Re: [PATCH 02/12] Input: synaptics - do not invert y if 0

Henrik Rydberg
2011-07-05T18:05:22Z

> > > In some cases, however, y = 0 is sent by the touchpad.
> > > In these cases, the kernel driver should not invert, and just report 0.
> > >
> > > This patch also refactors the inversion into a macro, and moves it
> > > into packet processing instead of during position reporting.
> >
> > The patch seems to invert the current output?
>
> By 'current' do you mean referenced from the previous implementation?
> Or referenced from the raw input.
> It does indeed invert the raw input.
> This is the same as the previous implementation did.
> The difference is that it does not also invert the special 'y=0' into
> an arbitrarily large value.
> Is this your concern?

It would be clearer to just change the argument of the
input_report_abs() instances, would it not? An explanation why zero,
outside the value range, should be output also needs a rationale. It
would seem such packets should be masked somehow.

Thanks,
Henrik