From: Matthew Ranostay <mranostay@embeddedalley.com>
Date: Mon, 7 Jan 2008 11:18:28 +0000 (+0100)
Subject: [ALSA] hda: STAC927x VREF fix
X-Git-Tag: v2.6.25-rc1~1127^2~163
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c481fca3e68155459e9805dc8c303e012ccbee54;p=linux-2.6

[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>
---

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;