diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index cacfbc05786a..870ac583bea2 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -3046,17 +3046,6 @@ static bool is_ctl_used(struct hda_codec *codec, unsigned int val, int type)
 	return false;
 }
 
-static void clear_vol_marks(struct hda_codec *codec)
-{
-	struct alc_spec *spec = codec->spec;
-	int i;
-
-	for (i = 0; i < spec->out_path.used; i++) {
-		struct nid_path *path = snd_array_elem(&spec->out_path, i);
-		path->ctls[0] = path->ctls[1] = 0;
-	}
-}
-
 /* badness definition */
 enum {
 	/* No primary DAC is found for the main output */
@@ -3121,8 +3110,15 @@ static struct nid_path *get_out_path(struct hda_codec *codec, hda_nid_t pin,
 	return NULL;
 }
 
-static int eval_shared_vol_badness(struct hda_codec *codec, hda_nid_t pin,
-				   hda_nid_t dac)
+/* look for widgets in the path between the given NIDs appropriate for
+ * volume and mute controls, and assign the values to ctls[].
+ *
+ * When no appropriate widget is found in the path, the badness value
+ * is incremented depending on the situation.  The function returns the
+ * total badness for both volume and mute controls.
+ */
+static int assign_out_path_ctls(struct hda_codec *codec, hda_nid_t pin,
+				hda_nid_t dac)
 {
 	struct nid_path *path = get_out_path(codec, pin, dac);
 	hda_nid_t nid;
@@ -3143,7 +3139,8 @@ static int eval_shared_vol_badness(struct hda_codec *codec, hda_nid_t pin,
 	nid = alc_look_for_out_mute_nid(codec, path);
 	if (nid) {
 		unsigned int wid_type = get_wcaps_type(get_wcaps(codec, nid));
-		if (wid_type == AC_WID_PIN || wid_type == AC_WID_AUD_OUT)
+		if (wid_type == AC_WID_PIN || wid_type == AC_WID_AUD_OUT ||
+		    nid_has_mute(codec, nid, HDA_OUTPUT))
 			val = HDA_COMPOSE_AMP_VAL(nid, 3, 0, HDA_OUTPUT);
 		else
 			val = HDA_COMPOSE_AMP_VAL(nid, 3, 0, HDA_INPUT);
@@ -3237,7 +3234,7 @@ static int alc_auto_fill_dacs(struct hda_codec *codec, int num_outs,
 		if (!add_new_out_path(codec, pin, dac))
 			dac = dacs[i] = 0;
 		if (dac)
-			badness += eval_shared_vol_badness(codec, pin, dac);
+			badness += assign_out_path_ctls(codec, pin, dac);
 	}
 
 	return badness;
@@ -3533,36 +3530,52 @@ static int alc_auto_fill_dac_nids(struct hda_codec *codec)
 			spec->vmaster_nid = alc_look_for_out_vol_nid(codec, path);
 	}
 
-	/* clear the bitmap flags for creating controls */
-	clear_vol_marks(codec);
 	kfree(best_cfg);
 	return 0;
 }
 
+/* replace the channels in the composed amp value with the given number */
+static unsigned int amp_val_replace_channels(unsigned int val, unsigned int chs)
+{
+	val &= ~(0x3U << 16);
+	val |= chs << 16;
+	return val;
+}
+
 static int alc_auto_add_vol_ctl(struct hda_codec *codec,
 				const char *pfx, int cidx,
-				hda_nid_t nid, unsigned int chs,
+				unsigned int chs,
 				struct nid_path *path)
 {
 	unsigned int val;
-	if (!nid || !path)
+	if (!path)
 		return 0;
-	val = HDA_COMPOSE_AMP_VAL(nid, chs, 0, HDA_OUTPUT);
-	if (is_ctl_used(codec, val, NID_PATH_VOL_CTL) && chs != 2) /* exclude LFE */
+	val = path->ctls[NID_PATH_VOL_CTL];
+	if (!val)
 		return 0;
-	path->ctls[NID_PATH_VOL_CTL] = val;
-	return __add_pb_vol_ctrl(codec->spec, ALC_CTL_WIDGET_VOL, pfx, cidx,
-				 val);
+	val = amp_val_replace_channels(val, chs);
+	return __add_pb_vol_ctrl(codec->spec, ALC_CTL_WIDGET_VOL, pfx, cidx, val);
+}
+
+/* return the channel bits suitable for the given path->ctls[] */
+static int get_default_ch_nums(struct hda_codec *codec, struct nid_path *path,
+			       int type)
+{
+	int chs = 1; /* mono (left only) */
+	if (path) {
+		hda_nid_t nid = get_amp_nid_(path->ctls[type]);
+		if (nid && (get_wcaps(codec, nid) & AC_WCAP_STEREO))
+			chs = 3; /* stereo */
+	}
+	return chs;
 }
 
 static int alc_auto_add_stereo_vol(struct hda_codec *codec,
 				   const char *pfx, int cidx,
-				   hda_nid_t nid, struct nid_path *path)
+				   struct nid_path *path)
 {
-	int chs = 1;
-	if (get_wcaps(codec, nid) & AC_WCAP_STEREO)
-		chs = 3;
-	return alc_auto_add_vol_ctl(codec, pfx, cidx, nid, chs, path);
+	int chs = get_default_ch_nums(codec, path, NID_PATH_VOL_CTL);
+	return alc_auto_add_vol_ctl(codec, pfx, cidx, chs, path);
 }
 
 /* create a mute-switch for the given mixer widget;
@@ -3570,39 +3583,33 @@ static int alc_auto_add_stereo_vol(struct hda_codec *codec,
  */
 static int alc_auto_add_sw_ctl(struct hda_codec *codec,
 			       const char *pfx, int cidx,
-			       hda_nid_t nid, unsigned int chs,
+			       unsigned int chs,
 			       struct nid_path *path)
 {
-	int wid_type;
-	int type;
-	unsigned long val;
-	if (!nid || !path)
+	unsigned int val;
+	int type = ALC_CTL_WIDGET_MUTE;
+
+	if (!path)
 		return 0;
-	wid_type = get_wcaps_type(get_wcaps(codec, nid));
-	if (wid_type == AC_WID_PIN || wid_type == AC_WID_AUD_OUT) {
-		type = ALC_CTL_WIDGET_MUTE;
-		val = HDA_COMPOSE_AMP_VAL(nid, chs, 0, HDA_OUTPUT);
-	} else if (snd_hda_get_num_conns(codec, nid) == 1) {
-		type = ALC_CTL_WIDGET_MUTE;
-		val = HDA_COMPOSE_AMP_VAL(nid, chs, 0, HDA_INPUT);
-	} else {
-		type = ALC_CTL_BIND_MUTE;
-		val = HDA_COMPOSE_AMP_VAL(nid, chs, 2, HDA_INPUT);
+	val = path->ctls[NID_PATH_MUTE_CTL];
+	if (!val)
+		return 0;
+	val = amp_val_replace_channels(val, chs);
+	if (get_amp_direction_(val) == HDA_INPUT) {
+		hda_nid_t nid = get_amp_nid_(val);
+		if (snd_hda_get_num_conns(codec, nid) > 1) {
+			type = ALC_CTL_BIND_MUTE;
+			val |= 2 << 19; /* FIXME: fixed two widgets, so far */
+		}
 	}
-	if (is_ctl_used(codec, val, NID_PATH_MUTE_CTL) && chs != 2) /* exclude LFE */
-		return 0;
-	path->ctls[NID_PATH_MUTE_CTL] = val;
 	return __add_pb_sw_ctrl(codec->spec, type, pfx, cidx, val);
 }
 
 static int alc_auto_add_stereo_sw(struct hda_codec *codec, const char *pfx,
-				  int cidx, hda_nid_t nid,
-				  struct nid_path *path)
+				  int cidx, struct nid_path *path)
 {
-	int chs = 1;
-	if (get_wcaps(codec, nid) & AC_WCAP_STEREO)
-		chs = 3;
-	return alc_auto_add_sw_ctl(codec, pfx, cidx, nid, chs, path);
+	int chs = get_default_ch_nums(codec, path, NID_PATH_MUTE_CTL);
+	return alc_auto_add_sw_ctl(codec, pfx, cidx, chs, path);
 }
 
 static hda_nid_t alc_look_for_out_mute_nid(struct hda_codec *codec,
@@ -3647,7 +3654,6 @@ static int alc_auto_create_multi_out_ctls(struct hda_codec *codec,
 		const char *name;
 		int index;
 		hda_nid_t dac, pin;
-		hda_nid_t sw, vol;
 		struct nid_path *path;
 
 		dac = spec->multiout.dac_nids[i];
@@ -3665,33 +3671,25 @@ static int alc_auto_create_multi_out_ctls(struct hda_codec *codec,
 		path = get_out_path(codec, pin, dac);
 		if (!path)
 			continue;
-		sw = alc_look_for_out_mute_nid(codec, path);
-		vol = alc_look_for_out_vol_nid(codec, path);
 		if (!name || !strcmp(name, "CLFE")) {
 			/* Center/LFE */
-			err = alc_auto_add_vol_ctl(codec, "Center", 0, vol, 1,
-						   path);
+			err = alc_auto_add_vol_ctl(codec, "Center", 0, 1, path);
 			if (err < 0)
 				return err;
-			err = alc_auto_add_vol_ctl(codec, "LFE", 0, vol, 2,
-						   path);
+			err = alc_auto_add_vol_ctl(codec, "LFE", 0, 2, path);
 			if (err < 0)
 				return err;
-			err = alc_auto_add_sw_ctl(codec, "Center", 0, sw, 1,
-						  path);
+			err = alc_auto_add_sw_ctl(codec, "Center", 0, 1, path);
 			if (err < 0)
 				return err;
-			err = alc_auto_add_sw_ctl(codec, "LFE", 0, sw, 2,
-						  path);
+			err = alc_auto_add_sw_ctl(codec, "LFE", 0, 2, path);
 			if (err < 0)
 				return err;
 		} else {
-			err = alc_auto_add_stereo_vol(codec, name, index, vol,
-						      path);
+			err = alc_auto_add_stereo_vol(codec, name, index, path);
 			if (err < 0)
 				return err;
-			err = alc_auto_add_stereo_sw(codec, name, index, sw,
-						     path);
+			err = alc_auto_add_stereo_sw(codec, name, index, path);
 			if (err < 0)
 				return err;
 		}
@@ -3703,34 +3701,19 @@ static int alc_auto_create_extra_out(struct hda_codec *codec, hda_nid_t pin,
 				     hda_nid_t dac, const char *pfx,
 				     int cidx)
 {
-	struct alc_spec *spec = codec->spec;
 	struct nid_path *path;
-	hda_nid_t sw, vol;
 	int err;
 
 	path = get_out_path(codec, pin, dac);
 	if (!path)
 		return 0;
-
-	if (!dac) {
-		unsigned int val;
-		/* the corresponding DAC is already occupied */
-		if (!(get_wcaps(codec, pin) & AC_WCAP_OUT_AMP))
-			return 0; /* no way */
-		/* create a switch only */
-		val = HDA_COMPOSE_AMP_VAL(pin, 3, 0, HDA_OUTPUT);
-		if (is_ctl_used(codec, val, NID_PATH_MUTE_CTL))
-			return 0; /* already created */
-		path->ctls[NID_PATH_MUTE_CTL] = val;
-		return __add_pb_sw_ctrl(spec, ALC_CTL_WIDGET_MUTE, pfx, cidx, val);
+	/* bind volume control will be created in the case of dac = 0 */
+	if (dac) {
+		err = alc_auto_add_stereo_vol(codec, pfx, cidx, path);
+		if (err < 0)
+			return err;
 	}
-
-	sw = alc_look_for_out_mute_nid(codec, path);
-	vol = alc_look_for_out_vol_nid(codec, path);
-	err = alc_auto_add_stereo_vol(codec, pfx, cidx, vol, path);
-	if (err < 0)
-		return err;
-	err = alc_auto_add_stereo_sw(codec, pfx, cidx, sw, path);
+	err = alc_auto_add_stereo_sw(codec, pfx, cidx, path);
 	if (err < 0)
 		return err;
 	return 0;
@@ -4051,7 +4034,12 @@ static int alc_auto_fill_multi_ios(struct hda_codec *codec,
 		return badness;
 	}
 
-	return 0;
+	/* assign volume and mute controls */
+	for (i = old_pins; i < spec->multi_ios; i++)
+		badness += assign_out_path_ctls(codec, spec->multi_io[i].pin,
+						spec->multi_io[i].dac);
+
+	return badness;
 }
 
 static int alc_auto_ch_mode_info(struct snd_kcontrol *kcontrol,