I am using imx6 board with fsl-yocto-bsp with kernel version 4.1.44 and alsa-lib 1.1.4 . All software in our board uses the alsa plugin asym for simultaneous record/playback. the asound.conf is the default one as in meta-freescale/asound.conf at rocko · Freescale/meta-freescale · GitHub [rocko branch]. codec is from microsemi zl38040.
issues is, sometimes applications are not able to access the audio. below error is coming. attaching asound.conf also
ALSA lib ../../../alsa-lib-220.127.116.11/src/pcm/pcm_dmix.c:1177:(snd_pcm_dmix_open) unable to initialize sum ring buffer
alsa: could not open auplay device 'plug:asymed' (Invalid argument)
Please suggest any way for debugging.