From 14a6fd9bbe9c80edbc3b414e47376a20908cdba1 Mon Sep 17 00:00:00 2001
From: Rob Purchase <shotofadds@rockbox.org>
Date: Mon, 13 Oct 2008 20:25:16 +0000
Subject: [PATCH] Hopefully fix the D2s 'cut and repeated LCD lines' bug (fix
 suggested by Francesco Rigoni).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18801 a1c6a512-1295-4272-9138-f99709370657
---
 docs/CREDITS                                      |  1 +
 firmware/target/arm/tcc780x/cowond2/lcd-cowond2.c | 14 +++++++++++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/docs/CREDITS b/docs/CREDITS
index 121b030d41..53addf0121 100644
--- a/docs/CREDITS
+++ b/docs/CREDITS
@@ -424,6 +424,7 @@ Denes Balatoni
 Roy Wallace
 Eric Lassauge
 François Dinel
+Francesco Rigoni
 
 The libmad team
 The wavpack team
diff --git a/firmware/target/arm/tcc780x/cowond2/lcd-cowond2.c b/firmware/target/arm/tcc780x/cowond2/lcd-cowond2.c
index 70d823a25b..b41117c259 100644
--- a/firmware/target/arm/tcc780x/cowond2/lcd-cowond2.c
+++ b/firmware/target/arm/tcc780x/cowond2/lcd-cowond2.c
@@ -73,24 +73,36 @@ void lcd_set_contrast(int val)
 
 /* LTV250QV panel functions */
 
+/* Delay loop based on CPU frequency (FREQ>>23 is 3..22 for 32MHz..192MHz) */
+static void delay_loop(void)
+{
+    unsigned long x;
+    for (x = (unsigned)(FREQ>>23); x; x--);
+}
+#define DELAY delay_loop()
+
 static void ltv250qv_write(unsigned int command)
 {
     int i;
     
     GPIOA_CLEAR = LTV250QV_CS;
+    DELAY;
 
     for (i = 23; i >= 0; i--)
     {
       GPIOA_CLEAR = LTV250QV_SCL;
+      DELAY;
 
       if ((command>>i) & 1)
         GPIOA_SET = LTV250QV_SDI;
       else
         GPIOA_CLEAR = LTV250QV_SDI;
       
+      DELAY;
       GPIOA_SET = LTV250QV_SCL;
     }
 
+    DELAY;
     GPIOA_SET = LTV250QV_CS;
 }
 
@@ -162,7 +174,7 @@ static void lcd_display_on(void)
     lcd_write_reg(3,  0xE100);
     lcd_write_reg(4,  0x1000);
     lcd_write_reg(5,  0x5033);
-    lcd_write_reg(6,  0x4);
+    lcd_write_reg(6,  0x2);     /* vertical back porch adjusted from 0x4 in OF */
     lcd_write_reg(7,  0x30);
     lcd_write_reg(8,  0x41C);
     lcd_write_reg(16, 0x207);