FB model basic issues (WAS: radeon, apertures & memory mapping)

Wed Mar 16 15:27:56 PST 2005

On Wed, 2005-03-16 at 22:55 +0200, Ville Syrjälä wrote:
> On Wed, Mar 16, 2005 at 10:49:11AM +1100, Benjamin Herrenschmidt wrote:
> > In the meantime, can you tell me more about your arbitration scheme ?
> 
> There is a lock associated with the graphics card. The lock is always 
> taken before programming the hardware. Other things wanting access to the 
> hardware wait until the lock is released.

Ok, so it would be easy to have directFB use an external arbiter without
breaking existing clients ? It will need at least to use the vga arbiter
that I'm about to finish, that should allow at least to have X on one
card and directFB on another without conflict.

Ben.