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

A KMS Driver Arrives For AST Hardware

Linux Kernel

Published on 23 April 2012 10:02 AM EDT
Written by Michael Larabel in Linux Kernel
6 Comments

A kernel mode-setting (KMS) driver for new hardware has been published.

Red Hat's David Airlie has published an initial KMS driver for AST, the ASpeed Technologies chips found in some servers with graphics capabilities. This driver supports the AST 2000, 2100, 2200, 2150 and 2300 chipsets.

For those not familiar with ASpeed, an eight-year-old company, their AST2300 is described as an "Advanced PCIe Graphics & Remote Management Processor" with 2D video graphics, native PCI Express support, iKVM, DDR2/DDR3 support, and an ARMv9 400MHz processor. The company has made drivers for Red Hat Enterprise Linux 3/4/5/6, SuSE Linux Enterprise Server 9/10/11, Solaris x86, and various flavors of Windows.

With this being a server-oriented graphics chip, the AST KMS driver design is a bit different from the other Linux KMS drivers and it ends up putting the KMS console into system RAM since the video RAM on these chips tend to be low capacity. The driver then does dirty updates to a copy in the video RAM. When user-space sets a new scanout buffer it then forcefully evicts the video RAM console so X can create a frame-buffer using all of the video RAM.

The AST DRM/KMS driver is using TTM for video memory management.

There isn't going to be a user-space driver for the ASpeed hardware but rather this driver is intended to go with the xf86-video-modesetting DDX driver.

This new ASpeed KMS driver by David Airlie measures in at just over 3,200 lines of code. David Airlie worked on this driver as part of his development efforts for Red Hat so presumably they'll be looking to get this pulled into the mainline tree, likely for the Linux 3.5 kernel.

This initial ASpeed KMS driver can be found for now on dri-devel.

Latest Linux Hardware Reviews
  1. ASUS AM1I-A: A Mini-ITX Board For Socketed Kabini APUs
  2. Mini-Box M350: A Simple, Affordable Mini-ITX Case
  3. Overclocking The AMD AM1 Athlon & Sempron APUs
  4. AMD Athlon 5350 / 5150 & Sempron 3850 / 2650
Latest Linux Articles
  1. Ubuntu 12.04.4 vs. 13.10 vs. 14.04 LTS Desktop Benchmarks
  2. AMD OpenCL Performance With AM1 Kabini APUs
  3. A Quick Look At GCC 4.9 vs. LLVM Clang 3.5
  4. Are AMD Athlon/Sempron APUs Fast Enough For Steam On Linux?
Latest Linux News
  1. FreeBSD Advances For ARM, Bhyve, Clang
  2. Ubuntu 14.04 LTS "Trusty Tahr" Officially Released
  3. Ubuntu 12.04 LTS vs. 14.04 LTS Server Benchmarks
  4. QEMU 2.0 Released With ARM, x86 Enhancements
  5. Running The Unity 8 Preview Session On Ubuntu 14.04 LTS
  6. R600 Gallium3D Disables LLVM Back-End By Default
  7. Fedora 21 Gets GNOME 3.12, PHP 5.6, Mono 3.4
  8. Fedora Workstation Is Making Me Quite Excited
  9. Maynard: A Lightweight Wayland Desktop
  10. Chromium Browser Going Through Growing Pains In Ubuntu 14.04
  11. KDE 4.13 Is Being Released Today With New Features
  12. Trying Out Radeon R9 290 Graphics On Open-Source
Latest Forum Discussions
  1. Radeon 8000M problematic on Linux?
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  4. The GNOME Foundation Is Running Short On Money
  5. After Jack Keane, RuseSoft will briing Ankh 3 to Linux through Desura
  6. Suspected PHP Proxy Issue
  7. Change installation destination from home directory
  8. Bye bye BSD, Hello Linux: A Sys Admin's Story