Hi,
Some comments below. If it is not a problem that width values are
outdated as soon as there are two or more fingers on the touchpad, I
think the change is good.
Regards,
Mathias
Am 24.04.2015 um 01:15 schrieb Dmitry Tunin:
> 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@xxxxxxxxx>
> ---
> drivers/input/mouse/focaltech.c | 16 ++++++++++++++--
> 1 file changed, 14 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/input/mouse/focaltech.c b/drivers/input/mouse/focaltech.c
> index 23d2594..ea53f8b 100644
> --- a/drivers/input/mouse/focaltech.c
> +++ b/drivers/input/mouse/focaltech.c
> @@ -90,6 +90,13 @@ struct focaltech_finger_state {
> */
> unsigned int x;
> unsigned int y;
> +
> + /*
> + * Finger width 0-7 and 15 for 'latching'
You already describe below that 15 is latched - what you write above
should probably rather be something like "15 if a very large contact
area was detected" or something like that.
> + * 15 value stays until the finger is released
> + * Width is reported only in absolute packets
> + */
> + unsigned int width;
> };
>
> /*
> @@ -112,7 +119,7 @@ struct focaltech_data {
> struct focaltech_hw_state state;
> };
>
> -static void focaltech_report_state(struct psmouse *psmouse)
> +static void focaltech_report_state(struct psmouse *psmouse, bool abs)
> {
> struct focaltech_data *priv = psmouse->private;
> struct focaltech_hw_state *state = &priv->state;
> @@ -137,6 +144,7 @@ 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);
> + if (abs) input_report_abs(dev, ABS_TOOL_WIDTH, state->width);
You are sending width here for *all* fingers, even though only one
finger has an up-to-date width value. Is that intentional? I fail to see
how that is different from always sending width no matter the packet
type, because in any case all but one fingers will have an outdated
width value.
> }
> }
> input_mt_report_pointer_emulation(dev, true);
> @@ -187,6 +195,7 @@ 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->fingers[finger].width = packet[5] >> 4;
> state->fingers[finger].valid = true;
> }
>
> @@ -228,14 +237,17 @@ static void focaltech_process_packet(struct psmouse *psmouse)
> switch (packet[0] & 0xf) {
> case FOC_TOUCH:
> focaltech_process_touch_packet(psmouse, packet);
> + focaltech_report_state(psmouse, false);
> break;
>
> case FOC_ABS:
> focaltech_process_abs_packet(psmouse, packet);
> + focaltech_report_state(psmouse, true);
> break;
>
> case FOC_REL:
> focaltech_process_rel_packet(psmouse, packet);
> + focaltech_report_state(psmouse, false);
> break;
>
> default:
> @@ -243,7 +255,6 @@ static void focaltech_process_packet(struct psmouse *psmouse)
> break;
> }
>
Remove that blank line as well? :)
> - focaltech_report_state(psmouse);
> }
>
> static psmouse_ret_t focaltech_process_byte(struct psmouse *psmouse)
> @@ -331,6 +342,7 @@ 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);
> }
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