diff options
| author | Jameson Thies <jthies@google.com> | 2025-02-04 02:45:59 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-14 09:29:07 +0100 |
| commit | 7f7283183c62411ea50730b3d0728fedd9aceb21 (patch) | |
| tree | 63e8189ef195c867feee8e76bc45c07f5d122fdc /drivers/usb | |
| parent | dcba69711fff8af4370cb4c00460db0bf47c7093 (diff) | |
| download | ath-7f7283183c62411ea50730b3d0728fedd9aceb21.tar.gz | |
usb: typec: ucsi: resume work after EC init
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@google.com>
Reviewed-by: Łukasz Bartosik <ukaszb@chromium.org>
Reviewed-by: Benson Leung <bleung@chromium.org>
Link: https://lore.kernel.org/r/20250204024600.4138776-3-jthies@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/typec/ucsi/cros_ec_ucsi.c | 17 |
1 files 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 744f0709a40ed..4ec1c6d223109 100644 --- a/drivers/usb/typec/ucsi/cros_ec_ucsi.c +++ b/drivers/usb/typec/ucsi/cros_ec_ucsi.c @@ -206,12 +206,19 @@ 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; } |