linux-kernel - Re: [PATCH] hid/hid-multitouch: Keep latency normal on deactivate for reactivation gesture

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <2f418bd7-b1fe-442b-983b-6308cf32fe57@tuxedocomputers.com>
Date: Thu, 6 Nov 2025 19:19:00 +0100
From: Werner Sembach <wse@...edocomputers.com>
To: Benjamin Tissoires <bentiss@...nel.org>
Cc: Jiri Kosina <jikos@...nel.org>, linux-input@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] hid/hid-multitouch: Keep latency normal on deactivate for
 reactivation gesture


Am 06.11.25 um 17:50 schrieb Benjamin Tissoires:
> On Nov 06 2025, Werner Sembach wrote:
>> Uniwill devices have a built in gesture in the touchpad to de- and
>> reactivate it by double taping the upper left corner. This gesture stops
>> working when latency is set to high, so this patch keeps the latency on
>> normal.
>>
>> Signed-off-by: Werner Sembach <wse@...edocomputers.com>
>> ---
>> Or should I better implement this as a quirk?
> Yeah, I guess a quirk would be appreciated. The high latency on close
> was introduced on purpose for saving energy purpose. So this patch is
> rather not nice for those systems where it matters.

ack

v2 incoming

>
> Cheers,
> Benjamin
>
>>   drivers/hid/hid-multitouch.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
>> index 179dc316b4b51..df64cb6c41699 100644
>> --- a/drivers/hid/hid-multitouch.c
>> +++ b/drivers/hid/hid-multitouch.c
>> @@ -1998,7 +1998,7 @@ static void mt_on_hid_hw_open(struct hid_device *hdev)
>>   
>>   static void mt_on_hid_hw_close(struct hid_device *hdev)
>>   {
>> -	mt_set_modes(hdev, HID_LATENCY_HIGH, TOUCHPAD_REPORT_NONE);
>> +	mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_NONE);
>>   }
>>   
>>   /*
>> -- 
>> 2.43.0
>>