Re: [alsa-devel] Counting links in simple-card

9 Oct 2019


      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
...
Also, I wonder how can i use simple-card to create just a backend link
CPU-dummy + Codec :).
Is this supported?
Do you mean CPU-dummy + dummy-Codec ?
But anyway, simple-card/audio-graph DPCM support is very limited.
Unfortunately it doesn't have flexibility...
Thank you for your help !!
Best regards
---
Kuninori Morimoto