Re: [Linux-fbdev-devel] [PATCH 1/3] radeonfb: Fix 64 bits resources on 32 bits archs

From: Michel D=E4nzer <redacted>
Date: Wed, 23 Apr 2008 11:32:07 +0200

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

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

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I wanted to ask if there are any known workarounds atm that would=

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allow me to use my X11 for now?

=

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

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You can normally map the fb mapping /dev/fb and then map the regist=

ers

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using /dev/fb at an offset beyond the framebuffer (fix->smem_len).
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If X is using /dev/mem instead, then it's being stupid and needs to=

 be

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fixed...

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It's up to the driver, and again, the current radeon driver doesn't u=

se

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 :-)