linux-kernel - [PATCH v2 9/9] efifb: enable the efi-framebuffer platform driver for ARM and arm64

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Date:	Fri, 18 Mar 2016 17:47:41 +0100
From:	Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:	linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, matt@...eblueprint.co.uk,
	catalin.marinas@....com, will.deacon@....com,
	linux@....linux.org.uk, pjones@...hat.com, dh.herrmann@...il.com
Cc:	leif.lindholm@...aro.org, mark.rutland@....com, x86@...nel.org,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>
Subject: [PATCH v2 9/9] efifb: enable the efi-framebuffer platform driver for ARM and arm64

Allows the efifb driver to be built for ARM and arm64. This simply involves
updating the Kconfig dependency expression, and supplying dummy versions of
efifb_setup_from_dmi().

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
---
 arch/arm/include/asm/efi.h   | 4 ++++
 arch/arm64/include/asm/efi.h | 4 ++++
 drivers/video/fbdev/Kconfig  | 2 +-
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/arm/include/asm/efi.h b/arch/arm/include/asm/efi.h
index be12877e8609..76ce7adde990 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)
+{
+}
+
 /*
  * A reasonable upper bound for the uncompressed kernel size is 32 MBytes,
  * so we will reserve that amount of memory. We have no easy way to tell what
diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h
index ed6c85d3a583..ec43456e3ef1 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/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index 983280e8d93f..e5a391aecde1 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
-- 
2.5.0