panfrost: Invoke compute shader according to grid info

We already have helpers for packing invocations (due to its role in
instanced vertex shaders), so we can reuse this drop in for compute
shaders.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>

src/gallium/drivers/panfrost/pan_compute.c

@@ -85,6 +85,12 @@ panfrost_launch_grid(struct pipe_context *pipe,
         payload->postfix.framebuffer =
                 panfrost_upload_transient(ctx, &compute_fbd, sizeof(compute_fbd));
 
+        /* Invoke according to the grid info */
+
+        panfrost_pack_work_groups_compute(&payload->prefix,
+                        info->grid[0], info->grid[1], info->grid[2],
+                        info->block[0], info->block[1], info->block[2]);
+
         /* Upload the payload */
 
         struct panfrost_transfer transfer = panfrost_allocate_transient(ctx, sizeof(job) + sizeof(*payload));