https://blog.wongcw.com/2020/05/08/lg%e9%a6%96%e7%99%bchdmi-2-1%e9%9b%bb%e8%a6%96%e5%a6%82%e4%bb%8a%e5%8d%bb%e5%80%92%e8%bb%8a%e7%99%bc%e6%ae%98%e8%a1%80%e7%89%88/