i.MX ProcessorsのトピックRe: i.MX8MQ EVK cannot boot from SD card and eMMC

i.MX8MQ EVK cannot boot from SD card and eMMC

Derek0902 — Wed, 06 Dec 2023 04:51:11 GMT

Hi,

I use the customized board and the Linux version is 6.1.36-2.1.0. Then I use core-image-minimal as boot image. When the board is booting up, it cannot enter kernel and stop at this log.

SD card :

eMMC :

The attached file is the complete log of booting from eMMC.

Can anyone provide the correct boot log?

Thanks & Regards,

Derek Lin

Re: i.MX8MQ EVK cannot boot from SD card and eMMC

Harvey021 — Fri, 08 Dec 2023 07:13:08 GMT

Hi @Derek0902

Please find the attachment for both boot log of SD and eMMC.

Regards

Harvey

Re: i.MX8MQ EVK cannot boot from SD card and eMMC

Derek0902 — Fri, 08 Dec 2023 07:27:59 GMT

Hi @Harvey021 ,

Thanks for your help!

I have a question that is possible to decrease CPU frequency in u-boot? Is it possible to solve the boot problem?

Thanks & Regards,

Derek Lin

Re: i.MX8MQ EVK cannot boot from SD card and eMMC

Harvey021 — Tue, 12 Dec 2023 09:27:53 GMT

Can't see boot problem from the CPU Freq. About decreasing Freq, you can have a try to modify "int clock_init" from clock_imx8mq.c in uboot.

Regards

Harvey

Re: i.MX8MQ EVK cannot boot from SD card and eMMC

Derek0902 — Wed, 13 Dec 2023 04:08:57 GMT

Hi @Harvey021 ,

I found that it only support two grades. Can it be modified lower frequency than 800MHz?

And I have disabled almost all the device that I don't need or unusual. It stop at "waiting for root device". The roofs doesn't be mounted. I think that It doesn't seem to be related to CPU frequency. What could be the problem?

Regards,

Derek Lin