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.
DP also has the DRMs HDCP 2.2 and DisplayPort content protection 1.0
And MPEG LA claims they have patents that are needed to implement the DP standard.