Re: v4.1 to v4.7: regression in tsc2005 driver

From	Pavel Machek <pavel@ucw.cz>
Newsgroups	linux.kernel
Subject	Re: v4.1 to v4.7: regression in tsc2005 driver
Date	2016-07-20 22:30 +0200
Message-ID	<rX6hZ-67R-43@gated-at.bofh.it> (permalink)
References	(4 earlier) <rW0xY-59Z-13@gated-at.bofh.it> <rW3ct-6yi-1@gated-at.bofh.it> <rWN5D-26r-11@gated-at.bofh.it> <rWTb4-6fy-11@gated-at.bofh.it> <rX2xI-3I2-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Hi!

> > > > > > > > > drivers/input/touchscreen/tsc2005.c:	  input_dev->name = "TSC2005
> > > > > > > > > touchscreen";
> > > > > > > > > 
> > > > > > > > > to "TSC200X touchscreen". Unfortunately, X seems to propagate that
> > > > > > > > > name to userspace, where it is needed to be able to do
> > > 
> > > Technically X _is_ userspace.
> > 
> > There's "userspace running as root" and "userspace userspace" :-).
> 
> I do not really see any difference form the kernel POW. 
> 
> > 
> > > > > > > > > 
> > > > > > > > > xinput --set-prop --type=int ...
> > > > > > > > > 
> > > > > > > > > with the right arguments to calibrate touchscreen. (Touchscreen is
> > > > > > > > > unusable without calibration).
> > > > > > > > > 
> > > > > > > > > What to do with that?
> > > 
> > > Hmm, I do not think we ever committed for the device names to be stable.
> > > You are supposed to locate touchscreen device based on its properties
> > > and you might need some heuristic if you encounter a system with more
> > > than one such touchscreen.
> > 
> > Well, you are commited now, like it or not, X people did it for you
> > :-(.
> > 
> > Because there's no other reasonable way to use xinput --set-prop...
> 
> Well, X is going to have to fix it. How am I supposed to control my
> devices in multi-seat environment if I use the same hardware (or if I
> have device with multiple touchscreens)? They all will have the same
> name (well, all mice, then all keyboards, etc). Let's add Peter to the
> fold...

Well, if someone has such a multiseat config, they have a problem. But
in the meantime, I'd like to keep working system.

http://who-t.blogspot.cz/2016/07/xinput-resolves-device-names-and.html

And I see you replied in the blog. Good. Yes, X needs to be improved
to work nicely with multiseat. Still kernel needs to play nice and not
have regressions.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

Thread

v4.1 to v4.7: regression in tsc2005 driver Pavel Machek <pavel@ucw.cz> - 2016-07-17 20:00 +0200
  Re: v4.1 to v4.7: regression in tsc2005 driver Michael Welling <mwelling@ieee.org> - 2016-07-17 20:30 +0200
    Re: v4.1 to v4.7: regression in tsc2005 driver Pavel Machek <pavel@ucw.cz> - 2016-07-17 20:50 +0200
      Re: v4.1 to v4.7: regression in tsc2005 driver Michael Welling <mwelling@ieee.org> - 2016-07-17 21:00 +0200
        Re: v4.1 to v4.7: regression in tsc2005 driver Pavel Machek <pavel@ucw.cz> - 2016-07-17 22:10 +0200
          Re: v4.1 to v4.7: regression in tsc2005 driver Michael Welling <mwelling@ieee.org> - 2016-07-18 01:00 +0200
            Re: v4.1 to v4.7: regression in tsc2005 driver Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-07-20 02:00 +0200
              Re: v4.1 to v4.7: regression in tsc2005 driver Michael Welling <mwelling@ieee.org> - 2016-07-20 02:40 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-07-20 03:00 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Michael Welling <mwelling@ieee.org> - 2016-07-20 03:40 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-07-20 03:50 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Michael Welling <mwelling@ieee.org> - 2016-07-20 04:10 +0200
                [PATCH] Input: tsc200x - Report proper input_dev name Michael Welling <mwelling@ieee.org> - 2016-07-20 06:00 +0200
                Re: [PATCH] Input: tsc200x - Report proper input_dev name Pavel Machek <pavel@ucw.cz> - 2016-07-20 08:40 +0200
                Re: [PATCH] Input: tsc200x - Report proper input_dev name Pavel Machek <pavel@ucw.cz> - 2016-07-20 09:00 +0200
                Re: [PATCH] Input: tsc200x - Report proper input_dev name Michael Welling <mwelling@ieee.org> - 2016-07-20 09:10 +0200
                Re: [PATCH] Input: tsc200x - Report proper input_dev name Pavel Machek <pavel@ucw.cz> - 2016-07-20 09:50 +0200
                Re: [PATCH] Input: tsc200x - Report proper input_dev name Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-07-20 18:50 +0200
                Re: [PATCH] Input: tsc200x - Report proper input_dev name Pali Rohár <pali.rohar@gmail.com> - 2016-07-20 19:00 +0200
                Re: [PATCH] Input: tsc200x - Report proper input_dev name Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-07-20 19:10 +0200
                Re: [PATCH] Input: tsc200x - Report proper input_dev name Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-07-20 19:20 +0200
                Re: [PATCH] Input: tsc200x - Report proper input_dev name Pavel Machek <pavel@ucw.cz> - 2016-07-20 22:30 +0200
                Re: [PATCH] Input: tsc200x - Report proper input_dev name Pali Rohár <pali.rohar@gmail.com> - 2016-07-20 22:40 +0200
                Re: [PATCH] Input: tsc200x - Report proper input_dev name Michael Welling <mwelling@ieee.org> - 2016-07-20 09:00 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Pali Rohár <pali.rohar@gmail.com> - 2016-07-20 18:40 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Aaro Koskinen <aaro.koskinen@iki.fi> - 2016-07-20 03:30 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Michael Welling <mwelling@ieee.org> - 2016-07-20 04:20 +0200
              Re: v4.1 to v4.7: regression in tsc2005 driver Pavel Machek <pavel@ucw.cz> - 2016-07-20 08:30 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-07-20 18:30 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Pavel Machek <pavel@ucw.cz> - 2016-07-20 22:30 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Peter Hutterer <peter.hutterer@who-t.net> - 2016-07-20 23:50 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-07-21 00:30 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Peter Hutterer <peter.hutterer@who-t.net> - 2016-07-21 01:00 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Pavel Machek <pavel@ucw.cz> - 2016-07-21 08:40 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Peter Hutterer <peter.hutterer@who-t.net> - 2016-07-21 08:50 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Pavel Machek <pavel@ucw.cz> - 2016-07-21 11:00 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Pali Rohár <pali.rohar@gmail.com> - 2016-07-21 11:10 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Peter Hutterer <peter.hutterer@who-t.net> - 2016-07-22 02:20 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Pali Rohár <pali.rohar@gmail.com> - 2016-07-25 17:00 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Peter Hutterer <peter.hutterer@who-t.net> - 2016-07-22 02:20 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2016-07-22 03:00 +0200
                Re: v4.1 to v4.7: regression in tsc2005 driver Pali Rohár <pali.rohar@gmail.com> - 2016-07-25 17:00 +0200

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