How to enter DDR interactive mode by defining CONFIG_STM32MP1_DDR_INTERACTIVE ?

Question

I am using stm32MP157F-DK eval board (on windows) and I would like to try the DDR testing tool on cubeMX. But this is my first time trying to do so - I try to follow steps in "U-Boot SPL: DDR interactive mode" (url: https://wiki.st.com/stm32mpu/wiki/U-Boot_SPL:_DDR_int). It states i should define this mode under CONFIG_STM32MP1_DDR_INTERACTIVE - but I dont understand when or how should I do that? Should this be done on full flashlayout_st-image-*** or should i just have boot running?

Kevin HUBER · Accepted Answer

Hello @Arnas Celkys​ Regarding the end of you question, it seems that you do not have the U-Boot sources in your developer package.Anyway, I will help you ;).Download Developer Package and U-Boot sourcesThe first step to be able to modify the configuration of U-Boot, is to get the Developer package. Please follow this page: https://wiki.st.com/stm32mpu/wiki/STM32MP1_Developer_PackageThe part related to the install of U-Boot is: https://wiki.st.com/stm32mpu/wiki/STM32MP1_Developer_Package#Installing_the_U-BootFollow the steps and untar the sources.Build U-BootOnce you got the sources, you have to go in the extracted folder and follow the “README_HOWTO.txt�? to build the sources.Modify configuration and enable DDR_INTERACTIVEFirstly, to modify the configuration you have to use in the U-Boot folder, the command “make menuconfig�? as explained on the wiki: https://wiki.st.com/stm32mpu/wiki/Menuconfig_or_how_to_configure_kernelCONFIG_STM32MP1_DDR_INTERACTIVE is not the easiest configuration to enable because it implies to have already enabled other configurations.The first things to do is search “DDR_INTERACTIVE�?. To realize a search in the menuconfig, you have to hit “/�? key and type the text that you search.A window like this appears: As you can see, “STM32MP1_DDR�? is set to [=n] because you have to enable “STM32MP1_DDR�? before being able to enable DDR_INTERACTIVE. So search “STM32MP1_DDR�? . You see that you have to enable "OF_CONTROL" and "ARCH_STM32MP" before enabling your configurationSo one more search, search for “OF_CONTROL�? You can hit the key “1�? to directly go where the config is located or you can search it inside "-> Device Tree Control"Enable the configuration.  Then to enable "ARCH_STM32MP", you have to change the architecture type from Sandbox to ARM.This can be done at the root of the menu: Select ARM architecture in the list. Now, a new menu appears “ARM Architecture�?. Go inside and looks at “Target select�?. Modify it to select “Support STMicroelectonics STM32MP Socs with cortex A�? Finally, you can search again “DDR_INTERACTIVE�? and you will see that you enabled the needed “STM32MP1_DDR�? !Hit the key “1�? to go directly in the correct submenu or go in: Location:                                                                               │  │    -> Device Drivers                                                                     │     │      -> STM32MP1 DDR driver (STM32MP1_DDR [=y]) And enable it. The CONFIG_STM32MP1_DDR_INTERACTIVE configuration is now activated.Be careful to save your modifications.You can now rebuild the U-Boot sources with these configurations enabled, by following the "README.HOW_TO.txt".BUT doesn't apply again the default configuration by doing: make stm32mp15_<config>_defconfigOtherwise you will lose your modifications.Hope it helps you,Regards,KevinIn order to give better visibility on the answered topics, please click on 'Select as Best' on the reply which solved your issue or answered your question. See also 'Best Answers'

Kevin HUBER · Answer

Hello @Arnas Celkys​  ,I just saw that I provided you the complete procedure to activate the DDR_INTERACTIVE mode for the U-Boot, but I'm sorry because there was an easiest way as explained on the U-Boot SPL page:https://wiki.st.com/stm32mpu/wiki/U-Boot_SPL:_DDR_interactive_mode#DDR_interactive_modeIt is possible to compile to force DDR_INTERACTIVE mode by adding DDR_INTERACTIVE=1 in the make option.So you just have to add DDR_INTERACTIVE=1 in your make command line.The option will be handled by the makefile : drivers/ram/stm32mp1/MakefileThat will force the activation of : CONFIG_STM32MP1_DDR_INTERACTIVE_FORCEFIPRegarding FIP, it is normal that you do not have FIP partition because you are using a partition scheme to use an U-Boot SPL.I forgot that point during the previous answers.So I explained you how to generate an image with a FIP package which is the normal way to use the environment v3.1.0, but it was not related to your main question.DDR INTERACTIVE for U-Boot SPLTo answer your main question, the only thing that you need to do to build your U-Boot SPL with DDR_INTERACTIVE is explained in the chapter 5 of this page (you must expand the chapter that is not displayed by default): https://wiki.st.com/stm32mpu/wiki/STM32MP15_U-Boot#SPL_compilationYou have to use the basic config and not the trusted one:PC $> make stm32mp15_basic_defconfigand add the DDR_INTERACTIVE option in the make command:PC $> make DEVICE_TREE=stm32mp157c-dk2 DDR_INTERACTIVE=1 allAnd that's all!You obtain your two files:u-boot-spl.stm32 : FSBL = SPL binary with STM32 image header, loaded by ROM codeu-boot.img : SSBL = U-Boot binary with U-Boot image header (uImage), loaded by SPLI'm sorry for all the other answers that were not really related to your main question, but at least, I hope that you learnt things about "make menuconfig" and "FIP package".Hope it helps you,Regards,Kevin

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