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libdrm: add udev support. 

This patch allows you to --enable-udev, and will avoid having libdrm
make device nodes. If you are using udev, you should really --enable-udev
your libdrm.
main
Dave Airlie 2008-08-24 16:54:43 +10:00
parent 0da66c27fa
commit 9101a0205c
2 changed files with 32 additions and 0 deletions
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7
configure.ac
View File

@ -34,6 +34,9 @@ AC_SYS_LARGEFILE
pkgconfigdir=${libdir}/pkgconfig
AC_SUBST(pkgconfigdir)
AC_ARG_ENABLE(udev, AS_HELP_STRING([--enable-udev],
[Enable support for using udev instead of mknod (default: disabled)]),
[UDEV=$enableval], [UDEV=no])
dnl ===========================================================================
@ -101,6 +104,10 @@ AC_CACHE_CHECK([for supported warning flags], libdrm_cv_warn_cflags, [
AC_MSG_CHECKING([which warning flags were supported])])
WARN_CFLAGS="$libdrm_cv_warn_cflags"
if test "x$UDEV" = xyes; then
AC_DEFINE(UDEV, 1, [Have UDEV support])
fi
AC_SUBST(WARN_CFLAGS)
AC_OUTPUT([
Makefile

25
libdrm/xf86drm.c
View File

@ -297,6 +297,7 @@ static int drmOpenDevice(long dev, int minor)
group = (serv_group >= 0) ? serv_group : DRM_DEV_GID;
}
#if !defined(UDEV)
if (stat(DRM_DIR_NAME, &st)) {
if (!isroot)
return DRM_ERR_NOT_ROOT;
@ -317,6 +318,30 @@ static int drmOpenDevice(long dev, int minor)
chown(buf, user, group);
chmod(buf, devmode);
}
#else
/* if we modprobed then wait for udev */
{
int udev_count = 0;
wait_for_udev:
if (stat(DRM_DIR_NAME, &st)) {
usleep(20);
udev_count++;
if (udev_count == 50)
return -1;
goto wait_for_udev;
}
if (stat(buf, &st)) {
usleep(20);
udev_count++;
if (udev_count == 50)
return -1;
goto wait_for_udev;
}
}
#endif
fd = open(buf, O_RDWR, 0);
drmMsg("drmOpenDevice: open result is %d, (%s)\n",