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

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: <CAKdAkRSYxM0_JOD-fR_n49PFxPUbZbVZ4nDqhgzm=HzCb8FQHg@mail.gmail.com>
Date:	Thu, 21 Jul 2016 17:57:55 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Peter Hutterer <peter.hutterer@...-t.net>
Cc:	Pavel Machek <pavel@....cz>, Michael Welling <mwelling@...e.org>,
	kernel list <linux-kernel@...r.kernel.org>,
	"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
	Pali Rohár <pali.rohar@...il.com>,
	Sebastian Reichel <sre@...nel.org>,
	"aaro.koskinen@....fi" <aaro.koskinen@....fi>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Patrik Bachan <patrikbachan@...il.com>, serge@...lyn.com
Subject: Re: v4.1 to v4.7: regression in tsc2005 driver

On Thu, Jul 21, 2016 at 5:10 PM, Peter Hutterer
<peter.hutterer@...-t.net> wrote:
> On Thu, Jul 21, 2016 at 10:54:21AM +0200, Pavel Machek wrote:
>> Should we have calibration info in the device tree, with kernel
>> passing it to the x?
>>
>> Should kernel somehow do the calibration itself?
>
> if the kernel knows about the calibration it would make more sense to just
> do it in the kernel directly.

Historically we relied on userspace to perform
calibration/transformation. Lately we've been introducing trivial
transformations (inversion and axes swapping) and we allow plumbing
this though DT; the rest I think is still better done in userspace
(where you can do floating point, if desired).

> but for anything even remotely run-time or
> user-configured the xorg.conf snippet is the best solution.

Thanks.

-- 
Dmitry