[PATCH v3 09/10] drm/vc4: Use __drm_atomic_helper_plane_reset instead of copying the logic

[Eric Anholt]

Alexandru Gheorghe <alexandru-cosmin.gheorghe at arm.com> writes:

> A new helper function(__drm_atomic_helper_plane_reset) has been added
> for linking a plane with its state and resetting the core
> properties(alpha, rotation, etc.) to their default values.
> Use that instead of duplicating the logic.
>
> __drm_atomic_helper_plane_reset initializes the alpha property to its
> max value, which is defined by the drm core as DRM_BLEND_ALPHA_OPAQUE,
> so nothing changes regarding the alpha value.
>
> Signed-off-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe at arm.com>

Acked-by: Eric Anholt <eric at anholt.net>
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