From: Bjorn Helgaas bhelgaas@google.com
On x86 and ia64, if a VGA device BARs include a framebuffer reported by platform firmware, we select the device as the default VGA device. Factor this code to a separate function. No functional change intended.
Signed-off-by: Bjorn Helgaas bhelgaas@google.com Cc: Bruno Prémont bonbons@linux-vserver.org --- drivers/gpu/vga/vgaarb.c | 99 +++++++++++++++++++++------------------- 1 file changed, 53 insertions(+), 46 deletions(-)
diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c index ef5ad4c432f5..36d9140c64f6 100644 --- a/drivers/gpu/vga/vgaarb.c +++ b/drivers/gpu/vga/vgaarb.c @@ -565,6 +565,58 @@ void vga_put(struct pci_dev *pdev, unsigned int rsrc) } EXPORT_SYMBOL(vga_put);
+static void __init vga_select_framebuffer_device(struct pci_dev *pdev) +{ +#if defined(CONFIG_X86) || defined(CONFIG_IA64) + struct device *dev = &pdev->dev; + u64 base = screen_info.lfb_base; + u64 size = screen_info.lfb_size; + u64 limit; + resource_size_t start, end; + unsigned long flags; + int i; + + /* Select the device owning the boot framebuffer if there is one */ + + if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) + base |= (u64)screen_info.ext_lfb_base << 32; + + limit = base + size; + + /* + * Override vga_arbiter_add_pci_device()'s I/O based detection + * as it may take the wrong device (e.g. on Apple system under + * EFI). + * + * Select the device owning the boot framebuffer if there is + * one. + */ + + /* Does firmware framebuffer belong to us? */ + for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { + flags = pci_resource_flags(pdev, i); + + if ((flags & IORESOURCE_MEM) == 0) + continue; + + start = pci_resource_start(pdev, i); + end = pci_resource_end(pdev, i); + + if (!start || !end) + continue; + + if (base < start || limit >= end) + continue; + + if (!vga_default_device()) + vgaarb_info(dev, "setting as boot device\n"); + else if (pdev != vga_default_device()) + vgaarb_info(dev, "overriding boot device\n"); + vga_set_default_device(pdev); + } +#endif +} + static bool vga_arb_integrated_gpu(struct device *dev) { #if defined(CONFIG_ACPI) @@ -1446,54 +1498,9 @@ static void __init vga_arb_select_default_device(void) struct pci_dev *pdev, *found = NULL; struct vga_device *vgadev;
-#if defined(CONFIG_X86) || defined(CONFIG_IA64) - u64 base = screen_info.lfb_base; - u64 size = screen_info.lfb_size; - u64 limit; - resource_size_t start, end; - unsigned long flags; - int i; - - if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) - base |= (u64)screen_info.ext_lfb_base << 32; - - limit = base + size; - list_for_each_entry(vgadev, &vga_list, list) { - struct device *dev = &vgadev->pdev->dev; - /* - * Override vga_arbiter_add_pci_device()'s I/O based detection - * as it may take the wrong device (e.g. on Apple system under - * EFI). - * - * Select the device owning the boot framebuffer if there is - * one. - */ - - /* Does firmware framebuffer belong to us? */ - for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { - flags = pci_resource_flags(vgadev->pdev, i); - - if ((flags & IORESOURCE_MEM) == 0) - continue; - - start = pci_resource_start(vgadev->pdev, i); - end = pci_resource_end(vgadev->pdev, i); - - if (!start || !end) - continue; - - if (base < start || limit >= end) - continue; - - if (!vga_default_device()) - vgaarb_info(dev, "setting as boot device\n"); - else if (vgadev->pdev != vga_default_device()) - vgaarb_info(dev, "overriding boot device\n"); - vga_set_default_device(vgadev->pdev); - } + vga_select_framebuffer_device(vgadev->pdev); } -#endif
if (!vga_default_device()) { list_for_each_entry_reverse(vgadev, &vga_list, list) {