18 Aug
2020
18 Aug
'20
8:23 a.m.
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@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