Revert "drm/i915/dp: Use auxch precharge value of 5 everywhere"
authorDaniel Vetter <daniel.vetter@ffwll.ch>
Thu, 14 Jun 2012 20:15:00 +0000 (22:15 +0200)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Sat, 16 Jun 2012 13:39:02 +0000 (15:39 +0200)
commit6b4e0a93ff6e45714c72bdce193f719ed94810e3
tree0feef6b03bcc465f48d7d1e315d46b5af3246a08
parent351cfc34db8decb0c5cc1aac7cf1780a0e45c8b1
Revert "drm/i915/dp: Use auxch precharge value of 5 everywhere"

This reverts commit 092945e11c5b84f66dd08f0b87fb729715d377bc.

This commit prevents a DP screen from properly training the link.
Oddly enough it works, once the machine has been warm-booted with an
older kernel.

According to DP docs this _should_ have been the right precharge time.
Also, the commit that originally introduces this was just general snb
DP enabling and didn't mention any specific reason for this special
value. Whatever, trust the reporter that this makes things worse and
let's just revert it.

v2: Less spelling fail.

Cc: Adam Jackson <ajax@redhat.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Reported-by: "Wouter M. Koolen" <W.M.Koolen-Wijkstra@cwi.nl>
Buglink: https://lkml.org/lkml/2012/6/14/301
Cc: stable@vger.kernel.org (only for 3.4)
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/intel_dp.c