[PATCH v2 10/18] ASoC: SOF: Intel: hda-mlink: add helper to return sublink count

[Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>]

From: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>

This is needed for SoundWire integration.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Rander Wang <rander.wang@xxxxxxxxx>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
---
 include/sound/hda-mlink.h       |  5 +++++
 sound/soc/sof/intel/hda-mlink.c | 12 ++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/include/sound/hda-mlink.h b/include/sound/hda-mlink.h
index c47008a603d0..d7f65cb6e175 100644
--- a/include/sound/hda-mlink.h
+++ b/include/sound/hda-mlink.h
@@ -13,6 +13,8 @@ struct hdac_bus;
 int hda_bus_ml_init(struct hdac_bus *bus);
 void hda_bus_ml_free(struct hdac_bus *bus);
 
+int hdac_bus_eml_get_count(struct hdac_bus *bus, bool alt, int elid);
+
 int hdac_bus_eml_power_up(struct hdac_bus *bus, bool alt, int elid, int sublink);
 int hdac_bus_eml_power_up_unlocked(struct hdac_bus *bus, bool alt, int elid, int sublink);
 
@@ -34,6 +36,9 @@ hda_bus_ml_init(struct hdac_bus *bus) { return 0; }
 
 static inline void hda_bus_ml_free(struct hdac_bus *bus) { }
 
+static inline int
+hdac_bus_eml_get_count(struct hdac_bus *bus, bool alt, int elid) { return 0; }
+
 static inline int
 hdac_bus_eml_power_up(struct hdac_bus *bus, bool alt, int elid, int sublink)
 {
diff --git a/sound/soc/sof/intel/hda-mlink.c b/sound/soc/sof/intel/hda-mlink.c
index 5045c10bed76..02743c342f28 100644
--- a/sound/soc/sof/intel/hda-mlink.c
+++ b/sound/soc/sof/intel/hda-mlink.c
@@ -328,6 +328,18 @@ find_ext2_link(struct hdac_bus *bus, bool alt, int elid)
 	return NULL;
 }
 
+int hdac_bus_eml_get_count(struct hdac_bus *bus, bool alt, int elid)
+{
+	struct hdac_ext2_link *h2link;
+
+	h2link = find_ext2_link(bus, alt, elid);
+	if (!h2link)
+		return 0;
+
+	return h2link->slcount;
+}
+EXPORT_SYMBOL_NS(hdac_bus_eml_get_count, SND_SOC_SOF_HDA_MLINK);
+
 static int hdac_bus_eml_power_up_base(struct hdac_bus *bus, bool alt, int elid, int sublink,
 				      bool eml_lock)
 {
-- 
2.40.0