1 files changed, 43 insertions, 0 deletions
diff --git a/sound/hda/intel-nhlt.c b/sound/hda/intel-nhlt.c
index 696a958d93e9..6d72a871bda0 100644
--- a/sound/hda/intel-nhlt.c
+++ b/sound/hda/intel-nhlt.c
@@ -343,3 +343,46 @@ intel_nhlt_get_endpoint_blob(struct device *dev, struct nhlt_acpi_table *nhlt,
 	return NULL;
 }
 EXPORT_SYMBOL(intel_nhlt_get_endpoint_blob);
+
+int intel_nhlt_ssp_device_type(struct device *dev, struct nhlt_acpi_table *nhlt,
+			       u8 virtual_bus_id)
+{
+	struct nhlt_endpoint *epnt;
+	int i;
+
+	if (!nhlt) {
+		dev_err(dev, "%s: NHLT table is missing (query for SSP%d)\n",
+			__func__, virtual_bus_id);
+		return -EINVAL;
+	}
+
+	epnt = (struct nhlt_endpoint *)nhlt->desc;
+	for (i = 0; i < nhlt->endpoint_count; i++) {
+		/* for SSP link the virtual bus id is the SSP port number */
+		if (epnt->linktype == NHLT_LINK_SSP &&
+		    epnt->virtual_bus_id == virtual_bus_id) {
+			dev_dbg(dev, "SSP%d: dev_type=%d\n", virtual_bus_id,
+				epnt->device_type);
+			return epnt->device_type;
+		}
+
+		epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
+	}
+
+	dev_err(dev, "%s: No match for SSP%d in NHLT table\n", __func__,
+		virtual_bus_id);
+
+	dev_dbg(dev, "Available endpoints:\n");
+	epnt = (struct nhlt_endpoint *)nhlt->desc;
+	for (i = 0; i < nhlt->endpoint_count; i++) {
+		dev_dbg(dev,
+			"%d: link_type: %d, vbus_id: %d, dir: %d, dev_type: %d\n",
+			i, epnt->linktype, epnt->virtual_bus_id,
+			epnt->direction, epnt->device_type);
+
+		epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
+	}
+
+	return -EINVAL;
+}
+EXPORT_SYMBOL(intel_nhlt_ssp_device_type);