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-rw-r--r--Documentation/DocBook/drm.tmpl1
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/DocBook/drm.tmpl b/Documentation/DocBook/drm.tmpl
index 1d3756d3176c..55923d00bd52 100644
--- a/Documentation/DocBook/drm.tmpl
+++ b/Documentation/DocBook/drm.tmpl
@@ -3386,6 +3386,7 @@ void (*disable_vblank) (struct drm_device *dev, int crtc);</synopsis>
by scheduling a timer. The delay is accessible through the vblankoffdelay
module parameter or the <varname>drm_vblank_offdelay</varname> global
variable and expressed in milliseconds. Its default value is 5000 ms.
+ Zero means never disable, and a negative value means disable immediately.
</para>
<para>
When a vertical blanking interrupt occurs drivers only need to call the
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