How to compile kernel-module-imx-gpu-viv? - linux-kernel

Question

I am not able to compile the following kernel module https://github.com/Freescale/kernel-module-imx-gpu-viv/tree/upstream/6.2.4.p1.2/kernel-module-imx-gpu-viv-src for my IMX6Q board.
What i have done so far is :
Downloaded the sources from the git repo above in a separate directory
Modified the Makefile to set the correct path to the kernel sources KERNEL_SRC i am building (3.14.52) with :
Makefile :
obj-m := galcore.o
SRC := $(shell pwd)
KERNEL_SRC := /path/to/kernel_imx/
all:
$(MAKE) -C $(KERNEL_SRC) M=$(SRC)/kernel-module-imx-gpu-viv-src AQROOT=${PWD}/kernel-module-imx-gpu-viv-src
cp $(SRC)/kernel-module-imx-gpu-viv-src/Module.symvers $(PWD)
cp $(SRC)/kernel-module-imx-gpu-viv-src/modules.order $(PWD)
modules_install:
$(MAKE) -C $(KERNEL_SRC) M=$(SRC)/kernel-module-imx-gpu-viv-src modules_install
clean:
rm -f *.o *~ core .depend .*.cmd *.ko *.mod.c
rm -f Module.markers Module.symvers modules.order
rm -rf .tmp_versions Modules.symvers
compiled with : make ARCH=arm CROSS_COMPILE=/path/to/buildroot/buildroot/output/host/usr/bin/arm-linux-gnueabihf-
As a result of the compilation, i have no galcore.ko at all, only those 3 files generated :
built-in.o
modules.order ( empty )
Module.symvers ( empty )
I have tried also using buildroot but in the end, i have the same files in the directory output/build/kernel-module-imx-gpu-viv-9bbacfe7753626956a449c6a4f7dffcf6285b4d7
Thanks.

Answer 1

There is already a Buildroot package for this kernel driver: https://git.buildroot.org/buildroot/tree/package/freescale-imx/kernel-module-imx-gpu-viv

Answer 2

Finally i forgot to set MXC_GPU_VIV=m in the kernel configuration, that means to compile this driver as a module.
Now i have the expected galcore.ko correctly built.