drm/i915: don't disable the power well yet
authorPaulo Zanoni <paulo.r.zanoni@intel.com>
Fri, 22 Mar 2013 17:07:23 +0000 (14:07 -0300)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Sun, 24 Mar 2013 12:22:33 +0000 (13:22 +0100)
commit2124b72e6283c4e84a55e71077fee91793f4c801
tree03cb24a812671a14fed63359fa673b5f34c3250f
parentbba2181c49f1dddf8b592804a1b53cc1a3cf408a
drm/i915: don't disable the power well yet

We're still not 100% ready to disable the power well, so don't disable
it for now. When we disable it we break the audio driver (because some
of the audio registers are on the power well) and machines with eDP on
port D (because it doesn't use TRANSCODER_EDP).

Also, instead of just reverting the code, add a Kernel option to let
us disable it if we want. This will allow us to keep developing and
testing the feature while it's not enabled.

This fixes problems caused by the following commit:
  commit d6dd9eb1d96d2b7345fe4664066c2b7ed86da898
  Author: Daniel Vetter <daniel.vetter@ffwll.ch>
  Date:   Tue Jan 29 16:35:20 2013 -0200
       drm/i915: dynamic Haswell display power well support

References: http://www.mail-archive.com/intel-gfx@lists.freedesktop.org/msg18788.html
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/i915_drv.c
drivers/gpu/drm/i915/i915_drv.h
drivers/gpu/drm/i915/intel_pm.c