drm_writeback.h included a lot of nice kernel-doc comments.
Wire it up so the header file is included in the kernel-doc
generated documentation.
Added a few simple comments to the two structs so they
get picked up by kernel-doc.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Cc: Brian Starkey <brian.starkey@arm.com>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200406194746.26433-4-sam@ravnborg.org
 Writeback Connectors
 --------------------
 
+.. kernel-doc:: include/drm/drm_writeback.h
+  :internal:
+
 .. kernel-doc:: drivers/gpu/drm/drm_writeback.c
   :doc: overview
 
 
 #include <drm/drm_encoder.h>
 #include <linux/workqueue.h>
 
+/**
+ * struct drm_writeback_connector - DRM writeback connector
+ */
 struct drm_writeback_connector {
+       /**
+        * @base: base drm_connector object
+        */
        struct drm_connector base;
 
        /**
        char timeline_name[32];
 };
 
+/**
+ * struct drm_writeback_job - DRM writeback job
+ */
 struct drm_writeback_job {
        /**
         * @connector: