1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
<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 environment supports hardware-accelerated 3D rendering without
the X window system. This is typically used for embedded applications.
</p>
<p>
Contributors to this project include Jon Smirl, Keith Whitwell and Dave Airlie.
</p>
<p>
Applications in the fbdev/DRI environment use
the <a href="MiniGXL.html"> MiniGLX</a> interface to choose pixel
formats, create rendering contexts, etc. It's a subset of the GLX and
Xlib interfaces allowing some degree of application portability between
the X and X-less environments.
</p>
<p>
Some of the files needed for building this configuration are not included
in the normal Mesa releases so you'll need to get the latest sources
sources from the <a href="repository.html">git repository</a>.
</p>
<p>
This fbdev/DRI environment isn't well supported.
Code and documentation updates/patches are welcomed.
</p>
<h1>2. Compilation</h1>
<p>
You'll need the DRM and pciaccess libraries. Check with:
</p>
<pre>
pkg-config --modversion libdrm
pkg-config --modversion pciaccess
</pre>
<p>
You can get them from the git repository with:
</p>
<pre>
git clone git://anongit.freedesktop.org/git/mesa/drm
git clone git://anongit.freedesktop.org/git/xorg/lib/libpciaccess
</pre>
<p>
See the README files in those projects for build/install instructions.
</p>
<p>
You'll need fbdev header files. Check with:
</p>
<pre>
ls -l /usr/include/linux/fb.h
</pre>
<p>
You'll need to get Mesa from git (see above).
Compile Mesa with the 'linux-solo' configuration:
</p>
<pre>
make linux-solo
</pre>
<p>
When complete you should have the following:
</p>
<ul>
<li>lib/libGL.so - the GL library which applications link with
<li>lib/*_dri_so - DRI drivers
<li>lib/miniglx.conf - sample MiniGLX config file
<li>progs/miniglx/* - several MiniGLX sample programs
</ul>
<h1>3. Using fbdev/DRI</h1>
<p>
If an X server currently running, exit/stop it 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.
</p>
<p>
As root, the kernel modules can be loaded as follows:
</p>
<p>
If you have Intel i915/i945 hardware:
</p>
<pre>
modprobe agpgart # the AGP GART module
modprobe intelfb # the Intel fbdev driver
modprobe i915 # the i915/945 DRI kernel module
</pre>
<p>
If you have ATI Radeon/R200 hardware:
</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:
</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:
</p>
<pre>
modprobe agpgart # the AGP GART module
modprobe mgafb # the Matrox fbdev driver
modprobe mga # the Matrox DRI kernel module
</pre>
<p>
To verify that the agpgart, fbdev and drm modules are loaded:
</p>
<pre>
ls -l /dev/agpgart /dev/fb* /dev/dri
</pre>
<p>
Alternately, use lsmod to inspect the currently installed modules.
If you have problems, look at the output of dmesg.
</p>
<h2>3.2 Configuration File</h2>
<p>
Copy the sample miniglx.conf to /etc/miniglx.conf and review/edit its contents.
Alternately, the MINIGLX_CONF environment variable can be used to
indicate the location of miniglx.conf
</p>
To determine the pciBusID value, run lspci and examine the output.
For example:
</p>
<pre>
/sbin/lspci:
00:02.0 VGA compatible controller: Intel Corporation 82915G/GV/910GL Express Chipset Family Graphics Controller (rev 04)
</pre>
<p>
00:02.0 indicates that pciBusID should be PCI:0:2:0
</p>
<h2>3.3 Running fbdev/DRI Programs</h2>
<p>
Make sure your LD_LIBRARY_PATH environment variable is set to the
location of the libGL.so library. You may need to append other paths
to LD_LIBRARY_PATH if libpciaccess.so is in a non-standard location,
for example.
</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>
<ol>
<li>
If you try to run miniglxtest and get the following:
<br>
<pre>
[miniglx] failed to probe chipset
connect: Connection refused
server connection lost
</pre>
It means that the sample_server process is not running.
<br>
<br>
</li>
</ol>
<h1>5.0 Programming Information</h1>
<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>
|
