imx8 m4 的debug uart 输出的是乱码

[advten]

imx8mq  在uboot下. cortex m4 的debug uart 输出log正常

启动内核后, 通过rpmsg 和m4 互传消息, cortex m4 的debug uart 输出的是乱码.  

启动参数:

console=ttymxc0,115200 earlycon=ec_imx6q,0x30860000,115200 root=/dev/mmcblk1p2 rootwait rw video=HDMI-A-1:1920x1080@60 

[joanxie]

I tested the demo image "imx8mm_m4_TCM_rpmsg_lite_str_echo_rtos.bin
maybe you can try to use the command to test :u-boot=> fatload mmc 1:1 0x7E0000 imx8mm_m4_TCM_rpmsg_lite_str_echo_rtos.binu-boot=>bootaux 0x7E0000