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drm/i915: send proper opregion notifications on suspend/resume 

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@intel.com>
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jesse Barnes 2014-06-12 08:35:47 -07:00 committed by Daniel Vetter
parent 10d8d36679
commit e5747e3adc
1 changed files with 10 additions and 0 deletions
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10
drivers/gpu/drm/i915/i915_drv.c
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@ -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"
@ -499,6 +500,7 @@ 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);
@ -548,6 +550,12 @@ 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);
@ -680,6 +688,8 @@ 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;
}