08:23 <tmlind> ungeskriptet: no idea but i think it's the same mcspi device as on am335x, maybe check if there are beagle bone lcd info available? see https://e2e.ti.com/support/processors-group/processors/f/processors-forum/608048/linux-am3352-using-3-wire-9bit-mode-devices-in-mcspi

12:43 <ungeskriptet> tmlind: I don't really understand, do you mean I should check the device trees? So far I found omap3-gta04.dtsi, which also uses a panel with 9 bit per word. It uses all 4 wire though.

12:44 <ungeskriptet> I also tried changing the pins from mcspi to gpio mux mode and bitbanging the SPI protocol but no luck so far either

12:45 <ungeskriptet> omap3-gta04.dtsi also does bitbanging instead of using mcspi

16:25 <tmlind> ungeskriptet: i meant if 3-wire 9-bit spi mode works, it's worth searching if there might be some beaglebone lcd examples using 3-wire 9-bit it as the spi controller is the same

16:25 <tmlind> oh i did not know gta04 uses it yeah i guess then it should work the same