drm/i915/gen8+: Add RC6 CTX corruption WA
authorImre Deak <imre.deak@intel.com>
Thu, 17 Oct 2019 13:38:31 +0000 (16:38 +0300)
committerDave Airlie <airlied@redhat.com>
Thu, 14 Nov 2019 00:51:54 +0000 (10:51 +1000)
commit2248a28384fedb84d1d068383bbec113cc4ce0fe
tree13b39db147461ad288d38d8232dafcc3055d81bc
parent94bc7f56a8afd0522439a48162b8b8167c227c89
drm/i915/gen8+: Add RC6 CTX corruption WA

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>
drivers/gpu/drm/i915/gt/intel_gt_pm.c
drivers/gpu/drm/i915/gt/intel_rc6.c
drivers/gpu/drm/i915/gt/intel_rc6.h
drivers/gpu/drm/i915/gt/intel_rc6_types.h
drivers/gpu/drm/i915/i915_drv.c
drivers/gpu/drm/i915/i915_drv.h
drivers/gpu/drm/i915/i915_reg.h