1 /* 2 * Copyright (c) 2006-2008 Intel Corporation 3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 4 * Copyright (c) 2008 Red Hat Inc. 5 * 6 * DRM core CRTC related functions 7 * 8 * Permission to use, copy, modify, distribute, and sell this software and its 9 * documentation for any purpose is hereby granted without fee, provided that 10 * the above copyright notice appear in all copies and that both that copyright 11 * notice and this permission notice appear in supporting documentation, and 12 * that the name of the copyright holders not be used in advertising or 13 * publicity pertaining to distribution of the software without specific, 14 * written prior permission. The copyright holders make no representations 15 * about the suitability of this software for any purpose. It is provided "as 16 * is" without express or implied warranty. 17 * 18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 24 * OF THIS SOFTWARE. 25 * 26 * Authors: 27 * Keith Packard 28 * Eric Anholt <eric@anholt.net> 29 * Dave Airlie <airlied@linux.ie> 30 * Jesse Barnes <jesse.barnes@intel.com> 31 */ 32 #include <linux/ctype.h> 33 #include <linux/list.h> 34 #include <linux/export.h> 35 #include <drm/drmP.h> 36 #include <drm/drm_crtc.h> 37 #include <drm/drm_edid.h> 38 #include <uapi_drm/drm_fourcc.h> 39 #include <linux/slab.h> 40 #include <drm/drm_modeset_lock.h> 41 #include <drm/drm_atomic.h> 42 43 #include "drm_crtc_internal.h" 44 #include "drm_internal.h" 45 46 static struct drm_framebuffer * 47 internal_framebuffer_create(struct drm_device *dev, 48 struct drm_mode_fb_cmd2 *r, 49 struct drm_file *file_priv); 50 51 /* Avoid boilerplate. I'm tired of typing. */ 52 #define DRM_ENUM_NAME_FN(fnname, list) \ 53 const char *fnname(int val) \ 54 { \ 55 int i; \ 56 for (i = 0; i < ARRAY_SIZE(list); i++) { \ 57 if (list[i].type == val) \ 58 return list[i].name; \ 59 } \ 60 return "(unknown)"; \ 61 } 62 63 /* 64 * Global properties 65 */ 66 static const struct drm_prop_enum_list drm_dpms_enum_list[] = { 67 { DRM_MODE_DPMS_ON, "On" }, 68 { DRM_MODE_DPMS_STANDBY, "Standby" }, 69 { DRM_MODE_DPMS_SUSPEND, "Suspend" }, 70 { DRM_MODE_DPMS_OFF, "Off" } 71 }; 72 73 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) 74 75 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { 76 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 77 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 78 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 79 }; 80 81 /* 82 * Optional properties 83 */ 84 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { 85 { DRM_MODE_SCALE_NONE, "None" }, 86 { DRM_MODE_SCALE_FULLSCREEN, "Full" }, 87 { DRM_MODE_SCALE_CENTER, "Center" }, 88 { DRM_MODE_SCALE_ASPECT, "Full aspect" }, 89 }; 90 91 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { 92 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, 93 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, 94 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, 95 }; 96 97 /* 98 * Non-global properties, but "required" for certain connectors. 99 */ 100 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { 101 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 102 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 103 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 104 }; 105 106 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) 107 108 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { 109 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 110 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 111 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 112 }; 113 114 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, 115 drm_dvi_i_subconnector_enum_list) 116 117 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { 118 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 119 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 120 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 121 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 122 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 123 }; 124 125 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) 126 127 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { 128 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 129 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 130 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 131 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 132 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 133 }; 134 135 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, 136 drm_tv_subconnector_enum_list) 137 138 static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = { 139 { DRM_MODE_DIRTY_OFF, "Off" }, 140 { DRM_MODE_DIRTY_ON, "On" }, 141 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" }, 142 }; 143 144 struct drm_conn_prop_enum_list { 145 int type; 146 const char *name; 147 int count; 148 }; 149 150 /* 151 * Connector and encoder types. 152 */ 153 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { 154 { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, 155 { DRM_MODE_CONNECTOR_VGA, "VGA" }, 156 { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, 157 { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, 158 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, 159 { DRM_MODE_CONNECTOR_Composite, "Composite" }, 160 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, 161 { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, 162 { DRM_MODE_CONNECTOR_Component, "Component" }, 163 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, 164 { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, 165 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, 166 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, 167 { DRM_MODE_CONNECTOR_TV, "TV" }, 168 { DRM_MODE_CONNECTOR_eDP, "eDP" }, 169 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, 170 { DRM_MODE_CONNECTOR_DSI, "DSI" }, 171 }; 172 173 static const struct drm_prop_enum_list drm_encoder_enum_list[] = { 174 { DRM_MODE_ENCODER_NONE, "None" }, 175 { DRM_MODE_ENCODER_DAC, "DAC" }, 176 { DRM_MODE_ENCODER_TMDS, "TMDS" }, 177 { DRM_MODE_ENCODER_LVDS, "LVDS" }, 178 { DRM_MODE_ENCODER_TVDAC, "TV" }, 179 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" }, 180 { DRM_MODE_ENCODER_DSI, "DSI" }, 181 { DRM_MODE_ENCODER_DPMST, "DP MST" }, 182 }; 183 184 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { 185 { SubPixelUnknown, "Unknown" }, 186 { SubPixelHorizontalRGB, "Horizontal RGB" }, 187 { SubPixelHorizontalBGR, "Horizontal BGR" }, 188 { SubPixelVerticalRGB, "Vertical RGB" }, 189 { SubPixelVerticalBGR, "Vertical BGR" }, 190 { SubPixelNone, "None" }, 191 }; 192 193 void drm_connector_ida_init(void) 194 { 195 #if 0 196 int i; 197 198 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 199 ida_init(&drm_connector_enum_list[i].ida); 200 #endif 201 } 202 203 void drm_connector_ida_destroy(void) 204 { 205 #if 0 206 int i; 207 208 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 209 ida_destroy(&drm_connector_enum_list[i].ida); 210 #endif 211 } 212 213 /** 214 * drm_get_connector_status_name - return a string for connector status 215 * @status: connector status to compute name of 216 * 217 * In contrast to the other drm_get_*_name functions this one here returns a 218 * const pointer and hence is threadsafe. 219 */ 220 const char *drm_get_connector_status_name(enum drm_connector_status status) 221 { 222 if (status == connector_status_connected) 223 return "connected"; 224 else if (status == connector_status_disconnected) 225 return "disconnected"; 226 else 227 return "unknown"; 228 } 229 EXPORT_SYMBOL(drm_get_connector_status_name); 230 231 /** 232 * drm_get_subpixel_order_name - return a string for a given subpixel enum 233 * @order: enum of subpixel_order 234 * 235 * Note you could abuse this and return something out of bounds, but that 236 * would be a caller error. No unscrubbed user data should make it here. 237 */ 238 const char *drm_get_subpixel_order_name(enum subpixel_order order) 239 { 240 return drm_subpixel_enum_list[order].name; 241 } 242 EXPORT_SYMBOL(drm_get_subpixel_order_name); 243 244 static char printable_char(int c) 245 { 246 return isascii(c) && isprint(c) ? c : '?'; 247 } 248 249 /** 250 * drm_get_format_name - return a string for drm fourcc format 251 * @format: format to compute name of 252 * 253 * Note that the buffer used by this function is globally shared and owned by 254 * the function itself. 255 * 256 * FIXME: This isn't really multithreading safe. 257 */ 258 const char *drm_get_format_name(uint32_t format) 259 { 260 static char buf[32]; 261 262 ksnprintf(buf, sizeof(buf), 263 "%c%c%c%c %s-endian (0x%08x)", 264 printable_char(format & 0xff), 265 printable_char((format >> 8) & 0xff), 266 printable_char((format >> 16) & 0xff), 267 printable_char((format >> 24) & 0x7f), 268 format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little", 269 format); 270 271 return buf; 272 } 273 EXPORT_SYMBOL(drm_get_format_name); 274 275 /* 276 * Internal function to assign a slot in the object idr and optionally 277 * register the object into the idr. 278 */ 279 static int drm_mode_object_get_reg(struct drm_device *dev, 280 struct drm_mode_object *obj, 281 uint32_t obj_type, 282 bool register_obj) 283 { 284 int ret; 285 286 mutex_lock(&dev->mode_config.idr_mutex); 287 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); 288 if (ret >= 0) { 289 /* 290 * Set up the object linking under the protection of the idr 291 * lock so that other users can't see inconsistent state. 292 */ 293 obj->id = ret; 294 obj->type = obj_type; 295 } 296 mutex_unlock(&dev->mode_config.idr_mutex); 297 298 return ret < 0 ? ret : 0; 299 } 300 301 /** 302 * drm_mode_object_get - allocate a new modeset identifier 303 * @dev: DRM device 304 * @obj: object pointer, used to generate unique ID 305 * @obj_type: object type 306 * 307 * Create a unique identifier based on @ptr in @dev's identifier space. Used 308 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix 309 * modeset identifiers are _not_ reference counted. Hence don't use this for 310 * reference counted modeset objects like framebuffers. 311 * 312 * Returns: 313 * New unique (relative to other objects in @dev) integer identifier for the 314 * object. 315 */ 316 int drm_mode_object_get(struct drm_device *dev, 317 struct drm_mode_object *obj, uint32_t obj_type) 318 { 319 return drm_mode_object_get_reg(dev, obj, obj_type, true); 320 } 321 322 static void drm_mode_object_register(struct drm_device *dev, 323 struct drm_mode_object *obj) 324 { 325 mutex_lock(&dev->mode_config.idr_mutex); 326 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); 327 mutex_unlock(&dev->mode_config.idr_mutex); 328 } 329 330 /** 331 * drm_mode_object_put - free a modeset identifer 332 * @dev: DRM device 333 * @object: object to free 334 * 335 * Free @id from @dev's unique identifier pool. Note that despite the _get 336 * postfix modeset identifiers are _not_ reference counted. Hence don't use this 337 * for reference counted modeset objects like framebuffers. 338 */ 339 void drm_mode_object_put(struct drm_device *dev, 340 struct drm_mode_object *object) 341 { 342 mutex_lock(&dev->mode_config.idr_mutex); 343 idr_remove(&dev->mode_config.crtc_idr, object->id); 344 mutex_unlock(&dev->mode_config.idr_mutex); 345 } 346 347 static struct drm_mode_object *_object_find(struct drm_device *dev, 348 uint32_t id, uint32_t type) 349 { 350 struct drm_mode_object *obj = NULL; 351 352 mutex_lock(&dev->mode_config.idr_mutex); 353 obj = idr_find(&dev->mode_config.crtc_idr, id); 354 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) 355 obj = NULL; 356 if (obj && obj->id != id) 357 obj = NULL; 358 /* don't leak out unref'd fb's */ 359 if (obj && (obj->type == DRM_MODE_OBJECT_FB)) 360 obj = NULL; 361 mutex_unlock(&dev->mode_config.idr_mutex); 362 363 return obj; 364 } 365 366 /** 367 * drm_mode_object_find - look up a drm object with static lifetime 368 * @dev: drm device 369 * @id: id of the mode object 370 * @type: type of the mode object 371 * 372 * Note that framebuffers cannot be looked up with this functions - since those 373 * are reference counted, they need special treatment. Even with 374 * DRM_MODE_OBJECT_ANY (although that will simply return NULL 375 * rather than WARN_ON()). 376 */ 377 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, 378 uint32_t id, uint32_t type) 379 { 380 struct drm_mode_object *obj = NULL; 381 382 /* Framebuffers are reference counted and need their own lookup 383 * function.*/ 384 WARN_ON(type == DRM_MODE_OBJECT_FB); 385 obj = _object_find(dev, id, type); 386 return obj; 387 } 388 EXPORT_SYMBOL(drm_mode_object_find); 389 390 /** 391 * drm_framebuffer_init - initialize a framebuffer 392 * @dev: DRM device 393 * @fb: framebuffer to be initialized 394 * @funcs: ... with these functions 395 * 396 * Allocates an ID for the framebuffer's parent mode object, sets its mode 397 * functions & device file and adds it to the master fd list. 398 * 399 * IMPORTANT: 400 * This functions publishes the fb and makes it available for concurrent access 401 * by other users. Which means by this point the fb _must_ be fully set up - 402 * since all the fb attributes are invariant over its lifetime, no further 403 * locking but only correct reference counting is required. 404 * 405 * Returns: 406 * Zero on success, error code on failure. 407 */ 408 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, 409 const struct drm_framebuffer_funcs *funcs) 410 { 411 int ret; 412 413 mutex_lock(&dev->mode_config.fb_lock); 414 kref_init(&fb->refcount); 415 INIT_LIST_HEAD(&fb->filp_head); 416 fb->dev = dev; 417 fb->funcs = funcs; 418 419 ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB); 420 if (ret) 421 goto out; 422 423 dev->mode_config.num_fb++; 424 list_add(&fb->head, &dev->mode_config.fb_list); 425 out: 426 mutex_unlock(&dev->mode_config.fb_lock); 427 428 return 0; 429 } 430 EXPORT_SYMBOL(drm_framebuffer_init); 431 432 /* dev->mode_config.fb_lock must be held! */ 433 static void __drm_framebuffer_unregister(struct drm_device *dev, 434 struct drm_framebuffer *fb) 435 { 436 mutex_lock(&dev->mode_config.idr_mutex); 437 idr_remove(&dev->mode_config.crtc_idr, fb->base.id); 438 mutex_unlock(&dev->mode_config.idr_mutex); 439 440 fb->base.id = 0; 441 } 442 443 static void drm_framebuffer_free(struct kref *kref) 444 { 445 struct drm_framebuffer *fb = 446 container_of(kref, struct drm_framebuffer, refcount); 447 struct drm_device *dev = fb->dev; 448 449 /* 450 * The lookup idr holds a weak reference, which has not necessarily been 451 * removed at this point. Check for that. 452 */ 453 mutex_lock(&dev->mode_config.fb_lock); 454 if (fb->base.id) { 455 /* Mark fb as reaped and drop idr ref. */ 456 __drm_framebuffer_unregister(dev, fb); 457 } 458 mutex_unlock(&dev->mode_config.fb_lock); 459 460 fb->funcs->destroy(fb); 461 } 462 463 static struct drm_framebuffer *__drm_framebuffer_lookup(struct drm_device *dev, 464 uint32_t id) 465 { 466 struct drm_mode_object *obj = NULL; 467 struct drm_framebuffer *fb; 468 469 mutex_lock(&dev->mode_config.idr_mutex); 470 obj = idr_find(&dev->mode_config.crtc_idr, id); 471 if (!obj || (obj->type != DRM_MODE_OBJECT_FB) || (obj->id != id)) 472 fb = NULL; 473 else 474 fb = obj_to_fb(obj); 475 mutex_unlock(&dev->mode_config.idr_mutex); 476 477 return fb; 478 } 479 480 /** 481 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference 482 * @dev: drm device 483 * @id: id of the fb object 484 * 485 * If successful, this grabs an additional reference to the framebuffer - 486 * callers need to make sure to eventually unreference the returned framebuffer 487 * again, using @drm_framebuffer_unreference. 488 */ 489 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, 490 uint32_t id) 491 { 492 struct drm_framebuffer *fb; 493 494 mutex_lock(&dev->mode_config.fb_lock); 495 fb = __drm_framebuffer_lookup(dev, id); 496 if (fb) { 497 if (!kref_get_unless_zero(&fb->refcount)) 498 fb = NULL; 499 } 500 mutex_unlock(&dev->mode_config.fb_lock); 501 502 return fb; 503 } 504 EXPORT_SYMBOL(drm_framebuffer_lookup); 505 506 /** 507 * drm_framebuffer_unreference - unref a framebuffer 508 * @fb: framebuffer to unref 509 * 510 * This functions decrements the fb's refcount and frees it if it drops to zero. 511 */ 512 void drm_framebuffer_unreference(struct drm_framebuffer *fb) 513 { 514 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 515 kref_put(&fb->refcount, drm_framebuffer_free); 516 } 517 EXPORT_SYMBOL(drm_framebuffer_unreference); 518 519 /** 520 * drm_framebuffer_reference - incr the fb refcnt 521 * @fb: framebuffer 522 * 523 * This functions increments the fb's refcount. 524 */ 525 void drm_framebuffer_reference(struct drm_framebuffer *fb) 526 { 527 DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount)); 528 kref_get(&fb->refcount); 529 } 530 EXPORT_SYMBOL(drm_framebuffer_reference); 531 532 /** 533 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr 534 * @fb: fb to unregister 535 * 536 * Drivers need to call this when cleaning up driver-private framebuffers, e.g. 537 * those used for fbdev. Note that the caller must hold a reference of it's own, 538 * i.e. the object may not be destroyed through this call (since it'll lead to a 539 * locking inversion). 540 */ 541 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) 542 { 543 struct drm_device *dev = fb->dev; 544 545 mutex_lock(&dev->mode_config.fb_lock); 546 /* Mark fb as reaped and drop idr ref. */ 547 __drm_framebuffer_unregister(dev, fb); 548 mutex_unlock(&dev->mode_config.fb_lock); 549 } 550 EXPORT_SYMBOL(drm_framebuffer_unregister_private); 551 552 /** 553 * drm_framebuffer_cleanup - remove a framebuffer object 554 * @fb: framebuffer to remove 555 * 556 * Cleanup framebuffer. This function is intended to be used from the drivers 557 * ->destroy callback. It can also be used to clean up driver private 558 * framebuffers embedded into a larger structure. 559 * 560 * Note that this function does not remove the fb from active usuage - if it is 561 * still used anywhere, hilarity can ensue since userspace could call getfb on 562 * the id and get back -EINVAL. Obviously no concern at driver unload time. 563 * 564 * Also, the framebuffer will not be removed from the lookup idr - for 565 * user-created framebuffers this will happen in in the rmfb ioctl. For 566 * driver-private objects (e.g. for fbdev) drivers need to explicitly call 567 * drm_framebuffer_unregister_private. 568 */ 569 void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 570 { 571 struct drm_device *dev = fb->dev; 572 573 mutex_lock(&dev->mode_config.fb_lock); 574 list_del(&fb->head); 575 dev->mode_config.num_fb--; 576 mutex_unlock(&dev->mode_config.fb_lock); 577 } 578 EXPORT_SYMBOL(drm_framebuffer_cleanup); 579 580 /** 581 * drm_framebuffer_remove - remove and unreference a framebuffer object 582 * @fb: framebuffer to remove 583 * 584 * Scans all the CRTCs and planes in @dev's mode_config. If they're 585 * using @fb, removes it, setting it to NULL. Then drops the reference to the 586 * passed-in framebuffer. Might take the modeset locks. 587 * 588 * Note that this function optimizes the cleanup away if the caller holds the 589 * last reference to the framebuffer. It is also guaranteed to not take the 590 * modeset locks in this case. 591 */ 592 void drm_framebuffer_remove(struct drm_framebuffer *fb) 593 { 594 struct drm_device *dev = fb->dev; 595 struct drm_crtc *crtc; 596 struct drm_plane *plane; 597 struct drm_mode_set set; 598 int ret; 599 600 WARN_ON(!list_empty(&fb->filp_head)); 601 602 /* 603 * drm ABI mandates that we remove any deleted framebuffers from active 604 * useage. But since most sane clients only remove framebuffers they no 605 * longer need, try to optimize this away. 606 * 607 * Since we're holding a reference ourselves, observing a refcount of 1 608 * means that we're the last holder and can skip it. Also, the refcount 609 * can never increase from 1 again, so we don't need any barriers or 610 * locks. 611 * 612 * Note that userspace could try to race with use and instate a new 613 * usage _after_ we've cleared all current ones. End result will be an 614 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot 615 * in this manner. 616 */ 617 if (atomic_read(&fb->refcount.refcount) > 1) { 618 drm_modeset_lock_all(dev); 619 /* remove from any CRTC */ 620 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { 621 if (crtc->primary->fb == fb) { 622 /* should turn off the crtc */ 623 memset(&set, 0, sizeof(struct drm_mode_set)); 624 set.crtc = crtc; 625 set.fb = NULL; 626 ret = drm_mode_set_config_internal(&set); 627 if (ret) 628 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); 629 } 630 } 631 632 list_for_each_entry(plane, &dev->mode_config.plane_list, head) { 633 if (plane->fb == fb) 634 drm_plane_force_disable(plane); 635 } 636 drm_modeset_unlock_all(dev); 637 } 638 639 drm_framebuffer_unreference(fb); 640 } 641 EXPORT_SYMBOL(drm_framebuffer_remove); 642 643 DEFINE_WW_CLASS(crtc_ww_class); 644 645 /** 646 * drm_crtc_init_with_planes - Initialise a new CRTC object with 647 * specified primary and cursor planes. 648 * @dev: DRM device 649 * @crtc: CRTC object to init 650 * @primary: Primary plane for CRTC 651 * @cursor: Cursor plane for CRTC 652 * @funcs: callbacks for the new CRTC 653 * 654 * Inits a new object created as base part of a driver crtc object. 655 * 656 * Returns: 657 * Zero on success, error code on failure. 658 */ 659 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 660 struct drm_plane *primary, 661 struct drm_plane *cursor, 662 const struct drm_crtc_funcs *funcs) 663 { 664 struct drm_mode_config *config = &dev->mode_config; 665 int ret; 666 667 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); 668 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); 669 670 crtc->dev = dev; 671 crtc->funcs = funcs; 672 crtc->invert_dimensions = false; 673 674 drm_modeset_lock_init(&crtc->mutex); 675 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 676 if (ret) 677 goto out; 678 679 crtc->base.properties = &crtc->properties; 680 681 list_add_tail(&crtc->head, &config->crtc_list); 682 config->num_crtc++; 683 684 crtc->primary = primary; 685 crtc->cursor = cursor; 686 if (primary) 687 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 688 if (cursor) 689 cursor->possible_crtcs = 1 << drm_crtc_index(crtc); 690 691 out: 692 693 return ret; 694 } 695 EXPORT_SYMBOL(drm_crtc_init_with_planes); 696 697 /** 698 * drm_crtc_cleanup - Clean up the core crtc usage 699 * @crtc: CRTC to cleanup 700 * 701 * This function cleans up @crtc and removes it from the DRM mode setting 702 * core. Note that the function does *not* free the crtc structure itself, 703 * this is the responsibility of the caller. 704 */ 705 void drm_crtc_cleanup(struct drm_crtc *crtc) 706 { 707 struct drm_device *dev = crtc->dev; 708 709 kfree(crtc->gamma_store); 710 crtc->gamma_store = NULL; 711 712 drm_modeset_lock_fini(&crtc->mutex); 713 714 drm_mode_object_put(dev, &crtc->base); 715 list_del(&crtc->head); 716 dev->mode_config.num_crtc--; 717 718 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); 719 if (crtc->state && crtc->funcs->atomic_destroy_state) 720 crtc->funcs->atomic_destroy_state(crtc, crtc->state); 721 722 memset(crtc, 0, sizeof(*crtc)); 723 } 724 EXPORT_SYMBOL(drm_crtc_cleanup); 725 726 /** 727 * drm_crtc_index - find the index of a registered CRTC 728 * @crtc: CRTC to find index for 729 * 730 * Given a registered CRTC, return the index of that CRTC within a DRM 731 * device's list of CRTCs. 732 */ 733 unsigned int drm_crtc_index(struct drm_crtc *crtc) 734 { 735 unsigned int index = 0; 736 struct drm_crtc *tmp; 737 738 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { 739 if (tmp == crtc) 740 return index; 741 742 index++; 743 } 744 745 BUG(); 746 } 747 EXPORT_SYMBOL(drm_crtc_index); 748 749 /* 750 * drm_mode_remove - remove and free a mode 751 * @connector: connector list to modify 752 * @mode: mode to remove 753 * 754 * Remove @mode from @connector's mode list, then free it. 755 */ 756 static void drm_mode_remove(struct drm_connector *connector, 757 struct drm_display_mode *mode) 758 { 759 list_del(&mode->head); 760 drm_mode_destroy(connector->dev, mode); 761 } 762 763 /** 764 * drm_display_info_set_bus_formats - set the supported bus formats 765 * @info: display info to store bus formats in 766 * @fmts: array containing the supported bus formats 767 * @nfmts: the number of entries in the fmts array 768 * 769 * Store the supported bus formats in display info structure. 770 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for 771 * a full list of available formats. 772 */ 773 int drm_display_info_set_bus_formats(struct drm_display_info *info, 774 const u32 *formats, 775 unsigned int num_formats) 776 { 777 u32 *fmts = NULL; 778 779 if (!formats && num_formats) 780 return -EINVAL; 781 782 if (formats && num_formats) { 783 fmts = kmemdup(formats, sizeof(*formats) * num_formats, 784 GFP_KERNEL); 785 if (!fmts) 786 return -ENOMEM; 787 } 788 789 kfree(info->bus_formats); 790 info->bus_formats = fmts; 791 info->num_bus_formats = num_formats; 792 793 return 0; 794 } 795 EXPORT_SYMBOL(drm_display_info_set_bus_formats); 796 797 /** 798 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 799 * @connector: connector to quwery 800 * 801 * The kernel supports per-connector configration of its consoles through 802 * use of the video= parameter. This function parses that option and 803 * extracts the user's specified mode (or enable/disable status) for a 804 * particular connector. This is typically only used during the early fbdev 805 * setup. 806 */ 807 static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 808 { 809 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 810 char *option = NULL; 811 812 if (fb_get_options(connector->name, &option)) 813 return; 814 815 if (!drm_mode_parse_command_line_for_connector(option, 816 connector, 817 mode)) 818 return; 819 820 if (mode->force) { 821 const char *s; 822 823 switch (mode->force) { 824 case DRM_FORCE_OFF: 825 s = "OFF"; 826 break; 827 case DRM_FORCE_ON_DIGITAL: 828 s = "ON - dig"; 829 break; 830 default: 831 case DRM_FORCE_ON: 832 s = "ON"; 833 break; 834 } 835 836 DRM_INFO("forcing %s connector %s\n", connector->name, s); 837 connector->force = mode->force; 838 } 839 840 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 841 connector->name, 842 mode->xres, mode->yres, 843 mode->refresh_specified ? mode->refresh : 60, 844 mode->rb ? " reduced blanking" : "", 845 mode->margins ? " with margins" : "", 846 mode->interlace ? " interlaced" : ""); 847 } 848 849 /** 850 * drm_connector_init - Init a preallocated connector 851 * @dev: DRM device 852 * @connector: the connector to init 853 * @funcs: callbacks for this connector 854 * @connector_type: user visible type of the connector 855 * 856 * Initialises a preallocated connector. Connectors should be 857 * subclassed as part of driver connector objects. 858 * 859 * Returns: 860 * Zero on success, error code on failure. 861 */ 862 int drm_connector_init(struct drm_device *dev, 863 struct drm_connector *connector, 864 const struct drm_connector_funcs *funcs, 865 int connector_type) 866 { 867 struct drm_mode_config *config = &dev->mode_config; 868 int ret; 869 870 drm_modeset_lock_all(dev); 871 872 ret = drm_mode_object_get(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR); 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 ++drm_connector_enum_list[connector_type].count; /* TODO */ 882 if (connector->connector_type_id < 0) { 883 ret = connector->connector_type_id; 884 goto out_put; 885 } 886 connector->name = 887 drm_asprintf(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 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 944 drm_mode_remove(connector, mode); 945 946 list_for_each_entry_safe(mode, t, &connector->modes, head) 947 drm_mode_remove(connector, mode); 948 949 kfree(connector->display_info.bus_formats); 950 drm_mode_object_put(dev, &connector->base); 951 kfree(connector->name); 952 connector->name = NULL; 953 list_del(&connector->head); 954 dev->mode_config.num_connector--; 955 956 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 957 if (connector->state && connector->funcs->atomic_destroy_state) 958 connector->funcs->atomic_destroy_state(connector, 959 connector->state); 960 961 memset(connector, 0, sizeof(*connector)); 962 } 963 EXPORT_SYMBOL(drm_connector_cleanup); 964 965 /** 966 * drm_connector_index - find the index of a registered connector 967 * @connector: connector to find index for 968 * 969 * Given a registered connector, return the index of that connector within a DRM 970 * device's list of connectors. 971 */ 972 unsigned int drm_connector_index(struct drm_connector *connector) 973 { 974 unsigned int index = 0; 975 struct drm_connector *tmp; 976 struct drm_mode_config *config = &connector->dev->mode_config; 977 978 WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); 979 980 list_for_each_entry(tmp, &connector->dev->mode_config.connector_list, head) { 981 if (tmp == connector) 982 return index; 983 984 index++; 985 } 986 987 BUG(); 988 } 989 EXPORT_SYMBOL(drm_connector_index); 990 991 /** 992 * drm_connector_register - register a connector 993 * @connector: the connector to register 994 * 995 * Register userspace interfaces for a connector 996 * 997 * Returns: 998 * Zero on success, error code on failure. 999 */ 1000 int drm_connector_register(struct drm_connector *connector) 1001 { 1002 int ret; 1003 1004 drm_mode_object_register(connector->dev, &connector->base); 1005 1006 ret = drm_sysfs_connector_add(connector); 1007 if (ret) 1008 return ret; 1009 1010 ret = drm_debugfs_connector_add(connector); 1011 if (ret) { 1012 drm_sysfs_connector_remove(connector); 1013 return ret; 1014 } 1015 1016 return 0; 1017 } 1018 EXPORT_SYMBOL(drm_connector_register); 1019 1020 /** 1021 * drm_connector_unregister - unregister a connector 1022 * @connector: the connector to unregister 1023 * 1024 * Unregister userspace interfaces for a connector 1025 */ 1026 void drm_connector_unregister(struct drm_connector *connector) 1027 { 1028 drm_sysfs_connector_remove(connector); 1029 #if 0 1030 drm_debugfs_connector_remove(connector); 1031 #endif 1032 } 1033 EXPORT_SYMBOL(drm_connector_unregister); 1034 1035 1036 /** 1037 * drm_connector_unplug_all - unregister connector userspace interfaces 1038 * @dev: drm device 1039 * 1040 * This function unregisters all connector userspace interfaces in sysfs. Should 1041 * be call when the device is disconnected, e.g. from an usb driver's 1042 * ->disconnect callback. 1043 */ 1044 void drm_connector_unplug_all(struct drm_device *dev) 1045 { 1046 struct drm_connector *connector; 1047 1048 /* taking the mode config mutex ends up in a clash with sysfs */ 1049 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1050 drm_connector_unregister(connector); 1051 1052 } 1053 EXPORT_SYMBOL(drm_connector_unplug_all); 1054 1055 /** 1056 * drm_encoder_init - Init a preallocated encoder 1057 * @dev: drm device 1058 * @encoder: the encoder to init 1059 * @funcs: callbacks for this encoder 1060 * @encoder_type: user visible type of the encoder 1061 * 1062 * Initialises a preallocated encoder. Encoder should be 1063 * subclassed as part of driver encoder objects. 1064 * 1065 * Returns: 1066 * Zero on success, error code on failure. 1067 */ 1068 int drm_encoder_init(struct drm_device *dev, 1069 struct drm_encoder *encoder, 1070 const struct drm_encoder_funcs *funcs, 1071 int encoder_type) 1072 { 1073 int ret; 1074 1075 drm_modeset_lock_all(dev); 1076 1077 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1078 if (ret) 1079 goto out_unlock; 1080 1081 encoder->dev = dev; 1082 encoder->encoder_type = encoder_type; 1083 encoder->funcs = funcs; 1084 encoder->name = drm_asprintf(GFP_KERNEL, "%s-%d", 1085 drm_encoder_enum_list[encoder_type].name, 1086 encoder->base.id); 1087 if (!encoder->name) { 1088 ret = -ENOMEM; 1089 goto out_put; 1090 } 1091 1092 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1093 dev->mode_config.num_encoder++; 1094 1095 out_put: 1096 if (ret) 1097 drm_mode_object_put(dev, &encoder->base); 1098 1099 out_unlock: 1100 drm_modeset_unlock_all(dev); 1101 1102 return ret; 1103 } 1104 EXPORT_SYMBOL(drm_encoder_init); 1105 1106 /** 1107 * drm_encoder_cleanup - cleans up an initialised encoder 1108 * @encoder: encoder to cleanup 1109 * 1110 * Cleans up the encoder but doesn't free the object. 1111 */ 1112 void drm_encoder_cleanup(struct drm_encoder *encoder) 1113 { 1114 struct drm_device *dev = encoder->dev; 1115 1116 drm_modeset_lock_all(dev); 1117 drm_mode_object_put(dev, &encoder->base); 1118 kfree(encoder->name); 1119 list_del(&encoder->head); 1120 dev->mode_config.num_encoder--; 1121 drm_modeset_unlock_all(dev); 1122 1123 memset(encoder, 0, sizeof(*encoder)); 1124 } 1125 EXPORT_SYMBOL(drm_encoder_cleanup); 1126 1127 /** 1128 * drm_universal_plane_init - Initialize a new universal plane object 1129 * @dev: DRM device 1130 * @plane: plane object to init 1131 * @possible_crtcs: bitmask of possible CRTCs 1132 * @funcs: callbacks for the new plane 1133 * @formats: array of supported formats (%DRM_FORMAT_*) 1134 * @format_count: number of elements in @formats 1135 * @type: type of plane (overlay, primary, cursor) 1136 * 1137 * Initializes a plane object of type @type. 1138 * 1139 * Returns: 1140 * Zero on success, error code on failure. 1141 */ 1142 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1143 unsigned long possible_crtcs, 1144 const struct drm_plane_funcs *funcs, 1145 const uint32_t *formats, uint32_t format_count, 1146 enum drm_plane_type type) 1147 { 1148 struct drm_mode_config *config = &dev->mode_config; 1149 int ret; 1150 1151 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1152 if (ret) 1153 return ret; 1154 1155 drm_modeset_lock_init(&plane->mutex); 1156 1157 plane->base.properties = &plane->properties; 1158 plane->dev = dev; 1159 plane->funcs = funcs; 1160 plane->format_types = kmalloc(sizeof(uint32_t) * format_count, 1161 M_DRM, M_WAITOK); 1162 if (!plane->format_types) { 1163 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1164 drm_mode_object_put(dev, &plane->base); 1165 return -ENOMEM; 1166 } 1167 1168 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1169 plane->format_count = format_count; 1170 plane->possible_crtcs = possible_crtcs; 1171 plane->type = type; 1172 1173 list_add_tail(&plane->head, &config->plane_list); 1174 config->num_total_plane++; 1175 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1176 config->num_overlay_plane++; 1177 1178 drm_object_attach_property(&plane->base, 1179 config->plane_type_property, 1180 plane->type); 1181 1182 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 1183 drm_object_attach_property(&plane->base, config->prop_fb_id, 0); 1184 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); 1185 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); 1186 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); 1187 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); 1188 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); 1189 drm_object_attach_property(&plane->base, config->prop_src_x, 0); 1190 drm_object_attach_property(&plane->base, config->prop_src_y, 0); 1191 drm_object_attach_property(&plane->base, config->prop_src_w, 0); 1192 drm_object_attach_property(&plane->base, config->prop_src_h, 0); 1193 } 1194 1195 return 0; 1196 } 1197 EXPORT_SYMBOL(drm_universal_plane_init); 1198 1199 /** 1200 * drm_plane_init - Initialize a legacy plane 1201 * @dev: DRM device 1202 * @plane: plane object to init 1203 * @possible_crtcs: bitmask of possible CRTCs 1204 * @funcs: callbacks for the new plane 1205 * @formats: array of supported formats (%DRM_FORMAT_*) 1206 * @format_count: number of elements in @formats 1207 * @is_primary: plane type (primary vs overlay) 1208 * 1209 * Legacy API to initialize a DRM plane. 1210 * 1211 * New drivers should call drm_universal_plane_init() instead. 1212 * 1213 * Returns: 1214 * Zero on success, error code on failure. 1215 */ 1216 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1217 unsigned long possible_crtcs, 1218 const struct drm_plane_funcs *funcs, 1219 const uint32_t *formats, uint32_t format_count, 1220 bool is_primary) 1221 { 1222 enum drm_plane_type type; 1223 1224 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1225 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1226 formats, format_count, type); 1227 } 1228 EXPORT_SYMBOL(drm_plane_init); 1229 1230 /** 1231 * drm_plane_cleanup - Clean up the core plane usage 1232 * @plane: plane to cleanup 1233 * 1234 * This function cleans up @plane and removes it from the DRM mode setting 1235 * core. Note that the function does *not* free the plane structure itself, 1236 * this is the responsibility of the caller. 1237 */ 1238 void drm_plane_cleanup(struct drm_plane *plane) 1239 { 1240 struct drm_device *dev = plane->dev; 1241 1242 drm_modeset_lock_all(dev); 1243 kfree(plane->format_types); 1244 drm_mode_object_put(dev, &plane->base); 1245 1246 BUG_ON(list_empty(&plane->head)); 1247 1248 list_del(&plane->head); 1249 dev->mode_config.num_total_plane--; 1250 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1251 dev->mode_config.num_overlay_plane--; 1252 drm_modeset_unlock_all(dev); 1253 1254 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1255 if (plane->state && plane->funcs->atomic_destroy_state) 1256 plane->funcs->atomic_destroy_state(plane, plane->state); 1257 1258 memset(plane, 0, sizeof(*plane)); 1259 } 1260 EXPORT_SYMBOL(drm_plane_cleanup); 1261 1262 /** 1263 * drm_plane_index - find the index of a registered plane 1264 * @plane: plane to find index for 1265 * 1266 * Given a registered plane, return the index of that CRTC within a DRM 1267 * device's list of planes. 1268 */ 1269 unsigned int drm_plane_index(struct drm_plane *plane) 1270 { 1271 unsigned int index = 0; 1272 struct drm_plane *tmp; 1273 1274 list_for_each_entry(tmp, &plane->dev->mode_config.plane_list, head) { 1275 if (tmp == plane) 1276 return index; 1277 1278 index++; 1279 } 1280 1281 BUG(); 1282 } 1283 EXPORT_SYMBOL(drm_plane_index); 1284 1285 /** 1286 * drm_plane_force_disable - Forcibly disable a plane 1287 * @plane: plane to disable 1288 * 1289 * Forces the plane to be disabled. 1290 * 1291 * Used when the plane's current framebuffer is destroyed, 1292 * and when restoring fbdev mode. 1293 */ 1294 void drm_plane_force_disable(struct drm_plane *plane) 1295 { 1296 int ret; 1297 1298 if (!plane->fb) 1299 return; 1300 1301 plane->old_fb = plane->fb; 1302 ret = plane->funcs->disable_plane(plane); 1303 if (ret) { 1304 DRM_ERROR("failed to disable plane with busy fb\n"); 1305 plane->old_fb = NULL; 1306 return; 1307 } 1308 /* disconnect the plane from the fb and crtc: */ 1309 drm_framebuffer_unreference(plane->old_fb); 1310 plane->old_fb = NULL; 1311 plane->fb = NULL; 1312 plane->crtc = NULL; 1313 } 1314 EXPORT_SYMBOL(drm_plane_force_disable); 1315 1316 static int drm_mode_create_standard_properties(struct drm_device *dev) 1317 { 1318 struct drm_property *prop; 1319 1320 /* 1321 * Standard properties (apply to all connectors) 1322 */ 1323 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1324 DRM_MODE_PROP_IMMUTABLE, 1325 "EDID", 0); 1326 if (!prop) 1327 return -ENOMEM; 1328 dev->mode_config.edid_property = prop; 1329 1330 prop = drm_property_create_enum(dev, 0, 1331 "DPMS", drm_dpms_enum_list, 1332 ARRAY_SIZE(drm_dpms_enum_list)); 1333 if (!prop) 1334 return -ENOMEM; 1335 dev->mode_config.dpms_property = prop; 1336 1337 prop = drm_property_create(dev, 1338 DRM_MODE_PROP_BLOB | 1339 DRM_MODE_PROP_IMMUTABLE, 1340 "PATH", 0); 1341 if (!prop) 1342 return -ENOMEM; 1343 dev->mode_config.path_property = prop; 1344 1345 prop = drm_property_create(dev, 1346 DRM_MODE_PROP_BLOB | 1347 DRM_MODE_PROP_IMMUTABLE, 1348 "TILE", 0); 1349 if (!prop) 1350 return -ENOMEM; 1351 dev->mode_config.tile_property = prop; 1352 1353 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1354 "type", drm_plane_type_enum_list, 1355 ARRAY_SIZE(drm_plane_type_enum_list)); 1356 if (!prop) 1357 return -ENOMEM; 1358 dev->mode_config.plane_type_property = prop; 1359 1360 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1361 "SRC_X", 0, UINT_MAX); 1362 if (!prop) 1363 return -ENOMEM; 1364 dev->mode_config.prop_src_x = prop; 1365 1366 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1367 "SRC_Y", 0, UINT_MAX); 1368 if (!prop) 1369 return -ENOMEM; 1370 dev->mode_config.prop_src_y = prop; 1371 1372 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1373 "SRC_W", 0, UINT_MAX); 1374 if (!prop) 1375 return -ENOMEM; 1376 dev->mode_config.prop_src_w = prop; 1377 1378 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1379 "SRC_H", 0, UINT_MAX); 1380 if (!prop) 1381 return -ENOMEM; 1382 dev->mode_config.prop_src_h = prop; 1383 1384 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1385 "CRTC_X", INT_MIN, INT_MAX); 1386 if (!prop) 1387 return -ENOMEM; 1388 dev->mode_config.prop_crtc_x = prop; 1389 1390 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1391 "CRTC_Y", INT_MIN, INT_MAX); 1392 if (!prop) 1393 return -ENOMEM; 1394 dev->mode_config.prop_crtc_y = prop; 1395 1396 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1397 "CRTC_W", 0, INT_MAX); 1398 if (!prop) 1399 return -ENOMEM; 1400 dev->mode_config.prop_crtc_w = prop; 1401 1402 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1403 "CRTC_H", 0, INT_MAX); 1404 if (!prop) 1405 return -ENOMEM; 1406 dev->mode_config.prop_crtc_h = prop; 1407 1408 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1409 "FB_ID", DRM_MODE_OBJECT_FB); 1410 if (!prop) 1411 return -ENOMEM; 1412 dev->mode_config.prop_fb_id = prop; 1413 1414 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1415 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 1416 if (!prop) 1417 return -ENOMEM; 1418 dev->mode_config.prop_crtc_id = prop; 1419 1420 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 1421 "ACTIVE"); 1422 if (!prop) 1423 return -ENOMEM; 1424 dev->mode_config.prop_active = prop; 1425 1426 return 0; 1427 } 1428 1429 /** 1430 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1431 * @dev: DRM device 1432 * 1433 * Called by a driver the first time a DVI-I connector is made. 1434 */ 1435 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1436 { 1437 struct drm_property *dvi_i_selector; 1438 struct drm_property *dvi_i_subconnector; 1439 1440 if (dev->mode_config.dvi_i_select_subconnector_property) 1441 return 0; 1442 1443 dvi_i_selector = 1444 drm_property_create_enum(dev, 0, 1445 "select subconnector", 1446 drm_dvi_i_select_enum_list, 1447 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1448 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1449 1450 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1451 "subconnector", 1452 drm_dvi_i_subconnector_enum_list, 1453 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1454 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1455 1456 return 0; 1457 } 1458 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1459 1460 /** 1461 * drm_create_tv_properties - create TV specific connector properties 1462 * @dev: DRM device 1463 * @num_modes: number of different TV formats (modes) supported 1464 * @modes: array of pointers to strings containing name of each format 1465 * 1466 * Called by a driver's TV initialization routine, this function creates 1467 * the TV specific connector properties for a given device. Caller is 1468 * responsible for allocating a list of format names and passing them to 1469 * this routine. 1470 */ 1471 int drm_mode_create_tv_properties(struct drm_device *dev, 1472 unsigned int num_modes, 1473 char *modes[]) 1474 { 1475 struct drm_property *tv_selector; 1476 struct drm_property *tv_subconnector; 1477 unsigned int i; 1478 1479 if (dev->mode_config.tv_select_subconnector_property) 1480 return 0; 1481 1482 /* 1483 * Basic connector properties 1484 */ 1485 tv_selector = drm_property_create_enum(dev, 0, 1486 "select subconnector", 1487 drm_tv_select_enum_list, 1488 ARRAY_SIZE(drm_tv_select_enum_list)); 1489 dev->mode_config.tv_select_subconnector_property = tv_selector; 1490 1491 tv_subconnector = 1492 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1493 "subconnector", 1494 drm_tv_subconnector_enum_list, 1495 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1496 dev->mode_config.tv_subconnector_property = tv_subconnector; 1497 1498 /* 1499 * Other, TV specific properties: margins & TV modes. 1500 */ 1501 dev->mode_config.tv_left_margin_property = 1502 drm_property_create_range(dev, 0, "left margin", 0, 100); 1503 1504 dev->mode_config.tv_right_margin_property = 1505 drm_property_create_range(dev, 0, "right margin", 0, 100); 1506 1507 dev->mode_config.tv_top_margin_property = 1508 drm_property_create_range(dev, 0, "top margin", 0, 100); 1509 1510 dev->mode_config.tv_bottom_margin_property = 1511 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1512 1513 dev->mode_config.tv_mode_property = 1514 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1515 "mode", num_modes); 1516 for (i = 0; i < num_modes; i++) 1517 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1518 i, modes[i]); 1519 1520 dev->mode_config.tv_brightness_property = 1521 drm_property_create_range(dev, 0, "brightness", 0, 100); 1522 1523 dev->mode_config.tv_contrast_property = 1524 drm_property_create_range(dev, 0, "contrast", 0, 100); 1525 1526 dev->mode_config.tv_flicker_reduction_property = 1527 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1528 1529 dev->mode_config.tv_overscan_property = 1530 drm_property_create_range(dev, 0, "overscan", 0, 100); 1531 1532 dev->mode_config.tv_saturation_property = 1533 drm_property_create_range(dev, 0, "saturation", 0, 100); 1534 1535 dev->mode_config.tv_hue_property = 1536 drm_property_create_range(dev, 0, "hue", 0, 100); 1537 1538 return 0; 1539 } 1540 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1541 1542 /** 1543 * drm_mode_create_scaling_mode_property - create scaling mode property 1544 * @dev: DRM device 1545 * 1546 * Called by a driver the first time it's needed, must be attached to desired 1547 * connectors. 1548 */ 1549 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1550 { 1551 struct drm_property *scaling_mode; 1552 1553 if (dev->mode_config.scaling_mode_property) 1554 return 0; 1555 1556 scaling_mode = 1557 drm_property_create_enum(dev, 0, "scaling mode", 1558 drm_scaling_mode_enum_list, 1559 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1560 1561 dev->mode_config.scaling_mode_property = scaling_mode; 1562 1563 return 0; 1564 } 1565 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1566 1567 /** 1568 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1569 * @dev: DRM device 1570 * 1571 * Called by a driver the first time it's needed, must be attached to desired 1572 * connectors. 1573 * 1574 * Returns: 1575 * Zero on success, negative errno on failure. 1576 */ 1577 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1578 { 1579 if (dev->mode_config.aspect_ratio_property) 1580 return 0; 1581 1582 dev->mode_config.aspect_ratio_property = 1583 drm_property_create_enum(dev, 0, "aspect ratio", 1584 drm_aspect_ratio_enum_list, 1585 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1586 1587 if (dev->mode_config.aspect_ratio_property == NULL) 1588 return -ENOMEM; 1589 1590 return 0; 1591 } 1592 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1593 1594 /** 1595 * drm_mode_create_dirty_property - create dirty property 1596 * @dev: DRM device 1597 * 1598 * Called by a driver the first time it's needed, must be attached to desired 1599 * connectors. 1600 */ 1601 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1602 { 1603 struct drm_property *dirty_info; 1604 1605 if (dev->mode_config.dirty_info_property) 1606 return 0; 1607 1608 dirty_info = 1609 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1610 "dirty", 1611 drm_dirty_info_enum_list, 1612 ARRAY_SIZE(drm_dirty_info_enum_list)); 1613 dev->mode_config.dirty_info_property = dirty_info; 1614 1615 return 0; 1616 } 1617 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1618 1619 /** 1620 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1621 * @dev: DRM device 1622 * 1623 * Create the the suggested x/y offset property for connectors. 1624 */ 1625 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1626 { 1627 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1628 return 0; 1629 1630 dev->mode_config.suggested_x_property = 1631 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1632 1633 dev->mode_config.suggested_y_property = 1634 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1635 1636 if (dev->mode_config.suggested_x_property == NULL || 1637 dev->mode_config.suggested_y_property == NULL) 1638 return -ENOMEM; 1639 return 0; 1640 } 1641 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1642 1643 static int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group) 1644 { 1645 uint32_t total_objects = 0; 1646 1647 total_objects += dev->mode_config.num_crtc; 1648 total_objects += dev->mode_config.num_connector; 1649 total_objects += dev->mode_config.num_encoder; 1650 1651 group->id_list = kcalloc(total_objects, sizeof(uint32_t), GFP_KERNEL); 1652 if (!group->id_list) 1653 return -ENOMEM; 1654 1655 group->num_crtcs = 0; 1656 group->num_connectors = 0; 1657 group->num_encoders = 0; 1658 return 0; 1659 } 1660 1661 void drm_mode_group_destroy(struct drm_mode_group *group) 1662 { 1663 kfree(group->id_list); 1664 group->id_list = NULL; 1665 } 1666 1667 /* 1668 * NOTE: Driver's shouldn't ever call drm_mode_group_init_legacy_group - it is 1669 * the drm core's responsibility to set up mode control groups. 1670 */ 1671 int drm_mode_group_init_legacy_group(struct drm_device *dev, 1672 struct drm_mode_group *group) 1673 { 1674 struct drm_crtc *crtc; 1675 struct drm_encoder *encoder; 1676 struct drm_connector *connector; 1677 int ret; 1678 1679 ret = drm_mode_group_init(dev, group); 1680 if (ret) 1681 return ret; 1682 1683 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 1684 group->id_list[group->num_crtcs++] = crtc->base.id; 1685 1686 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 1687 group->id_list[group->num_crtcs + group->num_encoders++] = 1688 encoder->base.id; 1689 1690 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1691 group->id_list[group->num_crtcs + group->num_encoders + 1692 group->num_connectors++] = connector->base.id; 1693 1694 return 0; 1695 } 1696 EXPORT_SYMBOL(drm_mode_group_init_legacy_group); 1697 1698 void drm_reinit_primary_mode_group(struct drm_device *dev) 1699 { 1700 drm_modeset_lock_all(dev); 1701 drm_mode_group_destroy(&dev->primary->mode_group); 1702 drm_mode_group_init_legacy_group(dev, &dev->primary->mode_group); 1703 drm_modeset_unlock_all(dev); 1704 } 1705 EXPORT_SYMBOL(drm_reinit_primary_mode_group); 1706 1707 /** 1708 * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo 1709 * @out: drm_mode_modeinfo struct to return to the user 1710 * @in: drm_display_mode to use 1711 * 1712 * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to 1713 * the user. 1714 */ 1715 static void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out, 1716 const struct drm_display_mode *in) 1717 { 1718 WARN(in->hdisplay > USHRT_MAX || in->hsync_start > USHRT_MAX || 1719 in->hsync_end > USHRT_MAX || in->htotal > USHRT_MAX || 1720 in->hskew > USHRT_MAX || in->vdisplay > USHRT_MAX || 1721 in->vsync_start > USHRT_MAX || in->vsync_end > USHRT_MAX || 1722 in->vtotal > USHRT_MAX || in->vscan > USHRT_MAX, 1723 "timing values too large for mode info\n"); 1724 1725 out->clock = in->clock; 1726 out->hdisplay = in->hdisplay; 1727 out->hsync_start = in->hsync_start; 1728 out->hsync_end = in->hsync_end; 1729 out->htotal = in->htotal; 1730 out->hskew = in->hskew; 1731 out->vdisplay = in->vdisplay; 1732 out->vsync_start = in->vsync_start; 1733 out->vsync_end = in->vsync_end; 1734 out->vtotal = in->vtotal; 1735 out->vscan = in->vscan; 1736 out->vrefresh = in->vrefresh; 1737 out->flags = in->flags; 1738 out->type = in->type; 1739 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1740 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1741 } 1742 1743 /** 1744 * drm_crtc_convert_umode - convert a modeinfo into a drm_display_mode 1745 * @out: drm_display_mode to return to the user 1746 * @in: drm_mode_modeinfo to use 1747 * 1748 * Convert a drm_mode_modeinfo into a drm_display_mode structure to return to 1749 * the caller. 1750 * 1751 * Returns: 1752 * Zero on success, negative errno on failure. 1753 */ 1754 static int drm_crtc_convert_umode(struct drm_display_mode *out, 1755 const struct drm_mode_modeinfo *in) 1756 { 1757 if (in->clock > INT_MAX || in->vrefresh > INT_MAX) 1758 return -ERANGE; 1759 1760 if ((in->flags & DRM_MODE_FLAG_3D_MASK) > DRM_MODE_FLAG_3D_MAX) 1761 return -EINVAL; 1762 1763 out->clock = in->clock; 1764 out->hdisplay = in->hdisplay; 1765 out->hsync_start = in->hsync_start; 1766 out->hsync_end = in->hsync_end; 1767 out->htotal = in->htotal; 1768 out->hskew = in->hskew; 1769 out->vdisplay = in->vdisplay; 1770 out->vsync_start = in->vsync_start; 1771 out->vsync_end = in->vsync_end; 1772 out->vtotal = in->vtotal; 1773 out->vscan = in->vscan; 1774 out->vrefresh = in->vrefresh; 1775 out->flags = in->flags; 1776 out->type = in->type; 1777 strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN); 1778 out->name[DRM_DISPLAY_MODE_LEN-1] = 0; 1779 1780 return 0; 1781 } 1782 1783 /** 1784 * drm_mode_getresources - get graphics configuration 1785 * @dev: drm device for the ioctl 1786 * @data: data pointer for the ioctl 1787 * @file_priv: drm file for the ioctl call 1788 * 1789 * Construct a set of configuration description structures and return 1790 * them to the user, including CRTC, connector and framebuffer configuration. 1791 * 1792 * Called by the user via ioctl. 1793 * 1794 * Returns: 1795 * Zero on success, negative errno on failure. 1796 */ 1797 int drm_mode_getresources(struct drm_device *dev, void *data, 1798 struct drm_file *file_priv) 1799 { 1800 struct drm_mode_card_res *card_res = data; 1801 struct list_head *lh; 1802 struct drm_framebuffer *fb; 1803 struct drm_connector *connector; 1804 struct drm_crtc *crtc; 1805 struct drm_encoder *encoder; 1806 int ret = 0; 1807 int connector_count = 0; 1808 int crtc_count = 0; 1809 int fb_count = 0; 1810 int encoder_count = 0; 1811 int copied = 0, i; 1812 uint32_t __user *fb_id; 1813 uint32_t __user *crtc_id; 1814 uint32_t __user *connector_id; 1815 uint32_t __user *encoder_id; 1816 struct drm_mode_group *mode_group; 1817 1818 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1819 return -EINVAL; 1820 1821 1822 mutex_lock(&file_priv->fbs_lock); 1823 /* 1824 * For the non-control nodes we need to limit the list of resources 1825 * by IDs in the group list for this node 1826 */ 1827 list_for_each(lh, &file_priv->fbs) 1828 fb_count++; 1829 1830 /* handle this in 4 parts */ 1831 /* FBs */ 1832 if (card_res->count_fbs >= fb_count) { 1833 copied = 0; 1834 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1835 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1836 if (put_user(fb->base.id, fb_id + copied)) { 1837 mutex_unlock(&file_priv->fbs_lock); 1838 return -EFAULT; 1839 } 1840 copied++; 1841 } 1842 } 1843 card_res->count_fbs = fb_count; 1844 mutex_unlock(&file_priv->fbs_lock); 1845 1846 /* mode_config.mutex protects the connector list against e.g. DP MST 1847 * connector hot-adding. CRTC/Plane lists are invariant. */ 1848 mutex_lock(&dev->mode_config.mutex); 1849 if (!drm_is_primary_client(file_priv)) { 1850 1851 mode_group = NULL; 1852 list_for_each(lh, &dev->mode_config.crtc_list) 1853 crtc_count++; 1854 1855 list_for_each(lh, &dev->mode_config.connector_list) 1856 connector_count++; 1857 1858 list_for_each(lh, &dev->mode_config.encoder_list) 1859 encoder_count++; 1860 #if 0 1861 } else { 1862 1863 mode_group = &file_priv->master->minor->mode_group; 1864 crtc_count = mode_group->num_crtcs; 1865 connector_count = mode_group->num_connectors; 1866 encoder_count = mode_group->num_encoders; 1867 #endif 1868 } 1869 1870 card_res->max_height = dev->mode_config.max_height; 1871 card_res->min_height = dev->mode_config.min_height; 1872 card_res->max_width = dev->mode_config.max_width; 1873 card_res->min_width = dev->mode_config.min_width; 1874 1875 /* CRTCs */ 1876 if (card_res->count_crtcs >= crtc_count) { 1877 copied = 0; 1878 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 1879 if (!mode_group) { 1880 list_for_each_entry(crtc, &dev->mode_config.crtc_list, 1881 head) { 1882 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 1883 if (put_user(crtc->base.id, crtc_id + copied)) { 1884 ret = -EFAULT; 1885 goto out; 1886 } 1887 copied++; 1888 } 1889 } else { 1890 for (i = 0; i < mode_group->num_crtcs; i++) { 1891 if (put_user(mode_group->id_list[i], 1892 crtc_id + copied)) { 1893 ret = -EFAULT; 1894 goto out; 1895 } 1896 copied++; 1897 } 1898 } 1899 } 1900 card_res->count_crtcs = crtc_count; 1901 1902 /* Encoders */ 1903 if (card_res->count_encoders >= encoder_count) { 1904 copied = 0; 1905 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 1906 if (!mode_group) { 1907 list_for_each_entry(encoder, 1908 &dev->mode_config.encoder_list, 1909 head) { 1910 DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id, 1911 encoder->name); 1912 if (put_user(encoder->base.id, encoder_id + 1913 copied)) { 1914 ret = -EFAULT; 1915 goto out; 1916 } 1917 copied++; 1918 } 1919 } else { 1920 for (i = mode_group->num_crtcs; i < mode_group->num_crtcs + mode_group->num_encoders; i++) { 1921 if (put_user(mode_group->id_list[i], 1922 encoder_id + copied)) { 1923 ret = -EFAULT; 1924 goto out; 1925 } 1926 copied++; 1927 } 1928 1929 } 1930 } 1931 card_res->count_encoders = encoder_count; 1932 1933 /* Connectors */ 1934 if (card_res->count_connectors >= connector_count) { 1935 copied = 0; 1936 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 1937 if (!mode_group) { 1938 list_for_each_entry(connector, 1939 &dev->mode_config.connector_list, 1940 head) { 1941 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 1942 connector->base.id, 1943 connector->name); 1944 if (put_user(connector->base.id, 1945 connector_id + copied)) { 1946 ret = -EFAULT; 1947 goto out; 1948 } 1949 copied++; 1950 } 1951 } else { 1952 int start = mode_group->num_crtcs + 1953 mode_group->num_encoders; 1954 for (i = start; i < start + mode_group->num_connectors; i++) { 1955 if (put_user(mode_group->id_list[i], 1956 connector_id + copied)) { 1957 ret = -EFAULT; 1958 goto out; 1959 } 1960 copied++; 1961 } 1962 } 1963 } 1964 card_res->count_connectors = connector_count; 1965 1966 DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs, 1967 card_res->count_connectors, card_res->count_encoders); 1968 1969 out: 1970 mutex_unlock(&dev->mode_config.mutex); 1971 return ret; 1972 } 1973 1974 /** 1975 * drm_mode_getcrtc - get CRTC configuration 1976 * @dev: drm device for the ioctl 1977 * @data: data pointer for the ioctl 1978 * @file_priv: drm file for the ioctl call 1979 * 1980 * Construct a CRTC configuration structure to return to the user. 1981 * 1982 * Called by the user via ioctl. 1983 * 1984 * Returns: 1985 * Zero on success, negative errno on failure. 1986 */ 1987 int drm_mode_getcrtc(struct drm_device *dev, 1988 void *data, struct drm_file *file_priv) 1989 { 1990 struct drm_mode_crtc *crtc_resp = data; 1991 struct drm_crtc *crtc; 1992 1993 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1994 return -EINVAL; 1995 1996 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 1997 if (!crtc) 1998 return -ENOENT; 1999 2000 drm_modeset_lock_crtc(crtc, crtc->primary); 2001 crtc_resp->gamma_size = crtc->gamma_size; 2002 if (crtc->primary->fb) 2003 crtc_resp->fb_id = crtc->primary->fb->base.id; 2004 else 2005 crtc_resp->fb_id = 0; 2006 2007 if (crtc->state) { 2008 crtc_resp->x = crtc->primary->state->src_x >> 16; 2009 crtc_resp->y = crtc->primary->state->src_y >> 16; 2010 if (crtc->state->enable) { 2011 drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); 2012 crtc_resp->mode_valid = 1; 2013 2014 } else { 2015 crtc_resp->mode_valid = 0; 2016 } 2017 } else { 2018 crtc_resp->x = crtc->x; 2019 crtc_resp->y = crtc->y; 2020 if (crtc->enabled) { 2021 drm_crtc_convert_to_umode(&crtc_resp->mode, &crtc->mode); 2022 crtc_resp->mode_valid = 1; 2023 2024 } else { 2025 crtc_resp->mode_valid = 0; 2026 } 2027 } 2028 drm_modeset_unlock_crtc(crtc); 2029 2030 return 0; 2031 } 2032 2033 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 2034 const struct drm_file *file_priv) 2035 { 2036 /* 2037 * If user-space hasn't configured the driver to expose the stereo 3D 2038 * modes, don't expose them. 2039 */ 2040 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 2041 return false; 2042 2043 return true; 2044 } 2045 2046 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 2047 { 2048 /* For atomic drivers only state objects are synchronously updated and 2049 * protected by modeset locks, so check those first. */ 2050 if (connector->state) 2051 return connector->state->best_encoder; 2052 return connector->encoder; 2053 } 2054 2055 /* helper for getconnector and getproperties ioctls */ 2056 static int get_properties(struct drm_mode_object *obj, bool atomic, 2057 uint32_t __user *prop_ptr, uint64_t __user *prop_values, 2058 uint32_t *arg_count_props) 2059 { 2060 int props_count; 2061 int i, ret, copied; 2062 2063 props_count = obj->properties->count; 2064 if (!atomic) 2065 props_count -= obj->properties->atomic_count; 2066 2067 if ((*arg_count_props >= props_count) && props_count) { 2068 for (i = 0, copied = 0; copied < props_count; i++) { 2069 struct drm_property *prop = obj->properties->properties[i]; 2070 uint64_t val; 2071 2072 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) 2073 continue; 2074 2075 ret = drm_object_property_get_value(obj, prop, &val); 2076 if (ret) 2077 return ret; 2078 2079 if (put_user(prop->base.id, prop_ptr + copied)) 2080 return -EFAULT; 2081 2082 if (put_user(val, prop_values + copied)) 2083 return -EFAULT; 2084 2085 copied++; 2086 } 2087 } 2088 *arg_count_props = props_count; 2089 2090 return 0; 2091 } 2092 2093 /** 2094 * drm_mode_getconnector - get connector configuration 2095 * @dev: drm device for the ioctl 2096 * @data: data pointer for the ioctl 2097 * @file_priv: drm file for the ioctl call 2098 * 2099 * Construct a connector configuration structure to return to the user. 2100 * 2101 * Called by the user via ioctl. 2102 * 2103 * Returns: 2104 * Zero on success, negative errno on failure. 2105 */ 2106 int drm_mode_getconnector(struct drm_device *dev, void *data, 2107 struct drm_file *file_priv) 2108 { 2109 struct drm_mode_get_connector *out_resp = data; 2110 struct drm_connector *connector; 2111 struct drm_encoder *encoder; 2112 struct drm_display_mode *mode; 2113 int mode_count = 0; 2114 int encoders_count = 0; 2115 int ret = 0; 2116 int copied = 0; 2117 int i; 2118 struct drm_mode_modeinfo u_mode; 2119 struct drm_mode_modeinfo __user *mode_ptr; 2120 uint32_t __user *encoder_ptr; 2121 2122 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2123 return -EINVAL; 2124 2125 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2126 2127 DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id); 2128 2129 mutex_lock(&dev->mode_config.mutex); 2130 2131 connector = drm_connector_find(dev, out_resp->connector_id); 2132 if (!connector) { 2133 ret = -ENOENT; 2134 goto out_unlock; 2135 } 2136 2137 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) 2138 if (connector->encoder_ids[i] != 0) 2139 encoders_count++; 2140 2141 if (out_resp->count_modes == 0) { 2142 connector->funcs->fill_modes(connector, 2143 dev->mode_config.max_width, 2144 dev->mode_config.max_height); 2145 } 2146 2147 /* delayed so we get modes regardless of pre-fill_modes state */ 2148 list_for_each_entry(mode, &connector->modes, head) 2149 if (drm_mode_expose_to_userspace(mode, file_priv)) 2150 mode_count++; 2151 2152 out_resp->connector_id = connector->base.id; 2153 out_resp->connector_type = connector->connector_type; 2154 out_resp->connector_type_id = connector->connector_type_id; 2155 out_resp->mm_width = connector->display_info.width_mm; 2156 out_resp->mm_height = connector->display_info.height_mm; 2157 out_resp->subpixel = connector->display_info.subpixel_order; 2158 out_resp->connection = connector->status; 2159 2160 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2161 encoder = drm_connector_get_encoder(connector); 2162 if (encoder) 2163 out_resp->encoder_id = encoder->base.id; 2164 else 2165 out_resp->encoder_id = 0; 2166 2167 /* 2168 * This ioctl is called twice, once to determine how much space is 2169 * needed, and the 2nd time to fill it. 2170 */ 2171 if ((out_resp->count_modes >= mode_count) && mode_count) { 2172 copied = 0; 2173 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2174 list_for_each_entry(mode, &connector->modes, head) { 2175 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2176 continue; 2177 2178 drm_crtc_convert_to_umode(&u_mode, mode); 2179 if (copy_to_user(mode_ptr + copied, 2180 &u_mode, sizeof(u_mode))) { 2181 ret = -EFAULT; 2182 goto out; 2183 } 2184 copied++; 2185 } 2186 } 2187 out_resp->count_modes = mode_count; 2188 2189 ret = get_properties(&connector->base, file_priv->atomic, 2190 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2191 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2192 &out_resp->count_props); 2193 if (ret) 2194 goto out; 2195 2196 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2197 copied = 0; 2198 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2199 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2200 if (connector->encoder_ids[i] != 0) { 2201 if (put_user(connector->encoder_ids[i], 2202 encoder_ptr + copied)) { 2203 ret = -EFAULT; 2204 goto out; 2205 } 2206 copied++; 2207 } 2208 } 2209 } 2210 out_resp->count_encoders = encoders_count; 2211 2212 out: 2213 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2214 2215 out_unlock: 2216 mutex_unlock(&dev->mode_config.mutex); 2217 2218 return ret; 2219 } 2220 2221 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2222 { 2223 struct drm_connector *connector; 2224 struct drm_device *dev = encoder->dev; 2225 bool uses_atomic = false; 2226 2227 /* For atomic drivers only state objects are synchronously updated and 2228 * protected by modeset locks, so check those first. */ 2229 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 2230 if (!connector->state) 2231 continue; 2232 2233 uses_atomic = true; 2234 2235 if (connector->state->best_encoder != encoder) 2236 continue; 2237 2238 return connector->state->crtc; 2239 } 2240 2241 /* Don't return stale data (e.g. pending async disable). */ 2242 if (uses_atomic) 2243 return NULL; 2244 2245 return encoder->crtc; 2246 } 2247 2248 /** 2249 * drm_mode_getencoder - get encoder configuration 2250 * @dev: drm device for the ioctl 2251 * @data: data pointer for the ioctl 2252 * @file_priv: drm file for the ioctl call 2253 * 2254 * Construct a encoder configuration structure to return to the user. 2255 * 2256 * Called by the user via ioctl. 2257 * 2258 * Returns: 2259 * Zero on success, negative errno on failure. 2260 */ 2261 int drm_mode_getencoder(struct drm_device *dev, void *data, 2262 struct drm_file *file_priv) 2263 { 2264 struct drm_mode_get_encoder *enc_resp = data; 2265 struct drm_encoder *encoder; 2266 struct drm_crtc *crtc; 2267 2268 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2269 return -EINVAL; 2270 2271 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2272 if (!encoder) 2273 return -ENOENT; 2274 2275 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2276 crtc = drm_encoder_get_crtc(encoder); 2277 if (crtc) 2278 enc_resp->crtc_id = crtc->base.id; 2279 else 2280 enc_resp->crtc_id = 0; 2281 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2282 2283 enc_resp->encoder_type = encoder->encoder_type; 2284 enc_resp->encoder_id = encoder->base.id; 2285 enc_resp->possible_crtcs = encoder->possible_crtcs; 2286 enc_resp->possible_clones = encoder->possible_clones; 2287 2288 return 0; 2289 } 2290 2291 /** 2292 * drm_mode_getplane_res - enumerate all plane resources 2293 * @dev: DRM device 2294 * @data: ioctl data 2295 * @file_priv: DRM file info 2296 * 2297 * Construct a list of plane ids to return to the user. 2298 * 2299 * Called by the user via ioctl. 2300 * 2301 * Returns: 2302 * Zero on success, negative errno on failure. 2303 */ 2304 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2305 struct drm_file *file_priv) 2306 { 2307 struct drm_mode_get_plane_res *plane_resp = data; 2308 struct drm_mode_config *config; 2309 struct drm_plane *plane; 2310 uint32_t __user *plane_ptr; 2311 int copied = 0; 2312 unsigned num_planes; 2313 2314 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2315 return -EINVAL; 2316 2317 config = &dev->mode_config; 2318 2319 if (file_priv->universal_planes) 2320 num_planes = config->num_total_plane; 2321 else 2322 num_planes = config->num_overlay_plane; 2323 2324 /* 2325 * This ioctl is called twice, once to determine how much space is 2326 * needed, and the 2nd time to fill it. 2327 */ 2328 if (num_planes && 2329 (plane_resp->count_planes >= num_planes)) { 2330 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2331 2332 /* Plane lists are invariant, no locking needed. */ 2333 list_for_each_entry(plane, &config->plane_list, head) { 2334 /* 2335 * Unless userspace set the 'universal planes' 2336 * capability bit, only advertise overlays. 2337 */ 2338 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2339 !file_priv->universal_planes) 2340 continue; 2341 2342 if (put_user(plane->base.id, plane_ptr + copied)) 2343 return -EFAULT; 2344 copied++; 2345 } 2346 } 2347 plane_resp->count_planes = num_planes; 2348 2349 return 0; 2350 } 2351 2352 /** 2353 * drm_mode_getplane - get plane configuration 2354 * @dev: DRM device 2355 * @data: ioctl data 2356 * @file_priv: DRM file info 2357 * 2358 * Construct a plane configuration structure to return to the user. 2359 * 2360 * Called by the user via ioctl. 2361 * 2362 * Returns: 2363 * Zero on success, negative errno on failure. 2364 */ 2365 int drm_mode_getplane(struct drm_device *dev, void *data, 2366 struct drm_file *file_priv) 2367 { 2368 struct drm_mode_get_plane *plane_resp = data; 2369 struct drm_plane *plane; 2370 uint32_t __user *format_ptr; 2371 2372 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2373 return -EINVAL; 2374 2375 plane = drm_plane_find(dev, plane_resp->plane_id); 2376 if (!plane) 2377 return -ENOENT; 2378 2379 drm_modeset_lock(&plane->mutex, NULL); 2380 if (plane->crtc) 2381 plane_resp->crtc_id = plane->crtc->base.id; 2382 else 2383 plane_resp->crtc_id = 0; 2384 2385 if (plane->fb) 2386 plane_resp->fb_id = plane->fb->base.id; 2387 else 2388 plane_resp->fb_id = 0; 2389 drm_modeset_unlock(&plane->mutex); 2390 2391 plane_resp->plane_id = plane->base.id; 2392 plane_resp->possible_crtcs = plane->possible_crtcs; 2393 plane_resp->gamma_size = 0; 2394 2395 /* 2396 * This ioctl is called twice, once to determine how much space is 2397 * needed, and the 2nd time to fill it. 2398 */ 2399 if (plane->format_count && 2400 (plane_resp->count_format_types >= plane->format_count)) { 2401 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2402 if (copy_to_user(format_ptr, 2403 plane->format_types, 2404 sizeof(uint32_t) * plane->format_count)) { 2405 return -EFAULT; 2406 } 2407 } 2408 plane_resp->count_format_types = plane->format_count; 2409 2410 return 0; 2411 } 2412 2413 /** 2414 * drm_plane_check_pixel_format - Check if the plane supports the pixel format 2415 * @plane: plane to check for format support 2416 * @format: the pixel format 2417 * 2418 * Returns: 2419 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL 2420 * otherwise. 2421 */ 2422 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format) 2423 { 2424 unsigned int i; 2425 2426 for (i = 0; i < plane->format_count; i++) { 2427 if (format == plane->format_types[i]) 2428 return 0; 2429 } 2430 2431 return -EINVAL; 2432 } 2433 2434 /* 2435 * setplane_internal - setplane handler for internal callers 2436 * 2437 * Note that we assume an extra reference has already been taken on fb. If the 2438 * update fails, this reference will be dropped before return; if it succeeds, 2439 * the previous framebuffer (if any) will be unreferenced instead. 2440 * 2441 * src_{x,y,w,h} are provided in 16.16 fixed point format 2442 */ 2443 static int __setplane_internal(struct drm_plane *plane, 2444 struct drm_crtc *crtc, 2445 struct drm_framebuffer *fb, 2446 int32_t crtc_x, int32_t crtc_y, 2447 uint32_t crtc_w, uint32_t crtc_h, 2448 /* src_{x,y,w,h} values are 16.16 fixed point */ 2449 uint32_t src_x, uint32_t src_y, 2450 uint32_t src_w, uint32_t src_h) 2451 { 2452 int ret = 0; 2453 unsigned int fb_width, fb_height; 2454 2455 /* No fb means shut it down */ 2456 if (!fb) { 2457 plane->old_fb = plane->fb; 2458 ret = plane->funcs->disable_plane(plane); 2459 if (!ret) { 2460 plane->crtc = NULL; 2461 plane->fb = NULL; 2462 } else { 2463 plane->old_fb = NULL; 2464 } 2465 goto out; 2466 } 2467 2468 /* Check whether this plane is usable on this CRTC */ 2469 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2470 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2471 ret = -EINVAL; 2472 goto out; 2473 } 2474 2475 /* Check whether this plane supports the fb pixel format. */ 2476 ret = drm_plane_check_pixel_format(plane, fb->pixel_format); 2477 if (ret) { 2478 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2479 drm_get_format_name(fb->pixel_format)); 2480 goto out; 2481 } 2482 2483 /* Give drivers some help against integer overflows */ 2484 if (crtc_w > INT_MAX || 2485 crtc_x > INT_MAX - (int32_t) crtc_w || 2486 crtc_h > INT_MAX || 2487 crtc_y > INT_MAX - (int32_t) crtc_h) { 2488 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2489 crtc_w, crtc_h, crtc_x, crtc_y); 2490 return -ERANGE; 2491 } 2492 2493 2494 fb_width = fb->width << 16; 2495 fb_height = fb->height << 16; 2496 2497 /* Make sure source coordinates are inside the fb. */ 2498 if (src_w > fb_width || 2499 src_x > fb_width - src_w || 2500 src_h > fb_height || 2501 src_y > fb_height - src_h) { 2502 DRM_DEBUG_KMS("Invalid source coordinates " 2503 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2504 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2505 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2506 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2507 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2508 ret = -ENOSPC; 2509 goto out; 2510 } 2511 2512 plane->old_fb = plane->fb; 2513 ret = plane->funcs->update_plane(plane, crtc, fb, 2514 crtc_x, crtc_y, crtc_w, crtc_h, 2515 src_x, src_y, src_w, src_h); 2516 if (!ret) { 2517 plane->crtc = crtc; 2518 plane->fb = fb; 2519 fb = NULL; 2520 } else { 2521 plane->old_fb = NULL; 2522 } 2523 2524 out: 2525 if (fb) 2526 drm_framebuffer_unreference(fb); 2527 if (plane->old_fb) 2528 drm_framebuffer_unreference(plane->old_fb); 2529 plane->old_fb = NULL; 2530 2531 return ret; 2532 } 2533 2534 static int setplane_internal(struct drm_plane *plane, 2535 struct drm_crtc *crtc, 2536 struct drm_framebuffer *fb, 2537 int32_t crtc_x, int32_t crtc_y, 2538 uint32_t crtc_w, uint32_t crtc_h, 2539 /* src_{x,y,w,h} values are 16.16 fixed point */ 2540 uint32_t src_x, uint32_t src_y, 2541 uint32_t src_w, uint32_t src_h) 2542 { 2543 int ret; 2544 2545 drm_modeset_lock_all(plane->dev); 2546 ret = __setplane_internal(plane, crtc, fb, 2547 crtc_x, crtc_y, crtc_w, crtc_h, 2548 src_x, src_y, src_w, src_h); 2549 drm_modeset_unlock_all(plane->dev); 2550 2551 return ret; 2552 } 2553 2554 /** 2555 * drm_mode_setplane - configure a plane's configuration 2556 * @dev: DRM device 2557 * @data: ioctl data* 2558 * @file_priv: DRM file info 2559 * 2560 * Set plane configuration, including placement, fb, scaling, and other factors. 2561 * Or pass a NULL fb to disable (planes may be disabled without providing a 2562 * valid crtc). 2563 * 2564 * Returns: 2565 * Zero on success, negative errno on failure. 2566 */ 2567 int drm_mode_setplane(struct drm_device *dev, void *data, 2568 struct drm_file *file_priv) 2569 { 2570 struct drm_mode_set_plane *plane_req = data; 2571 struct drm_plane *plane; 2572 struct drm_crtc *crtc = NULL; 2573 struct drm_framebuffer *fb = NULL; 2574 2575 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2576 return -EINVAL; 2577 2578 /* 2579 * First, find the plane, crtc, and fb objects. If not available, 2580 * we don't bother to call the driver. 2581 */ 2582 plane = drm_plane_find(dev, plane_req->plane_id); 2583 if (!plane) { 2584 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2585 plane_req->plane_id); 2586 return -ENOENT; 2587 } 2588 2589 if (plane_req->fb_id) { 2590 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2591 if (!fb) { 2592 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2593 plane_req->fb_id); 2594 return -ENOENT; 2595 } 2596 2597 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2598 if (!crtc) { 2599 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2600 plane_req->crtc_id); 2601 return -ENOENT; 2602 } 2603 } 2604 2605 /* 2606 * setplane_internal will take care of deref'ing either the old or new 2607 * framebuffer depending on success. 2608 */ 2609 return setplane_internal(plane, crtc, fb, 2610 plane_req->crtc_x, plane_req->crtc_y, 2611 plane_req->crtc_w, plane_req->crtc_h, 2612 plane_req->src_x, plane_req->src_y, 2613 plane_req->src_w, plane_req->src_h); 2614 } 2615 2616 /** 2617 * drm_mode_set_config_internal - helper to call ->set_config 2618 * @set: modeset config to set 2619 * 2620 * This is a little helper to wrap internal calls to the ->set_config driver 2621 * interface. The only thing it adds is correct refcounting dance. 2622 * 2623 * Returns: 2624 * Zero on success, negative errno on failure. 2625 */ 2626 int drm_mode_set_config_internal(struct drm_mode_set *set) 2627 { 2628 struct drm_crtc *crtc = set->crtc; 2629 struct drm_framebuffer *fb; 2630 struct drm_crtc *tmp; 2631 int ret; 2632 2633 /* 2634 * NOTE: ->set_config can also disable other crtcs (if we steal all 2635 * connectors from it), hence we need to refcount the fbs across all 2636 * crtcs. Atomic modeset will have saner semantics ... 2637 */ 2638 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) 2639 tmp->primary->old_fb = tmp->primary->fb; 2640 2641 fb = set->fb; 2642 2643 ret = crtc->funcs->set_config(set); 2644 if (ret == 0) { 2645 crtc->primary->crtc = crtc; 2646 crtc->primary->fb = fb; 2647 } 2648 2649 list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) { 2650 if (tmp->primary->fb) 2651 drm_framebuffer_reference(tmp->primary->fb); 2652 if (tmp->primary->old_fb) 2653 drm_framebuffer_unreference(tmp->primary->old_fb); 2654 tmp->primary->old_fb = NULL; 2655 } 2656 2657 return ret; 2658 } 2659 EXPORT_SYMBOL(drm_mode_set_config_internal); 2660 2661 /** 2662 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode 2663 * @mode: mode to query 2664 * @hdisplay: hdisplay value to fill in 2665 * @vdisplay: vdisplay value to fill in 2666 * 2667 * The vdisplay value will be doubled if the specified mode is a stereo mode of 2668 * the appropriate layout. 2669 */ 2670 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, 2671 int *hdisplay, int *vdisplay) 2672 { 2673 struct drm_display_mode adjusted; 2674 2675 drm_mode_copy(&adjusted, mode); 2676 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 2677 *hdisplay = adjusted.crtc_hdisplay; 2678 *vdisplay = adjusted.crtc_vdisplay; 2679 } 2680 EXPORT_SYMBOL(drm_crtc_get_hv_timing); 2681 2682 /** 2683 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2684 * CRTC viewport 2685 * @crtc: CRTC that framebuffer will be displayed on 2686 * @x: x panning 2687 * @y: y panning 2688 * @mode: mode that framebuffer will be displayed under 2689 * @fb: framebuffer to check size of 2690 */ 2691 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2692 int x, int y, 2693 const struct drm_display_mode *mode, 2694 const struct drm_framebuffer *fb) 2695 2696 { 2697 int hdisplay, vdisplay; 2698 2699 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); 2700 2701 if (crtc->invert_dimensions) 2702 swap(hdisplay, vdisplay); 2703 2704 if (hdisplay > fb->width || 2705 vdisplay > fb->height || 2706 x > fb->width - hdisplay || 2707 y > fb->height - vdisplay) { 2708 DRM_DEBUG_KMS("Invalid fb size %ux%u for CRTC viewport %ux%u+%d+%d%s.\n", 2709 fb->width, fb->height, hdisplay, vdisplay, x, y, 2710 crtc->invert_dimensions ? " (inverted)" : ""); 2711 return -ENOSPC; 2712 } 2713 2714 return 0; 2715 } 2716 EXPORT_SYMBOL(drm_crtc_check_viewport); 2717 2718 /** 2719 * drm_mode_setcrtc - set CRTC configuration 2720 * @dev: drm device for the ioctl 2721 * @data: data pointer for the ioctl 2722 * @file_priv: drm file for the ioctl call 2723 * 2724 * Build a new CRTC configuration based on user request. 2725 * 2726 * Called by the user via ioctl. 2727 * 2728 * Returns: 2729 * Zero on success, negative errno on failure. 2730 */ 2731 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2732 struct drm_file *file_priv) 2733 { 2734 struct drm_mode_config *config = &dev->mode_config; 2735 struct drm_mode_crtc *crtc_req = data; 2736 struct drm_crtc *crtc; 2737 struct drm_connector **connector_set = NULL, *connector; 2738 struct drm_framebuffer *fb = NULL; 2739 struct drm_display_mode *mode = NULL; 2740 struct drm_mode_set set; 2741 uint32_t __user *set_connectors_ptr; 2742 int ret; 2743 int i; 2744 2745 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2746 return -EINVAL; 2747 2748 /* For some reason crtc x/y offsets are signed internally. */ 2749 if (crtc_req->x > INT_MAX || crtc_req->y > INT_MAX) 2750 return -ERANGE; 2751 2752 drm_modeset_lock_all(dev); 2753 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2754 if (!crtc) { 2755 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2756 ret = -ENOENT; 2757 goto out; 2758 } 2759 DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); 2760 2761 if (crtc_req->mode_valid) { 2762 /* If we have a mode we need a framebuffer. */ 2763 /* If we pass -1, set the mode with the currently bound fb */ 2764 if (crtc_req->fb_id == -1) { 2765 if (!crtc->primary->fb) { 2766 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2767 ret = -EINVAL; 2768 goto out; 2769 } 2770 fb = crtc->primary->fb; 2771 /* Make refcounting symmetric with the lookup path. */ 2772 drm_framebuffer_reference(fb); 2773 } else { 2774 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2775 if (!fb) { 2776 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2777 crtc_req->fb_id); 2778 ret = -ENOENT; 2779 goto out; 2780 } 2781 } 2782 2783 mode = drm_mode_create(dev); 2784 if (!mode) { 2785 ret = -ENOMEM; 2786 goto out; 2787 } 2788 2789 ret = drm_crtc_convert_umode(mode, &crtc_req->mode); 2790 if (ret) { 2791 DRM_DEBUG_KMS("Invalid mode\n"); 2792 goto out; 2793 } 2794 2795 mode->status = drm_mode_validate_basic(mode); 2796 if (mode->status != MODE_OK) { 2797 ret = -EINVAL; 2798 goto out; 2799 } 2800 2801 drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); 2802 2803 /* 2804 * Check whether the primary plane supports the fb pixel format. 2805 * Drivers not implementing the universal planes API use a 2806 * default formats list provided by the DRM core which doesn't 2807 * match real hardware capabilities. Skip the check in that 2808 * case. 2809 */ 2810 if (!crtc->primary->format_default) { 2811 ret = drm_plane_check_pixel_format(crtc->primary, 2812 fb->pixel_format); 2813 if (ret) { 2814 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2815 drm_get_format_name(fb->pixel_format)); 2816 goto out; 2817 } 2818 } 2819 2820 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2821 mode, fb); 2822 if (ret) 2823 goto out; 2824 2825 } 2826 2827 if (crtc_req->count_connectors == 0 && mode) { 2828 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2829 ret = -EINVAL; 2830 goto out; 2831 } 2832 2833 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2834 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2835 crtc_req->count_connectors); 2836 ret = -EINVAL; 2837 goto out; 2838 } 2839 2840 if (crtc_req->count_connectors > 0) { 2841 u32 out_id; 2842 2843 /* Avoid unbounded kernel memory allocation */ 2844 if (crtc_req->count_connectors > config->num_connector) { 2845 ret = -EINVAL; 2846 goto out; 2847 } 2848 2849 connector_set = kmalloc(crtc_req->count_connectors * 2850 sizeof(struct drm_connector *), 2851 M_DRM, M_WAITOK); 2852 if (!connector_set) { 2853 ret = -ENOMEM; 2854 goto out; 2855 } 2856 2857 for (i = 0; i < crtc_req->count_connectors; i++) { 2858 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2859 if (get_user(out_id, &set_connectors_ptr[i])) { 2860 ret = -EFAULT; 2861 goto out; 2862 } 2863 2864 connector = drm_connector_find(dev, out_id); 2865 if (!connector) { 2866 DRM_DEBUG_KMS("Connector id %d unknown\n", 2867 out_id); 2868 ret = -ENOENT; 2869 goto out; 2870 } 2871 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2872 connector->base.id, 2873 connector->name); 2874 2875 connector_set[i] = connector; 2876 } 2877 } 2878 2879 set.crtc = crtc; 2880 set.x = crtc_req->x; 2881 set.y = crtc_req->y; 2882 set.mode = mode; 2883 set.connectors = connector_set; 2884 set.num_connectors = crtc_req->count_connectors; 2885 set.fb = fb; 2886 ret = drm_mode_set_config_internal(&set); 2887 2888 out: 2889 if (fb) 2890 drm_framebuffer_unreference(fb); 2891 2892 kfree(connector_set); 2893 drm_mode_destroy(dev, mode); 2894 drm_modeset_unlock_all(dev); 2895 return ret; 2896 } 2897 2898 /** 2899 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 2900 * universal plane handler call 2901 * @crtc: crtc to update cursor for 2902 * @req: data pointer for the ioctl 2903 * @file_priv: drm file for the ioctl call 2904 * 2905 * Legacy cursor ioctl's work directly with driver buffer handles. To 2906 * translate legacy ioctl calls into universal plane handler calls, we need to 2907 * wrap the native buffer handle in a drm_framebuffer. 2908 * 2909 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 2910 * buffer with a pitch of 4*width; the universal plane interface should be used 2911 * directly in cases where the hardware can support other buffer settings and 2912 * userspace wants to make use of these capabilities. 2913 * 2914 * Returns: 2915 * Zero on success, negative errno on failure. 2916 */ 2917 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 2918 struct drm_mode_cursor2 *req, 2919 struct drm_file *file_priv) 2920 { 2921 struct drm_device *dev = crtc->dev; 2922 struct drm_framebuffer *fb = NULL; 2923 struct drm_mode_fb_cmd2 fbreq = { 2924 .width = req->width, 2925 .height = req->height, 2926 .pixel_format = DRM_FORMAT_ARGB8888, 2927 .pitches = { req->width * 4 }, 2928 .handles = { req->handle }, 2929 }; 2930 int32_t crtc_x, crtc_y; 2931 uint32_t crtc_w = 0, crtc_h = 0; 2932 uint32_t src_w = 0, src_h = 0; 2933 int ret = 0; 2934 2935 BUG_ON(!crtc->cursor); 2936 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 2937 2938 /* 2939 * Obtain fb we'll be using (either new or existing) and take an extra 2940 * reference to it if fb != null. setplane will take care of dropping 2941 * the reference if the plane update fails. 2942 */ 2943 if (req->flags & DRM_MODE_CURSOR_BO) { 2944 if (req->handle) { 2945 fb = internal_framebuffer_create(dev, &fbreq, file_priv); 2946 if (IS_ERR(fb)) { 2947 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 2948 return PTR_ERR(fb); 2949 } 2950 } else { 2951 fb = NULL; 2952 } 2953 } else { 2954 fb = crtc->cursor->fb; 2955 if (fb) 2956 drm_framebuffer_reference(fb); 2957 } 2958 2959 if (req->flags & DRM_MODE_CURSOR_MOVE) { 2960 crtc_x = req->x; 2961 crtc_y = req->y; 2962 } else { 2963 crtc_x = crtc->cursor_x; 2964 crtc_y = crtc->cursor_y; 2965 } 2966 2967 if (fb) { 2968 crtc_w = fb->width; 2969 crtc_h = fb->height; 2970 src_w = fb->width << 16; 2971 src_h = fb->height << 16; 2972 } 2973 2974 /* 2975 * setplane_internal will take care of deref'ing either the old or new 2976 * framebuffer depending on success. 2977 */ 2978 ret = __setplane_internal(crtc->cursor, crtc, fb, 2979 crtc_x, crtc_y, crtc_w, crtc_h, 2980 0, 0, src_w, src_h); 2981 2982 /* Update successful; save new cursor position, if necessary */ 2983 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 2984 crtc->cursor_x = req->x; 2985 crtc->cursor_y = req->y; 2986 } 2987 2988 return ret; 2989 } 2990 2991 static int drm_mode_cursor_common(struct drm_device *dev, 2992 struct drm_mode_cursor2 *req, 2993 struct drm_file *file_priv) 2994 { 2995 struct drm_crtc *crtc; 2996 int ret = 0; 2997 2998 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2999 return -EINVAL; 3000 3001 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 3002 return -EINVAL; 3003 3004 crtc = drm_crtc_find(dev, req->crtc_id); 3005 if (!crtc) { 3006 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 3007 return -ENOENT; 3008 } 3009 3010 /* 3011 * If this crtc has a universal cursor plane, call that plane's update 3012 * handler rather than using legacy cursor handlers. 3013 */ 3014 drm_modeset_lock_crtc(crtc, crtc->cursor); 3015 if (crtc->cursor) { 3016 ret = drm_mode_cursor_universal(crtc, req, file_priv); 3017 goto out; 3018 } 3019 3020 if (req->flags & DRM_MODE_CURSOR_BO) { 3021 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 3022 ret = -ENXIO; 3023 goto out; 3024 } 3025 /* Turns off the cursor if handle is 0 */ 3026 if (crtc->funcs->cursor_set2) 3027 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 3028 req->width, req->height, req->hot_x, req->hot_y); 3029 else 3030 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 3031 req->width, req->height); 3032 } 3033 3034 if (req->flags & DRM_MODE_CURSOR_MOVE) { 3035 if (crtc->funcs->cursor_move) { 3036 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 3037 } else { 3038 ret = -EFAULT; 3039 goto out; 3040 } 3041 } 3042 out: 3043 drm_modeset_unlock_crtc(crtc); 3044 3045 return ret; 3046 3047 } 3048 3049 3050 /** 3051 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 3052 * @dev: drm device for the ioctl 3053 * @data: data pointer for the ioctl 3054 * @file_priv: drm file for the ioctl call 3055 * 3056 * Set the cursor configuration based on user request. 3057 * 3058 * Called by the user via ioctl. 3059 * 3060 * Returns: 3061 * Zero on success, negative errno on failure. 3062 */ 3063 int drm_mode_cursor_ioctl(struct drm_device *dev, 3064 void *data, struct drm_file *file_priv) 3065 { 3066 struct drm_mode_cursor *req = data; 3067 struct drm_mode_cursor2 new_req; 3068 3069 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 3070 new_req.hot_x = new_req.hot_y = 0; 3071 3072 return drm_mode_cursor_common(dev, &new_req, file_priv); 3073 } 3074 3075 /** 3076 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 3077 * @dev: drm device for the ioctl 3078 * @data: data pointer for the ioctl 3079 * @file_priv: drm file for the ioctl call 3080 * 3081 * Set the cursor configuration based on user request. This implements the 2nd 3082 * version of the cursor ioctl, which allows userspace to additionally specify 3083 * the hotspot of the pointer. 3084 * 3085 * Called by the user via ioctl. 3086 * 3087 * Returns: 3088 * Zero on success, negative errno on failure. 3089 */ 3090 int drm_mode_cursor2_ioctl(struct drm_device *dev, 3091 void *data, struct drm_file *file_priv) 3092 { 3093 struct drm_mode_cursor2 *req = data; 3094 3095 return drm_mode_cursor_common(dev, req, file_priv); 3096 } 3097 3098 /** 3099 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 3100 * @bpp: bits per pixels 3101 * @depth: bit depth per pixel 3102 * 3103 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 3104 * Useful in fbdev emulation code, since that deals in those values. 3105 */ 3106 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 3107 { 3108 uint32_t fmt; 3109 3110 switch (bpp) { 3111 case 8: 3112 fmt = DRM_FORMAT_C8; 3113 break; 3114 case 16: 3115 if (depth == 15) 3116 fmt = DRM_FORMAT_XRGB1555; 3117 else 3118 fmt = DRM_FORMAT_RGB565; 3119 break; 3120 case 24: 3121 fmt = DRM_FORMAT_RGB888; 3122 break; 3123 case 32: 3124 if (depth == 24) 3125 fmt = DRM_FORMAT_XRGB8888; 3126 else if (depth == 30) 3127 fmt = DRM_FORMAT_XRGB2101010; 3128 else 3129 fmt = DRM_FORMAT_ARGB8888; 3130 break; 3131 default: 3132 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3133 fmt = DRM_FORMAT_XRGB8888; 3134 break; 3135 } 3136 3137 return fmt; 3138 } 3139 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3140 3141 /** 3142 * drm_mode_addfb - add an FB to the graphics configuration 3143 * @dev: drm device for the ioctl 3144 * @data: data pointer for the ioctl 3145 * @file_priv: drm file for the ioctl call 3146 * 3147 * Add a new FB to the specified CRTC, given a user request. This is the 3148 * original addfb ioctl which only supported RGB formats. 3149 * 3150 * Called by the user via ioctl. 3151 * 3152 * Returns: 3153 * Zero on success, negative errno on failure. 3154 */ 3155 int drm_mode_addfb(struct drm_device *dev, 3156 void *data, struct drm_file *file_priv) 3157 { 3158 struct drm_mode_fb_cmd *or = data; 3159 struct drm_mode_fb_cmd2 r = {}; 3160 int ret; 3161 3162 /* convert to new format and call new ioctl */ 3163 r.fb_id = or->fb_id; 3164 r.width = or->width; 3165 r.height = or->height; 3166 r.pitches[0] = or->pitch; 3167 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3168 r.handles[0] = or->handle; 3169 3170 ret = drm_mode_addfb2(dev, &r, file_priv); 3171 if (ret) 3172 return ret; 3173 3174 or->fb_id = r.fb_id; 3175 3176 return ret; 3177 } 3178 3179 static int format_check(const struct drm_mode_fb_cmd2 *r) 3180 { 3181 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3182 3183 switch (format) { 3184 case DRM_FORMAT_C8: 3185 case DRM_FORMAT_RGB332: 3186 case DRM_FORMAT_BGR233: 3187 case DRM_FORMAT_XRGB4444: 3188 case DRM_FORMAT_XBGR4444: 3189 case DRM_FORMAT_RGBX4444: 3190 case DRM_FORMAT_BGRX4444: 3191 case DRM_FORMAT_ARGB4444: 3192 case DRM_FORMAT_ABGR4444: 3193 case DRM_FORMAT_RGBA4444: 3194 case DRM_FORMAT_BGRA4444: 3195 case DRM_FORMAT_XRGB1555: 3196 case DRM_FORMAT_XBGR1555: 3197 case DRM_FORMAT_RGBX5551: 3198 case DRM_FORMAT_BGRX5551: 3199 case DRM_FORMAT_ARGB1555: 3200 case DRM_FORMAT_ABGR1555: 3201 case DRM_FORMAT_RGBA5551: 3202 case DRM_FORMAT_BGRA5551: 3203 case DRM_FORMAT_RGB565: 3204 case DRM_FORMAT_BGR565: 3205 case DRM_FORMAT_RGB888: 3206 case DRM_FORMAT_BGR888: 3207 case DRM_FORMAT_XRGB8888: 3208 case DRM_FORMAT_XBGR8888: 3209 case DRM_FORMAT_RGBX8888: 3210 case DRM_FORMAT_BGRX8888: 3211 case DRM_FORMAT_ARGB8888: 3212 case DRM_FORMAT_ABGR8888: 3213 case DRM_FORMAT_RGBA8888: 3214 case DRM_FORMAT_BGRA8888: 3215 case DRM_FORMAT_XRGB2101010: 3216 case DRM_FORMAT_XBGR2101010: 3217 case DRM_FORMAT_RGBX1010102: 3218 case DRM_FORMAT_BGRX1010102: 3219 case DRM_FORMAT_ARGB2101010: 3220 case DRM_FORMAT_ABGR2101010: 3221 case DRM_FORMAT_RGBA1010102: 3222 case DRM_FORMAT_BGRA1010102: 3223 case DRM_FORMAT_YUYV: 3224 case DRM_FORMAT_YVYU: 3225 case DRM_FORMAT_UYVY: 3226 case DRM_FORMAT_VYUY: 3227 case DRM_FORMAT_AYUV: 3228 case DRM_FORMAT_NV12: 3229 case DRM_FORMAT_NV21: 3230 case DRM_FORMAT_NV16: 3231 case DRM_FORMAT_NV61: 3232 case DRM_FORMAT_NV24: 3233 case DRM_FORMAT_NV42: 3234 case DRM_FORMAT_YUV410: 3235 case DRM_FORMAT_YVU410: 3236 case DRM_FORMAT_YUV411: 3237 case DRM_FORMAT_YVU411: 3238 case DRM_FORMAT_YUV420: 3239 case DRM_FORMAT_YVU420: 3240 case DRM_FORMAT_YUV422: 3241 case DRM_FORMAT_YVU422: 3242 case DRM_FORMAT_YUV444: 3243 case DRM_FORMAT_YVU444: 3244 return 0; 3245 default: 3246 DRM_DEBUG_KMS("invalid pixel format %s\n", 3247 drm_get_format_name(r->pixel_format)); 3248 return -EINVAL; 3249 } 3250 } 3251 3252 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3253 { 3254 int ret, hsub, vsub, num_planes, i; 3255 3256 ret = format_check(r); 3257 if (ret) { 3258 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3259 drm_get_format_name(r->pixel_format)); 3260 return ret; 3261 } 3262 3263 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3264 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3265 num_planes = drm_format_num_planes(r->pixel_format); 3266 3267 if (r->width == 0 || r->width % hsub) { 3268 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3269 return -EINVAL; 3270 } 3271 3272 if (r->height == 0 || r->height % vsub) { 3273 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3274 return -EINVAL; 3275 } 3276 3277 for (i = 0; i < num_planes; i++) { 3278 unsigned int width = r->width / (i != 0 ? hsub : 1); 3279 unsigned int height = r->height / (i != 0 ? vsub : 1); 3280 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3281 3282 if (!r->handles[i]) { 3283 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3284 return -EINVAL; 3285 } 3286 3287 if ((uint64_t) width * cpp > UINT_MAX) 3288 return -ERANGE; 3289 3290 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3291 return -ERANGE; 3292 3293 if (r->pitches[i] < width * cpp) { 3294 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3295 return -EINVAL; 3296 } 3297 3298 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { 3299 DRM_DEBUG_KMS("bad fb modifier %lu for plane %d\n", 3300 r->modifier[i], i); 3301 return -EINVAL; 3302 } 3303 } 3304 3305 return 0; 3306 } 3307 3308 static struct drm_framebuffer * 3309 internal_framebuffer_create(struct drm_device *dev, 3310 struct drm_mode_fb_cmd2 *r, 3311 struct drm_file *file_priv) 3312 { 3313 struct drm_mode_config *config = &dev->mode_config; 3314 struct drm_framebuffer *fb; 3315 int ret; 3316 3317 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { 3318 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3319 return ERR_PTR(-EINVAL); 3320 } 3321 3322 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3323 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3324 r->width, config->min_width, config->max_width); 3325 return ERR_PTR(-EINVAL); 3326 } 3327 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3328 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3329 r->height, config->min_height, config->max_height); 3330 return ERR_PTR(-EINVAL); 3331 } 3332 3333 if (r->flags & DRM_MODE_FB_MODIFIERS && 3334 !dev->mode_config.allow_fb_modifiers) { 3335 DRM_DEBUG_KMS("driver does not support fb modifiers\n"); 3336 return ERR_PTR(-EINVAL); 3337 } 3338 3339 ret = framebuffer_check(r); 3340 if (ret) 3341 return ERR_PTR(ret); 3342 3343 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3344 if (IS_ERR(fb)) { 3345 DRM_DEBUG_KMS("could not create framebuffer\n"); 3346 return fb; 3347 } 3348 3349 return fb; 3350 } 3351 3352 /** 3353 * drm_mode_addfb2 - add an FB to the graphics configuration 3354 * @dev: drm device for the ioctl 3355 * @data: data pointer for the ioctl 3356 * @file_priv: drm file for the ioctl call 3357 * 3358 * Add a new FB to the specified CRTC, given a user request with format. This is 3359 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3360 * and uses fourcc codes as pixel format specifiers. 3361 * 3362 * Called by the user via ioctl. 3363 * 3364 * Returns: 3365 * Zero on success, negative errno on failure. 3366 */ 3367 int drm_mode_addfb2(struct drm_device *dev, 3368 void *data, struct drm_file *file_priv) 3369 { 3370 struct drm_mode_fb_cmd2 *r = data; 3371 struct drm_framebuffer *fb; 3372 3373 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3374 return -EINVAL; 3375 3376 fb = internal_framebuffer_create(dev, r, file_priv); 3377 if (IS_ERR(fb)) 3378 return PTR_ERR(fb); 3379 3380 /* Transfer ownership to the filp for reaping on close */ 3381 3382 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3383 mutex_lock(&file_priv->fbs_lock); 3384 r->fb_id = fb->base.id; 3385 list_add(&fb->filp_head, &file_priv->fbs); 3386 mutex_unlock(&file_priv->fbs_lock); 3387 3388 return 0; 3389 } 3390 3391 /** 3392 * drm_mode_rmfb - remove an FB from the configuration 3393 * @dev: drm device for the ioctl 3394 * @data: data pointer for the ioctl 3395 * @file_priv: drm file for the ioctl call 3396 * 3397 * Remove the FB specified by the user. 3398 * 3399 * Called by the user via ioctl. 3400 * 3401 * Returns: 3402 * Zero on success, negative errno on failure. 3403 */ 3404 int drm_mode_rmfb(struct drm_device *dev, 3405 void *data, struct drm_file *file_priv) 3406 { 3407 struct drm_framebuffer *fb = NULL; 3408 struct drm_framebuffer *fbl = NULL; 3409 uint32_t *id = data; 3410 int found = 0; 3411 3412 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3413 return -EINVAL; 3414 3415 mutex_lock(&file_priv->fbs_lock); 3416 mutex_lock(&dev->mode_config.fb_lock); 3417 fb = __drm_framebuffer_lookup(dev, *id); 3418 if (!fb) 3419 goto fail_lookup; 3420 3421 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3422 if (fb == fbl) 3423 found = 1; 3424 if (!found) 3425 goto fail_lookup; 3426 3427 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ 3428 __drm_framebuffer_unregister(dev, fb); 3429 3430 list_del_init(&fb->filp_head); 3431 mutex_unlock(&dev->mode_config.fb_lock); 3432 mutex_unlock(&file_priv->fbs_lock); 3433 3434 drm_framebuffer_remove(fb); 3435 3436 return 0; 3437 3438 fail_lookup: 3439 mutex_unlock(&dev->mode_config.fb_lock); 3440 mutex_unlock(&file_priv->fbs_lock); 3441 3442 return -ENOENT; 3443 } 3444 3445 /** 3446 * drm_mode_getfb - get FB info 3447 * @dev: drm device for the ioctl 3448 * @data: data pointer for the ioctl 3449 * @file_priv: drm file for the ioctl call 3450 * 3451 * Lookup the FB given its ID and return info about it. 3452 * 3453 * Called by the user via ioctl. 3454 * 3455 * Returns: 3456 * Zero on success, negative errno on failure. 3457 */ 3458 int drm_mode_getfb(struct drm_device *dev, 3459 void *data, struct drm_file *file_priv) 3460 { 3461 struct drm_mode_fb_cmd *r = data; 3462 struct drm_framebuffer *fb; 3463 int ret; 3464 3465 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3466 return -EINVAL; 3467 3468 fb = drm_framebuffer_lookup(dev, r->fb_id); 3469 if (!fb) 3470 return -ENOENT; 3471 3472 r->height = fb->height; 3473 r->width = fb->width; 3474 r->depth = fb->depth; 3475 r->bpp = fb->bits_per_pixel; 3476 r->pitch = fb->pitches[0]; 3477 if (fb->funcs->create_handle) { 3478 ret = fb->funcs->create_handle(fb, file_priv, &r->handle); 3479 } else { 3480 ret = -ENODEV; 3481 } 3482 3483 drm_framebuffer_unreference(fb); 3484 3485 return ret; 3486 } 3487 3488 /** 3489 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3490 * @dev: drm device for the ioctl 3491 * @data: data pointer for the ioctl 3492 * @file_priv: drm file for the ioctl call 3493 * 3494 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3495 * rectangle list. Generic userspace which does frontbuffer rendering must call 3496 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3497 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3498 * 3499 * Modesetting drivers which always update the frontbuffer do not need to 3500 * implement the corresponding ->dirty framebuffer callback. 3501 * 3502 * Called by the user via ioctl. 3503 * 3504 * Returns: 3505 * Zero on success, negative errno on failure. 3506 */ 3507 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3508 void *data, struct drm_file *file_priv) 3509 { 3510 struct drm_clip_rect __user *clips_ptr; 3511 struct drm_clip_rect *clips = NULL; 3512 struct drm_mode_fb_dirty_cmd *r = data; 3513 struct drm_framebuffer *fb; 3514 unsigned flags; 3515 int num_clips; 3516 int ret; 3517 3518 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3519 return -EINVAL; 3520 3521 fb = drm_framebuffer_lookup(dev, r->fb_id); 3522 if (!fb) 3523 return -ENOENT; 3524 3525 num_clips = r->num_clips; 3526 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3527 3528 if (!num_clips != !clips_ptr) { 3529 ret = -EINVAL; 3530 goto out_err1; 3531 } 3532 3533 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3534 3535 /* If userspace annotates copy, clips must come in pairs */ 3536 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3537 ret = -EINVAL; 3538 goto out_err1; 3539 } 3540 3541 if (num_clips && clips_ptr) { 3542 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3543 ret = -EINVAL; 3544 goto out_err1; 3545 } 3546 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); 3547 if (!clips) { 3548 ret = -ENOMEM; 3549 goto out_err1; 3550 } 3551 3552 ret = copy_from_user(clips, clips_ptr, 3553 num_clips * sizeof(*clips)); 3554 if (ret) { 3555 ret = -EFAULT; 3556 goto out_err2; 3557 } 3558 } 3559 3560 if (fb->funcs->dirty) { 3561 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3562 clips, num_clips); 3563 } else { 3564 ret = -ENOSYS; 3565 } 3566 3567 out_err2: 3568 kfree(clips); 3569 out_err1: 3570 drm_framebuffer_unreference(fb); 3571 3572 return ret; 3573 } 3574 3575 3576 /** 3577 * drm_fb_release - remove and free the FBs on this file 3578 * @priv: drm file for the ioctl 3579 * 3580 * Destroy all the FBs associated with @filp. 3581 * 3582 * Called by the user via ioctl. 3583 * 3584 * Returns: 3585 * Zero on success, negative errno on failure. 3586 */ 3587 void drm_fb_release(struct drm_file *priv) 3588 { 3589 struct drm_device *dev = priv->dev; 3590 struct drm_framebuffer *fb, *tfb; 3591 3592 /* 3593 * When the file gets released that means no one else can access the fb 3594 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3595 * avoid upsetting lockdep since the universal cursor code adds a 3596 * framebuffer while holding mutex locks. 3597 * 3598 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3599 * locks is impossible here since no one else but this function can get 3600 * at it any more. 3601 */ 3602 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3603 3604 mutex_lock(&dev->mode_config.fb_lock); 3605 /* Mark fb as reaped, we still have a ref from fpriv->fbs. */ 3606 __drm_framebuffer_unregister(dev, fb); 3607 mutex_unlock(&dev->mode_config.fb_lock); 3608 3609 list_del_init(&fb->filp_head); 3610 3611 /* This will also drop the fpriv->fbs reference. */ 3612 drm_framebuffer_remove(fb); 3613 } 3614 } 3615 3616 /** 3617 * drm_property_create - create a new property type 3618 * @dev: drm device 3619 * @flags: flags specifying the property type 3620 * @name: name of the property 3621 * @num_values: number of pre-defined values 3622 * 3623 * This creates a new generic drm property which can then be attached to a drm 3624 * object with drm_object_attach_property. The returned property object must be 3625 * freed with drm_property_destroy. 3626 * 3627 * Note that the DRM core keeps a per-device list of properties and that, if 3628 * drm_mode_config_cleanup() is called, it will destroy all properties created 3629 * by the driver. 3630 * 3631 * Returns: 3632 * A pointer to the newly created property on success, NULL on failure. 3633 */ 3634 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3635 const char *name, int num_values) 3636 { 3637 struct drm_property *property = NULL; 3638 int ret; 3639 3640 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3641 if (!property) 3642 return NULL; 3643 3644 property->dev = dev; 3645 3646 if (num_values) { 3647 property->values = kcalloc(num_values, sizeof(uint64_t), 3648 GFP_KERNEL); 3649 if (!property->values) 3650 goto fail; 3651 } 3652 3653 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3654 if (ret) 3655 goto fail; 3656 3657 property->flags = flags; 3658 property->num_values = num_values; 3659 INIT_LIST_HEAD(&property->enum_list); 3660 3661 if (name) { 3662 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3663 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3664 } 3665 3666 list_add_tail(&property->head, &dev->mode_config.property_list); 3667 3668 WARN_ON(!drm_property_type_valid(property)); 3669 3670 return property; 3671 fail: 3672 kfree(property->values); 3673 kfree(property); 3674 return NULL; 3675 } 3676 EXPORT_SYMBOL(drm_property_create); 3677 3678 /** 3679 * drm_property_create_enum - create a new enumeration property type 3680 * @dev: drm device 3681 * @flags: flags specifying the property type 3682 * @name: name of the property 3683 * @props: enumeration lists with property values 3684 * @num_values: number of pre-defined values 3685 * 3686 * This creates a new generic drm property which can then be attached to a drm 3687 * object with drm_object_attach_property. The returned property object must be 3688 * freed with drm_property_destroy. 3689 * 3690 * Userspace is only allowed to set one of the predefined values for enumeration 3691 * properties. 3692 * 3693 * Returns: 3694 * A pointer to the newly created property on success, NULL on failure. 3695 */ 3696 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3697 const char *name, 3698 const struct drm_prop_enum_list *props, 3699 int num_values) 3700 { 3701 struct drm_property *property; 3702 int i, ret; 3703 3704 flags |= DRM_MODE_PROP_ENUM; 3705 3706 property = drm_property_create(dev, flags, name, num_values); 3707 if (!property) 3708 return NULL; 3709 3710 for (i = 0; i < num_values; i++) { 3711 ret = drm_property_add_enum(property, i, 3712 props[i].type, 3713 props[i].name); 3714 if (ret) { 3715 drm_property_destroy(dev, property); 3716 return NULL; 3717 } 3718 } 3719 3720 return property; 3721 } 3722 EXPORT_SYMBOL(drm_property_create_enum); 3723 3724 /** 3725 * drm_property_create_bitmask - create a new bitmask property type 3726 * @dev: drm device 3727 * @flags: flags specifying the property type 3728 * @name: name of the property 3729 * @props: enumeration lists with property bitflags 3730 * @num_props: size of the @props array 3731 * @supported_bits: bitmask of all supported enumeration values 3732 * 3733 * This creates a new bitmask drm property which can then be attached to a drm 3734 * object with drm_object_attach_property. The returned property object must be 3735 * freed with drm_property_destroy. 3736 * 3737 * Compared to plain enumeration properties userspace is allowed to set any 3738 * or'ed together combination of the predefined property bitflag values 3739 * 3740 * Returns: 3741 * A pointer to the newly created property on success, NULL on failure. 3742 */ 3743 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3744 int flags, const char *name, 3745 const struct drm_prop_enum_list *props, 3746 int num_props, 3747 uint64_t supported_bits) 3748 { 3749 struct drm_property *property; 3750 int i, ret, index = 0; 3751 int num_values = hweight64(supported_bits); 3752 3753 flags |= DRM_MODE_PROP_BITMASK; 3754 3755 property = drm_property_create(dev, flags, name, num_values); 3756 if (!property) 3757 return NULL; 3758 for (i = 0; i < num_props; i++) { 3759 if (!(supported_bits & (1ULL << props[i].type))) 3760 continue; 3761 3762 if (WARN_ON(index >= num_values)) { 3763 drm_property_destroy(dev, property); 3764 return NULL; 3765 } 3766 3767 ret = drm_property_add_enum(property, index++, 3768 props[i].type, 3769 props[i].name); 3770 if (ret) { 3771 drm_property_destroy(dev, property); 3772 return NULL; 3773 } 3774 } 3775 3776 return property; 3777 } 3778 EXPORT_SYMBOL(drm_property_create_bitmask); 3779 3780 static struct drm_property *property_create_range(struct drm_device *dev, 3781 int flags, const char *name, 3782 uint64_t min, uint64_t max) 3783 { 3784 struct drm_property *property; 3785 3786 property = drm_property_create(dev, flags, name, 2); 3787 if (!property) 3788 return NULL; 3789 3790 property->values[0] = min; 3791 property->values[1] = max; 3792 3793 return property; 3794 } 3795 3796 /** 3797 * drm_property_create_range - create a new unsigned ranged property type 3798 * @dev: drm device 3799 * @flags: flags specifying the property type 3800 * @name: name of the property 3801 * @min: minimum value of the property 3802 * @max: maximum value of the property 3803 * 3804 * This creates a new generic drm property which can then be attached to a drm 3805 * object with drm_object_attach_property. The returned property object must be 3806 * freed with drm_property_destroy. 3807 * 3808 * Userspace is allowed to set any unsigned integer value in the (min, max) 3809 * range inclusive. 3810 * 3811 * Returns: 3812 * A pointer to the newly created property on success, NULL on failure. 3813 */ 3814 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 3815 const char *name, 3816 uint64_t min, uint64_t max) 3817 { 3818 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 3819 name, min, max); 3820 } 3821 EXPORT_SYMBOL(drm_property_create_range); 3822 3823 /** 3824 * drm_property_create_signed_range - create a new signed ranged property type 3825 * @dev: drm device 3826 * @flags: flags specifying the property type 3827 * @name: name of the property 3828 * @min: minimum value of the property 3829 * @max: maximum value of the property 3830 * 3831 * This creates a new generic drm property which can then be attached to a drm 3832 * object with drm_object_attach_property. The returned property object must be 3833 * freed with drm_property_destroy. 3834 * 3835 * Userspace is allowed to set any signed integer value in the (min, max) 3836 * range inclusive. 3837 * 3838 * Returns: 3839 * A pointer to the newly created property on success, NULL on failure. 3840 */ 3841 struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 3842 int flags, const char *name, 3843 int64_t min, int64_t max) 3844 { 3845 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 3846 name, I642U64(min), I642U64(max)); 3847 } 3848 EXPORT_SYMBOL(drm_property_create_signed_range); 3849 3850 /** 3851 * drm_property_create_object - create a new object property type 3852 * @dev: drm device 3853 * @flags: flags specifying the property type 3854 * @name: name of the property 3855 * @type: object type from DRM_MODE_OBJECT_* defines 3856 * 3857 * This creates a new generic drm property which can then be attached to a drm 3858 * object with drm_object_attach_property. The returned property object must be 3859 * freed with drm_property_destroy. 3860 * 3861 * Userspace is only allowed to set this to any property value of the given 3862 * @type. Only useful for atomic properties, which is enforced. 3863 * 3864 * Returns: 3865 * A pointer to the newly created property on success, NULL on failure. 3866 */ 3867 struct drm_property *drm_property_create_object(struct drm_device *dev, 3868 int flags, const char *name, uint32_t type) 3869 { 3870 struct drm_property *property; 3871 3872 flags |= DRM_MODE_PROP_OBJECT; 3873 3874 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) 3875 return NULL; 3876 3877 property = drm_property_create(dev, flags, name, 1); 3878 if (!property) 3879 return NULL; 3880 3881 property->values[0] = type; 3882 3883 return property; 3884 } 3885 EXPORT_SYMBOL(drm_property_create_object); 3886 3887 /** 3888 * drm_property_create_bool - create a new boolean property type 3889 * @dev: drm device 3890 * @flags: flags specifying the property type 3891 * @name: name of the property 3892 * 3893 * This creates a new generic drm property which can then be attached to a drm 3894 * object with drm_object_attach_property. The returned property object must be 3895 * freed with drm_property_destroy. 3896 * 3897 * This is implemented as a ranged property with only {0, 1} as valid values. 3898 * 3899 * Returns: 3900 * A pointer to the newly created property on success, NULL on failure. 3901 */ 3902 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, 3903 const char *name) 3904 { 3905 return drm_property_create_range(dev, flags, name, 0, 1); 3906 } 3907 EXPORT_SYMBOL(drm_property_create_bool); 3908 3909 /** 3910 * drm_property_add_enum - add a possible value to an enumeration property 3911 * @property: enumeration property to change 3912 * @index: index of the new enumeration 3913 * @value: value of the new enumeration 3914 * @name: symbolic name of the new enumeration 3915 * 3916 * This functions adds enumerations to a property. 3917 * 3918 * It's use is deprecated, drivers should use one of the more specific helpers 3919 * to directly create the property with all enumerations already attached. 3920 * 3921 * Returns: 3922 * Zero on success, error code on failure. 3923 */ 3924 int drm_property_add_enum(struct drm_property *property, int index, 3925 uint64_t value, const char *name) 3926 { 3927 struct drm_property_enum *prop_enum; 3928 3929 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 3930 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 3931 return -EINVAL; 3932 3933 /* 3934 * Bitmask enum properties have the additional constraint of values 3935 * from 0 to 63 3936 */ 3937 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 3938 (value > 63)) 3939 return -EINVAL; 3940 3941 if (!list_empty(&property->enum_list)) { 3942 list_for_each_entry(prop_enum, &property->enum_list, head) { 3943 if (prop_enum->value == value) { 3944 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3945 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3946 return 0; 3947 } 3948 } 3949 } 3950 3951 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 3952 if (!prop_enum) 3953 return -ENOMEM; 3954 3955 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 3956 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 3957 prop_enum->value = value; 3958 3959 property->values[index] = value; 3960 list_add_tail(&prop_enum->head, &property->enum_list); 3961 return 0; 3962 } 3963 EXPORT_SYMBOL(drm_property_add_enum); 3964 3965 /** 3966 * drm_property_destroy - destroy a drm property 3967 * @dev: drm device 3968 * @property: property to destry 3969 * 3970 * This function frees a property including any attached resources like 3971 * enumeration values. 3972 */ 3973 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 3974 { 3975 struct drm_property_enum *prop_enum, *pt; 3976 3977 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 3978 list_del(&prop_enum->head); 3979 kfree(prop_enum); 3980 } 3981 3982 if (property->num_values) 3983 kfree(property->values); 3984 drm_mode_object_put(dev, &property->base); 3985 list_del(&property->head); 3986 kfree(property); 3987 } 3988 EXPORT_SYMBOL(drm_property_destroy); 3989 3990 /** 3991 * drm_object_attach_property - attach a property to a modeset object 3992 * @obj: drm modeset object 3993 * @property: property to attach 3994 * @init_val: initial value of the property 3995 * 3996 * This attaches the given property to the modeset object with the given initial 3997 * value. Currently this function cannot fail since the properties are stored in 3998 * a statically sized array. 3999 */ 4000 void drm_object_attach_property(struct drm_mode_object *obj, 4001 struct drm_property *property, 4002 uint64_t init_val) 4003 { 4004 int count = obj->properties->count; 4005 4006 if (count == DRM_OBJECT_MAX_PROPERTY) { 4007 WARN(1, "Failed to attach object property (type: 0x%x). Please " 4008 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 4009 "you see this message on the same object type.\n", 4010 obj->type); 4011 return; 4012 } 4013 4014 obj->properties->properties[count] = property; 4015 obj->properties->values[count] = init_val; 4016 obj->properties->count++; 4017 if (property->flags & DRM_MODE_PROP_ATOMIC) 4018 obj->properties->atomic_count++; 4019 } 4020 EXPORT_SYMBOL(drm_object_attach_property); 4021 4022 /** 4023 * drm_object_property_set_value - set the value of a property 4024 * @obj: drm mode object to set property value for 4025 * @property: property to set 4026 * @val: value the property should be set to 4027 * 4028 * This functions sets a given property on a given object. This function only 4029 * changes the software state of the property, it does not call into the 4030 * driver's ->set_property callback. 4031 * 4032 * Returns: 4033 * Zero on success, error code on failure. 4034 */ 4035 int drm_object_property_set_value(struct drm_mode_object *obj, 4036 struct drm_property *property, uint64_t val) 4037 { 4038 int i; 4039 4040 for (i = 0; i < obj->properties->count; i++) { 4041 if (obj->properties->properties[i] == property) { 4042 obj->properties->values[i] = val; 4043 return 0; 4044 } 4045 } 4046 4047 return -EINVAL; 4048 } 4049 EXPORT_SYMBOL(drm_object_property_set_value); 4050 4051 /** 4052 * drm_object_property_get_value - retrieve the value of a property 4053 * @obj: drm mode object to get property value from 4054 * @property: property to retrieve 4055 * @val: storage for the property value 4056 * 4057 * This function retrieves the softare state of the given property for the given 4058 * property. Since there is no driver callback to retrieve the current property 4059 * value this might be out of sync with the hardware, depending upon the driver 4060 * and property. 4061 * 4062 * Returns: 4063 * Zero on success, error code on failure. 4064 */ 4065 int drm_object_property_get_value(struct drm_mode_object *obj, 4066 struct drm_property *property, uint64_t *val) 4067 { 4068 int i; 4069 4070 /* read-only properties bypass atomic mechanism and still store 4071 * their value in obj->properties->values[].. mostly to avoid 4072 * having to deal w/ EDID and similar props in atomic paths: 4073 */ 4074 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && 4075 !(property->flags & DRM_MODE_PROP_IMMUTABLE)) 4076 return drm_atomic_get_property(obj, property, val); 4077 4078 for (i = 0; i < obj->properties->count; i++) { 4079 if (obj->properties->properties[i] == property) { 4080 *val = obj->properties->values[i]; 4081 return 0; 4082 } 4083 } 4084 4085 return -EINVAL; 4086 } 4087 EXPORT_SYMBOL(drm_object_property_get_value); 4088 4089 /** 4090 * drm_mode_getproperty_ioctl - get the property metadata 4091 * @dev: DRM device 4092 * @data: ioctl data 4093 * @file_priv: DRM file info 4094 * 4095 * This function retrieves the metadata for a given property, like the different 4096 * possible values for an enum property or the limits for a range property. 4097 * 4098 * Blob properties are special 4099 * 4100 * Called by the user via ioctl. 4101 * 4102 * Returns: 4103 * Zero on success, negative errno on failure. 4104 */ 4105 int drm_mode_getproperty_ioctl(struct drm_device *dev, 4106 void *data, struct drm_file *file_priv) 4107 { 4108 struct drm_mode_get_property *out_resp = data; 4109 struct drm_property *property; 4110 int enum_count = 0; 4111 int value_count = 0; 4112 int ret = 0, i; 4113 int copied; 4114 struct drm_property_enum *prop_enum; 4115 struct drm_mode_property_enum __user *enum_ptr; 4116 uint64_t __user *values_ptr; 4117 4118 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4119 return -EINVAL; 4120 4121 drm_modeset_lock_all(dev); 4122 property = drm_property_find(dev, out_resp->prop_id); 4123 if (!property) { 4124 ret = -ENOENT; 4125 goto done; 4126 } 4127 4128 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4129 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4130 list_for_each_entry(prop_enum, &property->enum_list, head) 4131 enum_count++; 4132 } 4133 4134 value_count = property->num_values; 4135 4136 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 4137 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 4138 out_resp->flags = property->flags; 4139 4140 if ((out_resp->count_values >= value_count) && value_count) { 4141 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 4142 for (i = 0; i < value_count; i++) { 4143 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 4144 ret = -EFAULT; 4145 goto done; 4146 } 4147 } 4148 } 4149 out_resp->count_values = value_count; 4150 4151 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4152 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4153 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 4154 copied = 0; 4155 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 4156 list_for_each_entry(prop_enum, &property->enum_list, head) { 4157 4158 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 4159 ret = -EFAULT; 4160 goto done; 4161 } 4162 4163 if (copy_to_user(&enum_ptr[copied].name, 4164 &prop_enum->name, DRM_PROP_NAME_LEN)) { 4165 ret = -EFAULT; 4166 goto done; 4167 } 4168 copied++; 4169 } 4170 } 4171 out_resp->count_enum_blobs = enum_count; 4172 } 4173 4174 /* 4175 * NOTE: The idea seems to have been to use this to read all the blob 4176 * property values. But nothing ever added them to the corresponding 4177 * list, userspace always used the special-purpose get_blob ioctl to 4178 * read the value for a blob property. It also doesn't make a lot of 4179 * sense to return values here when everything else is just metadata for 4180 * the property itself. 4181 */ 4182 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4183 out_resp->count_enum_blobs = 0; 4184 done: 4185 drm_modeset_unlock_all(dev); 4186 return ret; 4187 } 4188 4189 static struct drm_property_blob * 4190 drm_property_create_blob(struct drm_device *dev, size_t length, 4191 const void *data) 4192 { 4193 struct drm_property_blob *blob; 4194 int ret; 4195 4196 if (!length || !data) 4197 return NULL; 4198 4199 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4200 if (!blob) 4201 return NULL; 4202 4203 ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB); 4204 if (ret) { 4205 kfree(blob); 4206 return NULL; 4207 } 4208 4209 blob->length = length; 4210 4211 memcpy(blob->data, data, length); 4212 4213 list_add_tail(&blob->head, &dev->mode_config.property_blob_list); 4214 return blob; 4215 } 4216 4217 static void drm_property_destroy_blob(struct drm_device *dev, 4218 struct drm_property_blob *blob) 4219 { 4220 drm_mode_object_put(dev, &blob->base); 4221 list_del(&blob->head); 4222 kfree(blob); 4223 } 4224 4225 /** 4226 * drm_mode_getblob_ioctl - get the contents of a blob property value 4227 * @dev: DRM device 4228 * @data: ioctl data 4229 * @file_priv: DRM file info 4230 * 4231 * This function retrieves the contents of a blob property. The value stored in 4232 * an object's blob property is just a normal modeset object id. 4233 * 4234 * Called by the user via ioctl. 4235 * 4236 * Returns: 4237 * Zero on success, negative errno on failure. 4238 */ 4239 int drm_mode_getblob_ioctl(struct drm_device *dev, 4240 void *data, struct drm_file *file_priv) 4241 { 4242 struct drm_mode_get_blob *out_resp = data; 4243 struct drm_property_blob *blob; 4244 int ret = 0; 4245 void __user *blob_ptr; 4246 4247 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4248 return -EINVAL; 4249 4250 drm_modeset_lock_all(dev); 4251 blob = drm_property_blob_find(dev, out_resp->blob_id); 4252 if (!blob) { 4253 ret = -ENOENT; 4254 goto done; 4255 } 4256 4257 if (out_resp->length == blob->length) { 4258 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4259 if (copy_to_user(blob_ptr, blob->data, blob->length)) { 4260 ret = -EFAULT; 4261 goto done; 4262 } 4263 } 4264 out_resp->length = blob->length; 4265 4266 done: 4267 drm_modeset_unlock_all(dev); 4268 return ret; 4269 } 4270 4271 /** 4272 * drm_mode_connector_set_path_property - set tile property on connector 4273 * @connector: connector to set property on. 4274 * @path: path to use for property. 4275 * 4276 * This creates a property to expose to userspace to specify a 4277 * connector path. This is mainly used for DisplayPort MST where 4278 * connectors have a topology and we want to allow userspace to give 4279 * them more meaningful names. 4280 * 4281 * Returns: 4282 * Zero on success, negative errno on failure. 4283 */ 4284 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4285 const char *path) 4286 { 4287 struct drm_device *dev = connector->dev; 4288 size_t size = strlen(path) + 1; 4289 int ret; 4290 4291 connector->path_blob_ptr = drm_property_create_blob(connector->dev, 4292 size, path); 4293 if (!connector->path_blob_ptr) 4294 return -EINVAL; 4295 4296 ret = drm_object_property_set_value(&connector->base, 4297 dev->mode_config.path_property, 4298 connector->path_blob_ptr->base.id); 4299 return ret; 4300 } 4301 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4302 4303 /** 4304 * drm_mode_connector_set_tile_property - set tile property on connector 4305 * @connector: connector to set property on. 4306 * 4307 * This looks up the tile information for a connector, and creates a 4308 * property for userspace to parse if it exists. The property is of 4309 * the form of 8 integers using ':' as a separator. 4310 * 4311 * Returns: 4312 * Zero on success, errno on failure. 4313 */ 4314 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4315 { 4316 struct drm_device *dev = connector->dev; 4317 int ret, size; 4318 char tile[256]; 4319 4320 if (connector->tile_blob_ptr) 4321 drm_property_destroy_blob(dev, connector->tile_blob_ptr); 4322 4323 if (!connector->has_tile) { 4324 connector->tile_blob_ptr = NULL; 4325 ret = drm_object_property_set_value(&connector->base, 4326 dev->mode_config.tile_property, 0); 4327 return ret; 4328 } 4329 4330 ksnprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4331 connector->tile_group->id, connector->tile_is_single_monitor, 4332 connector->num_h_tile, connector->num_v_tile, 4333 connector->tile_h_loc, connector->tile_v_loc, 4334 connector->tile_h_size, connector->tile_v_size); 4335 size = strlen(tile) + 1; 4336 4337 connector->tile_blob_ptr = drm_property_create_blob(connector->dev, 4338 size, tile); 4339 if (!connector->tile_blob_ptr) 4340 return -EINVAL; 4341 4342 ret = drm_object_property_set_value(&connector->base, 4343 dev->mode_config.tile_property, 4344 connector->tile_blob_ptr->base.id); 4345 return ret; 4346 } 4347 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4348 4349 /** 4350 * drm_mode_connector_update_edid_property - update the edid property of a connector 4351 * @connector: drm connector 4352 * @edid: new value of the edid property 4353 * 4354 * This function creates a new blob modeset object and assigns its id to the 4355 * connector's edid property. 4356 * 4357 * Returns: 4358 * Zero on success, negative errno on failure. 4359 */ 4360 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4361 const struct edid *edid) 4362 { 4363 struct drm_device *dev = connector->dev; 4364 size_t size; 4365 int ret; 4366 4367 /* ignore requests to set edid when overridden */ 4368 if (connector->override_edid) 4369 return 0; 4370 4371 if (connector->edid_blob_ptr) 4372 drm_property_destroy_blob(dev, connector->edid_blob_ptr); 4373 4374 /* Delete edid, when there is none. */ 4375 if (!edid) { 4376 connector->edid_blob_ptr = NULL; 4377 ret = drm_object_property_set_value(&connector->base, dev->mode_config.edid_property, 0); 4378 return ret; 4379 } 4380 4381 size = EDID_LENGTH * (1 + edid->extensions); 4382 connector->edid_blob_ptr = drm_property_create_blob(connector->dev, 4383 size, edid); 4384 if (!connector->edid_blob_ptr) 4385 return -EINVAL; 4386 4387 ret = drm_object_property_set_value(&connector->base, 4388 dev->mode_config.edid_property, 4389 connector->edid_blob_ptr->base.id); 4390 4391 return ret; 4392 } 4393 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4394 4395 /* Some properties could refer to dynamic refcnt'd objects, or things that 4396 * need special locking to handle lifetime issues (ie. to ensure the prop 4397 * value doesn't become invalid part way through the property update due to 4398 * race). The value returned by reference via 'obj' should be passed back 4399 * to drm_property_change_valid_put() after the property is set (and the 4400 * object to which the property is attached has a chance to take it's own 4401 * reference). 4402 */ 4403 bool drm_property_change_valid_get(struct drm_property *property, 4404 uint64_t value, struct drm_mode_object **ref) 4405 { 4406 int i; 4407 4408 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4409 return false; 4410 4411 *ref = NULL; 4412 4413 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4414 if (value < property->values[0] || value > property->values[1]) 4415 return false; 4416 return true; 4417 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4418 int64_t svalue = U642I64(value); 4419 4420 if (svalue < U642I64(property->values[0]) || 4421 svalue > U642I64(property->values[1])) 4422 return false; 4423 return true; 4424 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4425 uint64_t valid_mask = 0; 4426 4427 for (i = 0; i < property->num_values; i++) 4428 valid_mask |= (1ULL << property->values[i]); 4429 return !(value & ~valid_mask); 4430 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4431 /* Only the driver knows */ 4432 return true; 4433 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4434 /* a zero value for an object property translates to null: */ 4435 if (value == 0) 4436 return true; 4437 4438 /* handle refcnt'd objects specially: */ 4439 if (property->values[0] == DRM_MODE_OBJECT_FB) { 4440 struct drm_framebuffer *fb; 4441 fb = drm_framebuffer_lookup(property->dev, value); 4442 if (fb) { 4443 *ref = &fb->base; 4444 return true; 4445 } else { 4446 return false; 4447 } 4448 } else { 4449 return _object_find(property->dev, value, property->values[0]) != NULL; 4450 } 4451 } 4452 4453 for (i = 0; i < property->num_values; i++) 4454 if (property->values[i] == value) 4455 return true; 4456 return false; 4457 } 4458 4459 void drm_property_change_valid_put(struct drm_property *property, 4460 struct drm_mode_object *ref) 4461 { 4462 if (!ref) 4463 return; 4464 4465 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4466 if (property->values[0] == DRM_MODE_OBJECT_FB) 4467 drm_framebuffer_unreference(obj_to_fb(ref)); 4468 } 4469 } 4470 4471 /** 4472 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4473 * @dev: DRM device 4474 * @data: ioctl data 4475 * @file_priv: DRM file info 4476 * 4477 * This function sets the current value for a connectors's property. It also 4478 * calls into a driver's ->set_property callback to update the hardware state 4479 * 4480 * Called by the user via ioctl. 4481 * 4482 * Returns: 4483 * Zero on success, negative errno on failure. 4484 */ 4485 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4486 void *data, struct drm_file *file_priv) 4487 { 4488 struct drm_mode_connector_set_property *conn_set_prop = data; 4489 struct drm_mode_obj_set_property obj_set_prop = { 4490 .value = conn_set_prop->value, 4491 .prop_id = conn_set_prop->prop_id, 4492 .obj_id = conn_set_prop->connector_id, 4493 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4494 }; 4495 4496 /* It does all the locking and checking we need */ 4497 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4498 } 4499 4500 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4501 struct drm_property *property, 4502 uint64_t value) 4503 { 4504 int ret = -EINVAL; 4505 struct drm_connector *connector = obj_to_connector(obj); 4506 4507 /* Do DPMS ourselves */ 4508 if (property == connector->dev->mode_config.dpms_property) { 4509 if (connector->funcs->dpms) 4510 (*connector->funcs->dpms)(connector, (int)value); 4511 ret = 0; 4512 } else if (connector->funcs->set_property) 4513 ret = connector->funcs->set_property(connector, property, value); 4514 4515 /* store the property value if successful */ 4516 if (!ret) 4517 drm_object_property_set_value(&connector->base, property, value); 4518 return ret; 4519 } 4520 4521 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4522 struct drm_property *property, 4523 uint64_t value) 4524 { 4525 int ret = -EINVAL; 4526 struct drm_crtc *crtc = obj_to_crtc(obj); 4527 4528 if (crtc->funcs->set_property) 4529 ret = crtc->funcs->set_property(crtc, property, value); 4530 if (!ret) 4531 drm_object_property_set_value(obj, property, value); 4532 4533 return ret; 4534 } 4535 4536 /** 4537 * drm_mode_plane_set_obj_prop - set the value of a property 4538 * @plane: drm plane object to set property value for 4539 * @property: property to set 4540 * @value: value the property should be set to 4541 * 4542 * This functions sets a given property on a given plane object. This function 4543 * calls the driver's ->set_property callback and changes the software state of 4544 * the property if the callback succeeds. 4545 * 4546 * Returns: 4547 * Zero on success, error code on failure. 4548 */ 4549 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 4550 struct drm_property *property, 4551 uint64_t value) 4552 { 4553 int ret = -EINVAL; 4554 struct drm_mode_object *obj = &plane->base; 4555 4556 if (plane->funcs->set_property) 4557 ret = plane->funcs->set_property(plane, property, value); 4558 if (!ret) 4559 drm_object_property_set_value(obj, property, value); 4560 4561 return ret; 4562 } 4563 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 4564 4565 /** 4566 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 4567 * @dev: DRM device 4568 * @data: ioctl data 4569 * @file_priv: DRM file info 4570 * 4571 * This function retrieves the current value for an object's property. Compared 4572 * to the connector specific ioctl this one is extended to also work on crtc and 4573 * plane objects. 4574 * 4575 * Called by the user via ioctl. 4576 * 4577 * Returns: 4578 * Zero on success, negative errno on failure. 4579 */ 4580 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 4581 struct drm_file *file_priv) 4582 { 4583 struct drm_mode_obj_get_properties *arg = data; 4584 struct drm_mode_object *obj; 4585 int ret = 0; 4586 4587 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4588 return -EINVAL; 4589 4590 drm_modeset_lock_all(dev); 4591 4592 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4593 if (!obj) { 4594 ret = -ENOENT; 4595 goto out; 4596 } 4597 if (!obj->properties) { 4598 ret = -EINVAL; 4599 goto out; 4600 } 4601 4602 ret = get_properties(obj, file_priv->atomic, 4603 (uint32_t __user *)(unsigned long)(arg->props_ptr), 4604 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), 4605 &arg->count_props); 4606 4607 out: 4608 drm_modeset_unlock_all(dev); 4609 return ret; 4610 } 4611 4612 /** 4613 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 4614 * @dev: DRM device 4615 * @data: ioctl data 4616 * @file_priv: DRM file info 4617 * 4618 * This function sets the current value for an object's property. It also calls 4619 * into a driver's ->set_property callback to update the hardware state. 4620 * Compared to the connector specific ioctl this one is extended to also work on 4621 * crtc and plane objects. 4622 * 4623 * Called by the user via ioctl. 4624 * 4625 * Returns: 4626 * Zero on success, negative errno on failure. 4627 */ 4628 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 4629 struct drm_file *file_priv) 4630 { 4631 struct drm_mode_obj_set_property *arg = data; 4632 struct drm_mode_object *arg_obj; 4633 struct drm_mode_object *prop_obj; 4634 struct drm_property *property; 4635 int i, ret = -EINVAL; 4636 struct drm_mode_object *ref; 4637 4638 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4639 return -EINVAL; 4640 4641 drm_modeset_lock_all(dev); 4642 4643 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 4644 if (!arg_obj) { 4645 ret = -ENOENT; 4646 goto out; 4647 } 4648 if (!arg_obj->properties) 4649 goto out; 4650 4651 for (i = 0; i < arg_obj->properties->count; i++) 4652 if (arg_obj->properties->properties[i]->base.id == arg->prop_id) 4653 break; 4654 4655 if (i == arg_obj->properties->count) 4656 goto out; 4657 4658 prop_obj = drm_mode_object_find(dev, arg->prop_id, 4659 DRM_MODE_OBJECT_PROPERTY); 4660 if (!prop_obj) { 4661 ret = -ENOENT; 4662 goto out; 4663 } 4664 property = obj_to_property(prop_obj); 4665 4666 if (!drm_property_change_valid_get(property, arg->value, &ref)) 4667 goto out; 4668 4669 switch (arg_obj->type) { 4670 case DRM_MODE_OBJECT_CONNECTOR: 4671 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 4672 arg->value); 4673 break; 4674 case DRM_MODE_OBJECT_CRTC: 4675 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 4676 break; 4677 case DRM_MODE_OBJECT_PLANE: 4678 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 4679 property, arg->value); 4680 break; 4681 } 4682 4683 drm_property_change_valid_put(property, ref); 4684 4685 out: 4686 drm_modeset_unlock_all(dev); 4687 return ret; 4688 } 4689 4690 /** 4691 * drm_mode_connector_attach_encoder - attach a connector to an encoder 4692 * @connector: connector to attach 4693 * @encoder: encoder to attach @connector to 4694 * 4695 * This function links up a connector to an encoder. Note that the routing 4696 * restrictions between encoders and crtcs are exposed to userspace through the 4697 * possible_clones and possible_crtcs bitmasks. 4698 * 4699 * Returns: 4700 * Zero on success, negative errno on failure. 4701 */ 4702 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 4703 struct drm_encoder *encoder) 4704 { 4705 int i; 4706 4707 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 4708 if (connector->encoder_ids[i] == 0) { 4709 connector->encoder_ids[i] = encoder->base.id; 4710 return 0; 4711 } 4712 } 4713 return -ENOMEM; 4714 } 4715 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 4716 4717 /** 4718 * drm_mode_crtc_set_gamma_size - set the gamma table size 4719 * @crtc: CRTC to set the gamma table size for 4720 * @gamma_size: size of the gamma table 4721 * 4722 * Drivers which support gamma tables should set this to the supported gamma 4723 * table size when initializing the CRTC. Currently the drm core only supports a 4724 * fixed gamma table size. 4725 * 4726 * Returns: 4727 * Zero on success, negative errno on failure. 4728 */ 4729 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 4730 int gamma_size) 4731 { 4732 crtc->gamma_size = gamma_size; 4733 4734 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, 4735 GFP_KERNEL); 4736 if (!crtc->gamma_store) { 4737 crtc->gamma_size = 0; 4738 return -ENOMEM; 4739 } 4740 4741 return 0; 4742 } 4743 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 4744 4745 /** 4746 * drm_mode_gamma_set_ioctl - set the gamma table 4747 * @dev: DRM device 4748 * @data: ioctl data 4749 * @file_priv: DRM file info 4750 * 4751 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 4752 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 4753 * 4754 * Called by the user via ioctl. 4755 * 4756 * Returns: 4757 * Zero on success, negative errno on failure. 4758 */ 4759 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 4760 void *data, struct drm_file *file_priv) 4761 { 4762 struct drm_mode_crtc_lut *crtc_lut = data; 4763 struct drm_crtc *crtc; 4764 void *r_base, *g_base, *b_base; 4765 int size; 4766 int ret = 0; 4767 4768 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4769 return -EINVAL; 4770 4771 drm_modeset_lock_all(dev); 4772 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 4773 if (!crtc) { 4774 ret = -ENOENT; 4775 goto out; 4776 } 4777 4778 if (crtc->funcs->gamma_set == NULL) { 4779 ret = -ENOSYS; 4780 goto out; 4781 } 4782 4783 /* memcpy into gamma store */ 4784 if (crtc_lut->gamma_size != crtc->gamma_size) { 4785 ret = -EINVAL; 4786 goto out; 4787 } 4788 4789 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 4790 r_base = crtc->gamma_store; 4791 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 4792 ret = -EFAULT; 4793 goto out; 4794 } 4795 4796 g_base = (char *)r_base + size; 4797 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 4798 ret = -EFAULT; 4799 goto out; 4800 } 4801 4802 b_base = (char *)g_base + size; 4803 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 4804 ret = -EFAULT; 4805 goto out; 4806 } 4807 4808 crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); 4809 4810 out: 4811 drm_modeset_unlock_all(dev); 4812 return ret; 4813 4814 } 4815 4816 /** 4817 * drm_mode_gamma_get_ioctl - get the gamma table 4818 * @dev: DRM device 4819 * @data: ioctl data 4820 * @file_priv: DRM file info 4821 * 4822 * Copy the current gamma table into the storage provided. This also provides 4823 * the gamma table size the driver expects, which can be used to size the 4824 * allocated storage. 4825 * 4826 * Called by the user via ioctl. 4827 * 4828 * Returns: 4829 * Zero on success, negative errno on failure. 4830 */ 4831 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 4832 void *data, struct drm_file *file_priv) 4833 { 4834 struct drm_mode_crtc_lut *crtc_lut = data; 4835 struct drm_crtc *crtc; 4836 void *r_base, *g_base, *b_base; 4837 int size; 4838 int ret = 0; 4839 4840 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4841 return -EINVAL; 4842 4843 drm_modeset_lock_all(dev); 4844 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 4845 if (!crtc) { 4846 ret = -ENOENT; 4847 goto out; 4848 } 4849 4850 /* memcpy into gamma store */ 4851 if (crtc_lut->gamma_size != crtc->gamma_size) { 4852 ret = -EINVAL; 4853 goto out; 4854 } 4855 4856 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 4857 r_base = crtc->gamma_store; 4858 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 4859 ret = -EFAULT; 4860 goto out; 4861 } 4862 4863 g_base = (char *)r_base + size; 4864 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 4865 ret = -EFAULT; 4866 goto out; 4867 } 4868 4869 b_base = (char *)g_base + size; 4870 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 4871 ret = -EFAULT; 4872 goto out; 4873 } 4874 out: 4875 drm_modeset_unlock_all(dev); 4876 return ret; 4877 } 4878 4879 /* 4880 * The Linux version of kfree() is a macro and can't be called 4881 * directly via a function pointer 4882 */ 4883 static void drm_kms_free(void *arg) 4884 { 4885 kfree(arg); 4886 } 4887 4888 /** 4889 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 4890 * @dev: DRM device 4891 * @data: ioctl data 4892 * @file_priv: DRM file info 4893 * 4894 * This schedules an asynchronous update on a given CRTC, called page flip. 4895 * Optionally a drm event is generated to signal the completion of the event. 4896 * Generic drivers cannot assume that a pageflip with changed framebuffer 4897 * properties (including driver specific metadata like tiling layout) will work, 4898 * but some drivers support e.g. pixel format changes through the pageflip 4899 * ioctl. 4900 * 4901 * Called by the user via ioctl. 4902 * 4903 * Returns: 4904 * Zero on success, negative errno on failure. 4905 */ 4906 int drm_mode_page_flip_ioctl(struct drm_device *dev, 4907 void *data, struct drm_file *file_priv) 4908 { 4909 struct drm_mode_crtc_page_flip *page_flip = data; 4910 struct drm_crtc *crtc; 4911 struct drm_framebuffer *fb = NULL; 4912 struct drm_pending_vblank_event *e = NULL; 4913 int ret = -EINVAL; 4914 4915 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 4916 page_flip->reserved != 0) 4917 return -EINVAL; 4918 4919 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 4920 return -EINVAL; 4921 4922 crtc = drm_crtc_find(dev, page_flip->crtc_id); 4923 if (!crtc) 4924 return -ENOENT; 4925 4926 drm_modeset_lock_crtc(crtc, crtc->primary); 4927 if (crtc->primary->fb == NULL) { 4928 /* The framebuffer is currently unbound, presumably 4929 * due to a hotplug event, that userspace has not 4930 * yet discovered. 4931 */ 4932 ret = -EBUSY; 4933 goto out; 4934 } 4935 4936 if (crtc->funcs->page_flip == NULL) 4937 goto out; 4938 4939 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 4940 if (!fb) { 4941 ret = -ENOENT; 4942 goto out; 4943 } 4944 4945 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 4946 if (ret) 4947 goto out; 4948 4949 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 4950 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 4951 ret = -EINVAL; 4952 goto out; 4953 } 4954 4955 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 4956 ret = -ENOMEM; 4957 lockmgr(&dev->event_lock, LK_EXCLUSIVE); 4958 if (file_priv->event_space < sizeof(e->event)) { 4959 lockmgr(&dev->event_lock, LK_RELEASE); 4960 goto out; 4961 } 4962 file_priv->event_space -= sizeof(e->event); 4963 lockmgr(&dev->event_lock, LK_RELEASE); 4964 4965 e = kzalloc(sizeof(*e), GFP_KERNEL); 4966 if (e == NULL) { 4967 lockmgr(&dev->event_lock, LK_EXCLUSIVE); 4968 file_priv->event_space += sizeof(e->event); 4969 lockmgr(&dev->event_lock, LK_RELEASE); 4970 goto out; 4971 } 4972 4973 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 4974 e->event.base.length = sizeof(e->event); 4975 e->event.user_data = page_flip->user_data; 4976 e->base.event = &e->event.base; 4977 e->base.file_priv = file_priv; 4978 #ifdef __DragonFly__ 4979 e->base.destroy = 4980 (void (*) (struct drm_pending_event *)) drm_kms_free; 4981 #else 4982 e->base.destroy = 4983 (void (*) (struct drm_pending_event *)) kfree; 4984 #endif 4985 } 4986 4987 crtc->primary->old_fb = crtc->primary->fb; 4988 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 4989 if (ret) { 4990 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 4991 lockmgr(&dev->event_lock, LK_EXCLUSIVE); 4992 file_priv->event_space += sizeof(e->event); 4993 lockmgr(&dev->event_lock, LK_RELEASE); 4994 kfree(e); 4995 } 4996 /* Keep the old fb, don't unref it. */ 4997 crtc->primary->old_fb = NULL; 4998 } else { 4999 /* 5000 * Warn if the driver hasn't properly updated the crtc->fb 5001 * field to reflect that the new framebuffer is now used. 5002 * Failing to do so will screw with the reference counting 5003 * on framebuffers. 5004 */ 5005 WARN_ON(crtc->primary->fb != fb); 5006 /* Unref only the old framebuffer. */ 5007 fb = NULL; 5008 } 5009 5010 out: 5011 if (fb) 5012 drm_framebuffer_unreference(fb); 5013 if (crtc->primary->old_fb) 5014 drm_framebuffer_unreference(crtc->primary->old_fb); 5015 crtc->primary->old_fb = NULL; 5016 drm_modeset_unlock_crtc(crtc); 5017 5018 return ret; 5019 } 5020 5021 /** 5022 * drm_mode_config_reset - call ->reset callbacks 5023 * @dev: drm device 5024 * 5025 * This functions calls all the crtc's, encoder's and connector's ->reset 5026 * callback. Drivers can use this in e.g. their driver load or resume code to 5027 * reset hardware and software state. 5028 */ 5029 void drm_mode_config_reset(struct drm_device *dev) 5030 { 5031 struct drm_crtc *crtc; 5032 struct drm_plane *plane; 5033 struct drm_encoder *encoder; 5034 struct drm_connector *connector; 5035 5036 list_for_each_entry(plane, &dev->mode_config.plane_list, head) 5037 if (plane->funcs->reset) 5038 plane->funcs->reset(plane); 5039 5040 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) 5041 if (crtc->funcs->reset) 5042 crtc->funcs->reset(crtc); 5043 5044 list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) 5045 if (encoder->funcs->reset) 5046 encoder->funcs->reset(encoder); 5047 5048 list_for_each_entry(connector, &dev->mode_config.connector_list, head) { 5049 connector->status = connector_status_unknown; 5050 5051 if (connector->funcs->reset) 5052 connector->funcs->reset(connector); 5053 } 5054 } 5055 EXPORT_SYMBOL(drm_mode_config_reset); 5056 5057 /** 5058 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 5059 * @dev: DRM device 5060 * @data: ioctl data 5061 * @file_priv: DRM file info 5062 * 5063 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 5064 * TTM or something else entirely) and returns the resulting buffer handle. This 5065 * handle can then be wrapped up into a framebuffer modeset object. 5066 * 5067 * Note that userspace is not allowed to use such objects for render 5068 * acceleration - drivers must create their own private ioctls for such a use 5069 * case. 5070 * 5071 * Called by the user via ioctl. 5072 * 5073 * Returns: 5074 * Zero on success, negative errno on failure. 5075 */ 5076 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 5077 void *data, struct drm_file *file_priv) 5078 { 5079 struct drm_mode_create_dumb *args = data; 5080 u32 cpp, stride, size; 5081 5082 if (!dev->driver->dumb_create) 5083 return -ENOSYS; 5084 if (!args->width || !args->height || !args->bpp) 5085 return -EINVAL; 5086 5087 /* overflow checks for 32bit size calculations */ 5088 /* NOTE: DIV_ROUND_UP() can overflow */ 5089 cpp = DIV_ROUND_UP(args->bpp, 8); 5090 if (!cpp || cpp > 0xffffffffU / args->width) 5091 return -EINVAL; 5092 stride = cpp * args->width; 5093 if (args->height > 0xffffffffU / stride) 5094 return -EINVAL; 5095 5096 /* test for wrap-around */ 5097 size = args->height * stride; 5098 if (PAGE_ALIGN(size) == 0) 5099 return -EINVAL; 5100 5101 /* 5102 * handle, pitch and size are output parameters. Zero them out to 5103 * prevent drivers from accidentally using uninitialized data. Since 5104 * not all existing userspace is clearing these fields properly we 5105 * cannot reject IOCTL with garbage in them. 5106 */ 5107 args->handle = 0; 5108 args->pitch = 0; 5109 args->size = 0; 5110 5111 return dev->driver->dumb_create(file_priv, dev, args); 5112 } 5113 5114 /** 5115 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 5116 * @dev: DRM device 5117 * @data: ioctl data 5118 * @file_priv: DRM file info 5119 * 5120 * Allocate an offset in the drm device node's address space to be able to 5121 * memory map a dumb buffer. 5122 * 5123 * Called by the user via ioctl. 5124 * 5125 * Returns: 5126 * Zero on success, negative errno on failure. 5127 */ 5128 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 5129 void *data, struct drm_file *file_priv) 5130 { 5131 struct drm_mode_map_dumb *args = data; 5132 5133 /* call driver ioctl to get mmap offset */ 5134 if (!dev->driver->dumb_map_offset) 5135 return -ENOSYS; 5136 5137 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 5138 } 5139 5140 /** 5141 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 5142 * @dev: DRM device 5143 * @data: ioctl data 5144 * @file_priv: DRM file info 5145 * 5146 * This destroys the userspace handle for the given dumb backing storage buffer. 5147 * Since buffer objects must be reference counted in the kernel a buffer object 5148 * won't be immediately freed if a framebuffer modeset object still uses it. 5149 * 5150 * Called by the user via ioctl. 5151 * 5152 * Returns: 5153 * Zero on success, negative errno on failure. 5154 */ 5155 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 5156 void *data, struct drm_file *file_priv) 5157 { 5158 struct drm_mode_destroy_dumb *args = data; 5159 5160 if (!dev->driver->dumb_destroy) 5161 return -ENOSYS; 5162 5163 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 5164 } 5165 5166 /** 5167 * drm_fb_get_bpp_depth - get the bpp/depth values for format 5168 * @format: pixel format (DRM_FORMAT_*) 5169 * @depth: storage for the depth value 5170 * @bpp: storage for the bpp value 5171 * 5172 * This only supports RGB formats here for compat with code that doesn't use 5173 * pixel formats directly yet. 5174 */ 5175 void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, 5176 int *bpp) 5177 { 5178 switch (format) { 5179 case DRM_FORMAT_C8: 5180 case DRM_FORMAT_RGB332: 5181 case DRM_FORMAT_BGR233: 5182 *depth = 8; 5183 *bpp = 8; 5184 break; 5185 case DRM_FORMAT_XRGB1555: 5186 case DRM_FORMAT_XBGR1555: 5187 case DRM_FORMAT_RGBX5551: 5188 case DRM_FORMAT_BGRX5551: 5189 case DRM_FORMAT_ARGB1555: 5190 case DRM_FORMAT_ABGR1555: 5191 case DRM_FORMAT_RGBA5551: 5192 case DRM_FORMAT_BGRA5551: 5193 *depth = 15; 5194 *bpp = 16; 5195 break; 5196 case DRM_FORMAT_RGB565: 5197 case DRM_FORMAT_BGR565: 5198 *depth = 16; 5199 *bpp = 16; 5200 break; 5201 case DRM_FORMAT_RGB888: 5202 case DRM_FORMAT_BGR888: 5203 *depth = 24; 5204 *bpp = 24; 5205 break; 5206 case DRM_FORMAT_XRGB8888: 5207 case DRM_FORMAT_XBGR8888: 5208 case DRM_FORMAT_RGBX8888: 5209 case DRM_FORMAT_BGRX8888: 5210 *depth = 24; 5211 *bpp = 32; 5212 break; 5213 case DRM_FORMAT_XRGB2101010: 5214 case DRM_FORMAT_XBGR2101010: 5215 case DRM_FORMAT_RGBX1010102: 5216 case DRM_FORMAT_BGRX1010102: 5217 case DRM_FORMAT_ARGB2101010: 5218 case DRM_FORMAT_ABGR2101010: 5219 case DRM_FORMAT_RGBA1010102: 5220 case DRM_FORMAT_BGRA1010102: 5221 *depth = 30; 5222 *bpp = 32; 5223 break; 5224 case DRM_FORMAT_ARGB8888: 5225 case DRM_FORMAT_ABGR8888: 5226 case DRM_FORMAT_RGBA8888: 5227 case DRM_FORMAT_BGRA8888: 5228 *depth = 32; 5229 *bpp = 32; 5230 break; 5231 default: 5232 DRM_DEBUG_KMS("unsupported pixel format %s\n", 5233 drm_get_format_name(format)); 5234 *depth = 0; 5235 *bpp = 0; 5236 break; 5237 } 5238 } 5239 EXPORT_SYMBOL(drm_fb_get_bpp_depth); 5240 5241 /** 5242 * drm_format_num_planes - get the number of planes for format 5243 * @format: pixel format (DRM_FORMAT_*) 5244 * 5245 * Returns: 5246 * The number of planes used by the specified pixel format. 5247 */ 5248 int drm_format_num_planes(uint32_t format) 5249 { 5250 switch (format) { 5251 case DRM_FORMAT_YUV410: 5252 case DRM_FORMAT_YVU410: 5253 case DRM_FORMAT_YUV411: 5254 case DRM_FORMAT_YVU411: 5255 case DRM_FORMAT_YUV420: 5256 case DRM_FORMAT_YVU420: 5257 case DRM_FORMAT_YUV422: 5258 case DRM_FORMAT_YVU422: 5259 case DRM_FORMAT_YUV444: 5260 case DRM_FORMAT_YVU444: 5261 return 3; 5262 case DRM_FORMAT_NV12: 5263 case DRM_FORMAT_NV21: 5264 case DRM_FORMAT_NV16: 5265 case DRM_FORMAT_NV61: 5266 case DRM_FORMAT_NV24: 5267 case DRM_FORMAT_NV42: 5268 return 2; 5269 default: 5270 return 1; 5271 } 5272 } 5273 EXPORT_SYMBOL(drm_format_num_planes); 5274 5275 /** 5276 * drm_format_plane_cpp - determine the bytes per pixel value 5277 * @format: pixel format (DRM_FORMAT_*) 5278 * @plane: plane index 5279 * 5280 * Returns: 5281 * The bytes per pixel value for the specified plane. 5282 */ 5283 int drm_format_plane_cpp(uint32_t format, int plane) 5284 { 5285 unsigned int depth; 5286 int bpp; 5287 5288 if (plane >= drm_format_num_planes(format)) 5289 return 0; 5290 5291 switch (format) { 5292 case DRM_FORMAT_YUYV: 5293 case DRM_FORMAT_YVYU: 5294 case DRM_FORMAT_UYVY: 5295 case DRM_FORMAT_VYUY: 5296 return 2; 5297 case DRM_FORMAT_NV12: 5298 case DRM_FORMAT_NV21: 5299 case DRM_FORMAT_NV16: 5300 case DRM_FORMAT_NV61: 5301 case DRM_FORMAT_NV24: 5302 case DRM_FORMAT_NV42: 5303 return plane ? 2 : 1; 5304 case DRM_FORMAT_YUV410: 5305 case DRM_FORMAT_YVU410: 5306 case DRM_FORMAT_YUV411: 5307 case DRM_FORMAT_YVU411: 5308 case DRM_FORMAT_YUV420: 5309 case DRM_FORMAT_YVU420: 5310 case DRM_FORMAT_YUV422: 5311 case DRM_FORMAT_YVU422: 5312 case DRM_FORMAT_YUV444: 5313 case DRM_FORMAT_YVU444: 5314 return 1; 5315 default: 5316 drm_fb_get_bpp_depth(format, &depth, &bpp); 5317 return bpp >> 3; 5318 } 5319 } 5320 EXPORT_SYMBOL(drm_format_plane_cpp); 5321 5322 /** 5323 * drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor 5324 * @format: pixel format (DRM_FORMAT_*) 5325 * 5326 * Returns: 5327 * The horizontal chroma subsampling factor for the 5328 * specified pixel format. 5329 */ 5330 int drm_format_horz_chroma_subsampling(uint32_t format) 5331 { 5332 switch (format) { 5333 case DRM_FORMAT_YUV411: 5334 case DRM_FORMAT_YVU411: 5335 case DRM_FORMAT_YUV410: 5336 case DRM_FORMAT_YVU410: 5337 return 4; 5338 case DRM_FORMAT_YUYV: 5339 case DRM_FORMAT_YVYU: 5340 case DRM_FORMAT_UYVY: 5341 case DRM_FORMAT_VYUY: 5342 case DRM_FORMAT_NV12: 5343 case DRM_FORMAT_NV21: 5344 case DRM_FORMAT_NV16: 5345 case DRM_FORMAT_NV61: 5346 case DRM_FORMAT_YUV422: 5347 case DRM_FORMAT_YVU422: 5348 case DRM_FORMAT_YUV420: 5349 case DRM_FORMAT_YVU420: 5350 return 2; 5351 default: 5352 return 1; 5353 } 5354 } 5355 EXPORT_SYMBOL(drm_format_horz_chroma_subsampling); 5356 5357 /** 5358 * drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor 5359 * @format: pixel format (DRM_FORMAT_*) 5360 * 5361 * Returns: 5362 * The vertical chroma subsampling factor for the 5363 * specified pixel format. 5364 */ 5365 int drm_format_vert_chroma_subsampling(uint32_t format) 5366 { 5367 switch (format) { 5368 case DRM_FORMAT_YUV410: 5369 case DRM_FORMAT_YVU410: 5370 return 4; 5371 case DRM_FORMAT_YUV420: 5372 case DRM_FORMAT_YVU420: 5373 case DRM_FORMAT_NV12: 5374 case DRM_FORMAT_NV21: 5375 return 2; 5376 default: 5377 return 1; 5378 } 5379 } 5380 EXPORT_SYMBOL(drm_format_vert_chroma_subsampling); 5381 5382 /** 5383 * drm_rotation_simplify() - Try to simplify the rotation 5384 * @rotation: Rotation to be simplified 5385 * @supported_rotations: Supported rotations 5386 * 5387 * Attempt to simplify the rotation to a form that is supported. 5388 * Eg. if the hardware supports everything except DRM_REFLECT_X 5389 * one could call this function like this: 5390 * 5391 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5392 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5393 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5394 * 5395 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5396 * transforms the hardware supports, this function may not 5397 * be able to produce a supported transform, so the caller should 5398 * check the result afterwards. 5399 */ 5400 unsigned int drm_rotation_simplify(unsigned int rotation, 5401 unsigned int supported_rotations) 5402 { 5403 if (rotation & ~supported_rotations) { 5404 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5405 rotation = (rotation & ~0xf) | BIT((ffs(rotation & 0xf) + 1) % 4); 5406 } 5407 5408 return rotation; 5409 } 5410 EXPORT_SYMBOL(drm_rotation_simplify); 5411 5412 /** 5413 * drm_mode_config_init - initialize DRM mode_configuration structure 5414 * @dev: DRM device 5415 * 5416 * Initialize @dev's mode_config structure, used for tracking the graphics 5417 * configuration of @dev. 5418 * 5419 * Since this initializes the modeset locks, no locking is possible. Which is no 5420 * problem, since this should happen single threaded at init time. It is the 5421 * driver's problem to ensure this guarantee. 5422 * 5423 */ 5424 void drm_mode_config_init(struct drm_device *dev) 5425 { 5426 lockinit(&dev->mode_config.mutex, "drmmcm", 0, LK_CANRECURSE); 5427 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5428 lockinit(&dev->mode_config.idr_mutex, "mcfgidr", 0, LK_CANRECURSE); 5429 lockinit(&dev->mode_config.fb_lock, "drmfbl", 0, LK_CANRECURSE); 5430 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5431 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5432 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5433 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5434 INIT_LIST_HEAD(&dev->mode_config.property_list); 5435 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5436 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5437 idr_init(&dev->mode_config.crtc_idr); 5438 idr_init(&dev->mode_config.tile_idr); 5439 5440 drm_modeset_lock_all(dev); 5441 drm_mode_create_standard_properties(dev); 5442 drm_modeset_unlock_all(dev); 5443 5444 /* Just to be sure */ 5445 dev->mode_config.num_fb = 0; 5446 dev->mode_config.num_connector = 0; 5447 dev->mode_config.num_crtc = 0; 5448 dev->mode_config.num_encoder = 0; 5449 dev->mode_config.num_overlay_plane = 0; 5450 dev->mode_config.num_total_plane = 0; 5451 } 5452 EXPORT_SYMBOL(drm_mode_config_init); 5453 5454 /** 5455 * drm_mode_config_cleanup - free up DRM mode_config info 5456 * @dev: DRM device 5457 * 5458 * Free up all the connectors and CRTCs associated with this DRM device, then 5459 * free up the framebuffers and associated buffer objects. 5460 * 5461 * Note that since this /should/ happen single-threaded at driver/device 5462 * teardown time, no locking is required. It's the driver's job to ensure that 5463 * this guarantee actually holds true. 5464 * 5465 * FIXME: cleanup any dangling user buffer objects too 5466 */ 5467 void drm_mode_config_cleanup(struct drm_device *dev) 5468 { 5469 struct drm_connector *connector, *ot; 5470 struct drm_crtc *crtc, *ct; 5471 struct drm_encoder *encoder, *enct; 5472 struct drm_framebuffer *fb, *fbt; 5473 struct drm_property *property, *pt; 5474 struct drm_property_blob *blob, *bt; 5475 struct drm_plane *plane, *plt; 5476 5477 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5478 head) { 5479 encoder->funcs->destroy(encoder); 5480 } 5481 5482 list_for_each_entry_safe(connector, ot, 5483 &dev->mode_config.connector_list, head) { 5484 connector->funcs->destroy(connector); 5485 } 5486 5487 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5488 head) { 5489 drm_property_destroy(dev, property); 5490 } 5491 5492 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5493 head) { 5494 drm_property_destroy_blob(dev, blob); 5495 } 5496 5497 /* 5498 * Single-threaded teardown context, so it's not required to grab the 5499 * fb_lock to protect against concurrent fb_list access. Contrary, it 5500 * would actually deadlock with the drm_framebuffer_cleanup function. 5501 * 5502 * Also, if there are any framebuffers left, that's a driver leak now, 5503 * so politely WARN about this. 5504 */ 5505 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5506 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5507 drm_framebuffer_remove(fb); 5508 } 5509 5510 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5511 head) { 5512 plane->funcs->destroy(plane); 5513 } 5514 5515 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5516 crtc->funcs->destroy(crtc); 5517 } 5518 5519 idr_destroy(&dev->mode_config.tile_idr); 5520 idr_destroy(&dev->mode_config.crtc_idr); 5521 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5522 } 5523 EXPORT_SYMBOL(drm_mode_config_cleanup); 5524 5525 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5526 unsigned int supported_rotations) 5527 { 5528 static const struct drm_prop_enum_list props[] = { 5529 { DRM_ROTATE_0, "rotate-0" }, 5530 { DRM_ROTATE_90, "rotate-90" }, 5531 { DRM_ROTATE_180, "rotate-180" }, 5532 { DRM_ROTATE_270, "rotate-270" }, 5533 { DRM_REFLECT_X, "reflect-x" }, 5534 { DRM_REFLECT_Y, "reflect-y" }, 5535 }; 5536 5537 return drm_property_create_bitmask(dev, 0, "rotation", 5538 props, ARRAY_SIZE(props), 5539 supported_rotations); 5540 } 5541 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5542 5543 /** 5544 * DOC: Tile group 5545 * 5546 * Tile groups are used to represent tiled monitors with a unique 5547 * integer identifier. Tiled monitors using DisplayID v1.3 have 5548 * a unique 8-byte handle, we store this in a tile group, so we 5549 * have a common identifier for all tiles in a monitor group. 5550 */ 5551 static void drm_tile_group_free(struct kref *kref) 5552 { 5553 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5554 struct drm_device *dev = tg->dev; 5555 mutex_lock(&dev->mode_config.idr_mutex); 5556 idr_remove(&dev->mode_config.tile_idr, tg->id); 5557 mutex_unlock(&dev->mode_config.idr_mutex); 5558 kfree(tg); 5559 } 5560 5561 /** 5562 * drm_mode_put_tile_group - drop a reference to a tile group. 5563 * @dev: DRM device 5564 * @tg: tile group to drop reference to. 5565 * 5566 * drop reference to tile group and free if 0. 5567 */ 5568 void drm_mode_put_tile_group(struct drm_device *dev, 5569 struct drm_tile_group *tg) 5570 { 5571 kref_put(&tg->refcount, drm_tile_group_free); 5572 } 5573 5574 /** 5575 * drm_mode_get_tile_group - get a reference to an existing tile group 5576 * @dev: DRM device 5577 * @topology: 8-bytes unique per monitor. 5578 * 5579 * Use the unique bytes to get a reference to an existing tile group. 5580 * 5581 * RETURNS: 5582 * tile group or NULL if not found. 5583 */ 5584 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 5585 char topology[8]) 5586 { 5587 #if 0 5588 struct drm_tile_group *tg; 5589 int id; 5590 mutex_lock(&dev->mode_config.idr_mutex); 5591 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 5592 if (!memcmp(tg->group_data, topology, 8)) { 5593 if (!kref_get_unless_zero(&tg->refcount)) 5594 tg = NULL; 5595 mutex_unlock(&dev->mode_config.idr_mutex); 5596 return tg; 5597 } 5598 } 5599 mutex_unlock(&dev->mode_config.idr_mutex); 5600 #endif 5601 return NULL; 5602 } 5603 EXPORT_SYMBOL(drm_mode_get_tile_group); 5604 5605 /** 5606 * drm_mode_create_tile_group - create a tile group from a displayid description 5607 * @dev: DRM device 5608 * @topology: 8-bytes unique per monitor. 5609 * 5610 * Create a tile group for the unique monitor, and get a unique 5611 * identifier for the tile group. 5612 * 5613 * RETURNS: 5614 * new tile group or error. 5615 */ 5616 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 5617 char topology[8]) 5618 { 5619 struct drm_tile_group *tg; 5620 int ret; 5621 5622 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 5623 if (!tg) 5624 return ERR_PTR(-ENOMEM); 5625 5626 kref_init(&tg->refcount); 5627 memcpy(tg->group_data, topology, 8); 5628 tg->dev = dev; 5629 5630 mutex_lock(&dev->mode_config.idr_mutex); 5631 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 5632 if (ret >= 0) { 5633 tg->id = ret; 5634 } else { 5635 kfree(tg); 5636 tg = ERR_PTR(ret); 5637 } 5638 5639 mutex_unlock(&dev->mode_config.idr_mutex); 5640 return tg; 5641 } 5642 EXPORT_SYMBOL(drm_mode_create_tile_group); 5643