Blank now key

From: Pavel Machek (pavel@ucw.cz)
Date: Wed Aug 28 2002 - 17:16:45 EST

Hi!

Being able to "blank now" is very important for handheld devices
(where screen can eat more than 50% of total power), and it is just
nice everywhere else (also saves a little power). Please apply.

                                                                Pavel

--- clean/drivers/char/keyboard.c Wed Aug 28 22:38:44 2002
+++ linux/drivers/char/keyboard.c Wed Aug 28 23:03:43 2002
@@ -20,6 +20,7 @@
  * parts by Geert Uytterhoeven, May 1997
  *
  * 27-05-97: Added support for the Magic SysRq Key (Martin Mares)
+ * 29-07-97: Added blank console key (Pavel Machek)
  * 30-07-98: Dead keys redone, aeb@cwi.nl.
  * 21-08-02: Converted to input API, major cleanup. (Vojtech Pavlik)
  */
@@ -88,7 +89,8 @@
         fn_show_state, fn_send_intr, fn_lastcons, fn_caps_toggle,\
         fn_num, fn_hold, fn_scroll_forw, fn_scroll_back,\
         fn_boot_it, fn_caps_on, fn_compose, fn_SAK,\
- fn_dec_console, fn_inc_console, fn_spawn_con, fn_bare_num
+ fn_dec_console, fn_inc_console, fn_spawn_con, fn_bare_num, \
+ fn_blank_now
 
 typedef void (fn_handler_fn)(struct vc_data *vc);
 static fn_handler_fn FN_HANDLERS;
@@ -310,6 +312,25 @@
         con_schedule_flip(tty);
 }
 
+static void blank_now_do(unsigned long unused)
+{
+ do_poke_blanked_console = 0;
+ do_blank_screen(0);
+}
+
+static struct timer_list blank_now_timer;
+
+static void fn_blank_now(struct vc_data *vc)
+{
+ /* You ask why we have our own timer here? Well, it is because
+ we do not want user's release of keys to unblank
+ immediately. Even if we correctly guessed what is press and
+ what is release, thinkpad's broken bios will turn on
+ backlight for us... <pavel@ucw.cz> */
+ blank_now_timer.expires = jiffies + HZ;
+ add_timer(&blank_now_timer);
+}
+
 static void applkey(struct vc_data *vc, int key, char mode)
 {
         static char buf[] = { 0x1b, 'O', 0x00, 0x00 };
@@ -1169,6 +1209,9 @@
 int __init kbd_init(void)
 {
         int i;
+
+ init_timer(&blank_now_timer);
+ blank_now_timer.function = blank_now_do;
 
         kbd0.ledflagstate = kbd0.default_ledflagstate = KBD_DEFLEDS;
         kbd0.ledmode = LED_SHOW_FLAGS; 

-- 
Worst form of spam? Adding advertisment signatures ala sourceforge.net.
What goes next? Inserting advertisment *into* email?
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

This archive was generated by hypermail 2b29 : Sat Aug 31 2002 - 22:00:24 EST