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xf86-video-geode -- AMD Geode GX and LX graphics driver for X.org
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=================================================================
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README last updated: 2011-11-24
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This is the X graphics driver for the AMD Geode GX and LX processors.
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The GX component supports both XAA and EXA for graphics acceleration.
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The LX component supports EXA, including compositing. Both support Xv
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overlay and dynamic rotation with XRandR. Additionally, a V4L2 driver
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for the LX's video input port (VIP) feature is provided as "ztv".
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Since version 2.9.0, this driver depends on X server 1.3 or greater,
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because it utilizes the new common DDC probing libraries from X.Org.
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Support for old GX1 Geodes by Cyrix and NSC will be reintroduced soon,
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at which point xf86-video-cyrix and xf86-video-nsc will be retired.
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Until then, the current situation for Geode coverage is as follow:
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* Geode LX (a.k.a. GX3) PCI ID 0x1022:0x2081
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* Geode GX (a.k.a. GX2) PCI ID 0x100B:0x0030 (re-branded GX2)
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* Geode GX2 (a.k.a. GX2) PCI ID 0x100B:0x0030 (a.k.a. "Red Cloud")
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* Geode SCx200 (a.k.a. GX1) PCI ID 0x100B:0x0504
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* Geode SC1400 (a.k.a. GX1) PCI ID 0x100B:0x0104
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* Geode MediaGX (a.k.a. GX1) PCI ID 0x1078:0x0104
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Please note that both NSC and GEODE support GX2. This is indeed correct.
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However, only GEODE has up-to-date code, while NSC is deprecated.
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The driver supports all maximum resolutions advertised by AMD, namely:
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LX: 1920x1440 (CRT) and 1600x1200 (TFT)
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GX: 1600x1200 (CRT) and 1280x1024 (TFT)
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SC: 1280x1024 (CRT/TFT) *** Currently unsupported by this driver ***
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5.CONFIGURATION OPTIONS
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You can specify driver options in /etc/X11/xorg.conf in the usual fashion:
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Identifier "AMD Geode"
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Option "OptionName" "value"
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The following options may be added to such a Device section:
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FBSize: Specify the size of the video space (in bytes)
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NoAccel: Disable hardware assisted acceleration
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NoCompression: Disable video bandwidth compression
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NoPanel: Disable panel support
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Rotate: Select an initial orientation - LEFT, INVERT, CCW
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SWCursor: Enable software cursors (essentially disabling HW cursor support)
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5.2.GX-SPECIFIC OPTIONS
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AccelMethod: "XAA" (default) or "EXA"
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PanelGeometry: Specify the geometry of the attached panel ("<width>x<height>")
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OSMImageBuffers: Set the number of image buffers (XAA only)
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OSMColorExpBuffers: Set the number of color expansion buffers (XAA only)
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5.3.LX-SPECIFIC OPTIONS
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ExaScratch: Specify the amount of extra EXA scratch buffer (in bytes)
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6.FREQUENTLY ASKED QUESTIONS (FAQ)
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Q: Why doesn't the GEODE driver work at WXGA (wide screen) resolutions?
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A: Make sure that TFT Panel support is disabled in the BIOS settings,
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otherwise resolutions will be restricted to traditional VGA modes.
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The GEODE offers a choice between CRT-only, CRT+TFT, TFT-only for
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output device and selecting CRT-only removes the VGA restriction.
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Q: How can these hardcoded modes be expanded to support a WXGA laptop?
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A: By adding the desired modes to /etc/X11/xorg.conf as follow:
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1) Use either the "cvt" or "gtf" command to determine the modeline:
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Where 1024x600 is the resolution and 60 the refresh rate.
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The resulting modeline using "gtf" is:
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Modeline "1024x600" 48.96 1024 1064 1168 1312 600 601 604 622 -hsync +vsync
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2) Add it to the bottom of the "Monitor" section in /etc/X11/xorg.conf.
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In this example, we created entries for two modes and configured the
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larger resolution to be our preferred choice.
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#############################################################
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# /etc/X11/xorg.conf for 1024x600 and 800x480 laptop panels #
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#############################################################
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#### By J.KASPER and B.HIBRY #### for Hercules eCafe 800 ####
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#############################################################
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Option "PanelMode" "33450 800 840 968 1056 480 490 492 525"
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Identifier "monitor0"
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Modeline "1024x768" 64.56 1024 1056 1296 1328 768 783 791 807 -hsync +vsync
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Modeline "1024x600" 48.96 1024 1064 1168 1312 600 601 604 622 -hsync +vsync
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Modeline "800x480" 33.45 800 840 968 1056 480 490 492 525 -hsync +vsync
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Identifier "Default Screen"
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Modes "1024x600" "1024x768" "800x480"
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Q: Why doesn't screen rotation work?
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A: Make sure that a sufficient amount of video RAM is reserved in the BIOS,
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otherwise rotation will fail and this error message appear in Xorg.log:
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Couldn't allocate the shadow memory for rotation
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You need XX bytes, but only YY bytes are available
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Q: How do I produce useful information whenever submitting a bug report?
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A: See http://www.x.org/wiki/Development/Documentation/ServerDebugging
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and follow the instructions found there.
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Q: How do I test development snapshots from the upstream GIT repository?
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A: Run the following commands from a command line interpreter shell:
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1. git clone git://anongit.freedesktop.org/git/xorg/driver/xf86-video-geode
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2. Debian/Ubuntu: apt-get install autoconf automake libtool xutils-dev
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apt-get install build-dep xserver-xorg-video-geode
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Fedora/Red Hat: yum install autoconf automake libtool xorg-x11-util-macros
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yum-builddep xorg-x11-drv-geode
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3. cd xf86-video-geode
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...then install the driver manually.
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Q: What is the preferred method for submitting patches to this driver?
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A: See http://www.x.org/wiki/Development/Documentation/SubmittingPatches
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and submit the patches to the Geode X.org mailing list or to Bugzilla
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against product "xorg" component "Driver/geode".
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http://www.x.org/wiki/GeodeDriver
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http://lists.freedesktop.org/mailman/listinfo/xorg-driver-geode
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https://bugs.freedesktop.org/enter_bug.cgi?product=xorg&component=Driver%2Fgeode
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http://cgit.freedesktop.org/xorg/driver/xf86-video-geode
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git://anongit.freedesktop.org/git/xorg/driver/xf86-video-geode
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#geode on the Freenode network.
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