radeong: flush when changing tiling flags of BO referenced by CS

diff --git a/src/gallium/winsys/drm/radeon/core/radeon_buffer.c b/src/gallium/winsys/drm/radeon/core/radeon_buffer.c
index 3b1c386..5cbf0dd 100644 (file)
--- a/src/gallium/winsys/drm/radeon/core/radeon_buffer.c
+++ b/src/gallium/winsys/drm/radeon/core/radeon_buffer.c
@@ -217,9 +217,10 @@ static void radeon_buffer_set_tiling(struct radeon_winsys *ws,
                                      boolean microtiled,
                                      boolean macrotiled)
 {
+    struct radeon_winsys_priv *priv = ((struct radeon_winsys *)ws)->priv;
     struct radeon_pipe_buffer *radeon_buffer =
         (struct radeon_pipe_buffer*)buffer;
-    uint32_t flags = 0;
+    uint32_t flags = 0, old_flags, old_pitch;
 
     if (microtiled) {
         flags |= RADEON_BO_FLAGS_MICRO_TILE;
@@ -228,7 +229,17 @@ static void radeon_buffer_set_tiling(struct radeon_winsys *ws,
         flags |= RADEON_BO_FLAGS_MACRO_TILE;
     }
 
-    radeon_bo_set_tiling(radeon_buffer->bo, flags, pitch);
+    radeon_bo_get_tiling(radeon_buffer->bo, &old_flags, &old_pitch);
+
+    if (flags != old_flags || pitch != old_pitch) {
+        /* Tiling determines how DRM treats the buffer data.
+         * We must flush CS when changing it if the buffer is referenced. */
+        if (radeon_bo_is_referenced_by_cs(radeon_buffer->bo, priv->cs)) {
+            priv->flush_cb(priv->flush_data);
+        }
+
+        radeon_bo_set_tiling(radeon_buffer->bo, flags, pitch);
+    }
 }
 
 static void radeon_fence_reference(struct pipe_winsys *ws,