tree 6ddaad6df7b4d031ae960727edf6f1a34b1c0ff1
parent 75fa041de7d520007cdf519fed5c208f5ffffdf4
author Chris Wilson <chris@chris-wilson.co.uk> 1391805423 -0200
committer Daniel Vetter <daniel.vetter@ffwll.ch> 1392227576 +0100

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>