ijor wrote:I think it probably remains to be seen if it would be compatible with HDMI 2.1 VRR. I don't know the low level details of VRR. Anyone have access to the specs or have seen a low level technical description? I understand it can accept an arbitrary refresh rate. But can it accept an arbitrary pixel clock as well? Or the refresh cycle must be a multiple of the standard pixel clock cycle for the given resolution?
These are exactly my thoughts. New VRR TV sets will be able to process more unusual refresh rates than current ones, but we’ll have to see if they’ll simply accept strange timings over HDMI 1.4 or if they’ll need specific HDMI 2.1 handshakes/signals. Honestly we don’t even need the first V in VRR, the Variable aspect is tied to modern gaming with the GPU asking the Display to show the rendered frame as soon it’s available; with retro computing/gaming we need just odd framerates.
HDMI 2.1 VRR came to my mind reading a Byuu’s post about Higan being able to perfectly emulate a 6.098Hz SNES output only on G-Sync and FreeSync monitors; so I made the G-Sync:Higan=VRR:FPGA proportion.