Hello all,

I'm using a notebook with Goodix gt7385p touchscreen controller in HID 
Protocol Device (I2C bus) mode.

hid-multitouch driver is servicing this device. I added this to be sure 
the quirks set:
	{ .driver_data = MT_CLS_WIN_8_DUAL,
		HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
			I2C_VENDOR_ID_GOODIX,
			I2C_DEVICE_ID_GOODIX_0113) },

The problem is that hovering works as touch, and UI menus and buttons 
are activated before I touch the panel with stylus. I attach evtest 
output of touching panel be stylus and removing stylus away.

Trying a wacom pen tablet, borrowed from my daughter, I see that they 
use such a sequence:
EV_KEY BTN_TOOL_PEN 1 - start hovering here
EV_KEY BTN_TOUCH 1 - start touching
EV_KEY BTN_TOUCH 0 - stop touching
EV_KEY BTN_TOOL_PEN 0 - stop hovering

Just to make the touchscreen working I tried to add BTN_TOUCH reports to 
hid-multitouch for my device. But as soon as I add 
input_set_capability(hi->input, EV_KEY, BTN_TOUCH), I see BTN_TOUCH 0 / 
BTN_TOUCH 1 pair in every report.

So 2 questions that I have:
1) is the sequence in evtest.txt correct?
2) who may report BTN_TOUCH 0/1 pairs when BTN_TOUCH capability is 
added? I tried to search with debug messages in hid-input.c and 
hid-multitouch.c but without success.

Thank you in advance!
Dmitry Mastykin

Here is the citation from dmesg:
----------------------------------------------------------------------
[    5.032956] i2c_hid i2c-GXTP7380:00: i2c-GXTP7380:00 supply vdd not 
found, using dummy regulator
[    5.032979] i2c_hid i2c-GXTP7380:00: i2c-GXTP7380:00 supply vddl not 
found, using dummy regulator                [    5.088245] input: 
GXTP7380:00 27C6:0113 Touchscreen as 
/devices/pci0000:00/0000:00:17.0/i2c_designware.4/i2c-9/i
2c-GXTP7380:00/0018:27C6:0113.0001/input/input14 
                                            [    5.109607] input: 
GXTP7380:00 27C6:0113 as 
/devices/pci0000:00/0000:00:17.0/i2c_designware.4/i2c-9/i2c-GXTP7380:
00/0018:27C6:0113.0001/input/input15 
                                            [    5.112486] input: 
GXTP7380:00 27C6:0113 as 
/devices/pci0000:00/0000:00:17.0/i2c_designware.4/i2c-9/i2c-GXTP7380:
00/0018:27C6:0113.0001/input/input16 
                                            [    5.112561] hid-generic 
0018:27C6:0113.0001: input,hidraw0: I2C HID v1.00 Device [GXTP7380:00 
27C6:0113] on i2c-G
XTP7380:00 
                                            [    6.417241] input: 
GXTP7380:00 27C6:0113 as 
/devices/pci0000:00/0000:00:17.0/i2c_designware.4/i2c-9/i2c-GXTP7380:
00/0018:27C6:0113.0001/input/input20 
                                            [    6.417833] input: 
GXTP7380:00 27C6:0113 Stylus as 
/devices/pci0000:00/0000:00:17.0/i2c_designware.4/i2c-9/i2c-GX
TP7380:00/0018:27C6:0113.0001/input/input21 
                                            [    6.417902] input: 
GXTP7380:00 27C6:0113 UNKNOWN as 
/devices/pci0000:00/0000:00:17.0/i2c_designware.4/i2c-9/i2c-G
XTP7380:00/0018:27C6:0113.0001/input/input22 
                                            [    6.417973] 
hid-multitouch 0018:27C6:0113.0001: input,hidraw0: I2C HID v1.00 Device 
[GXTP7380:00 27C6:0113] on i2
c-GXTP7380:00