diff --git a/src/display/Makefile.am b/src/display/Makefile.am
index 3388d27355..5430cf918e 100644
--- a/src/display/Makefile.am
+++ b/src/display/Makefile.am
@@ -10,7 +10,7 @@ CPPFLAGS = -I$(top_srcdir)/src/base -I$(top_srcdir)/src/kernel
 CFLAGS = @PSPSDK_CFLAGS@
 CCASFLAGS = $(CFLAGS)
 
-DISPLAY_OBJS = sceDisplay_0000.o sceDisplay_0001.o sceDisplay_0002.o sceDisplay_0003.o sceDisplay_0004.o sceDisplay_0005.o sceDisplay_0006.o sceDisplay_0007.o sceDisplay_0008.o sceDisplay_0009.o sceDisplay_0010.o sceDisplay_0011.o sceDisplay_0012.o sceDisplay_0013.o sceDisplay_0014.o sceDisplay_0015.o sceDisplay_0016.o sceDisplay_0017.o 
+DISPLAY_OBJS = sceDisplay_0000.o sceDisplay_0001.o sceDisplay_0002.o sceDisplay_0003.o sceDisplay_0004.o sceDisplay_0005.o sceDisplay_0006.o sceDisplay_0007.o sceDisplay_0008.o sceDisplay_0009.o sceDisplay_0010.o sceDisplay_0011.o sceDisplay_0012.o sceDisplay_0013.o sceDisplay_0014.o sceDisplay_0015.o sceDisplay_0016.o sceDisplay_0017.o sceDisplay_0018.o sceDisplay_0019.o sceDisplay_0020.o sceDisplay_0021.o sceDisplay_0022.o sceDisplay_0023.o
 
 DISPLAYDRIVER_OBJS = sceDisplay_driver_0000.o sceDisplay_driver_0001.o sceDisplay_driver_0002.o sceDisplay_driver_0003.o sceDisplay_driver_0004.o sceDisplay_driver_0005.o sceDisplay_driver_0006.o sceDisplay_driver_0007.o sceDisplay_driver_0008.o sceDisplay_driver_0009.o sceDisplay_driver_0010.o sceDisplay_driver_0011.o sceDisplay_driver_0012.o sceDisplay_driver_0013.o sceDisplay_driver_0014.o sceDisplay_driver_0015.o sceDisplay_driver_0016.o sceDisplay_driver_0017.o sceDisplay_driver_0018.o sceDisplay_driver_0019.o sceDisplay_driver_0020.o sceDisplay_driver_0021.o sceDisplay_driver_0022.o sceDisplay_driver_0023.o sceDisplay_driver_0024.o sceDisplay_driver_0025.o sceDisplay_driver_0026.o 
 
diff --git a/src/display/pspdisplay.h b/src/display/pspdisplay.h
index c72ca31dd5..1b16a1ffc5 100644
--- a/src/display/pspdisplay.h
+++ b/src/display/pspdisplay.h
@@ -146,6 +146,70 @@ int sceDisplayIsForeground(void);
  */
 int sceDisplayIsVblank(void);
 
+/**
+ * Get current display brightness
+ *
+ * @param level - Pointer to int to receive the current brightness level (0-100)
+ * @param unk1 - Pointer to int, receives unknown, it's 1 or 0
+ *
+ * @return 0 on success
+ */
+int sceDisplayGetBrightness(int *level, int *unk1);
+
+/**
+ * Get resume mode
+ *
+ * @warning This function can crash your app or worst(unexpected forced turn off your PSP)
+ *
+ * @param resume_mode - Pointer to int to receive the current resume mode
+ *
+ * @return ???
+ */
+int sceDisplayGetResumeMode(int *resume_mode);
+
+/**
+ * Get the time remaining until the next vertical blank
+ *
+ * @note start with sceDisplayWaitVblankStart() to take effect
+ *
+ * @return time remaining(in microsecond? or millisecond?)
+ *
+ * @return < 0 on error
+ */
+int sceDisplayGetVblankRest(void);
+
+/**
+ * Test whether VSYNC is active
+ */
+int sceDisplayIsVsync(void);
+
+/**
+ * Wait for vertical blank start after specified number of vertical periods
+ *
+ * @param vblank_count - Number of vertical periods before waiting for vertical blank start
+ *
+ * @return 0 on success
+ */
+int sceDisplayWaitVblankStartMulti(unsigned int vblank_count);
+
+/**
+ * Wait for vertical blank start with callback after specified number of vertical periods
+ *
+ * @param vblank_count - Number of vertical periods before waiting for vertical blank start
+ *
+ * @return 0 on success
+ */
+int sceDisplayWaitVblankStartMultiCB(unsigned int vblank_count);
+
+/**
+ * Adjust the accumulated HSYNC count
+ *
+ * @param hcount - Set accumulated HSYNC count
+ *
+ * @return 0 on success
+ */
+int sceDisplayAdjustAccumulatedHcount(int hcount);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/display/sceDisplay.S b/src/display/sceDisplay.S
index 558a71933c..4ddbc41a60 100644
--- a/src/display/sceDisplay.S
+++ b/src/display/sceDisplay.S
@@ -30,7 +30,7 @@
 	IMPORT_FUNC	"sceDisplay",0xB4F378FA,sceDisplayIsForeground
 #endif
 #ifdef F_sceDisplay_0009
-	IMPORT_FUNC	"sceDisplay",0x31C4BAA8,sceDisplay_31C4BAA8
+	IMPORT_FUNC	"sceDisplay",0x31C4BAA8,sceDisplayGetBrightness
 #endif
 #ifdef F_sceDisplay_0010
 	IMPORT_FUNC	"sceDisplay",0x9C6EAAD7,sceDisplayGetVcount
@@ -56,3 +56,21 @@
 #ifdef F_sceDisplay_0017
 	IMPORT_FUNC	"sceDisplay",0x210EAB3A,sceDisplayGetAccumulatedHcount
 #endif
+#ifdef F_sceDisplay_0018
+	IMPORT_FUNC	"sceDisplay",0xBF79F646,sceDisplayGetResumeMode
+#endif
+#ifdef F_sceDisplay_0019
+	IMPORT_FUNC	"sceDisplay",0x69B53541,sceDisplayGetVblankRest
+#endif
+#ifdef F_sceDisplay_0020
+	IMPORT_FUNC	"sceDisplay",0x210EAB3A,sceDisplayIsVsync
+#endif
+#ifdef F_sceDisplay_0021
+	IMPORT_FUNC	"sceDisplay",0x21038913,sceDisplayWaitVblankStartMulti
+#endif
+#ifdef F_sceDisplay_0022
+	IMPORT_FUNC	"sceDisplay",0x77ED8B3A,sceDisplayWaitVblankStartMultiCB
+#endif
+#ifdef F_sceDisplay_0023
+	IMPORT_FUNC	"sceDisplay",0xA83EF139,sceDisplayAdjustAccumulatedHcount
+#endif