pi@bpi-iot-ros-ai:~$ cat /boot/bananapi/bpi-m2u/linux/uEnv.txt
bpi=bananapi
board=bpi-m2u
chip=r40
service=linux
kernel=uImage
#
kaddr=0x47000000
rdaddr=0x49000000
#
#

ahello=echo Banana Pi ${board} chip: $chip Service: $service

aboot=if fatload $device $partition $rdaddr ${bpi}/berryboot.img; then bootm $kaddr $rdaddr ; else bootm $kaddr; fi
aload_kernel=fatload $device $partition $kaddr ${bpi}/${board}/${service}/${kernel}

uenvcmd=run ahello aload_kernel aboot

#
# from sys_config.fex
#
#;output_type  (0:none; 1:lcd; 2:tv; 3:hdmi; 4:vga)
#;output_mode  (used for tv/hdmi output, 0:480i 1:576i 2:480p 3:576p 4:720p50 5:720p60 6:1080i50 7:1080i60 8:1080p24 9:1080p50 10:1080p60 11:pal 14:ntsc)
#

# ref. sys_config.fex, use default script.bin
#bootargs=enforcing=1 earlyprintk=sunxi-uart,0x01c28000 initcall_debug=0 console=ttyS0,115200 console=tty1 board=bpi-m2u loglevel=8 root=/dev/mmcblk0p2 rw rootwait  init=/init cma=256M bootmenutimeout=10 datadev=mmcblk0p2
bootargs=enforcing=1 initcall_debug=0 console=ttyS0,115200n8 console=tty1 no_console_suspend board=bpi-m2u loglevel=4 root=/dev/mmcblk0p2 rw rootwait  init=/init cma=256M panic=10 consoleblank=0 bootmenutimeout=10 datadev=mmcblk0p2

# output HDMI 1080P (type:3 mode:10)
#bootargs=enforcing=1 initcall_debug=0 console=ttyS0,115200n8 console=tty1 no_console_suspend board=bpi-m2u loglevel=4 root=/dev/mmcblk0p2 rw rootwait  init=/init cma=256M panic=10 consoleblank=0 bootmenutimeout=10 datadev=mmcblk0p2 disp.screen0_output_type=3 disp.screen0_output_mode=10 disp.screen1_output_type=3 disp.screen1_output_mode=10

# output HDMI 720P (type:3 mode:5)
#bootargs=enforcing=1 initcall_debug=0 console=ttyS0,115200n8 console=tty1 no_console_suspend board=bpi-m2u loglevel=4 root=/dev/mmcblk0p2 rw rootwait  init=/init cma=256M panic=10 consoleblank=0 bootmenutimeout=10 datadev=mmcblk0p2 disp.screen0_output_type=3 disp.screen0_output_mode=5 disp.screen1_output_type=3 disp.screen1_output_mode=5



# output HDMI 480P (type:3 mode:2)
#bootargs=enforcing=1 initcall_debug=0 console=ttyS0,115200n8 console=tty1 no_console_suspend board=bpi-m2u loglevel=4 root=/dev/mmcblk0p2 rw rootwait  init=/init cma=256M panic=10 consoleblank=0 bootmenutimeout=10 datadev=mmcblk0p2 disp.screen0_output_type=3 disp.screen0_output_mode=2 disp.screen1_output_type=3 disp.screen1_output_mode=2
pi@bpi-iot-ros-ai:~$