[PATCH AUTOSEL 5.15 15/25] platform/chrome: cros_ec: Notify the PM of wake events during resume

From: Sasha Levin
Date: Sun Oct 09 2022 - 20:22:45 EST


From: Jameson Thies <jthies@xxxxxxxxxx>

[ Upstream commit 8edd2752b0aa498b3a61f3caee8f79f7e0567fad ]

cros_ec_handle_event in the cros_ec driver can notify the PM of wake
events. When a device is suspended, cros_ec_handle_event will not check
MKBP events. Instead, received MKBP events are checked during resume by
cros_ec_report_events_during_suspend. But
cros_ec_report_events_during_suspend cannot notify the PM if received
events are wake events, causing wake events to not be reported if
received while the device is suspended.

Update cros_ec_report_events_during_suspend to notify the PM of wake
events during resume by calling pm_wakeup_event.

Signed-off-by: Jameson Thies <jthies@xxxxxxxxxx>
Reviewed-by: Prashant Malani <pmalani@xxxxxxxxxxxx>
Reviewed-by: Benson Leung <bleung@xxxxxxxxxxxx>
Signed-off-by: Tzung-Bi Shih <tzungbi@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220913204954.2931042-1-jthies@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/platform/chrome/cros_ec.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/chrome/cros_ec.c b/drivers/platform/chrome/cros_ec.c
index 4f0390b10cd3..9664e13ded59 100644
--- a/drivers/platform/chrome/cros_ec.c
+++ b/drivers/platform/chrome/cros_ec.c
@@ -353,10 +353,16 @@ EXPORT_SYMBOL(cros_ec_suspend);

static void cros_ec_report_events_during_suspend(struct cros_ec_device *ec_dev)
{
+ bool wake_event;
+
while (ec_dev->mkbp_event_supported &&
- cros_ec_get_next_event(ec_dev, NULL, NULL) > 0)
+ cros_ec_get_next_event(ec_dev, &wake_event, NULL) > 0) {
blocking_notifier_call_chain(&ec_dev->event_notifier,
1, ec_dev);
+
+ if (wake_event && device_may_wakeup(ec_dev->dev))
+ pm_wakeup_event(ec_dev->dev, 0);
+ }
}

/**
--
2.35.1