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

From: Dmitry Torokhov
Date: Thu Jul 21 2016 - 20:58:03 EST

On Thu, Jul 21, 2016 at 5:10 PM, Peter Hutterer
<peter.hutterer@xxxxxxxxx> 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.