[alsa-devel] [PATCH v4 06/13] ALSA: hdac: add snd_hdac_ext_bus_link_power_up_all

[Vinod Koul]

We have an API for powering down all links, we need a similar one
for powering up links, so add for power up as well

Signed-off-by: Jayachandran B <jayachandran.b at intel.com>
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty at intel.com>
Signed-off-by: Vinod Koul <vinod.koul at intel.com>
---
 include/sound/hdaudio_ext.h         |  1 +
 sound/hda/ext/hdac_ext_controller.c | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/include/sound/hdaudio_ext.h b/include/sound/hdaudio_ext.h
index f3454950ee0b..07fa59237feb 100644
--- a/include/sound/hdaudio_ext.h
+++ b/include/sound/hdaudio_ext.h
@@ -147,6 +147,7 @@ struct hdac_ext_link {
 
 int snd_hdac_ext_bus_link_power_up(struct hdac_ext_link *link);
 int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link);
+int snd_hdac_ext_bus_link_power_up_all(struct hdac_ext_bus *ebus);
 int snd_hdac_ext_bus_link_power_down_all(struct hdac_ext_bus *ebus);
 void snd_hdac_ext_link_set_stream_id(struct hdac_ext_link *link,
 				 int stream);
diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c
index 1a55a781270d..548cc1e4114b 100644
--- a/sound/hda/ext/hdac_ext_controller.c
+++ b/sound/hda/ext/hdac_ext_controller.c
@@ -288,6 +288,27 @@ int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link)
 EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down);
 
 /**
+ * snd_hdac_ext_bus_link_power_up_all -power up all hda link
+ * @ebus: HD-audio extended bus
+ */
+int snd_hdac_ext_bus_link_power_up_all(struct hdac_ext_bus *ebus)
+{
+	struct hdac_ext_link *hlink = NULL;
+	int ret;
+
+	list_for_each_entry(hlink, &ebus->hlink_list, list) {
+		snd_hdac_updatel(hlink->ml_addr,
+				AZX_REG_ML_LCTL, 0, AZX_MLCTL_SPA);
+		ret = check_hdac_link_power_active(hlink, true);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_up_all);
+
+/**
  * snd_hdac_ext_bus_link_power_down_all -power down all hda link
  * @ebus: HD-audio extended bus
  */
-- 
1.9.1