From: Knut Petersen <Knut_Petersen@t-online.de>
To: "Antonino A. Daplas" <adaplas@gmail.com>
Cc: linux-fbdev-devel@lists.sourceforge.net
Subject: [PATCH 1/1: 2.6.15-rc6] Fix clearing of vertical margins
Date: Tue, 20 Dec 2005 11:06:43 +0100 [thread overview]
Message-ID: <43A7D7B3.6000907@t-online.de> (raw)
Whenever the font width does not divide the x resolution, the remainder
of this division is a vertical margin at right of the screen. Whatever the
video memory contains in that margin is displayed.
This patch corrects this behaviour. There is no performance impact
as long as there is no vertical margin as fbcon_clear_margins() and
bit_clear_margins() only execute additional code if really necessary.
I think this patch should be applied before 2.6.15-final.
Signed-off-by: Knut Petersen <Knut_Petersen@t-online.de>
diff -uprN -X linux/Documentation/dontdiff -x '*.bak' -x '*.ctx' linuxorig/drivers/video/console/fbcon.c linux/drivers/video/console/fbcon.c
--- linuxorig/drivers/video/console/fbcon.c 2005-12-15 10:34:42.000000000 +0100
+++ linux/drivers/video/console/fbcon.c 2005-12-20 09:41:32.000000000 +0100
@@ -1399,7 +1399,7 @@ static __inline__ void ypan_up(struct vc
ops->var.yoffset = p->yscroll * vc->vc_font.height;
ops->var.vmode &= ~FB_VMODE_YWRAP;
ops->update_start(info);
- fbcon_clear_margins(vc, 1);
+ fbcon_clear_margins(vc, 0);
scrollback_max += count;
if (scrollback_max > scrollback_phys_max)
scrollback_max = scrollback_phys_max;
@@ -1426,7 +1426,7 @@ static __inline__ void ypan_up_redraw(st
ops->var.yoffset = p->yscroll * vc->vc_font.height;
ops->var.vmode &= ~FB_VMODE_YWRAP;
ops->update_start(info);
- fbcon_clear_margins(vc, 1);
+ fbcon_clear_margins(vc, 0);
scrollback_max += count;
if (scrollback_max > scrollback_phys_max)
scrollback_max = scrollback_phys_max;
@@ -1450,7 +1450,7 @@ static __inline__ void ypan_down(struct
ops->var.yoffset = p->yscroll * vc->vc_font.height;
ops->var.vmode &= ~FB_VMODE_YWRAP;
ops->update_start(info);
- fbcon_clear_margins(vc, 1);
+ fbcon_clear_margins(vc, 0);
scrollback_max -= count;
if (scrollback_max < 0)
scrollback_max = 0;
@@ -1477,7 +1477,7 @@ static __inline__ void ypan_down_redraw(
ops->var.yoffset = p->yscroll * vc->vc_font.height;
ops->var.vmode &= ~FB_VMODE_YWRAP;
ops->update_start(info);
- fbcon_clear_margins(vc, 1);
+ fbcon_clear_margins(vc, 0);
scrollback_max -= count;
if (scrollback_max < 0)
scrollback_max = 0;
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next reply other threads:[~2005-12-20 10:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-20 10:06 Knut Petersen [this message]
2005-12-20 12:02 ` [PATCH 1/1: 2.6.15-rc6] Fix clearing of vertical margins Antonino A. Daplas
2005-12-21 5:48 ` Knut Petersen
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