diff options
| author | Daniel T Chen <crimsun@ubuntu.com> | 2010-03-21 18:34:43 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-04-01 15:58:22 -0700 |
| commit | f09315f7cd6cfdb98e90e6686116251bb026020b (patch) | |
| tree | 76dce03c0ccd2d1bb8ad4cf93071ebf90cb54d65 /sound/pci | |
| parent | 1ae20fd7e9fed26a480e3c078e498e6acb5f7828 (diff) | |
ALSA: hda: Fix 0 dB offset for HP laptops using CX20551 (Waikiki)
commit 025f206c9e0f96cc41567b01c07fb852d8900da1 upstream.
BugLink: https://launchpad.net/bugs/420578
The OR has verified that his hardware distorts because of the 0 dB
offset not corresponding to the highest PCM level. Fix this by capping
said PCM level to 0 dB similarly to what we do for CX20549 (Venice).
Reported-by: Mike Pontillo <pontillo@gmail.com>
Tested-by: Mike Pontillo <pontillo@gmail.com>
Signed-off-by: Daniel T Chen <crimsun@ubuntu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'sound/pci')
| -rw-r--r-- | sound/pci/hda/patch_conexant.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c index 905859d4f4d..79afb46a0fb 100644 --- a/sound/pci/hda/patch_conexant.c +++ b/sound/pci/hda/patch_conexant.c @@ -1581,6 +1581,21 @@ static int patch_cxt5047(struct hda_codec *codec) #endif } spec->vmaster_nid = 0x13; + + switch (codec->subsystem_id >> 16) { + case 0x103c: + /* HP laptops have really bad sound over 0 dB on NID 0x10. + * Fix max PCM level to 0 dB (originally it has 0x1e steps + * with 0 dB offset 0x17) + */ + snd_hda_override_amp_caps(codec, 0x10, HDA_INPUT, + (0x17 << AC_AMPCAP_OFFSET_SHIFT) | + (0x17 << AC_AMPCAP_NUM_STEPS_SHIFT) | + (0x05 << AC_AMPCAP_STEP_SIZE_SHIFT) | + (1 << AC_AMPCAP_MUTE_SHIFT)); + break; + } + return 0; } |