[PATCH v3] drm/i915: Force GPU Freq to lowest while suspending.

[deepak.s@linux.intel.com]

From: Deepak S <deepak.s@linux.intel.com>

We might be leaving the GPU Frequency (and thus vnn) high during the suspend.
Force gt to move to lowest freq while suspending.

v2: Fixed typo in commit message (Deepak)

v3: Force gt to lowest freq in suspend_gt_powersave (Daniel)

Signed-off-by: Deepak S <deepak.s@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 2043c4b..6bbb90b 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4881,6 +4881,9 @@ void intel_suspend_gt_powersave(struct drm_device *dev)
 	/* Interrupts should be disabled already to avoid re-arming. */
 	WARN_ON(dev->irq_enabled);
 
+	/* Force GPU to min freq during suspend */
+	gen6_rps_idle(dev_priv);
+
 	flush_delayed_work(&dev_priv->rps.delayed_resume_work);
 
 	cancel_work_sync(&dev_priv->rps.work);
-- 
1.9.1