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
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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(-)

Index: libdrm-bisect/configure.ac
===================================================================
--- libdrm-bisect.orig/configure.ac	2013-09-19 13:28:24.000000000 +0200
+++ libdrm-bisect/configure.ac	2013-09-19 13:28:24.744937559 +0200
@@ -185,6 +185,7 @@
 if test "x$LIBKMS" = xauto ; then
 	case $host_os in
 		linux*)		LIBKMS="yes" ;;
+		*freebsd*)	LIBKMS="yes" ;;
 		*)		LIBKMS="no" ;;
 	esac
 fi
Index: libdrm-bisect/xf86drmMode.c
===================================================================
--- libdrm-bisect.orig/xf86drmMode.c	2013-09-19 13:28:24.000000000 +0200
+++ libdrm-bisect/xf86drmMode.c	2013-09-19 13:32:43.085063015 +0200
@@ -704,7 +704,7 @@
 */
 int drmCheckModesettingSupported(const char *busid)
 {
-#ifdef __linux__
+#if defined (__linux__)
 	char pci_dev_dir[1024];
 	int domain, bus, dev, func;
 	DIR *sysdir;
@@ -754,6 +754,37 @@
 	closedir(sysdir);
 	if (found)
 		return 0;
+#elif defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
+	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);
+		len = sizeof(sbusid);
+		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;