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[ALSA] hda: STAC927x VREF fix

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Some laptops incorrectly assume the front input jack as a line in
instead of a microphone in. Which in turn disables the voltage
reference, in which non-amplified input is not possible.  This patch
enables VREF80 for the input jack.

Signed-off-by: Matthew Ranostay <mranostay@embeddedalley.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Matthew Ranostay 2008-01-07 12:18:28 +01:00 committed by Jaroslav Kysela
parent 740eb8358f
commit c481fca3e6
1 changed files with 3 additions and 0 deletions
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3
sound/pci/hda/patch_sigmatel.c
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@ -3344,6 +3344,9 @@ static int patch_stac927x(struct hda_codec *codec)
spec->mixer = stac927x_mixer;
break;
case STAC_DELL_BIOS:
/* correct the front input jack as a mic */
stac92xx_set_config_reg(codec, 0x0e, 0x02a79130);
/* fallthru */
case STAC_DELL_3ST:
/* GPIO2 High = Enable EAPD */
spec->gpio_mask = spec->gpio_data = 0x00000004;