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| author | Scot Doyle <lkml14@scotdoyle.com> | 2015-03-26 13:54:39 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-10 19:15:52 +0200 |
| commit | bd63364caa8df38bad2b25b11b2a1b849475cce5 (patch) | |
| tree | 738316f02af4692362da1d39f6a7917a60cc0dee /drivers/tty/vt | |
| parent | ad909b3f8b162a61ce9e32726dadb380e51f8949 (diff) | |
| download | linux-bd63364caa8df38bad2b25b11b2a1b849475cce5.tar.bz2 | |
vt: add cursor blink interval escape sequence
Add an escape sequence to specify the current console's cursor blink
interval. The interval is specified as a number of milliseconds until
the next cursor display state toggle, from 50 to 65535. /proc/loadavg
did not show a difference with a one msec interval, but the lower
bound is set to 50 msecs since slower hardware wasn't tested.
Store the interval in the vc_data structure for later access by fbcon,
initializing the value to fbcon's current hardcoded value of 200 msecs.
Signed-off-by: Scot Doyle <lkml14@scotdoyle.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/vt')
| -rw-r--r-- | drivers/tty/vt/vt.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 4a24eb2b0ede..b075489f314e 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -135,6 +135,7 @@ const struct consw *conswitchp; */ #define DEFAULT_BELL_PITCH 750 #define DEFAULT_BELL_DURATION (HZ/8) +#define DEFAULT_CURSOR_BLINK_MS 200 struct vc vc_cons [MAX_NR_CONSOLES]; @@ -1590,6 +1591,13 @@ static void setterm_command(struct vc_data *vc) case 15: /* activate the previous console */ set_console(last_console); break; + case 16: /* set cursor blink duration in msec */ + if (vc->vc_npar >= 1 && vc->vc_par[1] >= 50 && + vc->vc_par[1] <= USHRT_MAX) + vc->vc_cur_blink_ms = vc->vc_par[1]; + else + vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; + break; } } @@ -1717,6 +1725,7 @@ static void reset_terminal(struct vc_data *vc, int do_clear) vc->vc_bell_pitch = DEFAULT_BELL_PITCH; vc->vc_bell_duration = DEFAULT_BELL_DURATION; + vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; gotoxy(vc, 0, 0); save_cur(vc); |