linux-kernel - Re: v4.1 to v4.7: regression in tsc2005 driver

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Date:	Thu, 21 Jul 2016 08:32:34 +0200
From:	Pavel Machek <pavel@....cz>
To:	Peter Hutterer <peter.hutterer@...-t.net>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Michael Welling <mwelling@...e.org>,
	kernel list <linux-kernel@...r.kernel.org>,
	linux-input@...r.kernel.org, pali.rohar@...il.com, sre@...nel.org,
	aaro.koskinen@....fi, ivo.g.dimitrov.75@...il.com,
	patrikbachan@...il.com, serge@...lyn.com
Subject: Re: v4.1 to v4.7: regression in tsc2005 driver

Hi!

> > In the mean time you can adjust the name or use XID instead.
> 
> X has partially fixed this a few years ago. All input drivers (that
> matter) export a Device Node property that sets the device node for each
> device.
> 
>  $ xinput list-props "SynPS/2 Synaptics TouchPad" | grep "Device Node"
>         Device Node (261):      "/dev/input/event4"
> 
> Based on that you can get the udev device and work your way into any of the
> sysfs tree. Or do whatever else you want.
> 
> But other than that there isn't anything in X to fix. xinput is primarily a
> debugging tool and it does name resolution for convenience. But it's not a
> tool for complex configurations. It does exactly what it needs to do, if you
> need something that's more complicated and relies on information not
> available to the X device itself then you'll need to write a custom tool
> that does what you need. sorry.

Ok.. so out of the box, touchscreen is "upside down" and miscalibrated
on n900. So I need to run

xinput --set-prop --type=float 8 115  1.10 0.00 -0.05  0.00 1.18 -0.10 0.00 0.00 1.00
xinput --set-prop --type=int 8 249 0 1

(or equivalent with names) so that I can use the touchscreen. (And
that's quite important -- X is somehow unusable without pointing
device).

If xinput is not the right solution, what is the right solution?

Thanks,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html