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ALSA: hda/ca0132: Fix DMic data rate for Alienware M17x R4 

The commentary says to use various parameters, and lays out what
the mapping is...  The code used a 32KHz rate when the comment
says that it needs to use a 48KHz rate.  And this has been the
case since day one.

On the Alienware M17x R4, the DMic used to have exceptionally quiet
pickup and a lot of noise.  Changing the data rate fixes both of
these issues.

Searching the kernel bug tracker for ca0132-related issues shows no
mention of this being an issue for other hardware, and I have no
other hardware to test with, so a quirk is used to limit the effect
to just the M17x R4.

Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
hifive-unleashed-5.1
Alastair Bridgewater 2018-06-15 21:56:20 -04:00 committed by Takashi Iwai
parent 5f8ddc6ee6
commit a57a46b932
1 changed files with 6 additions and 1 deletions
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7
sound/pci/hda/patch_ca0132.c
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@ -991,6 +991,7 @@ struct ca0132_spec {
enum {
QUIRK_NONE,
QUIRK_ALIENWARE,
QUIRK_ALIENWARE_M17XR4,
QUIRK_SBZ,
QUIRK_R3DI,
};
@ -1040,6 +1041,7 @@ static const struct hda_pintbl r3di_pincfgs[] = {
};
static const struct snd_pci_quirk ca0132_quirks[] = {
SND_PCI_QUIRK(0x1028, 0x057b, "Alienware M17x R4", QUIRK_ALIENWARE_M17XR4),
SND_PCI_QUIRK(0x1028, 0x0685, "Alienware 15 2015", QUIRK_ALIENWARE),
SND_PCI_QUIRK(0x1028, 0x0688, "Alienware 17 2015", QUIRK_ALIENWARE),
SND_PCI_QUIRK(0x1028, 0x0708, "Alienware 15 R2 2016", QUIRK_ALIENWARE),
@ -6130,7 +6132,10 @@ static void ca0132_init_dmic(struct hda_codec *codec)
* Bit 6: set to select Data2, clear for Data1
* Bit 7: set to enable DMic, clear for AMic
*/
val = 0x23;
if (spec->quirk == QUIRK_ALIENWARE_M17XR4)
val = 0x33;
else
val = 0x23;
/* keep a copy of dmic ctl val for enable/disable dmic purpuse */
spec->dmic_ctl = val;
snd_hda_codec_write(codec, spec->input_pins[0], 0,