It doesn't give any specifics about what changed on the HDMI Forum side, but this article [0] from June indicates that Valve worked closely with AMD to get it p

It doesn't give any specifics about what changed on the HDMI Forum side, but this article [0] from June indicates that Valve worked closely with AMD to get it pushed through prior to the release of the Steam Machine (which supports HDMI 2.1 VRR). [0] https://www.digitalfoundry.net/news/2026/06/valves-hdmi-2-1-saga-is-fully-resolved-with-a-final-frl-update-to-come-for-full-4k-240hz-support https://www.digitalfoundry.net/news/2026/06/valves-hdmi-2-1-...