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Subject[PATCH] fbcon: make cursor display conditional
Date
For embedded systems, the blinking cursor at startup time can be
annoying and unintended. Add a new kernel parameter
'fbcon_disable_cursor' which disables it conditionally. The default
behaviour is unchanged.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Andrea Righi <righi.andrea@gmail.com>
---
Documentation/kernel-parameters.txt | 3 +++
drivers/video/console/fbcon.c | 11 ++++++++++-
2 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 9107b38..80ac54e 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -743,6 +743,9 @@ and is between 256 and 4096 characters. It is defined in the file
Format: <interval>,<probability>,<space>,<times>
See also /Documentation/fault-injection/.

+ fbcon_disable_cursor
+ Disable the cursor in the framebuffer console
+
fd_mcs= [HW,SCSI]
See header of drivers/scsi/fd_mcs.c.

diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index 5a686ce..039aa86 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -116,6 +116,14 @@ static int fbcon_has_exited;
static int primary_device = -1;
static int fbcon_has_console_bind;

+static int fbcon_disable_cursor;
+static int __init _fbcon_disable_cursor(char *str)
+{
+ fbcon_disable_cursor = 1;
+ return 1;
+}
+__setup("fbcon_disable_cursor", _fbcon_disable_cursor);
+
#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
static int map_override;

@@ -1288,7 +1296,8 @@ static void fbcon_cursor(struct vc_data *vc, int mode)
int y;
int c = scr_readw((u16 *) vc->vc_pos);

- if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
+ if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1 ||
+ fbcon_disable_cursor)
return;

if (vc->vc_cursor_type & 0x10)
--
1.6.5


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