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1 Overview

This document describes how to build an image for an i.MX

Freescale board by using a Yocto Project build environment. It

describes the Freescale release layer and Freescale-specific

usage.

The Yocto Project is an open-source collaboration focused on

embedded Linux

OS development. For more information

regarding Yocto Project, see the Yocto Project page:

www.yoctoproject.org/. There are several documents on the

Yocto Project home page that describe in detail how to use the

system. The basic Yocto Project, without the Freescale release

layer, can be used by following the instructions in the Yocto

Project Quick Start found at www.yoctoproject.org/docs/

current/yocto-project-qs/yocto-project-qs.html.

The FSL Yocto Project Community BSP (found at

freescale.github.io ) is a development community outside

Freescale providing support for i.MX boards in the Yocto

Project environment. Freescale i.MX joined the Yocto Project

community providing a release based on the Yocto Project

framework. Information specific to FSL community BSP use

can be found on the community web page. This document is

an extension of the community BSP documentation.

Files used to build an image are stored in layers. Layers

contain different types of customizations and come from

different sources. Some of the files in a layer are called

NXP Semiconductors

Document Number: IMXLXYOCTOUG

User's Guide

Rev. L4.1.15_2.1.0-ga, 05/2017

i.MX Yocto Project User's Guide

Contents

1 Overview................................. ................................. 1

2 Features.....................................................................3

3 Host Setup................................................................. 4

4 Yocto Project Setup....................... ...........................5

5 Image Build...............................................................6

6 Image Deployment..................................................12

7 Customization.........................................................12

A Frequently Asked Questions...................................14

B References...............................................................18

C Revision History..................................................... 18

recipes. Yocto Project recipes contain the mechanism to retrieve source code, build and package a component. The following

lists show the layers used in this release.

Freescale release layer

• meta-fsl-bsp-release

• meta-bsp - updates for meta-fsl-arm, poky, and meta-openembedded layers

• meta-sdk - updates for meta-fsl-demos and distros

Yocto Project community layers

• meta-fsl-arm: provides support for the base and for Freescale ARM

reference boards.

• meta-fsl-arm-extra: provides support for 3rd party and partner boards.

• meta-fsl-demos: additional items to aid in development and exercise board capabilities.

• meta-fsl-community-base: often renamed to base. Provides base configuration for FSL Community BSP.

• meta-openembedded: Collection of layers for the OE-core universe. See layers.openembedded.org/.

• poky: basic Yocto Project items in Poky. See the Poky README for details.

• meta-browser: provides several browsers.

• meta-qt5: provides Qt5.

References to community layers in this document are for all the layers in Yocto Project except meta-fsl-bsp-release. Freescale

i.MX boards are configured in the meta-fsl-bsp-release and meta-fsl-arm layers. This includes U-Boot, the Linux kernel, and

reference board-specific details.

Freescale provides an additional layer called the Freescale BSP Release, named meta-fsl-bsp-release, to integrate a new

Freescale release with the FSL Yocto Project Community BSP. The meta-fsl-bsp-release layer aims to release the updated

and new Yocto Project recipes and machine configurations for new releases that are not yet available on the existing meta-

fsl-arm and meta-fsl-demos layers in the Yocto Project. The contents of the Freescale BSP Release layer are recipes and

machine configurations. In many test cases, other layers implement recipes or include files and the Freescale release layer

provides updates to the recipes by either appending to a current recipe, or including a component and updating with patches

or source locations. Most Freescale release layer recipes are very small because they use what the community has provided

and update what is needed for each new package version that is unavailable in the other layers.

The Freescale BSP Release layer also provides image recipes that include all the components needed for a system image to

boot, making it easier for the user. Components can be built individually or through an image recipe, which pulls in all the

components required in an image into one build process.

Freescale kernel and U-Boot releases are accessed through Freescale public git servers. However, several components are

released as packages on the Freescale mirror. The package-based recipes pull files from the Freescale mirror instead of a git

location and generate the package needed.

All packages which are released as binary are built with hardware floating point enabled as specified by the

DEFAULTTUNE defined in each machine configuration file. Software floating point packages are not provided starting with

the jethro releases.

Release L4.1.15_2.1.0_ga is released for Yocto Project 2.1 (Krogoth). The same recipes for Yocto Project 2.1 are going to be

upstreamed and made available on the next release of the Yocto Project release. The Yocto Project release cycle lasts roughly

six months.

The recipes and patches in meta-fsl-bsp-release are upstreamed to the community layers. Once that is done for a particular

component, the files in meta-fsl-bsp-release are no longer needed and the FSL Yocto Project Community BSP will provide

support. The community supports Freescale reference boards, community boards, and third-party boards. A complete list can

be found at freescale.github.io/doc/release-notes/2.1/index.html#document-bsp-scope. All board references in this document

are related to the Freescale machine configuration files only.

Overview

i.MX Yocto Project User's Guide, Rev. L4.1.15_2.1.0-ga, 05/2017

2 NXP Semiconductors

1.1 End user license agreement

During the setup environment process of Freescale Yocto Project Community BSP, the Freescale i.MX End User License

Agreement (EULA) is displayed. To continue to use the Freescale Proprietary software, users must agree to the conditions of

this license. The agreement to the terms allows the Yocto Project build to untar packages from the Freescale mirror.

NOTE

Read this license agreement carefully during the setup process, because once accepted, all

further work in the Freescale Yocto Project environment is tied to this accepted

agreement.

1.2 References

This release includes the following references and additional information.

•

i.MX Linux

Release Notes (IMXLXRN) - Provides the release information.

•

i.MX Linux

User's Guide (IMXLUG) - Contains the information on installing U-Boot and Linux OS and using i.MX-

specific features.

•

i.MX Yocto Project User's Guide (IMXLXYOCTOUG) - Contains the instructions for setting up and building Linux

OS in the Yocto Project.

•

i.MX Linux

Reference Manual (IMXLXRM) - Contains the information on Linux drivers for i.MX.

•

i.MX 6 Graphics User's Guide (IMX6GRAPHICUG) - Describes the graphics used.

•

i.MX BSP Porting Guide (IMXXBSPPG) - Contains the instructions on porting the BSP to a new board.

•

i.MX VPU Application Programming Interface Linux

Reference Manual (IMXVPUAPI) - Provides the reference

information on the VPU API.

The quick start guides contain basic information on the board and setting it up. They are on the NXP website.

• SABRE Platform Quick Start Guide (IMX6QSDPQSG)

• SABRE Board Quick Start Guide (IMX6QSDBQSG)

• i.MX 6UltraLite EVK Quick Start Guide (IMX6ULTRALITEQSG)

• i.MX 6ULL EVK Quick Start Guide (IMX6ULLQSG)

• SABRE Automotive Infotainment Quick Start Guide (IMX6SABREINFOQSG)

• i.MX 6SoloLite Evaluation Kit Quick Start Guide (IMX6SLEVKQSG)

Documentation is available online at nxp.com.

• i.MX 6 information is at nxp.com/iMX6series

• i.MX SABRE information is at nxp.com/imxSABRE

• i.MX 6SoloLite EVK information is at nxp.com/6SLEVK

• i.MX 6SLL EVK information is at nxp.com/6SLLEVK

• i.MX 6UltraLite information is at nxp.com/iMX6UL

• i.MX 6ULL information is at nxp.com/iMX6ULL

• i.MX 7Dual information is at nxp.com/iMX7D

Features

Freescale Yocto Project Release layers have the following features:

• Linux kernel recipe

• The kernel recipe resides in the recipes-kernel folder and integrates a Freescale kernel from the source

downloaded from the Freescale git server. This is done automatically by the recipes in the project.

Features

i.MX Yocto Project User's Guide, Rev. L4.1.15_2.1.0-ga, 05/2017

NXP Semiconductors 3

• L4.1.15_2.1.0_ga is a Linux kernel that Freescale has released only for the Yocto Project.

• Freescale L4.1.15_2.1.0_ga uses device trees. Device tree settings are found in the i.MX machine configuration

files.

• U-Boot recipe

• The U-Boot recipe resides in the recipes-bsp folder and integrates a Freescale uboot-imx.git from the source

downloaded from the Freescale git server.

• Certain i.MX boards use different U-Boot versions.

• Freescale release L4.1.15_2.1.0_ga for the i.MX 6 and i.MX 7 devices uses an updated v2016.07 Freescale U-

Boot version. This version has not been updated for other i.MX Freescale hardware.

• The Freescale Yocto Project Community BSP uses u-boot-fslc from the mainline, but this is only supported by

the U-Boot community and is not supported with the L4.1.15 kernel.

• The Freescale Yocto Project Community BSP updates U-Boot versions frequently, so the information above

might change as new U-Boot versions are integrated to meta-fsl-arm layers and updates from Freescale u-boot-

imx releases are integrated into the mainline.

• Graphics recipes

• Graphics recipes reside in recipes-graphics folder.

• Graphics recipes integrate the Freescale graphics package release. For the i.MX boards that have a GPU, the imx-

gpu-viv recipes package the graphic components for each DISTRO – X11, frame buffer (FB), Xwayland,

Wayland backend, and Weston compositor (Weston).

• Xorg-driver integrates the xserver-xorg.

• i.MX package recipes

imx-lib, imx-test, and firmware-imx reside in recipes-bsp and pull from the Freescale mirror to build and package into

image recipes.

• Multimedia recipes

• Multimedia recipes reside in recipes-multimedia.

• Recipes include imx-codec, imx-parser, libvpuwrap, and gstreamer that pull from the Freescale mirror to build

and package into image recipes.

• Some recipes are provided for codecs that are restricted. Packages for these are not on the Freescale mirror. These

packages are available separately. Contact your Freescale Marketing representative to acquire these.

• Core recipes

Some recipes for rules, such as udev, provide updated i.MX rules to be deployed in the system. These recipes are

usually updates of policy and are used for customization only. Releases only provide updates if needed.

• Demo recipes

Demonstration recipes reside in the meta-sdk directory. This layer contains image recipes and recipes for

customization, such as touch calibration, or recipes for demonstration applications.

Host Setup

To get the Yocto Project expected behavior in a Linux Host Machine, the packages and utilities described below must be

installed. An important consideration is the hard disk space required in the host machine. For example, when building on a

machine running Ubuntu, the minimum hard disk space required is about 50 GB for the X11 backend. It is recommended that

at least 120 GB is provided, which is enough to compile all backends together.

The recommended minimum Ubuntu version is 14.04 but builds for Jethro works on 12.04 or later. Earlier versions may

cause the Yocto Project build setup to fail, because it requires python versions only available starting wtih Ubuntu 12.04. See

The Yocto Project reference manual for more information.

Ubuntu 16.04 users have commented on errors during build for sdl. To fix this comment out in local.conf the following lines

as such adding # character

Host Setup

i.MX Yocto Project User's Guide, Rev. L4.1.15_2.1.0-ga, 05/2017

4 NXP Semiconductors

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