i.MX ProcessorsのトピックRe: Memory configuration for i.MX8QXP in U-boot

Memory configuration for i.MX8QXP in U-boot

Maddis — Thu, 09 May 2019 07:13:48 GMT

Hi,

I'm trying to find lpddr4 configuration for imx8qxp-mek -development board from U-boot, but either it's not there or I'm blind because I just can't seem to find it. There is one for imx8m, but that is different CPU and it's not being used. Seems that imx8qxp_mek_config - file is being used.

I see that imx8m devicetree blobs are being generated, but I haven't yet been able to find which one of them are being used (if any at u-boot).

On i.MX6 it was easy since ddr timing was set at board-configuration file, but not so much no i.MX8 it seems.

Where I can find the lpddr4 config for i.MX8qxp-mek - board in U-boot? U-boot version seems to be u-boot-imx-2017.03.

Re: Memory configuration for i.MX8QXP in U-boot

joanxie — Fri, 10 May 2019 03:47:04 GMT

I will mail "i.MX8QXP Validation And MEK LPDDR4 Register Programming Aids" to you

Re: Memory configuration for i.MX8QXP in U-boot

Maddis — Wed, 15 May 2019 09:06:21 GMT

Hi,

This was exactly I was looking for. Thanks!

Re: Memory configuration for i.MX8QXP in U-boot

danwright — Wed, 20 Nov 2019 23:56:29 GMT

Hi Joan-

This might be exactly what I'm looking for too... can you send these to me as well? It does not appear that any code of this description is to be found for download...

Thanks!

Dan

Re: Memory configuration for i.MX8QXP in U-boot

joanxie — Thu, 05 Dec 2019 03:55:54 GMT

dwright@cumminsallison.com is this your mail address?

Re: Memory configuration for i.MX8QXP in U-boot

danwright — Thu, 05 Dec 2019 18:39:37 GMT

No- my email address is: dan.wright@chargepoint.com. But I have since convinced myself that the initialization of the DDR is actually in the SCU code. And I have found this initialization in the imx-scfw-porting-kit-1.2.5 code.

Re: Memory configuration for i.MX8QXP in U-boot

joanxie — Tue, 10 Dec 2019 07:44:34 GMT

OK, since you have already figure this out , I don't send any mail to you for this question

Re: Memory configuration for i.MX8QXP in U-boot

simon_ko — Tue, 17 Mar 2020 08:18:52 GMT

Hi Joan.

I also want to configure LPDDR4 with i.mx8qxp.
Can I receive the setting excel file?

Re: Memory configuration for i.MX8QXP in U-boot

joanxie — Sat, 04 Apr 2020 12:26:41 GMT

simon.ko@wtmec.com, is this your mail address? did you still need the file?

Re: Memory configuration for i.MX8QXP in U-boot

simon_ko — Sun, 05 Apr 2020 23:49:37 GMT

Hi joan.

I got the Excel configuration file from NXP Korea.

Thank you for your support.

Re: Memory configuration for i.MX8QXP in U-boot

_angelo_ — Mon, 04 Apr 2022 14:45:55 GMT

But imx8qxp mek i have here, B0, uses

MT53B768M32D4DT-062
LPDDR4 24G 768MX32 (3GB) 1.6 GHz

And ddr init in the scfw porting kit seems for 1.2Ghz (imx8qx_dcd_1.2GHz.cfg).

Why ?