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

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On Fri, Jul 20, 2018 at 10:15:08PM +0100, Alexandru Gheorghe wrote:
> Signed-off-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe@xxxxxxx>
> ---
>  drivers/gpu/drm/vc4/vc4_plane.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c
> index 9d7a36f148cf..688ad9bb0f08 100644
> --- a/drivers/gpu/drm/vc4/vc4_plane.c
> +++ b/drivers/gpu/drm/vc4/vc4_plane.c
> @@ -200,9 +200,7 @@ static void vc4_plane_reset(struct drm_plane *plane)
>  	if (!vc4_state)
>  		return;
>  
> -	plane->state = &vc4_state->base;
> -	plane->state->alpha = DRM_BLEND_ALPHA_OPAQUE;
> -	vc4_state->base.plane = plane;
> +	__drm_atomic_helper_plane_reset(plane, &vc4_state->base);

For vc4, rcar-du, atmel-hlcdc and sun4i, you're changing the reset
value of alpha from DRM_BLEND_ALPHA_OPAQUE to
plane->alpha_property->values[1].

This might or might not be a good idea, but you should definitely
explain why.

Maxime

-- 
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com

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