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How to Enable and Troubleshoot Audio Functionality on STM32MP175F Using Buildroot?

I am building an OS for my STM32MP175F dk2 board using Buildroot. The audio sound card is recognized in U-Boot boot messages and alsamixer, but /proc/asound/cards does not list the sound card, and I cannot play or record audio. I intend to use headphones as both input (microphone) and output (speaker) for voice calls between boards.

What configurations and packages should I enable in Buildroot to ensure audio functionality? How can I verify and troubleshoot the audio setup to ensure proper operation during voice calls?

  1. melta101#0000

    havnt played with alsa directly much, mostly worked with on top of pulseaudio

  2. R1Tap#0000

    The issue is with dts file system, i need to update dts file system.
    I have all the drivers and also the correct audiocodec driver
    i got pulseaudio

  3. melta101#0000

    i suppose you have fixed it?

  4. R1Tap#0000

    It says I don’t have soundcard also when I proc/snd
    Also alsamixer will show the sound card
    And even the uboot boot messages will show the sound card
    And I can’t see it anywhere

  5. melta101#0000

    if also is showing, i dont see a problem,
    what are you trying to acheive?

  6. R1Tap#0000

    It says no sound card everywhere

  7. R1Tap#0000

    i want headphone access with the board

  8. R1Tap#0000

    my project is to make a call between two boards

  9. melta101#0000

    how about using USB for audio?

  10. melta101#0000

    ik it’s not the way you want, just asking in case

  11. R1Tap#0000

    I dont have headphones with USB connector

  12. R1Tap#0000

    if its there a way then it should work with aux cable also

  13. melta101#0000

    the methods are different,
    USB has a class UAC2 which helps in decoding/xfer of audio to/from USB host
    but AUX comes from snd part-> cant say much as i havnt work on aux and embedded linux

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