From 4c99f9a74964c4a44ca27a216f302bdc79b23121 Mon Sep 17 00:00:00 2001
From: Karl Kurbjun <kkurbjun@gmail.com>
Date: Wed, 21 May 2008 03:50:48 +0000
Subject: Contrast settings for the gigabeat F/X

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17590 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/export/config-gigabeat.h                    |  7 +++++++
 firmware/target/arm/s3c2440/gigabeat-fx/lcd-meg-fx.c | 19 ++++++++++++++-----
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/firmware/export/config-gigabeat.h b/firmware/export/config-gigabeat.h
index a3c737187b..03cedd0049 100644
--- a/firmware/export/config-gigabeat.h
+++ b/firmware/export/config-gigabeat.h
@@ -113,6 +113,13 @@
 
 #define HAVE_LCD_FLIP
 
+/* Define this if your LCD can set contrast */
+#define HAVE_LCD_CONTRAST
+
+#define MIN_CONTRAST_SETTING        0
+#define MAX_CONTRAST_SETTING        63
+#define DEFAULT_CONTRAST_SETTING    47 /* Match boot contrast */
+
 /* LCD invert - does not currently work */
 /* #define HAVE_LCD_INVERT */
 
diff --git a/firmware/target/arm/s3c2440/gigabeat-fx/lcd-meg-fx.c b/firmware/target/arm/s3c2440/gigabeat-fx/lcd-meg-fx.c
index 5ace2a61f6..7484cae94e 100644
--- a/firmware/target/arm/s3c2440/gigabeat-fx/lcd-meg-fx.c
+++ b/firmware/target/arm/s3c2440/gigabeat-fx/lcd-meg-fx.c
@@ -310,6 +310,20 @@ void lcd_set_flip(bool yesno) {
     LCD_SPI_stop();
 }
 
+int lcd_default_contrast(void)
+{
+    return DEFAULT_CONTRAST_SETTING;
+}
+
+void lcd_set_contrast(int val) {
+    if (!lcd_on)
+        return;
+
+    LCD_SPI_start();
+    LCD_SPI_setreg(0x0B, (unsigned char) val);
+    LCD_SPI_stop();
+}
+
 void lcd_set_invert_display(bool yesno) {
     if (!lcd_on)
         return;
@@ -498,8 +512,3 @@ void lcd_blit_yuv(unsigned char * const src[3],
     }
 }
 
-void lcd_set_contrast(int val) {
-  (void) val;
-  // TODO:
-}
-
-- 
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