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drm/amd/display: update scaling filters

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Currently there is a minor error in scaling filter coefficients
caused by truncation to fit the HW registers.This error accummulates
with increased taps, but has gone unnoticed due to vast majority of
scaling being done with only 4 taps.

Scaling filters are now updated using HW team's filter generator
which has quantization error minimization built in.

Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Dmytro Laktyushkin 2020-01-29 16:41:20 -05:00 committed by Alex Deucher
parent 6a6c4a4d45
commit 8144148f3d
2 changed files with 1290 additions and 939 deletions
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2204
drivers/gpu/drm/amd/display/dc/dce/dce_scl_filters.c
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drivers/gpu/drm/amd/display/dc/dce/dce_scl_filters_old.c Normal file
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