panfrost/decode: Wait for a job to finish before dumping

Then we can get some information back about any exception that might
have happened.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>

src/gallium/drivers/panfrost/pan_drm.c

@@ -231,9 +231,11 @@ panfrost_drm_submit_job(struct panfrost_context *ctx, u64 job_desc, int reqs, st
 	}
 
         /* Trace the job if we're doing that */
-
-        if (pan_debug & PAN_DBG_TRACE)
+        if (pan_debug & PAN_DBG_TRACE) {
+                /* Wait so we can get errors reported back */
+                drmSyncobjWait(screen->fd, &ctx->out_sync, 1, INT64_MAX, 0, NULL);
                 pandecode_replay_jc(submit.jc, FALSE);
+        }
 
 	return 0;
 }