On Thu, Dec 20, 2012 at 12:09:45AM +0100, Christophe TORDEUX wrote:
> From: Christophe TORDEUX <christophe@xxxxxxxxxxx>
>
> Apply the following change to the Sentelic touchpad driver:
> report only the position of the first finger as absolute non-MT
> coordinates, instead of reporting both fingers alternatively. Actual MT
> events are unaffected.
>
> Signed-off-by: Christophe TORDEUX <christophe@xxxxxxxxxxx>
> ----
>
> This is a much simpler version of my patch. Basically, it makes little
> sense to report both fingers alternatively, as long as it's non-MT
> events. With this approach, storing coordinates of the previously
> reported touch is not necessary. This patch is against kernel version
> 3.7. Works with a touchpad version STL3888_C0, very probably works on
> all later version, and very probably does not impact any earlier
> version. This patch has two effects:
> 1) fix horizontal and improve vertical scrolling, though maybe in a
> coincidental way and 2) work towards making the non-MT absolute events
> a purely legacy single finger fallback mode, without breaking anything.
OK, this makes a lot of sense and I will be applying this; thanks!
>
> diff -uprN -X vanilla/linux-3.7-rc8/Documentation/dontdiff vanilla/linux-3.7/drivers/input/mouse/sentelic.c linux-3.7/drivers/input/mouse/sentelic.c
> --- vanilla/linux-3.7/drivers/input/mouse/sentelic.c 2012-12-15 13:51:58.768136524 +0100
> +++ linux-3.7/drivers/input/mouse/sentelic.c 2012-12-19 23:26:49.289517251 +0100
> @@ -791,7 +791,7 @@ static psmouse_ret_t fsp_process_byte(st
> fsp_set_slot(dev, 0, fgrs > 0, abs_x, abs_y);
> fsp_set_slot(dev, 1, false, 0, 0);
> }
> - if (fgrs > 0) {
> + if (fgrs ==1 || (fgrs == 2 && !(packet[0] & FSP_PB0_MFMC_FGR2))) {
> input_report_abs(dev, ABS_X, abs_x);
> input_report_abs(dev, ABS_Y, abs_y);
> }
--
Dmitry
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