tree bd9560c2defea866ff255e5aac8274928b713068
parent edbfdb456053d0738e6b06a3827ead4158bfc918
author Paulo Zanoni <paulo.r.zanoni@intel.com> 1375826234 -0300
committer Daniel Vetter <daniel.vetter@ffwll.ch> 1377262347 +0200

drm/i915: don't update GEN6_PMIMR when it's not needed

I did some brief tests and the "new_val = pmimr" condition usually
happens a few times after exiting games.

Note: This is also prep work to track the GEN6_PMIMR register state in
dev_priv->pm_imr. This happens in the next patch.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
[danvet: Add note to explain why we want this, as per the discussion
between Chris and Paulo.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>