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Date: Thu, 26 Mar 2020 15:58:45 +0800 From: Johnny Chuang <johnny.chuang.emc@...il.com> To: Dmitry Torokhov <dmitry.torokhov@...il.com>, Benjamin Tissoires <benjamin.tissoires@...hat.com>, Peter Hutterer <peter.hutterer@...-t.net>, linux-kernel@...r.kernel.org, linux-input@...r.kernel.org, Rob Schonberger <robsc@...gle.com>, Johnny Chuang <johnny.chuang@....com.tw> Cc: James Chen <james.chen@....com.tw>, Jennifer Tsai <jennifer.tsai@....com.tw>, Paul Liang <paul.liang@....com.tw>, Jeff Chuang <jeff.chuang@....com.tw> Subject: [PATCH] Input: elants_i2c - support palm detection From: Johnny Chuang <johnny.chuang@....com.tw> Elan define finger/palm detection on the least significant bit of byte 33. The default value is 1 for all firmwares, which report as MT_TOOL_FINGER. If firmware support palm detection, the bit will change to 0 and report as MT_TOOL_PALM when firmware detecting palm. Signed-off-by: Johnny Chuang <johnny.chuang@....com.tw> --- drivers/input/touchscreen/elants_i2c.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c index 14c577c..3b4d9eb3 100644 --- a/drivers/input/touchscreen/elants_i2c.c +++ b/drivers/input/touchscreen/elants_i2c.c @@ -73,6 +73,7 @@ #define FW_POS_STATE 1 #define FW_POS_TOTAL 2 #define FW_POS_XY 3 +#define FW_POS_TOOL_TYPE 33 #define FW_POS_CHECKSUM 34 #define FW_POS_WIDTH 35 #define FW_POS_PRESSURE 45 @@ -842,6 +843,7 @@ static void elants_i2c_mt_event(struct elants_data *ts, u8 *buf) { struct input_dev *input = ts->input; unsigned int n_fingers; + unsigned int tool_type; u16 finger_state; int i; @@ -852,6 +854,12 @@ static void elants_i2c_mt_event(struct elants_data *ts, u8 *buf) dev_dbg(&ts->client->dev, "n_fingers: %u, state: %04x\n", n_fingers, finger_state); + /* Note: all fingers have the same tool type */ + if (buf[FW_POS_TOOL_TYPE] & 0x01) + tool_type = MT_TOOL_FINGER; + else + tool_type = MT_TOOL_PALM; + for (i = 0; i < MAX_CONTACT_NUM && n_fingers; i++) { if (finger_state & 1) { unsigned int x, y, p, w; @@ -867,7 +875,7 @@ static void elants_i2c_mt_event(struct elants_data *ts, u8 *buf) i, x, y, p, w); input_mt_slot(input, i); - input_mt_report_slot_state(input, MT_TOOL_FINGER, true); + input_mt_report_slot_state(input, tool_type, true); input_event(input, EV_ABS, ABS_MT_POSITION_X, x); input_event(input, EV_ABS, ABS_MT_POSITION_Y, y); input_event(input, EV_ABS, ABS_MT_PRESSURE, p); @@ -1307,6 +1315,7 @@ static int elants_i2c_probe(struct i2c_client *client, input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, ts->y_max, 0, 0); input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0); + input_set_abs_params(ts->input, ABS_MT_TOOL_TYPE, 0, MT_TOOL_MAX, 0, 0); input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->x_res); input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->y_res); input_abs_set_res(ts->input, ABS_MT_TOUCH_MAJOR, 1); -- 2.7.4
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