2 files changed, 32 insertions, 2 deletions

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 884e728b09d9..26ede14597da 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -86,7 +86,7 @@
         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | \
         SNDRV_CTL_ELEM_ACCESS_READWRITE, \
         .tlv.p  = (tlv_array),\
-        .info = snd_soc_info_volsw, \
+        .info = snd_soc_info_volsw_sx, \
         .get = snd_soc_get_volsw_sx,\
         .put = snd_soc_put_volsw_sx, \
         .private_value = (unsigned long)&(struct soc_mixer_control) \
@@ -156,7 +156,7 @@
         .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | \
         SNDRV_CTL_ELEM_ACCESS_READWRITE, \
         .tlv.p  = (tlv_array), \
-        .info = snd_soc_info_volsw, \
+        .info = snd_soc_info_volsw_sx, \
         .get = snd_soc_get_volsw_sx, \
         .put = snd_soc_put_volsw_sx, \
         .private_value = (unsigned long)&(struct soc_mixer_control) \
@@ -574,6 +574,8 @@ int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
         struct snd_ctl_elem_value *ucontrol);
 int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
         struct snd_ctl_elem_info *uinfo);
+int snd_soc_info_volsw_sx(struct snd_kcontrol *kcontrol,
+                          struct snd_ctl_elem_info *uinfo);
 #define snd_soc_info_bool_ext           snd_ctl_boolean_mono_info
 int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
         struct snd_ctl_elem_value *ucontrol);
diff --git a/sound/soc/soc-ops.c b/sound/soc/soc-ops.c
index 100d92b5b77e..05977ae1ff2a 100644
--- a/sound/soc/soc-ops.c
+++ b/sound/soc/soc-ops.c
@@ -207,6 +207,34 @@ int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
 
 /**
+ * snd_soc_info_volsw_sx - Mixer info callback for SX TLV controls
+ * @kcontrol: mixer control
+ * @uinfo: control element information
+ *
+ * Callback to provide information about a single mixer control, or a double
+ * mixer control that spans 2 registers of the SX TLV type. SX TLV controls
+ * have a range that represents both positive and negative values either side
+ * of zero but without a sign bit.
+ *
+ * Returns 0 for success.
+ */
+int snd_soc_info_volsw_sx(struct snd_kcontrol *kcontrol,
+                          struct snd_ctl_elem_info *uinfo)
+{
+        struct soc_mixer_control *mc =
+                (struct soc_mixer_control *)kcontrol->private_value;
+
+        snd_soc_info_volsw(kcontrol, uinfo);
+        /* Max represents the number of levels in an SX control not the
+         * maximum value, so add the minimum value back on
+         */
+        uinfo->value.integer.max += mc->min;
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_info_volsw_sx);
+
+/**
  * snd_soc_get_volsw - single mixer get callback
  * @kcontrol: mixer control
  * @ucontrol: control element information