topic Re: Scarthgap Images Fail to Boot on Custom LS1012A Board via SD Card in Layerscape

Scarthgap Images Fail to Boot on Custom LS1012A Board via SD Card

Dhanyalakshmi — Sat, 03 May 2025 05:50:05 GMT

We are encountering a boot issue on our custom LS1012A-based board when using rootfs and boot-partition images generated from the Scarthgap branch, while booting from the SD card.

What Works:

On the FRWY-LS1012A evaluation board, both Mickledore and Scarthgap branch images (rootfs & boot-partition) boot successfully from the SD card.
On our custom board, images (rootfs & boot-partition) built from the Mickledore branch boot successfully from the SD card.

What Fails:

On our custom board, the system fails to boot when using the Scarthgap branch images (rootfs & boot-partition) from the SD card. The kernel appears to hang shortly after starting.

Hardware Differences (Custom Board vs. FRWY-LS1012A):

Our custom board is derived from the FRWY-LS1012A with the following minor hardware changes:

Audio input/output ports removed
M.2 Type-E NGFF slot removed
mikroBus Click headers removed

Other components and peripherals remain unchanged.

SDK Source:

The Scarthgap Yocto SDK was downloaded from:
https://github.com/nxp-qoriq/yocto-sdk/tree/scarthgap

Please let us know if the image build steps or SD card preparation process are needed for verification. We are happy to provide complete logs and reproduction steps.

Re: Scarthgap Images Fail to Boot on Custom LS1012A Board via SD Card

yipingwang — Fri, 09 May 2025 09:01:49 GMT

Please download Scarthgap prebuilt Kernel image and dtb file from the following link.

https://support.nxp.com/s/case/500Tg00000KC1b9IAD/community-scarthgap-images-fail-to-boot-on-custom-ls1012a-board-via-sd-card?language=en_US

Please refer to the following command to boot Kernel Image.

=>tftp 0xa0000000 Image

=>tftp 0xb0000000 fsl-ls1012a-frwy.dtb

=> booti 0xa0000000 - 0xb0000000

Please check whether you get the same error on your custom board.

If yes, please use mtest command to test DDR memory in u-boot.

Re: Scarthgap Images Fail to Boot on Custom LS1012A Board via SD Card

Dhanyalakshmi — Fri, 09 May 2025 11:52:07 GMT

Thank You Yiping for the reply,

I tried with the dtb and image you have provided but SD card still did not boot properly. I have attached the logs for your reference. Please provide guidance why SDK built from scarthgap branch unable to boot from SD card.

And how to resolve this issue.

Thank You

Re: Scarthgap Images Fail to Boot on Custom LS1012A Board via SD Card

yipingwang — Mon, 12 May 2025 08:32:59 GMT

The system didn't stop at the same place, so I suspect there is problem with your DDR controller initialization.

What's the result to do DDR test with "mtest" command?

Did you find any error?

Re: Scarthgap Images Fail to Boot on Custom LS1012A Board via SD Card

Dhanyalakshmi — Mon, 12 May 2025 08:44:39 GMT

Thank You Yiping for the reply,Here's the result of the command.

=> mtest
Testing 80000000 ... 9fffffff:
Pattern 0000000000000000 Writing...

it stuck here only for about 5 minutes. Is it normal?

Re: Scarthgap Images Fail to Boot on Custom LS1012A Board via SD Card

yipingwang — Mon, 12 May 2025 08:49:35 GMT

It's abnormal, the DDR test program cannot run normally at all.

Please use QCVS DDRv tool to connect to your custom board to do optimization and validation.

Re: Scarthgap Images Fail to Boot on Custom LS1012A Board via SD Card

Dhanyalakshmi — Mon, 12 May 2025 10:02:19 GMT

Can you guide me to perform optimization and validation using DDRv tool.

Also,I have a doubt if the same custom board able to boot SD card which has rootfs and boot-partition images built from mickledore and styhead branch then why not working for sacrthgap?

Re: Scarthgap Images Fail to Boot on Custom LS1012A Board via SD Card

yipingwang — Tue, 13 May 2025 09:17:10 GMT

For QCVS DDRv tool usage, you could refer to the following document.

https://www.nxp.com.cn/docs/en/user-guide/QCVS_DDR_User_Guide.pdf

https://community.nxp.com/t5/Qonverge-Knowledge-Base/DDR-Controller-Configuration-on-LS2085-LS2080-B...

You could use "read from target" method to create a QCVS DDR project, then connect to your target board to do validation to get the optimized parameters.

After successful validation, please click Project->Generate Processor Expert Code to get the optimized DDR controller configuration parameters in file ddr_init1.c, and use it to modify ATF source code plat/nxp/soc-ls1012a/ls1012afrwy/ddr_init.c.