Just about any distribution should work out of the box. At least on the LCD model. Don’t know how far the kernel sources are upstreamed for the OLED model.

I run OpenSUSE on my Deck. I did some tinkering to get it to a state I like. Unfortunately I don’t have the energy to list everything. For many things I have created posts on Lemmy, should be my older stuff.

At gitlab.com/evlaV you can find all the sources from Valve’s changes. If you have an OLED model you should be able to get a fully working kernel from here. For my LCD I created DKMS modules for the fan and controller.