topic Re: i.MX6 DDR Stress Test Tool V2.70 from U-BOOT in i.MX Processors

i.MX6 DDR Stress Test Tool V2.70 from U-BOOT

Kazuma_Sasaki — Mon, 04 Sep 2017 12:01:34 GMT

Hi Community,

Our target board does not have USB port. therefore, I am investigating method of DDR stress test tool from U-BOOT.

I have done DDR stress test tool with SABRE AI (i.MX6Q) board to confirm usage of this tool.

I suppose DDR stress test tool is almost working well. But, I found different result from both log files.

When I execute DDR stress test tool from U-BOOT, write leveling calibration worked by fixed setting as following log.

Is it okay? or, my procedures somethings wrong?

1. Input Enter key to stop boot sequence.

2. Input following command to U-BOOT prompt to invoke tool.

=> dcache off

=> icache off

=> fatload mmc 1:1 0x00907000 ddr-test-uboot-jtag-mx6dq.bin

=> go 0x00907000

Start write leveling calibration...
running Write level HW calibration
Write leveling calibration completed, update the following registers in your initialization script
    MMDC_MPWLDECTRL0 ch0 (0x021b080c) = 0x001F001F
    MMDC_MPWLDECTRL1 ch0 (0x021b0810) = 0x001F001F
    MMDC_MPWLDECTRL0 ch1 (0x021b480c) = 0x001F001F
    MMDC_MPWLDECTRL1 ch1 (0x021b4810) = 0x001F001F
Write DQS delay result:
   Write DQS0 delay: 31/256 CK
   Write DQS1 delay: 31/256 CK
   Write DQS2 delay: 31/256 CK
   Write DQS3 delay: 31/256 CK
   Write DQS4 delay: 31/256 CK
   Write DQS5 delay: 31/256 CK
   Write DQS6 delay: 31/256 CK
   Write DQS7 delay: 31/256 CK

a) ddr_calibration_20170904-20'28'3.log -> this log file got from GUI tool(DDR_Tester.exe).

b) ddr_calibration_log_by_uboot.log -> this log file got from U-BOOT tool(ddr-test-uboot-jtag-mx6dq.bin).

Best Regards,

Kazuma Sasaki.

Original Attachment has been moved to: ddr_calibration_log_by_uboot.log.zip

Original Attachment has been moved to: ddr_calibration_20170904-20'28'3.log.zip

Re: i.MX6 DDR Stress Test Tool V2.70 from U-BOOT

Yuri — Tue, 05 Sep 2017 03:11:26 GMT

Hello,

Please check if the results of both tools (GUI and U-boot) are reproducible.

Difference between results may be observed because of different memory initialization.

I hope the following threads help to clarify the issue :

DDR3 calibration tool write leveling issue

imx6dl - ddr3 issues.

DDR calibration on Imx6

DDR3 calibration for i.MX6

https://community.nxp.com/message/921930

Have a great day,
Yuri

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Re: i.MX6 DDR Stress Test Tool V2.70 from U-BOOT

Kazuma_Sasaki — Tue, 05 Sep 2017 05:37:51 GMT

Hello Yuri,

I appreciate your support.

How do we change initialization settings of DDR via U-BOOT tool?

When I use GUI tool, I can change initialization settings as script file.

e.g. MX6Q_SabreSD_DDR3_1GB_64bit.inc

Best Regards,

Kazuma Sasaki.

Re: i.MX6 DDR Stress Test Tool V2.70 from U-BOOT

Yuri — Tue, 05 Sep 2017 06:38:33 GMT

Hello,

If it is possible to get and test memory initialization parameters with GUI tool,

please use them. As for U-boot memory initialization - it is implemented in the DCD

table. You may look at U-boot chapter in "i.MX_BSP_Porting_Guide.pdf" for more
details.

http://www.nxp.com/webapp/Download?colCode=L4.1.15_2.1.0_LINUX_DOCS&Parent_nodeId=1337699481071706174845&Parent_pageType…

Regards,

Yuri.