[ALSA] Add mute LED quirk

AC97 Codec Core,Intel8x0 driver
A new quirk type, AC97_TUNE_MUTE_LED, is added for HP/Compaq laptops.
With this quirk, the EAPD bit is used to control the mute LED in
conjunction with the master mute switch.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/ac97_codec.h

@@ -554,6 +554,7 @@ enum {
 	AC97_TUNE_AD_SHARING,	/* for AD1985, turn on OMS bit and use headphone */
 	AC97_TUNE_ALC_JACK,	/* for Realtek, enable JACK detection */
 	AC97_TUNE_INV_EAPD,	/* inverted EAPD implementation */
+	AC97_TUNE_MUTE_LED,	/* EAPD bit works as mute LED */
 };
 
 struct ac97_quirk {

sound/pci/ac97/ac97_codec.c

@@ -2430,6 +2430,43 @@ static int tune_inv_eapd(ac97_t *ac97)
 	return 0;
 }
 
+static int master_mute_sw_put_single(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	int err = snd_ac97_put_single(kcontrol, ucontrol);
+	if (err > 0) {
+		ac97_t *ac97 = snd_kcontrol_chip(kcontrol);
+		snd_ac97_update_bits(ac97, AC97_POWERDOWN, 0x8000,
+				     ac97->regs[AC97_MASTER] & 0x8000);
+	}
+	return err;
+}
+
+static int master_mute_sw_put_double(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	int err = snd_ac97_put_double(kcontrol, ucontrol);
+	if (err > 0) {
+		ac97_t *ac97 = snd_kcontrol_chip(kcontrol);
+		snd_ac97_update_bits(ac97, AC97_POWERDOWN, 0x8000,
+				     (ac97->regs[AC97_MASTER] & 0x8080) == 0x8080 ?
+				     0x8000 : 0);
+	}
+	return err;
+}
+
+static int tune_mute_led(ac97_t *ac97)
+{
+	snd_kcontrol_t *msw = ctl_find(ac97, "Master Playback Switch", NULL);
+	if (! msw)
+		return -ENOENT;
+	if (msw->put == snd_ac97_put_double)
+		msw->put = master_mute_sw_put_double;
+	else
+		msw->put = master_mute_sw_put_single;
+	snd_ac97_remove_ctl(ac97, "External Amplifier", NULL);
+	snd_ac97_update_bits(ac97, AC97_POWERDOWN, 0x8000, 0x8000); /* mute LED on */
+	return 0;
+}
+
 static int apply_quirk(ac97_t *ac97, int quirk)
 {
 	switch (quirk) {
@@ -2447,6 +2484,8 @@ static int apply_quirk(ac97_t *ac97, int quirk)
 		return tune_alc_jack(ac97);
 	case AC97_TUNE_INV_EAPD:
 		return tune_inv_eapd(ac97);
+	case AC97_TUNE_MUTE_LED:
+		return tune_mute_led(ac97);
 	}
 	return -EINVAL;
 }

sound/pci/intel8x0.c

@@ -1737,6 +1737,12 @@ static struct ac97_quirk ac97_quirks[] __devinitdata = {
 		.name = "Compaq Evo D510C",
 		.type = AC97_TUNE_HP_ONLY
 	},
+        {
+		.vendor = 0x0e11,
+		.device = 0x0860,
+		.name = "HP/Compaq nx7010",
+		.type = AC97_TUNE_MUTE_LED
+        },
 	{
 		.vendor = 0x1014,
 		.device = 0x1f00,
@@ -1779,6 +1785,12 @@ static struct ac97_quirk ac97_quirks[] __devinitdata = {
 		.name = "Hewlett-Packard onboard",
 		.type = AC97_TUNE_HP_ONLY
 	},
+	{
+		.vendor = 0x103c,
+		.device = 0x0890,
+		.name = "HP NC6000",
+		.type = AC97_TUNE_MUTE_LED
+	},
 	{
 		.vendor = 0x103c,
 		.device = 0x12f1,