From: Huacai Chen chenhuacai@loongson.cn
If there's no default VGA device, and we find a VGA device that owns the legacy VGA resources, we make that device the default. Split this logic out from vga_arbiter_add_pci_device() into a new function, vga_arb_update_default_device().
[bhelgaas: split another piece to separate patch] Link: https://lore.kernel.org/r/20210705100503.1120643-1-chenhuacai@loongson.cn Signed-off-by: Huacai Chen chenhuacai@loongson.cn Signed-off-by: Bjorn Helgaas bhelgaas@google.com --- drivers/pci/vgaarb.c | 25 ++++++++++++++++--------- 1 file changed, 16 insertions(+), 9 deletions(-)
diff --git a/drivers/pci/vgaarb.c b/drivers/pci/vgaarb.c index a6a5864ff538..4cecb599f5ed 100644 --- a/drivers/pci/vgaarb.c +++ b/drivers/pci/vgaarb.c @@ -577,6 +577,21 @@ static bool vga_arb_integrated_gpu(struct device *dev) } #endif
+static void vga_arb_update_default_device(struct vga_device *vgadev) +{ + struct pci_dev *pdev = vgadev->pdev; + + /* + * If we don't have a default VGA device yet, and this device owns + * the legacy VGA resources, make it the default. + */ + if (!vga_default_device() && + ((vgadev->owns & VGA_RSRC_LEGACY_MASK) == VGA_RSRC_LEGACY_MASK)) { + vgaarb_info(&pdev->dev, "setting as boot VGA device\n"); + vga_set_default_device(pdev); + } +} + /* * Rules for using a bridge to control a VGA descendant decoding: if a bridge * has only one VGA descendant then it can be used to control the VGA routing @@ -704,15 +719,7 @@ static bool vga_arbiter_add_pci_device(struct pci_dev *pdev) bus = bus->parent; }
- /* Deal with VGA default device. Use first enabled one - * by default if arch doesn't have it's own hook - */ - if (!vga_default_device() && - ((vgadev->owns & VGA_RSRC_LEGACY_MASK) == VGA_RSRC_LEGACY_MASK)) { - vgaarb_info(&pdev->dev, "setting as boot VGA device\n"); - vga_set_default_device(pdev); - } - + vga_arb_update_default_device(vgadev); vga_arbiter_check_bridge_sharing(vgadev);
/* Add to the list */