diff --git a/include/edid.h b/include/edid.h
index 8b022fa..a9f2f3d 100644
--- a/include/edid.h
+++ b/include/edid.h
@@ -19,6 +19,9 @@
 #define EDID_SIZE	128
 #define EDID_EXT_SIZE	256
 
+/* OUI of HDMI vendor specific data block */
+#define HDMI_IEEE_OUI 0x000c03
+
 #define GET_BIT(_x, _pos) \
 	(((_x) >> (_pos)) & 1)
 #define GET_BITS(_x, _pos_msb, _pos_lsb) \
@@ -234,6 +237,13 @@
 	unsigned char checksum;
 } __attribute__ ((__packed__));
 
+enum edid_cea861_db_types {
+	EDID_CEA861_DB_AUDIO = 0x01,
+	EDID_CEA861_DB_VIDEO = 0x02,
+	EDID_CEA861_DB_VENDOR = 0x03,
+	EDID_CEA861_DB_SPEAKER = 0x04,
+};
+
 struct edid_cea861_info {
 	unsigned char extension_tag;
 #define EDID_CEA861_EXTENSION_TAG	0x02
@@ -251,6 +261,10 @@
 #define EDID_CEA861_DTD_COUNT(_x) \
 	GET_BITS(((_x).dtd_count), 3, 0)
 	unsigned char data[124];
+#define EDID_CEA861_DB_TYPE(_x, offset) \
+	GET_BITS((_x).data[offset], 7, 5)
+#define EDID_CEA861_DB_LEN(_x, offset) \
+	GET_BITS((_x).data[offset], 4, 0)
 } __attribute__ ((__packed__));
 
 /**