From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 7 Feb 2014 20:37:03 +0000 (-0200)
Subject: drm/i915: Short-circuit no-op vga_set_state()
X-Git-Tag: v3.15-rc1~51^2~59^2~54
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c0cc8a556680afbfc6dc5033bdf9c8d2b85088e2;p=pandora-kernel.git

drm/i915: Short-circuit no-op vga_set_state()

Touching the VGA registers risks a hard machine hang, at least on this
ivb machine after removing a conflicting efifb. This is more than likely
related to the discovery that VGA IO decode on the more recent PCH
platforms is terminally broken.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

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