ASoC: dapm: add snd_soc_dapm_put_enum_double_locked

Adds snd_soc_dapm_put_enum_double_locked() for those use cases if
dapm_mutex has already locked.
Signed-off-by: NTzung-Bi Shih <tzungbi@google.com>
Link: https://lore.kernel.org/r/20200117073814.82441-3-tzungbi@google.comSigned-off-by: NMark Brown <broonie@kernel.org>

include/sound/soc-dapm.h

@@ -392,6 +392,8 @@ int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_value *ucontrol);
 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_value *ucontrol);
+int snd_soc_dapm_put_enum_double_locked(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol);
 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_info *uinfo);
 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,

sound/soc/soc-dapm.c

@@ -3441,17 +3441,8 @@ int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
 }
 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
 
-/**
- * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
- * @kcontrol: mixer control
- * @ucontrol: control element information
- *
- * Callback to set the value of a dapm enumerated double mixer control.
- *
- * Returns 0 for success.
- */
-int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
-	struct snd_ctl_elem_value *ucontrol)
+static int __snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol, int locked)
 {
 	struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
 	struct snd_soc_card *card = dapm->card;
@@ -3474,7 +3465,9 @@ int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
 		mask |= e->mask << e->shift_r;
 	}
 
-	mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
+	if (!locked)
+		mutex_lock_nested(&card->dapm_mutex,
+				  SND_SOC_DAPM_CLASS_RUNTIME);
 
 	change = dapm_kcontrol_set_value(kcontrol, val);
 
@@ -3496,15 +3489,50 @@ int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
 		card->update = NULL;
 	}
 
-	mutex_unlock(&card->dapm_mutex);
+	if (!locked)
+		mutex_unlock(&card->dapm_mutex);
 
 	if (ret > 0)
 		soc_dpcm_runtime_update(card);
 
 	return change;
 }
+
+/**
+ * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
+ * @kcontrol: mixer control
+ * @ucontrol: control element information
+ *
+ * Callback to set the value of a dapm enumerated double mixer control.
+ *
+ * Returns 0 for success.
+ */
+int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	return __snd_soc_dapm_put_enum_double(kcontrol, ucontrol, 0);
+}
 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
 
+/**
+ * snd_soc_dapm_put_enum_double_locked - dapm enumerated double mixer set
+ * callback
+ * @kcontrol: mixer control
+ * @ucontrol: control element information
+ *
+ * Callback to set the value of a dapm enumerated double mixer control.
+ * Must acquire dapm_mutex before calling the function.
+ *
+ * Returns 0 for success.
+ */
+int snd_soc_dapm_put_enum_double_locked(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	dapm_assert_locked(snd_soc_dapm_kcontrol_dapm(kcontrol));
+	return __snd_soc_dapm_put_enum_double(kcontrol, ucontrol, 1);
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double_locked);
+
 /**
  * snd_soc_dapm_info_pin_switch - Info for a pin switch
  *