

Copyright is always about distribution. So yes, you are allowed to fork, but you are not allowed to distribute the copyrighted content to other people. And with the No Derivatives clause you are also not allowed to change it. You might be able to stay in the gray are by telling everyone “build it yourself”, but nobody would be allowed to package it either.
Knowbe your enemy, they say.But jokes aside, I believe DisplayLink’s focus is primarily on the client<->docking station part, with docking station<->monitor usually still being HDMI/DP (same with direct client<->monitor links). So they still have to interface with it some way or another.