iPod Video LCD: Avoid white flash when entering sleep mode or shutting off.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29026 a1c6a512-1295-4272-9138-f99709370657

2 files changed, 4 insertions, 1 deletions

diff --git a/firmware/target/arm/ipod/backlight-nano_video.c b/firmware/target/arm/ipod/backlight-nano_video.c
index 2f56f94225..11893a591d 100644
--- a/firmware/target/arm/ipod/backlight-nano_video.c
+++ b/firmware/target/arm/ipod/backlight-nano_video.c
@@ -97,7 +97,6 @@ void _backlight_hw_enable(bool on)
     {
         GPIO_CLEAR_BITWISE(GPIOD_OUTPUT_VAL, 0x80);
         GPIO_CLEAR_BITWISE(GPIOB_OUTPUT_VAL, 0x08);
-        sleep(HZ/20);
     }
     enabled = on;
 }
diff --git a/firmware/target/arm/ipod/video/lcd-video.c b/firmware/target/arm/ipod/video/lcd-video.c
index 74d627730f..944f2c4236 100644
--- a/firmware/target/arm/ipod/video/lcd-video.c
+++ b/firmware/target/arm/ipod/video/lcd-video.c
@@ -509,6 +509,10 @@ static void bcm_command(unsigned cmd)
 
 static void bcm_powerdown(void)
 {
+    /* Immediately switch off the backlight to avoid flashing. */
+    _backlight_hw_enable(false);
+    
+    /* Not sure what this does. */
     bcm_write32(0x10001400, bcm_read32(0x10001400) & ~0xF0);
 
     /* Blanks the LCD and decreases power consumption