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TDA4VM: tiboot3.bin of SDK7.3 bootting failed using emmc-boot mode

Part Number: TDA4VM
Other Parts Discussed in Thread: TDA4,

Hi,

When we run the bootloader including tiboot3.bin, tispl.bin, u-boot.img and sysfw.itb in the 7.2 SDK  using EMMC-BOOT mode on our custom board, there is no problem.

After upgrading to SDK 7.3, it cannot be started using EMMC-BOOT mode.But if we use DFU/USB, SDK7.3's bootloader can boot our board.

After consulting the relevant tickets of e2e forum, We made the following attempts:

1) According to :https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1028163/faq-tda4vm-on-7-3-8-0-sdk-how-to-reduce-ddr-speed-to-3733-mts

    We reduced the frequency of DDR to 3733MTS, but the board still fails to start.

2) According to:https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1032456/tda4vm-the-program-run_app_multi_cam-sh-crashes-frequently-in-our-custom-tda4vm-board-using-sdk8-0-is-it-related-to-ddr-lp4-frequency/3818427?tisearch=e2e-sitesearch&keymatch=%252525252520user%25252525253A51195#3818427

We keep the DDR frequency at 4266MTS and do the change according to this suggestion, But the board still fails to start.

3) Reducing the ddr frequency to 3200 or even 3000MTS with the JacintoTm 7 DDRSS Register Configuration Tool, it still can't start.

4)Burnning the files including tispl.bin, u-boot.img and sysfw.itb with SDK7.3 and tiboot3.bin with SDK 7.2 to our board emmc and bootting our board using EMMC-BOOT mode.The TDA4 can be started successfully.It should be caused by the k3-j721e-ddr-evm-lp4-4266.dtsi file in tiboot3.bin.

So,does the JacintoTm 7 DDRSS Register Configuration Tool need to adjust hardware related parameters?Can Ti experts give me some help?