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 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); 664 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); 665 666 crtc->dev = dev; 667 crtc->funcs = funcs; 668 crtc->invert_dimensions = false; 669 670 drm_modeset_lock_init(&crtc->mutex); 671 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 672 if (ret) 673 return ret; 674 675 crtc->base.properties = &crtc->properties; 676 677 list_add_tail(&crtc->head, &config->crtc_list); 678 config->num_crtc++; 679 680 crtc->primary = primary; 681 crtc->cursor = cursor; 682 if (primary) 683 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 684 if (cursor) 685 cursor->possible_crtcs = 1 << drm_crtc_index(crtc); 686 687 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 688 drm_object_attach_property(&crtc->base, config->prop_active, 0); 689 } 690 691 return 0; 692 } 693 EXPORT_SYMBOL(drm_crtc_init_with_planes); 694 695 /** 696 * drm_crtc_cleanup - Clean up the core crtc usage 697 * @crtc: CRTC to cleanup 698 * 699 * This function cleans up @crtc and removes it from the DRM mode setting 700 * core. Note that the function does *not* free the crtc structure itself, 701 * this is the responsibility of the caller. 702 */ 703 void drm_crtc_cleanup(struct drm_crtc *crtc) 704 { 705 struct drm_device *dev = crtc->dev; 706 707 kfree(crtc->gamma_store); 708 crtc->gamma_store = NULL; 709 710 drm_modeset_lock_fini(&crtc->mutex); 711 712 drm_mode_object_put(dev, &crtc->base); 713 list_del(&crtc->head); 714 dev->mode_config.num_crtc--; 715 716 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); 717 if (crtc->state && crtc->funcs->atomic_destroy_state) 718 crtc->funcs->atomic_destroy_state(crtc, crtc->state); 719 720 memset(crtc, 0, sizeof(*crtc)); 721 } 722 EXPORT_SYMBOL(drm_crtc_cleanup); 723 724 /** 725 * drm_crtc_index - find the index of a registered CRTC 726 * @crtc: CRTC to find index for 727 * 728 * Given a registered CRTC, return the index of that CRTC within a DRM 729 * device's list of CRTCs. 730 */ 731 unsigned int drm_crtc_index(struct drm_crtc *crtc) 732 { 733 unsigned int index = 0; 734 struct drm_crtc *tmp; 735 736 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { 737 if (tmp == crtc) 738 return index; 739 740 index++; 741 } 742 743 BUG(); 744 } 745 EXPORT_SYMBOL(drm_crtc_index); 746 747 /* 748 * drm_mode_remove - remove and free a mode 749 * @connector: connector list to modify 750 * @mode: mode to remove 751 * 752 * Remove @mode from @connector's mode list, then free it. 753 */ 754 static void drm_mode_remove(struct drm_connector *connector, 755 struct drm_display_mode *mode) 756 { 757 list_del(&mode->head); 758 drm_mode_destroy(connector->dev, mode); 759 } 760 761 /** 762 * drm_display_info_set_bus_formats - set the supported bus formats 763 * @info: display info to store bus formats in 764 * @formats: array containing the supported bus formats 765 * @num_formats: the number of entries in the fmts array 766 * 767 * Store the supported bus formats in display info structure. 768 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for 769 * a full list of available formats. 770 */ 771 int drm_display_info_set_bus_formats(struct drm_display_info *info, 772 const u32 *formats, 773 unsigned int num_formats) 774 { 775 u32 *fmts = NULL; 776 777 if (!formats && num_formats) 778 return -EINVAL; 779 780 if (formats && num_formats) { 781 fmts = kmemdup(formats, sizeof(*formats) * num_formats, 782 GFP_KERNEL); 783 if (!fmts) 784 return -ENOMEM; 785 } 786 787 kfree(info->bus_formats); 788 info->bus_formats = fmts; 789 info->num_bus_formats = num_formats; 790 791 return 0; 792 } 793 EXPORT_SYMBOL(drm_display_info_set_bus_formats); 794 795 /** 796 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 797 * @connector: connector to quwery 798 * 799 * The kernel supports per-connector configration of its consoles through 800 * use of the video= parameter. This function parses that option and 801 * extracts the user's specified mode (or enable/disable status) for a 802 * particular connector. This is typically only used during the early fbdev 803 * setup. 804 */ 805 static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 806 { 807 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 808 char *option = NULL; 809 810 if (fb_get_options(connector->name, &option)) 811 return; 812 813 if (!drm_mode_parse_command_line_for_connector(option, 814 connector, 815 mode)) 816 return; 817 818 if (mode->force) { 819 const char *s; 820 821 switch (mode->force) { 822 case DRM_FORCE_OFF: 823 s = "OFF"; 824 break; 825 case DRM_FORCE_ON_DIGITAL: 826 s = "ON - dig"; 827 break; 828 default: 829 case DRM_FORCE_ON: 830 s = "ON"; 831 break; 832 } 833 834 DRM_INFO("forcing %s connector %s\n", connector->name, s); 835 connector->force = mode->force; 836 } 837 838 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 839 connector->name, 840 mode->xres, mode->yres, 841 mode->refresh_specified ? mode->refresh : 60, 842 mode->rb ? " reduced blanking" : "", 843 mode->margins ? " with margins" : "", 844 mode->interlace ? " interlaced" : ""); 845 } 846 847 /** 848 * drm_connector_init - Init a preallocated connector 849 * @dev: DRM device 850 * @connector: the connector to init 851 * @funcs: callbacks for this connector 852 * @connector_type: user visible type of the connector 853 * 854 * Initialises a preallocated connector. Connectors should be 855 * subclassed as part of driver connector objects. 856 * 857 * Returns: 858 * Zero on success, error code on failure. 859 */ 860 int drm_connector_init(struct drm_device *dev, 861 struct drm_connector *connector, 862 const struct drm_connector_funcs *funcs, 863 int connector_type) 864 { 865 struct drm_mode_config *config = &dev->mode_config; 866 int ret; 867 struct ida *connector_ida = 868 &drm_connector_enum_list[connector_type].ida; 869 870 drm_modeset_lock_all(dev); 871 872 ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false); 873 if (ret) 874 goto out_unlock; 875 876 connector->base.properties = &connector->properties; 877 connector->dev = dev; 878 connector->funcs = funcs; 879 connector->connector_type = connector_type; 880 connector->connector_type_id = 881 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); 882 if (connector->connector_type_id < 0) { 883 ret = connector->connector_type_id; 884 goto out_put; 885 } 886 connector->name = 887 kasprintf(GFP_KERNEL, "%s-%d", 888 drm_connector_enum_list[connector_type].name, 889 connector->connector_type_id); 890 if (!connector->name) { 891 ret = -ENOMEM; 892 goto out_put; 893 } 894 895 INIT_LIST_HEAD(&connector->probed_modes); 896 INIT_LIST_HEAD(&connector->modes); 897 connector->edid_blob_ptr = NULL; 898 connector->status = connector_status_unknown; 899 900 drm_connector_get_cmdline_mode(connector); 901 902 /* We should add connectors at the end to avoid upsetting the connector 903 * index too much. */ 904 list_add_tail(&connector->head, &config->connector_list); 905 config->num_connector++; 906 907 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 908 drm_object_attach_property(&connector->base, 909 config->edid_property, 910 0); 911 912 drm_object_attach_property(&connector->base, 913 config->dpms_property, 0); 914 915 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 916 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); 917 } 918 919 connector->debugfs_entry = NULL; 920 921 out_put: 922 if (ret) 923 drm_mode_object_put(dev, &connector->base); 924 925 out_unlock: 926 drm_modeset_unlock_all(dev); 927 928 return ret; 929 } 930 EXPORT_SYMBOL(drm_connector_init); 931 932 /** 933 * drm_connector_cleanup - cleans up an initialised connector 934 * @connector: connector to cleanup 935 * 936 * Cleans up the connector but doesn't free the object. 937 */ 938 void drm_connector_cleanup(struct drm_connector *connector) 939 { 940 struct drm_device *dev = connector->dev; 941 struct drm_display_mode *mode, *t; 942 943 if (connector->tile_group) { 944 drm_mode_put_tile_group(dev, connector->tile_group); 945 connector->tile_group = NULL; 946 } 947 948 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 949 drm_mode_remove(connector, mode); 950 951 list_for_each_entry_safe(mode, t, &connector->modes, head) 952 drm_mode_remove(connector, mode); 953 954 ida_remove(&drm_connector_enum_list[connector->connector_type].ida, 955 connector->connector_type_id); 956 957 kfree(connector->display_info.bus_formats); 958 drm_mode_object_put(dev, &connector->base); 959 kfree(connector->name); 960 connector->name = NULL; 961 list_del(&connector->head); 962 dev->mode_config.num_connector--; 963 964 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 965 if (connector->state && connector->funcs->atomic_destroy_state) 966 connector->funcs->atomic_destroy_state(connector, 967 connector->state); 968 969 memset(connector, 0, sizeof(*connector)); 970 } 971 EXPORT_SYMBOL(drm_connector_cleanup); 972 973 /** 974 * drm_connector_index - find the index of a registered connector 975 * @connector: connector to find index for 976 * 977 * Given a registered connector, return the index of that connector within a DRM 978 * device's list of connectors. 979 */ 980 unsigned int drm_connector_index(struct drm_connector *connector) 981 { 982 unsigned int index = 0; 983 struct drm_connector *tmp; 984 struct drm_mode_config *config = &connector->dev->mode_config; 985 986 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 987 988 list_for_each_entry(tmp, &connector->dev->mode_config.connector_list, head) { 989 if (tmp == connector) 990 return index; 991 992 index++; 993 } 994 995 BUG(); 996 } 997 EXPORT_SYMBOL(drm_connector_index); 998 999 /** 1000 * drm_connector_register - register a connector 1001 * @connector: the connector to register 1002 * 1003 * Register userspace interfaces for a connector 1004 * 1005 * Returns: 1006 * Zero on success, error code on failure. 1007 */ 1008 int drm_connector_register(struct drm_connector *connector) 1009 { 1010 int ret; 1011 1012 drm_mode_object_register(connector->dev, &connector->base); 1013 1014 ret = drm_sysfs_connector_add(connector); 1015 if (ret) 1016 return ret; 1017 1018 ret = drm_debugfs_connector_add(connector); 1019 if (ret) { 1020 drm_sysfs_connector_remove(connector); 1021 return ret; 1022 } 1023 1024 return 0; 1025 } 1026 EXPORT_SYMBOL(drm_connector_register); 1027 1028 /** 1029 * drm_connector_unregister - unregister a connector 1030 * @connector: the connector to unregister 1031 * 1032 * Unregister userspace interfaces for a connector 1033 */ 1034 void drm_connector_unregister(struct drm_connector *connector) 1035 { 1036 drm_sysfs_connector_remove(connector); 1037 drm_debugfs_connector_remove(connector); 1038 } 1039 EXPORT_SYMBOL(drm_connector_unregister); 1040 1041 1042 /** 1043 * drm_connector_unplug_all - unregister connector userspace interfaces 1044 * @dev: drm device 1045 * 1046 * This function unregisters all connector userspace interfaces in sysfs. Should 1047 * be call when the device is disconnected, e.g. from an usb driver's 1048 * ->disconnect callback. 1049 */ 1050 void drm_connector_unplug_all(struct drm_device *dev) 1051 { 1052 struct drm_connector *connector; 1053 1054 /* taking the mode config mutex ends up in a clash with sysfs */ 1055 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1056 drm_connector_unregister(connector); 1057 1058 } 1059 EXPORT_SYMBOL(drm_connector_unplug_all); 1060 1061 /** 1062 * drm_encoder_init - Init a preallocated encoder 1063 * @dev: drm device 1064 * @encoder: the encoder to init 1065 * @funcs: callbacks for this encoder 1066 * @encoder_type: user visible type of the encoder 1067 * 1068 * Initialises a preallocated encoder. Encoder should be 1069 * subclassed as part of driver encoder objects. 1070 * 1071 * Returns: 1072 * Zero on success, error code on failure. 1073 */ 1074 int drm_encoder_init(struct drm_device *dev, 1075 struct drm_encoder *encoder, 1076 const struct drm_encoder_funcs *funcs, 1077 int encoder_type) 1078 { 1079 int ret; 1080 1081 drm_modeset_lock_all(dev); 1082 1083 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1084 if (ret) 1085 goto out_unlock; 1086 1087 encoder->dev = dev; 1088 encoder->encoder_type = encoder_type; 1089 encoder->funcs = funcs; 1090 encoder->name = kasprintf(GFP_KERNEL, "%s-%d", 1091 drm_encoder_enum_list[encoder_type].name, 1092 encoder->base.id); 1093 if (!encoder->name) { 1094 ret = -ENOMEM; 1095 goto out_put; 1096 } 1097 1098 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1099 dev->mode_config.num_encoder++; 1100 1101 out_put: 1102 if (ret) 1103 drm_mode_object_put(dev, &encoder->base); 1104 1105 out_unlock: 1106 drm_modeset_unlock_all(dev); 1107 1108 return ret; 1109 } 1110 EXPORT_SYMBOL(drm_encoder_init); 1111 1112 /** 1113 * drm_encoder_cleanup - cleans up an initialised encoder 1114 * @encoder: encoder to cleanup 1115 * 1116 * Cleans up the encoder but doesn't free the object. 1117 */ 1118 void drm_encoder_cleanup(struct drm_encoder *encoder) 1119 { 1120 struct drm_device *dev = encoder->dev; 1121 1122 drm_modeset_lock_all(dev); 1123 drm_mode_object_put(dev, &encoder->base); 1124 kfree(encoder->name); 1125 list_del(&encoder->head); 1126 dev->mode_config.num_encoder--; 1127 drm_modeset_unlock_all(dev); 1128 1129 memset(encoder, 0, sizeof(*encoder)); 1130 } 1131 EXPORT_SYMBOL(drm_encoder_cleanup); 1132 1133 /** 1134 * drm_universal_plane_init - Initialize a new universal plane object 1135 * @dev: DRM device 1136 * @plane: plane object to init 1137 * @possible_crtcs: bitmask of possible CRTCs 1138 * @funcs: callbacks for the new plane 1139 * @formats: array of supported formats (%DRM_FORMAT_*) 1140 * @format_count: number of elements in @formats 1141 * @type: type of plane (overlay, primary, cursor) 1142 * 1143 * Initializes a plane object of type @type. 1144 * 1145 * Returns: 1146 * Zero on success, error code on failure. 1147 */ 1148 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1149 unsigned long possible_crtcs, 1150 const struct drm_plane_funcs *funcs, 1151 const uint32_t *formats, uint32_t format_count, 1152 enum drm_plane_type type) 1153 { 1154 struct drm_mode_config *config = &dev->mode_config; 1155 int ret; 1156 1157 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1158 if (ret) 1159 return ret; 1160 1161 drm_modeset_lock_init(&plane->mutex); 1162 1163 plane->base.properties = &plane->properties; 1164 plane->dev = dev; 1165 plane->funcs = funcs; 1166 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t), 1167 GFP_KERNEL); 1168 if (!plane->format_types) { 1169 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1170 drm_mode_object_put(dev, &plane->base); 1171 return -ENOMEM; 1172 } 1173 1174 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1175 plane->format_count = format_count; 1176 plane->possible_crtcs = possible_crtcs; 1177 plane->type = type; 1178 1179 list_add_tail(&plane->head, &config->plane_list); 1180 config->num_total_plane++; 1181 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1182 config->num_overlay_plane++; 1183 1184 drm_object_attach_property(&plane->base, 1185 config->plane_type_property, 1186 plane->type); 1187 1188 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 1189 drm_object_attach_property(&plane->base, config->prop_fb_id, 0); 1190 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); 1191 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); 1192 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); 1193 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); 1194 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); 1195 drm_object_attach_property(&plane->base, config->prop_src_x, 0); 1196 drm_object_attach_property(&plane->base, config->prop_src_y, 0); 1197 drm_object_attach_property(&plane->base, config->prop_src_w, 0); 1198 drm_object_attach_property(&plane->base, config->prop_src_h, 0); 1199 } 1200 1201 return 0; 1202 } 1203 EXPORT_SYMBOL(drm_universal_plane_init); 1204 1205 /** 1206 * drm_plane_init - Initialize a legacy plane 1207 * @dev: DRM device 1208 * @plane: plane object to init 1209 * @possible_crtcs: bitmask of possible CRTCs 1210 * @funcs: callbacks for the new plane 1211 * @formats: array of supported formats (%DRM_FORMAT_*) 1212 * @format_count: number of elements in @formats 1213 * @is_primary: plane type (primary vs overlay) 1214 * 1215 * Legacy API to initialize a DRM plane. 1216 * 1217 * New drivers should call drm_universal_plane_init() instead. 1218 * 1219 * Returns: 1220 * Zero on success, error code on failure. 1221 */ 1222 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1223 unsigned long possible_crtcs, 1224 const struct drm_plane_funcs *funcs, 1225 const uint32_t *formats, uint32_t format_count, 1226 bool is_primary) 1227 { 1228 enum drm_plane_type type; 1229 1230 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1231 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1232 formats, format_count, type); 1233 } 1234 EXPORT_SYMBOL(drm_plane_init); 1235 1236 /** 1237 * drm_plane_cleanup - Clean up the core plane usage 1238 * @plane: plane to cleanup 1239 * 1240 * This function cleans up @plane and removes it from the DRM mode setting 1241 * core. Note that the function does *not* free the plane structure itself, 1242 * this is the responsibility of the caller. 1243 */ 1244 void drm_plane_cleanup(struct drm_plane *plane) 1245 { 1246 struct drm_device *dev = plane->dev; 1247 1248 drm_modeset_lock_all(dev); 1249 kfree(plane->format_types); 1250 drm_mode_object_put(dev, &plane->base); 1251 1252 BUG_ON(list_empty(&plane->head)); 1253 1254 list_del(&plane->head); 1255 dev->mode_config.num_total_plane--; 1256 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1257 dev->mode_config.num_overlay_plane--; 1258 drm_modeset_unlock_all(dev); 1259 1260 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1261 if (plane->state && plane->funcs->atomic_destroy_state) 1262 plane->funcs->atomic_destroy_state(plane, plane->state); 1263 1264 memset(plane, 0, sizeof(*plane)); 1265 } 1266 EXPORT_SYMBOL(drm_plane_cleanup); 1267 1268 /** 1269 * drm_plane_index - find the index of a registered plane 1270 * @plane: plane to find index for 1271 * 1272 * Given a registered plane, return the index of that CRTC within a DRM 1273 * device's list of planes. 1274 */ 1275 unsigned int drm_plane_index(struct drm_plane *plane) 1276 { 1277 unsigned int index = 0; 1278 struct drm_plane *tmp; 1279 1280 list_for_each_entry(tmp, &plane->dev->mode_config.plane_list, head) { 1281 if (tmp == plane) 1282 return index; 1283 1284 index++; 1285 } 1286 1287 BUG(); 1288 } 1289 EXPORT_SYMBOL(drm_plane_index); 1290 1291 /** 1292 * drm_plane_force_disable - Forcibly disable a plane 1293 * @plane: plane to disable 1294 * 1295 * Forces the plane to be disabled. 1296 * 1297 * Used when the plane's current framebuffer is destroyed, 1298 * and when restoring fbdev mode. 1299 */ 1300 void drm_plane_force_disable(struct drm_plane *plane) 1301 { 1302 int ret; 1303 1304 if (!plane->fb) 1305 return; 1306 1307 plane->old_fb = plane->fb; 1308 ret = plane->funcs->disable_plane(plane); 1309 if (ret) { 1310 DRM_ERROR("failed to disable plane with busy fb\n"); 1311 plane->old_fb = NULL; 1312 return; 1313 } 1314 /* disconnect the plane from the fb and crtc: */ 1315 drm_framebuffer_unreference(plane->old_fb); 1316 plane->old_fb = NULL; 1317 plane->fb = NULL; 1318 plane->crtc = NULL; 1319 } 1320 EXPORT_SYMBOL(drm_plane_force_disable); 1321 1322 static int drm_mode_create_standard_properties(struct drm_device *dev) 1323 { 1324 struct drm_property *prop; 1325 1326 /* 1327 * Standard properties (apply to all connectors) 1328 */ 1329 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1330 DRM_MODE_PROP_IMMUTABLE, 1331 "EDID", 0); 1332 if (!prop) 1333 return -ENOMEM; 1334 dev->mode_config.edid_property = prop; 1335 1336 prop = drm_property_create_enum(dev, 0, 1337 "DPMS", drm_dpms_enum_list, 1338 ARRAY_SIZE(drm_dpms_enum_list)); 1339 if (!prop) 1340 return -ENOMEM; 1341 dev->mode_config.dpms_property = prop; 1342 1343 prop = drm_property_create(dev, 1344 DRM_MODE_PROP_BLOB | 1345 DRM_MODE_PROP_IMMUTABLE, 1346 "PATH", 0); 1347 if (!prop) 1348 return -ENOMEM; 1349 dev->mode_config.path_property = prop; 1350 1351 prop = drm_property_create(dev, 1352 DRM_MODE_PROP_BLOB | 1353 DRM_MODE_PROP_IMMUTABLE, 1354 "TILE", 0); 1355 if (!prop) 1356 return -ENOMEM; 1357 dev->mode_config.tile_property = prop; 1358 1359 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1360 "type", drm_plane_type_enum_list, 1361 ARRAY_SIZE(drm_plane_type_enum_list)); 1362 if (!prop) 1363 return -ENOMEM; 1364 dev->mode_config.plane_type_property = prop; 1365 1366 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1367 "SRC_X", 0, UINT_MAX); 1368 if (!prop) 1369 return -ENOMEM; 1370 dev->mode_config.prop_src_x = prop; 1371 1372 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1373 "SRC_Y", 0, UINT_MAX); 1374 if (!prop) 1375 return -ENOMEM; 1376 dev->mode_config.prop_src_y = prop; 1377 1378 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1379 "SRC_W", 0, UINT_MAX); 1380 if (!prop) 1381 return -ENOMEM; 1382 dev->mode_config.prop_src_w = prop; 1383 1384 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1385 "SRC_H", 0, UINT_MAX); 1386 if (!prop) 1387 return -ENOMEM; 1388 dev->mode_config.prop_src_h = prop; 1389 1390 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1391 "CRTC_X", INT_MIN, INT_MAX); 1392 if (!prop) 1393 return -ENOMEM; 1394 dev->mode_config.prop_crtc_x = prop; 1395 1396 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1397 "CRTC_Y", INT_MIN, INT_MAX); 1398 if (!prop) 1399 return -ENOMEM; 1400 dev->mode_config.prop_crtc_y = prop; 1401 1402 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1403 "CRTC_W", 0, INT_MAX); 1404 if (!prop) 1405 return -ENOMEM; 1406 dev->mode_config.prop_crtc_w = prop; 1407 1408 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1409 "CRTC_H", 0, INT_MAX); 1410 if (!prop) 1411 return -ENOMEM; 1412 dev->mode_config.prop_crtc_h = prop; 1413 1414 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1415 "FB_ID", DRM_MODE_OBJECT_FB); 1416 if (!prop) 1417 return -ENOMEM; 1418 dev->mode_config.prop_fb_id = prop; 1419 1420 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1421 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 1422 if (!prop) 1423 return -ENOMEM; 1424 dev->mode_config.prop_crtc_id = prop; 1425 1426 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 1427 "ACTIVE"); 1428 if (!prop) 1429 return -ENOMEM; 1430 dev->mode_config.prop_active = prop; 1431 1432 return 0; 1433 } 1434 1435 /** 1436 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1437 * @dev: DRM device 1438 * 1439 * Called by a driver the first time a DVI-I connector is made. 1440 */ 1441 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1442 { 1443 struct drm_property *dvi_i_selector; 1444 struct drm_property *dvi_i_subconnector; 1445 1446 if (dev->mode_config.dvi_i_select_subconnector_property) 1447 return 0; 1448 1449 dvi_i_selector = 1450 drm_property_create_enum(dev, 0, 1451 "select subconnector", 1452 drm_dvi_i_select_enum_list, 1453 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1454 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1455 1456 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1457 "subconnector", 1458 drm_dvi_i_subconnector_enum_list, 1459 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1460 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1461 1462 return 0; 1463 } 1464 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1465 1466 /** 1467 * drm_create_tv_properties - create TV specific connector properties 1468 * @dev: DRM device 1469 * @num_modes: number of different TV formats (modes) supported 1470 * @modes: array of pointers to strings containing name of each format 1471 * 1472 * Called by a driver's TV initialization routine, this function creates 1473 * the TV specific connector properties for a given device. Caller is 1474 * responsible for allocating a list of format names and passing them to 1475 * this routine. 1476 */ 1477 int drm_mode_create_tv_properties(struct drm_device *dev, 1478 unsigned int num_modes, 1479 char *modes[]) 1480 { 1481 struct drm_property *tv_selector; 1482 struct drm_property *tv_subconnector; 1483 unsigned int i; 1484 1485 if (dev->mode_config.tv_select_subconnector_property) 1486 return 0; 1487 1488 /* 1489 * Basic connector properties 1490 */ 1491 tv_selector = drm_property_create_enum(dev, 0, 1492 "select subconnector", 1493 drm_tv_select_enum_list, 1494 ARRAY_SIZE(drm_tv_select_enum_list)); 1495 dev->mode_config.tv_select_subconnector_property = tv_selector; 1496 1497 tv_subconnector = 1498 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1499 "subconnector", 1500 drm_tv_subconnector_enum_list, 1501 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1502 dev->mode_config.tv_subconnector_property = tv_subconnector; 1503 1504 /* 1505 * Other, TV specific properties: margins & TV modes. 1506 */ 1507 dev->mode_config.tv_left_margin_property = 1508 drm_property_create_range(dev, 0, "left margin", 0, 100); 1509 1510 dev->mode_config.tv_right_margin_property = 1511 drm_property_create_range(dev, 0, "right margin", 0, 100); 1512 1513 dev->mode_config.tv_top_margin_property = 1514 drm_property_create_range(dev, 0, "top margin", 0, 100); 1515 1516 dev->mode_config.tv_bottom_margin_property = 1517 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1518 1519 dev->mode_config.tv_mode_property = 1520 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1521 "mode", num_modes); 1522 for (i = 0; i < num_modes; i++) 1523 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1524 i, modes[i]); 1525 1526 dev->mode_config.tv_brightness_property = 1527 drm_property_create_range(dev, 0, "brightness", 0, 100); 1528 1529 dev->mode_config.tv_contrast_property = 1530 drm_property_create_range(dev, 0, "contrast", 0, 100); 1531 1532 dev->mode_config.tv_flicker_reduction_property = 1533 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1534 1535 dev->mode_config.tv_overscan_property = 1536 drm_property_create_range(dev, 0, "overscan", 0, 100); 1537 1538 dev->mode_config.tv_saturation_property = 1539 drm_property_create_range(dev, 0, "saturation", 0, 100); 1540 1541 dev->mode_config.tv_hue_property = 1542 drm_property_create_range(dev, 0, "hue", 0, 100); 1543 1544 return 0; 1545 } 1546 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1547 1548 /** 1549 * drm_mode_create_scaling_mode_property - create scaling mode property 1550 * @dev: DRM device 1551 * 1552 * Called by a driver the first time it's needed, must be attached to desired 1553 * connectors. 1554 */ 1555 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1556 { 1557 struct drm_property *scaling_mode; 1558 1559 if (dev->mode_config.scaling_mode_property) 1560 return 0; 1561 1562 scaling_mode = 1563 drm_property_create_enum(dev, 0, "scaling mode", 1564 drm_scaling_mode_enum_list, 1565 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1566 1567 dev->mode_config.scaling_mode_property = scaling_mode; 1568 1569 return 0; 1570 } 1571 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1572 1573 /** 1574 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1575 * @dev: DRM device 1576 * 1577 * Called by a driver the first time it's needed, must be attached to desired 1578 * connectors. 1579 * 1580 * Returns: 1581 * Zero on success, negative errno on failure. 1582 */ 1583 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1584 { 1585 if (dev->mode_config.aspect_ratio_property) 1586 return 0; 1587 1588 dev->mode_config.aspect_ratio_property = 1589 drm_property_create_enum(dev, 0, "aspect ratio", 1590 drm_aspect_ratio_enum_list, 1591 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1592 1593 if (dev->mode_config.aspect_ratio_property == NULL) 1594 return -ENOMEM; 1595 1596 return 0; 1597 } 1598 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1599 1600 /** 1601 * drm_mode_create_dirty_property - create dirty property 1602 * @dev: DRM device 1603 * 1604 * Called by a driver the first time it's needed, must be attached to desired 1605 * connectors. 1606 */ 1607 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1608 { 1609 struct drm_property *dirty_info; 1610 1611 if (dev->mode_config.dirty_info_property) 1612 return 0; 1613 1614 dirty_info = 1615 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1616 "dirty", 1617 drm_dirty_info_enum_list, 1618 ARRAY_SIZE(drm_dirty_info_enum_list)); 1619 dev->mode_config.dirty_info_property = dirty_info; 1620 1621 return 0; 1622 } 1623 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1624 1625 /** 1626 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1627 * @dev: DRM device 1628 * 1629 * Create the the suggested x/y offset property for connectors. 1630 */ 1631 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1632 { 1633 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1634 return 0; 1635 1636 dev->mode_config.suggested_x_property = 1637 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1638 1639 dev->mode_config.suggested_y_property = 1640 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1641 1642 if (dev->mode_config.suggested_x_property == NULL || 1643 dev->mode_config.suggested_y_property == NULL) 1644 return -ENOMEM; 1645 return 0; 1646 } 1647 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1648 1649 static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group) 1650 { 1651 uint32_t total_objects = 0; 1652 1653 total_objects += dev->mode_config.num_crtc; 1654 total_objects += dev->mode_config.num_connector; 1655 total_objects += dev->mode_config.num_encoder; 1656 1657 group->id_list = kcalloc(total_objects, sizeof(uint32_t), GFP_KERNEL); 1658 if (!group->id_list) 1659 return -ENOMEM; 1660 1661 group->num_crtcs = 0; 1662 group->num_connectors = 0; 1663 group->num_encoders = 0; 1664 return 0; 1665 } 1666 1667 void drm_mode_group_destroy(struct drm_mode_group *group) 1668 { 1669 kfree(group->id_list); 1670 group->id_list = NULL; 1671 } 1672 1673 /* 1674 * NOTE: Driver's shouldn't ever call drm_mode_group_init_legacy_group - it is 1675 * the drm core's responsibility to set up mode control groups. 1676 */ 1677 int drm_mode_group_init_legacy_group(struct drm_device *dev, 1678 struct drm_mode_group *group) 1679 { 1680 struct drm_crtc *crtc; 1681 struct drm_encoder *encoder; 1682 struct drm_connector *connector; 1683 int ret; 1684 1685 ret = drm_mode_group_init(dev, group); 1686 if (ret) 1687 return ret; 1688 1689 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 1690 group->id_list[group->num_crtcs++] = crtc->base.id; 1691 1692 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 1693 group->id_list[group->num_crtcs + group->num_encoders++] = 1694 encoder->base.id; 1695 1696 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1697 group->id_list[group->num_crtcs + group->num_encoders + 1698 group->num_connectors++] = connector->base.id; 1699 1700 return 0; 1701 } 1702 EXPORT_SYMBOL(drm_mode_group_init_legacy_group); 1703 1704 void drm_reinit_primary_mode_group(struct drm_device *dev) 1705 { 1706 drm_modeset_lock_all(dev); 1707 drm_mode_group_destroy(&dev->primary->mode_group); 1708 drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group); 1709 drm_modeset_unlock_all(dev); 1710 } 1711 EXPORT_SYMBOL(drm_reinit_primary_mode_group); 1712 1713 /** 1714 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1715 * @out: drm_mode_modeinfo struct to return to the user 1716 * @in: drm_display_mode to use 1717 * 1718 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1719 * the user. 1720 */ 1721 static void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out, 1722 const struct drm_display_mode *in) 1723 { 1724 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || 1725 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || 1726 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || 1727 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || 1728 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, 1729 "timing values too large for mode info\n"); 1730 1731 out->clock = in->clock; 1732 out->hdisplay = in->hdisplay; 1733 out->hsync_start = in->hsync_start; 1734 out->hsync_end = in->hsync_end; 1735 out->htotal = in->htotal; 1736 out->hskew = in->hskew; 1737 out->vdisplay = in->vdisplay; 1738 out->vsync_start = in->vsync_start; 1739 out->vsync_end = in->vsync_end; 1740 out->vtotal = in->vtotal; 1741 out->vscan = in->vscan; 1742 out->vrefresh = in->vrefresh; 1743 out->flags = in->flags; 1744 out->type = in->type; 1745 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1746 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1747 } 1748 1749 /** 1750 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 1751 * @out: drm_display_mode to return to the user 1752 * @in: drm_mode_modeinfo to use 1753 * 1754 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 1755 * the caller. 1756 * 1757 * Returns: 1758 * Zero on success, negative errno on failure. 1759 */ 1760 static int drm_crtc_convert_umode(struct drm_display_mode *out, 1761 const struct drm_mode_modeinfo *in) 1762 { 1763 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) 1764 return -ERANGE; 1765 1766 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1767 return -EINVAL; 1768 1769 out->clock = in->clock; 1770 out->hdisplay = in->hdisplay; 1771 out->hsync_start = in->hsync_start; 1772 out->hsync_end = in->hsync_end; 1773 out->htotal = in->htotal; 1774 out->hskew = in->hskew; 1775 out->vdisplay = in->vdisplay; 1776 out->vsync_start = in->vsync_start; 1777 out->vsync_end = in->vsync_end; 1778 out->vtotal = in->vtotal; 1779 out->vscan = in->vscan; 1780 out->vrefresh = in->vrefresh; 1781 out->flags = in->flags; 1782 out->type = in->type; 1783 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1784 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1785 1786 return 0; 1787 } 1788 1789 /** 1790 * drm_mode_getresources - get graphics configuration 1791 * @dev: drm device for the ioctl 1792 * @data: data pointer for the ioctl 1793 * @file_priv: drm file for the ioctl call 1794 * 1795 * Construct a set of configuration description structures and return 1796 * them to the user, including CRTC, connector and framebuffer configuration. 1797 * 1798 * Called by the user via ioctl. 1799 * 1800 * Returns: 1801 * Zero on success, negative errno on failure. 1802 */ 1803 int drm_mode_getresources(struct drm_device *dev, void *data, 1804 struct drm_file *file_priv) 1805 { 1806 struct drm_mode_card_res *card_res = data; 1807 struct list_head *lh; 1808 struct drm_framebuffer *fb; 1809 struct drm_connector *connector; 1810 struct drm_crtc *crtc; 1811 struct drm_encoder *encoder; 1812 int ret = 0; 1813 int connector_count = 0; 1814 int crtc_count = 0; 1815 int fb_count = 0; 1816 int encoder_count = 0; 1817 int copied = 0, i; 1818 uint32_t __user *fb_id; 1819 uint32_t __user *crtc_id; 1820 uint32_t __user *connector_id; 1821 uint32_t __user *encoder_id; 1822 struct drm_mode_group *mode_group; 1823 1824 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1825 return -EINVAL; 1826 1827 1828 mutex_lock(&file_priv->fbs_lock); 1829 /* 1830 * For the non-control nodes we need to limit the list of resources 1831 * by IDs in the group list for this node 1832 */ 1833 list_for_each(lh, &file_priv->fbs) 1834 fb_count++; 1835 1836 /* handle this in 4 parts */ 1837 /* FBs */ 1838 if (card_res->count_fbs >= fb_count) { 1839 copied = 0; 1840 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1841 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1842 if (put_user(fb->base.id, fb_id + copied)) { 1843 mutex_unlock(&file_priv->fbs_lock); 1844 return -EFAULT; 1845 } 1846 copied++; 1847 } 1848 } 1849 card_res->count_fbs = fb_count; 1850 mutex_unlock(&file_priv->fbs_lock); 1851 1852 /* mode_config.mutex protects the connector list against e.g. DP MST 1853 * connector hot-adding. CRTC/Plane lists are invariant. */ 1854 mutex_lock(&dev->mode_config.mutex); 1855 if (!drm_is_primary_client(file_priv)) { 1856 1857 mode_group = NULL; 1858 list_for_each(lh, &dev->mode_config.crtc_list) 1859 crtc_count++; 1860 1861 list_for_each(lh, &dev->mode_config.connector_list) 1862 connector_count++; 1863 1864 list_for_each(lh, &dev->mode_config.encoder_list) 1865 encoder_count++; 1866 } else { 1867 1868 mode_group = &file_priv->master->minor->mode_group; 1869 crtc_count = mode_group->num_crtcs; 1870 connector_count = mode_group->num_connectors; 1871 encoder_count = mode_group->num_encoders; 1872 } 1873 1874 card_res->max_height = dev->mode_config.max_height; 1875 card_res->min_height = dev->mode_config.min_height; 1876 card_res->max_width = dev->mode_config.max_width; 1877 card_res->min_width = dev->mode_config.min_width; 1878 1879 /* CRTCs */ 1880 if (card_res->count_crtcs >= crtc_count) { 1881 copied = 0; 1882 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1883 if (!mode_group) { 1884 list_for_each_entry(crtc, &dev->mode_config.crtc_list, 1885 head) { 1886 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 1887 if (put_user(crtc->base.id, crtc_id + copied)) { 1888 ret = -EFAULT; 1889 goto out; 1890 } 1891 copied++; 1892 } 1893 } else { 1894 for (i = 0; i < mode_group->num_crtcs; i++) { 1895 if (put_user(mode_group->id_list[i], 1896 crtc_id + copied)) { 1897 ret = -EFAULT; 1898 goto out; 1899 } 1900 copied++; 1901 } 1902 } 1903 } 1904 card_res->count_crtcs = crtc_count; 1905 1906 /* Encoders */ 1907 if (card_res->count_encoders >= encoder_count) { 1908 copied = 0; 1909 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1910 if (!mode_group) { 1911 list_for_each_entry(encoder, 1912 &dev->mode_config.encoder_list, 1913 head) { 1914 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1915 encoder->name); 1916 if (put_user(encoder->base.id, encoder_id + 1917 copied)) { 1918 ret = -EFAULT; 1919 goto out; 1920 } 1921 copied++; 1922 } 1923 } else { 1924 for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) { 1925 if (put_user(mode_group->id_list[i], 1926 encoder_id + copied)) { 1927 ret = -EFAULT; 1928 goto out; 1929 } 1930 copied++; 1931 } 1932 1933 } 1934 } 1935 card_res->count_encoders = encoder_count; 1936 1937 /* Connectors */ 1938 if (card_res->count_connectors >= connector_count) { 1939 copied = 0; 1940 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1941 if (!mode_group) { 1942 list_for_each_entry(connector, 1943 &dev->mode_config.connector_list, 1944 head) { 1945 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1946 connector->base.id, 1947 connector->name); 1948 if (put_user(connector->base.id, 1949 connector_id + copied)) { 1950 ret = -EFAULT; 1951 goto out; 1952 } 1953 copied++; 1954 } 1955 } else { 1956 int start = mode_group->num_crtcs + 1957 mode_group->num_encoders; 1958 for (i = start; i < start + mode_group->num_connectors; i++) { 1959 if (put_user(mode_group->id_list[i], 1960 connector_id + copied)) { 1961 ret = -EFAULT; 1962 goto out; 1963 } 1964 copied++; 1965 } 1966 } 1967 } 1968 card_res->count_connectors = connector_count; 1969 1970 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1971 card_res->count_connectors, card_res->count_encoders); 1972 1973 out: 1974 mutex_unlock(&dev->mode_config.mutex); 1975 return ret; 1976 } 1977 1978 /** 1979 * drm_mode_getcrtc - get CRTC configuration 1980 * @dev: drm device for the ioctl 1981 * @data: data pointer for the ioctl 1982 * @file_priv: drm file for the ioctl call 1983 * 1984 * Construct a CRTC configuration structure to return to the user. 1985 * 1986 * Called by the user via ioctl. 1987 * 1988 * Returns: 1989 * Zero on success, negative errno on failure. 1990 */ 1991 int drm_mode_getcrtc(struct drm_device *dev, 1992 void *data, struct drm_file *file_priv) 1993 { 1994 struct drm_mode_crtc *crtc_resp = data; 1995 struct drm_crtc *crtc; 1996 1997 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1998 return -EINVAL; 1999 2000 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 2001 if (!crtc) 2002 return -ENOENT; 2003 2004 drm_modeset_lock_crtc(crtc, crtc->primary); 2005 crtc_resp->gamma_size = crtc->gamma_size; 2006 if (crtc->primary->fb) 2007 crtc_resp->fb_id = crtc->primary->fb->base.id; 2008 else 2009 crtc_resp->fb_id = 0; 2010 2011 if (crtc->state) { 2012 crtc_resp->x = crtc->primary->state->src_x >> 16; 2013 crtc_resp->y = crtc->primary->state->src_y >> 16; 2014 if (crtc->state->enable) { 2015 drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); 2016 crtc_resp->mode_valid = 1; 2017 2018 } else { 2019 crtc_resp->mode_valid = 0; 2020 } 2021 } else { 2022 crtc_resp->x = crtc->x; 2023 crtc_resp->y = crtc->y; 2024 if (crtc->enabled) { 2025 drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->mode); 2026 crtc_resp->mode_valid = 1; 2027 2028 } else { 2029 crtc_resp->mode_valid = 0; 2030 } 2031 } 2032 drm_modeset_unlock_crtc(crtc); 2033 2034 return 0; 2035 } 2036 2037 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 2038 const struct drm_file *file_priv) 2039 { 2040 /* 2041 * If user-space hasn't configured the driver to expose the stereo 3D 2042 * modes, don't expose them. 2043 */ 2044 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 2045 return false; 2046 2047 return true; 2048 } 2049 2050 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 2051 { 2052 /* For atomic drivers only state objects are synchronously updated and 2053 * protected by modeset locks, so check those first. */ 2054 if (connector->state) 2055 return connector->state->best_encoder; 2056 return connector->encoder; 2057 } 2058 2059 /* helper for getconnector and getproperties ioctls */ 2060 static int get_properties(struct drm_mode_object *obj, bool atomic, 2061 uint32_t __user *prop_ptr, uint64_t __user *prop_values, 2062 uint32_t *arg_count_props) 2063 { 2064 int props_count; 2065 int i, ret, copied; 2066 2067 props_count = obj->properties->count; 2068 if (!atomic) 2069 props_count -= obj->properties->atomic_count; 2070 2071 if ((*arg_count_props >= props_count) && props_count) { 2072 for (i = 0, copied = 0; copied < props_count; i++) { 2073 struct drm_property *prop = obj->properties->properties[i]; 2074 uint64_t val; 2075 2076 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) 2077 continue; 2078 2079 ret = drm_object_property_get_value(obj, prop, &val); 2080 if (ret) 2081 return ret; 2082 2083 if (put_user(prop->base.id, prop_ptr + copied)) 2084 return -EFAULT; 2085 2086 if (put_user(val, prop_values + copied)) 2087 return -EFAULT; 2088 2089 copied++; 2090 } 2091 } 2092 *arg_count_props = props_count; 2093 2094 return 0; 2095 } 2096 2097 /** 2098 * drm_mode_getconnector - get connector configuration 2099 * @dev: drm device for the ioctl 2100 * @data: data pointer for the ioctl 2101 * @file_priv: drm file for the ioctl call 2102 * 2103 * Construct a connector configuration structure to return to the user. 2104 * 2105 * Called by the user via ioctl. 2106 * 2107 * Returns: 2108 * Zero on success, negative errno on failure. 2109 */ 2110 int drm_mode_getconnector(struct drm_device *dev, void *data, 2111 struct drm_file *file_priv) 2112 { 2113 struct drm_mode_get_connector *out_resp = data; 2114 struct drm_connector *connector; 2115 struct drm_encoder *encoder; 2116 struct drm_display_mode *mode; 2117 int mode_count = 0; 2118 int encoders_count = 0; 2119 int ret = 0; 2120 int copied = 0; 2121 int i; 2122 struct drm_mode_modeinfo u_mode; 2123 struct drm_mode_modeinfo __user *mode_ptr; 2124 uint32_t __user *encoder_ptr; 2125 2126 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2127 return -EINVAL; 2128 2129 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2130 2131 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 2132 2133 mutex_lock(&dev->mode_config.mutex); 2134 2135 connector = drm_connector_find(dev, out_resp->connector_id); 2136 if (!connector) { 2137 ret = -ENOENT; 2138 goto out_unlock; 2139 } 2140 2141 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) 2142 if (connector->encoder_ids[i] != 0) 2143 encoders_count++; 2144 2145 if (out_resp->count_modes == 0) { 2146 connector->funcs->fill_modes(connector, 2147 dev->mode_config.max_width, 2148 dev->mode_config.max_height); 2149 } 2150 2151 /* delayed so we get modes regardless of pre-fill_modes state */ 2152 list_for_each_entry(mode, &connector->modes, head) 2153 if (drm_mode_expose_to_userspace(mode, file_priv)) 2154 mode_count++; 2155 2156 out_resp->connector_id = connector->base.id; 2157 out_resp->connector_type = connector->connector_type; 2158 out_resp->connector_type_id = connector->connector_type_id; 2159 out_resp->mm_width = connector->display_info.width_mm; 2160 out_resp->mm_height = connector->display_info.height_mm; 2161 out_resp->subpixel = connector->display_info.subpixel_order; 2162 out_resp->connection = connector->status; 2163 2164 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2165 encoder = drm_connector_get_encoder(connector); 2166 if (encoder) 2167 out_resp->encoder_id = encoder->base.id; 2168 else 2169 out_resp->encoder_id = 0; 2170 2171 /* 2172 * This ioctl is called twice, once to determine how much space is 2173 * needed, and the 2nd time to fill it. 2174 */ 2175 if ((out_resp->count_modes >= mode_count) && mode_count) { 2176 copied = 0; 2177 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2178 list_for_each_entry(mode, &connector->modes, head) { 2179 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2180 continue; 2181 2182 drm_crtc_convert_to_umode(&u_mode, mode); 2183 if (copy_to_user(mode_ptr + copied, 2184 &u_mode, sizeof(u_mode))) { 2185 ret = -EFAULT; 2186 goto out; 2187 } 2188 copied++; 2189 } 2190 } 2191 out_resp->count_modes = mode_count; 2192 2193 ret = get_properties(&connector->base, file_priv->atomic, 2194 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2195 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2196 &out_resp->count_props); 2197 if (ret) 2198 goto out; 2199 2200 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2201 copied = 0; 2202 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2203 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2204 if (connector->encoder_ids[i] != 0) { 2205 if (put_user(connector->encoder_ids[i], 2206 encoder_ptr + copied)) { 2207 ret = -EFAULT; 2208 goto out; 2209 } 2210 copied++; 2211 } 2212 } 2213 } 2214 out_resp->count_encoders = encoders_count; 2215 2216 out: 2217 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2218 2219 out_unlock: 2220 mutex_unlock(&dev->mode_config.mutex); 2221 2222 return ret; 2223 } 2224 2225 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2226 { 2227 struct drm_connector *connector; 2228 struct drm_device *dev = encoder->dev; 2229 bool uses_atomic = false; 2230 2231 /* For atomic drivers only state objects are synchronously updated and 2232 * protected by modeset locks, so check those first. */ 2233 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 2234 if (!connector->state) 2235 continue; 2236 2237 uses_atomic = true; 2238 2239 if (connector->state->best_encoder != encoder) 2240 continue; 2241 2242 return connector->state->crtc; 2243 } 2244 2245 /* Don't return stale data (e.g. pending async disable). */ 2246 if (uses_atomic) 2247 return NULL; 2248 2249 return encoder->crtc; 2250 } 2251 2252 /** 2253 * drm_mode_getencoder - get encoder configuration 2254 * @dev: drm device for the ioctl 2255 * @data: data pointer for the ioctl 2256 * @file_priv: drm file for the ioctl call 2257 * 2258 * Construct a encoder configuration structure to return to the user. 2259 * 2260 * Called by the user via ioctl. 2261 * 2262 * Returns: 2263 * Zero on success, negative errno on failure. 2264 */ 2265 int drm_mode_getencoder(struct drm_device *dev, void *data, 2266 struct drm_file *file_priv) 2267 { 2268 struct drm_mode_get_encoder *enc_resp = data; 2269 struct drm_encoder *encoder; 2270 struct drm_crtc *crtc; 2271 2272 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2273 return -EINVAL; 2274 2275 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2276 if (!encoder) 2277 return -ENOENT; 2278 2279 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2280 crtc = drm_encoder_get_crtc(encoder); 2281 if (crtc) 2282 enc_resp->crtc_id = crtc->base.id; 2283 else 2284 enc_resp->crtc_id = 0; 2285 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2286 2287 enc_resp->encoder_type = encoder->encoder_type; 2288 enc_resp->encoder_id = encoder->base.id; 2289 enc_resp->possible_crtcs = encoder->possible_crtcs; 2290 enc_resp->possible_clones = encoder->possible_clones; 2291 2292 return 0; 2293 } 2294 2295 /** 2296 * drm_mode_getplane_res - enumerate all plane resources 2297 * @dev: DRM device 2298 * @data: ioctl data 2299 * @file_priv: DRM file info 2300 * 2301 * Construct a list of plane ids to return to the user. 2302 * 2303 * Called by the user via ioctl. 2304 * 2305 * Returns: 2306 * Zero on success, negative errno on failure. 2307 */ 2308 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2309 struct drm_file *file_priv) 2310 { 2311 struct drm_mode_get_plane_res *plane_resp = data; 2312 struct drm_mode_config *config; 2313 struct drm_plane *plane; 2314 uint32_t __user *plane_ptr; 2315 int copied = 0; 2316 unsigned num_planes; 2317 2318 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2319 return -EINVAL; 2320 2321 config = &dev->mode_config; 2322 2323 if (file_priv->universal_planes) 2324 num_planes = config->num_total_plane; 2325 else 2326 num_planes = config->num_overlay_plane; 2327 2328 /* 2329 * This ioctl is called twice, once to determine how much space is 2330 * needed, and the 2nd time to fill it. 2331 */ 2332 if (num_planes && 2333 (plane_resp->count_planes >= num_planes)) { 2334 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2335 2336 /* Plane lists are invariant, no locking needed. */ 2337 list_for_each_entry(plane, &config->plane_list, head) { 2338 /* 2339 * Unless userspace set the 'universal planes' 2340 * capability bit, only advertise overlays. 2341 */ 2342 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2343 !file_priv->universal_planes) 2344 continue; 2345 2346 if (put_user(plane->base.id, plane_ptr + copied)) 2347 return -EFAULT; 2348 copied++; 2349 } 2350 } 2351 plane_resp->count_planes = num_planes; 2352 2353 return 0; 2354 } 2355 2356 /** 2357 * drm_mode_getplane - get plane configuration 2358 * @dev: DRM device 2359 * @data: ioctl data 2360 * @file_priv: DRM file info 2361 * 2362 * Construct a plane configuration structure to return to the user. 2363 * 2364 * Called by the user via ioctl. 2365 * 2366 * Returns: 2367 * Zero on success, negative errno on failure. 2368 */ 2369 int drm_mode_getplane(struct drm_device *dev, void *data, 2370 struct drm_file *file_priv) 2371 { 2372 struct drm_mode_get_plane *plane_resp = data; 2373 struct drm_plane *plane; 2374 uint32_t __user *format_ptr; 2375 2376 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2377 return -EINVAL; 2378 2379 plane = drm_plane_find(dev, plane_resp->plane_id); 2380 if (!plane) 2381 return -ENOENT; 2382 2383 drm_modeset_lock(&plane->mutex, NULL); 2384 if (plane->crtc) 2385 plane_resp->crtc_id = plane->crtc->base.id; 2386 else 2387 plane_resp->crtc_id = 0; 2388 2389 if (plane->fb) 2390 plane_resp->fb_id = plane->fb->base.id; 2391 else 2392 plane_resp->fb_id = 0; 2393 drm_modeset_unlock(&plane->mutex); 2394 2395 plane_resp->plane_id = plane->base.id; 2396 plane_resp->possible_crtcs = plane->possible_crtcs; 2397 plane_resp->gamma_size = 0; 2398 2399 /* 2400 * This ioctl is called twice, once to determine how much space is 2401 * needed, and the 2nd time to fill it. 2402 */ 2403 if (plane->format_count && 2404 (plane_resp->count_format_types >= plane->format_count)) { 2405 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2406 if (copy_to_user(format_ptr, 2407 plane->format_types, 2408 sizeof(uint32_t) * plane->format_count)) { 2409 return -EFAULT; 2410 } 2411 } 2412 plane_resp->count_format_types = plane->format_count; 2413 2414 return 0; 2415 } 2416 2417 /** 2418 * drm_plane_check_pixel_format - Check if the plane supports the pixel format 2419 * @plane: plane to check for format support 2420 * @format: the pixel format 2421 * 2422 * Returns: 2423 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL 2424 * otherwise. 2425 */ 2426 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format) 2427 { 2428 unsigned int i; 2429 2430 for (i = 0; i < plane->format_count; i++) { 2431 if (format == plane->format_types[i]) 2432 return 0; 2433 } 2434 2435 return -EINVAL; 2436 } 2437 2438 /* 2439 * setplane_internal - setplane handler for internal callers 2440 * 2441 * Note that we assume an extra reference has already been taken on fb. If the 2442 * update fails, this reference will be dropped before return; if it succeeds, 2443 * the previous framebuffer (if any) will be unreferenced instead. 2444 * 2445 * src_{x,y,w,h} are provided in 16.16 fixed point format 2446 */ 2447 static int __setplane_internal(struct drm_plane *plane, 2448 struct drm_crtc *crtc, 2449 struct drm_framebuffer *fb, 2450 int32_t crtc_x, int32_t crtc_y, 2451 uint32_t crtc_w, uint32_t crtc_h, 2452 /* src_{x,y,w,h} values are 16.16 fixed point */ 2453 uint32_t src_x, uint32_t src_y, 2454 uint32_t src_w, uint32_t src_h) 2455 { 2456 int ret = 0; 2457 unsigned int fb_width, fb_height; 2458 2459 /* No fb means shut it down */ 2460 if (!fb) { 2461 plane->old_fb = plane->fb; 2462 ret = plane->funcs->disable_plane(plane); 2463 if (!ret) { 2464 plane->crtc = NULL; 2465 plane->fb = NULL; 2466 } else { 2467 plane->old_fb = NULL; 2468 } 2469 goto out; 2470 } 2471 2472 /* Check whether this plane is usable on this CRTC */ 2473 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2474 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2475 ret = -EINVAL; 2476 goto out; 2477 } 2478 2479 /* Check whether this plane supports the fb pixel format. */ 2480 ret = drm_plane_check_pixel_format(plane, fb->pixel_format); 2481 if (ret) { 2482 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2483 drm_get_format_name(fb->pixel_format)); 2484 goto out; 2485 } 2486 2487 /* Give drivers some help against integer overflows */ 2488 if (crtc_w > INT_MAX || 2489 crtc_x > INT_MAX - (int32_t) crtc_w || 2490 crtc_h > INT_MAX || 2491 crtc_y > INT_MAX - (int32_t) crtc_h) { 2492 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2493 crtc_w, crtc_h, crtc_x, crtc_y); 2494 return -ERANGE; 2495 } 2496 2497 2498 fb_width = fb->width << 16; 2499 fb_height = fb->height << 16; 2500 2501 /* Make sure source coordinates are inside the fb. */ 2502 if (src_w > fb_width || 2503 src_x > fb_width - src_w || 2504 src_h > fb_height || 2505 src_y > fb_height - src_h) { 2506 DRM_DEBUG_KMS("Invalid source coordinates " 2507 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2508 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2509 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2510 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2511 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2512 ret = -ENOSPC; 2513 goto out; 2514 } 2515 2516 plane->old_fb = plane->fb; 2517 ret = plane->funcs->update_plane(plane, crtc, fb, 2518 crtc_x, crtc_y, crtc_w, crtc_h, 2519 src_x, src_y, src_w, src_h); 2520 if (!ret) { 2521 plane->crtc = crtc; 2522 plane->fb = fb; 2523 fb = NULL; 2524 } else { 2525 plane->old_fb = NULL; 2526 } 2527 2528 out: 2529 if (fb) 2530 drm_framebuffer_unreference(fb); 2531 if (plane->old_fb) 2532 drm_framebuffer_unreference(plane->old_fb); 2533 plane->old_fb = NULL; 2534 2535 return ret; 2536 } 2537 2538 static int setplane_internal(struct drm_plane *plane, 2539 struct drm_crtc *crtc, 2540 struct drm_framebuffer *fb, 2541 int32_t crtc_x, int32_t crtc_y, 2542 uint32_t crtc_w, uint32_t crtc_h, 2543 /* src_{x,y,w,h} values are 16.16 fixed point */ 2544 uint32_t src_x, uint32_t src_y, 2545 uint32_t src_w, uint32_t src_h) 2546 { 2547 int ret; 2548 2549 drm_modeset_lock_all(plane->dev); 2550 ret = __setplane_internal(plane, crtc, fb, 2551 crtc_x, crtc_y, crtc_w, crtc_h, 2552 src_x, src_y, src_w, src_h); 2553 drm_modeset_unlock_all(plane->dev); 2554 2555 return ret; 2556 } 2557 2558 /** 2559 * drm_mode_setplane - configure a plane's configuration 2560 * @dev: DRM device 2561 * @data: ioctl data* 2562 * @file_priv: DRM file info 2563 * 2564 * Set plane configuration, including placement, fb, scaling, and other factors. 2565 * Or pass a NULL fb to disable (planes may be disabled without providing a 2566 * valid crtc). 2567 * 2568 * Returns: 2569 * Zero on success, negative errno on failure. 2570 */ 2571 int drm_mode_setplane(struct drm_device *dev, void *data, 2572 struct drm_file *file_priv) 2573 { 2574 struct drm_mode_set_plane *plane_req = data; 2575 struct drm_plane *plane; 2576 struct drm_crtc *crtc = NULL; 2577 struct drm_framebuffer *fb = NULL; 2578 2579 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2580 return -EINVAL; 2581 2582 /* 2583 * First, find the plane, crtc, and fb objects. If not available, 2584 * we don't bother to call the driver. 2585 */ 2586 plane = drm_plane_find(dev, plane_req->plane_id); 2587 if (!plane) { 2588 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2589 plane_req->plane_id); 2590 return -ENOENT; 2591 } 2592 2593 if (plane_req->fb_id) { 2594 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2595 if (!fb) { 2596 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2597 plane_req->fb_id); 2598 return -ENOENT; 2599 } 2600 2601 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2602 if (!crtc) { 2603 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2604 plane_req->crtc_id); 2605 return -ENOENT; 2606 } 2607 } 2608 2609 /* 2610 * setplane_internal will take care of deref'ing either the old or new 2611 * framebuffer depending on success. 2612 */ 2613 return setplane_internal(plane, crtc, fb, 2614 plane_req->crtc_x, plane_req->crtc_y, 2615 plane_req->crtc_w, plane_req->crtc_h, 2616 plane_req->src_x, plane_req->src_y, 2617 plane_req->src_w, plane_req->src_h); 2618 } 2619 2620 /** 2621 * drm_mode_set_config_internal - helper to call ->set_config 2622 * @set: modeset config to set 2623 * 2624 * This is a little helper to wrap internal calls to the ->set_config driver 2625 * interface. The only thing it adds is correct refcounting dance. 2626 * 2627 * Returns: 2628 * Zero on success, negative errno on failure. 2629 */ 2630 int drm_mode_set_config_internal(struct drm_mode_set *set) 2631 { 2632 struct drm_crtc *crtc = set->crtc; 2633 struct drm_framebuffer *fb; 2634 struct drm_crtc *tmp; 2635 int ret; 2636 2637 /* 2638 * NOTE: ->set_config can also disable other crtcs (if we steal all 2639 * connectors from it), hence we need to refcount the fbs across all 2640 * crtcs. Atomic modeset will have saner semantics ... 2641 */ 2642 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) 2643 tmp->primary->old_fb = tmp->primary->fb; 2644 2645 fb = set->fb; 2646 2647 ret = crtc->funcs->set_config(set); 2648 if (ret == 0) { 2649 crtc->primary->crtc = crtc; 2650 crtc->primary->fb = fb; 2651 } 2652 2653 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { 2654 if (tmp->primary->fb) 2655 drm_framebuffer_reference(tmp->primary->fb); 2656 if (tmp->primary->old_fb) 2657 drm_framebuffer_unreference(tmp->primary->old_fb); 2658 tmp->primary->old_fb = NULL; 2659 } 2660 2661 return ret; 2662 } 2663 EXPORT_SYMBOL(drm_mode_set_config_internal); 2664 2665 /** 2666 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode 2667 * @mode: mode to query 2668 * @hdisplay: hdisplay value to fill in 2669 * @vdisplay: vdisplay value to fill in 2670 * 2671 * The vdisplay value will be doubled if the specified mode is a stereo mode of 2672 * the appropriate layout. 2673 */ 2674 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, 2675 int *hdisplay, int *vdisplay) 2676 { 2677 struct drm_display_mode adjusted; 2678 2679 drm_mode_copy(&adjusted, mode); 2680 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 2681 *hdisplay = adjusted.crtc_hdisplay; 2682 *vdisplay = adjusted.crtc_vdisplay; 2683 } 2684 EXPORT_SYMBOL(drm_crtc_get_hv_timing); 2685 2686 /** 2687 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2688 * CRTC viewport 2689 * @crtc: CRTC that framebuffer will be displayed on 2690 * @x: x panning 2691 * @y: y panning 2692 * @mode: mode that framebuffer will be displayed under 2693 * @fb: framebuffer to check size of 2694 */ 2695 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2696 int x, int y, 2697 const struct drm_display_mode *mode, 2698 const struct drm_framebuffer *fb) 2699 2700 { 2701 int hdisplay, vdisplay; 2702 2703 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); 2704 2705 if (crtc->invert_dimensions) 2706 swap(hdisplay, vdisplay); 2707 2708 if (hdisplay > fb->width || 2709 vdisplay > fb->height || 2710 x > fb->width - hdisplay || 2711 y > fb->height - vdisplay) { 2712 DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n", 2713 fb->width, fb->height, hdisplay, vdisplay, x, y, 2714 crtc->invert_dimensions ? " (inverted)" : ""); 2715 return -ENOSPC; 2716 } 2717 2718 return 0; 2719 } 2720 EXPORT_SYMBOL(drm_crtc_check_viewport); 2721 2722 /** 2723 * drm_mode_setcrtc - set CRTC configuration 2724 * @dev: drm device for the ioctl 2725 * @data: data pointer for the ioctl 2726 * @file_priv: drm file for the ioctl call 2727 * 2728 * Build a new CRTC configuration based on user request. 2729 * 2730 * Called by the user via ioctl. 2731 * 2732 * Returns: 2733 * Zero on success, negative errno on failure. 2734 */ 2735 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2736 struct drm_file *file_priv) 2737 { 2738 struct drm_mode_config *config = &dev->mode_config; 2739 struct drm_mode_crtc *crtc_req = data; 2740 struct drm_crtc *crtc; 2741 struct drm_connector **connector_set = NULL, *connector; 2742 struct drm_framebuffer *fb = NULL; 2743 struct drm_display_mode *mode = NULL; 2744 struct drm_mode_set set; 2745 uint32_t __user *set_connectors_ptr; 2746 int ret; 2747 int i; 2748 2749 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2750 return -EINVAL; 2751 2752 /* For some reason crtc x/y offsets are signed internally. */ 2753 if (crtc_req->x > INT_MAX || crtc_req->y > INT_MAX) 2754 return -ERANGE; 2755 2756 drm_modeset_lock_all(dev); 2757 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2758 if (!crtc) { 2759 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2760 ret = -ENOENT; 2761 goto out; 2762 } 2763 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 2764 2765 if (crtc_req->mode_valid) { 2766 /* If we have a mode we need a framebuffer. */ 2767 /* If we pass -1, set the mode with the currently bound fb */ 2768 if (crtc_req->fb_id == -1) { 2769 if (!crtc->primary->fb) { 2770 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2771 ret = -EINVAL; 2772 goto out; 2773 } 2774 fb = crtc->primary->fb; 2775 /* Make refcounting symmetric with the lookup path. */ 2776 drm_framebuffer_reference(fb); 2777 } else { 2778 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2779 if (!fb) { 2780 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2781 crtc_req->fb_id); 2782 ret = -ENOENT; 2783 goto out; 2784 } 2785 } 2786 2787 mode = drm_mode_create(dev); 2788 if (!mode) { 2789 ret = -ENOMEM; 2790 goto out; 2791 } 2792 2793 ret = drm_crtc_convert_umode(mode, &crtc_req->mode); 2794 if (ret) { 2795 DRM_DEBUG_KMS("Invalid mode\n"); 2796 goto out; 2797 } 2798 2799 mode->status = drm_mode_validate_basic(mode); 2800 if (mode->status != MODE_OK) { 2801 ret = -EINVAL; 2802 goto out; 2803 } 2804 2805 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 2806 2807 /* 2808 * Check whether the primary plane supports the fb pixel format. 2809 * Drivers not implementing the universal planes API use a 2810 * default formats list provided by the DRM core which doesn't 2811 * match real hardware capabilities. Skip the check in that 2812 * case. 2813 */ 2814 if (!crtc->primary->format_default) { 2815 ret = drm_plane_check_pixel_format(crtc->primary, 2816 fb->pixel_format); 2817 if (ret) { 2818 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2819 drm_get_format_name(fb->pixel_format)); 2820 goto out; 2821 } 2822 } 2823 2824 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2825 mode, fb); 2826 if (ret) 2827 goto out; 2828 2829 } 2830 2831 if (crtc_req->count_connectors == 0 && mode) { 2832 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2833 ret = -EINVAL; 2834 goto out; 2835 } 2836 2837 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2838 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2839 crtc_req->count_connectors); 2840 ret = -EINVAL; 2841 goto out; 2842 } 2843 2844 if (crtc_req->count_connectors > 0) { 2845 u32 out_id; 2846 2847 /* Avoid unbounded kernel memory allocation */ 2848 if (crtc_req->count_connectors > config->num_connector) { 2849 ret = -EINVAL; 2850 goto out; 2851 } 2852 2853 connector_set = kmalloc_array(crtc_req->count_connectors, 2854 sizeof(struct drm_connector *), 2855 GFP_KERNEL); 2856 if (!connector_set) { 2857 ret = -ENOMEM; 2858 goto out; 2859 } 2860 2861 for (i = 0; i < crtc_req->count_connectors; i++) { 2862 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2863 if (get_user(out_id, &set_connectors_ptr[i])) { 2864 ret = -EFAULT; 2865 goto out; 2866 } 2867 2868 connector = drm_connector_find(dev, out_id); 2869 if (!connector) { 2870 DRM_DEBUG_KMS("Connector id %d unknown\n", 2871 out_id); 2872 ret = -ENOENT; 2873 goto out; 2874 } 2875 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2876 connector->base.id, 2877 connector->name); 2878 2879 connector_set[i] = connector; 2880 } 2881 } 2882 2883 set.crtc = crtc; 2884 set.x = crtc_req->x; 2885 set.y = crtc_req->y; 2886 set.mode = mode; 2887 set.connectors = connector_set; 2888 set.num_connectors = crtc_req->count_connectors; 2889 set.fb = fb; 2890 ret = drm_mode_set_config_internal(&set); 2891 2892 out: 2893 if (fb) 2894 drm_framebuffer_unreference(fb); 2895 2896 kfree(connector_set); 2897 drm_mode_destroy(dev, mode); 2898 drm_modeset_unlock_all(dev); 2899 return ret; 2900 } 2901 2902 /** 2903 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2904 * universal plane handler call 2905 * @crtc: crtc to update cursor for 2906 * @req: data pointer for the ioctl 2907 * @file_priv: drm file for the ioctl call 2908 * 2909 * Legacy cursor ioctl's work directly with driver buffer handles. To 2910 * translate legacy ioctl calls into universal plane handler calls, we need to 2911 * wrap the native buffer handle in a drm_framebuffer. 2912 * 2913 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2914 * buffer with a pitch of 4*width; the universal plane interface should be used 2915 * directly in cases where the hardware can support other buffer settings and 2916 * userspace wants to make use of these capabilities. 2917 * 2918 * Returns: 2919 * Zero on success, negative errno on failure. 2920 */ 2921 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2922 struct drm_mode_cursor2 *req, 2923 struct drm_file *file_priv) 2924 { 2925 struct drm_device *dev = crtc->dev; 2926 struct drm_framebuffer *fb = NULL; 2927 struct drm_mode_fb_cmd2 fbreq = { 2928 .width = req->width, 2929 .height = req->height, 2930 .pixel_format = DRM_FORMAT_ARGB8888, 2931 .pitches = { req->width * 4 }, 2932 .handles = { req->handle }, 2933 }; 2934 int32_t crtc_x, crtc_y; 2935 uint32_t crtc_w = 0, crtc_h = 0; 2936 uint32_t src_w = 0, src_h = 0; 2937 int ret = 0; 2938 2939 BUG_ON(!crtc->cursor); 2940 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2941 2942 /* 2943 * Obtain fb we'll be using (either new or existing) and take an extra 2944 * reference to it if fb != null. setplane will take care of dropping 2945 * the reference if the plane update fails. 2946 */ 2947 if (req->flags & DRM_MODE_CURSOR_BO) { 2948 if (req->handle) { 2949 fb = internal_framebuffer_create(dev, &fbreq, file_priv); 2950 if (IS_ERR(fb)) { 2951 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2952 return PTR_ERR(fb); 2953 } 2954 } else { 2955 fb = NULL; 2956 } 2957 } else { 2958 fb = crtc->cursor->fb; 2959 if (fb) 2960 drm_framebuffer_reference(fb); 2961 } 2962 2963 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2964 crtc_x = req->x; 2965 crtc_y = req->y; 2966 } else { 2967 crtc_x = crtc->cursor_x; 2968 crtc_y = crtc->cursor_y; 2969 } 2970 2971 if (fb) { 2972 crtc_w = fb->width; 2973 crtc_h = fb->height; 2974 src_w = fb->width << 16; 2975 src_h = fb->height << 16; 2976 } 2977 2978 /* 2979 * setplane_internal will take care of deref'ing either the old or new 2980 * framebuffer depending on success. 2981 */ 2982 ret = __setplane_internal(crtc->cursor, crtc, fb, 2983 crtc_x, crtc_y, crtc_w, crtc_h, 2984 0, 0, src_w, src_h); 2985 2986 /* Update successful; save new cursor position, if necessary */ 2987 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2988 crtc->cursor_x = req->x; 2989 crtc->cursor_y = req->y; 2990 } 2991 2992 return ret; 2993 } 2994 2995 static int drm_mode_cursor_common(struct drm_device *dev, 2996 struct drm_mode_cursor2 *req, 2997 struct drm_file *file_priv) 2998 { 2999 struct drm_crtc *crtc; 3000 int ret = 0; 3001 3002 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3003 return -EINVAL; 3004 3005 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 3006 return -EINVAL; 3007 3008 crtc = drm_crtc_find(dev, req->crtc_id); 3009 if (!crtc) { 3010 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 3011 return -ENOENT; 3012 } 3013 3014 /* 3015 * If this crtc has a universal cursor plane, call that plane's update 3016 * handler rather than using legacy cursor handlers. 3017 */ 3018 drm_modeset_lock_crtc(crtc, crtc->cursor); 3019 if (crtc->cursor) { 3020 ret = drm_mode_cursor_universal(crtc, req, file_priv); 3021 goto out; 3022 } 3023 3024 if (req->flags & DRM_MODE_CURSOR_BO) { 3025 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 3026 ret = -ENXIO; 3027 goto out; 3028 } 3029 /* Turns off the cursor if handle is 0 */ 3030 if (crtc->funcs->cursor_set2) 3031 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 3032 req->width, req->height, req->hot_x, req->hot_y); 3033 else 3034 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 3035 req->width, req->height); 3036 } 3037 3038 if (req->flags & DRM_MODE_CURSOR_MOVE) { 3039 if (crtc->funcs->cursor_move) { 3040 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 3041 } else { 3042 ret = -EFAULT; 3043 goto out; 3044 } 3045 } 3046 out: 3047 drm_modeset_unlock_crtc(crtc); 3048 3049 return ret; 3050 3051 } 3052 3053 3054 /** 3055 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 3056 * @dev: drm device for the ioctl 3057 * @data: data pointer for the ioctl 3058 * @file_priv: drm file for the ioctl call 3059 * 3060 * Set the cursor configuration based on user request. 3061 * 3062 * Called by the user via ioctl. 3063 * 3064 * Returns: 3065 * Zero on success, negative errno on failure. 3066 */ 3067 int drm_mode_cursor_ioctl(struct drm_device *dev, 3068 void *data, struct drm_file *file_priv) 3069 { 3070 struct drm_mode_cursor *req = data; 3071 struct drm_mode_cursor2 new_req; 3072 3073 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 3074 new_req.hot_x = new_req.hot_y = 0; 3075 3076 return drm_mode_cursor_common(dev, &new_req, file_priv); 3077 } 3078 3079 /** 3080 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 3081 * @dev: drm device for the ioctl 3082 * @data: data pointer for the ioctl 3083 * @file_priv: drm file for the ioctl call 3084 * 3085 * Set the cursor configuration based on user request. This implements the 2nd 3086 * version of the cursor ioctl, which allows userspace to additionally specify 3087 * the hotspot of the pointer. 3088 * 3089 * Called by the user via ioctl. 3090 * 3091 * Returns: 3092 * Zero on success, negative errno on failure. 3093 */ 3094 int drm_mode_cursor2_ioctl(struct drm_device *dev, 3095 void *data, struct drm_file *file_priv) 3096 { 3097 struct drm_mode_cursor2 *req = data; 3098 3099 return drm_mode_cursor_common(dev, req, file_priv); 3100 } 3101 3102 /** 3103 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 3104 * @bpp: bits per pixels 3105 * @depth: bit depth per pixel 3106 * 3107 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 3108 * Useful in fbdev emulation code, since that deals in those values. 3109 */ 3110 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 3111 { 3112 uint32_t fmt; 3113 3114 switch (bpp) { 3115 case 8: 3116 fmt = DRM_FORMAT_C8; 3117 break; 3118 case 16: 3119 if (depth == 15) 3120 fmt = DRM_FORMAT_XRGB1555; 3121 else 3122 fmt = DRM_FORMAT_RGB565; 3123 break; 3124 case 24: 3125 fmt = DRM_FORMAT_RGB888; 3126 break; 3127 case 32: 3128 if (depth == 24) 3129 fmt = DRM_FORMAT_XRGB8888; 3130 else if (depth == 30) 3131 fmt = DRM_FORMAT_XRGB2101010; 3132 else 3133 fmt = DRM_FORMAT_ARGB8888; 3134 break; 3135 default: 3136 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3137 fmt = DRM_FORMAT_XRGB8888; 3138 break; 3139 } 3140 3141 return fmt; 3142 } 3143 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3144 3145 /** 3146 * drm_mode_addfb - add an FB to the graphics configuration 3147 * @dev: drm device for the ioctl 3148 * @data: data pointer for the ioctl 3149 * @file_priv: drm file for the ioctl call 3150 * 3151 * Add a new FB to the specified CRTC, given a user request. This is the 3152 * original addfb ioctl which only supported RGB formats. 3153 * 3154 * Called by the user via ioctl. 3155 * 3156 * Returns: 3157 * Zero on success, negative errno on failure. 3158 */ 3159 int drm_mode_addfb(struct drm_device *dev, 3160 void *data, struct drm_file *file_priv) 3161 { 3162 struct drm_mode_fb_cmd *or = data; 3163 struct drm_mode_fb_cmd2 r = {}; 3164 int ret; 3165 3166 /* convert to new format and call new ioctl */ 3167 r.fb_id = or->fb_id; 3168 r.width = or->width; 3169 r.height = or->height; 3170 r.pitches[0] = or->pitch; 3171 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3172 r.handles[0] = or->handle; 3173 3174 ret = drm_mode_addfb2(dev, &r, file_priv); 3175 if (ret) 3176 return ret; 3177 3178 or->fb_id = r.fb_id; 3179 3180 return 0; 3181 } 3182 3183 static int format_check(const struct drm_mode_fb_cmd2 *r) 3184 { 3185 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3186 3187 switch (format) { 3188 case DRM_FORMAT_C8: 3189 case DRM_FORMAT_RGB332: 3190 case DRM_FORMAT_BGR233: 3191 case DRM_FORMAT_XRGB4444: 3192 case DRM_FORMAT_XBGR4444: 3193 case DRM_FORMAT_RGBX4444: 3194 case DRM_FORMAT_BGRX4444: 3195 case DRM_FORMAT_ARGB4444: 3196 case DRM_FORMAT_ABGR4444: 3197 case DRM_FORMAT_RGBA4444: 3198 case DRM_FORMAT_BGRA4444: 3199 case DRM_FORMAT_XRGB1555: 3200 case DRM_FORMAT_XBGR1555: 3201 case DRM_FORMAT_RGBX5551: 3202 case DRM_FORMAT_BGRX5551: 3203 case DRM_FORMAT_ARGB1555: 3204 case DRM_FORMAT_ABGR1555: 3205 case DRM_FORMAT_RGBA5551: 3206 case DRM_FORMAT_BGRA5551: 3207 case DRM_FORMAT_RGB565: 3208 case DRM_FORMAT_BGR565: 3209 case DRM_FORMAT_RGB888: 3210 case DRM_FORMAT_BGR888: 3211 case DRM_FORMAT_XRGB8888: 3212 case DRM_FORMAT_XBGR8888: 3213 case DRM_FORMAT_RGBX8888: 3214 case DRM_FORMAT_BGRX8888: 3215 case DRM_FORMAT_ARGB8888: 3216 case DRM_FORMAT_ABGR8888: 3217 case DRM_FORMAT_RGBA8888: 3218 case DRM_FORMAT_BGRA8888: 3219 case DRM_FORMAT_XRGB2101010: 3220 case DRM_FORMAT_XBGR2101010: 3221 case DRM_FORMAT_RGBX1010102: 3222 case DRM_FORMAT_BGRX1010102: 3223 case DRM_FORMAT_ARGB2101010: 3224 case DRM_FORMAT_ABGR2101010: 3225 case DRM_FORMAT_RGBA1010102: 3226 case DRM_FORMAT_BGRA1010102: 3227 case DRM_FORMAT_YUYV: 3228 case DRM_FORMAT_YVYU: 3229 case DRM_FORMAT_UYVY: 3230 case DRM_FORMAT_VYUY: 3231 case DRM_FORMAT_AYUV: 3232 case DRM_FORMAT_NV12: 3233 case DRM_FORMAT_NV21: 3234 case DRM_FORMAT_NV16: 3235 case DRM_FORMAT_NV61: 3236 case DRM_FORMAT_NV24: 3237 case DRM_FORMAT_NV42: 3238 case DRM_FORMAT_YUV410: 3239 case DRM_FORMAT_YVU410: 3240 case DRM_FORMAT_YUV411: 3241 case DRM_FORMAT_YVU411: 3242 case DRM_FORMAT_YUV420: 3243 case DRM_FORMAT_YVU420: 3244 case DRM_FORMAT_YUV422: 3245 case DRM_FORMAT_YVU422: 3246 case DRM_FORMAT_YUV444: 3247 case DRM_FORMAT_YVU444: 3248 return 0; 3249 default: 3250 DRM_DEBUG_KMS("invalid pixel format %s\n", 3251 drm_get_format_name(r->pixel_format)); 3252 return -EINVAL; 3253 } 3254 } 3255 3256 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3257 { 3258 int ret, hsub, vsub, num_planes, i; 3259 3260 ret = format_check(r); 3261 if (ret) { 3262 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3263 drm_get_format_name(r->pixel_format)); 3264 return ret; 3265 } 3266 3267 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3268 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3269 num_planes = drm_format_num_planes(r->pixel_format); 3270 3271 if (r->width == 0 || r->width % hsub) { 3272 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3273 return -EINVAL; 3274 } 3275 3276 if (r->height == 0 || r->height % vsub) { 3277 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3278 return -EINVAL; 3279 } 3280 3281 for (i = 0; i < num_planes; i++) { 3282 unsigned int width = r->width / (i != 0 ? hsub : 1); 3283 unsigned int height = r->height / (i != 0 ? vsub : 1); 3284 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3285 3286 if (!r->handles[i]) { 3287 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3288 return -EINVAL; 3289 } 3290 3291 if ((uint64_t) width * cpp > UINT_MAX) 3292 return -ERANGE; 3293 3294 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3295 return -ERANGE; 3296 3297 if (r->pitches[i] < width * cpp) { 3298 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3299 return -EINVAL; 3300 } 3301 3302 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { 3303 DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n", 3304 r->modifier[i], i); 3305 return -EINVAL; 3306 } 3307 } 3308 3309 return 0; 3310 } 3311 3312 static struct drm_framebuffer * 3313 internal_framebuffer_create(struct drm_device *dev, 3314 struct drm_mode_fb_cmd2 *r, 3315 struct drm_file *file_priv) 3316 { 3317 struct drm_mode_config *config = &dev->mode_config; 3318 struct drm_framebuffer *fb; 3319 int ret; 3320 3321 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { 3322 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3323 return ERR_PTR(-EINVAL); 3324 } 3325 3326 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3327 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3328 r->width, config->min_width, config->max_width); 3329 return ERR_PTR(-EINVAL); 3330 } 3331 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3332 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3333 r->height, config->min_height, config->max_height); 3334 return ERR_PTR(-EINVAL); 3335 } 3336 3337 if (r->flags & DRM_MODE_FB_MODIFIERS && 3338 !dev->mode_config.allow_fb_modifiers) { 3339 DRM_DEBUG_KMS("driver does not support fb modifiers\n"); 3340 return ERR_PTR(-EINVAL); 3341 } 3342 3343 ret = framebuffer_check(r); 3344 if (ret) 3345 return ERR_PTR(ret); 3346 3347 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3348 if (IS_ERR(fb)) { 3349 DRM_DEBUG_KMS("could not create framebuffer\n"); 3350 return fb; 3351 } 3352 3353 return fb; 3354 } 3355 3356 /** 3357 * drm_mode_addfb2 - add an FB to the graphics configuration 3358 * @dev: drm device for the ioctl 3359 * @data: data pointer for the ioctl 3360 * @file_priv: drm file for the ioctl call 3361 * 3362 * Add a new FB to the specified CRTC, given a user request with format. This is 3363 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3364 * and uses fourcc codes as pixel format specifiers. 3365 * 3366 * Called by the user via ioctl. 3367 * 3368 * Returns: 3369 * Zero on success, negative errno on failure. 3370 */ 3371 int drm_mode_addfb2(struct drm_device *dev, 3372 void *data, struct drm_file *file_priv) 3373 { 3374 struct drm_mode_fb_cmd2 *r = data; 3375 struct drm_framebuffer *fb; 3376 3377 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3378 return -EINVAL; 3379 3380 fb = internal_framebuffer_create(dev, r, file_priv); 3381 if (IS_ERR(fb)) 3382 return PTR_ERR(fb); 3383 3384 /* Transfer ownership to the filp for reaping on close */ 3385 3386 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3387 mutex_lock(&file_priv->fbs_lock); 3388 r->fb_id = fb->base.id; 3389 list_add(&fb->filp_head, &file_priv->fbs); 3390 mutex_unlock(&file_priv->fbs_lock); 3391 3392 return 0; 3393 } 3394 3395 /** 3396 * drm_mode_rmfb - remove an FB from the configuration 3397 * @dev: drm device for the ioctl 3398 * @data: data pointer for the ioctl 3399 * @file_priv: drm file for the ioctl call 3400 * 3401 * Remove the FB specified by the user. 3402 * 3403 * Called by the user via ioctl. 3404 * 3405 * Returns: 3406 * Zero on success, negative errno on failure. 3407 */ 3408 int drm_mode_rmfb(struct drm_device *dev, 3409 void *data, struct drm_file *file_priv) 3410 { 3411 struct drm_framebuffer *fb = NULL; 3412 struct drm_framebuffer *fbl = NULL; 3413 uint32_t *id = data; 3414 int found = 0; 3415 3416 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3417 return -EINVAL; 3418 3419 mutex_lock(&file_priv->fbs_lock); 3420 mutex_lock(&dev->mode_config.fb_lock); 3421 fb = __drm_framebuffer_lookup(dev, *id); 3422 if (!fb) 3423 goto fail_lookup; 3424 3425 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3426 if (fb == fbl) 3427 found = 1; 3428 if (!found) 3429 goto fail_lookup; 3430 3431 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ 3432 __drm_framebuffer_unregister(dev, fb); 3433 3434 list_del_init(&fb->filp_head); 3435 mutex_unlock(&dev->mode_config.fb_lock); 3436 mutex_unlock(&file_priv->fbs_lock); 3437 3438 drm_framebuffer_remove(fb); 3439 3440 return 0; 3441 3442 fail_lookup: 3443 mutex_unlock(&dev->mode_config.fb_lock); 3444 mutex_unlock(&file_priv->fbs_lock); 3445 3446 return -ENOENT; 3447 } 3448 3449 /** 3450 * drm_mode_getfb - get FB info 3451 * @dev: drm device for the ioctl 3452 * @data: data pointer for the ioctl 3453 * @file_priv: drm file for the ioctl call 3454 * 3455 * Lookup the FB given its ID and return info about it. 3456 * 3457 * Called by the user via ioctl. 3458 * 3459 * Returns: 3460 * Zero on success, negative errno on failure. 3461 */ 3462 int drm_mode_getfb(struct drm_device *dev, 3463 void *data, struct drm_file *file_priv) 3464 { 3465 struct drm_mode_fb_cmd *r = data; 3466 struct drm_framebuffer *fb; 3467 int ret; 3468 3469 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3470 return -EINVAL; 3471 3472 fb = drm_framebuffer_lookup(dev, r->fb_id); 3473 if (!fb) 3474 return -ENOENT; 3475 3476 r->height = fb->height; 3477 r->width = fb->width; 3478 r->depth = fb->depth; 3479 r->bpp = fb->bits_per_pixel; 3480 r->pitch = fb->pitches[0]; 3481 if (fb->funcs->create_handle) { 3482 if (file_priv->is_master || capable(CAP_SYS_ADMIN) || 3483 drm_is_control_client(file_priv)) { 3484 ret = fb->funcs->create_handle(fb, file_priv, 3485 &r->handle); 3486 } else { 3487 /* GET_FB() is an unprivileged ioctl so we must not 3488 * return a buffer-handle to non-master processes! For 3489 * backwards-compatibility reasons, we cannot make 3490 * GET_FB() privileged, so just return an invalid handle 3491 * for non-masters. */ 3492 r->handle = 0; 3493 ret = 0; 3494 } 3495 } else { 3496 ret = -ENODEV; 3497 } 3498 3499 drm_framebuffer_unreference(fb); 3500 3501 return ret; 3502 } 3503 3504 /** 3505 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3506 * @dev: drm device for the ioctl 3507 * @data: data pointer for the ioctl 3508 * @file_priv: drm file for the ioctl call 3509 * 3510 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3511 * rectangle list. Generic userspace which does frontbuffer rendering must call 3512 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3513 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3514 * 3515 * Modesetting drivers which always update the frontbuffer do not need to 3516 * implement the corresponding ->dirty framebuffer callback. 3517 * 3518 * Called by the user via ioctl. 3519 * 3520 * Returns: 3521 * Zero on success, negative errno on failure. 3522 */ 3523 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3524 void *data, struct drm_file *file_priv) 3525 { 3526 struct drm_clip_rect __user *clips_ptr; 3527 struct drm_clip_rect *clips = NULL; 3528 struct drm_mode_fb_dirty_cmd *r = data; 3529 struct drm_framebuffer *fb; 3530 unsigned flags; 3531 int num_clips; 3532 int ret; 3533 3534 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3535 return -EINVAL; 3536 3537 fb = drm_framebuffer_lookup(dev, r->fb_id); 3538 if (!fb) 3539 return -ENOENT; 3540 3541 num_clips = r->num_clips; 3542 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3543 3544 if (!num_clips != !clips_ptr) { 3545 ret = -EINVAL; 3546 goto out_err1; 3547 } 3548 3549 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3550 3551 /* If userspace annotates copy, clips must come in pairs */ 3552 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3553 ret = -EINVAL; 3554 goto out_err1; 3555 } 3556 3557 if (num_clips && clips_ptr) { 3558 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3559 ret = -EINVAL; 3560 goto out_err1; 3561 } 3562 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); 3563 if (!clips) { 3564 ret = -ENOMEM; 3565 goto out_err1; 3566 } 3567 3568 ret = copy_from_user(clips, clips_ptr, 3569 num_clips * sizeof(*clips)); 3570 if (ret) { 3571 ret = -EFAULT; 3572 goto out_err2; 3573 } 3574 } 3575 3576 if (fb->funcs->dirty) { 3577 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3578 clips, num_clips); 3579 } else { 3580 ret = -ENOSYS; 3581 } 3582 3583 out_err2: 3584 kfree(clips); 3585 out_err1: 3586 drm_framebuffer_unreference(fb); 3587 3588 return ret; 3589 } 3590 3591 3592 /** 3593 * drm_fb_release - remove and free the FBs on this file 3594 * @priv: drm file for the ioctl 3595 * 3596 * Destroy all the FBs associated with @filp. 3597 * 3598 * Called by the user via ioctl. 3599 * 3600 * Returns: 3601 * Zero on success, negative errno on failure. 3602 */ 3603 void drm_fb_release(struct drm_file *priv) 3604 { 3605 struct drm_device *dev = priv->minor->dev; 3606 struct drm_framebuffer *fb, *tfb; 3607 3608 /* 3609 * When the file gets released that means no one else can access the fb 3610 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3611 * avoid upsetting lockdep since the universal cursor code adds a 3612 * framebuffer while holding mutex locks. 3613 * 3614 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3615 * locks is impossible here since no one else but this function can get 3616 * at it any more. 3617 */ 3618 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3619 3620 mutex_lock(&dev->mode_config.fb_lock); 3621 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ 3622 __drm_framebuffer_unregister(dev, fb); 3623 mutex_unlock(&dev->mode_config.fb_lock); 3624 3625 list_del_init(&fb->filp_head); 3626 3627 /* This will also drop the fpriv->fbs reference. */ 3628 drm_framebuffer_remove(fb); 3629 } 3630 } 3631 3632 /** 3633 * drm_property_create - create a new property type 3634 * @dev: drm device 3635 * @flags: flags specifying the property type 3636 * @name: name of the property 3637 * @num_values: number of pre-defined values 3638 * 3639 * This creates a new generic drm property which can then be attached to a drm 3640 * object with drm_object_attach_property. The returned property object must be 3641 * freed with drm_property_destroy. 3642 * 3643 * Note that the DRM core keeps a per-device list of properties and that, if 3644 * drm_mode_config_cleanup() is called, it will destroy all properties created 3645 * by the driver. 3646 * 3647 * Returns: 3648 * A pointer to the newly created property on success, NULL on failure. 3649 */ 3650 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3651 const char *name, int num_values) 3652 { 3653 struct drm_property *property = NULL; 3654 int ret; 3655 3656 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3657 if (!property) 3658 return NULL; 3659 3660 property->dev = dev; 3661 3662 if (num_values) { 3663 property->values = kcalloc(num_values, sizeof(uint64_t), 3664 GFP_KERNEL); 3665 if (!property->values) 3666 goto fail; 3667 } 3668 3669 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3670 if (ret) 3671 goto fail; 3672 3673 property->flags = flags; 3674 property->num_values = num_values; 3675 INIT_LIST_HEAD(&property->enum_list); 3676 3677 if (name) { 3678 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3679 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3680 } 3681 3682 list_add_tail(&property->head, &dev->mode_config.property_list); 3683 3684 WARN_ON(!drm_property_type_valid(property)); 3685 3686 return property; 3687 fail: 3688 kfree(property->values); 3689 kfree(property); 3690 return NULL; 3691 } 3692 EXPORT_SYMBOL(drm_property_create); 3693 3694 /** 3695 * drm_property_create_enum - create a new enumeration property type 3696 * @dev: drm device 3697 * @flags: flags specifying the property type 3698 * @name: name of the property 3699 * @props: enumeration lists with property values 3700 * @num_values: number of pre-defined values 3701 * 3702 * This creates a new generic drm property which can then be attached to a drm 3703 * object with drm_object_attach_property. The returned property object must be 3704 * freed with drm_property_destroy. 3705 * 3706 * Userspace is only allowed to set one of the predefined values for enumeration 3707 * properties. 3708 * 3709 * Returns: 3710 * A pointer to the newly created property on success, NULL on failure. 3711 */ 3712 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3713 const char *name, 3714 const struct drm_prop_enum_list *props, 3715 int num_values) 3716 { 3717 struct drm_property *property; 3718 int i, ret; 3719 3720 flags |= DRM_MODE_PROP_ENUM; 3721 3722 property = drm_property_create(dev, flags, name, num_values); 3723 if (!property) 3724 return NULL; 3725 3726 for (i = 0; i < num_values; i++) { 3727 ret = drm_property_add_enum(property, i, 3728 props[i].type, 3729 props[i].name); 3730 if (ret) { 3731 drm_property_destroy(dev, property); 3732 return NULL; 3733 } 3734 } 3735 3736 return property; 3737 } 3738 EXPORT_SYMBOL(drm_property_create_enum); 3739 3740 /** 3741 * drm_property_create_bitmask - create a new bitmask property type 3742 * @dev: drm device 3743 * @flags: flags specifying the property type 3744 * @name: name of the property 3745 * @props: enumeration lists with property bitflags 3746 * @num_props: size of the @props array 3747 * @supported_bits: bitmask of all supported enumeration values 3748 * 3749 * This creates a new bitmask drm property which can then be attached to a drm 3750 * object with drm_object_attach_property. The returned property object must be 3751 * freed with drm_property_destroy. 3752 * 3753 * Compared to plain enumeration properties userspace is allowed to set any 3754 * or'ed together combination of the predefined property bitflag values 3755 * 3756 * Returns: 3757 * A pointer to the newly created property on success, NULL on failure. 3758 */ 3759 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3760 int flags, const char *name, 3761 const struct drm_prop_enum_list *props, 3762 int num_props, 3763 uint64_t supported_bits) 3764 { 3765 struct drm_property *property; 3766 int i, ret, index = 0; 3767 int num_values = hweight64(supported_bits); 3768 3769 flags |= DRM_MODE_PROP_BITMASK; 3770 3771 property = drm_property_create(dev, flags, name, num_values); 3772 if (!property) 3773 return NULL; 3774 for (i = 0; i < num_props; i++) { 3775 if (!(supported_bits & (1ULL << props[i].type))) 3776 continue; 3777 3778 if (WARN_ON(index >= num_values)) { 3779 drm_property_destroy(dev, property); 3780 return NULL; 3781 } 3782 3783 ret = drm_property_add_enum(property, index++, 3784 props[i].type, 3785 props[i].name); 3786 if (ret) { 3787 drm_property_destroy(dev, property); 3788 return NULL; 3789 } 3790 } 3791 3792 return property; 3793 } 3794 EXPORT_SYMBOL(drm_property_create_bitmask); 3795 3796 static struct drm_property *property_create_range(struct drm_device *dev, 3797 int flags, const char *name, 3798 uint64_t min, uint64_t max) 3799 { 3800 struct drm_property *property; 3801 3802 property = drm_property_create(dev, flags, name, 2); 3803 if (!property) 3804 return NULL; 3805 3806 property->values[0] = min; 3807 property->values[1] = max; 3808 3809 return property; 3810 } 3811 3812 /** 3813 * drm_property_create_range - create a new unsigned ranged property type 3814 * @dev: drm device 3815 * @flags: flags specifying the property type 3816 * @name: name of the property 3817 * @min: minimum value of the property 3818 * @max: maximum value of the property 3819 * 3820 * This creates a new generic drm property which can then be attached to a drm 3821 * object with drm_object_attach_property. The returned property object must be 3822 * freed with drm_property_destroy. 3823 * 3824 * Userspace is allowed to set any unsigned integer value in the (min, max) 3825 * range inclusive. 3826 * 3827 * Returns: 3828 * A pointer to the newly created property on success, NULL on failure. 3829 */ 3830 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3831 const char *name, 3832 uint64_t min, uint64_t max) 3833 { 3834 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3835 name, min, max); 3836 } 3837 EXPORT_SYMBOL(drm_property_create_range); 3838 3839 /** 3840 * drm_property_create_signed_range - create a new signed ranged property type 3841 * @dev: drm device 3842 * @flags: flags specifying the property type 3843 * @name: name of the property 3844 * @min: minimum value of the property 3845 * @max: maximum value of the property 3846 * 3847 * This creates a new generic drm property which can then be attached to a drm 3848 * object with drm_object_attach_property. The returned property object must be 3849 * freed with drm_property_destroy. 3850 * 3851 * Userspace is allowed to set any signed integer value in the (min, max) 3852 * range inclusive. 3853 * 3854 * Returns: 3855 * A pointer to the newly created property on success, NULL on failure. 3856 */ 3857 struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3858 int flags, const char *name, 3859 int64_t min, int64_t max) 3860 { 3861 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3862 name, I642U64(min), I642U64(max)); 3863 } 3864 EXPORT_SYMBOL(drm_property_create_signed_range); 3865 3866 /** 3867 * drm_property_create_object - create a new object property type 3868 * @dev: drm device 3869 * @flags: flags specifying the property type 3870 * @name: name of the property 3871 * @type: object type from DRM_MODE_OBJECT_* defines 3872 * 3873 * This creates a new generic drm property which can then be attached to a drm 3874 * object with drm_object_attach_property. The returned property object must be 3875 * freed with drm_property_destroy. 3876 * 3877 * Userspace is only allowed to set this to any property value of the given 3878 * @type. Only useful for atomic properties, which is enforced. 3879 * 3880 * Returns: 3881 * A pointer to the newly created property on success, NULL on failure. 3882 */ 3883 struct drm_property *drm_property_create_object(struct drm_device *dev, 3884 int flags, const char *name, uint32_t type) 3885 { 3886 struct drm_property *property; 3887 3888 flags |= DRM_MODE_PROP_OBJECT; 3889 3890 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) 3891 return NULL; 3892 3893 property = drm_property_create(dev, flags, name, 1); 3894 if (!property) 3895 return NULL; 3896 3897 property->values[0] = type; 3898 3899 return property; 3900 } 3901 EXPORT_SYMBOL(drm_property_create_object); 3902 3903 /** 3904 * drm_property_create_bool - create a new boolean property type 3905 * @dev: drm device 3906 * @flags: flags specifying the property type 3907 * @name: name of the property 3908 * 3909 * This creates a new generic drm property which can then be attached to a drm 3910 * object with drm_object_attach_property. The returned property object must be 3911 * freed with drm_property_destroy. 3912 * 3913 * This is implemented as a ranged property with only {0, 1} as valid values. 3914 * 3915 * Returns: 3916 * A pointer to the newly created property on success, NULL on failure. 3917 */ 3918 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, 3919 const char *name) 3920 { 3921 return drm_property_create_range(dev, flags, name, 0, 1); 3922 } 3923 EXPORT_SYMBOL(drm_property_create_bool); 3924 3925 /** 3926 * drm_property_add_enum - add a possible value to an enumeration property 3927 * @property: enumeration property to change 3928 * @index: index of the new enumeration 3929 * @value: value of the new enumeration 3930 * @name: symbolic name of the new enumeration 3931 * 3932 * This functions adds enumerations to a property. 3933 * 3934 * It's use is deprecated, drivers should use one of the more specific helpers 3935 * to directly create the property with all enumerations already attached. 3936 * 3937 * Returns: 3938 * Zero on success, error code on failure. 3939 */ 3940 int drm_property_add_enum(struct drm_property *property, int index, 3941 uint64_t value, const char *name) 3942 { 3943 struct drm_property_enum *prop_enum; 3944 3945 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3946 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3947 return -EINVAL; 3948 3949 /* 3950 * Bitmask enum properties have the additional constraint of values 3951 * from 0 to 63 3952 */ 3953 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3954 (value > 63)) 3955 return -EINVAL; 3956 3957 if (!list_empty(&property->enum_list)) { 3958 list_for_each_entry(prop_enum, &property->enum_list, head) { 3959 if (prop_enum->value == value) { 3960 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3961 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3962 return 0; 3963 } 3964 } 3965 } 3966 3967 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3968 if (!prop_enum) 3969 return -ENOMEM; 3970 3971 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3972 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3973 prop_enum->value = value; 3974 3975 property->values[index] = value; 3976 list_add_tail(&prop_enum->head, &property->enum_list); 3977 return 0; 3978 } 3979 EXPORT_SYMBOL(drm_property_add_enum); 3980 3981 /** 3982 * drm_property_destroy - destroy a drm property 3983 * @dev: drm device 3984 * @property: property to destry 3985 * 3986 * This function frees a property including any attached resources like 3987 * enumeration values. 3988 */ 3989 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 3990 { 3991 struct drm_property_enum *prop_enum, *pt; 3992 3993 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 3994 list_del(&prop_enum->head); 3995 kfree(prop_enum); 3996 } 3997 3998 if (property->num_values) 3999 kfree(property->values); 4000 drm_mode_object_put(dev, &property->base); 4001 list_del(&property->head); 4002 kfree(property); 4003 } 4004 EXPORT_SYMBOL(drm_property_destroy); 4005 4006 /** 4007 * drm_object_attach_property - attach a property to a modeset object 4008 * @obj: drm modeset object 4009 * @property: property to attach 4010 * @init_val: initial value of the property 4011 * 4012 * This attaches the given property to the modeset object with the given initial 4013 * value. Currently this function cannot fail since the properties are stored in 4014 * a statically sized array. 4015 */ 4016 void drm_object_attach_property(struct drm_mode_object *obj, 4017 struct drm_property *property, 4018 uint64_t init_val) 4019 { 4020 int count = obj->properties->count; 4021 4022 if (count == DRM_OBJECT_MAX_PROPERTY) { 4023 WARN(1, "Failed to attach object property (type: 0x%x). Please " 4024 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 4025 "you see this message on the same object type.\n", 4026 obj->type); 4027 return; 4028 } 4029 4030 obj->properties->properties[count] = property; 4031 obj->properties->values[count] = init_val; 4032 obj->properties->count++; 4033 if (property->flags & DRM_MODE_PROP_ATOMIC) 4034 obj->properties->atomic_count++; 4035 } 4036 EXPORT_SYMBOL(drm_object_attach_property); 4037 4038 /** 4039 * drm_object_property_set_value - set the value of a property 4040 * @obj: drm mode object to set property value for 4041 * @property: property to set 4042 * @val: value the property should be set to 4043 * 4044 * This functions sets a given property on a given object. This function only 4045 * changes the software state of the property, it does not call into the 4046 * driver's ->set_property callback. 4047 * 4048 * Returns: 4049 * Zero on success, error code on failure. 4050 */ 4051 int drm_object_property_set_value(struct drm_mode_object *obj, 4052 struct drm_property *property, uint64_t val) 4053 { 4054 int i; 4055 4056 for (i = 0; i < obj->properties->count; i++) { 4057 if (obj->properties->properties[i] == property) { 4058 obj->properties->values[i] = val; 4059 return 0; 4060 } 4061 } 4062 4063 return -EINVAL; 4064 } 4065 EXPORT_SYMBOL(drm_object_property_set_value); 4066 4067 /** 4068 * drm_object_property_get_value - retrieve the value of a property 4069 * @obj: drm mode object to get property value from 4070 * @property: property to retrieve 4071 * @val: storage for the property value 4072 * 4073 * This function retrieves the softare state of the given property for the given 4074 * property. Since there is no driver callback to retrieve the current property 4075 * value this might be out of sync with the hardware, depending upon the driver 4076 * and property. 4077 * 4078 * Returns: 4079 * Zero on success, error code on failure. 4080 */ 4081 int drm_object_property_get_value(struct drm_mode_object *obj, 4082 struct drm_property *property, uint64_t *val) 4083 { 4084 int i; 4085 4086 /* read-only properties bypass atomic mechanism and still store 4087 * their value in obj->properties->values[].. mostly to avoid 4088 * having to deal w/ EDID and similar props in atomic paths: 4089 */ 4090 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && 4091 !(property->flags & DRM_MODE_PROP_IMMUTABLE)) 4092 return drm_atomic_get_property(obj, property, val); 4093 4094 for (i = 0; i < obj->properties->count; i++) { 4095 if (obj->properties->properties[i] == property) { 4096 *val = obj->properties->values[i]; 4097 return 0; 4098 } 4099 } 4100 4101 return -EINVAL; 4102 } 4103 EXPORT_SYMBOL(drm_object_property_get_value); 4104 4105 /** 4106 * drm_mode_getproperty_ioctl - get the property metadata 4107 * @dev: DRM device 4108 * @data: ioctl data 4109 * @file_priv: DRM file info 4110 * 4111 * This function retrieves the metadata for a given property, like the different 4112 * possible values for an enum property or the limits for a range property. 4113 * 4114 * Blob properties are special 4115 * 4116 * Called by the user via ioctl. 4117 * 4118 * Returns: 4119 * Zero on success, negative errno on failure. 4120 */ 4121 int drm_mode_getproperty_ioctl(struct drm_device *dev, 4122 void *data, struct drm_file *file_priv) 4123 { 4124 struct drm_mode_get_property *out_resp = data; 4125 struct drm_property *property; 4126 int enum_count = 0; 4127 int value_count = 0; 4128 int ret = 0, i; 4129 int copied; 4130 struct drm_property_enum *prop_enum; 4131 struct drm_mode_property_enum __user *enum_ptr; 4132 uint64_t __user *values_ptr; 4133 4134 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4135 return -EINVAL; 4136 4137 drm_modeset_lock_all(dev); 4138 property = drm_property_find(dev, out_resp->prop_id); 4139 if (!property) { 4140 ret = -ENOENT; 4141 goto done; 4142 } 4143 4144 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4145 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4146 list_for_each_entry(prop_enum, &property->enum_list, head) 4147 enum_count++; 4148 } 4149 4150 value_count = property->num_values; 4151 4152 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 4153 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 4154 out_resp->flags = property->flags; 4155 4156 if ((out_resp->count_values >= value_count) && value_count) { 4157 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 4158 for (i = 0; i < value_count; i++) { 4159 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 4160 ret = -EFAULT; 4161 goto done; 4162 } 4163 } 4164 } 4165 out_resp->count_values = value_count; 4166 4167 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4168 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4169 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 4170 copied = 0; 4171 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 4172 list_for_each_entry(prop_enum, &property->enum_list, head) { 4173 4174 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 4175 ret = -EFAULT; 4176 goto done; 4177 } 4178 4179 if (copy_to_user(&enum_ptr[copied].name, 4180 &prop_enum->name, DRM_PROP_NAME_LEN)) { 4181 ret = -EFAULT; 4182 goto done; 4183 } 4184 copied++; 4185 } 4186 } 4187 out_resp->count_enum_blobs = enum_count; 4188 } 4189 4190 /* 4191 * NOTE: The idea seems to have been to use this to read all the blob 4192 * property values. But nothing ever added them to the corresponding 4193 * list, userspace always used the special-purpose get_blob ioctl to 4194 * read the value for a blob property. It also doesn't make a lot of 4195 * sense to return values here when everything else is just metadata for 4196 * the property itself. 4197 */ 4198 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4199 out_resp->count_enum_blobs = 0; 4200 done: 4201 drm_modeset_unlock_all(dev); 4202 return ret; 4203 } 4204 4205 static struct drm_property_blob * 4206 drm_property_create_blob(struct drm_device *dev, size_t length, 4207 const void *data) 4208 { 4209 struct drm_property_blob *blob; 4210 int ret; 4211 4212 if (!length || !data) 4213 return NULL; 4214 4215 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4216 if (!blob) 4217 return NULL; 4218 4219 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 4220 if (ret) { 4221 kfree(blob); 4222 return NULL; 4223 } 4224 4225 blob->length = length; 4226 4227 memcpy(blob->data, data, length); 4228 4229 list_add_tail(&blob->head, &dev->mode_config.property_blob_list); 4230 return blob; 4231 } 4232 4233 static void drm_property_destroy_blob(struct drm_device *dev, 4234 struct drm_property_blob *blob) 4235 { 4236 drm_mode_object_put(dev, &blob->base); 4237 list_del(&blob->head); 4238 kfree(blob); 4239 } 4240 4241 /** 4242 * drm_mode_getblob_ioctl - get the contents of a blob property value 4243 * @dev: DRM device 4244 * @data: ioctl data 4245 * @file_priv: DRM file info 4246 * 4247 * This function retrieves the contents of a blob property. The value stored in 4248 * an object's blob property is just a normal modeset object id. 4249 * 4250 * Called by the user via ioctl. 4251 * 4252 * Returns: 4253 * Zero on success, negative errno on failure. 4254 */ 4255 int drm_mode_getblob_ioctl(struct drm_device *dev, 4256 void *data, struct drm_file *file_priv) 4257 { 4258 struct drm_mode_get_blob *out_resp = data; 4259 struct drm_property_blob *blob; 4260 int ret = 0; 4261 void __user *blob_ptr; 4262 4263 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4264 return -EINVAL; 4265 4266 drm_modeset_lock_all(dev); 4267 blob = drm_property_blob_find(dev, out_resp->blob_id); 4268 if (!blob) { 4269 ret = -ENOENT; 4270 goto done; 4271 } 4272 4273 if (out_resp->length == blob->length) { 4274 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4275 if (copy_to_user(blob_ptr, blob->data, blob->length)) { 4276 ret = -EFAULT; 4277 goto done; 4278 } 4279 } 4280 out_resp->length = blob->length; 4281 4282 done: 4283 drm_modeset_unlock_all(dev); 4284 return ret; 4285 } 4286 4287 /** 4288 * drm_mode_connector_set_path_property - set tile property on connector 4289 * @connector: connector to set property on. 4290 * @path: path to use for property. 4291 * 4292 * This creates a property to expose to userspace to specify a 4293 * connector path. This is mainly used for DisplayPort MST where 4294 * connectors have a topology and we want to allow userspace to give 4295 * them more meaningful names. 4296 * 4297 * Returns: 4298 * Zero on success, negative errno on failure. 4299 */ 4300 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4301 const char *path) 4302 { 4303 struct drm_device *dev = connector->dev; 4304 size_t size = strlen(path) + 1; 4305 int ret; 4306 4307 connector->path_blob_ptr = drm_property_create_blob(connector->dev, 4308 size, path); 4309 if (!connector->path_blob_ptr) 4310 return -EINVAL; 4311 4312 ret = drm_object_property_set_value(&connector->base, 4313 dev->mode_config.path_property, 4314 connector->path_blob_ptr->base.id); 4315 return ret; 4316 } 4317 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4318 4319 /** 4320 * drm_mode_connector_set_tile_property - set tile property on connector 4321 * @connector: connector to set property on. 4322 * 4323 * This looks up the tile information for a connector, and creates a 4324 * property for userspace to parse if it exists. The property is of 4325 * the form of 8 integers using ':' as a separator. 4326 * 4327 * Returns: 4328 * Zero on success, errno on failure. 4329 */ 4330 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4331 { 4332 struct drm_device *dev = connector->dev; 4333 int ret, size; 4334 char tile[256]; 4335 4336 if (connector->tile_blob_ptr) 4337 drm_property_destroy_blob(dev, connector->tile_blob_ptr); 4338 4339 if (!connector->has_tile) { 4340 connector->tile_blob_ptr = NULL; 4341 ret = drm_object_property_set_value(&connector->base, 4342 dev->mode_config.tile_property, 0); 4343 return ret; 4344 } 4345 4346 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4347 connector->tile_group->id, connector->tile_is_single_monitor, 4348 connector->num_h_tile, connector->num_v_tile, 4349 connector->tile_h_loc, connector->tile_v_loc, 4350 connector->tile_h_size, connector->tile_v_size); 4351 size = strlen(tile) + 1; 4352 4353 connector->tile_blob_ptr = drm_property_create_blob(connector->dev, 4354 size, tile); 4355 if (!connector->tile_blob_ptr) 4356 return -EINVAL; 4357 4358 ret = drm_object_property_set_value(&connector->base, 4359 dev->mode_config.tile_property, 4360 connector->tile_blob_ptr->base.id); 4361 return ret; 4362 } 4363 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4364 4365 /** 4366 * drm_mode_connector_update_edid_property - update the edid property of a connector 4367 * @connector: drm connector 4368 * @edid: new value of the edid property 4369 * 4370 * This function creates a new blob modeset object and assigns its id to the 4371 * connector's edid property. 4372 * 4373 * Returns: 4374 * Zero on success, negative errno on failure. 4375 */ 4376 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4377 const struct edid *edid) 4378 { 4379 struct drm_device *dev = connector->dev; 4380 size_t size; 4381 int ret; 4382 4383 /* ignore requests to set edid when overridden */ 4384 if (connector->override_edid) 4385 return 0; 4386 4387 if (connector->edid_blob_ptr) 4388 drm_property_destroy_blob(dev, connector->edid_blob_ptr); 4389 4390 /* Delete edid, when there is none. */ 4391 if (!edid) { 4392 connector->edid_blob_ptr = NULL; 4393 ret = drm_object_property_set_value(&connector->base, dev->mode_config.edid_property, 0); 4394 return ret; 4395 } 4396 4397 size = EDID_LENGTH * (1 + edid->extensions); 4398 connector->edid_blob_ptr = drm_property_create_blob(connector->dev, 4399 size, edid); 4400 if (!connector->edid_blob_ptr) 4401 return -EINVAL; 4402 4403 ret = drm_object_property_set_value(&connector->base, 4404 dev->mode_config.edid_property, 4405 connector->edid_blob_ptr->base.id); 4406 4407 return ret; 4408 } 4409 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4410 4411 /* Some properties could refer to dynamic refcnt'd objects, or things that 4412 * need special locking to handle lifetime issues (ie. to ensure the prop 4413 * value doesn't become invalid part way through the property update due to 4414 * race). The value returned by reference via 'obj' should be passed back 4415 * to drm_property_change_valid_put() after the property is set (and the 4416 * object to which the property is attached has a chance to take it's own 4417 * reference). 4418 */ 4419 bool drm_property_change_valid_get(struct drm_property *property, 4420 uint64_t value, struct drm_mode_object **ref) 4421 { 4422 int i; 4423 4424 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4425 return false; 4426 4427 *ref = NULL; 4428 4429 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4430 if (value < property->values[0] || value > property->values[1]) 4431 return false; 4432 return true; 4433 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4434 int64_t svalue = U642I64(value); 4435 4436 if (svalue < U642I64(property->values[0]) || 4437 svalue > U642I64(property->values[1])) 4438 return false; 4439 return true; 4440 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4441 uint64_t valid_mask = 0; 4442 4443 for (i = 0; i < property->num_values; i++) 4444 valid_mask |= (1ULL << property->values[i]); 4445 return !(value & ~valid_mask); 4446 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4447 /* Only the driver knows */ 4448 return true; 4449 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4450 /* a zero value for an object property translates to null: */ 4451 if (value == 0) 4452 return true; 4453 4454 /* handle refcnt'd objects specially: */ 4455 if (property->values[0] == DRM_MODE_OBJECT_FB) { 4456 struct drm_framebuffer *fb; 4457 fb = drm_framebuffer_lookup(property->dev, value); 4458 if (fb) { 4459 *ref = &fb->base; 4460 return true; 4461 } else { 4462 return false; 4463 } 4464 } else { 4465 return _object_find(property->dev, value, property->values[0]) != NULL; 4466 } 4467 } 4468 4469 for (i = 0; i < property->num_values; i++) 4470 if (property->values[i] == value) 4471 return true; 4472 return false; 4473 } 4474 4475 void drm_property_change_valid_put(struct drm_property *property, 4476 struct drm_mode_object *ref) 4477 { 4478 if (!ref) 4479 return; 4480 4481 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4482 if (property->values[0] == DRM_MODE_OBJECT_FB) 4483 drm_framebuffer_unreference(obj_to_fb(ref)); 4484 } 4485 } 4486 4487 /** 4488 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4489 * @dev: DRM device 4490 * @data: ioctl data 4491 * @file_priv: DRM file info 4492 * 4493 * This function sets the current value for a connectors's property. It also 4494 * calls into a driver's ->set_property callback to update the hardware state 4495 * 4496 * Called by the user via ioctl. 4497 * 4498 * Returns: 4499 * Zero on success, negative errno on failure. 4500 */ 4501 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4502 void *data, struct drm_file *file_priv) 4503 { 4504 struct drm_mode_connector_set_property *conn_set_prop = data; 4505 struct drm_mode_obj_set_property obj_set_prop = { 4506 .value = conn_set_prop->value, 4507 .prop_id = conn_set_prop->prop_id, 4508 .obj_id = conn_set_prop->connector_id, 4509 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4510 }; 4511 4512 /* It does all the locking and checking we need */ 4513 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4514 } 4515 4516 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4517 struct drm_property *property, 4518 uint64_t value) 4519 { 4520 int ret = -EINVAL; 4521 struct drm_connector *connector = obj_to_connector(obj); 4522 4523 /* Do DPMS ourselves */ 4524 if (property == connector->dev->mode_config.dpms_property) { 4525 if (connector->funcs->dpms) 4526 (*connector->funcs->dpms)(connector, (int)value); 4527 ret = 0; 4528 } else if (connector->funcs->set_property) 4529 ret = connector->funcs->set_property(connector, property, value); 4530 4531 /* store the property value if successful */ 4532 if (!ret) 4533 drm_object_property_set_value(&connector->base, property, value); 4534 return ret; 4535 } 4536 4537 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4538 struct drm_property *property, 4539 uint64_t value) 4540 { 4541 int ret = -EINVAL; 4542 struct drm_crtc *crtc = obj_to_crtc(obj); 4543 4544 if (crtc->funcs->set_property) 4545 ret = crtc->funcs->set_property(crtc, property, value); 4546 if (!ret) 4547 drm_object_property_set_value(obj, property, value); 4548 4549 return ret; 4550 } 4551 4552 /** 4553 * drm_mode_plane_set_obj_prop - set the value of a property 4554 * @plane: drm plane object to set property value for 4555 * @property: property to set 4556 * @value: value the property should be set to 4557 * 4558 * This functions sets a given property on a given plane object. This function 4559 * calls the driver's ->set_property callback and changes the software state of 4560 * the property if the callback succeeds. 4561 * 4562 * Returns: 4563 * Zero on success, error code on failure. 4564 */ 4565 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4566 struct drm_property *property, 4567 uint64_t value) 4568 { 4569 int ret = -EINVAL; 4570 struct drm_mode_object *obj = &plane->base; 4571 4572 if (plane->funcs->set_property) 4573 ret = plane->funcs->set_property(plane, property, value); 4574 if (!ret) 4575 drm_object_property_set_value(obj, property, value); 4576 4577 return ret; 4578 } 4579 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4580 4581 /** 4582 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 4583 * @dev: DRM device 4584 * @data: ioctl data 4585 * @file_priv: DRM file info 4586 * 4587 * This function retrieves the current value for an object's property. Compared 4588 * to the connector specific ioctl this one is extended to also work on crtc and 4589 * plane objects. 4590 * 4591 * Called by the user via ioctl. 4592 * 4593 * Returns: 4594 * Zero on success, negative errno on failure. 4595 */ 4596 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4597 struct drm_file *file_priv) 4598 { 4599 struct drm_mode_obj_get_properties *arg = data; 4600 struct drm_mode_object *obj; 4601 int ret = 0; 4602 4603 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4604 return -EINVAL; 4605 4606 drm_modeset_lock_all(dev); 4607 4608 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4609 if (!obj) { 4610 ret = -ENOENT; 4611 goto out; 4612 } 4613 if (!obj->properties) { 4614 ret = -EINVAL; 4615 goto out; 4616 } 4617 4618 ret = get_properties(obj, file_priv->atomic, 4619 (uint32_t __user *)(unsigned long)(arg->props_ptr), 4620 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), 4621 &arg->count_props); 4622 4623 out: 4624 drm_modeset_unlock_all(dev); 4625 return ret; 4626 } 4627 4628 /** 4629 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 4630 * @dev: DRM device 4631 * @data: ioctl data 4632 * @file_priv: DRM file info 4633 * 4634 * This function sets the current value for an object's property. It also calls 4635 * into a driver's ->set_property callback to update the hardware state. 4636 * Compared to the connector specific ioctl this one is extended to also work on 4637 * crtc and plane objects. 4638 * 4639 * Called by the user via ioctl. 4640 * 4641 * Returns: 4642 * Zero on success, negative errno on failure. 4643 */ 4644 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 4645 struct drm_file *file_priv) 4646 { 4647 struct drm_mode_obj_set_property *arg = data; 4648 struct drm_mode_object *arg_obj; 4649 struct drm_mode_object *prop_obj; 4650 struct drm_property *property; 4651 int i, ret = -EINVAL; 4652 struct drm_mode_object *ref; 4653 4654 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4655 return -EINVAL; 4656 4657 drm_modeset_lock_all(dev); 4658 4659 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4660 if (!arg_obj) { 4661 ret = -ENOENT; 4662 goto out; 4663 } 4664 if (!arg_obj->properties) 4665 goto out; 4666 4667 for (i = 0; i < arg_obj->properties->count; i++) 4668 if (arg_obj->properties->properties[i]->base.id == arg->prop_id) 4669 break; 4670 4671 if (i == arg_obj->properties->count) 4672 goto out; 4673 4674 prop_obj = drm_mode_object_find(dev, arg->prop_id, 4675 DRM_MODE_OBJECT_PROPERTY); 4676 if (!prop_obj) { 4677 ret = -ENOENT; 4678 goto out; 4679 } 4680 property = obj_to_property(prop_obj); 4681 4682 if (!drm_property_change_valid_get(property, arg->value, &ref)) 4683 goto out; 4684 4685 switch (arg_obj->type) { 4686 case DRM_MODE_OBJECT_CONNECTOR: 4687 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 4688 arg->value); 4689 break; 4690 case DRM_MODE_OBJECT_CRTC: 4691 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 4692 break; 4693 case DRM_MODE_OBJECT_PLANE: 4694 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 4695 property, arg->value); 4696 break; 4697 } 4698 4699 drm_property_change_valid_put(property, ref); 4700 4701 out: 4702 drm_modeset_unlock_all(dev); 4703 return ret; 4704 } 4705 4706 /** 4707 * drm_mode_connector_attach_encoder - attach a connector to an encoder 4708 * @connector: connector to attach 4709 * @encoder: encoder to attach @connector to 4710 * 4711 * This function links up a connector to an encoder. Note that the routing 4712 * restrictions between encoders and crtcs are exposed to userspace through the 4713 * possible_clones and possible_crtcs bitmasks. 4714 * 4715 * Returns: 4716 * Zero on success, negative errno on failure. 4717 */ 4718 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 4719 struct drm_encoder *encoder) 4720 { 4721 int i; 4722 4723 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 4724 if (connector->encoder_ids[i] == 0) { 4725 connector->encoder_ids[i] = encoder->base.id; 4726 return 0; 4727 } 4728 } 4729 return -ENOMEM; 4730 } 4731 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 4732 4733 /** 4734 * drm_mode_crtc_set_gamma_size - set the gamma table size 4735 * @crtc: CRTC to set the gamma table size for 4736 * @gamma_size: size of the gamma table 4737 * 4738 * Drivers which support gamma tables should set this to the supported gamma 4739 * table size when initializing the CRTC. Currently the drm core only supports a 4740 * fixed gamma table size. 4741 * 4742 * Returns: 4743 * Zero on success, negative errno on failure. 4744 */ 4745 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 4746 int gamma_size) 4747 { 4748 crtc->gamma_size = gamma_size; 4749 4750 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, 4751 GFP_KERNEL); 4752 if (!crtc->gamma_store) { 4753 crtc->gamma_size = 0; 4754 return -ENOMEM; 4755 } 4756 4757 return 0; 4758 } 4759 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 4760 4761 /** 4762 * drm_mode_gamma_set_ioctl - set the gamma table 4763 * @dev: DRM device 4764 * @data: ioctl data 4765 * @file_priv: DRM file info 4766 * 4767 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 4768 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 4769 * 4770 * Called by the user via ioctl. 4771 * 4772 * Returns: 4773 * Zero on success, negative errno on failure. 4774 */ 4775 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 4776 void *data, struct drm_file *file_priv) 4777 { 4778 struct drm_mode_crtc_lut *crtc_lut = data; 4779 struct drm_crtc *crtc; 4780 void *r_base, *g_base, *b_base; 4781 int size; 4782 int ret = 0; 4783 4784 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4785 return -EINVAL; 4786 4787 drm_modeset_lock_all(dev); 4788 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 4789 if (!crtc) { 4790 ret = -ENOENT; 4791 goto out; 4792 } 4793 4794 if (crtc->funcs->gamma_set == NULL) { 4795 ret = -ENOSYS; 4796 goto out; 4797 } 4798 4799 /* memcpy into gamma store */ 4800 if (crtc_lut->gamma_size != crtc->gamma_size) { 4801 ret = -EINVAL; 4802 goto out; 4803 } 4804 4805 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 4806 r_base = crtc->gamma_store; 4807 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 4808 ret = -EFAULT; 4809 goto out; 4810 } 4811 4812 g_base = r_base + size; 4813 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 4814 ret = -EFAULT; 4815 goto out; 4816 } 4817 4818 b_base = g_base + size; 4819 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 4820 ret = -EFAULT; 4821 goto out; 4822 } 4823 4824 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 4825 4826 out: 4827 drm_modeset_unlock_all(dev); 4828 return ret; 4829 4830 } 4831 4832 /** 4833 * drm_mode_gamma_get_ioctl - get the gamma table 4834 * @dev: DRM device 4835 * @data: ioctl data 4836 * @file_priv: DRM file info 4837 * 4838 * Copy the current gamma table into the storage provided. This also provides 4839 * the gamma table size the driver expects, which can be used to size the 4840 * allocated storage. 4841 * 4842 * Called by the user via ioctl. 4843 * 4844 * Returns: 4845 * Zero on success, negative errno on failure. 4846 */ 4847 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 4848 void *data, struct drm_file *file_priv) 4849 { 4850 struct drm_mode_crtc_lut *crtc_lut = data; 4851 struct drm_crtc *crtc; 4852 void *r_base, *g_base, *b_base; 4853 int size; 4854 int ret = 0; 4855 4856 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4857 return -EINVAL; 4858 4859 drm_modeset_lock_all(dev); 4860 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 4861 if (!crtc) { 4862 ret = -ENOENT; 4863 goto out; 4864 } 4865 4866 /* memcpy into gamma store */ 4867 if (crtc_lut->gamma_size != crtc->gamma_size) { 4868 ret = -EINVAL; 4869 goto out; 4870 } 4871 4872 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 4873 r_base = crtc->gamma_store; 4874 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 4875 ret = -EFAULT; 4876 goto out; 4877 } 4878 4879 g_base = r_base + size; 4880 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 4881 ret = -EFAULT; 4882 goto out; 4883 } 4884 4885 b_base = g_base + size; 4886 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 4887 ret = -EFAULT; 4888 goto out; 4889 } 4890 out: 4891 drm_modeset_unlock_all(dev); 4892 return ret; 4893 } 4894 4895 /** 4896 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 4897 * @dev: DRM device 4898 * @data: ioctl data 4899 * @file_priv: DRM file info 4900 * 4901 * This schedules an asynchronous update on a given CRTC, called page flip. 4902 * Optionally a drm event is generated to signal the completion of the event. 4903 * Generic drivers cannot assume that a pageflip with changed framebuffer 4904 * properties (including driver specific metadata like tiling layout) will work, 4905 * but some drivers support e.g. pixel format changes through the pageflip 4906 * ioctl. 4907 * 4908 * Called by the user via ioctl. 4909 * 4910 * Returns: 4911 * Zero on success, negative errno on failure. 4912 */ 4913 int drm_mode_page_flip_ioctl(struct drm_device *dev, 4914 void *data, struct drm_file *file_priv) 4915 { 4916 struct drm_mode_crtc_page_flip *page_flip = data; 4917 struct drm_crtc *crtc; 4918 struct drm_framebuffer *fb = NULL; 4919 struct drm_pending_vblank_event *e = NULL; 4920 unsigned long flags; 4921 int ret = -EINVAL; 4922 4923 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 4924 page_flip->reserved != 0) 4925 return -EINVAL; 4926 4927 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 4928 return -EINVAL; 4929 4930 crtc = drm_crtc_find(dev, page_flip->crtc_id); 4931 if (!crtc) 4932 return -ENOENT; 4933 4934 drm_modeset_lock_crtc(crtc, crtc->primary); 4935 if (crtc->primary->fb == NULL) { 4936 /* The framebuffer is currently unbound, presumably 4937 * due to a hotplug event, that userspace has not 4938 * yet discovered. 4939 */ 4940 ret = -EBUSY; 4941 goto out; 4942 } 4943 4944 if (crtc->funcs->page_flip == NULL) 4945 goto out; 4946 4947 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 4948 if (!fb) { 4949 ret = -ENOENT; 4950 goto out; 4951 } 4952 4953 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 4954 if (ret) 4955 goto out; 4956 4957 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 4958 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 4959 ret = -EINVAL; 4960 goto out; 4961 } 4962 4963 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 4964 ret = -ENOMEM; 4965 spin_lock_irqsave(&dev->event_lock, flags); 4966 if (file_priv->event_space < sizeof(e->event)) { 4967 spin_unlock_irqrestore(&dev->event_lock, flags); 4968 goto out; 4969 } 4970 file_priv->event_space -= sizeof(e->event); 4971 spin_unlock_irqrestore(&dev->event_lock, flags); 4972 4973 e = kzalloc(sizeof(*e), GFP_KERNEL); 4974 if (e == NULL) { 4975 spin_lock_irqsave(&dev->event_lock, flags); 4976 file_priv->event_space += sizeof(e->event); 4977 spin_unlock_irqrestore(&dev->event_lock, flags); 4978 goto out; 4979 } 4980 4981 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 4982 e->event.base.length = sizeof(e->event); 4983 e->event.user_data = page_flip->user_data; 4984 e->base.event = &e->event.base; 4985 e->base.file_priv = file_priv; 4986 e->base.destroy = 4987 (void (*) (struct drm_pending_event *)) kfree; 4988 } 4989 4990 crtc->primary->old_fb = crtc->primary->fb; 4991 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 4992 if (ret) { 4993 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 4994 spin_lock_irqsave(&dev->event_lock, flags); 4995 file_priv->event_space += sizeof(e->event); 4996 spin_unlock_irqrestore(&dev->event_lock, flags); 4997 kfree(e); 4998 } 4999 /* Keep the old fb, don't unref it. */ 5000 crtc->primary->old_fb = NULL; 5001 } else { 5002 /* 5003 * Warn if the driver hasn't properly updated the crtc->fb 5004 * field to reflect that the new framebuffer is now used. 5005 * Failing to do so will screw with the reference counting 5006 * on framebuffers. 5007 */ 5008 WARN_ON(crtc->primary->fb != fb); 5009 /* Unref only the old framebuffer. */ 5010 fb = NULL; 5011 } 5012 5013 out: 5014 if (fb) 5015 drm_framebuffer_unreference(fb); 5016 if (crtc->primary->old_fb) 5017 drm_framebuffer_unreference(crtc->primary->old_fb); 5018 crtc->primary->old_fb = NULL; 5019 drm_modeset_unlock_crtc(crtc); 5020 5021 return ret; 5022 } 5023 5024 /** 5025 * drm_mode_config_reset - call ->reset callbacks 5026 * @dev: drm device 5027 * 5028 * This functions calls all the crtc's, encoder's and connector's ->reset 5029 * callback. Drivers can use this in e.g. their driver load or resume code to 5030 * reset hardware and software state. 5031 */ 5032 void drm_mode_config_reset(struct drm_device *dev) 5033 { 5034 struct drm_crtc *crtc; 5035 struct drm_plane *plane; 5036 struct drm_encoder *encoder; 5037 struct drm_connector *connector; 5038 5039 list_for_each_entry(plane, &dev->mode_config.plane_list, head) 5040 if (plane->funcs->reset) 5041 plane->funcs->reset(plane); 5042 5043 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 5044 if (crtc->funcs->reset) 5045 crtc->funcs->reset(crtc); 5046 5047 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 5048 if (encoder->funcs->reset) 5049 encoder->funcs->reset(encoder); 5050 5051 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 5052 connector->status = connector_status_unknown; 5053 5054 if (connector->funcs->reset) 5055 connector->funcs->reset(connector); 5056 } 5057 } 5058 EXPORT_SYMBOL(drm_mode_config_reset); 5059 5060 /** 5061 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 5062 * @dev: DRM device 5063 * @data: ioctl data 5064 * @file_priv: DRM file info 5065 * 5066 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 5067 * TTM or something else entirely) and returns the resulting buffer handle. This 5068 * handle can then be wrapped up into a framebuffer modeset object. 5069 * 5070 * Note that userspace is not allowed to use such objects for render 5071 * acceleration - drivers must create their own private ioctls for such a use 5072 * case. 5073 * 5074 * Called by the user via ioctl. 5075 * 5076 * Returns: 5077 * Zero on success, negative errno on failure. 5078 */ 5079 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 5080 void *data, struct drm_file *file_priv) 5081 { 5082 struct drm_mode_create_dumb *args = data; 5083 u32 cpp, stride, size; 5084 5085 if (!dev->driver->dumb_create) 5086 return -ENOSYS; 5087 if (!args->width || !args->height || !args->bpp) 5088 return -EINVAL; 5089 5090 /* overflow checks for 32bit size calculations */ 5091 /* NOTE: DIV_ROUND_UP() can overflow */ 5092 cpp = DIV_ROUND_UP(args->bpp, 8); 5093 if (!cpp || cpp > 0xffffffffU / args->width) 5094 return -EINVAL; 5095 stride = cpp * args->width; 5096 if (args->height > 0xffffffffU / stride) 5097 return -EINVAL; 5098 5099 /* test for wrap-around */ 5100 size = args->height * stride; 5101 if (PAGE_ALIGN(size) == 0) 5102 return -EINVAL; 5103 5104 /* 5105 * handle, pitch and size are output parameters. Zero them out to 5106 * prevent drivers from accidentally using uninitialized data. Since 5107 * not all existing userspace is clearing these fields properly we 5108 * cannot reject IOCTL with garbage in them. 5109 */ 5110 args->handle = 0; 5111 args->pitch = 0; 5112 args->size = 0; 5113 5114 return dev->driver->dumb_create(file_priv, dev, args); 5115 } 5116 5117 /** 5118 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 5119 * @dev: DRM device 5120 * @data: ioctl data 5121 * @file_priv: DRM file info 5122 * 5123 * Allocate an offset in the drm device node's address space to be able to 5124 * memory map a dumb buffer. 5125 * 5126 * Called by the user via ioctl. 5127 * 5128 * Returns: 5129 * Zero on success, negative errno on failure. 5130 */ 5131 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 5132 void *data, struct drm_file *file_priv) 5133 { 5134 struct drm_mode_map_dumb *args = data; 5135 5136 /* call driver ioctl to get mmap offset */ 5137 if (!dev->driver->dumb_map_offset) 5138 return -ENOSYS; 5139 5140 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 5141 } 5142 5143 /** 5144 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 5145 * @dev: DRM device 5146 * @data: ioctl data 5147 * @file_priv: DRM file info 5148 * 5149 * This destroys the userspace handle for the given dumb backing storage buffer. 5150 * Since buffer objects must be reference counted in the kernel a buffer object 5151 * won't be immediately freed if a framebuffer modeset object still uses it. 5152 * 5153 * Called by the user via ioctl. 5154 * 5155 * Returns: 5156 * Zero on success, negative errno on failure. 5157 */ 5158 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 5159 void *data, struct drm_file *file_priv) 5160 { 5161 struct drm_mode_destroy_dumb *args = data; 5162 5163 if (!dev->driver->dumb_destroy) 5164 return -ENOSYS; 5165 5166 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 5167 } 5168 5169 /** 5170 * drm_fb_get_bpp_depth - get the bpp/depth values for format 5171 * @format: pixel format (DRM_FORMAT_*) 5172 * @depth: storage for the depth value 5173 * @bpp: storage for the bpp value 5174 * 5175 * This only supports RGB formats here for compat with code that doesn't use 5176 * pixel formats directly yet. 5177 */ 5178 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 5179 int *bpp) 5180 { 5181 switch (format) { 5182 case DRM_FORMAT_C8: 5183 case DRM_FORMAT_RGB332: 5184 case DRM_FORMAT_BGR233: 5185 *depth = 8; 5186 *bpp = 8; 5187 break; 5188 case DRM_FORMAT_XRGB1555: 5189 case DRM_FORMAT_XBGR1555: 5190 case DRM_FORMAT_RGBX5551: 5191 case DRM_FORMAT_BGRX5551: 5192 case DRM_FORMAT_ARGB1555: 5193 case DRM_FORMAT_ABGR1555: 5194 case DRM_FORMAT_RGBA5551: 5195 case DRM_FORMAT_BGRA5551: 5196 *depth = 15; 5197 *bpp = 16; 5198 break; 5199 case DRM_FORMAT_RGB565: 5200 case DRM_FORMAT_BGR565: 5201 *depth = 16; 5202 *bpp = 16; 5203 break; 5204 case DRM_FORMAT_RGB888: 5205 case DRM_FORMAT_BGR888: 5206 *depth = 24; 5207 *bpp = 24; 5208 break; 5209 case DRM_FORMAT_XRGB8888: 5210 case DRM_FORMAT_XBGR8888: 5211 case DRM_FORMAT_RGBX8888: 5212 case DRM_FORMAT_BGRX8888: 5213 *depth = 24; 5214 *bpp = 32; 5215 break; 5216 case DRM_FORMAT_XRGB2101010: 5217 case DRM_FORMAT_XBGR2101010: 5218 case DRM_FORMAT_RGBX1010102: 5219 case DRM_FORMAT_BGRX1010102: 5220 case DRM_FORMAT_ARGB2101010: 5221 case DRM_FORMAT_ABGR2101010: 5222 case DRM_FORMAT_RGBA1010102: 5223 case DRM_FORMAT_BGRA1010102: 5224 *depth = 30; 5225 *bpp = 32; 5226 break; 5227 case DRM_FORMAT_ARGB8888: 5228 case DRM_FORMAT_ABGR8888: 5229 case DRM_FORMAT_RGBA8888: 5230 case DRM_FORMAT_BGRA8888: 5231 *depth = 32; 5232 *bpp = 32; 5233 break; 5234 default: 5235 DRM_DEBUG_KMS("unsupported pixel format %s\n", 5236 drm_get_format_name(format)); 5237 *depth = 0; 5238 *bpp = 0; 5239 break; 5240 } 5241 } 5242 EXPORT_SYMBOL(drm_fb_get_bpp_depth); 5243 5244 /** 5245 * drm_format_num_planes - get the number of planes for format 5246 * @format: pixel format (DRM_FORMAT_*) 5247 * 5248 * Returns: 5249 * The number of planes used by the specified pixel format. 5250 */ 5251 int drm_format_num_planes(uint32_t format) 5252 { 5253 switch (format) { 5254 case DRM_FORMAT_YUV410: 5255 case DRM_FORMAT_YVU410: 5256 case DRM_FORMAT_YUV411: 5257 case DRM_FORMAT_YVU411: 5258 case DRM_FORMAT_YUV420: 5259 case DRM_FORMAT_YVU420: 5260 case DRM_FORMAT_YUV422: 5261 case DRM_FORMAT_YVU422: 5262 case DRM_FORMAT_YUV444: 5263 case DRM_FORMAT_YVU444: 5264 return 3; 5265 case DRM_FORMAT_NV12: 5266 case DRM_FORMAT_NV21: 5267 case DRM_FORMAT_NV16: 5268 case DRM_FORMAT_NV61: 5269 case DRM_FORMAT_NV24: 5270 case DRM_FORMAT_NV42: 5271 return 2; 5272 default: 5273 return 1; 5274 } 5275 } 5276 EXPORT_SYMBOL(drm_format_num_planes); 5277 5278 /** 5279 * drm_format_plane_cpp - determine the bytes per pixel value 5280 * @format: pixel format (DRM_FORMAT_*) 5281 * @plane: plane index 5282 * 5283 * Returns: 5284 * The bytes per pixel value for the specified plane. 5285 */ 5286 int drm_format_plane_cpp(uint32_t format, int plane) 5287 { 5288 unsigned int depth; 5289 int bpp; 5290 5291 if (plane >= drm_format_num_planes(format)) 5292 return 0; 5293 5294 switch (format) { 5295 case DRM_FORMAT_YUYV: 5296 case DRM_FORMAT_YVYU: 5297 case DRM_FORMAT_UYVY: 5298 case DRM_FORMAT_VYUY: 5299 return 2; 5300 case DRM_FORMAT_NV12: 5301 case DRM_FORMAT_NV21: 5302 case DRM_FORMAT_NV16: 5303 case DRM_FORMAT_NV61: 5304 case DRM_FORMAT_NV24: 5305 case DRM_FORMAT_NV42: 5306 return plane ? 2 : 1; 5307 case DRM_FORMAT_YUV410: 5308 case DRM_FORMAT_YVU410: 5309 case DRM_FORMAT_YUV411: 5310 case DRM_FORMAT_YVU411: 5311 case DRM_FORMAT_YUV420: 5312 case DRM_FORMAT_YVU420: 5313 case DRM_FORMAT_YUV422: 5314 case DRM_FORMAT_YVU422: 5315 case DRM_FORMAT_YUV444: 5316 case DRM_FORMAT_YVU444: 5317 return 1; 5318 default: 5319 drm_fb_get_bpp_depth(format, &depth, &bpp); 5320 return bpp >> 3; 5321 } 5322 } 5323 EXPORT_SYMBOL(drm_format_plane_cpp); 5324 5325 /** 5326 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 5327 * @format: pixel format (DRM_FORMAT_*) 5328 * 5329 * Returns: 5330 * The horizontal chroma subsampling factor for the 5331 * specified pixel format. 5332 */ 5333 int drm_format_horz_chroma_subsampling(uint32_t format) 5334 { 5335 switch (format) { 5336 case DRM_FORMAT_YUV411: 5337 case DRM_FORMAT_YVU411: 5338 case DRM_FORMAT_YUV410: 5339 case DRM_FORMAT_YVU410: 5340 return 4; 5341 case DRM_FORMAT_YUYV: 5342 case DRM_FORMAT_YVYU: 5343 case DRM_FORMAT_UYVY: 5344 case DRM_FORMAT_VYUY: 5345 case DRM_FORMAT_NV12: 5346 case DRM_FORMAT_NV21: 5347 case DRM_FORMAT_NV16: 5348 case DRM_FORMAT_NV61: 5349 case DRM_FORMAT_YUV422: 5350 case DRM_FORMAT_YVU422: 5351 case DRM_FORMAT_YUV420: 5352 case DRM_FORMAT_YVU420: 5353 return 2; 5354 default: 5355 return 1; 5356 } 5357 } 5358 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5359 5360 /** 5361 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5362 * @format: pixel format (DRM_FORMAT_*) 5363 * 5364 * Returns: 5365 * The vertical chroma subsampling factor for the 5366 * specified pixel format. 5367 */ 5368 int drm_format_vert_chroma_subsampling(uint32_t format) 5369 { 5370 switch (format) { 5371 case DRM_FORMAT_YUV410: 5372 case DRM_FORMAT_YVU410: 5373 return 4; 5374 case DRM_FORMAT_YUV420: 5375 case DRM_FORMAT_YVU420: 5376 case DRM_FORMAT_NV12: 5377 case DRM_FORMAT_NV21: 5378 return 2; 5379 default: 5380 return 1; 5381 } 5382 } 5383 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5384 5385 /** 5386 * drm_rotation_simplify() - Try to simplify the rotation 5387 * @rotation: Rotation to be simplified 5388 * @supported_rotations: Supported rotations 5389 * 5390 * Attempt to simplify the rotation to a form that is supported. 5391 * Eg. if the hardware supports everything except DRM_REFLECT_X 5392 * one could call this function like this: 5393 * 5394 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5395 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5396 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5397 * 5398 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5399 * transforms the hardware supports, this function may not 5400 * be able to produce a supported transform, so the caller should 5401 * check the result afterwards. 5402 */ 5403 unsigned int drm_rotation_simplify(unsigned int rotation, 5404 unsigned int supported_rotations) 5405 { 5406 if (rotation & ~supported_rotations) { 5407 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5408 rotation = (rotation & ~0xf) | BIT((ffs(rotation & 0xf) + 1) % 4); 5409 } 5410 5411 return rotation; 5412 } 5413 EXPORT_SYMBOL(drm_rotation_simplify); 5414 5415 /** 5416 * drm_mode_config_init - initialize DRM mode_configuration structure 5417 * @dev: DRM device 5418 * 5419 * Initialize @dev's mode_config structure, used for tracking the graphics 5420 * configuration of @dev. 5421 * 5422 * Since this initializes the modeset locks, no locking is possible. Which is no 5423 * problem, since this should happen single threaded at init time. It is the 5424 * driver's problem to ensure this guarantee. 5425 * 5426 */ 5427 void drm_mode_config_init(struct drm_device *dev) 5428 { 5429 mutex_init(&dev->mode_config.mutex); 5430 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5431 mutex_init(&dev->mode_config.idr_mutex); 5432 mutex_init(&dev->mode_config.fb_lock); 5433 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5434 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5435 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5436 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5437 INIT_LIST_HEAD(&dev->mode_config.property_list); 5438 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5439 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5440 idr_init(&dev->mode_config.crtc_idr); 5441 idr_init(&dev->mode_config.tile_idr); 5442 5443 drm_modeset_lock_all(dev); 5444 drm_mode_create_standard_properties(dev); 5445 drm_modeset_unlock_all(dev); 5446 5447 /* Just to be sure */ 5448 dev->mode_config.num_fb = 0; 5449 dev->mode_config.num_connector = 0; 5450 dev->mode_config.num_crtc = 0; 5451 dev->mode_config.num_encoder = 0; 5452 dev->mode_config.num_overlay_plane = 0; 5453 dev->mode_config.num_total_plane = 0; 5454 } 5455 EXPORT_SYMBOL(drm_mode_config_init); 5456 5457 /** 5458 * drm_mode_config_cleanup - free up DRM mode_config info 5459 * @dev: DRM device 5460 * 5461 * Free up all the connectors and CRTCs associated with this DRM device, then 5462 * free up the framebuffers and associated buffer objects. 5463 * 5464 * Note that since this /should/ happen single-threaded at driver/device 5465 * teardown time, no locking is required. It's the driver's job to ensure that 5466 * this guarantee actually holds true. 5467 * 5468 * FIXME: cleanup any dangling user buffer objects too 5469 */ 5470 void drm_mode_config_cleanup(struct drm_device *dev) 5471 { 5472 struct drm_connector *connector, *ot; 5473 struct drm_crtc *crtc, *ct; 5474 struct drm_encoder *encoder, *enct; 5475 struct drm_framebuffer *fb, *fbt; 5476 struct drm_property *property, *pt; 5477 struct drm_property_blob *blob, *bt; 5478 struct drm_plane *plane, *plt; 5479 5480 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5481 head) { 5482 encoder->funcs->destroy(encoder); 5483 } 5484 5485 list_for_each_entry_safe(connector, ot, 5486 &dev->mode_config.connector_list, head) { 5487 connector->funcs->destroy(connector); 5488 } 5489 5490 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5491 head) { 5492 drm_property_destroy(dev, property); 5493 } 5494 5495 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5496 head) { 5497 drm_property_destroy_blob(dev, blob); 5498 } 5499 5500 /* 5501 * Single-threaded teardown context, so it's not required to grab the 5502 * fb_lock to protect against concurrent fb_list access. Contrary, it 5503 * would actually deadlock with the drm_framebuffer_cleanup function. 5504 * 5505 * Also, if there are any framebuffers left, that's a driver leak now, 5506 * so politely WARN about this. 5507 */ 5508 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5509 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5510 drm_framebuffer_remove(fb); 5511 } 5512 5513 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5514 head) { 5515 plane->funcs->destroy(plane); 5516 } 5517 5518 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5519 crtc->funcs->destroy(crtc); 5520 } 5521 5522 idr_destroy(&dev->mode_config.tile_idr); 5523 idr_destroy(&dev->mode_config.crtc_idr); 5524 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5525 } 5526 EXPORT_SYMBOL(drm_mode_config_cleanup); 5527 5528 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5529 unsigned int supported_rotations) 5530 { 5531 static const struct drm_prop_enum_list props[] = { 5532 { DRM_ROTATE_0, "rotate-0" }, 5533 { DRM_ROTATE_90, "rotate-90" }, 5534 { DRM_ROTATE_180, "rotate-180" }, 5535 { DRM_ROTATE_270, "rotate-270" }, 5536 { DRM_REFLECT_X, "reflect-x" }, 5537 { DRM_REFLECT_Y, "reflect-y" }, 5538 }; 5539 5540 return drm_property_create_bitmask(dev, 0, "rotation", 5541 props, ARRAY_SIZE(props), 5542 supported_rotations); 5543 } 5544 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5545 5546 /** 5547 * DOC: Tile group 5548 * 5549 * Tile groups are used to represent tiled monitors with a unique 5550 * integer identifier. Tiled monitors using DisplayID v1.3 have 5551 * a unique 8-byte handle, we store this in a tile group, so we 5552 * have a common identifier for all tiles in a monitor group. 5553 */ 5554 static void drm_tile_group_free(struct kref *kref) 5555 { 5556 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5557 struct drm_device *dev = tg->dev; 5558 mutex_lock(&dev->mode_config.idr_mutex); 5559 idr_remove(&dev->mode_config.tile_idr, tg->id); 5560 mutex_unlock(&dev->mode_config.idr_mutex); 5561 kfree(tg); 5562 } 5563 5564 /** 5565 * drm_mode_put_tile_group - drop a reference to a tile group. 5566 * @dev: DRM device 5567 * @tg: tile group to drop reference to. 5568 * 5569 * drop reference to tile group and free if 0. 5570 */ 5571 void drm_mode_put_tile_group(struct drm_device *dev, 5572 struct drm_tile_group *tg) 5573 { 5574 kref_put(&tg->refcount, drm_tile_group_free); 5575 } 5576 5577 /** 5578 * drm_mode_get_tile_group - get a reference to an existing tile group 5579 * @dev: DRM device 5580 * @topology: 8-bytes unique per monitor. 5581 * 5582 * Use the unique bytes to get a reference to an existing tile group. 5583 * 5584 * RETURNS: 5585 * tile group or NULL if not found. 5586 */ 5587 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 5588 char topology[8]) 5589 { 5590 struct drm_tile_group *tg; 5591 int id; 5592 mutex_lock(&dev->mode_config.idr_mutex); 5593 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 5594 if (!memcmp(tg->group_data, topology, 8)) { 5595 if (!kref_get_unless_zero(&tg->refcount)) 5596 tg = NULL; 5597 mutex_unlock(&dev->mode_config.idr_mutex); 5598 return tg; 5599 } 5600 } 5601 mutex_unlock(&dev->mode_config.idr_mutex); 5602 return NULL; 5603 } 5604 EXPORT_SYMBOL(drm_mode_get_tile_group); 5605 5606 /** 5607 * drm_mode_create_tile_group - create a tile group from a displayid description 5608 * @dev: DRM device 5609 * @topology: 8-bytes unique per monitor. 5610 * 5611 * Create a tile group for the unique monitor, and get a unique 5612 * identifier for the tile group. 5613 * 5614 * RETURNS: 5615 * new tile group or error. 5616 */ 5617 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 5618 char topology[8]) 5619 { 5620 struct drm_tile_group *tg; 5621 int ret; 5622 5623 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 5624 if (!tg) 5625 return ERR_PTR(-ENOMEM); 5626 5627 kref_init(&tg->refcount); 5628 memcpy(tg->group_data, topology, 8); 5629 tg->dev = dev; 5630 5631 mutex_lock(&dev->mode_config.idr_mutex); 5632 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 5633 if (ret >= 0) { 5634 tg->id = ret; 5635 } else { 5636 kfree(tg); 5637 tg = ERR_PTR(ret); 5638 } 5639 5640 mutex_unlock(&dev->mode_config.idr_mutex); 5641 return tg; 5642 } 5643 EXPORT_SYMBOL(drm_mode_create_tile_group); 5644