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USB: typec: tcpm: Hard Reset after not receiving a Request 

PD 3.0 spec 8.3.3.2.3, A Get_Source_Cap message is sent
to a UUT that is in the PE_SRC_Ready state. After sending
a Source_Capabilities message, the UUT should then expect
a Request message in response. When one is not received,
the UUT should timeout to PE_SRC_Hard_Reset.

Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Badhri Jagan Sridharan <badhri@google.com>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: pumahsu <pumahsu@google.com>
Signed-off-by: Kyle Tso <kyletso@google.com>
Signed-off-by: Will McVicker <willmcvicker@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20201210160521.3417426-3-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
pumahsu 2020-12-10 17:05:18 +01:00 committed by Greg Kroah-Hartman
parent 8704fd73bf
commit 60e998d1c6
1 changed files with 11 additions and 1 deletions
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12
drivers/usb/typec/tcpm/tcpm.c
View File

@ -2228,6 +2228,7 @@ static int tcpm_pd_send_control(struct tcpm_port *port,
static bool tcpm_send_queued_message(struct tcpm_port *port) static bool tcpm_send_queued_message(struct tcpm_port *port)
{ {
enum pd_msg_request queued_message; enum pd_msg_request queued_message;
int ret;
do { do {
queued_message = port->queued_message; queued_message = port->queued_message;
@ -2247,7 +2248,16 @@ static bool tcpm_send_queued_message(struct tcpm_port *port)
tcpm_pd_send_sink_caps(port); tcpm_pd_send_sink_caps(port);
break; break;
case PD_MSG_DATA_SOURCE_CAP: case PD_MSG_DATA_SOURCE_CAP:
tcpm_pd_send_source_caps(port); ret = tcpm_pd_send_source_caps(port);
if (ret < 0) {
tcpm_log(port,
"Unable to send src caps, ret=%d",
ret);
tcpm_set_state(port, SOFT_RESET_SEND, 0);
} else if (port->pwr_role == TYPEC_SOURCE) {
tcpm_set_state(port, HARD_RESET_SEND,
PD_T_SENDER_RESPONSE);
}
break; break;
default: default:
break; break;