Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | Date | Thu, 27 Mar 2003 23:33:56 +0100 | From | Pavel Machek <> | Subject | Blank now key |
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Hi!
This is must-have for machines where backlight eats significant ammount of power. Please apply, Pavel
Index: linux/drivers/char/keyboard.c =================================================================== --- linux.orig/drivers/char/keyboard.c 2003-03-27 11:10:04.000000000 +0100 +++ linux/drivers/char/keyboard.c 2003-03-16 18:51:05.000000000 +0100 @@ -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) */ @@ -86,7 +87,8 @@ 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, struct pt_regs *regs); static fn_handler_fn FN_HANDLERS; @@ -320,6 +322,25 @@ 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, struct pt_regs *regs) +{ + /* 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 }; @@ -1215,6 +1258,9 @@ { 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; kbd0.lockstate = KBD_DEFLOCK;
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