Significant LCD speedup for all greyscale iPods and Sansa c200 (c200, 4th Gen, Mini 1st Gen: >3.3x speedup, 1st..3rd Gen: ~2x speedup, Mini 2nd Gen: ~30% speedup).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15655 a1c6a512-1295-4272-9138-f99709370657

2 files changed, 9 insertions, 3 deletions

diff --git a/firmware/target/arm/ipod/lcd-gray.c b/firmware/target/arm/ipod/lcd-gray.c
index 9f732265b4..bbe7703a03 100644
--- a/firmware/target/arm/ipod/lcd-gray.c
+++ b/firmware/target/arm/ipod/lcd-gray.c
@@ -153,9 +153,15 @@ void lcd_init_device(void)
                                  * f/32, for better blacklevel stability */
     else
         power_reg_h = 0x1100;
-#elif defined IPOD_MINI2G
+#endif
+
+#ifdef IPOD_MINI2G /* serial LCD hookup */
     lcd_wait_write();
-    LCD1_CONTROL = (LCD1_CONTROL & ~0x1f00000) | 0x1700000;
+    LCD1_CONTROL = 0x01730084; /* fastest setting */
+#elif defined(IPOD_1G2G) || defined(IPOD_3G)
+    LCD1_CONTROL = (LCD1_CONTROL & 0x0002) | 0x0084; /* fastest setting, keep backlight bit */
+#else
+    LCD1_CONTROL = 0x0084; /* fastest setting */
 #endif
 
     lcd_cmd_and_data(R_POWER_CONTROL, POWER_REG_H | 0xc);
diff --git a/firmware/target/arm/sandisk/sansa-c200/lcd-c200.c b/firmware/target/arm/sandisk/sansa-c200/lcd-c200.c
index 49e1268b54..b17cce30fa 100644
--- a/firmware/target/arm/sandisk/sansa-c200/lcd-c200.c
+++ b/firmware/target/arm/sandisk/sansa-c200/lcd-c200.c
@@ -100,7 +100,7 @@ void lcd_init_device(void)
     LCD1_CONTROL |= 0x4;
     udelay(10);
 
-    LCD1_CONTROL = 0x4687;
+    LCD1_CONTROL = 0x0084; /* bits (9,10) = 00 -> fastest setting */
     udelay(10000);
 
     lcd_send_command(R_STANDBY_OFF);