> > > But a better look has me wondering how all these gpus are syncing > > > the framebuffer for direct access via cfb_imageblit and friends. I only > > > see > > > nouveau and intel gma even trying. > > > > Probably no other DRM driver uses hardware acceleration for fbcon. > > Yup. We've had patches for i915, resulted in half of mesa+glamour in-kernel, > which > is just pointless. > -Daniel
When I did the gma500 driver I played with it a little and the only thing that made any difference was scrolling acceleratin - which actually the i915 can probably also do without using the 2D/3D engine. It's actually trying to fix the wrong problem. The real problem is that the fbcon layer when running pure text output tries to write everything to the screen rather than just updating the offscreen array of text and then doing at most one difference update per vblank based upon the state of the display. That would make most of the dumb fbs feel lightning fast. Alan
