iMX6 Rex Yocto

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This Wiki section guides through preparation and compiling images using Yocto Project.

Download and install repo utility

Note: As Freescale disabled its primary git servers, the official repositories were moved. The files for building can be accessed by following this workaround.

To download the board support package, repositories need to be installed. To prepare them follow these steps: 

mkdir -pv ~/workdir/bin
# curl http://commondatastorage.googleapis.com/git-repo-downloads/repo  > ~/workdir/bin/repo
chmod a+x ~/workdir/bin/repo
PATH=${PATH}:~/workdir/bin

Yocto Project 2.1

Every OS requires different set of installed packages. More information about Yocto requirements could be acquired in Freescale Yocto Project User's Guide.

Initialize Yocto Project

Download the BSP Yocto Project Environment: 

mkdir -pv ~/workdir/voipac/imx6/yocto/fsl-release-bsp-2.1
cd ~/workdir/voipac/imx6/yocto/fsl-release-bsp-2.1
git config --global user.name "Your Name"
git config --global user.email "Your Email"
git config --list
repo init -u git://git.freescale.com/imx/fsl-arm-yocto-bsp.git -b imx-4.1-krogoth

Init iMX6 Rex layer

Add iMX6 Rex support: 

mkdir -pv .repo/local_manifests/
cat > .repo/local_manifests/imx6rex.xml << EOF
<?xml version="1.0" encoding="UTF-8"?>
<manifest>

  <remote fetch="git://github.com/Voipac" name="voipac"/>

  <project remote="voipac" revision="master" name="meta-fsl-arm-voipac" path="sources/meta-fsl-arm-voipac">
    <copyfile src="voipac-setup.sh" dest="voipac-setup.sh"/>
  </project>
</manifest>
EOF

Sync

Synchronize repositories: 

cd ~/workdir/voipac/imx6/yocto/
ln -s fsl-release-bsp-2.1 fsl-release-bsp
cd ~/workdir/voipac/imx6/yocto/fsl-release-bsp
PATH=${PATH}:~/workdir/bin
repo sync

Configure

Add Voipac meta layer into BSP: 

source voipac-setup.sh

Build workarounds

Building process could get halted. This session contains few workarounds for commonly observed failures. These commands fix compiling on Ubuntu 16.04 operating system.

Issue: Preferred bootloader and kernel are overwritten during compilation fsl-image recipe
Cause and fix: fsl-image overwrite bootloader/kernel provided by meta-fsp-voipac. To remove this limitation replace '=' with '?='

Original version: 

meta-fsl-bsp-release/imx/meta-sdk/conf/distro/include/fsl-imx-preferred-env.inc:PREFERRED_PROVIDER_u-boot_mx6 = "u-boot-imx"
meta-fsl-bsp-release/imx/meta-sdk/conf/distro/include/fsl-imx-preferred-env.inc:PREFERRED_PROVIDER_virtual/bootloader_mx6 = "u-boot-imx"
meta-fsl-bsp-release/imx/meta-sdk/conf/distro/include/fsl-imx-preferred-env.inc:PREFERRED_PROVIDER_virtual/kernel_mx6 = "linux-imx"

Modified version: 

meta-fsl-bsp-release/imx/meta-sdk/conf/distro/include/fsl-imx-preferred-env.inc:PREFERRED_PROVIDER_u-boot_mx6 ?= "u-boot-imx"
meta-fsl-bsp-release/imx/meta-sdk/conf/distro/include/fsl-imx-preferred-env.inc:PREFERRED_PROVIDER_virtual/bootloader_mx6 ?= "u-boot-imx"
meta-fsl-bsp-release/imx/meta-sdk/conf/distro/include/fsl-imx-preferred-env.inc:PREFERRED_PROVIDER_virtual/kernel_mx6 ?= "linux-imx"


Issue: Web browser recipes are disabled
Fix: Comment out to enable

meta-browser/recipes-browser/chromium/chromium_48.0.2548.0.bb:#PNBLACKLIST[chromium] ?= "BROKEN: fails to build with gcc-6"
meta-browser/recipes-browser/chromium/cef3_280796.bb:#PNBLACKLIST[cef3] ?= "BROKEN: fails to build with gcc-6"
meta-browser/recipes-mozilla/firefox/firefox_38.8.0esr.bb:#PNBLACKLIST[firefox] ?= "BROKEN: fails to build with gcc-6"

Build customization

Configuration files are created during setup (setup-environment, fsl-setup-release.sh). The file to update can be found: 

/workdir/voipac/imx6/yocto/fsl-release-bsp/build-x11/conf/local.conf

By modifying local.conf file, custom features can be easily added: 

#CORE_IMAGE_EXTRA_INSTALL += " chromium libexif"
CORE_IMAGE_EXTRA_INSTALL += " firefox stress"
LICENSE_FLAGS_WHITELIST = "commercial"

IMAGE_INSTALL_append = " \
    video-input-demo \
    multimedia-demo \
    lpc-demo \
"

IMAGE_ROOTFS_EXTRA_SPACE_append += "+ 500000"


Working environment setup has been finished and is ready for building images.

Yocto Project 2.0

Getting the BSP

Every OS requires different set of installed packages. More information about Yocto requirements could be acquired in Freescale Yocto Project User's Guide.

Initialize Yocto Project

Download the BSP Yocto Project Environment: 

mkdir -pv ~/workdir/voipac/imx6/yocto/fsl-release-bsp-2.0
cd ~/workdir/voipac/imx6/yocto/fsl-release-bsp-2.0
git config --global user.name "Your Name"
git config --global user.email "Your Email"
git config --list
repo init -u git://git.freescale.com/imx/fsl-arm-yocto-bsp.git -b imx-4.1.15-1.0.0_ga

Init iMX6 Rex layer

Add iMX6 Rex support: 

mkdir -pv .repo/local_manifests/
cat > .repo/local_manifests/imx6rex.xml << EOF
<?xml version="1.0" encoding="UTF-8"?>
<manifest>

  <remote fetch="git://github.com/Voipac" name="voipac"/>

  <project remote="voipac" revision="refs/tags/v2.1" name="meta-fsl-arm-voipac" path="sources/meta-fsl-arm-voipac">
    <copyfile src="voipac-setup.sh" dest="voipac-setup.sh"/>
  </project>
</manifest>
EOF

Sync

Synchronize repositories: 

cd ~/workdir/voipac/imx6/yocto/
ln -s fsl-release-bsp-2.0 fsl-release-bsp
cd ~/workdir/voipac/imx6/yocto/fsl-release-bsp
PATH=${PATH}:~/workdir/bin
repo sync

Configure

Add Voipac meta layer into BSP: 

source voipac-setup.sh

Build workarounds

Building process could get halted. This session contains few workarounds for commonly observed failures. These commands fix compiling on Ubuntu 16.04 operating system.

Issue: Qemu-native linking failure
Fix: Add BUILD_LDFLAGS_prepend_pn-qemu-native directive into build-dir/conf/local.conf 

BUILD_LDFLAGS_prepend_pn-qemu-native = "-Wl,-rpath-link,/lib/x86_64-linux-gnu "


Issue: Preferred bootloader and kernel are overwritten during compilation fsl-image recipe
Cause and fix: fsl-image overwrite bootloader/kernel provided by meta-fsp-voipac. To remove this limitation replace '=' with '?='

Original version: 

meta-fsl-bsp-release/imx/meta-sdk/conf/distro/include/fsl-imx-preferred-env.inc:PREFERRED_PROVIDER_u-boot_mx6 = "u-boot-imx"
meta-fsl-bsp-release/imx/meta-sdk/conf/distro/include/fsl-imx-preferred-env.inc:PREFERRED_PROVIDER_virtual/bootloader_mx6 = "u-boot-imx"
meta-fsl-bsp-release/imx/meta-sdk/conf/distro/include/fsl-imx-preferred-env.inc:PREFERRED_PROVIDER_virtual/kernel_mx6 = "linux-imx"

Modified version: 

meta-fsl-bsp-release/imx/meta-sdk/conf/distro/include/fsl-imx-preferred-env.inc:PREFERRED_PROVIDER_u-boot_mx6 ?= "u-boot-imx"
meta-fsl-bsp-release/imx/meta-sdk/conf/distro/include/fsl-imx-preferred-env.inc:PREFERRED_PROVIDER_virtual/bootloader_mx6 ?= "u-boot-imx"
meta-fsl-bsp-release/imx/meta-sdk/conf/distro/include/fsl-imx-preferred-env.inc:PREFERRED_PROVIDER_virtual/kernel_mx6 ?= "linux-imx"

Build customization

Configuration files are created during setup (setup-environment, fsl-setup-release.sh). The file to update can be found: 

/workdir/voipac/imx6/yocto/fsl-release-bsp/build-x11/conf/local.conf

By modifying local.conf file, custom features can be easily added: 

CORE_IMAGE_EXTRA_INSTALL += " chromium"
CORE_IMAGE_EXTRA_INSTALL += " packagegroup-fslc-gstreamer1.0-full"
LICENSE_FLAGS_WHITELIST = "commercial"

IMAGE_INSTALL_append = " \
    video-input-demo \
    multimedia-demo \
"


Working environment setup has been finished and is ready for building images.

Yocto Project 1.7

Every OS requires different set of installed packages. More information about Yocto requirements could be acquired in Freescale Yocto Project User's Guide.

Initialize Yocto Project

Download the BSP Yocto Project Environment: 

mkdir -pv ~/workdir/voipac/imx6/yocto/fsl-release-bsp-1.7
cd ~/workdir/voipac/imx6/yocto/fsl-release-bsp-1.7
git config --global user.name "Your Name"
git config --global user.email "Your Email"
git config --list
repo init -u git://git.freescale.com/imx/fsl-arm-yocto-bsp.git -b imx-3.14.28-1.0.1_patch

Init iMX6 Rex layer

Add iMX6 Rex support: 

mkdir -pv .repo/local_manifests/
cat > .repo/local_manifests/imx6rex.xml << EOF
<?xml version="1.0" encoding="UTF-8"?>
<manifest>

  <remote fetch="git://github.com/Voipac" name="voipac"/>

  <project remote="voipac" revision="v1_3_patch" name="meta-fsl-arm-voipac" path="sources/meta-fsl-arm-voipac">
    <copyfile src="voipac-setup.sh" dest="voipac-setup.sh"/>
  </project>
</manifest>
EOF

Sync

Synchronize repositories: 

cd ~/workdir/voipac/imx6/yocto/
ln -s fsl-release-bsp-1.7 fsl-release-bsp
cd ~/workdir/voipac/imx6/yocto/fsl-release-bsp
PATH=${PATH}:~/workdir/bin
repo sync

Configure

Add Voipac meta layer into BSP: 

source voipac-setup.sh

Build workarounds

Building process could get halted. This session contains few workarounds for commonly observed failures. These commands fix compiling on Ubuntu 16.04 operating system.

Issue: GCC compilator downgrade
Cause and fix: Ubuntu uses GCC-5 by default but some Yocto (branch imx-3.14.28-1.0.1_patch) packages are not compatible with this compiler. To keep the functionality, switching to older version is required: 

sudo apt-get install gcc-4.8 g++-4.8
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 100 --slave /usr/bin/g++ g++ /usr/bin/g++-4.8
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 50 --slave /usr/bin/g++ g++ /usr/bin/g++-5
sudo update-alternatives --config gcc


Issue: Qemu-native compilation failure
Cause and fix: Ubuntu uses newer version of the SDL libraries which are not compatible with Yocto (branch imx-3.14.28-1.0.1_patch). This commands needs to be run after every "source *" command to commend out SDL support: 

sed -i 's/^PACKAGECONFIG_append_pn-qemu-native/#PACKAGECONFIG_append_pn-qemu-native/' conf/local.conf 
sed -i 's/^PACKAGECONFIG_append_pn-nativesdk-qemu/#PACKAGECONFIG_append_pn-nativesdk-qemu/' conf/local.conf

Build customization

Configuration files are created during setup (setup-environment, fsl-setup-release.sh). The file to update can be found: 

/workdir/voipac/imx6/yocto/fsl-release-bsp/build-x11/conf/local.conf

By modifying local.conf file, custom features can be easily added: 

CORE_IMAGE_EXTRA_INSTALL += " chromium"
CORE_IMAGE_EXTRA_INSTALL += " packagegroup-fslc-gstreamer1.0-full"
LICENSE_FLAGS_WHITELIST = "commercial"

IMAGE_INSTALL_append = " \
    video-input-demo \
    multimedia-demo \
"


Working environment setup has been finished and is ready for building images.

Building images

Locate the Yocto working directory: 

cd ~/workdir/imx6/yocto/fsl-release-bsp

Supported machines (Production): 

imx6-openrexbasic
imx6-openrexmax
imx6-openrexmax4g
imx6-openrexultra
imx6-rexbasic
imx6-rexpro
imx6-rexultra
imx6-tinyrexlite
imx6-tinyrexbasic
imx6-tinyrexpro
imx6-tinyrexmax
imx6-tinyrexmax4g
imx6-tinyrexultra

Supported machines (Prototypes): 

imx6dl-rex
imx6s-tinyrex
imx6q-tinyrex

Supported distros (Freescale): 

fsl-imx-x11 - Only X11 graphics
fsl-imx-wayland - Wayland weston graphics
fsl-imx-xwayland - Wayland graphics and X11. X11 applications using EGL are not supported
fsl-imx-fb - Frame Buffer graphics - no X11 or Wayland

Console image

Setup and build for Console image: 

MACHINE=<machine name> source setup-environment build-dir
MACHINE=<machine name> bitbake core-image-base

Toolchain

Setup and build for Toolchain: 

MACHINE=<machine name> bitbake core-image-base -c populate_sdk

FSL GUI image

Setup and build for FSL GUI image:

Yocto 2.1

DISTRO=<distro name> MACHINE=<machine name> source fsl-setup-release.sh -b bld-u1604-x11
DISTRO=<distro name> MACHINE=<machine name> bitbake fsl-image-gui

Yocto 2.0/1.7

MACHINE=<machine name> source fsl-setup-release.sh -b build-x11 -e x11
MACHINE=<machine name> bitbake fsl-image-gui

Voipac image

Setup and build for Voipac image: 

MACHINE=<machine name> source setup-environment build-vpac
MACHINE=<machine name> bitbake vpac-image-full-cmdline
MACHINE=<machine name> bitbake vpac-image-full-cmdline -c populate_sdk

Output files

Output images and archives are stored in these locations: 

~/workdir/voipac/imx6/yocto/fsl-release-bsp/build-dir/tmp/deploy/images
~/workdir/voipac/imx6/yocto/fsl-release-bsp/build-dir/tmp/deploy/sdk

Storing images to SD card

cd ~/workdir/voipac/imx6/yocto/fsl-release-bsp/build-dir/tmp/deploy/images/<machine name>
sudo dd if=<image name>.sdcard of=/dev/sd<partition> bs=1M && sync

or 

cd ~/workdir/voipac/imx6/yocto/fsl-release-bsp/build-dir/tmp/deploy/images/<machine name>
gunzip -c core-image-base-<machine name>.sdcard.gz | sudo dd of=/dev/sd<partition> bs=1M && sync
Retrieved from "https://wiki.voipac.com/index.php?title=iMX6_Rex_Yocto&oldid=3489"