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| author | Antonino A. Daplas <adaplas@gmail.com> | 2006-06-26 09:26:37 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-26 18:58:30 +0200 |
| commit | ba70710e59c701734aad524bc441b3400700e94b (patch) | |
| tree | b48dc0a2295ac3a1c76d60418c1ca0ddb02d99cc /arch/i386/boot | |
| parent | [PATCH] savagefb: Whitespace cleanup (diff) | |
| download | linux-ba70710e59c701734aad524bc441b3400700e94b.tar.xz linux-ba70710e59c701734aad524bc441b3400700e94b.zip | |
[PATCH] fbdev: Firmware EDID fixes
- make firmware edid independent from framebuffer (No need to choose
framebuffer just to disable this option
- enable this option in X86_64
- check if VBE/DDC function is implemented before calling actual function
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/boot')
| -rw-r--r-- | arch/i386/boot/video.S | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/arch/i386/boot/video.S b/arch/i386/boot/video.S index c9343c3a8082..8c2a6faeeae5 100644 --- a/arch/i386/boot/video.S +++ b/arch/i386/boot/video.S @@ -1929,7 +1929,7 @@ skip10: movb %ah, %al ret store_edid: -#ifdef CONFIG_FB_FIRMWARE_EDID +#ifdef CONFIG_FIRMWARE_EDID pushw %es # just save all registers pushw %ax pushw %bx @@ -1947,6 +1947,22 @@ store_edid: rep stosl + pushw %es # save ES + xorw %di, %di # Report Capability + pushw %di + popw %es # ES:DI must be 0:0 + movw $0x4f15, %ax + xorw %bx, %bx + xorw %cx, %cx + int $0x10 + popw %es # restore ES + + cmpb $0x00, %ah # call successful + jne no_edid + + cmpb $0x4f, %al # function supported + jne no_edid + movw $0x4f15, %ax # do VBE/DDC movw $0x01, %bx movw $0x00, %cx @@ -1954,6 +1970,7 @@ store_edid: movw $0x140, %di int $0x10 +no_edid: popw %di # restore all registers popw %dx popw %cx |