[directfb-dev] Re: [PATCH] G450/G550 detection for CRTC2

[Denis Oliver Kropp <dok@directfb.org>]

Quoting Ville Syrj?l? (syrjala@sci.fi):
> > > Unfortunately this doesn't help as much as I'd like. Flip() waits
> > > for the
> > > card to become idle before flipping
> > 
> > What do you mean "idle"?  Is there a good reason to wait for it to be
> > idle?
> 
> We wait for the drawing engine to finish whatever it was doing and also
> wait for the bfifo to drain. Most register writes and all framebuffer
> writes go through this fifo. If we don't wait the card may still be
> drawing to the new front buffer.

But in case of mplayer it's unnecessary, because mplayer is only
doing a memcpy to the buffer, no acceleration is used on it.
But I also think that it won't cause problems under normal circumstances.

-- 
Best regards,
  Denis Oliver Kropp

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