Yocto custom recipe for building beaglebone black's kernel from github for chipsee LCD.

[Ankur Tank]

Hi Experts,

I was trying to build Linux for beaglebone black from official repository

https://github.com/beagleboard/linux

I am able to fetch and run menuconfig but when i try to compile the kernel i get error.

Following is the content of the recipe file.

file name : linux-yocto-chipsee_3.14.bb

path: /home/ankur/yocto_daisy/poky/meta-ybdevelop/recipes-example/linux

inherit kernel

require recipes-kernel/linux/linux-yocto.inc

BRANCH = "3.14"

# Override SRC_URI in a bbappend file to point at a different source

# tree if you do not want to build from Linus' tree.

SRC_URI = "git://github.com/beagleboard/linux.git;branch=${BRANCH};nocheckout=1;name=machine"

LINUX_VERSION ?= "3.14"

LINUX_VERSION_EXTENSION ?= "-custom"

# Override SRCREV to point to a different commit in a bbappend file to

# build a different release of the Linux kernel.

# tag: v3.4 76e10d158efb6d4516018846f60c2ab5501900bc

SRCREV_machine="76e10d158efb6d4516018846f60c2ab5501900bc"

PR = "r1"

PV = "${LINUX_VERSION}+git${SRCPV}"

# Override COMPATIBLE_MACHINE to include your machine in a bbappend

# file. Leaving it empty here ensures an early explicit build failure.

COMPATIBLE_MACHINE = "beaglebone"

File name :linux-yocto-chipsee_3.14.bbappend

File path : /home/ankur/yocto_daisy/poky/meta-ybdevelop/recipes-example/linux

defconfig path: /home/ankur/yocto_daisy/poky/meta-ybdevelop/recipes-example/linux/linux-yocto-chipsee_3.14

With above configuration i am able to fetch and open menuconfig for fetched linux kernel, command i used is as follows,

-----Below command works----

# bitbake linux-yocto-chipsee -c menuconfig

But when i try to compile linux using below command it gives error,

-----Below command gives below errors----

# bitbake linux-yocto-chipsee -c compile

 /bin/sh: 1: arm-poky-linux-gnueabi-gcc: not found

| make[4]: *** [scripts/mod/empty.o] Error 127

| make[3]: *** [scripts/mod] Error 2

| make[3]: *** Waiting for unfinished jobs....

|   SHIPPED scripts/genksyms/lex.lex.c

|   Generating include/generated/mach-types.h

|   SHIPPED scripts/genksyms/keywords.hash.c

|   SHIPPED scripts/genksyms/parse.tab.h

|   SHIPPED scripts/genksyms/parse.tab.c

|   HOSTCC  scripts/genksyms/lex.lex.o

|   CC      kernel/bounds.s

| /bin/sh: 1: arm-poky-linux-gnueabi-gcc: not found

When i try to build using below command that time also it failed.

-----Below command gives below errors along with previous error---

# bitbake linux-yocto-chipsee -c build

ERROR: Multiple .bb files are due to be built which each provide virtual/kernel (/home/ankur/yocto_daisy/poky/meta-ybdevelop/recipes-example/linux/linux-yocto-chipsee_3.14.bb /home/ankur/yocto_daisy/poky/meta/recipes-kernel/linux/linux-yocto_3.14.bb).

 This usually means one provides something the other doesn't and should.

NOTE: Executing SetScene Tasks

NOTE: Executing RunQueue Tasks

ERROR: Function failed: do_compile (log file is located at /home/ankur/yocto_daisy/poky/build_fresh/tmp/work/beaglebone-poky-linux-gnueabi/linux-yocto-chipsee/3.14+gitAUTOINC+76e10d158e-r1/temp/log.do_compile.30878)

ERROR: Logfile of failure stored in: /home/ankur/yocto_daisy/poky/build_fresh/tmp/work/beaglebone-poky-linux-gnueabi/linux-yocto-chipsee/3.14+gitAUTOINC+76e10d158e-r1/temp/log.do_compile.30878

Bitbake layers for linux shows below output

# bitbake-layers show-recipes 'linux*'

Parsing recipes..done.

=== Available recipes matching linux*: ===

linux-dummy:

  meta                 1.0

linux-firmware:

  meta                 1:0.0+gitAUTOINC+600caefd83

linux-libc-headers:

  meta                 3.14

linux-yocto:

  meta                 3.14.4+gitAUTOINC+183622e809_0143c6ebb4

  meta                 3.10 (skipped)

  meta                 3.4 (skipped)

linux-yocto-chipsee:

  meta-ybdevelop       3.14+gitAUTOINC+76e10d158e

linux-yocto-dev:

  meta                 unknown (skipped)

linux-yocto-rt:

  meta                 3.10 (skipped)

  meta                 3.14 (skipped)

  meta                 3.4 (skipped)

linux-yocto-tiny:

  meta                 3.10 (skipped)

  meta                 3.14 (skipped)

  meta                 3.4 (skipped)

linuxdoc-tools-native:

  meta                 0.9.69

linuxptp:

  meta-oe              1.4

Any help/pointer/hint/suggestions to complete this ?

Thank you,

Regards,

Ankur

[Michael Liesenberg]

Hi Ankur,

have you got it to work?

How did you do?

[Ankur Tank]

Hi Michael,

I had updated details in below stackoverflow post,
Hope it will help you,
http://stackoverflow.com/questions/30723261/building-robert-nelsons-linux-kernel-into-yoctodaisy-for-beaglebone-black

Thank you,

Regards,
Ankur

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[Michael Liesenberg]

Hi Ankur,

i am new with Yocto can you explain in a little bit more detailed?

I commented in blue what i dindt understand.

Can you tell me before doing bitbake waht did you do?

Are you able to use USB/HDMI/SOUND on Chipsee Display?

I have the Capacitive Touch what sould i do different?

It runs on I2C.

Thank you,

Michael

/////////////////////////////////////////////////////////////////////////////////////////////////////

Well for time being i downloaded the Yocto_daisy(1.6) toolchain and installed it in my PC. And compiled the Linux external to Yocto build. Here are steps.
I followed below steps in my virtualbox installed ubuntu.

1. in Yocto_daisy build core-image-sato, using following command,

2. bitbake core-image-sato                This is the first thing you do? 

3. Prepare micro SD card with rootfile system, SPL & U-Boot, uImage, dtb, uEnv.txt.  How do you prepare the SD card?

4. Clone beaglebone black Linux using following command

   git clone --depth=1 https://github.com/beagleboard/linux

5. Download yocto-1.6(daisy) toolchain from following link.

   http://downloads.yoctoproject.org/releases/yocto/yocto-1.6/toolchain/
   Based on your machine type download from either i686 or x86_64
   I downloaded following toochain.
   http://downloads.yoctoproject.org/releases/yocto/yocto-1.6/toolchain/i686/poky-eglibc-i686-core-image-sato-armv7a-vfp-neon-toolchain-1.6.sh

6. Install toolchain by running download toolchain script. By default it installs into opt directory, I installed it in default path.

7. In terminal traverse to the above downloaded Linux directory. and set toolchain environment by running following command,

   source /opt/poky/1.6/environment-setup-armv7a-vfp-neon-poky-linux-gnueabi

8. Now configure kernel using following command,

make bb.org_defconfig

8. and then build kernel using following command

   make uImage LOADADDR=0x80008000 -j4

9. now we shall install the modules into local directory using following commands,

   mkdir bbb_modules
   export INSTALL_MOD_PATH=/home/ankur/linux/bbb_modules/
   make modules_install

10. when kernel is built copy uImage(from /arch/arm/boot) and am335x-boneblack-bbb-exp-c.dtb(from /arch/arm/boot) to the BOOT partition of the micro SD card.

For FYI my uEnv.txt looks like this

Disable: HDMI
bootargs=console=ttyO1,115200n8 root=/dev/mmcblk0p2 rootfstype=ext4 rw rootwait;
bootcmd=mmc rescan ; mmc dev 0 ; fatload mmc 0 0x80007fc0 uImage ; fatload mmc 0 0x80F80000 am335x-boneblack-bbb-exp-c.dtb ; echo Ankur... ${bootcmd}; bootm 0x80007fc0 - 0x80F80000;
uenvcmd=boot;

11 . Now copy modules from local directory to the micro SD card, using following commands,

cp -a /home/ankur/linux/bbb_modules/lib /media/ankur/ROOT/
sync

12. Eject the card put it into Beaglbone Black and power on the BBB+LCD.

I am yet to get the Touch calibration working for LCD but once I find it i will update the answer.

Another pending thing is build above kernel into Yocto build system. I will update the answer once i am done with that.

Hope this helps someone with the same issue.