How i.MX8QM M4 core use MU_12_B to monitor AP power of A core?

[jinchen1227]

The imx8qm Android auto use M4 core as rear view camera demo, 

And it use LSIO__MU12_B interrupt to monitor AP power, when receive this interrup, 

it treat this as AP reboot.

My question is how this interrupt generate? Where is the configuare of this MU?

I can't get this interrup in my demo.

Code place:

vendor/nxp/mcu-sdk-auto/SDK_MEK-MIMX8QM/boards/mekmimx8qm/demo_apps/rear_view_camera/cm4_core1/isi_board.c

[igorpadykov]

Hi jinchen1227

one can try to debug it, please look at MU initialization codes

in ../imx8qm_m4rpmsg_platform.c

Best regards
igor