[PATCH 4/5] drm/mediatek: Support "Pre-multiplied" blending in Mixer
From: Hsiao Chien Sung via B4 Relay
Date: Wed Jun 19 2024 - 13:27:28 EST
From: Hsiao Chien Sung <shawn.sung@xxxxxxxxxxxx>
Support "Pre-multiplied" alpha blending mode in Mixer.
Before this patch, only the coverage mode is supported.
Signed-off-by: Hsiao Chien Sung <shawn.sung@xxxxxxxxxxxx>
---
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 48b714994492..bc43d0d760c1 100644
--- a/drivers/gpu/drm/mediatek/mtk_ethdr.c
+++ b/drivers/gpu/drm/mediatek/mtk_ethdr.c
@@ -177,7 +177,8 @@ void mtk_ethdr_layer_config(struct device *dev, unsigned int idx,
alpha_con |= state->base.alpha & MIXER_ALPHA;
}
- if (state->base.pixel_blend_mode == DRM_MODE_BLEND_PIXEL_NONE)
+ if (state->base.pixel_blend_mode == DRM_MODE_BLEND_PIXEL_NONE ||
+ state->base.pixel_blend_mode == DRM_MODE_BLEND_PREMULTI)
alpha_con |= PREMULTI_SOURCE;
else
alpha_con |= NON_PREMULTI_SOURCE;
--
Git-146)