45 	 * This callback is invoked whenever our bridge is being attached to a
54 	int (*attach)(struct drm_bridge *bridge);
59 	 * This callback is invoked whenever our bridge is being detached from a
64 	void (*detach)(struct drm_bridge *bridge);
70 	 * bridge. This should be implemented if the bridge has some sort of
71 	 * restriction in the modes it can display. For example, a given bridge
97 	enum drm_mode_status (*mode_valid)(struct drm_bridge *bridge,
106 	 * &drm_bridge. The parameter adjusted_mode is the input mode the bridge
110 	 * This is the only hook that allows a bridge to reject a modeset. If
127 	 * that modes are filtered consistently put any bridge constraints and
135 	bool (*mode_fixup)(struct drm_bridge *bridge,
141 	 * This callback should disable the bridge. It is called right before
143 	 * preceding element is a bridge this means it's called before that
144 	 * bridge's @disable vfunc. If the preceding element is a &drm_encoder
149 	 * The bridge can assume that the display pipe (i.e. clocks and timing
154 	void (*disable)(struct drm_bridge *bridge);
159 	 * This callback should disable the bridge. It is called right after the
161 	 * element is a bridge this means it's called after that bridge's
167 	 * The bridge must assume that the display pipe (i.e. clocks and timing
173 	void (*post_disable)(struct drm_bridge *bridge);
178 	 * This callback should set the given mode on the bridge. It is called
180 	 * pipeline has been called already. If the bridge is the first element
186 	 * first bridge in the chain. It can be different from the mode
188 	 * of the bridges chain, for instance when the first bridge in the chain
190 	 * bridge in the chain and is likely irrelevant for the other bridges.
198 	 * locations than the connection between the CRTC and the first bridge,
199 	 * the DRM framework will have to be extended with DRM bridge states.
201 	void (*mode_set)(struct drm_bridge *bridge,
207 	 * This callback should enable the bridge. It is called right before
209 	 * preceding element is a bridge this means it's called before that
210 	 * bridge's @pre_enable function. If the preceding element is a
215 	 * The display pipe (i.e. clocks and timing signals) feeding this bridge
216 	 * will not yet be running when this callback is called. The bridge must
217 	 * not enable the display link feeding the next bridge in the chain (if
222 	void (*pre_enable)(struct drm_bridge *bridge);
227 	 * This callback should enable the bridge. It is called right after
229 	 * preceding element is a bridge this means it's called after that
230 	 * bridge's @enable function. If the preceding element is a
235 	 * The bridge can assume that the display pipe (i.e. clocks and timing
237 	 * callback must enable the display link feeding the next bridge in the
242 	void (*enable)(struct drm_bridge *bridge);
247 	 * This callback should enable the bridge. It is called right before
249 	 * preceding element is a bridge this means it's called before that
250 	 * bridge's @atomic_pre_enable or @pre_enable function. If the preceding
254 	 * The display pipe (i.e. clocks and timing signals) feeding this bridge
255 	 * will not yet be running when this callback is called. The bridge must
256 	 * not enable the display link feeding the next bridge in the chain (if
267 	void (*atomic_pre_enable)(struct drm_bridge *bridge,
273 	 * This callback should enable the bridge. It is called right after
275 	 * preceding element is a bridge this means it's called after that
276 	 * bridge's @atomic_enable or @enable function. If the preceding element
280 	 * The bridge can assume that the display pipe (i.e. clocks and timing
282 	 * callback must enable the display link feeding the next bridge in the
292 	void (*atomic_enable)(struct drm_bridge *bridge,
297 	 * This callback should disable the bridge. It is called right before
299 	 * preceding element is a bridge this means it's called before that
300 	 * bridge's @atomic_disable or @disable vfunc. If the preceding element
304 	 * The bridge can assume that the display pipe (i.e. clocks and timing
315 	void (*atomic_disable)(struct drm_bridge *bridge,
321 	 * This callback should disable the bridge. It is called right after the
323 	 * element is a bridge this means it's called after that bridge's
328 	 * The bridge must assume that the display pipe (i.e. clocks and timing
341 	void (*atomic_post_disable)(struct drm_bridge *bridge,
346  * struct drm_bridge_timings - timing information for the bridge
353 	 * this bridge requires (like pixel signal polarity). See also
367 	 * Defines the time in picoseconds taken for the bridge to sample the
382  * struct drm_bridge - central DRM bridge control structure
385 	/** @dev: DRM device this bridge belongs to */
387 	/** @encoder: encoder to which this bridge is connected */
389 	/** @chain_node: used to form a bridge chain */
392 	/** @of_node: device node pointer to the bridge */
400 	 * the timing specification for the bridge, if any (may be NULL)
405 	/** @driver_private: pointer to the bridge driver's internal context */
409 void drm_bridge_add(struct drm_bridge *bridge);
410 void drm_bridge_remove(struct drm_bridge *bridge);
412 int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge,
416  * drm_bridge_get_next_bridge() - Get the next bridge in the chain
417  * @bridge: bridge object
420  * the next bridge in the chain after @bridge, or NULL if @bridge is the last.
423 drm_bridge_get_next_bridge(struct drm_bridge *bridge)
425 	if (list_is_last(&bridge->chain_node, &bridge->encoder->bridge_chain))
428 	return list_next_entry(bridge, chain_node);
432  * drm_bridge_get_prev_bridge() - Get the previous bridge in the chain
433  * @bridge: bridge object
436  * the previous bridge in the chain, or NULL if @bridge is the first.
439 drm_bridge_get_prev_bridge(struct drm_bridge *bridge)
441 	if (list_is_first(&bridge->chain_node, &bridge->encoder->bridge_chain))
444 	return list_prev_entry(bridge, chain_node);
448  * drm_bridge_chain_get_first_bridge() - Get the first bridge in the chain
452  * the first bridge in the chain, or NULL if @encoder has no bridge attached
465  * @bridge: a bridge pointer updated to point to the current bridge at each
468  * Iterate over all bridges present in the bridge chain attached to @encoder.
470 #define drm_for_each_bridge_in_chain(encoder, bridge)			\
471 	list_for_each_entry(bridge, &(encoder)->bridge_chain, chain_node)
473 bool drm_bridge_chain_mode_fixup(struct drm_bridge *bridge,
477 drm_bridge_chain_mode_valid(struct drm_bridge *bridge,
479 void drm_bridge_chain_disable(struct drm_bridge *bridge);
480 void drm_bridge_chain_post_disable(struct drm_bridge *bridge);
481 void drm_bridge_chain_mode_set(struct drm_bridge *bridge,
484 void drm_bridge_chain_pre_enable(struct drm_bridge *bridge);
485 void drm_bridge_chain_enable(struct drm_bridge *bridge);
487 void drm_atomic_bridge_chain_disable(struct drm_bridge *bridge,
489 void drm_atomic_bridge_chain_post_disable(struct drm_bridge *bridge,
491 void drm_atomic_bridge_chain_pre_enable(struct drm_bridge *bridge,
493 void drm_atomic_bridge_chain_enable(struct drm_bridge *bridge,
500 void drm_panel_bridge_remove(struct drm_bridge *bridge);
506 struct drm_connector *drm_panel_bridge_connector(struct drm_bridge *bridge);

Indexes created Mon Nov 10 17:20:41 GMT 2025