topic i.MX 8QXP DDR Stress Test in i.MX Processors

i.MX 8QXP DDR Stress Test

carolyn_zhang — Mon, 14 Sep 2020 09:23:20 GMT

Hi,

There is a 4GB DDR4 on my board, then I do the DDR stress test, region 2 is failed, it could not go to t0.2. However, it is ok if I set the device information as same as the MEK board, which means it is ok when I tested as 3GB DDR4. Could someone give me some advices please? Thanks.

The log is:

*************************************************************************
MX8 DDR Stress Test Version: ER14
Built on Mar 27 2020 12:28:23
*************************************************************************

--Set up the MMU and enable I and D cache--
- This is the Cortex-A35 core
- Check if I cache is enabled
- Enabling I cache since it was disabled
- Push base address of TTB to TTBR0_EL3
- Config TCR_EL3
- Config MAIR_EL3
- Enable MMU
- Data Cache has been enabled
- Check system memory register, only for debug

- VMCR Check:
- ttbr0_el3: 0x13d000
- tcr_el3: 0x2051c
- mair_el3: 0x774400
- sctlr_el3: 0xc01815
- id_aa64mmfr0_el1: 0x101122

- MMU and cache setup complete

*************************************************************************
ARM Clock(CA35): 1200MHz
DDR Clock: 1200MHz

============================================
DDR configuration
DDR type is LPDDR4
Data width: 32, bank num: 8
Row size: 16, col size: 10
Two chip selects are used
Number of DDR controllers used on the SoC: 1
Density per chip select: 2048MB
Density per controller is: 4096MB
Total density detected on the board is: 4096MB

Command Bus Training was executed
No DDR data training errors detected for DDRC0
============================================

MX8QXP: Cortex-A35 is found

*************************************************************************
DDR Stress Test Iteration 1
--------------------------------
--Running DDR test on region 1--
--------------------------------

t0.1: data is addr test
....
t0.2: row hop read test
...

t1: memcpy SSN armv8_x32 test
....
t2: byte-wise SSN armv8_x32 test
..
t3: memcpy pseudo random pattern test
....................................................................
t4: IRAM_to_DDRv1 test
...

t5: IRAM_to_DDRv2 test
--------------------------------
--Running DDR test on region2--
--------------------------------

t0.1: data is addr test
...

Re: i.MX 8QXP DDR Stress Test

igorpadykov — Mon, 14 Sep 2020 10:29:31 GMT

Hi carolyn_zhang

one can check that latest RPA tool was used and versions of

RPA tool, SCFW and kernel were aligned to each other as described on below link

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/i-MX-8-8X-Family-DDR-Tools-Release/ta-p/1121519

Best regards
igor

Re: i.MX 8QXP DDR Stress Test

carolyn_zhang — Tue, 15 Sep 2020 01:42:17 GMT

Hi, Igorpadykov,

Thanks for your reply, but the website is useless since community changed a new revision. However, I have solved this problem by modified SCFW.

Thank you all the same.

Re: i.MX 8QXP DDR Stress Test

carolyn_zhang — Tue, 15 Sep 2020 01:44:34 GMT

Totally speaking, I don't like the new community, it always show 'Article or Comment Not Found'.

Re: i.MX 8QXP DDR Stress Test

scott3303 — Thu, 15 Jul 2021 15:13:44 GMT

Hi @carolyn_zhang ,

I have the same problem on our custom board can you share with me your fix to figure out on this problem.

Thanks.

Regards.

Tommaso

Re: i.MX 8QXP DDR Stress Test

carolyn_zhang — Fri, 16 Jul 2021 01:24:53 GMT

Hi,

The default setting of SCFW is 3GB, change it to 4GB, rebuild SCFW and change scfw_download.bin in ddr_strss_test.