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authorHsiao Chien Sung <shawn.sung@mediatek.com>2024-07-17 13:24:41 +0800
committerChun-Kuang Hu <chunkuang.hu@kernel.org>2024-07-31 13:21:30 +0000
commit1f66fe62cc092d2f6a2f895ec3be86d2c326947c (patch)
treea9cfab51b21be40f07693e1be5dd8ea3ec256cdf
parent8400291e289ee6b2bf9779ff1c83a291501f017b (diff)
drm/mediatek: Support "None" blending in OVL
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> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Link: https://patchwork.kernel.org/project/dri-devel/patch/20240717-alpha-blending-v4-1-4b1c806c0749@mediatek.com/ Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
-rw-r--r--drivers/gpu/drm/mediatek/mtk_disp_ovl.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
index 9d6d9fd8342e..add671c38613 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -434,6 +434,7 @@ void mtk_ovl_layer_config(struct device *dev, unsigned int idx,
unsigned int fmt = pending->format;
unsigned int offset = (pending->y << 16) | pending->x;
unsigned int src_size = (pending->height << 16) | pending->width;
+ unsigned int blend_mode = state->base.pixel_blend_mode;
unsigned int ignore_pixel_alpha = 0;
unsigned int con;
bool is_afbc = pending->modifier != DRM_FORMAT_MOD_LINEAR;
@@ -463,7 +464,8 @@ void mtk_ovl_layer_config(struct device *dev, unsigned int idx,
* For RGB888 related formats, whether CONST_BLD is enabled or not won't
* affect the result. Therefore we use !has_alpha as the condition.
*/
- if (state->base.fb && !state->base.fb->format->has_alpha)
+ if ((state->base.fb && !state->base.fb->format->has_alpha) ||
+ blend_mode == DRM_MODE_BLEND_PIXEL_NONE)
ignore_pixel_alpha = OVL_CONST_BLEND;
if (pending->rotation & DRM_MODE_REFLECT_Y) {