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media: Allow drivers to be built without V4L2

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When building the NVIDIA out-of-tree drivers against 3rd party Linux
kernels where V4L2 support is not be enabled by default, the camera
drivers fail to build. Although this is expected, it is preferred that
the driver can still be built but then fail when loaded. Update the
camera drivers to guard around the V4L2 functions so that the drivers
can still be built but will return an error where needed.

Bug 4119327

Change-Id: I3a1115e5f0451153831c396244c01d7525cb51a1
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2979254
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Jon Hunter
2023-09-12 16:45:47 +01:00
committed by mobile promotions
parent 84302c4c14
commit 79e8e9cf3a
6 changed files with 74 additions and 1 deletions
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6
drivers/media/platform/tegra/camera/tegracam_v4l2.c
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@@ -229,7 +229,11 @@ int tegracam_v4l2subdev_register(struct tegracam_device *tc_dev,
}
#endif
#if defined(CONFIG_V4L2_ASYNC)
return v4l2_async_register_subdev(sd);
#else
return -ENOTSUPP;
#endif
}
EXPORT_SYMBOL_GPL(tegracam_v4l2subdev_register);
@@ -244,7 +248,9 @@ void tegracam_v4l2subdev_unregister(struct tegracam_device *tc_dev)
sd = &s_data->subdev;
v4l2_ctrl_handler_free(s_data->ctrl_handler);
#if defined(CONFIG_V4L2_ASYNC)
v4l2_async_unregister_subdev(sd);
#endif
#if IS_ENABLED(CONFIG_MEDIA_CONTROLLER)
media_entity_cleanup(&sd->entity);
#endif