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Radeon DRM-Next Work: GPUVM Optimizations, Deep Color HDMI

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  • Radeon DRM-Next Work: GPUVM Optimizations, Deep Color HDMI

    Phoronix: Radeon DRM-Next Work: GPUVM Optimizations, Deep Color HDMI

    The next round of Radeon DRM driver improvements have been mailed in for landing in the Linux 3.16 kernel...

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

  • #2
    d the change is to fill VM page tables from the GART page table when applicable.
    Someone explain what this means?

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    • #3
      Originally posted by ua=42 View Post
      Someone explain what this means?
      GART (Graphics Address Remapping Table) is what gets used to handle moving things around between video memory and main system memory. I'm not 100% sure on this but I'm thinking this goes in-hand with the recent work to make Radeon's memory allocation more optimized. So you'd have main system memory --> GART as a middle man --> Video memory.

      Possible that Radeon wasn't taking advantage of all available video memory? Or was taking advantage of it but only in specific and restricted cases?

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      • #4
        Originally posted by ua=42 View Post
        Someone explain what this means?
        It means we copy the PTEs from the gart table to the GPUVM tables if they are the same rather than populating them directly.

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        • #5
          Support of audio over DisplayPort?

          Hi,

          I am using a Radeon 7750, and sound works with the OSS radeon over HDMI, and Catalyst over DP, but radeon + DP does not work. As I would like to use a newer Xorg (1.16), and Catalyst is problematic in a multiseat environment, any timeline for sound over DP with radeon?

          Kind regards, Stefan

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          • #6
            Originally posted by StefanBruens View Post
            Hi,

            I am using a Radeon 7750, and sound works with the OSS radeon over HDMI, and Catalyst over DP, but radeon + DP does not work. As I would like to use a newer Xorg (1.16), and Catalyst is problematic in a multiseat environment, any timeline for sound over DP with radeon?

            Kind regards, Stefan
            I didn't think that DP actually spec'd audio.
            Is that an actual DP device you are running? Or are you running an HDMI device from the DP via passive adapter?

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            • #7
              Originally posted by droidhacker View Post
              I didn't think that DP actually spec'd audio.
              Is that an actual DP device you are running? Or are you running an HDMI device from the DP via passive adapter?
              https://en.wikipedia.org/wiki/Displayport

              It is speced for 24 bit 8 channel audio.

              I know at least the Intel DRM driver supports it. Not sure about the others. They show up as HDMI Audio under Pulseaudio, though.

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              • #8
                The hw supports audio over DP. Much or the audio hardware is shared between HMDI and DP. I haven't looked at what is required to get it working.

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                • #9
                  So where is the latest code?

                  git://people.freedesktop.org/~deathsimple/linux or git://people.freedesktop.org/~agd5f/linux ?

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                  • #10
                    Originally posted by sobkas View Post
                    So where is the latest code?
                    my tree for 3.16:
                    git://people.freedesktop.org/~agd5f/linux

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