[PATCH 0/3] Improve touchscreen filters

Nelson Castillo nelsoneci at gmail.com
Mon Dec 8 19:46:39 CET 2008

On Mon, Dec 08, 2008 at 01:36:44PM +0000, Andy Green wrote:
> Somebody in the thread at some point said:
> | The following series make the touchscreen work better.
> | In my tests no additional filtering is required. More testing is needed.
> | Clicks with the finger seem to work well also.
> |
> | - Add one filter.
> | - Remove two filters.
> Thanks Nelson I sent these on stable-tracking.
> You mention on the other thread it's working fine without tslib
> mangling, what're your plans about the calibration aspect?

My current ts.conf file is:

  module_raw input grab_events=1
  module linear

Therefore I think it makes sense to do the calibration in the kernel.
It is very simple anyway (linear module).

We could add the following sysfs entries.

  /sys/class/touchscreen/calN ..
  /sys/class/input/touchscreen0/calN ..
  (I have to read more about the naming conventions, any hint
   will be appreciated).

By default we could:

  * Add the default calibration values for gta02 in


  * Add default calibration values that do not change the output
    of the touchscreen.

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