I am pondering about interfacing with the iPad Mini 2 touch panel. It seems that no one has successfully done this and/or published anything about it, so I want to take a stab at it.
As far as I understand the device uses a custom touch screen controller IC, meaning I can't get a datasheet for it. Luckily someone at least made a schematic for the device and we can see that the controller seems to talk to the uC through SPI.
Given that I don't know the protocol for the IC would there be some way to find out the protocol by spamming the input and seeing what comes out of the output?