Re: [PATCH v2] psmouse - focaltech report finger width to userspace

Dmitry Torokhov
2015-05-31T18:31:34Z

On Sat, May 30, 2015 at 05:10:45PM +0300, Dmitry Tunin wrote:
> Focaltech touchpads report finger width in packet[5] of absolute packet.
> Range for width in raw format is 0x10 - 0x70. Second half-byte is always 0.
> 0xff is reported, when a large contact area is detected.
> This can be handled in userspace.
>
> Signed-off-by: Dmitry Tunin <hanipouspilot@gmail.com>

Applied, thank you.

> ---
> drivers/input/mouse/focaltech.c | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> diff --git a/drivers/input/mouse/focaltech.c b/drivers/input/mouse/focaltech.c
> index 23d2594..ed2ec3b 100644
> --- a/drivers/input/mouse/focaltech.c
> +++ b/drivers/input/mouse/focaltech.c
> @@ -105,6 +105,16 @@ struct focaltech_hw_state {
>
> /* True if the clickpad has been pressed. */
> bool pressed;
> +
> + /*
> + * Finger width 0-7 and 15 for a very big contact area.
> + * 15 value stays until the finger is released.
> + * Width is reported only in absolute packets.
> + * Since hardware reports width only for last touching finger,
> + * there is no need to store width for every specific finger, so
> + * we keep only last value reported.
> + */
> + unsigned int width;
> };
>
> struct focaltech_data {
> @@ -137,6 +147,7 @@ static void focaltech_report_state(struct psmouse *psmouse)
> input_report_abs(dev, ABS_MT_POSITION_X, clamped_x);
> input_report_abs(dev, ABS_MT_POSITION_Y,
> priv->y_max - clamped_y);
> + input_report_abs(dev, ABS_TOOL_WIDTH, state->width);
> }
> }
> input_mt_report_pointer_emulation(dev, true);
> @@ -187,6 +198,7 @@ static void focaltech_process_abs_packet(struct psmouse *psmouse,
>
> state->fingers[finger].x = ((packet[1] & 0xf) << 8) | packet[2];
> state->fingers[finger].y = (packet[3] << 8) | packet[4];
> + state->width = packet[5] >> 4;
> state->fingers[finger].valid = true;
> }
>
> @@ -331,6 +343,7 @@ static void focaltech_set_input_params(struct psmouse *psmouse)
> __set_bit(EV_ABS, dev->evbit);
> input_set_abs_params(dev, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
> input_set_abs_params(dev, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
> + input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
> input_mt_init_slots(dev, 5, INPUT_MT_POINTER);
> __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
> }
> --
> 1.9.1
>

--
Dmitry