Re: [PATCH 1/3] backlight: Allow drivers to update the core, andgenerate events on changes

[Pavel Machek]

> > > You want smoothing even in a default policy, and doing that well might 
> > > be a bit much for the kernel?
> > > 
> > sorry, I don't understand.
> > do you mean that there should be a default policy in the kernel?
> 
> No, I mean that the only default policy you could reasonably have in the 
> kernel would be tying the backlight directly to the ALS. And that sucks. 
> You need some degree of smoothing, and that's a job better left to 
> userspace.

How would that be done? Wake up userspace 100times a second so it can
read an integer and ardd it to running average?

Is ALS device stupid sensor, or can it do some smoothing/watermarks
itself?
									Pavel

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