4.17-stable review patch. If anyone has any objections, please let me know.
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From: Heikki Krogerus heikki.krogerus@linux.intel.com
commit 68816e16b4789f2d05e77b6dcb77564cf5d6a8d8 upstream.
According to UCSI Specification, Connector Change Event only means a change in the Connector Status and Operation Mode fields of the STATUS data structure. So any other change should create another event.
Unfortunately on some platforms the firmware acting as PPM (platform policy manager - usually embedded controller firmware) still does not report any other status changes if there is a connector change event. So if the connector power or data role was changed when a device was plugged to the connector, the driver does not get any indication about that. The port will show wrong roles if that happens.
To fix the issue, always checking the data and power role together with a connector change event.
Fixes: c1b0bc2dabfa ("usb: typec: Add support for UCSI interface") Signed-off-by: Heikki Krogerus heikki.krogerus@linux.intel.com Cc: stable stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/typec/ucsi/ucsi.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
--- a/drivers/usb/typec/ucsi/ucsi.c +++ b/drivers/usb/typec/ucsi/ucsi.c @@ -350,6 +350,19 @@ static void ucsi_connector_change(struct }
if (con->status.change & UCSI_CONSTAT_CONNECT_CHANGE) { + typec_set_pwr_role(con->port, con->status.pwr_dir); + + switch (con->status.partner_type) { + case UCSI_CONSTAT_PARTNER_TYPE_UFP: + typec_set_data_role(con->port, TYPEC_HOST); + break; + case UCSI_CONSTAT_PARTNER_TYPE_DFP: + typec_set_data_role(con->port, TYPEC_DEVICE); + break; + default: + break; + } + if (con->status.connected) ucsi_register_partner(con); else