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drm/todo: add entry about converting to of_drm_find_and_get_bridge()

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of_drm_find_bridge() is deprecated, but converting some users is very
complex and should be reasonably doable only after the DRM panel bridge
lifetime rework. Add a TODO to track this.

Suggested-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/dri-devel/20250319-stylish-lime-mongoose-0a18ad@houat/
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://patch.msgid.link/20251216-drm-bridge-alloc-getput-drm_of_find_bridge-v3-3-b5165fab8058@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
This commit is contained in:
Luca Ceresoli 2025-12-16 18:58:36 +01:00
parent 9da0e06abd
commit c637217efb
1 changed files with 16 additions and 0 deletions
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16
Documentation/gpu/todo.rst
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@ -506,6 +506,22 @@ Contact: Maxime Ripard <mripard@kernel.org>,
Level: Intermediate
Convert users of of_drm_find_bridge() to of_drm_find_and_get_bridge()
---------------------------------------------------------------------
Taking a struct drm_bridge pointer requires getting a reference and putting
it after disposing of the pointer. Most functions returning a struct
drm_bridge pointer already call drm_bridge_get() to increment the refcount
and their users have been updated to call drm_bridge_put() when
appropriate. of_drm_find_bridge() does not get a reference and it has been
deprecated in favor of of_drm_find_and_get_bridge() which does, but some
users still need to be converted.
Contact: Maxime Ripard <mripard@kernel.org>,
Luca Ceresoli <luca.ceresoli@bootlin.com>
Level: Intermediate
Core refactorings
=================