1 files changed, 64 insertions, 0 deletions
diff --git a/arch/x86/video/video-common.c b/arch/x86/video/video-common.c
new file mode 100644
index 000000000000..e0aeee99bc99
--- /dev/null
+++ b/arch/x86/video/video-common.c
@@ -0,0 +1,64 @@
+/*
+ * 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/module.h>
+#include <linux/pci.h>
+#include <linux/screen_info.h>
+#include <linux/vgaarb.h>
+
+#include <asm/video.h>
+
+pgprot_t pgprot_framebuffer(pgprot_t prot,
+			    unsigned long vm_start, unsigned long vm_end,
+			    unsigned long offset)
+{
+	pgprot_val(prot) &= ~_PAGE_CACHE_MASK;
+	if (boot_cpu_data.x86 > 3)
+		pgprot_val(prot) |= cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS);
+
+	return prot;
+}
+EXPORT_SYMBOL(pgprot_framebuffer);
+
+bool video_is_primary_device(struct device *dev)
+{
+#ifdef CONFIG_SCREEN_INFO
+	struct screen_info *si = &screen_info;
+	struct resource res[SCREEN_INFO_MAX_RESOURCES];
+	ssize_t i, numres;
+#endif
+	struct pci_dev *pdev;
+
+	if (!dev_is_pci(dev))
+		return false;
+
+	pdev = to_pci_dev(dev);
+
+	if (!pci_is_display(pdev))
+		return false;
+
+	if (pdev == vga_default_device())
+		return true;
+
+#ifdef CONFIG_SCREEN_INFO
+	numres = screen_info_resources(si, res, ARRAY_SIZE(res));
+	for (i = 0; i < numres; ++i) {
+		if (!(res[i].flags & IORESOURCE_MEM))
+			continue;
+
+		if (pci_find_resource(pdev, &res[i]))
+			return true;
+	}
+#endif
+
+	return false;
+}
+EXPORT_SYMBOL(video_is_primary_device);
+
+MODULE_LICENSE("GPL");