3 files changed, 74 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);
diff --git a/sound/hda/hdac_bus.c b/sound/hda/hdac_bus.c
index 9766f6af8743..71db8592b33d 100644
--- a/sound/hda/hdac_bus.c
+++ b/sound/hda/hdac_bus.c
@@ -17,6 +17,7 @@ static void snd_hdac_bus_process_unsol_events(struct work_struct *work);
 static const struct hdac_bus_ops default_ops = {
 	.command = snd_hdac_bus_send_cmd,
 	.get_response = snd_hdac_bus_get_response,
+	.link_power = snd_hdac_bus_link_power,
 };
 
 /**
@@ -264,3 +265,25 @@ void snd_hdac_aligned_write(unsigned int val, void __iomem *addr,
 }
 EXPORT_SYMBOL_GPL(snd_hdac_aligned_write);
 #endif /* CONFIG_SND_HDA_ALIGNED_MMIO */
+
+void snd_hdac_codec_link_up(struct hdac_device *codec)
+{
+	struct hdac_bus *bus = codec->bus;
+
+	if (bus->ops->link_power)
+		bus->ops->link_power(codec, true);
+	else
+		snd_hdac_bus_link_power(codec, true);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_codec_link_up);
+
+void snd_hdac_codec_link_down(struct hdac_device *codec)
+{
+	struct hdac_bus *bus = codec->bus;
+
+	if (bus->ops->link_power)
+		bus->ops->link_power(codec, false);
+	else
+		snd_hdac_bus_link_power(codec, false);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_codec_link_down);
diff --git a/sound/hda/hdac_controller.c b/sound/hda/hdac_controller.c
index b98449fd92f3..062da7a7a586 100644
--- a/sound/hda/hdac_controller.c
+++ b/sound/hda/hdac_controller.c
@@ -648,3 +648,17 @@ void snd_hdac_bus_free_stream_pages(struct hdac_bus *bus)
 		snd_dma_free_pages(&bus->posbuf);
 }
 EXPORT_SYMBOL_GPL(snd_hdac_bus_free_stream_pages);
+
+/**
+ * snd_hdac_bus_link_power - power up/down codec link
+ * @codec: HD-audio device
+ * @enable: whether to power-up the link
+ */
+void snd_hdac_bus_link_power(struct hdac_device *codec, bool enable)
+{
+	if (enable)
+		set_bit(codec->addr, &codec->bus->codec_powered);
+	else
+		clear_bit(codec->addr, &codec->bus->codec_powered);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_bus_link_power);