diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index bcc76ce1afa6e4ebb79d84096a1796f29c4440e2..a87f41c9224385f71503e73fd8c39d4bc092c09a 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4109,4 +4109,11 @@
 #define  DDI_PORT_WIDTH_X4				(3<<1)
 #define  DDI_INIT_DISPLAY_DETECTED		(1<<0)
 
+/* DDI Buffer Translations */
+#define DDI_BUF_TRANS_A				0x64E00
+#define DDI_BUF_TRANS_B				0x64E60
+#define DDI_BUF_TRANS(port) _PORT(port, \
+					DDI_BUF_TRANS_A, \
+					DDI_BUF_TRANS_B)
+
 #endif /* _I915_REG_H_ */