1 /* 2 * Copyright (c) 2006-2008 Intel Corporation 3 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> 4 * Copyright (c) 2008 Red Hat Inc. 5 * 6 * DRM core CRTC related functions 7 * 8 * Permission to use, copy, modify, distribute, and sell this software and its 9 * documentation for any purpose is hereby granted without fee, provided that 10 * the above copyright notice appear in all copies and that both that copyright 11 * notice and this permission notice appear in supporting documentation, and 12 * that the name of the copyright holders not be used in advertising or 13 * publicity pertaining to distribution of the software without specific, 14 * written prior permission. The copyright holders make no representations 15 * about the suitability of this software for any purpose. It is provided "as 16 * is" without express or implied warranty. 17 * 18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 24 * OF THIS SOFTWARE. 25 * 26 * Authors: 27 * Keith Packard 28 * Eric Anholt <eric@anholt.net> 29 * Dave Airlie <airlied@linux.ie> 30 * Jesse Barnes <jesse.barnes@intel.com> 31 */ 32 #include <linux/ctype.h> 33 #include <linux/list.h> 34 #include <linux/slab.h> 35 #include <linux/export.h> 36 #include <drm/drmP.h> 37 #include <drm/drm_crtc.h> 38 #include <drm/drm_edid.h> 39 #include <drm/drm_fourcc.h> 40 #include <drm/drm_modeset_lock.h> 41 #include <drm/drm_atomic.h> 42 #include <drm/drm_auth.h> 43 44 #include "drm_crtc_internal.h" 45 #include "drm_internal.h" 46 47 static struct drm_framebuffer * 48 internal_framebuffer_create(struct drm_device *dev, 49 const struct drm_mode_fb_cmd2 *r, 50 struct drm_file *file_priv); 51 52 /* Avoid boilerplate. I'm tired of typing. */ 53 #define DRM_ENUM_NAME_FN(fnname, list) \ 54 const char *fnname(int val) \ 55 { \ 56 int i; \ 57 for (i = 0; i < ARRAY_SIZE(list); i++) { \ 58 if (list[i].type == val) \ 59 return list[i].name; \ 60 } \ 61 return "(unknown)"; \ 62 } 63 64 /* 65 * Global properties 66 */ 67 static const struct drm_prop_enum_list drm_dpms_enum_list[] = { 68 { DRM_MODE_DPMS_ON, "On" }, 69 { DRM_MODE_DPMS_STANDBY, "Standby" }, 70 { DRM_MODE_DPMS_SUSPEND, "Suspend" }, 71 { DRM_MODE_DPMS_OFF, "Off" } 72 }; 73 74 DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list) 75 76 static const struct drm_prop_enum_list drm_plane_type_enum_list[] = { 77 { DRM_PLANE_TYPE_OVERLAY, "Overlay" }, 78 { DRM_PLANE_TYPE_PRIMARY, "Primary" }, 79 { DRM_PLANE_TYPE_CURSOR, "Cursor" }, 80 }; 81 82 /* 83 * Optional properties 84 */ 85 static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = { 86 { DRM_MODE_SCALE_NONE, "None" }, 87 { DRM_MODE_SCALE_FULLSCREEN, "Full" }, 88 { DRM_MODE_SCALE_CENTER, "Center" }, 89 { DRM_MODE_SCALE_ASPECT, "Full aspect" }, 90 }; 91 92 static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { 93 { DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" }, 94 { DRM_MODE_PICTURE_ASPECT_4_3, "4:3" }, 95 { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, 96 }; 97 98 /* 99 * Non-global properties, but "required" for certain connectors. 100 */ 101 static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = { 102 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 103 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 104 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 105 }; 106 107 DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list) 108 109 static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = { 110 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 111 { DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */ 112 { DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */ 113 }; 114 115 DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name, 116 drm_dvi_i_subconnector_enum_list) 117 118 static const struct drm_prop_enum_list drm_tv_select_enum_list[] = { 119 { DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */ 120 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 121 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 122 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 123 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 124 }; 125 126 DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list) 127 128 static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { 129 { DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */ 130 { DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */ 131 { DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */ 132 { DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */ 133 { DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */ 134 }; 135 136 DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, 137 drm_tv_subconnector_enum_list) 138 139 static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = { 140 { DRM_MODE_DIRTY_OFF, "Off" }, 141 { DRM_MODE_DIRTY_ON, "On" }, 142 { DRM_MODE_DIRTY_ANNOTATE, "Annotate" }, 143 }; 144 145 struct drm_conn_prop_enum_list { 146 int type; 147 const char *name; 148 struct ida ida; 149 }; 150 151 /* 152 * Connector and encoder types. 153 */ 154 static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { 155 { DRM_MODE_CONNECTOR_Unknown, "Unknown" }, 156 { DRM_MODE_CONNECTOR_VGA, "VGA" }, 157 { DRM_MODE_CONNECTOR_DVII, "DVI-I" }, 158 { DRM_MODE_CONNECTOR_DVID, "DVI-D" }, 159 { DRM_MODE_CONNECTOR_DVIA, "DVI-A" }, 160 { DRM_MODE_CONNECTOR_Composite, "Composite" }, 161 { DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" }, 162 { DRM_MODE_CONNECTOR_LVDS, "LVDS" }, 163 { DRM_MODE_CONNECTOR_Component, "Component" }, 164 { DRM_MODE_CONNECTOR_9PinDIN, "DIN" }, 165 { DRM_MODE_CONNECTOR_DisplayPort, "DP" }, 166 { DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" }, 167 { DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" }, 168 { DRM_MODE_CONNECTOR_TV, "TV" }, 169 { DRM_MODE_CONNECTOR_eDP, "eDP" }, 170 { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, 171 { DRM_MODE_CONNECTOR_DSI, "DSI" }, 172 { DRM_MODE_CONNECTOR_DPI, "DPI" }, 173 }; 174 175 static const struct drm_prop_enum_list drm_encoder_enum_list[] = { 176 { DRM_MODE_ENCODER_NONE, "None" }, 177 { DRM_MODE_ENCODER_DAC, "DAC" }, 178 { DRM_MODE_ENCODER_TMDS, "TMDS" }, 179 { DRM_MODE_ENCODER_LVDS, "LVDS" }, 180 { DRM_MODE_ENCODER_TVDAC, "TV" }, 181 { DRM_MODE_ENCODER_VIRTUAL, "Virtual" }, 182 { DRM_MODE_ENCODER_DSI, "DSI" }, 183 { DRM_MODE_ENCODER_DPMST, "DP MST" }, 184 { DRM_MODE_ENCODER_DPI, "DPI" }, 185 }; 186 187 static const struct drm_prop_enum_list drm_subpixel_enum_list[] = { 188 { SubPixelUnknown, "Unknown" }, 189 { SubPixelHorizontalRGB, "Horizontal RGB" }, 190 { SubPixelHorizontalBGR, "Horizontal BGR" }, 191 { SubPixelVerticalRGB, "Vertical RGB" }, 192 { SubPixelVerticalBGR, "Vertical BGR" }, 193 { SubPixelNone, "None" }, 194 }; 195 196 void drm_connector_ida_init(void) 197 { 198 int i; 199 200 for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++) 201 ida_init(&drm_connector_enum_list[i].ida); 202 } 203 204 void drm_connector_ida_destroy(void) 205 { 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 } 211 212 /** 213 * drm_get_connector_status_name - return a string for connector status 214 * @status: connector status to compute name of 215 * 216 * In contrast to the other drm_get_*_name functions this one here returns a 217 * const pointer and hence is threadsafe. 218 */ 219 const char *drm_get_connector_status_name(enum drm_connector_status status) 220 { 221 if (status == connector_status_connected) 222 return "connected"; 223 else if (status == connector_status_disconnected) 224 return "disconnected"; 225 else 226 return "unknown"; 227 } 228 EXPORT_SYMBOL(drm_get_connector_status_name); 229 230 /** 231 * drm_get_subpixel_order_name - return a string for a given subpixel enum 232 * @order: enum of subpixel_order 233 * 234 * Note you could abuse this and return something out of bounds, but that 235 * would be a caller error. No unscrubbed user data should make it here. 236 */ 237 const char *drm_get_subpixel_order_name(enum subpixel_order order) 238 { 239 return drm_subpixel_enum_list[order].name; 240 } 241 EXPORT_SYMBOL(drm_get_subpixel_order_name); 242 243 /* 244 * Internal function to assign a slot in the object idr and optionally 245 * register the object into the idr. 246 */ 247 static int drm_mode_object_get_reg(struct drm_device *dev, 248 struct drm_mode_object *obj, 249 uint32_t obj_type, 250 bool register_obj, 251 void (*obj_free_cb)(struct kref *kref)) 252 { 253 int ret; 254 255 mutex_lock(&dev->mode_config.idr_mutex); 256 ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL); 257 if (ret >= 0) { 258 /* 259 * Set up the object linking under the protection of the idr 260 * lock so that other users can't see inconsistent state. 261 */ 262 obj->id = ret; 263 obj->type = obj_type; 264 if (obj_free_cb) { 265 obj->free_cb = obj_free_cb; 266 kref_init(&obj->refcount); 267 } 268 } 269 mutex_unlock(&dev->mode_config.idr_mutex); 270 271 return ret < 0 ? ret : 0; 272 } 273 274 /** 275 * drm_mode_object_get - allocate a new modeset identifier 276 * @dev: DRM device 277 * @obj: object pointer, used to generate unique ID 278 * @obj_type: object type 279 * 280 * Create a unique identifier based on @ptr in @dev's identifier space. Used 281 * for tracking modes, CRTCs and connectors. Note that despite the _get postfix 282 * modeset identifiers are _not_ reference counted. Hence don't use this for 283 * reference counted modeset objects like framebuffers. 284 * 285 * Returns: 286 * Zero on success, error code on failure. 287 */ 288 int drm_mode_object_get(struct drm_device *dev, 289 struct drm_mode_object *obj, uint32_t obj_type) 290 { 291 return drm_mode_object_get_reg(dev, obj, obj_type, true, NULL); 292 } 293 294 static void drm_mode_object_register(struct drm_device *dev, 295 struct drm_mode_object *obj) 296 { 297 mutex_lock(&dev->mode_config.idr_mutex); 298 idr_replace(&dev->mode_config.crtc_idr, obj, obj->id); 299 mutex_unlock(&dev->mode_config.idr_mutex); 300 } 301 302 /** 303 * drm_mode_object_unregister - free a modeset identifer 304 * @dev: DRM device 305 * @object: object to free 306 * 307 * Free @id from @dev's unique identifier pool. 308 * This function can be called multiple times, and guards against 309 * multiple removals. 310 * These modeset identifiers are _not_ reference counted. Hence don't use this 311 * for reference counted modeset objects like framebuffers. 312 */ 313 void drm_mode_object_unregister(struct drm_device *dev, 314 struct drm_mode_object *object) 315 { 316 mutex_lock(&dev->mode_config.idr_mutex); 317 if (object->id) { 318 idr_remove(&dev->mode_config.crtc_idr, object->id); 319 object->id = 0; 320 } 321 mutex_unlock(&dev->mode_config.idr_mutex); 322 } 323 324 static struct drm_mode_object *_object_find(struct drm_device *dev, 325 uint32_t id, uint32_t type) 326 { 327 struct drm_mode_object *obj = NULL; 328 329 mutex_lock(&dev->mode_config.idr_mutex); 330 obj = idr_find(&dev->mode_config.crtc_idr, id); 331 if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type) 332 obj = NULL; 333 if (obj && obj->id != id) 334 obj = NULL; 335 336 if (obj && obj->free_cb) { 337 if (!kref_get_unless_zero(&obj->refcount)) 338 obj = NULL; 339 } 340 mutex_unlock(&dev->mode_config.idr_mutex); 341 342 return obj; 343 } 344 345 /** 346 * drm_mode_object_find - look up a drm object with static lifetime 347 * @dev: drm device 348 * @id: id of the mode object 349 * @type: type of the mode object 350 * 351 * This function is used to look up a modeset object. It will acquire a 352 * reference for reference counted objects. This reference must be dropped again 353 * by callind drm_mode_object_unreference(). 354 */ 355 struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, 356 uint32_t id, uint32_t type) 357 { 358 struct drm_mode_object *obj = NULL; 359 360 obj = _object_find(dev, id, type); 361 return obj; 362 } 363 EXPORT_SYMBOL(drm_mode_object_find); 364 365 /** 366 * drm_mode_object_unreference - decr the object refcnt 367 * @obj: mode_object 368 * 369 * This functions decrements the object's refcount if it is a refcounted modeset 370 * object. It is a no-op on any other object. This is used to drop references 371 * acquired with drm_mode_object_reference(). 372 */ 373 void drm_mode_object_unreference(struct drm_mode_object *obj) 374 { 375 if (obj->free_cb) { 376 DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, atomic_read(&obj->refcount.refcount)); 377 kref_put(&obj->refcount, obj->free_cb); 378 } 379 } 380 EXPORT_SYMBOL(drm_mode_object_unreference); 381 382 /** 383 * drm_mode_object_reference - incr the object refcnt 384 * @obj: mode_object 385 * 386 * This functions increments the object's refcount if it is a refcounted modeset 387 * object. It is a no-op on any other object. References should be dropped again 388 * by calling drm_mode_object_unreference(). 389 */ 390 void drm_mode_object_reference(struct drm_mode_object *obj) 391 { 392 if (obj->free_cb) { 393 DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, atomic_read(&obj->refcount.refcount)); 394 kref_get(&obj->refcount); 395 } 396 } 397 EXPORT_SYMBOL(drm_mode_object_reference); 398 399 /** 400 * drm_crtc_force_disable - Forcibly turn off a CRTC 401 * @crtc: CRTC to turn off 402 * 403 * Returns: 404 * Zero on success, error code on failure. 405 */ 406 int drm_crtc_force_disable(struct drm_crtc *crtc) 407 { 408 struct drm_mode_set set = { 409 .crtc = crtc, 410 }; 411 412 return drm_mode_set_config_internal(&set); 413 } 414 EXPORT_SYMBOL(drm_crtc_force_disable); 415 416 /** 417 * drm_crtc_force_disable_all - Forcibly turn off all enabled CRTCs 418 * @dev: DRM device whose CRTCs to turn off 419 * 420 * Drivers may want to call this on unload to ensure that all displays are 421 * unlit and the GPU is in a consistent, low power state. Takes modeset locks. 422 * 423 * Returns: 424 * Zero on success, error code on failure. 425 */ 426 int drm_crtc_force_disable_all(struct drm_device *dev) 427 { 428 struct drm_crtc *crtc; 429 int ret = 0; 430 431 drm_modeset_lock_all(dev); 432 drm_for_each_crtc(crtc, dev) 433 if (crtc->enabled) { 434 ret = drm_crtc_force_disable(crtc); 435 if (ret) 436 goto out; 437 } 438 out: 439 drm_modeset_unlock_all(dev); 440 return ret; 441 } 442 EXPORT_SYMBOL(drm_crtc_force_disable_all); 443 444 static void drm_framebuffer_free(struct kref *kref) 445 { 446 struct drm_framebuffer *fb = 447 container_of(kref, struct drm_framebuffer, base.refcount); 448 struct drm_device *dev = fb->dev; 449 450 /* 451 * The lookup idr holds a weak reference, which has not necessarily been 452 * removed at this point. Check for that. 453 */ 454 drm_mode_object_unregister(dev, &fb->base); 455 456 fb->funcs->destroy(fb); 457 } 458 459 /** 460 * drm_framebuffer_init - initialize a framebuffer 461 * @dev: DRM device 462 * @fb: framebuffer to be initialized 463 * @funcs: ... with these functions 464 * 465 * Allocates an ID for the framebuffer's parent mode object, sets its mode 466 * functions & device file and adds it to the master fd list. 467 * 468 * IMPORTANT: 469 * This functions publishes the fb and makes it available for concurrent access 470 * by other users. Which means by this point the fb _must_ be fully set up - 471 * since all the fb attributes are invariant over its lifetime, no further 472 * locking but only correct reference counting is required. 473 * 474 * Returns: 475 * Zero on success, error code on failure. 476 */ 477 int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb, 478 const struct drm_framebuffer_funcs *funcs) 479 { 480 int ret; 481 482 INIT_LIST_HEAD(&fb->filp_head); 483 fb->dev = dev; 484 fb->funcs = funcs; 485 486 ret = drm_mode_object_get_reg(dev, &fb->base, DRM_MODE_OBJECT_FB, 487 false, drm_framebuffer_free); 488 if (ret) 489 goto out; 490 491 mutex_lock(&dev->mode_config.fb_lock); 492 dev->mode_config.num_fb++; 493 list_add(&fb->head, &dev->mode_config.fb_list); 494 mutex_unlock(&dev->mode_config.fb_lock); 495 496 drm_mode_object_register(dev, &fb->base); 497 out: 498 return ret; 499 } 500 EXPORT_SYMBOL(drm_framebuffer_init); 501 502 /** 503 * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference 504 * @dev: drm device 505 * @id: id of the fb object 506 * 507 * If successful, this grabs an additional reference to the framebuffer - 508 * callers need to make sure to eventually unreference the returned framebuffer 509 * again, using @drm_framebuffer_unreference. 510 */ 511 struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev, 512 uint32_t id) 513 { 514 struct drm_mode_object *obj; 515 struct drm_framebuffer *fb = NULL; 516 517 obj = _object_find(dev, id, DRM_MODE_OBJECT_FB); 518 if (obj) 519 fb = obj_to_fb(obj); 520 return fb; 521 } 522 EXPORT_SYMBOL(drm_framebuffer_lookup); 523 524 /** 525 * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr 526 * @fb: fb to unregister 527 * 528 * Drivers need to call this when cleaning up driver-private framebuffers, e.g. 529 * those used for fbdev. Note that the caller must hold a reference of it's own, 530 * i.e. the object may not be destroyed through this call (since it'll lead to a 531 * locking inversion). 532 */ 533 void drm_framebuffer_unregister_private(struct drm_framebuffer *fb) 534 { 535 struct drm_device *dev; 536 537 if (!fb) 538 return; 539 540 dev = fb->dev; 541 542 /* Mark fb as reaped and drop idr ref. */ 543 drm_mode_object_unregister(dev, &fb->base); 544 } 545 EXPORT_SYMBOL(drm_framebuffer_unregister_private); 546 547 /** 548 * drm_framebuffer_cleanup - remove a framebuffer object 549 * @fb: framebuffer to remove 550 * 551 * Cleanup framebuffer. This function is intended to be used from the drivers 552 * ->destroy callback. It can also be used to clean up driver private 553 * framebuffers embedded into a larger structure. 554 * 555 * Note that this function does not remove the fb from active usuage - if it is 556 * still used anywhere, hilarity can ensue since userspace could call getfb on 557 * the id and get back -EINVAL. Obviously no concern at driver unload time. 558 * 559 * Also, the framebuffer will not be removed from the lookup idr - for 560 * user-created framebuffers this will happen in in the rmfb ioctl. For 561 * driver-private objects (e.g. for fbdev) drivers need to explicitly call 562 * drm_framebuffer_unregister_private. 563 */ 564 void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 565 { 566 struct drm_device *dev = fb->dev; 567 568 mutex_lock(&dev->mode_config.fb_lock); 569 list_del(&fb->head); 570 dev->mode_config.num_fb--; 571 mutex_unlock(&dev->mode_config.fb_lock); 572 } 573 EXPORT_SYMBOL(drm_framebuffer_cleanup); 574 575 /** 576 * drm_framebuffer_remove - remove and unreference a framebuffer object 577 * @fb: framebuffer to remove 578 * 579 * Scans all the CRTCs and planes in @dev's mode_config. If they're 580 * using @fb, removes it, setting it to NULL. Then drops the reference to the 581 * passed-in framebuffer. Might take the modeset locks. 582 * 583 * Note that this function optimizes the cleanup away if the caller holds the 584 * last reference to the framebuffer. It is also guaranteed to not take the 585 * modeset locks in this case. 586 */ 587 void drm_framebuffer_remove(struct drm_framebuffer *fb) 588 { 589 struct drm_device *dev; 590 struct drm_crtc *crtc; 591 struct drm_plane *plane; 592 593 if (!fb) 594 return; 595 596 dev = fb->dev; 597 598 WARN_ON(!list_empty(&fb->filp_head)); 599 600 /* 601 * drm ABI mandates that we remove any deleted framebuffers from active 602 * useage. But since most sane clients only remove framebuffers they no 603 * longer need, try to optimize this away. 604 * 605 * Since we're holding a reference ourselves, observing a refcount of 1 606 * means that we're the last holder and can skip it. Also, the refcount 607 * can never increase from 1 again, so we don't need any barriers or 608 * locks. 609 * 610 * Note that userspace could try to race with use and instate a new 611 * usage _after_ we've cleared all current ones. End result will be an 612 * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot 613 * in this manner. 614 */ 615 if (drm_framebuffer_read_refcount(fb) > 1) { 616 drm_modeset_lock_all(dev); 617 /* remove from any CRTC */ 618 drm_for_each_crtc(crtc, dev) { 619 if (crtc->primary->fb == fb) { 620 /* should turn off the crtc */ 621 if (drm_crtc_force_disable(crtc)) 622 DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc); 623 } 624 } 625 626 drm_for_each_plane(plane, dev) { 627 if (plane->fb == fb) 628 drm_plane_force_disable(plane); 629 } 630 drm_modeset_unlock_all(dev); 631 } 632 633 drm_framebuffer_unreference(fb); 634 } 635 EXPORT_SYMBOL(drm_framebuffer_remove); 636 637 DEFINE_WW_CLASS(crtc_ww_class); 638 639 static unsigned int drm_num_crtcs(struct drm_device *dev) 640 { 641 unsigned int num = 0; 642 struct drm_crtc *tmp; 643 644 drm_for_each_crtc(tmp, dev) { 645 num++; 646 } 647 648 return num; 649 } 650 651 static int drm_crtc_register_all(struct drm_device *dev) 652 { 653 struct drm_crtc *crtc; 654 int ret = 0; 655 656 drm_for_each_crtc(crtc, dev) { 657 if (crtc->funcs->late_register) 658 ret = crtc->funcs->late_register(crtc); 659 if (ret) 660 return ret; 661 } 662 663 return 0; 664 } 665 666 static void drm_crtc_unregister_all(struct drm_device *dev) 667 { 668 struct drm_crtc *crtc; 669 670 drm_for_each_crtc(crtc, dev) { 671 if (crtc->funcs->early_unregister) 672 crtc->funcs->early_unregister(crtc); 673 } 674 } 675 676 /** 677 * drm_crtc_init_with_planes - Initialise a new CRTC object with 678 * specified primary and cursor planes. 679 * @dev: DRM device 680 * @crtc: CRTC object to init 681 * @primary: Primary plane for CRTC 682 * @cursor: Cursor plane for CRTC 683 * @funcs: callbacks for the new CRTC 684 * @name: printf style format string for the CRTC name, or NULL for default name 685 * 686 * Inits a new object created as base part of a driver crtc object. 687 * 688 * Returns: 689 * Zero on success, error code on failure. 690 */ 691 int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, 692 struct drm_plane *primary, 693 struct drm_plane *cursor, 694 const struct drm_crtc_funcs *funcs, 695 const char *name, ...) 696 { 697 struct drm_mode_config *config = &dev->mode_config; 698 int ret; 699 700 WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY); 701 WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR); 702 703 crtc->dev = dev; 704 crtc->funcs = funcs; 705 706 INIT_LIST_HEAD(&crtc->commit_list); 707 spin_lock_init(&crtc->commit_lock); 708 709 drm_modeset_lock_init(&crtc->mutex); 710 ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC); 711 if (ret) 712 return ret; 713 714 if (name) { 715 va_list ap; 716 717 va_start(ap, name); 718 crtc->name = kvasprintf(GFP_KERNEL, name, ap); 719 va_end(ap); 720 } else { 721 crtc->name = kasprintf(GFP_KERNEL, "crtc-%d", 722 drm_num_crtcs(dev)); 723 } 724 if (!crtc->name) { 725 drm_mode_object_unregister(dev, &crtc->base); 726 return -ENOMEM; 727 } 728 729 crtc->base.properties = &crtc->properties; 730 731 list_add_tail(&crtc->head, &config->crtc_list); 732 crtc->index = config->num_crtc++; 733 734 crtc->primary = primary; 735 crtc->cursor = cursor; 736 if (primary) 737 primary->possible_crtcs = 1 << drm_crtc_index(crtc); 738 if (cursor) 739 cursor->possible_crtcs = 1 << drm_crtc_index(crtc); 740 741 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 742 drm_object_attach_property(&crtc->base, config->prop_active, 0); 743 drm_object_attach_property(&crtc->base, config->prop_mode_id, 0); 744 } 745 746 return 0; 747 } 748 EXPORT_SYMBOL(drm_crtc_init_with_planes); 749 750 /** 751 * drm_crtc_cleanup - Clean up the core crtc usage 752 * @crtc: CRTC to cleanup 753 * 754 * This function cleans up @crtc and removes it from the DRM mode setting 755 * core. Note that the function does *not* free the crtc structure itself, 756 * this is the responsibility of the caller. 757 */ 758 void drm_crtc_cleanup(struct drm_crtc *crtc) 759 { 760 struct drm_device *dev = crtc->dev; 761 762 /* Note that the crtc_list is considered to be static; should we 763 * remove the drm_crtc at runtime we would have to decrement all 764 * the indices on the drm_crtc after us in the crtc_list. 765 */ 766 767 kfree(crtc->gamma_store); 768 crtc->gamma_store = NULL; 769 770 drm_modeset_lock_fini(&crtc->mutex); 771 772 drm_mode_object_unregister(dev, &crtc->base); 773 list_del(&crtc->head); 774 dev->mode_config.num_crtc--; 775 776 WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state); 777 if (crtc->state && crtc->funcs->atomic_destroy_state) 778 crtc->funcs->atomic_destroy_state(crtc, crtc->state); 779 780 kfree(crtc->name); 781 782 memset(crtc, 0, sizeof(*crtc)); 783 } 784 EXPORT_SYMBOL(drm_crtc_cleanup); 785 786 /* 787 * drm_mode_remove - remove and free a mode 788 * @connector: connector list to modify 789 * @mode: mode to remove 790 * 791 * Remove @mode from @connector's mode list, then free it. 792 */ 793 static void drm_mode_remove(struct drm_connector *connector, 794 struct drm_display_mode *mode) 795 { 796 list_del(&mode->head); 797 drm_mode_destroy(connector->dev, mode); 798 } 799 800 /** 801 * drm_display_info_set_bus_formats - set the supported bus formats 802 * @info: display info to store bus formats in 803 * @formats: array containing the supported bus formats 804 * @num_formats: the number of entries in the fmts array 805 * 806 * Store the supported bus formats in display info structure. 807 * See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for 808 * a full list of available formats. 809 */ 810 int drm_display_info_set_bus_formats(struct drm_display_info *info, 811 const u32 *formats, 812 unsigned int num_formats) 813 { 814 u32 *fmts = NULL; 815 816 if (!formats && num_formats) 817 return -EINVAL; 818 819 if (formats && num_formats) { 820 fmts = kmemdup(formats, sizeof(*formats) * num_formats, 821 GFP_KERNEL); 822 if (!fmts) 823 return -ENOMEM; 824 } 825 826 kfree(info->bus_formats); 827 info->bus_formats = fmts; 828 info->num_bus_formats = num_formats; 829 830 return 0; 831 } 832 EXPORT_SYMBOL(drm_display_info_set_bus_formats); 833 834 /** 835 * drm_connector_get_cmdline_mode - reads the user's cmdline mode 836 * @connector: connector to quwery 837 * 838 * The kernel supports per-connector configration of its consoles through 839 * use of the video= parameter. This function parses that option and 840 * extracts the user's specified mode (or enable/disable status) for a 841 * particular connector. This is typically only used during the early fbdev 842 * setup. 843 */ 844 static void drm_connector_get_cmdline_mode(struct drm_connector *connector) 845 { 846 struct drm_cmdline_mode *mode = &connector->cmdline_mode; 847 char *option = NULL; 848 849 if (fb_get_options(connector->name, &option)) 850 return; 851 852 if (!drm_mode_parse_command_line_for_connector(option, 853 connector, 854 mode)) 855 return; 856 857 if (mode->force) { 858 const char *s; 859 860 switch (mode->force) { 861 case DRM_FORCE_OFF: 862 s = "OFF"; 863 break; 864 case DRM_FORCE_ON_DIGITAL: 865 s = "ON - dig"; 866 break; 867 default: 868 case DRM_FORCE_ON: 869 s = "ON"; 870 break; 871 } 872 873 DRM_INFO("forcing %s connector %s\n", connector->name, s); 874 connector->force = mode->force; 875 } 876 877 DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", 878 connector->name, 879 mode->xres, mode->yres, 880 mode->refresh_specified ? mode->refresh : 60, 881 mode->rb ? " reduced blanking" : "", 882 mode->margins ? " with margins" : "", 883 mode->interlace ? " interlaced" : ""); 884 } 885 886 static void drm_connector_free(struct kref *kref) 887 { 888 struct drm_connector *connector = 889 container_of(kref, struct drm_connector, base.refcount); 890 struct drm_device *dev = connector->dev; 891 892 drm_mode_object_unregister(dev, &connector->base); 893 connector->funcs->destroy(connector); 894 } 895 896 /** 897 * drm_connector_init - Init a preallocated connector 898 * @dev: DRM device 899 * @connector: the connector to init 900 * @funcs: callbacks for this connector 901 * @connector_type: user visible type of the connector 902 * 903 * Initialises a preallocated connector. Connectors should be 904 * subclassed as part of driver connector objects. 905 * 906 * Returns: 907 * Zero on success, error code on failure. 908 */ 909 int drm_connector_init(struct drm_device *dev, 910 struct drm_connector *connector, 911 const struct drm_connector_funcs *funcs, 912 int connector_type) 913 { 914 struct drm_mode_config *config = &dev->mode_config; 915 int ret; 916 struct ida *connector_ida = 917 &drm_connector_enum_list[connector_type].ida; 918 919 drm_modeset_lock_all(dev); 920 921 ret = drm_mode_object_get_reg(dev, &connector->base, 922 DRM_MODE_OBJECT_CONNECTOR, 923 false, drm_connector_free); 924 if (ret) 925 goto out_unlock; 926 927 connector->base.properties = &connector->properties; 928 connector->dev = dev; 929 connector->funcs = funcs; 930 931 ret = ida_simple_get(&config->connector_ida, 0, 0, GFP_KERNEL); 932 if (ret < 0) 933 goto out_put; 934 connector->index = ret; 935 ret = 0; 936 937 connector->connector_type = connector_type; 938 connector->connector_type_id = 939 ida_simple_get(connector_ida, 1, 0, GFP_KERNEL); 940 if (connector->connector_type_id < 0) { 941 ret = connector->connector_type_id; 942 goto out_put_id; 943 } 944 connector->name = 945 kasprintf(GFP_KERNEL, "%s-%d", 946 drm_connector_enum_list[connector_type].name, 947 connector->connector_type_id); 948 if (!connector->name) { 949 ret = -ENOMEM; 950 goto out_put_type_id; 951 } 952 953 INIT_LIST_HEAD(&connector->probed_modes); 954 INIT_LIST_HEAD(&connector->modes); 955 connector->edid_blob_ptr = NULL; 956 connector->status = connector_status_unknown; 957 958 drm_connector_get_cmdline_mode(connector); 959 960 /* We should add connectors at the end to avoid upsetting the connector 961 * index too much. */ 962 list_add_tail(&connector->head, &config->connector_list); 963 config->num_connector++; 964 965 if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) 966 drm_object_attach_property(&connector->base, 967 config->edid_property, 968 0); 969 970 drm_object_attach_property(&connector->base, 971 config->dpms_property, 0); 972 973 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 974 drm_object_attach_property(&connector->base, config->prop_crtc_id, 0); 975 } 976 977 connector->debugfs_entry = NULL; 978 out_put_type_id: 979 if (ret) 980 ida_remove(connector_ida, connector->connector_type_id); 981 out_put_id: 982 if (ret) 983 ida_remove(&config->connector_ida, connector->index); 984 out_put: 985 if (ret) 986 drm_mode_object_unregister(dev, &connector->base); 987 988 out_unlock: 989 drm_modeset_unlock_all(dev); 990 991 return ret; 992 } 993 EXPORT_SYMBOL(drm_connector_init); 994 995 /** 996 * drm_connector_cleanup - cleans up an initialised connector 997 * @connector: connector to cleanup 998 * 999 * Cleans up the connector but doesn't free the object. 1000 */ 1001 void drm_connector_cleanup(struct drm_connector *connector) 1002 { 1003 struct drm_device *dev = connector->dev; 1004 struct drm_display_mode *mode, *t; 1005 1006 /* The connector should have been removed from userspace long before 1007 * it is finally destroyed. 1008 */ 1009 if (WARN_ON(connector->registered)) 1010 drm_connector_unregister(connector); 1011 1012 if (connector->tile_group) { 1013 drm_mode_put_tile_group(dev, connector->tile_group); 1014 connector->tile_group = NULL; 1015 } 1016 1017 list_for_each_entry_safe(mode, t, &connector->probed_modes, head) 1018 drm_mode_remove(connector, mode); 1019 1020 list_for_each_entry_safe(mode, t, &connector->modes, head) 1021 drm_mode_remove(connector, mode); 1022 1023 ida_remove(&drm_connector_enum_list[connector->connector_type].ida, 1024 connector->connector_type_id); 1025 1026 ida_remove(&dev->mode_config.connector_ida, 1027 connector->index); 1028 1029 kfree(connector->display_info.bus_formats); 1030 drm_mode_object_unregister(dev, &connector->base); 1031 kfree(connector->name); 1032 connector->name = NULL; 1033 list_del(&connector->head); 1034 dev->mode_config.num_connector--; 1035 1036 WARN_ON(connector->state && !connector->funcs->atomic_destroy_state); 1037 if (connector->state && connector->funcs->atomic_destroy_state) 1038 connector->funcs->atomic_destroy_state(connector, 1039 connector->state); 1040 1041 memset(connector, 0, sizeof(*connector)); 1042 } 1043 EXPORT_SYMBOL(drm_connector_cleanup); 1044 1045 /** 1046 * drm_connector_register - register a connector 1047 * @connector: the connector to register 1048 * 1049 * Register userspace interfaces for a connector 1050 * 1051 * Returns: 1052 * Zero on success, error code on failure. 1053 */ 1054 int drm_connector_register(struct drm_connector *connector) 1055 { 1056 int ret; 1057 1058 if (connector->registered) 1059 return 0; 1060 1061 ret = drm_sysfs_connector_add(connector); 1062 if (ret) 1063 return ret; 1064 1065 ret = drm_debugfs_connector_add(connector); 1066 if (ret) { 1067 goto err_sysfs; 1068 } 1069 1070 if (connector->funcs->late_register) { 1071 ret = connector->funcs->late_register(connector); 1072 if (ret) 1073 goto err_debugfs; 1074 } 1075 1076 drm_mode_object_register(connector->dev, &connector->base); 1077 1078 connector->registered = true; 1079 return 0; 1080 1081 err_debugfs: 1082 drm_debugfs_connector_remove(connector); 1083 err_sysfs: 1084 drm_sysfs_connector_remove(connector); 1085 return ret; 1086 } 1087 EXPORT_SYMBOL(drm_connector_register); 1088 1089 /** 1090 * drm_connector_unregister - unregister a connector 1091 * @connector: the connector to unregister 1092 * 1093 * Unregister userspace interfaces for a connector 1094 */ 1095 void drm_connector_unregister(struct drm_connector *connector) 1096 { 1097 if (!connector->registered) 1098 return; 1099 1100 if (connector->funcs->early_unregister) 1101 connector->funcs->early_unregister(connector); 1102 1103 drm_sysfs_connector_remove(connector); 1104 drm_debugfs_connector_remove(connector); 1105 1106 connector->registered = false; 1107 } 1108 EXPORT_SYMBOL(drm_connector_unregister); 1109 1110 static void drm_connector_unregister_all(struct drm_device *dev) 1111 { 1112 struct drm_connector *connector; 1113 1114 /* FIXME: taking the mode config mutex ends up in a clash with sysfs */ 1115 list_for_each_entry(connector, &dev->mode_config.connector_list, head) 1116 drm_connector_unregister(connector); 1117 } 1118 1119 static int drm_connector_register_all(struct drm_device *dev) 1120 { 1121 struct drm_connector *connector; 1122 int ret; 1123 1124 mutex_lock(&dev->mode_config.mutex); 1125 1126 drm_for_each_connector(connector, dev) { 1127 ret = drm_connector_register(connector); 1128 if (ret) 1129 goto err; 1130 } 1131 1132 mutex_unlock(&dev->mode_config.mutex); 1133 1134 return 0; 1135 1136 err: 1137 mutex_unlock(&dev->mode_config.mutex); 1138 drm_connector_unregister_all(dev); 1139 return ret; 1140 } 1141 1142 static int drm_encoder_register_all(struct drm_device *dev) 1143 { 1144 struct drm_encoder *encoder; 1145 int ret = 0; 1146 1147 drm_for_each_encoder(encoder, dev) { 1148 if (encoder->funcs->late_register) 1149 ret = encoder->funcs->late_register(encoder); 1150 if (ret) 1151 return ret; 1152 } 1153 1154 return 0; 1155 } 1156 1157 static void drm_encoder_unregister_all(struct drm_device *dev) 1158 { 1159 struct drm_encoder *encoder; 1160 1161 drm_for_each_encoder(encoder, dev) { 1162 if (encoder->funcs->early_unregister) 1163 encoder->funcs->early_unregister(encoder); 1164 } 1165 } 1166 1167 /** 1168 * drm_encoder_init - Init a preallocated encoder 1169 * @dev: drm device 1170 * @encoder: the encoder to init 1171 * @funcs: callbacks for this encoder 1172 * @encoder_type: user visible type of the encoder 1173 * @name: printf style format string for the encoder name, or NULL for default name 1174 * 1175 * Initialises a preallocated encoder. Encoder should be 1176 * subclassed as part of driver encoder objects. 1177 * 1178 * Returns: 1179 * Zero on success, error code on failure. 1180 */ 1181 int drm_encoder_init(struct drm_device *dev, 1182 struct drm_encoder *encoder, 1183 const struct drm_encoder_funcs *funcs, 1184 int encoder_type, const char *name, ...) 1185 { 1186 int ret; 1187 1188 drm_modeset_lock_all(dev); 1189 1190 ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER); 1191 if (ret) 1192 goto out_unlock; 1193 1194 encoder->dev = dev; 1195 encoder->encoder_type = encoder_type; 1196 encoder->funcs = funcs; 1197 if (name) { 1198 va_list ap; 1199 1200 va_start(ap, name); 1201 encoder->name = kvasprintf(GFP_KERNEL, name, ap); 1202 va_end(ap); 1203 } else { 1204 encoder->name = kasprintf(GFP_KERNEL, "%s-%d", 1205 drm_encoder_enum_list[encoder_type].name, 1206 encoder->base.id); 1207 } 1208 if (!encoder->name) { 1209 ret = -ENOMEM; 1210 goto out_put; 1211 } 1212 1213 list_add_tail(&encoder->head, &dev->mode_config.encoder_list); 1214 encoder->index = dev->mode_config.num_encoder++; 1215 1216 out_put: 1217 if (ret) 1218 drm_mode_object_unregister(dev, &encoder->base); 1219 1220 out_unlock: 1221 drm_modeset_unlock_all(dev); 1222 1223 return ret; 1224 } 1225 EXPORT_SYMBOL(drm_encoder_init); 1226 1227 /** 1228 * drm_encoder_cleanup - cleans up an initialised encoder 1229 * @encoder: encoder to cleanup 1230 * 1231 * Cleans up the encoder but doesn't free the object. 1232 */ 1233 void drm_encoder_cleanup(struct drm_encoder *encoder) 1234 { 1235 struct drm_device *dev = encoder->dev; 1236 1237 /* Note that the encoder_list is considered to be static; should we 1238 * remove the drm_encoder at runtime we would have to decrement all 1239 * the indices on the drm_encoder after us in the encoder_list. 1240 */ 1241 1242 drm_modeset_lock_all(dev); 1243 drm_mode_object_unregister(dev, &encoder->base); 1244 kfree(encoder->name); 1245 list_del(&encoder->head); 1246 dev->mode_config.num_encoder--; 1247 drm_modeset_unlock_all(dev); 1248 1249 memset(encoder, 0, sizeof(*encoder)); 1250 } 1251 EXPORT_SYMBOL(drm_encoder_cleanup); 1252 1253 static unsigned int drm_num_planes(struct drm_device *dev) 1254 { 1255 unsigned int num = 0; 1256 struct drm_plane *tmp; 1257 1258 drm_for_each_plane(tmp, dev) { 1259 num++; 1260 } 1261 1262 return num; 1263 } 1264 1265 /** 1266 * drm_universal_plane_init - Initialize a new universal plane object 1267 * @dev: DRM device 1268 * @plane: plane object to init 1269 * @possible_crtcs: bitmask of possible CRTCs 1270 * @funcs: callbacks for the new plane 1271 * @formats: array of supported formats (%DRM_FORMAT_*) 1272 * @format_count: number of elements in @formats 1273 * @type: type of plane (overlay, primary, cursor) 1274 * @name: printf style format string for the plane name, or NULL for default name 1275 * 1276 * Initializes a plane object of type @type. 1277 * 1278 * Returns: 1279 * Zero on success, error code on failure. 1280 */ 1281 int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, 1282 unsigned long possible_crtcs, 1283 const struct drm_plane_funcs *funcs, 1284 const uint32_t *formats, unsigned int format_count, 1285 enum drm_plane_type type, 1286 const char *name, ...) 1287 { 1288 struct drm_mode_config *config = &dev->mode_config; 1289 int ret; 1290 1291 ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE); 1292 if (ret) 1293 return ret; 1294 1295 drm_modeset_lock_init(&plane->mutex); 1296 1297 plane->base.properties = &plane->properties; 1298 plane->dev = dev; 1299 plane->funcs = funcs; 1300 plane->format_types = kmalloc_array(format_count, sizeof(uint32_t), 1301 GFP_KERNEL); 1302 if (!plane->format_types) { 1303 DRM_DEBUG_KMS("out of memory when allocating plane\n"); 1304 drm_mode_object_unregister(dev, &plane->base); 1305 return -ENOMEM; 1306 } 1307 1308 if (name) { 1309 va_list ap; 1310 1311 va_start(ap, name); 1312 plane->name = kvasprintf(GFP_KERNEL, name, ap); 1313 va_end(ap); 1314 } else { 1315 plane->name = kasprintf(GFP_KERNEL, "plane-%d", 1316 drm_num_planes(dev)); 1317 } 1318 if (!plane->name) { 1319 kfree(plane->format_types); 1320 drm_mode_object_unregister(dev, &plane->base); 1321 return -ENOMEM; 1322 } 1323 1324 memcpy(plane->format_types, formats, format_count * sizeof(uint32_t)); 1325 plane->format_count = format_count; 1326 plane->possible_crtcs = possible_crtcs; 1327 plane->type = type; 1328 1329 list_add_tail(&plane->head, &config->plane_list); 1330 plane->index = config->num_total_plane++; 1331 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1332 config->num_overlay_plane++; 1333 1334 drm_object_attach_property(&plane->base, 1335 config->plane_type_property, 1336 plane->type); 1337 1338 if (drm_core_check_feature(dev, DRIVER_ATOMIC)) { 1339 drm_object_attach_property(&plane->base, config->prop_fb_id, 0); 1340 drm_object_attach_property(&plane->base, config->prop_crtc_id, 0); 1341 drm_object_attach_property(&plane->base, config->prop_crtc_x, 0); 1342 drm_object_attach_property(&plane->base, config->prop_crtc_y, 0); 1343 drm_object_attach_property(&plane->base, config->prop_crtc_w, 0); 1344 drm_object_attach_property(&plane->base, config->prop_crtc_h, 0); 1345 drm_object_attach_property(&plane->base, config->prop_src_x, 0); 1346 drm_object_attach_property(&plane->base, config->prop_src_y, 0); 1347 drm_object_attach_property(&plane->base, config->prop_src_w, 0); 1348 drm_object_attach_property(&plane->base, config->prop_src_h, 0); 1349 } 1350 1351 return 0; 1352 } 1353 EXPORT_SYMBOL(drm_universal_plane_init); 1354 1355 static int drm_plane_register_all(struct drm_device *dev) 1356 { 1357 struct drm_plane *plane; 1358 int ret = 0; 1359 1360 drm_for_each_plane(plane, dev) { 1361 if (plane->funcs->late_register) 1362 ret = plane->funcs->late_register(plane); 1363 if (ret) 1364 return ret; 1365 } 1366 1367 return 0; 1368 } 1369 1370 static void drm_plane_unregister_all(struct drm_device *dev) 1371 { 1372 struct drm_plane *plane; 1373 1374 drm_for_each_plane(plane, dev) { 1375 if (plane->funcs->early_unregister) 1376 plane->funcs->early_unregister(plane); 1377 } 1378 } 1379 1380 /** 1381 * drm_plane_init - Initialize a legacy plane 1382 * @dev: DRM device 1383 * @plane: plane object to init 1384 * @possible_crtcs: bitmask of possible CRTCs 1385 * @funcs: callbacks for the new plane 1386 * @formats: array of supported formats (%DRM_FORMAT_*) 1387 * @format_count: number of elements in @formats 1388 * @is_primary: plane type (primary vs overlay) 1389 * 1390 * Legacy API to initialize a DRM plane. 1391 * 1392 * New drivers should call drm_universal_plane_init() instead. 1393 * 1394 * Returns: 1395 * Zero on success, error code on failure. 1396 */ 1397 int drm_plane_init(struct drm_device *dev, struct drm_plane *plane, 1398 unsigned long possible_crtcs, 1399 const struct drm_plane_funcs *funcs, 1400 const uint32_t *formats, unsigned int format_count, 1401 bool is_primary) 1402 { 1403 enum drm_plane_type type; 1404 1405 type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY; 1406 return drm_universal_plane_init(dev, plane, possible_crtcs, funcs, 1407 formats, format_count, type, NULL); 1408 } 1409 EXPORT_SYMBOL(drm_plane_init); 1410 1411 /** 1412 * drm_plane_cleanup - Clean up the core plane usage 1413 * @plane: plane to cleanup 1414 * 1415 * This function cleans up @plane and removes it from the DRM mode setting 1416 * core. Note that the function does *not* free the plane structure itself, 1417 * this is the responsibility of the caller. 1418 */ 1419 void drm_plane_cleanup(struct drm_plane *plane) 1420 { 1421 struct drm_device *dev = plane->dev; 1422 1423 drm_modeset_lock_all(dev); 1424 kfree(plane->format_types); 1425 drm_mode_object_unregister(dev, &plane->base); 1426 1427 BUG_ON(list_empty(&plane->head)); 1428 1429 /* Note that the plane_list is considered to be static; should we 1430 * remove the drm_plane at runtime we would have to decrement all 1431 * the indices on the drm_plane after us in the plane_list. 1432 */ 1433 1434 list_del(&plane->head); 1435 dev->mode_config.num_total_plane--; 1436 if (plane->type == DRM_PLANE_TYPE_OVERLAY) 1437 dev->mode_config.num_overlay_plane--; 1438 drm_modeset_unlock_all(dev); 1439 1440 WARN_ON(plane->state && !plane->funcs->atomic_destroy_state); 1441 if (plane->state && plane->funcs->atomic_destroy_state) 1442 plane->funcs->atomic_destroy_state(plane, plane->state); 1443 1444 kfree(plane->name); 1445 1446 memset(plane, 0, sizeof(*plane)); 1447 } 1448 EXPORT_SYMBOL(drm_plane_cleanup); 1449 1450 /** 1451 * drm_plane_from_index - find the registered plane at an index 1452 * @dev: DRM device 1453 * @idx: index of registered plane to find for 1454 * 1455 * Given a plane index, return the registered plane from DRM device's 1456 * list of planes with matching index. 1457 */ 1458 struct drm_plane * 1459 drm_plane_from_index(struct drm_device *dev, int idx) 1460 { 1461 struct drm_plane *plane; 1462 1463 drm_for_each_plane(plane, dev) 1464 if (idx == plane->index) 1465 return plane; 1466 1467 return NULL; 1468 } 1469 EXPORT_SYMBOL(drm_plane_from_index); 1470 1471 /** 1472 * drm_plane_force_disable - Forcibly disable a plane 1473 * @plane: plane to disable 1474 * 1475 * Forces the plane to be disabled. 1476 * 1477 * Used when the plane's current framebuffer is destroyed, 1478 * and when restoring fbdev mode. 1479 */ 1480 void drm_plane_force_disable(struct drm_plane *plane) 1481 { 1482 int ret; 1483 1484 if (!plane->fb) 1485 return; 1486 1487 plane->old_fb = plane->fb; 1488 ret = plane->funcs->disable_plane(plane); 1489 if (ret) { 1490 DRM_ERROR("failed to disable plane with busy fb\n"); 1491 plane->old_fb = NULL; 1492 return; 1493 } 1494 /* disconnect the plane from the fb and crtc: */ 1495 drm_framebuffer_unreference(plane->old_fb); 1496 plane->old_fb = NULL; 1497 plane->fb = NULL; 1498 plane->crtc = NULL; 1499 } 1500 EXPORT_SYMBOL(drm_plane_force_disable); 1501 1502 int drm_modeset_register_all(struct drm_device *dev) 1503 { 1504 int ret; 1505 1506 ret = drm_plane_register_all(dev); 1507 if (ret) 1508 goto err_plane; 1509 1510 ret = drm_crtc_register_all(dev); 1511 if (ret) 1512 goto err_crtc; 1513 1514 ret = drm_encoder_register_all(dev); 1515 if (ret) 1516 goto err_encoder; 1517 1518 ret = drm_connector_register_all(dev); 1519 if (ret) 1520 goto err_connector; 1521 1522 return 0; 1523 1524 err_connector: 1525 drm_encoder_unregister_all(dev); 1526 err_encoder: 1527 drm_crtc_unregister_all(dev); 1528 err_crtc: 1529 drm_plane_unregister_all(dev); 1530 err_plane: 1531 return ret; 1532 } 1533 1534 void drm_modeset_unregister_all(struct drm_device *dev) 1535 { 1536 drm_connector_unregister_all(dev); 1537 drm_encoder_unregister_all(dev); 1538 drm_crtc_unregister_all(dev); 1539 drm_plane_unregister_all(dev); 1540 } 1541 1542 static int drm_mode_create_standard_properties(struct drm_device *dev) 1543 { 1544 struct drm_property *prop; 1545 1546 /* 1547 * Standard properties (apply to all connectors) 1548 */ 1549 prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | 1550 DRM_MODE_PROP_IMMUTABLE, 1551 "EDID", 0); 1552 if (!prop) 1553 return -ENOMEM; 1554 dev->mode_config.edid_property = prop; 1555 1556 prop = drm_property_create_enum(dev, 0, 1557 "DPMS", drm_dpms_enum_list, 1558 ARRAY_SIZE(drm_dpms_enum_list)); 1559 if (!prop) 1560 return -ENOMEM; 1561 dev->mode_config.dpms_property = prop; 1562 1563 prop = drm_property_create(dev, 1564 DRM_MODE_PROP_BLOB | 1565 DRM_MODE_PROP_IMMUTABLE, 1566 "PATH", 0); 1567 if (!prop) 1568 return -ENOMEM; 1569 dev->mode_config.path_property = prop; 1570 1571 prop = drm_property_create(dev, 1572 DRM_MODE_PROP_BLOB | 1573 DRM_MODE_PROP_IMMUTABLE, 1574 "TILE", 0); 1575 if (!prop) 1576 return -ENOMEM; 1577 dev->mode_config.tile_property = prop; 1578 1579 prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1580 "type", drm_plane_type_enum_list, 1581 ARRAY_SIZE(drm_plane_type_enum_list)); 1582 if (!prop) 1583 return -ENOMEM; 1584 dev->mode_config.plane_type_property = prop; 1585 1586 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1587 "SRC_X", 0, UINT_MAX); 1588 if (!prop) 1589 return -ENOMEM; 1590 dev->mode_config.prop_src_x = prop; 1591 1592 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1593 "SRC_Y", 0, UINT_MAX); 1594 if (!prop) 1595 return -ENOMEM; 1596 dev->mode_config.prop_src_y = prop; 1597 1598 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1599 "SRC_W", 0, UINT_MAX); 1600 if (!prop) 1601 return -ENOMEM; 1602 dev->mode_config.prop_src_w = prop; 1603 1604 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1605 "SRC_H", 0, UINT_MAX); 1606 if (!prop) 1607 return -ENOMEM; 1608 dev->mode_config.prop_src_h = prop; 1609 1610 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1611 "CRTC_X", INT_MIN, INT_MAX); 1612 if (!prop) 1613 return -ENOMEM; 1614 dev->mode_config.prop_crtc_x = prop; 1615 1616 prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC, 1617 "CRTC_Y", INT_MIN, INT_MAX); 1618 if (!prop) 1619 return -ENOMEM; 1620 dev->mode_config.prop_crtc_y = prop; 1621 1622 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1623 "CRTC_W", 0, INT_MAX); 1624 if (!prop) 1625 return -ENOMEM; 1626 dev->mode_config.prop_crtc_w = prop; 1627 1628 prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, 1629 "CRTC_H", 0, INT_MAX); 1630 if (!prop) 1631 return -ENOMEM; 1632 dev->mode_config.prop_crtc_h = prop; 1633 1634 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1635 "FB_ID", DRM_MODE_OBJECT_FB); 1636 if (!prop) 1637 return -ENOMEM; 1638 dev->mode_config.prop_fb_id = prop; 1639 1640 prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, 1641 "CRTC_ID", DRM_MODE_OBJECT_CRTC); 1642 if (!prop) 1643 return -ENOMEM; 1644 dev->mode_config.prop_crtc_id = prop; 1645 1646 prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC, 1647 "ACTIVE"); 1648 if (!prop) 1649 return -ENOMEM; 1650 dev->mode_config.prop_active = prop; 1651 1652 prop = drm_property_create(dev, 1653 DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB, 1654 "MODE_ID", 0); 1655 if (!prop) 1656 return -ENOMEM; 1657 dev->mode_config.prop_mode_id = prop; 1658 1659 prop = drm_property_create(dev, 1660 DRM_MODE_PROP_BLOB, 1661 "DEGAMMA_LUT", 0); 1662 if (!prop) 1663 return -ENOMEM; 1664 dev->mode_config.degamma_lut_property = prop; 1665 1666 prop = drm_property_create_range(dev, 1667 DRM_MODE_PROP_IMMUTABLE, 1668 "DEGAMMA_LUT_SIZE", 0, UINT_MAX); 1669 if (!prop) 1670 return -ENOMEM; 1671 dev->mode_config.degamma_lut_size_property = prop; 1672 1673 prop = drm_property_create(dev, 1674 DRM_MODE_PROP_BLOB, 1675 "CTM", 0); 1676 if (!prop) 1677 return -ENOMEM; 1678 dev->mode_config.ctm_property = prop; 1679 1680 prop = drm_property_create(dev, 1681 DRM_MODE_PROP_BLOB, 1682 "GAMMA_LUT", 0); 1683 if (!prop) 1684 return -ENOMEM; 1685 dev->mode_config.gamma_lut_property = prop; 1686 1687 prop = drm_property_create_range(dev, 1688 DRM_MODE_PROP_IMMUTABLE, 1689 "GAMMA_LUT_SIZE", 0, UINT_MAX); 1690 if (!prop) 1691 return -ENOMEM; 1692 dev->mode_config.gamma_lut_size_property = prop; 1693 1694 return 0; 1695 } 1696 1697 /** 1698 * drm_mode_create_dvi_i_properties - create DVI-I specific connector properties 1699 * @dev: DRM device 1700 * 1701 * Called by a driver the first time a DVI-I connector is made. 1702 */ 1703 int drm_mode_create_dvi_i_properties(struct drm_device *dev) 1704 { 1705 struct drm_property *dvi_i_selector; 1706 struct drm_property *dvi_i_subconnector; 1707 1708 if (dev->mode_config.dvi_i_select_subconnector_property) 1709 return 0; 1710 1711 dvi_i_selector = 1712 drm_property_create_enum(dev, 0, 1713 "select subconnector", 1714 drm_dvi_i_select_enum_list, 1715 ARRAY_SIZE(drm_dvi_i_select_enum_list)); 1716 dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector; 1717 1718 dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1719 "subconnector", 1720 drm_dvi_i_subconnector_enum_list, 1721 ARRAY_SIZE(drm_dvi_i_subconnector_enum_list)); 1722 dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector; 1723 1724 return 0; 1725 } 1726 EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); 1727 1728 /** 1729 * drm_create_tv_properties - create TV specific connector properties 1730 * @dev: DRM device 1731 * @num_modes: number of different TV formats (modes) supported 1732 * @modes: array of pointers to strings containing name of each format 1733 * 1734 * Called by a driver's TV initialization routine, this function creates 1735 * the TV specific connector properties for a given device. Caller is 1736 * responsible for allocating a list of format names and passing them to 1737 * this routine. 1738 */ 1739 int drm_mode_create_tv_properties(struct drm_device *dev, 1740 unsigned int num_modes, 1741 const char * const modes[]) 1742 { 1743 struct drm_property *tv_selector; 1744 struct drm_property *tv_subconnector; 1745 unsigned int i; 1746 1747 if (dev->mode_config.tv_select_subconnector_property) 1748 return 0; 1749 1750 /* 1751 * Basic connector properties 1752 */ 1753 tv_selector = drm_property_create_enum(dev, 0, 1754 "select subconnector", 1755 drm_tv_select_enum_list, 1756 ARRAY_SIZE(drm_tv_select_enum_list)); 1757 if (!tv_selector) 1758 goto nomem; 1759 1760 dev->mode_config.tv_select_subconnector_property = tv_selector; 1761 1762 tv_subconnector = 1763 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1764 "subconnector", 1765 drm_tv_subconnector_enum_list, 1766 ARRAY_SIZE(drm_tv_subconnector_enum_list)); 1767 if (!tv_subconnector) 1768 goto nomem; 1769 dev->mode_config.tv_subconnector_property = tv_subconnector; 1770 1771 /* 1772 * Other, TV specific properties: margins & TV modes. 1773 */ 1774 dev->mode_config.tv_left_margin_property = 1775 drm_property_create_range(dev, 0, "left margin", 0, 100); 1776 if (!dev->mode_config.tv_left_margin_property) 1777 goto nomem; 1778 1779 dev->mode_config.tv_right_margin_property = 1780 drm_property_create_range(dev, 0, "right margin", 0, 100); 1781 if (!dev->mode_config.tv_right_margin_property) 1782 goto nomem; 1783 1784 dev->mode_config.tv_top_margin_property = 1785 drm_property_create_range(dev, 0, "top margin", 0, 100); 1786 if (!dev->mode_config.tv_top_margin_property) 1787 goto nomem; 1788 1789 dev->mode_config.tv_bottom_margin_property = 1790 drm_property_create_range(dev, 0, "bottom margin", 0, 100); 1791 if (!dev->mode_config.tv_bottom_margin_property) 1792 goto nomem; 1793 1794 dev->mode_config.tv_mode_property = 1795 drm_property_create(dev, DRM_MODE_PROP_ENUM, 1796 "mode", num_modes); 1797 if (!dev->mode_config.tv_mode_property) 1798 goto nomem; 1799 1800 for (i = 0; i < num_modes; i++) 1801 drm_property_add_enum(dev->mode_config.tv_mode_property, i, 1802 i, modes[i]); 1803 1804 dev->mode_config.tv_brightness_property = 1805 drm_property_create_range(dev, 0, "brightness", 0, 100); 1806 if (!dev->mode_config.tv_brightness_property) 1807 goto nomem; 1808 1809 dev->mode_config.tv_contrast_property = 1810 drm_property_create_range(dev, 0, "contrast", 0, 100); 1811 if (!dev->mode_config.tv_contrast_property) 1812 goto nomem; 1813 1814 dev->mode_config.tv_flicker_reduction_property = 1815 drm_property_create_range(dev, 0, "flicker reduction", 0, 100); 1816 if (!dev->mode_config.tv_flicker_reduction_property) 1817 goto nomem; 1818 1819 dev->mode_config.tv_overscan_property = 1820 drm_property_create_range(dev, 0, "overscan", 0, 100); 1821 if (!dev->mode_config.tv_overscan_property) 1822 goto nomem; 1823 1824 dev->mode_config.tv_saturation_property = 1825 drm_property_create_range(dev, 0, "saturation", 0, 100); 1826 if (!dev->mode_config.tv_saturation_property) 1827 goto nomem; 1828 1829 dev->mode_config.tv_hue_property = 1830 drm_property_create_range(dev, 0, "hue", 0, 100); 1831 if (!dev->mode_config.tv_hue_property) 1832 goto nomem; 1833 1834 return 0; 1835 nomem: 1836 return -ENOMEM; 1837 } 1838 EXPORT_SYMBOL(drm_mode_create_tv_properties); 1839 1840 /** 1841 * drm_mode_create_scaling_mode_property - create scaling mode property 1842 * @dev: DRM device 1843 * 1844 * Called by a driver the first time it's needed, must be attached to desired 1845 * connectors. 1846 */ 1847 int drm_mode_create_scaling_mode_property(struct drm_device *dev) 1848 { 1849 struct drm_property *scaling_mode; 1850 1851 if (dev->mode_config.scaling_mode_property) 1852 return 0; 1853 1854 scaling_mode = 1855 drm_property_create_enum(dev, 0, "scaling mode", 1856 drm_scaling_mode_enum_list, 1857 ARRAY_SIZE(drm_scaling_mode_enum_list)); 1858 1859 dev->mode_config.scaling_mode_property = scaling_mode; 1860 1861 return 0; 1862 } 1863 EXPORT_SYMBOL(drm_mode_create_scaling_mode_property); 1864 1865 /** 1866 * drm_mode_create_aspect_ratio_property - create aspect ratio property 1867 * @dev: DRM device 1868 * 1869 * Called by a driver the first time it's needed, must be attached to desired 1870 * connectors. 1871 * 1872 * Returns: 1873 * Zero on success, negative errno on failure. 1874 */ 1875 int drm_mode_create_aspect_ratio_property(struct drm_device *dev) 1876 { 1877 if (dev->mode_config.aspect_ratio_property) 1878 return 0; 1879 1880 dev->mode_config.aspect_ratio_property = 1881 drm_property_create_enum(dev, 0, "aspect ratio", 1882 drm_aspect_ratio_enum_list, 1883 ARRAY_SIZE(drm_aspect_ratio_enum_list)); 1884 1885 if (dev->mode_config.aspect_ratio_property == NULL) 1886 return -ENOMEM; 1887 1888 return 0; 1889 } 1890 EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); 1891 1892 /** 1893 * drm_mode_create_dirty_property - create dirty property 1894 * @dev: DRM device 1895 * 1896 * Called by a driver the first time it's needed, must be attached to desired 1897 * connectors. 1898 */ 1899 int drm_mode_create_dirty_info_property(struct drm_device *dev) 1900 { 1901 struct drm_property *dirty_info; 1902 1903 if (dev->mode_config.dirty_info_property) 1904 return 0; 1905 1906 dirty_info = 1907 drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE, 1908 "dirty", 1909 drm_dirty_info_enum_list, 1910 ARRAY_SIZE(drm_dirty_info_enum_list)); 1911 dev->mode_config.dirty_info_property = dirty_info; 1912 1913 return 0; 1914 } 1915 EXPORT_SYMBOL(drm_mode_create_dirty_info_property); 1916 1917 /** 1918 * drm_mode_create_suggested_offset_properties - create suggests offset properties 1919 * @dev: DRM device 1920 * 1921 * Create the the suggested x/y offset property for connectors. 1922 */ 1923 int drm_mode_create_suggested_offset_properties(struct drm_device *dev) 1924 { 1925 if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property) 1926 return 0; 1927 1928 dev->mode_config.suggested_x_property = 1929 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff); 1930 1931 dev->mode_config.suggested_y_property = 1932 drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff); 1933 1934 if (dev->mode_config.suggested_x_property == NULL || 1935 dev->mode_config.suggested_y_property == NULL) 1936 return -ENOMEM; 1937 return 0; 1938 } 1939 EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties); 1940 1941 /** 1942 * drm_mode_getresources - get graphics configuration 1943 * @dev: drm device for the ioctl 1944 * @data: data pointer for the ioctl 1945 * @file_priv: drm file for the ioctl call 1946 * 1947 * Construct a set of configuration description structures and return 1948 * them to the user, including CRTC, connector and framebuffer configuration. 1949 * 1950 * Called by the user via ioctl. 1951 * 1952 * Returns: 1953 * Zero on success, negative errno on failure. 1954 */ 1955 int drm_mode_getresources(struct drm_device *dev, void *data, 1956 struct drm_file *file_priv) 1957 { 1958 struct drm_mode_card_res *card_res = data; 1959 struct list_head *lh; 1960 struct drm_framebuffer *fb; 1961 struct drm_connector *connector; 1962 struct drm_crtc *crtc; 1963 struct drm_encoder *encoder; 1964 int ret = 0; 1965 int connector_count = 0; 1966 int crtc_count = 0; 1967 int fb_count = 0; 1968 int encoder_count = 0; 1969 int copied = 0; 1970 uint32_t __user *fb_id; 1971 uint32_t __user *crtc_id; 1972 uint32_t __user *connector_id; 1973 uint32_t __user *encoder_id; 1974 1975 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1976 return -EINVAL; 1977 1978 1979 mutex_lock(&file_priv->fbs_lock); 1980 /* 1981 * For the non-control nodes we need to limit the list of resources 1982 * by IDs in the group list for this node 1983 */ 1984 list_for_each(lh, &file_priv->fbs) 1985 fb_count++; 1986 1987 /* handle this in 4 parts */ 1988 /* FBs */ 1989 if (card_res->count_fbs >= fb_count) { 1990 copied = 0; 1991 fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr; 1992 list_for_each_entry(fb, &file_priv->fbs, filp_head) { 1993 if (put_user(fb->base.id, fb_id + copied)) { 1994 mutex_unlock(&file_priv->fbs_lock); 1995 return -EFAULT; 1996 } 1997 copied++; 1998 } 1999 } 2000 card_res->count_fbs = fb_count; 2001 mutex_unlock(&file_priv->fbs_lock); 2002 2003 /* mode_config.mutex protects the connector list against e.g. DP MST 2004 * connector hot-adding. CRTC/Plane lists are invariant. */ 2005 mutex_lock(&dev->mode_config.mutex); 2006 drm_for_each_crtc(crtc, dev) 2007 crtc_count++; 2008 2009 drm_for_each_connector(connector, dev) 2010 connector_count++; 2011 2012 drm_for_each_encoder(encoder, dev) 2013 encoder_count++; 2014 2015 card_res->max_height = dev->mode_config.max_height; 2016 card_res->min_height = dev->mode_config.min_height; 2017 card_res->max_width = dev->mode_config.max_width; 2018 card_res->min_width = dev->mode_config.min_width; 2019 2020 /* CRTCs */ 2021 if (card_res->count_crtcs >= crtc_count) { 2022 copied = 0; 2023 crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr; 2024 drm_for_each_crtc(crtc, dev) { 2025 if (put_user(crtc->base.id, crtc_id + copied)) { 2026 ret = -EFAULT; 2027 goto out; 2028 } 2029 copied++; 2030 } 2031 } 2032 card_res->count_crtcs = crtc_count; 2033 2034 /* Encoders */ 2035 if (card_res->count_encoders >= encoder_count) { 2036 copied = 0; 2037 encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr; 2038 drm_for_each_encoder(encoder, dev) { 2039 if (put_user(encoder->base.id, encoder_id + 2040 copied)) { 2041 ret = -EFAULT; 2042 goto out; 2043 } 2044 copied++; 2045 } 2046 } 2047 card_res->count_encoders = encoder_count; 2048 2049 /* Connectors */ 2050 if (card_res->count_connectors >= connector_count) { 2051 copied = 0; 2052 connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr; 2053 drm_for_each_connector(connector, dev) { 2054 if (put_user(connector->base.id, 2055 connector_id + copied)) { 2056 ret = -EFAULT; 2057 goto out; 2058 } 2059 copied++; 2060 } 2061 } 2062 card_res->count_connectors = connector_count; 2063 2064 out: 2065 mutex_unlock(&dev->mode_config.mutex); 2066 return ret; 2067 } 2068 2069 /** 2070 * drm_mode_getcrtc - get CRTC configuration 2071 * @dev: drm device for the ioctl 2072 * @data: data pointer for the ioctl 2073 * @file_priv: drm file for the ioctl call 2074 * 2075 * Construct a CRTC configuration structure to return to the user. 2076 * 2077 * Called by the user via ioctl. 2078 * 2079 * Returns: 2080 * Zero on success, negative errno on failure. 2081 */ 2082 int drm_mode_getcrtc(struct drm_device *dev, 2083 void *data, struct drm_file *file_priv) 2084 { 2085 struct drm_mode_crtc *crtc_resp = data; 2086 struct drm_crtc *crtc; 2087 2088 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2089 return -EINVAL; 2090 2091 crtc = drm_crtc_find(dev, crtc_resp->crtc_id); 2092 if (!crtc) 2093 return -ENOENT; 2094 2095 drm_modeset_lock_crtc(crtc, crtc->primary); 2096 crtc_resp->gamma_size = crtc->gamma_size; 2097 if (crtc->primary->fb) 2098 crtc_resp->fb_id = crtc->primary->fb->base.id; 2099 else 2100 crtc_resp->fb_id = 0; 2101 2102 if (crtc->state) { 2103 crtc_resp->x = crtc->primary->state->src_x >> 16; 2104 crtc_resp->y = crtc->primary->state->src_y >> 16; 2105 if (crtc->state->enable) { 2106 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode); 2107 crtc_resp->mode_valid = 1; 2108 2109 } else { 2110 crtc_resp->mode_valid = 0; 2111 } 2112 } else { 2113 crtc_resp->x = crtc->x; 2114 crtc_resp->y = crtc->y; 2115 if (crtc->enabled) { 2116 drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode); 2117 crtc_resp->mode_valid = 1; 2118 2119 } else { 2120 crtc_resp->mode_valid = 0; 2121 } 2122 } 2123 drm_modeset_unlock_crtc(crtc); 2124 2125 return 0; 2126 } 2127 2128 static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode, 2129 const struct drm_file *file_priv) 2130 { 2131 /* 2132 * If user-space hasn't configured the driver to expose the stereo 3D 2133 * modes, don't expose them. 2134 */ 2135 if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode)) 2136 return false; 2137 2138 return true; 2139 } 2140 2141 static struct drm_encoder *drm_connector_get_encoder(struct drm_connector *connector) 2142 { 2143 /* For atomic drivers only state objects are synchronously updated and 2144 * protected by modeset locks, so check those first. */ 2145 if (connector->state) 2146 return connector->state->best_encoder; 2147 return connector->encoder; 2148 } 2149 2150 /* helper for getconnector and getproperties ioctls */ 2151 static int get_properties(struct drm_mode_object *obj, bool atomic, 2152 uint32_t __user *prop_ptr, uint64_t __user *prop_values, 2153 uint32_t *arg_count_props) 2154 { 2155 int props_count; 2156 int i, ret, copied; 2157 2158 props_count = obj->properties->count; 2159 if (!atomic) 2160 props_count -= obj->properties->atomic_count; 2161 2162 if ((*arg_count_props >= props_count) && props_count) { 2163 for (i = 0, copied = 0; copied < props_count; i++) { 2164 struct drm_property *prop = obj->properties->properties[i]; 2165 uint64_t val; 2166 2167 if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic) 2168 continue; 2169 2170 ret = drm_object_property_get_value(obj, prop, &val); 2171 if (ret) 2172 return ret; 2173 2174 if (put_user(prop->base.id, prop_ptr + copied)) 2175 return -EFAULT; 2176 2177 if (put_user(val, prop_values + copied)) 2178 return -EFAULT; 2179 2180 copied++; 2181 } 2182 } 2183 *arg_count_props = props_count; 2184 2185 return 0; 2186 } 2187 2188 /** 2189 * drm_mode_getconnector - get connector configuration 2190 * @dev: drm device for the ioctl 2191 * @data: data pointer for the ioctl 2192 * @file_priv: drm file for the ioctl call 2193 * 2194 * Construct a connector configuration structure to return to the user. 2195 * 2196 * Called by the user via ioctl. 2197 * 2198 * Returns: 2199 * Zero on success, negative errno on failure. 2200 */ 2201 int drm_mode_getconnector(struct drm_device *dev, void *data, 2202 struct drm_file *file_priv) 2203 { 2204 struct drm_mode_get_connector *out_resp = data; 2205 struct drm_connector *connector; 2206 struct drm_encoder *encoder; 2207 struct drm_display_mode *mode; 2208 int mode_count = 0; 2209 int encoders_count = 0; 2210 int ret = 0; 2211 int copied = 0; 2212 int i; 2213 struct drm_mode_modeinfo u_mode; 2214 struct drm_mode_modeinfo __user *mode_ptr; 2215 uint32_t __user *encoder_ptr; 2216 2217 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2218 return -EINVAL; 2219 2220 memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo)); 2221 2222 mutex_lock(&dev->mode_config.mutex); 2223 2224 connector = drm_connector_lookup(dev, out_resp->connector_id); 2225 if (!connector) { 2226 ret = -ENOENT; 2227 goto out_unlock; 2228 } 2229 2230 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) 2231 if (connector->encoder_ids[i] != 0) 2232 encoders_count++; 2233 2234 if (out_resp->count_modes == 0) { 2235 connector->funcs->fill_modes(connector, 2236 dev->mode_config.max_width, 2237 dev->mode_config.max_height); 2238 } 2239 2240 /* delayed so we get modes regardless of pre-fill_modes state */ 2241 list_for_each_entry(mode, &connector->modes, head) 2242 if (drm_mode_expose_to_userspace(mode, file_priv)) 2243 mode_count++; 2244 2245 out_resp->connector_id = connector->base.id; 2246 out_resp->connector_type = connector->connector_type; 2247 out_resp->connector_type_id = connector->connector_type_id; 2248 out_resp->mm_width = connector->display_info.width_mm; 2249 out_resp->mm_height = connector->display_info.height_mm; 2250 out_resp->subpixel = connector->display_info.subpixel_order; 2251 out_resp->connection = connector->status; 2252 2253 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2254 encoder = drm_connector_get_encoder(connector); 2255 if (encoder) 2256 out_resp->encoder_id = encoder->base.id; 2257 else 2258 out_resp->encoder_id = 0; 2259 2260 /* 2261 * This ioctl is called twice, once to determine how much space is 2262 * needed, and the 2nd time to fill it. 2263 */ 2264 if ((out_resp->count_modes >= mode_count) && mode_count) { 2265 copied = 0; 2266 mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr; 2267 list_for_each_entry(mode, &connector->modes, head) { 2268 if (!drm_mode_expose_to_userspace(mode, file_priv)) 2269 continue; 2270 2271 drm_mode_convert_to_umode(&u_mode, mode); 2272 if (copy_to_user(mode_ptr + copied, 2273 &u_mode, sizeof(u_mode))) { 2274 ret = -EFAULT; 2275 goto out; 2276 } 2277 copied++; 2278 } 2279 } 2280 out_resp->count_modes = mode_count; 2281 2282 ret = get_properties(&connector->base, file_priv->atomic, 2283 (uint32_t __user *)(unsigned long)(out_resp->props_ptr), 2284 (uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr), 2285 &out_resp->count_props); 2286 if (ret) 2287 goto out; 2288 2289 if ((out_resp->count_encoders >= encoders_count) && encoders_count) { 2290 copied = 0; 2291 encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr); 2292 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 2293 if (connector->encoder_ids[i] != 0) { 2294 if (put_user(connector->encoder_ids[i], 2295 encoder_ptr + copied)) { 2296 ret = -EFAULT; 2297 goto out; 2298 } 2299 copied++; 2300 } 2301 } 2302 } 2303 out_resp->count_encoders = encoders_count; 2304 2305 out: 2306 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2307 2308 drm_connector_unreference(connector); 2309 out_unlock: 2310 mutex_unlock(&dev->mode_config.mutex); 2311 2312 return ret; 2313 } 2314 2315 static struct drm_crtc *drm_encoder_get_crtc(struct drm_encoder *encoder) 2316 { 2317 struct drm_connector *connector; 2318 struct drm_device *dev = encoder->dev; 2319 bool uses_atomic = false; 2320 2321 /* For atomic drivers only state objects are synchronously updated and 2322 * protected by modeset locks, so check those first. */ 2323 drm_for_each_connector(connector, dev) { 2324 if (!connector->state) 2325 continue; 2326 2327 uses_atomic = true; 2328 2329 if (connector->state->best_encoder != encoder) 2330 continue; 2331 2332 return connector->state->crtc; 2333 } 2334 2335 /* Don't return stale data (e.g. pending async disable). */ 2336 if (uses_atomic) 2337 return NULL; 2338 2339 return encoder->crtc; 2340 } 2341 2342 /** 2343 * drm_mode_getencoder - get encoder configuration 2344 * @dev: drm device for the ioctl 2345 * @data: data pointer for the ioctl 2346 * @file_priv: drm file for the ioctl call 2347 * 2348 * Construct a encoder configuration structure to return to the user. 2349 * 2350 * Called by the user via ioctl. 2351 * 2352 * Returns: 2353 * Zero on success, negative errno on failure. 2354 */ 2355 int drm_mode_getencoder(struct drm_device *dev, void *data, 2356 struct drm_file *file_priv) 2357 { 2358 struct drm_mode_get_encoder *enc_resp = data; 2359 struct drm_encoder *encoder; 2360 struct drm_crtc *crtc; 2361 2362 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2363 return -EINVAL; 2364 2365 encoder = drm_encoder_find(dev, enc_resp->encoder_id); 2366 if (!encoder) 2367 return -ENOENT; 2368 2369 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); 2370 crtc = drm_encoder_get_crtc(encoder); 2371 if (crtc) 2372 enc_resp->crtc_id = crtc->base.id; 2373 else 2374 enc_resp->crtc_id = 0; 2375 drm_modeset_unlock(&dev->mode_config.connection_mutex); 2376 2377 enc_resp->encoder_type = encoder->encoder_type; 2378 enc_resp->encoder_id = encoder->base.id; 2379 enc_resp->possible_crtcs = encoder->possible_crtcs; 2380 enc_resp->possible_clones = encoder->possible_clones; 2381 2382 return 0; 2383 } 2384 2385 /** 2386 * drm_mode_getplane_res - enumerate all plane resources 2387 * @dev: DRM device 2388 * @data: ioctl data 2389 * @file_priv: DRM file info 2390 * 2391 * Construct a list of plane ids to return to the user. 2392 * 2393 * Called by the user via ioctl. 2394 * 2395 * Returns: 2396 * Zero on success, negative errno on failure. 2397 */ 2398 int drm_mode_getplane_res(struct drm_device *dev, void *data, 2399 struct drm_file *file_priv) 2400 { 2401 struct drm_mode_get_plane_res *plane_resp = data; 2402 struct drm_mode_config *config; 2403 struct drm_plane *plane; 2404 uint32_t __user *plane_ptr; 2405 int copied = 0; 2406 unsigned num_planes; 2407 2408 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2409 return -EINVAL; 2410 2411 config = &dev->mode_config; 2412 2413 if (file_priv->universal_planes) 2414 num_planes = config->num_total_plane; 2415 else 2416 num_planes = config->num_overlay_plane; 2417 2418 /* 2419 * This ioctl is called twice, once to determine how much space is 2420 * needed, and the 2nd time to fill it. 2421 */ 2422 if (num_planes && 2423 (plane_resp->count_planes >= num_planes)) { 2424 plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr; 2425 2426 /* Plane lists are invariant, no locking needed. */ 2427 drm_for_each_plane(plane, dev) { 2428 /* 2429 * Unless userspace set the 'universal planes' 2430 * capability bit, only advertise overlays. 2431 */ 2432 if (plane->type != DRM_PLANE_TYPE_OVERLAY && 2433 !file_priv->universal_planes) 2434 continue; 2435 2436 if (put_user(plane->base.id, plane_ptr + copied)) 2437 return -EFAULT; 2438 copied++; 2439 } 2440 } 2441 plane_resp->count_planes = num_planes; 2442 2443 return 0; 2444 } 2445 2446 /** 2447 * drm_mode_getplane - get plane configuration 2448 * @dev: DRM device 2449 * @data: ioctl data 2450 * @file_priv: DRM file info 2451 * 2452 * Construct a plane configuration structure to return to the user. 2453 * 2454 * Called by the user via ioctl. 2455 * 2456 * Returns: 2457 * Zero on success, negative errno on failure. 2458 */ 2459 int drm_mode_getplane(struct drm_device *dev, void *data, 2460 struct drm_file *file_priv) 2461 { 2462 struct drm_mode_get_plane *plane_resp = data; 2463 struct drm_plane *plane; 2464 uint32_t __user *format_ptr; 2465 2466 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2467 return -EINVAL; 2468 2469 plane = drm_plane_find(dev, plane_resp->plane_id); 2470 if (!plane) 2471 return -ENOENT; 2472 2473 drm_modeset_lock(&plane->mutex, NULL); 2474 if (plane->crtc) 2475 plane_resp->crtc_id = plane->crtc->base.id; 2476 else 2477 plane_resp->crtc_id = 0; 2478 2479 if (plane->fb) 2480 plane_resp->fb_id = plane->fb->base.id; 2481 else 2482 plane_resp->fb_id = 0; 2483 drm_modeset_unlock(&plane->mutex); 2484 2485 plane_resp->plane_id = plane->base.id; 2486 plane_resp->possible_crtcs = plane->possible_crtcs; 2487 plane_resp->gamma_size = 0; 2488 2489 /* 2490 * This ioctl is called twice, once to determine how much space is 2491 * needed, and the 2nd time to fill it. 2492 */ 2493 if (plane->format_count && 2494 (plane_resp->count_format_types >= plane->format_count)) { 2495 format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr; 2496 if (copy_to_user(format_ptr, 2497 plane->format_types, 2498 sizeof(uint32_t) * plane->format_count)) { 2499 return -EFAULT; 2500 } 2501 } 2502 plane_resp->count_format_types = plane->format_count; 2503 2504 return 0; 2505 } 2506 2507 /** 2508 * drm_plane_check_pixel_format - Check if the plane supports the pixel format 2509 * @plane: plane to check for format support 2510 * @format: the pixel format 2511 * 2512 * Returns: 2513 * Zero of @plane has @format in its list of supported pixel formats, -EINVAL 2514 * otherwise. 2515 */ 2516 int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format) 2517 { 2518 unsigned int i; 2519 2520 for (i = 0; i < plane->format_count; i++) { 2521 if (format == plane->format_types[i]) 2522 return 0; 2523 } 2524 2525 return -EINVAL; 2526 } 2527 2528 static int check_src_coords(uint32_t src_x, uint32_t src_y, 2529 uint32_t src_w, uint32_t src_h, 2530 const struct drm_framebuffer *fb) 2531 { 2532 unsigned int fb_width, fb_height; 2533 2534 fb_width = fb->width << 16; 2535 fb_height = fb->height << 16; 2536 2537 /* Make sure source coordinates are inside the fb. */ 2538 if (src_w > fb_width || 2539 src_x > fb_width - src_w || 2540 src_h > fb_height || 2541 src_y > fb_height - src_h) { 2542 DRM_DEBUG_KMS("Invalid source coordinates " 2543 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n", 2544 src_w >> 16, ((src_w & 0xffff) * 15625) >> 10, 2545 src_h >> 16, ((src_h & 0xffff) * 15625) >> 10, 2546 src_x >> 16, ((src_x & 0xffff) * 15625) >> 10, 2547 src_y >> 16, ((src_y & 0xffff) * 15625) >> 10); 2548 return -ENOSPC; 2549 } 2550 2551 return 0; 2552 } 2553 2554 /* 2555 * setplane_internal - setplane handler for internal callers 2556 * 2557 * Note that we assume an extra reference has already been taken on fb. If the 2558 * update fails, this reference will be dropped before return; if it succeeds, 2559 * the previous framebuffer (if any) will be unreferenced instead. 2560 * 2561 * src_{x,y,w,h} are provided in 16.16 fixed point format 2562 */ 2563 static int __setplane_internal(struct drm_plane *plane, 2564 struct drm_crtc *crtc, 2565 struct drm_framebuffer *fb, 2566 int32_t crtc_x, int32_t crtc_y, 2567 uint32_t crtc_w, uint32_t crtc_h, 2568 /* src_{x,y,w,h} values are 16.16 fixed point */ 2569 uint32_t src_x, uint32_t src_y, 2570 uint32_t src_w, uint32_t src_h) 2571 { 2572 int ret = 0; 2573 2574 /* No fb means shut it down */ 2575 if (!fb) { 2576 plane->old_fb = plane->fb; 2577 ret = plane->funcs->disable_plane(plane); 2578 if (!ret) { 2579 plane->crtc = NULL; 2580 plane->fb = NULL; 2581 } else { 2582 plane->old_fb = NULL; 2583 } 2584 goto out; 2585 } 2586 2587 /* Check whether this plane is usable on this CRTC */ 2588 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { 2589 DRM_DEBUG_KMS("Invalid crtc for plane\n"); 2590 ret = -EINVAL; 2591 goto out; 2592 } 2593 2594 /* Check whether this plane supports the fb pixel format. */ 2595 ret = drm_plane_check_pixel_format(plane, fb->pixel_format); 2596 if (ret) { 2597 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2598 drm_get_format_name(fb->pixel_format)); 2599 goto out; 2600 } 2601 2602 /* Give drivers some help against integer overflows */ 2603 if (crtc_w > INT_MAX || 2604 crtc_x > INT_MAX - (int32_t) crtc_w || 2605 crtc_h > INT_MAX || 2606 crtc_y > INT_MAX - (int32_t) crtc_h) { 2607 DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n", 2608 crtc_w, crtc_h, crtc_x, crtc_y); 2609 ret = -ERANGE; 2610 goto out; 2611 } 2612 2613 ret = check_src_coords(src_x, src_y, src_w, src_h, fb); 2614 if (ret) 2615 goto out; 2616 2617 plane->old_fb = plane->fb; 2618 ret = plane->funcs->update_plane(plane, crtc, fb, 2619 crtc_x, crtc_y, crtc_w, crtc_h, 2620 src_x, src_y, src_w, src_h); 2621 if (!ret) { 2622 plane->crtc = crtc; 2623 plane->fb = fb; 2624 fb = NULL; 2625 } else { 2626 plane->old_fb = NULL; 2627 } 2628 2629 out: 2630 if (fb) 2631 drm_framebuffer_unreference(fb); 2632 if (plane->old_fb) 2633 drm_framebuffer_unreference(plane->old_fb); 2634 plane->old_fb = NULL; 2635 2636 return ret; 2637 } 2638 2639 static int setplane_internal(struct drm_plane *plane, 2640 struct drm_crtc *crtc, 2641 struct drm_framebuffer *fb, 2642 int32_t crtc_x, int32_t crtc_y, 2643 uint32_t crtc_w, uint32_t crtc_h, 2644 /* src_{x,y,w,h} values are 16.16 fixed point */ 2645 uint32_t src_x, uint32_t src_y, 2646 uint32_t src_w, uint32_t src_h) 2647 { 2648 int ret; 2649 2650 drm_modeset_lock_all(plane->dev); 2651 ret = __setplane_internal(plane, crtc, fb, 2652 crtc_x, crtc_y, crtc_w, crtc_h, 2653 src_x, src_y, src_w, src_h); 2654 drm_modeset_unlock_all(plane->dev); 2655 2656 return ret; 2657 } 2658 2659 /** 2660 * drm_mode_setplane - configure a plane's configuration 2661 * @dev: DRM device 2662 * @data: ioctl data* 2663 * @file_priv: DRM file info 2664 * 2665 * Set plane configuration, including placement, fb, scaling, and other factors. 2666 * Or pass a NULL fb to disable (planes may be disabled without providing a 2667 * valid crtc). 2668 * 2669 * Returns: 2670 * Zero on success, negative errno on failure. 2671 */ 2672 int drm_mode_setplane(struct drm_device *dev, void *data, 2673 struct drm_file *file_priv) 2674 { 2675 struct drm_mode_set_plane *plane_req = data; 2676 struct drm_plane *plane; 2677 struct drm_crtc *crtc = NULL; 2678 struct drm_framebuffer *fb = NULL; 2679 2680 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2681 return -EINVAL; 2682 2683 /* 2684 * First, find the plane, crtc, and fb objects. If not available, 2685 * we don't bother to call the driver. 2686 */ 2687 plane = drm_plane_find(dev, plane_req->plane_id); 2688 if (!plane) { 2689 DRM_DEBUG_KMS("Unknown plane ID %d\n", 2690 plane_req->plane_id); 2691 return -ENOENT; 2692 } 2693 2694 if (plane_req->fb_id) { 2695 fb = drm_framebuffer_lookup(dev, plane_req->fb_id); 2696 if (!fb) { 2697 DRM_DEBUG_KMS("Unknown framebuffer ID %d\n", 2698 plane_req->fb_id); 2699 return -ENOENT; 2700 } 2701 2702 crtc = drm_crtc_find(dev, plane_req->crtc_id); 2703 if (!crtc) { 2704 DRM_DEBUG_KMS("Unknown crtc ID %d\n", 2705 plane_req->crtc_id); 2706 return -ENOENT; 2707 } 2708 } 2709 2710 /* 2711 * setplane_internal will take care of deref'ing either the old or new 2712 * framebuffer depending on success. 2713 */ 2714 return setplane_internal(plane, crtc, fb, 2715 plane_req->crtc_x, plane_req->crtc_y, 2716 plane_req->crtc_w, plane_req->crtc_h, 2717 plane_req->src_x, plane_req->src_y, 2718 plane_req->src_w, plane_req->src_h); 2719 } 2720 2721 /** 2722 * drm_mode_set_config_internal - helper to call ->set_config 2723 * @set: modeset config to set 2724 * 2725 * This is a little helper to wrap internal calls to the ->set_config driver 2726 * interface. The only thing it adds is correct refcounting dance. 2727 * 2728 * Returns: 2729 * Zero on success, negative errno on failure. 2730 */ 2731 int drm_mode_set_config_internal(struct drm_mode_set *set) 2732 { 2733 struct drm_crtc *crtc = set->crtc; 2734 struct drm_framebuffer *fb; 2735 struct drm_crtc *tmp; 2736 int ret; 2737 2738 /* 2739 * NOTE: ->set_config can also disable other crtcs (if we steal all 2740 * connectors from it), hence we need to refcount the fbs across all 2741 * crtcs. Atomic modeset will have saner semantics ... 2742 */ 2743 drm_for_each_crtc(tmp, crtc->dev) 2744 tmp->primary->old_fb = tmp->primary->fb; 2745 2746 fb = set->fb; 2747 2748 ret = crtc->funcs->set_config(set); 2749 if (ret == 0) { 2750 crtc->primary->crtc = crtc; 2751 crtc->primary->fb = fb; 2752 } 2753 2754 drm_for_each_crtc(tmp, crtc->dev) { 2755 if (tmp->primary->fb) 2756 drm_framebuffer_reference(tmp->primary->fb); 2757 if (tmp->primary->old_fb) 2758 drm_framebuffer_unreference(tmp->primary->old_fb); 2759 tmp->primary->old_fb = NULL; 2760 } 2761 2762 return ret; 2763 } 2764 EXPORT_SYMBOL(drm_mode_set_config_internal); 2765 2766 /** 2767 * drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode 2768 * @mode: mode to query 2769 * @hdisplay: hdisplay value to fill in 2770 * @vdisplay: vdisplay value to fill in 2771 * 2772 * The vdisplay value will be doubled if the specified mode is a stereo mode of 2773 * the appropriate layout. 2774 */ 2775 void drm_crtc_get_hv_timing(const struct drm_display_mode *mode, 2776 int *hdisplay, int *vdisplay) 2777 { 2778 struct drm_display_mode adjusted; 2779 2780 drm_mode_copy(&adjusted, mode); 2781 drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY); 2782 *hdisplay = adjusted.crtc_hdisplay; 2783 *vdisplay = adjusted.crtc_vdisplay; 2784 } 2785 EXPORT_SYMBOL(drm_crtc_get_hv_timing); 2786 2787 /** 2788 * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the 2789 * CRTC viewport 2790 * @crtc: CRTC that framebuffer will be displayed on 2791 * @x: x panning 2792 * @y: y panning 2793 * @mode: mode that framebuffer will be displayed under 2794 * @fb: framebuffer to check size of 2795 */ 2796 int drm_crtc_check_viewport(const struct drm_crtc *crtc, 2797 int x, int y, 2798 const struct drm_display_mode *mode, 2799 const struct drm_framebuffer *fb) 2800 2801 { 2802 int hdisplay, vdisplay; 2803 2804 drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay); 2805 2806 if (crtc->state && 2807 crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) | 2808 BIT(DRM_ROTATE_270))) 2809 swap(hdisplay, vdisplay); 2810 2811 return check_src_coords(x << 16, y << 16, 2812 hdisplay << 16, vdisplay << 16, fb); 2813 } 2814 EXPORT_SYMBOL(drm_crtc_check_viewport); 2815 2816 /** 2817 * drm_mode_setcrtc - set CRTC configuration 2818 * @dev: drm device for the ioctl 2819 * @data: data pointer for the ioctl 2820 * @file_priv: drm file for the ioctl call 2821 * 2822 * Build a new CRTC configuration based on user request. 2823 * 2824 * Called by the user via ioctl. 2825 * 2826 * Returns: 2827 * Zero on success, negative errno on failure. 2828 */ 2829 int drm_mode_setcrtc(struct drm_device *dev, void *data, 2830 struct drm_file *file_priv) 2831 { 2832 struct drm_mode_config *config = &dev->mode_config; 2833 struct drm_mode_crtc *crtc_req = data; 2834 struct drm_crtc *crtc; 2835 struct drm_connector **connector_set = NULL, *connector; 2836 struct drm_framebuffer *fb = NULL; 2837 struct drm_display_mode *mode = NULL; 2838 struct drm_mode_set set; 2839 uint32_t __user *set_connectors_ptr; 2840 int ret; 2841 int i; 2842 2843 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 2844 return -EINVAL; 2845 2846 /* 2847 * Universal plane src offsets are only 16.16, prevent havoc for 2848 * drivers using universal plane code internally. 2849 */ 2850 if (crtc_req->x & 0xffff0000 || crtc_req->y & 0xffff0000) 2851 return -ERANGE; 2852 2853 drm_modeset_lock_all(dev); 2854 crtc = drm_crtc_find(dev, crtc_req->crtc_id); 2855 if (!crtc) { 2856 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id); 2857 ret = -ENOENT; 2858 goto out; 2859 } 2860 DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name); 2861 2862 if (crtc_req->mode_valid) { 2863 /* If we have a mode we need a framebuffer. */ 2864 /* If we pass -1, set the mode with the currently bound fb */ 2865 if (crtc_req->fb_id == -1) { 2866 if (!crtc->primary->fb) { 2867 DRM_DEBUG_KMS("CRTC doesn't have current FB\n"); 2868 ret = -EINVAL; 2869 goto out; 2870 } 2871 fb = crtc->primary->fb; 2872 /* Make refcounting symmetric with the lookup path. */ 2873 drm_framebuffer_reference(fb); 2874 } else { 2875 fb = drm_framebuffer_lookup(dev, crtc_req->fb_id); 2876 if (!fb) { 2877 DRM_DEBUG_KMS("Unknown FB ID%d\n", 2878 crtc_req->fb_id); 2879 ret = -ENOENT; 2880 goto out; 2881 } 2882 } 2883 2884 mode = drm_mode_create(dev); 2885 if (!mode) { 2886 ret = -ENOMEM; 2887 goto out; 2888 } 2889 2890 ret = drm_mode_convert_umode(mode, &crtc_req->mode); 2891 if (ret) { 2892 DRM_DEBUG_KMS("Invalid mode\n"); 2893 goto out; 2894 } 2895 2896 /* 2897 * Check whether the primary plane supports the fb pixel format. 2898 * Drivers not implementing the universal planes API use a 2899 * default formats list provided by the DRM core which doesn't 2900 * match real hardware capabilities. Skip the check in that 2901 * case. 2902 */ 2903 if (!crtc->primary->format_default) { 2904 ret = drm_plane_check_pixel_format(crtc->primary, 2905 fb->pixel_format); 2906 if (ret) { 2907 DRM_DEBUG_KMS("Invalid pixel format %s\n", 2908 drm_get_format_name(fb->pixel_format)); 2909 goto out; 2910 } 2911 } 2912 2913 ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y, 2914 mode, fb); 2915 if (ret) 2916 goto out; 2917 2918 } 2919 2920 if (crtc_req->count_connectors == 0 && mode) { 2921 DRM_DEBUG_KMS("Count connectors is 0 but mode set\n"); 2922 ret = -EINVAL; 2923 goto out; 2924 } 2925 2926 if (crtc_req->count_connectors > 0 && (!mode || !fb)) { 2927 DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n", 2928 crtc_req->count_connectors); 2929 ret = -EINVAL; 2930 goto out; 2931 } 2932 2933 if (crtc_req->count_connectors > 0) { 2934 u32 out_id; 2935 2936 /* Avoid unbounded kernel memory allocation */ 2937 if (crtc_req->count_connectors > config->num_connector) { 2938 ret = -EINVAL; 2939 goto out; 2940 } 2941 2942 connector_set = kmalloc_array(crtc_req->count_connectors, 2943 sizeof(struct drm_connector *), 2944 GFP_KERNEL); 2945 if (!connector_set) { 2946 ret = -ENOMEM; 2947 goto out; 2948 } 2949 2950 for (i = 0; i < crtc_req->count_connectors; i++) { 2951 connector_set[i] = NULL; 2952 set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr; 2953 if (get_user(out_id, &set_connectors_ptr[i])) { 2954 ret = -EFAULT; 2955 goto out; 2956 } 2957 2958 connector = drm_connector_lookup(dev, out_id); 2959 if (!connector) { 2960 DRM_DEBUG_KMS("Connector id %d unknown\n", 2961 out_id); 2962 ret = -ENOENT; 2963 goto out; 2964 } 2965 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", 2966 connector->base.id, 2967 connector->name); 2968 2969 connector_set[i] = connector; 2970 } 2971 } 2972 2973 set.crtc = crtc; 2974 set.x = crtc_req->x; 2975 set.y = crtc_req->y; 2976 set.mode = mode; 2977 set.connectors = connector_set; 2978 set.num_connectors = crtc_req->count_connectors; 2979 set.fb = fb; 2980 ret = drm_mode_set_config_internal(&set); 2981 2982 out: 2983 if (fb) 2984 drm_framebuffer_unreference(fb); 2985 2986 if (connector_set) { 2987 for (i = 0; i < crtc_req->count_connectors; i++) { 2988 if (connector_set[i]) 2989 drm_connector_unreference(connector_set[i]); 2990 } 2991 } 2992 kfree(connector_set); 2993 drm_mode_destroy(dev, mode); 2994 drm_modeset_unlock_all(dev); 2995 return ret; 2996 } 2997 2998 /** 2999 * drm_mode_cursor_universal - translate legacy cursor ioctl call into a 3000 * universal plane handler call 3001 * @crtc: crtc to update cursor for 3002 * @req: data pointer for the ioctl 3003 * @file_priv: drm file for the ioctl call 3004 * 3005 * Legacy cursor ioctl's work directly with driver buffer handles. To 3006 * translate legacy ioctl calls into universal plane handler calls, we need to 3007 * wrap the native buffer handle in a drm_framebuffer. 3008 * 3009 * Note that we assume any handle passed to the legacy ioctls was a 32-bit ARGB 3010 * buffer with a pitch of 4*width; the universal plane interface should be used 3011 * directly in cases where the hardware can support other buffer settings and 3012 * userspace wants to make use of these capabilities. 3013 * 3014 * Returns: 3015 * Zero on success, negative errno on failure. 3016 */ 3017 static int drm_mode_cursor_universal(struct drm_crtc *crtc, 3018 struct drm_mode_cursor2 *req, 3019 struct drm_file *file_priv) 3020 { 3021 struct drm_device *dev = crtc->dev; 3022 struct drm_framebuffer *fb = NULL; 3023 struct drm_mode_fb_cmd2 fbreq = { 3024 .width = req->width, 3025 .height = req->height, 3026 .pixel_format = DRM_FORMAT_ARGB8888, 3027 .pitches = { req->width * 4 }, 3028 .handles = { req->handle }, 3029 }; 3030 int32_t crtc_x, crtc_y; 3031 uint32_t crtc_w = 0, crtc_h = 0; 3032 uint32_t src_w = 0, src_h = 0; 3033 int ret = 0; 3034 3035 BUG_ON(!crtc->cursor); 3036 WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL); 3037 3038 /* 3039 * Obtain fb we'll be using (either new or existing) and take an extra 3040 * reference to it if fb != null. setplane will take care of dropping 3041 * the reference if the plane update fails. 3042 */ 3043 if (req->flags & DRM_MODE_CURSOR_BO) { 3044 if (req->handle) { 3045 fb = internal_framebuffer_create(dev, &fbreq, file_priv); 3046 if (IS_ERR(fb)) { 3047 DRM_DEBUG_KMS("failed to wrap cursor buffer in drm framebuffer\n"); 3048 return PTR_ERR(fb); 3049 } 3050 fb->hot_x = req->hot_x; 3051 fb->hot_y = req->hot_y; 3052 } else { 3053 fb = NULL; 3054 } 3055 } else { 3056 fb = crtc->cursor->fb; 3057 if (fb) 3058 drm_framebuffer_reference(fb); 3059 } 3060 3061 if (req->flags & DRM_MODE_CURSOR_MOVE) { 3062 crtc_x = req->x; 3063 crtc_y = req->y; 3064 } else { 3065 crtc_x = crtc->cursor_x; 3066 crtc_y = crtc->cursor_y; 3067 } 3068 3069 if (fb) { 3070 crtc_w = fb->width; 3071 crtc_h = fb->height; 3072 src_w = fb->width << 16; 3073 src_h = fb->height << 16; 3074 } 3075 3076 /* 3077 * setplane_internal will take care of deref'ing either the old or new 3078 * framebuffer depending on success. 3079 */ 3080 ret = __setplane_internal(crtc->cursor, crtc, fb, 3081 crtc_x, crtc_y, crtc_w, crtc_h, 3082 0, 0, src_w, src_h); 3083 3084 /* Update successful; save new cursor position, if necessary */ 3085 if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) { 3086 crtc->cursor_x = req->x; 3087 crtc->cursor_y = req->y; 3088 } 3089 3090 return ret; 3091 } 3092 3093 static int drm_mode_cursor_common(struct drm_device *dev, 3094 struct drm_mode_cursor2 *req, 3095 struct drm_file *file_priv) 3096 { 3097 struct drm_crtc *crtc; 3098 int ret = 0; 3099 3100 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3101 return -EINVAL; 3102 3103 if (!req->flags || (~DRM_MODE_CURSOR_FLAGS & req->flags)) 3104 return -EINVAL; 3105 3106 crtc = drm_crtc_find(dev, req->crtc_id); 3107 if (!crtc) { 3108 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id); 3109 return -ENOENT; 3110 } 3111 3112 /* 3113 * If this crtc has a universal cursor plane, call that plane's update 3114 * handler rather than using legacy cursor handlers. 3115 */ 3116 drm_modeset_lock_crtc(crtc, crtc->cursor); 3117 if (crtc->cursor) { 3118 ret = drm_mode_cursor_universal(crtc, req, file_priv); 3119 goto out; 3120 } 3121 3122 if (req->flags & DRM_MODE_CURSOR_BO) { 3123 if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) { 3124 ret = -ENXIO; 3125 goto out; 3126 } 3127 /* Turns off the cursor if handle is 0 */ 3128 if (crtc->funcs->cursor_set2) 3129 ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle, 3130 req->width, req->height, req->hot_x, req->hot_y); 3131 else 3132 ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle, 3133 req->width, req->height); 3134 } 3135 3136 if (req->flags & DRM_MODE_CURSOR_MOVE) { 3137 if (crtc->funcs->cursor_move) { 3138 ret = crtc->funcs->cursor_move(crtc, req->x, req->y); 3139 } else { 3140 ret = -EFAULT; 3141 goto out; 3142 } 3143 } 3144 out: 3145 drm_modeset_unlock_crtc(crtc); 3146 3147 return ret; 3148 3149 } 3150 3151 3152 /** 3153 * drm_mode_cursor_ioctl - set CRTC's cursor configuration 3154 * @dev: drm device for the ioctl 3155 * @data: data pointer for the ioctl 3156 * @file_priv: drm file for the ioctl call 3157 * 3158 * Set the cursor configuration based on user request. 3159 * 3160 * Called by the user via ioctl. 3161 * 3162 * Returns: 3163 * Zero on success, negative errno on failure. 3164 */ 3165 int drm_mode_cursor_ioctl(struct drm_device *dev, 3166 void *data, struct drm_file *file_priv) 3167 { 3168 struct drm_mode_cursor *req = data; 3169 struct drm_mode_cursor2 new_req; 3170 3171 memcpy(&new_req, req, sizeof(struct drm_mode_cursor)); 3172 new_req.hot_x = new_req.hot_y = 0; 3173 3174 return drm_mode_cursor_common(dev, &new_req, file_priv); 3175 } 3176 3177 /** 3178 * drm_mode_cursor2_ioctl - set CRTC's cursor configuration 3179 * @dev: drm device for the ioctl 3180 * @data: data pointer for the ioctl 3181 * @file_priv: drm file for the ioctl call 3182 * 3183 * Set the cursor configuration based on user request. This implements the 2nd 3184 * version of the cursor ioctl, which allows userspace to additionally specify 3185 * the hotspot of the pointer. 3186 * 3187 * Called by the user via ioctl. 3188 * 3189 * Returns: 3190 * Zero on success, negative errno on failure. 3191 */ 3192 int drm_mode_cursor2_ioctl(struct drm_device *dev, 3193 void *data, struct drm_file *file_priv) 3194 { 3195 struct drm_mode_cursor2 *req = data; 3196 3197 return drm_mode_cursor_common(dev, req, file_priv); 3198 } 3199 3200 /** 3201 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 3202 * @bpp: bits per pixels 3203 * @depth: bit depth per pixel 3204 * 3205 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 3206 * Useful in fbdev emulation code, since that deals in those values. 3207 */ 3208 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 3209 { 3210 uint32_t fmt; 3211 3212 switch (bpp) { 3213 case 8: 3214 fmt = DRM_FORMAT_C8; 3215 break; 3216 case 16: 3217 if (depth == 15) 3218 fmt = DRM_FORMAT_XRGB1555; 3219 else 3220 fmt = DRM_FORMAT_RGB565; 3221 break; 3222 case 24: 3223 fmt = DRM_FORMAT_RGB888; 3224 break; 3225 case 32: 3226 if (depth == 24) 3227 fmt = DRM_FORMAT_XRGB8888; 3228 else if (depth == 30) 3229 fmt = DRM_FORMAT_XRGB2101010; 3230 else 3231 fmt = DRM_FORMAT_ARGB8888; 3232 break; 3233 default: 3234 DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); 3235 fmt = DRM_FORMAT_XRGB8888; 3236 break; 3237 } 3238 3239 return fmt; 3240 } 3241 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 3242 3243 /** 3244 * drm_mode_addfb - add an FB to the graphics configuration 3245 * @dev: drm device for the ioctl 3246 * @data: data pointer for the ioctl 3247 * @file_priv: drm file for the ioctl call 3248 * 3249 * Add a new FB to the specified CRTC, given a user request. This is the 3250 * original addfb ioctl which only supported RGB formats. 3251 * 3252 * Called by the user via ioctl. 3253 * 3254 * Returns: 3255 * Zero on success, negative errno on failure. 3256 */ 3257 int drm_mode_addfb(struct drm_device *dev, 3258 void *data, struct drm_file *file_priv) 3259 { 3260 struct drm_mode_fb_cmd *or = data; 3261 struct drm_mode_fb_cmd2 r = {}; 3262 int ret; 3263 3264 /* convert to new format and call new ioctl */ 3265 r.fb_id = or->fb_id; 3266 r.width = or->width; 3267 r.height = or->height; 3268 r.pitches[0] = or->pitch; 3269 r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth); 3270 r.handles[0] = or->handle; 3271 3272 ret = drm_mode_addfb2(dev, &r, file_priv); 3273 if (ret) 3274 return ret; 3275 3276 or->fb_id = r.fb_id; 3277 3278 return 0; 3279 } 3280 3281 static int format_check(const struct drm_mode_fb_cmd2 *r) 3282 { 3283 uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN; 3284 3285 switch (format) { 3286 case DRM_FORMAT_C8: 3287 case DRM_FORMAT_RGB332: 3288 case DRM_FORMAT_BGR233: 3289 case DRM_FORMAT_XRGB4444: 3290 case DRM_FORMAT_XBGR4444: 3291 case DRM_FORMAT_RGBX4444: 3292 case DRM_FORMAT_BGRX4444: 3293 case DRM_FORMAT_ARGB4444: 3294 case DRM_FORMAT_ABGR4444: 3295 case DRM_FORMAT_RGBA4444: 3296 case DRM_FORMAT_BGRA4444: 3297 case DRM_FORMAT_XRGB1555: 3298 case DRM_FORMAT_XBGR1555: 3299 case DRM_FORMAT_RGBX5551: 3300 case DRM_FORMAT_BGRX5551: 3301 case DRM_FORMAT_ARGB1555: 3302 case DRM_FORMAT_ABGR1555: 3303 case DRM_FORMAT_RGBA5551: 3304 case DRM_FORMAT_BGRA5551: 3305 case DRM_FORMAT_RGB565: 3306 case DRM_FORMAT_BGR565: 3307 case DRM_FORMAT_RGB888: 3308 case DRM_FORMAT_BGR888: 3309 case DRM_FORMAT_XRGB8888: 3310 case DRM_FORMAT_XBGR8888: 3311 case DRM_FORMAT_RGBX8888: 3312 case DRM_FORMAT_BGRX8888: 3313 case DRM_FORMAT_ARGB8888: 3314 case DRM_FORMAT_ABGR8888: 3315 case DRM_FORMAT_RGBA8888: 3316 case DRM_FORMAT_BGRA8888: 3317 case DRM_FORMAT_XRGB2101010: 3318 case DRM_FORMAT_XBGR2101010: 3319 case DRM_FORMAT_RGBX1010102: 3320 case DRM_FORMAT_BGRX1010102: 3321 case DRM_FORMAT_ARGB2101010: 3322 case DRM_FORMAT_ABGR2101010: 3323 case DRM_FORMAT_RGBA1010102: 3324 case DRM_FORMAT_BGRA1010102: 3325 case DRM_FORMAT_YUYV: 3326 case DRM_FORMAT_YVYU: 3327 case DRM_FORMAT_UYVY: 3328 case DRM_FORMAT_VYUY: 3329 case DRM_FORMAT_AYUV: 3330 case DRM_FORMAT_NV12: 3331 case DRM_FORMAT_NV21: 3332 case DRM_FORMAT_NV16: 3333 case DRM_FORMAT_NV61: 3334 case DRM_FORMAT_NV24: 3335 case DRM_FORMAT_NV42: 3336 case DRM_FORMAT_YUV410: 3337 case DRM_FORMAT_YVU410: 3338 case DRM_FORMAT_YUV411: 3339 case DRM_FORMAT_YVU411: 3340 case DRM_FORMAT_YUV420: 3341 case DRM_FORMAT_YVU420: 3342 case DRM_FORMAT_YUV422: 3343 case DRM_FORMAT_YVU422: 3344 case DRM_FORMAT_YUV444: 3345 case DRM_FORMAT_YVU444: 3346 return 0; 3347 default: 3348 DRM_DEBUG_KMS("invalid pixel format %s\n", 3349 drm_get_format_name(r->pixel_format)); 3350 return -EINVAL; 3351 } 3352 } 3353 3354 static int framebuffer_check(const struct drm_mode_fb_cmd2 *r) 3355 { 3356 int ret, hsub, vsub, num_planes, i; 3357 3358 ret = format_check(r); 3359 if (ret) { 3360 DRM_DEBUG_KMS("bad framebuffer format %s\n", 3361 drm_get_format_name(r->pixel_format)); 3362 return ret; 3363 } 3364 3365 hsub = drm_format_horz_chroma_subsampling(r->pixel_format); 3366 vsub = drm_format_vert_chroma_subsampling(r->pixel_format); 3367 num_planes = drm_format_num_planes(r->pixel_format); 3368 3369 if (r->width == 0 || r->width % hsub) { 3370 DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width); 3371 return -EINVAL; 3372 } 3373 3374 if (r->height == 0 || r->height % vsub) { 3375 DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height); 3376 return -EINVAL; 3377 } 3378 3379 for (i = 0; i < num_planes; i++) { 3380 unsigned int width = r->width / (i != 0 ? hsub : 1); 3381 unsigned int height = r->height / (i != 0 ? vsub : 1); 3382 unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i); 3383 3384 if (!r->handles[i]) { 3385 DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i); 3386 return -EINVAL; 3387 } 3388 3389 if ((uint64_t) width * cpp > UINT_MAX) 3390 return -ERANGE; 3391 3392 if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX) 3393 return -ERANGE; 3394 3395 if (r->pitches[i] < width * cpp) { 3396 DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i); 3397 return -EINVAL; 3398 } 3399 3400 if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) { 3401 DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n", 3402 r->modifier[i], i); 3403 return -EINVAL; 3404 } 3405 3406 /* modifier specific checks: */ 3407 switch (r->modifier[i]) { 3408 case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE: 3409 /* NOTE: the pitch restriction may be lifted later if it turns 3410 * out that no hw has this restriction: 3411 */ 3412 if (r->pixel_format != DRM_FORMAT_NV12 || 3413 width % 128 || height % 32 || 3414 r->pitches[i] % 128) { 3415 DRM_DEBUG_KMS("bad modifier data for plane %d\n", i); 3416 return -EINVAL; 3417 } 3418 break; 3419 3420 default: 3421 break; 3422 } 3423 } 3424 3425 for (i = num_planes; i < 4; i++) { 3426 if (r->modifier[i]) { 3427 DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i); 3428 return -EINVAL; 3429 } 3430 3431 /* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */ 3432 if (!(r->flags & DRM_MODE_FB_MODIFIERS)) 3433 continue; 3434 3435 if (r->handles[i]) { 3436 DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i); 3437 return -EINVAL; 3438 } 3439 3440 if (r->pitches[i]) { 3441 DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i); 3442 return -EINVAL; 3443 } 3444 3445 if (r->offsets[i]) { 3446 DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i); 3447 return -EINVAL; 3448 } 3449 } 3450 3451 return 0; 3452 } 3453 3454 static struct drm_framebuffer * 3455 internal_framebuffer_create(struct drm_device *dev, 3456 const struct drm_mode_fb_cmd2 *r, 3457 struct drm_file *file_priv) 3458 { 3459 struct drm_mode_config *config = &dev->mode_config; 3460 struct drm_framebuffer *fb; 3461 int ret; 3462 3463 if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) { 3464 DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); 3465 return ERR_PTR(-EINVAL); 3466 } 3467 3468 if ((config->min_width > r->width) || (r->width > config->max_width)) { 3469 DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n", 3470 r->width, config->min_width, config->max_width); 3471 return ERR_PTR(-EINVAL); 3472 } 3473 if ((config->min_height > r->height) || (r->height > config->max_height)) { 3474 DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n", 3475 r->height, config->min_height, config->max_height); 3476 return ERR_PTR(-EINVAL); 3477 } 3478 3479 if (r->flags & DRM_MODE_FB_MODIFIERS && 3480 !dev->mode_config.allow_fb_modifiers) { 3481 DRM_DEBUG_KMS("driver does not support fb modifiers\n"); 3482 return ERR_PTR(-EINVAL); 3483 } 3484 3485 ret = framebuffer_check(r); 3486 if (ret) 3487 return ERR_PTR(ret); 3488 3489 fb = dev->mode_config.funcs->fb_create(dev, file_priv, r); 3490 if (IS_ERR(fb)) { 3491 DRM_DEBUG_KMS("could not create framebuffer\n"); 3492 return fb; 3493 } 3494 3495 return fb; 3496 } 3497 3498 /** 3499 * drm_mode_addfb2 - add an FB to the graphics configuration 3500 * @dev: drm device for the ioctl 3501 * @data: data pointer for the ioctl 3502 * @file_priv: drm file for the ioctl call 3503 * 3504 * Add a new FB to the specified CRTC, given a user request with format. This is 3505 * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers 3506 * and uses fourcc codes as pixel format specifiers. 3507 * 3508 * Called by the user via ioctl. 3509 * 3510 * Returns: 3511 * Zero on success, negative errno on failure. 3512 */ 3513 int drm_mode_addfb2(struct drm_device *dev, 3514 void *data, struct drm_file *file_priv) 3515 { 3516 struct drm_mode_fb_cmd2 *r = data; 3517 struct drm_framebuffer *fb; 3518 3519 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3520 return -EINVAL; 3521 3522 fb = internal_framebuffer_create(dev, r, file_priv); 3523 if (IS_ERR(fb)) 3524 return PTR_ERR(fb); 3525 3526 DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id); 3527 r->fb_id = fb->base.id; 3528 3529 /* Transfer ownership to the filp for reaping on close */ 3530 mutex_lock(&file_priv->fbs_lock); 3531 list_add(&fb->filp_head, &file_priv->fbs); 3532 mutex_unlock(&file_priv->fbs_lock); 3533 3534 return 0; 3535 } 3536 3537 struct drm_mode_rmfb_work { 3538 struct work_struct work; 3539 struct list_head fbs; 3540 }; 3541 3542 static void drm_mode_rmfb_work_fn(struct work_struct *w) 3543 { 3544 struct drm_mode_rmfb_work *arg = container_of(w, typeof(*arg), work); 3545 3546 while (!list_empty(&arg->fbs)) { 3547 struct drm_framebuffer *fb = 3548 list_first_entry(&arg->fbs, typeof(*fb), filp_head); 3549 3550 list_del_init(&fb->filp_head); 3551 drm_framebuffer_remove(fb); 3552 } 3553 } 3554 3555 /** 3556 * drm_mode_rmfb - remove an FB from the configuration 3557 * @dev: drm device for the ioctl 3558 * @data: data pointer for the ioctl 3559 * @file_priv: drm file for the ioctl call 3560 * 3561 * Remove the FB specified by the user. 3562 * 3563 * Called by the user via ioctl. 3564 * 3565 * Returns: 3566 * Zero on success, negative errno on failure. 3567 */ 3568 int drm_mode_rmfb(struct drm_device *dev, 3569 void *data, struct drm_file *file_priv) 3570 { 3571 struct drm_framebuffer *fb = NULL; 3572 struct drm_framebuffer *fbl = NULL; 3573 uint32_t *id = data; 3574 int found = 0; 3575 3576 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3577 return -EINVAL; 3578 3579 fb = drm_framebuffer_lookup(dev, *id); 3580 if (!fb) 3581 return -ENOENT; 3582 3583 mutex_lock(&file_priv->fbs_lock); 3584 list_for_each_entry(fbl, &file_priv->fbs, filp_head) 3585 if (fb == fbl) 3586 found = 1; 3587 if (!found) { 3588 mutex_unlock(&file_priv->fbs_lock); 3589 goto fail_unref; 3590 } 3591 3592 list_del_init(&fb->filp_head); 3593 mutex_unlock(&file_priv->fbs_lock); 3594 3595 /* drop the reference we picked up in framebuffer lookup */ 3596 drm_framebuffer_unreference(fb); 3597 3598 /* 3599 * we now own the reference that was stored in the fbs list 3600 * 3601 * drm_framebuffer_remove may fail with -EINTR on pending signals, 3602 * so run this in a separate stack as there's no way to correctly 3603 * handle this after the fb is already removed from the lookup table. 3604 */ 3605 if (drm_framebuffer_read_refcount(fb) > 1) { 3606 struct drm_mode_rmfb_work arg; 3607 3608 INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); 3609 INIT_LIST_HEAD(&arg.fbs); 3610 list_add_tail(&fb->filp_head, &arg.fbs); 3611 3612 schedule_work(&arg.work); 3613 flush_work(&arg.work); 3614 destroy_work_on_stack(&arg.work); 3615 } else 3616 drm_framebuffer_unreference(fb); 3617 3618 return 0; 3619 3620 fail_unref: 3621 drm_framebuffer_unreference(fb); 3622 return -ENOENT; 3623 } 3624 3625 /** 3626 * drm_mode_getfb - get FB info 3627 * @dev: drm device for the ioctl 3628 * @data: data pointer for the ioctl 3629 * @file_priv: drm file for the ioctl call 3630 * 3631 * Lookup the FB given its ID and return info about it. 3632 * 3633 * Called by the user via ioctl. 3634 * 3635 * Returns: 3636 * Zero on success, negative errno on failure. 3637 */ 3638 int drm_mode_getfb(struct drm_device *dev, 3639 void *data, struct drm_file *file_priv) 3640 { 3641 struct drm_mode_fb_cmd *r = data; 3642 struct drm_framebuffer *fb; 3643 int ret; 3644 3645 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3646 return -EINVAL; 3647 3648 fb = drm_framebuffer_lookup(dev, r->fb_id); 3649 if (!fb) 3650 return -ENOENT; 3651 3652 r->height = fb->height; 3653 r->width = fb->width; 3654 r->depth = fb->depth; 3655 r->bpp = fb->bits_per_pixel; 3656 r->pitch = fb->pitches[0]; 3657 if (fb->funcs->create_handle) { 3658 if (drm_is_current_master(file_priv) || capable(CAP_SYS_ADMIN) || 3659 drm_is_control_client(file_priv)) { 3660 ret = fb->funcs->create_handle(fb, file_priv, 3661 &r->handle); 3662 } else { 3663 /* GET_FB() is an unprivileged ioctl so we must not 3664 * return a buffer-handle to non-master processes! For 3665 * backwards-compatibility reasons, we cannot make 3666 * GET_FB() privileged, so just return an invalid handle 3667 * for non-masters. */ 3668 r->handle = 0; 3669 ret = 0; 3670 } 3671 } else { 3672 ret = -ENODEV; 3673 } 3674 3675 drm_framebuffer_unreference(fb); 3676 3677 return ret; 3678 } 3679 3680 /** 3681 * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB 3682 * @dev: drm device for the ioctl 3683 * @data: data pointer for the ioctl 3684 * @file_priv: drm file for the ioctl call 3685 * 3686 * Lookup the FB and flush out the damaged area supplied by userspace as a clip 3687 * rectangle list. Generic userspace which does frontbuffer rendering must call 3688 * this ioctl to flush out the changes on manual-update display outputs, e.g. 3689 * usb display-link, mipi manual update panels or edp panel self refresh modes. 3690 * 3691 * Modesetting drivers which always update the frontbuffer do not need to 3692 * implement the corresponding ->dirty framebuffer callback. 3693 * 3694 * Called by the user via ioctl. 3695 * 3696 * Returns: 3697 * Zero on success, negative errno on failure. 3698 */ 3699 int drm_mode_dirtyfb_ioctl(struct drm_device *dev, 3700 void *data, struct drm_file *file_priv) 3701 { 3702 struct drm_clip_rect __user *clips_ptr; 3703 struct drm_clip_rect *clips = NULL; 3704 struct drm_mode_fb_dirty_cmd *r = data; 3705 struct drm_framebuffer *fb; 3706 unsigned flags; 3707 int num_clips; 3708 int ret; 3709 3710 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 3711 return -EINVAL; 3712 3713 fb = drm_framebuffer_lookup(dev, r->fb_id); 3714 if (!fb) 3715 return -ENOENT; 3716 3717 num_clips = r->num_clips; 3718 clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr; 3719 3720 if (!num_clips != !clips_ptr) { 3721 ret = -EINVAL; 3722 goto out_err1; 3723 } 3724 3725 flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags; 3726 3727 /* If userspace annotates copy, clips must come in pairs */ 3728 if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) { 3729 ret = -EINVAL; 3730 goto out_err1; 3731 } 3732 3733 if (num_clips && clips_ptr) { 3734 if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) { 3735 ret = -EINVAL; 3736 goto out_err1; 3737 } 3738 clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL); 3739 if (!clips) { 3740 ret = -ENOMEM; 3741 goto out_err1; 3742 } 3743 3744 ret = copy_from_user(clips, clips_ptr, 3745 num_clips * sizeof(*clips)); 3746 if (ret) { 3747 ret = -EFAULT; 3748 goto out_err2; 3749 } 3750 } 3751 3752 if (fb->funcs->dirty) { 3753 ret = fb->funcs->dirty(fb, file_priv, flags, r->color, 3754 clips, num_clips); 3755 } else { 3756 ret = -ENOSYS; 3757 } 3758 3759 out_err2: 3760 kfree(clips); 3761 out_err1: 3762 drm_framebuffer_unreference(fb); 3763 3764 return ret; 3765 } 3766 3767 /** 3768 * drm_fb_release - remove and free the FBs on this file 3769 * @priv: drm file for the ioctl 3770 * 3771 * Destroy all the FBs associated with @filp. 3772 * 3773 * Called by the user via ioctl. 3774 * 3775 * Returns: 3776 * Zero on success, negative errno on failure. 3777 */ 3778 void drm_fb_release(struct drm_file *priv) 3779 { 3780 struct drm_framebuffer *fb, *tfb; 3781 struct drm_mode_rmfb_work arg; 3782 3783 INIT_LIST_HEAD(&arg.fbs); 3784 3785 /* 3786 * When the file gets released that means no one else can access the fb 3787 * list any more, so no need to grab fpriv->fbs_lock. And we need to 3788 * avoid upsetting lockdep since the universal cursor code adds a 3789 * framebuffer while holding mutex locks. 3790 * 3791 * Note that a real deadlock between fpriv->fbs_lock and the modeset 3792 * locks is impossible here since no one else but this function can get 3793 * at it any more. 3794 */ 3795 list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) { 3796 if (drm_framebuffer_read_refcount(fb) > 1) { 3797 list_move_tail(&fb->filp_head, &arg.fbs); 3798 } else { 3799 list_del_init(&fb->filp_head); 3800 3801 /* This drops the fpriv->fbs reference. */ 3802 drm_framebuffer_unreference(fb); 3803 } 3804 } 3805 3806 if (!list_empty(&arg.fbs)) { 3807 INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn); 3808 3809 schedule_work(&arg.work); 3810 flush_work(&arg.work); 3811 destroy_work_on_stack(&arg.work); 3812 } 3813 } 3814 3815 static bool drm_property_type_valid(struct drm_property *property) 3816 { 3817 if (property->flags & DRM_MODE_PROP_EXTENDED_TYPE) 3818 return !(property->flags & DRM_MODE_PROP_LEGACY_TYPE); 3819 return !!(property->flags & DRM_MODE_PROP_LEGACY_TYPE); 3820 } 3821 3822 /** 3823 * drm_property_create - create a new property type 3824 * @dev: drm device 3825 * @flags: flags specifying the property type 3826 * @name: name of the property 3827 * @num_values: number of pre-defined values 3828 * 3829 * This creates a new generic drm property which can then be attached to a drm 3830 * object with drm_object_attach_property. The returned property object must be 3831 * freed with drm_property_destroy. 3832 * 3833 * Note that the DRM core keeps a per-device list of properties and that, if 3834 * drm_mode_config_cleanup() is called, it will destroy all properties created 3835 * by the driver. 3836 * 3837 * Returns: 3838 * A pointer to the newly created property on success, NULL on failure. 3839 */ 3840 struct drm_property *drm_property_create(struct drm_device *dev, int flags, 3841 const char *name, int num_values) 3842 { 3843 struct drm_property *property = NULL; 3844 int ret; 3845 3846 property = kzalloc(sizeof(struct drm_property), GFP_KERNEL); 3847 if (!property) 3848 return NULL; 3849 3850 property->dev = dev; 3851 3852 if (num_values) { 3853 property->values = kcalloc(num_values, sizeof(uint64_t), 3854 GFP_KERNEL); 3855 if (!property->values) 3856 goto fail; 3857 } 3858 3859 ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY); 3860 if (ret) 3861 goto fail; 3862 3863 property->flags = flags; 3864 property->num_values = num_values; 3865 INIT_LIST_HEAD(&property->enum_list); 3866 3867 if (name) { 3868 strncpy(property->name, name, DRM_PROP_NAME_LEN); 3869 property->name[DRM_PROP_NAME_LEN-1] = '\0'; 3870 } 3871 3872 list_add_tail(&property->head, &dev->mode_config.property_list); 3873 3874 WARN_ON(!drm_property_type_valid(property)); 3875 3876 return property; 3877 fail: 3878 kfree(property->values); 3879 kfree(property); 3880 return NULL; 3881 } 3882 EXPORT_SYMBOL(drm_property_create); 3883 3884 /** 3885 * drm_property_create_enum - create a new enumeration property type 3886 * @dev: drm device 3887 * @flags: flags specifying the property type 3888 * @name: name of the property 3889 * @props: enumeration lists with property values 3890 * @num_values: number of pre-defined values 3891 * 3892 * This creates a new generic drm property which can then be attached to a drm 3893 * object with drm_object_attach_property. The returned property object must be 3894 * freed with drm_property_destroy. 3895 * 3896 * Userspace is only allowed to set one of the predefined values for enumeration 3897 * properties. 3898 * 3899 * Returns: 3900 * A pointer to the newly created property on success, NULL on failure. 3901 */ 3902 struct drm_property *drm_property_create_enum(struct drm_device *dev, int flags, 3903 const char *name, 3904 const struct drm_prop_enum_list *props, 3905 int num_values) 3906 { 3907 struct drm_property *property; 3908 int i, ret; 3909 3910 flags |= DRM_MODE_PROP_ENUM; 3911 3912 property = drm_property_create(dev, flags, name, num_values); 3913 if (!property) 3914 return NULL; 3915 3916 for (i = 0; i < num_values; i++) { 3917 ret = drm_property_add_enum(property, i, 3918 props[i].type, 3919 props[i].name); 3920 if (ret) { 3921 drm_property_destroy(dev, property); 3922 return NULL; 3923 } 3924 } 3925 3926 return property; 3927 } 3928 EXPORT_SYMBOL(drm_property_create_enum); 3929 3930 /** 3931 * drm_property_create_bitmask - create a new bitmask property type 3932 * @dev: drm device 3933 * @flags: flags specifying the property type 3934 * @name: name of the property 3935 * @props: enumeration lists with property bitflags 3936 * @num_props: size of the @props array 3937 * @supported_bits: bitmask of all supported enumeration values 3938 * 3939 * This creates a new bitmask drm property which can then be attached to a drm 3940 * object with drm_object_attach_property. The returned property object must be 3941 * freed with drm_property_destroy. 3942 * 3943 * Compared to plain enumeration properties userspace is allowed to set any 3944 * or'ed together combination of the predefined property bitflag values 3945 * 3946 * Returns: 3947 * A pointer to the newly created property on success, NULL on failure. 3948 */ 3949 struct drm_property *drm_property_create_bitmask(struct drm_device *dev, 3950 int flags, const char *name, 3951 const struct drm_prop_enum_list *props, 3952 int num_props, 3953 uint64_t supported_bits) 3954 { 3955 struct drm_property *property; 3956 int i, ret, index = 0; 3957 int num_values = hweight64(supported_bits); 3958 3959 flags |= DRM_MODE_PROP_BITMASK; 3960 3961 property = drm_property_create(dev, flags, name, num_values); 3962 if (!property) 3963 return NULL; 3964 for (i = 0; i < num_props; i++) { 3965 if (!(supported_bits & (1ULL << props[i].type))) 3966 continue; 3967 3968 if (WARN_ON(index >= num_values)) { 3969 drm_property_destroy(dev, property); 3970 return NULL; 3971 } 3972 3973 ret = drm_property_add_enum(property, index++, 3974 props[i].type, 3975 props[i].name); 3976 if (ret) { 3977 drm_property_destroy(dev, property); 3978 return NULL; 3979 } 3980 } 3981 3982 return property; 3983 } 3984 EXPORT_SYMBOL(drm_property_create_bitmask); 3985 3986 static struct drm_property *property_create_range(struct drm_device *dev, 3987 int flags, const char *name, 3988 uint64_t min, uint64_t max) 3989 { 3990 struct drm_property *property; 3991 3992 property = drm_property_create(dev, flags, name, 2); 3993 if (!property) 3994 return NULL; 3995 3996 property->values[0] = min; 3997 property->values[1] = max; 3998 3999 return property; 4000 } 4001 4002 /** 4003 * drm_property_create_range - create a new unsigned ranged property type 4004 * @dev: drm device 4005 * @flags: flags specifying the property type 4006 * @name: name of the property 4007 * @min: minimum value of the property 4008 * @max: maximum value of the property 4009 * 4010 * This creates a new generic drm property which can then be attached to a drm 4011 * object with drm_object_attach_property. The returned property object must be 4012 * freed with drm_property_destroy. 4013 * 4014 * Userspace is allowed to set any unsigned integer value in the (min, max) 4015 * range inclusive. 4016 * 4017 * Returns: 4018 * A pointer to the newly created property on success, NULL on failure. 4019 */ 4020 struct drm_property *drm_property_create_range(struct drm_device *dev, int flags, 4021 const char *name, 4022 uint64_t min, uint64_t max) 4023 { 4024 return property_create_range(dev, DRM_MODE_PROP_RANGE | flags, 4025 name, min, max); 4026 } 4027 EXPORT_SYMBOL(drm_property_create_range); 4028 4029 /** 4030 * drm_property_create_signed_range - create a new signed ranged property type 4031 * @dev: drm device 4032 * @flags: flags specifying the property type 4033 * @name: name of the property 4034 * @min: minimum value of the property 4035 * @max: maximum value of the property 4036 * 4037 * This creates a new generic drm property which can then be attached to a drm 4038 * object with drm_object_attach_property. The returned property object must be 4039 * freed with drm_property_destroy. 4040 * 4041 * Userspace is allowed to set any signed integer value in the (min, max) 4042 * range inclusive. 4043 * 4044 * Returns: 4045 * A pointer to the newly created property on success, NULL on failure. 4046 */ 4047 struct drm_property *drm_property_create_signed_range(struct drm_device *dev, 4048 int flags, const char *name, 4049 int64_t min, int64_t max) 4050 { 4051 return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE | flags, 4052 name, I642U64(min), I642U64(max)); 4053 } 4054 EXPORT_SYMBOL(drm_property_create_signed_range); 4055 4056 /** 4057 * drm_property_create_object - create a new object property type 4058 * @dev: drm device 4059 * @flags: flags specifying the property type 4060 * @name: name of the property 4061 * @type: object type from DRM_MODE_OBJECT_* defines 4062 * 4063 * This creates a new generic drm property which can then be attached to a drm 4064 * object with drm_object_attach_property. The returned property object must be 4065 * freed with drm_property_destroy. 4066 * 4067 * Userspace is only allowed to set this to any property value of the given 4068 * @type. Only useful for atomic properties, which is enforced. 4069 * 4070 * Returns: 4071 * A pointer to the newly created property on success, NULL on failure. 4072 */ 4073 struct drm_property *drm_property_create_object(struct drm_device *dev, 4074 int flags, const char *name, uint32_t type) 4075 { 4076 struct drm_property *property; 4077 4078 flags |= DRM_MODE_PROP_OBJECT; 4079 4080 if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC))) 4081 return NULL; 4082 4083 property = drm_property_create(dev, flags, name, 1); 4084 if (!property) 4085 return NULL; 4086 4087 property->values[0] = type; 4088 4089 return property; 4090 } 4091 EXPORT_SYMBOL(drm_property_create_object); 4092 4093 /** 4094 * drm_property_create_bool - create a new boolean property type 4095 * @dev: drm device 4096 * @flags: flags specifying the property type 4097 * @name: name of the property 4098 * 4099 * This creates a new generic drm property which can then be attached to a drm 4100 * object with drm_object_attach_property. The returned property object must be 4101 * freed with drm_property_destroy. 4102 * 4103 * This is implemented as a ranged property with only {0, 1} as valid values. 4104 * 4105 * Returns: 4106 * A pointer to the newly created property on success, NULL on failure. 4107 */ 4108 struct drm_property *drm_property_create_bool(struct drm_device *dev, int flags, 4109 const char *name) 4110 { 4111 return drm_property_create_range(dev, flags, name, 0, 1); 4112 } 4113 EXPORT_SYMBOL(drm_property_create_bool); 4114 4115 /** 4116 * drm_property_add_enum - add a possible value to an enumeration property 4117 * @property: enumeration property to change 4118 * @index: index of the new enumeration 4119 * @value: value of the new enumeration 4120 * @name: symbolic name of the new enumeration 4121 * 4122 * This functions adds enumerations to a property. 4123 * 4124 * It's use is deprecated, drivers should use one of the more specific helpers 4125 * to directly create the property with all enumerations already attached. 4126 * 4127 * Returns: 4128 * Zero on success, error code on failure. 4129 */ 4130 int drm_property_add_enum(struct drm_property *property, int index, 4131 uint64_t value, const char *name) 4132 { 4133 struct drm_property_enum *prop_enum; 4134 4135 if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4136 drm_property_type_is(property, DRM_MODE_PROP_BITMASK))) 4137 return -EINVAL; 4138 4139 /* 4140 * Bitmask enum properties have the additional constraint of values 4141 * from 0 to 63 4142 */ 4143 if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) && 4144 (value > 63)) 4145 return -EINVAL; 4146 4147 if (!list_empty(&property->enum_list)) { 4148 list_for_each_entry(prop_enum, &property->enum_list, head) { 4149 if (prop_enum->value == value) { 4150 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 4151 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 4152 return 0; 4153 } 4154 } 4155 } 4156 4157 prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL); 4158 if (!prop_enum) 4159 return -ENOMEM; 4160 4161 strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN); 4162 prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0'; 4163 prop_enum->value = value; 4164 4165 property->values[index] = value; 4166 list_add_tail(&prop_enum->head, &property->enum_list); 4167 return 0; 4168 } 4169 EXPORT_SYMBOL(drm_property_add_enum); 4170 4171 /** 4172 * drm_property_destroy - destroy a drm property 4173 * @dev: drm device 4174 * @property: property to destry 4175 * 4176 * This function frees a property including any attached resources like 4177 * enumeration values. 4178 */ 4179 void drm_property_destroy(struct drm_device *dev, struct drm_property *property) 4180 { 4181 struct drm_property_enum *prop_enum, *pt; 4182 4183 list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) { 4184 list_del(&prop_enum->head); 4185 kfree(prop_enum); 4186 } 4187 4188 if (property->num_values) 4189 kfree(property->values); 4190 drm_mode_object_unregister(dev, &property->base); 4191 list_del(&property->head); 4192 kfree(property); 4193 } 4194 EXPORT_SYMBOL(drm_property_destroy); 4195 4196 /** 4197 * drm_object_attach_property - attach a property to a modeset object 4198 * @obj: drm modeset object 4199 * @property: property to attach 4200 * @init_val: initial value of the property 4201 * 4202 * This attaches the given property to the modeset object with the given initial 4203 * value. Currently this function cannot fail since the properties are stored in 4204 * a statically sized array. 4205 */ 4206 void drm_object_attach_property(struct drm_mode_object *obj, 4207 struct drm_property *property, 4208 uint64_t init_val) 4209 { 4210 int count = obj->properties->count; 4211 4212 if (count == DRM_OBJECT_MAX_PROPERTY) { 4213 WARN(1, "Failed to attach object property (type: 0x%x). Please " 4214 "increase DRM_OBJECT_MAX_PROPERTY by 1 for each time " 4215 "you see this message on the same object type.\n", 4216 obj->type); 4217 return; 4218 } 4219 4220 obj->properties->properties[count] = property; 4221 obj->properties->values[count] = init_val; 4222 obj->properties->count++; 4223 if (property->flags & DRM_MODE_PROP_ATOMIC) 4224 obj->properties->atomic_count++; 4225 } 4226 EXPORT_SYMBOL(drm_object_attach_property); 4227 4228 /** 4229 * drm_object_property_set_value - set the value of a property 4230 * @obj: drm mode object to set property value for 4231 * @property: property to set 4232 * @val: value the property should be set to 4233 * 4234 * This functions sets a given property on a given object. This function only 4235 * changes the software state of the property, it does not call into the 4236 * driver's ->set_property callback. 4237 * 4238 * Returns: 4239 * Zero on success, error code on failure. 4240 */ 4241 int drm_object_property_set_value(struct drm_mode_object *obj, 4242 struct drm_property *property, uint64_t val) 4243 { 4244 int i; 4245 4246 for (i = 0; i < obj->properties->count; i++) { 4247 if (obj->properties->properties[i] == property) { 4248 obj->properties->values[i] = val; 4249 return 0; 4250 } 4251 } 4252 4253 return -EINVAL; 4254 } 4255 EXPORT_SYMBOL(drm_object_property_set_value); 4256 4257 /** 4258 * drm_object_property_get_value - retrieve the value of a property 4259 * @obj: drm mode object to get property value from 4260 * @property: property to retrieve 4261 * @val: storage for the property value 4262 * 4263 * This function retrieves the softare state of the given property for the given 4264 * property. Since there is no driver callback to retrieve the current property 4265 * value this might be out of sync with the hardware, depending upon the driver 4266 * and property. 4267 * 4268 * Returns: 4269 * Zero on success, error code on failure. 4270 */ 4271 int drm_object_property_get_value(struct drm_mode_object *obj, 4272 struct drm_property *property, uint64_t *val) 4273 { 4274 int i; 4275 4276 /* read-only properties bypass atomic mechanism and still store 4277 * their value in obj->properties->values[].. mostly to avoid 4278 * having to deal w/ EDID and similar props in atomic paths: 4279 */ 4280 if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) && 4281 !(property->flags & DRM_MODE_PROP_IMMUTABLE)) 4282 return drm_atomic_get_property(obj, property, val); 4283 4284 for (i = 0; i < obj->properties->count; i++) { 4285 if (obj->properties->properties[i] == property) { 4286 *val = obj->properties->values[i]; 4287 return 0; 4288 } 4289 } 4290 4291 return -EINVAL; 4292 } 4293 EXPORT_SYMBOL(drm_object_property_get_value); 4294 4295 /** 4296 * drm_mode_getproperty_ioctl - get the property metadata 4297 * @dev: DRM device 4298 * @data: ioctl data 4299 * @file_priv: DRM file info 4300 * 4301 * This function retrieves the metadata for a given property, like the different 4302 * possible values for an enum property or the limits for a range property. 4303 * 4304 * Blob properties are special 4305 * 4306 * Called by the user via ioctl. 4307 * 4308 * Returns: 4309 * Zero on success, negative errno on failure. 4310 */ 4311 int drm_mode_getproperty_ioctl(struct drm_device *dev, 4312 void *data, struct drm_file *file_priv) 4313 { 4314 struct drm_mode_get_property *out_resp = data; 4315 struct drm_property *property; 4316 int enum_count = 0; 4317 int value_count = 0; 4318 int ret = 0, i; 4319 int copied; 4320 struct drm_property_enum *prop_enum; 4321 struct drm_mode_property_enum __user *enum_ptr; 4322 uint64_t __user *values_ptr; 4323 4324 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4325 return -EINVAL; 4326 4327 drm_modeset_lock_all(dev); 4328 property = drm_property_find(dev, out_resp->prop_id); 4329 if (!property) { 4330 ret = -ENOENT; 4331 goto done; 4332 } 4333 4334 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4335 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4336 list_for_each_entry(prop_enum, &property->enum_list, head) 4337 enum_count++; 4338 } 4339 4340 value_count = property->num_values; 4341 4342 strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN); 4343 out_resp->name[DRM_PROP_NAME_LEN-1] = 0; 4344 out_resp->flags = property->flags; 4345 4346 if ((out_resp->count_values >= value_count) && value_count) { 4347 values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr; 4348 for (i = 0; i < value_count; i++) { 4349 if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) { 4350 ret = -EFAULT; 4351 goto done; 4352 } 4353 } 4354 } 4355 out_resp->count_values = value_count; 4356 4357 if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) || 4358 drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4359 if ((out_resp->count_enum_blobs >= enum_count) && enum_count) { 4360 copied = 0; 4361 enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr; 4362 list_for_each_entry(prop_enum, &property->enum_list, head) { 4363 4364 if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) { 4365 ret = -EFAULT; 4366 goto done; 4367 } 4368 4369 if (copy_to_user(&enum_ptr[copied].name, 4370 &prop_enum->name, DRM_PROP_NAME_LEN)) { 4371 ret = -EFAULT; 4372 goto done; 4373 } 4374 copied++; 4375 } 4376 } 4377 out_resp->count_enum_blobs = enum_count; 4378 } 4379 4380 /* 4381 * NOTE: The idea seems to have been to use this to read all the blob 4382 * property values. But nothing ever added them to the corresponding 4383 * list, userspace always used the special-purpose get_blob ioctl to 4384 * read the value for a blob property. It also doesn't make a lot of 4385 * sense to return values here when everything else is just metadata for 4386 * the property itself. 4387 */ 4388 if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4389 out_resp->count_enum_blobs = 0; 4390 done: 4391 drm_modeset_unlock_all(dev); 4392 return ret; 4393 } 4394 4395 static void drm_property_free_blob(struct kref *kref) 4396 { 4397 struct drm_property_blob *blob = 4398 container_of(kref, struct drm_property_blob, base.refcount); 4399 4400 mutex_lock(&blob->dev->mode_config.blob_lock); 4401 list_del(&blob->head_global); 4402 mutex_unlock(&blob->dev->mode_config.blob_lock); 4403 4404 drm_mode_object_unregister(blob->dev, &blob->base); 4405 4406 kfree(blob); 4407 } 4408 4409 /** 4410 * drm_property_create_blob - Create new blob property 4411 * 4412 * Creates a new blob property for a specified DRM device, optionally 4413 * copying data. 4414 * 4415 * @dev: DRM device to create property for 4416 * @length: Length to allocate for blob data 4417 * @data: If specified, copies data into blob 4418 * 4419 * Returns: 4420 * New blob property with a single reference on success, or an ERR_PTR 4421 * value on failure. 4422 */ 4423 struct drm_property_blob * 4424 drm_property_create_blob(struct drm_device *dev, size_t length, 4425 const void *data) 4426 { 4427 struct drm_property_blob *blob; 4428 int ret; 4429 4430 if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob)) 4431 return ERR_PTR(-EINVAL); 4432 4433 blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL); 4434 if (!blob) 4435 return ERR_PTR(-ENOMEM); 4436 4437 /* This must be explicitly initialised, so we can safely call list_del 4438 * on it in the removal handler, even if it isn't in a file list. */ 4439 INIT_LIST_HEAD(&blob->head_file); 4440 blob->length = length; 4441 blob->dev = dev; 4442 4443 if (data) 4444 memcpy(blob->data, data, length); 4445 4446 ret = drm_mode_object_get_reg(dev, &blob->base, DRM_MODE_OBJECT_BLOB, 4447 true, drm_property_free_blob); 4448 if (ret) { 4449 kfree(blob); 4450 return ERR_PTR(-EINVAL); 4451 } 4452 4453 mutex_lock(&dev->mode_config.blob_lock); 4454 list_add_tail(&blob->head_global, 4455 &dev->mode_config.property_blob_list); 4456 mutex_unlock(&dev->mode_config.blob_lock); 4457 4458 return blob; 4459 } 4460 EXPORT_SYMBOL(drm_property_create_blob); 4461 4462 /** 4463 * drm_property_unreference_blob - Unreference a blob property 4464 * 4465 * Drop a reference on a blob property. May free the object. 4466 * 4467 * @blob: Pointer to blob property 4468 */ 4469 void drm_property_unreference_blob(struct drm_property_blob *blob) 4470 { 4471 if (!blob) 4472 return; 4473 4474 drm_mode_object_unreference(&blob->base); 4475 } 4476 EXPORT_SYMBOL(drm_property_unreference_blob); 4477 4478 /** 4479 * drm_property_destroy_user_blobs - destroy all blobs created by this client 4480 * @dev: DRM device 4481 * @file_priv: destroy all blobs owned by this file handle 4482 */ 4483 void drm_property_destroy_user_blobs(struct drm_device *dev, 4484 struct drm_file *file_priv) 4485 { 4486 struct drm_property_blob *blob, *bt; 4487 4488 /* 4489 * When the file gets released that means no one else can access the 4490 * blob list any more, so no need to grab dev->blob_lock. 4491 */ 4492 list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) { 4493 list_del_init(&blob->head_file); 4494 drm_property_unreference_blob(blob); 4495 } 4496 } 4497 4498 /** 4499 * drm_property_reference_blob - Take a reference on an existing property 4500 * 4501 * Take a new reference on an existing blob property. 4502 * 4503 * @blob: Pointer to blob property 4504 */ 4505 struct drm_property_blob *drm_property_reference_blob(struct drm_property_blob *blob) 4506 { 4507 drm_mode_object_reference(&blob->base); 4508 return blob; 4509 } 4510 EXPORT_SYMBOL(drm_property_reference_blob); 4511 4512 /** 4513 * drm_property_lookup_blob - look up a blob property and take a reference 4514 * @dev: drm device 4515 * @id: id of the blob property 4516 * 4517 * If successful, this takes an additional reference to the blob property. 4518 * callers need to make sure to eventually unreference the returned property 4519 * again, using @drm_property_unreference_blob. 4520 */ 4521 struct drm_property_blob *drm_property_lookup_blob(struct drm_device *dev, 4522 uint32_t id) 4523 { 4524 struct drm_mode_object *obj; 4525 struct drm_property_blob *blob = NULL; 4526 4527 obj = _object_find(dev, id, DRM_MODE_OBJECT_BLOB); 4528 if (obj) 4529 blob = obj_to_blob(obj); 4530 return blob; 4531 } 4532 EXPORT_SYMBOL(drm_property_lookup_blob); 4533 4534 /** 4535 * drm_property_replace_global_blob - atomically replace existing blob property 4536 * @dev: drm device 4537 * @replace: location of blob property pointer to be replaced 4538 * @length: length of data for new blob, or 0 for no data 4539 * @data: content for new blob, or NULL for no data 4540 * @obj_holds_id: optional object for property holding blob ID 4541 * @prop_holds_id: optional property holding blob ID 4542 * @return 0 on success or error on failure 4543 * 4544 * This function will atomically replace a global property in the blob list, 4545 * optionally updating a property which holds the ID of that property. It is 4546 * guaranteed to be atomic: no caller will be allowed to see intermediate 4547 * results, and either the entire operation will succeed and clean up the 4548 * previous property, or it will fail and the state will be unchanged. 4549 * 4550 * If length is 0 or data is NULL, no new blob will be created, and the holding 4551 * property, if specified, will be set to 0. 4552 * 4553 * Access to the replace pointer is assumed to be protected by the caller, e.g. 4554 * by holding the relevant modesetting object lock for its parent. 4555 * 4556 * For example, a drm_connector has a 'PATH' property, which contains the ID 4557 * of a blob property with the value of the MST path information. Calling this 4558 * function with replace pointing to the connector's path_blob_ptr, length and 4559 * data set for the new path information, obj_holds_id set to the connector's 4560 * base object, and prop_holds_id set to the path property name, will perform 4561 * a completely atomic update. The access to path_blob_ptr is protected by the 4562 * caller holding a lock on the connector. 4563 */ 4564 static int drm_property_replace_global_blob(struct drm_device *dev, 4565 struct drm_property_blob **replace, 4566 size_t length, 4567 const void *data, 4568 struct drm_mode_object *obj_holds_id, 4569 struct drm_property *prop_holds_id) 4570 { 4571 struct drm_property_blob *new_blob = NULL; 4572 struct drm_property_blob *old_blob = NULL; 4573 int ret; 4574 4575 WARN_ON(replace == NULL); 4576 4577 old_blob = *replace; 4578 4579 if (length && data) { 4580 new_blob = drm_property_create_blob(dev, length, data); 4581 if (IS_ERR(new_blob)) 4582 return PTR_ERR(new_blob); 4583 } 4584 4585 /* This does not need to be synchronised with blob_lock, as the 4586 * get_properties ioctl locks all modesetting objects, and 4587 * obj_holds_id must be locked before calling here, so we cannot 4588 * have its value out of sync with the list membership modified 4589 * below under blob_lock. */ 4590 if (obj_holds_id) { 4591 ret = drm_object_property_set_value(obj_holds_id, 4592 prop_holds_id, 4593 new_blob ? 4594 new_blob->base.id : 0); 4595 if (ret != 0) 4596 goto err_created; 4597 } 4598 4599 drm_property_unreference_blob(old_blob); 4600 *replace = new_blob; 4601 4602 return 0; 4603 4604 err_created: 4605 drm_property_unreference_blob(new_blob); 4606 return ret; 4607 } 4608 4609 /** 4610 * drm_mode_getblob_ioctl - get the contents of a blob property value 4611 * @dev: DRM device 4612 * @data: ioctl data 4613 * @file_priv: DRM file info 4614 * 4615 * This function retrieves the contents of a blob property. The value stored in 4616 * an object's blob property is just a normal modeset object id. 4617 * 4618 * Called by the user via ioctl. 4619 * 4620 * Returns: 4621 * Zero on success, negative errno on failure. 4622 */ 4623 int drm_mode_getblob_ioctl(struct drm_device *dev, 4624 void *data, struct drm_file *file_priv) 4625 { 4626 struct drm_mode_get_blob *out_resp = data; 4627 struct drm_property_blob *blob; 4628 int ret = 0; 4629 void __user *blob_ptr; 4630 4631 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4632 return -EINVAL; 4633 4634 blob = drm_property_lookup_blob(dev, out_resp->blob_id); 4635 if (!blob) 4636 return -ENOENT; 4637 4638 if (out_resp->length == blob->length) { 4639 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4640 if (copy_to_user(blob_ptr, blob->data, blob->length)) { 4641 ret = -EFAULT; 4642 goto unref; 4643 } 4644 } 4645 out_resp->length = blob->length; 4646 unref: 4647 drm_property_unreference_blob(blob); 4648 4649 return ret; 4650 } 4651 4652 /** 4653 * drm_mode_createblob_ioctl - create a new blob property 4654 * @dev: DRM device 4655 * @data: ioctl data 4656 * @file_priv: DRM file info 4657 * 4658 * This function creates a new blob property with user-defined values. In order 4659 * to give us sensible validation and checking when creating, rather than at 4660 * every potential use, we also require a type to be provided upfront. 4661 * 4662 * Called by the user via ioctl. 4663 * 4664 * Returns: 4665 * Zero on success, negative errno on failure. 4666 */ 4667 int drm_mode_createblob_ioctl(struct drm_device *dev, 4668 void *data, struct drm_file *file_priv) 4669 { 4670 struct drm_mode_create_blob *out_resp = data; 4671 struct drm_property_blob *blob; 4672 void __user *blob_ptr; 4673 int ret = 0; 4674 4675 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4676 return -EINVAL; 4677 4678 blob = drm_property_create_blob(dev, out_resp->length, NULL); 4679 if (IS_ERR(blob)) 4680 return PTR_ERR(blob); 4681 4682 blob_ptr = (void __user *)(unsigned long)out_resp->data; 4683 if (copy_from_user(blob->data, blob_ptr, out_resp->length)) { 4684 ret = -EFAULT; 4685 goto out_blob; 4686 } 4687 4688 /* Dropping the lock between create_blob and our access here is safe 4689 * as only the same file_priv can remove the blob; at this point, it is 4690 * not associated with any file_priv. */ 4691 mutex_lock(&dev->mode_config.blob_lock); 4692 out_resp->blob_id = blob->base.id; 4693 list_add_tail(&blob->head_file, &file_priv->blobs); 4694 mutex_unlock(&dev->mode_config.blob_lock); 4695 4696 return 0; 4697 4698 out_blob: 4699 drm_property_unreference_blob(blob); 4700 return ret; 4701 } 4702 4703 /** 4704 * drm_mode_destroyblob_ioctl - destroy a user blob property 4705 * @dev: DRM device 4706 * @data: ioctl data 4707 * @file_priv: DRM file info 4708 * 4709 * Destroy an existing user-defined blob property. 4710 * 4711 * Called by the user via ioctl. 4712 * 4713 * Returns: 4714 * Zero on success, negative errno on failure. 4715 */ 4716 int drm_mode_destroyblob_ioctl(struct drm_device *dev, 4717 void *data, struct drm_file *file_priv) 4718 { 4719 struct drm_mode_destroy_blob *out_resp = data; 4720 struct drm_property_blob *blob = NULL, *bt; 4721 bool found = false; 4722 int ret = 0; 4723 4724 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 4725 return -EINVAL; 4726 4727 blob = drm_property_lookup_blob(dev, out_resp->blob_id); 4728 if (!blob) 4729 return -ENOENT; 4730 4731 mutex_lock(&dev->mode_config.blob_lock); 4732 /* Ensure the property was actually created by this user. */ 4733 list_for_each_entry(bt, &file_priv->blobs, head_file) { 4734 if (bt == blob) { 4735 found = true; 4736 break; 4737 } 4738 } 4739 4740 if (!found) { 4741 ret = -EPERM; 4742 goto err; 4743 } 4744 4745 /* We must drop head_file here, because we may not be the last 4746 * reference on the blob. */ 4747 list_del_init(&blob->head_file); 4748 mutex_unlock(&dev->mode_config.blob_lock); 4749 4750 /* One reference from lookup, and one from the filp. */ 4751 drm_property_unreference_blob(blob); 4752 drm_property_unreference_blob(blob); 4753 4754 return 0; 4755 4756 err: 4757 mutex_unlock(&dev->mode_config.blob_lock); 4758 drm_property_unreference_blob(blob); 4759 4760 return ret; 4761 } 4762 4763 /** 4764 * drm_mode_connector_set_path_property - set tile property on connector 4765 * @connector: connector to set property on. 4766 * @path: path to use for property; must not be NULL. 4767 * 4768 * This creates a property to expose to userspace to specify a 4769 * connector path. This is mainly used for DisplayPort MST where 4770 * connectors have a topology and we want to allow userspace to give 4771 * them more meaningful names. 4772 * 4773 * Returns: 4774 * Zero on success, negative errno on failure. 4775 */ 4776 int drm_mode_connector_set_path_property(struct drm_connector *connector, 4777 const char *path) 4778 { 4779 struct drm_device *dev = connector->dev; 4780 int ret; 4781 4782 ret = drm_property_replace_global_blob(dev, 4783 &connector->path_blob_ptr, 4784 strlen(path) + 1, 4785 path, 4786 &connector->base, 4787 dev->mode_config.path_property); 4788 return ret; 4789 } 4790 EXPORT_SYMBOL(drm_mode_connector_set_path_property); 4791 4792 /** 4793 * drm_mode_connector_set_tile_property - set tile property on connector 4794 * @connector: connector to set property on. 4795 * 4796 * This looks up the tile information for a connector, and creates a 4797 * property for userspace to parse if it exists. The property is of 4798 * the form of 8 integers using ':' as a separator. 4799 * 4800 * Returns: 4801 * Zero on success, errno on failure. 4802 */ 4803 int drm_mode_connector_set_tile_property(struct drm_connector *connector) 4804 { 4805 struct drm_device *dev = connector->dev; 4806 char tile[256]; 4807 int ret; 4808 4809 if (!connector->has_tile) { 4810 ret = drm_property_replace_global_blob(dev, 4811 &connector->tile_blob_ptr, 4812 0, 4813 NULL, 4814 &connector->base, 4815 dev->mode_config.tile_property); 4816 return ret; 4817 } 4818 4819 snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", 4820 connector->tile_group->id, connector->tile_is_single_monitor, 4821 connector->num_h_tile, connector->num_v_tile, 4822 connector->tile_h_loc, connector->tile_v_loc, 4823 connector->tile_h_size, connector->tile_v_size); 4824 4825 ret = drm_property_replace_global_blob(dev, 4826 &connector->tile_blob_ptr, 4827 strlen(tile) + 1, 4828 tile, 4829 &connector->base, 4830 dev->mode_config.tile_property); 4831 return ret; 4832 } 4833 EXPORT_SYMBOL(drm_mode_connector_set_tile_property); 4834 4835 /** 4836 * drm_mode_connector_update_edid_property - update the edid property of a connector 4837 * @connector: drm connector 4838 * @edid: new value of the edid property 4839 * 4840 * This function creates a new blob modeset object and assigns its id to the 4841 * connector's edid property. 4842 * 4843 * Returns: 4844 * Zero on success, negative errno on failure. 4845 */ 4846 int drm_mode_connector_update_edid_property(struct drm_connector *connector, 4847 const struct edid *edid) 4848 { 4849 struct drm_device *dev = connector->dev; 4850 size_t size = 0; 4851 int ret; 4852 4853 /* ignore requests to set edid when overridden */ 4854 if (connector->override_edid) 4855 return 0; 4856 4857 if (edid) 4858 size = EDID_LENGTH * (1 + edid->extensions); 4859 4860 ret = drm_property_replace_global_blob(dev, 4861 &connector->edid_blob_ptr, 4862 size, 4863 edid, 4864 &connector->base, 4865 dev->mode_config.edid_property); 4866 return ret; 4867 } 4868 EXPORT_SYMBOL(drm_mode_connector_update_edid_property); 4869 4870 /* Some properties could refer to dynamic refcnt'd objects, or things that 4871 * need special locking to handle lifetime issues (ie. to ensure the prop 4872 * value doesn't become invalid part way through the property update due to 4873 * race). The value returned by reference via 'obj' should be passed back 4874 * to drm_property_change_valid_put() after the property is set (and the 4875 * object to which the property is attached has a chance to take it's own 4876 * reference). 4877 */ 4878 bool drm_property_change_valid_get(struct drm_property *property, 4879 uint64_t value, struct drm_mode_object **ref) 4880 { 4881 int i; 4882 4883 if (property->flags & DRM_MODE_PROP_IMMUTABLE) 4884 return false; 4885 4886 *ref = NULL; 4887 4888 if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) { 4889 if (value < property->values[0] || value > property->values[1]) 4890 return false; 4891 return true; 4892 } else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) { 4893 int64_t svalue = U642I64(value); 4894 4895 if (svalue < U642I64(property->values[0]) || 4896 svalue > U642I64(property->values[1])) 4897 return false; 4898 return true; 4899 } else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) { 4900 uint64_t valid_mask = 0; 4901 4902 for (i = 0; i < property->num_values; i++) 4903 valid_mask |= (1ULL << property->values[i]); 4904 return !(value & ~valid_mask); 4905 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) { 4906 struct drm_property_blob *blob; 4907 4908 if (value == 0) 4909 return true; 4910 4911 blob = drm_property_lookup_blob(property->dev, value); 4912 if (blob) { 4913 *ref = &blob->base; 4914 return true; 4915 } else { 4916 return false; 4917 } 4918 } else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4919 /* a zero value for an object property translates to null: */ 4920 if (value == 0) 4921 return true; 4922 4923 *ref = _object_find(property->dev, value, property->values[0]); 4924 return *ref != NULL; 4925 } 4926 4927 for (i = 0; i < property->num_values; i++) 4928 if (property->values[i] == value) 4929 return true; 4930 return false; 4931 } 4932 4933 void drm_property_change_valid_put(struct drm_property *property, 4934 struct drm_mode_object *ref) 4935 { 4936 if (!ref) 4937 return; 4938 4939 if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) { 4940 drm_mode_object_unreference(ref); 4941 } else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) 4942 drm_property_unreference_blob(obj_to_blob(ref)); 4943 } 4944 4945 /** 4946 * drm_mode_connector_property_set_ioctl - set the current value of a connector property 4947 * @dev: DRM device 4948 * @data: ioctl data 4949 * @file_priv: DRM file info 4950 * 4951 * This function sets the current value for a connectors's property. It also 4952 * calls into a driver's ->set_property callback to update the hardware state 4953 * 4954 * Called by the user via ioctl. 4955 * 4956 * Returns: 4957 * Zero on success, negative errno on failure. 4958 */ 4959 int drm_mode_connector_property_set_ioctl(struct drm_device *dev, 4960 void *data, struct drm_file *file_priv) 4961 { 4962 struct drm_mode_connector_set_property *conn_set_prop = data; 4963 struct drm_mode_obj_set_property obj_set_prop = { 4964 .value = conn_set_prop->value, 4965 .prop_id = conn_set_prop->prop_id, 4966 .obj_id = conn_set_prop->connector_id, 4967 .obj_type = DRM_MODE_OBJECT_CONNECTOR 4968 }; 4969 4970 /* It does all the locking and checking we need */ 4971 return drm_mode_obj_set_property_ioctl(dev, &obj_set_prop, file_priv); 4972 } 4973 4974 static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj, 4975 struct drm_property *property, 4976 uint64_t value) 4977 { 4978 int ret = -EINVAL; 4979 struct drm_connector *connector = obj_to_connector(obj); 4980 4981 /* Do DPMS ourselves */ 4982 if (property == connector->dev->mode_config.dpms_property) { 4983 ret = (*connector->funcs->dpms)(connector, (int)value); 4984 } else if (connector->funcs->set_property) 4985 ret = connector->funcs->set_property(connector, property, value); 4986 4987 /* store the property value if successful */ 4988 if (!ret) 4989 drm_object_property_set_value(&connector->base, property, value); 4990 return ret; 4991 } 4992 4993 static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj, 4994 struct drm_property *property, 4995 uint64_t value) 4996 { 4997 int ret = -EINVAL; 4998 struct drm_crtc *crtc = obj_to_crtc(obj); 4999 5000 if (crtc->funcs->set_property) 5001 ret = crtc->funcs->set_property(crtc, property, value); 5002 if (!ret) 5003 drm_object_property_set_value(obj, property, value); 5004 5005 return ret; 5006 } 5007 5008 /** 5009 * drm_mode_plane_set_obj_prop - set the value of a property 5010 * @plane: drm plane object to set property value for 5011 * @property: property to set 5012 * @value: value the property should be set to 5013 * 5014 * This functions sets a given property on a given plane object. This function 5015 * calls the driver's ->set_property callback and changes the software state of 5016 * the property if the callback succeeds. 5017 * 5018 * Returns: 5019 * Zero on success, error code on failure. 5020 */ 5021 int drm_mode_plane_set_obj_prop(struct drm_plane *plane, 5022 struct drm_property *property, 5023 uint64_t value) 5024 { 5025 int ret = -EINVAL; 5026 struct drm_mode_object *obj = &plane->base; 5027 5028 if (plane->funcs->set_property) 5029 ret = plane->funcs->set_property(plane, property, value); 5030 if (!ret) 5031 drm_object_property_set_value(obj, property, value); 5032 5033 return ret; 5034 } 5035 EXPORT_SYMBOL(drm_mode_plane_set_obj_prop); 5036 5037 /** 5038 * drm_mode_obj_get_properties_ioctl - get the current value of a object's property 5039 * @dev: DRM device 5040 * @data: ioctl data 5041 * @file_priv: DRM file info 5042 * 5043 * This function retrieves the current value for an object's property. Compared 5044 * to the connector specific ioctl this one is extended to also work on crtc and 5045 * plane objects. 5046 * 5047 * Called by the user via ioctl. 5048 * 5049 * Returns: 5050 * Zero on success, negative errno on failure. 5051 */ 5052 int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data, 5053 struct drm_file *file_priv) 5054 { 5055 struct drm_mode_obj_get_properties *arg = data; 5056 struct drm_mode_object *obj; 5057 int ret = 0; 5058 5059 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5060 return -EINVAL; 5061 5062 drm_modeset_lock_all(dev); 5063 5064 obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 5065 if (!obj) { 5066 ret = -ENOENT; 5067 goto out; 5068 } 5069 if (!obj->properties) { 5070 ret = -EINVAL; 5071 goto out_unref; 5072 } 5073 5074 ret = get_properties(obj, file_priv->atomic, 5075 (uint32_t __user *)(unsigned long)(arg->props_ptr), 5076 (uint64_t __user *)(unsigned long)(arg->prop_values_ptr), 5077 &arg->count_props); 5078 5079 out_unref: 5080 drm_mode_object_unreference(obj); 5081 out: 5082 drm_modeset_unlock_all(dev); 5083 return ret; 5084 } 5085 5086 /** 5087 * drm_mode_obj_set_property_ioctl - set the current value of an object's property 5088 * @dev: DRM device 5089 * @data: ioctl data 5090 * @file_priv: DRM file info 5091 * 5092 * This function sets the current value for an object's property. It also calls 5093 * into a driver's ->set_property callback to update the hardware state. 5094 * Compared to the connector specific ioctl this one is extended to also work on 5095 * crtc and plane objects. 5096 * 5097 * Called by the user via ioctl. 5098 * 5099 * Returns: 5100 * Zero on success, negative errno on failure. 5101 */ 5102 int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data, 5103 struct drm_file *file_priv) 5104 { 5105 struct drm_mode_obj_set_property *arg = data; 5106 struct drm_mode_object *arg_obj; 5107 struct drm_mode_object *prop_obj; 5108 struct drm_property *property; 5109 int i, ret = -EINVAL; 5110 struct drm_mode_object *ref; 5111 5112 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5113 return -EINVAL; 5114 5115 drm_modeset_lock_all(dev); 5116 5117 arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type); 5118 if (!arg_obj) { 5119 ret = -ENOENT; 5120 goto out; 5121 } 5122 if (!arg_obj->properties) 5123 goto out_unref; 5124 5125 for (i = 0; i < arg_obj->properties->count; i++) 5126 if (arg_obj->properties->properties[i]->base.id == arg->prop_id) 5127 break; 5128 5129 if (i == arg_obj->properties->count) 5130 goto out_unref; 5131 5132 prop_obj = drm_mode_object_find(dev, arg->prop_id, 5133 DRM_MODE_OBJECT_PROPERTY); 5134 if (!prop_obj) { 5135 ret = -ENOENT; 5136 goto out_unref; 5137 } 5138 property = obj_to_property(prop_obj); 5139 5140 if (!drm_property_change_valid_get(property, arg->value, &ref)) 5141 goto out_unref; 5142 5143 switch (arg_obj->type) { 5144 case DRM_MODE_OBJECT_CONNECTOR: 5145 ret = drm_mode_connector_set_obj_prop(arg_obj, property, 5146 arg->value); 5147 break; 5148 case DRM_MODE_OBJECT_CRTC: 5149 ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value); 5150 break; 5151 case DRM_MODE_OBJECT_PLANE: 5152 ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj), 5153 property, arg->value); 5154 break; 5155 } 5156 5157 drm_property_change_valid_put(property, ref); 5158 5159 out_unref: 5160 drm_mode_object_unreference(arg_obj); 5161 out: 5162 drm_modeset_unlock_all(dev); 5163 return ret; 5164 } 5165 5166 /** 5167 * drm_mode_connector_attach_encoder - attach a connector to an encoder 5168 * @connector: connector to attach 5169 * @encoder: encoder to attach @connector to 5170 * 5171 * This function links up a connector to an encoder. Note that the routing 5172 * restrictions between encoders and crtcs are exposed to userspace through the 5173 * possible_clones and possible_crtcs bitmasks. 5174 * 5175 * Returns: 5176 * Zero on success, negative errno on failure. 5177 */ 5178 int drm_mode_connector_attach_encoder(struct drm_connector *connector, 5179 struct drm_encoder *encoder) 5180 { 5181 int i; 5182 5183 /* 5184 * In the past, drivers have attempted to model the static association 5185 * of connector to encoder in simple connector/encoder devices using a 5186 * direct assignment of connector->encoder = encoder. This connection 5187 * is a logical one and the responsibility of the core, so drivers are 5188 * expected not to mess with this. 5189 * 5190 * Note that the error return should've been enough here, but a large 5191 * majority of drivers ignores the return value, so add in a big WARN 5192 * to get people's attention. 5193 */ 5194 if (WARN_ON(connector->encoder)) 5195 return -EINVAL; 5196 5197 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) { 5198 if (connector->encoder_ids[i] == 0) { 5199 connector->encoder_ids[i] = encoder->base.id; 5200 return 0; 5201 } 5202 } 5203 return -ENOMEM; 5204 } 5205 EXPORT_SYMBOL(drm_mode_connector_attach_encoder); 5206 5207 /** 5208 * drm_mode_crtc_set_gamma_size - set the gamma table size 5209 * @crtc: CRTC to set the gamma table size for 5210 * @gamma_size: size of the gamma table 5211 * 5212 * Drivers which support gamma tables should set this to the supported gamma 5213 * table size when initializing the CRTC. Currently the drm core only supports a 5214 * fixed gamma table size. 5215 * 5216 * Returns: 5217 * Zero on success, negative errno on failure. 5218 */ 5219 int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, 5220 int gamma_size) 5221 { 5222 uint16_t *r_base, *g_base, *b_base; 5223 int i; 5224 5225 crtc->gamma_size = gamma_size; 5226 5227 crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, 5228 GFP_KERNEL); 5229 if (!crtc->gamma_store) { 5230 crtc->gamma_size = 0; 5231 return -ENOMEM; 5232 } 5233 5234 r_base = crtc->gamma_store; 5235 g_base = r_base + gamma_size; 5236 b_base = g_base + gamma_size; 5237 for (i = 0; i < gamma_size; i++) { 5238 r_base[i] = i << 8; 5239 g_base[i] = i << 8; 5240 b_base[i] = i << 8; 5241 } 5242 5243 5244 return 0; 5245 } 5246 EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); 5247 5248 /** 5249 * drm_mode_gamma_set_ioctl - set the gamma table 5250 * @dev: DRM device 5251 * @data: ioctl data 5252 * @file_priv: DRM file info 5253 * 5254 * Set the gamma table of a CRTC to the one passed in by the user. Userspace can 5255 * inquire the required gamma table size through drm_mode_gamma_get_ioctl. 5256 * 5257 * Called by the user via ioctl. 5258 * 5259 * Returns: 5260 * Zero on success, negative errno on failure. 5261 */ 5262 int drm_mode_gamma_set_ioctl(struct drm_device *dev, 5263 void *data, struct drm_file *file_priv) 5264 { 5265 struct drm_mode_crtc_lut *crtc_lut = data; 5266 struct drm_crtc *crtc; 5267 void *r_base, *g_base, *b_base; 5268 int size; 5269 int ret = 0; 5270 5271 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5272 return -EINVAL; 5273 5274 drm_modeset_lock_all(dev); 5275 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5276 if (!crtc) { 5277 ret = -ENOENT; 5278 goto out; 5279 } 5280 5281 if (crtc->funcs->gamma_set == NULL) { 5282 ret = -ENOSYS; 5283 goto out; 5284 } 5285 5286 /* memcpy into gamma store */ 5287 if (crtc_lut->gamma_size != crtc->gamma_size) { 5288 ret = -EINVAL; 5289 goto out; 5290 } 5291 5292 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5293 r_base = crtc->gamma_store; 5294 if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { 5295 ret = -EFAULT; 5296 goto out; 5297 } 5298 5299 g_base = r_base + size; 5300 if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { 5301 ret = -EFAULT; 5302 goto out; 5303 } 5304 5305 b_base = g_base + size; 5306 if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { 5307 ret = -EFAULT; 5308 goto out; 5309 } 5310 5311 ret = crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size); 5312 5313 out: 5314 drm_modeset_unlock_all(dev); 5315 return ret; 5316 5317 } 5318 5319 /** 5320 * drm_mode_gamma_get_ioctl - get the gamma table 5321 * @dev: DRM device 5322 * @data: ioctl data 5323 * @file_priv: DRM file info 5324 * 5325 * Copy the current gamma table into the storage provided. This also provides 5326 * the gamma table size the driver expects, which can be used to size the 5327 * allocated storage. 5328 * 5329 * Called by the user via ioctl. 5330 * 5331 * Returns: 5332 * Zero on success, negative errno on failure. 5333 */ 5334 int drm_mode_gamma_get_ioctl(struct drm_device *dev, 5335 void *data, struct drm_file *file_priv) 5336 { 5337 struct drm_mode_crtc_lut *crtc_lut = data; 5338 struct drm_crtc *crtc; 5339 void *r_base, *g_base, *b_base; 5340 int size; 5341 int ret = 0; 5342 5343 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 5344 return -EINVAL; 5345 5346 drm_modeset_lock_all(dev); 5347 crtc = drm_crtc_find(dev, crtc_lut->crtc_id); 5348 if (!crtc) { 5349 ret = -ENOENT; 5350 goto out; 5351 } 5352 5353 /* memcpy into gamma store */ 5354 if (crtc_lut->gamma_size != crtc->gamma_size) { 5355 ret = -EINVAL; 5356 goto out; 5357 } 5358 5359 size = crtc_lut->gamma_size * (sizeof(uint16_t)); 5360 r_base = crtc->gamma_store; 5361 if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { 5362 ret = -EFAULT; 5363 goto out; 5364 } 5365 5366 g_base = r_base + size; 5367 if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { 5368 ret = -EFAULT; 5369 goto out; 5370 } 5371 5372 b_base = g_base + size; 5373 if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { 5374 ret = -EFAULT; 5375 goto out; 5376 } 5377 out: 5378 drm_modeset_unlock_all(dev); 5379 return ret; 5380 } 5381 5382 /** 5383 * drm_mode_page_flip_ioctl - schedule an asynchronous fb update 5384 * @dev: DRM device 5385 * @data: ioctl data 5386 * @file_priv: DRM file info 5387 * 5388 * This schedules an asynchronous update on a given CRTC, called page flip. 5389 * Optionally a drm event is generated to signal the completion of the event. 5390 * Generic drivers cannot assume that a pageflip with changed framebuffer 5391 * properties (including driver specific metadata like tiling layout) will work, 5392 * but some drivers support e.g. pixel format changes through the pageflip 5393 * ioctl. 5394 * 5395 * Called by the user via ioctl. 5396 * 5397 * Returns: 5398 * Zero on success, negative errno on failure. 5399 */ 5400 int drm_mode_page_flip_ioctl(struct drm_device *dev, 5401 void *data, struct drm_file *file_priv) 5402 { 5403 struct drm_mode_crtc_page_flip *page_flip = data; 5404 struct drm_crtc *crtc; 5405 struct drm_framebuffer *fb = NULL; 5406 struct drm_pending_vblank_event *e = NULL; 5407 int ret = -EINVAL; 5408 5409 if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || 5410 page_flip->reserved != 0) 5411 return -EINVAL; 5412 5413 if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) 5414 return -EINVAL; 5415 5416 crtc = drm_crtc_find(dev, page_flip->crtc_id); 5417 if (!crtc) 5418 return -ENOENT; 5419 5420 drm_modeset_lock_crtc(crtc, crtc->primary); 5421 if (crtc->primary->fb == NULL) { 5422 /* The framebuffer is currently unbound, presumably 5423 * due to a hotplug event, that userspace has not 5424 * yet discovered. 5425 */ 5426 ret = -EBUSY; 5427 goto out; 5428 } 5429 5430 if (crtc->funcs->page_flip == NULL) 5431 goto out; 5432 5433 fb = drm_framebuffer_lookup(dev, page_flip->fb_id); 5434 if (!fb) { 5435 ret = -ENOENT; 5436 goto out; 5437 } 5438 5439 if (crtc->state) { 5440 const struct drm_plane_state *state = crtc->primary->state; 5441 5442 ret = check_src_coords(state->src_x, state->src_y, 5443 state->src_w, state->src_h, fb); 5444 } else { 5445 ret = drm_crtc_check_viewport(crtc, crtc->x, crtc->y, &crtc->mode, fb); 5446 } 5447 if (ret) 5448 goto out; 5449 5450 if (crtc->primary->fb->pixel_format != fb->pixel_format) { 5451 DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n"); 5452 ret = -EINVAL; 5453 goto out; 5454 } 5455 5456 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) { 5457 e = kzalloc(sizeof *e, GFP_KERNEL); 5458 if (!e) { 5459 ret = -ENOMEM; 5460 goto out; 5461 } 5462 e->event.base.type = DRM_EVENT_FLIP_COMPLETE; 5463 e->event.base.length = sizeof(e->event); 5464 e->event.user_data = page_flip->user_data; 5465 ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base); 5466 if (ret) { 5467 kfree(e); 5468 goto out; 5469 } 5470 } 5471 5472 crtc->primary->old_fb = crtc->primary->fb; 5473 ret = crtc->funcs->page_flip(crtc, fb, e, page_flip->flags); 5474 if (ret) { 5475 if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) 5476 drm_event_cancel_free(dev, &e->base); 5477 /* Keep the old fb, don't unref it. */ 5478 crtc->primary->old_fb = NULL; 5479 } else { 5480 crtc->primary->fb = fb; 5481 /* Unref only the old framebuffer. */ 5482 fb = NULL; 5483 } 5484 5485 out: 5486 if (fb) 5487 drm_framebuffer_unreference(fb); 5488 if (crtc->primary->old_fb) 5489 drm_framebuffer_unreference(crtc->primary->old_fb); 5490 crtc->primary->old_fb = NULL; 5491 drm_modeset_unlock_crtc(crtc); 5492 5493 return ret; 5494 } 5495 5496 /** 5497 * drm_mode_config_reset - call ->reset callbacks 5498 * @dev: drm device 5499 * 5500 * This functions calls all the crtc's, encoder's and connector's ->reset 5501 * callback. Drivers can use this in e.g. their driver load or resume code to 5502 * reset hardware and software state. 5503 */ 5504 void drm_mode_config_reset(struct drm_device *dev) 5505 { 5506 struct drm_crtc *crtc; 5507 struct drm_plane *plane; 5508 struct drm_encoder *encoder; 5509 struct drm_connector *connector; 5510 5511 drm_for_each_plane(plane, dev) 5512 if (plane->funcs->reset) 5513 plane->funcs->reset(plane); 5514 5515 drm_for_each_crtc(crtc, dev) 5516 if (crtc->funcs->reset) 5517 crtc->funcs->reset(crtc); 5518 5519 drm_for_each_encoder(encoder, dev) 5520 if (encoder->funcs->reset) 5521 encoder->funcs->reset(encoder); 5522 5523 mutex_lock(&dev->mode_config.mutex); 5524 drm_for_each_connector(connector, dev) 5525 if (connector->funcs->reset) 5526 connector->funcs->reset(connector); 5527 mutex_unlock(&dev->mode_config.mutex); 5528 } 5529 EXPORT_SYMBOL(drm_mode_config_reset); 5530 5531 /** 5532 * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer 5533 * @dev: DRM device 5534 * @data: ioctl data 5535 * @file_priv: DRM file info 5536 * 5537 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 5538 * TTM or something else entirely) and returns the resulting buffer handle. This 5539 * handle can then be wrapped up into a framebuffer modeset object. 5540 * 5541 * Note that userspace is not allowed to use such objects for render 5542 * acceleration - drivers must create their own private ioctls for such a use 5543 * case. 5544 * 5545 * Called by the user via ioctl. 5546 * 5547 * Returns: 5548 * Zero on success, negative errno on failure. 5549 */ 5550 int drm_mode_create_dumb_ioctl(struct drm_device *dev, 5551 void *data, struct drm_file *file_priv) 5552 { 5553 struct drm_mode_create_dumb *args = data; 5554 u32 cpp, stride, size; 5555 5556 if (!dev->driver->dumb_create) 5557 return -ENOSYS; 5558 if (!args->width || !args->height || !args->bpp) 5559 return -EINVAL; 5560 5561 /* overflow checks for 32bit size calculations */ 5562 /* NOTE: DIV_ROUND_UP() can overflow */ 5563 cpp = DIV_ROUND_UP(args->bpp, 8); 5564 if (!cpp || cpp > 0xffffffffU / args->width) 5565 return -EINVAL; 5566 stride = cpp * args->width; 5567 if (args->height > 0xffffffffU / stride) 5568 return -EINVAL; 5569 5570 /* test for wrap-around */ 5571 size = args->height * stride; 5572 if (PAGE_ALIGN(size) == 0) 5573 return -EINVAL; 5574 5575 /* 5576 * handle, pitch and size are output parameters. Zero them out to 5577 * prevent drivers from accidentally using uninitialized data. Since 5578 * not all existing userspace is clearing these fields properly we 5579 * cannot reject IOCTL with garbage in them. 5580 */ 5581 args->handle = 0; 5582 args->pitch = 0; 5583 args->size = 0; 5584 5585 return dev->driver->dumb_create(file_priv, dev, args); 5586 } 5587 5588 /** 5589 * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer 5590 * @dev: DRM device 5591 * @data: ioctl data 5592 * @file_priv: DRM file info 5593 * 5594 * Allocate an offset in the drm device node's address space to be able to 5595 * memory map a dumb buffer. 5596 * 5597 * Called by the user via ioctl. 5598 * 5599 * Returns: 5600 * Zero on success, negative errno on failure. 5601 */ 5602 int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, 5603 void *data, struct drm_file *file_priv) 5604 { 5605 struct drm_mode_map_dumb *args = data; 5606 5607 /* call driver ioctl to get mmap offset */ 5608 if (!dev->driver->dumb_map_offset) 5609 return -ENOSYS; 5610 5611 return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); 5612 } 5613 5614 /** 5615 * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer 5616 * @dev: DRM device 5617 * @data: ioctl data 5618 * @file_priv: DRM file info 5619 * 5620 * This destroys the userspace handle for the given dumb backing storage buffer. 5621 * Since buffer objects must be reference counted in the kernel a buffer object 5622 * won't be immediately freed if a framebuffer modeset object still uses it. 5623 * 5624 * Called by the user via ioctl. 5625 * 5626 * Returns: 5627 * Zero on success, negative errno on failure. 5628 */ 5629 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, 5630 void *data, struct drm_file *file_priv) 5631 { 5632 struct drm_mode_destroy_dumb *args = data; 5633 5634 if (!dev->driver->dumb_destroy) 5635 return -ENOSYS; 5636 5637 return dev->driver->dumb_destroy(file_priv, dev, args->handle); 5638 } 5639 5640 /** 5641 * drm_rotation_simplify() - Try to simplify the rotation 5642 * @rotation: Rotation to be simplified 5643 * @supported_rotations: Supported rotations 5644 * 5645 * Attempt to simplify the rotation to a form that is supported. 5646 * Eg. if the hardware supports everything except DRM_REFLECT_X 5647 * one could call this function like this: 5648 * 5649 * drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) | 5650 * BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_180) | 5651 * BIT(DRM_ROTATE_270) | BIT(DRM_REFLECT_Y)); 5652 * 5653 * to eliminate the DRM_ROTATE_X flag. Depending on what kind of 5654 * transforms the hardware supports, this function may not 5655 * be able to produce a supported transform, so the caller should 5656 * check the result afterwards. 5657 */ 5658 unsigned int drm_rotation_simplify(unsigned int rotation, 5659 unsigned int supported_rotations) 5660 { 5661 if (rotation & ~supported_rotations) { 5662 rotation ^= BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y); 5663 rotation = (rotation & DRM_REFLECT_MASK) | 5664 BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4); 5665 } 5666 5667 return rotation; 5668 } 5669 EXPORT_SYMBOL(drm_rotation_simplify); 5670 5671 /** 5672 * drm_mode_config_init - initialize DRM mode_configuration structure 5673 * @dev: DRM device 5674 * 5675 * Initialize @dev's mode_config structure, used for tracking the graphics 5676 * configuration of @dev. 5677 * 5678 * Since this initializes the modeset locks, no locking is possible. Which is no 5679 * problem, since this should happen single threaded at init time. It is the 5680 * driver's problem to ensure this guarantee. 5681 * 5682 */ 5683 void drm_mode_config_init(struct drm_device *dev) 5684 { 5685 mutex_init(&dev->mode_config.mutex); 5686 drm_modeset_lock_init(&dev->mode_config.connection_mutex); 5687 mutex_init(&dev->mode_config.idr_mutex); 5688 mutex_init(&dev->mode_config.fb_lock); 5689 mutex_init(&dev->mode_config.blob_lock); 5690 INIT_LIST_HEAD(&dev->mode_config.fb_list); 5691 INIT_LIST_HEAD(&dev->mode_config.crtc_list); 5692 INIT_LIST_HEAD(&dev->mode_config.connector_list); 5693 INIT_LIST_HEAD(&dev->mode_config.encoder_list); 5694 INIT_LIST_HEAD(&dev->mode_config.property_list); 5695 INIT_LIST_HEAD(&dev->mode_config.property_blob_list); 5696 INIT_LIST_HEAD(&dev->mode_config.plane_list); 5697 idr_init(&dev->mode_config.crtc_idr); 5698 idr_init(&dev->mode_config.tile_idr); 5699 ida_init(&dev->mode_config.connector_ida); 5700 5701 drm_modeset_lock_all(dev); 5702 drm_mode_create_standard_properties(dev); 5703 drm_modeset_unlock_all(dev); 5704 5705 /* Just to be sure */ 5706 dev->mode_config.num_fb = 0; 5707 dev->mode_config.num_connector = 0; 5708 dev->mode_config.num_crtc = 0; 5709 dev->mode_config.num_encoder = 0; 5710 dev->mode_config.num_overlay_plane = 0; 5711 dev->mode_config.num_total_plane = 0; 5712 } 5713 EXPORT_SYMBOL(drm_mode_config_init); 5714 5715 /** 5716 * drm_mode_config_cleanup - free up DRM mode_config info 5717 * @dev: DRM device 5718 * 5719 * Free up all the connectors and CRTCs associated with this DRM device, then 5720 * free up the framebuffers and associated buffer objects. 5721 * 5722 * Note that since this /should/ happen single-threaded at driver/device 5723 * teardown time, no locking is required. It's the driver's job to ensure that 5724 * this guarantee actually holds true. 5725 * 5726 * FIXME: cleanup any dangling user buffer objects too 5727 */ 5728 void drm_mode_config_cleanup(struct drm_device *dev) 5729 { 5730 struct drm_connector *connector, *ot; 5731 struct drm_crtc *crtc, *ct; 5732 struct drm_encoder *encoder, *enct; 5733 struct drm_framebuffer *fb, *fbt; 5734 struct drm_property *property, *pt; 5735 struct drm_property_blob *blob, *bt; 5736 struct drm_plane *plane, *plt; 5737 5738 list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, 5739 head) { 5740 encoder->funcs->destroy(encoder); 5741 } 5742 5743 list_for_each_entry_safe(connector, ot, 5744 &dev->mode_config.connector_list, head) { 5745 connector->funcs->destroy(connector); 5746 } 5747 5748 list_for_each_entry_safe(property, pt, &dev->mode_config.property_list, 5749 head) { 5750 drm_property_destroy(dev, property); 5751 } 5752 5753 list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list, 5754 head) { 5755 plane->funcs->destroy(plane); 5756 } 5757 5758 list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) { 5759 crtc->funcs->destroy(crtc); 5760 } 5761 5762 list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list, 5763 head_global) { 5764 drm_property_unreference_blob(blob); 5765 } 5766 5767 /* 5768 * Single-threaded teardown context, so it's not required to grab the 5769 * fb_lock to protect against concurrent fb_list access. Contrary, it 5770 * would actually deadlock with the drm_framebuffer_cleanup function. 5771 * 5772 * Also, if there are any framebuffers left, that's a driver leak now, 5773 * so politely WARN about this. 5774 */ 5775 WARN_ON(!list_empty(&dev->mode_config.fb_list)); 5776 list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) { 5777 drm_framebuffer_free(&fb->base.refcount); 5778 } 5779 5780 ida_destroy(&dev->mode_config.connector_ida); 5781 idr_destroy(&dev->mode_config.tile_idr); 5782 idr_destroy(&dev->mode_config.crtc_idr); 5783 drm_modeset_lock_fini(&dev->mode_config.connection_mutex); 5784 } 5785 EXPORT_SYMBOL(drm_mode_config_cleanup); 5786 5787 struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev, 5788 unsigned int supported_rotations) 5789 { 5790 static const struct drm_prop_enum_list props[] = { 5791 { DRM_ROTATE_0, "rotate-0" }, 5792 { DRM_ROTATE_90, "rotate-90" }, 5793 { DRM_ROTATE_180, "rotate-180" }, 5794 { DRM_ROTATE_270, "rotate-270" }, 5795 { DRM_REFLECT_X, "reflect-x" }, 5796 { DRM_REFLECT_Y, "reflect-y" }, 5797 }; 5798 5799 return drm_property_create_bitmask(dev, 0, "rotation", 5800 props, ARRAY_SIZE(props), 5801 supported_rotations); 5802 } 5803 EXPORT_SYMBOL(drm_mode_create_rotation_property); 5804 5805 /** 5806 * DOC: Tile group 5807 * 5808 * Tile groups are used to represent tiled monitors with a unique 5809 * integer identifier. Tiled monitors using DisplayID v1.3 have 5810 * a unique 8-byte handle, we store this in a tile group, so we 5811 * have a common identifier for all tiles in a monitor group. 5812 */ 5813 static void drm_tile_group_free(struct kref *kref) 5814 { 5815 struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount); 5816 struct drm_device *dev = tg->dev; 5817 mutex_lock(&dev->mode_config.idr_mutex); 5818 idr_remove(&dev->mode_config.tile_idr, tg->id); 5819 mutex_unlock(&dev->mode_config.idr_mutex); 5820 kfree(tg); 5821 } 5822 5823 /** 5824 * drm_mode_put_tile_group - drop a reference to a tile group. 5825 * @dev: DRM device 5826 * @tg: tile group to drop reference to. 5827 * 5828 * drop reference to tile group and free if 0. 5829 */ 5830 void drm_mode_put_tile_group(struct drm_device *dev, 5831 struct drm_tile_group *tg) 5832 { 5833 kref_put(&tg->refcount, drm_tile_group_free); 5834 } 5835 5836 /** 5837 * drm_mode_get_tile_group - get a reference to an existing tile group 5838 * @dev: DRM device 5839 * @topology: 8-bytes unique per monitor. 5840 * 5841 * Use the unique bytes to get a reference to an existing tile group. 5842 * 5843 * RETURNS: 5844 * tile group or NULL if not found. 5845 */ 5846 struct drm_tile_group *drm_mode_get_tile_group(struct drm_device *dev, 5847 char topology[8]) 5848 { 5849 struct drm_tile_group *tg; 5850 int id; 5851 mutex_lock(&dev->mode_config.idr_mutex); 5852 idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) { 5853 if (!memcmp(tg->group_data, topology, 8)) { 5854 if (!kref_get_unless_zero(&tg->refcount)) 5855 tg = NULL; 5856 mutex_unlock(&dev->mode_config.idr_mutex); 5857 return tg; 5858 } 5859 } 5860 mutex_unlock(&dev->mode_config.idr_mutex); 5861 return NULL; 5862 } 5863 EXPORT_SYMBOL(drm_mode_get_tile_group); 5864 5865 /** 5866 * drm_mode_create_tile_group - create a tile group from a displayid description 5867 * @dev: DRM device 5868 * @topology: 8-bytes unique per monitor. 5869 * 5870 * Create a tile group for the unique monitor, and get a unique 5871 * identifier for the tile group. 5872 * 5873 * RETURNS: 5874 * new tile group or error. 5875 */ 5876 struct drm_tile_group *drm_mode_create_tile_group(struct drm_device *dev, 5877 char topology[8]) 5878 { 5879 struct drm_tile_group *tg; 5880 int ret; 5881 5882 tg = kzalloc(sizeof(*tg), GFP_KERNEL); 5883 if (!tg) 5884 return ERR_PTR(-ENOMEM); 5885 5886 kref_init(&tg->refcount); 5887 memcpy(tg->group_data, topology, 8); 5888 tg->dev = dev; 5889 5890 mutex_lock(&dev->mode_config.idr_mutex); 5891 ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL); 5892 if (ret >= 0) { 5893 tg->id = ret; 5894 } else { 5895 kfree(tg); 5896 tg = ERR_PTR(ret); 5897 } 5898 5899 mutex_unlock(&dev->mode_config.idr_mutex); 5900 return tg; 5901 } 5902 EXPORT_SYMBOL(drm_mode_create_tile_group); 5903 5904 /** 5905 * drm_crtc_enable_color_mgmt - enable color management properties 5906 * @crtc: DRM CRTC 5907 * @degamma_lut_size: the size of the degamma lut (before CSC) 5908 * @has_ctm: whether to attach ctm_property for CSC matrix 5909 * @gamma_lut_size: the size of the gamma lut (after CSC) 5910 * 5911 * This function lets the driver enable the color correction 5912 * properties on a CRTC. This includes 3 degamma, csc and gamma 5913 * properties that userspace can set and 2 size properties to inform 5914 * the userspace of the lut sizes. Each of the properties are 5915 * optional. The gamma and degamma properties are only attached if 5916 * their size is not 0 and ctm_property is only attached if has_ctm is 5917 * true. 5918 */ 5919 void drm_crtc_enable_color_mgmt(struct drm_crtc *crtc, 5920 uint degamma_lut_size, 5921 bool has_ctm, 5922 uint gamma_lut_size) 5923 { 5924 struct drm_device *dev = crtc->dev; 5925 struct drm_mode_config *config = &dev->mode_config; 5926 5927 if (degamma_lut_size) { 5928 drm_object_attach_property(&crtc->base, 5929 config->degamma_lut_property, 0); 5930 drm_object_attach_property(&crtc->base, 5931 config->degamma_lut_size_property, 5932 degamma_lut_size); 5933 } 5934 5935 if (has_ctm) 5936 drm_object_attach_property(&crtc->base, 5937 config->ctm_property, 0); 5938 5939 if (gamma_lut_size) { 5940 drm_object_attach_property(&crtc->base, 5941 config->gamma_lut_property, 0); 5942 drm_object_attach_property(&crtc->base, 5943 config->gamma_lut_size_property, 5944 gamma_lut_size); 5945 } 5946 } 5947 EXPORT_SYMBOL(drm_crtc_enable_color_mgmt); 5948