/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2002 by Linus Nielsen Feltzing * Additional work by Martin Ritter (2007) and Thomas Martitz (2008) * for backlight thread fading * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include "config.h" #include #include "cpu.h" #include "kernel.h" #include "thread.h" #include "i2c.h" #include "debug.h" #include "rtc.h" #include "usb.h" #include "power.h" #include "system.h" #include "button.h" #include "timer.h" #include "backlight.h" #include "lcd.h" #ifdef HAVE_REMOTE_LCD #include "lcd-remote.h" #endif #ifndef SIMULATOR #include "backlight-target.h" #endif #if !defined(BOOTLOADER) /* The whole driver should be built */ #define BACKLIGHT_FULL_INIT #endif #ifdef HAVE_BACKLIGHT_BRIGHTNESS int backlight_brightness = DEFAULT_BRIGHTNESS_SETTING; #endif #ifdef USE_BACKLIGHT_SW_FADING #include "backlight-thread-fading.h" #endif #ifdef SIMULATOR /* TODO: find a better way to do it but we need a kernel thread somewhere to handle this */ extern void screen_dump(void); static inline void _backlight_on(void) { sim_backlight(100); } static inline void _backlight_off(void) { sim_backlight(0); } static inline void _backlight_set_brightness(int val) { (void)val; } static inline void _buttonlight_on(void) { } static inline void _buttonlight_off(void) { } static inline void _buttonlight_set_brightness(int val) { (void)val; } #ifdef HAVE_REMOTE_LCD static inline void _remote_backlight_on(void) { sim_remote_backlight(100); } static inline void _remote_backlight_off(void) { sim_remote_backlight(0); } #endif /* HAVE_REMOTE_LCD */ #endif /* SIMULATOR */ #if defined(HAVE_BACKLIGHT) && defined(BACKLIGHT_FULL_INIT) enum { BACKLIGHT_ON, BACKLIGHT_OFF, #ifdef HAVE_REMOTE_LCD REMOTE_BACKLIGHT_ON, REMOTE_BACKLIGHT_OFF, #endif #if defined(_BACKLIGHT_FADE_BOOST) || defined(_BACKLIGHT_FADE_ENABLE) BACKLIGHT_FADE_FINISH, #endif #ifdef HAVE_LCD_SLEEP LCD_SLEEP, #endif #ifdef HAVE_BUTTON_LIGHT BUTTON_LIGHT_ON, BUTTON_LIGHT_OFF, #endif #ifdef BACKLIGHT_DRIVER_CLOSE BACKLIGHT_QUIT, #endif }; static void backlight_thread(void); static long backlight_stack[DEFAULT_STACK_SIZE/sizeof(long)]; static const char backlight_thread_name[] = "backlight"; static struct event_queue backlight_queue; #ifdef BACKLIGHT_DRIVER_CLOSE static unsigned int backlight_thread_id = 0; #endif static int backlight_timer SHAREDBSS_ATTR; static int backlight_timeout SHAREDBSS_ATTR; static int backlight_timeout_normal = 5*HZ; #if CONFIG_CHARGING static int backlight_timeout_plugged = 5*HZ; #endif #ifdef HAS_BUTTON_HOLD static int backlight_on_button_hold = 0; #endif #ifdef HAVE_BUTTON_LIGHT static int buttonlight_timer; int _buttonlight_timeout = 5*HZ; /* Update state of buttonlight according to timeout setting */ static void buttonlight_update_state(void) { buttonlight_timer = _buttonlight_timeout; /* Buttonlight == OFF in the setting? */ if (buttonlight_timer < 0) { buttonlight_timer = 0; /* Disable the timeout */ _buttonlight_off(); } else _buttonlight_on(); } /* external interface */ void buttonlight_on(void) { queue_remove_from_head(&backlight_queue, BUTTON_LIGHT_ON); queue_post(&backlight_queue, BUTTON_LIGHT_ON, 0); } void buttonlight_off(void) { queue_post(&backlight_queue, BUTTON_LIGHT_OFF, 0); } void buttonlight_set_timeout(int value) { _buttonlight_timeout = HZ * value; buttonlight_update_state(); } #endif /* HAVE_BUTTON_LIGHT */ #ifdef HAVE_REMOTE_LCD static int remote_backlight_timer; static int remote_backlight_timeout; static int remote_backlight_timeout_normal = 5*HZ; #if CONFIG_CHARGING static int remote_backlight_timeout_plugged = 5*HZ; #endif #ifdef HAS_REMOTE_BUTTON_HOLD static int remote_backlight_on_button_hold = 0; #endif #endif /* HAVE_REMOTE_LCD */ #ifdef HAVE_LCD_SLEEP #ifdef HAVE_LCD_SLEEP_SETTING const signed char lcd_sleep_timeout_value[10] = { -1, 0, 5, 10, 15, 20, 30, 45, 60, 90 }; static int lcd_sleep_timeout = 10*HZ; #else /* Target defines needed value */ static const int lcd_sleep_timeout = LCD_SLEEP_TIMEOUT; #endif static int lcd_sleep_timer = 0; void backlight_lcd_sleep_countdown(bool start) { if (!start) { /* Cancel the LCD sleep countdown */ lcd_sleep_timer = 0; return; } /* Start LCD sleep countdown */ if (lcd_sleep_timeout < 0) { lcd_sleep_timer = 0; /* Setting == Always */ lcd_sleep(); } else { lcd_sleep_timer = lcd_sleep_timeout; } } #endif /* HAVE_LCD_SLEEP */ #ifdef USE_BACKLIGHT_SW_FADING static int backlight_fading_type = (FADING_UP|FADING_DOWN); static int backlight_fading_state = NOT_FADING; #endif #if defined(HAVE_BACKLIGHT_PWM_FADING) && !defined(SIMULATOR) /* backlight fading */ #define BL_PWM_INTERVAL 5 /* Cycle interval in ms */ #define BL_PWM_BITS 8 #define BL_PWM_COUNT (1<> 16; if (bl_dim_current > 0 && bl_dim_current < BL_PWM_COUNT) { _backlight_on_isr(); timer_period = (timer_period * bl_dim_current) >> BL_PWM_BITS; bl_dim_state = DIM_STATE_MAIN; } else { if (bl_dim_current) _backlight_on_isr(); else _backlight_off_isr(); if (bl_dim_current == bl_dim_target) idle = true; } if (bl_dim_current < bl_dim_target) { bl_dim_fraction = MIN(bl_dim_fraction + bl_fade_in_step, (BL_PWM_COUNT<<16)); } else if (bl_dim_current > bl_dim_target) { bl_dim_fraction = MAX(bl_dim_fraction - bl_fade_out_step, 0); } break; /* Dim main screen */ case DIM_STATE_MAIN: _backlight_off_isr(); timer_period = (timer_period * (BL_PWM_COUNT - bl_dim_current)) >> BL_PWM_BITS; bl_dim_state = DIM_STATE_START; break ; } if (idle) { #if defined(_BACKLIGHT_FADE_BOOST) || defined(_BACKLIGHT_FADE_ENABLE) queue_post(&backlight_queue, BACKLIGHT_FADE_FINISH, 0); #endif timer_unregister(); bl_timer_active = false; } else timer_set_period(timer_period); } static void backlight_switch(void) { if (bl_dim_target > (BL_PWM_COUNT/2)) { _backlight_on_normal(); bl_dim_fraction = (BL_PWM_COUNT<<16); } else { _backlight_off_normal(); bl_dim_fraction = 0; } } static void backlight_release_timer(void) { #ifdef _BACKLIGHT_FADE_BOOST cpu_boost(false); #endif timer_unregister(); bl_timer_active = false; backlight_switch(); } static void backlight_dim(int value) { /* protect from extraneous calls with the same target value */ if (value == bl_dim_target) return; bl_dim_target = value; if (bl_timer_active) return ; if (timer_register(0, backlight_release_timer, 2, 0, backlight_isr IF_COP(, CPU))) { #ifdef _BACKLIGHT_FADE_BOOST /* Prevent cpu frequency changes while dimming. */ cpu_boost(true); #endif bl_timer_active = true; } else backlight_switch(); } static void _backlight_on(void) { #ifdef HAVE_LCD_SLEEP backlight_lcd_sleep_countdown(false); #endif if (bl_fade_in_step > 0) { #ifdef _BACKLIGHT_FADE_ENABLE _backlight_hw_enable(true); #endif backlight_dim(BL_PWM_COUNT); } else { bl_dim_target = BL_PWM_COUNT; bl_dim_fraction = (BL_PWM_COUNT<<16); _backlight_on_normal(); } } static void _backlight_off(void) { if (bl_fade_out_step > 0) { backlight_dim(0); } else { bl_dim_target = bl_dim_fraction = 0; _backlight_off_normal(); } #ifdef HAVE_LCD_SLEEP backlight_lcd_sleep_countdown(true); #endif } void backlight_set_fade_in(int value) { if (value > 0) bl_fade_in_step = ((BL_PWM_INTERVAL*BL_PWM_COUNT)<<16) / value; else bl_fade_in_step = 0; } void backlight_set_fade_out(int value) { if (value > 0) bl_fade_out_step = ((BL_PWM_INTERVAL*BL_PWM_COUNT)<<16) / value; else bl_fade_out_step = 0; } #endif /* defined(HAVE_BACKLIGHT_PWM_FADING) && !defined(SIMULATOR) */ #ifdef USE_BACKLIGHT_SW_FADING void backlight_set_fade_out(bool value) { if(value) /* on */ backlight_fading_type |= FADING_DOWN; else backlight_fading_type &= FADING_UP; } void backlight_set_fade_in(bool value) { if(value) /* on */ backlight_fading_type |= FADING_UP; else backlight_fading_type &= FADING_DOWN; } static void backlight_set_up_fade_up(void) { if (backlight_fading_type & FADING_UP) { if (backlight_fading_state == NOT_FADING) { /* make sure the backlight is at lowest level */ _backlight_on(); } backlight_fading_state = FADING_UP; } else { backlight_fading_state = NOT_FADING; _backlight_fade_update_state(backlight_brightness); _backlight_on(); _backlight_set_brightness(backlight_brightness); } } static void backlight_set_up_fade_down(void) { if (backlight_fading_type & FADING_DOWN) { backlight_fading_state = FADING_DOWN; } else { backlight_fading_state = NOT_FADING; _backlight_fade_update_state(MIN_BRIGHTNESS_SETTING-1); _backlight_off(); /* h300/x5/d2 go to the last known brightness level at backight_on(),which * should be the lowest level to keep fading up glitch free * targets which set brightness over AS3514 I2C make the backlight on only * by setting the brightness, so this step would be noticeable */ #if !defined(HAVE_AS3514) _backlight_set_brightness(MIN_BRIGHTNESS_SETTING); #endif } } #endif /* USE_BACKLIGHT_SW_FADING */ /* Update state of backlight according to timeout setting */ static void backlight_update_state(void) { #ifdef HAS_BUTTON_HOLD if ((backlight_on_button_hold != 0) #ifdef HAVE_REMOTE_LCD_AS_MAIN && remote_button_hold() #else && button_hold() #endif ) backlight_timeout = (backlight_on_button_hold == 2) ? 0 : -1; /* always on or always off */ else #endif #if CONFIG_CHARGING if (power_input_present()) backlight_timeout = backlight_timeout_plugged; else #endif backlight_timeout = backlight_timeout_normal; /* Backlight == OFF in the setting? */ if (UNLIKELY(backlight_timeout < 0)) { backlight_timer = 0; /* Disable the timeout */ #ifdef USE_BACKLIGHT_SW_FADING backlight_set_up_fade_down(); /* necessary step to issue fading down when the setting is selected */ queue_post(&backlight_queue, SYS_TIMEOUT, 0); #else _backlight_off(); #endif } else { backlight_timer = backlight_timeout; #if defined(USE_BACKLIGHT_SW_FADING) backlight_set_up_fade_up(); #else _backlight_on(); #endif } } #ifdef HAVE_REMOTE_LCD /* Update state of remote backlight according to timeout setting */ static void remote_backlight_update_state(void) { #ifdef HAS_REMOTE_BUTTON_HOLD if (remote_button_hold() && (remote_backlight_on_button_hold != 0)) remote_backlight_timeout = (remote_backlight_on_button_hold == 2) ? 0 : -1; /* always on or always off */ else #endif #if CONFIG_CHARGING if (power_input_present()) remote_backlight_timeout = remote_backlight_timeout_plugged; else #endif remote_backlight_timeout = remote_backlight_timeout_normal; /* Backlight == OFF in the setting? */ if (remote_backlight_timeout < 0) { remote_backlight_timer = 0; /* Disable the timeout */ _remote_backlight_off(); } else { remote_backlight_timer = remote_backlight_timeout; _remote_backlight_on(); } } #endif /* HAVE_REMOTE_LCD */ void backlight_thread(void) { struct queue_event ev; bool locked = false; while(1) { #if defined(USE_BACKLIGHT_SW_FADING) if (backlight_fading_state) queue_wait_w_tmo(&backlight_queue, &ev, FADE_DELAY); else #endif queue_wait(&backlight_queue, &ev); /* #endif */ switch(ev.id) { /* These events must always be processed */ #ifdef _BACKLIGHT_FADE_BOOST case BACKLIGHT_FADE_FINISH: cpu_boost(false); break; #endif #ifdef _BACKLIGHT_FADE_ENABLE case BACKLIGHT_FADE_FINISH: _backlight_hw_enable((bl_dim_current|bl_dim_target) != 0); break; #endif #ifndef SIMULATOR /* Here for now or else the aggressive init messes up scrolling */ #ifdef HAVE_REMOTE_LCD case SYS_REMOTE_PLUGGED: lcd_remote_on(); lcd_remote_update(); break; case SYS_REMOTE_UNPLUGGED: lcd_remote_off(); break; #elif defined HAVE_REMOTE_LCD_AS_MAIN case SYS_REMOTE_PLUGGED: lcd_on(); lcd_update(); break; case SYS_REMOTE_UNPLUGGED: lcd_off(); break; #endif /* HAVE_REMOTE_LCD/ HAVE_REMOTE_LCD_AS_MAIN */ #endif /* !SIMULATOR */ #ifdef SIMULATOR /* This one here too for lack of a better place */ case SYS_SCREENDUMP: screen_dump(); break; #endif case SYS_USB_CONNECTED: /* Tell the USB thread that we are safe */ DEBUGF("backlight_thread got SYS_USB_CONNECTED\n"); usb_acknowledge(SYS_USB_CONNECTED_ACK); break; case SYS_USB_DISCONNECTED: usb_acknowledge(SYS_USB_DISCONNECTED_ACK); break; #ifdef BACKLIGHT_DRIVER_CLOSE /* Get out of here */ case BACKLIGHT_QUIT: return; #endif } if (locked) continue; switch(ev.id) { /* These events are only processed if backlight isn't locked */ #ifdef HAVE_REMOTE_LCD case REMOTE_BACKLIGHT_ON: remote_backlight_update_state(); break; case REMOTE_BACKLIGHT_OFF: remote_backlight_timer = 0; /* Disable the timeout */ _remote_backlight_off(); break; #endif /* HAVE_REMOTE_LCD */ case BACKLIGHT_ON: backlight_update_state(); break; case BACKLIGHT_OFF: backlight_timer = 0; /* Disable the timeout */ #ifndef USE_BACKLIGHT_SW_FADING _backlight_off(); #else backlight_set_up_fade_down(); #endif /* USE_BACKLIGHT_SW_FADING */ break; #ifdef HAVE_LCD_SLEEP case LCD_SLEEP: lcd_sleep(); break; #endif #ifdef HAVE_BUTTON_LIGHT case BUTTON_LIGHT_ON: buttonlight_update_state(); break; case BUTTON_LIGHT_OFF: buttonlight_timer = 0; _buttonlight_off(); break; #endif case SYS_POWEROFF: /* Lock backlight on poweroff so it doesn't */ locked = true; /* go off before power is actually cut. */ /* fall through */ #if CONFIG_CHARGING case SYS_CHARGER_CONNECTED: case SYS_CHARGER_DISCONNECTED: #endif backlight_update_state(); #ifdef HAVE_REMOTE_LCD remote_backlight_update_state(); #endif break; #if defined(USE_BACKLIGHT_SW_FADING) case SYS_TIMEOUT: if ((_backlight_fade_step(backlight_fading_state))) backlight_fading_state = NOT_FADING; break; #endif /* USE_BACKLIGHT_SW_FADING */ } } /* end while */ } static void backlight_tick(void) { if(backlight_timer) { if(--backlight_timer == 0) { backlight_off(); } } #ifdef HAVE_LCD_SLEEP else if(lcd_sleep_timer) { if(--lcd_sleep_timer == 0) { /* Queue on bl thread or freeze! */ queue_post(&backlight_queue, LCD_SLEEP, 0); } } #endif /* HAVE_LCD_SLEEP */ #ifdef HAVE_REMOTE_LCD if(remote_backlight_timer) { if(--remote_backlight_timer == 0) { remote_backlight_off(); } } #endif /* HAVE_REMOVE_LCD */ #ifdef HAVE_BUTTON_LIGHT if (buttonlight_timer) { if (--buttonlight_timer == 0) { buttonlight_off(); } } #endif /* HAVE_BUTTON_LIGHT */ } void backlight_init(void) { queue_init(&backlight_queue, true); #ifndef SIMULATOR if (_backlight_init()) { # ifdef HAVE_BACKLIGHT_PWM_FADING /* If backlight is already on, don't fade in. */ bl_dim_target = BL_PWM_COUNT; bl_dim_fraction = (BL_PWM_COUNT<<16); # endif } #endif /* Leave all lights as set by the bootloader here. The settings load will * call the appropriate backlight_set_*() functions, only changing light * status if necessary. */ #ifdef BACKLIGHT_DRIVER_CLOSE backlight_thread_id = #endif create_thread(backlight_thread, backlight_stack, sizeof(backlight_stack), 0, backlight_thread_name IF_PRIO(, PRIORITY_USER_INTERFACE) IF_COP(, CPU)); tick_add_task(backlight_tick); } #ifdef BACKLIGHT_DRIVER_CLOSE void backlight_close(void) { unsigned int thread = backlight_thread_id; /* Wait for thread to exit */ if (thread == 0) return; backlight_thread_id = 0; queue_post(&backlight_queue, BACKLIGHT_QUIT, 0); thread_wait(thread); } #endif /* BACKLIGHT_DRIVER_CLOSE */ void backlight_on(void) { queue_remove_from_head(&backlight_queue, BACKLIGHT_ON); queue_post(&backlight_queue, BACKLIGHT_ON, 0); } void backlight_off(void) { queue_post(&backlight_queue, BACKLIGHT_OFF, 0); } /* returns true when the backlight is on, * and optionally when it's set to always off. */ bool is_backlight_on(bool ignore_always_off) { return (backlight_timer > 0) /* countdown */ || (backlight_timeout == 0) /* always on */ || ((backlight_timeout < 0) && !ignore_always_off); } /* return value in ticks; 0 means always on, <0 means always off */ int backlight_get_current_timeout(void) { return backlight_timeout; } void backlight_set_timeout(int value) { backlight_timeout_normal = HZ * value; backlight_update_state(); } #if CONFIG_CHARGING void backlight_set_timeout_plugged(int value) { backlight_timeout_plugged = HZ * value; backlight_update_state(); } #endif /* CONFIG_CHARGING */ #ifdef HAS_BUTTON_HOLD /* Hold button change event handler. */ void backlight_hold_changed(bool hold_button) { if (!hold_button || (backlight_on_button_hold > 0)) /* if unlocked or override in effect */ backlight_on(); } void backlight_set_on_button_hold(int index) { if ((unsigned)index >= 3) /* if given a weird value, use default */ index = 0; backlight_on_button_hold = index; backlight_update_state(); } #endif /* HAS_BUTTON_HOLD */ #ifdef HAVE_LCD_SLEEP_SETTING void lcd_set_sleep_after_backlight_off(int index) { if ((unsigned)index >= sizeof(lcd_sleep_timeout_value)) /* if given a weird value, use default */ index = 3; lcd_sleep_timeout = HZ * lcd_sleep_timeout_value[index]; if (backlight_timer > 0 || backlight_get_current_timeout() == 0) /* Timer will be set when bl turns off or bl set to on. */ return; /* Backlight is Off */ if (lcd_sleep_timeout < 0) lcd_sleep_timer = 1; /* Always - sleep next tick */ else lcd_sleep_timer = lcd_sleep_timeout; /* Never, other */ } #endif /* HAVE_LCD_SLEEP_SETTING */ #ifdef HAVE_REMOTE_LCD void remote_backlight_on(void) { queue_post(&backlight_queue, REMOTE_BACKLIGHT_ON, 0); } void remote_backlight_off(void) { queue_post(&backlight_queue, REMOTE_BACKLIGHT_OFF, 0); } void remote_backlight_set_timeout(int value) { remote_backlight_timeout_normal = HZ * value; remote_backlight_update_state(); } #if CONFIG_CHARGING void remote_backlight_set_timeout_plugged(int value) { remote_backlight_timeout_plugged = HZ * value; remote_backlight_update_state(); } #endif /* CONFIG_CHARGING */ #ifdef HAS_REMOTE_BUTTON_HOLD /* Remote hold button change event handler. */ void remote_backlight_hold_changed(bool rc_hold_button) { if (!rc_hold_button || (remote_backlight_on_button_hold > 0)) /* if unlocked or override */ remote_backlight_on(); } void remote_backlight_set_on_button_hold(int index) { if ((unsigned)index >= 3) /* if given a weird value, use default */ index = 0; remote_backlight_on_button_hold = index; remote_backlight_update_state(); } #endif /* HAS_REMOTE_BUTTON_HOLD */ /* return value in ticks; 0 means always on, <0 means always off */ int remote_backlight_get_current_timeout(void) { return remote_backlight_timeout; } /* returns true when the backlight is on, and * optionally when it's set to always off */ bool is_remote_backlight_on(bool ignore_always_off) { return (remote_backlight_timer > 0) /* countdown */ || (remote_backlight_timeout == 0) /* always on */ || ((remote_backlight_timeout < 0) && !ignore_always_off); } #endif /* HAVE_REMOTE_LCD */ #ifdef HAVE_BACKLIGHT_BRIGHTNESS void backlight_set_brightness(int val) { if (val < MIN_BRIGHTNESS_SETTING) val = MIN_BRIGHTNESS_SETTING; else if (val > MAX_BRIGHTNESS_SETTING) val = MAX_BRIGHTNESS_SETTING; backlight_brightness = val; _backlight_set_brightness(val); #ifdef USE_BACKLIGHT_SW_FADING /* receive backlight brightness */ _backlight_fade_update_state(val); #endif } #endif /* HAVE_BACKLIGHT_BRIGHTNESS */ #ifdef HAVE_BUTTONLIGHT_BRIGHTNESS void buttonlight_set_brightness(int val) { if (val < MIN_BRIGHTNESS_SETTING) val = MIN_BRIGHTNESS_SETTING; else if (val > MAX_BRIGHTNESS_SETTING) val = MAX_BRIGHTNESS_SETTING; _buttonlight_set_brightness(val); } #endif /* HAVE_BUTTONLIGHT_BRIGHTNESS */ #else /* !defined(HAVE_BACKLIGHT) || !defined(BACKLIGHT_FULL_INIT) -- no backlight, empty dummy functions */ #if defined(HAVE_BACKLIGHT) && !defined(BACKLIGHT_FULL_INIT) void backlight_init(void) { (void)_backlight_init(); _backlight_on(); } #endif void backlight_on(void) {} void backlight_off(void) {} void buttonlight_on(void) {} void backlight_set_timeout(int value) {(void)value;} bool is_backlight_on(bool ignore_always_off) { (void)ignore_always_off; return true; } #ifdef HAVE_REMOTE_LCD void remote_backlight_on(void) {} void remote_backlight_off(void) {} void remote_backlight_set_timeout(int value) {(void)value;} bool is_remote_backlight_on(bool ignore_always_off) { (void)ignore_always_off; return true; } #endif /* HAVE_REMOTE_LCD */ #ifdef HAVE_BACKLIGHT_BRIGHTNESS void backlight_set_brightness(int val) { (void)val; } #endif #ifdef HAVE_BUTTONLIGHT_BRIGHTNESS void buttonlight_set_brightness(int val) { (void)val; } #endif #endif /* defined(HAVE_BACKLIGHT) && defined(BACKLIGHT_FULL_INIT) */