patch-2.4.0-test5 linux/drivers/char/drm/gamma_dma.c

• Lines: 74
• Date: Fri Jul 21 12:56:44 2000
• Orig file: v2.4.0-test4/linux/drivers/char/drm/gamma_dma.c
• Orig date: Tue Mar 14 19:10:39 2000

diff -u --recursive --new-file v2.4.0-test4/linux/drivers/char/drm/gamma_dma.c linux/drivers/char/drm/gamma_dma.c
@@ -2,6 +2,7 @@
  * Created: Fri Mar 19 14:30:16 1999 by faith@precisioninsight.com
  *
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
  * All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -24,7 +25,7 @@
  * DEALINGS IN THE SOFTWARE.
  * 
  * Authors:
- *    Rickard E. (Rik) Faith <faith@precisioninsight.com>
+ *    Rickard E. (Rik) Faith <faith@valinux.com>
  *
  */
 
@@ -87,13 +88,31 @@
 	GAMMA_WRITE(GAMMA_DMACOUNT, length / 4);
 }
 
-static inline void gamma_dma_quiescent(drm_device_t *dev)
+static inline void gamma_dma_quiescent_single(drm_device_t *dev)
 {
 	while (GAMMA_READ(GAMMA_DMACOUNT))
 		;
 	while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3)
 		;
+
+	GAMMA_WRITE(GAMMA_FILTERMODE, 1 << 10);
+	GAMMA_WRITE(GAMMA_SYNC, 0);
+	
+	do {
+		while (!GAMMA_READ(GAMMA_OUTFIFOWORDS))
+			;
+	} while (GAMMA_READ(GAMMA_OUTPUTFIFO) != GAMMA_SYNC_TAG);
+}
+
+static inline void gamma_dma_quiescent_dual(drm_device_t *dev)
+{
+	while (GAMMA_READ(GAMMA_DMACOUNT))
+		;
+	while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3)
+		;
+
 	GAMMA_WRITE(GAMMA_BROADCASTMASK, 3);
+
 	GAMMA_WRITE(GAMMA_FILTERMODE, 1 << 10);
 	GAMMA_WRITE(GAMMA_SYNC, 0);
 	
@@ -103,7 +122,6 @@
 			;
 	} while (GAMMA_READ(GAMMA_OUTPUTFIFO) != GAMMA_SYNC_TAG);
 	
-
 				/* Read from second MX */
 	do {
 		while (!GAMMA_READ(GAMMA_OUTFIFOWORDS + 0x10000))
@@ -788,8 +806,13 @@
 	if (!ret) {
 		if (lock.flags & _DRM_LOCK_READY)
 			gamma_dma_ready(dev);
-		if (lock.flags & _DRM_LOCK_QUIESCENT)
-			gamma_dma_quiescent(dev);
+		if (lock.flags & _DRM_LOCK_QUIESCENT) {
+			if (gamma_found() == 1) {
+				gamma_dma_quiescent_single(dev);
+			} else {
+				gamma_dma_quiescent_dual(dev);
+			}
+		}
 	}
 	DRM_DEBUG("%d %s\n", lock.context, ret ? "interrupted" : "has lock");