[Adding Mark Brown - ASoC maintainer] On 7/4/23 14:17, Peter Suti wrote > Hi, > > I'm trying to create a sound card which has two codecs associated with > one DAI. One codec is responsible for playback and the other one for > capture. I can see in soc-pcm.c that > __soc_pcm_hw_params() is checking if the stream is valid for the > current codec with > snd_soc_dai_stream_valid() and if it isn't it is not calling the > hw_params() callback. > But this check is not there in __soc_pcm_open() which calls > snd_soc_dai_startup() for every codec. Can someone shed some light on > this? Why is startup() called for codecs that don't support the > current stream? We have a similar issue but with the .trigger callback. We will send a patch when the merge window closes, see https://github.com/thesofproject/linux/pull/4434 You may need a similar test for the startup?
