lv_binding_micropython/driver/generic/st77xx.py in a recent commit
Now uses a buffer area created with lv.disp_create(width, height).
I got an error when flashing the screen, so I saw it with the help command.
self.rp2_wait_dma() # wait if not yet done and DMA is being used
# blit in background
It worked when I changed to
With the rp2 firmware built with lv_micropython commit 43ac037, advanced_demo worked after fixing the draw_buf.buf_act.dereference variable for buffer reading.
With the latest lv_micropython commit 70c5d61, which I fetched/merged again today, draw_buf* is no longer visible and advanced_demo no longer works.
When I started lv_micropython on Raspberry Pi Pico, I created and used the ili9341 version derived from the st77xx.py generic driver.
This st77xx.py was very helpful when I started with the rp2 port. I hope it will be fixed and working in the future.