On 05/03/2025 01:59, Tim Surber wrote: > Hi Dmitry, > > I did some more testing. That the Apple TV did not work was a bit > misleading. > > It was just, that the Apple TV defaulted to 4:4:4 Chroma which does not > work at all for me. (The same happens using the vendor driver). > > When I changed the EDID to match the vendor driver the HDMI handshake > happened with 4:2:0 chroma, where I could verify even 4k60fps using your > driver, nice! > > So the remaining problems I see are: > - 4:4:4 chroma not working in any resolution > - 4:2:2 and RGB not working in 4k60fps (is this a hardware limitation?) > > A possible workaround could be to disable these non supported formats in > the default EDID. I would like to merge this driver this week, since otherwise it will likely slip to v6.16. So if there is a working EDID, perhaps it can be used for now, and later on it can be patched if there is a better EDID. Would this EDID work? Tim, can you try this? v4l2-ctl --set-edid type=hdmi-4k-600mhz,ycbcr444,ycbcr422 Alternatively, if there is indeed a HW limitation that prevents 4kp60 to work, try this: v4l2-ctl --set-edid type=hdmi-4k-300mhz,ycbcr444,ycbcr422 Whichever of the two works is what we can use as default EDID. Regards, Hans
