Re: [PATCH 2/2] eeepc-wmi: Add support for T101MT Home/Express Gate key

[Dmitry Torokhov <dmitry.torokhov@gmail.com>]

On Fri, Mar 25, 2011 at 01:58:24PM -0500, Seth Forshee wrote:
> On Fri, Mar 25, 2011 at 10:03:33AM -0700, Dmitry Torokhov wrote:
> > > So, would the following make sense (KEY_TBD is may abbreviation for "key
> > > to be determinded"):
> > > 
> > >  - On press (0xe4), send KEY_TBD, value = 1
> > >  - On hold (0xea), send KEY_TBD, value = 2
> > >  - On release (0xe5), send KEY_TBD, value = 0
> > 
> > Yes.
> 
> There's a little problem with this. The driver uses sparse-keymap, which
> calls input_report_key(), which is doing this:
> 
> 	input_event(dev, EV_KEY, code, !!value);

Ah, right, it really did not have in mind passing on auto-repeating keys
as is when it was written.

> 
> I don't see the hold events in userspace, so they must be getting
> dropped as duplicates as you suggested.
> 
> I'm not sure who is at fault here. Should input_report_key() not be
> forcing value to 0 or 1? Or should sparse-keymap be calling
> input_event() directly? Or is sparse-keymap the wrong tool for handling
> keys this way?

I do not thik we shoudl burden sparse-keymap with handling repeats. Just
mark the device as auto-repeating (by setting EV_REP bit) and let input
core autorepeat logic do it for you.

Thanks.

-- 
Dmitry