Yeah, also the Steam Link is quite nice, and I have used it with XBox, PS and Steam controllers.
Now the issue here is that I am trying to boycott Steam, what kind of open source support is there for Valve's hardware : Steam Link, Controller, Deck, whatever their VR headsets are called ..?
I think the most unusual driver you'll need for the Deck is the controller. There's upcoming mainline Linux support[0], which Steam Controller already has. The default behavior either has it emulate a mouse/keyboard, or requires Steam to act as a driver. There's an open source project to do gyro mapping and all that the Steam client does, and they're working on Deck Controller support[1]
Now the issue here is that I am trying to boycott Steam, what kind of open source support is there for Valve's hardware : Steam Link, Controller, Deck, whatever their VR headsets are called ..?