Preparing the software¶
To receive video from a SDI-MIPI Video Converter, the receiver must include drivers for the Semtech GS2971A deserializer.
Building the BSP¶
To enable the SDI-MIPI Video Converter support, you need to build the kernel with the required drivers and the device tree for the board. Antmicro provides a preconfigured Linux kernel for the Jetson Xavier NX.
To fetch, build, and add the modified kernel to a stock L4T 32.4.4 package, you must do the following:
Get and extract the cross-compilation toolchain:
wget http://releases.linaro.org/components/toolchain/binaries/7.3-2018.05/aarch64-linux-gnu/gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu.tar.xz
tar xf gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu.tar.xz
export PATH=$(pwd)/gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu/bin:$PATH
Get and set up the L4T-based host software:
wget https://developer.nvidia.com/embedded/L4T/r32_Release_v4.4/r32_Release_v4.4-GMC3/T186/Tegra186_Linux_R32.4.4_aarch64.tbz2
tar xf Tegra186_Linux_R32.4.4_aarch64.tbz2
wget https://developer.nvidia.com/embedded/L4T/r32_Release_v4.4/r32_Release_v4.4-GMC3/T186/Tegra_Linux_Sample-Root-Filesystem_R32.4.4_aarch64.tbz2
sudo tar xf Tegra_Linux_Sample-Root-Filesystem_R32.4.4_aarch64.tbz2 -C Linux_for_Tegra/rootfs/
pushd Linux_for_Tegra
sudo ./apply_binaries.sh
sudo chown -R $USER rootfs/lib/modules
sudo chown -R $USER rootfs/lib/firmware
popd
Clone the kernel sources and
checkoutthe branch that matches your hardware:
git clone https://github.com/antmicro/sdi-mipi-bridge-linux
pushd sdi-mipi-bridge-linux
git checkout video-converter
Build the kernel using
make:
export ARCH=arm64
export CROSS_COMPILE=aarch64-linux-gnu-
make tegra_defconfig
make -j$(nproc)
Install the kernel image, modules and device tree blob:
cp ./arch/arm64/boot/Image ../Linux_for_Tegra/kernel/
cp ./arch/arm64/boot/dts/tegra194-p3668-all-p3509-0000.dtb ../Linux_for_Tegra/kernel/dtb/
INSTALL_MOD_PATH=../Linux_for_Tegra/rootfs/ make modules_install
sudo chown -R root ../Linux_for_Tegra/rootfs/lib/modules
sudo chown -R root ../Linux_for_Tegra/rootfs/lib/firmware
popd
Uploading the BSP¶
To flash the software on the device, put the device in recovery mode, connect it to the host PC with a USB cable, and use the following command:
pushd Linux_for_Tegra
sudo ./flash.sh jetson-xavier-nx-devkit-emmc mmcblk0p1
popd