[ALSA] oxygen: add SPDIF loopback control
Add a mixer control for the SPDIF loopback function.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/sound/pci/oxygen/oxygen_mixer.c b/sound/pci/oxygen/oxygen_mixer.c
index 0993c29..6b7420f 100644
--- a/sound/pci/oxygen/oxygen_mixer.c
+++ b/sound/pci/oxygen/oxygen_mixer.c
@@ -408,6 +408,37 @@
return 0;
}
+static int spdif_loopback_get(struct snd_kcontrol *ctl,
+ struct snd_ctl_elem_value *value)
+{
+ struct oxygen *chip = ctl->private_data;
+
+ value->value.integer.value[0] =
+ !!(oxygen_read32(chip, OXYGEN_SPDIF_CONTROL)
+ & OXYGEN_SPDIF_LOOPBACK);
+ return 0;
+}
+
+static int spdif_loopback_put(struct snd_kcontrol *ctl,
+ struct snd_ctl_elem_value *value)
+{
+ struct oxygen *chip = ctl->private_data;
+ u32 oldreg, newreg;
+ int changed;
+
+ spin_lock_irq(&chip->reg_lock);
+ oldreg = oxygen_read32(chip, OXYGEN_SPDIF_CONTROL);
+ if (value->value.integer.value[0])
+ newreg = oldreg | OXYGEN_SPDIF_LOOPBACK;
+ else
+ newreg = oldreg & ~OXYGEN_SPDIF_LOOPBACK;
+ changed = newreg != oldreg;
+ if (changed)
+ oxygen_write32(chip, OXYGEN_SPDIF_CONTROL, newreg);
+ spin_unlock_irq(&chip->reg_lock);
+ return changed;
+}
+
static int ac97_switch_get(struct snd_kcontrol *ctl,
struct snd_ctl_elem_value *value)
{
@@ -620,6 +651,13 @@
.info = spdif_info,
.get = spdif_input_default_get,
},
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = SNDRV_CTL_NAME_IEC958("Loopback ", NONE, SWITCH),
+ .info = snd_ctl_boolean_mono_info,
+ .get = spdif_loopback_get,
+ .put = spdif_loopback_put,
+ },
};
static const struct snd_kcontrol_new ac97_controls[] = {