ALSA: hda - Fix docking output for IDT 92HD8xx codecs

This patch fixes docking output support for IDT 92HD81/83/88 family codecs.
Typically one of ports 0xE or 0xF is used for docking output, while only
port 0xF is common on all the three codec families.  We don't want the
pin to select the analog mixer here.
Signed-off-by: Charles Chin <Charles.Chin@idt.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_sigmatel.c

@@ -5291,7 +5291,6 @@ static int patch_stac92hd83xxx(struct hda_codec *codec)
 	hda_nid_t conn[STAC92HD83_DAC_COUNT + 1];
 	int err;
 	int num_dacs;
-	hda_nid_t nid;
 
 	spec  = kzalloc(sizeof(*spec), GFP_KERNEL);
 	if (spec == NULL)
@@ -5387,24 +5386,21 @@ again:
 		return err;
 	}
 
-	switch (spec->board_config) {
-	case STAC_DELL_S14:
-		nid = 0xf;
-		break;
-	default:
-		nid = 0xe;
-		break;
-	}
-
-	num_dacs = snd_hda_get_connections(codec, nid,
+	/* docking output support */
+	num_dacs = snd_hda_get_connections(codec, 0xF,
 				conn, STAC92HD83_DAC_COUNT + 1) - 1;
-	if (num_dacs < 0)
-		num_dacs = STAC92HD83_DAC_COUNT;
-
-	/* set port X to select the last DAC
-	 */
-	snd_hda_codec_write_cache(codec, nid, 0,
+	/* skip non-DAC connections */
+	while (num_dacs >= 0 &&
+			(get_wcaps_type(get_wcaps(codec, conn[num_dacs]))
+					!= AC_WID_AUD_OUT))
+		num_dacs--;
+	/* set port E and F to select the last DAC */
+	if (num_dacs >= 0) {
+		snd_hda_codec_write_cache(codec, 0xE, 0,
+			AC_VERB_SET_CONNECT_SEL, num_dacs);
+		snd_hda_codec_write_cache(codec, 0xF, 0,
 			AC_VERB_SET_CONNECT_SEL, num_dacs);
+	}
 
 	codec->proc_widget_hook = stac92hd_proc_hook;