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Graphics: Qualcomm, AMD, and More

Submitted by Roy Schestowitz on Thursday 15th of July 2021 11:26:20 PM Filed under
Graphics/Benchmarks
  • Display Stream Compression Prepped For Qualcomm's MSM DRM Driver - Phoronix

    Patches have been posted for wiring up Display Stream Compression (DSC) support for the Qualcomm MSM Direct Rendering Manager driver.

    The VESA-backed Display Stream Compression standard for offering visually lossless, low-latency compression between the host and display panels via DP/eDP/DSI/HDMI interfaces may finally see support within the Qualcomm MSM DRM kernel driver. Qualcomm SoCs support DSC within its DPU hardware block but the mainline kernel driver hasn't yet had the necessary software pieces in place for this display bandwidth savings.

  • AMD's Modern Graphics Driver In Linux 5.14 Exceeds 3.3 Million Lines Of Code

    It was just four years ago the AMDGPU kernel driver was nearly one million lines of code and earlier this year began nearing three million lines. Now with Linux 5.14-rc1 released this week it is at over 3.3 million lines for this kernel graphics driver.

    Curiosity got the best of me with the ballooning size of AMDGPU so when running cloc on the "drivers/gpu/drm/amd" off Linux 5.14-rc1, it's now measuring in at 3.32 million lines of code. AMDGPU continues to by far be the largest driver within the mainline Linux kernel. That 3.3 million lines is made up of 2.86 million lines of "code", 332k lines of comments, and some 127k blank lines across 1,715 files.

    Of course, as longtime Phoronix readers will know, much of the ballooning size of AMDGPU is due to automated register header files that are added to the tree with each new GPU being supported. Those automatically generated header files based on AMD's internal documentation lead to the explosive growth and is sort of AMD's form of public documentation these days. Thankfully unused portions of these header files are eliminated by the compiler at build time. As measured by cloc, within the gpu/drm/amd code there is some 2.4 million lines of header files and then 427k lines of code detected C code.

  • Ricardo Garcia: Linking deqp-vk much faster thanks to lld

    Some days ago my Igalia colleague Adrián Pérez pointed us to mold, a new drop-in replacement for existing Unix linkers created by the original author of LLVM lld. While mold is pretty new and does not aim to be 100% compatible with GNU ld, GNU gold or LLVM lld (at least as of the time I’m writing this), I noticed the benchmark table in its README file also painted a pretty picture about the performance of lld, if inferior to that of mold.

    In my job at Igalia I work most of the time on VK-GL-CTS, Vulkan and OpenGL’s Conformance Test Suite, which contains thousands of tests for OpenGL and Vulkan. These tests are provided by different executable files and the Vulkan tests on which I’m focused are contained in a binary called deqp-vk. When built with debug information, deqp-vk can be quite large. A recent build, for example, is taking 369 MB in my drive. But the worst part is that linking the binary typically takes around 25 seconds on my work laptop.

  • AMD releases FidelityFX Super Resolution source code

    As promised when AMD revealed their answer to NVIDIA's DLSS, FidelityFX Super Resolution (FSR) is now officially open source and available under the MIT license.

    What actually is it? AMD say "FSR uses super-optimized spatial upscaling technologies to help boost your framerates and deliver high-quality, high-resolution gaming experiences, without having to upgrade to a new graphics card.". It works on both AMD and NVIDIA GPUs too, so it's not locked to a vendor. The idea is to give "practical performance" for more costly rendering operations like Ray Tracing.

  • AMD Posts FidelityFX Super Resolution Source Code

    After AMD posted FidelityFX Super Resolution last month with various initial launch titles, the source code to this NVIDIA DLSS alternative is now publicly available.

»

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