diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index 5881fad..9b9bf94 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -155,7 +155,22 @@
 #define DRM_EDID_INPUT_SEPARATE_SYNCS  (1 << 3)
 #define DRM_EDID_INPUT_BLANK_TO_BLACK  (1 << 4)
 #define DRM_EDID_INPUT_VIDEO_LEVEL     (3 << 5)
-#define DRM_EDID_INPUT_DIGITAL         (1 << 7) /* bits below must be zero if set */
+#define DRM_EDID_INPUT_DIGITAL         (1 << 7)
+#define DRM_EDID_DIGITAL_DEPTH_MASK    (7 << 4)
+#define DRM_EDID_DIGITAL_DEPTH_UNDEF   (0 << 4)
+#define DRM_EDID_DIGITAL_DEPTH_6       (1 << 4)
+#define DRM_EDID_DIGITAL_DEPTH_8       (2 << 4)
+#define DRM_EDID_DIGITAL_DEPTH_10      (3 << 4)
+#define DRM_EDID_DIGITAL_DEPTH_12      (4 << 4)
+#define DRM_EDID_DIGITAL_DEPTH_14      (5 << 4)
+#define DRM_EDID_DIGITAL_DEPTH_16      (6 << 4)
+#define DRM_EDID_DIGITAL_DEPTH_RSVD    (7 << 4)
+#define DRM_EDID_DIGITAL_TYPE_UNDEF    (0)
+#define DRM_EDID_DIGITAL_TYPE_DVI      (1)
+#define DRM_EDID_DIGITAL_TYPE_HDMI_A   (2)
+#define DRM_EDID_DIGITAL_TYPE_HDMI_B   (3)
+#define DRM_EDID_DIGITAL_TYPE_MDDI     (4)
+#define DRM_EDID_DIGITAL_TYPE_DP       (5)
 
 #define DRM_EDID_FEATURE_DEFAULT_GTF      (1 << 0)
 #define DRM_EDID_FEATURE_PREFERRED_TIMING (1 << 1)