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[ALSA] ice1724 - Add PCM Playback Switch to Revo 7.1

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This patch adds the support of mute for front channels of M-Audio
Revolution 7.1 (the DAC AK4381 features a mute bit).

Signed-off-by: Pavel Hofman <dustin@seznam.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Pavel Hofman
2007-05-19 17:21:04 +02:00
committed by Jaroslav Kysela
parent 959047431a
commit ea7cfcdfe6
3 changed files with 29 additions and 3 deletions
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24
sound/i2c/other/ak4xxx-adda.c
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@@ -481,8 +481,8 @@ static int ak4xxx_switch_get(struct snd_kcontrol *kcontrol,
int addr = AK_GET_ADDR(kcontrol->private_value);
int shift = AK_GET_SHIFT(kcontrol->private_value);
int invert = AK_GET_INVERT(kcontrol->private_value);
unsigned char val = snd_akm4xxx_get(ak, chip, addr);
/* we observe the (1<<shift) bit only */
unsigned char val = snd_akm4xxx_get(ak, chip, addr) & (1<<shift);
if (invert)
val = ! val;
ucontrol->value.integer.value[0] = (val & (1<<shift)) != 0;
@@ -585,6 +585,26 @@ static int build_dac_controls(struct snd_akm4xxx *ak)
mixer_ch = 0;
for (idx = 0; idx < ak->num_dacs; ) {
/* mute control for Revolution 7.1 - AK4381 */
if (ak->type == SND_AK4381
&& ak->dac_info[mixer_ch].switch_name) {
memset(&knew, 0, sizeof(knew));
knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
knew.count = 1;
knew.access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
knew.name = ak->dac_info[mixer_ch].switch_name;
knew.info = ak4xxx_switch_info;
knew.get = ak4xxx_switch_get;
knew.put = ak4xxx_switch_put;
knew.access = 0;
/* register 1, bit 0 (SMUTE): 0 = normal operation,
1 = mute */
knew.private_value =
AK_COMPOSE(idx/2, 1, 0, 0) | AK_INVERT;
err = snd_ctl_add(ak->card, snd_ctl_new1(&knew, ak));
if (err < 0)
return err;
}
memset(&knew, 0, sizeof(knew));
if (! ak->dac_info || ! ak->dac_info[mixer_ch].name) {
knew.name = "DAC Volume";