To fix pop noise when shutdown,the pop noise during shutdown
is the pmic cutoff power of codec without any notice.
Signed-off-by: jay.xu <xjq at rock-chips.com>
Signed-off-by: zhengxing <zhengxing at rock-chips.com>
Signed-off-by: Caesar Wang <wxt at rock-chips.com>
---
Changes in v3:
- modify the shutdown function before remove(..)
- fix the `Serien-cc`
Changes in v2:
- remove the dev_info(..)
- fix the comment style
- add the max98090_i2c_shutdown() in remove() fuction
sound/soc/codecs/max98090.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c
index b112b1c..3e33ef2 100644
--- a/sound/soc/codecs/max98090.c
+++ b/sound/soc/codecs/max98090.c
@@ -2605,8 +2605,24 @@ err_enable:
return ret;
}
+static void max98090_i2c_shutdown(struct i2c_client *i2c)
+{
+ struct max98090_priv *max98090 = dev_get_drvdata(&i2c->dev);
+
+ /*
+ * Enable volume smoothing, disable zero cross. This will cause
+ * a quick 40ms ramp to mute on shutdown.
+ */
+ regmap_write(max98090->regmap,
+ M98090_REG_LEVEL_CONTROL, M98090_VSENN_MASK);
+ regmap_write(max98090->regmap,
+ M98090_REG_DEVICE_SHUTDOWN, 0x00);
+ msleep(40);
+}
+
static int max98090_i2c_remove(struct i2c_client *client)
{
+ max98090_i2c_shutdown(client);
snd_soc_unregister_codec(&client->dev);
return 0;
}
@@ -2696,6 +2712,7 @@ static struct i2c_driver max98090_i2c_driver = {
.acpi_match_table = ACPI_PTR(max98090_acpi_match),
},
.probe = max98090_i2c_probe,
+ .shutdown = max98090_i2c_shutdown,
.remove = max98090_i2c_remove,
.id_table = max98090_i2c_id,
};
--
1.9.1
