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drm/mediatek: Use 8-bit alpha in ETHDR

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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: d886c0009b ("drm/mediatek: Add ETHDR support for MT8195")
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20240620-igt-v3-2-a9d62d2e2c7e@mediatek.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
This commit is contained in:
Hsiao Chien Sung 2024-06-20 00:38:42 +08:00 committed by Chun-Kuang Hu
parent 86b89dc669
commit 231c020141
1 changed files with 1 additions and 2 deletions
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3
drivers/gpu/drm/mediatek/mtk_ethdr.c
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@ -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);