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AMD's RS880 / 785G Gains Open-Source Acceleration

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  • AMD's RS880 / 785G Gains Open-Source Acceleration

    Phoronix: AMD's RS880 / 785G Gains Open-Source Acceleration

    Back in March we shared that the open-source ATI driver had gained support for the unreleased ATI RS880 IGP. Well, the RS880 ended up being turned into the 785G due to some problems on AMD's side, but today this new, much more powerful IGP has launched...

    http://www.phoronix.com/vr.php?view=NzQyOQ

  • #2
    Alex has also submitted a drm patch to the dri-devel mailing list. I suspect that this patch will also be required for rs880/785G support :

    http://marc.info/?l=dri-devel&m=124939979703242&w=2

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    • #3
      hell yeah!
      launch day oss support

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      • #4
        Amazing how much work that is being commited these days.

        In just 2 weeks, have we got KMS and Compiz for R600+R700, and 2D for an unreleased IGP.

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        • #5
          wait, in the article claim this acceleration is in xf86-video-ati for 780G ?

          isn't this suppoesd to be in radeonhd ?

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          • #6
            Reading the many reviews at AMDzone.com

            http://www.amdzone.com/index.php/new...oards-pictured

            http://www.amdzone.com/index.php/new...hipset-reviews

            I tend to wonder, why the South bridge isn't integrated in the North bridge? Wouldn't that be cheaper?

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            • #7
              Originally posted by b4283 View Post
              wait, in the article claim this acceleration is in xf86-video-ati for 780G ?

              isn't this suppoesd to be in radeonhd ?
              Now, what makes you say that? They both are supposed to support all the newest (radeon) cards.

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              • #8
                Originally posted by nanonyme View Post
                Now, what makes you say that? They both are supposed to support all the newest (radeon) cards.
                yeah, i know that. but sometimes i'm confused by articles that convince me -ati has better support than -radeonhd.

                i've used both on my 780G, but didn't find any differences though. (maybe in the Xv accelerations?)

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                • #9
                  We weren't sure when the 785G was going to launch. I noticed the announcement this morning so Alex pushed out what he had ready, which was radeon. The radeonhd driver should need pretty much the same changes.

                  Louise, as I understand it if you put a typical wide-bus Northbridge and Southbridge in the same package the pin count gets too high to be practical. There are very few connections between NB and SB, so you don't save much in pins by combining them.

                  There also used to be a requirement for different processes to handle the more analog-y functions on SB, not sure if that is still a factor.

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                  • #10
                    Originally posted by bridgman View Post
                    Louise, as I understand it if you put a typical wide-bus Northbridge and Southbridge in the same package the pin count gets too high to be practical. There are very few connections between NB and SB, so you don't save much in pins by combining them.

                    There also used to be a requirement for different processes to handle the more analog-y functions on SB, not sure if that is still a factor.
                    I had no idea that the pin count also were an issue for chipsets...

                    Let's hope that "16 cores is enough for anyone" That's at least what I have read is the max possible CPU cores.

                    Maybe we will see pins sticking out of the sides that goes directly into the ram modules? 4 sides => 4 memory banks.

                    I read that using optics (lasers) instead of electrical pins are 15-20 years out in the future, as mirrors that are able to change state can only operate at MHz right now.

                    Using lasers inside a CPU would come sooner. The problem here was the size of the emitters, where they are measured in microns.

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                    • #11
                      Originally posted by bridgman
                      There also used to be a requirement for different processes to handle the more analog-y functions on SB, not sure if that is still a factor.
                      I'm nowhere near the level of designing full-custom chips (yet), but I'd bet that the higher voltages used in some older digital I/O standards (e.g. USB and LPC) are still a factor.

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                      • #12
                        Originally posted by b4283 View Post
                        i've used both on my 780G, but didn't find any differences though. (maybe in the Xv accelerations?)
                        With apparently someone porting HDMI audio to the ati driver, the biggest difference should be in r5xx modesetting afaik, everything else just pretty much the same. Then when we get kernel modesetting, there really should be no differences between the two drivers.

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                        • #13
                          Originally posted by nanonyme View Post
                          With apparently someone porting HDMI audio to the ati driver, the biggest difference should be in r5xx modesetting afaik, everything else just pretty much the same. Then when we get kernel modesetting, there really should be no differences between the two drivers.
                          i really hope that we could get kernel modesetting and 3d on RS780 sometime soon 'cause fglrx is crashing my Xorg and programs all the time.

                          With the compiz in action, has someone already tested the new 3d acclerations with any 3d games yet ?

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                          • #14
                            I'm getting a little tired of the way these mainboards with integrated gpu's are layed out.... Why the obsolete dsub-15 vga plug? Why not dual-dvi? If somebody wants to plug an obsolete monitor into it, ship it with a DVI-DSUB15 adapter!

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                            • #15
                              Originally posted by b4283 View Post
                              With the compiz in action, has someone already tested the new 3d acclerations with any 3d games yet ?
                              There's problems with some tests still, regressions and otherwise. Also there's the speed issue with buffer swapping. No point trying with games or normal-use with Compiz yet, it's just not yet ready for those. The bit of news was mostly that it can run Compiz, not that it can run Compiz with useful speeds...

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