# File size of the on-disk uncompressed firmware

dd status=none bs=4k count=1300K iflag=count_bytes if=/dev/mtd0 | md5sum
xzcat /usr/share/hwm-bw-rk3399/bootloader-firmware/rk3399_rockpro64-spi-idbloader.img.xz | \
  dd status=none bs=4k count=1300K iflag=count_bytes | md5sum