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/*
* 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/sysfb.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 = &sysfb_primary_display.screen;
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;
#ifdef CONFIG_SCREEN_INFO
numres = screen_info_resources(si, res, ARRAY_SIZE(res));
if (numres > 0) {
for (i = 0; i < numres; ++i) {
if (!(res[i].flags & IORESOURCE_MEM))
continue;
if (pci_find_resource(pdev, &res[i]))
return true;
}
return false;
}
#endif
/*
* No framebuffer was set up by the firmware/bootloader, so fall back
* to the default VGA device.
*/
return pdev == vga_default_device();
}
EXPORT_SYMBOL(video_is_primary_device);
MODULE_LICENSE("GPL");
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