PROCESSOR-SDK-AM62X: Build for AM6232

Hi Ashutosh,

You should look at this file to reduce the number of cpu cores.

https://git.ti.com/cgit/ti-u-boot/ti-u-boot/tree/arch/arm/dts/k3-am625.dtsi?h=ti-u-boot-2023.04

In order to disable GPU you may want to add in the DTS file

gpu{

    status = disabled;

};

https://git.ti.com/cgit/ti-u-boot/ti-u-boot/tree/arch/arm/dts/k3-am625-sk.dts?h=ti-u-boot-2023.04

Building the Device Tree blob (DTB) using make linux-dtbs as mentioned in the below link:

software-dl.ti.com/.../Top_Level_Makefile.html

• linux-dtbs - Compiles and creates the device tree blobs.

Also you can use maxcpus in u-boot boot args to specify the number of CPU cores you want to use as mentioned in the below link:

https://dev.ti.com/tirex/explore/node?node=A__AUTBljJxXWNOgUHj.1-BaA__AM62-ACADEMY__uiYMDcq__LATEST&placeholder=true

Hope this helps.

Best Regards,

Suren

Hi Suren,

Sorry for late response. 

I have tried above steps but could not able reduce the CPU no's and Disable GPU. In my code base "k3-am625.dtsi" and "k3-am625-sk.dts" is available in build directory and as per my understanding we cannot change the configuration in build directory. Please correct me if I am wrong.

Do I need to create patch and apply in my yacto build environment and apply the changes. Kindly confirm

Regards,

Kumar Ashutosh

Hi Ashutosh,

Happy New year.

Yes, you would have to create a patch and rebuild the yocto build environment if you are using the Yocto build. Or you could apply the patch to u-boot/kernel sources that is part of the installer.bin of the SDK offering.

Let me know how it goes.

Best Regards,

Suren

Hi Suren,

Happy New Year.

Thankyou for your response.

We are currently facing an issue while attempting to apply a patch for disabling CPU cores on the AM625 processor. The patch has been placed at the following location:

Path:tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-rt_6.1.bb

However, we are encountering an error during the patch application process. Below is the error message we are receiving:

linux-ti-staging-rt-6.1.46+gitAUTOINC+b871cdee8c-r0b.arago1_tisdk_4_edgeai_0_edgeai_7 do_patch: Applying patch 'disable_cpu_core.patch' on target directory 'tisdk/build/arago-tmp-default-glibc/work/am62xx_evm-oe-linux/linux-ti-staging-rt/6.1.46+gitAUTOINC+b871cdee8c-r0b.arago1_tisdk_4_edgeai_0_edgeai_7/git'
CmdError('quilt --quiltrc tisdk/build/arago-tmp-default-glibc/work/am62xx_evm-oe-linux/linux-ti-staging-rt/6.1.46+gitAUTOINC+b871cdee8c-r0b.arago1_tisdk_4_edgeai_0_edgeai_7/recipe-sysroot-native/etc/quiltrc push', 0, 'stdout: Applying patch disable_cpu_core.patch
patching file arch/arm64/boot/dts/ti/k3-am625-sk.dts
Hunk #1 FAILED at 48.
1 out of 1 hunk FAILED -- rejects in file arch/arm64/boot/dts/ti/k3-am625-sk.dts
Patch disable_cpu_core.patch does not apply (enforce with -f)
stderr: ')
ERROR: Logfile of failure stored in: tisdk/build/arago-tmp-default-glibc/work/am62xx_evm-oe-linux/linux-ti-staging-rt/6.1.46+gitAUTOINC+b871cdee8c-r0b.arago1_tisdk_4_edgeai_0_edgeai_7/temp/log.do_patch.933213
ERROR: Task (tisdk/sources/meta-ti/meta-ti-bsp/recipes-kernel/linux/linux-ti-staging-rt_6.1.bb:do_patch) failed with exit code '1'

We have followed the steps outlined in the discussion on the TI E2E community forum (Link), but the issue persists.

Could you please provide guidance on resolving this error? Additionally, if there are any updates, patches, or workarounds that we may have missed, we would appreciate your assistance in this matter.

Regards,

Kumar Ashutosh

Ashutosh,

The error is pointing to patch not being applied and there is an error in the patch file. Can you cross check your patch file?

Also, can you try to apply the patch on the u-boot source and just build the u-boot instead of the yocto build

I can have your query routed to our yocto build expert for further assistance.

Best Regards,

Suren