aboutsummaryrefslogtreecommitdiffstats
path: root/sound
diff options
context:
space:
mode:
authorDaniel T Chen <crimsun@ubuntu.com>2010-03-21 18:34:43 -0400
committerTakashi Iwai <tiwai@suse.de>2010-03-22 03:01:41 -0400
commit025f206c9e0f96cc41567b01c07fb852d8900da1 (patch)
treea59cdd454ab0309f48bd89d69f63921b6100354a /sound
parente3d2530a6cea80987f77b75d8784a00f3aaf22ff (diff)
ALSA: hda: Fix 0 dB offset for HP laptops using CX20551 (Waikiki)
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> Cc: <stable@kernel.org> Signed-off-by: Daniel T Chen <crimsun@ubuntu.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/pci/hda/patch_conexant.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c
index 194a28c54992..61682e1d09da 100644
--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -1591,6 +1591,21 @@ static int patch_cxt5047(struct hda_codec *codec)
1591#endif 1591#endif
1592 } 1592 }
1593 spec->vmaster_nid = 0x13; 1593 spec->vmaster_nid = 0x13;
1594
1595 switch (codec->subsystem_id >> 16) {
1596 case 0x103c:
1597 /* HP laptops have really bad sound over 0 dB on NID 0x10.
1598 * Fix max PCM level to 0 dB (originally it has 0x1e steps
1599 * with 0 dB offset 0x17)
1600 */
1601 snd_hda_override_amp_caps(codec, 0x10, HDA_INPUT,
1602 (0x17 << AC_AMPCAP_OFFSET_SHIFT) |
1603 (0x17 << AC_AMPCAP_NUM_STEPS_SHIFT) |
1604 (0x05 << AC_AMPCAP_STEP_SIZE_SHIFT) |
1605 (1 << AC_AMPCAP_MUTE_SHIFT));
1606 break;
1607 }
1608
1594 return 0; 1609 return 0;
1595} 1610}
1596 1611