[Sound-open-firmware] [PATCH v2 00/12] [RESEND] ASoC: SOF DSP virtualisation

[Liam Girdwood]

On Fri, 2020-04-03 at 13:04 +0200, Guennadi Liakhovetski wrote:
> Hi Mark,
> 
> On Fri, Apr 03, 2020 at 10:28:42AM +0100, Mark Brown wrote:
> > On Fri, Apr 03, 2020 at 11:13:54AM +0200, Guennadi Liakhovetski
> > wrote:
> > > This patch series extends the SOF driver to add support for DSP
> > > virtualisation to ASoC. It is built on top of VirtIO, contains a
> > > guest driver and a vhost in-kernel guest driver. This version
> > > supports a single playback and a single capture interface on the
> > > guest. The specific guest audio topology is supplied by the host
> > 
> > I've asked a couple of times for documentation of the protocol here
> > but
> > don't think I've seen anything yet?

Sorry Mark, the whole series should not have been sent since we are
still pending on some OASIS standards being ratified. Guennadi, please
just send the patches that add the protocol independent dependencies to
ASoC and SOF driver only for review atm (patches 1,2,3,5,6 & 7).

The full series is blocking on

1) the virto-snd patches being merged. This will then allow the code
(when modified) to run HDA like audio on SOF DSPs.

2) virtio DMA buffer sharing being concluded for "zero copy" usage.

3) rpmsg integration. The SOF IPC will use rpmsg virtio transport
between host and guests.

This series does not mandate a DSP IPC standard, since this may differ
between DSP vendors, but it will use OASIS standards for virtio-snd,
DMA buffers and rpmsg.

I would say that parts of the "SOF protocol" may be useful for other
vendors in the DAPM/topology areas where users want to connect guest
topologies to host topologies (connected internally with DAPM).

Thanks

Liam