drm/amd/display: wait for vblank during pipe programming

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[ Upstream commit 203ccaf586 ]

[WHY]
Skipping vblank during global sync update request can result in
underflow on certain displays.

[HOW]
Roll back to the previous behavior where DC waits for vblank during pipe
programming.

Fixes: 5d3e144214 ("drm/amd/display: do not wait for vblank during pipe programming")
Tested-by: Mark Broadworth <mark.broadworth@amd.com>
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Haiyi Zhou <Haiyi.Zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Haiyi Zhou 2022-10-20 11:46:54 -04:00 • committed by Greg Kroah-Hartman

parent f87cd02c3b

commit 2734b3eb72

1 changed files with 2 additions and 4 deletions

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drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c

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