Hello zengxing yuan,
You could use SDK 1.9(Kernel 3.12) pre_bult images to do verification, SDK 1.9 pre-built image ISO can be downloaded from https://nxp.flexnetoperations.com/control/frse/product?child_plneID=684021&cert_num=181474981&ver=AR...
You also could download Linux Kernel 4.x(4.1 or 4.4) from the upstream to build uImage to do verification,probably some patches are missed in the Kernel source which you downloaded.
Have a great day,
TIC
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