[PATCH v3 02/14] drm/mediatek: Use 8-bit alpha in ETHDR

[Hsiao Chien Sung via B4 Relay]

From: Hsiao Chien Sung <shawn.s...@mediatek.com>

9-bit alpha (max=0x100) is designed for special HDR related
calculation, which should be disabled by default.
Change the alpha value from 0x100 to 0xff in 8-bit form.

Fixes: 119f5173628a ("drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.")
Reviewed-by: AngeloGioacchino Del Regno 
<angelogioacchino.delre...@collabora.com>
Reviewed-by: CK Hu <ck...@mediatek.com>
Signed-off-by: Hsiao Chien Sung <shawn.s...@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_ethdr.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_ethdr.c 
b/drivers/gpu/drm/mediatek/mtk_ethdr.c
index 156c6ff547e8..d7d16482c947 100644
--- a/drivers/gpu/drm/mediatek/mtk_ethdr.c
+++ b/drivers/gpu/drm/mediatek/mtk_ethdr.c
@@ -50,7 +50,6 @@
 
 #define MIXER_INX_MODE_BYPASS                  0
 #define MIXER_INX_MODE_EVEN_EXTEND             1
-#define DEFAULT_9BIT_ALPHA                     0x100
 #define        MIXER_ALPHA_AEN                         BIT(8)
 #define        MIXER_ALPHA                             0xff
 #define ETHDR_CLK_NUM                          13
@@ -169,7 +168,7 @@ void mtk_ethdr_layer_config(struct device *dev, unsigned 
int idx,
                alpha_con = MIXER_ALPHA_AEN | MIXER_ALPHA;
 
        mtk_mmsys_mixer_in_config(priv->mmsys_dev, idx + 1, alpha_con ? false : 
true,
-                                 DEFAULT_9BIT_ALPHA,
+                                 MIXER_ALPHA,
                                  pending->x & 1 ? MIXER_INX_MODE_EVEN_EXTEND :
                                  MIXER_INX_MODE_BYPASS, align_width / 2 - 1, 
cmdq_pkt);
 

-- 
Git-146)