[ALSA] hda-codec - Fix invalid access to non-existing dmux on STAC

The digital mux on STAC codecs doesn't always exist although the
driver builds dmux enum mixer elements unconditionally.
Now the driver creates 'digital input source' mixer elements only
when dmux is available.
Also, the patch adds the missing dmux definition for STAC925x.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/pci/hda/patch_sigmatel.c

@@ -139,6 +139,7 @@ struct sigmatel_spec {
 	hda_nid_t *dmic_nids;
 	unsigned int num_dmics;
 	hda_nid_t *dmux_nids;
+	unsigned int num_dmuxes;
 	hda_nid_t dig_in_nid;
 
 	/* pin widgets */
@@ -244,6 +245,10 @@ static hda_nid_t stac925x_dmic_nids[STAC925X_NUM_DMICS + 1] = {
 	0x15, 0
 };
 
+static hda_nid_t stac925x_dmux_nids[1] = {
+	0x14,
+};
+
 static hda_nid_t stac922x_adc_nids[2] = {
         0x06, 0x07,
 };
@@ -278,7 +283,7 @@ static hda_nid_t stac9205_mux_nids[2] = {
 };
 
 static hda_nid_t stac9205_dmux_nids[1] = {
-		0x1d,
+	0x1d,
 };
 
 #define STAC9205_NUM_DMICS	2
@@ -596,16 +601,6 @@ static struct hda_verb stac9205_core_init[] = {
 	{}
 };
 
-#define STAC_DIGITAL_INPUT_SOURCE(cnt) \
-	{ \
-		.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
-		.name = "Digital Input Source", \
-		.count = cnt, \
-		.info = stac92xx_dmux_enum_info, \
-		.get = stac92xx_dmux_enum_get, \
-		.put = stac92xx_dmux_enum_put,\
-	}
-
 #define STAC_INPUT_SOURCE(cnt) \
 	{ \
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
@@ -638,7 +633,6 @@ static struct snd_kcontrol_new stac9200_mixer[] = {
 };
 
 static struct snd_kcontrol_new stac92hd73xx_6ch_mixer[] = {
-	STAC_DIGITAL_INPUT_SOURCE(2),
 	STAC_ANALOG_LOOPBACK(0xFA0, 0x7A1, 3),
 
 	/* hardware gain controls */
@@ -669,7 +663,6 @@ static struct snd_kcontrol_new stac92hd73xx_6ch_mixer[] = {
 };
 
 static struct snd_kcontrol_new stac92hd73xx_8ch_mixer[] = {
-	STAC_DIGITAL_INPUT_SOURCE(2),
 	STAC_ANALOG_LOOPBACK(0xFA0, 0x7A1, 4),
 
 	/* hardware gain controls */
@@ -700,7 +693,6 @@ static struct snd_kcontrol_new stac92hd73xx_8ch_mixer[] = {
 };
 
 static struct snd_kcontrol_new stac92hd73xx_10ch_mixer[] = {
-	STAC_DIGITAL_INPUT_SOURCE(2),
 	STAC_ANALOG_LOOPBACK(0xFA0, 0x7A1, 5),
 
 	/* hardware gain controls */
@@ -731,7 +723,6 @@ static struct snd_kcontrol_new stac92hd73xx_10ch_mixer[] = {
 };
 
 static struct snd_kcontrol_new stac92hd71bxx_analog_mixer[] = {
-	STAC_DIGITAL_INPUT_SOURCE(1),
 	STAC_INPUT_SOURCE(2),
 
 	/* hardware gain controls */
@@ -752,7 +743,6 @@ static struct snd_kcontrol_new stac92hd71bxx_analog_mixer[] = {
 };
 
 static struct snd_kcontrol_new stac92hd71bxx_mixer[] = {
-	STAC_DIGITAL_INPUT_SOURCE(1),
 	STAC_INPUT_SOURCE(2),
 	STAC_ANALOG_LOOPBACK(0xFA0, 0x7A0, 2),
 
@@ -779,7 +769,6 @@ static struct snd_kcontrol_new stac925x_mixer[] = {
 };
 
 static struct snd_kcontrol_new stac9205_mixer[] = {
-	STAC_DIGITAL_INPUT_SOURCE(1),
 	STAC_INPUT_SOURCE(2),
 	STAC_ANALOG_LOOPBACK(0xFE0, 0x7E0, 1),
 
@@ -809,7 +798,6 @@ static struct snd_kcontrol_new stac922x_mixer[] = {
 
 
 static struct snd_kcontrol_new stac927x_mixer[] = {
-	STAC_DIGITAL_INPUT_SOURCE(1),
 	STAC_INPUT_SOURCE(3),
 	STAC_ANALOG_LOOPBACK(0xFEB, 0x7EB, 1),
 
@@ -827,6 +815,15 @@ static struct snd_kcontrol_new stac927x_mixer[] = {
 	{ } /* end */
 };
 
+static struct snd_kcontrol_new stac_dmux_mixer = {
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "Digital Input Source",
+	/* count set later */
+	.info = stac92xx_dmux_enum_info,
+	.get = stac92xx_dmux_enum_get,
+	.put = stac92xx_dmux_enum_put,
+};
+
 static int stac92xx_build_controls(struct hda_codec *codec)
 {
 	struct sigmatel_spec *spec = codec->spec;
@@ -842,6 +839,13 @@ static int stac92xx_build_controls(struct hda_codec *codec)
 		if (err < 0)
 			return err;
 	}
+	if (spec->num_dmuxes > 0) {
+		stac_dmux_mixer.count = spec->num_dmuxes;
+		err = snd_ctl_add(codec->bus->card,
+				  snd_ctl_new1(&stac_dmux_mixer, codec));
+		if (err < 0)
+			return err;
+	}
 
 	if (spec->multiout.dig_out_nid) {
 		err = snd_hda_create_spdif_out_ctls(codec, spec->multiout.dig_out_nid);
@@ -2967,6 +2971,8 @@ static int patch_stac925x(struct hda_codec *codec)
 	case 0x83847637: /* STAC9251D */
 		spec->num_dmics = STAC925X_NUM_DMICS;
 		spec->dmic_nids = stac925x_dmic_nids;
+		spec->num_dmuxes = ARRAY_SIZE(stac925x_dmux_nids);
+		spec->dmux_nids = stac925x_dmux_nids;
 		break;
 	default:
 		spec->num_dmics = 0;
@@ -3075,6 +3081,7 @@ static int patch_stac92hd73xx(struct hda_codec *codec)
 	spec->num_muxes = ARRAY_SIZE(stac92hd73xx_mux_nids);
 	spec->num_adcs = ARRAY_SIZE(stac92hd73xx_adc_nids);
 	spec->num_dmics = STAC92HD73XX_NUM_DMICS;
+	spec->num_dmuxes = ARRAY_SIZE(stac92hd73xx_dmux_nids);
 	spec->dinput_mux = &stac92hd73xx_dmux;
 	/* GPIO0 High = Enable EAPD */
 	spec->gpio_mask = spec->gpio_data = 0x000001;
@@ -3160,6 +3167,7 @@ static int patch_stac92hd71bxx(struct hda_codec *codec)
 	spec->num_muxes = ARRAY_SIZE(stac92hd71bxx_mux_nids);
 	spec->num_adcs = ARRAY_SIZE(stac92hd71bxx_adc_nids);
 	spec->num_dmics = STAC92HD71BXX_NUM_DMICS;
+	spec->num_dmuxes = ARRAY_SIZE(stac92hd71bxx_dmux_nids);
 
 	spec->multiout.num_dacs = 2;
 	spec->multiout.hp_nid = 0x11;
@@ -3345,6 +3353,7 @@ static int patch_stac927x(struct hda_codec *codec)
 		spec->init = d965_core_init;
 		spec->mixer = stac927x_mixer;
 		spec->dmux_nids = stac927x_dmux_nids;
+		spec->num_dmuxes = ARRAY_SIZE(stac927x_dmux_nids);
 		break;
 	default:
 		/* GPIO0 High = Enable EAPD */
@@ -3415,6 +3424,7 @@ static int patch_stac9205(struct hda_codec *codec)
 	spec->dmic_nids = stac9205_dmic_nids;
 	spec->num_dmics = STAC9205_NUM_DMICS;
 	spec->dmux_nids = stac9205_dmux_nids;
+	spec->num_dmuxes = ARRAY_SIZE(stac9205_dmux_nids);
 
 	spec->init = stac9205_core_init;
 	spec->mixer = stac9205_mixer;