Some users of DRM bridges may need to execute specific code just before deallocation.
As of now the only known user would be KUnit tests. Suggested-by: Maxime Ripard <mrip...@kernel.org> Signed-off-by: Luca Ceresoli <luca.ceres...@bootlin.com> --- This patch is new in v8. The .destroy callback had appeared in v5 as well [5], but as part of a larger patch and for different reason that do not apply anymore. [5] https://lore.kernel.org/all/20241231-hotplug-drm-bridge-v5-3-173065a1e...@bootlin.com/#t --- drivers/gpu/drm/drm_bridge.c | 2 ++ include/drm/drm_bridge.h | 10 ++++++++++ 2 files changed, 12 insertions(+) diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index b4c89ec01998b849018ce031c7cd84614e65e710..6185cb29fe3162264f0912c09c205fb467975dee 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -203,6 +203,8 @@ static void __drm_bridge_free(struct kref *kref) { struct drm_bridge *bridge = container_of(kref, struct drm_bridge, refcount); + if (bridge->funcs->destroy) + bridge->funcs->destroy(bridge); kfree(bridge->container); } diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index 4e418a29a9ff9d014d6ac0910a5d9bcf7118195e..3ccd493faa580845c2ed1166f398eca27b464261 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -86,6 +86,16 @@ struct drm_bridge_funcs { */ void (*detach)(struct drm_bridge *bridge); + /** + * @destroy: + * + * This callback is invoked when the bridge is about to be + * deallocated. + * + * The @destroy callback is optional. + */ + void (*destroy)(struct drm_bridge *bridge); + /** * @mode_valid: * -- 2.49.0
