[alsa-devel] [PATCH 0/2] Graph fixes for using multiple endpoints per port

Kuninori Morimoto kuninori.morimoto.gx at renesas.com
Wed Dec 12 03:11:10 CET 2018


Hi Tony

> > 	https://patchwork.kernel.org/patch/10712877/
> 
> Hmm, so do you have multiple separate ports at the "&sound" node
> hardware? If so then yeah multiple ports make sense.
>
> But if you only a single physical (I2S?) port at the
> "&sound" node hardware, then IMO you should only have one
> port and multiple endpoints there according to the graph.txt
> binding doc.
> 
> In my McBSP case there is only a single physical I2S port
> that can be TDM split into timeslots.

Mine has 4 DAIs. Each DAI can output 2ch.
These will be merged and wil be 8ch TDM and goes to Codec.
But hmm.. it is 4 DAIs, but 1 "physical" interface...

So, your patch seems correct, but will breaks DPCM...
I will confirm it.

Best regards
---
Kuninori Morimoto


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