From 7bc876cc86de08c9ca2e22f0fb37875cb85d1a3d Mon Sep 17 00:00:00 2001
From: bertrik <bertrik@a1c6a512-1295-4272-9138-f99709370657>
Date: Thu, 30 Jul 2009 18:33:17 +0000
Subject: [PATCH] Meizu M3: check LCD_STATUS in the lcd driver instead of using
 delay loops

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22090 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/target/arm/s5l8700/meizu-m3/lcd-m3.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/firmware/target/arm/s5l8700/meizu-m3/lcd-m3.c b/firmware/target/arm/s5l8700/meizu-m3/lcd-m3.c
index 2c52faeb8..3420e92d6 100644
--- a/firmware/target/arm/s5l8700/meizu-m3/lcd-m3.c
+++ b/firmware/target/arm/s5l8700/meizu-m3/lcd-m3.c
@@ -29,7 +29,9 @@
 #include "s5l8700.h"
 
 /*** definitions ***/
-
+#define STAT_BUS_IDLE   (1<<8)  /* Data bus idle */
+#define STAT_FULL       (1<<4)  /* FIFO full */
+#define STAT_READON     (1<<0)  /* Read operation done */
 
 /** globals **/
 static uint8_t lcd_type;
@@ -81,9 +83,13 @@ static uint8_t lcd_readdata(void)
 
 static void lcd_writereg(uint32_t reg, uint32_t data)
 {
+    while (LCD_STATUS & STAT_FULL);
     LCD_WCMD = reg >> 8;
+    while (LCD_STATUS & STAT_FULL);
     LCD_WCMD = reg & 0xff;
+    while (LCD_STATUS & STAT_FULL);
     LCD_WDATA = data >> 8;
+    while (LCD_STATUS & STAT_FULL);
     LCD_WDATA = data & 0xff;
 }
 
@@ -290,10 +296,12 @@ void lcd_update(void)
         LCD_WCMD = 0x22;
     }
     for(p=&lcd_framebuffer[0][0], i=0;i<LCD_WIDTH*LCD_FBHEIGHT;++i, ++p) {
+        while (LCD_STATUS & STAT_FULL);
         LCD_WDATA = RGB_UNPACK_RED(*p);
+        while (LCD_STATUS & STAT_FULL);
         LCD_WDATA = RGB_UNPACK_GREEN(*p);
+        while (LCD_STATUS & STAT_FULL);
         LCD_WDATA = RGB_UNPACK_BLUE(*p);
-        lcd_sleep(3); /* if data is sent too fast to lcdif, machine freezes */
     }
 }
 
-- 
2.11.4.GIT