6.10-stable review patch. If anyone has any objections, please let me know.
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From: Hsiao Chien Sung shawn.sung@mediatek.com
[ Upstream commit 231c020141cb150a59f5b28379cad82ff7bad899 ]
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: d886c0009bd0 ("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-a9d62... Signed-off-by: Chun-Kuang Hu chunkuang.hu@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 156c6ff547e86..d7d16482c9473 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);