Hi Sameer
PCM devices are created for dai links with 'no-pcm' flag as '0'. Such DAI links have CPU component which implement pcm_construct() and pcm_destruct() callbacks. Based on this, current patch exposes a helper function to identify such components and populate 'no_pcm' flag for DPCM DAI link.
This helps to have BE<->BE component links where PCM devices need not be created for CPU components involved in the links.
Signed-off-by: Sameer Pujar <spujar@nvidia.com> --- (snip) +bool soc_component_is_pcm(struct snd_soc_dai_link_component *dlc) +{ + struct snd_soc_component *component; + struct snd_soc_dai *dai; + + for_each_component(component) { + if (!component->driver) + continue; + + for_each_component_dais(component, dai) { + if (!dai->name || !dlc->dai_name) + continue; + + if (strcmp(dai->name, dlc->dai_name)) + continue; + + if (component->driver->pcm_construct) + return true; + } + } + + return false; +}
At least my CPU driver doesn't use component:pcm_construct but is using DAI:pcm_new for some reasons. I'm not sure checking DAI:pcm here is enough, or not... Thank you for your help !! Best regards --- Kuninori Morimoto