Resolved! Change default tf-a and u-boot serial linux console.
Hello, my main seriale console should be USART2 instead of UART4. I modified the kernel dts as follows: chosen { stdout-path = "serial0:115200n8"; }; aliases { ethernet0 = ðernet0; mmc0 = &sdmmc1; mmc1 = &sdmmc2; serial0 = &usart2; ...