i.MX ProcessorsのトピックRe: imx6 Linux Kernel Source File modification

imx6 Linux Kernel Source File modification

riteshpanchal — Wed, 24 Jun 2015 10:10:37 GMT

I am using fsl-yocto-3.14.28-1.0.1 project.

And i want to modify some source file of the linux kernel.

For example i am trying to change 'build-x11/tmp/work/imx6qsabresd-poky-linux-gnueabi/linux-imx/3.14.28-r0/git/drivers/media/platform/mxc/capture/ov5640.c' file.

After modifying the file i executed "bitbake -c cleansstate linux-imx" command.

But then if i execute "bitbake fsl-image-multimedia-full" modified ov5640.c overwrite with the default one.

So how can i change the kernel source file?

Re: imx6 Linux Kernel Source File modification

Yuri — Wed, 24 Jun 2015 10:26:44 GMT

Please refer to the Yocto FAQ :

i.MX Yocto Project: Frequently Asked Questions

i.MX Yocto Project: How can I (quickly) modify the kernel and test it?

Have a great day,
Yuri

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Re: imx6 Linux Kernel Source File modification

riteshpanchal — Wed, 24 Jun 2015 12:28:12 GMT

Please find my custom layer file. i have put it on my build folder.

And added BBLAYER in conf\bblayers.conf

And also i have checked it found by bitbake by following command

bitbake-layers show-layers

And after that if execute

bitbake -c cleansstate linux-imx

i got following error

ERROR: No recipes available for:
/home/ritesh/fsl-release-bsp/build-x11/meta-fsl-custom/recipes-kernel/linux/linux-imx.bbappend

I just change one line in ov5640.c file and i want to just test kernel patching.

i also tried to add test.bb file in recipies/linux folder and adding the following contain

SRC_URI += "file://0001-ov5640.c-test-string-change.patch"
patch -p1 0001-ov5640.c-test-string-change.patch

So i got error "Failed to parse recipe: /home/ritesh/fsl-release-bsp/build-x11/meta-fsl-custom/recipes-kernel/linux/test.bb"

And for quick kernel modification. I can successfully create zImage and tried following command to flash

sudo cp tmp/deploy/images/imx6qsabresd/zImage /media/ritesh/Boot\ imx6qs

But Linux freezing after Starting kernel message on terminal.

Re: imx6 Linux Kernel Source File modification

dilshad_alam — Fri, 31 Jul 2015 07:12:09 GMT

Hi Yuri Mohan,

Does free scale provide Revision history between Kernel Migrations.

Suppose I am using Kernel 3.10.17 and planning to Migrate to 3.14.28. So do you have some document which has details on BSP changes done in new kernel.

Thanks,

Dilshad

Re: imx6 Linux Kernel Source File modification

Yuri — Fri, 31 Jul 2015 08:53:56 GMT

The only comments regarding new versions may be found in Release Notes

in each BSP doc.

Regards,

Yuri.

Re: imx6 Linux Kernel Source File modification

dilshad_alam — Fri, 31 Jul 2015 09:28:05 GMT

Can you provide some links to have this information.

Thanks,

Dilshad

Re: imx6 Linux Kernel Source File modification

Yuri — Mon, 03 Aug 2015 05:21:34 GMT

Please find the enclosed.

Regards,

Yuri.

Re: imx6 Linux Kernel Source File modification

dilshad_alam — Mon, 03 Aug 2015 06:26:23 GMT

Thanks Yuri Muhin.

Really Helpful.