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| author | Antonino A. Daplas <adaplas@gmail.com> | 2005-09-09 13:04:31 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-09 13:57:58 -0700 |
| commit | d2d58384fc5d4c0fe2d8e34bc2d15a90a9bb372a (patch) | |
| tree | 6b28b34161e7ca2db38014b473690e9c9954779a /drivers | |
| parent | 7726e9e10fc6e026ed2dc00e48f4a3ffc1254ad2 (diff) | |
| download | linux-d2d58384fc5d4c0fe2d8e34bc2d15a90a9bb372a.tar.gz linux-d2d58384fc5d4c0fe2d8e34bc2d15a90a9bb372a.tar.bz2 linux-d2d58384fc5d4c0fe2d8e34bc2d15a90a9bb372a.zip | |
[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 'drivers')
| -rw-r--r-- | drivers/video/vesafb.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/video/vesafb.c b/drivers/video/vesafb.c index a272592b0373..1ca80264c7b0 100644 --- a/drivers/video/vesafb.c +++ b/drivers/video/vesafb.c @@ -19,6 +19,7 @@ #include <linux/fb.h> #include <linux/ioport.h> #include <linux/init.h> +#include <video/vga.h> #include <asm/io.h> #include <asm/mtrr.h> @@ -54,6 +55,7 @@ static unsigned short *pmi_base = NULL; static void (*pmi_start)(void); static void (*pmi_pal)(void); static int depth; +static int vga_compat; /* --------------------------------------------------------------------- */ @@ -86,6 +88,37 @@ static int vesafb_pan_display(struct fb_var_screeninfo *var, return 0; } +static int vesafb_blank(int blank, struct fb_info *info) +{ + int err = 1; + + if (vga_compat) { + int loop = 10000; + u8 seq = 0, crtc17 = 0; + + err = 0; + + if (blank) { + seq = 0x20; + crtc17 = 0x00; + } else { + seq = 0x00; + crtc17 = 0x80; + } + + vga_wseq(NULL, 0x00, 0x01); + seq |= vga_rseq(NULL, 0x01) & ~0x20; + vga_wseq(NULL, 0x00, seq); + + crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80; + while (loop--); + vga_wcrt(NULL, 0x17, crtc17); + vga_wseq(NULL, 0x00, 0x03); + } + + return err; +} + static void vesa_setpalette(int regno, unsigned red, unsigned green, unsigned blue) { @@ -176,6 +209,7 @@ static struct fb_ops vesafb_ops = { .owner = THIS_MODULE, .fb_setcolreg = vesafb_setcolreg, .fb_pan_display = vesafb_pan_display, + .fb_blank = vesafb_blank, .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, .fb_imageblit = cfb_imageblit, @@ -429,6 +463,10 @@ static int __init vesafb_probe(struct device *device) info->flags = FBINFO_FLAG_DEFAULT | (ypan) ? FBINFO_HWACCEL_YPAN : 0; + vga_compat = (screen_info.capabilities & 2) ? 0 : 1; + printk("vesafb: Mode is %sVGA compatible\n", + (vga_compat) ? "" : "not "); + if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { err = -ENOMEM; goto err; |