Hello, so to provide an update on g60 progress: reflashed dtbo with empty dtbo, because erase doesn't work on this device, also disabled tlmm and dispcc as offered. flashed vbmeta just on case. Unfortunately, it doesn't boot anyway. Also tried compiling and booting u-boot by cloning sm7150 u-boot fork, copying dts to dts/upstream/src/arm64/qcom and running

make qcom_defconfig
make
and then making an image with mkbootimg based on offset info from vendor boot

Maybe anyone has an idea where to look next?