uvc_pm_get
ret = uvc_pm_get(handle->chain->dev);
ret = uvc_pm_get(handle->chain->dev);
ret = uvc_pm_get(stream->dev);
ret = uvc_pm_get(handle->stream->dev);
ret = uvc_pm_get(handle->stream->dev);
int uvc_pm_get(struct uvc_device *dev);