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diff --git a/va/va_drmcommon.h b/va/va_drmcommon.h
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+/*
+ * va_drmcommon.h - Common utilities for DRM-based drivers
+ *
+ * Copyright (c) 2012 Intel Corporation. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef VA_DRM_COMMON_H
+#define VA_DRM_COMMON_H
+
+/** \brief DRM authentication type. */
+enum {
+    /** \brief Disconnected. */
+    VA_DRM_AUTH_NONE    = 0,
+    /**
+     * \brief Connected. Authenticated with DRI1 protocol.
+     *
+     * @deprecated
+     * This is a deprecated authentication type. All DRI-based drivers have
+     * been migrated to use the DRI2 protocol. Newly written drivers shall
+     * use DRI2 protocol only, or a custom authentication means. e.g. opt
+     * for authenticating on the VA driver side, instead of libva side.
+     */
+    VA_DRM_AUTH_DRI1    = 1,
+    /**
+     * \brief Connected. Authenticated with DRI2 protocol.
+     *
+     * This is only useful to VA/X11 drivers. The libva-x11 library provides
+     * a helper function VA_DRI2Authenticate() for authenticating the
+     * connection. However, DRI2 conformant drivers don't need to call that
+     * function since authentication happens on the libva side, implicitly.
+     */
+    VA_DRM_AUTH_DRI2    = 2,
+    /**
+     * \brief Connected. Authenticated with some alternate raw protocol.
+     *
+     * This authentication mode is mainly used in non-VA/X11 drivers.
+     * Authentication happens through some alternative method, at the
+     * discretion of the VA driver implementation.
+     */
+    VA_DRM_AUTH_CUSTOM  = 3
+};
+
+/** \brief Base DRM state. */
+struct drm_state {
+    /** \brief DRM connection descriptor. */
+    int         fd;
+    /** \brief DRM authentication type. */
+    int         auth_type;
+};
+
+#endif /* VA_DRM_COMMON_H */