From 56277035c294ec4877aabc97febcf55a2b3ef397 Mon Sep 17 00:00:00 2001
From: Badhri Jagan Sridharan <badhri@google.com>
Date: Mon, 28 Aug 2017 10:23:22 -0700
Subject: [PATCH] staging: typec: tcpm: Switch to PORT_RESET instead of
 SNK_UNATTACHED
Git-commit: 56277035c294ec4877aabc97febcf55a2b3ef397
References: FATE#326325
Patch-mainline: v4.14

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>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
 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 cbfb1a49344f..2ce02aba039a 100644
--- a/drivers/staging/typec/tcpm.c
+++ b/drivers/staging/typec/tcpm.c
@@ -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:
-- 
2.16.4