[PATCH v3 4/5] drm/mediatek: Support "Pre-multiplied" blending in Mixer

[AngeloGioacchino Del Regno]

Il 10/07/24 10:52, Hsiao Chien Sung via B4 Relay ha scritto:
> From: Hsiao Chien Sung <shawn.sung at mediatek.com>
> 
> Support "Pre-multiplied" alpha blending mode in Mixer.
> Before this patch, only the coverage mode is supported.
> 
> To replace the default setting that is set in mtk_ethdr_config(),
> we change mtk_ddp_write_mask() to mtk_ddp_write(), and this change will
> also reset the NON_PREMULTI_SOURCE bit that was assigned in
> mtk_ethdr_config(). Therefore, we must still set NON_PREMULTI_SOURCE bit
> if the blend mode is not DRM_MODE_BLEND_PREMULTI.
> 
> Signed-off-by: Hsiao Chien Sung <shawn.sung at mediatek.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>