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drm/amd/display: Allow truncation to 10 bits 

The truncation isn't being programmed if the truncation
depth is set to 2, it causes an issue with dce11.2 asic
using 6bit eDP panel. It required to truncate 12:10 in order to
perform spatial dither 10:6.

This change will allow 12:10 truncation to be enabled.

Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Mikita Lipski 2018-03-07 10:49:23 -05:00 committed by Alex Deucher
parent cd2d6c92a8
commit 8bfac12f88
1 changed files with 2 additions and 3 deletions
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5
drivers/gpu/drm/amd/display/dc/dce/dce_opp.c
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@ -128,8 +128,7 @@ static void set_truncation(
return;
}
/* on other format-to do */
if (params->flags.TRUNCATE_ENABLED == 0 ||
params->flags.TRUNCATE_DEPTH == 2)
if (params->flags.TRUNCATE_ENABLED == 0)
return;
/*Set truncation depth and Enable truncation*/
REG_UPDATE_3(FMT_BIT_DEPTH_CONTROL,
@ -144,7 +143,7 @@ static void set_truncation(
/**
* set_spatial_dither
* 1) set spatial dithering mode: pattern of seed
* 2) set spatical dithering depth: 0 for 18bpp or 1 for 24bpp
* 2) set spatial dithering depth: 0 for 18bpp or 1 for 24bpp
* 3) set random seed
* 4) set random mode
* lfsr is reset every frame or not reset