HDMI 2.1 support coming to Linux and Valve's Steam Machine courtesy of AMD
… However, a post on the Phoronix forums from a "prominent" Linux developer at AMD says that HDMI 2.1 is coming soon, with the general understanding that the code and work have been completed for a while, and that the hold-up is compliance and the legalities surrounding implementing HDMI 2.1 support. …