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_commit; 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 * @background_color: 279 * 280 * RGB value representing the CRTC's background color. The background 281 * color (aka "canvas color") of a CRTC is the color that will be used 282 * for pixels not covered by a plane, or covered by transparent pixels 283 * of a plane. The value here should be built using DRM_ARGB64_PREP*() 284 * helpers, while the individual color components can be extracted with 285 * desired precision via the DRM_ARGB64_GET*() macros. 286 */ 287 u64 background_color; 288 289 /** 290 * @target_vblank: 291 * 292 * Target vertical blank period when a page flip 293 * should take effect. 294 */ 295 u32 target_vblank; 296 297 /** 298 * @async_flip: 299 * 300 * This is set when DRM_MODE_PAGE_FLIP_ASYNC is set in the legacy 301 * PAGE_FLIP IOCTL. It's not wired up for the atomic IOCTL itself yet. 302 */ 303 bool async_flip; 304 305 /** 306 * @vrr_enabled: 307 * 308 * Indicates if variable refresh rate should be enabled for the CRTC. 309 * Support for the requested vrr state will depend on driver and 310 * hardware capabiltiy - lacking support is not treated as failure. 311 */ 312 bool vrr_enabled; 313 314 /** 315 * @self_refresh_active: 316 * 317 * Used by the self refresh helpers to denote when a self refresh 318 * transition is occurring. This will be set on enable/disable callbacks 319 * when self refresh is being enabled or disabled. In some cases, it may 320 * not be desirable to fully shut off the crtc during self refresh. 321 * CRTC's can inspect this flag and determine the best course of action. 322 */ 323 bool self_refresh_active; 324 325 /** 326 * @scaling_filter: 327 * 328 * Scaling filter to be applied 329 */ 330 enum drm_scaling_filter scaling_filter; 331 332 /** 333 * @sharpness_strength: 334 * 335 * Used by the user to set the sharpness intensity. 336 * The value ranges from 0-255. 337 * Default value is 0 which disable the sharpness feature. 338 * Any value greater than 0 enables sharpening with the 339 * specified strength. 340 */ 341 u8 sharpness_strength; 342 343 /** 344 * @event: 345 * 346 * Optional pointer to a DRM event to signal upon completion of the 347 * state update. The driver must send out the event when the atomic 348 * commit operation completes. There are two cases: 349 * 350 * - The event is for a CRTC which is being disabled through this 351 * atomic commit. In that case the event can be send out any time 352 * after the hardware has stopped scanning out the current 353 * framebuffers. It should contain the timestamp and counter for the 354 * last vblank before the display pipeline was shut off. The simplest 355 * way to achieve that is calling drm_crtc_send_vblank_event() 356 * somewhen after drm_crtc_vblank_off() has been called. 357 * 358 * - For a CRTC which is enabled at the end of the commit (even when it 359 * undergoes an full modeset) the vblank timestamp and counter must 360 * be for the vblank right before the first frame that scans out the 361 * new set of buffers. Again the event can only be sent out after the 362 * hardware has stopped scanning out the old buffers. 363 * 364 * - Events for disabled CRTCs are not allowed, and drivers can ignore 365 * that case. 366 * 367 * For very simple hardware without VBLANK interrupt, enabling 368 * &struct drm_crtc_state.no_vblank makes DRM's atomic commit helpers 369 * send a fake VBLANK event at the end of the display update after all 370 * hardware changes have been applied. See 371 * drm_atomic_helper_fake_vblank(). 372 * 373 * For more complex hardware this 374 * can be handled by the drm_crtc_send_vblank_event() function, 375 * which the driver should call on the provided event upon completion of 376 * the atomic commit. Note that if the driver supports vblank signalling 377 * and timestamping the vblank counters and timestamps must agree with 378 * the ones returned from page flip events. With the current vblank 379 * helper infrastructure this can be achieved by holding a vblank 380 * reference while the page flip is pending, acquired through 381 * drm_crtc_vblank_get() and released with drm_crtc_vblank_put(). 382 * Drivers are free to implement their own vblank counter and timestamp 383 * tracking though, e.g. if they have accurate timestamp registers in 384 * hardware. 385 * 386 * For hardware which supports some means to synchronize vblank 387 * interrupt delivery with committing display state there's also 388 * drm_crtc_arm_vblank_event(). See the documentation of that function 389 * for a detailed discussion of the constraints it needs to be used 390 * safely. 391 * 392 * If the device can't notify of flip completion in a race-free way 393 * at all, then the event should be armed just after the page flip is 394 * committed. In the worst case the driver will send the event to 395 * userspace one frame too late. This doesn't allow for a real atomic 396 * update, but it should avoid tearing. 397 */ 398 struct drm_pending_vblank_event *event; 399 400 /** 401 * @commit: 402 * 403 * This tracks how the commit for this update proceeds through the 404 * various phases. This is never cleared, except when we destroy the 405 * state, so that subsequent commits can synchronize with previous ones. 406 */ 407 struct drm_crtc_commit *commit; 408 409 /** @state: backpointer to global drm_atomic_commit */ 410 struct drm_atomic_commit *state; 411 }; 412 413 /** 414 * struct drm_crtc_funcs - control CRTCs for a given device 415 * 416 * The drm_crtc_funcs structure is the central CRTC management structure 417 * in the DRM. Each CRTC controls one or more connectors (note that the name 418 * CRTC is simply historical, a CRTC may control LVDS, VGA, DVI, TV out, etc. 419 * connectors, not just CRTs). 420 * 421 * Each driver is responsible for filling out this structure at startup time, 422 * in addition to providing other modesetting features, like i2c and DDC 423 * bus accessors. 424 */ 425 struct drm_crtc_funcs { 426 /** 427 * @reset: 428 * 429 * Reset CRTC hardware and software state to off. This function isn't 430 * called by the core directly, only through drm_mode_config_reset(). 431 * It's not a helper hook only for historical reasons. 432 * 433 * Atomic drivers can use drm_atomic_helper_crtc_reset() to reset 434 * atomic state using this hook. 435 */ 436 void (*reset)(struct drm_crtc *crtc); 437 438 /** 439 * @cursor_set: 440 * 441 * Update the cursor image. The cursor position is relative to the CRTC 442 * and can be partially or fully outside of the visible area. 443 * 444 * Note that contrary to all other KMS functions the legacy cursor entry 445 * points don't take a framebuffer object, but instead take directly a 446 * raw buffer object id from the driver's buffer manager (which is 447 * either GEM or TTM for current drivers). 448 * 449 * This entry point is deprecated, drivers should instead implement 450 * universal plane support and register a proper cursor plane using 451 * drm_crtc_init_with_planes(). 452 * 453 * This callback is optional 454 * 455 * RETURNS: 456 * 457 * 0 on success or a negative error code on failure. 458 */ 459 int (*cursor_set)(struct drm_crtc *crtc, struct drm_file *file_priv, 460 uint32_t handle, uint32_t width, uint32_t height); 461 462 /** 463 * @cursor_set2: 464 * 465 * Update the cursor image, including hotspot information. The hotspot 466 * must not affect the cursor position in CRTC coordinates, but is only 467 * meant as a hint for virtualized display hardware to coordinate the 468 * guests and hosts cursor position. The cursor hotspot is relative to 469 * the cursor image. Otherwise this works exactly like @cursor_set. 470 * 471 * This entry point is deprecated, drivers should instead implement 472 * universal plane support and register a proper cursor plane using 473 * drm_crtc_init_with_planes(). 474 * 475 * This callback is optional. 476 * 477 * RETURNS: 478 * 479 * 0 on success or a negative error code on failure. 480 */ 481 int (*cursor_set2)(struct drm_crtc *crtc, struct drm_file *file_priv, 482 uint32_t handle, uint32_t width, uint32_t height, 483 int32_t hot_x, int32_t hot_y); 484 485 /** 486 * @cursor_move: 487 * 488 * Update the cursor position. The cursor does not need to be visible 489 * when this hook is called. 490 * 491 * This entry point is deprecated, drivers should instead implement 492 * universal plane support and register a proper cursor plane using 493 * drm_crtc_init_with_planes(). 494 * 495 * This callback is optional. 496 * 497 * RETURNS: 498 * 499 * 0 on success or a negative error code on failure. 500 */ 501 int (*cursor_move)(struct drm_crtc *crtc, int x, int y); 502 503 /** 504 * @gamma_set: 505 * 506 * Set gamma on the CRTC. 507 * 508 * This callback is optional. 509 * 510 * Atomic drivers who want to support gamma tables should implement the 511 * atomic color management support, enabled by calling 512 * drm_crtc_enable_color_mgmt(), which then supports the legacy gamma 513 * interface through the drm_atomic_helper_legacy_gamma_set() 514 * compatibility implementation. 515 */ 516 int (*gamma_set)(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b, 517 uint32_t size, 518 struct drm_modeset_acquire_ctx *ctx); 519 520 /** 521 * @destroy: 522 * 523 * Clean up CRTC resources. This is only called at driver unload time 524 * through drm_mode_config_cleanup() since a CRTC cannot be hotplugged 525 * in DRM. 526 */ 527 void (*destroy)(struct drm_crtc *crtc); 528 529 /** 530 * @set_config: 531 * 532 * This is the main legacy entry point to change the modeset state on a 533 * CRTC. All the details of the desired configuration are passed in a 534 * &struct drm_mode_set - see there for details. 535 * 536 * Drivers implementing atomic modeset should use 537 * drm_atomic_helper_set_config() to implement this hook. 538 * 539 * RETURNS: 540 * 541 * 0 on success or a negative error code on failure. 542 */ 543 int (*set_config)(struct drm_mode_set *set, 544 struct drm_modeset_acquire_ctx *ctx); 545 546 /** 547 * @page_flip: 548 * 549 * Legacy entry point to schedule a flip to the given framebuffer. 550 * 551 * Page flipping is a synchronization mechanism that replaces the frame 552 * buffer being scanned out by the CRTC with a new frame buffer during 553 * vertical blanking, avoiding tearing (except when requested otherwise 554 * through the DRM_MODE_PAGE_FLIP_ASYNC flag). When an application 555 * requests a page flip the DRM core verifies that the new frame buffer 556 * is large enough to be scanned out by the CRTC in the currently 557 * configured mode and then calls this hook with a pointer to the new 558 * frame buffer. 559 * 560 * The driver must wait for any pending rendering to the new framebuffer 561 * to complete before executing the flip. It should also wait for any 562 * pending rendering from other drivers if the underlying buffer is a 563 * shared dma-buf. 564 * 565 * An application can request to be notified when the page flip has 566 * completed. The drm core will supply a &struct drm_event in the event 567 * parameter in this case. This can be handled by the 568 * drm_crtc_send_vblank_event() function, which the driver should call on 569 * the provided event upon completion of the flip. Note that if 570 * the driver supports vblank signalling and timestamping the vblank 571 * counters and timestamps must agree with the ones returned from page 572 * flip events. With the current vblank helper infrastructure this can 573 * be achieved by holding a vblank reference while the page flip is 574 * pending, acquired through drm_crtc_vblank_get() and released with 575 * drm_crtc_vblank_put(). Drivers are free to implement their own vblank 576 * counter and timestamp tracking though, e.g. if they have accurate 577 * timestamp registers in hardware. 578 * 579 * This callback is optional. 580 * 581 * NOTE: 582 * 583 * Very early versions of the KMS ABI mandated that the driver must 584 * block (but not reject) any rendering to the old framebuffer until the 585 * flip operation has completed and the old framebuffer is no longer 586 * visible. This requirement has been lifted, and userspace is instead 587 * expected to request delivery of an event and wait with recycling old 588 * buffers until such has been received. 589 * 590 * RETURNS: 591 * 592 * 0 on success or a negative error code on failure. Note that if a 593 * page flip operation is already pending the callback should return 594 * -EBUSY. Pageflips on a disabled CRTC (either by setting a NULL mode 595 * or just runtime disabled through DPMS respectively the new atomic 596 * "ACTIVE" state) should result in an -EINVAL error code. Note that 597 * drm_atomic_helper_page_flip() checks this already for atomic drivers. 598 */ 599 int (*page_flip)(struct drm_crtc *crtc, 600 struct drm_framebuffer *fb, 601 struct drm_pending_vblank_event *event, 602 uint32_t flags, 603 struct drm_modeset_acquire_ctx *ctx); 604 605 /** 606 * @page_flip_target: 607 * 608 * Same as @page_flip but with an additional parameter specifying the 609 * absolute target vertical blank period (as reported by 610 * drm_crtc_vblank_count()) when the flip should take effect. 611 * 612 * Note that the core code calls drm_crtc_vblank_get before this entry 613 * point, and will call drm_crtc_vblank_put if this entry point returns 614 * any non-0 error code. It's the driver's responsibility to call 615 * drm_crtc_vblank_put after this entry point returns 0, typically when 616 * the flip completes. 617 */ 618 int (*page_flip_target)(struct drm_crtc *crtc, 619 struct drm_framebuffer *fb, 620 struct drm_pending_vblank_event *event, 621 uint32_t flags, uint32_t target, 622 struct drm_modeset_acquire_ctx *ctx); 623 624 /** 625 * @set_property: 626 * 627 * This is the legacy entry point to update a property attached to the 628 * CRTC. 629 * 630 * This callback is optional if the driver does not support any legacy 631 * driver-private properties. For atomic drivers it is not used because 632 * property handling is done entirely in the DRM core. 633 * 634 * RETURNS: 635 * 636 * 0 on success or a negative error code on failure. 637 */ 638 int (*set_property)(struct drm_crtc *crtc, 639 struct drm_property *property, uint64_t val); 640 641 /** 642 * @atomic_create_state: 643 * 644 * Allocate a pristine, initialized, state for the CRTC object 645 * and return it. This callback must have no side effects: in 646 * particular, the returned state must not be assigned to the 647 * object's state pointer and it must not affect the hardware 648 * state. 649 * 650 * RETURNS: 651 * 652 * A new, pristine, CRTC state instance or an error pointer 653 * on failure. 654 */ 655 struct drm_crtc_state *(*atomic_create_state)(struct drm_crtc *crtc); 656 657 /** 658 * @atomic_duplicate_state: 659 * 660 * Duplicate the current atomic state for this CRTC and return it. 661 * The core and helpers guarantee that any atomic state duplicated with 662 * this hook and still owned by the caller (i.e. not transferred to the 663 * driver by calling &drm_mode_config_funcs.atomic_commit) will be 664 * cleaned up by calling the @atomic_destroy_state hook in this 665 * structure. 666 * 667 * This callback is mandatory for atomic drivers. 668 * 669 * Atomic drivers which don't subclass &struct drm_crtc_state should use 670 * drm_atomic_helper_crtc_duplicate_state(). Drivers that subclass the 671 * state structure to extend it with driver-private state should use 672 * __drm_atomic_helper_crtc_duplicate_state() to make sure shared state is 673 * duplicated in a consistent fashion across drivers. 674 * 675 * It is an error to call this hook before &drm_crtc.state has been 676 * initialized correctly. 677 * 678 * NOTE: 679 * 680 * If the duplicate state references refcounted resources this hook must 681 * acquire a reference for each of them. The driver must release these 682 * references again in @atomic_destroy_state. 683 * 684 * RETURNS: 685 * 686 * Duplicated atomic state or NULL when the allocation failed. 687 */ 688 struct drm_crtc_state *(*atomic_duplicate_state)(struct drm_crtc *crtc); 689 690 /** 691 * @atomic_destroy_state: 692 * 693 * Destroy a state duplicated with @atomic_duplicate_state and release 694 * or unreference all resources it references 695 * 696 * This callback is mandatory for atomic drivers. 697 */ 698 void (*atomic_destroy_state)(struct drm_crtc *crtc, 699 struct drm_crtc_state *state); 700 701 /** 702 * @atomic_set_property: 703 * 704 * Decode a driver-private property value and store the decoded value 705 * into the passed-in state structure. Since the atomic core decodes all 706 * standardized properties (even for extensions beyond the core set of 707 * properties which might not be implemented by all drivers) this 708 * requires drivers to subclass the state structure. 709 * 710 * Such driver-private properties should really only be implemented for 711 * truly hardware/vendor specific state. Instead it is preferred to 712 * standardize atomic extension and decode the properties used to expose 713 * such an extension in the core. 714 * 715 * Do not call this function directly, use 716 * drm_atomic_crtc_set_property() instead. 717 * 718 * This callback is optional if the driver does not support any 719 * driver-private atomic properties. 720 * 721 * NOTE: 722 * 723 * This function is called in the state assembly phase of atomic 724 * modesets, which can be aborted for any reason (including on 725 * userspace's request to just check whether a configuration would be 726 * possible). Drivers MUST NOT touch any persistent state (hardware or 727 * software) or data structures except the passed in @state parameter. 728 * 729 * Also since userspace controls in which order properties are set this 730 * function must not do any input validation (since the state update is 731 * incomplete and hence likely inconsistent). Instead any such input 732 * validation must be done in the various atomic_check callbacks. 733 * 734 * RETURNS: 735 * 736 * 0 if the property has been found, -EINVAL if the property isn't 737 * implemented by the driver (which should never happen, the core only 738 * asks for properties attached to this CRTC). No other validation is 739 * allowed by the driver. The core already checks that the property 740 * value is within the range (integer, valid enum value, ...) the driver 741 * set when registering the property. 742 */ 743 int (*atomic_set_property)(struct drm_crtc *crtc, 744 struct drm_crtc_state *state, 745 struct drm_property *property, 746 uint64_t val); 747 /** 748 * @atomic_get_property: 749 * 750 * Reads out the decoded driver-private property. This is used to 751 * implement the GETCRTC IOCTL. 752 * 753 * Do not call this function directly, use 754 * drm_atomic_crtc_get_property() instead. 755 * 756 * This callback is optional if the driver does not support any 757 * driver-private atomic properties. 758 * 759 * RETURNS: 760 * 761 * 0 on success, -EINVAL if the property isn't implemented by the 762 * driver (which should never happen, the core only asks for 763 * properties attached to this CRTC). 764 */ 765 int (*atomic_get_property)(struct drm_crtc *crtc, 766 const struct drm_crtc_state *state, 767 struct drm_property *property, 768 uint64_t *val); 769 770 /** 771 * @late_register: 772 * 773 * This optional hook can be used to register additional userspace 774 * interfaces attached to the crtc like debugfs interfaces. 775 * It is called late in the driver load sequence from drm_dev_register(). 776 * Everything added from this callback should be unregistered in 777 * the early_unregister callback. 778 * 779 * Returns: 780 * 781 * 0 on success, or a negative error code on failure. 782 */ 783 int (*late_register)(struct drm_crtc *crtc); 784 785 /** 786 * @early_unregister: 787 * 788 * This optional hook should be used to unregister the additional 789 * userspace interfaces attached to the crtc from 790 * @late_register. It is called from drm_dev_unregister(), 791 * early in the driver unload sequence to disable userspace access 792 * before data structures are torndown. 793 */ 794 void (*early_unregister)(struct drm_crtc *crtc); 795 796 /** 797 * @set_crc_source: 798 * 799 * Changes the source of CRC checksums of frames at the request of 800 * userspace, typically for testing purposes. The sources available are 801 * specific of each driver and a %NULL value indicates that CRC 802 * generation is to be switched off. 803 * 804 * When CRC generation is enabled, the driver should call 805 * drm_crtc_add_crc_entry() at each frame, providing any information 806 * that characterizes the frame contents in the crcN arguments, as 807 * provided from the configured source. Drivers must accept an "auto" 808 * source name that will select a default source for this CRTC. 809 * 810 * This may trigger an atomic modeset commit if necessary, to enable CRC 811 * generation. 812 * 813 * Note that "auto" can depend upon the current modeset configuration, 814 * e.g. it could pick an encoder or output specific CRC sampling point. 815 * 816 * This callback is optional if the driver does not support any CRC 817 * generation functionality. 818 * 819 * RETURNS: 820 * 821 * 0 on success or a negative error code on failure. 822 */ 823 int (*set_crc_source)(struct drm_crtc *crtc, const char *source); 824 825 /** 826 * @verify_crc_source: 827 * 828 * verifies the source of CRC checksums of frames before setting the 829 * source for CRC and during crc open. Source parameter can be NULL 830 * while disabling crc source. 831 * 832 * This callback is optional if the driver does not support any CRC 833 * generation functionality. 834 * 835 * RETURNS: 836 * 837 * 0 on success or a negative error code on failure. 838 */ 839 int (*verify_crc_source)(struct drm_crtc *crtc, const char *source, 840 size_t *values_cnt); 841 /** 842 * @get_crc_sources: 843 * 844 * Driver callback for getting a list of all the available sources for 845 * CRC generation. This callback depends upon verify_crc_source, So 846 * verify_crc_source callback should be implemented before implementing 847 * this. Driver can pass full list of available crc sources, this 848 * callback does the verification on each crc-source before passing it 849 * to userspace. 850 * 851 * This callback is optional if the driver does not support exporting of 852 * possible CRC sources list. 853 * 854 * RETURNS: 855 * 856 * a constant character pointer to the list of all the available CRC 857 * sources. On failure driver should return NULL. count should be 858 * updated with number of sources in list. if zero we don't process any 859 * source from the list. 860 */ 861 const char *const *(*get_crc_sources)(struct drm_crtc *crtc, 862 size_t *count); 863 864 /** 865 * @atomic_print_state: 866 * 867 * If driver subclasses &struct drm_crtc_state, it should implement 868 * this optional hook for printing additional driver specific state. 869 * 870 * Do not call this directly, use drm_atomic_crtc_print_state() 871 * instead. 872 */ 873 void (*atomic_print_state)(struct drm_printer *p, 874 const struct drm_crtc_state *state); 875 876 /** 877 * @get_vblank_counter: 878 * 879 * Driver callback for fetching a raw hardware vblank counter for the 880 * CRTC. It's meant to be used by new drivers as the replacement of 881 * &drm_driver.get_vblank_counter hook. 882 * 883 * This callback is optional. If a device doesn't have a hardware 884 * counter, the driver can simply leave the hook as NULL. The DRM core 885 * will account for missed vblank events while interrupts where disabled 886 * based on system timestamps. 887 * 888 * Wraparound handling and loss of events due to modesetting is dealt 889 * with in the DRM core code, as long as drivers call 890 * drm_crtc_vblank_off() and drm_crtc_vblank_on() when disabling or 891 * enabling a CRTC. 892 * 893 * See also &drm_device.vblank_disable_immediate and 894 * &drm_device.max_vblank_count. 895 * 896 * Returns: 897 * 898 * Raw vblank counter value. 899 */ 900 u32 (*get_vblank_counter)(struct drm_crtc *crtc); 901 902 /** 903 * @enable_vblank: 904 * 905 * Enable vblank interrupts for the CRTC. It's meant to be used by 906 * new drivers as the replacement of &drm_driver.enable_vblank hook. 907 * 908 * Returns: 909 * 910 * Zero on success, appropriate errno if the vblank interrupt cannot 911 * be enabled. 912 */ 913 int (*enable_vblank)(struct drm_crtc *crtc); 914 915 /** 916 * @disable_vblank: 917 * 918 * Disable vblank interrupts for the CRTC. It's meant to be used by 919 * new drivers as the replacement of &drm_driver.disable_vblank hook. 920 */ 921 void (*disable_vblank)(struct drm_crtc *crtc); 922 923 /** 924 * @get_vblank_timestamp: 925 * 926 * Called by drm_get_last_vbltimestamp(). Should return a precise 927 * timestamp when the most recent vblank interval ended or will end. 928 * 929 * Specifically, the timestamp in @vblank_time should correspond as 930 * closely as possible to the time when the first video scanline of 931 * the video frame after the end of vblank will start scanning out, 932 * the time immediately after end of the vblank interval. If the 933 * @crtc is currently inside vblank, this will be a time in the future. 934 * If the @crtc is currently scanning out a frame, this will be the 935 * past start time of the current scanout. This is meant to adhere 936 * to the OpenML OML_sync_control extension specification. 937 * 938 * Parameters: 939 * 940 * crtc: 941 * CRTC for which timestamp should be returned. 942 * max_error: 943 * Maximum allowable timestamp error in nanoseconds. 944 * Implementation should strive to provide timestamp 945 * with an error of at most max_error nanoseconds. 946 * Returns true upper bound on error for timestamp. 947 * vblank_time: 948 * Target location for returned vblank timestamp. 949 * in_vblank_irq: 950 * True when called from drm_crtc_handle_vblank(). Some drivers 951 * need to apply some workarounds for gpu-specific vblank irq quirks 952 * if flag is set. 953 * 954 * Returns: 955 * 956 * True on success, false on failure, which means the core should 957 * fallback to a simple timestamp taken in drm_crtc_handle_vblank(). 958 */ 959 bool (*get_vblank_timestamp)(struct drm_crtc *crtc, 960 int *max_error, 961 ktime_t *vblank_time, 962 bool in_vblank_irq); 963 }; 964 965 /** 966 * struct drm_crtc - central CRTC control structure 967 * 968 * Each CRTC may have one or more connectors associated with it. This structure 969 * allows the CRTC to be controlled. 970 */ 971 struct drm_crtc { 972 /** @dev: parent DRM device */ 973 struct drm_device *dev; 974 /** @port: OF node used by drm_of_find_possible_crtcs(). */ 975 struct device_node *port; 976 /** 977 * @head: 978 * 979 * List of all CRTCs on @dev, linked from &drm_mode_config.crtc_list. 980 * Invariant over the lifetime of @dev and therefore does not need 981 * locking. 982 */ 983 struct list_head head; 984 985 /** @name: human readable name, can be overwritten by the driver */ 986 char *name; 987 988 /** 989 * @mutex: 990 * 991 * This provides a read lock for the overall CRTC state (mode, dpms 992 * state, ...) and a write lock for everything which can be update 993 * without a full modeset (fb, cursor data, CRTC properties ...). A full 994 * modeset also need to grab &drm_mode_config.connection_mutex. 995 * 996 * For atomic drivers specifically this protects @state. 997 */ 998 struct drm_modeset_lock mutex; 999 1000 /** @base: base KMS object for ID tracking etc. */ 1001 struct drm_mode_object base; 1002 1003 /** 1004 * @primary: 1005 * Primary plane for this CRTC. Note that this is only 1006 * relevant for legacy IOCTL, it specifies the plane implicitly used by 1007 * the SETCRTC and PAGE_FLIP IOCTLs. It does not have any significance 1008 * beyond that. 1009 */ 1010 struct drm_plane *primary; 1011 1012 /** 1013 * @cursor: 1014 * Cursor plane for this CRTC. Note that this is only relevant for 1015 * legacy IOCTL, it specifies the plane implicitly used by the SETCURSOR 1016 * and SETCURSOR2 IOCTLs. It does not have any significance 1017 * beyond that. 1018 */ 1019 struct drm_plane *cursor; 1020 1021 /** 1022 * @index: Position inside the mode_config.list, can be used as an array 1023 * index. It is invariant over the lifetime of the CRTC. 1024 */ 1025 unsigned index; 1026 1027 /** 1028 * @cursor_x: Current x position of the cursor, used for universal 1029 * cursor planes because the SETCURSOR IOCTL only can update the 1030 * framebuffer without supplying the coordinates. Drivers should not use 1031 * this directly, atomic drivers should look at &drm_plane_state.crtc_x 1032 * of the cursor plane instead. 1033 */ 1034 int cursor_x; 1035 /** 1036 * @cursor_y: Current y position of the cursor, used for universal 1037 * cursor planes because the SETCURSOR IOCTL only can update the 1038 * framebuffer without supplying the coordinates. Drivers should not use 1039 * this directly, atomic drivers should look at &drm_plane_state.crtc_y 1040 * of the cursor plane instead. 1041 */ 1042 int cursor_y; 1043 1044 /** 1045 * @enabled: 1046 * 1047 * Is this CRTC enabled? Should only be used by legacy drivers, atomic 1048 * drivers should instead consult &drm_crtc_state.enable and 1049 * &drm_crtc_state.active. Atomic drivers can update this by calling 1050 * drm_atomic_helper_update_legacy_modeset_state(). 1051 */ 1052 bool enabled; 1053 1054 /** 1055 * @mode: 1056 * 1057 * Current mode timings. Should only be used by legacy drivers, atomic 1058 * drivers should instead consult &drm_crtc_state.mode. Atomic drivers 1059 * can update this by calling 1060 * drm_atomic_helper_update_legacy_modeset_state(). 1061 */ 1062 struct drm_display_mode mode; 1063 1064 /** 1065 * @hwmode: 1066 * 1067 * Programmed mode in hw, after adjustments for encoders, crtc, panel 1068 * scaling etc. Should only be used by legacy drivers, for high 1069 * precision vblank timestamps in 1070 * drm_crtc_vblank_helper_get_vblank_timestamp(). 1071 * 1072 * Note that atomic drivers should not use this, but instead use 1073 * &drm_crtc_state.adjusted_mode. And for high-precision timestamps 1074 * drm_crtc_vblank_helper_get_vblank_timestamp() used 1075 * &drm_vblank_crtc.hwmode, 1076 * which is filled out by calling drm_calc_timestamping_constants(). 1077 */ 1078 struct drm_display_mode hwmode; 1079 1080 /** 1081 * @x: 1082 * x position on screen. Should only be used by legacy drivers, atomic 1083 * drivers should look at &drm_plane_state.crtc_x of the primary plane 1084 * instead. Updated by calling 1085 * drm_atomic_helper_update_legacy_modeset_state(). 1086 */ 1087 int x; 1088 /** 1089 * @y: 1090 * y position on screen. Should only be used by legacy drivers, atomic 1091 * drivers should look at &drm_plane_state.crtc_y of the primary plane 1092 * instead. Updated by calling 1093 * drm_atomic_helper_update_legacy_modeset_state(). 1094 */ 1095 int y; 1096 1097 /** @funcs: CRTC control functions */ 1098 const struct drm_crtc_funcs *funcs; 1099 1100 /** 1101 * @gamma_size: Size of legacy gamma ramp reported to userspace. Set up 1102 * by calling drm_mode_crtc_set_gamma_size(). 1103 * 1104 * Note that atomic drivers need to instead use 1105 * &drm_crtc_state.gamma_lut. See drm_crtc_enable_color_mgmt(). 1106 */ 1107 uint32_t gamma_size; 1108 1109 /** 1110 * @gamma_store: Gamma ramp values used by the legacy SETGAMMA and 1111 * GETGAMMA IOCTls. Set up by calling drm_mode_crtc_set_gamma_size(). 1112 * 1113 * Note that atomic drivers need to instead use 1114 * &drm_crtc_state.gamma_lut. See drm_crtc_enable_color_mgmt(). 1115 */ 1116 uint16_t *gamma_store; 1117 1118 /** @helper_private: mid-layer private data */ 1119 const struct drm_crtc_helper_funcs *helper_private; 1120 1121 /** @properties: property tracking for this CRTC */ 1122 struct drm_object_properties properties; 1123 1124 /** 1125 * @scaling_filter_property: property to apply a particular filter while 1126 * scaling. 1127 */ 1128 struct drm_property *scaling_filter_property; 1129 1130 /** 1131 * @sharpness_strength_property: property to apply 1132 * the intensity of the sharpness requested. 1133 */ 1134 struct drm_property *sharpness_strength_property; 1135 1136 /** 1137 * @state: 1138 * 1139 * Current atomic state for this CRTC. 1140 * 1141 * This is protected by @mutex. Note that nonblocking atomic commits 1142 * access the current CRTC state without taking locks. Either by going 1143 * through the &struct drm_atomic_commit pointers, see 1144 * for_each_oldnew_crtc_in_state(), for_each_old_crtc_in_state() and 1145 * for_each_new_crtc_in_state(). Or through careful ordering of atomic 1146 * commit operations as implemented in the atomic helpers, see 1147 * &struct drm_crtc_commit. 1148 */ 1149 struct drm_crtc_state *state; 1150 1151 /** 1152 * @commit_list: 1153 * 1154 * List of &drm_crtc_commit structures tracking pending commits. 1155 * Protected by @commit_lock. This list holds its own full reference, 1156 * as does the ongoing commit. 1157 * 1158 * "Note that the commit for a state change is also tracked in 1159 * &drm_crtc_state.commit. For accessing the immediately preceding 1160 * commit in an atomic update it is recommended to just use that 1161 * pointer in the old CRTC state, since accessing that doesn't need 1162 * any locking or list-walking. @commit_list should only be used to 1163 * stall for framebuffer cleanup that's signalled through 1164 * &drm_crtc_commit.cleanup_done." 1165 */ 1166 struct list_head commit_list; 1167 1168 /** 1169 * @commit_lock: 1170 * 1171 * Spinlock to protect @commit_list. 1172 */ 1173 spinlock_t commit_lock; 1174 1175 /** 1176 * @debugfs_entry: 1177 * 1178 * Debugfs directory for this CRTC. 1179 */ 1180 struct dentry *debugfs_entry; 1181 1182 /** 1183 * @crc: 1184 * 1185 * Configuration settings of CRC capture. 1186 */ 1187 struct drm_crtc_crc crc; 1188 1189 /** 1190 * @fence_context: 1191 * 1192 * timeline context used for fence operations. 1193 */ 1194 unsigned int fence_context; 1195 1196 /** 1197 * @fence_lock: 1198 * 1199 * spinlock to protect the fences in the fence_context. 1200 */ 1201 spinlock_t fence_lock; 1202 /** 1203 * @fence_seqno: 1204 * 1205 * Seqno variable used as monotonic counter for the fences 1206 * created on the CRTC's timeline. 1207 */ 1208 unsigned long fence_seqno; 1209 1210 /** 1211 * @timeline_name: 1212 * 1213 * The name of the CRTC's fence timeline. 1214 */ 1215 char timeline_name[32]; 1216 1217 /** 1218 * @self_refresh_data: Holds the state for the self refresh helpers 1219 * 1220 * Initialized via drm_self_refresh_helper_init(). 1221 */ 1222 struct drm_self_refresh_data *self_refresh_data; 1223 }; 1224 1225 /** 1226 * struct drm_mode_set - new values for a CRTC config change 1227 * @fb: framebuffer to use for new config 1228 * @crtc: CRTC whose configuration we're about to change 1229 * @mode: mode timings to use 1230 * @x: position of this CRTC relative to @fb 1231 * @y: position of this CRTC relative to @fb 1232 * @connectors: array of connectors to drive with this CRTC if possible 1233 * @num_connectors: size of @connectors array 1234 * 1235 * This represents a modeset configuration for the legacy SETCRTC ioctl and is 1236 * also used internally. Atomic drivers instead use &drm_atomic_commit. 1237 */ 1238 struct drm_mode_set { 1239 struct drm_framebuffer *fb; 1240 struct drm_crtc *crtc; 1241 struct drm_display_mode *mode; 1242 1243 uint32_t x; 1244 uint32_t y; 1245 1246 struct drm_connector **connectors; 1247 size_t num_connectors; 1248 }; 1249 1250 #define obj_to_crtc(x) container_of(x, struct drm_crtc, base) 1251 1252 __printf(6, 7) 1253 int drm_crtc_init_with_planes(struct drm_device *dev, 1254 struct drm_crtc *crtc, 1255 struct drm_plane *primary, 1256 struct drm_plane *cursor, 1257 const struct drm_crtc_funcs *funcs, 1258 const char *name, ...); 1259 1260 __printf(6, 7) 1261 int drmm_crtc_init_with_planes(struct drm_device *dev, 1262 struct drm_crtc *crtc, 1263 struct drm_plane *primary, 1264 struct drm_plane *cursor, 1265 const struct drm_crtc_funcs *funcs, 1266 const char *name, ...); 1267 1268 void drm_crtc_cleanup(struct drm_crtc *crtc); 1269 1270 __printf(7, 8) 1271 void *__drmm_crtc_alloc_with_planes(struct drm_device *dev, 1272 size_t size, size_t offset, 1273 struct drm_plane *primary, 1274 struct drm_plane *cursor, 1275 const struct drm_crtc_funcs *funcs, 1276 const char *name, ...); 1277 1278 /** 1279 * drmm_crtc_alloc_with_planes - Allocate and initialize a new CRTC object with 1280 * specified primary and cursor planes. 1281 * @dev: DRM device 1282 * @type: the type of the struct which contains struct &drm_crtc 1283 * @member: the name of the &drm_crtc within @type. 1284 * @primary: Primary plane for CRTC 1285 * @cursor: Cursor plane for CRTC 1286 * @funcs: callbacks for the new CRTC 1287 * @name: printf style format string for the CRTC name, or NULL for default name 1288 * 1289 * Allocates and initializes a new crtc object. Cleanup is automatically 1290 * handled through registering drmm_crtc_cleanup() with drmm_add_action(). 1291 * 1292 * The @drm_crtc_funcs.destroy hook must be NULL. 1293 * 1294 * Returns: 1295 * Pointer to new crtc, or ERR_PTR on failure. 1296 */ 1297 #define drmm_crtc_alloc_with_planes(dev, type, member, primary, cursor, funcs, name, ...) \ 1298 ((type *)__drmm_crtc_alloc_with_planes(dev, sizeof(type), \ 1299 offsetof(type, member), \ 1300 primary, cursor, funcs, \ 1301 name, ##__VA_ARGS__)) 1302 1303 /** 1304 * drm_crtc_index - find the index of a registered CRTC 1305 * @crtc: CRTC to find index for 1306 * 1307 * Given a registered CRTC, return the index of that CRTC within a DRM 1308 * device's list of CRTCs. 1309 */ 1310 static inline unsigned int drm_crtc_index(const struct drm_crtc *crtc) 1311 { 1312 return crtc->index; 1313 } 1314 1315 /** 1316 * drm_crtc_mask - find the mask of a registered CRTC 1317 * @crtc: CRTC to find mask for 1318 * 1319 * Given a registered CRTC, return the mask bit of that CRTC for the 1320 * &drm_encoder.possible_crtcs and &drm_plane.possible_crtcs fields. 1321 */ 1322 static inline uint32_t drm_crtc_mask(const struct drm_crtc *crtc) 1323 { 1324 return 1 << drm_crtc_index(crtc); 1325 } 1326 1327 int drm_mode_set_config_internal(struct drm_mode_set *set); 1328 struct drm_crtc *drm_crtc_from_index(struct drm_device *dev, int idx); 1329 1330 /** 1331 * drm_crtc_find - look up a CRTC object from its ID 1332 * @dev: DRM device 1333 * @file_priv: drm file to check for lease against. 1334 * @id: &drm_mode_object ID 1335 * 1336 * This can be used to look up a CRTC from its userspace ID. Only used by 1337 * drivers for legacy IOCTLs and interface, nowadays extensions to the KMS 1338 * userspace interface should be done using &drm_property. 1339 */ 1340 static inline struct drm_crtc *drm_crtc_find(struct drm_device *dev, 1341 struct drm_file *file_priv, 1342 uint32_t id) 1343 { 1344 struct drm_mode_object *mo; 1345 mo = drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_CRTC); 1346 return mo ? obj_to_crtc(mo) : NULL; 1347 } 1348 1349 /** 1350 * drm_for_each_crtc - iterate over all CRTCs 1351 * @crtc: a &struct drm_crtc as the loop cursor 1352 * @dev: the &struct drm_device 1353 * 1354 * Iterate over all CRTCs of @dev. 1355 */ 1356 #define drm_for_each_crtc(crtc, dev) \ 1357 list_for_each_entry(crtc, &(dev)->mode_config.crtc_list, head) 1358 1359 /** 1360 * drm_for_each_crtc_reverse - iterate over all CRTCs in reverse order 1361 * @crtc: a &struct drm_crtc as the loop cursor 1362 * @dev: the &struct drm_device 1363 * 1364 * Iterate over all CRTCs of @dev. 1365 */ 1366 #define drm_for_each_crtc_reverse(crtc, dev) \ 1367 list_for_each_entry_reverse(crtc, &(dev)->mode_config.crtc_list, head) 1368 1369 int drm_crtc_create_scaling_filter_property(struct drm_crtc *crtc, 1370 unsigned int supported_filters); 1371 bool drm_crtc_in_clone_mode(struct drm_crtc_state *crtc_state); 1372 int drm_crtc_create_sharpness_strength_property(struct drm_crtc *crtc); 1373 #endif /* __DRM_CRTC_H__ */ 1374