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Recipe for building Yocto4.0 Linux for PN8M-090T

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Recipe for building Yocto 4.0 Linux for PN8M-090T

Recipe for building Yocto Linux for PN8M-090T

Check the compiling method on the open document form NXP:

Suggest O/S:Ubuntu 20.04 or later.

Storage: Please make sure the capacity of your storage has 300GB or bigger space.

RAM: Please make sure the physical memory + swap has 16GB or bigger capacity.


Step 1. Install Host packages:

Essential Yocto Project host packages:

sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib \
build-essential chrpath socat cpio python python3 python3-pip python3-pexpect \
xz-utils debianutils iputils-ping python3-git python3-jinja2 libegl1-mesa \
libsdl1.2-dev pylint3 xterm rsync curl zstd lz4 libssl-dev

Step 2. Change the python version under \user\bin\python and Insall the repo utility:

Change the shortcut under /usr/bin to python 3.8. or later

$ sudo ln -sf /usr/bin/python3.8 /usr/bin/python

$ ls -l python
to check the python status: Python -> python3.8

Create the bin folder in the home directory and dowlonad Freescale Community BSP

$ mkdir ~/bin
$ sudo apt --yes install curl
$ curl > ~/bin/repo
$ chmod a+x ~/bin/repo

Step 3. Add the following line to the .bashrc file to make sure the ~/bin folder is in the PATH.

export PATH=~/bin:$PATH

Step 4. Ensure the git is properly set up by commands below:

$ git config --global "Your Name" $ git config --global "Your Email" $ git config --list

Step 5. Download the i.MX Yocto Project Community BSP recipe layers:

$ mkdir imx-yocto-bsp $ cd imx-yocto-bsp $ repo init -u -b imx-linux-kirkstone -m imx-5.15.71-2.2.0.xml $ repo sync

Step 6. Unzip the Recipe for building Yocto Linux for PN8M-090T to the file ‘imx-yocto-bsp”

Step 7. Create the setup environment by command below (You could change the file name as you want)

$ DISTRO=fsl-imx-xwayland MACHINE=dm421 source -b build-dmp

Please input “y” when the EULA confirmation pop out.

Step 8. Edit conf/local.conf file and add the content below at the bottom


at the recipe, copy and replace “Sources” folder to “imx-yocto-bsp” and bblayers.conf & local.conf to “/im-yocto-bsp/build-dmp/conf/”.

CORE_IMAGE_EXTRA_INSTALL += "chromium-ozone-wayland"

IMAGE_INSTALL:append += " \
    expand-rootfs \
    linux-firmware \
    Pulseaudio \

Step 9. Edit conf/bblayers.conf file and add the content below at the bottom:

BBLAYERS += " ${BSPDIR}/sources/meta-custom-dmp "

Step 10. Run the command below.

$ bitbake imx-image-full

The system will start to download and install source code, patch file, and compilation

How to install the image file by UUU.

After implemented bitbake imx-image-full, it will generate an image file and be stored in the file under build-dmp/tmp/deploy/images/dm421

In the build-dmp/tmp/deploy/images/dm421 file, we’ll need the file below for the image restoration.

1. imx-image-full-dm421-XXXXXXXXXXXXX.rootfs.wic.zst
2. imx-boot-dm421-sd.bin-flash_evk

Input command to get the image file - imx-image-full-dm395e.wic (In this file, there are packaged kernel and rootfs):

$ zstd -d imx-image-full-dm421-XXXXXXXXXXXXX.rootfs.wic.zst

Download the sample: UUU application under Linux:

uuu_version 1.0.1

SDP: boot -f dm421-231017-wm8960.bin-flash_evk or dm421-231017-wm8962.bin-flash_evk
# This command will be run when use SPL
SDPU: delay 1000
SDPU: write -f dm421-231017-wm8960.bin-flash_evk or dm421-231017-wm8962.bin-flash_evk -offset 0x57c00
SDPU: jump
# This command will be run when ROM support stream mode
SDPS: boot -f dm421-231017-wm8960.bin-flash_evk or dm421-231017-wm8962.bin-flash_evk
# These commands will be run when use SPL and will be skipped if no spl
# if (SPL support SDPV)
SDPV: delay 1000
SDPV: write -f dm421-231017-wm8960.bin-flash_evk or dm421-231017-wm8962.bin-flash_evk -skipspl
SDPV: jump

FB: ucmd setenv fastboot_dev mmc
FB: ucmd setenv mmcdev 2
FB: ucmd mmc dev 2 0
FB: flash -raw2sparse all dm421-231108.wic
FB: flash bootloader dm421-231017-wm8960.bin-flash_evk or dm421-231017-wm8962.bin-flash_evk
FB: ucmd if env exists emmc_ack; then ; else setenv emmc_ack 0; fi;
FB: ucmd mmc partconf 2 ${emmc_ack} 1 0
FB: done

After you have set your own file name, you could input the command below to install the Yocto Linux