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authorAntonino A. Daplas <adaplas@gmail.com>2005-09-09 16:04:31 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-09 16:57:58 -0400
commitd2d58384fc5d4c0fe2d8e34bc2d15a90a9bb372a (patch)
tree6b28b34161e7ca2db38014b473690e9c9954779a /drivers/video/vesafb.c
parent7726e9e10fc6e026ed2dc00e48f4a3ffc1254ad2 (diff)
[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/video/vesafb.c')
-rw-r--r--drivers/video/vesafb.c38
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 @@
19#include <linux/fb.h> 19#include <linux/fb.h>
20#include <linux/ioport.h> 20#include <linux/ioport.h>
21#include <linux/init.h> 21#include <linux/init.h>
22#include <video/vga.h>
22#include <asm/io.h> 23#include <asm/io.h>
23#include <asm/mtrr.h> 24#include <asm/mtrr.h>
24 25
@@ -54,6 +55,7 @@ static unsigned short *pmi_base = NULL;
54static void (*pmi_start)(void); 55static void (*pmi_start)(void);
55static void (*pmi_pal)(void); 56static void (*pmi_pal)(void);
56static int depth; 57static int depth;
58static int vga_compat;
57 59
58/* --------------------------------------------------------------------- */ 60/* --------------------------------------------------------------------- */
59 61
@@ -86,6 +88,37 @@ static int vesafb_pan_display(struct fb_var_screeninfo *var,
86 return 0; 88 return 0;
87} 89}
88 90
91static int vesafb_blank(int blank, struct fb_info *info)
92{
93 int err = 1;
94
95 if (vga_compat) {
96 int loop = 10000;
97 u8 seq = 0, crtc17 = 0;
98
99 err = 0;
100
101 if (blank) {
102 seq = 0x20;
103 crtc17 = 0x00;
104 } else {
105 seq = 0x00;
106 crtc17 = 0x80;
107 }
108
109 vga_wseq(NULL, 0x00, 0x01);
110 seq |= vga_rseq(NULL, 0x01) & ~0x20;
111 vga_wseq(NULL, 0x00, seq);
112
113 crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80;
114 while (loop--);
115 vga_wcrt(NULL, 0x17, crtc17);
116 vga_wseq(NULL, 0x00, 0x03);
117 }
118
119 return err;
120}
121
89static void vesa_setpalette(int regno, unsigned red, unsigned green, 122static void vesa_setpalette(int regno, unsigned red, unsigned green,
90 unsigned blue) 123 unsigned blue)
91{ 124{
@@ -176,6 +209,7 @@ static struct fb_ops vesafb_ops = {
176 .owner = THIS_MODULE, 209 .owner = THIS_MODULE,
177 .fb_setcolreg = vesafb_setcolreg, 210 .fb_setcolreg = vesafb_setcolreg,
178 .fb_pan_display = vesafb_pan_display, 211 .fb_pan_display = vesafb_pan_display,
212 .fb_blank = vesafb_blank,
179 .fb_fillrect = cfb_fillrect, 213 .fb_fillrect = cfb_fillrect,
180 .fb_copyarea = cfb_copyarea, 214 .fb_copyarea = cfb_copyarea,
181 .fb_imageblit = cfb_imageblit, 215 .fb_imageblit = cfb_imageblit,
@@ -429,6 +463,10 @@ static int __init vesafb_probe(struct device *device)
429 info->flags = FBINFO_FLAG_DEFAULT | 463 info->flags = FBINFO_FLAG_DEFAULT |
430 (ypan) ? FBINFO_HWACCEL_YPAN : 0; 464 (ypan) ? FBINFO_HWACCEL_YPAN : 0;
431 465
466 vga_compat = (screen_info.capabilities & 2) ? 0 : 1;
467 printk("vesafb: Mode is %sVGA compatible\n",
468 (vga_compat) ? "" : "not ");
469
432 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { 470 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
433 err = -ENOMEM; 471 err = -ENOMEM;
434 goto err; 472 goto err;