1 /* 2 * Copyright © 2006 Keith Packard 3 * Copyright © 2007-2008 Dave Airlie 4 * Copyright © 2007-2008 Intel Corporation 5 * Jesse Barnes <jesse.barnes@intel.com> 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 23 * OTHER DEALINGS IN THE SOFTWARE. 24 */ 25 #ifndef __DRM_CRTC_H__ 26 #define __DRM_CRTC_H__ 27 28 #include <linux/spinlock.h> 29 #include <linux/types.h> 30 #include <drm/drm_modeset_lock.h> 31 #include <drm/drm_mode_object.h> 32 #include <drm/drm_modes.h> 33 #include <drm/drm_device.h> 34 #include <drm/drm_plane.h> 35 #include <drm/drm_debugfs_crc.h> 36 #include <drm/drm_mode_config.h> 37 38 struct drm_connector; 39 struct drm_device; 40 struct drm_framebuffer; 41 struct drm_mode_set; 42 struct drm_file; 43 struct drm_printer; 44 struct drm_self_refresh_data; 45 struct device_node; 46 struct edid; 47 48 static inline int64_t U642I64(uint64_t val) 49 { 50 return (int64_t)*((int64_t *)&val); 51 } 52 static inline uint64_t I642U64(int64_t val) 53 { 54 return (uint64_t)*((uint64_t *)&val); 55 } 56 57 struct drm_crtc; 58 struct drm_pending_vblank_event; 59 struct drm_plane; 60 struct drm_bridge; 61 struct drm_atomic_state; 62 63 struct drm_crtc_helper_funcs; 64 struct drm_plane_helper_funcs; 65 66 /** 67 * struct drm_crtc_state - mutable CRTC state 68 * 69 * Note that the distinction between @enable and @active is rather subtle: 70 * Flipping @active while @enable is set without changing anything else may 71 * never return in a failure from the &drm_mode_config_funcs.atomic_check 72 * callback. Userspace assumes that a DPMS On will always succeed. In other 73 * words: @enable controls resource assignment, @active controls the actual 74 * hardware state. 75 * 76 * The three booleans active_changed, connectors_changed and mode_changed are 77 * intended to indicate whether a full modeset is needed, rather than strictly 78 * describing what has changed in a commit. See also: 79 * drm_atomic_crtc_needs_modeset() 80 */ 81 struct drm_crtc_state { 82 /** @crtc: backpointer to the CRTC */ 83 struct drm_crtc *crtc; 84 85 /** 86 * @enable: Whether the CRTC should be enabled, gates all other state. 87 * This controls reservations of shared resources. Actual hardware state 88 * is controlled by @active. 89 */ 90 bool enable; 91 92 /** 93 * @active: Whether the CRTC is actively displaying (used for DPMS). 94 * Implies that @enable is set. The driver must not release any shared 95 * resources if @active is set to false but @enable still true, because 96 * userspace expects that a DPMS ON always succeeds. 97 * 98 * Hence drivers must not consult @active in their various 99 * &drm_mode_config_funcs.atomic_check callback to reject an atomic 100 * commit. They can consult it to aid in the computation of derived 101 * hardware state, since even in the DPMS OFF state the display hardware 102 * should be as much powered down as when the CRTC is completely 103 * disabled through setting @enable to false. 104 */ 105 bool active; 106 107 /** 108 * @planes_changed: Planes on this crtc are updated. Used by the atomic 109 * helpers and drivers to steer the atomic commit control flow. 110 */ 111 bool planes_changed : 1; 112 113 /** 114 * @mode_changed: @mode or @enable has been changed. Used by the atomic 115 * helpers and drivers to steer the atomic commit control flow. See also 116 * drm_atomic_crtc_needs_modeset(). 117 * 118 * Drivers are supposed to set this for any CRTC state changes that 119 * require a full modeset. They can also reset it to false if e.g. a 120 * @mode change can be done without a full modeset by only changing 121 * scaler settings. 122 */ 123 bool mode_changed : 1; 124 125 /** 126 * @active_changed: @active has been toggled. Used by the atomic 127 * helpers and drivers to steer the atomic commit control flow. See also 128 * drm_atomic_crtc_needs_modeset(). 129 */ 130 bool active_changed : 1; 131 132 /** 133 * @connectors_changed: Connectors to this crtc have been updated, 134 * either in their state or routing. Used by the atomic 135 * helpers and drivers to steer the atomic commit control flow. See also 136 * drm_atomic_crtc_needs_modeset(). 137 * 138 * Drivers are supposed to set this as-needed from their own atomic 139 * check code, e.g. from &drm_encoder_helper_funcs.atomic_check 140 */ 141 bool connectors_changed : 1; 142 /** 143 * @zpos_changed: zpos values of planes on this crtc have been updated. 144 * Used by the atomic helpers and drivers to steer the atomic commit 145 * control flow. 146 */ 147 bool zpos_changed : 1; 148 /** 149 * @color_mgmt_changed: Color management properties have changed 150 * (@gamma_lut, @degamma_lut or @ctm). Used by the atomic helpers and 151 * drivers to steer the atomic commit control flow. 152 */ 153 bool color_mgmt_changed : 1; 154 155 /** 156 * @no_vblank: 157 * 158 * Reflects the ability of a CRTC to send VBLANK events. This state 159 * usually depends on the pipeline configuration. If set to true, DRM 160 * atomic helpers will send out a fake VBLANK event during display 161 * updates after all hardware changes have been committed. This is 162 * implemented in drm_atomic_helper_fake_vblank(). 163 * 164 * One usage is for drivers and/or hardware without support for VBLANK 165 * interrupts. Such drivers typically do not initialize vblanking 166 * (i.e., call drm_vblank_init() with the number of CRTCs). For CRTCs 167 * without initialized vblanking, this field is set to true in 168 * drm_atomic_helper_check_modeset(), and a fake VBLANK event will be 169 * send out on each update of the display pipeline by 170 * drm_atomic_helper_fake_vblank(). 171 * 172 * Another usage is CRTCs feeding a writeback connector operating in 173 * oneshot mode. In this case the fake VBLANK event is only generated 174 * when a job is queued to the writeback connector, and we want the 175 * core to fake VBLANK events when this part of the pipeline hasn't 176 * changed but others had or when the CRTC and connectors are being 177 * disabled. 178 * 179 * __drm_atomic_helper_crtc_duplicate_state() will not reset the value 180 * from the current state, the CRTC driver is then responsible for 181 * updating this field when needed. 182 * 183 * Note that the combination of &drm_crtc_state.event == NULL and 184 * &drm_crtc_state.no_blank == true is valid and usually used when the 185 * writeback connector attached to the CRTC has a new job queued. In 186 * this case the driver will send the VBLANK event on its own when the 187 * writeback job is complete. 188 */ 189 bool no_vblank; 190 191 /** 192 * @plane_mask: Bitmask of drm_plane_mask(plane) of planes attached to 193 * this CRTC. 194 */ 195 u32 plane_mask; 196 197 /** 198 * @connector_mask: Bitmask of drm_connector_mask(connector) of 199 * connectors attached to this CRTC. 200 */ 201 u32 connector_mask; 202 203 /** 204 * @encoder_mask: Bitmask of drm_encoder_mask(encoder) of encoders 205 * attached to this CRTC. 206 */ 207 u32 encoder_mask; 208 209 /** 210 * @adjusted_mode: 211 * 212 * Internal display timings which can be used by the driver to handle 213 * differences between the mode requested by userspace in @mode and what 214 * is actually programmed into the hardware. 215 * 216 * For drivers using &drm_bridge, this stores hardware display timings 217 * used between the CRTC and the first bridge. For other drivers, the 218 * meaning of the adjusted_mode field is purely driver implementation 219 * defined information, and will usually be used to store the hardware 220 * display timings used between the CRTC and encoder blocks. 221 */ 222 struct drm_display_mode adjusted_mode; 223 224 /** 225 * @mode: 226 * 227 * Display timings requested by userspace. The driver should try to 228 * match the refresh rate as close as possible (but note that it's 229 * undefined what exactly is close enough, e.g. some of the HDMI modes 230 * only differ in less than 1% of the refresh rate). The active width 231 * and height as observed by userspace for positioning planes must match 232 * exactly. 233 * 234 * For external connectors where the sink isn't fixed (like with a 235 * built-in panel), this mode here should match the physical mode on the 236 * wire to the last details (i.e. including sync polarities and 237 * everything). 238 */ 239 struct drm_display_mode mode; 240 241 /** 242 * @mode_blob: &drm_property_blob for @mode, for exposing the mode to 243 * atomic userspace. 244 */ 245 struct drm_property_blob *mode_blob; 246 247 /** 248 * @degamma_lut: 249 * 250 * Lookup table for converting framebuffer pixel data before apply the 251 * color conversion matrix @ctm. See drm_crtc_enable_color_mgmt(). The 252 * blob (if not NULL) is an array of &struct drm_color_lut. 253 */ 254 struct drm_property_blob *degamma_lut; 255 256 /** 257 * @ctm: 258 * 259 * Color transformation matrix. See drm_crtc_enable_color_mgmt(). The 260 * blob (if not NULL) is a &struct drm_color_ctm. 261 */ 262 struct drm_property_blob *ctm; 263 264 /** 265 * @gamma_lut: 266 * 267 * Lookup table for converting pixel data after the color conversion 268 * matrix @ctm. See drm_crtc_enable_color_mgmt(). The blob (if not 269 * NULL) is an array of &struct drm_color_lut. 270 * 271 * Note that for mostly historical reasons stemming from Xorg heritage, 272 * this is also used to store the color map (also sometimes color lut, 273 * CLUT or color palette) for indexed formats like DRM_FORMAT_C8. 274 */ 275 struct drm_property_blob *gamma_lut; 276 277 /** 278 * @target_vblank: 279 * 280 * Target vertical blank period when a page flip 281 * should take effect. 282 */ 283 u32 target_vblank; 284 285 /** 286 * @async_flip: 287 * 288 * This is set when DRM_MODE_PAGE_FLIP_ASYNC is set in the legacy 289 * PAGE_FLIP IOCTL. It's not wired up for the atomic IOCTL itself yet. 290 */ 291 bool async_flip; 292 293 /** 294 * @vrr_enabled: 295 * 296 * Indicates if variable refresh rate should be enabled for the CRTC. 297 * Support for the requested vrr state will depend on driver and 298 * hardware capabiltiy - lacking support is not treated as failure. 299 */ 300 bool vrr_enabled; 301 302 /** 303 * @self_refresh_active: 304 * 305 * Used by the self refresh helpers to denote when a self refresh 306 * transition is occurring. This will be set on enable/disable callbacks 307 * when self refresh is being enabled or disabled. In some cases, it may 308 * not be desirable to fully shut off the crtc during self refresh. 309 * CRTC's can inspect this flag and determine the best course of action. 310 */ 311 bool self_refresh_active; 312 313 /** 314 * @scaling_filter: 315 * 316 * Scaling filter to be applied 317 */ 318 enum drm_scaling_filter scaling_filter; 319 320 /** 321 * @sharpness_strength: 322 * 323 * Used by the user to set the sharpness intensity. 324 * The value ranges from 0-255. 325 * Default value is 0 which disable the sharpness feature. 326 * Any value greater than 0 enables sharpening with the 327 * specified strength. 328 */ 329 u8 sharpness_strength; 330 331 /** 332 * @event: 333 * 334 * Optional pointer to a DRM event to signal upon completion of the 335 * state update. The driver must send out the event when the atomic 336 * commit operation completes. There are two cases: 337 * 338 * - The event is for a CRTC which is being disabled through this 339 * atomic commit. In that case the event can be send out any time 340 * after the hardware has stopped scanning out the current 341 * framebuffers. It should contain the timestamp and counter for the 342 * last vblank before the display pipeline was shut off. The simplest 343 * way to achieve that is calling drm_crtc_send_vblank_event() 344 * somewhen after drm_crtc_vblank_off() has been called. 345 * 346 * - For a CRTC which is enabled at the end of the commit (even when it 347 * undergoes an full modeset) the vblank timestamp and counter must 348 * be for the vblank right before the first frame that scans out the 349 * new set of buffers. Again the event can only be sent out after the 350 * hardware has stopped scanning out the old buffers. 351 * 352 * - Events for disabled CRTCs are not allowed, and drivers can ignore 353 * that case. 354 * 355 * For very simple hardware without VBLANK interrupt, enabling 356 * &struct drm_crtc_state.no_vblank makes DRM's atomic commit helpers 357 * send a fake VBLANK event at the end of the display update after all 358 * hardware changes have been applied. See 359 * drm_atomic_helper_fake_vblank(). 360 * 361 * For more complex hardware this 362 * can be handled by the drm_crtc_send_vblank_event() function, 363 * which the driver should call on the provided event upon completion of 364 * the atomic commit. Note that if the driver supports vblank signalling 365 * and timestamping the vblank counters and timestamps must agree with 366 * the ones returned from page flip events. With the current vblank 367 * helper infrastructure this can be achieved by holding a vblank 368 * reference while the page flip is pending, acquired through 369 * drm_crtc_vblank_get() and released with drm_crtc_vblank_put(). 370 * Drivers are free to implement their own vblank counter and timestamp 371 * tracking though, e.g. if they have accurate timestamp registers in 372 * hardware. 373 * 374 * For hardware which supports some means to synchronize vblank 375 * interrupt delivery with committing display state there's also 376 * drm_crtc_arm_vblank_event(). See the documentation of that function 377 * for a detailed discussion of the constraints it needs to be used 378 * safely. 379 * 380 * If the device can't notify of flip completion in a race-free way 381 * at all, then the event should be armed just after the page flip is 382 * committed. In the worst case the driver will send the event to 383 * userspace one frame too late. This doesn't allow for a real atomic 384 * update, but it should avoid tearing. 385 */ 386 struct drm_pending_vblank_event *event; 387 388 /** 389 * @commit: 390 * 391 * This tracks how the commit for this update proceeds through the 392 * various phases. This is never cleared, except when we destroy the 393 * state, so that subsequent commits can synchronize with previous ones. 394 */ 395 struct drm_crtc_commit *commit; 396 397 /** @state: backpointer to global drm_atomic_state */ 398 struct drm_atomic_state *state; 399 }; 400 401 /** 402 * struct drm_crtc_funcs - control CRTCs for a given device 403 * 404 * The drm_crtc_funcs structure is the central CRTC management structure 405 * in the DRM. Each CRTC controls one or more connectors (note that the name 406 * CRTC is simply historical, a CRTC may control LVDS, VGA, DVI, TV out, etc. 407 * connectors, not just CRTs). 408 * 409 * Each driver is responsible for filling out this structure at startup time, 410 * in addition to providing other modesetting features, like i2c and DDC 411 * bus accessors. 412 */ 413 struct drm_crtc_funcs { 414 /** 415 * @reset: 416 * 417 * Reset CRTC hardware and software state to off. This function isn't 418 * called by the core directly, only through drm_mode_config_reset(). 419 * It's not a helper hook only for historical reasons. 420 * 421 * Atomic drivers can use drm_atomic_helper_crtc_reset() to reset 422 * atomic state using this hook. 423 */ 424 void (*reset)(struct drm_crtc *crtc); 425 426 /** 427 * @cursor_set: 428 * 429 * Update the cursor image. The cursor position is relative to the CRTC 430 * and can be partially or fully outside of the visible area. 431 * 432 * Note that contrary to all other KMS functions the legacy cursor entry 433 * points don't take a framebuffer object, but instead take directly a 434 * raw buffer object id from the driver's buffer manager (which is 435 * either GEM or TTM for current drivers). 436 * 437 * This entry point is deprecated, drivers should instead implement 438 * universal plane support and register a proper cursor plane using 439 * drm_crtc_init_with_planes(). 440 * 441 * This callback is optional 442 * 443 * RETURNS: 444 * 445 * 0 on success or a negative error code on failure. 446 */ 447 int (*cursor_set)(struct drm_crtc *crtc, struct drm_file *file_priv, 448 uint32_t handle, uint32_t width, uint32_t height); 449 450 /** 451 * @cursor_set2: 452 * 453 * Update the cursor image, including hotspot information. The hotspot 454 * must not affect the cursor position in CRTC coordinates, but is only 455 * meant as a hint for virtualized display hardware to coordinate the 456 * guests and hosts cursor position. The cursor hotspot is relative to 457 * the cursor image. Otherwise this works exactly like @cursor_set. 458 * 459 * This entry point is deprecated, drivers should instead implement 460 * universal plane support and register a proper cursor plane using 461 * drm_crtc_init_with_planes(). 462 * 463 * This callback is optional. 464 * 465 * RETURNS: 466 * 467 * 0 on success or a negative error code on failure. 468 */ 469 int (*cursor_set2)(struct drm_crtc *crtc, struct drm_file *file_priv, 470 uint32_t handle, uint32_t width, uint32_t height, 471 int32_t hot_x, int32_t hot_y); 472 473 /** 474 * @cursor_move: 475 * 476 * Update the cursor position. The cursor does not need to be visible 477 * when this hook is called. 478 * 479 * This entry point is deprecated, drivers should instead implement 480 * universal plane support and register a proper cursor plane using 481 * drm_crtc_init_with_planes(). 482 * 483 * This callback is optional. 484 * 485 * RETURNS: 486 * 487 * 0 on success or a negative error code on failure. 488 */ 489 int (*cursor_move)(struct drm_crtc *crtc, int x, int y); 490 491 /** 492 * @gamma_set: 493 * 494 * Set gamma on the CRTC. 495 * 496 * This callback is optional. 497 * 498 * Atomic drivers who want to support gamma tables should implement the 499 * atomic color management support, enabled by calling 500 * drm_crtc_enable_color_mgmt(), which then supports the legacy gamma 501 * interface through the drm_atomic_helper_legacy_gamma_set() 502 * compatibility implementation. 503 */ 504 int (*gamma_set)(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b, 505 uint32_t size, 506 struct drm_modeset_acquire_ctx *ctx); 507 508 /** 509 * @destroy: 510 * 511 * Clean up CRTC resources. This is only called at driver unload time 512 * through drm_mode_config_cleanup() since a CRTC cannot be hotplugged 513 * in DRM. 514 */ 515 void (*destroy)(struct drm_crtc *crtc); 516 517 /** 518 * @set_config: 519 * 520 * This is the main legacy entry point to change the modeset state on a 521 * CRTC. All the details of the desired configuration are passed in a 522 * &struct drm_mode_set - see there for details. 523 * 524 * Drivers implementing atomic modeset should use 525 * drm_atomic_helper_set_config() to implement this hook. 526 * 527 * RETURNS: 528 * 529 * 0 on success or a negative error code on failure. 530 */ 531 int (*set_config)(struct drm_mode_set *set, 532 struct drm_modeset_acquire_ctx *ctx); 533 534 /** 535 * @page_flip: 536 * 537 * Legacy entry point to schedule a flip to the given framebuffer. 538 * 539 * Page flipping is a synchronization mechanism that replaces the frame 540 * buffer being scanned out by the CRTC with a new frame buffer during 541 * vertical blanking, avoiding tearing (except when requested otherwise 542 * through the DRM_MODE_PAGE_FLIP_ASYNC flag). When an application 543 * requests a page flip the DRM core verifies that the new frame buffer 544 * is large enough to be scanned out by the CRTC in the currently 545 * configured mode and then calls this hook with a pointer to the new 546 * frame buffer. 547 * 548 * The driver must wait for any pending rendering to the new framebuffer 549 * to complete before executing the flip. It should also wait for any 550 * pending rendering from other drivers if the underlying buffer is a 551 * shared dma-buf. 552 * 553 * An application can request to be notified when the page flip has 554 * completed. The drm core will supply a &struct drm_event in the event 555 * parameter in this case. This can be handled by the 556 * drm_crtc_send_vblank_event() function, which the driver should call on 557 * the provided event upon completion of the flip. Note that if 558 * the driver supports vblank signalling and timestamping the vblank 559 * counters and timestamps must agree with the ones returned from page 560 * flip events. With the current vblank helper infrastructure this can 561 * be achieved by holding a vblank reference while the page flip is 562 * pending, acquired through drm_crtc_vblank_get() and released with 563 * drm_crtc_vblank_put(). Drivers are free to implement their own vblank 564 * counter and timestamp tracking though, e.g. if they have accurate 565 * timestamp registers in hardware. 566 * 567 * This callback is optional. 568 * 569 * NOTE: 570 * 571 * Very early versions of the KMS ABI mandated that the driver must 572 * block (but not reject) any rendering to the old framebuffer until the 573 * flip operation has completed and the old framebuffer is no longer 574 * visible. This requirement has been lifted, and userspace is instead 575 * expected to request delivery of an event and wait with recycling old 576 * buffers until such has been received. 577 * 578 * RETURNS: 579 * 580 * 0 on success or a negative error code on failure. Note that if a 581 * page flip operation is already pending the callback should return 582 * -EBUSY. Pageflips on a disabled CRTC (either by setting a NULL mode 583 * or just runtime disabled through DPMS respectively the new atomic 584 * "ACTIVE" state) should result in an -EINVAL error code. Note that 585 * drm_atomic_helper_page_flip() checks this already for atomic drivers. 586 */ 587 int (*page_flip)(struct drm_crtc *crtc, 588 struct drm_framebuffer *fb, 589 struct drm_pending_vblank_event *event, 590 uint32_t flags, 591 struct drm_modeset_acquire_ctx *ctx); 592 593 /** 594 * @page_flip_target: 595 * 596 * Same as @page_flip but with an additional parameter specifying the 597 * absolute target vertical blank period (as reported by 598 * drm_crtc_vblank_count()) when the flip should take effect. 599 * 600 * Note that the core code calls drm_crtc_vblank_get before this entry 601 * point, and will call drm_crtc_vblank_put if this entry point returns 602 * any non-0 error code. It's the driver's responsibility to call 603 * drm_crtc_vblank_put after this entry point returns 0, typically when 604 * the flip completes. 605 */ 606 int (*page_flip_target)(struct drm_crtc *crtc, 607 struct drm_framebuffer *fb, 608 struct drm_pending_vblank_event *event, 609 uint32_t flags, uint32_t target, 610 struct drm_modeset_acquire_ctx *ctx); 611 612 /** 613 * @set_property: 614 * 615 * This is the legacy entry point to update a property attached to the 616 * CRTC. 617 * 618 * This callback is optional if the driver does not support any legacy 619 * driver-private properties. For atomic drivers it is not used because 620 * property handling is done entirely in the DRM core. 621 * 622 * RETURNS: 623 * 624 * 0 on success or a negative error code on failure. 625 */ 626 int (*set_property)(struct drm_crtc *crtc, 627 struct drm_property *property, uint64_t val); 628 629 /** 630 * @atomic_duplicate_state: 631 * 632 * Duplicate the current atomic state for this CRTC and return it. 633 * The core and helpers guarantee that any atomic state duplicated with 634 * this hook and still owned by the caller (i.e. not transferred to the 635 * driver by calling &drm_mode_config_funcs.atomic_commit) will be 636 * cleaned up by calling the @atomic_destroy_state hook in this 637 * structure. 638 * 639 * This callback is mandatory for atomic drivers. 640 * 641 * Atomic drivers which don't subclass &struct drm_crtc_state should use 642 * drm_atomic_helper_crtc_duplicate_state(). Drivers that subclass the 643 * state structure to extend it with driver-private state should use 644 * __drm_atomic_helper_crtc_duplicate_state() to make sure shared state is 645 * duplicated in a consistent fashion across drivers. 646 * 647 * It is an error to call this hook before &drm_crtc.state has been 648 * initialized correctly. 649 * 650 * NOTE: 651 * 652 * If the duplicate state references refcounted resources this hook must 653 * acquire a reference for each of them. The driver must release these 654 * references again in @atomic_destroy_state. 655 * 656 * RETURNS: 657 * 658 * Duplicated atomic state or NULL when the allocation failed. 659 */ 660 struct drm_crtc_state *(*atomic_duplicate_state)(struct drm_crtc *crtc); 661 662 /** 663 * @atomic_destroy_state: 664 * 665 * Destroy a state duplicated with @atomic_duplicate_state and release 666 * or unreference all resources it references 667 * 668 * This callback is mandatory for atomic drivers. 669 */ 670 void (*atomic_destroy_state)(struct drm_crtc *crtc, 671 struct drm_crtc_state *state); 672 673 /** 674 * @atomic_set_property: 675 * 676 * Decode a driver-private property value and store the decoded value 677 * into the passed-in state structure. Since the atomic core decodes all 678 * standardized properties (even for extensions beyond the core set of 679 * properties which might not be implemented by all drivers) this 680 * requires drivers to subclass the state structure. 681 * 682 * Such driver-private properties should really only be implemented for 683 * truly hardware/vendor specific state. Instead it is preferred to 684 * standardize atomic extension and decode the properties used to expose 685 * such an extension in the core. 686 * 687 * Do not call this function directly, use 688 * drm_atomic_crtc_set_property() instead. 689 * 690 * This callback is optional if the driver does not support any 691 * driver-private atomic properties. 692 * 693 * NOTE: 694 * 695 * This function is called in the state assembly phase of atomic 696 * modesets, which can be aborted for any reason (including on 697 * userspace's request to just check whether a configuration would be 698 * possible). Drivers MUST NOT touch any persistent state (hardware or 699 * software) or data structures except the passed in @state parameter. 700 * 701 * Also since userspace controls in which order properties are set this 702 * function must not do any input validation (since the state update is 703 * incomplete and hence likely inconsistent). Instead any such input 704 * validation must be done in the various atomic_check callbacks. 705 * 706 * RETURNS: 707 * 708 * 0 if the property has been found, -EINVAL if the property isn't 709 * implemented by the driver (which should never happen, the core only 710 * asks for properties attached to this CRTC). No other validation is 711 * allowed by the driver. The core already checks that the property 712 * value is within the range (integer, valid enum value, ...) the driver 713 * set when registering the property. 714 */ 715 int (*atomic_set_property)(struct drm_crtc *crtc, 716 struct drm_crtc_state *state, 717 struct drm_property *property, 718 uint64_t val); 719 /** 720 * @atomic_get_property: 721 * 722 * Reads out the decoded driver-private property. This is used to 723 * implement the GETCRTC IOCTL. 724 * 725 * Do not call this function directly, use 726 * drm_atomic_crtc_get_property() instead. 727 * 728 * This callback is optional if the driver does not support any 729 * driver-private atomic properties. 730 * 731 * RETURNS: 732 * 733 * 0 on success, -EINVAL if the property isn't implemented by the 734 * driver (which should never happen, the core only asks for 735 * properties attached to this CRTC). 736 */ 737 int (*atomic_get_property)(struct drm_crtc *crtc, 738 const struct drm_crtc_state *state, 739 struct drm_property *property, 740 uint64_t *val); 741 742 /** 743 * @late_register: 744 * 745 * This optional hook can be used to register additional userspace 746 * interfaces attached to the crtc like debugfs interfaces. 747 * It is called late in the driver load sequence from drm_dev_register(). 748 * Everything added from this callback should be unregistered in 749 * the early_unregister callback. 750 * 751 * Returns: 752 * 753 * 0 on success, or a negative error code on failure. 754 */ 755 int (*late_register)(struct drm_crtc *crtc); 756 757 /** 758 * @early_unregister: 759 * 760 * This optional hook should be used to unregister the additional 761 * userspace interfaces attached to the crtc from 762 * @late_register. It is called from drm_dev_unregister(), 763 * early in the driver unload sequence to disable userspace access 764 * before data structures are torndown. 765 */ 766 void (*early_unregister)(struct drm_crtc *crtc); 767 768 /** 769 * @set_crc_source: 770 * 771 * Changes the source of CRC checksums of frames at the request of 772 * userspace, typically for testing purposes. The sources available are 773 * specific of each driver and a %NULL value indicates that CRC 774 * generation is to be switched off. 775 * 776 * When CRC generation is enabled, the driver should call 777 * drm_crtc_add_crc_entry() at each frame, providing any information 778 * that characterizes the frame contents in the crcN arguments, as 779 * provided from the configured source. Drivers must accept an "auto" 780 * source name that will select a default source for this CRTC. 781 * 782 * This may trigger an atomic modeset commit if necessary, to enable CRC 783 * generation. 784 * 785 * Note that "auto" can depend upon the current modeset configuration, 786 * e.g. it could pick an encoder or output specific CRC sampling point. 787 * 788 * This callback is optional if the driver does not support any CRC 789 * generation functionality. 790 * 791 * RETURNS: 792 * 793 * 0 on success or a negative error code on failure. 794 */ 795 int (*set_crc_source)(struct drm_crtc *crtc, const char *source); 796 797 /** 798 * @verify_crc_source: 799 * 800 * verifies the source of CRC checksums of frames before setting the 801 * source for CRC and during crc open. Source parameter can be NULL 802 * while disabling crc source. 803 * 804 * This callback is optional if the driver does not support any CRC 805 * generation functionality. 806 * 807 * RETURNS: 808 * 809 * 0 on success or a negative error code on failure. 810 */ 811 int (*verify_crc_source)(struct drm_crtc *crtc, const char *source, 812 size_t *values_cnt); 813 /** 814 * @get_crc_sources: 815 * 816 * Driver callback for getting a list of all the available sources for 817 * CRC generation. This callback depends upon verify_crc_source, So 818 * verify_crc_source callback should be implemented before implementing 819 * this. Driver can pass full list of available crc sources, this 820 * callback does the verification on each crc-source before passing it 821 * to userspace. 822 * 823 * This callback is optional if the driver does not support exporting of 824 * possible CRC sources list. 825 * 826 * RETURNS: 827 * 828 * a constant character pointer to the list of all the available CRC 829 * sources. On failure driver should return NULL. count should be 830 * updated with number of sources in list. if zero we don't process any 831 * source from the list. 832 */ 833 const char *const *(*get_crc_sources)(struct drm_crtc *crtc, 834 size_t *count); 835 836 /** 837 * @atomic_print_state: 838 * 839 * If driver subclasses &struct drm_crtc_state, it should implement 840 * this optional hook for printing additional driver specific state. 841 * 842 * Do not call this directly, use drm_atomic_crtc_print_state() 843 * instead. 844 */ 845 void (*atomic_print_state)(struct drm_printer *p, 846 const struct drm_crtc_state *state); 847 848 /** 849 * @get_vblank_counter: 850 * 851 * Driver callback for fetching a raw hardware vblank counter for the 852 * CRTC. It's meant to be used by new drivers as the replacement of 853 * &drm_driver.get_vblank_counter hook. 854 * 855 * This callback is optional. If a device doesn't have a hardware 856 * counter, the driver can simply leave the hook as NULL. The DRM core 857 * will account for missed vblank events while interrupts where disabled 858 * based on system timestamps. 859 * 860 * Wraparound handling and loss of events due to modesetting is dealt 861 * with in the DRM core code, as long as drivers call 862 * drm_crtc_vblank_off() and drm_crtc_vblank_on() when disabling or 863 * enabling a CRTC. 864 * 865 * See also &drm_device.vblank_disable_immediate and 866 * &drm_device.max_vblank_count. 867 * 868 * Returns: 869 * 870 * Raw vblank counter value. 871 */ 872 u32 (*get_vblank_counter)(struct drm_crtc *crtc); 873 874 /** 875 * @enable_vblank: 876 * 877 * Enable vblank interrupts for the CRTC. It's meant to be used by 878 * new drivers as the replacement of &drm_driver.enable_vblank hook. 879 * 880 * Returns: 881 * 882 * Zero on success, appropriate errno if the vblank interrupt cannot 883 * be enabled. 884 */ 885 int (*enable_vblank)(struct drm_crtc *crtc); 886 887 /** 888 * @disable_vblank: 889 * 890 * Disable vblank interrupts for the CRTC. It's meant to be used by 891 * new drivers as the replacement of &drm_driver.disable_vblank hook. 892 */ 893 void (*disable_vblank)(struct drm_crtc *crtc); 894 895 /** 896 * @get_vblank_timestamp: 897 * 898 * Called by drm_get_last_vbltimestamp(). Should return a precise 899 * timestamp when the most recent vblank interval ended or will end. 900 * 901 * Specifically, the timestamp in @vblank_time should correspond as 902 * closely as possible to the time when the first video scanline of 903 * the video frame after the end of vblank will start scanning out, 904 * the time immediately after end of the vblank interval. If the 905 * @crtc is currently inside vblank, this will be a time in the future. 906 * If the @crtc is currently scanning out a frame, this will be the 907 * past start time of the current scanout. This is meant to adhere 908 * to the OpenML OML_sync_control extension specification. 909 * 910 * Parameters: 911 * 912 * crtc: 913 * CRTC for which timestamp should be returned. 914 * max_error: 915 * Maximum allowable timestamp error in nanoseconds. 916 * Implementation should strive to provide timestamp 917 * with an error of at most max_error nanoseconds. 918 * Returns true upper bound on error for timestamp. 919 * vblank_time: 920 * Target location for returned vblank timestamp. 921 * in_vblank_irq: 922 * True when called from drm_crtc_handle_vblank(). Some drivers 923 * need to apply some workarounds for gpu-specific vblank irq quirks 924 * if flag is set. 925 * 926 * Returns: 927 * 928 * True on success, false on failure, which means the core should 929 * fallback to a simple timestamp taken in drm_crtc_handle_vblank(). 930 */ 931 bool (*get_vblank_timestamp)(struct drm_crtc *crtc, 932 int *max_error, 933 ktime_t *vblank_time, 934 bool in_vblank_irq); 935 }; 936 937 /** 938 * struct drm_crtc - central CRTC control structure 939 * 940 * Each CRTC may have one or more connectors associated with it. This structure 941 * allows the CRTC to be controlled. 942 */ 943 struct drm_crtc { 944 /** @dev: parent DRM device */ 945 struct drm_device *dev; 946 /** @port: OF node used by drm_of_find_possible_crtcs(). */ 947 struct device_node *port; 948 /** 949 * @head: 950 * 951 * List of all CRTCs on @dev, linked from &drm_mode_config.crtc_list. 952 * Invariant over the lifetime of @dev and therefore does not need 953 * locking. 954 */ 955 struct list_head head; 956 957 /** @name: human readable name, can be overwritten by the driver */ 958 char *name; 959 960 /** 961 * @mutex: 962 * 963 * This provides a read lock for the overall CRTC state (mode, dpms 964 * state, ...) and a write lock for everything which can be update 965 * without a full modeset (fb, cursor data, CRTC properties ...). A full 966 * modeset also need to grab &drm_mode_config.connection_mutex. 967 * 968 * For atomic drivers specifically this protects @state. 969 */ 970 struct drm_modeset_lock mutex; 971 972 /** @base: base KMS object for ID tracking etc. */ 973 struct drm_mode_object base; 974 975 /** 976 * @primary: 977 * Primary plane for this CRTC. Note that this is only 978 * relevant for legacy IOCTL, it specifies the plane implicitly used by 979 * the SETCRTC and PAGE_FLIP IOCTLs. It does not have any significance 980 * beyond that. 981 */ 982 struct drm_plane *primary; 983 984 /** 985 * @cursor: 986 * Cursor plane for this CRTC. Note that this is only relevant for 987 * legacy IOCTL, it specifies the plane implicitly used by the SETCURSOR 988 * and SETCURSOR2 IOCTLs. It does not have any significance 989 * beyond that. 990 */ 991 struct drm_plane *cursor; 992 993 /** 994 * @index: Position inside the mode_config.list, can be used as an array 995 * index. It is invariant over the lifetime of the CRTC. 996 */ 997 unsigned index; 998 999 /** 1000 * @cursor_x: Current x position of the cursor, used for universal 1001 * cursor planes because the SETCURSOR IOCTL only can update the 1002 * framebuffer without supplying the coordinates. Drivers should not use 1003 * this directly, atomic drivers should look at &drm_plane_state.crtc_x 1004 * of the cursor plane instead. 1005 */ 1006 int cursor_x; 1007 /** 1008 * @cursor_y: Current y position of the cursor, used for universal 1009 * cursor planes because the SETCURSOR IOCTL only can update the 1010 * framebuffer without supplying the coordinates. Drivers should not use 1011 * this directly, atomic drivers should look at &drm_plane_state.crtc_y 1012 * of the cursor plane instead. 1013 */ 1014 int cursor_y; 1015 1016 /** 1017 * @enabled: 1018 * 1019 * Is this CRTC enabled? Should only be used by legacy drivers, atomic 1020 * drivers should instead consult &drm_crtc_state.enable and 1021 * &drm_crtc_state.active. Atomic drivers can update this by calling 1022 * drm_atomic_helper_update_legacy_modeset_state(). 1023 */ 1024 bool enabled; 1025 1026 /** 1027 * @mode: 1028 * 1029 * Current mode timings. Should only be used by legacy drivers, atomic 1030 * drivers should instead consult &drm_crtc_state.mode. Atomic drivers 1031 * can update this by calling 1032 * drm_atomic_helper_update_legacy_modeset_state(). 1033 */ 1034 struct drm_display_mode mode; 1035 1036 /** 1037 * @hwmode: 1038 * 1039 * Programmed mode in hw, after adjustments for encoders, crtc, panel 1040 * scaling etc. Should only be used by legacy drivers, for high 1041 * precision vblank timestamps in 1042 * drm_crtc_vblank_helper_get_vblank_timestamp(). 1043 * 1044 * Note that atomic drivers should not use this, but instead use 1045 * &drm_crtc_state.adjusted_mode. And for high-precision timestamps 1046 * drm_crtc_vblank_helper_get_vblank_timestamp() used 1047 * &drm_vblank_crtc.hwmode, 1048 * which is filled out by calling drm_calc_timestamping_constants(). 1049 */ 1050 struct drm_display_mode hwmode; 1051 1052 /** 1053 * @x: 1054 * x position on screen. Should only be used by legacy drivers, atomic 1055 * drivers should look at &drm_plane_state.crtc_x of the primary plane 1056 * instead. Updated by calling 1057 * drm_atomic_helper_update_legacy_modeset_state(). 1058 */ 1059 int x; 1060 /** 1061 * @y: 1062 * y position on screen. Should only be used by legacy drivers, atomic 1063 * drivers should look at &drm_plane_state.crtc_y of the primary plane 1064 * instead. Updated by calling 1065 * drm_atomic_helper_update_legacy_modeset_state(). 1066 */ 1067 int y; 1068 1069 /** @funcs: CRTC control functions */ 1070 const struct drm_crtc_funcs *funcs; 1071 1072 /** 1073 * @gamma_size: Size of legacy gamma ramp reported to userspace. Set up 1074 * by calling drm_mode_crtc_set_gamma_size(). 1075 * 1076 * Note that atomic drivers need to instead use 1077 * &drm_crtc_state.gamma_lut. See drm_crtc_enable_color_mgmt(). 1078 */ 1079 uint32_t gamma_size; 1080 1081 /** 1082 * @gamma_store: Gamma ramp values used by the legacy SETGAMMA and 1083 * GETGAMMA IOCTls. Set up by calling drm_mode_crtc_set_gamma_size(). 1084 * 1085 * Note that atomic drivers need to instead use 1086 * &drm_crtc_state.gamma_lut. See drm_crtc_enable_color_mgmt(). 1087 */ 1088 uint16_t *gamma_store; 1089 1090 /** @helper_private: mid-layer private data */ 1091 const struct drm_crtc_helper_funcs *helper_private; 1092 1093 /** @properties: property tracking for this CRTC */ 1094 struct drm_object_properties properties; 1095 1096 /** 1097 * @scaling_filter_property: property to apply a particular filter while 1098 * scaling. 1099 */ 1100 struct drm_property *scaling_filter_property; 1101 1102 /** 1103 * @sharpness_strength_property: property to apply 1104 * the intensity of the sharpness requested. 1105 */ 1106 struct drm_property *sharpness_strength_property; 1107 1108 /** 1109 * @state: 1110 * 1111 * Current atomic state for this CRTC. 1112 * 1113 * This is protected by @mutex. Note that nonblocking atomic commits 1114 * access the current CRTC state without taking locks. Either by going 1115 * through the &struct drm_atomic_state pointers, see 1116 * for_each_oldnew_crtc_in_state(), for_each_old_crtc_in_state() and 1117 * for_each_new_crtc_in_state(). Or through careful ordering of atomic 1118 * commit operations as implemented in the atomic helpers, see 1119 * &struct drm_crtc_commit. 1120 */ 1121 struct drm_crtc_state *state; 1122 1123 /** 1124 * @commit_list: 1125 * 1126 * List of &drm_crtc_commit structures tracking pending commits. 1127 * Protected by @commit_lock. This list holds its own full reference, 1128 * as does the ongoing commit. 1129 * 1130 * "Note that the commit for a state change is also tracked in 1131 * &drm_crtc_state.commit. For accessing the immediately preceding 1132 * commit in an atomic update it is recommended to just use that 1133 * pointer in the old CRTC state, since accessing that doesn't need 1134 * any locking or list-walking. @commit_list should only be used to 1135 * stall for framebuffer cleanup that's signalled through 1136 * &drm_crtc_commit.cleanup_done." 1137 */ 1138 struct list_head commit_list; 1139 1140 /** 1141 * @commit_lock: 1142 * 1143 * Spinlock to protect @commit_list. 1144 */ 1145 spinlock_t commit_lock; 1146 1147 /** 1148 * @debugfs_entry: 1149 * 1150 * Debugfs directory for this CRTC. 1151 */ 1152 struct dentry *debugfs_entry; 1153 1154 /** 1155 * @crc: 1156 * 1157 * Configuration settings of CRC capture. 1158 */ 1159 struct drm_crtc_crc crc; 1160 1161 /** 1162 * @fence_context: 1163 * 1164 * timeline context used for fence operations. 1165 */ 1166 unsigned int fence_context; 1167 1168 /** 1169 * @fence_lock: 1170 * 1171 * spinlock to protect the fences in the fence_context. 1172 */ 1173 spinlock_t fence_lock; 1174 /** 1175 * @fence_seqno: 1176 * 1177 * Seqno variable used as monotonic counter for the fences 1178 * created on the CRTC's timeline. 1179 */ 1180 unsigned long fence_seqno; 1181 1182 /** 1183 * @timeline_name: 1184 * 1185 * The name of the CRTC's fence timeline. 1186 */ 1187 char timeline_name[32]; 1188 1189 /** 1190 * @self_refresh_data: Holds the state for the self refresh helpers 1191 * 1192 * Initialized via drm_self_refresh_helper_init(). 1193 */ 1194 struct drm_self_refresh_data *self_refresh_data; 1195 }; 1196 1197 /** 1198 * struct drm_mode_set - new values for a CRTC config change 1199 * @fb: framebuffer to use for new config 1200 * @crtc: CRTC whose configuration we're about to change 1201 * @mode: mode timings to use 1202 * @x: position of this CRTC relative to @fb 1203 * @y: position of this CRTC relative to @fb 1204 * @connectors: array of connectors to drive with this CRTC if possible 1205 * @num_connectors: size of @connectors array 1206 * 1207 * This represents a modeset configuration for the legacy SETCRTC ioctl and is 1208 * also used internally. Atomic drivers instead use &drm_atomic_state. 1209 */ 1210 struct drm_mode_set { 1211 struct drm_framebuffer *fb; 1212 struct drm_crtc *crtc; 1213 struct drm_display_mode *mode; 1214 1215 uint32_t x; 1216 uint32_t y; 1217 1218 struct drm_connector **connectors; 1219 size_t num_connectors; 1220 }; 1221 1222 #define obj_to_crtc(x) container_of(x, struct drm_crtc, base) 1223 1224 __printf(6, 7) 1225 int drm_crtc_init_with_planes(struct drm_device *dev, 1226 struct drm_crtc *crtc, 1227 struct drm_plane *primary, 1228 struct drm_plane *cursor, 1229 const struct drm_crtc_funcs *funcs, 1230 const char *name, ...); 1231 1232 __printf(6, 7) 1233 int drmm_crtc_init_with_planes(struct drm_device *dev, 1234 struct drm_crtc *crtc, 1235 struct drm_plane *primary, 1236 struct drm_plane *cursor, 1237 const struct drm_crtc_funcs *funcs, 1238 const char *name, ...); 1239 1240 void drm_crtc_cleanup(struct drm_crtc *crtc); 1241 1242 __printf(7, 8) 1243 void *__drmm_crtc_alloc_with_planes(struct drm_device *dev, 1244 size_t size, size_t offset, 1245 struct drm_plane *primary, 1246 struct drm_plane *cursor, 1247 const struct drm_crtc_funcs *funcs, 1248 const char *name, ...); 1249 1250 /** 1251 * drmm_crtc_alloc_with_planes - Allocate and initialize a new CRTC object with 1252 * specified primary and cursor planes. 1253 * @dev: DRM device 1254 * @type: the type of the struct which contains struct &drm_crtc 1255 * @member: the name of the &drm_crtc within @type. 1256 * @primary: Primary plane for CRTC 1257 * @cursor: Cursor plane for CRTC 1258 * @funcs: callbacks for the new CRTC 1259 * @name: printf style format string for the CRTC name, or NULL for default name 1260 * 1261 * Allocates and initializes a new crtc object. Cleanup is automatically 1262 * handled through registering drmm_crtc_cleanup() with drmm_add_action(). 1263 * 1264 * The @drm_crtc_funcs.destroy hook must be NULL. 1265 * 1266 * Returns: 1267 * Pointer to new crtc, or ERR_PTR on failure. 1268 */ 1269 #define drmm_crtc_alloc_with_planes(dev, type, member, primary, cursor, funcs, name, ...) \ 1270 ((type *)__drmm_crtc_alloc_with_planes(dev, sizeof(type), \ 1271 offsetof(type, member), \ 1272 primary, cursor, funcs, \ 1273 name, ##__VA_ARGS__)) 1274 1275 /** 1276 * drm_crtc_index - find the index of a registered CRTC 1277 * @crtc: CRTC to find index for 1278 * 1279 * Given a registered CRTC, return the index of that CRTC within a DRM 1280 * device's list of CRTCs. 1281 */ 1282 static inline unsigned int drm_crtc_index(const struct drm_crtc *crtc) 1283 { 1284 return crtc->index; 1285 } 1286 1287 /** 1288 * drm_crtc_mask - find the mask of a registered CRTC 1289 * @crtc: CRTC to find mask for 1290 * 1291 * Given a registered CRTC, return the mask bit of that CRTC for the 1292 * &drm_encoder.possible_crtcs and &drm_plane.possible_crtcs fields. 1293 */ 1294 static inline uint32_t drm_crtc_mask(const struct drm_crtc *crtc) 1295 { 1296 return 1 << drm_crtc_index(crtc); 1297 } 1298 1299 int drm_mode_set_config_internal(struct drm_mode_set *set); 1300 struct drm_crtc *drm_crtc_from_index(struct drm_device *dev, int idx); 1301 1302 /** 1303 * drm_crtc_find - look up a CRTC object from its ID 1304 * @dev: DRM device 1305 * @file_priv: drm file to check for lease against. 1306 * @id: &drm_mode_object ID 1307 * 1308 * This can be used to look up a CRTC from its userspace ID. Only used by 1309 * drivers for legacy IOCTLs and interface, nowadays extensions to the KMS 1310 * userspace interface should be done using &drm_property. 1311 */ 1312 static inline struct drm_crtc *drm_crtc_find(struct drm_device *dev, 1313 struct drm_file *file_priv, 1314 uint32_t id) 1315 { 1316 struct drm_mode_object *mo; 1317 mo = drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_CRTC); 1318 return mo ? obj_to_crtc(mo) : NULL; 1319 } 1320 1321 /** 1322 * drm_for_each_crtc - iterate over all CRTCs 1323 * @crtc: a &struct drm_crtc as the loop cursor 1324 * @dev: the &struct drm_device 1325 * 1326 * Iterate over all CRTCs of @dev. 1327 */ 1328 #define drm_for_each_crtc(crtc, dev) \ 1329 list_for_each_entry(crtc, &(dev)->mode_config.crtc_list, head) 1330 1331 /** 1332 * drm_for_each_crtc_reverse - iterate over all CRTCs in reverse order 1333 * @crtc: a &struct drm_crtc as the loop cursor 1334 * @dev: the &struct drm_device 1335 * 1336 * Iterate over all CRTCs of @dev. 1337 */ 1338 #define drm_for_each_crtc_reverse(crtc, dev) \ 1339 list_for_each_entry_reverse(crtc, &(dev)->mode_config.crtc_list, head) 1340 1341 int drm_crtc_create_scaling_filter_property(struct drm_crtc *crtc, 1342 unsigned int supported_filters); 1343 bool drm_crtc_in_clone_mode(struct drm_crtc_state *crtc_state); 1344 int drm_crtc_create_sharpness_strength_property(struct drm_crtc *crtc); 1345 #endif /* __DRM_CRTC_H__ */ 1346