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diff --git a/docs/fbdev-dri.html b/docs/fbdev-dri.html new file mode 100644 index 000000000..18b0ca815 --- /dev/null +++ b/docs/fbdev-dri.html @@ -0,0 +1,315 @@ +<html> + +<TITLE>Mesa fbdev/DRI Environment</TITLE> + +<link rel="stylesheet" type="text/css" href="mesa.css"></head> + +<BODY> + +<center><H1>Mesa fbdev/DRI Drivers</H1></center> + + +<H1>1. Introduction</H1> + +<p> +The fbdev/DRI sub-project within Mesa brings hardware accelerated OpenGL +rendering to the Linux fbdev environment. +The X Window System / XFree86 is not needed. +</p> + +<p> +Basically, the <a href="http://dri.sf.net/">DRI</a> drivers for hardware +accelerated OpenGL for XFree86 have been ported to fbdev so that X is +not needed. +This means fbdev/DRI works in full-screen mode only. +</p> + +<p> +DRI driver writers may find this simplified environment easier to work in, +compared to the full XFree86/DRI environment. +</p> + +<p> +Much of the work for this project has been done by Jon Smirl and +Keith Whitwell. +</p> + +<p> +To use fbdev/DRI, you'll need a Linux 2.4 or 2.6 kernel. +</p> + +<h3>Background Info</h3> + +<p> +The Mesa-based DRI drivers used to be hosted in the DRI tree (which is +basically a copy of the XFree86 tree). +Since the Mesa-based DRI drivers are moreso "Mesa drivers" than "XFree86 +drivers" and the fact that with some work, the drivers could be used +without X, the driver code was moved into the Mesa tree. +</p> + +<p> +So now the DRI drivers can be compiled for two different environments: +fbdev and XFree86. +To build the drivers for XFree86, one has to download/build the DRI +source tree. +Eventually, we'd like to be able to build the drivers for XFree86 outside +of the XFree86/DRI trees. +</p> + + + + +<h1>2. Compilation</h1> + +<h2>2.1 Compiling the DRM modules</h2> + +<p> +First, you'll need the DRM (Direct Rendering Manager) kernel module sources. +They're found in a module of the DRI CVS tree. +To obtain the code do the following: +</p> +<pre> + cvs -d:pserver:anonymous@pdx.freedesktop.org:/cvs/dri login +</pre> +<p> +Press Enter/Return when prompted for a password. Then, +</p> +<pre> + cvs -d:pserver:anonymous@pdx.freedesktop.org:/cvs/dri co drm +</pre> + +<p> +Compile the DRM kernel modules: +</p> +<pre> + cd drm/linux + make +</pre> + +<p> +Note: you may need to be root in order to make a few symlinks. +</p> +<p> +When compilation is done, you should have at least the following +kernel modules: +</p> +<pre> + gamma.o + i810.o + i830.o + mach64.o + mga.o + r128.o + radeon.o + savage.o + sis.o + tdfx.o + via.o +</pre> +<p> +You'll probably want to copy/move them into your kernel module directory +(for example: <code>/lib/modules/2.4.18-14/kernel/drivers/char/drm/</code>). +</p> + + + +<h2>2.2 Compiling the Mesa drivers</h2> + +<p> +Begin by editing the <code>Mesa/configs/default</code> file to set +the <code>DRM_SOURCE_PATH</code> variable. +Set it to the location where the DRM module sources are located. +For example, if your current directory in step 2.1 was <code>/home/fred/</code> +set DRM_SOURCE_PATH to <code>/home/fred/drm</code> +</p> + +<p> +Next, assuming you're starting with a fresh Mesa CVS checkout, +do the following: +</p> +<pre> + make linux-solo +</pre> + +<p> +If you previously built the source tree, run <code>make realclean</code> +first to remove the old object files. +</p> + +<p> +When this is finished, check the <code>Mesa/lib/</code> directory +to verify that the following files were made: +</p> + +<ul> +<li><code>libGL.so.1.2</code> - the client-side OpenGL library + (and a few symlinks to it). +<li><code>libGLU.so.1.1</code> - the GLU library (and a few symlinks to it). +<li><code>libglut.so.3.7</code> - the GLUT library (and a few symlinks to it). +<li><code>mga_dri.so</code> - DRI driver for Matrox G200/G400 cards. +<li><code>r128_dri.so</code> - DRI driver for ATI Rage 128 cards. +<li><code>r200_dri.so</code> - DRI driver for ATI R200 Radeon cards. +<li><code>radeon_dri.so</code> - DRI driver for original ATI Radeon cards. +<li><code>i810_dri.so</code> - DRI driver for Intel i810/i815 chips. +<li><code>i830_dri.so</code> - DRI driver for Intel i830/i845 chips. +<li><code>mga_dri.so</code> - DRI driver for Matrox G200/G400 cards. +<li><code>sis_dri.so</code> - DRI driver for SIS cards. +<li><code>tdfx_dri.so</code> - DRI driver for 3dfx Voodoo 3/4/5 cards. +<li><code>gamma_dri.so</code> - DRI driver for 3Dlabs gamma cards. +<li><code>fb_dri.so</code> - software-only fbdev driver. +<li><code>miniglx.conf</code> - configuration file for the MiniGLX interface +</ul> + + +<h1>3. Using fbdev/DRI</h1> + +<p> +If XFree86 is currently running, exit/stop the X server so you're +working from the console. +</p> + + +<h2>3.1 Load Kernel Modules</h2> + +<p> +You'll need to load the kernel modules specific to your graphics hardware. +Typically, this consists of the agpgart module, an fbdev driver module +and the DRM kernel module (from step 2.1). +</p> + + +<p> +If you have ATI Radeon/R200 hardware, run as root: +</p> +<pre> + modprobe agpgart # the AGP GART module + modprobe radeonfb # the Radeon fbdev driver + modprobe radeon # the Radeon DRI kernel module +</pre> + +<p> +If you have ATI Rage 128 hardware, run as root: +</p> +<pre> + modprobe agpgart # the AGP GART module + modprobe aty128fb # the Rage 128 fbdev driver + modprobe r128 # the Rage 128 DRI kernel module +</pre> + +<p> +If you have Matrox G200/G400 hardware, run as root: +</p> +<pre> + modprobe agpgart # the AGP GART module + modprobe mgafb # the Matrox fbdev driver + modprobe mga # the Matrox DRI kernel module +</pre> + +<p> +Then run <code>lsmod</code> to be sure the modules are loaded. +For a Radeon card, you should see something like this: +</p> +<pre> +Module Size Used by Not tainted +radeon 110308 0 (unused) +radeonfb 21900 0 (unused) +agpgart 43072 1 +</pre> + + + +<h2>3.2 Configuration File</h2> + +<p> +The <code>Mesa/lib/miniglx.conf</code> file should be installed +in <code>/etc/</code>. +</p> + +<p> +Edit <code>/etc/miniglx.conf</code> to be sure it's set up correctly +for your hardware. +Comments in the file explain the options. +</p> + + +<h2>3.3 Running fbdev/DRI Programs</h2> + +<p> +Make sure your LD_LIBRARY_PATH environment variable is set to the +<code>Mesa/lib/</code> directory. +</p> + +<p> +Change to the <code>Mesa/progs/miniglx/</code> directory and +start the sample_server program in the background: +</p> +<pre> + ./sample_server & +</pre> + +<p> +Then try running the <code>miniglxtest</code> program: +</p> +<pre> + ./miniglxtest +</pre> +<p> +You should see a rotating quadrilateral which changes color as it rotates. +It will exit automatically after a bit. +</p> + +<p> +If you run other tests in the miniglx/ directory, you may want to run +them from a remote shell so that you can stop them with ctrl-C. +</p> + + + +<h1>4.0 Troubleshooting</h1> + +<p> +If you try to run miniglxtest and get the following: +</p> +<pre> + [miniglx] failed to probe chipset + connect: Connection refused + server connection lost +</pre> +<p> +It means that the sample_server process is not running. +</p> + + + + +<h1>5.0 Programming Information</h1> + +<p> +The full OpenGL API is available with fbdev/DRI. +</p> + +<p> +OpenGL/Mesa is interfaced to fbdev via the <a href="MiniGLX.html">MiniGLX</a> +interface. +MiniGLX is a subset of Xlib and GLX API functions which provides just +enough functionality to setup OpenGL rendering and respond to simple +input events. +</p> + +<p> +Since MiniGLX is a subset of the usual Xlib and GLX APIs, programs written +to the MiniGLX API can also be run on full Xlib/GLX implementations. +This allows some degree of flexibility for software development and testing. +</p> + +<p> +However, the MiniGLX API is not binary-compatible with full Xlib/GLX. +Some of the structures are different and some macros/functions work +differently. +See the <code>GL/miniglx.h</code> header file for details. +</p> + + +</body> +</html> |