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@nvidia.com
(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