iris: update comment

diff --git a/src/gallium/drivers/iris/iris_draw.c b/src/gallium/drivers/iris/iris_draw.c
index cf9d3c638330b9a97a7255f4806c8eb3b8bc11ad..a5b4c63d54f8a71a595ac2ba38f50771d56fad51 100644 (file)
--- a/src/gallium/drivers/iris/iris_draw.c
+++ b/src/gallium/drivers/iris/iris_draw.c
@@ -168,5 +168,7 @@ iris_launch_grid(struct pipe_context *ctx, const struct pipe_grid_info *grid)
 
    ice->state.dirty &= ~IRIS_ALL_DIRTY_FOR_COMPUTE;
 
-   // XXX: postdraw resolve tracking
+   /* Note: since compute shaders can't access the framebuffer, there's
+    * no need to call iris_postdraw_update_resolve_tracking.
+    */
 }