diff options
| author | Guan-Yu Lin <guanyulin@google.com> | 2023-11-16 16:32:16 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-11-23 12:32:43 +0000 |
| commit | e0cc05d52ad310cced029449bcda0f9fc847097c (patch) | |
| tree | d470ed7d4d6f4dbf07073cad493aed6d2ea0de9e /drivers/usb/typec/tcpm/tcpm.c | |
| parent | 9768af12edb3b23cfa1f7c05e019115b73f9490c (diff) | |
usb: typec: tcpm: skip checking port->send_discover in PD3.0
The original Collison Avoidance mechanism, port->send_discover, avoids
the conflict when port partners start AMS almost the same time. However,
this mechanism is replaced by SINK_TX_OK and SINK_TX_NG. Skip the check
in PD3.0 to avoid the deadlock when source is requesting DR_SWAP where
sink is requesting DISCOVER_IDENTITY.
Signed-off-by: Guan-Yu Lin <guanyulin@google.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20231116083221.1201892-1-guanyulin@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/typec/tcpm/tcpm.c')
| -rw-r--r-- | drivers/usb/typec/tcpm/tcpm.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 058d5b853b57..ff3c171a3a75 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -2847,7 +2847,7 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS); } else { - if (port->send_discover) { + if (port->send_discover && port->negotiated_rev < PD_REV30) { tcpm_queue_message(port, PD_MSG_CTRL_WAIT); break; } @@ -2863,7 +2863,7 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port, PD_MSG_CTRL_NOT_SUPP, NONE_AMS); } else { - if (port->send_discover) { + if (port->send_discover && port->negotiated_rev < PD_REV30) { tcpm_queue_message(port, PD_MSG_CTRL_WAIT); break; } @@ -2872,7 +2872,7 @@ static void tcpm_pd_ctrl_request(struct tcpm_port *port, } break; case PD_CTRL_VCONN_SWAP: - if (port->send_discover) { + if (port->send_discover && port->negotiated_rev < PD_REV30) { tcpm_queue_message(port, PD_MSG_CTRL_WAIT); break; } |