On Wed, Oct 9, 2019 at 3:18 AM Kuninori Morimoto
<kuninori.morimoto.gx@xxxxxxxxxxx> wrote:
>
>
> Hi Daniel
>
> > > * ex1)
> > > * CPU0 --- Codec0
> > > * CPU1 --- Codec1
> > > * CPU2 -----/
> > > * CPU3 --- Codec2
> > > *
> > > * => 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec
> > > * => 7 DAIs = 4xCPU + 3xCodec
> > > * => 1 ccnf = 1xdummy-Codec
> > >
> > >
> > > So, I don't understand exactly how did you get the formula for links. AFAICT
> > > there should be 3 x CPU-Codec + 1 x CPU-dummy.
>
> CPU1/CPU2 and Codec1 are using DPCM.
> Thus, it is...
>
> 2xCPU-Codec:
> CPU0 - Codec0
> CPU3 - Codec2
>
> 2xCPU-dummy:
> CPU1 - dummy
> CPU2 - dummy
>
> 1xdummy-Codec:
> dummy - Codec1
One more question: How would you describe in the DTS this scenario. Is
this, correct?
machine_drv {
compatible = "simple-card";
simple-audio-card,dai-link@0 {
cpu {
sound-dai=<&cpu0>;
}
codec {
sound-dai=<&Codec0>;
}
}
simple-audio-card,dai-link@1 {
cpu {
sound-dai=<&cpu3>;
}
codec {
sound-dai=<&Codec2>;
}
}
simple-audio-card,dai-link@2 {
cpu {
sound-dai=<&cpu1>;
}
}
simple-audio-card,dai-link@3 {
cpu {
sound-dai=<&cpu2>;
}
}
simple-audio-card,dai-link@4{
cpu {
sound-dai=<&Codec1>;
}
}
};
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