From c481fca3e68155459e9805dc8c303e012ccbee54 Mon Sep 17 00:00:00 2001 From: Matthew Ranostay Date: Mon, 7 Jan 2008 12:18:28 +0100 Subject: [PATCH] [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 Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela --- sound/pci/hda/patch_sigmatel.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c index a074155dd8..4e71bbaa19 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; -- 2.39.5