Messages in this thread Patch in this message | | | Date | Sat, 7 Jun 2003 22:45:23 +0200 | From | Pavel Machek <> | Subject | Re: Console blanking: blank on demand |
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Hi!
> > [I seen you did some changes to screen blanking...] > > > > For pretty long time this is in my tree. It is pretty important for > > small machines where display takes as much power as rest of system... > > > > What about applying? > > - What key is it using?
Whatever you map it to, but to map it you need (one-line) loadkeys support.
> - Is there somewhere under Documentation/ where the key should be > documented?
I guess right approach is add patch to loadkeys adding BlankNow key, then adding it to some obscure place in default keymap.
> - whitespace looks suspect.
Well, whitespace is wrong in kbd_init() [it uses 8 spaces, not a tab]. I reindented it in this version...
> - The timer is left running across rmmod.
I do not think keyboard.c can be unloaded. There's input_register_handler but no input_unregister_handler.
Pavel
%patch Index: linux/drivers/char/keyboard.c =================================================================== --- linux.orig/drivers/char/keyboard.c 2003-06-01 20:12:16.000000000 +0200 +++ linux/drivers/char/keyboard.c 2003-06-07 22:14:22.000000000 +0200 @@ -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 }; @@ -1215,15 +1258,18 @@ { int i; - kbd0.ledflagstate = kbd0.default_ledflagstate = KBD_DEFLEDS; - kbd0.ledmode = LED_SHOW_FLAGS; - kbd0.lockstate = KBD_DEFLOCK; - kbd0.slockstate = 0; - kbd0.modeflags = KBD_DEFMODE; - kbd0.kbdmode = VC_XLATE; + 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; + kbd0.slockstate = 0; + kbd0.modeflags = KBD_DEFMODE; + kbd0.kbdmode = VC_XLATE; - for (i = 0 ; i < MAX_NR_CONSOLES ; i++) - kbd_table[i] = kbd0; + for (i = 0 ; i < MAX_NR_CONSOLES ; i++) + kbd_table[i] = kbd0; input_register_handler(&kbd_handler); %diffstat keyboard.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++--------- 1 files changed, 55 insertions(+), 9 deletions(-)
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