[ALSA] hda: STAC927x VREF fix
authorMatthew Ranostay <mranostay@embeddedalley.com>
Mon, 7 Jan 2008 11:18:28 +0000 (12:18 +0100)
committerJaroslav Kysela <perex@perex.cz>
Thu, 31 Jan 2008 16:29:45 +0000 (17:29 +0100)
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>
sound/pci/hda/patch_sigmatel.c

index a074155dd8d54a335c43ce2bbba794e801d34d14..4e71bbaa195479c2b63ba822529ada314e1690ca 100644 (file)
@@ -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;