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authorKrzysztof Helt <krzysztof.h1@wp.pl>2009-03-31 15:25:17 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-01 08:59:29 -0700
commit8636a9240cc93efa6b36f4cfe6253e0574f832c6 (patch)
tree6da421c57645ac1459bee8011bc42cd228849317 /drivers/video/cirrusfb.c
parent4242a23c9e6b8e2462bb49bf78b76bfdf32158b5 (diff)
cirrusfb: fix interlaced modes
Fix calculations of timings for interlaced modes. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/cirrusfb.c')
-rw-r--r--drivers/video/cirrusfb.c35
1 files changed, 21 insertions, 14 deletions
diff --git a/drivers/video/cirrusfb.c b/drivers/video/cirrusfb.c
index 9bb811d5672..d42e385f091 100644
--- a/drivers/video/cirrusfb.c
+++ b/drivers/video/cirrusfb.c
@@ -701,45 +701,52 @@ static int cirrusfb_set_par_foo(struct fb_info *info)
hsyncstart = var->xres + var->right_margin;
hsyncend = hsyncstart + var->hsync_len;
- htotal = (hsyncend + var->left_margin) / 8 - 5;
- hdispend = var->xres / 8 - 1;
- hsyncstart = hsyncstart / 8 + 1;
- hsyncend = hsyncend / 8 + 1;
+ htotal = (hsyncend + var->left_margin) / 8;
+ hdispend = var->xres / 8;
+ hsyncstart = hsyncstart / 8;
+ hsyncend = hsyncend / 8;
- yres = var->yres;
- vsyncstart = yres + var->lower_margin;
+ vdispend = var->yres;
+ vsyncstart = vdispend + var->lower_margin;
vsyncend = vsyncstart + var->vsync_len;
vtotal = vsyncend + var->upper_margin;
- vdispend = yres - 1;
if (var->vmode & FB_VMODE_DOUBLE) {
- yres *= 2;
+ vdispend *= 2;
vsyncstart *= 2;
vsyncend *= 2;
vtotal *= 2;
} else if (var->vmode & FB_VMODE_INTERLACED) {
- yres = (yres + 1) / 2;
+ vdispend = (vdispend + 1) / 2;
vsyncstart = (vsyncstart + 1) / 2;
vsyncend = (vsyncend + 1) / 2;
vtotal = (vtotal + 1) / 2;
}
-
- vtotal -= 2;
- vsyncstart -= 1;
- vsyncend -= 1;
-
+ yres = vdispend;
if (yres >= 1024) {
vtotal /= 2;
vsyncstart /= 2;
vsyncend /= 2;
vdispend /= 2;
}
+
+ vdispend -= 1;
+ vsyncstart -= 1;
+ vsyncend -= 1;
+ vtotal -= 2;
+
if (cinfo->multiplexing) {
htotal /= 2;
hsyncstart /= 2;
hsyncend /= 2;
hdispend /= 2;
}
+
+ htotal -= 5;
+ hdispend -= 1;
+ hsyncstart += 1;
+ hsyncend += 1;
+
/* unlock register VGA_CRTC_H_TOTAL..CRT7 */
vga_wcrt(regbase, VGA_CRTC_V_SYNC_END, 0x20); /* previously: 0x00) */