[PATCH v2 3/9] ASoC: audio-graph: Identify 'no_pcm' DAI links for DPCM

[Kuninori Morimoto]

Hi again

> 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 at nvidia.com>
> ---
(snip)
> +static bool soc_component_is_pcm(struct snd_soc_dai_link_component *dlc)
> +{
> +	struct snd_soc_dai *dai = snd_soc_find_dai(dlc);
> +
> +	if (dai && (dai->component->driver->pcm_construct ||
> +		    dai->driver->pcm_new))
> +		return true;
> +
> +	return false;
> +}

This snd_soc_find_dai() will indicate WARNING
if .config has CONFIG_LOCKDEP for me.

Maybe implement it at soc-core.c with client_mutex lock
is needed.

Thank you for your help !!

Best regards
---
Kuninori Morimoto