Commit 56277035 authored Aug 28, 2017 by Badhri Jagan Sridharan Committed by Greg Kroah-Hartman Aug 29, 2017

staging: typec: tcpm: Switch to PORT_RESET instead of SNK_UNATTACHED



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@google.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent f451ac9e

drivers/staging/typec/tcpm.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2385,7 +2385,7 @@ 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: