drm/i915: Re-apply "Perform link quality check, unconditionally during long pulse"
authorJan-Marek Glogowski <glogow@fbihome.de>
Sat, 25 Aug 2018 19:10:35 +0000 (15:10 -0400)
committerLyude Paul <lyude@redhat.com>
Sat, 25 Aug 2018 19:33:48 +0000 (15:33 -0400)
commit3cf71bc9904d7ee4a25a822c5dcb54c7804ea388
treee8d87d4198cc5304b0b303efc3c52d6d23540981
parentf7480b2f65919d104ee41c2b609bc4ae3a3e6d60
drm/i915: Re-apply "Perform link quality check, unconditionally during long pulse"

This re-applies the workaround for "some DP sinks, [which] are a
little nuts" from commit 1a36147bb939 ("drm/i915: Perform link
quality check unconditionally during long pulse").
It makes the secondary AOC E2460P monitor connected via DP to an
acer Veriton N4640G usable again.

This hunk was dropped in commit c85d200e8321 ("drm/i915: Move SST
DP link retraining into the ->post_hotplug() hook")

Fixes: c85d200e8321 ("drm/i915: Move SST DP link retraining into the ->post_hotplug() hook")
[Cleaned up commit message, added stable cc]
Signed-off-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Jan-Marek Glogowski <glogow@fbihome.de>
Cc: stable@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20180825191035.3945-1-lyude@redhat.com
drivers/gpu/drm/i915/intel_dp.c