ALSA: Add vmaster controls for Pmac 5500, iMac G3 SL, and PBook G3 Lombard

Add virtual master controls for PowerMac 5500 (AWACS) and iMac G3 Slot-loading
and PowerBook G3 Lombard (Screamer).
Signed-off-by: Risto Suominen <Risto.Suominen@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/ppc/Kconfig

@@ -13,6 +13,7 @@ config SND_POWERMAC
 	tristate "PowerMac (AWACS, DACA, Burgundy, Tumbler, Keywest)"
 	depends on I2C && INPUT && PPC_PMAC
 	select SND_PCM
+	select SND_VMASTER
 	help
 	  Say Y here to include support for the integrated sound device.
 

sound/ppc/awacs.c

@@ -608,9 +608,12 @@ static struct snd_kcontrol_new snd_pmac_screamer_mixers_beige[] __initdata = {
 	AWACS_SWITCH("CD Capture Switch", 0, SHIFT_MUX_LINE, 0),
 };
 
-static struct snd_kcontrol_new snd_pmac_screamer_mixers_imac[] __initdata = {
+static struct snd_kcontrol_new snd_pmac_screamer_mixers_lo[] __initdata = {
 	AWACS_VOLUME("Line out Playback Volume", 2, 6, 1),
-	AWACS_VOLUME("Master Playback Volume", 5, 6, 1),
+};
+
+static struct snd_kcontrol_new snd_pmac_screamer_mixers_imac[] __initdata = {
+	AWACS_VOLUME("Play-through Playback Volume", 5, 6, 1),
 	AWACS_SWITCH("CD Capture Switch", 0, SHIFT_MUX_CD, 0),
 };
 
@@ -627,6 +630,10 @@ static struct snd_kcontrol_new snd_pmac_awacs_mixers_pmac7500[] __initdata = {
 	AWACS_SWITCH("Line Capture Switch", 0, SHIFT_MUX_MIC, 0),
 };
 
+static struct snd_kcontrol_new snd_pmac_awacs_mixers_pmac5500[] __initdata = {
+	AWACS_VOLUME("Headphone Playback Volume", 2, 6, 1),
+};
+
 static struct snd_kcontrol_new snd_pmac_awacs_mixers_pmac[] __initdata = {
 	AWACS_VOLUME("Master Playback Volume", 2, 6, 1),
 	AWACS_SWITCH("CD Capture Switch", 0, SHIFT_MUX_CD, 0),
@@ -645,12 +652,19 @@ static struct snd_kcontrol_new snd_pmac_screamer_mixers2[] __initdata = {
 	AWACS_SWITCH("Mic Capture Switch", 0, SHIFT_MUX_LINE, 0),
 };
 
+static struct snd_kcontrol_new snd_pmac_awacs_mixers2_pmac5500[] __initdata = {
+	AWACS_SWITCH("CD Capture Switch", 0, SHIFT_MUX_CD, 0),
+};
+
 static struct snd_kcontrol_new snd_pmac_awacs_master_sw __initdata =
 AWACS_SWITCH("Master Playback Switch", 1, SHIFT_HDMUTE, 1);
 
 static struct snd_kcontrol_new snd_pmac_awacs_master_sw_imac __initdata =
 AWACS_SWITCH("Line out Playback Switch", 1, SHIFT_HDMUTE, 1);
 
+static struct snd_kcontrol_new snd_pmac_awacs_master_sw_pmac5500 __initdata =
+AWACS_SWITCH("Headphone Playback Switch", 1, SHIFT_HDMUTE, 1);
+
 static struct snd_kcontrol_new snd_pmac_awacs_mic_boost[] __initdata = {
 	AWACS_SWITCH("Mic Boost Capture Switch", 0, SHIFT_GAINLINE, 0),
 };
@@ -868,6 +882,8 @@ snd_pmac_awacs_init(struct snd_pmac *chip)
 	int lombard = IS_LOMBARD;
 	int imac;
 	int err, vol;
+	struct snd_kcontrol *vmaster_sw, *vmaster_vol;
+	struct snd_kcontrol *master_vol, *speaker_vol;
 
 	imac1 = IS_IMAC1;
 	imac2 = IS_IMAC2;
@@ -968,19 +984,35 @@ snd_pmac_awacs_init(struct snd_pmac *chip)
 				   snd_pmac_awacs_mixers2);
 	if (err < 0)
 		return err;
+	if (pm5500) {
+		err = build_mixers(chip,
+				   ARRAY_SIZE(snd_pmac_awacs_mixers2_pmac5500),
+				   snd_pmac_awacs_mixers2_pmac5500);
+		if (err < 0)
+			return err;
+	}
 	if (pm7500)
 		err = build_mixers(chip,
 				   ARRAY_SIZE(snd_pmac_awacs_mixers_pmac7500),
 				   snd_pmac_awacs_mixers_pmac7500);
+	else if (pm5500)
+		err = snd_ctl_add(chip->card,
+		    (master_vol = snd_ctl_new1(snd_pmac_awacs_mixers_pmac5500,
+						chip)));
 	else if (beige)
 		err = build_mixers(chip,
 				   ARRAY_SIZE(snd_pmac_screamer_mixers_beige),
 				   snd_pmac_screamer_mixers_beige);
-	else if (imac || lombard)
+	else if (imac || lombard) {
+		err = snd_ctl_add(chip->card,
+		    (master_vol = snd_ctl_new1(snd_pmac_screamer_mixers_lo,
+						chip)));
+		if (err < 0)
+			return err;
 		err = build_mixers(chip,
 				   ARRAY_SIZE(snd_pmac_screamer_mixers_imac),
 				   snd_pmac_screamer_mixers_imac);
-	else if (g4agp)
+	} else if (g4agp)
 		err = build_mixers(chip,
 				   ARRAY_SIZE(snd_pmac_screamer_mixers_g4agp),
 				   snd_pmac_screamer_mixers_g4agp);
@@ -992,6 +1024,8 @@ snd_pmac_awacs_init(struct snd_pmac *chip)
 		return err;
 	chip->master_sw_ctl = snd_ctl_new1((pm7500 || imac || g4agp || lombard)
 			? &snd_pmac_awacs_master_sw_imac
+			: pm5500
+			? &snd_pmac_awacs_master_sw_pmac5500
 			: &snd_pmac_awacs_master_sw, chip);
 	err = snd_ctl_add(chip->card, chip->master_sw_ctl);
 	if (err < 0)
@@ -1023,8 +1057,9 @@ snd_pmac_awacs_init(struct snd_pmac *chip)
 #endif /* PMAC_AMP_AVAIL */
 	{
 		/* route A = headphone, route C = speaker */
-		err = build_mixers(chip, ARRAY_SIZE(snd_pmac_awacs_speaker_vol),
-					snd_pmac_awacs_speaker_vol);
+		err = snd_ctl_add(chip->card,
+		    (speaker_vol = snd_ctl_new1(snd_pmac_awacs_speaker_vol,
+						chip)));
 		if (err < 0)
 			return err;
 		chip->speaker_sw_ctl = snd_ctl_new1(imac1
@@ -1037,6 +1072,33 @@ snd_pmac_awacs_init(struct snd_pmac *chip)
 			return err;
 	}
 
+	if (pm5500 || imac || lombard) {
+		vmaster_sw = snd_ctl_make_virtual_master(
+			"Master Playback Switch", (unsigned int *) NULL);
+		err = snd_ctl_add_slave_uncached(vmaster_sw,
+						 chip->master_sw_ctl);
+		if (err < 0)
+			return err;
+		err = snd_ctl_add_slave_uncached(vmaster_sw,
+						  chip->speaker_sw_ctl);
+		if (err < 0)
+			return err;
+		err = snd_ctl_add(chip->card, vmaster_sw);
+		if (err < 0)
+			return err;
+		vmaster_vol = snd_ctl_make_virtual_master(
+			"Master Playback Volume", (unsigned int *) NULL);
+		err = snd_ctl_add_slave(vmaster_vol, master_vol);
+		if (err < 0)
+			return err;
+		err = snd_ctl_add_slave(vmaster_vol, speaker_vol);
+		if (err < 0)
+			return err;
+		err = snd_ctl_add(chip->card, vmaster_vol);
+		if (err < 0)
+			return err;
+	}
+
 	if (beige || g4agp)
 		err = build_mixers(chip,
 				ARRAY_SIZE(snd_pmac_screamer_mic_boost_beige),