[thirdparty/kernel/stable.git] / include / drm / drm_bridge.h

/*
 * Copyright (c) 2016 Intel Corporation
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting documentation, and
 * that the name of the copyright holders not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  The copyright holders make no representations
 * about the suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 */

#ifndef __DRM_BRIDGE_H__
#define __DRM_BRIDGE_H__

#include <linux/list.h>
#include <linux/ctype.h>
#include <drm/drm_mode_object.h>
#include <drm/drm_modes.h>

struct drm_bridge;
struct drm_bridge_timings;
struct drm_panel;

/**
 * struct drm_bridge_funcs - drm_bridge control functions
 */
struct drm_bridge_funcs {
	/**
	 * @attach:
	 *
	 * This callback is invoked whenever our bridge is being attached to a
	 * &drm_encoder.
	 *
	 * The attach callback is optional.
	 *
	 * RETURNS:
	 *
	 * Zero on success, error code on failure.
	 */
	int (*attach)(struct drm_bridge *bridge);

	/**
	 * @detach:
	 *
	 * This callback is invoked whenever our bridge is being detached from a
	 * &drm_encoder.
	 *
	 * The detach callback is optional.
	 */
	void (*detach)(struct drm_bridge *bridge);

	/**
	 * @mode_valid:
	 *
	 * This callback is used to check if a specific mode is valid in this
	 * bridge. This should be implemented if the bridge has some sort of
	 * restriction in the modes it can display. For example, a given bridge
	 * may be responsible to set a clock value. If the clock can not
	 * produce all the values for the available modes then this callback
	 * can be used to restrict the number of modes to only the ones that
	 * can be displayed.
	 *
	 * This hook is used by the probe helpers to filter the mode list in
	 * drm_helper_probe_single_connector_modes(), and it is used by the
	 * atomic helpers to validate modes supplied by userspace in
	 * drm_atomic_helper_check_modeset().
	 *
	 * This function is optional.
	 *
	 * NOTE:
	 *
	 * Since this function is both called from the check phase of an atomic
	 * commit, and the mode validation in the probe paths it is not allowed
	 * to look at anything else but the passed-in mode, and validate it
	 * against configuration-invariant hardward constraints. Any further
	 * limits which depend upon the configuration can only be checked in
	 * @mode_fixup.
	 *
	 * RETURNS:
	 *
	 * drm_mode_status Enum
	 */
	enum drm_mode_status (*mode_valid)(struct drm_bridge *bridge,
					   const struct drm_display_mode *mode);

	/**
	 * @mode_fixup:
	 *
	 * This callback is used to validate and adjust a mode. The parameter
	 * mode is the display mode that should be fed to the next element in
	 * the display chain, either the final &drm_connector or the next
	 * &drm_bridge. The parameter adjusted_mode is the input mode the bridge
	 * requires. It can be modified by this callback and does not need to
	 * match mode. See also &drm_crtc_state.adjusted_mode for more details.
	 *
	 * This is the only hook that allows a bridge to reject a modeset. If
	 * this function passes all other callbacks must succeed for this
	 * configuration.
	 *
	 * The mode_fixup callback is optional.
	 *
	 * NOTE:
	 *
	 * This function is called in the check phase of atomic modesets, which
	 * can be aborted for any reason (including on userspace's request to
	 * just check whether a configuration would be possible). Drivers MUST
	 * NOT touch any persistent state (hardware or software) or data
	 * structures except the passed in @state parameter.
	 *
	 * Also beware that userspace can request its own custom modes, neither
	 * core nor helpers filter modes to the list of probe modes reported by
	 * the GETCONNECTOR IOCTL and stored in &drm_connector.modes. To ensure
	 * that modes are filtered consistently put any bridge constraints and
	 * limits checks into @mode_valid.
	 *
	 * RETURNS:
	 *
	 * True if an acceptable configuration is possible, false if the modeset
	 * operation should be rejected.
	 */
	bool (*mode_fixup)(struct drm_bridge *bridge,
			   const struct drm_display_mode *mode,
			   struct drm_display_mode *adjusted_mode);
	/**
	 * @disable:
	 *
	 * This callback should disable the bridge. It is called right before
	 * the preceding element in the display pipe is disabled. If the
	 * preceding element is a bridge this means it's called before that
	 * bridge's @disable vfunc. If the preceding element is a &drm_encoder
	 * it's called right before the &drm_encoder_helper_funcs.disable,
	 * &drm_encoder_helper_funcs.prepare or &drm_encoder_helper_funcs.dpms
	 * hook.
	 *
	 * The bridge can assume that the display pipe (i.e. clocks and timing
	 * signals) feeding it is still running when this callback is called.
	 *
	 * The disable callback is optional.
	 */
	void (*disable)(struct drm_bridge *bridge);

	/**
	 * @post_disable:
	 *
	 * This callback should disable the bridge. It is called right after the
	 * preceding element in the display pipe is disabled. If the preceding
	 * element is a bridge this means it's called after that bridge's
	 * @post_disable function. If the preceding element is a &drm_encoder
	 * it's called right after the encoder's
	 * &drm_encoder_helper_funcs.disable, &drm_encoder_helper_funcs.prepare
	 * or &drm_encoder_helper_funcs.dpms hook.
	 *
	 * The bridge must assume that the display pipe (i.e. clocks and timing
	 * singals) feeding it is no longer running when this callback is
	 * called.
	 *
	 * The post_disable callback is optional.
	 */
	void (*post_disable)(struct drm_bridge *bridge);

	/**
	 * @mode_set:
	 *
	 * This callback should set the given mode on the bridge. It is called
	 * after the @mode_set callback for the preceding element in the display
	 * pipeline has been called already. If the bridge is the first element
	 * then this would be &drm_encoder_helper_funcs.mode_set. The display
	 * pipe (i.e.  clocks and timing signals) is off when this function is
	 * called.
	 *
	 * The adjusted_mode parameter is the mode output by the CRTC for the
	 * first bridge in the chain. It can be different from the mode
	 * parameter that contains the desired mode for the connector at the end
	 * of the bridges chain, for instance when the first bridge in the chain
	 * performs scaling. The adjusted mode is mostly useful for the first
	 * bridge in the chain and is likely irrelevant for the other bridges.
	 *
	 * For atomic drivers the adjusted_mode is the mode stored in
	 * &drm_crtc_state.adjusted_mode.
	 *
	 * NOTE:
	 *
	 * If a need arises to store and access modes adjusted for other
	 * locations than the connection between the CRTC and the first bridge,
	 * the DRM framework will have to be extended with DRM bridge states.
	 */
	void (*mode_set)(struct drm_bridge *bridge,
			 const struct drm_display_mode *mode,
			 const struct drm_display_mode *adjusted_mode);
	/**
	 * @pre_enable:
	 *
	 * This callback should enable the bridge. It is called right before
	 * the preceding element in the display pipe is enabled. If the
	 * preceding element is a bridge this means it's called before that
	 * bridge's @pre_enable function. If the preceding element is a
	 * &drm_encoder it's called right before the encoder's
	 * &drm_encoder_helper_funcs.enable, &drm_encoder_helper_funcs.commit or
	 * &drm_encoder_helper_funcs.dpms hook.
	 *
	 * The display pipe (i.e. clocks and timing signals) feeding this bridge
	 * will not yet be running when this callback is called. The bridge must
	 * not enable the display link feeding the next bridge in the chain (if
	 * there is one) when this callback is called.
	 *
	 * The pre_enable callback is optional.
	 */
	void (*pre_enable)(struct drm_bridge *bridge);

	/**
	 * @enable:
	 *
	 * This callback should enable the bridge. It is called right after
	 * the preceding element in the display pipe is enabled. If the
	 * preceding element is a bridge this means it's called after that
	 * bridge's @enable function. If the preceding element is a
	 * &drm_encoder it's called right after the encoder's
	 * &drm_encoder_helper_funcs.enable, &drm_encoder_helper_funcs.commit or
	 * &drm_encoder_helper_funcs.dpms hook.
	 *
	 * The bridge can assume that the display pipe (i.e. clocks and timing
	 * signals) feeding it is running when this callback is called. This
	 * callback must enable the display link feeding the next bridge in the
	 * chain if there is one.
	 *
	 * The enable callback is optional.
	 */
	void (*enable)(struct drm_bridge *bridge);
};

/**
 * struct drm_bridge_timings - timing information for the bridge
 */
struct drm_bridge_timings {
	/**
	 * @sampling_edge:
	 *
	 * Tells whether the bridge samples the digital input signal
	 * from the display engine on the positive or negative edge of the
	 * clock, this should reuse the DRM_BUS_FLAG_PIXDATA_[POS|NEG]EDGE
	 * bitwise flags from the DRM connector (bit 2 and 3 valid).
	 */
	u32 sampling_edge;
	/**
	 * @setup_time_ps:
	 *
	 * Defines the time in picoseconds the input data lines must be
	 * stable before the clock edge.
	 */
	u32 setup_time_ps;
	/**
	 * @hold_time_ps:
	 *
	 * Defines the time in picoseconds taken for the bridge to sample the
	 * input signal after the clock edge.
	 */
	u32 hold_time_ps;
};

/**
 * struct drm_bridge - central DRM bridge control structure
 */
struct drm_bridge {
	/** @dev: DRM device this bridge belongs to */
	struct drm_device *dev;
	/** @encoder: encoder to which this bridge is connected */
	struct drm_encoder *encoder;
	/** @next: the next bridge in the encoder chain */
	struct drm_bridge *next;
#ifdef CONFIG_OF
	/** @of_node: device node pointer to the bridge */
	struct device_node *of_node;
#endif
	/** @list: to keep track of all added bridges */
	struct list_head list;
	/**
	 * @timings:
	 *
	 * the timing specification for the bridge, if any (may be NULL)
	 */
	const struct drm_bridge_timings *timings;
	/** @funcs: control functions */
	const struct drm_bridge_funcs *funcs;
	/** @driver_private: pointer to the bridge driver's internal context */
	void *driver_private;
};

void drm_bridge_add(struct drm_bridge *bridge);
void drm_bridge_remove(struct drm_bridge *bridge);
struct drm_bridge *of_drm_find_bridge(struct device_node *np);
int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge,
		      struct drm_bridge *previous);

bool drm_bridge_mode_fixup(struct drm_bridge *bridge,
			   const struct drm_display_mode *mode,
			   struct drm_display_mode *adjusted_mode);
enum drm_mode_status drm_bridge_mode_valid(struct drm_bridge *bridge,
					   const struct drm_display_mode *mode);
void drm_bridge_disable(struct drm_bridge *bridge);
void drm_bridge_post_disable(struct drm_bridge *bridge);
void drm_bridge_mode_set(struct drm_bridge *bridge,
			 const struct drm_display_mode *mode,
			 const struct drm_display_mode *adjusted_mode);
void drm_bridge_pre_enable(struct drm_bridge *bridge);
void drm_bridge_enable(struct drm_bridge *bridge);

#ifdef CONFIG_DRM_PANEL_BRIDGE
struct drm_bridge *drm_panel_bridge_add(struct drm_panel *panel,
					u32 connector_type);
void drm_panel_bridge_remove(struct drm_bridge *bridge);
struct drm_bridge *devm_drm_panel_bridge_add(struct device *dev,
					     struct drm_panel *panel,
					     u32 connector_type);
#endif

#endif
Commit	Line	Data
199e4e96 SV	1	/*
	2	* Copyright (c) 2016 Intel Corporation
	3	*
	4	* Permission to use, copy, modify, distribute, and sell this software and its
	5	* documentation for any purpose is hereby granted without fee, provided that
	6	* the above copyright notice appear in all copies and that both that copyright
	7	* notice and this permission notice appear in supporting documentation, and
	8	* that the name of the copyright holders not be used in advertising or
	9	* publicity pertaining to distribution of the software without specific,
	10	* written prior permission. The copyright holders make no representations
	11	* about the suitability of this software for any purpose. It is provided "as
	12	* is" without express or implied warranty.
	13	*
	14	* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
	15	* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
	16	* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
	17	* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
	18	* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
	19	* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
	20	* OF THIS SOFTWARE.
	21	*/
	22
	23	#ifndef __DRM_BRIDGE_H__
	24	#define __DRM_BRIDGE_H__
	25
	26	#include <linux/list.h>
	27	#include <linux/ctype.h>
	28	#include <drm/drm_mode_object.h>
	29	#include <drm/drm_modes.h>
	30
	31	struct drm_bridge;
36a776df	32	struct drm_bridge_timings;
13dfc054	33	struct drm_panel;
199e4e96 SV	34
	35	/**
	36	* struct drm_bridge_funcs - drm_bridge control functions
	37	*/
	38	struct drm_bridge_funcs {
	39	/**
	40	* @attach:
	41	*
	42	* This callback is invoked whenever our bridge is being attached to a
	43	* &drm_encoder.
	44	*
	45	* The attach callback is optional.
	46	*
	47	* RETURNS:
	48	*
	49	* Zero on success, error code on failure.
	50	*/
	51	int (attach)(struct drm_bridge bridge);
	52
	53	/**
	54	* @detach:
	55	*
	56	* This callback is invoked whenever our bridge is being detached from a
	57	* &drm_encoder.
	58	*
	59	* The detach callback is optional.
	60	*/
	61	void (detach)(struct drm_bridge bridge);
	62
3eb220a5 JA	63	/**
	64	* @mode_valid:
	65	*
	66	* This callback is used to check if a specific mode is valid in this
	67	* bridge. This should be implemented if the bridge has some sort of
	68	* restriction in the modes it can display. For example, a given bridge
	69	* may be responsible to set a clock value. If the clock can not
	70	* produce all the values for the available modes then this callback
	71	* can be used to restrict the number of modes to only the ones that
	72	* can be displayed.
	73	*
	74	* This hook is used by the probe helpers to filter the mode list in
	75	* drm_helper_probe_single_connector_modes(), and it is used by the
	76	* atomic helpers to validate modes supplied by userspace in
	77	* drm_atomic_helper_check_modeset().
	78	*
	79	* This function is optional.
	80	*
	81	* NOTE:
	82	*
	83	* Since this function is both called from the check phase of an atomic
	84	* commit, and the mode validation in the probe paths it is not allowed
	85	* to look at anything else but the passed-in mode, and validate it
	86	* against configuration-invariant hardward constraints. Any further
	87	* limits which depend upon the configuration can only be checked in
	88	* @mode_fixup.
	89	*
	90	* RETURNS:
	91	*
	92	* drm_mode_status Enum
	93	*/
312924d3	94	enum drm_mode_status (mode_valid)(struct drm_bridge bridge,
3eb220a5 JA	95	const struct drm_display_mode *mode);
3eb220a5 JA	96
199e4e96 SV	97	/**
	98	* @mode_fixup:
	99	*
5d435b46	100	* This callback is used to validate and adjust a mode. The parameter
199e4e96 SV	101	* mode is the display mode that should be fed to the next element in
	102	* the display chain, either the final &drm_connector or the next
	103	* &drm_bridge. The parameter adjusted_mode is the input mode the bridge
	104	* requires. It can be modified by this callback and does not need to
9de5d4a6	105	* match mode. See also &drm_crtc_state.adjusted_mode for more details.
199e4e96 SV	106	*
	107	* This is the only hook that allows a bridge to reject a modeset. If
	108	* this function passes all other callbacks must succeed for this
	109	* configuration.
	110	*
	111	* The mode_fixup callback is optional.
	112	*
	113	* NOTE:
	114	*
	115	* This function is called in the check phase of atomic modesets, which
	116	* can be aborted for any reason (including on userspace's request to
	117	* just check whether a configuration would be possible). Drivers MUST
	118	* NOT touch any persistent state (hardware or software) or data
	119	* structures except the passed in @state parameter.
	120	*
3eb220a5 JA	121	* Also beware that userspace can request its own custom modes, neither
	122	* core nor helpers filter modes to the list of probe modes reported by
	123	* the GETCONNECTOR IOCTL and stored in &drm_connector.modes. To ensure
	124	* that modes are filtered consistently put any bridge constraints and
	125	* limits checks into @mode_valid.
	126	*
199e4e96 SV	127	* RETURNS:
	128	*
	129	* True if an acceptable configuration is possible, false if the modeset
	130	* operation should be rejected.
	131	*/
	132	bool (mode_fixup)(struct drm_bridge bridge,
	133	const struct drm_display_mode *mode,
	134	struct drm_display_mode *adjusted_mode);
	135	/**
	136	* @disable:
	137	*
	138	* This callback should disable the bridge. It is called right before
	139	* the preceding element in the display pipe is disabled. If the
	140	* preceding element is a bridge this means it's called before that
4541d31e SV	141	* bridge's @disable vfunc. If the preceding element is a &drm_encoder
	142	* it's called right before the &drm_encoder_helper_funcs.disable,
	143	* &drm_encoder_helper_funcs.prepare or &drm_encoder_helper_funcs.dpms
	144	* hook.
199e4e96 SV	145	*
	146	* The bridge can assume that the display pipe (i.e. clocks and timing
	147	* signals) feeding it is still running when this callback is called.
	148	*
	149	* The disable callback is optional.
	150	*/
	151	void (disable)(struct drm_bridge bridge);
	152
	153	/**
	154	* @post_disable:
	155	*
4541d31e SV	156	* This callback should disable the bridge. It is called right after the
	157	* preceding element in the display pipe is disabled. If the preceding
	158	* element is a bridge this means it's called after that bridge's
	159	* @post_disable function. If the preceding element is a &drm_encoder
	160	* it's called right after the encoder's
	161	* &drm_encoder_helper_funcs.disable, &drm_encoder_helper_funcs.prepare
	162	* or &drm_encoder_helper_funcs.dpms hook.
199e4e96 SV	163	*
	164	* The bridge must assume that the display pipe (i.e. clocks and timing
	165	* singals) feeding it is no longer running when this callback is
	166	* called.
	167	*
	168	* The post_disable callback is optional.
	169	*/
	170	void (post_disable)(struct drm_bridge bridge);
	171
	172	/**
	173	* @mode_set:
	174	*
	175	* This callback should set the given mode on the bridge. It is called
4541d31e SV	176	* after the @mode_set callback for the preceding element in the display
	177	* pipeline has been called already. If the bridge is the first element
	178	* then this would be &drm_encoder_helper_funcs.mode_set. The display
	179	* pipe (i.e. clocks and timing signals) is off when this function is
	180	* called.
584a0146 PC	181	*
	182	* The adjusted_mode parameter is the mode output by the CRTC for the
	183	* first bridge in the chain. It can be different from the mode
	184	* parameter that contains the desired mode for the connector at the end
	185	* of the bridges chain, for instance when the first bridge in the chain
	186	* performs scaling. The adjusted mode is mostly useful for the first
	187	* bridge in the chain and is likely irrelevant for the other bridges.
	188	*
	189	* For atomic drivers the adjusted_mode is the mode stored in
	190	* &drm_crtc_state.adjusted_mode.
	191	*
	192	* NOTE:
	193	*
	194	* If a need arises to store and access modes adjusted for other
	195	* locations than the connection between the CRTC and the first bridge,
	196	* the DRM framework will have to be extended with DRM bridge states.
199e4e96 SV	197	*/
199e4e96 SV	198	void (mode_set)(struct drm_bridge bridge,
63f8f3ba LP	199	const struct drm_display_mode *mode,
63f8f3ba LP	200	const struct drm_display_mode *adjusted_mode);
199e4e96 SV	201	/**
	202	* @pre_enable:
	203	*
	204	* This callback should enable the bridge. It is called right before
	205	* the preceding element in the display pipe is enabled. If the
	206	* preceding element is a bridge this means it's called before that
4541d31e SV	207	* bridge's @pre_enable function. If the preceding element is a
	208	* &drm_encoder it's called right before the encoder's
	209	* &drm_encoder_helper_funcs.enable, &drm_encoder_helper_funcs.commit or
	210	* &drm_encoder_helper_funcs.dpms hook.
199e4e96 SV	211	*
	212	* The display pipe (i.e. clocks and timing signals) feeding this bridge
	213	* will not yet be running when this callback is called. The bridge must
	214	* not enable the display link feeding the next bridge in the chain (if
	215	* there is one) when this callback is called.
	216	*
	217	* The pre_enable callback is optional.
	218	*/
	219	void (pre_enable)(struct drm_bridge bridge);
	220
	221	/**
	222	* @enable:
	223	*
	224	* This callback should enable the bridge. It is called right after
	225	* the preceding element in the display pipe is enabled. If the
	226	* preceding element is a bridge this means it's called after that
4541d31e SV	227	* bridge's @enable function. If the preceding element is a
	228	* &drm_encoder it's called right after the encoder's
	229	* &drm_encoder_helper_funcs.enable, &drm_encoder_helper_funcs.commit or
	230	* &drm_encoder_helper_funcs.dpms hook.
199e4e96 SV	231	*
	232	* The bridge can assume that the display pipe (i.e. clocks and timing
	233	* signals) feeding it is running when this callback is called. This
	234	* callback must enable the display link feeding the next bridge in the
	235	* chain if there is one.
	236	*
	237	* The enable callback is optional.
	238	*/
	239	void (enable)(struct drm_bridge bridge);
	240	};
	241
36a776df LW	242	/**
	243	* struct drm_bridge_timings - timing information for the bridge
	244	*/
	245	struct drm_bridge_timings {
	246	/**
	247	* @sampling_edge:
	248	*
	249	* Tells whether the bridge samples the digital input signal
	250	* from the display engine on the positive or negative edge of the
	251	* clock, this should reuse the DRM_BUS_FLAG_PIXDATA_[POS\|NEG]EDGE
	252	* bitwise flags from the DRM connector (bit 2 and 3 valid).
	253	*/
	254	u32 sampling_edge;
	255	/**
	256	* @setup_time_ps:
	257	*
	258	* Defines the time in picoseconds the input data lines must be
	259	* stable before the clock edge.
	260	*/
	261	u32 setup_time_ps;
	262	/**
	263	* @hold_time_ps:
	264	*
	265	* Defines the time in picoseconds taken for the bridge to sample the
	266	* input signal after the clock edge.
	267	*/
	268	u32 hold_time_ps;
	269	};
	270
199e4e96 SV	271	/**
199e4e96 SV	272	* struct drm_bridge - central DRM bridge control structure
199e4e96 SV	273	*/
199e4e96 SV	274	struct drm_bridge {
6aa13402	275	/** @dev: DRM device this bridge belongs to */
199e4e96	276	struct drm_device *dev;
6aa13402	277	/** @encoder: encoder to which this bridge is connected */
199e4e96	278	struct drm_encoder *encoder;
6aa13402	279	/** @next: the next bridge in the encoder chain */
199e4e96 SV	280	struct drm_bridge *next;
199e4e96 SV	281	#ifdef CONFIG_OF
6aa13402	282	/** @of_node: device node pointer to the bridge */
199e4e96 SV	283	struct device_node *of_node;
199e4e96 SV	284	#endif
6aa13402	285	/** @list: to keep track of all added bridges */
199e4e96	286	struct list_head list;
6aa13402 EA	287	/**
	288	* @timings:
	289	*
	290	* the timing specification for the bridge, if any (may be NULL)
	291	*/
36a776df	292	const struct drm_bridge_timings *timings;
6aa13402	293	/** @funcs: control functions */
199e4e96	294	const struct drm_bridge_funcs *funcs;
6aa13402	295	/** @driver_private: pointer to the bridge driver's internal context */
199e4e96 SV	296	void *driver_private;
	297	};
	298
99286884	299	void drm_bridge_add(struct drm_bridge *bridge);
199e4e96 SV	300	void drm_bridge_remove(struct drm_bridge *bridge);
199e4e96 SV	301	struct drm_bridge of_drm_find_bridge(struct device_node np);
3bb80f24 LP	302	int drm_bridge_attach(struct drm_encoder encoder, struct drm_bridge bridge,
3bb80f24 LP	303	struct drm_bridge *previous);
199e4e96 SV	304
199e4e96 SV	305	bool drm_bridge_mode_fixup(struct drm_bridge *bridge,
5d435b46 PC	306	const struct drm_display_mode *mode,
5d435b46 PC	307	struct drm_display_mode *adjusted_mode);
b1240f81 JA	308	enum drm_mode_status drm_bridge_mode_valid(struct drm_bridge *bridge,
b1240f81 JA	309	const struct drm_display_mode *mode);
199e4e96 SV	310	void drm_bridge_disable(struct drm_bridge *bridge);
	311	void drm_bridge_post_disable(struct drm_bridge *bridge);
	312	void drm_bridge_mode_set(struct drm_bridge *bridge,
63f8f3ba LP	313	const struct drm_display_mode *mode,
63f8f3ba LP	314	const struct drm_display_mode *adjusted_mode);
199e4e96 SV	315	void drm_bridge_pre_enable(struct drm_bridge *bridge);
	316	void drm_bridge_enable(struct drm_bridge *bridge);
	317
13dfc054 EA	318	#ifdef CONFIG_DRM_PANEL_BRIDGE
	319	struct drm_bridge drm_panel_bridge_add(struct drm_panel panel,
	320	u32 connector_type);
	321	void drm_panel_bridge_remove(struct drm_bridge *bridge);
67022227 EA	322	struct drm_bridge devm_drm_panel_bridge_add(struct device dev,
	323	struct drm_panel *panel,
	324	u32 connector_type);
13dfc054 EA	325	#endif
13dfc054 EA	326
199e4e96	327	#endif