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authorPavel Hofman <dustin@seznam.cz>2007-05-19 17:21:04 +0200
committerJaroslav Kysela <perex@suse.cz>2007-07-20 11:11:18 +0200
commitea7cfcdfe6439cd98816da9d339a6bc9032d2084 (patch)
tree0192cef9e2210f8aaae739c3471c174a8899f8cc /sound/i2c
parent959047431a9e65f6ae25705e77a8e460a1aa04c0 (diff)
downloadlinux-linaro-stable-ea7cfcdfe6439cd98816da9d339a6bc9032d2084.tar.gz
[ALSA] ice1724 - Add PCM Playback Switch to Revo 7.1
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>
Diffstat (limited to 'sound/i2c')
-rw-r--r--sound/i2c/other/ak4xxx-adda.c24
1 files changed, 22 insertions, 2 deletions
diff --git a/sound/i2c/other/ak4xxx-adda.c b/sound/i2c/other/ak4xxx-adda.c
index 8805110017a7..fd335159f849 100644
--- a/sound/i2c/other/ak4xxx-adda.c
+++ b/sound/i2c/other/ak4xxx-adda.c
@@ -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";