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authorMatthew Ranostay <mranostay@embeddedalley.com>2008-01-07 12:18:28 +0100
committerJaroslav Kysela <perex@perex.cz>2008-01-31 17:29:45 +0100
commitc481fca3e68155459e9805dc8c303e012ccbee54 (patch)
treed10ca3c86fe311671732cc8d66f5b6ab7d90593f /sound/pci/hda/patch_sigmatel.c
parent740eb8358f2bf337fd4ec62abb5b8cca7c652e5a (diff)
[ALSA] hda: STAC927x VREF fix
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>
Diffstat (limited to 'sound/pci/hda/patch_sigmatel.c')
-rw-r--r--sound/pci/hda/patch_sigmatel.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index a074155dd8d..4e71bbaa195 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -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;