reproduce:
        git remote add rockchip https://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git
        git fetch rockchip for-next
        git checkout rockchip/for-next
        b4 shazam https://lore.kernel.org/r/db605935ad21c4780b73db87605b52d30bc936a4.1700132457.git.mehdi.djait@bootlin.com
        # 1. reproduce by kismet
           # install kmax per https://github.com/paulgazz/kmax/blob/master/README.md
           kismet --linux-ksrc=linux --selectees CONFIG_VIDEO_V4L2_SUBDEV_API --selectors CONFIG_VIDEO_ROCKCHIP_CIF -a=x86_64
        # 2. reproduce by make
           # save the config file to linux source tree
           cd linux
           make ARCH=x86_64 olddefconfig