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