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.org

Radeon DRM Finally Has HD 6000 Series HDMI Audio

AMD

Published on 18 June 2012 09:35 PM EDT
Written by Michael Larabel in AMD
23 Comments

The open-source Radeon DRM/KMS driver in the mainline kernel beginning with the Linux 3.5 release will finally provide support for HDMI audio on the Radeon HD 6000 "Northern Islands" graphics cards.

Queued up as a fix in the Linux 3.5 kernel, which Linus Torvalds pulled this weekend via the latest drm-fixes, is an "enable HDMI on DCE5" commit. It's this commit that enables HDMI audio support when using the open-source AMD Linux driver for the HD 6000 series. The exception though is that this HDMI audio support doesn't cover the Radeon HD 6900 series at this point.

This HDMI audio enablement support was allowed past the Linux 3.5 merge window since the commit basically comes down to letting the Northern Islands GPUs use the same Evergreen HDMI audio code-paths. It turns out that the HDMI engine is quite similar between the HD 5000 and HD 6000 (Northern Islands) graphics processors.

While the HDMI audio code is in the driver, it's still not enabled by default for fear of bugs. Rafał Miłecki, the community developer that's done a lot of the HDMI audio reverse-engineering and other Radeon work, says that the HD 7000 "Southern Islands" GPUs has a brand new HDMI engine so it may still be a while before the audio support works for this latest-generation AMD graphics hardware. "I've spent 2 full days analyzing and hacking GPU registers without any success. Enabling HDMI mode works just fine, but audio doesn't play. I'm afraid just watching GPU registers won't allow us to RE audio support. We may need specs which personally I don't expect to see anytime soon, or alternatively we may need some hack to dump MMIO operations done by fglrx."

Rafał shared this work on his blog.

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 Linux Hardware Reviews
  1. Trying The Configurable 45 Watt TDP With AMD's A10-7800 / A6-7400K
  2. Sumo's Omni Gets Reloaded
  3. AMD A10-7800 & A6-7400K APUs Run Great On Linux
  4. Radeon Gallium3D Is Running Increasingly Well Against AMD's Catalyst Driver
Latest Linux Articles
  1. AMD's RadeonSI Driver Sped Up A Lot This Summer
  2. Intel's Latest Linux Graphics Code Competes Against OS X 10.9
  3. Intel Sandy Bridge Gets A Surprise Boost From Linux 3.17
  4. Open-Source Radeon Graphics Have Some Improvements On Linux 3.17
Latest Linux News
  1. Intel Bay Trail Performance With Linux 3.16/3.17 & Mesa 10.3
  2. EFL Sees A Ton Of Work Following Recent v1.11 Release
  3. ARM Talks Up Wayland For Mali
  4. GNOME/GTK+ Human Interface Guidelines Updated
  5. Robocraft Is Rolling Over To Linux
  6. The Widely-Criticized New Commercial Linux Distro Is Now On Kickstarter
  7. Wayland & Weston 1.6 Alpha Released
  8. A New First-Person Mystery Game Might Be Coming To Linux
  9. Patch By Patch, LLVM Clang Gets Better At Building The Linux Kernel
  10. VC4 Gallium3D Driver Now Handles X With GLAMOR
Latest Forum Discussions
  1. OSS radeon driver for A10-7850K (Kaveri)
  2. Btrfs Gets Talked Up, Googler Encourages You To Try Btrfs
  3. Systemd 216 Piles On More Features, Aims For New User-Space VT
  4. American Citizens running AMOK for food stamps
  5. What Linux Distribution Should Be Benchmarked The Most?
  6. Company I work for is looking to contribute to Open Source projects... but wrongly?
  7. Microsoft vs. Campaign
  8. Updated and Optimized Ubuntu Free Graphics Drivers