There are some demo binaries for imx8mq-evk. I found them in output folder after building source. I am using meta-fsl-bsp-release (4.9.88-2.0.0)
IMAGE_BOOTFILES += "imx8mq_m4_TCM_hello_world.bin imx8mq_m4_TCM_rpmsg_lite_pingpong_rtos_linux_remote.bin imx8mq_m4_TCM_rpmsg_lite_str_echo_rtos.bin"
My question is "Is there any document or user guide that help me flashing these firmware to M4 core?" I don't know how to use these firmware. Many thanks for help!