455_x1000_LCD_Sleep_Clock_Off.diff

x1000_LCD_Sleep_Clock_Off 'revisited' for cd91c238de and newer

When LCD Sleep, Turn LCD Clock off
NEW: Dont mess with Bootloader (or Boot to OF gives Black Screen)
     (Question: does it save Power to Stop the Clock, when no this is not useful)

Credit ZappBranigan2972 on forums / F. Jacobsen on the Theme Site

---

--- a/firmware/target/mips/ingenic_x1000/lcd-x1000.c.orig   2024-07-20 09:55:10.726080038 +0200
+++ b/firmware/target/mips/ingenic_x1000/lcd-x1000.c    2024-07-20 09:22:14.643605844 +0200
@@ -360,6 +360,20 @@
     jz_writef(CPM_LPCDR, CE(0));
 }

+static void lcd_clock_sleep(bool sleep)
+{
+#ifdef BOOTLOADER
+    (void)sleep;
+#else
+    if (sleep)
+        jz_writef(CPM_LPCDR, CE(1), STOP(1));
+    else
+        jz_writef(CPM_LPCDR, CE(1), STOP(0));
+    while(jz_readf(CPM_LPCDR, BUSY));
+    jz_writef(CPM_LPCDR, CE(0));
+#endif
+}
+
 void lcd_exec_commands(const uint32_t* cmdseq)
 {
     while(*cmdseq != LCD_INSTR_END) {
@@ -389,6 +403,7 @@
 void lcd_init_device(void)
 {
     jz_writef(CPM_CLKGR, LCD(0));
+    lcd_clock_sleep(false); /* LCD Clock on, or Rolo etc. goes haywire */

     lcd_init_controller(&lcd_tgt_config);
     lcd_init_descriptors(&lcd_tgt_config);
@@ -431,10 +446,12 @@
 #if defined(LCD_X1000_FASTSLEEP)
     if(state && !en) {
         lcd_tgt_sleep(true);
+        lcd_clock_sleep(true);
         lcd_sleeping = true;
     } else
 #endif
     if(!state && en && lcd_sleeping) {
+        lcd_clock_sleep(false);
         lcd_tgt_sleep(false);
         lcd_sleeping = false;
     }