Good day!
I also try to use SPI for Ra8875. But my experience is too small.
Chibios on STM32F103 MapleMini board.
I can not find a ready driver, only template drivers/gdisp/RA8875/board_RA8875_template.h or FSMC paralel mode boards/base/Marlin/board_RA8875.h
Create from a template, is this the only solution?