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 <[email protected]> Acked-by: Maxime Ripard <[email protected]> Signed-off-by: Luca Ceresoli <[email protected]> --- Changes in v9: - move .destroy before .detach in struct drm_bridge_funcs declaration for alphabetic ordering - Add Maxime's Acked-by - Fix typo in commit message This patch was added in v8. The .destroy callback had appeared in v5 as well [5], but as part of a larger patch and for different reasons that do not apply anymore. [5] https://lore.kernel.org/all/[email protected]/#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 d0e81639927a73422671b7b43f3e8a946f1d4300..bf34cc5ab0316889186ddf5ebb3a984b09eeb86c 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 0af5db244db8580ea0c9af1d9a373b7bf62ee699..dbd6503f33ba917fbcfb73b985d9c34910f04e0f 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -77,6 +77,16 @@ struct drm_bridge_funcs { int (*attach)(struct drm_bridge *bridge, struct drm_encoder *encoder, enum drm_bridge_attach_flags flags); + /** + * @destroy: + * + * This callback is invoked when the bridge is about to be + * deallocated. + * + * The @destroy callback is optional. + */ + void (*destroy)(struct drm_bridge *bridge); + /** * @detach: * -- 2.49.0
