dce_v6_0_latency_watermark
if (dce_v6_0_latency_watermark(wm) <= latency_hiding)
latency_watermark_a = min_t(u32, dce_v6_0_latency_watermark(&wm_high), 65535);
latency_watermark_b = min_t(u32, dce_v6_0_latency_watermark(&wm_low), 65535);