1 files changed, 37 insertions, 0 deletions
diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c
index b0c0ef824d7d..a9bd39b93697 100644
--- a/sound/hda/ext/hdac_ext_controller.c
+++ b/sound/hda/ext/hdac_ext_controller.c
@@ -332,3 +332,40 @@ int snd_hdac_ext_bus_link_put(struct hdac_bus *bus,
 	return ret;
 }
 EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_put);
+
+static void hdac_ext_codec_link_up(struct hdac_device *codec)
+{
+	const char *devname = dev_name(&codec->dev);
+	struct hdac_ext_link *hlink =
+		snd_hdac_ext_bus_get_link(codec->bus, devname);
+
+	if (hlink)
+		snd_hdac_ext_bus_link_get(codec->bus, hlink);
+}
+
+static void hdac_ext_codec_link_down(struct hdac_device *codec)
+{
+	const char *devname = dev_name(&codec->dev);
+	struct hdac_ext_link *hlink =
+		snd_hdac_ext_bus_get_link(codec->bus, devname);
+
+	if (hlink)
+		snd_hdac_ext_bus_link_put(codec->bus, hlink);
+}
+
+void snd_hdac_ext_bus_link_power(struct hdac_device *codec, bool enable)
+{
+	struct hdac_bus *bus = codec->bus;
+	bool oldstate = test_bit(codec->addr, &bus->codec_powered);
+
+	if (enable == oldstate)
+		return;
+
+	snd_hdac_bus_link_power(codec, enable);
+
+	if (enable)
+		hdac_ext_codec_link_up(codec);
+	else
+		hdac_ext_codec_link_down(codec);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power);