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The CameraLens class abstracts camera lens and provides helper functions to ease interactions with them. Signed-off-by: Han-Lin Chen <hanlinchen@chromium.org> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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979 B
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27 lines
979 B
ReStructuredText
.. SPDX-License-Identifier: CC-BY-SA-4.0
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.. _lens-driver-requirements:
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Lens Driver Requirements
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========================
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libcamera handles lens devices in the CameraLens class and defines
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a consistent interface through its API towards other library components.
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The CameraLens class uses the V4L2 subdev kernel API to interface with the
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camera lens through a sub-device exposed to userspace by the lens driver.
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In order for libcamera to be fully operational and provide all the required
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information to interface with the camera lens to applications and pipeline
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handlers, a set of mandatory features the driver has to support has been defined.
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Mandatory Requirements
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----------------------
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The lens driver is assumed to be fully compliant with the V4L2 specification.
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The lens driver shall support the following V4L2 controls:
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* `V4L2_CID_FOCUS_ABSOLUTE`_
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.. _V4L2_CID_FOCUS_ABSOLUTE: https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/ext-ctrls-camera.html
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