| Message ID | 20210407200723.1914388-1-badhri@google.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2,1/6] usb: typec: tcpm: Address incorrect values of tcpm psy for fixed supply | expand |
On Wed, Apr 07, 2021 at 01:07:18PM -0700, Badhri Jagan Sridharan wrote: > tcpm_pd_build_request overwrites current_limit and supply_voltage > even before port partner accepts the requests. This leaves stale > values in current_limit and supply_voltage that get exported by > "tcpm-source-psy-". Solving this problem by caching the request > values of current limit/supply voltage in req_current_limit > and req_supply_voltage. current_limit/supply_voltage gets updated > once the port partner accepts the request. > > Fixes: f2a8aa053c176 ("typec: tcpm: Represent source supply through power_supply") > Signed-off-by: Badhri Jagan Sridharan <badhri@google.com> > Reviewed-by: Guenter Roeck <linux@roeck-us.net> > Reviewed-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> > --- > Changes since V1: > * Fixed typo as suggested by Guenter Roeck. > * Added Reviewed-by tags. > --- > drivers/usb/typec/tcpm/tcpm.c | 17 ++++++++++------- > 1 file changed, 10 insertions(+), 7 deletions(-) > > diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c > index ca1fc77697fc..4ea4b30ae885 100644 > --- a/drivers/usb/typec/tcpm/tcpm.c > +++ b/drivers/usb/typec/tcpm/tcpm.c > @@ -389,7 +389,10 @@ struct tcpm_port { > unsigned int operating_snk_mw; > bool update_sink_caps; > > - /* Requested current / voltage */ > + /* Requested current / voltage to the port partner */ > + u32 req_current_limit; > + u32 req_supply_voltage; > + /* Actual current / voltage limit of the local port */ > u32 current_limit; > u32 supply_voltage; > > @@ -2435,8 +2438,8 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port, > case SNK_TRANSITION_SINK: > if (port->vbus_present) { > tcpm_set_current_limit(port, > - port->current_limit, > - port->supply_voltage); > + port->req_current_limit, > + port->req_supply_voltage); > port->explicit_contract = true; > tcpm_set_auto_vbus_discharge_threshold(port, > TYPEC_PWR_MODE_PD, > @@ -2545,8 +2548,8 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port, > break; > case SNK_NEGOTIATE_PPS_CAPABILITIES: > port->pps_data.active = true; > - port->supply_voltage = port->pps_data.out_volt; > - port->current_limit = port->pps_data.op_curr; > + port->req_supply_voltage = port->pps_data.out_volt; > + port->req_current_limit = port->pps_data.op_curr; > tcpm_set_state(port, SNK_TRANSITION_SINK, 0); > break; > case SOFT_RESET_SEND: > @@ -3195,8 +3198,8 @@ static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo) > flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); > } > > - port->current_limit = ma; > - port->supply_voltage = mv; > + port->req_current_limit = ma; > + port->req_supply_voltage = mv; > > return 0; > } > -- > 2.31.1.295.g9ea45b61b8-goog
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index ca1fc77697fc..4ea4b30ae885 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -389,7 +389,10 @@ struct tcpm_port { unsigned int operating_snk_mw; bool update_sink_caps; - /* Requested current / voltage */ + /* Requested current / voltage to the port partner */ + u32 req_current_limit; + u32 req_supply_voltage; + /* Actual current / voltage limit of the local port */ u32 current_limit; u32 supply_voltage; @@ -2435,8 +2438,8 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port, case SNK_TRANSITION_SINK: if (port->vbus_present) { tcpm_set_current_limit(port, - port->current_limit, - port->supply_voltage); + port->req_current_limit, + port->req_supply_voltage); port->explicit_contract = true; tcpm_set_auto_vbus_discharge_threshold(port, TYPEC_PWR_MODE_PD, @@ -2545,8 +2548,8 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port, break; case SNK_NEGOTIATE_PPS_CAPABILITIES: port->pps_data.active = true; - port->supply_voltage = port->pps_data.out_volt; - port->current_limit = port->pps_data.op_curr; + port->req_supply_voltage = port->pps_data.out_volt; + port->req_current_limit = port->pps_data.op_curr; tcpm_set_state(port, SNK_TRANSITION_SINK, 0); break; case SOFT_RESET_SEND: @@ -3195,8 +3198,8 @@ static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo) flags & RDO_CAP_MISMATCH ? " [mismatch]" : ""); } - port->current_limit = ma; - port->supply_voltage = mv; + port->req_current_limit = ma; + port->req_supply_voltage = mv; return 0; }
tcpm_pd_build_request overwrites current_limit and supply_voltage even before port partner accepts the requests. This leaves stale values in current_limit and supply_voltage that get exported by "tcpm-source-psy-". Solving this problem by caching the request values of current limit/supply voltage in req_current_limit and req_supply_voltage. current_limit/supply_voltage gets updated once the port partner accepts the request. Fixes: f2a8aa053c176 ("typec: tcpm: Represent source supply through power_supply") Signed-off-by: Badhri Jagan Sridharan <badhri@google.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com> --- Changes since V1: * Fixed typo as suggested by Guenter Roeck. * Added Reviewed-by tags. --- drivers/usb/typec/tcpm/tcpm.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-)