drm/amd/display: Correct algorithm for reversed gamma

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[Why]
DCN30 needs to correctly program reversed gamma curve, which DCN20
already has.
Also needs to fix a bug that 252-255 values are clipped.

[How]
Apply two fixes into DCN30.

Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Calvin Hou <Calvin.Hou@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Acked-by: Solomon Chiu <solomon.chiu@amd.com>
Acked-by: Vladimir Stempen <Vladimir.Stempen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Calvin Hou 2021-03-02 10:48:26 -05:00 • committed by Alex Deucher

parent 8c2f14c36f

commit ef08f9c2aa

1 changed files with 18 additions and 8 deletions

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26

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_cm_common.c

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