> On Nov 19, 2020, at 22:23, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > On Thu, Nov 19, 2020 at 10:12:02PM +0800, Kai-Heng Feng wrote: >> >> >>> On Nov 19, 2020, at 21:59, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: >>> >>> On Thu, Nov 19, 2020 at 09:41:32PM +0800, Kai-Heng Feng wrote: >>>> Hi penghao, >>>> >>>>> On Nov 19, 2020, at 20:17, 彭浩 <penghao@xxxxxxxxxxxxx> wrote: >>>>> >>>>> root@uos-PC:/sys/bus/usb/devices/usb7# dmesg >>>>> [ 0.000000] Linux version 4.19.0-6-amd64 (debian-kernel@xxxxxxxxxxxxxxxx) (gcc version 8.3.0 (Debian 8.3.0-6)) #1 SMP Uos 4.19.67-11eagle (2020-03-21) >>>> >>>> Thanks for the dmesg. But would it be possible to use mainline kernel enable dynamic debug? >>>> >>>> But anyway, this is not a regular AMD or Intel platform, so I guess we can merge the quirk as is... >>>> >>>> Kai-Heng >>>> >>>>> [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.19.0-6-amd64 root=UUID=e5a40c4f-d88e-4a4d-9414-a27892a31be7 ro splash console=ttyS0,115200n8 loglevel=7 DEEPIN_GFXMODE=0,1920x1080,1600x1200,1280x1024,1024x768 >>>>> [ 0.000000] Zhaoxin Linux Patch Version is V3.0.2 >>>>> [ 0.000000] With Zhaoxin Shanghai CPU patch V2.0.0 >>> >>> What do you mean "not a regular"? This is an x86-variant chip platform, >>> but what does that have to do with the USB quirk detection? >> >> USB quirk detection should work fine. I was trying to find the root cause, but seeing it's a Zhaoxin CPU, that could be the reason why mainline kernel, which has many USB power management fixes, wasn't used. >> >> penghao, is it possible to boot mainline kernel on Zhaoxin CPU? > > There have been a number of small patches for this type of CPU merged > over the past months, so I hope a mainline kernel works here :) > > That being said, why would the platform matter for a USB device quirk? No, it doesn't matter at all. Because I am not sure if it can boot a mainline kernel, and the author doesn't know how to enable dynamic debug to let us understand what really happens here. Kai-Hen > > thanks, > > greg k-h
