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

Intel Broadwell GPU Support Pushed To Mesa Git Branch

Intel

Published on 03 November 2013 06:30 PM EST
Written by Michael Larabel in Intel
5 Comments

Earlier today I wrote at length about Intel open-sourcing their Broadwell graphics driver code for Linux support months ahead of the 2014 processor debut. Besides the kernel changes queued up for the Linux 3.13 kernel, the Broadwell OpenGL/3D driver support has turned up in a Mesa Git branch.

The Intel i965 Mesa DRI driver support has popped up in a Git code branch named Broadwell. The user-space driver support spans across nearly 50 patches and affects a great deal of the Mesa driver.

In digging through the code commits on Sunday afternoon, here's some quick comments:

- Right now there are GT1, GT2, and GT3 variants shown for the initial Broadwell processors. The Broadwell GT1 PCI IDs include 0x1602, 0x1606, 0x160A, 0x160B, 0x160D, and 0x160E. Broadwell GT2 PCI IDs are 0x1612, 0x1616, 0x161A, 0x161B, 0x161D, and 0x161E. Lastly, the high-end GT3 graphics for Broadwell are IDed as 0x1622, 0x1626, 0x162A, 0x162B, 0x162D, and 0x162E.

- Over Ivy Bridge / Haswell "Gen7" graphics, Broadwell "Gen8" claims support for a maximum of 280 VS threads over 36 on Gen7 hardware, a maximum of 256 GS threads over 36 on Gen7, and 64 WM threads over 48. The URB size has also quadrupled to 512 and the max VS entries supported are now 1664 over 512 and 640 GS entries over 192 on Gen7 hardware.

- BLORP and HiZ are temporarily disabled for Broadwell hardware right now but should be enabled in the coming months for faster performance.

- Broadwell has significant changes to the EU instruction encoding. Broadwell's new instruction encoding has also meant having to write a gen shader disassembler for the DRI driver.

- There's new vec4 and fragment shader back-ends in the driver needed for Broadwell.

- Various other low-level driver changes were made for Broadwell's enablement.

More information on the Broadwell Mesa OpenGL driver changes can be found from the Git log.

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. MSI X99S SLI PLUS On Linux
  2. NVIDIA GeForce GTX 970 Offers Great Linux Performance
  3. CompuLab Intense-PC2: An Excellent, Fanless, Mini PC Powered By Intel's i7 Haswell
  4. From The Atom 330 To Haswell ULT: Intel Linux Performance Benchmarks
Latest Linux Articles
  1. Open-Source Radeon 2D Performance Is Better With Ubuntu 14.10
  2. RunAbove: A POWER8 Compute Cloud With Offerings Up To 176 Threads
  3. 6-Way Ubuntu 14.10 Linux Desktop Benchmarks
  4. Ubuntu 14.10 XMir System Compositor Benchmarks
Latest Linux News
  1. KDE With Theoretical Client-Side Decorations, Windows 10 Influence
  2. Sandusky Lee: Great Cabinets For Storing All Your Computer Gear
  3. Fedora 21 Beta & Final Release Slip Further
  4. Mesa 10.3.2 Has A Couple Bug-Fixes
  5. RadeonSI/R600g HyperZ Support Gets Turned Back On
  6. openSUSE Factory & Tumbleweed Are Merging
  7. More Fedora Delays: Fedora 21 Beta Slips
  8. Mono Brings C# To The Unreal Engine 4
  9. Coreboot Now Has Support For Intel Broadwell Hardware
  10. Enlightenment's EFL 1.12 Alpha Has Evas GL-DRM Engine, OpenGL ES 1.1 Support
Latest Forum Discussions
  1. Use Ubuntu MATE 14.10 Make it an official distro.
  2. HOPE: The Ease Of Python With The Speed Of C++
  3. Users/Developers Threatening Fork Of Debian GNU/Linux
  4. Debian Is Back To Discussing Init Systems, Freedom of Choice
  5. AMD Radeon VDPAU Video Performance With Gallium3D
  6. Updated and Optimized Ubuntu Free Graphics Drivers
  7. Ubuntu 16.04 Might Be The Distribution's Last 32-Bit Release
  8. Linux hacker compares Solaris kernel code: