From: Deepak S <deepak.s@xxxxxxxxx>
Instead of waiting for HW to bringup the wells, We force the wells up
before disabling RC6. This is to avoid any register access when wells
are down.
Signed-off-by: Deepak S <deepak.s@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_pm.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 2e1340f..089712a 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3661,6 +3661,12 @@ static void gen6_disable_rps(struct drm_device *dev)
static void valleyview_disable_rps(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
+ unsigned long irqflags;
+
+ /* We need to bring up the wells before disabling the RC6 */
+ spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
+ dev_priv->uncore.funcs.force_wake_get(dev_priv, FORCEWAKE_ALL);
+ spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
I915_WRITE(GEN6_RC_CONTROL, 0);
--
1.8.4.2
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