Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Canaan Inc./K210/DVP/axi#0x0
gm_mlen=byte1
AXI Register
GM_MLEN
0 (byte1): GM_MLEN_1BYTE
3 (byte4): GM_MLEN_4BYTE
https://github.com/cmsis-svd/cmsis-svd-data