On Sat, Aug 26, 2017 at 11:52:33PM -0700, Badhri Jagan Sridharan wrote: > When VBUS is not discovered within PD_T_PS_SOURCE_ON although Rp > is detected on CC, TCPM switches the port to SNK_UNATTACHED > state. SNK_UNATTACHED, however does not force TYPEC_CC_OPEN which > makes the partner(source) to think that it is connected. > > To overcome this issue, force the port into PORT_RESET state > to make sure the CC lines are open. > > Signed-off-by: Badhri Jagan Sridharan <Badhri@xxxxxxxxxx> Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx> > --- > drivers/staging/typec/tcpm.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/staging/typec/tcpm.c b/drivers/staging/typec/tcpm.c > index 9e0111dea7c4..47b8fec5ea36 100644 > --- a/drivers/staging/typec/tcpm.c > +++ b/drivers/staging/typec/tcpm.c > @@ -2380,7 +2380,7 @@ static void run_state_machine(struct tcpm_port *port) > 0); > else > /* Wait for VBUS, but not forever */ > - tcpm_set_state(port, SNK_UNATTACHED, PD_T_PS_SOURCE_ON); > + tcpm_set_state(port, PORT_RESET, PD_T_PS_SOURCE_ON); > break; > > case SRC_TRY: > -- > 2.14.1.342.g6490525c54-goog > _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
