EFI GOP uses 64-bit frame buffer address when some BIOS
disabled CSM support. vgaarb only stores lfb_base,
this will lead boot framebuffer to wrong device.
Add ext_lfb_base support to use 64-bit fb address.
Signed-off-by: Aaron Ma <aaron...@canonical.com>
---
drivers/gpu/vga/vgaarb.c | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c
index c61b04555779..8d90e66994b0 100644
--- a/drivers/gpu/vga/vgaarb.c
+++ b/drivers/gpu/vga/vgaarb.c
@@ -1408,6 +1408,18 @@ static void __init vga_arb_select_default_device(void)
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;
/*
@@ -1418,11 +1430,6 @@ static void __init vga_arb_select_default_device(void)
* Select the device owning the boot framebuffer if there is
* one.
*/
- resource_size_t start, end, limit;
- unsigned long flags;
- int i;
-
- limit = screen_info.lfb_base + screen_info.lfb_size;
/* Does firmware framebuffer belong to us? */
for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
@@ -1437,7 +1444,7 @@ static void __init vga_arb_select_default_device(void)
if (!start || !end)
continue;
- if (screen_info.lfb_base < start || limit >= end)
+ if (base < start || limit >= end)
continue;
if (!vga_default_device())
--
2.17.1
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