Steps to set up libcamera for dev (with latest media_master) using virtme

libcamera_dev.md

• Follow https://libcamera.org/getting-started.html to install libcamera on your native machine.

• Clone latest media_tree using:

  git clone git://linuxtv.org/media_tree.git
  

• Install virtme:

  pip3 install --user git+https://github.com/ezequielgarcia/virtme.git
  

• Compile Kernel with Virtme:

  • cd media_tree
    virtme-configkernel --defconfig
    

  • Enable vimc/vivid/ etc as per requirement
  • Enable CONFIG_DRM_VIRTIO_GPU=y in kernel config
  • make -j8

• Run virtme (on native machine)

  • Use a variable to pass memory and CPUs to be used by QEMU to prevent Out of Memory error. Adjust the values accordingly.

    export MEM_CPU="-m 2G -smp 2"
    

  • Run virtme

     virtme-run --graphics --kdir $KDIR --kopt="console=ttyS0" --qemu-opts $MEM_CPU -vga virtio -serial mon:stdio
    

    where $KDIR is kernel directory's path

• To run qcam (in virtme):

  QT_QPA_PLATFORM=linuxfb /usr/local/bin/qcam 
  

virtme-run --graphics --kdir $KDIR --kopt="console=ttyS0" --qemu-opts $MEM_CPU -vga virtio -serial mon:stdio

You reference two variables here, KDIR and MEM_CPU ... how do you define those? What should they be?

Aha - sorry - you defined KDIR, but I can't see MEM_CPU

Sorry I missed that, it defines the resources one uses for virtme. I'll edit it right away.
Thanks!