This has originally been added in
commit 8db9d77b1b
Author: Zhenyu Wang <zhenyuw@linux.intel.com>
Date: Wed Apr 7 16:15:54 2010 +0800
drm/i915: Support for Cougarpoint PCH display pipeline
probably to combat issues with hw state left behind by the BIOS. And
indeed, I've checked out that specific revision, and there is no DP
support yet. So the pch dp transcoder won't be correctly disabled, and
that's important since it requires a rether special disable dance:
Just writing 0 to TRANS_DP_CTL won't cut it, since we need to select
the NONE port when disabling, too.
And indeed, things seem to still work, so let's just remove this.
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>