OLED Display -- Framebuffer driver to DRM driver conversion required???

Hi,

In my project (Arm processor based), we are using 2 displays. Primary
display is for
Ubuntu 16.04 OS Gui display and secondary display is for status
messages, some small OLED display. This OLED display is framebuffer
driver based. My doubt is:

1. Whether I need to convert this framebuffer driver to DRM driver? Is
this required?
What is the advantages of this?

Please provide some inputs on this.

-Thanks.