Messages in this thread Patch in this message |  | | Date | Thu, 29 Aug 2002 00:16:45 +0200 | From | Pavel Machek <> | Subject | Blank now key |
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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/
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