DRA821U-Q1: DRA821U-Q1: DRA821-Q1 USB（HOST) test signal output command

from your earlier logs, we see this:

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 1370:3252 Swissbit unitedCONTRAST
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

[   15.471190] hub 1-0:1.0: USB hub found

[   15.482447] usb usb2: We don't know the algorithms for LPM for this host, disabling LPM.

[   15.492674] hub 2-0:1.0: USB hub found

These commands enable USB2.0 HS TX output. Are you not seeing that when you have the squid test fixture connected to the board and the scope? 

devmem2 0x06010480 w 0xA0;

devmem2 0x06010080 w 0x4;

devmem2 0x06010484 w 0x40000000.

I have already checked the commands below, but have not been able to confirm the eye pattern waveform.

devmem2 0x06010480 w 0xA0;

devmem2 0x06010080 w 0x4;

devmem2 0x06010484 w 0x40000000.

I would like to confirm that the above commands are properly applied and that the command information I enter is correct,
but I cannot find any materials that show me the register information.

Could you please tell me some materials where I can check the register information?
Also, could you tell me the command for sending packets to check the eye pattern of a USB 3.0 host?

Hi Hyukjun,

Please reference this other E2E thread where customer successfully entered compliance mode for USB3.0: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1448649/am67-how-to-enable-usb-test-mode-for-usb-2-0-and-usb-3-0-respectively/5804199#5804199

^ above tests were conducted on DRA821, AM67, and TDA4VH. For the register information, I did not find in DRA821 TRM, but TDA4VH TRM register information for USB should be applicable to DRA821. We have found the same register offsets are used for USB: https://www.ti.com/lit/zip/spruj52

Regards,

Takuma