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authorAaron Ma <aaron.ma@canonical.com>2018-08-31 21:19:59 +0300
committerDaniel Vetter <daniel.vetter@ffwll.ch>2018-10-23 08:23:00 +0300
commita81c9ab678802075b7942c41cf640d9d9866d2db (patch)
treeec2640cba62d37833c7f6e418070b3344aa40cb0 /drivers/gpu/vga
parente51767279f11571b112dbeaef2628968c62f90a6 (diff)
downloadlinux-a81c9ab678802075b7942c41cf640d9d9866d2db.tar.xz
vgaarb: Add support for 64-bit frame buffer address
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.ma@canonical.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/1535739600-8842-1-git-send-email-aaron.ma@canonical.com
Diffstat (limited to 'drivers/gpu/vga')
-rw-r--r--drivers/gpu/vga/vgaarb.c19
1 files 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())