drm/i915: don't save/restore DP regs for kms
authorDaniel Vetter <daniel.vetter@ffwll.ch>
Wed, 17 Oct 2012 09:32:55 +0000 (11:32 +0200)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Wed, 17 Oct 2012 20:36:29 +0000 (22:36 +0200)
commitf81183f76a46c654709dc9b3a1af6fb4c7fc8a46
tree84490f311593719f8053a9f04301fc0518c5ca0a
parent7346bfa00d09633996941644988b14c4f7c1c9d2
drm/i915: don't save/restore DP regs for kms

We completely compute these anew in each modeset, hence we don't rely
on them containing anything valid after resume.

To avoid breaking any ums setup due to reordering of the reads/writes
simply don't reorder anything, but bracket the reads/writes into if
(!kms) conditionals. More churn, but safer.

v2: Fixup the logic, noticed by Paulo Zanoni.

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Tested-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/i915_suspend.c