Brief summary of the problem: I have a RX 6800 XT connected to a LG B9 TV via HDMI. As both...
Alex Deucher:
The HDMI Forum has rejected our proposal unfortunately. At this time an open source HDMI 2.1 implementation is not possible without running afoul of the HDMI Forum requirements.
The HDMI licensing BS makes it rather useless. At least most monitors and GPUs have DisplayPort now. It's mostly just TVs that are still limited to HDMI.
It's not just limited to PC's. USB C has a DisplayPort alternate mode and many phones and tablets support it now.
I'm rather surprised manufacturers haven't started putting USB C ports on TV's for video input yet.