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| author | Jacopo Mondi <jacopo.mondi@ideasonboard.com> | 2022-11-24 13:12:20 +0100 |
|---|---|---|
| committer | Jacopo Mondi <jacopo.mondi@ideasonboard.com> | 2023-01-30 12:04:17 +0100 |
| commit | bb35ac92e4e0f8304b81c659f434e8bf4d10ddec (patch) | |
| tree | 2eecef0668849e96f6a8a8285d7e43e7e932ad80 | |
| parent | 517017c49aac9b6841bf490a01c650c29afeb665 (diff) | |
documentation: sensor_drivers: Document H/V flip
Briefly document the optional requirement support for H/V flip controls.
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: David Plowman <david.plowman@raspberrypi.com>
| -rw-r--r-- | Documentation/sensor_driver_requirements.rst | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/sensor_driver_requirements.rst b/Documentation/sensor_driver_requirements.rst index 3abc8f35..0e516b34 100644 --- a/Documentation/sensor_driver_requirements.rst +++ b/Documentation/sensor_driver_requirements.rst @@ -62,6 +62,18 @@ The sensor driver should support the following V4L2 controls: The controls are used to register the camera location and rotation. +In order to support rotating the image the sensor driver should support + +* `V4L2_CID_HFLIP`_ +* `V4L2_CID_VFLIP`_ + +.. _V4L2_CID_HFLIP: https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/control.html +.. _V4L2_CID_VFLIP: https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/control.html + +The controls must be writable from userspace. In case of a RAW Bayer sensors, +drivers should correctly report if vertical/horizontal flips modify the Bayer +pattern ordering by reporting the `V4L2_CTRL_FLAG_MODIFY_LAYOUT` control flag. + The sensor driver should implement support for the V4L2 Selection API, specifically it should implement support for the `VIDIOC_SUBDEV_G_SELECTION`_ ioctl with support for the following selection |