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ALSA: hda: Fix 0 dB for Lenovo models using Conexant CX20549 (Venice) 

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@wikimedia.org>
Cc: <stable@kernel.org>
Signed-off-by: Daniel T Chen <crimsun@ubuntu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Daniel T Chen 2010-05-10 21:50:04 +02:00 committed by Takashi Iwai
parent 482c453315
commit 0ebf9e3692
1 changed files with 4 additions and 3 deletions
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7
sound/pci/hda/patch_conexant.c
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@ -1197,9 +1197,10 @@ static int patch_cxt5045(struct hda_codec *codec)
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) |