drm/amd/display: Add wait for flip not pending on pipe unlock

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[Why]
Lack of proper timing caused intermittent underflow on unplug external DP.
A previous fix was invalid and caused S0i3 regression, so had to be reverted.

[How]
When unlocking pipe, wait for no pipes to have flip pending before unlocking.

Signed-off-by: Noah Abradjian <noah.abradjian@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Noah Abradjian 2019-11-18 13:59:57 -05:00 • committed by Alex Deucher

parent a37149425a

commit 6b5d7730d2

1 changed files with 36 additions and 3 deletions

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39

drivers/gpu/drm/amd/display/dc/core/dc.c

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