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drm/amd/display: Allow spatial dither to 10 bpc on all DCE 

Spatial dithering to 10 bpc depth was disabled for all DCE's.

Testing on DCE-8.3 and DCE-11.2 did not show any obvious ill
effects, but a measureable precision improvement (via colorimeter)
when displaying a fp16 framebuffer to a 10 bpc DP or HDMI connected
HDR-10 monitor.

v2: enable it for all DCEs (Alex)

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Cc: Alex Deucher <alexdeucher@gmail.com>
Reviewed-by: Mario Kleiner <mario.kleiner.de@gmail.com> (v2)
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Mario Kleiner 2021-02-12 23:29:54 +01:00 committed by Alex Deucher
parent d7faf6f534
commit afdd1de0f9
1 changed files with 1 additions and 3 deletions
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4
drivers/gpu/drm/amd/display/dc/dce/dce_opp.c
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@ -216,9 +216,7 @@ static void set_spatial_dither(
REG_UPDATE(FMT_BIT_DEPTH_CONTROL,
FMT_TEMPORAL_DITHER_EN, 0);
/* no 10bpc on DCE11*/
if (params->flags.SPATIAL_DITHER_ENABLED == 0 ||
params->flags.SPATIAL_DITHER_DEPTH == 2)
if (params->flags.SPATIAL_DITHER_ENABLED == 0)
return;
/* only use FRAME_COUNTER_MAX if frameRandom == 1*/