This allows the efifb driver to be built for ARM and arm64, and adds the
registration of a "efi-framebuffer" platform device if the GOP code in the
stub has populated screen_info appropriately.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
---
arch/arm/include/asm/efi.h | 4 ++++
arch/arm64/include/asm/efi.h | 4 ++++
drivers/firmware/efi/arm-init.c | 19 +++++++++++++++++++
drivers/video/fbdev/Kconfig | 2 +-
4 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/arch/arm/include/asm/efi.h b/arch/arm/include/asm/efi.h
index 6329b5be1eca..9b6d441b08fd 100644
--- a/arch/arm/include/asm/efi.h
+++ b/arch/arm/include/asm/efi.h
@@ -66,6 +66,10 @@ void efi_virtmap_unload(void);
struct screen_info *alloc_screen_info(efi_system_table_t *sys_table_arg);
void free_screen_info(efi_system_table_t *sys_table, struct screen_info *si);
+static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
+{
+}
+
/*
* This GUID is used to pass to the kernel proper the struct screen_info
* structure that was populated by the stub based on the GOP protocol instance
diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h
index a6c14f29b970..00e9d7099a8f 100644
--- a/arch/arm64/include/asm/efi.h
+++ b/arch/arm64/include/asm/efi.h
@@ -57,6 +57,10 @@ int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
#define alloc_screen_info(x...) &screen_info
#define free_screen_info(x...)
+static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
+{
+}
+
#define EFI_ALLOC_ALIGN SZ_64K
/*
diff --git a/drivers/firmware/efi/arm-init.c b/drivers/firmware/efi/arm-init.c
index 9e15d571b53c..eca9b4f826ee 100644
--- a/drivers/firmware/efi/arm-init.c
+++ b/drivers/firmware/efi/arm-init.c
@@ -17,6 +17,8 @@
#include <linux/mm_types.h>
#include <linux/of.h>
#include <linux/of_fdt.h>
+#include <linux/platform_device.h>
+#include <linux/screen_info.h>
#include <asm/efi.h>
@@ -206,4 +208,21 @@ void __init efi_init(void)
memblock_mark_nomap(params.mmap & PAGE_MASK,
PAGE_ALIGN(params.mmap_size +
(params.mmap & ~PAGE_MASK)));
+
+ if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI &&
+ memblock_is_map_memory(screen_info.lfb_base))
+ memblock_mark_nomap(screen_info.lfb_base, screen_info.lfb_size);
+}
+
+static int __init register_gop_device(void)
+{
+ void *pd;
+
+ if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
+ return 0;
+
+ /* the efifb driver accesses screen_info directly, no need to pass it */
+ pd = platform_device_register_simple("efi-framebuffer", 0, NULL, 0);
+ return PTR_ERR_OR_ZERO(pd);
}
+subsys_initcall(register_gop_device);
diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index 8ea45a5cd806..ccbaa25aad76 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig
@@ -761,7 +761,7 @@ config FB_VESA
config FB_EFI
bool "EFI-based Framebuffer Support"
- depends on (FB = y) && X86 && EFI
+ depends on (FB = y) && !IA64 && EFI
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
--
1.9.1
--
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