linux-kernel - Re: [PATCH v3] HID: quirks: Add USB_QUIRK_IGNORE_REMOTE

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Date:   Fri, 4 Sep 2020 13:16:42 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     PengHao <penghao@...ontech.com>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org
Cc:     johan@...nel.org, dlaz@...omium.org, stern@...land.harvard.edu,
        kerneldev@...smulder.nl, jonathan@...ox.net, tomasz@...esinski.eu
Subject: Re: [PATCH v3] HID: quirks: Add USB_QUIRK_IGNORE_REMOTE_WAKEUP quirk
 for BYD zhaoxin notebook

Hi,

On 9/4/20 12:38 PM, PengHao wrote:
> Hi, Hans
> 
> Thanks for the review. And sorry for I'm not really familiar with
> mailing list, so didn't reply early.
> 
> Actually the reason why I submit this patch, is the vendor ask we do
> this, they do not want enable touchpad wakeup.
> 
> And yes, this device use hid-multitouch.

Right, I already suspected that. I guess they might be seeing
a similar issue as what I am seeing on the Asus T101HA.

Here when closed the lid comes to close to the touchpad and
it starts sending spurious events, resulting in immediate
wakeup from suspend.

I have a workaround patch for that issue here:

https://github.com/jwrdegoede/linux-sunxi/commit/cb3a4c23b94bc3646953d00cea183d4e8fddeea0

As the commit message explains that patch is not yet
ready for upstream. It should probably be modified to
only disable the touchpad this way when remote-wakeup is
disabled (at which point it mainly becomes a power-saving
feature).

So if the BYD zhaoxin notebook has the same issue, then
adding a quirk to disable remote-wakeup is likely still the
right thing to do. But first I would like to understand the
problem better.

Regards,

Hans



> 
> 
> 在 2020/9/4 下午6:05, Hans de Goede 写道:
>> Hi,
>>
>> On 9/4/20 11:13 AM, Penghao wrote:
>>> Add a USB_QUIRK_IGNORE_REMOTE_WAKEUP quirk for the BYD zhaoxin notebook.
>>> This notebook come with usb touchpad. And we would like to disable
>>> touchpad
>>> wakeup on this notebook by default.
>>
>> You are still not explaining why this is necessary ?
>>
>> And you did not answer my question if this touchpad is using hid-multitouch
>> either ?
>>
>> So NACK (rejection) from me until both questions are answered. The commi
>> message for a quirk should always explain why a quirk is necessary and
>> "we would like to disable touchpad wakeup on this notebook by default"
>> does not explain why you want to do that.
>>
>> Regards,
>>
>> Hans
>>
>>
>>
>>>
>>> Signed-off-by: Penghao <penghao@...ontech.com>
>>> ---
>>>
>>> Changes since v2:
>>>    - Add changes
>>>
>>> Changes since v1:
>>>    - Add the entries sorted by vendor ID and product ID.
>>>
>>>    drivers/usb/core/quirks.c | 4 ++++
>>>    1 file changed, 4 insertions(+)
>>>
>>> diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
>>> index 7c1198f80c23..fffe1f7f1098 100644
>>> --- a/drivers/usb/core/quirks.c
>>> +++ b/drivers/usb/core/quirks.c
>>> @@ -393,6 +393,10 @@ static const struct usb_device_id
>>> usb_quirk_list[] = {
>>>        /* Generic RTL8153 based ethernet adapters */
>>>        { USB_DEVICE(0x0bda, 0x8153), .driver_info = USB_QUIRK_NO_LPM },
>>>    +    /* SONiX USB DEVICE Touchpad */
>>> +    { USB_DEVICE(0x0c45, 0x7056), .driver_info =
>>> +            USB_QUIRK_IGNORE_REMOTE_WAKEUP },
>>> +
>>>        /* Action Semiconductor flash disk */
>>>        { USB_DEVICE(0x10d6, 0x2200), .driver_info =
>>>                USB_QUIRK_STRING_FETCH_255 },
>>>
>>
>>
>>
>>
>>
> 
>