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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>
This commit is contained in:
Mengdong Lin 2015-12-02 14:11:32 +08:00 committed by Mark Brown
parent f8f80361d0
commit d6f220ea13
2 changed files with 17 additions and 0 deletions
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5
include/sound/soc.h
View File

@ -1104,6 +1104,11 @@ struct snd_soc_card {
struct snd_soc_dapm_context *dapm,
enum snd_soc_bias_level level);
int (*add_dai_link)(struct snd_soc_card *,
struct snd_soc_dai_link *link);
void (*remove_dai_link)(struct snd_soc_card *,
struct snd_soc_dai_link *link);
long pmdown_time;
/* CPU <--> Codec DAI links */

12
sound/soc/soc-core.c
View File

@ -1260,6 +1260,12 @@ int snd_soc_add_dai_link(struct snd_soc_card *card,
}
lockdep_assert_held(&client_mutex);
/* Notify the machine driver for extra initialization
* on the link created by topology.
*/
if (dai_link->dobj.type && card->add_dai_link)
card->add_dai_link(card, dai_link);
list_add_tail(&dai_link->list, &card->dai_link_list);
card->num_dai_links++;
@ -1290,6 +1296,12 @@ void snd_soc_remove_dai_link(struct snd_soc_card *card,
}
lockdep_assert_held(&client_mutex);
/* Notify the machine driver for extra destruction
* on the link created by topology.
*/
if (dai_link->dobj.type && card->remove_dai_link)
card->remove_dai_link(card, dai_link);
list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
if (link == dai_link) {
list_del(&link->list);