reproduce:
        # https://github.com/krzk/linux/commit/dc3f7215cca7f40f995b5349e5bd9b4f7fcbeb12
        git remote add krzk-github https://github.com/krzk/linux
        git fetch --no-tags krzk-github b4/sm8750-display-dts-and-panel
        git checkout dc3f7215cca7f40f995b5349e5bd9b4f7fcbeb12
        # choose either of the following two methods to reproduce the issue
        # 1. reproduce by kismet
           # install kmax per https://github.com/paulgazz/kmax/blob/master/README.md
           kismet --linux-ksrc=linux --selectees CONFIG_REGMAP_SPI --selectors CONFIG_DRM_PANEL_NOVATEK_NT37801 -a=openrisc
        # 2. reproduce by make
           cd linux
           # download the config file from the "config:" link in the report, and save it as .config
           make ARCH=openrisc olddefconfig