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Jesper Juhl 6180dbda20 While reading some code I stumbled across the use of 'err' in 
drivers/char/drm/mga_dma.c::mga_do_cleanup_dma() and I think there's a small
problem.

The variable is only used inside #if __OS_HAS_AGP which is fine, but all
that
ever happens is an assignment to the variable - it is never actually used
for
anything.  The variable is nicely initialized to zero which is also what the
return statement at the end of function returns (always at the moment).

It looks to me like that function should be returning 'err' instead of
always
just returning 0.  Here's a patch to do that.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 		2007-12-17 09:45:03 +10:00
bsd-core bsd: Replace other occurrences of msleep with mtx_sleep 2007-12-02 01:45:09 -05:00
libdrm Fill fence sequence after emit ioctl. 2007-11-05 04:44:40 +11:00
linux-core Document drm_ttm_set_user. 2007-12-15 12:10:42 -08:00
scripts drm: update kernel generator script using v4l script 2007-11-05 12:56:55 +10:00
shared-core While reading some code I stumbled across the use of 'err' in 2007-12-17 09:45:03 +10:00
tests Fix ttmtest. 2007-11-13 15:47:20 +01:00
.gitignore Add a set of tests for DRM locking, exposing issues on BSD. 2007-08-15 13:41:24 -07:00
Makefile.am Add some trivial regression tests, one of which fails. 2007-07-19 04:59:59 -07:00
README More detailed instructions, tips. 2007-04-25 14:52:29 -06:00
autogen.sh update autogen from xserver tree 2005-09-12 06:21:24 +00:00
configure.ac Add some trivial regression tests, one of which fails. 2007-07-19 04:59:59 -07:00
libdrm.pc.in Better pkgconfig-fu: -ldrm in Libs: 2005-10-13 21:03:31 +00:00

README 

DRM README file


There are two main parts to this package: the DRM client library/interface
(libdrm.so) and kernel/hardware-specific device modules (such as i915.ko).



Compiling
---------

By default, libdrm and the DRM header files will install into /usr/local/.
If you want to install this DRM to replace your system copy, say:

	./configure --prefix=/usr --exec-prefix=/

Then,
	make install


To build the device-specific kernel modules:

	cd linux-core/
	make
	cp *.ko /lib/modules/VERSION/kernel/drivers/char/drm/
	   (where VERSION is your kernel version: uname -f)

Or,
	cd bsd-core/
	make
	copy the kernel modules to the appropriate place



Tips & Trouble-shooting
-----------------------

1. You'll need kernel sources.  If using Fedora Core 5, for example, you may
   need to install RPMs such as:

	kernel-smp-devel-2.6.15-1.2054_FC5.i686.rpm
	kernel-devel-2.6.15-1.2054_FC5.i686.rpm
	etc.


2. You may need to make a symlink from /lib/modules/VERSION/build to your
   kernel sources in /usr/src/kernels/VERSION (where version is `uname -r`):

	cd /lib/modules/VERSION
	ln -s /usr/src/kernels/VERSION build


3. If you've build the kernel modules but they won't load because of an
   error like this:

	$ /sbin/modprobe drm
	FATAL: Error inserting drm (/lib/modules/2.6.15-1.2054_FC5smp/kernel/drivers/char/drm/drm.ko): Invalid module format

   And 'dmesg|tail' says:

	drm: disagrees about version of symbol struct_module 

   Try recompiling your drm modules without the Module.symvers file.
   That is rm the /usr/src/kernels/2.6.15-1.2054_FC5-smp-i686/Module.symvers
   file (or rename it).  Then do a 'make clean' before rebuilding your drm
   modules.