On 11/21/06, Roland Scheidegger <[EMAIL PROTECTED]> wrote: > Phillip Ezolt wrote: > > Roland, > > > > On 11/21/06, *Roland Scheidegger* <[EMAIL PROTECTED] > > <mailto:[EMAIL PROTECTED]>> wrote: > > > > Phillip Ezolt wrote: > >> It does get recognized as PCI. However, I had to force it PCIE. > >> (using Option "BusType" "PCIE"). These cards are > >> definately PCIE, so the original detection was wrong. > >> > >> I wonder if the MC_AGP_LOCATION register means something different > >> on the 200M. These cards have an extra PCIE component which is > >> supposed to shuffle graphics stuff to and from the memory. (This > >> is in addition to the normal channels to and from the graphics > >> card..) > > I'd be surprised if it's really different. I'd suspect that addresses > > within the AGP space just go untranslated to the bus without address > > translation as they did with other chips (with the chipset being > > responsible for translation). In any case, setting this up without > > RADEON_AGP_BASE likely makes little sense. I'm not sure why fglrx > > configures a 128MB window there. Maybe the chipset actually does some > > kind of agp gart remapping when set up correctly. > > > > > > Hmm. Maybe I just stumbled upon something good by accident. Like I > > said in the original email, there are still problems (garbage on the > > top half of the screen, and the hang). > It's a bit weird. Maybe this is how the uma+sideport setting works. > > > Should I read the value of "RADEON_AGP_BASE" when I have the working > > 8.24.8 driver and try to set that as well in the DRM module? > You can't just change that in the drm I think. > > > "This PCI Express auxiliary memory channel is effectively a 64-bit > > memory channel with access to system memory. This means that a VPU > > equipped with a 64-bit local graphics memory bus and a PCI Express > > auxiliary memory channel has an effective 128-bit memory bus." > > > > So, it looks as if there is at least two channels out of the card > > when it has hypermemory. > I think this is really only true for the xpress200 igps with local ram > in interleaved mode. I've never seen anything indicating that the > "normal" chips are actually able to split data like that - though > careful placing of some buffers in system ram and some other buffers in > local ram might indeed increase available bandwidth a bit slightly. But > there isn't really any additional "memory channel" involved in this > case, it's just the ability of the gpu's memory controller to read from > system ram directly, which it has had since ages... > > > (Gee, ATI, specs would be nice..) > > > > You don't have a xpress200 with local ram (sideport), right? I think > > something strange is going on with that agp location stuff. > > > > > > My laptop has 128M of sideport memory, and I have the BIOS configured > > so there is 128M of sideport + 128M of UMA memory. (for a total of > > 256M). > Ah! Is that interleaved or not? This setup is likely more complicated to > configure correctly than just using sideport (or uma) alone. I could be > wrong though, with some luck the chip / bios handles this fully > transparent on its own. > > > Interestingly, the fgrlx v8.24.8 driver (the one that works...), only > > detects 128M of memory. > > > > The fglrx v8.28.8 driver (which DOESN'T work... It hangs shortly > > after start up), detects 256M of memory, and has a different value > > for the MC_AGP_LOCATION. > > > > So, I'm guessing, that the v8.24.8 driver is probably exclusively > > using either the UMA or Sideport memory (and working correctly..). I > > don't know which (and I don't know how to figure it out... ;-) ) > This sounds like a very reasonable assumption. I think you should play > around with the bios settings and see what happens. >
FWIW, I've heard reports of some XPRESS users having success with fglrx only after messing with the bios. Alex > Roland > > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
