Apply FS#9195 (LCD disable for sansa c200), which puts the sansa c200 display controller in standby when the backlight is turned off and thereby improves runtime. I measured 40 minutes improvement over a runtime of about 14h.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18198 a1c6a512-1295-4272-9138-f99709370657

2 files changed, 25 insertions, 1 deletions

diff --git a/firmware/export/config-c200.h b/firmware/export/config-c200.h
index 81b79373e4..d7b8e7e824 100644
--- a/firmware/export/config-c200.h
+++ b/firmware/export/config-c200.h
@@ -48,7 +48,7 @@
 #define LCD_PIXELFORMAT RGB565 /* rgb565 */
 
 /* define this if you have LCD enable function */
-/* TODO: #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. */
diff --git a/firmware/target/arm/sandisk/sansa-c200/lcd-c200.c b/firmware/target/arm/sandisk/sansa-c200/lcd-c200.c
index fc936b1287..9e7c81e20d 100644
--- a/firmware/target/arm/sandisk/sansa-c200/lcd-c200.c
+++ b/firmware/target/arm/sandisk/sansa-c200/lcd-c200.c
@@ -26,6 +26,7 @@
 
 /* Display status */
 static unsigned lcd_yuv_options SHAREDBSS_ATTR = 0;
+static bool is_lcd_enabled = true;
 
 /* LCD command set for Samsung S6B33B2 */
 
@@ -189,6 +190,29 @@ void lcd_set_invert_display(bool yesno)
     (void)yesno;
 }
 
+void lcd_enable(bool yesno)
+{
+    if (yesno == is_lcd_enabled)
+        return;
+
+    if (yesno)
+    {
+        lcd_send_command(R_STANDBY_OFF);
+        lcd_send_command(R_DISPLAY_ON);
+    }
+    else
+    {
+        lcd_send_command(R_STANDBY_ON);
+    }
+    is_lcd_enabled = yesno;
+}
+
+bool lcd_enabled(void)
+{
+    return is_lcd_enabled;
+}
+
+
 /* turn the display upside down (call lcd_update() afterwards) */
 void lcd_set_flip(bool yesno)
 {