pixcir driver : filter 2 pixels change in report

diff --git a/drivers/input/touchscreen/pixcir_i2c_ts.c b/drivers/input/touchscreen/pixcir_i2c_ts.c
index 57b83fd99f02c747f7f900142d315da74a29cadd..39faff42b3746d0523e90dcaa6d318a9717b1b0a 100644 (file)
--- a/drivers/input/touchscreen/pixcir_i2c_ts.c
+++ b/drivers/input/touchscreen/pixcir_i2c_ts.c
@@ -70,13 +70,14 @@ struct point_data{
        unsigned char   id;    //finger ID
        int     posx;
        int     posy;
+       int     lastx;
+       int     lasty;
        unsigned char active;
        unsigned char pre_active;
 };
 
 static struct point_data point[MAX_SUPPORT_POINT];
 
-
 struct i2c_dev
 {
        struct list_head list;
@@ -272,12 +273,17 @@ static void pixcir_ts_poscheck(struct pixcir_i2c_ts_data *data)
                        input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, false);
                }
 
-               if (point[i].active) {
+               if (point[i].active && (
+                       abs(point[i].posx - point[i].lastx) > 2 ||
+                       abs(point[i].posy - point[i].lasty) > 2
+                       )) {
                        input_mt_slot(tsdata->input, point[i].id);
                        input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, true);
                        input_report_abs(tsdata->input, ABS_MT_TOUCH_MAJOR, 1);
                        input_report_abs(tsdata->input, ABS_MT_POSITION_X, point[i].posy);
                        input_report_abs(tsdata->input, ABS_MT_POSITION_Y, point[i].posx);
+                       point[i].lastx = point[i].posx;
+                       point[i].lasty = point[i].posy;
                }
 
                DBG("%d[id = %d] = %2d active= %d pre_active = %d x = %5d y = %5d \n",