Booting is possible.
Open the TV box, connect the UART. The speed is 921600.
Connect the power supply.
In the terminal, press the space key to stop the boot.
Execute Commands:
setenv rootopt=BOOT_IMAGE=kernel.img boot=LABEL=COREELEC disk=LABEL=STORAGE
setenv addbootargs=setenv bootargs "${bootargs} ${rootopt}"
setenv bootfromusb=usb start; if fatload usb 0 ${loadaddr_kernel} kernel.img; then if fatload usb 0 ${dtb_mem_addr} dtb.img; then bootm ${loadaddr_kernel}; fi; fi; if fatload usb 0 ${loadaddr_kernel} rooted.img; then bootm ${loadaddr_kernel}; fi
setenv bootcmd=run addbootargs; run bootfromusb; run storeboot
saveenv
Started with “sc2_s905x4_2g.dtb”.
Not work bluetooth.
Not work dvb tuner.
Work wifi.
Not started with original dtb from firmware.