1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_cp.c b/drivers/gpu/drm/radeon/radeon_cp.c
index d8356827ef17..7a52c461145c 100644
--- a/drivers/gpu/drm/radeon/radeon_cp.c
+++ b/drivers/gpu/drm/radeon/radeon_cp.c
@@ -406,6 +406,15 @@ static void radeon_init_pipes(drm_radeon_private_t *dev_priv)
 {
         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);