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drivers: video: sw_generator: convert to use the devicetree

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Make the video software generator a devicetree node, which allows enabling
several instances, and select it as chosen { zephyr,camera = &... }; node.
It can be enabled via a `video-sw-generator` snippet.

Signed-off-by: Josuah Demangeon <me@josuah.net>
This commit is contained in:
Josuah Demangeon 2025-04-18 00:02:43 +00:00 • committed by Benjamin Cabé
commit a3465f8f4d
16 changed files with 97 additions and 57 deletions
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snippets/video-sw-generator/README.rst Normal file
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.. _snippet-video-sw-generator:
Video Software Generator Snippet (video-sw-generator)
#####################################################
.. code-block:: console
west build -S video-sw-generator [...]
Overview
********
This snippet instantiate a fake video source generating a test pattern continuously
for test purpose. It is selected as the ``zephyr,camera`` :ref:`devicetree` chosen node.
Requirements
************
No hardware support is required besides sufficient memory for the video resolution
declared by :kconfig:option:`CONFIG_VIDEO_BUFFER_POOL_SZ_MAX`.

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snippets/video-sw-generator/snippet.yml Normal file
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name: video-sw-generator
append:
EXTRA_DTC_OVERLAY_FILE: video-sw-generator.overlay

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snippets/video-sw-generator/video-sw-generator.overlay Normal file
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/*
* Copyright The Zephyr Project Contributors
* SPDX-License-Identifier: Apache-2.0
*/
/ {
chosen {
zephyr,camera = &video_sw_generator;
};
video_sw_generator: video-sw-generator {
compatible = "zephyr,video-sw-generator";
};
};