diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index e4e7d43f911e..7eb359a030de 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -263,6 +263,7 @@ struct sigmatel_spec {
 
 	struct sigmatel_mic_route ext_mic;
 	struct sigmatel_mic_route int_mic;
+	struct sigmatel_mic_route dock_mic;
 
 	const char **spdif_labels;
 
@@ -3488,7 +3489,7 @@ static int stac92xx_auto_create_dmic_input_ctls(struct hda_codec *codec,
 }
 
 static int check_mic_pin(struct hda_codec *codec, hda_nid_t nid,
-			 hda_nid_t *fixed, hda_nid_t *ext)
+			 hda_nid_t *fixed, hda_nid_t *ext, hda_nid_t *dock)
 {
 	unsigned int cfg;
 
@@ -3496,15 +3497,22 @@ static int check_mic_pin(struct hda_codec *codec, hda_nid_t nid,
 		return 0;
 	cfg = snd_hda_codec_get_pincfg(codec, nid);
 	switch (get_defcfg_connect(cfg)) {
+	case AC_JACK_PORT_BOTH:
 	case AC_JACK_PORT_FIXED:
 		if (*fixed)
 			return 1; /* already occupied */
 		*fixed = nid;
 		break;
 	case AC_JACK_PORT_COMPLEX:
-		if (*ext)
-			return 1; /* already occupied */
-		*ext = nid;
+		if ((get_defcfg_location(cfg) & 0xF0) == AC_JACK_LOC_SEPARATE) {
+			if (*dock)
+				return 1; /* already occupied */
+			*dock = nid;
+		} else {
+			if (*ext)
+				return 1; /* already occupied */
+			*ext = nid;
+		}
 		break;
 	}
 	return 0;
@@ -3519,6 +3527,8 @@ static int set_mic_route(struct hda_codec *codec,
 	int i;
 
 	mic->pin = pin;
+	if (pin == 0)
+		return 0;
 	for (i = 0; i < cfg->num_inputs; i++) {
 		if (pin == cfg->inputs[i].pin)
 			break;
@@ -3554,26 +3564,29 @@ static int stac_check_auto_mic(struct hda_codec *codec)
 {
 	struct sigmatel_spec *spec = codec->spec;
 	struct auto_pin_cfg *cfg = &spec->autocfg;
-	hda_nid_t fixed, ext;
+	hda_nid_t fixed, ext, dock;
 	int i;
 
 	for (i = 0; i < cfg->num_inputs; i++) {
 		if (cfg->inputs[i].type >= AUTO_PIN_LINE_IN)
 			return 0; /* must be exclusively mics */
 	}
-	fixed = ext = 0;
+	fixed = ext = dock = 0;
 	for (i = 0; i < cfg->num_inputs; i++)
-		if (check_mic_pin(codec, cfg->inputs[i].pin, &fixed, &ext))
+		if (check_mic_pin(codec, cfg->inputs[i].pin,
+		    &fixed, &ext, &dock))
 			return 0;
 	for (i = 0; i < spec->num_dmics; i++)
-		if (check_mic_pin(codec, spec->dmic_nids[i], &fixed, &ext))
+		if (check_mic_pin(codec, spec->dmic_nids[i],
+		    &fixed, &ext, &dock))
 			return 0;
-	if (!fixed || !ext)
-		return 0;
+	if (!fixed && !ext && !dock)
+		return 0; /* no input to switch */
 	if (!(get_wcaps(codec, ext) & AC_WCAP_UNSOL_CAP))
 		return 0; /* no unsol support */
 	if (set_mic_route(codec, &spec->ext_mic, ext) ||
-	    set_mic_route(codec, &spec->int_mic, fixed))
+	    set_mic_route(codec, &spec->int_mic, fixed) ||
+	    set_mic_route(codec, &spec->dock_mic, dock))
 		return 0; /* something is wrong */
 	return 1;
 }
@@ -4281,6 +4294,9 @@ static int stac92xx_init(struct hda_codec *codec)
 					  AC_VERB_SET_CONNECT_SEL, 0);
 		if (enable_pin_detect(codec, spec->ext_mic.pin, STAC_MIC_EVENT))
 			stac_issue_unsol_event(codec, spec->ext_mic.pin);
+		if (enable_pin_detect(codec, spec->dock_mic.pin,
+		    STAC_MIC_EVENT))
+			stac_issue_unsol_event(codec, spec->dock_mic.pin);
 	}
 	for (i = 0; i < cfg->num_inputs; i++) {
 		hda_nid_t nid = cfg->inputs[i].pin;
@@ -4698,6 +4714,8 @@ static void stac92xx_mic_detect(struct hda_codec *codec)
 
 	if (get_pin_presence(codec, spec->ext_mic.pin))
 		mic = &spec->ext_mic;
+	else if (get_pin_presence(codec, spec->dock_mic.pin))
+		mic = &spec->dock_mic;
 	else
 		mic = &spec->int_mic;
 	if (mic->dmux_idx >= 0)