Re: scroll modes

["Antonino A. Daplas" <adaplas@gmail.com>]

Knut Petersen wrote:
> Hi Geert/Antonino,
> 
 > I have to admit that I´m not one of those gurus who fully understand the
> fbcon
> console layer in all details ... so please check that this does not
> break anything else.
> 

I think I see the problem.  Can you try this instead?

Tony

PS: Do you still need the previous patch?  The one that adjusts
p->vrows?

diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index eda237e..587b70e 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -727,13 +727,18 @@ fb_pan_display(struct fb_info *info, str
 {
         int xoffset = var->xoffset;
         int yoffset = var->yoffset;
-        int err;
+        int err, yres;
 
-        if (!info->fbops->fb_pan_display || xoffset < 0 || yoffset < 0 ||
-	    xoffset + info->var.xres > info->var.xres_virtual ||
-            yoffset + info->var.yres > info->var.yres_virtual)
-                return -EINVAL;
+	if (var->vmode & FB_VMODE_YWRAP)
+		yres = 0;
+	else
+		yres = info->var.yres;
 
+        if (!info->fbops->fb_pan_display || xoffset < 0 || yoffset < 0 ||
+	    var->yoffset + yres > info->var.yres_virtual ||
+	    var->xoffset + info->var.xres > info->var.xres_virtual)
+		return -EINVAL;
+	
 	if ((err = info->fbops->fb_pan_display(var, info)))
 		return err;
 


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