Re: [PATCH v4 03/10] input: elants: remove unused axes

From: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
To: Dmitry Osipenko <digetx@gmail.com>
Cc: David Heidelberg <david@ixit.cz>,
	Dmitry Torokhov <dmitry.torokhov@gmail.com>,
	Henrik Rydberg <rydberg@bitmath.org>,
	James Chen <james.chen@emc.com.tw>,
	Johnny Chuang <johnny.chuang@emc.com.tw>,
	Rob Herring <robh+dt@kernel.org>,
	Scott Liu <scott.liu@emc.com.tw>,
	linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 03/10] input: elants: remove unused axes
Date: Sun, 26 Apr 2020 19:29:54 +0200	[thread overview]
Message-ID: <20200426172954.GA15436@qmqm.qmqm.pl> (raw)
In-Reply-To: <0f66e93c-9c71-73d0-90b8-15e0802a79c5@gmail.com>

On Sun, Apr 26, 2020 at 07:35:47PM +0300, Dmitry Osipenko wrote:
> 26.04.2020 19:11, Michał Mirosław пишет:
> > Driver only ever reports MT events and input_mt_init_slots() sets up
> > emulated axes already.  Clear the capabilities not generated directly
> > and move MT axes setup, so they are visible by input_mt_init_slots().
> > 
> > Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
> > Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
> > Tested-by: Dmitry Osipenko <digetx@gmail.com>
> > ---
> > v4: reword commitmsg; reorder axis setup
> > ---
> 
> Legacy pointer emulation doesn't work using v4. I think it will be
> better to drop this patch for now and add this hunk to the patch #4:

Have you tried it together with the next patch? It adds
touchscreen_parse_properties() to initialize axes also from DT, and
should be equivalent to the hunk you proposed.

[...]
> Maybe input_mt_init_slots() could be changed to set up all the
> properties that are needed for the legacy pointer, but I'm not 100% sure
> because not very familiar with that code. Perhaps Dmitry Torokhov could
> clarify?

The code of input_mt_init_slots() looks like it does initialize the
properties needed. What does evtest return with and without the patches?

Best Regards
Michał Mirosław