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-rw-r--r--sound/hda/intel-nhlt.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/sound/hda/intel-nhlt.c b/sound/hda/intel-nhlt.c
index 696a958d93..088cff799e 100644
--- a/sound/hda/intel-nhlt.c
+++ b/sound/hda/intel-nhlt.c
@@ -343,3 +343,29 @@ 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)
+ 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);
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL(intel_nhlt_ssp_device_type);