I have a 8MPLUSLPD4-PEVK kit I just took out of the box. Attempting to load the simple hello world firmware to the M7 with remoteproc, but upon doing so, the entire system freezes, no console input/output is possible; hard reset is necessary. I was able to replicate on another EVK too.
First tested on pre-loaded eMMC image, and subsequently tested on SD card loaded with imx-image-multimedia-imx8mpevk.wic from the LF_v5.15.71-2.2.0_images_IMX8MPEVK package. No difference.
Here are the steps I performed, using AN5317.pdf as a guide.
In Uboot:
setenv fdtfile imx8mp-evk-rpmsg.dtb
saveenv
In Linux:
root@imx8mpevk:~# ls /sys/class/remoteproc/remoteproc0/
coredump device firmware name power recovery state subsystem uevent
root@imx8mpevk:~# cat /sys/class/remoteproc/remoteproc0/name
imx-rproc
root@imx8mpevk:~# echo -n /lib/firmware > /sys/module/firmware_class/parameters/path
root@imx8mpevk:~# echo -n imx8mp_m7_TCM_hello_world.elf > /sys/class/remoteproc/remoteproc0/firmware
root@imx8mpevk:~# cat /sys/class/remoteproc/remoteproc0/state
offline
root@imx8mpevk:~# echo start > /sys/class/remoteproc/remoteproc0/state
[ 43.589790] remoteproc remoteproc0: powering up imx-rproc
[ 43.597248] remoteproc remoteproc0: Booting fw image imx8mp_m7_TCM_hello_world.elf, size 153328
<FROZEN>
When the "start" command is sent, I can hear a high-pitched electronic noise emanate from the EVK.
On the contrary, I am able to execute the hello-world example directly from uboot and got the M7 "hello world." console output.
fatload mmc 2:1 0x48000000 imx8mp_m7_TCM_hello_world.bin;cp.b 0x48000000 0x7e0000 20000;
bootaux 0x7e0000
