On Fri, Aug 21, 2020 at 7:16 AM Kuninori Morimoto kuninori.morimoto.gx@renesas.com wrote:
Hi Mark Cc Pierre-Louis, Sameer
Current audio-graph-card driver has DPCM support, but it is limited (= Mix/Mux/TDM-split/rate-convert/channel-convert). It was expanded forcibly expanded.
Because of it, the connection judgement for normal vs DPCM is tricky. I know Pierre-Louis want to use it for SOF, but something is missing, thus, can't use (?).
Hi Morimoto-san,
Thanks for having a look at this. I also tried to use generic machine driver (simple-card) with SOF but I had some trouble creating desired DPCM links.
Main limitation of simple-card is that there is no direct way of specifying DPCM links.
I had an attempt to introduce a more flexible approach for that here: https://lkml.org/lkml/2019/10/13/123
but obviously we can do better than that.
For now, I'm using only normal links with simple-audio card and it works fine for me with SOF, but in the future I think we might need to expand that.