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Diffstat (limited to 'sound/soc/soc-jack.c')
-rw-r--r--sound/soc/soc-jack.c43
1 files changed, 40 insertions, 3 deletions
diff --git a/sound/soc/soc-jack.c b/sound/soc/soc-jack.c
index 3c07a94c2e30..29159e1781d0 100644
--- a/sound/soc/soc-jack.c
+++ b/sound/soc/soc-jack.c
@@ -37,6 +37,7 @@ int snd_soc_jack_new(struct snd_soc_card *card, const char *id, int type,
{
jack->card = card;
INIT_LIST_HEAD(&jack->pins);
+ BLOCKING_INIT_NOTIFIER_HEAD(&jack->notifier);
return snd_jack_new(card->codec->card, id, type, &jack->jack);
}
@@ -63,10 +64,9 @@ void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask)
int enable;
int oldstatus;
- if (!jack) {
- WARN_ON_ONCE(!jack);
+ if (!jack)
return;
- }
+
codec = jack->card->codec;
mutex_lock(&codec->mutex);
@@ -93,6 +93,9 @@ void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask)
snd_soc_dapm_disable_pin(codec, pin->pin);
}
+ /* Report before the DAPM sync to help users updating micbias status */
+ blocking_notifier_call_chain(&jack->notifier, status, NULL);
+
snd_soc_dapm_sync(codec);
snd_jack_report(jack->jack, status);
@@ -143,6 +146,40 @@ int snd_soc_jack_add_pins(struct snd_soc_jack *jack, int count,
}
EXPORT_SYMBOL_GPL(snd_soc_jack_add_pins);
+/**
+ * snd_soc_jack_notifier_register - Register a notifier for jack status
+ *
+ * @jack: ASoC jack
+ * @nb: Notifier block to register
+ *
+ * Register for notification of the current status of the jack. Note
+ * that it is not possible to report additional jack events in the
+ * callback from the notifier, this is intended to support
+ * applications such as enabling electrical detection only when a
+ * mechanical detection event has occurred.
+ */
+void snd_soc_jack_notifier_register(struct snd_soc_jack *jack,
+ struct notifier_block *nb)
+{
+ blocking_notifier_chain_register(&jack->notifier, nb);
+}
+EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_register);
+
+/**
+ * snd_soc_jack_notifier_unregister - Unregister a notifier for jack status
+ *
+ * @jack: ASoC jack
+ * @nb: Notifier block to unregister
+ *
+ * Stop notifying for status changes.
+ */
+void snd_soc_jack_notifier_unregister(struct snd_soc_jack *jack,
+ struct notifier_block *nb)
+{
+ blocking_notifier_chain_unregister(&jack->notifier, nb);
+}
+EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_unregister);
+
#ifdef CONFIG_GPIOLIB
/* gpio detect */
static void snd_soc_jack_gpio_detect(struct snd_soc_jack_gpio *gpio)