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Graphics: Vulkan 1.2.134, AMDGPU, Sway Wayland Compositor

Submitted by Roy Schestowitz on Saturday 7th of March 2020 02:12:38 PM Filed under
Graphics/Benchmarks
  • Vulkan 1.2.134 Released With Many Fixes/Clarifications, New Qualcomm Extension

    The lone new extension in this release is VK_QCOM_render_pass_transform. As implied by the vendor prefix, this new Vulkan extension was developed by Qualcomm. The VK_QCOM_render_pass_transform allows applications/games to enable driver support for render pass transform functionality. For display units that don't support native screen rotation, flipping between portrait and landscape modes is to be handled as a later Vulkan composition pass or the application can also render frames pre-rotated if supported in order to avoid that additional overhead. Having the application/engine pre-rotate is Qualcomm's ideal approach in this situation to avoid placing the burden on the presentation engine that will lead to power/performance implications, but either approach works for Qualcomm with Vulkan. With VK_QCOM_render_pass_transform, the driver is able to handle more of the burden for the pre-rotate method in order to achieve optimal power/performance in such situations.

  • AMDGPU Trusted Memory Zone Support Could Soon Be Enabled By Default

    Going back to last September has been work within Linux's AMDGPU kernel driver on enabling encrypted vRAM support with "Trusted Memory Zone" functionality. Now it's looking like a kernel release in the not too distant future could be enabled this support by default.

    The AMD Radeon Trusted Memory Zone functionality is about protecting the contents of select pages from being read by the CPU or other non-GPU clients and preventing writes from happening to TMZ-protected pages. With the Linux implementation, the Trusted Memory Zone support will allow a new "encrypted" flag from user-space via the GEM memory management interface for allocating memory that should be secured by the hardware. This isn't enabled by default presumably due to the added overhead involved and not being of much real use besides when needing to encrypt select bits of video memory.

  • Sway Wayland Compositor Seeing Adaptive-Sync/VRR Support

    The i3-inspired Sway Wayland compositor is seeing work carried out for it to support Adaptive-Sync / Variable Rate Refresh.

    While Adaptive-Sync is most often talked about with its dynamic refresh rate for helping gamers avoid tearing and stuttering, a Sway developer has been looking at implementing it for this Wayland compositor itself.

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