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Commit 02856b56 authored by Jaya Kumar's avatar Jaya Kumar Committed by Jaroslav Kysela
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[ALSA] AD1888 mixer controls for DC mode 



This patch adds two mixer controls. The V_REFOUT enable is a
documented register that couples the microphone input lines
to the V_REFOUT DC source. The High Pass Filter enable in the
AC97_AD_TEST2 (0x5c) is an undocumented register provided by
Miller Puckette via Analog Devices that enables the AD codec
to apply a high pass filter to the input.

Signed-off-by: default avatarJaya Kumar <jayakumar.alsa@gmail.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarJaroslav Kysela <perex@suse.cz>
parent 02ada9c1

include/sound/ac97_codec.h

+1 −0
Original line number Diff line number Diff line
@@ -265,6 +265,7 @@ 


/* specific - Analog Devices */

#define AC97_AD_TEST		0x5a	/* test register */

#define AC97_AD_TEST2		0x5c	/* undocumented test register 2 */

#define AC97_AD_CODEC_CFG	0x70	/* codec configuration */

#define AC97_AD_JACK_SPDIF	0x72	/* Jack Sense & S/PDIF */

#define AC97_AD_SERIAL_CFG	0x74	/* Serial Configuration */

sound/pci/ac97/ac97_patch.c

+2 −0
Original line number Diff line number Diff line
@@ -1824,6 +1824,8 @@ static const struct snd_kcontrol_new snd_ac97_ad1888_controls[] = { 
		.get = snd_ac97_ad1888_lohpsel_get,

		.put = snd_ac97_ad1888_lohpsel_put

	},

	AC97_SINGLE("V_REFOUT Enable", AC97_AD_MISC, 2, 1, 1),

	AC97_SINGLE("High Pass Filter Enable", AC97_AD_TEST2, 12, 1, 1),

	AC97_SINGLE("Spread Front to Surround and Center/LFE", AC97_AD_MISC, 7, 1, 0),

	{

		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,