How to disable the USB debug messages on UART terminal - i.MX8QXP

[AndreSilva]

Hi,

my UART terminal is being flooded with USB debug messages as soon as I connect any cable on it:

[ 28.823118] xhci-hcd xhci-hcd.1.auto: irq 165, io mem 0x5b130000
[ 28.830427] hub 1-0:1.0: USB hub found
[ 28.834284] hub 1-0:1.0: 1 port detected
[ 28.839056] xhci-hcd xhci-hcd.1.auto: xHCI Host Controller
[ 28.844920] xhci-hcd xhci-hcd.1.auto: new USB bus registered, assigned bus number 2
[ 28.852877] xhci-hcd xhci-hcd.1.auto: Host supports USB 3.0 SuperSpeed
[ 28.859665] usb usb2: We don't know the algorithms for LPM for this host, disabling LPM.
[ 28.868855] hub 2-0:1.0: USB hub found
[ 28.873085] hub 2-0:1.0: 1 port detected
[ 29.365942] xhci-hcd xhci-hcd.1.auto: remove, state 4
[ 29.371051] usb usb2: USB disconnect, device number 1
[ 29.377215] xhci-hcd xhci-hcd.1.auto: USB bus 2 deregistered
[ 29.383310] xhci-hcd xhci-hcd.1.auto: remove, state 4
[ 29.388632] usb usb1: USB disconnect, device number 1
[ 29.395997] xhci-hcd xhci-hcd.1.auto: USB bus 1 deregistered
[ 29.611580] xhci-hcd xhci-hcd.1.auto: xHCI Host Controller
[ 29.617184] xhci-hcd xhci-hcd.1.auto: new USB bus registered, assigned bus number 1
[ 29.625420] xhci-hcd xhci-hcd.1.auto: hcc params 0x200073c8 hci version 0x100 quirks 0x0000002200018010 

is there anyway to disable it ? the terminal is unusuable while the messages are being printed.

my distro, Yocto - Gatesgarth (from code aurora):

Linux imx8qxpc0mek 5.10.9-1.0.0+g32513c25d8c7 #1 SMP PREEMPT Tue Mar 9 02:17:18 UTC 2021 aarch64 aarch64
aarch64 GNU/Linux

Thanks,

Andre

[b36401]

You can use "dmesg -n 1" command to disable all messages from the kernel (and its drivers) except panic messages to be appearing on the terminal.

[AndreSilva]

Thanks for your support, 

Regarding the messages, it looks like the usb OTG is not working correctly, I am not able to get any device enumerated. Can you check it ? I already checked 5.4.70 and 5.4.47 bsps. All the same 

Regards,

Andre