From: Michel Dänzer <redacted>
Date: Wed, 23 Apr 2008 11:32:07 +0200

On Wed, 2008-04-23 at 08:21 +1000, Benjamin Herrenschmidt wrote:

quoted

On Tue, 2008-04-22 at 17:55 +0200, Christian Ehrhardt wrote:

quoted

I wanted to ask if there are any known workarounds atm that would
allow me to use my X11 for now?

X is doing a mmap of /dev/mem instead of /dev/fb ?

You can normally map the fb mapping /dev/fb and then map the registers
using /dev/fb at an offset beyond the framebuffer (fix->smem_len).

If X is using /dev/mem instead, then it's being stupid and needs to be
fixed...

It's up to the driver, and again, the current radeon driver doesn't use
radeonfb at all anymore...

The only portable thing is for X to use the PCI sysfs mmap() stuff,
which current Xorg servers using libpciaccess do.

I know because I'm typing this from a sparc64 using a Radeon
with current Xorg :-)

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