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 5d95a997fd9f9..f8904f73f57b0 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 @@ -292,9 +292,10 @@ 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++)