diff options
| author | Jacopo Mondi <jacopo@jmondi.org> | 2021-01-29 11:16:12 +0000 |
|---|---|---|
| committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2021-02-05 00:05:26 +0200 |
| commit | f1b0c7f5e3f2d55c30934d1f2f9f417e0ff778ae (patch) | |
| tree | febd7f7bf1174a6f0219900b7f393119c927a749 /Documentation | |
| parent | e81f9046caa26b06098eaef93b825a08bb3a5564 (diff) | |
libcamera: camera_sensor: Make VBLANK mandatory
Add the V4L2_CID_VBLANK control to the list of mandatory controls
the sensor driver has to report and document the new requirement.
The vertical blanking control is used to calculate the frame duration.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/sensor_driver_requirements.rst | 6 |
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 --------------------- |