drm/i915: leave rc6 enabled at suspend time v4
This allows the system to enter the lowest power mode during system freeze.
v2: delete force wake timer at suspend (Imre)
v3: add GT work suspend function (Imre)
v4: use uncore forcewake reset (Daniel)
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index d1e53ab..685b491 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4675,6 +4675,26 @@
valleyview_cleanup_gt_powersave(dev);
}
+/**
+ * intel_suspend_gt_powersave - suspend PM work and helper threads
+ * @dev: drm device
+ *
+ * We don't want to disable RC6 or other features here, we just want
+ * to make sure any work we've queued has finished and won't bother
+ * us while we're suspended.
+ */
+void intel_suspend_gt_powersave(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ /* Interrupts should be disabled already to avoid re-arming. */
+ WARN_ON(dev->irq_enabled);
+
+ flush_delayed_work(&dev_priv->rps.delayed_resume_work);
+
+ cancel_work_sync(&dev_priv->rps.work);
+}
+
void intel_disable_gt_powersave(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;