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path: root/drivers/gpu/vga/vgaarb.c
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Diffstat (limited to 'drivers/gpu/vga/vgaarb.c')
-rw-r--r--drivers/gpu/vga/vgaarb.c72
1 files changed, 55 insertions, 17 deletions
diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c
index 76875f6299b8..d35d6d271f3f 100644
--- a/drivers/gpu/vga/vgaarb.c
+++ b/drivers/gpu/vga/vgaarb.c
@@ -1402,29 +1402,14 @@ static struct miscdevice vga_arb_device = {
MISC_DYNAMIC_MINOR, "vga_arbiter", &vga_arb_device_fops
};
-static int __init vga_arb_device_init(void)
+static void __init vga_arb_select_default_device(void)
{
- int rc;
struct pci_dev *pdev;
struct vga_device *vgadev;
- rc = misc_register(&vga_arb_device);
- if (rc < 0)
- pr_err("error %d registering device\n", rc);
-
- bus_register_notifier(&pci_bus_type, &pci_notifier);
-
- /* We add all pci devices satisfying vga class in the arbiter by
- * default */
- pdev = NULL;
- while ((pdev =
- pci_get_subsys(PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
- PCI_ANY_ID, pdev)) != NULL)
- vga_arbiter_add_pci_device(pdev);
-
+#if defined(CONFIG_X86) || defined(CONFIG_IA64)
list_for_each_entry(vgadev, &vga_list, list) {
struct device *dev = &vgadev->pdev->dev;
-#if defined(CONFIG_X86) || defined(CONFIG_IA64)
/*
* Override vga_arbiter_add_pci_device()'s I/O based detection
* as it may take the wrong device (e.g. on Apple system under
@@ -1461,13 +1446,66 @@ static int __init vga_arb_device_init(void)
vgaarb_info(dev, "overriding boot device\n");
vga_set_default_device(vgadev->pdev);
}
+ }
#endif
+
+ if (!vga_default_device()) {
+ list_for_each_entry(vgadev, &vga_list, list) {
+ struct device *dev = &vgadev->pdev->dev;
+ u16 cmd;
+
+ pdev = vgadev->pdev;
+ pci_read_config_word(pdev, PCI_COMMAND, &cmd);
+ if (cmd & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
+ vgaarb_info(dev, "setting as boot device (VGA legacy resources not available)\n");
+ vga_set_default_device(pdev);
+ break;
+ }
+ }
+ }
+
+ if (!vga_default_device()) {
+ vgadev = list_first_entry_or_null(&vga_list,
+ struct vga_device, list);
+ if (vgadev) {
+ struct device *dev = &vgadev->pdev->dev;
+ vgaarb_info(dev, "setting as boot device (VGA legacy resources not available)\n");
+ vga_set_default_device(vgadev->pdev);
+ }
+ }
+}
+
+static int __init vga_arb_device_init(void)
+{
+ int rc;
+ struct pci_dev *pdev;
+ struct vga_device *vgadev;
+
+ rc = misc_register(&vga_arb_device);
+ if (rc < 0)
+ pr_err("error %d registering device\n", rc);
+
+ bus_register_notifier(&pci_bus_type, &pci_notifier);
+
+ /* We add all PCI devices satisfying VGA class in the arbiter by
+ * default */
+ pdev = NULL;
+ while ((pdev =
+ pci_get_subsys(PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
+ PCI_ANY_ID, pdev)) != NULL)
+ vga_arbiter_add_pci_device(pdev);
+
+ list_for_each_entry(vgadev, &vga_list, list) {
+ struct device *dev = &vgadev->pdev->dev;
+
if (vgadev->bridge_has_one_vga)
vgaarb_info(dev, "bridge control possible\n");
else
vgaarb_info(dev, "no bridge control possible\n");
}
+ vga_arb_select_default_device();
+
pr_info("loaded\n");
return rc;
}