ALSA: HDA: export process_unsol_events()

The SOF implementation does not rely on the hdac_bus library, however
for HDMI and HDaudio codec support it does need to deal with
unsolicited events. Instead of re-inventing the wheel, export this
symbol to reuse this part of the library directly.
Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/hdaudio.h

@@ -387,6 +387,7 @@ void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex);
 int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec);
 void snd_hdac_bus_remove_device(struct hdac_bus *bus,
 				struct hdac_device *codec);
+void snd_hdac_bus_process_unsol_events(struct work_struct *work);
 
 static inline void snd_hdac_codec_link_up(struct hdac_device *codec)
 {

sound/hda/hdac_bus.c

@@ -9,8 +9,6 @@
 #include <sound/hdaudio.h>
 #include "trace.h"
 
-static void 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,
@@ -37,7 +35,7 @@ int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
 	bus->io_ops = io_ops;
 	INIT_LIST_HEAD(&bus->stream_list);
 	INIT_LIST_HEAD(&bus->codec_list);
-	INIT_WORK(&bus->unsol_work, process_unsol_events);
+	INIT_WORK(&bus->unsol_work, snd_hdac_bus_process_unsol_events);
 	spin_lock_init(&bus->reg_lock);
 	mutex_init(&bus->cmd_mutex);
 	bus->irq = -1;
@@ -148,7 +146,7 @@ EXPORT_SYMBOL_GPL(snd_hdac_bus_queue_event);
 /*
  * process queued unsolicited events
  */
-static void process_unsol_events(struct work_struct *work)
+void snd_hdac_bus_process_unsol_events(struct work_struct *work)
 {
 	struct hdac_bus *bus = container_of(work, struct hdac_bus, unsol_work);
 	struct hdac_device *codec;
@@ -171,6 +169,7 @@ static void process_unsol_events(struct work_struct *work)
 			drv->unsol_event(codec, res);
 	}
 }
+EXPORT_SYMBOL_GPL(snd_hdac_bus_process_unsol_events);
 
 /**
  * snd_hdac_bus_add_device - Add a codec to bus