get_output_select_source
if (get_output_select_source(dest, dev) != CR_CHAN(src))
current_src = get_output_select_source(dest, dev);
if (get_output_select_source(dest, dev) != CR_CHAN(src))
if (get_output_select_source(dest, dev) != CR_CHAN(src))
current_src = get_output_select_source(dest, dev);
if (get_output_select_source(dest, dev) != src)