linux-kernel - Re: Alps touchpad generates IRQ storm after S3

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Date:   Wed, 28 Aug 2019 22:43:33 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     Mario.Limonciello@...l.com
Cc:     xiaojian.cao@...alps.com, masaki.ota@...salpine.com,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        naoki.saito@...salpine.com
Subject: Re: Alps touchpad generates IRQ storm after S3

Hi Mario,

at 21:25, <Mario.Limonciello@...l.com> <Mario.Limonciello@...l.com> wrote:

> KH,
>
> Just make sure I understand details.
>
>> Commit "HID: i2c-hid: Don't reset device upon system resume
>
> If you revert this it's fixed on this system?

Yes. Once reset is used instead of  the issue is gone.

>
> In that commit you had mentioned if this causes problems it might be worth
> quirking just Raydium but commit afbb1169ed5b58cfca017e368b53e019cf285853
> confirmed that it helped several other systems too.
>
> If the conclusion from this investigation this is only fixable via  
> touchpad FW update
> it might be worth quirking this touchpad/touchpad FW/system combination.

Hopefully there’s a better solution from ALPS :)

>
>> Also Cc Mario because this could relate to BIOS.
>
> Also I assume this is on current stable BIOS/EC release, right?

Yes. The BIOS version is 1.10.1.

The IRQ storm stops as soon as the touchpad gets touched.

Kai-Heng

>
> Thanks,
>
>> -----Original Message-----
>> From: Kai-Heng Feng <kai.heng.feng@...onical.com>
>> Sent: Wednesday, August 28, 2019 1:58 AM
>> To: Xiaojian Cao
>> Cc: Masaki Ota; Limonciello, Mario; open list:HID CORE LAYER; Linux Kernel
>> Mailing List; Naoki Saito
>> Subject: Re: Alps touchpad generates IRQ storm after S3
>>
>>
>> [EXTERNAL EMAIL]
>>
>> Hi Xiaojian,
>>
>> at 14:51, Xiaojian Cao <xiaojian.cao@...alps.com> wrote:
>>
>>> Hi Ota-san,
>>>
>>> OK, we will look into it.
>>>
>>>
>>> Hi Kai-Heng,
>>>
>>> We will try to reproduce this issue first, could you please tell me the
>>> target Ubuntu version?
>>
>> It’s distro-agnostic, any distro with mainline Linux can reproduce the  
>> issue.
>>
>> Kai-Heng
>>
>>> Best regards,
>>> Jason
>>>
>>> -----Original Message-----
>>> From: 太田 真喜 Masaki Ota <masaki.ota@...salpine.com>
>>> Sent: Wednesday, August 28, 2019 2:35 PM
>>> To: 曹 曉建 Xiaojian Cao <xiaojian.cao@...alps.com>; Kai-Heng Feng
>>> <kai.heng.feng@...onical.com>
>>> Cc: Mario Limonciello <mario.limonciello@...l.com>; open list:HID CORE
>>> LAYER <linux-input@...r.kernel.org>; Linux Kernel Mailing List
>>> <linux-kernel@...r.kernel.org>; 斉藤 直樹 Naoki Saito
>>> <naoki.saito@...salpine.com>
>>> Subject: RE: Alps touchpad generates IRQ storm after S3
>>>
>>> Hi, Kai-Heng,
>>>
>>> Sorry, I'm not in charge of Linux task now.
>>>
>>> Hi, XiaoJian,
>>>
>>> Please check the following mail.
>>> If you have any question, please ask Kai-Heng.
>>>
>>> Best Regards,
>>> Masaki Ota
>>> -----Original Message-----
>>> From: Kai-Heng Feng <kai.heng.feng@...onical.com>
>>> Sent: Wednesday, August 28, 2019 3:22 PM
>>> To: 太田 真喜 Masaki Ota <masaki.ota@...salpine.com>
>>> Cc: Mario Limonciello <mario.limonciello@...l.com>; open list:HID CORE
>>> LAYER <linux-input@...r.kernel.org>; Linux Kernel Mailing List
>>> <linux-kernel@...r.kernel.org>
>>> Subject: Alps touchpad generates IRQ storm after S3
>>>
>>> Hi Masaki,
>>>
>>> The Alps touchpad (044E:1220) on Dell Precision 7530 causes IRQ storm
>>> after system suspend (S3).
>>> Commit "HID: i2c-hid: Don't reset device upon system resume” which solves
>>> the same issue for other vendors, cause the issue on Alps touchpad.
>>> So I’d like to know the correct command Alps touchpad expects after
>>> system resume.
>>>
>>> Also Cc Mario because this could relate to BIOS.
>>>
>>> Kai-Heng