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-rw-r--r--Documentation/sensor_driver_requirements.rst6
1 files changed, 4 insertions, 2 deletions
diff --git a/Documentation/sensor_driver_requirements.rst b/Documentation/sensor_driver_requirements.rst
index 6dcd4e68..590797f0 100644
--- a/Documentation/sensor_driver_requirements.rst
+++ b/Documentation/sensor_driver_requirements.rst
@@ -27,18 +27,20 @@ The sensor driver shall support the following V4L2 controls:
* `V4L2_CID_EXPOSURE`_
* `V4L2_CID_HBLANK`_
* `V4L2_CID_PIXEL_RATE`_
+* `V4L2_CID_VBLANK`_
.. _V4L2_CID_EXPOSURE: https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/control.html
.. _V4L2_CID_HBLANK: https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/ext-ctrls-image-source.html
.. _V4L2_CID_PIXEL_RATE: https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/ext-ctrls-image-process.html
+.. _V4L2_CID_VBLANK: https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/ext-ctrls-image-source.html
While V4L2 doesn't specify a unit for the `EXPOSURE` control, libcamera requires
it to be expressed as a number of image lines. Camera sensor drivers that do not
comply with this requirement will need to be adapted or will produce incorrect
results.
-The `HBLANK` and `PIXEL_RATE` controls are used to compute the sensor output
-timings.
+The `HBLANK`, `PIXEL_RATE` and `VBLANK` controls are used to compute the sensor
+output timings.
Optional Requirements
---------------------