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authorAntonino A. Daplas <adaplas@gmail.com>2005-09-10 00:04:31 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-10 00:57:58 +0400
commitd2d58384fc5d4c0fe2d8e34bc2d15a90a9bb372a (patch)
tree6b28b34161e7ca2db38014b473690e9c9954779a /arch/i386/boot/video.S
parent7726e9e10fc6e026ed2dc00e48f4a3ffc1254ad2 (diff)
downloadlinux-d2d58384fc5d4c0fe2d8e34bc2d15a90a9bb372a.tar.xz
[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>
Diffstat (limited to 'arch/i386/boot/video.S')
-rw-r--r--arch/i386/boot/video.S5
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