Turn backlight ON at boot unless bootloader has already done that.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11992 a1c6a512-1295-4272-9138-f99709370657

apps/main.c

@@ -306,6 +306,8 @@ static void init(void)
     cpu_boost(true);
 #endif
     
+    backlight_init();
+
     buffer_init();
 
     settings_reset();
@@ -347,8 +349,6 @@ static void init(void)
     m5636_init();
 #endif
 
-    backlight_init();
-
     button_init();
 
     powermgmt_init();

firmware/backlight.c

@@ -152,8 +152,8 @@ static int fade_in_count = 1;
 static int fade_out_count = 4;
 
 static bool bl_timer_active = false;
-static int bl_dim_current = BL_PWM_COUNT;
+static int bl_dim_current = 0;
-static int bl_dim_target  = BL_PWM_COUNT;
+static int bl_dim_target  = 0;
 static int bl_pwm_counter = 0;
 static volatile int bl_cycle_counter = 0;
 static enum {DIM_STATE_START, DIM_STATE_MAIN} bl_dim_state = DIM_STATE_START;
@@ -556,17 +556,21 @@ static void backlight_tick(void)
 void backlight_init(void)
 {
     queue_init(&backlight_queue, true);
-    create_thread(backlight_thread, backlight_stack,
+
-                  sizeof(backlight_stack), backlight_thread_name 
-                  IF_PRIO(, PRIORITY_SYSTEM));
-    tick_add_task(backlight_tick);
 #ifdef SIMULATOR
     /* do nothing */
 #elif defined(__BACKLIGHT_INIT)
     /* Remove the __BACKLIGHT_INIT references when __backlight_init is
        available on all backlighted targets. Take them out of the
        backlight-target.h files as well */
-    __backlight_init();
+    if (__backlight_init())
+    {
+# if defined(HAVE_BACKLIGHT_PWM_FADING) && !defined(SIMULATOR)
+        /* If backlight is already on, don't fade in. */
+        bl_dim_current = BL_PWM_COUNT;
+        bl_dim_target = BL_PWM_COUNT;
+# endif
+    }
 #elif CONFIG_BACKLIGHT == BL_PA14_LO || CONFIG_BACKLIGHT == BL_PA14_HI
     PACR1 &= ~0x3000;    /* Set PA14 (backlight control) to GPIO */
     or_b(0x40, &PAIORH); /* ..and output */
@@ -575,6 +579,11 @@ void backlight_init(void)
 #ifdef HAVE_REMOTE_LCD
     remote_backlight_on();
 #endif
+    
+    create_thread(backlight_thread, backlight_stack,
+                  sizeof(backlight_stack), backlight_thread_name 
+                  IF_PRIO(, PRIORITY_SYSTEM));
+    tick_add_task(backlight_tick);
 }
 
 #ifdef X5_BACKLIGHT_SHUTDOWN
@@ -803,6 +812,7 @@ void backlight_init(void)
 {
 #ifdef __BACKLIGHT_INIT
     __backlight_init();
+    __backlight_on();
 #endif
 }
 #endif

firmware/target/arm/gigabeat/meg-fx/backlight-meg-fx.c

@@ -113,7 +113,7 @@ unsigned char charging_leds[] = { 0x00, 0x20, 0x38, 0x3C };
 
 
 
-void __backlight_init(void)
+bool __backlight_init(void)
 {
     backlight_control = BACKLIGHT_CONTROL_IDLE;
 
@@ -127,6 +127,8 @@ void __backlight_init(void)
 	initial_tick_delay = 2000;
     /* put the led control on the tick list */
     tick_add_task(led_control_service);
+    
+    return true;
 }
 
 

firmware/target/arm/gigabeat/meg-fx/backlight-target.h

@@ -76,7 +76,7 @@ void __buttonlight_mode(enum buttonlight_mode mode,
                         unsigned short brightness);
 
 
-void __backlight_init(void);
+bool __backlight_init(void);
 void __backlight_on(void);
 void __backlight_off(void);
 void __backlight_set_brightness(int val);

firmware/target/coldfire/iaudio/x5/backlight-target.h

@@ -20,7 +20,7 @@
 #define BACKLIGHT_TARGET_H
 
 #define __BACKLIGHT_INIT
-void __backlight_init(void);
+bool __backlight_init(void);
 void __backlight_on(void);
 void __backlight_off(void);
 void __backlight_set_brightness(int val);

firmware/target/coldfire/iaudio/x5/backlight-x5.c

@@ -24,10 +24,12 @@
 #include "pcf50606.h"
 #include "lcd.h"
 
-void __backlight_init(void)
+bool __backlight_init(void)
 {
     __backlight_set_brightness(DEFAULT_BRIGHTNESS_SETTING);
     __backlight_on();
+    
+    return true; /* Backlight always ON after boot. */
 }
 
 void __backlight_on(void)

firmware/target/coldfire/iriver/backlight-target.h

@@ -20,7 +20,7 @@
 #define BACKLIGHT_TARGET_H
 
 #define __BACKLIGHT_INIT
-void __backlight_init(void);
+bool __backlight_init(void); /* Returns backlight current state (true=ON). */
 void __backlight_on(void);
 void __backlight_off(void);
 #ifdef HAVE_BACKLIGHT_BRIGHTNESS

firmware/target/coldfire/iriver/h100/backlight-h100.c

@@ -24,11 +24,13 @@
 #include "backlight.h"
 #include "lcd.h"
 
-void __backlight_init(void)
+/* Returns the current state of the backlight (true=ON, false=OFF). */
+bool __backlight_init(void)
 {
     or_l(0x00020000, &GPIO1_ENABLE);
     or_l(0x00020000, &GPIO1_FUNCTION);
-    and_l(~0x00020000, &GPIO1_OUT);  /* Start with the backlight ON */
+    
+    return (GPIO1_OUT & 0x00020000) ? false : true;
 }
 
 void __backlight_on(void)

firmware/target/coldfire/iriver/h300/backlight-h300.c

@@ -25,11 +25,13 @@
 #include "pcf50606.h"
 #include "lcd.h"
 
-void __backlight_init(void)
+bool __backlight_init(void)
 {
     or_l(0x00020000, &GPIO1_ENABLE);
     or_l(0x00020000, &GPIO1_FUNCTION);
     or_l(0x00020000, &GPIO1_OUT);  /* Start with the backlight ON */
+    
+    return true; /* Backlight always ON after boot. */
 }
 
 void __backlight_on(void)