotplug event, that userspace has not 4878 * yet discovered. 4879 */ 4880 ret = -EBUSY; 4881 goto out; 4882 } 4883 4884 if (crtc->funcs->page_flip == NULL) 4885 goto out; 4886 4887 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 4888 if (!fb) { 4889 ret = -ENOENT; 4890 goto out; 4891 } 4892 4893 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 4894 if (ret) 4895 goto out; 4896 4897 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 4898 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 4899 ret = -EINVAL; 4900 goto out; 4901 } 4902 4903 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 4904 ret = -ENOMEM; 4905 spin_lock_irqsave(&dev->event_lock, flags); 4906 if (file_priv->event_space < sizeof(e->event)) { 4907 spin_unlock_irqrestore(&dev->event_lock, flags); 4908 goto out; 4909 } 4910 file_priv->event_space -= sizeof(e->event); 4911 spin_unlock_irqrestore(&dev->event_lock, flags); 4912 4913 e = kzalloc(sizeof(*e), GFP_KERNEL); 4914 if (e == NULL) { 4915 spin_lock_irqsave(&dev->event_lock, flags); 4916 file_priv->event_space += sizeof(e->event); 4917 spin_unlock_irqrestore(&dev->event_lock, flags); 4918 goto out; 4919 } 4920 4921 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 4922 e->event.base.length = sizeof(e->event); 4923 e->event.user_data = page_flip->user_data; 4924 e->base.event = &e->event.base; 4925 e->base.file_priv = file_priv; 4926 e->base.destroy = 4927 (void (*) (struct drm_pending_event *)) kfree; 4928 } 4929 4930 crtc->primary->old_fb = crtc->primary->fb; 4931 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 4932 if (ret) { 4933 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 4934 spin_lock_irqsave(&dev->event_lock, flags); 4935 file_priv->event_space += sizeof(e->event); 4936 spin_unlock_irqrestore(&dev->event_lock, flags); 4937 kfree(e); 4938 } 4939 /* Keep the old fb, don't unref it. */ 4940 crtc->primary->old_fb = NULL; 4941 } else { 4942 /* 4943 * Warn if the driver hasn't properly updated the crtc->fb 4944 * field to reflect that the new framebuffer is now used. 4945 * Failing to do so will screw with the reference counting 4946 * on framebuffers. 4947 */ 4948 WARN_ON(crtc->primary->fb != fb); 4949 /* Unref only the old framebuffer. */ 4950 fb = NULL; 4951 } 4952 4953 out: 4954 if (fb) 4955 drm_framebuffer_unreference(fb); 4956 if (crtc->primary->old_fb) 4957 drm_framebuffer_unreference(crtc->primary->old_fb); 4958 crtc->primary->old_fb = NULL; 4959 drm_modeset_unlock_crtc(crtc); 4960 4961 return ret; 4962 } 4963 4964 /** 4965 * drm_mode_config_reset - call ->reset callbacks 4966 * @dev: drm device 4967 * 4968 * This functions calls all the crtc's, encoder's and connector's ->reset 4969 * callback. Drivers can use this in e.g. their driver load or resume code to 4970 * reset hardware and software state. 4971 */ 4972 void drm_mode_config_reset(struct drm_device *dev) 4973 { 4974 struct drm_crtc *crtc; 4975 struct drm_plane *plane; 4976 struct drm_encoder *encoder; 4977 struct drm_connector *connector; 4978 4979 list_for_each_entry(plane, &dev->mode_config.plane_list, head) 4980 if (plane->funcs->reset) 4981 plane->funcs->reset(plane); 4982 4983 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 4984 if (crtc->funcs->reset) 4985 crtc->funcs->reset(crtc); 4986 4987 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 4988 if (encoder->funcs->reset) 4989 encoder->funcs->reset(encoder); 4990 4991 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 4992 connector->status = connector_status_unknown; 4993 4994 if (connector->funcs->reset) 4995 connector->funcs->reset(connector); 4996 } 4997 } 4998 EXPORT_SYMBOL(drm_mode_config_reset); 4999 5000 /** 5001 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 5002 * @dev: DRM device 5003 * @data: ioctl data 5004 * @file_priv: DRM file info 5005 * 5006 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 5007 * TTM or something else entirely) and returns the resulting buffer handle. This 5008 * handle can then be wrapped up into a framebuffer modeset object. 5009 * 5010 * Note that userspace is not allowed to use such objects for render 5011 * acceleration - drivers must create their own private ioctls for such a use 5012 * case. 5013 * 5014 * Called by the user via ioctl. 5015 * 5016 * Returns: 5017 * Zero on success, negative errno on failure. 5018 */ 5019 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 5020 void *data, struct drm_file *file_priv) 5021 { 5022 struct drm_mode_create_dumb *args = data; 5023 u32 cpp, stride, size; 5024 5025 if (!dev->driver->dumb_create) 5026 return -ENOSYS; 5027 if (!args->width || !args->height || !args->bpp) 5028 return -EINVAL; 5029 5030 /* overflow checks for 32bit size calculations */ 5031 /* NOTE: DIV_ROUND_UP() can overflow */ 5032 cpp = DIV_ROUND_UP(args->bpp, 8); 5033 if (!cpp || cpp > 0xffffffffU / args->width) 5034 return -EINVAL; 5035 stride = cpp * args->width; 5036 if (args->height > 0xffffffffU / stride) 5037 return -EINVAL; 5038 5039 /* test for wrap-around */ 5040 size = args->height * stride; 5041 if (PAGE_ALIGN(size) == 0) 5042 return -EINVAL; 5043 5044 /* 5045 * handle, pitch and size are output parameters. Zero them out to 5046 * prevent drivers from accidentally using uninitialized data. Since 5047 * not all existing userspace is clearing these fields properly we 5048 * cannot reject IOCTL with garbage in them. 5049 */ 5050 args->handle = 0; 5051 args->pitch = 0; 5052 args->size = 0; 5053 5054 return dev->driver->dumb_create(file_priv, dev, args); 5055 } 5056 5057 /** 5058 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 5059 * @dev: DRM device 5060 * @data: ioctl data 5061 * @file_priv: DRM file info 5062 * 5063 * Allocate an offset in the drm device node's address space to be able to 5064 * memory map a dumb buffer. 5065 * 5066 * Called by the user via ioctl. 5067 * 5068 * Returns: 5069 * Zero on success, negative errno on failure. 5070 */ 5071 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 5072 void *data, struct drm_file *file_priv) 5073 { 5074 struct drm_mode_map_dumb *args = data; 5075 5076 /* call driver ioctl to get mmap offset */ 5077 if (!dev->driver->dumb_map_offset) 5078 return -ENOSYS; 5079 5080 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 5081 } 5082 5083 /** 5084 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 5085 * @dev: DRM device 5086 * @data: ioctl data 5087 * @file_priv: DRM file info 5088 * 5089 * This destroys the userspace handle for the given dumb backing storage buffer. 5090 * Since buffer objects must be reference counted in the kernel a buffer object 5091 * won't be immediately freed if a framebuffer modeset object still uses it. 5092 * 5093 * Called by the user via ioctl. 5094 * 5095 * Returns: 5096 * Zero on success, negative errno on failure. 5097 */ 5098 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 5099 void *data, struct drm_file *file_priv) 5100 { 5101 struct drm_mode_destroy_dumb *args = data; 5102 5103 if (!dev->driver->dumb_destroy) 5104 return -ENOSYS; 5105 5106 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 5107 } 5108 5109 /** 5110 * drm_fb_get_bpp_depth - get the bpp/depth values for format 5111 * @format: pixel format (DRM_FORMAT_*) 5112 * @depth: storage for the depth value 5113 * @bpp: storage for the bpp value 5114 * 5115 * This only supports RGB formats here for compat with code that doesn't use 5116 * pixel formats directly yet. 5117 */ 5118 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 5119 int *bpp) 5120 { 5121 switch (format) { 5122 case DRM_FORMAT_C8: 5123 case DRM_FORMAT_RGB332: 5124 case DRM_FORMAT_BGR233: 5125 *depth = 8; 5126 *bpp = 8; 5127 break; 5128 case DRM_FORMAT_XRGB1555: 5129 case DRM_FORMAT_XBGR1555: 5130 case DRM_FORMAT_RGBX5551: 5131 case DRM_FORMAT_BGRX5551: 5132 case DRM_FORMAT_ARGB1555: 5133 case DRM_FORMAT_ABGR1555: 5134 case DRM_FORMAT_RGBA5551: 5135 case DRM_FORMAT_BGRA5551: 5136 *depth = 15; 5137 *bpp = 16; 5138 break; 5139 case DRM_FORMAT_RGB565: 5140 case DRM_FORMAT_BGR565: 5141 *depth = 16; 5142 *bpp = 16; 5143 break; 5144 case DRM_FORMAT_RGB888: 5145 case DRM_FORMAT_BGR888: 5146 *depth = 24; 5147 *bpp = 24; 5148 break; 5149 case DRM_FORMAT_XRGB8888: 5150 case DRM_FORMAT_XBGR8888: 5151 case DRM_FORMAT_RGBX8888: 5152 case DRM_FORMAT_BGRX8888: 5153 *depth = 24; 5154 *bpp = 32; 5155 break; 5156 case DRM_FORMAT_XRGB2101010: 5157 case DRM_FORMAT_XBGR2101010: 5158 case DRM_FORMAT_RGBX1010102: 5159 case DRM_FORMAT_BGRX1010102: 5160 case DRM_FORMAT_ARGB2101010: 5161 case DRM_FORMAT_ABGR2101010: 5162 case DRM_FORMAT_RGBA1010102: 5163 case DRM_FORMAT_BGRA1010102: 5164 *depth = 30; 5165 *bpp = 32; 5166 break; 5167 case DRM_FORMAT_ARGB8888: 5168 case DRM_FORMAT_ABGR8888: 5169 case DRM_FORMAT_RGBA8888: 5170 case DRM_FORMAT_BGRA8888: 5171 *depth = 32; 5172 *bpp = 32; 5173 break; 5174 default: 5175 DRM_DEBUG_KMS("unsupported pixel format %s\n", 5176 drm_get_format_name(format)); 5177 *depth = 0; 5178 *bpp = 0; 5179 break; 5180 } 5181 } 5182 EXPORT_SYMBOL(drm_fb_get_bpp_depth); 5183 5184 /** 5185 * drm_format_num_planes - get the number of planes for format 5186 * @format: pixel format (DRM_FORMAT_*) 5187 * 5188 * Returns: 5189 * The number of planes used by the specified pixel format. 5190 */ 5191 int drm_format_num_planes(uint32_t format) 5192 { 5193 switch (format) { 5194 case DRM_FORMAT_YUV410: 5195 case DRM_FORMAT_YVU410: 5196 case DRM_FORMAT_YUV411: 5197 case DRM_FORMAT_YVU411: 5198 case DRM_FORMAT_YUV420: 5199 case DRM_FORMAT_YVU420: 5200 case DRM_FORMAT_YUV422: 5201 case DRM_FORMAT_YVU422: 5202 case DRM_FORMAT_YUV444: 5203 case DRM_FORMAT_YVU444: 5204 return 3; 5205 case DRM_FORMAT_NV12: 5206 case DRM_FORMAT_NV21: 5207 case DRM_FORMAT_NV16: 5208 case DRM_FORMAT_NV61: 5209 case DRM_FORMAT_NV24: 5210 case DRM_FORMAT_NV42: 5211 return 2; 5212 default: 5213 return 1; 5214 } 5215 } 5216 EXPORT_SYMBOL(drm_format_num_planes); 5217 5218 /** 5219 * drm_format_plane_cpp - determine the bytes per pixel value 5220 * @format: pixel format (DRM_FORMAT_*) 5221 * @plane: plane index 5222 * 5223 * Returns: 5224 * The bytes per pixel value for the specified plane. 5225 */ 5226 int drm_format_plane_cpp(uint32_t format, int plane) 5227 { 5228 unsigned int depth; 5229 int bpp; 5230 5231 if (plane >= drm_format_num_planes(format)) 5232 return 0; 5233 5234 switch (format) { 5235 case DRM_FORMAT_YUYV: 5236 case DRM_FORMAT_YVYU: 5237 case DRM_FORMAT_UYVY: 5238 case DRM_FORMAT_VYUY: 5239 return 2; 5240 case DRM_FORMAT_NV12: 5241 case DRM_FORMAT_NV21: 5242 case DRM_FORMAT_NV16: 5243 case DRM_FORMAT_NV61: 5244 case DRM_FORMAT_NV24: 5245 case DRM_FORMAT_NV42: 5246 return plane ? 2 : 1; 5247 case DRM_FORMAT_YUV410: 5248 case DRM_FORMAT_YVU410: 5249 case DRM_FORMAT_YUV411: 5250 case DRM_FORMAT_YVU411: 5251 case DRM_FORMAT_YUV420: 5252 case DRM_FORMAT_YVU420: 5253 case DRM_FORMAT_YUV422: 5254 case DRM_FORMAT_YVU422: 5255 case DRM_FORMAT_YUV444: 5256 case DRM_FORMAT_YVU444: 5257 return 1; 5258 default: 5259 drm_fb_get_bpp_depth(format, &depth, &bpp); 5260 return bpp >> 3; 5261 } 5262 } 5263 EXPORT_SYMBOL(drm_format_plane_cpp); 5264 5265 /** 5266 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 5267 * @format: pixel format (DRM_FORMAT_*) 5268 * 5269 * Returns: 5270 * The horizontal chroma subsampling factor for the 5271 * specified pixel format. 5272 */ 5273 int drm_format_horz_chroma_subsampling(uint32_t format) 5274 { 5275 switch (format) { 5276 case DRM_FORMAT_YUV411: 5277 case DRM_FORMAT_YVU411: 5278 case DRM_FORMAT_YUV410: 5279 case DRM_FORMAT_YVU410: 5280 return 4; 5281 case DRM_FORMAT_YUYV: 5282 case DRM_FORMAT_YVYU: 5283 case DRM_FORMAT_UYVY: 5284 case DRM_FORMAT_VYUY: 5285 case DRM_FORMAT_NV12: 5286 case DRM_FORMAT_NV21: 5287 case DRM_FORMAT_NV16: 5288 case DRM_FORMAT_NV61: 5289 case DRM_FORMAT_YUV422: 5290 case DRM_FORMAT_YVU422: 5291 case DRM_FORMAT_YUV420: 5292 case DRM_FORMAT_YVU420: 5293 return 2; 5294 default: 5295 return 1; 5296 } 5297 } 5298 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5299 5300 /** 5301 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5302 * @format: pixel format (DRM_FORMAT_*) 5303 * 5304 * Returns: 5305 * The vertical chroma subsampling factor for the 5306 * specified pixel format. 5307 */ 5308 int drm_format_vert_chroma_subsampling(uint32_t format) 5309 { 5310 switch (format) { 5311 case DRM_FORMAT_YUV410: 5312 case DRM_FORMAT_YVU410: 5313 return 4; 5314 case DRM_FORMAT_YUV420: 5315 case DRM_FORMAT_YVU420: 5316 case DRM_FORMAT_NV12: 5317 case DRM_FORMAT_NV21: 5318 return 2; 5319 default: 5320 return 1; 5321 } 5322 } 5323 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5324 5325 /** 5326 * drm_rotation_simplify() - Try to simplify the rotation 5327 * @rotation: Rotation to be simplified 5328 * @supported_rotations: Supported rotations 5329 * 5330 * Attempt to simplify the rotation to a form that is supported. 5331 * Eg. if the hardware supports everything except DRM_REFLECT_X 5332 * one could call this function like this: 5333 * 5334 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5335 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5336 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5337 * 5338 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5339 * transforms the hardware supports, this function may not 5340 * be able to produce a supported transform, so the caller should 5341 * check the result afterwards. 5342 */ 5343 unsigned int drm_rotation_simplify(unsigned int rotation, 5344 unsigned int supported_rotations) 5345 { 5346 if (rotation & ~supported_rotations) { 5347 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5348 rotation = (rotation & ~0xf) | BIT((ffs(rotation & 0xf) + 1) % 4); 5349 } 5350 5351 return rotation; 5352 } 5353 EXPORT_SYMBOL(drm_rotation_simplify); 5354 5355 /** 5356 * drm_mode_config_init - initialize DRM mode_configuration structure 5357 * @dev: DRM device 5358 * 5359 * Initialize @dev's mode_config structure, used for tracking the graphics 5360 * configuration of @dev. 5361 * 5362 * Since this initializes the modeset locks, no locking is possible. Which is no 5363 * problem, since this should happen single threaded at init time. It is the 5364 * driver's problem to ensure this guarantee. 5365 * 5366 */ 5367 void drm_mode_config_init(struct drm_device *dev) 5368 { 5369 mutex_init(&dev->mode_config.mutex); 5370 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5371 mutex_init(&dev->mode_config.idr_mutex); 5372 mutex_init(&dev->mode_config.fb_lock); 5373 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5374 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5375 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5376 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5377 INIT_LIST_HEAD(&dev->mode_config.property_list); 5378 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5379 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5380 idr_init(&dev->mode_config.crtc_idr); 5381 idr_init(&dev->mode_config.tile_idr); 5382 5383 drm_modeset_lock_all(dev); 5384 drm_mode_create_standard_properties(dev); 5385 drm_modeset_unlock_all(dev); 5386 5387 /* Just to be sure */ 5388 dev->mode_config.num_fb = 0; 5389 dev->mode_config.num_connector = 0; 5390 dev->mode_config.num_crtc = 0; 5391 dev->mode_config.num_encoder = 0; 5392 dev->mode_config.num_overlay_plane = 0; 5393 dev->mode_config.num_total_plane = 0; 5394 } 5395 EXPORT_SYMBOL(drm_mode_config_init); 5396 5397 /** 5398 * drm_mode_config_cleanup - free up DRM mode_config info 5399 * @dev: DRM device 5400 * 5401 * Free up all the connectors and CRTCs associated with this DRM device, then 5402 * free up the framebuffers and associated buffer objects. 5403 * 5404 * Note that since this /should/ happen single-threaded at driver/device 5405 * teardown time, no locking is required. It's the driver's job to ensure that 5406 * this guarantee actually holds true. 5407 * 5408 * FIXME: cleanup any dangling user buffer objects too 5409 */ 5410 void drm_mode_config_cleanup(struct drm_device *dev) 5411 { 5412 struct drm_connector *connector, *ot; 5413 struct drm_crtc *crtc, *ct; 5414 struct drm_encoder *encoder, *enct; 5415 struct drm_framebuffer *fb, *fbt; 5416 struct drm_property *property, *pt; 5417 struct drm_property_blob *blob, *bt; 5418 struct drm_plane *plane, *plt; 5419 5420 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5421 head) { 5422 encoder->funcs->destroy(encoder); 5423 } 5424 5425 list_for_each_entry_safe(connector, ot, 5426 &dev->mode_config.connector_list, head) { 5427 connector->funcs->destroy(connector); 5428 } 5429 5430 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5431 head) { 5432 drm_property_destroy(dev, property); 5433 } 5434 5435 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5436 head) { 5437 drm_property_destroy_blob(dev, blob); 5438 } 5439 5440 /* 5441 * Single-threaded teardown context, so it's not required to grab the 5442 * fb_lock to protect against concurrent fb_list access. Contrary, it 5443 * would actually deadlock with the drm_framebuffer_cleanup function. 5444 * 5445 * Also, if there are any framebuffers left, that's a driver leak now, 5446 * so politely WARN about this. 5447 */ 5448 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5449 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5450 drm_framebuffer_remove(fb); 5451 } 5452 5453 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5454 head) { 5455 plane->funcs->destroy(plane); 5456 } 5457 5458 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5459 crtc->funcs->destroy(crtc); 5460 } 5461 5462 idr_destroy(&dev->mode_config.tile_idr); 5463 idr_destroy(&dev->mode_config.crtc_idr); 5464 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5465 } 5466 EXPORT_SYMBOL(drm_mode_config_cleanup); 5467 5468 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5469 unsigned int supported_rotations) 5470 { 5471 static const struct drm_prop_enum_list props[] = { 5472 { DRM_ROTATE_0, "rotate-0" }, 5473 { DRM_ROTATE_90, "rotate-90" }, 5474 { DRM_ROTATE_180, "rotate-180" }, 5475 { DRM_ROTATE_270, "rotate-270" }, 5476 { DRM_REFLECT_X, "reflect-x" }, 5477 { DRM_REFLECT_Y, "reflect-y" }, 5478 }; 5479 5480 return drm_property_create_bitmask(dev, 0, "rotation", 5481 props, ARRAY_SIZE(props), 5482 supported_rotations); 5483 } 5484 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5485 5486 /** 5487 * DOC: Tile group 5488 * 5489 * Tile groups are used to represent tiled monitors with a unique 5490 * integer identifier. Tiled monitors using DisplayID v1.3 have 5491 * a unique 8-byte handle, we store this in a tile group, so we 5492 * have a common identifier for all tiles in a monitor group. 5493 */ 5494 static void drm_tile_group_free(struct kref *kref) 5495 { 5496 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5497 struct drm_device *dev = tg->dev; 5498 mutex_lock(&dev->mode_config.idr_mutex); 5499 idr_remove(&dev->mode_config.tile_idr, tg->id); 5500 mutex_unlock(&dev->mode_config.idr_mutex); 5501 kfree(tg); 5502 } 5503 5504 /** 5505 * drm_mode_put_tile_group - drop a reference to a tile group. 5506 * @dev: DRM device 5507 * @tg: tile group to drop reference to. 5508 * 5509 * drop reference to tile group and free if 0. 5510 */ 5511 void drm_mode_put_tile_group(struct drm_device *dev, 5512 struct drm_tile_group *tg) 5513 { 5514 kref_put(&tg->refcount, drm_tile_group_free); 5515 } 5516 5517 /** 5518 * drm_mode_get_tile_group - get a reference to an existing tile group 5519 * @dev: DRM device 5520 * @topology: 8-bytes unique per monitor. 5521 * 5522 * Use the unique bytes to get a reference to an existing tile group. 5523 * 5524 * RETURNS: 5525 * tile group or NULL if not found. 5526 */ 5527 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 5528 char topology[8]) 5529 { 5530 struct drm_tile_group *tg; 5531 int id; 5532 mutex_lock(&dev->mode_config.idr_mutex); 5533 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 5534 if (!memcmp(tg->group_data, topology, 8)) { 5535 if (!kref_get_unless_zero(&tg->refcount)) 5536 tg = NULL; 5537 mutex_unlock(&dev->mode_config.idr_mutex); 5538 return tg; 5539 } 5540 } 5541 mutex_unlock(&dev->mode_config.idr_mutex); 5542 return NULL; 5543 } 5544 5545 /** 5546 * drm_mode_create_tile_group - create a tile group from a displayid description 5547 * @dev: DRM device 5548 * @topology: 8-bytes unique per monitor. 5549 * 5550 * Create a tile group for the unique monitor, and get a unique 5551 * identifier for the tile group. 5552 * 5553 * RETURNS: 5554 * new tile group or error. 5555 */ 5556 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 5557 char topology[8]) 5558 { 5559 struct drm_tile_group *tg; 5560 int ret; 5561 5562 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 5563 if (!tg) 5564 return ERR_PTR(-ENOMEM); 5565 5566 kref_init(&tg->refcount); 5567 memcpy(tg->group_data, topology, 8); 5568 tg->dev = dev; 5569 5570 mutex_lock(&dev->mode_config.idr_mutex); 5571 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 5572 if (ret >= 0) { 5573 tg->id = ret; 5574 } else { 5575 kfree(tg); 5576 tg = ERR_PTR(ret); 5577 } 5578 5579 mutex_unlock(&dev->mode_config.idr_mutex); 5580 return tg; 5581 } 5582