[PATCH] vesafb: Add blanking support

Add rudimentary support by manipulating the VGA registers.  However, not
all vesa modes are VGA compatible, so VGA compatiblity is checked first.
Only 2 levels are supported, powerup and powerdown.

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

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/i386/boot/video.S b/arch/i386/boot/video.S
index 0587477c99f2..02bf625a681b 100644
--- a/arch/i386/boot/video.S
+++ b/arch/i386/boot/video.S
@@ -97,6 +97,7 @@
 #define PARAM_VESAPM_OFF        0x30
 #define PARAM_LFB_PAGES         0x32
 #define PARAM_VESA_ATTRIB       0x34
+#define PARAM_CAPABILITIES      0x36
 
 /* Define DO_STORE according to CONFIG_VIDEO_RETAIN */
 #ifdef CONFIG_VIDEO_RETAIN
@@ -233,6 +234,10 @@ mopar_gr:
         movw    18(%di), %ax
         movl    %eax, %fs:(PARAM_LFB_SIZE)
 
+# store mode capabilities
+        movl    10(%di), %eax
+        movl    %eax, %fs:(PARAM_CAPABILITIES)
+
 # switching the DAC to 8-bit is for <= 8 bpp only
         movw    %fs:(PARAM_LFB_DEPTH), %ax
         cmpw    $8, %ax