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[ Upstream commite00a2e5d48] Starting with DPCD version 2.0 bits 6:3 of the DP_DSC_BITS_PER_PIXEL_INC DPCD register contains the NativeYCbCr422_MAX_bpp_DELTA field, which can be non-zero as opposed to earlier DPCD versions, hence decoding the bit_per_pixel increment value at bits 2:0 in the same register requires applying a mask, do so. Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com> Fixes:0c2287c965("drm/display/dp: Add helper function to get DSC bpp precision") Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20250212161851.4007005-1-imre.deak@intel.com Signed-off-by: Sasha Levin <sashal@kernel.org>