Re: [PATCH] input: touchscreen: use polling mode in 88pm860x

[Dmitry Torokhov]

On Mon, Mar 14, 2011 at 05:41:35AM -0700, Haojian Zhuang wrote:
> 
> 
> >-----Original Message-----
> >From: Dmitry Torokhov [mailto:dmitry.torokhov@xxxxxxxxx]
> >Sent: 2011å3æ13æ 2:44 PM
> >To: Haojian Zhuang
> >Cc: johnpol@xxxxxxxxxxx; sameo@xxxxxxxxxxxxxxx; a.zummo@xxxxxxxxxxxx;
> >lrg@xxxxxxxxxxxxxxx; broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx;
> >rpurdie@xxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
> >Subject: Re: [PATCH] input: touchscreen: use polling mode in 88pm860x
> >
> >On Mon, Mar 07, 2011 at 11:43:14PM +0800, Haojian Zhuang wrote:
> >> Measuring point on touchscreen with IRQ mode can only monitor pen-down
> >> event. If finger is moving on touchscreen, it can't be monitored by
> >> IRQ pen-down event. So switch to polling mode after pen-down event.
> >>
> >
> >Instead of scheduling work you could stay in the interrupt handler
> >(which is a separate thread) and poll from it. Or is it a nested
> >interrupt and it is sharing the interrupt thread?
> >
> >Thanks.
> >
> >--
> >Dmitry
> 
> I'm using a nested interrupt. Do you mean that I should keep polling in the nested interrupt handler?
> 

No, I do not believe you can poll from the nested handler since I
believe it shares the thread with other interrupts. In non-nested case
you could though.

Thanks.

-- 
Dmitry
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