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Jay Liu 20ac36b71c drm/mediatek: Fix CCORR mtk_ctm_s31_32_to_s1_n function issue
if matrixbit is 11,
The range of color matrix is from 0 to (BIT(12) - 1).
Values from 0 to (BIT(11) - 1) represent positive numbers,
values from BIT(11) to (BIT(12) - 1) represent negative numbers.
For example, -1 need converted to 8191.
so convert S31.32 to HW Q2.11 format by drm_color_ctm_s31_32_to_qm_n,
and set int_bits to 2.

Fixes: 738ed4156f ("drm/mediatek: Add matrix_bits private data for ccorr")
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Jay Liu <jay.liu@mediatek.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20250921055416.25588-2-jay.liu@mediatek.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
History 2025-11-18 13:46:12 +00:00
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