[alsa-devel] [PATCH] ALSA: hda - Remove speaker clicks on CX20549

David Henningsson david.henningsson at canonical.com
Thu Feb 14 11:36:39 CET 2013

This chip needs the speaker pin to go to D3 to avoid clicks,
so default_power_filter does not work here.

This was found on Thinkpad R61i/T61i but I guess it applies to
the entire chip. If not, quirks should be set for at least
PCI SSID 17aa:20ac.

Thanks to c4pp4 for testing.

BugLink: https://bugs.launchpad.net/bugs/886975
Signed-off-by: David Henningsson <david.henningsson at canonical.com>
 sound/pci/hda/patch_conexant.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/pci/hda/patch_conexant.c b/sound/pci/hda/patch_conexant.c
index 7d941ef..941bf6c 100644
--- a/sound/pci/hda/patch_conexant.c
+++ b/sound/pci/hda/patch_conexant.c
@@ -3350,6 +3350,7 @@ static int patch_conexant_auto(struct hda_codec *codec)
 	switch (codec->vendor_id) {
 	case 0x14f15045:
 		codec->single_adc_amp = 1;
+		codec->power_filter = NULL; /* Needs speaker amp to D3 to avoid click */
 	case 0x14f15047:
 		codec->pin_amp_workaround = 1;

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