Hi,

U-Boot SPL 2018.03-rc3-00111-g0cb2734156-dirty (Mar 06 2018 - 17:19:36 +0530)
Trying to boot from USB SDP
SDP: initialize...
SDP: handle requests...

and SPL reenumerated USB VID/PID as
[24774.255201] usb 1-2: new high-speed USB device number 101 using xhci_hcd
[24774.425174] usb 1-2: New USB device found, idVendor=0525, idProduct=b4a4
[24774.425181] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[24774.425185] usb 1-2: Product: USB download gadget
[24774.425189] usb 1-2: Manufacturer: FSL
[24774.433598] hid-generic 0003:0525:B4A4.005C: hiddev97,hidraw2: USB
HID v1.10 Device [FSL USB download gadget]

Now I've launched u-boot-dtb.img

$ imx_usb u-boot-dtb.img
...
vid=0x0525 pid=0xb4a4 file_name=mx6_usb_sdp_spl.conf
config file <.//mx6_usb_sdp_spl.conf>
parse .//mx6_usb_sdp_spl.conf
Trying to open device vid=0x0525 pid=0xb4a4
Interface 0 claimed
HAB security state: development mode (0x56787856)
== work item
filename /work/code/u-boot/u-boot-dtb.img
load_size 0 bytes
load_addr 0x00000000
dcd 1
clear_dcd 0
plug 1
jump_mode 2
jump_addr 0x00000000
== end work item

unknown load address
DoIRomDownload failed, err=-3
HAB security state: development mode (0x56787856)

Here is mx6_usb_sdp_spl.conf file
   mx6_spl_sdp
   hid,uboot_header,1024,0x910000,0x10000000,512M,0x00900000,0x40000

Look like the u-boot-dtb.img has FIT header and imx_usb can't process
the same, any help?

Jagan.

-- 
Jagan Teki
Free Software Engineer | www.openedev.com
U-Boot, Linux | Upstream Maintainer
Hyderabad, India.
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