How to Invert the touchscreen Lenovo Yoga xinput?

Running axis if that matters.

I just flipped my Lenovo Yoga upside down to put the screen at a better viewing angle. Initially the display was upside down, that was easy to correct with Settings | Display | Invert.  So display is now correct

However the touch aspects is still inverted, (touching lower left, shows touch at upper right). How do I go about inverting the touch aspect?

Thanks in advance and much appreciated.
 

Thanks for the links, closer but not solved yet....

After more searching/reading it looks like the utility xinput might give me some insight as to what touchscreen driver is actually being used and then I can probably tweak the calibration.I installed xinput and get the following when I run it. 


Looks like SYNAPTICS Touch digitizer is the driver for the touch aspect on the touchscreen. I looked in /usr/share/X11, and there are 5 .conf files:
40-libinput.conf
10-radeon.conf
70-waycom.conf
10-amdgpu.conf
10-quirks.conf

None of these have a line for XAxisMapping or YAxisMapping, if they did I could  probably just change 1230 to 0123.

So I ran xinput_calibrator and touched the screen etc. and it detects the touches generates a snippet with the calibration data that I'm supposed to put in a file named 99-calibration.conf and place that file in /usr/share/x11/xorg.conf.d/ 
 
So I did that, rebooted and no change, so it looks like 99-calibration.conf is either being ignored or is in the wrong location?Any insight would be helpful.