amdgpu_device_suspend
int amdgpu_device_suspend(struct drm_device *dev, bool suspend, bool fbcon);
amdgpu_device_suspend(dev, true, true);
return amdgpu_device_suspend(drm_dev, true, true);
return amdgpu_device_suspend(drm_dev, false, true);
return amdgpu_device_suspend(drm_dev, true, true);
ret = amdgpu_device_suspend(drm_dev, false, false);