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

On Thu, 2005-03-17 at 10:28 +1100, Benjamin Herrenschmidt wrote:

On Wed, 2005-03-16 at 16:00 -0500, Michel D채nzer wrote:

quoted

On Wed, 2005-03-16 at 21:51 +0200, Ville Syrj채l채 wrote:

quoted

One thing just popped to my head though. If in the future we are going to 
allow graphics cards to render to system memory, using the swapper will no 
longer work. I don't see any other solution that having the CPU perform 
the byte swapping.

Sane hardware should have a way to deal with this as well. Either way,
this is hardware specific, so it will probably have to be handled by the
hardware driver(s) somehow.

Of course, and radeonfb is what if not a hardware driver ?

Who said it was anything else? Is radeonfb gonna handle the offscreen
surfaces though? My point was that the hardware driver(s) should be
involved in the decision on what format/byte order/... should be used
for a surface, instead of just hardcoding fixed formats and having the
CPU do possibly unnecessary byte swapping.


-- 
Earthling Michel D채nzer      |     Debian (powerpc), X and DRI developer
Libre software enthusiast    |   http://svcs.affero.net/rm.php?r=daenzer