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Some code needing to know whether a bridge is the last in a chain currently call drm_bridge_get_next_bridge(). However drm_bridge_get_next_bridge() will soon increment the refcount of the returned bridge, which would make such code more annoying to write. In preparation for drm_bridge_get_next_bridge() to increment the refcount, as well as to simplify such code, introduce a simple bool function to tell whether a bridge is the last in the chain. Reviewed-by: Maxime Ripard <mripard@kernel.org> Link: https://lore.kernel.org/r/20250801-drm-bridge-alloc-getput-drm_bridge_get_next_bridge-v2-5-888912b0be13@bootlin.com Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>