iMX6 TinyRex Yocto

Download and install repo utility

To get the BSP you need to have repo installed. To install it 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 require different set of the installed packages. More information about Yocto requirements are in Freescale Yocto Project User's Guide.

Initialise 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 Tinyrex layer

Add iMX6 TinyRex 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

Sync 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 customisation

Configuration files are created during setup (setup-environment, fsl-setup-release.sh).
By modifying local.conf files we can easily add custom features. The file can he found

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

#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"

Building images

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 here

~/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