drm/i915/color: Downscale degamma lut values read from hardware

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For MTL and beyond, convert back the 24 bit lut values
read from HW to 16 bit values to maintain parity with
userspace values. This way we avoid pipe config mismatch
for pre-csc lut values.

v2: Add helper function to downscale values (Jani)

Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230725083002.3779717-3-chaitanya.kumar.borah@intel.com

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Chaitanya Kumar Borah 2023-07-25 14:00:02 +05:30 • committed by Ankit Nautiyal

parent 435cbb0b0e

commit 14c8fca214

1 changed files with 8 additions and 0 deletions

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drivers/gpu/drm/i915/display/intel_color.c

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