[alsa-devel] snd-hda-intel : issues with mic boost on ALC3236

[Takashi Iwai]

At Sun, 3 May 2015 23:27:46 +0200,
Simon Derr wrote:
> 
> Hello,
> 
> I have made some progress.
> 
> First I may have been mistaken when I thought that the external mic
> was working. Further testing makes me think that it was actually the
> internal mic picking up sound while the headset was connected. But
> that's not really an issue for me, since I am mostly interested in the
> internal mic.
> 
> Now, I have used ftrace to trace what was going on when I plugged the
> headset while using dell-headset-multi. This allowed me to write a
> patchfile that I can load using
> 
>    modprobe snd-hda-intel patch=,my-hda-patch.fw
> 
> With the contents of /lib/firmware/my-hda-patch.fw being as follows:
> 
> [codec]
> 0x10ec0233 0x1043124f 0
> 
> [verb]
> 0x20 0x500 0x45
> 0x20 0x4c4 0x29
> 0x20 0x500 0x35
> 0x20 0xc00 0x00
> 0x20 0x500 0x35
> 0x20 0x46f 0x3e
> 0x20 0x500 0x06
> 0x20 0x421 0x00
> 0x20 0x500 0x1a
> 0x20 0x400 0x21
> 0x20 0x500 0x26
> 0x20 0x400 0x8c
> 
> 
> Using this, my internal mic works, and keeps working after suspend/resume.

Maybe the pin setup for Dell multi headset doesn't match with yours.
There are a few other headset quirks, but they aren't exposed as
selectable via model option.  You need to patch the kernel.

For example, below is to use ALC269_FIXUP_HEADSET_MODE_NO_HP_MIC for
your device.  Does it work better?


Takashi

---
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 2542b15ae343..955bb7710c14 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -5139,6 +5139,7 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
 	SND_PCI_QUIRK(0x1043, 0x103f, "ASUS TX300", ALC282_FIXUP_ASUS_TX300),
 	SND_PCI_QUIRK(0x1043, 0x106d, "Asus K53BE", ALC269_FIXUP_LIMIT_INT_MIC_BOOST),
 	SND_PCI_QUIRK(0x1043, 0x115d, "Asus 1015E", ALC269_FIXUP_LIMIT_INT_MIC_BOOST),
+	SND_PCI_QUIRK(0x1043, 0x124f, "ASUS S551", ALC269_FIXUP_HEADSET_MODE_NO_HP_MIC),
 	SND_PCI_QUIRK(0x1043, 0x1427, "Asus Zenbook UX31E", ALC269VB_FIXUP_ASUS_ZENBOOK),
 	SND_PCI_QUIRK(0x1043, 0x1517, "Asus Zenbook UX31A", ALC269VB_FIXUP_ASUS_ZENBOOK_UX31A),
 	SND_PCI_QUIRK(0x1043, 0x16e3, "ASUS UX50", ALC269_FIXUP_STEREO_DMIC),