diff options
| author | Matthew Garrett <mjg@redhat.com> | 2012-04-16 16:26:02 -0400 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2012-04-24 09:50:15 +0100 |
| commit | 1a39b310e920bb7098067d96411b31e459ae8f32 (patch) | |
| tree | 90f45eed83bcd5308ac9ad850844d0b57038e5f8 /drivers | |
| parent | f122c6109b1a79153cfb1e188c665ce3f312a886 (diff) | |
vgaarb: Add support for setting the default video device (v2)
The default VGA device is a somewhat fluid concept on platforms with
multiple GPUs. Add support for setting it so switching code can update
things appropriately, and make sure that the sysfs code returns the right
device if it's changed.
v2: Updated to fix builds when __ARCH_HAS_VGA_DEFAULT_DEVICE is false.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Acked-by: benh@kernel.crashing.org
Cc: airlied@redhat.com
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/vga/vgaarb.c | 7 | ||||
| -rw-r--r-- | drivers/pci/pci-sysfs.c | 5 |
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c index 111d956d8e7..e223b96fa6a 100644 --- a/drivers/gpu/vga/vgaarb.c +++ b/drivers/gpu/vga/vgaarb.c @@ -136,6 +136,11 @@ struct pci_dev *vga_default_device(void) { return vga_default; } + +void vga_set_default_device(struct pci_dev *pdev) +{ + vga_default = pdev; +} #endif static inline void vga_irq_set_state(struct vga_device *vgadev, bool state) @@ -605,10 +610,12 @@ static bool vga_arbiter_del_pci_device(struct pci_dev *pdev) goto bail; } +#ifndef __ARCH_HAS_VGA_DEFAULT_DEVICE if (vga_default == pdev) { pci_dev_put(vga_default); vga_default = NULL; } +#endif if (vgadev->decodes & (VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM)) vga_decode_count--; diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index a55e248618c..86c63fe45d1 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -27,6 +27,7 @@ #include <linux/security.h> #include <linux/pci-aspm.h> #include <linux/slab.h> +#include <linux/vgaarb.h> #include "pci.h" static int sysfs_initialized; /* = 0 */ @@ -417,6 +418,10 @@ static ssize_t boot_vga_show(struct device *dev, struct device_attribute *attr, char *buf) { struct pci_dev *pdev = to_pci_dev(dev); + struct pci_dev *vga_dev = vga_default_device(); + + if (vga_dev) + return sprintf(buf, "%u\n", (pdev == vga_dev)); return sprintf(buf, "%u\n", !!(pdev->resource[PCI_ROM_RESOURCE].flags & |