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drm/bridge: Add the drm_for_each_bridge_in_chain() helper 

To iterate over all bridges attached to a specific encoder.

Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191203141515.3597631-6-boris.brezillon@collabora.com
This commit is contained in:
Boris Brezillon 2019-12-03 15:15:09 +01:00
parent 05193dc381
commit 4ec5c9050a
1 changed files with 11 additions and 0 deletions
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11
include/drm/drm_bridge.h
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@ -441,6 +441,17 @@ drm_bridge_chain_get_first_bridge(struct drm_encoder *encoder)
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
* @bridge: a bridge pointer updated to point to the current bridge at each
* iteration
*
* Iterate over all bridges present in the bridge chain attached to @encoder.
*/
#define drm_for_each_bridge_in_chain(encoder, bridge) \
list_for_each_entry(bridge, &(encoder)->bridge_chain, chain_node)
bool drm_bridge_chain_mode_fixup(struct drm_bridge *bridge,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode);