daedalus-v4l2/kernel

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)

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.