meta-st-stm32mp/recipes-bsp/alsa/alsa-state-stm32mp1/asound-stm32mp15yx-dk.conf

pcm.!playback_codec {
    type hw
    card STM32MP1DK
    device 0
}

pcm.!record_codec {
    type hw
    card STM32MP1DK
    device 1
}

pcm.!playback_hdmi {
    type hw
    card STM32MP1DK
    device 2
}