linux-kernel - Re: [PATCH] Input: synaptics add manual min/max quirk

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Date:	Fri, 28 Mar 2014 09:09:24 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc:	Christopher Heiny <cheiny@...aptics.com>,
	Andrew Duggan <aduggan@...aptics.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Peter Hutterer <peter.hutterer@...-t.net>,
	Stephen Chandler Paul <thatslyude@...il.com>,
	Hans de Goede <hdegoede@...hat.com>
Subject: Re: [PATCH] Input: synaptics add manual min/max quirk

On Fri, Mar 28, 2014 at 01:29:50AM -0700, Dmitry Torokhov wrote:
> On Fri, Mar 07, 2014 at 10:49:24AM -0500, Benjamin Tissoires wrote:
> > The new Lenovo Haswell series (-40's) contains a new Synaptics touchpad.
> > However, these new Synaptics devices report bad axis ranges.
> > Under Windows, it is not a problem because the Windows driver uses RMI4
> > over SMBus to talk to the device. Under Linux, we are using the PS/2
> > fallback interface and it occurs the reported ranges are wrong.
> > 
> > Of course, it would be too easy to have only one range for the whole
> > series, each touchpad seems to be calibrated in a different way.
> > 
> > We can not use SMBus to get the actual range because I suspect the firmware
> > will switch into the SMBus mode and stop talking through PS/2 (this is the
> > case for hybrid HID over I2C / PS/2 Synaptics touchpads).
> > 
> > So as a temporary solution (until RMI4 land into upstream), start a new
> > list of quirks with the min/max manually set.
> > 
> > Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
> > CC: stable@...r.kernel.org
> 
> 
> Applied, thank you.

That was giving compiler errors when configured without synaptics
support so I had fiddle with the patch a bit. I'll take full
responsibility for any breakage ;)

Thanks.

-- 
Dmitry
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