Hi Guenter > -----Original Message----- > From: Guenter Roeck [mailto:groeck@xxxxxxxxxx] > Sent: Saturday, September 10, 2016 10:23 AM > To: Jun Li <jun.li@xxxxxxx> > Cc: Guenter Roeck <groeck@xxxxxxxxxxxx>; Felipe Balbi > <felipe.balbi@xxxxxxxxxxxxxxx>; Chandra Sekhar Anagani > <chandra.sekhar.anagani@xxxxxxxxx>; Bruce Ashfield > <bruce.ashfield@xxxxxxxxxxxxx>; Bin Gao <bin.gao@xxxxxxxxx>; Pranav Tipnis > <pranav.tipnis@xxxxxxxxx>; Heikki Krogerus > <heikki.krogerus@xxxxxxxxxxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx; linux- > usb@xxxxxxxxxxxxxxx > Subject: Re: [RFC PATCH v3 1/2] usb: typec: USB Type-C Port Manager (tcpm) > > On Fri, Sep 9, 2016 at 5:26 PM, Jun Li <jun.li@xxxxxxx> wrote: > > Hi Guenter, > > > >> -----Original Message----- > >> From: linux-usb-owner@xxxxxxxxxxxxxxx [mailto:linux-usb- > >> owner@xxxxxxxxxxxxxxx] On Behalf Of Guenter Roeck > >> Sent: Wednesday, August 24, 2016 5:11 AM > >> To: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> > >> Cc: Chandra Sekhar Anagani <chandra.sekhar.anagani@xxxxxxxxx>; Bruce > >> Ashfield <bruce.ashfield@xxxxxxxxxxxxx>; Bin Gao <bin.gao@xxxxxxxxx>; > >> Pranav Tipnis <pranav.tipnis@xxxxxxxxx>; Heikki Krogerus > >> <heikki.krogerus@xxxxxxxxxxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx; > >> linux- usb@xxxxxxxxxxxxxxx; Guenter Roeck <groeck@xxxxxxxxxxxx> > >> Subject: [RFC PATCH v3 1/2] usb: typec: USB Type-C Port Manager > >> (tcpm) > >> > >> This driver implements the USB Type-C Power Delivery state machine > >> for both source and sink ports. Alternate mode support is not fully > >> implemented. > >> > >> The driver attaches to the USB Type-C class code implemented in the > >> following patches. > >> > >> usb: typec: add driver for Intel Whiskey Cove PMIC USB Type-C PHY > >> usb: USB Type-C connector class > >> > >> This driver only implements the state machine. Lower level drivers > >> are responsible for > >> - Reporting VBUS status and activating VBUS > >> - Setting CC lines and providing CC line status > >> - Setting line polarity > >> - Activating and deactivating VCONN > >> - Setting the current limit > >> - Activating and deactivating PD message transfers > >> - Sending and receiving PD messages > >> > >> The driver provides both a functional API as well as callbacks for > >> lower level drivers. > >> > >> Signed-off-by: Guenter Roeck <groeck@xxxxxxxxxxxx> > >> --- > > > > A specific question, if power sink wants to request a new power level > > after SNK_READY, how to handle it with this tcpm? > > > > So far I have considered the required power level to be static, based on > our curent implementations. That should be easy to change, though, with an > additional API function, to be called from a low level driver. > Do you have that requirement, and would such a function meet your needs ? > So you are going to make port->tcpc->config to be dynamic to meet my need? Li Jun > Thanks, > Guenter ��.n��������+%������w��{.n�����{���)�� jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
