1 files changed, 42 insertions, 0 deletions
diff --git a/kernel/arch/x86/video/fbdev.c b/kernel/arch/x86/video/fbdev.c
new file mode 100644
index 000000000..d5644bbe8
--- /dev/null
+++ b/kernel/arch/x86/video/fbdev.c
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2007 Antonino Daplas <adaplas@gmail.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ *
+ */
+#include <linux/fb.h>
+#include <linux/pci.h>
+#include <linux/module.h>
+#include <linux/vgaarb.h>
+
+int fb_is_primary_device(struct fb_info *info)
+{
+	struct device *device = info->device;
+	struct pci_dev *pci_dev = NULL;
+	struct pci_dev *default_device = vga_default_device();
+	struct resource *res = NULL;
+
+	if (device)
+		pci_dev = to_pci_dev(device);
+
+	if (!pci_dev)
+		return 0;
+
+	if (default_device) {
+		if (pci_dev == default_device)
+			return 1;
+		else
+			return 0;
+	}
+
+	res = &pci_dev->resource[PCI_ROM_RESOURCE];
+
+	if (res && res->flags & IORESOURCE_ROM_SHADOW)
+		return 1;
+
+	return 0;
+}
+EXPORT_SYMBOL(fb_is_primary_device);
+MODULE_LICENSE("GPL");