1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking Benchmarking Platform
Phoromatic Test Orchestration

Community Beats AMD To New Radeon Audio Code

AMD

Published on 04 December 2011 07:44 AM EST
Written by Michael Larabel in AMD
12 Comments

It was just yesterday that I was writing about AMD still not having any new HDMI audio support code available to the public for the Radeon HD 5000 series and newer. The hold-up on this HDMI audio code for the open-source Radeon driver has been due to the patches failing to clear AMD's legal review multiple times. Well, leave it up the community, and now this morning there's some Evergreen patches for this support.

AMD's internal Evergreen HDMI audio code has gone through four revisions so far, but it hasn't been officially signed off by the legal team. This process has drawn on for several months with no support for HDMI audio on the Radeon HD 5000/6000 series and newer GPUs when using anything but the Catalyst binary blob. The Evergreen family is now one and a half years old, but the HDMI audio support is finally available on this Sunday morning for the Radeon KMS driver.

It was yesterday that Rafał Miłecki, an independent open-source contributor, wrote in the Phoronix Forums: "Unfortunately I've bought netbook with AMD E-450, and so with integrated HD6320 :( Fortunately expect patches ~tomorrow :)" Guess what? He managed to get Evergreen HDMI audio working.

Rafał Miłecki is the open-source developer who has previously worked on the R700 KMS audio support and various other parts of the open-source Radeon Linux stack. He was also the one that hacked in 802.11n support into a Broadcom WiFi driver.

Hitting the DRI mailing list just minutes ago was "support for audio on Evergreen" (the Radeon HD 5000 series). The first patch was 35 lines of new code and introduces a few new registers while the second patch was just a few lines of code. Kudos to Rafał Miłecki for managing Radeon HD 5000 series HDMI audio code working (and finding out the bits to poke) prior to AMD getting out any code or further documentation.

HDMI audio has been supported already for previous generations of Radeon GPUs by the KMS/DRM driver. The original HDMI audio code also came via reverse-engineering back in the RadeonHD days.

The patches can be found here and will hopefully be part of the Linux 3.3 kernel.

Additional details on how you can help with reverse-engineering the Radeon HDMI audio registers for your graphics card can be found in this forum thread.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Articles & Reviews
  1. Sub-$20 802.11n USB WiFi Adapter That's Linux Friendly
  2. The Lenovo T450s Is Working Beautifully With Linux
  3. Linux 4.0 SSD EXT4 / Btrfs / XFS / F2FS Benchmarks
  4. Linux 4.0 Hard Drive Comparison With Six File-Systems
  5. Lenovo ThinkPad T450s Broadwell Preview
  6. How Open-Source Allowed Valve To Implement VULKAN Much Faster On The Source 2 Engine
Latest Linux News
  1. Intel's Turbostat Adds Skylake Support In Linux 4.1
  2. Microsoft's Open-Source Group Merges Back Into The Company
  3. EXT4 In Linux 4.1 Adds File-System Level Encryption
  4. Open-Source Ardour 4.0 Audio Software Has Big Improvements
  5. Linux-Powered Endless Computer Raises $100k+ In A Few Days
  6. GCC 5.1 RC2 Arrives, GCC 5.1 Planned For Next Week
  7. F2FS For Linux 4.1 Has New Features & Fixes
  8. Phoronix Server Upgrade This Weekend: Dual Haswell Xeons, 96GB DDR4
  9. Google's Experimental QUIC Transport Protocol Is Showing Promise
  10. Red Hat Joins Khronos, The Group Behind OpenGL & Vulkan
Most Viewed News This Week
  1. Nouveau: NVIDIA's New Hardware Is "VERY Open-Source Unfriendly"
  2. Linux 4.0 Kernel Released
  3. Linux 4.1 Brings Many Potentially Risky x86/ASM Changes
  4. Microsoft Announces An LLVM-Based Compiler For .NET
  5. VirtualBox 5.0 Beta 2 Released
  6. KDBUS Is Taking A Lot Of Heat, Might Be Delayed From Mainline Linux Kernel
  7. Mozilla Start Drafting Plans To Deprecate Insecure HTTP
  8. LibreOffice 4.5 Bumped To Become LibreOffice 5.0