The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

Possible dependencies:

99f6d4361113 ("usb: typec: ucsi: Check the connection on resume") 512df95b9432 ("usb: typec: ucsi: Better fix for missing unplug events issue") bd19ac98f77e ("usb: typec: ucsi: Read the PDOs in separate work") 6cbe4b2d5a3f ("usb: typec: ucsi: Check the partner alt modes always if there is PD contract") b9aa02ca39a4 ("usb: typec: ucsi: Add polling mechanism for partner tasks like alt mode checking")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 99f6d43611135bd6f211dec9e88bb41e4167e304 Mon Sep 17 00:00:00 2001 From: Heikki Krogerus heikki.krogerus@linux.intel.com Date: Fri, 7 Oct 2022 13:09:50 +0300 Subject: [PATCH] usb: typec: ucsi: Check the connection on resume

Checking the connection status of every port on resume. This fixes an issue where the partner device is not unregistered properly after resume if it was unplugged while the system was suspended.

The function ucsi_check_connection() is also modified so that it can be used also for registering the connection on top of unregistering it.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=210425 Fixes: a94ecde41f7e ("usb: typec: ucsi: ccg: enable runtime pm support") Cc: stable@vger.kernel.org Signed-off-by: Heikki Krogerus heikki.krogerus@linux.intel.com Link: https://lore.kernel.org/r/20221007100951.43798-2-heikki.krogerus@linux.intel... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c index 74fb5a4c6f21..a7987fc764cc 100644 --- a/drivers/usb/typec/ucsi/ucsi.c +++ b/drivers/usb/typec/ucsi/ucsi.c @@ -183,16 +183,6 @@ int ucsi_send_command(struct ucsi *ucsi, u64 command, } EXPORT_SYMBOL_GPL(ucsi_send_command);

-int ucsi_resume(struct ucsi *ucsi) -{ - u64 command; - - /* Restore UCSI notification enable mask after system resume */ - command = UCSI_SET_NOTIFICATION_ENABLE | ucsi->ntfy; - - return ucsi_send_command(ucsi, command, NULL, 0); -} -EXPORT_SYMBOL_GPL(ucsi_resume); /* -------------------------------------------------------------------------- */

struct ucsi_work { @@ -744,6 +734,7 @@ static void ucsi_partner_change(struct ucsi_connector *con)

static int ucsi_check_connection(struct ucsi_connector *con) { + u8 prev_flags = con->status.flags; u64 command; int ret;

@@ -754,10 +745,13 @@ static int ucsi_check_connection(struct ucsi_connector *con) return ret; }

+ if (con->status.flags == prev_flags) + return 0; + if (con->status.flags & UCSI_CONSTAT_CONNECTED) { - if (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) == - UCSI_CONSTAT_PWR_OPMODE_PD) - ucsi_partner_task(con, ucsi_check_altmodes, 30, 0); + ucsi_register_partner(con); + ucsi_pwr_opmode_change(con); + ucsi_partner_change(con); } else { ucsi_partner_change(con); ucsi_port_psy_changed(con); @@ -1276,6 +1270,28 @@ static int ucsi_init(struct ucsi *ucsi) return ret; }

+int ucsi_resume(struct ucsi *ucsi) +{ + struct ucsi_connector *con; + u64 command; + int ret; + + /* Restore UCSI notification enable mask after system resume */ + command = UCSI_SET_NOTIFICATION_ENABLE | ucsi->ntfy; + ret = ucsi_send_command(ucsi, command, NULL, 0); + if (ret < 0) + return ret; + + for (con = ucsi->connector; con->port; con++) { + mutex_lock(&con->lock); + ucsi_check_connection(con); + mutex_unlock(&con->lock); + } + + return 0; +} +EXPORT_SYMBOL_GPL(ucsi_resume); + static void ucsi_init_work(struct work_struct *work) { struct ucsi *ucsi = container_of(work, struct ucsi, work.work);