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staging: typec: tcpm: Do not send PING msgs in TCPM

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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>
This commit is contained in:
Badhri Jagan Sridharan 2017-08-28 10:23:21 -07:00 committed by Greg Kroah-Hartman
parent b965b6317f
commit f451ac9e4c
1 changed files with 4 additions and 7 deletions
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11
drivers/staging/typec/tcpm.c
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@ -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... */