I'm searching for a monochrome 160x160 display, which we want to use
with a PXA270. The onboard LCD controller supports DSTN and TFT. We have
an evaluation board with a working 800x600 LCD.

Do we need further drivers if we exchange the display? (If we need them,
I don't understand what's the task of the controller.)

Can you recommend displays that are compatible with the XScale (and for
that drivers are available, if needed)?