-------- Original-Nachricht --------

Datum: Wed, 18 Apr 2012 17:01:20 +0200
Von: "Michel Dänzer" [off-list ref]
An: Andreas Schwab [off-list ref]
CC: o jordan <redacted>, linuxppc-dev@lists.ozlabs.org
Betreff: Re: PowerPC radeon KMS - is it possible?

On Mit, 2012-04-18 at 16:55 +0200, Andreas Schwab wrote: 

quoted

Michel Dänzer [off-list ref] writes:

quoted

On Mit, 2012-04-18 at 16:28 +0200, Andreas Schwab wrote: 

quoted

Michel Dänzer [off-list ref] writes:

quoted

Have you tried smaller aperture sizes (uninorth_agp.aperture)
and/or radeon.test=1? (See commit
52f072cb084bbb460d3a4ae09f0b6efc3e7e8a8c)

Neither changes anything.

How small aperture sizes have you tried?

32M. With the old UMS driver 3D once worked fine ...

That doesn't necessarily mean much per se, as with UMS memory is only
statically mapped into the AGP GART once (so most of those 32M are
wasted at least most of the time), whereas with KMS it's dynamically
(un)mapped on demand.

That may be a stupid question, but is it allowed (for a DRM client or
whatever does the mapping) to change the content of a page mapped into
the AGP GART or is it necessary to explicitly unmap the page, change its
content and map it again?
I would say it's necessary to unmap the page first (sounds more like
the pci_[un]map_page() approach) - at least when it should work with
non-coherent architectures, too.

Gerhard

PS: Sorry for hijacking the thread. :-)
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