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SubjectRe: [PATCH v7 14/18] drm/mediatek: Support "None" blending in Mixer
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Hi, Shawn:

On Thu, 2024-05-02 at 18:38 +0800, Shawn Sung wrote:
> From: Hsiao Chien Sung <shawn.sung@mediatek.com>
>
> Support "None" alpha blending mode on MediaTek's chips.

Reviewed-by: CK Hu <ck.hu@mediatek.com>

>
> Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com>
> ---
> drivers/gpu/drm/mediatek/mtk_ethdr.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_ethdr.c
> b/drivers/gpu/drm/mediatek/mtk_ethdr.c
> index 4f043be21ee36..91ebeee6c8b1d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_ethdr.c
> +++ b/drivers/gpu/drm/mediatek/mtk_ethdr.c
> @@ -180,7 +180,8 @@ void mtk_ethdr_layer_config(struct device *dev,
> unsigned int idx,
> else
> mix_con |= NON_PREMULTI_SOURCE;
>
> - if (state->base.fb && !state->base.fb->format->has_alpha) {
> + if (state->base.pixel_blend_mode == DRM_MODE_BLEND_PIXEL_NONE
> ||
> + (state->base.fb && !state->base.fb->format->has_alpha)) {
> /*
> * Mixer doesn't support CONST_BLD mode,
> * use a trick to make the output equivalent
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