[ALSA] hda-codec - Fix AD1988 SPDIF output

The SPDIF output on AD1988 had some problems due to the wrongly routed
analog loopback to SPDIF.  This patch fixes the implementation of
'IEC958 Playback Source' mixer to handle the amp bits of mixer widget
0x1d correctly.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

sound/pci/hda/patch_analog.c

@@ -1889,16 +1889,19 @@ static int ad1988_spdif_playback_source_get(struct snd_kcontrol *kcontrol,
 	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
 	unsigned int sel;
 
-	sel = snd_hda_codec_read(codec, 0x02, 0, AC_VERB_GET_CONNECT_SEL, 0);
-	if (sel > 0) {
+	sel = snd_hda_codec_read(codec, 0x1d, 0, AC_VERB_GET_AMP_GAIN_MUTE,
+				 AC_AMP_GET_INPUT);
+	if (!(sel & 0x80))
+		ucontrol->value.enumerated.item[0] = 0;
+	else {
 		sel = snd_hda_codec_read(codec, 0x0b, 0,
 					 AC_VERB_GET_CONNECT_SEL, 0);
 		if (sel < 3)
 			sel++;
 		else
 			sel = 0;
+		ucontrol->value.enumerated.item[0] = sel;
 	}
-	ucontrol->value.enumerated.item[0] = sel;
 	return 0;
 }
 
@@ -1910,17 +1913,32 @@ static int ad1988_spdif_playback_source_put(struct snd_kcontrol *kcontrol,
 	int change;
 
 	val = ucontrol->value.enumerated.item[0];
-	sel = snd_hda_codec_read(codec, 0x02, 0, AC_VERB_GET_CONNECT_SEL, 0);
 	if (!val) {
-		change = sel != 0;
-		if (change || codec->in_resume)
-			snd_hda_codec_write(codec, 0x02, 0,
-					    AC_VERB_SET_CONNECT_SEL, 0);
+		sel = snd_hda_codec_read(codec, 0x1d, 0,
+					 AC_VERB_GET_AMP_GAIN_MUTE,
+					 AC_AMP_GET_INPUT);
+		change = sel & 0x80;
+		if (change || codec->in_resume) {
+			snd_hda_codec_write(codec, 0x1d, 0,
+					    AC_VERB_SET_AMP_GAIN_MUTE,
+					    AMP_IN_UNMUTE(0));
+			snd_hda_codec_write(codec, 0x1d, 0,
+					    AC_VERB_SET_AMP_GAIN_MUTE,
+					    AMP_IN_MUTE(1));
+		}
 	} else {
-		change = sel == 0;
-		if (change || codec->in_resume)
-			snd_hda_codec_write(codec, 0x02, 0,
-					    AC_VERB_SET_CONNECT_SEL, 1);
+		sel = snd_hda_codec_read(codec, 0x1d, 0,
+					 AC_VERB_GET_AMP_GAIN_MUTE,
+					 AC_AMP_GET_INPUT | 0x01);
+		change = sel & 0x80;
+		if (change || codec->in_resume) {
+			snd_hda_codec_write(codec, 0x1d, 0,
+					    AC_VERB_SET_AMP_GAIN_MUTE,
+					    AMP_IN_MUTE(0));
+			snd_hda_codec_write(codec, 0x1d, 0,
+					    AC_VERB_SET_AMP_GAIN_MUTE,
+					    AMP_IN_UNMUTE(1));
+		}
 		sel = snd_hda_codec_read(codec, 0x0b, 0,
 					 AC_VERB_GET_CONNECT_SEL, 0) + 1;
 		change |= sel != val;
@@ -2039,10 +2057,9 @@ static struct hda_verb ad1988_spdif_init_verbs[] = {
 	{0x02, AC_VERB_SET_CONNECT_SEL, 0x0}, /* PCM */
 	{0x0b, AC_VERB_SET_CONNECT_SEL, 0x0}, /* ADC1 */
 	{0x1d, AC_VERB_SET_AMP_GAIN_MUTE, AMP_IN_UNMUTE(0)},
-	{0x1d, AC_VERB_SET_AMP_GAIN_MUTE, AMP_IN_UNMUTE(1)},
+	{0x1d, AC_VERB_SET_AMP_GAIN_MUTE, AMP_IN_MUTE(1)},
 	/* SPDIF out pin */
 	{0x1b, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE | 0x27}, /* 0dB */
-	{0x1b, AC_VERB_SET_AMP_GAIN_MUTE, AMP_IN_UNMUTE(0) | 0x17}, /* 0dB */
 
 	{ }
 };