diff --git a/drivers/gpu/drm/radeon/r300.c b/drivers/gpu/drm/radeon/r300.c
index c47579d..053f4ec 100644
--- a/drivers/gpu/drm/radeon/r300.c
+++ b/drivers/gpu/drm/radeon/r300.c
@@ -448,6 +448,7 @@
 		/* rv350,rv370,rv380 */
 		rdev->num_gb_pipes = 1;
 	}
+	rdev->num_z_pipes = 1;
 	gb_tile_config = (R300_ENABLE_TILING | R300_TILE_SIZE_16);
 	switch (rdev->num_gb_pipes) {
 	case 2:
@@ -486,7 +487,8 @@
 		printk(KERN_WARNING "Failed to wait MC idle while "
 		       "programming pipes. Bad things might happen.\n");
 	}
-	DRM_INFO("radeon: %d pipes initialized.\n", rdev->num_gb_pipes);
+	DRM_INFO("radeon: %d quad pipes, %d Z pipes initialized.\n",
+		 rdev->num_gb_pipes, rdev->num_z_pipes);
 }
 
 int r300_ga_reset(struct radeon_device *rdev)
diff --git a/drivers/gpu/drm/radeon/r420.c b/drivers/gpu/drm/radeon/r420.c
index dea497a..97426a6 100644
--- a/drivers/gpu/drm/radeon/r420.c
+++ b/drivers/gpu/drm/radeon/r420.c
@@ -165,7 +165,18 @@
 		printk(KERN_WARNING "Failed to wait GUI idle while "
 		       "programming pipes. Bad things might happen.\n");
 	}
-	DRM_INFO("radeon: %d pipes initialized.\n", rdev->num_gb_pipes);
+
+	if (rdev->family == CHIP_RV530) {
+		tmp = RREG32(RV530_GB_PIPE_SELECT2);
+		if ((tmp & 3) == 3)
+			rdev->num_z_pipes = 2;
+		else
+			rdev->num_z_pipes = 1;
+	} else
+		rdev->num_z_pipes = 1;
+
+	DRM_INFO("radeon: %d quad pipes, %d z pipes initialized.\n",
+		 rdev->num_gb_pipes, rdev->num_z_pipes);
 }
 
 void r420_gpu_init(struct radeon_device *rdev)
diff --git a/drivers/gpu/drm/radeon/r520.c b/drivers/gpu/drm/radeon/r520.c
index 09fb0b6..ebd6b0f 100644
--- a/drivers/gpu/drm/radeon/r520.c
+++ b/drivers/gpu/drm/radeon/r520.c
@@ -177,7 +177,6 @@
 	 */
 	/* workaround for RV530 */
 	if (rdev->family == CHIP_RV530) {
-		WREG32(0x4124, 1);
 		WREG32(0x4128, 0xFF);
 	}
 	r420_pipes_init(rdev);
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 79ad982..b519fb2 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -655,6 +655,7 @@
 	int				usec_timeout;
 	enum radeon_pll_errata		pll_errata;
 	int				num_gb_pipes;
+	int				num_z_pipes;
 	int				disp_priority;
 	/* BIOS */
 	uint8_t				*bios;
diff --git a/drivers/gpu/drm/radeon/radeon_cp.c b/drivers/gpu/drm/radeon/radeon_cp.c
index d835682..7a52c46 100644
--- a/drivers/gpu/drm/radeon/radeon_cp.c
+++ b/drivers/gpu/drm/radeon/radeon_cp.c
@@ -406,6 +406,15 @@
 {
 	uint32_t gb_tile_config, gb_pipe_sel = 0;
 
+	if ((dev_priv->flags & RADEON_FAMILY_MASK) == CHIP_RV530) {
+		uint32_t z_pipe_sel = RADEON_READ(RV530_GB_PIPE_SELECT2);
+		if ((z_pipe_sel & 3) == 3)
+			dev_priv->num_z_pipes = 2;
+		else
+			dev_priv->num_z_pipes = 1;
+	} else
+		dev_priv->num_z_pipes = 1;
+
 	/* RS4xx/RS6xx/R4xx/R5xx */
 	if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R420) {
 		gb_pipe_sel = RADEON_READ(R400_GB_PIPE_SELECT);
diff --git a/drivers/gpu/drm/radeon/radeon_drv.h b/drivers/gpu/drm/radeon/radeon_drv.h
index 3933f82..6fa32da 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.h
+++ b/drivers/gpu/drm/radeon/radeon_drv.h
@@ -100,9 +100,10 @@
  * 1.28- Add support for VBL on CRTC2
  * 1.29- R500 3D cmd buffer support
  * 1.30- Add support for occlusion queries
+ * 1.31- Add support for num Z pipes from GET_PARAM
  */
 #define DRIVER_MAJOR		1
-#define DRIVER_MINOR		30
+#define DRIVER_MINOR		31
 #define DRIVER_PATCHLEVEL	0
 
 /*
@@ -329,6 +330,7 @@
 	resource_size_t fb_aper_offset;
 
 	int num_gb_pipes;
+	int num_z_pipes;
 	int track_flush;
 	drm_local_map_t *mmio;
 
@@ -689,6 +691,7 @@
 
 /* pipe config regs */
 #define R400_GB_PIPE_SELECT             0x402c
+#define RV530_GB_PIPE_SELECT2           0x4124
 #define R500_DYN_SCLK_PWMEM_PIPE        0x000d /* PLL */
 #define R300_GB_TILE_CONFIG             0x4018
 #       define R300_ENABLE_TILING       (1 << 0)
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 11ed672..dce09ad 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -95,6 +95,9 @@
 	case RADEON_INFO_NUM_GB_PIPES:
 		value = rdev->num_gb_pipes;
 		break;
+	case RADEON_INFO_NUM_Z_PIPES:
+		value = rdev->num_z_pipes;
+		break;
 	default:
 		DRM_DEBUG("Invalid request %d\n", info->request);
 		return -EINVAL;
diff --git a/drivers/gpu/drm/radeon/radeon_reg.h b/drivers/gpu/drm/radeon/radeon_reg.h
index 5834497..4df43f6 100644
--- a/drivers/gpu/drm/radeon/radeon_reg.h
+++ b/drivers/gpu/drm/radeon/radeon_reg.h
@@ -3574,4 +3574,6 @@
 #define RADEON_SCRATCH_REG4		0x15f0
 #define RADEON_SCRATCH_REG5		0x15f4
 
+#define RV530_GB_PIPE_SELECT2           0x4124
+
 #endif
diff --git a/drivers/gpu/drm/radeon/radeon_state.c b/drivers/gpu/drm/radeon/radeon_state.c
index 46645f3..2882f40 100644
--- a/drivers/gpu/drm/radeon/radeon_state.c
+++ b/drivers/gpu/drm/radeon/radeon_state.c
@@ -3081,6 +3081,9 @@
 	case RADEON_PARAM_NUM_GB_PIPES:
 		value = dev_priv->num_gb_pipes;
 		break;
+	case RADEON_PARAM_NUM_Z_PIPES:
+		value = dev_priv->num_z_pipes;
+		break;
 	default:
 		DRM_DEBUG("Invalid parameter %d\n", param->param);
 		return -EINVAL;