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| author | Anthony Koo <Anthony.Koo@amd.com> | 2019-07-12 10:52:54 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-07 18:58:53 +0200 |
| commit | 73de2baa5b3c54d6c457c78964615cac1408caf6 (patch) | |
| tree | 8b795205f8b56531c1604993034cdae8119a7984 | |
| parent | 98ecf758e63fd47b5d0ca67af1d109c817ef64a3 (diff) | |
| download | linux-stable-73de2baa5b3c54d6c457c78964615cac1408caf6.tar.gz linux-stable-73de2baa5b3c54d6c457c78964615cac1408caf6.tar.bz2 linux-stable-73de2baa5b3c54d6c457c78964615cac1408caf6.zip | |
drm/amd/display: fix issue where 252-255 values are clipped
[ 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>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn10/dcn10_cm_common.c | 3 |
1 files changed, 2 insertions, 1 deletions
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 7469333a2c8a..8166fdbacd73 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++) |