RAM configuration

[shamiullah]

Hello all,

I am using imx6ulevk board and we want to configure a new RAM for our customized board. D2516ECMDXGME-U is the new RAM we want to configure. I have seen in uboot for details but i find three directories names mx6ul_14x14_ddr3_val/  , mx6ul_14x14_evk/ and mx6ul_14x14_lpddr2_val/ in uboot-imx/board/freescale/

Can you  please share the procedure for new RAM configuration and in which do we have to make changes ?

Thanks and Regards

Shamiullah

[igorpadykov]

Hi Shamiullah

for new ddr it is necessary to use RPA tool and ddr test

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/i-MX-6-7-DDR-Stress-Test-Tool/ta-p/11082...

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/i-MX6UL-ULL-ULZ-DRAM-Register-Programmin...

and update uboot dcd header with new ddr settings found from test

https://source.codeaurora.org/external/imx/uboot-imx/tree/board/freescale/mx6ul_14x14_evk/imximage.c...

May be useful i.MX Porting Guide​

Best regards
igor

[shamiullah]

Hi igor,

Thank you for quick and valuable response.

The previous DDR used in imx6ul evk is DDR3 and the new DDR is also of DDR3 technology. The change is only the data rate and timing settings. So do we have to change the whole settings for new DDR ?

Thanks and Regards

Shamiullah

[igorpadykov]

>So do we have to change the whole settings for new DDR ?

yes. All steps should be implemented: RPA tool and ddr test, dcd header change.

Best regards
igor

[shamiullah]

Hi Igor,

> yes. All steps should be implemented: RPA tool and ddr test, dcd header change.

For new DDR configuration, the configuration is to be done in uboot ? or in kernel?

Thanks & Regards

Shamiullah

[igorpadykov]

>For new DDR configuration, the configuration is to be done in uboot ? or in kernel?

update uboot dcd header with new ddr settings found from test

https://source.codeaurora.org/external/imx/uboot-imx/tree/board/freescale/mx6ul_14x14_evk/imximage.c...

Best regards
igor

[shamiullah]

I have updated the DCD table in uboot imximage.cfg file . After compilation when i see the values in board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c file the values are different. Please find the attached screenshot below

Thanks and Regards

Shamiullah