From: Sagar Kamble <sagar.a.kam...@intel.com>
To do a platform wide S0i3 transition, Gfx is required to go
to D3_hot state. pci_save_state and pci_restore_state needed to avoid ring
hangs across D3_hot transitions.
Cc: Daniel Vetter <daniel.vet...@ffwll.ch> (supporter:INTEL DRM DRIVERS...)
Cc: Jani Nikula <jani.nik...@linux.intel.com> (supporter:INTEL DRM DRIVERS...)
Signed-off-by: Sagar Kamble <sagar.a.kam...@intel.com>
---
drivers/gpu/drm/i915/i915_drv.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 5a08c86..70bb456 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1412,6 +1412,11 @@ static int intel_runtime_suspend(struct device *device)
* via the suspend path.
*/
intel_opregion_notify_adapter(dev, PCI_D1);
+ if (IS_VALLEYVIEW(dev)) {
+ pci_save_state(pdev);
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, PCI_D3hot);
+ }
DRM_DEBUG_KMS("Device suspended\n");
return 0;
@@ -1428,6 +1433,12 @@ static int intel_runtime_resume(struct device *device)
DRM_DEBUG_KMS("Resuming device\n");
+ if (IS_VALLEYVIEW(dev)) {
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+ pci_enable_device(pdev);
+ }
+
intel_opregion_notify_adapter(dev, PCI_D0);
dev_priv->pm.suspended = false;
--
1.8.5
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