IPU: Reorder DMA timing for IPU_TO and IPU_FROM

pcsx2/IPU/IPU.h

@@ -91,6 +91,8 @@ struct alignas(16) tIPU_BP {
 
 	__fi void Advance(uint bits)
 	{
+		FillBuffer(bits);
+
 		BP += bits;
 		pxAssume( BP <= 256 );
 
@@ -112,9 +114,9 @@ struct alignas(16) tIPU_BP {
 				// if FP == 0 then an already-drained buffer is being advanced, and we need to drop a
 				// quadword from the IPU FIFO.
 
-				if (!FP)
-					ipu_fifo.in.read(&internal_qwc[0]);
-
+				if (ipu_fifo.in.read(&internal_qwc[0]))
+					FP = 1;
+				else
 					FP = 0;
 			}
 		}

pcsx2/IPU/IPU_Fifo.cpp

@@ -86,6 +86,9 @@ int IPU_Fifo_Input::write(u32* pMem, int size)
 		pMem += 4;
 	}
 
+	if (g_BP.IFC == 8)
+		IPU1Status.DataRequested = false;
+
 	return firsttrans;
 }
 
@@ -99,7 +102,7 @@ int IPU_Fifo_Input::read(void *value)
 
 		if(ipu1ch.chcr.STR && cpuRegs.eCycle[4] == 0x9999)
 		{
-			CPU_INT( DMAC_TO_IPU, 32 );
+			CPU_INT( DMAC_TO_IPU, 4);
 		}
 
 		if (g_BP.IFC == 0) return 0;
@@ -135,7 +138,7 @@ int IPU_Fifo_Output::write(const u32 *value, uint size)
 		}
 	/*} while(true);*/
 	if(ipu0ch.chcr.STR)
-		IPU_INT_FROM(64);
+		IPU_INT_FROM(ipuRegs.ctrl.OFC * BIAS);
 	return origsize - size;
 }
 

pcsx2/IPU/IPUdma.cpp

@@ -121,7 +121,7 @@ void IPU1dma()
 	if(totalqwc == 0 || (IPU1Status.DMAFinished && !IPU1Status.InProgress))
 	{
 		totalqwc = std::max(4, totalqwc);
-		IPU_INT_TO(totalqwc);
+		IPU_INT_TO(totalqwc * BIAS);
 	}
 	else
 	{
@@ -137,7 +137,7 @@ void IPU1dma()
 		}
 	}
 
-	IPUProcessInterrupt();
+	CPU_INT(IPU_PROCESS, totalqwc * BIAS);
 
 	IPU_LOG("Completed Call IPU1 DMA QWC Remaining %x Finished %d In Progress %d tadr %x", ipu1ch.qwc, IPU1Status.DMAFinished, IPU1Status.InProgress, ipu1ch.tadr);
 }
@@ -181,6 +181,9 @@ void IPU0dma()
 	}
 
 	IPU_INT_FROM( readsize * BIAS );
+
+	if (ipu0ch.qwc > 0)
+		CPU_INT(IPU_PROCESS, 4);
 }
 
 __fi void dmaIPU0() // fromIPU
@@ -256,6 +259,11 @@ __fi void dmaIPU1() // toIPU
 	}
 }
 
+void ipuCMDProcess()
+{
+	IPUProcessInterrupt();
+}
+
 void ipu0Interrupt()
 {
 	IPU_LOG("ipu0Interrupt: %x", cpuRegs.cycle);

pcsx2/IPU/IPUdma.h

@@ -23,6 +23,7 @@ struct IPUStatus {
 	bool DataRequested;
 };
 
+extern void ipuCMDProcess();
 extern void ipu0Interrupt();
 extern void ipu1Interrupt();
 

pcsx2/R5900.cpp

@@ -297,7 +297,7 @@ static __fi void _cpuTestInterrupts()
 	TESTINT(DMAC_GIF,		gifInterrupt);
 	TESTINT(DMAC_SIF0,		EEsif0Interrupt);
 	TESTINT(DMAC_SIF1,		EEsif1Interrupt);
-	
+	TESTINT(IPU_PROCESS,		ipuCMDProcess);
 	// Profile-guided Optimization (sorta)
 	// The following ints are rarely called.  Encasing them in a conditional
 	// as follows helps speed up most games.

pcsx2/R5900.h

@@ -413,7 +413,8 @@ enum EE_EventType
 	
 	DMAC_GIF_UNIT,
 	VIF_VU0_FINISH,
-	VIF_VU1_FINISH
+	VIF_VU1_FINISH,
+	IPU_PROCESS
 };
 
 extern void CPU_INT( EE_EventType n, s32 ecycle );