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Kernel: New Kernel.org Page, Linux 5.3 Previews/Features, and AMD Graphics

Submitted by Roy Schestowitz on Wednesday 10th of July 2019 06:13:43 PM Filed under
Graphics/Benchmarks
Linux
  • Active kernel releases

    Many Linux distributions provide their own "longterm maintenance" kernels that may or may not be based on those maintained by kernel developers. These kernel releases are not hosted at kernel.org and kernel developers can provide no support for them.

    It is easy to tell if you are running a distribution kernel. Unless you downloaded, compiled and installed your own version of kernel from kernel.org, you are running a distribution kernel. To find out the version of your kernel, run uname -r:

  • Linux 5.3 Media Driver Updates Bring New Amlogic Meson Video Decoder

    After going through 9+ rounds of revisions for the Amlogic video decode driver, it's now been part of the media subsystem updates for the Linux 5.3 kernel.

    This Amlogic video decode driver supports the GXBB/GXL/GXM chipsets and allows currently MPEG-1/MPEG-2 decoding with future work to tackle MPEG-4, H.264, HEVC, and VP9.

  • Linux 5.3 Crypto Updates Jitter RNG, Adds xxHash

    Herbert Xu sent out the crypto subsystem updates on Monday for the in-development Linux 5.3 kernel.

    Linux 5.3 is bringing an updated Jitter RNG implementation based on the upstream Jitter 2.1.2 spec with various alterations. There is also now support for the SHA204A random number generator, 5-way interleave support for ECB/CBC/CTR for 64-bit ARM, and other fixes.

  • Raspberry Pi CPUFreq Driver & Other Power Management Work For Linux 5.3

    The power management changes for Linux 5.3 merge window don't offer any P-State changes or other prominent Intel changes this cycle but there is some other improvements as well as new CPUFreq drivers for CPU frequency scaling.

    Arguably the biggest Linux 5.3 power management change is the mainline addition of a CPUFreq driver for Raspberry Pi. This CPUFreq driver communicates with the firmware running on the dedicated processor responsible for clock adjustments. This firmware ends up making the final call on whether to honor requests for CPU clock changes based upon thermal and power criteria.

  • AMD Opens Up Its Contrast Adaptive Sharpening Under FidelityFX On GPUOpen

    Following the Radeon RX 5700 series launch, AMD has now open-sourced their Contrast Adaptive Sharpening (CAS) technology under FidelityFX on GPUOpen. 

    Contrast Adaptive Sharpening provides sharpening and optional scaling and is implemented as HLSL and GLSL shaders for Direct3D and Vulkan. CAS is designed to provide better sharpness with fewer artifacts and to increase the quality of temporal anti-aliasing. 

    The GLSL/Vulkan shaders for CAS are obviously relevant to Linux gamers though this initial FidelityFX release appears catered to a Windows workflow. FidelityFX 1.0 / CAS is licensed under the MIT license. 

  • AMDGPU & RadeonSI Linux Drivers See More Navi Optimizations + Fixes

    t's just not the RADV Vulkan driver seeing lots of Navi activity but the AMDGPU DRM kernel driver and RadeonSI OpenGL Mesa driver are also off to the races in improving their newly-enabled Navi / Radeon RX 5700 series support. 

    On the AMDGPU kernel side, AMD longtime Linux developer Alex Deucher sent out a new PR containing some additional fixes for Navi. This pull request is for the now-open Linux 5.3 merge window to polish up this initial GPU enablement for the kernel. 

    The Navi 10 work that's new for AMDGPU is GPU reset abilities in case of hangs, PowerPlay power management fixes, and graphics fixes. Outside of Navi specific work there is also XGMI fixes, HMM API changes, and other fixes. 

»

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