sound: oxygen: add digital filter control
Add a control to select between sharp and slow roll-of filter responses
of the DACs.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/oxygen/oxygen.c b/sound/pci/oxygen/oxygen.c
index d12fd9e..3ad9eb0 100644
--- a/sound/pci/oxygen/oxygen.c
+++ b/sound/pci/oxygen/oxygen.c
@@ -352,6 +352,70 @@
value, GPIO_AK5385_DFS_MASK);
}
+static int rolloff_info(struct snd_kcontrol *ctl,
+ struct snd_ctl_elem_info *info)
+{
+ static const char *const names[2] = {
+ "Sharp Roll-off", "Slow Roll-off"
+ };
+
+ info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+ info->count = 1;
+ info->value.enumerated.items = 2;
+ if (info->value.enumerated.item >= 2)
+ info->value.enumerated.item = 1;
+ strcpy(info->value.enumerated.name, names[info->value.enumerated.item]);
+ return 0;
+}
+
+static int rolloff_get(struct snd_kcontrol *ctl,
+ struct snd_ctl_elem_value *value)
+{
+ struct oxygen *chip = ctl->private_data;
+ struct generic_data *data = chip->model_data;
+
+ value->value.enumerated.item[0] =
+ (data->ak4396_regs[0][AK4396_CONTROL_2] & AK4396_SLOW) != 0;
+ return 0;
+}
+
+static int rolloff_put(struct snd_kcontrol *ctl,
+ struct snd_ctl_elem_value *value)
+{
+ struct oxygen *chip = ctl->private_data;
+ struct generic_data *data = chip->model_data;
+ unsigned int i;
+ int changed;
+ u8 reg;
+
+ mutex_lock(&chip->mutex);
+ reg = data->ak4396_regs[0][AK4396_CONTROL_2];
+ if (value->value.enumerated.item[0])
+ reg |= AK4396_SLOW;
+ else
+ reg &= ~AK4396_SLOW;
+ changed = reg != data->ak4396_regs[0][AK4396_CONTROL_2];
+ if (changed) {
+ for (i = 0; i < 4; ++i)
+ ak4396_write(chip, i, AK4396_CONTROL_2, reg);
+ }
+ mutex_unlock(&chip->mutex);
+ return changed;
+}
+
+static const struct snd_kcontrol_new rolloff_control = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "DAC Filter Playback Enum",
+ .info = rolloff_info,
+ .get = rolloff_get,
+ .put = rolloff_put,
+};
+
+static int generic_mixer_init(struct oxygen *chip)
+{
+ return snd_ctl_add(chip->card, snd_ctl_new1(&rolloff_control, chip));
+}
+
static const DECLARE_TLV_DB_LINEAR(ak4396_db_scale, TLV_DB_GAIN_MUTE, 0);
static const struct oxygen_model model_generic = {
@@ -359,6 +423,7 @@
.longname = "C-Media Oxygen HD Audio",
.chip = "CMI8788",
.init = generic_init,
+ .mixer_init = generic_mixer_init,
.cleanup = generic_cleanup,
.resume = generic_resume,
.get_i2s_mclk = oxygen_default_i2s_mclk,