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>
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@ -1197,9 +1197,10 @@ static int patch_cxt5045(struct hda_codec *codec)
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case 0x103c:
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case 0x1631:
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case 0x1734:
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/* HP, Packard Bell, & Fujitsu-Siemens laptops have really bad
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* sound over 0dB on NID 0x17. Fix max PCM level to 0 dB
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* (originally it has 0x2b steps with 0dB offset 0x14)
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case 0x17aa:
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/* HP, Packard Bell, Fujitsu-Siemens & Lenovo laptops have
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* really bad sound over 0dB on NID 0x17. Fix max PCM level to
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* 0 dB (originally it has 0x2b steps with 0dB offset 0x14)
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*/
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snd_hda_override_amp_caps(codec, 0x17, HDA_INPUT,
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(0x14 << AC_AMPCAP_OFFSET_SHIFT) |
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