diff --git a/Documentation/gpu/amdgpu/display/dcn-blocks.rst b/Documentation/gpu/amdgpu/display/dcn-blocks.rst
index 5ba3c04c1db0..a3fbd3ea028b 100644
--- a/Documentation/gpu/amdgpu/display/dcn-blocks.rst
+++ b/Documentation/gpu/amdgpu/display/dcn-blocks.rst
@@ -64,3 +64,15 @@ OPP
 
 .. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/opp.h
    :internal:
+
+DIO
+---
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.h
+   :doc: overview
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.h
+   :export:
+
+.. kernel-doc:: drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.h
+   :internal:
diff --git a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.h b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.h
index f4633d3cf9b9..a1f72fe378ee 100644
--- a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.h
+++ b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio.h
@@ -22,6 +22,16 @@
  * Authors: AMD
  *
  */
+
+/**
+ * DOC: overview
+ *
+ * Display Input Output (DIO), is the display input and output unit in DCN. It
+ * includes output encoders to support different display output, like
+ * DisplayPort, HDMI, DVI interface, and others. It also includes the control
+ * and status channels for these interfaces.
+ */
+
 #ifndef __LINK_HWSS_DIO_H__
 #define __LINK_HWSS_DIO_H__