> A significant negotiation took place late last year on Valve's side. Given its use of AMD hardware and experience, Valve attempted to engage with the HDMI Forum leadership to gain approval for the open-source implementation. ... Valve's SteamOS uses open-source AMD GPU driver components because the Steam Machine runs on an AMD RDNA 3 GPU, and the company's negotiations seem to have done their part.
A lot can be said about the proprietary and closed nature of Steam. But for a while, and even more in recent year, Valve has truly contributed in a good faith manner to free softwares and the linux community. Sure, it's to serve they own interest in selling Steam-branded hardware, but they probably could have gone the easier route that a lot of vendor ends up to where they contribute the minimum and keep a lot of things proprietary (making things like hdmi 2.1 support easier).