[PATCH] fbdev: Resurrect hooks to get EDID from firmware

For the i386, code is already present in video.S that gets the EDID from the
video BIOS.  Make this visible so drivers can also use this data as fallback
when i2c does not work.

To ensure that the EDID block is returned for the primary graphics adapter
only, by check if the IORESOURCE_ROM_SHADOW flag is set.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 2 insertions, 1 deletions

diff --git a/arch/i386/boot/video.S b/arch/i386/boot/video.S
index 02bf625a681b..92f669470142 100644
--- a/arch/i386/boot/video.S
+++ b/arch/i386/boot/video.S
@@ -1949,7 +1949,7 @@ store_edid:
         movw    $0x4f15, %ax                    # do VBE/DDC
         movw    $0x01, %bx
         movw    $0x00, %cx
-        movw    $0x01, %dx
+        movw    $0x00, %dx
         movw    $0x140, %di
         int     $0x10
 
diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
index a659d274914c..fa0c69eb937a 100644
--- a/arch/i386/kernel/setup.c
+++ b/arch/i386/kernel/setup.c
@@ -139,6 +139,7 @@ struct sys_desc_table_struct {
         unsigned char table[0];
 };
 struct edid_info edid_info;
+EXPORT_SYMBOL_GPL(edid_info);
 struct ist_info ist_info;
 #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
         defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)