22 Jun
2018
22 Jun
'18
3:40 p.m.
https://bugs.freedesktop.org/show_bug.cgi?id=106999
--- Comment #14 from Ilia Mirkin imirkin@alum.mit.edu --- (In reply to Mike Lothian from comment #13)
I know my SkyQ box outputs at 2160@60Hz in 10bit colour
https://en.wikipedia.org/wiki/HDMI#Refresh_frequency_limits_for_HDR10_video
4k@60@10bpc needs YUV 4:2:2 for HDMI 2.0, so it can't handle RGB (or YUV 4:4:4). That's probably the discrepancy - there's currently no great way for userspace to select which encoding variant is to be used (or what bpc to send it at).
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