USB Hub resets - EG25 / Pinephone Pro

USB Hub resets - EG25 / Pinephone Pro

[Adam Pigg]

Hi

Im just really seeking some ideas on how to handle the modem in the pinephone 
pro.

Initially, all is good, and the modem works, however, after enabling power 
management and allowing the phone to suspend/resume, ive hit a problem where 
on resume, the usb hun the modem is connected to resets.  This causes the 
modem to dissapear/reappear.

When it re-appears, my debugging has found that devices probed initially are 
now not present (a usbmisc and wwan device), however, the 3 modem tty devices 
are there. See below from some debug logs

This causes the ofono plugin to not register a device (the wwan device is 
required for this), which isnt ideal on a mobile phone.

Any ideas are welcomed on how to handle this.

Kind Regards

Adam Pigg




    On Boot:
    May 08 18:14:10 PinePhonePro ofonod[353]: plugins/udevng.c:create_modem() 
/sys/devices/platform/fe3c0000.usb/usb1/1-1
    May 08 18:14:10 PinePhonePro ofonod[353]: plugins/udevng.c:create_modem() 
driver=quectelqmi
    May 08 18:14:10 PinePhonePro ofonod[353]: src/modem.c:ofono_modem_create() 
name: (null), type: quectelqmi
    May 08 18:14:10 PinePhonePro ofonod[353]: plugins/
udevng.c:setup_quectelqmi() /sys/devices/platform/fe3c0000.usb/usb1/1-1
    May 08 18:14:10 PinePhonePro ofonod[353]: plugins/
udevng.c:setup_quectelqmi() /dev/ttyUSB0 255/255/255 00 (null) tty
    May 08 18:14:10 PinePhonePro ofonod[353]: plugins/
udevng.c:setup_quectelqmi() /dev/ttyUSB1 255/0/0 01 (null) tty
    May 08 18:14:10 PinePhonePro ofonod[353]: plugins/
udevng.c:setup_quectelqmi() /dev/ttyUSB2 255/0/0 02 (null) tty
    May 08 18:14:10 PinePhonePro ofonod[353]: plugins/
udevng.c:setup_quectelqmi() /dev/ttyUSB3 255/0/0 03 (null) tty
    May 08 18:14:10 PinePhonePro ofonod[353]: plugins/
udevng.c:setup_quectelqmi() /dev/cdc-wdm0 255/255/255 04 (null) usbmisc
    May 08 18:14:10 PinePhonePro ofonod[353]: plugins/
udevng.c:setup_quectelqmi() wwan0 255/255/255 04 (null) net
    May 08 18:14:10 PinePhonePro ofonod[353]: plugins/
udevng.c:setup_quectelqmi() qmi=/dev/cdc-wdm0 net=wwan0
    May 08 18:14:10 PinePhonePro ofonod[353]: plugins/
udevng.c:setup_quectelqmi() qmi=/dev/cdc-wdm0 net=wwan0
    ​
    ​
    On Resume:
    May 08 18:15:05 PinePhonePro ofonod[353]: plugins/
udevng.c:setup_quectelqmi() /sys/devices/platform/fe3c0000.usb/usb1/1-1
    May 08 18:15:05 PinePhonePro ofonod[353]: plugins/
udevng.c:setup_quectelqmi() /dev/ttyUSB0 255/255/255 00 (null) tty
    May 08 18:15:05 PinePhonePro ofonod[353]: plugins/
udevng.c:setup_quectelqmi() /dev/ttyUSB1 255/0/0 01 (null) tty
    May 08 18:15:05 PinePhonePro ofonod[353]: plugins/
udevng.c:setup_quectelqmi() /dev/ttyUSB2 255/0/0 02 (null) tty
    May 08 18:15:05 PinePhonePro ofonod[353]: plugins/
udevng.c:setup_quectelqmi() /dev/ttyUSB3 255/0/0 03 (null) tty
    May 08 18:15:05 PinePhonePro ofonod[353]: plugins/
udevng.c:setup_quectelqmi() qmi=(null) net=(null)
    ​