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In some circumstances the RC6 context can get corrupted. We can detect
this and take the required action, that is disable RC6 and runtime PM.
The HW recovers from the corrupted state after a system suspend/resume
cycle, so detect the recovery and re-enable RC6 and runtime PM.
v2: rebase (Mika)
v3:
- Move intel_suspend_gt_powersave() to the end of the GEM suspend
sequence.
- Add commit message.
v4:
- Rebased on intel_uncore_forcewake_put(i915->uncore, ...) API
change.
v5:
- Rebased on latest upstream gt_pm refactoring.
v6:
- s/i915_rc6_/intel_rc6_/
- Don't return a value from i915_rc6_ctx_wa_check().
v7:
- Rebased on latest gt rc6 refactoring.
Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
[airlied: pull this later version of this patch into drm-next
to make resolving the conflict mess easier.]
Signed-off-by: Dave Airlie <airlied@redhat.com>