Can't start rpmsg pingpong on iMX8ULP

[dzmitry]

Hi everyone,

I tried to start example project rpmsg_lite_pingpong_rtos_linux_remote from SDK. First i build m33 release and flashed it. Then in a35 I used insmod imx_rpmsg_pingpong.ko, but ttyRPMSG didn't show up and m33 stucked on waiting of link. Also attached logs of cores.

What is wrong?

[dzmitry · Accepted solution]

In picocoremx8ulp.dts I added #define SUPPORT_M33 and example statrted to work!

[Alejandro_Salas]

Hello @dzmitry 

Could you please share your SDK version and your BSP version?

Also, please share the Arm GCC toolchain used to compile the .bin file.

Best regards,

Salas.

[dzmitry]

Hi   @Alejandro_Salas

SDK_2_16_000_MIMX8UD5xxx08
BSP 6.1.55_2.2.0
arm-gnu-toolchain-13.2.Rel1-mingw-w64-i686-arm-none-eabi

[Alejandro_Salas]

Hello, 

Unfortunately I could not replicate by my side, but could you please try to append the clk_ignore_unused to the mmcargs in U-boot?

For the logs, make me think that the M33 is gating during the boot process of cortex A.

Best regards,

Salas.

[dzmitry]

Hello,

I appended the clk_ignore_unused to the mmcargs in U-boot, but it didn't helped. What else can you suggest to detect problem?