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Commit 1cbcfc97 authored by Anthony Koo's avatar Anthony Koo Committed by Alex Deucher
Browse files

drm/amd/display: fix issue where 252-255 values are clipped 



[Why]
When endpoint is at the boundary of a region, such as at 2^0=1
we find that the last segment has a sharp slope and some points
are clipped at the top.

[How]
If end point is 1, which is exactly at the 2^0 region boundary, we
need to program an additional region beyond this point.

Signed-off-by: default avatarAnthony Koo <Anthony.Koo@amd.com>
Reviewed-by: default avatarAric Cyr <Aric.Cyr@amd.com>
Acked-by: default avatarLeo Li <sunpeng.li@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent ac42fd63

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c

+2 −1
Original line number Diff line number Diff line
@@ -357,9 +357,10 @@ bool cm_helper_translate_curve_to_hw_format( 
		seg_distr[7] = 4;

		seg_distr[8] = 4;

		seg_distr[9] = 4;

		seg_distr[10] = 1;



		region_start = -10;

		region_end = 0;

		region_end = 1;

	}



	for (i = region_end - region_start; i < MAX_REGIONS_NUMBER ; i++)