linux-kernel - Re: [PATCH] USB: quirks: Add USB_QUIRK_DISCONNECT_SUSPEND quirk forLenovo A630Z TIO built-in usb-audio card

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Date:   Thu, 19 Nov 2020 22:12:02 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     彭浩 <penghao@...ontech.com>,
        johan <johan@...nel.org>, jonathan <jonathan@...ox.net>,
        tomasz <tomasz@...esinski.eu>,
        Hans de Goede <hdegoede@...hat.com>,
        dlaz <dlaz@...omium.org>,
        "richard.o.dodd" <richard.o.dodd@...il.com>,
        kerneldev <kerneldev@...smulder.nl>,
        linux-usb <linux-usb@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] USB: quirks: Add USB_QUIRK_DISCONNECT_SUSPEND quirk
 forLenovo A630Z TIO built-in usb-audio card



> On Nov 19, 2020, at 21:59, Greg Kroah-Hartman <gregkh@...uxfoundation.org> 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@...ontech.com> wrote:
>>> 
>>> root@...-PC:/sys/bus/usb/devices/usb7# dmesg
>>> [ 0.000000] Linux version 4.19.0-6-amd64 (debian-kernel@...ts.debian.org) (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?

Kai-Heng

> 
> thanks,
> 
> greg k-h