drm/i915: drop unnecessary clearing of pch dp transcoder timings
authorDaniel Vetter <daniel.vetter@ffwll.ch>
Thu, 29 Nov 2012 14:59:35 +0000 (15:59 +0100)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Thu, 6 Dec 2012 13:37:01 +0000 (14:37 +0100)
commit2f0c2ad18b88691496e23d1ddbc2d0af8f6df5fa
tree4ee03398f8dc094b4a4841bb164a204357e26f3b
parentff50afe9aceb6264a4fbe40459da75170fb9a2a2
drm/i915: drop unnecessary clearing of pch dp transcoder timings

This has originally been added in

commit 8db9d77b1b14fd730561f64beea8c00e4478d7c5
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>
drivers/gpu/drm/i915/intel_display.c