To build under android top dir, please follow below steps. 1. clone the git under ANDROID_ROOT/vendor/nxp-opensource 2. check out to branch integration_vsi_4.0.8p2_android 3. cd ANDROID_ROOT 4. source build/envsetup.sh 5. lunch evk_8mp-userdebug 6. ./imx-make.sh kernel -j8 7. ./imx-make.sh vvcam (add "-c" for clean build) 8. generate the ko in ANDROID_ROOT/out/target/product/evk_8mp/obj/VVCAM_OBJ/vvcam.ko