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Date: Fri, 13 Nov 2009 14:57:01 -0500
From: Matthew Garrett <mjg@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: hpa@...or.com, gregkh@...e.de, Matthew Garrett <mjg@...hat.com>
Subject: [PATCH 2/3] vc: Add support for hiding the cursor when creating VTs
Add support for setting a global default for whether or not a visible
cursor should be enabled when creating VCs. The default will be to do so,
unless overridden by the user at boot time or by a driver.
Signed-off-by: Matthew Garrett <mjg@...hat.com>
---
Documentation/kernel-parameters.txt | 9 +++++++++
drivers/char/vt.c | 22 ++++++++++++++++------
drivers/video/console/vgacon.c | 2 ++
include/linux/vt_kern.h | 3 +++
4 files changed, 30 insertions(+), 6 deletions(-)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 9107b38..dd42eb6 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2729,6 +2729,15 @@ and is between 256 and 4096 characters. It is defined in the file
Default is 1, i.e. UTF-8 mode is enabled for all
newly opened terminals.
+ vt.global_cursor_default=
+ [VT]
+ Format=<-1|0|1>
+ Set system-wide default for whether a cursor
+ is shown on new VTs. Default is -1,
+ i.e. cursors will be created by default unless
+ overridden by individual drivers. 0 will hide
+ cursors, 1 will display them.
+
waveartist= [HW,OSS]
Format: <io>,<irq>,<dma>,<dma2>
diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 0c80c68..eccd532 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -146,10 +146,11 @@ static const struct consw *con_driver_map[MAX_NR_CONSOLES];
static int con_open(struct tty_struct *, struct file *);
static void vc_init(struct vc_data *vc, unsigned int rows,
- unsigned int cols, int do_clear);
+ unsigned int cols, int do_clear)
static void gotoxy(struct vc_data *vc, int new_x, int new_y);
static void save_cur(struct vc_data *vc);
-static void reset_terminal(struct vc_data *vc, int do_clear);
+static void reset_terminal(struct vc_data *vc, int do_clear,
+ int show_cursor);
static void con_flush_chars(struct tty_struct *tty);
static int set_vesa_blanking(char __user *p);
static void set_cursor(struct vc_data *vc);
@@ -161,6 +162,8 @@ static void set_palette(struct vc_data *vc);
static int printable; /* Is console ready for printing? */
int default_utf8 = true;
module_param(default_utf8, int, S_IRUGO | S_IWUSR);
+static int global_cursor_default = -1;
+module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
/*
* ignore_poke: don't unblank the screen when things are typed. This is
@@ -775,6 +778,12 @@ int vc_allocate(unsigned int currcons) /* return 0 on success */
vc_cons[currcons].d = NULL;
return -ENOMEM;
}
+
+ /* If no drivers have overridden us and the user didn't pass a
+ boot option, default to displaying the cursor */
+ if (global_cursor_default == -1)
+ global_cursor_default = 1;
+
vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
vcs_make_sysfs(currcons);
atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m);
@@ -1616,7 +1625,7 @@ static void reset_terminal(struct vc_data *vc, int do_clear)
vc->vc_decscnm = 0;
vc->vc_decom = 0;
vc->vc_decawm = 1;
- vc->vc_deccm = 1;
+ vc->vc_deccm = global_cursor_default;
vc->vc_decim = 0;
set_kbd(vc, decarm);
@@ -1756,7 +1765,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
vc->vc_state = EShash;
return;
case 'c':
- reset_terminal(vc, 1);
+ reset_terminal(vc, 1, 1);
return;
case '>': /* Numeric keypad */
clr_kbd(vc, kbdapplic);
@@ -2821,7 +2830,7 @@ static void vc_init(struct vc_data *vc, unsigned int rows,
vc->vc_itcolor = default_italic_color;
vc->vc_halfcolor = 0x08; /* grey */
init_waitqueue_head(&vc->paste_wait);
- reset_terminal(vc, do_clear);
+ reset_terminal(vc, do_clear, show_cursor);
}
/*
@@ -2873,7 +2882,7 @@ static int __init con_init(void)
visual_init(vc, currcons, 1);
vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
vc_init(vc, vc->vc_rows, vc->vc_cols,
- currcons || !vc->vc_sw->con_save_screen);
+ currcons || !vc->vc_sw->con_save_screen)
}
currcons = fg_console = 0;
master_display_fg = vc = vc_cons[currcons].d;
@@ -4078,6 +4087,7 @@ EXPORT_SYMBOL(fg_console);
EXPORT_SYMBOL(console_blank_hook);
EXPORT_SYMBOL(console_blanked);
EXPORT_SYMBOL(vc_cons);
+EXPORT_SYMBOL(global_cursor_default);
#ifndef VT_SINGLE_DRIVER
EXPORT_SYMBOL(take_over_console);
EXPORT_SYMBOL(give_up_console);
diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c
index da55cca..564643e 100644
--- a/drivers/video/console/vgacon.c
+++ b/drivers/video/console/vgacon.c
@@ -585,6 +585,8 @@ static void vgacon_init(struct vc_data *c, int init)
vgacon_uni_pagedir[1]++;
if (!vgacon_uni_pagedir[0] && p)
con_set_default_unimap(c);
+
+ hide_boot_cursor(screen_info.flags & VIDEO_FLAGS_NOCURSOR);
}
static void vgacon_deinit(struct vc_data *c)
diff --git a/include/linux/vt_kern.h b/include/linux/vt_kern.h
index c0c4e11..7f56db4 100644
--- a/include/linux/vt_kern.h
+++ b/include/linux/vt_kern.h
@@ -110,6 +110,7 @@ extern char con_buf[CON_BUF_SIZE];
extern struct mutex con_buf_mtx;
extern char vt_dont_switch;
extern int default_utf8;
+extern int global_cursor_default;
struct vt_spawn_console {
spinlock_t lock;
@@ -130,4 +131,6 @@ struct vt_notifier_param {
extern int register_vt_notifier(struct notifier_block *nb);
extern int unregister_vt_notifier(struct notifier_block *nb);
+extern void hide_boot_cursor(bool hide);
+
#endif /* _VT_KERN_H */
--
1.6.5.2
--
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