diff options
| author | Luca Ceresoli <luca.ceresoli@bootlin.com> | 2025-11-12 17:34:34 +0100 |
|---|---|---|
| committer | Luca Ceresoli <luca.ceresoli@bootlin.com> | 2025-12-11 11:28:43 +0100 |
| commit | d36137085a4aa2d2f039359a0d67d9e07667f2de (patch) | |
| tree | 6ff06ac80bb01e501bb2e873748cbe1def12ebc8 /include | |
| parent | a1542b8ca6edabbb42ec4141e55d0d0710c9b6df (diff) | |
drm/bridge: add drm_bridge_unplug() and drm_bridge_enter/exit()
To allow DRM bridges to be removable, add synchronization functions
allowing to tell when a bridge hardware has been physically unplugged and
to mark a critical section that should not be entered after that.
This is inspired by the drm_dev_unplugged/enter/exit() functions for struct
drm_device.
Suggested-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/all/20250106-vigorous-talented-viper-fa49d9@houat/
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://patch.msgid.link/20251112-drm-bridge-atomic-vs-remove-v3-1-85db717ce094@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/drm/drm_bridge.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index 0ff7ab4aa868..d2683846cc61 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -1143,6 +1143,14 @@ struct drm_bridge { */ struct kref refcount; + /** + * @unplugged: + * + * Flag to tell if the bridge has been unplugged. + * See drm_bridge_enter() and drm_bridge_unplug(). + */ + bool unplugged; + /** @driver_private: pointer to the bridge driver's internal context */ void *driver_private; /** @ops: bitmask of operations supported by the bridge */ @@ -1278,6 +1286,10 @@ drm_priv_to_bridge(struct drm_private_obj *priv) return container_of(priv, struct drm_bridge, base); } +bool drm_bridge_enter(struct drm_bridge *bridge, int *idx); +void drm_bridge_exit(int idx); +void drm_bridge_unplug(struct drm_bridge *bridge); + struct drm_bridge *drm_bridge_get(struct drm_bridge *bridge); void drm_bridge_put(struct drm_bridge *bridge); |