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Linux/TDA2PXEVM: how to support 1G DDR on the TDA2PXEVM board

terence xia
Genius 3105 points
Part Number: TDA2PXEVM

Tool/software: Linux

Hello，

We are ready to support 1G DDR  on our board. It need to config emif. Which file we need to change in uboot or kernel? Is there any patch for this issue? 

Thanks a lot

Terence

  • 0
    TI__Mastermind 42515 points

    Hi Terence,

    do you use VisionSDK Linux? It is configured by default for 1GB.

    Also you can look at this application note:

    Regards,

    Yordan

  • 0 in reply to Yordan Kamenov
    Genius 3105 points

    Hi Yordan,

    Yes, we use the visionSDK 03 05. According  to your application note, also we know that it should modify the board/ti/dra7xx/evm.c  file, but we don't find the configuration of dmm_lisa_map_regs about 1G ddr.  We  need to use emif0 and emif1, each one map 512M DDR. So we try to add below code in evm.c, is it right?

    On the other hand, I don't understand what does the .is_ma_present = 0x1 mean?

    Thanks

    Terence

    ===============================================================

    static const struct dmm_lisa_map_regs lisa_map_dra7_1024MB = {
     .dmm_lisa_map_0 = 0x80500100,
     .dmm_lisa_map_1 = 0xC0500200,
     .dmm_lisa_map_2 = 0x0,
     .dmm_lisa_map_3 = 0x0,
     .is_ma_present = 0x1
     };

    ===========================================================

  • 0 in reply to terence xia
    TI__Genius 14650 points

    Hi Terence,

    Please modify the macro board_ti_get_emif_size defined in board/ti/dra7xx/evm.c in u-boot to return the DDR available on your setup. This will automatically configure the lisa map registers correctly and provide the correct EMIF settings.

    Regards

    Shravan