linux-kernel - Re: [PATCH][RFC] input: remove bios I8042_CTR

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Date:	Tue, 27 Oct 2009 22:43:10 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Dave Young <hidave.darkstar@...il.com>
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Vojtech Pavlik <vojtech@...e.cz>
Subject: Re: [PATCH][RFC] input: remove bios I8042_CTR_XLATE check to make
	keyboard usable

Hi Dave,

On Tue, Oct 27, 2009 at 01:34:04PM +0800, Dave Young wrote:
> 
> Pressing somekey at early booting phase cause keyboard to be not usable
> (The hardware is DELL latitude e5400):
> 
> atkbd.c: Unknown key pressed (raw set 2, code 0xd3 on isa0060/serio0).
> atkbd.c: Use 'setkeycodes e053 <keycode>' to make it known.
> atkbd.c: Unknown key pressed (raw set 2, code 0x1d3 on isa0060/serio0).
> atkbd.c: Use 'setkeycodes e053 <keycode>' to make it known.
> 
> i8042.c set i8042_direct to true when the controller init. But the result
> is keyboard not usable, The only option is press the power button to shutdown. 
> 
> So here remove the bios check to fix it.
> 

I would be a little hesitant to force translation by default on all
architectures, although it may make sense on x86...

Vojtech, you wrote the thing, do you see any issues with forcing
translation? I think most of the x86 boxes work in translated mode and
the only time it is in raw is when BIOS screwed up initialization.

> Signed-off-by: Dave Young <hidave.darkstar@...il.com>
> ---
>  drivers/input/serio/i8042.c |    8 --------
>  1 file changed, 8 deletions(-)
> 
> --- linux-2.6.orig/drivers/input/serio/i8042.c	2009-10-13 08:57:07.000000000 +0800
> +++ linux-2.6/drivers/input/serio/i8042.c	2009-10-27 13:15:13.000000000 +0800
> @@ -869,14 +869,6 @@ static int i8042_controller_init(void)
>  	spin_unlock_irqrestore(&i8042_lock, flags);
>  
>  /*
> - * If the chip is configured into nontranslated mode by the BIOS, don't
> - * bother enabling translating and be happy.
> - */
> -
> -	if (~i8042_ctr & I8042_CTR_XLATE)
> -		i8042_direct = true;
> -
> -/*
>   * Set nontranslated mode for the kbd interface if requested by an option.
>   * After this the kbd interface becomes a simple serial in/out, like the aux
>   * interface is. We don't do this by default, since it can confuse notebook

-- 
Dmitry
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