HDD1630: implement lcd_enable (display on/off).

Change-Id: I8b72a9c333d8a9dbcb62c366a9af298f1dd9b2f7

firmware/export/config/gogearhdd1630.h

@@ -56,7 +56,7 @@
 
 #ifndef BOOTLOADER
 /* Define this if your LCD can be enabled/disabled */
-/* #define HAVE_LCD_ENABLE */
+#define HAVE_LCD_ENABLE
 
 /* Define this if your LCD can be put to sleep. HAVE_LCD_ENABLE
  * should be defined as well.

firmware/target/arm/philips/hdd1630/backlight-hdd1630.c

@@ -22,6 +22,7 @@
 #include "backlight-target.h"
 #include "system.h"
 #include "backlight.h"
+#include "lcd.h"
 #include "synaptics-mep.h"
 
 #ifdef HAVE_BACKLIGHT_BRIGHTNESS
@@ -36,6 +37,10 @@ void _backlight_set_brightness(int brightness)
 
 void _backlight_on(void)
 {
+#ifdef HAVE_LCD_ENABLE
+    lcd_enable(true);
+#endif
+
     GPO32_ENABLE |= 0x400;
     GPO32_VAL    |= 0x400;
 }
@@ -44,6 +49,10 @@ void _backlight_off(void)
 {
     GPO32_ENABLE |= 0x400;
     GPO32_VAL    &=~0x400;
+
+#ifdef HAVE_LCD_ENABLE
+    lcd_enable(false);
+#endif
 }
 
 #ifdef HAVE_BUTTON_LIGHT

firmware/target/arm/philips/hdd1630/lcd-hdd1630.c

@@ -77,6 +77,9 @@
 #define RDEV    0xd4
 #define RDRR    0xd5
 
+/* Whether the lcd is currently enabled or not */
+static bool lcd_enabled;
+
 /* Display status */
 static unsigned lcd_yuv_options SHAREDBSS_ATTR = 0;
 static unsigned mad_ctrl = 0;
@@ -239,8 +242,45 @@ void lcd_init_device(void)
 
     lcd_send_cmd(DISPON);
 #endif
+    lcd_enabled = true;
 }
 
+#ifdef HAVE_LCD_ENABLE
+/* enable / disable lcd */
+void lcd_enable(bool on)
+{
+    if (on == lcd_enabled)
+        return;
+
+    if (on) /* lcd_display_on() */
+    {
+        /* from the OF */
+        lcd_send_cmd(SLPOUT);
+        sleep(HZ/5); /* 200ms */
+
+        /* Probably out of sync and we don't wanna pepper the code with
+           lcd_update() calls for this. */
+        lcd_update();
+        send_event(LCD_EVENT_ACTIVATION, NULL);
+
+        lcd_enabled = true;
+    }
+    else /* lcd_display_off() */
+    {
+        /* from the OF */
+        lcd_send_cmd(SLPIN);
+
+        lcd_enabled = false;
+    }
+}
+
+
+bool lcd_active(void)
+{
+    return lcd_enabled;
+}
+#endif /* HAVE_LCD_ENABLE */
+
 /*** hardware configuration ***/
 int lcd_default_contrast(void)
 {