if (rt711->first_hw_init) {
                regcache_cache_only(rt711->regmap, false);
                regcache_cache_bypass(rt711->regmap, true);
+               regcache_cache_only(rt711->mbq_regmap, false);
+               regcache_cache_bypass(rt711->mbq_regmap, true);
        } else {
                /*
                 * PM runtime is only enabled when a Slave reports as Attached
        if (rt711->first_hw_init) {
                regcache_cache_bypass(rt711->regmap, false);
                regcache_mark_dirty(rt711->regmap);
+               regcache_cache_bypass(rt711->mbq_regmap, false);
+               regcache_mark_dirty(rt711->mbq_regmap);
        } else
                rt711->first_hw_init = true;