echo 'module goodix + p' | sudo tee / sys / kernel / debug / dynamic_debug / control

dmesg | grep Goodix

echo 'module goodix -p' | sudo tee / sys / kernel / debug / dynamic_debug / control

--- linux-4.11 / drivers / input / touchscreen / goodix.c.orig 2017-04-11 05: 37: 00.000000000 +1000
+++ linux-4.11 / drivers / input / touchscreen / goodix.c 2017-05-07 21: 47: 07.548083688 +1000
@@ -76,6 +76,8 @@
#define MAX_CONTACTS_LOC 5
#define TRIGGER_LOC 6

+ # Define GOODIX_SOFTBUTTON1 KEY_LEFTMETA
+
static const unsigned long goodix_irq_flags [] = {
IRQ_TYPE_EDGE_RISING,
IRQ_TYPE_EDGE_FALLING,
@@ -223,7 +225,25 @@
return error;
}

- return touch_num;
+ / * On DEXP Z110 the `Window` softbutton generates the data as follows:
+ * [628.463386] Goodix-TS i2c-GDIX1001: 00: I2C data: 90 01 [0000; 0000; 0000] 00
+ * [632.626271] Goodix-TS i2c-GDIX1001: 00: I2C data: 80 00 [0000; 0000; 0000] 00
+ * [632.638825] Goodix-TS i2c-GDIX1001: 00: I2C data: 80 00 [0000; 0000; 0000] 00
+ * [632.651391] Goodix-TS i2c-GDIX1001: 00: I2C data: 80 00 [0000; 0000; 0000] 00
+ */
+ Dev_dbg (& ts->client->dev, "I2C data% 02x% 02x [% 04i;% 04i;% 04i]% 02x% 02x [% 04i;% 04i;% 04i]% 02x% 02x [% 04i;% 04i;% 04i]% 02x \ n ",
+ Data [0]
+ * (U8 *) & data [1 + GOODIX_CONTACT_SIZE * 0], * (u16 *) & data [2 + GOODIX_CONTACT_SIZE * 0]
+ * (U16 *) & data [4 + GOODIX_CONTACT_SIZE * 0], * (u16 *) & data [6 0 + GOODIX_CONTACT_SIZE *],
+ * (U8 *) & data [8 + GOODIX_CONTACT_SIZE * 0]
+ * (U8 *) & data [1 + GOODIX_CONTACT_SIZE * 1], * (u16 *) & data [2 + GOODIX_CONTACT_SIZE * 1]
+ * (U16 *) & data [4 + GOODIX_CONTACT_SIZE * 1], * (u16 *) & data [6 + GOODIX_CONTACT_SIZE * 1]
+ * (U8 *) & data [8 + GOODIX_CONTACT_SIZE * 1]
+ * (U8 *) & data [1 + GOODIX_CONTACT_SIZE * 2], * (u16 *) & data [2 + GOODIX_CONTACT_SIZE * 2]
+ * (U16 *) & data [4 + GOODIX_CONTACT_SIZE * 2], * (u16 *) & data [6 + GOODIX_CONTACT_SIZE * 2]
+ * (U8 *) & data [8 + GOODIX_CONTACT_SIZE * 2]);
+
+ Return 0x7f & data [0]; / * Touch_num excludes the softbutton event bits * /
}

static void goodix_ts_report_touch (struct goodix_ts_data * ts, u8 * coor_data)
@@ -249,6 +269,8 @@
input_report_abs (ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w);
}

+ Static bool softbutton_pressed;
+
/**
* Goodix_process_events - Process incoming events
*
@@ -259,14 +281,27 @@
*/
static void goodix_process_events (struct goodix_ts_data * ts)
{
- u8 point_data [1 + GOODIX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];
- int touch_num;
+ U8 point_data [1 + GOODIX_CONTACT_SIZE * GOODIX_MAX_CONTACTS] = {};
+ Int touch_num, inp;
int i;

- touch_num = goodix_ts_read_input_report (ts, point_data);
- if (touch_num< 0)
+ Inp = goodix_ts_read_input_report (ts, point_data);
+ If (inp< 0)
return;

+ If (inp & 0x10) {
+ Dev_dbg (& ts->client->dev, "softbutton down");
+ Input_report_key (ts->input_dev, GOODIX_SOFTBUTTON1, 1);
+ Softbutton_pressed = true;
+ }
+
+ If (inp == 0 && softbutton_pressed) {
+ Dev_dbg (& ts->client->dev, "softbutton up");
+ Softbutton_pressed = false;
+ Input_report_key (ts->input_dev, GOODIX_SOFTBUTTON1, 0);
+ }
+
+ Touch_num = inp & 0x0f;
for (i = 0; i<touch_num; i ++)
goodix_ts_report_touch (ts,
& Point_data [1 + GOODIX_CONTACT_SIZE * i]);
@@ -612,6 +647,9 @@
ts->input_dev->id.product = ts->id;
ts->input_dev->id.version = ts->version;

+ __Set_bit (EV_KEY, ts->input_dev->evbit);
+ __Set_bit (GOODIX_SOFTBUTTON1, ts->input_dev->keybit);
+
error = input_register_device (ts->input_dev);
if (error) {
dev_err (& ts->client->dev,