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

AMD Releases ACPI Header For Open-Source GPU Driver

AMD

Published on 28 July 2012 08:02 AM EDT
Written by Michael Larabel in AMD
42 Comments

For those that didn't notice, this week AMD released a new header that defines the AMD ACPI interface used for laptops, PowerXpress, and chipset-specific functionality.

This new header defines four ACPI control methods used by AMD graphics hardware and then related functionality to them. The four AMD ACPI methods are ATIF, ATPX, ATRM, and ATCS.

The new header can be viewed on the dri-devel mailing list. The header file is over 400 lines of new code.

While the patch integrates the new AMD ACPI header file and updates the relevant code, still on the TODO list is hooking up and handling ACPI notifications, making PowerXpress code more robust, and implementing PCI Express Gen and width switching using ACPI.

This new AMD ACPI header file came shortly after John Bridgman was mentioning in our forums that they are working to release new power management code for their open-source Radeon Linux graphics driver. "...AMD has not yet opened up all of the PM bits of the GPU (but as I said before we are working on that again since it doesn't look like community devs are going to go any further with what has already been released), so it loses in the performance-per-watt when the system is idle (an oxymoron if ever there was one)..."

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. Samsung 850 EVO SSD Linux Benchmarks
  2. Kubuntu 15.04 Is Turning Out Quite Nice, Good Way To Try Out The Latest KDE
  3. 5-Way Linux Distribution Comparison On The Core i3 NUC
  4. OCZ ARC 100 Linux SSD Benchmarks
  5. Lenovo ThinkPad X1 Carbon Works Great As A Linux Ultrabook
  6. Transcend SSD370 256GB
Latest Linux News
  1. Kdenlive Ported To Qt5/KF5, Coming To KDE Applications 15.04
  2. HTC & Valve Partnered Up For The Steam VR Headset
  3. 8cc: A Small C11 Compiler
  4. Not Everyone Likes The Possible "VULKAN" Name For Next-Gen OpenGL
  5. The Binary Blobs Making Up Coreboot
  6. Linux 4.0 & LLVM vs. GCC Yielded Much Interest This Month
  7. XBMC/Kodi 15.0 Alpha 1 Released
  8. Xfce 4.12 Released After Nearly Three Years Of Work
  9. The Khronos Group Filed A Trademark On "Vulkan" API
  10. Mozilla Thunderbird Adoption Climbs, Thunderbird 38 In May
Most Viewed News This Week
  1. Linux 4.0-RC1 Tagged, Linux 4.0 Will Bring Many Notable Improvements
  2. Screenshots Of The GNOME 3.16 Changes
  3. More Proof That Allwinner Is Violating The GPL
  4. The Tremendous Features Of Fedora 22
  5. Krita 2.9 Released, Their Biggest Release Ever
  6. Linux 4.0 Doesn't Have The Weirdest Codename
  7. A Single UEFI Executable With The Linux Kernel, Initrd & Command Line
  8. Canonical Comes Up With Its Own FUSE Filesystem For Linux Containers
%%CLICK_URL_UNESC%%