On May 15 2014 or thereabouts, Andrew Duggan wrote:
> The F11 data in the HID report contains four bits of data for w_x and the
> least significant bits
> of x. Currently only the first three bits are being used which is resulting
> in small jumps in
> the position data on the x axis and in the w_x data.
>
> Signed-off-by: Andrew Duggan <adug...@synaptics.com>
> ---
Good catch. I might have considered that 3:0 means 3 bits, not 4. I must
have been tired while writing it :)
Reviewed-by: Benjamin Tissoires <benjamin.tissoi...@redhat.com>
Cheers,
Benjamin
> drivers/hid/hid-rmi.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c
> index 7ebdc96..c529b03 100644
> --- a/drivers/hid/hid-rmi.c
> +++ b/drivers/hid/hid-rmi.c
> @@ -277,9 +277,9 @@ static void rmi_f11_process_touch(struct rmi_data *hdata,
> int slot,
> input_mt_report_slot_state(hdata->input, MT_TOOL_FINGER,
> finger_state == 0x01);
> if (finger_state == 0x01) {
> - x = (touch_data[0] << 4) | (touch_data[2] & 0x07);
> + x = (touch_data[0] << 4) | (touch_data[2] & 0x0F);
> y = (touch_data[1] << 4) | (touch_data[2] >> 4);
> - wx = touch_data[3] & 0x07;
> + wx = touch_data[3] & 0x0F;
> wy = touch_data[3] >> 4;
> wide = (wx > wy);
> major = max(wx, wy);
> --
> 1.9.1
>
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