From: Hsiao Chien Sung <shawn.s...@mediatek.com>
Support "None" blend mode on MediaTek's chips.
Please refer to the description of the commit
"drm/mediatek: Support alpha blending in display driver"
for more information.
Signed-off-by: Hsiao Chien Sung <shawn.s...@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 4b12ca285e84b..951e3e82a6a1a 100644
--- a/drivers/gpu/drm/mediatek/mtk_ethdr.c
+++ b/drivers/gpu/drm/mediatek/mtk_ethdr.c
@@ -178,7 +178,8 @@ void mtk_ethdr_layer_config(struct device *dev, unsigned
int idx,
if (state->base.pixel_blend_mode != DRM_MODE_BLEND_COVERAGE)
mix_con |= 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
