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TDA4VH-Q1: Using DFU to flash prebuild/

Part Number: TDA4VH-Q1


Tool/software:

Hi Ti expert

Test base on SDK version: 10.1
Board: J784S4_EVM

I want to use dfu-util tool to flash prebuild/ imgs in ospi_flash and boot from ospi.

I have two questions:
<1> , when I use first flash by DFU, in uboot: I can not  saveenv:


    

<2>,  when I use follow command in uboot:

  => env default -f -a
  =>  setenv dfu_alt_info ${dfu_alt_info_ospi}
  => dfu 0 sf 0:0

HOST $ :    sudo ./dfu-util -l

1)  As far as I know, J784s4 no sysfw.itb, So I don't need to flash sysfw.itb, right?

2)  I can not find u-boot-env in prebuild/
      
      How can I get u-boot-env?

Regards
Eason