# kernel/ — daedalus-v4l2 Linux kernel module

Out-of-tree kernel module providing a V4L2 stateless decoder
device that forwards work to a userspace daemon.

## Status

Scaffold only. Phase 8.1 not yet started.

## Build (when implemented)

```sh
make -C /lib/modules/$(uname -r)/build M=$(pwd)
sudo insmod daedalus_v4l2.ko
v4l2-ctl --list-devices  # confirm /dev/videoNN appears
```

## Layout (planned)

- `Makefile` — kbuild stub
- `daedalus_v4l2_main.c` — module init + V4L2 device registration
- `daedalus_v4l2_chardev.c` — `/dev/daedalus-v4l2` chardev for
  daemon communication
- `daedalus_v4l2_v4l2.c` — V4L2 ioctl dispatch (stateless controls)

## License

GPLv2. Required for kernel module symbol compatibility.

## Phase 8.1 starting point

Minimal example: register a /dev/videoNN that returns -ENOSYS on
every ioctl. Validates that the kernel build works and
v4l2-ctl can see the device.