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

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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>
This commit is contained in:
Badhri Jagan Sridharan 2017-08-28 10:23:22 -07:00 committed by Greg Kroah-Hartman
parent f451ac9e4c
commit 56277035c2
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/typec/tcpm.c
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@ -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: