Re: [PATCH v2 07/20] drm/atomic-state-helper: Rename __drm_atomic_helper_plane_state_reset()

Thomas Zimmermann
2026-04-21T13:20:44Z

Hi

Am 20.03.26 um 17:27 schrieb Maxime Ripard:
> __drm_atomic_helper_plane_state_reset() is used to initialize a newly
> allocated drm_plane_state, and is being typically called by the
> drm_plane_funcs.reset implementation.
>
> Since we want to consolidate DRM objects state allocation around the
> atomic_create_state callback that will only allocate and initialize a
> new drm_plane_state instance, we will need to call
> __drm_atomic_helper_plane_state_reset() from both the reset and
> atomic_create hooks.
>
> To avoid any confusion, we can thus rename
> __drm_atomic_helper_plane_state_reset() to
> __drm_atomic_helper_plane_state_init().
>
> Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Signed-off-by: Maxime Ripard <mripard@kernel.org>

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>

I think the renaming makes sense even without the atomic_create_state
callbacks.

> * Initializes the newly allocated @plane_state with default
> * values. This is useful for drivers that subclass the CRTC state.
> */
> -void __drm_atomic_helper_plane_state_reset(struct drm_plane_state *plane_state,
> - struct drm_plane *plane)
> +void __drm_atomic_helper_plane_state_init(struct drm_plane_state *plane_state,
> + struct drm_plane *plane)

All such helpers are now just common init functions and you could drop
the double-underscores from the name, I think.

Best regards
Thomas

> {
> u64 val;
>
> plane_state->plane = plane;
> plane_state->rotation = DRM_MODE_ROTATE_0;
> @@ -295,11 +295,11 @@ void __drm_atomic_helper_plane_state_reset(struct drm_plane_state *plane_state,
> plane->hotspot_y_property,
> &val))
> plane_state->hotspot_y = val;
> }
> }
> -EXPORT_SYMBOL(__drm_atomic_helper_plane_state_reset);
> +EXPORT_SYMBOL(__drm_atomic_helper_plane_state_init);
>
> /**
> * __drm_atomic_helper_plane_reset - reset state on plane
> * @plane: drm plane
> * @plane_state: plane state to assign
> @@ -313,11 +313,11 @@ EXPORT_SYMBOL(__drm_atomic_helper_plane_state_reset);
> */
> void __drm_atomic_helper_plane_reset(struct drm_plane *plane,
> struct drm_plane_state *plane_state)
> {
> if (plane_state)
> - __drm_atomic_helper_plane_state_reset(plane_state, plane);
> + __drm_atomic_helper_plane_state_init(plane_state, plane);
>
> plane->state = plane_state;
> }
> EXPORT_SYMBOL(__drm_atomic_helper_plane_reset);
>
> diff --git a/drivers/gpu/drm/i915/display/intel_plane.c b/drivers/gpu/drm/i915/display/intel_plane.c
> index e06a0618b4c6cd3b4d13752f604006b525118193..705367fef836663e50fe9bbfb1fcc83abf1fb249 100644
> --- a/drivers/gpu/drm/i915/display/intel_plane.c
> +++ b/drivers/gpu/drm/i915/display/intel_plane.c
> @@ -65,11 +65,11 @@
> static void intel_plane_state_reset(struct intel_plane_state *plane_state,
> struct intel_plane *plane)
> {
> memset(plane_state, 0, sizeof(*plane_state));
>
> - __drm_atomic_helper_plane_state_reset(&plane_state->uapi, &plane->base);
> + __drm_atomic_helper_plane_state_init(&plane_state->uapi, &plane->base);
>
> plane_state->scaler_id = -1;
> }
>
> struct intel_plane *intel_plane_alloc(void)
> diff --git a/include/drm/drm_atomic_state_helper.h b/include/drm/drm_atomic_state_helper.h
> index 900672c6ea90ba9cb87e38a7c84225972aee43c5..44e8850aae7fd6390f4b58188a9c677b8389702f 100644
> --- a/include/drm/drm_atomic_state_helper.h
> +++ b/include/drm/drm_atomic_state_helper.h
> @@ -51,11 +51,11 @@ struct drm_crtc_state *
> drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc);
> void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state);
> void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
> struct drm_crtc_state *state);
>
> -void __drm_atomic_helper_plane_state_reset(struct drm_plane_state *state,
> +void __drm_atomic_helper_plane_state_init(struct drm_plane_state *state,
> struct drm_plane *plane);
> void __drm_atomic_helper_plane_reset(struct drm_plane *plane,
> struct drm_plane_state *state);
> void drm_atomic_helper_plane_reset(struct drm_plane *plane);
> void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
>

--
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com
GF: Jochen Jaser, Andrew McDonald, Werner Knoblich, (HRB 36809, AG Nürnberg)