Fix Onda VX777 LCD not working on boot

This fixes an issue with some Onda VX777's where the LCD doesn't seem to be
correctly inited by the OF SPL.

Based on FS#11888 by Purling Nayuki.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29083 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 14 insertions, 5 deletions

diff --git a/firmware/target/mips/ingenic_jz47xx/onda_vx747/lcd-onda_vx747.c b/firmware/target/mips/ingenic_jz47xx/onda_vx747/lcd-onda_vx747.c
index 12c1f3eb09..56c8504649 100644
--- a/firmware/target/mips/ingenic_jz47xx/onda_vx747/lcd-onda_vx747.c
+++ b/firmware/target/mips/ingenic_jz47xx/onda_vx747/lcd-onda_vx747.c
@@ -38,7 +38,16 @@ do {                                    \
 
 #define SLEEP(x) { register int __i; for(__i=0; __i<x; __i++) asm volatile("nop\n nop\n"); }
 #define DELAY    SLEEP(700000);
-#ifdef USB_BOOT
+
+#if (defined(ONDA_VX777) && !defined(BOOTLOADER)) || defined(USB_BOOT)
+ /*
+  * Onda VX777 needs this in order to boot correctly, it looks like the SPL
+  * does not correctly initialize the LCD for Rockbox to switch it on.
+  */
+ #define RESET_LCD
+#endif
+
+#ifdef RESET_LCD
 static void _display_pin_init(void)
 {
     my__gpio_as_lcd_16bit();
@@ -61,7 +70,7 @@ static void _display_pin_init(void)
 #define SLCD_SEND_COMMAND(cmd,val) SLCD_SET_COMMAND(cmd); SLCD_SET_DATA(val);
 static void _display_init(void)
 {
-#ifdef USB_BOOT
+#ifdef RESET_LCD
     SLCD_SEND_COMMAND(REG_SOFT_RESET, SOFT_RESET(1));
     SLEEP(700000);
     SLCD_SEND_COMMAND(REG_SOFT_RESET, SOFT_RESET(0));
@@ -78,7 +87,7 @@ static void _display_init(void)
     SLCD_SEND_COMMAND(REG_ENTRY_MODE, (ENTRY_MODE_BGR | ENTRY_MODE_VID | ENTRY_MODE_AM));
 #endif
 
-#ifdef USB_BOOT
+#ifdef RESET_LCD
     SLCD_SEND_COMMAND(REG_DISP_CTRL2, 0x503);
     SLCD_SEND_COMMAND(REG_DISP_CTRL3, 1);
     SLCD_SEND_COMMAND(REG_LPCTRL, 0x10);
@@ -144,7 +153,7 @@ static void _display_init(void)
     SLCD_SEND_COMMAND(REG_DISP_CTRL1, (DISP_CTRL1_BASEE | DISP_CTRL1_VON |
                                        DISP_CTRL1_GON   | DISP_CTRL1_DTE | DISP_CTRL1_D(3)));
     SLEEP(3500000);
-#endif /* USB_BOOT */
+#endif /* RESET_LCD */
 }
 
 static void _display_on(void)
@@ -199,7 +208,7 @@ void lcd_init_controller(void)
 {
     lcd_clock_enable();
 
-#ifdef USB_BOOT
+#ifdef RESET_LCD
     _display_pin_init();
 #endif
     _set_lcd_bus();