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AMD Releases Cayman Documentation, Open Driver Is Close

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  • AMD Releases Cayman Documentation, Open Driver Is Close

    Phoronix: AMD Releases Cayman Documentation, Open Driver Is Close

    AMD has put out their first public documentation concerning their Radeon HD 6900 "Cayman" series graphics processors. This 492 page document describes the Cayman instruction set architecture. We have also received an update at Phoronix from AMD concerning the Radeon HD 6900 series open-source support under Linux...

    http://www.phoronix.com/vr.php?view=OTA4OA

  • #2
    And that is why you don't buy nVidia. Can't wait for my AMD Fusion-powered Lenovo ThinkPad X120e to ship shortly.

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    • #3
      Wow, props to AMD.

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      • #4
        March 05, 2009

        http://www.phoronix.com/scan.php?pag...0_legacy&num=1

        Originally posted by TheArticleAbove
        Will this move generate greater benefits within the open-source ATI stack? It does not appear AMD will be ramping up on their open-source efforts. In fact, just this week the RadeonHD driver took a serious blow as one of the three Novell developers that were responsible for its development was laid off. The remaining developers are also facing shorter work hours.
        *** VERSUS ***

        http://www.nvidia.com/object/linux-d...19-driver.html

        This is why you should buy:

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        • #5
          gtfo with nvidia.. they have crap chips.. heat heat heat heat.. no. no more heat.. better to take radeon, radeon have poor drivers.. but... no.. i cant take nvidia, sorry

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          • #6
            Let's all look at nvidia's open source efforts.....
            *tumbleweed*

            Right, now let's get back on topic discussing the awesome work of AMD releasing hardware specs (or, ISA specs as it may be).

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            • #7
              Isn't Cayman just Barts with more shaders? They're both 6xxx series, Northern Islands. The driver support shouldn't be that hard unless I'm missing something.

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              • #8
                Originally posted by Game_boy View Post
                Isn't Cayman just Barts with more shaders? They're both 6xxx series, Northern Islands. The driver support shouldn't be that hard unless I'm missing something.
                The 69xx Cayman is a big change from 68xx and before. It was a shader redesign IIRC.

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                • #9
                  Originally posted by Game_boy View Post
                  Isn't Cayman just Barts with more shaders? They're both 6xxx series, Northern Islands. The driver support shouldn't be that hard unless I'm missing something.
                  Nope. The architecture behind is kinda different. Shader processors are 4-way (cayman) instead of 5-way (barts), and they are also organized differently.

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                  • #10
                    Originally posted by mirv View Post
                    Let's all look at nvidia's open source efforts.....
                    *tumbleweed*
                    From my perspective it's not entirely that black and white.

                    Granted, in the last two decades I've never owned any Nvidia GPU exactly because they refuse to support open source drivers. But this doesn't mean that Nvidia wouldn't support open source in other areas.

                    Why is it that using ATI/AMD cards and Linux I have to use Nvidia's texture tools to compress S3TC textures? Because these texture tools are MIT-licensed open source, while ATI/AMD's ATI_Compress library and Compressonator are closed source, and worse, they're Windows only.

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                    • #11
                      Originally posted by blackshard View Post
                      Nope. The architecture behind is kinda different. Shader processors are 4-way (cayman) instead of 5-way (barts), and they are also organized differently.
                      5D way means 1big+4smal shaders is better

                      cayman is 4 big and no smal shaders and the big one are the same as the big one in r800green

                      the cayman is much easyer to programm with because they don't need to handle with the smal shaders all shaders have the same feature set in the group.

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                      • #12
                        Originally posted by nikai View Post
                        Why is it that using ATI/AMD cards and Linux I have to use Nvidia's texture tools to compress S3TC textures? Because these texture tools are MIT-licensed open source, while ATI/AMD's ATI_Compress library and Compressonator are closed source, and worse, they're Windows only.
                        this s3tc patented stuff hurt opensource much more they ever can to for OS with this tool and the MIT license-

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                        • #13
                          Hehe. I know why I stick with AMD-ATI.

                          I know it is not perfect and there are some open building sites, and yes, a few features are missing still but these are often the patent/DMCA issues.
                          And with AMD & intel (minus ImgTec) we have a situation in the GPU area that has never been so good before on the Linux/BSD side.

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                          • #14
                            edit took longer than 1 minute to write, goddamn, Michael fix it plz
                            And yes, 8 years ago I would have used nvidia. But things change, and sometimes they change for the better. My old nvidia cards are loooooong "legacy" not supported by anyting corretly and nouveau just starts to get into the shoes. (Kotau to the nouveau devs but I have these old geforces for so many years now and they still would not really work. So I am glad to have ATI GPUs to my AMD CPUs (that I nearly always had).)

                            Still I would welcome any other GPU vendors (nv, via/s3, ImgTec,...) if they would open up.

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                            • #15
                              I'm glad to see ATI's open-source support is getting stronger. However, on my Intel+ATI thinkpad, I still prefer to disable ATI HD3400, as its power management still cannot silent my fan even I didn't do nothing. Anyway, I like gallium3d. After r600g is enabled by default in mesa 7.xx, I will definitely switch back to ATI.

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