Re: [PATCH] Synaptics TouchPad driver for 2.5.70

[Vojtech Pavlik <vojtech@suse.cz>]

On Sun, Jun 15, 2003 at 02:18:57PM +0200, Peter Osterlund wrote:
> Vojtech Pavlik <vojtech@suse.cz> writes:
> 
> > > * Multi finger tapping.
> > > * Vertical and horizontal scrolling.
> > > * Edge scrolling during drag operations.
> > > * Palm detection.
> > > * Corner tapping.
> > 
> > ... you may want to put these nice features into the mousedev.c driver
> > for now, so that the touchpad works with standard XFree without the
> > event based driver.
> 
> No need. There is now a working XFree86 driver here:
> 
>         http://w1.894.telia.com/~u89404340/touchpad/index.html

Cool.

> diff -u -r -N --exclude='.*' --exclude='*.o' --exclude='*.ko' --exclude='*~' ../../linus/main/linux/drivers/input/mouse/Kconfig linux/drivers/input/mouse/Kconfig
> --- ../../linus/main/linux/drivers/input/mouse/Kconfig	Sun Jun 15 14:10:15 2003
> +++ linux/drivers/input/mouse/Kconfig	Sun Jun 15 13:53:38 2003
> @@ -37,7 +37,7 @@
>  	  This touchpad is found on many modern laptop computers.
>  	  Note that you also need a user space driver to interpret the data
>  	  generated by the kernel. A compatible driver for XFree86 is available
> -	  from http://...
> +	  from http://w1.894.telia.com/~u89404340/touchpad/index.html

Perfect.

>>  
> -	if (hw.w != priv->old_w) {
> -		input_event(dev, EV_MSC, MSC_GESTURE, hw.w);
> -		priv->old_w = hw.w;
> -	}
> +	/*
> +	 * This will generate an event even if w is unchanged, but that is
> +	 * exactly what we want, because user space drivers may depend on
> +	 * this for gesture decoding.
> +	 */
> +	input_event(dev, EV_MSC, MSC_GESTURE, hw.w);

This assumption is not nice. It should instead rely on input_sync() /
EV_SYN, SYN_REPORT events for complete packet decoding. Can you do
something about that?

---

By the way, obviously you're skilled in X driver programming. Could you
possibly also implement an /dev/input/event mouse and tablet/touchscreen
drivers so that mousedev.c would be replaced completely?

-- 
Vojtech Pavlik
SuSE Labs, SuSE CR