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drm/bridge: add drm_bridge_chain_get_last_bridge()

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Add an equivalent of drm_bridge_chain_get_first_bridge() to get the last
bridge.

Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20250801-drm-bridge-alloc-getput-drm_bridge_get_next_bridge-v2-2-888912b0be13@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
This commit is contained in:
Luca Ceresoli 2025-08-01 19:05:24 +02:00
parent cb86408b1f
commit d77ad5178e
1 changed files with 18 additions and 0 deletions
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18
include/drm/drm_bridge.h
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@ -1410,6 +1410,24 @@ drm_bridge_chain_get_first_bridge(struct drm_encoder *encoder)
struct drm_bridge, chain_node));
}
/**
* drm_bridge_chain_get_last_bridge() - Get the last bridge in the chain
* @encoder: encoder object
*
* The refcount of the returned bridge is incremented. Use drm_bridge_put()
* when done with it.
*
* RETURNS:
* the last bridge in the chain, or NULL if @encoder has no bridge attached
* to it.
*/
static inline struct drm_bridge *
drm_bridge_chain_get_last_bridge(struct drm_encoder *encoder)
{
return drm_bridge_get(list_last_entry_or_null(&encoder->bridge_chain,
struct drm_bridge, chain_node));
}
/**
* drm_for_each_bridge_in_chain() - Iterate over all bridges present in a chain
* @encoder: the encoder to iterate bridges on