2074315_en-US

[#1]

iMX8MP-EVK Unable to launch jailhouse mode with Yocto Harpoon image

Dear Forum,

Why struggling with the Yocto Harpoon on an iMX8MN custom board, I followed the instruction in the Harpoon User Guide  to bitbake a reference Yocto Harpoon image (imx-image-core) for the iMX8MP-EVK that I have.

However, after stopping at the u-Boot prompt, running the following commands :

u-boot=> setenv jh_root_dtb imx8mp-evk-harpoon.dtb
u-boot=> run jh_mmcboot

I did not see any information about launching of the jailhouse mode within the main debug console :

[    3.445096] platform regulatory.0: Falling back to sysfs fallback for: regulatory.db
[    3.449382] ALSA device list:
[    3.460120]   No soundcards found.
[    3.463714] Waiting for root device /dev/mmcblk2p2...
[   13.542494] platform sound-bt-sco: deferred probe pending
[   60.417495] imx-sdma 30bd0000.dma-controller: Direct firmware load for imx/sdma/sdma-imx7d.bin failed with error -2
[   60.427957] imx-sdma 30bd0000.dma-controller: Falling back to sysfs fallback for: imx/sdma/sdma-imx7d.bin
[   64.485494] cfg80211: failed to load regulatory.db
[   64.485494] cfg80211: failed to load regulatory.db
[  121.829456] imx-sdma 30e10000.dma-controller: external firmware not found, using ROM firmware
[  121.829501] imx-sdma 30bd0000.dma-controller: external firmware not found, using ROM firmware

However, from what I saw from your partner's video, they seemed to launch the jailhouse cell manually within the root console. I am not sure if they ran commands in the u-Boot as I did.

Could you help please ?

Best Regards,
Khang

i.MX 8M | i.MX 8M Mini | i.MX 8M NanoRe: iMX8MP-EVK Unable to launch jailhouse mode with Yocto Harpoon image

Hi again,

I just found out that the Yocto Harpoon image should be flashed to and executed from the micro-SD card rather than the eMMC.

Sorry to bother you.