This indicates to the firmware that it can power down various other
components or bring them back up, depending on the target system state.
Reviewed-by: Imre Deak <imre.deak@xxxxxxxxx>
Signed-off-by: Kristen Carlson Accardi <kristen@xxxxxxxxxxxxxxx>
Signed-off-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 7148eac..e54dc6c 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -28,6 +28,7 @@
*/
#include <linux/device.h>
+#include <linux/acpi.h>
#include <drm/drmP.h>
#include <drm/i915_drm.h>
#include "i915_drv.h"
@@ -491,6 +492,7 @@ static int i915_drm_freeze(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_crtc *crtc;
+ pci_power_t opregion_target_state;
intel_runtime_pm_get(dev_priv);
@@ -542,6 +544,12 @@ static int i915_drm_freeze(struct drm_device *dev)
i915_save_state(dev);
+ if (acpi_target_system_state() >= ACPI_STATE_S3)
+ opregion_target_state = PCI_D3cold;
+ else
+ opregion_target_state = PCI_D1;
+ intel_opregion_notify_adapter(dev, opregion_target_state);
+
intel_uncore_forcewake_reset(dev, false);
intel_opregion_fini(dev);
@@ -674,6 +682,8 @@ static int __i915_drm_thaw(struct drm_device *dev, bool restore_gtt_mappings)
dev_priv->modeset_restore = MODESET_DONE;
mutex_unlock(&dev_priv->modeset_restore_lock);
+ intel_opregion_notify_adapter(dev, PCI_D0);
+
intel_runtime_pm_put(dev_priv);
return 0;
}
--
1.9.1
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