2 * Copyright © 2006 Keith Packard
3 * Copyright © 2007-2008 Dave Airlie
4 * Copyright © 2007-2008 Intel Corporation
5 * Jesse Barnes <jesse.barnes@intel.com>
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:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
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.
25 #ifndef __DRM_CRTC_H__
26 #define __DRM_CRTC_H__
28 #include <linux/i2c.h>
29 #include <linux/spinlock.h>
30 #include <linux/types.h>
31 #include <linux/idr.h>
33 #include <linux/hdmi.h>
34 #include <linux/media-bus-format.h>
35 #include <uapi/drm/drm_mode.h>
36 #include <uapi/drm/drm_fourcc.h>
37 #include <drm/drm_modeset_lock.h>
41 struct drm_framebuffer
;
42 struct drm_object_properties
;
48 struct drm_mode_object
{
51 struct drm_object_properties
*properties
;
53 void (*free_cb
)(struct kref
*kref
);
56 #define DRM_OBJECT_MAX_PROPERTY 24
57 struct drm_object_properties
{
58 int count
, atomic_count
;
59 /* NOTE: if we ever start dynamically destroying properties (ie.
60 * not at drm_mode_config_cleanup() time), then we'd have to do
61 * a better job of detaching property from mode objects to avoid
62 * dangling property pointers:
64 struct drm_property
*properties
[DRM_OBJECT_MAX_PROPERTY
];
65 /* do not read/write values directly, but use drm_object_property_get_value()
66 * and drm_object_property_set_value():
68 uint64_t values
[DRM_OBJECT_MAX_PROPERTY
];
71 static inline int64_t U642I64(uint64_t val
)
73 return (int64_t)*((int64_t *)&val
);
75 static inline uint64_t I642U64(int64_t val
)
77 return (uint64_t)*((uint64_t *)&val
);
81 * Rotation property bits. DRM_ROTATE_<degrees> rotates the image by the
82 * specified amount in degrees in counter clockwise direction. DRM_REFLECT_X and
83 * DRM_REFLECT_Y reflects the image along the specified axis prior to rotation
85 #define DRM_ROTATE_MASK 0x0f
86 #define DRM_ROTATE_0 0
87 #define DRM_ROTATE_90 1
88 #define DRM_ROTATE_180 2
89 #define DRM_ROTATE_270 3
90 #define DRM_REFLECT_MASK (~DRM_ROTATE_MASK)
91 #define DRM_REFLECT_X 4
92 #define DRM_REFLECT_Y 5
94 enum drm_connector_force
{
95 DRM_FORCE_UNSPECIFIED
,
97 DRM_FORCE_ON
, /* force on analog part normally */
98 DRM_FORCE_ON_DIGITAL
, /* for DVI-I use digital connector */
101 #include <drm/drm_modes.h>
103 enum drm_connector_status
{
104 connector_status_connected
= 1,
105 connector_status_disconnected
= 2,
106 connector_status_unknown
= 3,
109 enum subpixel_order
{
111 SubPixelHorizontalRGB
,
112 SubPixelHorizontalBGR
,
118 #define DRM_COLOR_FORMAT_RGB444 (1<<0)
119 #define DRM_COLOR_FORMAT_YCRCB444 (1<<1)
120 #define DRM_COLOR_FORMAT_YCRCB422 (1<<2)
122 #define DRM_BUS_FLAG_DE_LOW (1<<0)
123 #define DRM_BUS_FLAG_DE_HIGH (1<<1)
124 /* drive data on pos. edge */
125 #define DRM_BUS_FLAG_PIXDATA_POSEDGE (1<<2)
126 /* drive data on neg. edge */
127 #define DRM_BUS_FLAG_PIXDATA_NEGEDGE (1<<3)
130 * Describes a given display (e.g. CRT or flat panel) and its limitations.
132 struct drm_display_info
{
133 char name
[DRM_DISPLAY_INFO_LEN
];
136 unsigned int width_mm
;
137 unsigned int height_mm
;
139 /* Clock limits FIXME: storage format */
140 unsigned int min_vfreq
, max_vfreq
;
141 unsigned int min_hfreq
, max_hfreq
;
142 unsigned int pixel_clock
;
145 enum subpixel_order subpixel_order
;
148 const u32
*bus_formats
;
149 unsigned int num_bus_formats
;
152 /* Mask of supported hdmi deep color modes */
153 u8 edid_hdmi_dc_modes
;
158 /* data corresponds to displayid vend/prod/serial */
159 struct drm_tile_group
{
160 struct kref refcount
;
161 struct drm_device
*dev
;
167 * struct drm_framebuffer_funcs - framebuffer hooks
169 struct drm_framebuffer_funcs
{
173 * Clean up framebuffer resources, specifically also unreference the
174 * backing storage. The core guarantees to call this function for every
175 * framebuffer successfully created by ->fb_create() in
176 * &drm_mode_config_funcs. Drivers must also call
177 * drm_framebuffer_cleanup() to release DRM core resources for this
180 void (*destroy
)(struct drm_framebuffer
*framebuffer
);
185 * Create a buffer handle in the driver-specific buffer manager (either
186 * GEM or TTM) valid for the passed-in struct &drm_file. This is used by
187 * the core to implement the GETFB IOCTL, which returns (for
188 * sufficiently priviledged user) also a native buffer handle. This can
189 * be used for seamless transitions between modesetting clients by
190 * copying the current screen contents to a private buffer and blending
191 * between that and the new contents.
193 * GEM based drivers should call drm_gem_handle_create() to create the
198 * 0 on success or a negative error code on failure.
200 int (*create_handle
)(struct drm_framebuffer
*fb
,
201 struct drm_file
*file_priv
,
202 unsigned int *handle
);
206 * Optional callback for the dirty fb IOCTL.
208 * Userspace can notify the driver via this callback that an area of the
209 * framebuffer has changed and should be flushed to the display
210 * hardware. This can also be used internally, e.g. by the fbdev
211 * emulation, though that's not the case currently.
213 * See documentation in drm_mode.h for the struct drm_mode_fb_dirty_cmd
214 * for more information as all the semantics and arguments have a one to
215 * one mapping on this function.
219 * 0 on success or a negative error code on failure.
221 int (*dirty
)(struct drm_framebuffer
*framebuffer
,
222 struct drm_file
*file_priv
, unsigned flags
,
223 unsigned color
, struct drm_clip_rect
*clips
,
227 struct drm_framebuffer
{
228 struct drm_device
*dev
;
230 * Note that the fb is refcounted for the benefit of driver internals,
231 * for example some hw, disabling a CRTC/plane is asynchronous, and
232 * scanout does not actually complete until the next vblank. So some
233 * cleanup (like releasing the reference(s) on the backing GEM bo(s))
234 * should be deferred. In cases like this, the driver would like to
235 * hold a ref to the fb even though it has already been removed from
236 * userspace perspective.
237 * The refcount is stored inside the mode object.
240 * Place on the dev->mode_config.fb_list, access protected by
241 * dev->mode_config.fb_lock.
243 struct list_head head
;
244 struct drm_mode_object base
;
245 const struct drm_framebuffer_funcs
*funcs
;
246 unsigned int pitches
[4];
247 unsigned int offsets
[4];
248 uint64_t modifier
[4];
251 /* depth can be 15 or 16 */
255 uint32_t pixel_format
; /* fourcc format */
258 struct list_head filp_head
;
261 struct drm_property_blob
{
262 struct drm_mode_object base
;
263 struct drm_device
*dev
;
264 struct list_head head_global
;
265 struct list_head head_file
;
267 unsigned char data
[];
270 struct drm_property_enum
{
272 struct list_head head
;
273 char name
[DRM_PROP_NAME_LEN
];
276 struct drm_property
{
277 struct list_head head
;
278 struct drm_mode_object base
;
280 char name
[DRM_PROP_NAME_LEN
];
283 struct drm_device
*dev
;
285 struct list_head enum_list
;
289 struct drm_connector
;
291 struct drm_pending_vblank_event
;
294 struct drm_atomic_state
;
296 struct drm_crtc_helper_funcs
;
297 struct drm_encoder_helper_funcs
;
298 struct drm_connector_helper_funcs
;
299 struct drm_plane_helper_funcs
;
302 * struct drm_crtc_state - mutable CRTC state
303 * @crtc: backpointer to the CRTC
304 * @enable: whether the CRTC should be enabled, gates all other state
305 * @active: whether the CRTC is actively displaying (used for DPMS)
306 * @planes_changed: planes on this crtc are updated
307 * @mode_changed: crtc_state->mode or crtc_state->enable has been changed
308 * @active_changed: crtc_state->active has been toggled.
309 * @connectors_changed: connectors to this crtc have been updated
310 * @color_mgmt_changed: color management properties have changed (degamma or
311 * gamma LUT or CSC matrix)
312 * @plane_mask: bitmask of (1 << drm_plane_index(plane)) of attached planes
313 * @connector_mask: bitmask of (1 << drm_connector_index(connector)) of attached connectors
314 * @encoder_mask: bitmask of (1 << drm_encoder_index(encoder)) of attached encoders
315 * @last_vblank_count: for helpers and drivers to capture the vblank of the
316 * update to ensure framebuffer cleanup isn't done too early
317 * @adjusted_mode: for use by helpers and drivers to compute adjusted mode timings
318 * @mode: current mode timings
319 * @degamma_lut: Lookup table for converting framebuffer pixel data
320 * before apply the conversion matrix
321 * @ctm: Transformation matrix
322 * @gamma_lut: Lookup table for converting pixel data after the
324 * @event: optional pointer to a DRM event to signal upon completion of the
326 * @state: backpointer to global drm_atomic_state
328 * Note that the distinction between @enable and @active is rather subtile:
329 * Flipping @active while @enable is set without changing anything else may
330 * never return in a failure from the ->atomic_check callback. Userspace assumes
331 * that a DPMS On will always succeed. In other words: @enable controls resource
332 * assignment, @active controls the actual hardware state.
334 struct drm_crtc_state
{
335 struct drm_crtc
*crtc
;
340 /* computed state bits used by helpers and drivers */
341 bool planes_changed
: 1;
342 bool mode_changed
: 1;
343 bool active_changed
: 1;
344 bool connectors_changed
: 1;
345 bool color_mgmt_changed
: 1;
347 /* attached planes bitmask:
348 * WARNING: transitional helpers do not maintain plane_mask so
349 * drivers not converted over to atomic helpers should not rely
350 * on plane_mask being accurate!
357 /* last_vblank_count: for vblank waits before cleanup */
358 u32 last_vblank_count
;
360 /* adjusted_mode: for use by helpers and drivers */
361 struct drm_display_mode adjusted_mode
;
363 struct drm_display_mode mode
;
365 /* blob property to expose current mode to atomic userspace */
366 struct drm_property_blob
*mode_blob
;
368 /* blob property to expose color management to userspace */
369 struct drm_property_blob
*degamma_lut
;
370 struct drm_property_blob
*ctm
;
371 struct drm_property_blob
*gamma_lut
;
373 struct drm_pending_vblank_event
*event
;
375 struct drm_atomic_state
*state
;
379 * struct drm_crtc_funcs - control CRTCs for a given device
381 * The drm_crtc_funcs structure is the central CRTC management structure
382 * in the DRM. Each CRTC controls one or more connectors (note that the name
383 * CRTC is simply historical, a CRTC may control LVDS, VGA, DVI, TV out, etc.
384 * connectors, not just CRTs).
386 * Each driver is responsible for filling out this structure at startup time,
387 * in addition to providing other modesetting features, like i2c and DDC
390 struct drm_crtc_funcs
{
394 * Reset CRTC hardware and software state to off. This function isn't
395 * called by the core directly, only through drm_mode_config_reset().
396 * It's not a helper hook only for historical reasons.
398 * Atomic drivers can use drm_atomic_helper_crtc_reset() to reset
399 * atomic state using this hook.
401 void (*reset
)(struct drm_crtc
*crtc
);
406 * Update the cursor image. The cursor position is relative to the CRTC
407 * and can be partially or fully outside of the visible area.
409 * Note that contrary to all other KMS functions the legacy cursor entry
410 * points don't take a framebuffer object, but instead take directly a
411 * raw buffer object id from the driver's buffer manager (which is
412 * either GEM or TTM for current drivers).
414 * This entry point is deprecated, drivers should instead implement
415 * universal plane support and register a proper cursor plane using
416 * drm_crtc_init_with_planes().
418 * This callback is optional
422 * 0 on success or a negative error code on failure.
424 int (*cursor_set
)(struct drm_crtc
*crtc
, struct drm_file
*file_priv
,
425 uint32_t handle
, uint32_t width
, uint32_t height
);
430 * Update the cursor image, including hotspot information. The hotspot
431 * must not affect the cursor position in CRTC coordinates, but is only
432 * meant as a hint for virtualized display hardware to coordinate the
433 * guests and hosts cursor position. The cursor hotspot is relative to
434 * the cursor image. Otherwise this works exactly like @cursor_set.
436 * This entry point is deprecated, drivers should instead implement
437 * universal plane support and register a proper cursor plane using
438 * drm_crtc_init_with_planes().
440 * This callback is optional.
444 * 0 on success or a negative error code on failure.
446 int (*cursor_set2
)(struct drm_crtc
*crtc
, struct drm_file
*file_priv
,
447 uint32_t handle
, uint32_t width
, uint32_t height
,
448 int32_t hot_x
, int32_t hot_y
);
453 * Update the cursor position. The cursor does not need to be visible
454 * when this hook is called.
456 * This entry point is deprecated, drivers should instead implement
457 * universal plane support and register a proper cursor plane using
458 * drm_crtc_init_with_planes().
460 * This callback is optional.
464 * 0 on success or a negative error code on failure.
466 int (*cursor_move
)(struct drm_crtc
*crtc
, int x
, int y
);
471 * Set gamma on the CRTC.
473 * This callback is optional.
477 * Drivers that support gamma tables and also fbdev emulation through
478 * the provided helper library need to take care to fill out the gamma
479 * hooks for both. Currently there's a bit an unfortunate duplication
480 * going on, which should eventually be unified to just one set of
483 void (*gamma_set
)(struct drm_crtc
*crtc
, u16
*r
, u16
*g
, u16
*b
,
484 uint32_t start
, uint32_t size
);
489 * Clean up plane resources. This is only called at driver unload time
490 * through drm_mode_config_cleanup() since a CRTC cannot be hotplugged
493 void (*destroy
)(struct drm_crtc
*crtc
);
498 * This is the main legacy entry point to change the modeset state on a
499 * CRTC. All the details of the desired configuration are passed in a
500 * struct &drm_mode_set - see there for details.
502 * Drivers implementing atomic modeset should use
503 * drm_atomic_helper_set_config() to implement this hook.
507 * 0 on success or a negative error code on failure.
509 int (*set_config
)(struct drm_mode_set
*set
);
514 * Legacy entry point to schedule a flip to the given framebuffer.
516 * Page flipping is a synchronization mechanism that replaces the frame
517 * buffer being scanned out by the CRTC with a new frame buffer during
518 * vertical blanking, avoiding tearing (except when requested otherwise
519 * through the DRM_MODE_PAGE_FLIP_ASYNC flag). When an application
520 * requests a page flip the DRM core verifies that the new frame buffer
521 * is large enough to be scanned out by the CRTC in the currently
522 * configured mode and then calls the CRTC ->page_flip() operation with a
523 * pointer to the new frame buffer.
525 * The driver must wait for any pending rendering to the new framebuffer
526 * to complete before executing the flip. It should also wait for any
527 * pending rendering from other drivers if the underlying buffer is a
530 * An application can request to be notified when the page flip has
531 * completed. The drm core will supply a struct &drm_event in the event
532 * parameter in this case. This can be handled by the
533 * drm_crtc_send_vblank_event() function, which the driver should call on
534 * the provided event upon completion of the flip. Note that if
535 * the driver supports vblank signalling and timestamping the vblank
536 * counters and timestamps must agree with the ones returned from page
537 * flip events. With the current vblank helper infrastructure this can
538 * be achieved by holding a vblank reference while the page flip is
539 * pending, acquired through drm_crtc_vblank_get() and released with
540 * drm_crtc_vblank_put(). Drivers are free to implement their own vblank
541 * counter and timestamp tracking though, e.g. if they have accurate
542 * timestamp registers in hardware.
546 * Up to that point drivers need to manage events themselves and can use
547 * even->base.list freely for that. Specifically they need to ensure
548 * that they don't send out page flip (or vblank) events for which the
549 * corresponding drm file has been closed already. The drm core
550 * unfortunately does not (yet) take care of that. Therefore drivers
551 * currently must clean up and release pending events in their
552 * ->preclose driver function.
554 * This callback is optional.
558 * Very early versions of the KMS ABI mandated that the driver must
559 * block (but not reject) any rendering to the old framebuffer until the
560 * flip operation has completed and the old framebuffer is no longer
561 * visible. This requirement has been lifted, and userspace is instead
562 * expected to request delivery of an event and wait with recycling old
563 * buffers until such has been received.
567 * 0 on success or a negative error code on failure. Note that if a
568 * ->page_flip() operation is already pending the callback should return
569 * -EBUSY. Pageflips on a disabled CRTC (either by setting a NULL mode
570 * or just runtime disabled through DPMS respectively the new atomic
571 * "ACTIVE" state) should result in an -EINVAL error code. Note that
572 * drm_atomic_helper_page_flip() checks this already for atomic drivers.
574 int (*page_flip
)(struct drm_crtc
*crtc
,
575 struct drm_framebuffer
*fb
,
576 struct drm_pending_vblank_event
*event
,
582 * This is the legacy entry point to update a property attached to the
585 * Drivers implementing atomic modeset should use
586 * drm_atomic_helper_crtc_set_property() to implement this hook.
588 * This callback is optional if the driver does not support any legacy
589 * driver-private properties.
593 * 0 on success or a negative error code on failure.
595 int (*set_property
)(struct drm_crtc
*crtc
,
596 struct drm_property
*property
, uint64_t val
);
599 * @atomic_duplicate_state:
601 * Duplicate the current atomic state for this CRTC and return it.
602 * The core and helpers gurantee that any atomic state duplicated with
603 * this hook and still owned by the caller (i.e. not transferred to the
604 * driver by calling ->atomic_commit() from struct
605 * &drm_mode_config_funcs) will be cleaned up by calling the
606 * @atomic_destroy_state hook in this structure.
608 * Atomic drivers which don't subclass struct &drm_crtc should use
609 * drm_atomic_helper_crtc_duplicate_state(). Drivers that subclass the
610 * state structure to extend it with driver-private state should use
611 * __drm_atomic_helper_crtc_duplicate_state() to make sure shared state is
612 * duplicated in a consistent fashion across drivers.
614 * It is an error to call this hook before crtc->state has been
615 * initialized correctly.
619 * If the duplicate state references refcounted resources this hook must
620 * acquire a reference for each of them. The driver must release these
621 * references again in @atomic_destroy_state.
625 * Duplicated atomic state or NULL when the allocation failed.
627 struct drm_crtc_state
*(*atomic_duplicate_state
)(struct drm_crtc
*crtc
);
630 * @atomic_destroy_state:
632 * Destroy a state duplicated with @atomic_duplicate_state and release
633 * or unreference all resources it references
635 void (*atomic_destroy_state
)(struct drm_crtc
*crtc
,
636 struct drm_crtc_state
*state
);
639 * @atomic_set_property:
641 * Decode a driver-private property value and store the decoded value
642 * into the passed-in state structure. Since the atomic core decodes all
643 * standardized properties (even for extensions beyond the core set of
644 * properties which might not be implemented by all drivers) this
645 * requires drivers to subclass the state structure.
647 * Such driver-private properties should really only be implemented for
648 * truly hardware/vendor specific state. Instead it is preferred to
649 * standardize atomic extension and decode the properties used to expose
650 * such an extension in the core.
652 * Do not call this function directly, use
653 * drm_atomic_crtc_set_property() instead.
655 * This callback is optional if the driver does not support any
656 * driver-private atomic properties.
660 * This function is called in the state assembly phase of atomic
661 * modesets, which can be aborted for any reason (including on
662 * userspace's request to just check whether a configuration would be
663 * possible). Drivers MUST NOT touch any persistent state (hardware or
664 * software) or data structures except the passed in @state parameter.
666 * Also since userspace controls in which order properties are set this
667 * function must not do any input validation (since the state update is
668 * incomplete and hence likely inconsistent). Instead any such input
669 * validation must be done in the various atomic_check callbacks.
673 * 0 if the property has been found, -EINVAL if the property isn't
674 * implemented by the driver (which should never happen, the core only
675 * asks for properties attached to this CRTC). No other validation is
676 * allowed by the driver. The core already checks that the property
677 * value is within the range (integer, valid enum value, ...) the driver
678 * set when registering the property.
680 int (*atomic_set_property
)(struct drm_crtc
*crtc
,
681 struct drm_crtc_state
*state
,
682 struct drm_property
*property
,
685 * @atomic_get_property:
687 * Reads out the decoded driver-private property. This is used to
688 * implement the GETCRTC IOCTL.
690 * Do not call this function directly, use
691 * drm_atomic_crtc_get_property() instead.
693 * This callback is optional if the driver does not support any
694 * driver-private atomic properties.
698 * 0 on success, -EINVAL if the property isn't implemented by the
699 * driver (which should never happen, the core only asks for
700 * properties attached to this CRTC).
702 int (*atomic_get_property
)(struct drm_crtc
*crtc
,
703 const struct drm_crtc_state
*state
,
704 struct drm_property
*property
,
709 * struct drm_crtc - central CRTC control structure
710 * @dev: parent DRM device
711 * @port: OF node used by drm_of_find_possible_crtcs()
712 * @head: list management
713 * @mutex: per-CRTC locking
714 * @base: base KMS object for ID tracking etc.
715 * @primary: primary plane for this CRTC
716 * @cursor: cursor plane for this CRTC
717 * @cursor_x: current x position of the cursor, used for universal cursor planes
718 * @cursor_y: current y position of the cursor, used for universal cursor planes
719 * @enabled: is this CRTC enabled?
720 * @mode: current mode timings
721 * @hwmode: mode timings as programmed to hw regs
722 * @x: x position on screen
723 * @y: y position on screen
724 * @funcs: CRTC control functions
725 * @gamma_size: size of gamma ramp
726 * @gamma_store: gamma ramp values
727 * @helper_private: mid-layer private data
728 * @properties: property tracking for this CRTC
729 * @state: current atomic state for this CRTC
730 * @acquire_ctx: per-CRTC implicit acquire context used by atomic drivers for
733 * Each CRTC may have one or more connectors associated with it. This structure
734 * allows the CRTC to be controlled.
737 struct drm_device
*dev
;
738 struct device_node
*port
;
739 struct list_head head
;
746 * This provides a read lock for the overall crtc state (mode, dpms
747 * state, ...) and a write lock for everything which can be update
748 * without a full modeset (fb, cursor data, ...)
750 struct drm_modeset_lock mutex
;
752 struct drm_mode_object base
;
754 /* primary and cursor planes for CRTC */
755 struct drm_plane
*primary
;
756 struct drm_plane
*cursor
;
758 /* position of cursor plane on crtc */
764 /* Requested mode from modesetting. */
765 struct drm_display_mode mode
;
767 /* Programmed mode in hw, after adjustments for encoders,
768 * crtc, panel scaling etc. Needed for timestamping etc.
770 struct drm_display_mode hwmode
;
773 const struct drm_crtc_funcs
*funcs
;
775 /* Legacy FB CRTC gamma size for reporting to userspace */
777 uint16_t *gamma_store
;
779 /* if you are using the helper */
780 const struct drm_crtc_helper_funcs
*helper_private
;
782 struct drm_object_properties properties
;
784 struct drm_crtc_state
*state
;
787 * For legacy crtc IOCTLs so that atomic drivers can get at the locking
790 struct drm_modeset_acquire_ctx
*acquire_ctx
;
794 * struct drm_connector_state - mutable connector state
795 * @connector: backpointer to the connector
796 * @crtc: CRTC to connect connector to, NULL if disabled
797 * @best_encoder: can be used by helpers and drivers to select the encoder
798 * @state: backpointer to global drm_atomic_state
800 struct drm_connector_state
{
801 struct drm_connector
*connector
;
803 struct drm_crtc
*crtc
; /* do not write directly, use drm_atomic_set_crtc_for_connector() */
805 struct drm_encoder
*best_encoder
;
807 struct drm_atomic_state
*state
;
811 * struct drm_connector_funcs - control connectors on a given device
813 * Each CRTC may have one or more connectors attached to it. The functions
814 * below allow the core DRM code to control connectors, enumerate available modes,
817 struct drm_connector_funcs
{
821 * Legacy entry point to set the per-connector DPMS state. Legacy DPMS
822 * is exposed as a standard property on the connector, but diverted to
823 * this callback in the drm core. Note that atomic drivers don't
824 * implement the 4 level DPMS support on the connector any more, but
825 * instead only have an on/off "ACTIVE" property on the CRTC object.
827 * Drivers implementing atomic modeset should use
828 * drm_atomic_helper_connector_dpms() to implement this hook.
832 * 0 on success or a negative error code on failure.
834 int (*dpms
)(struct drm_connector
*connector
, int mode
);
839 * Reset connector hardware and software state to off. This function isn't
840 * called by the core directly, only through drm_mode_config_reset().
841 * It's not a helper hook only for historical reasons.
843 * Atomic drivers can use drm_atomic_helper_connector_reset() to reset
844 * atomic state using this hook.
846 void (*reset
)(struct drm_connector
*connector
);
851 * Check to see if anything is attached to the connector. The parameter
852 * force is set to false whilst polling, true when checking the
853 * connector due to a user request. force can be used by the driver to
854 * avoid expensive, destructive operations during automated probing.
858 * Note that this hook is only called by the probe helper. It's not in
859 * the helper library vtable purely for historical reasons. The only DRM
860 * core entry point to probe connector state is @fill_modes.
864 * drm_connector_status indicating the connector's status.
866 enum drm_connector_status (*detect
)(struct drm_connector
*connector
,
872 * This function is called to update internal encoder state when the
873 * connector is forced to a certain state by userspace, either through
874 * the sysfs interfaces or on the kernel cmdline. In that case the
875 * @detect callback isn't called.
879 * Note that this hook is only called by the probe helper. It's not in
880 * the helper library vtable purely for historical reasons. The only DRM
881 * core entry point to probe connector state is @fill_modes.
883 void (*force
)(struct drm_connector
*connector
);
888 * Entry point for output detection and basic mode validation. The
889 * driver should reprobe the output if needed (e.g. when hotplug
890 * handling is unreliable), add all detected modes to connector->modes
891 * and filter out any the device can't support in any configuration. It
892 * also needs to filter out any modes wider or higher than the
893 * parameters max_width and max_height indicate.
895 * The drivers must also prune any modes no longer valid from
896 * connector->modes. Furthermore it must update connector->status and
897 * connector->edid. If no EDID has been received for this output
898 * connector->edid must be NULL.
900 * Drivers using the probe helpers should use
901 * drm_helper_probe_single_connector_modes() or
902 * drm_helper_probe_single_connector_modes_nomerge() to implement this
907 * The number of modes detected and filled into connector->modes.
909 int (*fill_modes
)(struct drm_connector
*connector
, uint32_t max_width
, uint32_t max_height
);
914 * This is the legacy entry point to update a property attached to the
917 * Drivers implementing atomic modeset should use
918 * drm_atomic_helper_connector_set_property() to implement this hook.
920 * This callback is optional if the driver does not support any legacy
921 * driver-private properties.
925 * 0 on success or a negative error code on failure.
927 int (*set_property
)(struct drm_connector
*connector
, struct drm_property
*property
,
933 * Clean up connector resources. This is called at driver unload time
934 * through drm_mode_config_cleanup(). It can also be called at runtime
935 * when a connector is being hot-unplugged for drivers that support
936 * connector hotplugging (e.g. DisplayPort MST).
938 void (*destroy
)(struct drm_connector
*connector
);
941 * @atomic_duplicate_state:
943 * Duplicate the current atomic state for this connector and return it.
944 * The core and helpers gurantee that any atomic state duplicated with
945 * this hook and still owned by the caller (i.e. not transferred to the
946 * driver by calling ->atomic_commit() from struct
947 * &drm_mode_config_funcs) will be cleaned up by calling the
948 * @atomic_destroy_state hook in this structure.
950 * Atomic drivers which don't subclass struct &drm_connector_state should use
951 * drm_atomic_helper_connector_duplicate_state(). Drivers that subclass the
952 * state structure to extend it with driver-private state should use
953 * __drm_atomic_helper_connector_duplicate_state() to make sure shared state is
954 * duplicated in a consistent fashion across drivers.
956 * It is an error to call this hook before connector->state has been
957 * initialized correctly.
961 * If the duplicate state references refcounted resources this hook must
962 * acquire a reference for each of them. The driver must release these
963 * references again in @atomic_destroy_state.
967 * Duplicated atomic state or NULL when the allocation failed.
969 struct drm_connector_state
*(*atomic_duplicate_state
)(struct drm_connector
*connector
);
972 * @atomic_destroy_state:
974 * Destroy a state duplicated with @atomic_duplicate_state and release
975 * or unreference all resources it references
977 void (*atomic_destroy_state
)(struct drm_connector
*connector
,
978 struct drm_connector_state
*state
);
981 * @atomic_set_property:
983 * Decode a driver-private property value and store the decoded value
984 * into the passed-in state structure. Since the atomic core decodes all
985 * standardized properties (even for extensions beyond the core set of
986 * properties which might not be implemented by all drivers) this
987 * requires drivers to subclass the state structure.
989 * Such driver-private properties should really only be implemented for
990 * truly hardware/vendor specific state. Instead it is preferred to
991 * standardize atomic extension and decode the properties used to expose
992 * such an extension in the core.
994 * Do not call this function directly, use
995 * drm_atomic_connector_set_property() instead.
997 * This callback is optional if the driver does not support any
998 * driver-private atomic properties.
1002 * This function is called in the state assembly phase of atomic
1003 * modesets, which can be aborted for any reason (including on
1004 * userspace's request to just check whether a configuration would be
1005 * possible). Drivers MUST NOT touch any persistent state (hardware or
1006 * software) or data structures except the passed in @state parameter.
1008 * Also since userspace controls in which order properties are set this
1009 * function must not do any input validation (since the state update is
1010 * incomplete and hence likely inconsistent). Instead any such input
1011 * validation must be done in the various atomic_check callbacks.
1015 * 0 if the property has been found, -EINVAL if the property isn't
1016 * implemented by the driver (which shouldn't ever happen, the core only
1017 * asks for properties attached to this connector). No other validation
1018 * is allowed by the driver. The core already checks that the property
1019 * value is within the range (integer, valid enum value, ...) the driver
1020 * set when registering the property.
1022 int (*atomic_set_property
)(struct drm_connector
*connector
,
1023 struct drm_connector_state
*state
,
1024 struct drm_property
*property
,
1028 * @atomic_get_property:
1030 * Reads out the decoded driver-private property. This is used to
1031 * implement the GETCONNECTOR IOCTL.
1033 * Do not call this function directly, use
1034 * drm_atomic_connector_get_property() instead.
1036 * This callback is optional if the driver does not support any
1037 * driver-private atomic properties.
1041 * 0 on success, -EINVAL if the property isn't implemented by the
1042 * driver (which shouldn't ever happen, the core only asks for
1043 * properties attached to this connector).
1045 int (*atomic_get_property
)(struct drm_connector
*connector
,
1046 const struct drm_connector_state
*state
,
1047 struct drm_property
*property
,
1052 * struct drm_encoder_funcs - encoder controls
1054 * Encoders sit between CRTCs and connectors.
1056 struct drm_encoder_funcs
{
1060 * Reset encoder hardware and software state to off. This function isn't
1061 * called by the core directly, only through drm_mode_config_reset().
1062 * It's not a helper hook only for historical reasons.
1064 void (*reset
)(struct drm_encoder
*encoder
);
1069 * Clean up encoder resources. This is only called at driver unload time
1070 * through drm_mode_config_cleanup() since an encoder cannot be
1071 * hotplugged in DRM.
1073 void (*destroy
)(struct drm_encoder
*encoder
);
1076 #define DRM_CONNECTOR_MAX_ENCODER 3
1079 * struct drm_encoder - central DRM encoder structure
1080 * @dev: parent DRM device
1081 * @head: list management
1082 * @base: base KMS object
1083 * @name: encoder name
1084 * @encoder_type: one of the %DRM_MODE_ENCODER_<foo> types in drm_mode.h
1085 * @possible_crtcs: bitmask of potential CRTC bindings
1086 * @possible_clones: bitmask of potential sibling encoders for cloning
1087 * @crtc: currently bound CRTC
1088 * @bridge: bridge associated to the encoder
1089 * @funcs: control functions
1090 * @helper_private: mid-layer private data
1092 * CRTCs drive pixels to encoders, which convert them into signals
1093 * appropriate for a given connector or set of connectors.
1095 struct drm_encoder
{
1096 struct drm_device
*dev
;
1097 struct list_head head
;
1099 struct drm_mode_object base
;
1102 uint32_t possible_crtcs
;
1103 uint32_t possible_clones
;
1105 struct drm_crtc
*crtc
;
1106 struct drm_bridge
*bridge
;
1107 const struct drm_encoder_funcs
*funcs
;
1108 const struct drm_encoder_helper_funcs
*helper_private
;
1111 /* should we poll this connector for connects and disconnects */
1112 /* hot plug detectable */
1113 #define DRM_CONNECTOR_POLL_HPD (1 << 0)
1114 /* poll for connections */
1115 #define DRM_CONNECTOR_POLL_CONNECT (1 << 1)
1116 /* can cleanly poll for disconnections without flickering the screen */
1117 /* DACs should rarely do this without a lot of testing */
1118 #define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)
1120 #define MAX_ELD_BYTES 128
1123 * struct drm_connector - central DRM connector control structure
1124 * @dev: parent DRM device
1125 * @kdev: kernel device for sysfs attributes
1126 * @attr: sysfs attributes
1127 * @head: list management
1128 * @base: base KMS object
1129 * @name: connector name
1130 * @connector_type: one of the %DRM_MODE_CONNECTOR_<foo> types from drm_mode.h
1131 * @connector_type_id: index into connector type enum
1132 * @interlace_allowed: can this connector handle interlaced modes?
1133 * @doublescan_allowed: can this connector handle doublescan?
1134 * @stereo_allowed: can this connector handle stereo modes?
1135 * @modes: modes available on this connector (from fill_modes() + user)
1136 * @status: one of the drm_connector_status enums (connected, not, or unknown)
1137 * @probed_modes: list of modes derived directly from the display
1138 * @display_info: information about attached display (e.g. from EDID)
1139 * @funcs: connector control functions
1140 * @edid_blob_ptr: DRM property containing EDID if present
1141 * @properties: property tracking for this connector
1142 * @path_blob_ptr: DRM blob property data for the DP MST path property
1143 * @polled: a %DRM_CONNECTOR_POLL_<foo> value for core driven polling
1144 * @dpms: current dpms state
1145 * @helper_private: mid-layer private data
1146 * @cmdline_mode: mode line parsed from the kernel cmdline for this connector
1147 * @force: a %DRM_FORCE_<foo> state for forced mode sets
1148 * @override_edid: has the EDID been overwritten through debugfs for testing?
1149 * @encoder_ids: valid encoders for this connector
1150 * @encoder: encoder driving this connector, if any
1151 * @eld: EDID-like data, if present
1152 * @dvi_dual: dual link DVI, if found
1153 * @max_tmds_clock: max clock rate, if found
1154 * @latency_present: AV delay info from ELD, if found
1155 * @video_latency: video latency info from ELD, if found
1156 * @audio_latency: audio latency info from ELD, if found
1157 * @null_edid_counter: track sinks that give us all zeros for the EDID
1158 * @bad_edid_counter: track sinks that give us an EDID with invalid checksum
1159 * @edid_corrupt: indicates whether the last read EDID was corrupt
1160 * @debugfs_entry: debugfs directory for this connector
1161 * @state: current atomic state for this connector
1162 * @has_tile: is this connector connected to a tiled monitor
1163 * @tile_group: tile group for the connected monitor
1164 * @tile_is_single_monitor: whether the tile is one monitor housing
1165 * @num_h_tile: number of horizontal tiles in the tile group
1166 * @num_v_tile: number of vertical tiles in the tile group
1167 * @tile_h_loc: horizontal location of this tile
1168 * @tile_v_loc: vertical location of this tile
1169 * @tile_h_size: horizontal size of this tile.
1170 * @tile_v_size: vertical size of this tile.
1172 * Each connector may be connected to one or more CRTCs, or may be clonable by
1173 * another connector if they can share a CRTC. Each connector also has a specific
1174 * position in the broader display (referred to as a 'screen' though it could
1175 * span multiple monitors).
1177 struct drm_connector
{
1178 struct drm_device
*dev
;
1179 struct device
*kdev
;
1180 struct device_attribute
*attr
;
1181 struct list_head head
;
1183 struct drm_mode_object base
;
1188 int connector_type_id
;
1189 bool interlace_allowed
;
1190 bool doublescan_allowed
;
1191 bool stereo_allowed
;
1192 struct list_head modes
; /* list of modes on this connector */
1194 enum drm_connector_status status
;
1196 /* these are modes added by probing with DDC or the BIOS */
1197 struct list_head probed_modes
;
1199 struct drm_display_info display_info
;
1200 const struct drm_connector_funcs
*funcs
;
1202 struct drm_property_blob
*edid_blob_ptr
;
1203 struct drm_object_properties properties
;
1205 struct drm_property_blob
*path_blob_ptr
;
1207 struct drm_property_blob
*tile_blob_ptr
;
1209 uint8_t polled
; /* DRM_CONNECTOR_POLL_* */
1211 /* requested DPMS state */
1214 const struct drm_connector_helper_funcs
*helper_private
;
1216 /* forced on connector */
1217 struct drm_cmdline_mode cmdline_mode
;
1218 enum drm_connector_force force
;
1220 uint32_t encoder_ids
[DRM_CONNECTOR_MAX_ENCODER
];
1221 struct drm_encoder
*encoder
; /* currently active encoder */
1224 uint8_t eld
[MAX_ELD_BYTES
];
1226 int max_tmds_clock
; /* in MHz */
1227 bool latency_present
[2];
1228 int video_latency
[2]; /* [0]: progressive, [1]: interlaced */
1229 int audio_latency
[2];
1230 int null_edid_counter
; /* needed to workaround some HW bugs where we get all 0s */
1231 unsigned bad_edid_counter
;
1233 /* Flag for raw EDID header corruption - used in Displayport
1234 * compliance testing - * Displayport Link CTS Core 1.2 rev1.1 4.2.2.6
1238 struct dentry
*debugfs_entry
;
1240 struct drm_connector_state
*state
;
1242 /* DisplayID bits */
1244 struct drm_tile_group
*tile_group
;
1245 bool tile_is_single_monitor
;
1247 uint8_t num_h_tile
, num_v_tile
;
1248 uint8_t tile_h_loc
, tile_v_loc
;
1249 uint16_t tile_h_size
, tile_v_size
;
1253 * struct drm_plane_state - mutable plane state
1254 * @plane: backpointer to the plane
1255 * @crtc: currently bound CRTC, NULL if disabled
1256 * @fb: currently bound framebuffer
1257 * @fence: optional fence to wait for before scanning out @fb
1258 * @crtc_x: left position of visible portion of plane on crtc
1259 * @crtc_y: upper position of visible portion of plane on crtc
1260 * @crtc_w: width of visible portion of plane on crtc
1261 * @crtc_h: height of visible portion of plane on crtc
1262 * @src_x: left position of visible portion of plane within
1264 * @src_y: upper position of visible portion of plane within
1266 * @src_w: width of visible portion of plane (in 16.16)
1267 * @src_h: height of visible portion of plane (in 16.16)
1268 * @state: backpointer to global drm_atomic_state
1270 struct drm_plane_state
{
1271 struct drm_plane
*plane
;
1273 struct drm_crtc
*crtc
; /* do not write directly, use drm_atomic_set_crtc_for_plane() */
1274 struct drm_framebuffer
*fb
; /* do not write directly, use drm_atomic_set_fb_for_plane() */
1275 struct fence
*fence
;
1277 /* Signed dest location allows it to be partially off screen */
1278 int32_t crtc_x
, crtc_y
;
1279 uint32_t crtc_w
, crtc_h
;
1281 /* Source values are 16.16 fixed point */
1282 uint32_t src_x
, src_y
;
1283 uint32_t src_h
, src_w
;
1285 /* Plane rotation */
1286 unsigned int rotation
;
1288 struct drm_atomic_state
*state
;
1293 * struct drm_plane_funcs - driver plane control functions
1295 struct drm_plane_funcs
{
1299 * This is the legacy entry point to enable and configure the plane for
1300 * the given CRTC and framebuffer. It is never called to disable the
1301 * plane, i.e. the passed-in crtc and fb paramters are never NULL.
1303 * The source rectangle in frame buffer memory coordinates is given by
1304 * the src_x, src_y, src_w and src_h parameters (as 16.16 fixed point
1305 * values). Devices that don't support subpixel plane coordinates can
1306 * ignore the fractional part.
1308 * The destination rectangle in CRTC coordinates is given by the
1309 * crtc_x, crtc_y, crtc_w and crtc_h parameters (as integer values).
1310 * Devices scale the source rectangle to the destination rectangle. If
1311 * scaling is not supported, and the source rectangle size doesn't match
1312 * the destination rectangle size, the driver must return a
1313 * -<errorname>EINVAL</errorname> error.
1315 * Drivers implementing atomic modeset should use
1316 * drm_atomic_helper_update_plane() to implement this hook.
1320 * 0 on success or a negative error code on failure.
1322 int (*update_plane
)(struct drm_plane
*plane
,
1323 struct drm_crtc
*crtc
, struct drm_framebuffer
*fb
,
1324 int crtc_x
, int crtc_y
,
1325 unsigned int crtc_w
, unsigned int crtc_h
,
1326 uint32_t src_x
, uint32_t src_y
,
1327 uint32_t src_w
, uint32_t src_h
);
1332 * This is the legacy entry point to disable the plane. The DRM core
1333 * calls this method in response to a DRM_IOCTL_MODE_SETPLANE IOCTL call
1334 * with the frame buffer ID set to 0. Disabled planes must not be
1335 * processed by the CRTC.
1337 * Drivers implementing atomic modeset should use
1338 * drm_atomic_helper_disable_plane() to implement this hook.
1342 * 0 on success or a negative error code on failure.
1344 int (*disable_plane
)(struct drm_plane
*plane
);
1349 * Clean up plane resources. This is only called at driver unload time
1350 * through drm_mode_config_cleanup() since a plane cannot be hotplugged
1353 void (*destroy
)(struct drm_plane
*plane
);
1358 * Reset plane hardware and software state to off. This function isn't
1359 * called by the core directly, only through drm_mode_config_reset().
1360 * It's not a helper hook only for historical reasons.
1362 * Atomic drivers can use drm_atomic_helper_plane_reset() to reset
1363 * atomic state using this hook.
1365 void (*reset
)(struct drm_plane
*plane
);
1370 * This is the legacy entry point to update a property attached to the
1373 * Drivers implementing atomic modeset should use
1374 * drm_atomic_helper_plane_set_property() to implement this hook.
1376 * This callback is optional if the driver does not support any legacy
1377 * driver-private properties.
1381 * 0 on success or a negative error code on failure.
1383 int (*set_property
)(struct drm_plane
*plane
,
1384 struct drm_property
*property
, uint64_t val
);
1387 * @atomic_duplicate_state:
1389 * Duplicate the current atomic state for this plane and return it.
1390 * The core and helpers gurantee that any atomic state duplicated with
1391 * this hook and still owned by the caller (i.e. not transferred to the
1392 * driver by calling ->atomic_commit() from struct
1393 * &drm_mode_config_funcs) will be cleaned up by calling the
1394 * @atomic_destroy_state hook in this structure.
1396 * Atomic drivers which don't subclass struct &drm_plane_state should use
1397 * drm_atomic_helper_plane_duplicate_state(). Drivers that subclass the
1398 * state structure to extend it with driver-private state should use
1399 * __drm_atomic_helper_plane_duplicate_state() to make sure shared state is
1400 * duplicated in a consistent fashion across drivers.
1402 * It is an error to call this hook before plane->state has been
1403 * initialized correctly.
1407 * If the duplicate state references refcounted resources this hook must
1408 * acquire a reference for each of them. The driver must release these
1409 * references again in @atomic_destroy_state.
1413 * Duplicated atomic state or NULL when the allocation failed.
1415 struct drm_plane_state
*(*atomic_duplicate_state
)(struct drm_plane
*plane
);
1418 * @atomic_destroy_state:
1420 * Destroy a state duplicated with @atomic_duplicate_state and release
1421 * or unreference all resources it references
1423 void (*atomic_destroy_state
)(struct drm_plane
*plane
,
1424 struct drm_plane_state
*state
);
1427 * @atomic_set_property:
1429 * Decode a driver-private property value and store the decoded value
1430 * into the passed-in state structure. Since the atomic core decodes all
1431 * standardized properties (even for extensions beyond the core set of
1432 * properties which might not be implemented by all drivers) this
1433 * requires drivers to subclass the state structure.
1435 * Such driver-private properties should really only be implemented for
1436 * truly hardware/vendor specific state. Instead it is preferred to
1437 * standardize atomic extension and decode the properties used to expose
1438 * such an extension in the core.
1440 * Do not call this function directly, use
1441 * drm_atomic_plane_set_property() instead.
1443 * This callback is optional if the driver does not support any
1444 * driver-private atomic properties.
1448 * This function is called in the state assembly phase of atomic
1449 * modesets, which can be aborted for any reason (including on
1450 * userspace's request to just check whether a configuration would be
1451 * possible). Drivers MUST NOT touch any persistent state (hardware or
1452 * software) or data structures except the passed in @state parameter.
1454 * Also since userspace controls in which order properties are set this
1455 * function must not do any input validation (since the state update is
1456 * incomplete and hence likely inconsistent). Instead any such input
1457 * validation must be done in the various atomic_check callbacks.
1461 * 0 if the property has been found, -EINVAL if the property isn't
1462 * implemented by the driver (which shouldn't ever happen, the core only
1463 * asks for properties attached to this plane). No other validation is
1464 * allowed by the driver. The core already checks that the property
1465 * value is within the range (integer, valid enum value, ...) the driver
1466 * set when registering the property.
1468 int (*atomic_set_property
)(struct drm_plane
*plane
,
1469 struct drm_plane_state
*state
,
1470 struct drm_property
*property
,
1474 * @atomic_get_property:
1476 * Reads out the decoded driver-private property. This is used to
1477 * implement the GETPLANE IOCTL.
1479 * Do not call this function directly, use
1480 * drm_atomic_plane_get_property() instead.
1482 * This callback is optional if the driver does not support any
1483 * driver-private atomic properties.
1487 * 0 on success, -EINVAL if the property isn't implemented by the
1488 * driver (which should never happen, the core only asks for
1489 * properties attached to this plane).
1491 int (*atomic_get_property
)(struct drm_plane
*plane
,
1492 const struct drm_plane_state
*state
,
1493 struct drm_property
*property
,
1497 enum drm_plane_type
{
1498 DRM_PLANE_TYPE_OVERLAY
,
1499 DRM_PLANE_TYPE_PRIMARY
,
1500 DRM_PLANE_TYPE_CURSOR
,
1505 * struct drm_plane - central DRM plane control structure
1506 * @dev: DRM device this plane belongs to
1507 * @head: for list management
1508 * @base: base mode object
1509 * @possible_crtcs: pipes this plane can be bound to
1510 * @format_types: array of formats supported by this plane
1511 * @format_count: number of formats supported
1512 * @format_default: driver hasn't supplied supported formats for the plane
1513 * @crtc: currently bound CRTC
1514 * @fb: currently bound fb
1515 * @old_fb: Temporary tracking of the old fb while a modeset is ongoing. Used by
1516 * drm_mode_set_config_internal() to implement correct refcounting.
1517 * @funcs: helper functions
1518 * @properties: property tracking for this plane
1519 * @type: type of plane (overlay, primary, cursor)
1520 * @state: current atomic state for this plane
1523 struct drm_device
*dev
;
1524 struct list_head head
;
1528 struct drm_modeset_lock mutex
;
1530 struct drm_mode_object base
;
1532 uint32_t possible_crtcs
;
1533 uint32_t *format_types
;
1534 unsigned int format_count
;
1535 bool format_default
;
1537 struct drm_crtc
*crtc
;
1538 struct drm_framebuffer
*fb
;
1540 struct drm_framebuffer
*old_fb
;
1542 const struct drm_plane_funcs
*funcs
;
1544 struct drm_object_properties properties
;
1546 enum drm_plane_type type
;
1548 const struct drm_plane_helper_funcs
*helper_private
;
1550 struct drm_plane_state
*state
;
1554 * struct drm_bridge_funcs - drm_bridge control functions
1555 * @attach: Called during drm_bridge_attach
1557 struct drm_bridge_funcs
{
1558 int (*attach
)(struct drm_bridge
*bridge
);
1563 * This callback is used to validate and adjust a mode. The paramater
1564 * mode is the display mode that should be fed to the next element in
1565 * the display chain, either the final &drm_connector or the next
1566 * &drm_bridge. The parameter adjusted_mode is the input mode the bridge
1567 * requires. It can be modified by this callback and does not need to
1570 * This is the only hook that allows a bridge to reject a modeset. If
1571 * this function passes all other callbacks must succeed for this
1576 * This function is called in the check phase of atomic modesets, which
1577 * can be aborted for any reason (including on userspace's request to
1578 * just check whether a configuration would be possible). Drivers MUST
1579 * NOT touch any persistent state (hardware or software) or data
1580 * structures except the passed in @state parameter.
1584 * True if an acceptable configuration is possible, false if the modeset
1585 * operation should be rejected.
1587 bool (*mode_fixup
)(struct drm_bridge
*bridge
,
1588 const struct drm_display_mode
*mode
,
1589 struct drm_display_mode
*adjusted_mode
);
1593 * This callback should disable the bridge. It is called right before
1594 * the preceding element in the display pipe is disabled. If the
1595 * preceding element is a bridge this means it's called before that
1596 * bridge's ->disable() function. If the preceding element is a
1597 * &drm_encoder it's called right before the encoder's ->disable(),
1598 * ->prepare() or ->dpms() hook from struct &drm_encoder_helper_funcs.
1600 * The bridge can assume that the display pipe (i.e. clocks and timing
1601 * signals) feeding it is still running when this callback is called.
1603 * The disable callback is optional.
1605 void (*disable
)(struct drm_bridge
*bridge
);
1610 * This callback should disable the bridge. It is called right after
1611 * the preceding element in the display pipe is disabled. If the
1612 * preceding element is a bridge this means it's called after that
1613 * bridge's ->post_disable() function. If the preceding element is a
1614 * &drm_encoder it's called right after the encoder's ->disable(),
1615 * ->prepare() or ->dpms() hook from struct &drm_encoder_helper_funcs.
1617 * The bridge must assume that the display pipe (i.e. clocks and timing
1618 * singals) feeding it is no longer running when this callback is
1621 * The post_disable callback is optional.
1623 void (*post_disable
)(struct drm_bridge
*bridge
);
1628 * This callback should set the given mode on the bridge. It is called
1629 * after the ->mode_set() callback for the preceding element in the
1630 * display pipeline has been called already. The display pipe (i.e.
1631 * clocks and timing signals) is off when this function is called.
1633 void (*mode_set
)(struct drm_bridge
*bridge
,
1634 struct drm_display_mode
*mode
,
1635 struct drm_display_mode
*adjusted_mode
);
1639 * This callback should enable the bridge. It is called right before
1640 * the preceding element in the display pipe is enabled. If the
1641 * preceding element is a bridge this means it's called before that
1642 * bridge's ->pre_enable() function. If the preceding element is a
1643 * &drm_encoder it's called right before the encoder's ->enable(),
1644 * ->commit() or ->dpms() hook from struct &drm_encoder_helper_funcs.
1646 * The display pipe (i.e. clocks and timing signals) feeding this bridge
1647 * will not yet be running when this callback is called. The bridge must
1648 * not enable the display link feeding the next bridge in the chain (if
1649 * there is one) when this callback is called.
1651 * The pre_enable callback is optional.
1653 void (*pre_enable
)(struct drm_bridge
*bridge
);
1658 * This callback should enable the bridge. It is called right after
1659 * the preceding element in the display pipe is enabled. If the
1660 * preceding element is a bridge this means it's called after that
1661 * bridge's ->enable() function. If the preceding element is a
1662 * &drm_encoder it's called right after the encoder's ->enable(),
1663 * ->commit() or ->dpms() hook from struct &drm_encoder_helper_funcs.
1665 * The bridge can assume that the display pipe (i.e. clocks and timing
1666 * signals) feeding it is running when this callback is called. This
1667 * callback must enable the display link feeding the next bridge in the
1668 * chain if there is one.
1670 * The enable callback is optional.
1672 void (*enable
)(struct drm_bridge
*bridge
);
1676 * struct drm_bridge - central DRM bridge control structure
1677 * @dev: DRM device this bridge belongs to
1678 * @encoder: encoder to which this bridge is connected
1679 * @next: the next bridge in the encoder chain
1680 * @of_node: device node pointer to the bridge
1681 * @list: to keep track of all added bridges
1682 * @funcs: control functions
1683 * @driver_private: pointer to the bridge driver's internal context
1686 struct drm_device
*dev
;
1687 struct drm_encoder
*encoder
;
1688 struct drm_bridge
*next
;
1690 struct device_node
*of_node
;
1692 struct list_head list
;
1694 const struct drm_bridge_funcs
*funcs
;
1695 void *driver_private
;
1699 * struct drm_atomic_state - the global state object for atomic updates
1700 * @dev: parent DRM device
1701 * @allow_modeset: allow full modeset
1702 * @legacy_cursor_update: hint to enforce legacy cursor IOCTL semantics
1703 * @legacy_set_config: Disable conflicting encoders instead of failing with -EINVAL.
1704 * @planes: pointer to array of plane pointers
1705 * @plane_states: pointer to array of plane states pointers
1706 * @crtcs: pointer to array of CRTC pointers
1707 * @crtc_states: pointer to array of CRTC states pointers
1708 * @num_connector: size of the @connectors and @connector_states arrays
1709 * @connectors: pointer to array of connector pointers
1710 * @connector_states: pointer to array of connector states pointers
1711 * @acquire_ctx: acquire context for this atomic modeset state update
1713 struct drm_atomic_state
{
1714 struct drm_device
*dev
;
1715 bool allow_modeset
: 1;
1716 bool legacy_cursor_update
: 1;
1717 bool legacy_set_config
: 1;
1718 struct drm_plane
**planes
;
1719 struct drm_plane_state
**plane_states
;
1720 struct drm_crtc
**crtcs
;
1721 struct drm_crtc_state
**crtc_states
;
1723 struct drm_connector
**connectors
;
1724 struct drm_connector_state
**connector_states
;
1726 struct drm_modeset_acquire_ctx
*acquire_ctx
;
1731 * struct drm_mode_set - new values for a CRTC config change
1732 * @fb: framebuffer to use for new config
1733 * @crtc: CRTC whose configuration we're about to change
1734 * @mode: mode timings to use
1735 * @x: position of this CRTC relative to @fb
1736 * @y: position of this CRTC relative to @fb
1737 * @connectors: array of connectors to drive with this CRTC if possible
1738 * @num_connectors: size of @connectors array
1740 * Represents a single crtc the connectors that it drives with what mode
1741 * and from which framebuffer it scans out from.
1743 * This is used to set modes.
1745 struct drm_mode_set
{
1746 struct drm_framebuffer
*fb
;
1747 struct drm_crtc
*crtc
;
1748 struct drm_display_mode
*mode
;
1753 struct drm_connector
**connectors
;
1754 size_t num_connectors
;
1758 * struct drm_mode_config_funcs - basic driver provided mode setting functions
1760 * Some global (i.e. not per-CRTC, connector, etc) mode setting functions that
1763 struct drm_mode_config_funcs
{
1767 * Create a new framebuffer object. The core does basic checks on the
1768 * requested metadata, but most of that is left to the driver. See
1769 * struct &drm_mode_fb_cmd2 for details.
1771 * If the parameters are deemed valid and the backing storage objects in
1772 * the underlying memory manager all exist, then the driver allocates
1773 * a new &drm_framebuffer structure, subclassed to contain
1774 * driver-specific information (like the internal native buffer object
1775 * references). It also needs to fill out all relevant metadata, which
1776 * should be done by calling drm_helper_mode_fill_fb_struct().
1778 * The initialization is finalized by calling drm_framebuffer_init(),
1779 * which registers the framebuffer and makes it accessible to other
1784 * A new framebuffer with an initial reference count of 1 or a negative
1785 * error code encoded with ERR_PTR().
1787 struct drm_framebuffer
*(*fb_create
)(struct drm_device
*dev
,
1788 struct drm_file
*file_priv
,
1789 const struct drm_mode_fb_cmd2
*mode_cmd
);
1792 * @output_poll_changed:
1794 * Callback used by helpers to inform the driver of output configuration
1797 * Drivers implementing fbdev emulation with the helpers can call
1798 * drm_fb_helper_hotplug_changed from this hook to inform the fbdev
1799 * helper of output changes.
1803 * Except that there's no vtable for device-level helper callbacks
1804 * there's no reason this is a core function.
1806 void (*output_poll_changed
)(struct drm_device
*dev
);
1811 * This is the only hook to validate an atomic modeset update. This
1812 * function must reject any modeset and state changes which the hardware
1813 * or driver doesn't support. This includes but is of course not limited
1816 * - Checking that the modes, framebuffers, scaling and placement
1817 * requirements and so on are within the limits of the hardware.
1819 * - Checking that any hidden shared resources are not oversubscribed.
1820 * This can be shared PLLs, shared lanes, overall memory bandwidth,
1821 * display fifo space (where shared between planes or maybe even
1824 * - Checking that virtualized resources exported to userspace are not
1825 * oversubscribed. For various reasons it can make sense to expose
1826 * more planes, crtcs or encoders than which are physically there. One
1827 * example is dual-pipe operations (which generally should be hidden
1828 * from userspace if when lockstepped in hardware, exposed otherwise),
1829 * where a plane might need 1 hardware plane (if it's just on one
1830 * pipe), 2 hardware planes (when it spans both pipes) or maybe even
1831 * shared a hardware plane with a 2nd plane (if there's a compatible
1832 * plane requested on the area handled by the other pipe).
1834 * - Check that any transitional state is possible and that if
1835 * requested, the update can indeed be done in the vblank period
1836 * without temporarily disabling some functions.
1838 * - Check any other constraints the driver or hardware might have.
1840 * - This callback also needs to correctly fill out the &drm_crtc_state
1841 * in this update to make sure that drm_atomic_crtc_needs_modeset()
1842 * reflects the nature of the possible update and returns true if and
1843 * only if the update cannot be applied without tearing within one
1844 * vblank on that CRTC. The core uses that information to reject
1845 * updates which require a full modeset (i.e. blanking the screen, or
1846 * at least pausing updates for a substantial amount of time) if
1847 * userspace has disallowed that in its request.
1849 * - The driver also does not need to repeat basic input validation
1850 * like done for the corresponding legacy entry points. The core does
1851 * that before calling this hook.
1853 * See the documentation of @atomic_commit for an exhaustive list of
1854 * error conditions which don't have to be checked at the
1855 * ->atomic_check() stage?
1857 * See the documentation for struct &drm_atomic_state for how exactly
1858 * an atomic modeset update is described.
1860 * Drivers using the atomic helpers can implement this hook using
1861 * drm_atomic_helper_check(), or one of the exported sub-functions of
1866 * 0 on success or one of the below negative error codes:
1868 * - -EINVAL, if any of the above constraints are violated.
1870 * - -EDEADLK, when returned from an attempt to acquire an additional
1871 * &drm_modeset_lock through drm_modeset_lock().
1873 * - -ENOMEM, if allocating additional state sub-structures failed due
1874 * to lack of memory.
1876 * - -EINTR, -EAGAIN or -ERESTARTSYS, if the IOCTL should be restarted.
1877 * This can either be due to a pending signal, or because the driver
1878 * needs to completely bail out to recover from an exceptional
1879 * situation like a GPU hang. From a userspace point all errors are
1882 int (*atomic_check
)(struct drm_device
*dev
,
1883 struct drm_atomic_state
*state
);
1888 * This is the only hook to commit an atomic modeset update. The core
1889 * guarantees that @atomic_check has been called successfully before
1890 * calling this function, and that nothing has been changed in the
1893 * See the documentation for struct &drm_atomic_state for how exactly
1894 * an atomic modeset update is described.
1896 * Drivers using the atomic helpers can implement this hook using
1897 * drm_atomic_helper_commit(), or one of the exported sub-functions of
1900 * Nonblocking commits (as indicated with the nonblock parameter) must
1901 * do any preparatory work which might result in an unsuccessful commit
1902 * in the context of this callback. The only exceptions are hardware
1903 * errors resulting in -EIO. But even in that case the driver must
1904 * ensure that the display pipe is at least running, to avoid
1905 * compositors crashing when pageflips don't work. Anything else,
1906 * specifically committing the update to the hardware, should be done
1907 * without blocking the caller. For updates which do not require a
1908 * modeset this must be guaranteed.
1910 * The driver must wait for any pending rendering to the new
1911 * framebuffers to complete before executing the flip. It should also
1912 * wait for any pending rendering from other drivers if the underlying
1913 * buffer is a shared dma-buf. Nonblocking commits must not wait for
1914 * rendering in the context of this callback.
1916 * An application can request to be notified when the atomic commit has
1917 * completed. These events are per-CRTC and can be distinguished by the
1918 * CRTC index supplied in &drm_event to userspace.
1920 * The drm core will supply a struct &drm_event in the event
1921 * member of each CRTC's &drm_crtc_state structure. This can be handled by the
1922 * drm_crtc_send_vblank_event() function, which the driver should call on
1923 * the provided event upon completion of the atomic commit. Note that if
1924 * the driver supports vblank signalling and timestamping the vblank
1925 * counters and timestamps must agree with the ones returned from page
1926 * flip events. With the current vblank helper infrastructure this can
1927 * be achieved by holding a vblank reference while the page flip is
1928 * pending, acquired through drm_crtc_vblank_get() and released with
1929 * drm_crtc_vblank_put(). Drivers are free to implement their own vblank
1930 * counter and timestamp tracking though, e.g. if they have accurate
1931 * timestamp registers in hardware.
1935 * Drivers are not allowed to shut down any display pipe successfully
1936 * enabled through an atomic commit on their own. Doing so can result in
1937 * compositors crashing if a page flip is suddenly rejected because the
1942 * 0 on success or one of the below negative error codes:
1944 * - -EBUSY, if a nonblocking updated is requested and there is
1945 * an earlier updated pending. Drivers are allowed to support a queue
1946 * of outstanding updates, but currently no driver supports that.
1947 * Note that drivers must wait for preceding updates to complete if a
1948 * synchronous update is requested, they are not allowed to fail the
1949 * commit in that case.
1951 * - -ENOMEM, if the driver failed to allocate memory. Specifically
1952 * this can happen when trying to pin framebuffers, which must only
1953 * be done when committing the state.
1955 * - -ENOSPC, as a refinement of the more generic -ENOMEM to indicate
1956 * that the driver has run out of vram, iommu space or similar GPU
1957 * address space needed for framebuffer.
1959 * - -EIO, if the hardware completely died.
1961 * - -EINTR, -EAGAIN or -ERESTARTSYS, if the IOCTL should be restarted.
1962 * This can either be due to a pending signal, or because the driver
1963 * needs to completely bail out to recover from an exceptional
1964 * situation like a GPU hang. From a userspace point of view all errors are
1967 * This list is exhaustive. Specifically this hook is not allowed to
1968 * return -EINVAL (any invalid requests should be caught in
1969 * @atomic_check) or -EDEADLK (this function must not acquire
1970 * additional modeset locks).
1972 int (*atomic_commit
)(struct drm_device
*dev
,
1973 struct drm_atomic_state
*state
,
1977 * @atomic_state_alloc:
1979 * This optional hook can be used by drivers that want to subclass struct
1980 * &drm_atomic_state to be able to track their own driver-private global
1981 * state easily. If this hook is implemented, drivers must also
1982 * implement @atomic_state_clear and @atomic_state_free.
1986 * A new &drm_atomic_state on success or NULL on failure.
1988 struct drm_atomic_state
*(*atomic_state_alloc
)(struct drm_device
*dev
);
1991 * @atomic_state_clear:
1993 * This hook must clear any driver private state duplicated into the
1994 * passed-in &drm_atomic_state. This hook is called when the caller
1995 * encountered a &drm_modeset_lock deadlock and needs to drop all
1996 * already acquired locks as part of the deadlock avoidance dance
1997 * implemented in drm_modeset_lock_backoff().
1999 * Any duplicated state must be invalidated since a concurrent atomic
2000 * update might change it, and the drm atomic interfaces always apply
2001 * updates as relative changes to the current state.
2003 * Drivers that implement this must call drm_atomic_state_default_clear()
2004 * to clear common state.
2006 void (*atomic_state_clear
)(struct drm_atomic_state
*state
);
2009 * @atomic_state_free:
2011 * This hook needs driver private resources and the &drm_atomic_state
2012 * itself. Note that the core first calls drm_atomic_state_clear() to
2013 * avoid code duplicate between the clear and free hooks.
2015 * Drivers that implement this must call drm_atomic_state_default_free()
2016 * to release common resources.
2018 void (*atomic_state_free
)(struct drm_atomic_state
*state
);
2022 * struct drm_mode_config - Mode configuration control structure
2023 * @mutex: mutex protecting KMS related lists and structures
2024 * @connection_mutex: ww mutex protecting connector state and routing
2025 * @acquire_ctx: global implicit acquire context used by atomic drivers for
2027 * @idr_mutex: mutex for KMS ID allocation and management
2028 * @crtc_idr: main KMS ID tracking object
2029 * @fb_lock: mutex to protect fb state and lists
2030 * @num_fb: number of fbs available
2031 * @fb_list: list of framebuffers available
2032 * @num_connector: number of connectors on this device
2033 * @connector_list: list of connector objects
2034 * @num_encoder: number of encoders on this device
2035 * @encoder_list: list of encoder objects
2036 * @num_overlay_plane: number of overlay planes on this device
2037 * @num_total_plane: number of universal (i.e. with primary/curso) planes on this device
2038 * @plane_list: list of plane objects
2039 * @num_crtc: number of CRTCs on this device
2040 * @crtc_list: list of CRTC objects
2041 * @property_list: list of property objects
2042 * @min_width: minimum pixel width on this device
2043 * @min_height: minimum pixel height on this device
2044 * @max_width: maximum pixel width on this device
2045 * @max_height: maximum pixel height on this device
2046 * @funcs: core driver provided mode setting functions
2047 * @fb_base: base address of the framebuffer
2048 * @poll_enabled: track polling support for this device
2049 * @poll_running: track polling status for this device
2050 * @output_poll_work: delayed work for polling in process context
2051 * @property_blob_list: list of all the blob property objects
2052 * @blob_lock: mutex for blob property allocation and management
2053 * @*_property: core property tracking
2054 * @degamma_lut_property: LUT used to convert the framebuffer's colors to linear
2056 * @degamma_lut_size_property: size of the degamma LUT as supported by the
2057 * driver (read-only)
2058 * @ctm_property: Matrix used to convert colors after the lookup in the
2060 * @gamma_lut_property: LUT used to convert the colors, after the CSC matrix, to
2061 * the gamma space of the connected screen (read-only)
2062 * @gamma_lut_size_property: size of the gamma LUT as supported by the driver
2063 * @preferred_depth: preferred RBG pixel depth, used by fb helpers
2064 * @prefer_shadow: hint to userspace to prefer shadow-fb rendering
2065 * @async_page_flip: does this device support async flips on the primary plane?
2066 * @cursor_width: hint to userspace for max cursor width
2067 * @cursor_height: hint to userspace for max cursor height
2069 * Core mode resource tracking structure. All CRTC, encoders, and connectors
2070 * enumerated by the driver are added here, as are global properties. Some
2071 * global restrictions are also here, e.g. dimension restrictions.
2073 struct drm_mode_config
{
2074 struct mutex mutex
; /* protects configuration (mode lists etc.) */
2075 struct drm_modeset_lock connection_mutex
; /* protects connector->encoder and encoder->crtc links */
2076 struct drm_modeset_acquire_ctx
*acquire_ctx
; /* for legacy _lock_all() / _unlock_all() */
2077 struct mutex idr_mutex
; /* for IDR management */
2078 struct idr crtc_idr
; /* use this idr for all IDs, fb, crtc, connector, modes - just makes life easier */
2079 struct idr tile_idr
; /* use this idr for all IDs, fb, crtc, connector, modes - just makes life easier */
2080 /* this is limited to one for now */
2082 struct mutex fb_lock
; /* proctects global and per-file fb lists */
2084 struct list_head fb_list
;
2087 struct ida connector_ida
;
2088 struct list_head connector_list
;
2090 struct list_head encoder_list
;
2093 * Track # of overlay planes separately from # of total planes. By
2094 * default we only advertise overlay planes to userspace; if userspace
2095 * sets the "universal plane" capability bit, we'll go ahead and
2096 * expose all planes.
2098 int num_overlay_plane
;
2099 int num_total_plane
;
2100 struct list_head plane_list
;
2103 struct list_head crtc_list
;
2105 struct list_head property_list
;
2107 int min_width
, min_height
;
2108 int max_width
, max_height
;
2109 const struct drm_mode_config_funcs
*funcs
;
2110 resource_size_t fb_base
;
2112 /* output poll support */
2116 struct delayed_work output_poll_work
;
2118 struct mutex blob_lock
;
2120 /* pointers to standard properties */
2121 struct list_head property_blob_list
;
2122 struct drm_property
*edid_property
;
2123 struct drm_property
*dpms_property
;
2124 struct drm_property
*path_property
;
2125 struct drm_property
*tile_property
;
2126 struct drm_property
*plane_type_property
;
2127 struct drm_property
*rotation_property
;
2128 struct drm_property
*prop_src_x
;
2129 struct drm_property
*prop_src_y
;
2130 struct drm_property
*prop_src_w
;
2131 struct drm_property
*prop_src_h
;
2132 struct drm_property
*prop_crtc_x
;
2133 struct drm_property
*prop_crtc_y
;
2134 struct drm_property
*prop_crtc_w
;
2135 struct drm_property
*prop_crtc_h
;
2136 struct drm_property
*prop_fb_id
;
2137 struct drm_property
*prop_crtc_id
;
2138 struct drm_property
*prop_active
;
2139 struct drm_property
*prop_mode_id
;
2141 /* DVI-I properties */
2142 struct drm_property
*dvi_i_subconnector_property
;
2143 struct drm_property
*dvi_i_select_subconnector_property
;
2146 struct drm_property
*tv_subconnector_property
;
2147 struct drm_property
*tv_select_subconnector_property
;
2148 struct drm_property
*tv_mode_property
;
2149 struct drm_property
*tv_left_margin_property
;
2150 struct drm_property
*tv_right_margin_property
;
2151 struct drm_property
*tv_top_margin_property
;
2152 struct drm_property
*tv_bottom_margin_property
;
2153 struct drm_property
*tv_brightness_property
;
2154 struct drm_property
*tv_contrast_property
;
2155 struct drm_property
*tv_flicker_reduction_property
;
2156 struct drm_property
*tv_overscan_property
;
2157 struct drm_property
*tv_saturation_property
;
2158 struct drm_property
*tv_hue_property
;
2160 /* Optional properties */
2161 struct drm_property
*scaling_mode_property
;
2162 struct drm_property
*aspect_ratio_property
;
2163 struct drm_property
*dirty_info_property
;
2165 /* Optional color correction properties */
2166 struct drm_property
*degamma_lut_property
;
2167 struct drm_property
*degamma_lut_size_property
;
2168 struct drm_property
*ctm_property
;
2169 struct drm_property
*gamma_lut_property
;
2170 struct drm_property
*gamma_lut_size_property
;
2172 /* properties for virtual machine layout */
2173 struct drm_property
*suggested_x_property
;
2174 struct drm_property
*suggested_y_property
;
2176 /* dumb ioctl parameters */
2177 uint32_t preferred_depth
, prefer_shadow
;
2179 /* whether async page flip is supported or not */
2180 bool async_page_flip
;
2182 /* whether the driver supports fb modifiers */
2183 bool allow_fb_modifiers
;
2186 uint32_t cursor_width
, cursor_height
;
2190 * drm_for_each_plane_mask - iterate over planes specified by bitmask
2191 * @plane: the loop cursor
2192 * @dev: the DRM device
2193 * @plane_mask: bitmask of plane indices
2195 * Iterate over all planes specified by bitmask.
2197 #define drm_for_each_plane_mask(plane, dev, plane_mask) \
2198 list_for_each_entry((plane), &(dev)->mode_config.plane_list, head) \
2199 for_each_if ((plane_mask) & (1 << drm_plane_index(plane)))
2202 * drm_for_each_encoder_mask - iterate over encoders specified by bitmask
2203 * @encoder: the loop cursor
2204 * @dev: the DRM device
2205 * @encoder_mask: bitmask of encoder indices
2207 * Iterate over all encoders specified by bitmask.
2209 #define drm_for_each_encoder_mask(encoder, dev, encoder_mask) \
2210 list_for_each_entry((encoder), &(dev)->mode_config.encoder_list, head) \
2211 for_each_if ((encoder_mask) & (1 << drm_encoder_index(encoder)))
2213 #define obj_to_crtc(x) container_of(x, struct drm_crtc, base)
2214 #define obj_to_connector(x) container_of(x, struct drm_connector, base)
2215 #define obj_to_encoder(x) container_of(x, struct drm_encoder, base)
2216 #define obj_to_mode(x) container_of(x, struct drm_display_mode, base)
2217 #define obj_to_fb(x) container_of(x, struct drm_framebuffer, base)
2218 #define obj_to_property(x) container_of(x, struct drm_property, base)
2219 #define obj_to_blob(x) container_of(x, struct drm_property_blob, base)
2220 #define obj_to_plane(x) container_of(x, struct drm_plane, base)
2222 struct drm_prop_enum_list
{
2227 extern __printf(6, 7)
2228 int drm_crtc_init_with_planes(struct drm_device
*dev
,
2229 struct drm_crtc
*crtc
,
2230 struct drm_plane
*primary
,
2231 struct drm_plane
*cursor
,
2232 const struct drm_crtc_funcs
*funcs
,
2233 const char *name
, ...);
2234 extern void drm_crtc_cleanup(struct drm_crtc
*crtc
);
2235 extern unsigned int drm_crtc_index(struct drm_crtc
*crtc
);
2238 * drm_crtc_mask - find the mask of a registered CRTC
2239 * @crtc: CRTC to find mask for
2241 * Given a registered CRTC, return the mask bit of that CRTC for an
2242 * encoder's possible_crtcs field.
2244 static inline uint32_t drm_crtc_mask(struct drm_crtc
*crtc
)
2246 return 1 << drm_crtc_index(crtc
);
2249 extern void drm_connector_ida_init(void);
2250 extern void drm_connector_ida_destroy(void);
2251 extern int drm_connector_init(struct drm_device
*dev
,
2252 struct drm_connector
*connector
,
2253 const struct drm_connector_funcs
*funcs
,
2254 int connector_type
);
2255 int drm_connector_register(struct drm_connector
*connector
);
2256 void drm_connector_unregister(struct drm_connector
*connector
);
2258 extern void drm_connector_cleanup(struct drm_connector
*connector
);
2259 static inline unsigned drm_connector_index(struct drm_connector
*connector
)
2261 return connector
->connector_id
;
2264 /* helpers to {un}register all connectors from sysfs for device */
2265 extern int drm_connector_register_all(struct drm_device
*dev
);
2266 extern void drm_connector_unregister_all(struct drm_device
*dev
);
2268 extern int drm_bridge_add(struct drm_bridge
*bridge
);
2269 extern void drm_bridge_remove(struct drm_bridge
*bridge
);
2270 extern struct drm_bridge
*of_drm_find_bridge(struct device_node
*np
);
2271 extern int drm_bridge_attach(struct drm_device
*dev
, struct drm_bridge
*bridge
);
2273 bool drm_bridge_mode_fixup(struct drm_bridge
*bridge
,
2274 const struct drm_display_mode
*mode
,
2275 struct drm_display_mode
*adjusted_mode
);
2276 void drm_bridge_disable(struct drm_bridge
*bridge
);
2277 void drm_bridge_post_disable(struct drm_bridge
*bridge
);
2278 void drm_bridge_mode_set(struct drm_bridge
*bridge
,
2279 struct drm_display_mode
*mode
,
2280 struct drm_display_mode
*adjusted_mode
);
2281 void drm_bridge_pre_enable(struct drm_bridge
*bridge
);
2282 void drm_bridge_enable(struct drm_bridge
*bridge
);
2284 extern __printf(5, 6)
2285 int drm_encoder_init(struct drm_device
*dev
,
2286 struct drm_encoder
*encoder
,
2287 const struct drm_encoder_funcs
*funcs
,
2288 int encoder_type
, const char *name
, ...);
2289 extern unsigned int drm_encoder_index(struct drm_encoder
*encoder
);
2292 * drm_encoder_crtc_ok - can a given crtc drive a given encoder?
2293 * @encoder: encoder to test
2294 * @crtc: crtc to test
2296 * Return false if @encoder can't be driven by @crtc, true otherwise.
2298 static inline bool drm_encoder_crtc_ok(struct drm_encoder
*encoder
,
2299 struct drm_crtc
*crtc
)
2301 return !!(encoder
->possible_crtcs
& drm_crtc_mask(crtc
));
2304 extern __printf(8, 9)
2305 int drm_universal_plane_init(struct drm_device
*dev
,
2306 struct drm_plane
*plane
,
2307 unsigned long possible_crtcs
,
2308 const struct drm_plane_funcs
*funcs
,
2309 const uint32_t *formats
,
2310 unsigned int format_count
,
2311 enum drm_plane_type type
,
2312 const char *name
, ...);
2313 extern int drm_plane_init(struct drm_device
*dev
,
2314 struct drm_plane
*plane
,
2315 unsigned long possible_crtcs
,
2316 const struct drm_plane_funcs
*funcs
,
2317 const uint32_t *formats
, unsigned int format_count
,
2319 extern void drm_plane_cleanup(struct drm_plane
*plane
);
2320 extern unsigned int drm_plane_index(struct drm_plane
*plane
);
2321 extern struct drm_plane
* drm_plane_from_index(struct drm_device
*dev
, int idx
);
2322 extern void drm_plane_force_disable(struct drm_plane
*plane
);
2323 extern int drm_plane_check_pixel_format(const struct drm_plane
*plane
,
2325 extern void drm_crtc_get_hv_timing(const struct drm_display_mode
*mode
,
2326 int *hdisplay
, int *vdisplay
);
2327 extern int drm_crtc_check_viewport(const struct drm_crtc
*crtc
,
2329 const struct drm_display_mode
*mode
,
2330 const struct drm_framebuffer
*fb
);
2332 extern void drm_encoder_cleanup(struct drm_encoder
*encoder
);
2334 extern const char *drm_get_connector_status_name(enum drm_connector_status status
);
2335 extern const char *drm_get_subpixel_order_name(enum subpixel_order order
);
2336 extern const char *drm_get_dpms_name(int val
);
2337 extern const char *drm_get_dvi_i_subconnector_name(int val
);
2338 extern const char *drm_get_dvi_i_select_name(int val
);
2339 extern const char *drm_get_tv_subconnector_name(int val
);
2340 extern const char *drm_get_tv_select_name(int val
);
2341 extern void drm_fb_release(struct drm_file
*file_priv
);
2342 extern void drm_property_destroy_user_blobs(struct drm_device
*dev
,
2343 struct drm_file
*file_priv
);
2344 extern bool drm_probe_ddc(struct i2c_adapter
*adapter
);
2345 extern struct edid
*drm_get_edid(struct drm_connector
*connector
,
2346 struct i2c_adapter
*adapter
);
2347 extern struct edid
*drm_get_edid_switcheroo(struct drm_connector
*connector
,
2348 struct i2c_adapter
*adapter
);
2349 extern struct edid
*drm_edid_duplicate(const struct edid
*edid
);
2350 extern int drm_add_edid_modes(struct drm_connector
*connector
, struct edid
*edid
);
2351 extern void drm_mode_config_init(struct drm_device
*dev
);
2352 extern void drm_mode_config_reset(struct drm_device
*dev
);
2353 extern void drm_mode_config_cleanup(struct drm_device
*dev
);
2355 extern int drm_mode_connector_set_path_property(struct drm_connector
*connector
,
2357 int drm_mode_connector_set_tile_property(struct drm_connector
*connector
);
2358 extern int drm_mode_connector_update_edid_property(struct drm_connector
*connector
,
2359 const struct edid
*edid
);
2361 extern int drm_display_info_set_bus_formats(struct drm_display_info
*info
,
2363 unsigned int num_formats
);
2365 static inline bool drm_property_type_is(struct drm_property
*property
,
2368 /* instanceof for props.. handles extended type vs original types: */
2369 if (property
->flags
& DRM_MODE_PROP_EXTENDED_TYPE
)
2370 return (property
->flags
& DRM_MODE_PROP_EXTENDED_TYPE
) == type
;
2371 return property
->flags
& type
;
2374 static inline bool drm_property_type_valid(struct drm_property
*property
)
2376 if (property
->flags
& DRM_MODE_PROP_EXTENDED_TYPE
)
2377 return !(property
->flags
& DRM_MODE_PROP_LEGACY_TYPE
);
2378 return !!(property
->flags
& DRM_MODE_PROP_LEGACY_TYPE
);
2381 extern int drm_object_property_set_value(struct drm_mode_object
*obj
,
2382 struct drm_property
*property
,
2384 extern int drm_object_property_get_value(struct drm_mode_object
*obj
,
2385 struct drm_property
*property
,
2387 extern int drm_framebuffer_init(struct drm_device
*dev
,
2388 struct drm_framebuffer
*fb
,
2389 const struct drm_framebuffer_funcs
*funcs
);
2390 extern struct drm_framebuffer
*drm_framebuffer_lookup(struct drm_device
*dev
,
2392 extern void drm_framebuffer_remove(struct drm_framebuffer
*fb
);
2393 extern void drm_framebuffer_cleanup(struct drm_framebuffer
*fb
);
2394 extern void drm_framebuffer_unregister_private(struct drm_framebuffer
*fb
);
2396 extern void drm_object_attach_property(struct drm_mode_object
*obj
,
2397 struct drm_property
*property
,
2399 extern struct drm_property
*drm_property_create(struct drm_device
*dev
, int flags
,
2400 const char *name
, int num_values
);
2401 extern struct drm_property
*drm_property_create_enum(struct drm_device
*dev
, int flags
,
2403 const struct drm_prop_enum_list
*props
,
2405 struct drm_property
*drm_property_create_bitmask(struct drm_device
*dev
,
2406 int flags
, const char *name
,
2407 const struct drm_prop_enum_list
*props
,
2409 uint64_t supported_bits
);
2410 struct drm_property
*drm_property_create_range(struct drm_device
*dev
, int flags
,
2412 uint64_t min
, uint64_t max
);
2413 struct drm_property
*drm_property_create_signed_range(struct drm_device
*dev
,
2414 int flags
, const char *name
,
2415 int64_t min
, int64_t max
);
2416 struct drm_property
*drm_property_create_object(struct drm_device
*dev
,
2417 int flags
, const char *name
, uint32_t type
);
2418 struct drm_property
*drm_property_create_bool(struct drm_device
*dev
, int flags
,
2420 struct drm_property_blob
*drm_property_create_blob(struct drm_device
*dev
,
2423 struct drm_property_blob
*drm_property_lookup_blob(struct drm_device
*dev
,
2425 struct drm_property_blob
*drm_property_reference_blob(struct drm_property_blob
*blob
);
2426 void drm_property_unreference_blob(struct drm_property_blob
*blob
);
2427 extern void drm_property_destroy(struct drm_device
*dev
, struct drm_property
*property
);
2428 extern int drm_property_add_enum(struct drm_property
*property
, int index
,
2429 uint64_t value
, const char *name
);
2430 extern int drm_mode_create_dvi_i_properties(struct drm_device
*dev
);
2431 extern int drm_mode_create_tv_properties(struct drm_device
*dev
,
2432 unsigned int num_modes
,
2433 const char * const modes
[]);
2434 extern int drm_mode_create_scaling_mode_property(struct drm_device
*dev
);
2435 extern int drm_mode_create_aspect_ratio_property(struct drm_device
*dev
);
2436 extern int drm_mode_create_dirty_info_property(struct drm_device
*dev
);
2437 extern int drm_mode_create_suggested_offset_properties(struct drm_device
*dev
);
2438 extern bool drm_property_change_valid_get(struct drm_property
*property
,
2439 uint64_t value
, struct drm_mode_object
**ref
);
2440 extern void drm_property_change_valid_put(struct drm_property
*property
,
2441 struct drm_mode_object
*ref
);
2443 extern int drm_mode_connector_attach_encoder(struct drm_connector
*connector
,
2444 struct drm_encoder
*encoder
);
2445 extern int drm_mode_crtc_set_gamma_size(struct drm_crtc
*crtc
,
2447 extern struct drm_mode_object
*drm_mode_object_find(struct drm_device
*dev
,
2448 uint32_t id
, uint32_t type
);
2449 void drm_mode_object_reference(struct drm_mode_object
*obj
);
2450 void drm_mode_object_unreference(struct drm_mode_object
*obj
);
2453 extern int drm_mode_getresources(struct drm_device
*dev
,
2454 void *data
, struct drm_file
*file_priv
);
2455 extern int drm_mode_getplane_res(struct drm_device
*dev
, void *data
,
2456 struct drm_file
*file_priv
);
2457 extern int drm_mode_getcrtc(struct drm_device
*dev
,
2458 void *data
, struct drm_file
*file_priv
);
2459 extern int drm_mode_getconnector(struct drm_device
*dev
,
2460 void *data
, struct drm_file
*file_priv
);
2461 extern int drm_mode_set_config_internal(struct drm_mode_set
*set
);
2462 extern int drm_mode_setcrtc(struct drm_device
*dev
,
2463 void *data
, struct drm_file
*file_priv
);
2464 extern int drm_mode_getplane(struct drm_device
*dev
,
2465 void *data
, struct drm_file
*file_priv
);
2466 extern int drm_mode_setplane(struct drm_device
*dev
,
2467 void *data
, struct drm_file
*file_priv
);
2468 extern int drm_mode_cursor_ioctl(struct drm_device
*dev
,
2469 void *data
, struct drm_file
*file_priv
);
2470 extern int drm_mode_cursor2_ioctl(struct drm_device
*dev
,
2471 void *data
, struct drm_file
*file_priv
);
2472 extern int drm_mode_addfb(struct drm_device
*dev
,
2473 void *data
, struct drm_file
*file_priv
);
2474 extern int drm_mode_addfb2(struct drm_device
*dev
,
2475 void *data
, struct drm_file
*file_priv
);
2476 extern uint32_t drm_mode_legacy_fb_format(uint32_t bpp
, uint32_t depth
);
2477 extern int drm_mode_rmfb(struct drm_device
*dev
,
2478 void *data
, struct drm_file
*file_priv
);
2479 extern int drm_mode_getfb(struct drm_device
*dev
,
2480 void *data
, struct drm_file
*file_priv
);
2481 extern int drm_mode_dirtyfb_ioctl(struct drm_device
*dev
,
2482 void *data
, struct drm_file
*file_priv
);
2484 extern int drm_mode_getproperty_ioctl(struct drm_device
*dev
,
2485 void *data
, struct drm_file
*file_priv
);
2486 extern int drm_mode_getblob_ioctl(struct drm_device
*dev
,
2487 void *data
, struct drm_file
*file_priv
);
2488 extern int drm_mode_createblob_ioctl(struct drm_device
*dev
,
2489 void *data
, struct drm_file
*file_priv
);
2490 extern int drm_mode_destroyblob_ioctl(struct drm_device
*dev
,
2491 void *data
, struct drm_file
*file_priv
);
2492 extern int drm_mode_connector_property_set_ioctl(struct drm_device
*dev
,
2493 void *data
, struct drm_file
*file_priv
);
2494 extern int drm_mode_getencoder(struct drm_device
*dev
,
2495 void *data
, struct drm_file
*file_priv
);
2496 extern int drm_mode_gamma_get_ioctl(struct drm_device
*dev
,
2497 void *data
, struct drm_file
*file_priv
);
2498 extern int drm_mode_gamma_set_ioctl(struct drm_device
*dev
,
2499 void *data
, struct drm_file
*file_priv
);
2500 extern u8
drm_match_cea_mode(const struct drm_display_mode
*to_match
);
2501 extern enum hdmi_picture_aspect
drm_get_cea_aspect_ratio(const u8 video_code
);
2502 extern bool drm_detect_hdmi_monitor(struct edid
*edid
);
2503 extern bool drm_detect_monitor_audio(struct edid
*edid
);
2504 extern bool drm_rgb_quant_range_selectable(struct edid
*edid
);
2505 extern int drm_mode_page_flip_ioctl(struct drm_device
*dev
,
2506 void *data
, struct drm_file
*file_priv
);
2507 extern int drm_add_modes_noedid(struct drm_connector
*connector
,
2508 int hdisplay
, int vdisplay
);
2509 extern void drm_set_preferred_mode(struct drm_connector
*connector
,
2510 int hpref
, int vpref
);
2512 extern int drm_edid_header_is_valid(const u8
*raw_edid
);
2513 extern bool drm_edid_block_valid(u8
*raw_edid
, int block
, bool print_bad_edid
,
2514 bool *edid_corrupt
);
2515 extern bool drm_edid_is_valid(struct edid
*edid
);
2516 extern void drm_edid_get_monitor_name(struct edid
*edid
, char *name
,
2519 extern struct drm_tile_group
*drm_mode_create_tile_group(struct drm_device
*dev
,
2521 extern struct drm_tile_group
*drm_mode_get_tile_group(struct drm_device
*dev
,
2523 extern void drm_mode_put_tile_group(struct drm_device
*dev
,
2524 struct drm_tile_group
*tg
);
2525 struct drm_display_mode
*drm_mode_find_dmt(struct drm_device
*dev
,
2526 int hsize
, int vsize
, int fresh
,
2529 extern int drm_mode_create_dumb_ioctl(struct drm_device
*dev
,
2530 void *data
, struct drm_file
*file_priv
);
2531 extern int drm_mode_mmap_dumb_ioctl(struct drm_device
*dev
,
2532 void *data
, struct drm_file
*file_priv
);
2533 extern int drm_mode_destroy_dumb_ioctl(struct drm_device
*dev
,
2534 void *data
, struct drm_file
*file_priv
);
2535 extern int drm_mode_obj_get_properties_ioctl(struct drm_device
*dev
, void *data
,
2536 struct drm_file
*file_priv
);
2537 extern int drm_mode_obj_set_property_ioctl(struct drm_device
*dev
, void *data
,
2538 struct drm_file
*file_priv
);
2539 extern int drm_mode_plane_set_obj_prop(struct drm_plane
*plane
,
2540 struct drm_property
*property
,
2542 extern int drm_mode_atomic_ioctl(struct drm_device
*dev
,
2543 void *data
, struct drm_file
*file_priv
);
2545 extern void drm_fb_get_bpp_depth(uint32_t format
, unsigned int *depth
,
2547 extern int drm_format_num_planes(uint32_t format
);
2548 extern int drm_format_plane_cpp(uint32_t format
, int plane
);
2549 extern int drm_format_horz_chroma_subsampling(uint32_t format
);
2550 extern int drm_format_vert_chroma_subsampling(uint32_t format
);
2551 extern int drm_format_plane_width(int width
, uint32_t format
, int plane
);
2552 extern int drm_format_plane_height(int height
, uint32_t format
, int plane
);
2553 extern const char *drm_get_format_name(uint32_t format
);
2554 extern struct drm_property
*drm_mode_create_rotation_property(struct drm_device
*dev
,
2555 unsigned int supported_rotations
);
2556 extern unsigned int drm_rotation_simplify(unsigned int rotation
,
2557 unsigned int supported_rotations
);
2561 static inline struct drm_plane
*drm_plane_find(struct drm_device
*dev
,
2564 struct drm_mode_object
*mo
;
2565 mo
= drm_mode_object_find(dev
, id
, DRM_MODE_OBJECT_PLANE
);
2566 return mo
? obj_to_plane(mo
) : NULL
;
2569 static inline struct drm_crtc
*drm_crtc_find(struct drm_device
*dev
,
2572 struct drm_mode_object
*mo
;
2573 mo
= drm_mode_object_find(dev
, id
, DRM_MODE_OBJECT_CRTC
);
2574 return mo
? obj_to_crtc(mo
) : NULL
;
2577 static inline struct drm_encoder
*drm_encoder_find(struct drm_device
*dev
,
2580 struct drm_mode_object
*mo
;
2581 mo
= drm_mode_object_find(dev
, id
, DRM_MODE_OBJECT_ENCODER
);
2582 return mo
? obj_to_encoder(mo
) : NULL
;
2586 * drm_connector_lookup - lookup connector object
2588 * @id: connector object id
2590 * This function looks up the connector object specified by id
2591 * add takes a reference to it.
2593 static inline struct drm_connector
*drm_connector_lookup(struct drm_device
*dev
,
2596 struct drm_mode_object
*mo
;
2597 mo
= drm_mode_object_find(dev
, id
, DRM_MODE_OBJECT_CONNECTOR
);
2598 return mo
? obj_to_connector(mo
) : NULL
;
2601 static inline struct drm_property
*drm_property_find(struct drm_device
*dev
,
2604 struct drm_mode_object
*mo
;
2605 mo
= drm_mode_object_find(dev
, id
, DRM_MODE_OBJECT_PROPERTY
);
2606 return mo
? obj_to_property(mo
) : NULL
;
2610 * Extract a degamma/gamma LUT value provided by user and round it to the
2611 * precision supported by the hardware.
2613 static inline uint32_t drm_color_lut_extract(uint32_t user_input
,
2614 uint32_t bit_precision
)
2616 uint32_t val
= user_input
;
2617 uint32_t max
= 0xffff >> (16 - bit_precision
);
2619 /* Round only if we're not using full precision. */
2620 if (bit_precision
< 16) {
2621 val
+= 1UL << (16 - bit_precision
- 1);
2622 val
>>= 16 - bit_precision
;
2625 return clamp_val(val
, 0, max
);
2629 * drm_framebuffer_reference - incr the fb refcnt
2632 * This functions increments the fb's refcount.
2634 static inline void drm_framebuffer_reference(struct drm_framebuffer
*fb
)
2636 drm_mode_object_reference(&fb
->base
);
2640 * drm_framebuffer_unreference - unref a framebuffer
2641 * @fb: framebuffer to unref
2643 * This functions decrements the fb's refcount and frees it if it drops to zero.
2645 static inline void drm_framebuffer_unreference(struct drm_framebuffer
*fb
)
2647 drm_mode_object_unreference(&fb
->base
);
2651 * drm_framebuffer_read_refcount - read the framebuffer reference count.
2654 * This functions returns the framebuffer's reference count.
2656 static inline uint32_t drm_framebuffer_read_refcount(struct drm_framebuffer
*fb
)
2658 return atomic_read(&fb
->base
.refcount
.refcount
);
2662 * drm_connector_reference - incr the connector refcnt
2663 * @connector: connector
2665 * This function increments the connector's refcount.
2667 static inline void drm_connector_reference(struct drm_connector
*connector
)
2669 drm_mode_object_reference(&connector
->base
);
2673 * drm_connector_unreference - unref a connector
2674 * @connector: connector to unref
2676 * This function decrements the connector's refcount and frees it if it drops to zero.
2678 static inline void drm_connector_unreference(struct drm_connector
*connector
)
2680 drm_mode_object_unreference(&connector
->base
);
2683 /* Plane list iterator for legacy (overlay only) planes. */
2684 #define drm_for_each_legacy_plane(plane, dev) \
2685 list_for_each_entry(plane, &(dev)->mode_config.plane_list, head) \
2686 for_each_if (plane->type == DRM_PLANE_TYPE_OVERLAY)
2688 #define drm_for_each_plane(plane, dev) \
2689 list_for_each_entry(plane, &(dev)->mode_config.plane_list, head)
2691 #define drm_for_each_crtc(crtc, dev) \
2692 list_for_each_entry(crtc, &(dev)->mode_config.crtc_list, head)
2695 assert_drm_connector_list_read_locked(struct drm_mode_config
*mode_config
)
2698 * The connector hotadd/remove code currently grabs both locks when
2699 * updating lists. Hence readers need only hold either of them to be
2700 * safe and the check amounts to
2702 * WARN_ON(not_holding(A) && not_holding(B)).
2704 WARN_ON(!mutex_is_locked(&mode_config
->mutex
) &&
2705 !drm_modeset_is_locked(&mode_config
->connection_mutex
));
2708 #define drm_for_each_connector(connector, dev) \
2709 for (assert_drm_connector_list_read_locked(&(dev)->mode_config), \
2710 connector = list_first_entry(&(dev)->mode_config.connector_list, \
2711 struct drm_connector, head); \
2712 &connector->head != (&(dev)->mode_config.connector_list); \
2713 connector = list_next_entry(connector, head))
2715 #define drm_for_each_encoder(encoder, dev) \
2716 list_for_each_entry(encoder, &(dev)->mode_config.encoder_list, head)
2718 #define drm_for_each_fb(fb, dev) \
2719 for (WARN_ON(!mutex_is_locked(&(dev)->mode_config.fb_lock)), \
2720 fb = list_first_entry(&(dev)->mode_config.fb_list, \
2721 struct drm_framebuffer, head); \
2722 &fb->head != (&(dev)->mode_config.fb_list); \
2723 fb = list_next_entry(fb, head))
2725 #endif /* __DRM_CRTC_H__ */