drm/amd/display: Update TTU properly

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[Why]
We need to update TTU properly if DRAMClockChangeWatermark changes. If
TTU < DRAMClockChangeWatermark, we pstate won't be allowed and we will
hang in some PSR cases.

[How]
Update TTU if DramClockChangeWatermark value increases (only if TTU was
dependent on the watermark value on the DRAMClockChangeWatermark value
in the first place).

Signed-off-by: Alvin Lee <alvin.lee2@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>

...

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Alvin Lee 2020-02-13 09:58:36 -05:00 • committed by Alex Deucher

parent 41ef3dcd86

commit a18463eff7

1 changed files with 8 additions and 0 deletions

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drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20v2.c

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