ASoC: dapm: Add unlocked version of snd_soc_dapm_sync
We will often call sync after several functions that require the DAPM
mutex to be held. Rather than release and immediately relock the mutex
provide an unlocked function for this situation.
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 48a4eeb..4200f96 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -2342,6 +2342,30 @@
}
/**
+ * snd_soc_dapm_sync_unlocked - scan and power dapm paths
+ * @dapm: DAPM context
+ *
+ * Walks all dapm audio paths and powers widgets according to their
+ * stream or path usage.
+ *
+ * Requires external locking.
+ *
+ * Returns 0 for success.
+ */
+int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
+{
+ /*
+ * Suppress early reports (eg, jacks syncing their state) to avoid
+ * silly DAPM runs during card startup.
+ */
+ if (!dapm->card || !dapm->card->instantiated)
+ return 0;
+
+ return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
+
+/**
* snd_soc_dapm_sync - scan and power dapm paths
* @dapm: DAPM context
*
@@ -2354,15 +2378,8 @@
{
int ret;
- /*
- * Suppress early reports (eg, jacks syncing their state) to avoid
- * silly DAPM runs during card startup.
- */
- if (!dapm->card || !dapm->card->instantiated)
- return 0;
-
mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
- ret = dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
+ ret = snd_soc_dapm_sync_unlocked(dapm);
mutex_unlock(&dapm->card->dapm_mutex);
return ret;
}