A manual EC sysjump will restart the PPM and break communication with
the UCSI driver by disabling notifications in the initial PPM state.
Update cros_ec_ucsi to listen for PPM init events and treat them as a
system resume to re-establish communication with the PPM (ChromeOS EC).
Signed-off-by: Jameson Thies <jthies@xxxxxxxxxx>
---
drivers/usb/typec/ucsi/cros_ec_ucsi.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/drivers/usb/typec/ucsi/cros_ec_ucsi.c b/drivers/usb/typec/ucsi/cros_ec_ucsi.c
index c605c8616726..5f17fcbda059 100644
--- a/drivers/usb/typec/ucsi/cros_ec_ucsi.c
+++ b/drivers/usb/typec/ucsi/cros_ec_ucsi.c
@@ -205,12 +205,19 @@ static int cros_ucsi_event(struct notifier_block *nb,
{
struct cros_ucsi_data *udata = container_of(nb, struct cros_ucsi_data, nb);
- if (!(host_event & PD_EVENT_PPM))
- return NOTIFY_OK;
+ if (host_event & PD_EVENT_INIT) {
+ /* Late init event received from ChromeOS EC. Treat this as a
+ * system resume to re-enable communication with the PPM.
+ */
+ dev_dbg(udata->dev, "Late PD init received\n");
+ ucsi_resume(udata->ucsi);
+ }
- dev_dbg(udata->dev, "UCSI notification received\n");
- flush_work(&udata->work);
- schedule_work(&udata->work);
+ if (host_event & PD_EVENT_PPM) {
+ dev_dbg(udata->dev, "UCSI notification received\n");
+ flush_work(&udata->work);
+ schedule_work(&udata->work);
+ }
return NOTIFY_OK;
}
--
2.48.1.362.g079036d154-goog
