linux-kernel - Re: [PATCH v11 1/4] HID: wacom_sys: Add support for flipping the data values

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAKmqyKMpMCb4gLyp94rCgVBU3eccjafD8nF7y6o+oU6D-OHvTQ@mail.gmail.com>
Date:   Wed, 20 Oct 2021 11:44:50 +1000
From:   Alistair Francis <alistair23@...il.com>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Ping Cheng <pinglinux@...il.com>,
        Alistair Francis <alistair@...stair23.me>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        dl-linux-imx <linux-imx@....com>, Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        linux-input <linux-input@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v11 1/4] HID: wacom_sys: Add support for flipping the data values

On Wed, Oct 20, 2021 at 11:05 AM Dmitry Torokhov
<dmitry.torokhov@...il.com> wrote:
>
> On Wed, Oct 20, 2021 at 09:33:13AM +1000, Alistair Francis wrote:
> > On Tue, Oct 19, 2021 at 11:51 AM Dmitry Torokhov
> > <dmitry.torokhov@...il.com> wrote:
> > >
> > > We already have touchscreen-inverted-x/y defined in
> > > Documentation/devicetree/bindings/input/touchscreen/touchscreen.yaml,
> > > why are they not sufficient?
> >
> > The touchscreen-* properties aren't applied to HID devices though, at
> > least not that I can tell.
>
> No, they are not currently, but that does not mean we need to establish
> a new set of properties (property names) for HID case.

I can update the names to use the existing touchscreen ones.

Do you have a hint of where this should be implemented though?

Right now (without "HID: wacom: Add support for the AG14 Wacom
device") the wacom touchscreen is just registered as a generic HID
device. I don't see any good place in hid-core, hid-input or
hid-generic to invert the input values for this.

Even with my "HID: wacom: Add support for the AG14 Wacom device" patch
I don't see a good way of doing this without the raw data parsing.

Alistair

>
> Thanks.

>
> --
> Dmitry