Hi Sameer > PCM devices are created for FE dai links with 'no-pcm' flag as '0'. > Such DAI links have CPU component which implement either pcm_construct() > or pcm_new() at component or dai level respectively. 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 component involved in such links. > > Signed-off-by: Sameer Pujar <spujar@xxxxxxxxxx> > --- (snip) > @@ -259,6 +270,16 @@ static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv, > if (ret < 0) > goto out_put_node; > > + /* > + * In BE<->BE connections it is not required to create > + * PCM devices at CPU end of the dai link and thus 'no_pcm' > + * flag needs to be set. It is useful when there are many > + * BE components and some of these have to be connected to > + * form a valid audio path. > + */ > + if (!soc_component_is_pcm(cpus)) > + dai_link->no_pcm = 1; > + For safety, I want to judge with data->component_chaining. if (data->component_chaining && !soc_component_is_pcm(cpus)) dai_link->no_pcm = 1; Thank you for your help !! Best regards --- Kuninori Morimoto
