GEN9_PCODE_READ_MEM_LATENCY
ret = intel_pcode_read(display->drm, GEN9_PCODE_READ_MEM_LATENCY, &val, NULL);
ret = intel_pcode_read(display->drm, GEN9_PCODE_READ_MEM_LATENCY, &val, NULL);
case GEN9_PCODE_READ_MEM_LATENCY: