With many Linux desktops now running Wayland quite nicely, it seems it's time to keep pushing ahead. AMD have revealed what they call the AMDGPU Composition Stack (ACS).

Unfortunately, the HDMI Forum refused to allow HDMI 2.1+ features in the open source driver, but that hasn't stopped one developer.

It's not complete HDMI 2.1 support but to much surprise hitting the mailing list today were official patches from AMD for implementing HDMI Fixed Rate Link 'FRL' support for their kernel graphics driv...

AMD sent out their latest Linux kernel graphics driver patches today for enabling some new hardware IP blocks. And as part of that, preparing for GDDR7 video memory with the AMDGPU driver...

Linux 7.4 is now set to reach the elusive milestone of HDMI 2.1 support for the AMDGPU kernel graphics driver. After the HDMI Forum previously rejected HDMI 2.1 for the AMDGPU open-source driver implementation going back years, earlier this year something changed -- widely speculated to be with Valve's involvement -- that HDMI 2.1 patches began appearing for the AMDGPU driver. With the upcoming Linux 7.4 cycle, the bulk of that work will now be in place and enabled by default...

At the beginning of the month was the surprise milestone of AMD posting AMDGPU kernel driver patches for HDMI 2.1 Fixed Rate Link (FRL) support. The HDMI FRL patches have since been updated to also enable HDMI 2.1's Display Stream Compression (DSC) functionality for higher resolutions and higher refresh rates with the open-source AMDGPU driver...

An unexpected surprise today are AMD Linux software engineers announcing a new project a bit further outside the scope of their open-source graphics drivers... The AMDGPU Composition Stack "ACS" is for delivering new advanced features atop Wayland for bettering the Linux desktop display capabilities...

AMDGPU full HDMI 2.1 implementation under way AMD's first public patch series adds HDMI FRL, while a full implementation is expected once the remaining

Linux 7.4 is going to be the big kernel release where the AMD graphics driver will finally expose HDMI 2.1 by default and comes with features including HDMI FreeSync, VRR, and ALLM. Ahead of that milestone there have been various other last minute tweaks and improvements to its HDMI 2.1 support. Sent out on Thursday was the latest round of AMDGPU DC patches that includes a few more patches for improving the HDMI 2.1 reliability...

Adventures in programming, hardware, DSP, and chiptune

While not as exciting as features like HDMI 2.1 FRL and Display Stream Compression itself, as part of AMD's efforts to provide a fully open-source HDMI 2.1 driver implementation for AMDGPU, new code is being prepped for their kernel driver to support the HDMI compliance testing efforts...

Following last week's main set of DRM kernel graphics driver feature updates for Linux 7.0, merged on Friday to Linux 7.0 Git was the first round of fixes to these Direct Rendering Manager drivers. Dominating most of the code changes in this latest pull were AMDGPU fixes, including more enhancements for aging Radeon graphics processors...

A nice Easter surprise are some last minute updates submitted to DRM-Next of the final planned AMDGPU/AMDKFD feature changes for the upcoming Linux 7.1 feature cycle...

A patch series posted last week for the open-source AMDGPU kernel driver implements HDMI Variable Rate Refresh "VRR" and other gaming features for HDMI displays. With the HDMI Forum blocking HDMI 2.1 open-source support, these HDMI gaming features for the AMDGPU driver were developed via trial-and-error and the limited public knowledge available. A second iteration of these patches are now available for testing...

AMD is ready with more AMDKFD compute driver and AMDGPU kernel graphics driver changes for the upcoming Linux 7.2 merge window...