i.mx8mq with 4GB RAM boot error found for upper 32bits

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i.mx8mq with 4GB RAM boot error found for upper 32bits

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rlach
Contributor II

Hi,

We want to customize the board based on i.mx8mq with LPDDR4 4GB but it failed to boot with 4GB configuration in u-boot.

Here are the codes that we updated:

In this header file: uboot-imx/include/configs/imx8mq_evk.h

Changed from #define PHYS_SDRAM_SIZE 0xC0000000 to #define PHYS_SDRAM_SIZE 0x100000000

And in this folder: uboot-imx/board/freescale/imx8mq_evk/ddr

Replaced ddr_init.c and ddrphy_train.c by files generated from MSCALE DDR Tool for 4GB RAM.  

It would be appreciated if you could give some idea about anywhere else to update.

Note: It worked fine with 2GB RAM.

Best Regards,

Ratha

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rlach
Contributor II

Hi Yuri, 

Thanks for your reply. I'll try to use new U-boot. 

Best Regards,

Ratha 

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Yuri
NXP TechSupport
NXP TechSupport

Hello,

  Have You tested memory parameters with the memory test?

https://community.nxp.com/docs/DOC-340179 

 

Have a great day,

Yuri

 

 

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rlach
Contributor II

Hi, 

Yes, I have tested memory parameters with DDR Tool. Actually, I searched and found some topics related to this issue in order to support 4GB DRAM. Maybe it is caused by using old version of Kernel. Is it possible to make old version of Kernel work with 4GB DRAM?  

Best Regards,

Ratha  

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Yuri
NXP TechSupport
NXP TechSupport

Hello,

  generally "MSCALE_DDR_Tool_User_Guide.pdf", Chapter 4 (How to bring up a new

MX8MSCALE board) describes how generate DDR initial code.

Files ddr_init.c and ddrphy_train.c are used with old version of u-boot;

lpddr4_timing.c - for new U-boot.

Regards,

Yuri.

178 Views
rlach
Contributor II

Hi Yuri, 

Thanks for your reply. I'll try to use new U-boot. 

Best Regards,

Ratha 

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