From 9c77b846ec8b4e0c7107dd7f820172462dc84a61 Mon Sep 17 00:00:00 2001
From: Daniel T Chen <crimsun@ubuntu.com>
Date: Wed, 18 Aug 2010 19:33:43 -0400
Subject: [PATCH] ALSA: intel8x0: Mute External Amplifier by default for
 ThinkPad X31

BugLink: https://bugs.launchpad.net/bugs/619439

This ThinkPad model needs External Amplifier muted for audible playback,
so set the inv_eapd quirk for it.

Reported-and-tested-by: Dennis Bell <dennis.bell@parkerg.co.uk>
Cc: <stable@kernel.org>
Signed-off-by: Daniel T Chen <crimsun@ubuntu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/intel8x0.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c
index 6433e65c950..46774924957 100644
--- a/sound/pci/intel8x0.c
+++ b/sound/pci/intel8x0.c
@@ -1774,6 +1774,12 @@ static struct ac97_quirk ac97_quirks[] __devinitdata = {
 		.name = "HP/Compaq nx7010",
 		.type = AC97_TUNE_MUTE_LED
         },
+	{
+		.subvendor = 0x1014,
+		.subdevice = 0x0534,
+		.name = "ThinkPad X31",
+		.type = AC97_TUNE_INV_EAPD
+	},
 	{
 		.subvendor = 0x1014,
 		.subdevice = 0x1f00,
-- 
2.20.1