reproduce (this is a W=1 build):
        # https://github.com/jsarha/linux/commit/3e0b620a47e1670e4a3029ebc7f54da59d852799
        git remote add jsarha https://github.com/jsarha/linux
        git fetch --no-tags jsarha topic/chromeos-4.19-s0ix
        git checkout 3e0b620a47e1670e4a3029ebc7f54da59d852799
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/bridge/synopsys/