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Commit e5747e3a authored by Jesse Barnes's avatar Jesse Barnes Committed by Daniel Vetter
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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: default avatarImre Deak <imre.deak@intel.com>
Signed-off-by: default avatarKristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 10d8d366

drivers/gpu/drm/i915/i915_drv.c

+10 −0
Original line number Diff line number Diff line
@@ -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;

}