+/**
+ * Check if HDMI vendor specific data block is present in CEA block
+ * @param info CEA extension block
+ * @return true if block is found
+ */
+static bool cea_is_hdmi_vsdb_present(struct edid_cea861_info *info)
+{
+ u8 end, i = 0;
+
+ /* check for end of data block */
+ end = info->dtd_offset;
+ if (end == 0)
+ end = sizeof(info->data);
+ if (end < 4 || end > sizeof(info->data))
+ return false;
+ end -= 4;
+
+ while (i < end) {
+ /* Look for vendor specific data block of appropriate size */
+ if ((EDID_CEA861_DB_TYPE(*info, i) == EDID_CEA861_DB_VENDOR) &&
+ (EDID_CEA861_DB_LEN(*info, i) >= 5)) {
+ u8 *db = &info->data[i + 1];
+ u32 oui = db[0] | (db[1] << 8) | (db[2] << 16);
+
+ if (oui == HDMI_IEEE_OUI)
+ return true;
+ }
+ i += EDID_CEA861_DB_LEN(*info, i) + 1;
+ }
+
+ return false;
+}
+