Comment # 3 on bug 1177169 from Nicolas Patricio Saenz Julienne

(In reply to Axel Braun from comment #2)
> (In reply to Nicolas Patricio Saenz Julienne from comment #1)
> > Just for the record, there isn't sound on the jack output upstream either.
> 
> In Raspian? I understood this different from
> https://lists.infradead.org/pipermail/linux-rpi-kernel/2020-September/007872.
> html (and it would be...no good move)

Stefan's right. Sound over HDMI will most likely be available as of Linux
v5.10, the patches are already in linux-next. Sound over the Jack depends on
VCHIQ, which is a staging driver and has no support for RPi4 at the moment.

Obviously, all this works with Raspberry Pi OS, but they use their own tailor
made downstream kernels. We can use that, as we have a single kernel image for
all arm64 devices.