ALSA: add support for Macbook Air 2,1 internal speaker

Add support for Macbook Air 2,1 (late 2008) internal speaker and
headphones. Create a "mba21" model for snd-hda-intel.
Signed-off-by: Reimundo Heluani <rheluani@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_realtek.c

@@ -209,6 +209,7 @@ enum {
 	ALC882_ASUS_A7J,
 	ALC882_ASUS_A7M,
 	ALC885_MACPRO,
+	ALC885_MBA21,
 	ALC885_MBP3,
 	ALC885_MB5,
 	ALC885_MACMINI3,
@@ -6948,6 +6949,13 @@ static struct hda_channel_mode alc882_sixstack_modes[2] = {
 	{ 8, alc882_sixstack_ch8_init },
 };
 
+
+/* Macbook Air 2,1 */
+
+static struct hda_channel_mode alc885_mba21_ch_modes[1] = {
+      { 2, NULL },
+};
+
 /*
  * macbook pro ALC885 can switch LineIn to LineOut without losing Mic
  */
@@ -7220,6 +7228,15 @@ static struct snd_kcontrol_new alc882_base_mixer[] = {
 	{ } /* end */
 };
 
+/* Macbook Air 2,1 same control for HP and internal Speaker */
+
+static struct snd_kcontrol_new alc885_mba21_mixer[] = {
+      HDA_CODEC_VOLUME("Speaker Playback Volume", 0x0c, 0x00, HDA_OUTPUT),
+      HDA_BIND_MUTE("Speaker Playback Switch", 0x0c, 0x02, HDA_OUTPUT),
+     { }
+};
+
+
 static struct snd_kcontrol_new alc885_mbp3_mixer[] = {
 	HDA_CODEC_VOLUME("Speaker Playback Volume", 0x0c, 0x00, HDA_OUTPUT),
 	HDA_BIND_MUTE   ("Speaker Playback Switch", 0x0c, 0x02, HDA_INPUT),
@@ -7689,6 +7706,29 @@ static struct hda_verb alc885_macmini3_init_verbs[] = {
 	{ }
 };
 
+
+static struct hda_verb alc885_mba21_init_verbs[] = {
+	/*Internal and HP Speaker Mixer*/
+	{0x0c, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_ZERO},
+	{0x0c, AC_VERB_SET_AMP_GAIN_MUTE, AMP_IN_UNMUTE(0)},
+	{0x0c, AC_VERB_SET_AMP_GAIN_MUTE, AMP_IN_UNMUTE(1)},
+	/*Internal Speaker Pin (0x0c)*/
+	{0x18, AC_VERB_SET_PIN_WIDGET_CONTROL, (PIN_OUT | AC_PINCTL_VREF_50) },
+	{0x18, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE},
+	{0x18, AC_VERB_SET_CONNECT_SEL, 0x00},
+	/* HP Pin: output 0 (0x0e) */
+	{0x14, AC_VERB_SET_PIN_WIDGET_CONTROL, 0xc4},
+	{0x14, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE},
+	{0x14, AC_VERB_SET_CONNECT_SEL, 0x00},
+	{0x14, AC_VERB_SET_UNSOLICITED_ENABLE, (ALC880_HP_EVENT | AC_USRSP_EN)},
+	/* Line in (is hp when jack connected)*/
+	{0x19, AC_VERB_SET_PIN_WIDGET_CONTROL, AC_PINCTL_VREF_50},
+	{0x19, AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_MUTE},
+
+	{ }
+ };
+
+
 /* Macbook Pro rev3 */
 static struct hda_verb alc885_mbp3_init_verbs[] = {
 	/* Front mixer: unmute input/output amp left and right (volume = 0) */
@@ -7854,6 +7894,17 @@ static void alc885_imac24_setup(struct hda_codec *codec)
 #define alc885_mb5_setup	alc885_imac24_setup
 #define alc885_macmini3_setup	alc885_imac24_setup
 
+/* Macbook Air 2,1 */
+static void alc885_mba21_setup(struct hda_codec *codec)
+{
+       struct alc_spec *spec = codec->spec;
+
+       spec->autocfg.hp_pins[0] = 0x14;
+       spec->autocfg.speaker_pins[0] = 0x18;
+}
+
+
+
 static void alc885_mbp3_setup(struct hda_codec *codec)
 {
 	struct alc_spec *spec = codec->spec;
@@ -9017,6 +9068,7 @@ static const char *alc882_models[ALC882_MODEL_LAST] = {
 	[ALC885_MACPRO]		= "macpro",
 	[ALC885_MB5]		= "mb5",
 	[ALC885_MACMINI3]	= "macmini3",
+	[ALC885_MBA21]		= "mba21",
 	[ALC885_MBP3]		= "mbp3",
 	[ALC885_IMAC24]		= "imac24",
 	[ALC885_IMAC91]		= "imac91",
@@ -9252,6 +9304,18 @@ static struct alc_config_preset alc882_presets[] = {
 		.input_mux = &alc882_capture_source,
 		.dig_out_nid = ALC882_DIGOUT_NID,
 	},
+	   [ALC885_MBA21] = {
+			.mixers = { alc885_mba21_mixer },
+			.init_verbs = { alc885_mba21_init_verbs, alc880_gpio1_init_verbs },
+			.num_dacs = 2,
+			.dac_nids = alc882_dac_nids,
+			.channel_mode = alc885_mba21_ch_modes,
+			.num_channel_mode = ARRAY_SIZE(alc885_mba21_ch_modes),
+			.input_mux = &alc882_capture_source,
+			.unsol_event = alc_automute_amp_unsol_event,
+			.setup = alc885_mba21_setup,
+			.init_hook = alc_automute_amp,
+       },
 	[ALC885_MBP3] = {
 		.mixers = { alc885_mbp3_mixer, alc882_chmode_mixer },
 		.init_verbs = { alc885_mbp3_init_verbs,