drm/amd/display: Check for flip pending before locking pipes.

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[Why]
When running a game/benchmark with v-sync disabled, disabling a plane
(which is v-sync) can cause an underflow. This is due to flips that are
pending before pipe locking being applied after locks are released and
pipes have been re-arranged or disconnected. This can potentially apply
a flip on the incorrect pipe.

[How]
Check that any pending flips are cleared before locking any pipes to
ensure flips are applied on the correct pipes.

Signed-off-by: Taimur Hassan <syed.hassan@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Taimur Hassan 2020-09-10 10:13:42 -04:00 • committed by Alex Deucher

parent a9edc81564

commit 99d1437aa0

4 changed files with 14 additions and 13 deletions

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11

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

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12

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

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2

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.h

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2

drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h

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