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powerpc: Set default VGA device 

Add a PCI quirk for VGA devices on Power to set the default VGA device.
Ensures a default VGA is always set if a graphics adapter is present,
even if firmware did not initialize it. If more than one graphics
adapter is present, ensure the one initialized by firmware is set
as the default VGA device. This ensures that X autoconfiguration
will work.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
This commit is contained in:
Brian King 2013-04-08 03:05:10 +00:00 committed by Michael Ellerman
parent 88e7b167a0
commit c2e1d84523
1 changed files with 13 additions and 0 deletions
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13
arch/powerpc/kernel/pci-common.c
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@ -30,6 +30,7 @@
#include <linux/irq.h>
#include <linux/vmalloc.h>
#include <linux/slab.h>
#include <linux/vgaarb.h>
#include <asm/processor.h>
#include <asm/io.h>
@ -1734,3 +1735,15 @@ static void fixup_hide_host_resource_fsl(struct pci_dev *dev)
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MOTOROLA, PCI_ANY_ID, fixup_hide_host_resource_fsl);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, fixup_hide_host_resource_fsl);
static void fixup_vga(struct pci_dev *pdev)
{
u16 cmd;
pci_read_config_word(pdev, PCI_COMMAND, &cmd);
if ((cmd & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) || !vga_default_device())
vga_set_default_device(pdev);
}
DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID,
PCI_CLASS_DISPLAY_VGA, 8, fixup_vga);