49 	 * @DRM_BRIDGE_ATTACH_NO_CONNECTOR: When this flag is set the bridge
62 	 * This callback is invoked whenever our bridge is being attached to a
72 	int (*attach)(struct drm_bridge *bridge,
78 	 * This callback is invoked whenever our bridge is being detached from a
83 	void (*detach)(struct drm_bridge *bridge);
89 	 * bridge. This should be implemented if the bridge has some sort of
90 	 * restriction in the modes it can display. For example, a given bridge
116 	enum drm_mode_status (*mode_valid)(struct drm_bridge *bridge,
126 	 * &drm_bridge. The parameter adjusted_mode is the input mode the bridge
130 	 * This is the only hook that allows a bridge to reject a modeset. If
149 	 * that modes are filtered consistently put any bridge constraints and
157 	bool (*mode_fixup)(struct drm_bridge *bridge,
163 	 * This callback should disable the bridge. It is called right before
165 	 * preceding element is a bridge this means it's called before that
166 	 * bridge's @disable vfunc. If the preceding element is a &drm_encoder
171 	 * The bridge can assume that the display pipe (i.e. clocks and timing
181 	void (*disable)(struct drm_bridge *bridge);
186 	 * This callback should disable the bridge. It is called right after the
188 	 * element is a bridge this means it's called after that bridge's
194 	 * The bridge must assume that the display pipe (i.e. clocks and timing
205 	void (*post_disable)(struct drm_bridge *bridge);
210 	 * This callback should set the given mode on the bridge. It is called
212 	 * pipeline has been called already. If the bridge is the first element
218 	 * first bridge in the chain. It can be different from the mode
220 	 * of the bridges chain, for instance when the first bridge in the chain
222 	 * bridge in the chain and is likely irrelevant for the other bridges.
233 	void (*mode_set)(struct drm_bridge *bridge,
239 	 * This callback should enable the bridge. It is called right before
241 	 * preceding element is a bridge this means it's called before that
242 	 * bridge's @pre_enable function. If the preceding element is a
247 	 * The display pipe (i.e. clocks and timing signals) feeding this bridge
248 	 * will not yet be running when this callback is called. The bridge must
249 	 * not enable the display link feeding the next bridge in the chain (if
259 	void (*pre_enable)(struct drm_bridge *bridge);
264 	 * This callback should enable the bridge. It is called right after
266 	 * preceding element is a bridge this means it's called after that
267 	 * bridge's @enable function. If the preceding element is a
272 	 * The bridge can assume that the display pipe (i.e. clocks and timing
274 	 * callback must enable the display link feeding the next bridge in the
284 	void (*enable)(struct drm_bridge *bridge);
289 	 * This callback should enable the bridge. It is called right before
291 	 * preceding element is a bridge this means it's called before that
292 	 * bridge's @atomic_pre_enable or @pre_enable function. If the preceding
296 	 * The display pipe (i.e. clocks and timing signals) feeding this bridge
297 	 * will not yet be running when this callback is called. The bridge must
298 	 * not enable the display link feeding the next bridge in the chain (if
303 	void (*atomic_pre_enable)(struct drm_bridge *bridge,
309 	 * This callback should enable the bridge. It is called right after
311 	 * preceding element is a bridge this means it's called after that
312 	 * bridge's @atomic_enable or @enable function. If the preceding element
316 	 * The bridge can assume that the display pipe (i.e. clocks and timing
318 	 * callback must enable the display link feeding the next bridge in the
323 	void (*atomic_enable)(struct drm_bridge *bridge,
328 	 * This callback should disable the bridge. It is called right before
330 	 * preceding element is a bridge this means it's called before that
331 	 * bridge's @atomic_disable or @disable vfunc. If the preceding element
335 	 * The bridge can assume that the display pipe (i.e. clocks and timing
340 	void (*atomic_disable)(struct drm_bridge *bridge,
346 	 * This callback should disable the bridge. It is called right after the
348 	 * element is a bridge this means it's called after that bridge's
353 	 * The bridge must assume that the display pipe (i.e. clocks and timing
359 	void (*atomic_post_disable)(struct drm_bridge *bridge,
365 	 * Duplicate the current bridge state object (which is guaranteed to be
368 	 * The atomic_duplicate_state hook is mandatory if the bridge
377 	struct drm_bridge_state *(*atomic_duplicate_state)(struct drm_bridge *bridge);
382 	 * Destroy a bridge state object previously allocated by
385 	 * The atomic_destroy_state hook is mandatory if the bridge implements
391 	void (*atomic_destroy_state)(struct drm_bridge *bridge,
397 	 * Return the supported bus formats on the output end of a bridge.
405 	 * This method is only called on the last element of the bridge chain
413 	u32 *(*atomic_get_output_bus_fmts)(struct drm_bridge *bridge,
422 	 * Return the supported bus formats on the input end of a bridge for
433 	 * This method is called on all elements of the bridge chain as part of
437 	 * bus format negotiation on this element of the bridge without
441 	 * Bridge drivers that need to support being linked to bridges that are
447 	 * Note: Even if input format selection on the first bridge has no
453 	u32 *(*atomic_get_input_bus_fmts)(struct drm_bridge *bridge,
463 	 * This method is responsible for checking bridge state correctness.
468 	 * order (from the last to the first bridge).
477 	 * field is set to the next bridge
479 	 * &drm_connector.display_info.bus_flags if the bridge is the last
485 	int (*atomic_check)(struct drm_bridge *bridge,
493 	 * Reset the bridge to a predefined state (or retrieve its current
497 	 * The atomic_reset hook is mandatory if the bridge implements any of
506 	 * 1. The reset operation happens when the bridge is attached, not when
515 	struct drm_bridge_state *(*atomic_reset)(struct drm_bridge *bridge);
520 	 * Check if anything is attached to the bridge output.
522 	 * This callback is optional, if not implemented the bridge will be
529 	 * drm_connector_status indicating the bridge output status.
531 	enum drm_connector_status (*detect)(struct drm_bridge *bridge);
548 	 * filling modes, and shall not be stored internally by bridge drivers
555 	int (*get_modes)(struct drm_bridge *bridge,
564 	 * information for a display connected to the bridge output. Bridges
576 	 * retrieval, and shall not be stored internally by bridge drivers for
586 	const struct drm_edid *(*edid_read)(struct drm_bridge *bridge,
595 	 * information for a display connected to the bridge output. Bridges
607 	 * retrieval and parsing, and shall not be stored internally by bridge
616 	struct edid *(*get_edid)(struct drm_bridge *bridge,
622 	 * Notify the bridge of hot plug detection.
629 	void (*hpd_notify)(struct drm_bridge *bridge,
635 	 * Enable hot plug detection. From now on the bridge shall call
645 	void (*hpd_enable)(struct drm_bridge *bridge);
650 	 * Disable hot plug detection. Once this function returns the bridge
659 	void (*hpd_disable)(struct drm_bridge *bridge);
664 	 * Allows bridges to create bridge-specific debugfs files.
666 	void (*debugfs_init)(struct drm_bridge *bridge, struct dentry *root);
670  * struct drm_bridge_timings - timing information for the bridge
677 	 * this bridge requires (like pixel signal polarity). See also
691 	 * Defines the time in picoseconds taken for the bridge to sample the
706  * enum drm_bridge_ops - Bitmask of operations supported by the bridge
710 	 * @DRM_BRIDGE_OP_DETECT: The bridge can detect displays connected to
716 	 * @DRM_BRIDGE_OP_EDID: The bridge can retrieve the EDID of the display
722 	 * @DRM_BRIDGE_OP_HPD: The bridge can detect hot-plug and hot-unplug
730 	 * @DRM_BRIDGE_OP_MODES: The bridge can retrieve the modes supported
739  * struct drm_bridge - central DRM bridge control structure
744 	/** @dev: DRM device this bridge belongs to */
746 	/** @encoder: encoder to which this bridge is connected */
748 	/** @chain_node: used to form a bridge chain */
751 	/** @of_node: device node pointer to the bridge */
759 	 * the timing specification for the bridge, if any (may be NULL)
764 	/** @driver_private: pointer to the bridge driver's internal context */
766 	/** @ops: bitmask of operations supported by the bridge */
769 	 * @type: Type of the connection at the bridge output
775 	 * @interlace_allowed: Indicate that the bridge can handle interlaced
780 	 * @pre_enable_prev_first: The bridge requires that the prev
781 	 * bridge @pre_enable function is called before its @pre_enable,
814 void drm_bridge_add(struct drm_bridge *bridge);
815 int devm_drm_bridge_add(struct device *dev, struct drm_bridge *bridge);
816 void drm_bridge_remove(struct drm_bridge *bridge);
817 int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge,
831  * drm_bridge_get_next_bridge() - Get the next bridge in the chain
832  * @bridge: bridge object
835  * the next bridge in the chain after @bridge, or NULL if @bridge is the last.
838 drm_bridge_get_next_bridge(struct drm_bridge *bridge)  in drm_bridge_get_next_bridge()  argument
840 	if (list_is_last(&bridge->chain_node, &bridge->encoder->bridge_chain))  in drm_bridge_get_next_bridge()
843 	return list_next_entry(bridge, chain_node);  in drm_bridge_get_next_bridge()
847  * drm_bridge_get_prev_bridge() - Get the previous bridge in the chain
848  * @bridge: bridge object
851  * the previous bridge in the chain, or NULL if @bridge is the first.
854 drm_bridge_get_prev_bridge(struct drm_bridge *bridge)  in drm_bridge_get_prev_bridge()  argument
856 	if (list_is_first(&bridge->chain_node, &bridge->encoder->bridge_chain))  in drm_bridge_get_prev_bridge()
859 	return list_prev_entry(bridge, chain_node);  in drm_bridge_get_prev_bridge()
863  * drm_bridge_chain_get_first_bridge() - Get the first bridge in the chain
867  * the first bridge in the chain, or NULL if @encoder has no bridge attached
880  * @bridge: a bridge pointer updated to point to the current bridge at each
883  * Iterate over all bridges present in the bridge chain attached to @encoder.
885 #define drm_for_each_bridge_in_chain(encoder, bridge)			\  argument
886 	list_for_each_entry(bridge, &(encoder)->bridge_chain, chain_node)
888 bool drm_bridge_chain_mode_fixup(struct drm_bridge *bridge,
892 drm_bridge_chain_mode_valid(struct drm_bridge *bridge,
895 void drm_bridge_chain_mode_set(struct drm_bridge *bridge,
899 int drm_atomic_bridge_chain_check(struct drm_bridge *bridge,
902 void drm_atomic_bridge_chain_disable(struct drm_bridge *bridge,
904 void drm_atomic_bridge_chain_post_disable(struct drm_bridge *bridge,
906 void drm_atomic_bridge_chain_pre_enable(struct drm_bridge *bridge,
908 void drm_atomic_bridge_chain_enable(struct drm_bridge *bridge,
912 drm_atomic_helper_bridge_propagate_bus_fmt(struct drm_bridge *bridge,
919 enum drm_connector_status drm_bridge_detect(struct drm_bridge *bridge);
920 int drm_bridge_get_modes(struct drm_bridge *bridge,
922 const struct drm_edid *drm_bridge_edid_read(struct drm_bridge *bridge,
924 struct edid *drm_bridge_get_edid(struct drm_bridge *bridge,
926 void drm_bridge_hpd_enable(struct drm_bridge *bridge,
930 void drm_bridge_hpd_disable(struct drm_bridge *bridge);
931 void drm_bridge_hpd_notify(struct drm_bridge *bridge,
935 bool drm_bridge_is_panel(const struct drm_bridge *bridge);
939 void drm_panel_bridge_remove(struct drm_bridge *bridge);
941 				     struct drm_bridge *bridge);
949 struct drm_connector *drm_panel_bridge_connector(struct drm_bridge *bridge);
951 static inline bool drm_bridge_is_panel(const struct drm_bridge *bridge)  in drm_bridge_is_panel()  argument
957 						   struct drm_bridge *bridge)  in drm_panel_bridge_set_orientation()  argument