drm/dp: retry AUX transactions 32 times (v1.1)

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commit 19a93f042f upstream.

At least on two MST devices I've tested with, when
they are link training downstream, they are totally
unable to handle aux ch msgs, so they defer like nuts.
I tried 16, it wasn't enough, 32 seems better.

This fixes one Dell 4k monitor and one of the
MST hubs.

v1.1: fixup comment (Tom).

Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Dave Airlie 2014-11-26 13:13:09 +10:00 • committed by Greg Kroah-Hartman

parent f5f6dd6dad

commit 1cc635aa16

1 changed files with 4 additions and 3 deletions

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drivers/gpu/drm/drm_dp_helper.c

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