Hi WayneWWW,
1.Why and how does this issue happen to your board only but not to other users’ carrier board.
Is there any special design on your board that causes this problem?
Our board just connects USB2_D_N/P (Pins 121/123) to Embedded-HUB directly.
I found similar issues below.
2.Why do you check cboot? Do you need the usb functionality in cboot?
No, it’s not necessary at all. We want to disable usb detection at CBoot.
But source code of CBoot is non-public.
Now we only use following prebuild binary in L4T.
Linux_for_Tegra/bootloader/t210ref/cboot.bin
Could you tell me how to disable usb init in CBoot?
If you don’t need it, is disabling usb init in cboot could resolve this issue?
Even if nothing is connected to USB2 port in Bootloader,
the -71 error occurs if a USB device is connected after booting Linux Kernel.
I think this is because PLL_U(0x600060c0) irregular value still remain after booting Linux Kernel.