Hi @vix,
The overlays on the master branch are compatible with the mainline kernel (meaning we tested them with the upstream Linux kernel), not just vendor kernels. For the HMP functionality on i.MX8MP, the same overlay used on toradex_5.15-2.2.x-imx also works on the master branch, but we haven’t updated the master branch yet. If you plan to use HMP on i.MX8MP, even on the master branch, you’ll also need to consider the module parameter mentioned earlier [1].
[1] Imx8mp clock Linux module parameter
Regards,
João Paulo