On Fri, 2021-07-09 at 15:57 +0900, Chanho Park wrote: > We divide this M-HCI as PH(Physical Host) and VHs(Virtual Host). The > PH > > supports all UFSHCI functions(all SAPs) same as conventional UFSHCI > but > > the VH only supports data transfer function. Thus, except UTP_CMD_SAP > and > > UTP_TMPSAP, the PH should handle all the physical features. Hi Chanho park, You mentioned this in your coverletter: "There are two types of host controllers on the UFS host controller that we designed. The UFS device has a Function Arbitor that arranges commands of each host. When each host transmits a command to the Arbitor, the Arbitor transmits it to the UTP layer". where does this "Function Arbitor" exit? From your comments, seems it exists on the UFS device side? right? If this is true, where is related code in your patch?? Maybe you only submited partial of your real driver parch for this controller?? Bean