Re: radeonfb, dedicate memory to something else

Michel Dänzer wrote:

On Tue, 2008-07-22 at 09:31 +0100, Matt Sealey wrote:

quoted

or other graphics drivers can be told "please only use the first 32MB" and
then either manually or automatically, map the rest as ramdisk.

You can limit the amount of video RAM used by X using the VideoRam
directive in xorg.conf(5).

Ah okay. So now.. how do we do this for framebuffers?

Is it safe to poke around in radeon_identify_vram and maybe supply a kernel
argument videomem=32M and let it check, if it's bigger, then limit it, and
if not, keep the old size in rinfo->video_ram?

Can/could this be moved to all relevant framebuffer drivers?

GART doesn't have anything to do with this. I suspect he was thinking of
the PCI BARs not covering all video RAM.

That's certainly not the case here.

-- 
Matt Sealey [off-list ref]
Genesi, Manager, Developer Relations