ASoC: ops: Factor out common code from info callbacks

snd_soc_info_volsw() and snd_soc_info_volsw_sx() do very similar
things, and have a lot of code in common. Already this is causing
some issues as the detection of volume controls has been fixed
in the normal callback but not the sx callback. Factor out a new
helper containing the common code and leave the function specific
bits behind in each callback.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://patch.msgid.link/20250318171459.3203730-12-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: charleskeepax

sound/soc/soc-ops.c

@@ -168,6 +168,30 @@ static int soc_mixer_sx_mask(struct soc_mixer_control *mc)
 	return GENMASK(fls(mc->min + mc->max) - 2, 0);
 }
 
+static int soc_info_volsw(struct snd_kcontrol *kcontrol,
+			  struct snd_ctl_elem_info *uinfo,
+			  struct soc_mixer_control *mc, int max)
+{
+	if (mc->platform_max && mc->platform_max < max)
+		max = mc->platform_max;
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+
+	if (max == 1) {
+		/* Even two value controls ending in Volume should be integer */
+		const char *vol_string = strstr(kcontrol->id.name, " Volume");
+
+		if (!vol_string || strcmp(vol_string, " Volume"))
+			uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+	}
+
+	uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = max;
+
+	return 0;
+}
+
 /**
  * snd_soc_info_volsw - single mixer info callback with range.
  * @kcontrol: mixer control
@@ -183,29 +207,8 @@ int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
 {
 	struct soc_mixer_control *mc =
 		(struct soc_mixer_control *)kcontrol->private_value;
-	const char *vol_string = NULL;
-	int max;
-
-	max = uinfo->value.integer.max = mc->max - mc->min;
-	if (mc->platform_max && mc->platform_max < max)
-		max = mc->platform_max;
-
-	if (max == 1) {
-		/* Even two value controls ending in Volume should always be integer */
-		vol_string = strstr(kcontrol->id.name, " Volume");
-		if (vol_string && !strcmp(vol_string, " Volume"))
-			uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
-		else
-			uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
-	} else {
-		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
-	}
 
-	uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
-	uinfo->value.integer.min = 0;
-	uinfo->value.integer.max = max;
-
-	return 0;
+	return soc_info_volsw(kcontrol, uinfo, mc, mc->max - mc->min);
 }
 EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
 
@@ -227,23 +230,8 @@ int snd_soc_info_volsw_sx(struct snd_kcontrol *kcontrol,
 {
 	struct soc_mixer_control *mc =
 		(struct soc_mixer_control *)kcontrol->private_value;
-	int max;
 
-	if (mc->platform_max)
-		max = mc->platform_max;
-	else
-		max = mc->max;
-
-	if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
-		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
-	else
-		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
-
-	uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
-	uinfo->value.integer.min = 0;
-	uinfo->value.integer.max = max;
-
-	return 0;
+	return soc_info_volsw(kcontrol, uinfo, mc, mc->max);
 }
 EXPORT_SYMBOL_GPL(snd_soc_info_volsw_sx);