One of the limitations of the AMDGPU Linux kernel graphics driver has been the lack of its support for HDMI 2.1 and later. AMD has wanted to support HDMI 2.1+ functionality under Linux but it’s been legally blocked by the HDMI Forum. But anxious independent users have been working on open-source patches for wiring up HDMI 2.1 into the AMDGPU driver outside of the realm of AMD and the HDMI Forum’s blessings. ……
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They have been in recent years in the form of USB-C Alt Mode.
I didn’t realize alt mode used DP (but I guess that makes sense) - good to know, will definitely look for that in my next TV
Yeah USB-C doesn’t support HDMI at all. All USB-C+HDMI adapters use DP signalling on the cable.