i.MX Processors中的主题 Re: IMX93 u-boot for LPDDR4

IMX93 u-boot for LPDDR4

logan3c3 — Fri, 17 Jan 2025 10:50:42 GMT

Hello team,
i am trying to port u-boot for a custom board with lpddr4 when i added ddr timing file and even modified spl.c by hardcoding ddr timing. The build was successful i made image into a Flash.bin file but i wasn't able to flash the file to the target board emmc the flashing fails after 19% , i checked the cable and the usb port everything is okay and working fine. Is any further changes required to be made to board specific files related to lpddr4 am i missing any steps as i have already modified Kconfig, Makefile,dts and defconfig for the same can anybody help with what i am facing??
#IMX93evk #u-boot #spl

Re: IMX93 u-boot for LPDDR4

Chavira — Fri, 17 Jan 2025 13:23:00 GMT

Hi @logan3c3!

Thank you for contacting NXP Support!

Do you performed the ddr stress test to your board with your timing configuration??

It is important to configure correctly the ddr memory in your board and when your board pass all the ddr stress test you should not have problems flashing or booting your board.

Best Regards!

Chavira

Re: IMX93 u-boot for LPDDR4

logan3c3 — Sat, 18 Jan 2025 07:51:56 GMT

Can you please confirm if the methods i followed are correct. can you please suggest the tool to test stress test for imx93

Re: IMX93 u-boot for LPDDR4

Chavira — Mon, 20 Jan 2025 13:19:52 GMT

Hi @logan3c3!

You can use our Config Tools for i.MX Applications Processors to generate your timing file and perform the DDR tests.

Re: IMX93 u-boot for LPDDR4

logan3c3 — Tue, 21 Jan 2025 07:35:29 GMT

it passed all the stress test. but still not being able to flash the file to emmc. what might be the issue also while building u-boot gives warning related to bl31.bin not present and u-boot.bin not present which is then later used in building final image "flash.bin"

Re: IMX93 u-boot for LPDDR4

logan3c3 — Tue, 21 Jan 2025 08:59:14 GMT

Here are the modifications i have done

added support in arch/arm/mach-imx/imx9/Kconfig

config TARGET_IMX93_11X11_EVK bool "imx93_11x11_evk" select OF_BOARD_FIXUP select IMX93 config TARGET_IMX93_CALIXTO_VERSA_256 bool "imx93_calixto_versa" select OF_BOARD_FIXUP select IMX93 config TARGET_IMX93_CALIXTO_VERSA_512 bool "imx93_calixto_versa" select OF_BOARD_FIXUP select IMX93 config TARGET_IMX93_CALIXTO_VERSA_1024 bool "imx93_calixto_versa" select OF_BOARD_FIXUP select IMX93 config TARGET_IMX93_CALIXTO_VERSA_2048 bool "imx93_calixto_versa" select OF_BOARD_FIXUP select IMX93

Then i added a new vendor folder path to keep custom board related info.

inside it i modified the Kconfig, spl

if TARGET_IMX93_CALIXTO_VERSA_2048 || TARGET_IMX93_CALIXTO_VERSA_1024 || TARGET_IMX93_CALIXTO_VERSA_512 || TARGET_IMX93_CALIXTO_VERSA_256 config SYS_BOARD default "imx93_calixto_versa" config SYS_VENDOR default "calixto" config SYS_CONFIG_NAME default "imx93_calixto_versa" choice prompt "Select DDR Type" default IMX93_EVK_LPDDR4 if TARGET_IMX93_CALIXTO_VERSA_2048 || TARGET_IMX93_CALIXTO_VERSA_1024 || TARGET_IMX93_CALIXTO_VERSA_512 || TARGET_IMX93_CALIXTO_VERSA_256 help Select the type of DDR to be used. config IMX93_EVK_LPDDR4X bool "Using LPDDR4X Timing and PMIC voltage" select IMX9_LPDDR4X help Select the LPDDR4X timing and 0.6V VDDQ config IMX93_EVK_LPDDR4 bool "Using LPDDR4 Timing and PMIC voltage" select IMX9_LPDDR4X help Select the LPDDR4 timing and 1.1V VDDQ endchoice endif

For SPL

extern struct dram_timing_info dram_timing_1866mts; extern struct dram_timing_info lpddr4_2GiB_micron_timing; void spl_dram_init(void) { struct dram_timing_info *ptiming = &lpddr4_2GiB_micron_timing; #if IS_ENABLED(CONFIG_IMX93_EVK_LPDDR4) && IS_ENABLED(CONFIG_TARGET_IMX93_CALIXTO_VERSA_2048) if (is_voltage_mode(VOLT_LOW_DRIVE)) ptiming = &lpddr4_2GiB_micron_timing; #elif IS_ENABLED(CONFIG_TARGET_IMX93_CALIXTO_VERSA_2048) && IS_ENABLED(CONFIG_IMX93_EVK_LPDDR4X) ptiming = &lpddr4x_2GB_versa_timing; #elif IS_ENABLED(CONFIG_TARGET_IMX93_CALIXTO_VERSA_1024) && IS_ENABLED(CONFIG_IMX93_EVK_LPDDR4X) ptiming = &lpddr4x_1GB_versa_timing; #elif IS_ENABLED(CONFIG_TARGET_IMX93_CALIXTO_VERSA_512) && IS_ENABLED(CONFIG_IMX93_EVK_LPDDR4X) ptiming = &lpddr4x_512MB_versa_timing; #elif IS_ENABLED(CONFIG_TARGET_IMX93_CALIXTO_VERSA_256) && IS_ENABLED(CONFIG_IMX93_EVK_LPDDR4X) ptiming = &lpddr4x_256MB_versa_timing; #endif printf("DDR: %uMTS\n", ptiming->fsp_msg[0].drate); ddr_init(ptiming); }

and i have copied include file to the custom board name, created dts and defconfig from the reference board.

Do i need to modify anything apart from this??

Re: IMX93 u-boot for LPDDR4

Chavira — Wed, 22 Jan 2025 13:39:49 GMT

HI @logan3c3!

Have you updated your config for each ddr size?

The config file for iMX93 EVK is this file

Also you have to update the OPTEE OS configurations too if is used in this file

Try updating those files according each model that you want to use it.

We have a similar configuration for LPDDR4 and DDR4 models in iMX8MP EVK you can take as a reference for your implementation that configuration file

Best Regards!

Chavira

Re: IMX93 u-boot for LPDDR4

logan3c3 — Thu, 23 Jan 2025 04:16:22 GMT

Hello @Chavira ,
Currently i am trying to build only for 2048 so its configured for 2GB but is not being able flash per se . I have not modified for rest of the memory configuration as i am not building those. I am not using OPTEE also. What might be the problem?

Re: IMX93 u-boot for LPDDR4

Chavira — Thu, 23 Jan 2025 14:11:28 GMT

HI @logan3c3!

Have you download and include the files lpddr4_pmu_train_imem.bin and lpddr4_pmu_train_dmem.bin?

Can you share your patches (u-boot, SPL, ATF, etc) and timing files to try by my side?

Are you compiling with Yocto or Standalone?

I recommend to do that Standalone first.

Best Regards!

Chavira