When required, it is possible to bypass the ISP of an NXP i.MX8M Plus based platform through the v4l2 framework 

Grabbing a raw image through v4l2 tool example:

v4l2-ctl --stream-mmap -d2 --set-fmt-video=width=3840,height=2160,pixelformat=GB10 --stream-skip=100 --stream-count=1 --stream-to=img.raw