tree d31f72b8e75f8e29590e63b6620161dd253ea69c
parent 0c241d5b2770d4a50d3367ed591d0d0236b69b51
author Ville Syrjälä <ville.syrjala@linux.intel.com> 1446146758 +0200
committer Ville Syrjälä <ville.syrjala@linux.intel.com> 1447165416 +0200

drm/i915: Hide underruns from eDP PLL and port enable on ILK

We get underruns on the other pipe when enabling the CPU eDP PLL and
port on ILK.

Bspec knows about the PLL issue, and recommends doing a vblank wait just
prior to enabling the PLL. That does seem to help, but unfortunately we
get another underrun when actually enabling the CPU eDP port. Bspec
doesn't mention that at all, and the same vblank wait trick doesn't
appear to be effective there.

Since I have no better clue how to deal with this, just hide the errors.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1446146763-31821-10-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>