Hi Vitaly,

Yes, we made a quirk for separate non-multitouch processing of the 
HID_DG_PEN application for Goodix gt7385p (I2C_DEVICE_ID_GOODIX_0113 == 
0x0113). It works well, BTN_TOOL_PEN and BTN_TOUCH events have right order.
I attach patches for kernel 5.4
Buttons support was very tricky, because the panel tries to imitate 
eraser usage with combination of tip's and eraser's bits off and on, 
seems that Windows driver needs this. In second patch we add 
state-machines for pen buttons to simulate right and middle click. It 
works also well with this panel/pen, but I'm not sure if it works with 
other devices.

Kind regards,
Dmitry Mastykin


On 4/14/21 6:35 PM, Vitaly Minko wrote:
> Hello Dmitry,
> 
> 
> I have faced with exactly the same problem. Have you managed to solve 
> the issue?
> 
> If yes, could you please share the patch?
> 
> Thanks in advance!
> 
> 
> Best regards,
> 
> Vitaly
>