(precise pre-stable) [PATCH] ALSA: HDA: Use LPIB position fix for Macbook Pro 7, 1

[David Henningsson]

Several users have reported "choppy" audio under the 3.2 kernel,
and that changing position_fix to 1 has resolved their problem.
The chip is an nVidia Corporation MCP89 High Definition Audio,
[10de:0d94] (rev a2).

Cc: stable at kernel.org (v3.2+)
BugLink: https://bugs.launchpad.net/bugs/909419
Signed-off-by: David Henningsson <david.henningsson at canonical.com>
Signed-off-by: Takashi Iwai <tiwai at suse.de>
(cherry picked from commit b01de4fb40137fbda7530550ff0cd37171dafb0c,
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git)
---

 * Several macbooks (with the same ID, see duplicates to bug 909419)
   seem to be hitting this one, so it might be worth picking it for 
   our next upload, instead of waiting for stable. 

 sound/pci/hda/hda_intel.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index c2f79e6..5b2b75b 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2509,6 +2509,7 @@ static struct snd_pci_quirk position_fix_list[] __devinitdata = {
 	SND_PCI_QUIRK(0x1043, 0x81e7, "ASUS M2V", POS_FIX_LPIB),
 	SND_PCI_QUIRK(0x1043, 0x83ce, "ASUS 1101HA", POS_FIX_LPIB),
 	SND_PCI_QUIRK(0x104d, 0x9069, "Sony VPCS11V9E", POS_FIX_LPIB),
+	SND_PCI_QUIRK(0x10de, 0xcb89, "Macbook Pro 7,1", POS_FIX_LPIB),
 	SND_PCI_QUIRK(0x1297, 0x3166, "Shuttle", POS_FIX_LPIB),
 	SND_PCI_QUIRK(0x1458, 0xa022, "ga-ma770-ud3", POS_FIX_LPIB),
 	SND_PCI_QUIRK(0x1462, 0x1002, "MSI Wind U115", POS_FIX_LPIB),
-- 
1.7.8.3