[Sound-open-firmware] Status of ssp driver in Qemu

[Liam Girdwood]

On Wed, 2019-12-18 at 21:24 +0000, Daniel Baluta wrote:
> Hi Liam,
> 
> I wonder what is the status of the SSP driver in Qemu. Particularly,
> I'm interested
> about ssp->tx.fd / ssp->rx.fd.
> 
> It looks like these files are only opened and closed but never
> written to / read from. 
> 
> Can you explain what is your idea on emulating the DAIs on Qemu?

The intention is to be able to perform file IO for SSP IO. i.e. SSP
playback would write to a file and SSP capture would read from a file.
This worked in a early version prior to upstreaming, but it was a hack
that needed cleaning up (still TODO).

Using file IO for DAI emulation means we can script and more easily
validate input/output data from any processing.

Liam

> 
> thanks,
> Daniel.