Is it possible to video output through the Raspberry Pi's VideoCore?

[Mimizusan3373]

thank you for the amazing RTOS!

Is it possible to use Zephyr to video output through the Raspberry Pi's VideoCore? I tried building the ./sample/display for the rpi_4b board, but it failed.

[ghost]

This would allow many cool projects, but I see no mention of this anywhere. What would it take to implement?

E: this might be helpful, https://github.com/bztsrc/raspi3-tutorial/tree/master/09_framebuffer

https://github.com/Random06457/rpi4-gpu-bare-metal-examples

[moc67331]

I’ve implemented a display device driver for the BCM2711 (Raspberry Pi 4B) and managed to render some colors. However, the output is clearly incorrect. 😅

Is there anyone interested in working on this implementation? I plan to continue working on it in my free time, but it may take a while because I’m still not very familiar with Zephyr. (Maybe it just requires the [https://github.com/bztsrc/raspi3-tutorial/tree/master/09_framebuffer] that gergovari in the previous reply and adding DTS configuration and adding an MMU configuration via device_map().)

[moc67331]

a small LVGL demo worked in qemu for raspberry pi 4b, but it’s not perfect.

rpi4blvgl.mp4