linux-kernel - [23/39] ALSA: hda: Fix 0 dB for Lenovo models using Conexant CX20549 (Venice)

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Date:	Mon, 24 May 2010 16:15:35 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Daniel T Chen <crimsun@...ntu.com>,
	Takashi Iwai <tiwai@...e.de>
Subject: [23/39] ALSA: hda: Fix 0 dB for Lenovo models using Conexant CX20549 (Venice)


2.6.33-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Daniel T Chen <crimsun@...ntu.com>

commit 0ebf9e3692d640917fb792a7494d05e1f5b1058f upstream.

Reference: http://mailman.alsa-project.org/pipermail/alsa-devel/2010-May/027525.html

As reported on the mailing list, we also need to cap to the 0 dB offset
for Lenovo models, else the sound will be distorted.

Reported-and-Tested-by: Tim Starling <tstarling@...imedia.org>
Signed-off-by: Daniel T Chen <crimsun@...ntu.com>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 sound/pci/hda/patch_conexant.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -1176,9 +1176,10 @@ static int patch_cxt5045(struct hda_code
 	case 0x103c:
 	case 0x1631:
 	case 0x1734:
-		/* HP, Packard Bell, & Fujitsu-Siemens laptops have really bad
-		 * sound over 0dB on NID 0x17. Fix max PCM level to 0 dB
-		 * (originally it has 0x2b steps with 0dB offset 0x14)
+	case 0x17aa:
+		/* HP, Packard Bell, Fujitsu-Siemens & Lenovo laptops have
+		 * really bad sound over 0dB on NID 0x17. Fix max PCM level to
+		 * 0 dB (originally it has 0x2b steps with 0dB offset 0x14)
 		 */
 		snd_hda_override_amp_caps(codec, 0x17, HDA_INPUT,
 					  (0x14 << AC_AMPCAP_OFFSET_SHIFT) |


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