linux-kernel - Re: [RFC/RFT] Remove polling timer from i8042

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Date:	Fri, 28 Jul 2006 01:44:23 +0200
From:	Vojtech Pavlik <vojtech@...e.cz>
To:	Dmitry Torokhov <dtor@...ightbb.com>
Cc:	linux-kernel@...r.kernel.org, Dave Jones <davej@...hat.com>
Subject: Re: [RFC/RFT] Remove polling timer from i8042

On Thu, Jul 27, 2006 at 12:29:04AM -0400, Dmitry Torokhov wrote:
> Hi,
> 
> OK, I had it in works for quite some time and Dave's talk in Ottawa
> made me finish it ;)

Good work.

However I believe you need to test the AUX IRQ in this case before you
use it, otherwise you'll have a lot of people with non-working keyboards
(the input queue is shared), and probably also non-working PCI cards
(BIOSes like to assign IRQ12 to PCI if no mouse is detected by the
BIOS).

You'll see whether this test is necessary if a lot of people report
problems without i8042.noaux.

That can only be seen after extensive testing on a lot of machines,
though. Fortunately 386's and 486's are more or less extinct now, and
with them a lot of the weirder keyboard controllers.

Btw, on standard x86, the AUX and KBD IRQs cannot be shared.

> -- 
> Dmitry
> 
> Input: i8042 - get rid of polling timer
> 
> Remove polling timer that was used to detect keybord/mice hotplug and
> register both IRQs right away instead of waiting for a driver to
> attach to a port. If mouse is really missing and IRQ can be used for
> something else user can boot with i8042.noaux. 

-- 
Vojtech Pavlik
Director SuSE Labs
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