Re: [PATCH] Input: synaptics - add support for ForcePads

[Hans de Goede]

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@dtor-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
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