Translations:About RGB-Pi and Raspberry Pi4/4/en

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  • Legacy - up to Pi3, Raspberry used a custom video driver that communicated directly to the firmware (which only had a custom implementation of OpenGL ES) and had direct access to the framebuffer. This is now legacy and not fully supported in Pi4 anymore.
  • FKMS (Fake/Firmware KMS) - uses the custom Dispmanx API to communicate with the firmware. It was the default Pi4's driver for some time, and did not support the use of framebuffer changes via fbset, tvservice or vcgencmd commands.
  • KMS - the kernel communicates directly to the hardware registers bypassing the firmware. As of today, this is the standard industry video driver and the new default driver in all current and future Pi models.
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