ASoC: Define add/remove_dai_link ops for a soc card
A machine driver can register the two ops. When a DAI link is added or removed by a component's topology, the ASoC core can call the ops to notify the machine driver for extra intialization or destruction. E.g. topology can create FE DAI links from a cpu DAI component, and the machine driver may define an add_dai_link ops to set machine-specific .init ops for the DAI link. Signed-off-by: Mengdong Lin <mengdong.lin@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
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@ -1104,6 +1104,11 @@ struct snd_soc_card {
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struct snd_soc_dapm_context *dapm,
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enum snd_soc_bias_level level);
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int (*add_dai_link)(struct snd_soc_card *,
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struct snd_soc_dai_link *link);
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void (*remove_dai_link)(struct snd_soc_card *,
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struct snd_soc_dai_link *link);
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long pmdown_time;
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/* CPU <--> Codec DAI links */
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@ -1260,6 +1260,12 @@ int snd_soc_add_dai_link(struct snd_soc_card *card,
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}
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lockdep_assert_held(&client_mutex);
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/* Notify the machine driver for extra initialization
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* on the link created by topology.
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*/
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if (dai_link->dobj.type && card->add_dai_link)
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card->add_dai_link(card, dai_link);
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list_add_tail(&dai_link->list, &card->dai_link_list);
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card->num_dai_links++;
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@ -1290,6 +1296,12 @@ void snd_soc_remove_dai_link(struct snd_soc_card *card,
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}
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lockdep_assert_held(&client_mutex);
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/* Notify the machine driver for extra destruction
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* on the link created by topology.
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*/
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if (dai_link->dobj.type && card->remove_dai_link)
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card->remove_dai_link(card, dai_link);
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list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
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if (link == dai_link) {
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list_del(&link->list);
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