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Radeon PRIME Import/Export Support For Libdrm

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  • Radeon PRIME Import/Export Support For Libdrm

    Phoronix: Radeon PRIME Import/Export Support For Libdrm

    Support within the DRM user-space library for handling PRIME import and export of GEM buffer objects has been committed for the open-source Radeon Linux graphics driver...

    http://www.phoronix.com/vr.php?view=MTE1OTY

  • #2
    All this work is very exciting! What should be done to enable GPU-switching (with MUXless cards)? When it will be possible?

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    • #3
      I will be buying a notebook with enduro soon so I am a bit interested in that work but there is surprisingly little information "out there".

      As I understand it the whole GPU offloading and output slave will come with randr 1.5 but my xrandr --version says with xorg-git master:
      Code:
      xrandr program version       1.3.5
      Server reports RandR version 1.3
      So it's not even in Xorg yet?

      According to phoronix the prime/dmabuf stuff should be in linux 3.5. But is it ready? Is it ready in 3.6-rc1?

      Is there xf86-video-ati needed at all?

      And how long will it take until it is ready at least in git? I don't need to know it exactly, but days, weeks or months?

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      • #4
        GPU recovery

        Does PRIME support GPU crash/lock-up recovery?
        What if a device driver crash?

        Then the whole system crashes?

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        • #5
          What driver combo's will be possible with the PRIME technology?

          Intel(FOSS) + (NON-FOSS) ATi/NVidia
          Intel(FOSS) + (FOSS) ATi/NVidia

          I know there is no NON-FOSS optimus support, but is there any NON-FOSS ATi support for dual-card laptops, is it decent?

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          • #6
            I think the Linux Catalyst driver (aka fglrx) allows manual switching between GPUs, but requires that X be restarted for the switch to take effect.

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            • #7
              Originally posted by bridgman View Post
              I think the Linux Catalyst driver (aka fglrx) allows manual switching between GPUs, but requires that X be restarted for the switch to take effect.
              And that makes this feature useless

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              • #8
                Um... no, but I know you already knew that

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                • #9
                  Originally posted by bridgman View Post
                  Um... no, but I know you already knew that
                  My point is that something like that should not involve user interaction or even an automated restart. The user must have no idea -not even the slightest blink must disrupt his work- when the system goes from one card to another. OK maybe a notification but thats all.

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                  • #10
                    Ahh, you mean "makes Catalyst's switching useless". I thought you were talking about making radeon Prime useless.

                    At least I understand what you're saying now, even if I still don't agree with it

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