From 589d2110dc6d7d1104554062ac5f01246c7f8acf Mon Sep 17 00:00:00 2001
From: Szymon Dziok <b0hoon@o2.pl>
Date: Thu, 2 Dec 2010 20:35:25 +0000
Subject: HDD6330: implement block transfers through the LCD2 bridge in
 lcd_update_rect(), speedup is huge, fps over 4 times faster.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28722 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/export/config/gogearhdd6330.h            |  2 +-
 firmware/target/arm/philips/hdd6330/lcd-hdd6330.c | 98 +++++++++++++++--------
 tools/configure                                   |  2 +-
 3 files changed, 65 insertions(+), 37 deletions(-)

diff --git a/firmware/export/config/gogearhdd6330.h b/firmware/export/config/gogearhdd6330.h
index 4a2a6a42fe..786b9ad30a 100644
--- a/firmware/export/config/gogearhdd6330.h
+++ b/firmware/export/config/gogearhdd6330.h
@@ -57,7 +57,7 @@
 #define LCD_WIDTH  220
 #define LCD_HEIGHT 176
 #define LCD_DEPTH  16   /* 65536 colours */
-#define LCD_PIXELFORMAT RGB565  /* rgb565 byte-swapped */
+#define LCD_PIXELFORMAT RGB565SWAPPED /* rgb565 byte-swapped */
 
 #ifndef BOOTLOADER
 /* Define this if your LCD can be enabled/disabled */
diff --git a/firmware/target/arm/philips/hdd6330/lcd-hdd6330.c b/firmware/target/arm/philips/hdd6330/lcd-hdd6330.c
index 3d9cb036f1..c8127c4450 100644
--- a/firmware/target/arm/philips/hdd6330/lcd-hdd6330.c
+++ b/firmware/target/arm/philips/hdd6330/lcd-hdd6330.c
@@ -30,14 +30,7 @@ static unsigned lcd_yuv_options SHAREDBSS_ATTR = 0;
 /* wait for LCD */
 static inline void lcd_wait_write(void)
 {
-    int i = 0;
-    while (LCD2_PORT & LCD2_BUSY_MASK)
-    {
-        if (i < 2000)
-            i++;
-        else
-            LCD2_PORT &= ~LCD2_BUSY_MASK;
-    }
+    while (LCD2_PORT & LCD2_BUSY_MASK);
 }
 
 /* send LCD data */
@@ -48,19 +41,13 @@ static void lcd_send_data(unsigned data)
 }
 
 /* send LCD command */
-static void lcd_send_cmd(unsigned cmd)
+static void lcd_send_reg(unsigned reg)
 {
     lcd_wait_write();
-    LCD2_PORT = LCD2_CMD_MASK | (cmd & 0xff);
+    LCD2_PORT = LCD2_CMD_MASK | (reg & 0xff);
     lcd_wait_write();
 }
 
-static inline void lcd_send_pixel(unsigned pixel)
-{
-    lcd_send_data(pixel >> 8);
-    lcd_send_data(pixel);
-}
-
 void lcd_init_device(void)
 {
     /* init handled by the OF bootloader */
@@ -118,42 +105,83 @@ void lcd_update(void)
 /* Update a fraction of the display. */
 void lcd_update_rect(int x, int y, int width, int height)
 {
-    const fb_data *addr;
-    
+    unsigned long *addr;
+    int new_x, new_width;
+
+    /* Ensure x and width are both even - so we can read 32-bit aligned 
+       data from lcd_framebuffer */
+    new_x = x&~1;
+    new_width = width&~1;
+    if (new_x+new_width < x+width) new_width += 2;
+    x = new_x;
+    width = new_width;
+
     if (x + width >= LCD_WIDTH)
         width = LCD_WIDTH - x;
     if (y + height >= LCD_HEIGHT)
         height = LCD_HEIGHT - y;
-        
+
     if ((width <= 0) || (height <= 0))
         return; /* Nothing left to do. */
 
-    addr = &lcd_framebuffer[y][x];
-
-    lcd_send_cmd(0x01);
+    lcd_send_reg(0x01);
     lcd_send_data(0x48);
 
-    lcd_send_cmd(0x05);
+    lcd_send_reg(0x05);
     lcd_send_data(0x0f);
 
-    lcd_send_cmd(0x08);
+    lcd_send_reg(0x08);
     lcd_send_data(y);
 
-    lcd_send_cmd(0x09);
+    lcd_send_reg(0x09);
     lcd_send_data(y + height - 1);
 
-    lcd_send_cmd(0x0a);
+    lcd_send_reg(0x0a);
     lcd_send_data(x + 16);
 
-    lcd_send_cmd(0x0b);
+    lcd_send_reg(0x0b);
     lcd_send_data(x + width - 1 + 16);
 
-    lcd_send_cmd(0x06);
-    do {
-        int w = width;
-        do {
-            lcd_send_pixel(*addr++);
-        } while (--w > 0);
-        addr += LCD_WIDTH - width;
-    } while (--height > 0);
+    lcd_send_reg(0x06);
+
+    addr = (unsigned long*)&lcd_framebuffer[y][x];
+
+    while (height > 0) 
+    {
+        int c, r;
+        int h, pixels_to_write;
+
+        pixels_to_write = (width * height) * 2;
+        h = height;
+
+        /* calculate how much we can do in one go */
+        if (pixels_to_write > 0x10000) 
+        {
+            h = (0x10000/2) / width;
+            pixels_to_write = (width * h) * 2;
+        }
+
+        LCD2_BLOCK_CTRL = 0x10000080;
+        LCD2_BLOCK_CONFIG = 0xc0010000 | (pixels_to_write - 1);
+        LCD2_BLOCK_CTRL = 0x34000000;
+
+        /* for each row */
+        for (r = 0; r < h; r++) 
+        {
+            /* for each column */
+            for (c = 0; c < width; c += 2) 
+            {
+                while (!(LCD2_BLOCK_CTRL & LCD2_BLOCK_TXOK));
+
+                /* output 2 pixels */
+                LCD2_BLOCK_DATA = *addr++;
+            }
+            addr += (LCD_WIDTH - width)/2;
+        }
+
+        while (!(LCD2_BLOCK_CTRL & LCD2_BLOCK_READY));
+        LCD2_BLOCK_CONFIG = 0;
+
+        height -= h;
+    }
 }
diff --git a/tools/configure b/tools/configure
index ac109dff09..b8d99d7aca 100755
--- a/tools/configure
+++ b/tools/configure
@@ -2363,7 +2363,7 @@ fi
     arm7tdmicc
     tool="$rootdir/tools/scramble -mi4v3 -model=6330 -type=RBOS"
     bmp2rb_mono="$rootdir/tools/bmp2rb -f 0"
-    bmp2rb_native="$rootdir/tools/bmp2rb -f 4"
+    bmp2rb_native="$rootdir/tools/bmp2rb -f 5"
     output="rockbox.mi4"
     appextra="recorder:gui:radio"
     plugins="yes"
-- 
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