linux-kernel - Re: [PATCH] Input: synaptics

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

Date:	Wed, 10 Sep 2014 01:07:02 +0200
From:	Hans de Goede <hdegoede@...hat.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Andrew Duggan <aduggan@...aptics.com>
CC:	linux-input@...r.kernel.org,
	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	Christopher Heiny <cheiny@...aptics.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Input: synaptics - add support for ForcePads

Hi,

On 09/10/2014 12:57 AM, Dmitry Torokhov wrote:
> On Tue, Sep 09, 2014 at 03:07:21PM -0700, Andrew Duggan wrote:
>> On 09/09/2014 10:06 AM, Dmitry Torokhov wrote:
>>> On Tue, Sep 09, 2014 at 09:44:17AM +0200, Hans de Goede wrote:
>>>> Hi,
>>>>
>>>> On 09/08/2014 06:55 PM, Dmitry Torokhov wrote:
>>>>> ForcePads are found on HP EliteBook 1040 laptops. They lack any kind of
>>>>> physical buttons, instead they generate primary button click when user
>>>>> presses somewhat hard on the surface of the touchpad. Unfortunately they
>>>>> also report primary button click whenever there are 2 or more contacts
>>>>> on the pad, messing up all multi-finger gestures (2-finger scrolling,
>>>>> multi-finger tapping, etc). To cope with this behavior we introduce a
>>>>> delay (currently 50 msecs) in reporting primary press in case more
>>>>> contacts appear.
>>>>>
>>>>> For now we are using DMI matching to detect ForcePads, hopefully we'll
>>>>> be able to figure a better way down the road.
>>>> What about using the pnp-id, in my experience with the recent lenovo
>>>> laptops that tends to be more reliable.
>>> Not sure. So far I only know of HP 1040 having it. FWIW:
>>>
>>> dtor@...r-glaptop:~$ cat /sys/bus/pnp/drivers/i8042\ aux/00\:07/id
>>> SYN300d
>>> SYN0100
>>> SYN0002
>>> PNP0f13
>>>
>>> I think if we see generalities we can switch over later. I hope
>>> Chris/Andrew will come with a capability bit though :)
>>
>> The ForcePad capabilities bit is 1 << 15.
> 
> Awesome, thanks!
> 
> Then I guess the patch below is what we'll be needing for these devices.

Yep, the patch looks good to me.

Regards,

Hans
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/