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V3DV Driver For Raspberry Pi Closing In On Vulkan 1.0

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  • V3DV Driver For Raspberry Pi Closing In On Vulkan 1.0

    Phoronix: V3DV Driver For Raspberry Pi Closing In On Vulkan 1.0

    The V3DV open-source Vulkan driver being developed by consulting firm Igalia for the Raspberry Pi Foundation is nearing official support for Vulkan 1.0...

    http://www.phoronix.com/scan.php?pag...rryPi-1.0-Near

  • #2
    Nice! Imho the Pi getting Vulkan support is an important step in overall Vulkan adoption.

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    • #3
      It'll be interesting to see OpenGL ES vs Vulkan performance on the Pi. If there's any place where the performance gains of Vulkan are needed, it's something like the Raspberry Pi.

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      • #4
        so I understood correctly that an independent open source developer wrote an Vulkan driver for older Raspberry Pies https://hackaday.com/2020/06/22/vulkan-for-the-pi-3/ while the company behind it rather invested in another commercial developer?

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        • #5
          The GPU is a weak point for Pi4, and it might remain unchanged in a Pi5. So it's important to squeeze out all of the performance.

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          • #6
            This is thrilling, playing Dolphin with less virtual-underclock would be sweet, and giving performance margin for PPSSPP to apply graphical improvements.

            I wonder if Pi4 hardware could support the latest Vulkan 1.2, or at least most of its extensions.

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            • #7
              Originally posted by AJenbo View Post
              Nice! Imho the Pi getting Vulkan support is an important step in overall Vulkan adoption.
              It also makes the RPi4 much more potent as a platform itself, the shader units of the GPU can be a pretty powerful tool for other stuff than graphics under the right circumstances, and with Vulkan there's a lot less bottlenecks than with OpenGL ES.

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              • #8
                Originally posted by Chris256 View Post

                It also makes the RPi4 much more potent as a platform itself, the shader units of the GPU can be a pretty powerful tool for other stuff than graphics under the right circumstances, and with Vulkan there's a lot less bottlenecks than with OpenGL ES.
                This, bottlenecks.

                I build a standalone VR headset (very much WIP) with a RPI2, GL2 renders 2x FBO @ 600x600px for each eye @ 60Hz (Waveshare 7" display) with a simple photogrammetry scanned scene (20k poly, 1x 2048x2048 texture). Framerate maxes out near display frequency (unfortunately with some tearing, GL driver issue it seems). Works surprisingly well, latency is great. Does barrel distortion (in vertex shader), but diffraction in PS is to heavy to meet 60fps. Some extra room to spare, e.g. for more detailed geometry, or lower thermals/longer battery duration would be sweet. I used the MPU9250 for IMU via GPIO. Oh yeah I forgot to mention the €7 battery with integrated solar panel.

                Vulkan would probably help a bunch to render the two FBOs more in parallel, dropping some overhead. Ultimately I'd like to upgrade the display to the Waveshare 5.5" @ 1920x1080, so 2x 1080 FBO @ 60Hz would be required for that. Don't think I can meet that with just GLES2, except perhaps with RPI4 (once the drivers are sorted out that is), but RPI4 thermals are bad for something strapped to your forehead.
                Last edited by Remdul; 09-08-2020, 04:08 PM.

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