65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
/*
|
|
* 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");
|