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drm/i915/guc: Disable rpm wakeref asserts in GuC irq handler

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We're seeing "RPM wakelock ref not held during HW access" warning
otherwise. Since IRQs are synced for runtime suspend we can just disable
the wakeref asserts.

Reported-by: Marta Löfstedt <marta.lofstedt@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105710
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180714173703.7894-1-chris@chris-wilson.co.uk
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Michał Winiarski 2018-07-14 18:37:03 +01:00 committed by Chris Wilson
parent 60a9432454
commit e5cae65959
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/i915/intel_guc.c
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@ -466,11 +466,13 @@ void intel_guc_to_host_event_handler_mmio(struct intel_guc *guc)
* could happen that GuC sets the bit for 2nd interrupt but Host
* clears out the bit on handling the 1st interrupt.
*/
disable_rpm_wakeref_asserts(dev_priv);
spin_lock(&guc->irq_lock);
val = I915_READ(SOFT_SCRATCH(15));
msg = val & guc->msg_enabled_mask;
I915_WRITE(SOFT_SCRATCH(15), val & ~msg);
spin_unlock(&guc->irq_lock);
enable_rpm_wakeref_asserts(dev_priv);
intel_guc_to_host_process_recv_msg(guc, msg);
}