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| author | Hsiao Chien Sung <shawn.sung@mediatek.com> | 2024-06-20 00:50:24 +0800 |
|---|---|---|
| committer | AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> | 2024-06-27 12:41:51 +0200 |
| commit | 7cc069d9286c21e0acb399da26a181bafdca4d7e (patch) | |
| tree | 6a3a649c3a370b818c2b754178cc7e07bb66a164 /drivers/soc | |
| parent | 161ee1eb9ab2440553dac55ada8329de704b1ffd (diff) | |
| download | lwn-7cc069d9286c21e0acb399da26a181bafdca4d7e.tar.gz lwn-7cc069d9286c21e0acb399da26a181bafdca4d7e.zip | |
soc: mediatek: Disable 9-bit alpha in ETHDR
When 9-bit alpha is enabled, its value will be converted from 0-255 to
0-256 (255 = not defined). This is designed for special HDR related
calculation, which should be disabled by default, otherwise, alpha
blending will not work correctly.
Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20240620-9bit_alpha-v1-1-13c69daaf29f@mediatek.com
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Diffstat (limited to 'drivers/soc')
| -rw-r--r-- | drivers/soc/mediatek/mtk-mmsys.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/soc/mediatek/mtk-mmsys.c b/drivers/soc/mediatek/mtk-mmsys.c index f370f4ec4b88..938240714e54 100644 --- a/drivers/soc/mediatek/mtk-mmsys.c +++ b/drivers/soc/mediatek/mtk-mmsys.c @@ -236,6 +236,7 @@ void mtk_mmsys_mixer_in_config(struct device *dev, int idx, bool alpha_sel, u16 mtk_mmsys_update_bits(mmsys, MT8195_VDO1_MIXER_IN1_ALPHA + (idx - 1) * 4, ~0, alpha << 16 | alpha, cmdq_pkt); + mtk_mmsys_update_bits(mmsys, MT8195_VDO1_HDR_TOP_CFG, BIT(15 + idx), 0, cmdq_pkt); mtk_mmsys_update_bits(mmsys, MT8195_VDO1_HDR_TOP_CFG, BIT(19 + idx), alpha_sel << (19 + idx), cmdq_pkt); mtk_mmsys_update_bits(mmsys, MT8195_VDO1_MIXER_IN1_PAD + (idx - 1) * 4, |