From: Hsiao Chien Sung <shawn.sung@xxxxxxxxxxxx>
Support "None" alpha blending mode on MediaTek's chips.
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 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
--
2.18.0
