drm/i915: preserve user forcewake over system suspend/resume
authorImre Deak <imre.deak@intel.com>
Fri, 6 Jun 2014 09:59:39 +0000 (12:59 +0300)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Fri, 13 Jun 2014 13:17:40 +0000 (15:17 +0200)
commit10018603a481e4c1067e825e449f2e19dd737095
tree3c99c0aca46da8116e369f0c4cdfed8f3a68facb
parent9e31c2a590f27309fb8a419ba2943879af26a8cd
drm/i915: preserve user forcewake over system suspend/resume

Atm, the forcewake refcount will be incorrectly set to zero during
system suspend if there is any reference held via the
i915_forcewake_user debugfs entry.

Fix this by simply not zeroing the sw counters during suspend and
restoring the original state using them. Note that the only other
places where we zeroed the counters were driver load and unload time,
where it was redundant anyway.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78059
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/i915_drv.c
drivers/gpu/drm/i915/i915_drv.h
drivers/gpu/drm/i915/intel_uncore.c