diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 1627756e5c7d..a51160106df3 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -3653,14 +3653,18 @@ static int stac92xx_init(struct hda_codec *codec)
 	for (i = 0; i < AUTO_PIN_LAST; i++) {
 		hda_nid_t nid = cfg->input_pins[i];
 		if (nid) {
-			unsigned int pinctl = snd_hda_codec_read(codec, nid,
-				0, AC_VERB_GET_PIN_WIDGET_CONTROL, 0);
-			/* if PINCTL already set then skip */
-			if (pinctl & AC_PINCAP_IN)
-				continue;
-			pinctl = AC_PINCTL_IN_EN;
-			if (i == AUTO_PIN_MIC || i == AUTO_PIN_FRONT_MIC)
-				pinctl |= stac92xx_get_vref(codec, nid);
+			unsigned int pinctl;
+			if (i == AUTO_PIN_MIC || i == AUTO_PIN_FRONT_MIC) {
+				/* for mic pins, force to initialize */
+				pinctl = stac92xx_get_vref(codec, nid);
+			} else {
+				pinctl = snd_hda_codec_read(codec, nid, 0,
+					AC_VERB_GET_PIN_WIDGET_CONTROL, 0);
+				/* if PINCTL already set then skip */
+				if (pinctl & AC_PINCTL_IN_EN)
+					continue;
+			}
+			pinctl |= AC_PINCTL_IN_EN;
 			stac92xx_auto_set_pinctl(codec, nid, pinctl);
 		}
 	}