Yocto Build Linux

From Variscite Wiki


Build Linux from source code
It is recommended to build the kernel image using Yocto (see the Customizing the Linux kernel page) instead of using the direct method described in this page.
This is because some of the Yocto packages may depend on the kernel, like the WiFi module that is built from outside of the kernel source tree on some of the Yocto releases.

Toolchain installation for out of Yocto builds

To install the toolchain, follow the Yocto Toolchain installation guide.

Build Linux out of Yocto tree

Get the Linux source code:

$ git clone https://github.com/varigit/linux-imx.git
$ cd linux-imx
$ git checkout lf-5.10.y_var04

Build the Linux kernel:

$ source /opt/b2qt/3.3.6/environment-setup-cortexa53-crypto-poky-linux
$ unset LDFLAGS
$ make mrproper
$ make imx8mq_var_dart_defconfig
Customize the kernel configuration (optional step):
$ make menuconfig
Build everything:
$ make -j4
Build Image.gz only:
$ make -j4  Image.gz

Build modules only:
$ make -j4  modules

Build device trees only:
$ make -j4 dtbs
Build only the device tree for DART-MX8M on DT8MCustomBoard V2.x and above with SD and HDMI display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-sd-hdmi.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V2.x and above with SD and LVDS display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-sd-lvds.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V2.x and above with SD and dual LVDS+HDMI display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-sd-lvds-hdmi.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V2.x and above with WIFI and HDMI display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-wifi-hdmi.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V2.x and above with WIFI and LVDS display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-wifi-lvds.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V2.x and above with WIFI and dual LVDS+HDMI display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-wifi-lvds-hdmi.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V2.x and above with M4, SD and HDMI display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-m4-sd-hdmi.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V2.x and above with M4, SD and dual LVDS+HDMI display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-m4-sd-lvds-hdmi.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V2.x and above with M4, WIFI and HDMI display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-m4-wifi-hdmi.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V2.x and above with M4, WIFI and LVDS display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-m4-wifi-lvds.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V2.x and above with M4, WIFI and dual LVDS+HDMI display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-m4-wifi-lvds-hdmi.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with SD and DP display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-sd-dp.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with SD and HDMI display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-sd-hdmi.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with SD and LVDS display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-sd-lvds.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with SD and dual LVDS+DP display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-sd-lvds-dp.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with SD and dual LVDS+HDMI display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-sd-lvds-hdmi.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with WIFI and DP display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-wifi-dp.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with WIFI and HDMI display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-wifi-hdmi.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with WIFI and LVDS display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-wifi-lvds.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with WIFI and dual LVDS+DP display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-wifi-lvds-dp.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with WIFI and dual LVDS+HDMI display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-wifi-lvds-hdmi.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with M4, SD and DP display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-m4-sd-dp.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with M4, SD and HDMI display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-m4-sd-hdmi.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with M4, SD and dual LVDS+DP display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-m4-sd-lvds-dp.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with M4, SD and dual LVDS+HDMI display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-m4-sd-lvds-hdmi.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with M4, WIFI and DP display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-m4-wifi-dp.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with M4, WIFI and HDMI display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-m4-wifi-hdmi.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with M4, WIFI and LVDS display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-m4-wifi-lvds.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with M4, WIFI and dual LVDS+DP display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-m4-wifi-lvds-dp.dtb

Build only the device tree for DART-MX8M on DT8MCustomBoard V1.3/V1.4 with M4, WIFI and dual LVDS+HDMI display:
$ make -j4 freescale/imx8mq-var-dart-dt8mcustomboard-legacy-m4-wifi-lvds-hdmi.dtb


Notes:

If you replace the kernel image (Image.gz) on your system, you also need to reinstall the kernel modules, and vice versa.
If you just want to make a change in the device tree, you can compile and replace it without replacing the kernel image and modules.

Install the built kernel on an SD card

Copy the Image.gz and device trees to the SD card boot partition, and install the modules in the SD card rootfs partition.
Assuming the rootfs partition is mounted on /media/user/rootfs:

Install the kernel image and modules:
$ kver=$(strings arch/arm64/boot/Image | grep -i "Linux version" | awk '{print $3}')
$ sudo cp arch/arm64/boot/Image.gz /media/user/rootfs/boot/Image.gz-${kver}
$ sudo ln -fs /boot/Image.gz-${kver} /media/user/rootfs/boot/Image.gz
$ sudo make ARCH=arm64 modules_install INSTALL_MOD_PATH=/media/user/rootfs

Install the device trees:
$ sudo cp arch/arm64/boot/dts/freescale/*imx*var*.dtb /media/user/rootfs/boot/