I'm trying to use the two DSI interfaces on the SOM-RK3399v2, but there isn't any documentation on the FA website. I understand I have to configure some DTS files and load the right drivers, but I'm not really sure where to start. My end goal is to use the DSI port as an output for the X server, and right now the DSI interfaces aren't showing up in xrandr. How do I enable them?