From ae4db652377d8add444fa2d9dfe5a398d7f64a80 Mon Sep 17 00:00:00 2001
From: kostikbel <kib@freebsd.org>
Date: Thu, 21 Feb 2013 20:02:00 +0000
Subject: [PATCH 2/3] =?UTF-8?q?drm:=20Add=20support=20for=20FreeBSD=E2=80=99?=
 =?UTF-8?q?s=20libkms?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Patch from http://people.freebsd.org/~kib/drm/libdrm.2.patch
---
 configure.ac  |  1 +
 xf86drmMode.c | 32 +++++++++++++++++++++++++++++++-
 2 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 3e7c214..8f32f2b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -196,6 +196,7 @@ AC_CANONICAL_HOST
 if test "x$LIBKMS" = xauto ; then
 	case $host_os in
 		linux*)		LIBKMS="yes" ;;
+		freebsd*)	LIBKMS="yes" ;;
 		*)		LIBKMS="no" ;;
 	esac
 fi
diff --git a/xf86drmMode.c b/xf86drmMode.c
index f603ceb..36ae139 100644
--- a/xf86drmMode.c
+++ b/xf86drmMode.c
@@ -689,7 +689,7 @@ int drmModeConnectorSetProperty(int fd, uint32_t connector_id, uint32_t property
 */
 int drmCheckModesettingSupported(const char *busid)
 {
-#ifdef __linux__
+#if defined (__linux__)
 	char pci_dev_dir[1024];
 	int domain, bus, dev, func;
 	DIR *sysdir;
@@ -739,6 +739,36 @@ int drmCheckModesettingSupported(const char *busid)
 	closedir(sysdir);
 	if (found)
 		return 0;
+#elif defined (__FreeBSD__)
+	char kbusid[1024], sbusid[1024];
+	char oid[128];
+	int domain, bus, dev, func;
+	int i, modesetting, ret;
+	size_t len;
+
+	ret = sscanf(busid, "pci:%04x:%02x:%02x.%d", &domain, &bus, &dev, &func);
+	if (ret != 4)
+		return -EINVAL;
+	snprintf(kbusid, sizeof(kbusid), "pci:%04x:%02x:%02x.%d", domain, bus, dev, func);
+
+	/* How many GPUs do we expect in the machine? */
+	for (i = 0; i < 16; i++) {
+		snprintf(oid, sizeof(oid), "hw.dri.%d.busid", i);
+		ret = sysctlbyname(oid, sbusid, &len, NULL, 0);
+		if (ret == -1) {
+			if (errno == ENOENT)
+				continue;
+			return -EINVAL;
+		}
+		if (strcmp(sbusid, kbusid) != 0)
+			continue;
+		snprintf(oid, sizeof(oid), "hw.dri.%d.modesetting", i);
+		len = sizeof(modesetting);
+		ret = sysctlbyname(oid, &modesetting, &len, NULL, 0);
+		if (ret == -1 || len != sizeof(modesetting))
+			return -EINVAL;
+		return (modesetting ? 0 : -ENOSYS);
+	}
 #endif
 	return -ENOSYS;
 
-- 
1.7.11.7