Config Tools for i.MX -> U-boot crashes

[melon87]

I have a custom DDR4 imx 8 plus design. I am having a really difficult time getting this working and would really appreciate further support. I worry we cant take NXP forward in this design otherwise.

I am using Config Tools for i.MX which does pass training. When I copy the timing file (timing.c) generated by Config Tools u-boot crashes.

To check my setup, I used Config Tools to generate timing.c for the LP-DDR evaluation kit and uboot was fine!

When I use the default ddr4 timing.c file from the evaluation kit, uboot on my custom PCB does boot but for a slow DDR4 clock speed.

Why is DDR4 on my custom PCB not working using the timing.c output from Config Tools whilst training passed?

[AldoG]

Hello,

Could you share the steps you have followed when building your own uboot?
Also, please share the uboot version you're working with.

Best regards/Saludos,
Aldo.

[melon87]

@AldoG Thank you for helping me

We are following the i.MX Linux User's Guide (IMXLUG) LF6.1.55_2.2.0 15 December 2023 when we are building U-Boot.

Our code comes from the repo at https://github.com/nxp-imx/uboot-imx and we are using the branch lf_v2023.04.

To compile U-Boot, we cd to the Uboot code and then run these commands:

export CROSS_COMPILE=aarch64-none-elf-

make distclean
make imx8mp_ddr4_evk_defconfig
make

We then copy u-boot.bin and u-boot-spl.bin to the imx-mkimage code, cd to this location and run these commands to make the image:

make SOC=iMX8MP flash_ddr4_evk

[AldoG]

Hello,

I believe that you have skkiped some steps here and there, please confirm, I can share some steps to build in standalone for the i.MX8MScale devices.

When you copied your timing.c file to uboot before build, did you rename it accordinlgly (ddr4_timing.c)?

Best regards/Saludos,
Aldo.

[melon87]

@AldoG  

We used the Config Tools for i.MX V15 to generate the timing file. It generated a file called ddr4_timing.c so there was no need to change the name. I replaced the default version of ddr4_timing.c in u-boot with the generated version prior to compiling.

[AldoG]

Hello,

Thank you for sharing more information, could you share at which point did uboot crashed?
Or does not even boot?

Best regards/Saludos,
Aldo.