[RFC 2/6] drm/i915: do adapter power state notification at runtime PM

[Paulo Zanoni <przanoni@gmail.com>]

From: Paulo Zanoni <paulo.r.zanoni@intel.com>

Now that we are actually setting the device to the D3 state, we should
issue the notification.

Jani originally wrote a similar patch for PC8, but then we discovered
that we were not really changing the PCI D states when
enabling/disabling PC8, so we had to postpone his patch.

Cc: Jani Nikula <jani.nikula@intel.com>
Credits-to: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/i915_drv.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 08fc7ea..a999a3f 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -896,6 +896,7 @@ static int i915_runtime_suspend(struct device *device)
 
 	dev_priv->pm.suspended = true;
 
+	intel_opregion_notify_adapter(dev, PCI_D3cold);
 	pci_save_state(pdev);
 	pci_set_power_state(pdev, PCI_D3cold);
 
@@ -914,6 +915,7 @@ static int i915_runtime_resume(struct device *device)
 
 	pci_set_power_state(pdev, PCI_D0);
 	pci_restore_state(pdev);
+	intel_opregion_notify_adapter(dev, PCI_D0);
 
 	dev_priv->pm.suspended = false;
 
-- 
1.8.3.1