drm: radeon: Use RADEON_RB3D_DSTCACHE_CTLSTAT instead of RADEON_RB2D_DSTCACHE_CTLSTAT.

The latter seems to be a read-only mirror of the former.
Signed-off-by: Dave Airlie <airlied@linux.ie>

drivers/char/drm/radeon_cp.c

@@ -864,13 +864,13 @@ static int radeon_do_pixcache_flush(drm_radeon_private_t * dev_priv)
 
 	dev_priv->stats.boxes |= RADEON_BOX_WAIT_IDLE;
 
-	tmp = RADEON_READ(RADEON_RB2D_DSTCACHE_CTLSTAT);
-	tmp |= RADEON_RB2D_DC_FLUSH_ALL;
-	RADEON_WRITE(RADEON_RB2D_DSTCACHE_CTLSTAT, tmp);
+	tmp = RADEON_READ(RADEON_RB3D_DSTCACHE_CTLSTAT);
+	tmp |= RADEON_RB3D_DC_FLUSH_ALL;
+	RADEON_WRITE(RADEON_RB3D_DSTCACHE_CTLSTAT, tmp);
 
 	for (i = 0; i < dev_priv->usec_timeout; i++) {
-		if (!(RADEON_READ(RADEON_RB2D_DSTCACHE_CTLSTAT)
-		      & RADEON_RB2D_DC_BUSY)) {
+		if (!(RADEON_READ(RADEON_RB3D_DSTCACHE_CTLSTAT)
+		      & RADEON_RB3D_DC_BUSY)) {
 			return 0;
 		}
 		DRM_UDELAY(1);

drivers/char/drm/radeon_drv.h

@@ -545,6 +545,11 @@ extern int r300_do_cp_cmdbuf(drm_device_t * dev, DRMFILE filp,
 #	define RADEON_RB3D_ZC_FREE		(1 << 2)
 #	define RADEON_RB3D_ZC_FLUSH_ALL		0x5
 #	define RADEON_RB3D_ZC_BUSY		(1 << 31)
+#define RADEON_RB3D_DSTCACHE_CTLSTAT	0x325c
+#	define RADEON_RB3D_DC_FLUSH		(3 << 0)
+#	define RADEON_RB3D_DC_FREE		(3 << 2)
+#	define RADEON_RB3D_DC_FLUSH_ALL		0xf
+#	define RADEON_RB3D_DC_BUSY		(1 << 31)
 #define RADEON_RB3D_ZSTENCILCNTL	0x1c2c
 #	define RADEON_Z_TEST_MASK		(7 << 4)
 #	define RADEON_Z_TEST_ALWAYS		(7 << 4)
@@ -987,12 +992,12 @@ do {									\
 } while (0)
 
 #define RADEON_FLUSH_CACHE() do {					\
-	OUT_RING( CP_PACKET0( RADEON_RB2D_DSTCACHE_CTLSTAT, 0 ) );	\
+	OUT_RING( CP_PACKET0( RADEON_RB3D_DSTCACHE_CTLSTAT, 0 ) );	\
 	OUT_RING( RADEON_RB2D_DC_FLUSH );				\
 } while (0)
 
 #define RADEON_PURGE_CACHE() do {					\
-	OUT_RING( CP_PACKET0( RADEON_RB2D_DSTCACHE_CTLSTAT, 0 ) );	\
+	OUT_RING( CP_PACKET0( RADEON_RB3D_DSTCACHE_CTLSTAT, 0 ) );	\
 	OUT_RING( RADEON_RB2D_DC_FLUSH_ALL );				\
 } while (0)