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libcamera: v4l2_subdevice: Update to the new kernel routing API

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The subdev embedded data support series includes a change to the
VIDIOC_SUBDEV_G_ROUTING and VIDIOC_SUBDEV_S_ROUTING ioctls that impacts
the userspace API.

Update to the new API, while preserving backward compatibility to ease
the transition. Document the backward compatibility to only be supported
for two kernel releases. As the routing API isn't enabled in any
upstream kernel yet, users of the API need kernel patches, and are
expected to be able to upgrade quickly.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2024-02-28 22:30:22 +02:00
parent 70d553812e
commit 6cd17515ff
2 changed files with 121 additions and 4 deletions
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3
include/libcamera/internal/v4l2_subdevice.h
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@ -176,6 +176,9 @@ private:
std::vector<SizeRange> enumPadSizes(const Stream &stream,
unsigned int code);
int getRoutingLegacy(Routing *routing, Whence whence);
int setRoutingLegacy(Routing *routing, Whence whence);
const MediaEntity *entity_;
std::string model_;