From 4fdf4ad728ac93336c850c7da8966e8d00bddbf8 Mon Sep 17 00:00:00 2001
From: Maurus Cuelenaere <mcuelenaere@gmail.com>
Date: Sun, 3 Jan 2010 15:57:09 +0000
Subject: Onda VX747/VX777: disable LCD when backlight is off (saves power)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24167 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/target/mips/ingenic_jz47xx/lcd-jz4740.c            | 13 ++++++++++---
 .../mips/ingenic_jz47xx/onda_vx747/backlight-onda_vx7X7.c   |  9 ++++++++-
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/firmware/target/mips/ingenic_jz47xx/lcd-jz4740.c b/firmware/target/mips/ingenic_jz47xx/lcd-jz4740.c
index 99ffcf2981..7561d593db 100644
--- a/firmware/target/mips/ingenic_jz47xx/lcd-jz4740.c
+++ b/firmware/target/mips/ingenic_jz47xx/lcd-jz4740.c
@@ -49,20 +49,27 @@ void lcd_init_device(void)
     system_enable_irq(DMA_IRQ(DMA_LCD_CHANNEL));
 }
 
+#ifdef HAVE_LCD_ENABLE
 void lcd_enable(bool state)
 {
+    if(lcd_is_on == state)
+        return;
+
+    __cpm_start_lcd();
+
     if(state)
     {
         lcd_on();
-#ifdef HAVE_LCD_ENABLE
         send_event(LCD_EVENT_ACTIVATION, NULL);
-#endif
     }
     else
         lcd_off();
-    
+
+    __cpm_stop_lcd();
+
     lcd_is_on = state;
 }
+#endif
 
 bool lcd_active(void)
 {
diff --git a/firmware/target/mips/ingenic_jz47xx/onda_vx747/backlight-onda_vx7X7.c b/firmware/target/mips/ingenic_jz47xx/onda_vx747/backlight-onda_vx7X7.c
index 315432ef6b..7f834129b3 100644
--- a/firmware/target/mips/ingenic_jz47xx/onda_vx747/backlight-onda_vx7X7.c
+++ b/firmware/target/mips/ingenic_jz47xx/onda_vx747/backlight-onda_vx7X7.c
@@ -22,6 +22,7 @@
 #include "config.h"
 #include "jz4740.h"
 #include "backlight-target.h"
+#include "lcd.h"
 
 /* PWM_CHN7 == GPIO(32*3 + 31) */
 #define BACKLIGHT_GPIO  (32*3+31)
@@ -89,12 +90,18 @@ bool _backlight_init(void)
 
 void _backlight_on(void)
 {
+#ifdef HAVE_LCD_ENABLE
+    lcd_enable(true); /* power on lcd */
+#endif
     set_backlight_on();
 }
 
 void _backlight_off(void)
 {
     set_backlight_off();
+#ifdef HAVE_LCD_ENABLE
+    lcd_enable(false); /* power off lcd */
+#endif
 }
 
 #ifdef HAVE_BACKLIGHT_BRIGHTNESS
@@ -108,6 +115,6 @@ void _backlight_set_brightness(int brightness)
 /* Turn off LED supply */
 void _backlight_lcd_sleep(void)
 {
-    set_backlight_off();
+    _backlight_off();
 }
 #endif
-- 
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