drm/doc: Document drm_helper_resume_force_mode

Stumbled over while reviewing all occurences in the DRM doc talking
about suspend/resume.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 5 insertions, 2 deletions

diff --git a/Documentation/DocBook/drm.tmpl b/Documentation/DocBook/drm.tmpl
index 26539ee3c63e..8e1052434bab 100644
--- a/Documentation/DocBook/drm.tmpl
+++ b/Documentation/DocBook/drm.tmpl
@@ -1151,8 +1151,11 @@ int max_width, max_height;</synopsis>
             This operation is called with the mode config lock held.
           </para>
           <note><para>
-            FIXME: How should set_config interact with DPMS? If the CRTC is
-            suspended, should it be resumed?
+            Note that the drm core has no notion of restoring the mode setting
+            state after resume, since all resume handling is in the full
+            responsibility of the driver. The common mode setting helper library
+            though provides a helper which can be used for this:
+            <function>drm_helper_resume_force_mode</function>.
           </para></note>
         </sect4>
         <sect4>