[PATCH 8/9] media: docs: v4l2-controls: document file to include

[Luca Ceresoli]

The tutorial in this section is almost complete, add the one missing bit.

Signed-off-by: Luca Ceresoli <luca@xxxxxxxxxxxxxxxx>
---
 Documentation/media/kapi/v4l2-controls.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/media/kapi/v4l2-controls.rst b/Documentation/media/kapi/v4l2-controls.rst
index 45541e05a0e7..407617b1d0ce 100644
--- a/Documentation/media/kapi/v4l2-controls.rst
+++ b/Documentation/media/kapi/v4l2-controls.rst
@@ -50,6 +50,10 @@ Basic usage for V4L2 and sub-device drivers
 
 1) Prepare the driver:
 
+.. code-block:: c
+
+	#include <media/v4l2-ctrls.h>
+
 1.1) Add the handler to your driver's top-level struct:
 
 For V4L2 drivers:
-- 
2.21.0