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TMDSICE3359: Building custom MLO for AM335x

Jani Soderstrom
Prodigy 240 points
Part Number: TMDSICE3359

Hi,

I have created Linux images based on Yocto for TMDSICE3359 for the last half a year and modified also the device tree by using make in ti-processor-sdk-linux-am335x-evm-06.03.00.106/board-support/linux-4.19.94+gitAUTOINC+be5389fd85-gbe5389fd85 folder as make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am335x-icev2-prueth.dtb .

But now it seems that I should modify the MLO in FAT32 of SD card for our custom board because the DDR3 data pins are different than in ICE board. Do you have a note how to build MLO in the first place, and can you suggest where I can find the pin settings for DDR3?

Regards,

Jani

  • 0
    Prodigy 240 points

    Hi,

    Of course, I managed to find an answer to my first question after writing it. I found a link to e2e.ti.com/.../mlo-and-uboot-edit-and-boot-process which describes the steps and it was easy to have the same steps working with ti-processor-sdk-linux-am335x-evm-06.03.00.106

    Now I have compiled my custom MLO and tried it with the TMDSICE3359 and it works. But I still have to figure out the code changes due to changes to the DDR3 pins.

    Regards,

    Jani

  • 0 in reply to Jani Soderstrom
    TI__Guru 72495 points

    Hello Jani,

    Glad that you were able to find the steps to compile your custom MLO. If you need additional assistance on pin settings for DDR3, let us know. Otherwise, we will consider this thread answered.

    Regards,

    Nick

  • 0 in reply to Nick Saulnier
    Prodigy 240 points

    Hi Nick,

    I received our own board which has UART3 (console) in different pins than the evaluation board. I noticed that the second line what U-boot is printing out is like "CPU  : AM335X-GP rev 2.1" which is in print_cpuinfo function in arch/arm/mach-omap2/am33xx/sys_info.c

    Are you able to say where this function is called or where is the console pin setup?

    I guess that I can continue with the DDR3 after I get the console to work properly.

    Regards,

    Jani