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drm/bridge: Fix atomic state ops documentation

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The drm_bridge_funcs atomic_state_duplicate and atomic_state_destroy
operations are erroneously documented as having a default implementation
if not implemented in bridge drivers. This isn't correct, fix the
documentation.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200226112514.12455-6-laurent.pinchart@ideasonboard.com
This commit is contained in:
Laurent Pinchart 2020-02-26 13:24:25 +02:00 committed by Tomi Valkeinen
parent be39f3db01
commit 282f713c65
1 changed files with 14 additions and 6 deletions
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20
include/drm/drm_bridge.h
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@ -349,9 +349,11 @@ struct drm_bridge_funcs {
* Duplicate the current bridge state object (which is guaranteed to be
* non-NULL).
*
* The atomic_duplicate_state() hook is optional. When not implemented
* the core allocates a drm_bridge_state object and calls
* __drm_atomic_helper_bridge_duplicate_state() to initialize it.
* The atomic_duplicate_state hook is mandatory if the bridge
* implements any of the atomic hooks, and should be left unassigned
* otherwise. For bridges that don't subclass &drm_bridge_state, the
* drm_atomic_helper_bridge_duplicate_state() helper function shall be
* used to implement this hook.
*
* RETURNS:
* A valid drm_bridge_state object or NULL if the allocation fails.
@ -364,8 +366,11 @@ struct drm_bridge_funcs {
* Destroy a bridge state object previously allocated by
* &drm_bridge_funcs.atomic_duplicate_state().
*
* The atomic_destroy_state hook is optional. When not implemented the
* core calls kfree() on the state.
* The atomic_destroy_state hook is mandatory if the bridge implements
* any of the atomic hooks, and should be left unassigned otherwise.
* For bridges that don't subclass &drm_bridge_state, the
* drm_atomic_helper_bridge_destroy_state() helper function shall be
* used to implement this hook.
*/
void (*atomic_destroy_state)(struct drm_bridge *bridge,
struct drm_bridge_state *state);
@ -474,7 +479,10 @@ struct drm_bridge_funcs {
* This function is called at attach time.
*
* The atomic_reset hook is mandatory if the bridge implements any of
* the atomic hooks, and should be left unassigned otherwise.
* the atomic hooks, and should be left unassigned otherwise. For
* bridges that don't subclass &drm_bridge_state, the
* drm_atomic_helper_bridge_reset() helper function shall be used to
* implement this hook.
*
* Note that the atomic_reset() semantics is not exactly matching the
* reset() semantics found on other components (connector, plane, ...).