Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 5.2 22/70] drm/amd/display: fix issue where 252-255 values are clipped | Date | Tue, 24 Sep 2019 12:45:01 -0400 |
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From: Anthony Koo <Anthony.Koo@amd.com>
[ Upstream commit 1cbcfc975164f397b449efb17f59d81a703090db ]
[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: Anthony Koo <Anthony.Koo@amd.com> Reviewed-by: Aric Cyr <Aric.Cyr@amd.com> Acked-by: Leo Li <sunpeng.li@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c index 7469333a2c8a5..8166fdbacd732 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c @@ -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++) -- 2.20.1
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