[Sound-open-firmware] about SOF 1.2 topology support

[Ranjani Sridharan]

On Mon, 2018-05-21 at 11:50 +0100, Liam Girdwood wrote:
> On Mon, 2018-05-21 at 18:27 +0800, Keyon Jie wrote:
> > Hi all,
> > 
> > I am collecting the 1.2 topology support gap and try to figure out
> > the 
> > priority and workload about that, and what I can imagine now are:
> > 
> > 1. Multiple BEs(SSPs) support;
> >      This may need add BE definition for SOF from tplg file.
> 
> 1.5 remove DMAC ID and DMAC channel from topology data. 

This is also in my task list for now. 

> 
> > 
> > 2. Reference tplg m4 for different platforms, including 
> > byt/cht/bdw/hsw/apl/cnl.
> >      This may need enable/verify types of pipeline(e.g. src,
> > media, 
> > low-latency) can works separately and stably.
> > 
> > 3. Refine host component buffer size, from pipeline format to pcm 
> > capability max, and use buffer_set_size in params() for each 
> > playback/capture.
> >      This means we can support different input formats(in the
> > capability 
> > list) with a single tplg file.
> > 
> > 4. Dynamic/hostless pipeline support.
> >      We have requirement to switching PCM(FEs) to different BEs at 
> > runtime, and also host-less(e.g. tone may already support. 
> > SSP2->SRC->SSP4, ...). we can add kcontrols to control those host-
> > less 
> > pipeline.
> > 5. Add a kcontrol for each SSP BE to switch loopback on/off, for
> > test 
> > purpose.

I'm not sure there's support for adding kcontrols to BE link widgets in
alsa topology atm. You might want to check that.  

> > ...
> > 
> > I will work on #5, then #1, then #2. I think Yan is working on
> > something 
> > related with #3, and #4 may have dependency to #1.
> 
> Ranjani is looking at #1 iirc.

Yes, I'm looking at this, Keyon. I am currently adding support for DMIC
in topology and it could take a look at multiple BE's while I am at it.

> 
> > 
> > Any comment about these are welcomed.
> 
> 
> Liam
> > 
> > Thanks,
> > ~Keyon
> > 
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