From f451ac9e4c6dd2c9ee5397a28a60084fc77f63d7 Mon Sep 17 00:00:00 2001
From: Badhri Jagan Sridharan <badhri@google.com>
Date: Mon, 28 Aug 2017 10:23:21 -0700
Subject: [PATCH] staging: typec: tcpm: Do not send PING msgs in TCPM
Git-commit: f451ac9e4c6dd2c9ee5397a28a60084fc77f63d7
References: FATE#326325
Patch-mainline: v4.14
PING messages are used to monitor the connect/disconnect.
However, when PD is carried over CC, so this is not required.
Also, the spec does not clearly say if PD is possible when
Type-c is connected to Type-A/B. So, removing sending
PING messages altogether.
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 | 11 ++++-------
1 file changed, 4 insertions(+), 7 deletions(-)
diff --git a/drivers/staging/typec/tcpm.c b/drivers/staging/typec/tcpm.c
index 36a70989d3cd..cbfb1a49344f 100644
--- a/drivers/staging/typec/tcpm.c
+++ b/drivers/staging/typec/tcpm.c
@@ -2340,14 +2340,11 @@ static void run_state_machine(struct tcpm_port *port)
* - The system is not operating in PD mode
* or
* - Both partners are connected using a Type-C connector
- * XXX How do we know that ?
+ *
+ * There is no actual need to send PD messages since the local
+ * port type-c and the spec does not clearly say whether PD is
+ * possible when type-c is connected to Type-A/B
*/
- if (port->pwr_opmode == TYPEC_PWR_MODE_PD &&
- !port->op_vsafe5v) {
- tcpm_pd_send_control(port, PD_CTRL_PING);
- tcpm_set_state_cond(port, SRC_READY,
- PD_T_SOURCE_ACTIVITY);
- }
break;
case SRC_WAIT_NEW_CAPABILITIES:
/* Nothing to do... */
--
2.16.4