[PATCH 0/3] Make the touchscreen filtering optional.

Sven Rebhan odinshorse at googlemail.com
Wed Jan 28 22:29:01 CET 2009

2009/1/28 Andy Green <andy at openmoko.com>:

> If you want to improve that, feel free to send a patch.

I'm not really sure what the right approach would be, because i have
never seen a kernel option that allows you to enter a list of
operations to perform. If you have any hints, feel free to drop me a

> Why service hardware requirements based off an ISR in userspace when it
> can be decimated inside the ISR?  It's that which seems ass-backwards.

Is this really the case? I mean IMO the job of the kernel is to
interface hardware and to do things that can't be done in userspace
due to performance or hardware access reasons. So in my point of view,
the kernel should just send out the unfiltered evens and let userspace
decide what to do with it. And if userspace decides to do
finger-tracking via bayesian tracker, it is ok! But again, this is my
opinion and I also accept your (Nelson, Andy, Werner, etc) view. As
Werner said later in the thread: all arguments are written down...

 So let's look forward and find a better solution to the "compose a
custom filterchain" problem!


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