From: Karthikeyan Ramasubramanian <kramasub@chromium.org>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Karthikeyan Ramasubramanian <kramasub@chromium.org>,
stable@vger.kernel.org,
Lalith Rajendran <lalithkraj@chromium.org>,
chrome-platform@lists.linux.dev,
Benson Leung <bleung@chromium.org>,
Guenter Roeck <groeck@chromium.org>,
Tzung-Bi Shih <tzungbi@kernel.org>
Subject: [PATCH v1] chrome/cros_ec: Handle events during suspend after resume completion
Date: Thu, 25 Apr 2024 14:37:11 -0600 [thread overview]
Message-ID: <20240425143710.v1.1.If2e0cef959f1f6df9f4d1ab53a97c54aa54208af@changeid> (raw)
On boards where EC IRQ is not wake capable, EC does not trigger IRQ to
signal any non-wake events until EC receives host resume event.
Commit 47ea0ddb1f56 ("platform/chrome: cros_ec_lpc: Separate host
command and irq disable") separated enabling IRQ and sending resume
event host command into early_resume and resume_complete stages
respectively. This separation leads to host not handling certain events
posted during a small time window between early_resume and
resume_complete stages. This change moves handling all events that
happened during suspend after sending host resume event.
Fixes: 47ea0ddb1f56 ("platform/chrome: cros_ec_lpc: Separate host command and irq disable")
Cc: stable@vger.kernel.org
Cc: Lalith Rajendran <lalithkraj@chromium.org>
Cc: chrome-platform@lists.linux.dev
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@chromium.org>
---
drivers/platform/chrome/cros_ec.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
diff --git a/drivers/platform/chrome/cros_ec.c b/drivers/platform/chrome/cros_ec.c
index badc68bbae8cc..41714df053916 100644
--- a/drivers/platform/chrome/cros_ec.c
+++ b/drivers/platform/chrome/cros_ec.c
@@ -432,6 +432,12 @@ static void cros_ec_send_resume_event(struct cros_ec_device *ec_dev)
void cros_ec_resume_complete(struct cros_ec_device *ec_dev)
{
cros_ec_send_resume_event(ec_dev);
+ /*
+ * Let the mfd devices know about events that occur during
+ * suspend. This way the clients know what to do with them.
+ */
+ cros_ec_report_events_during_suspend(ec_dev);
+
}
EXPORT_SYMBOL(cros_ec_resume_complete);
@@ -442,12 +448,6 @@ static void cros_ec_enable_irq(struct cros_ec_device *ec_dev)
if (ec_dev->wake_enabled)
disable_irq_wake(ec_dev->irq);
-
- /*
- * Let the mfd devices know about events that occur during
- * suspend. This way the clients know what to do with them.
- */
- cros_ec_report_events_during_suspend(ec_dev);
}
/**
@@ -475,8 +475,9 @@ EXPORT_SYMBOL(cros_ec_resume_early);
*/
int cros_ec_resume(struct cros_ec_device *ec_dev)
{
- cros_ec_enable_irq(ec_dev);
- cros_ec_send_resume_event(ec_dev);
+ cros_ec_resume_early(ec_dev);
+ cros_ec_resume_complete(ec_dev);
+
return 0;
}
EXPORT_SYMBOL(cros_ec_resume);
--
2.44.0.769.g3c40516874-goog
next reply other threads:[~2024-04-25 20:37 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-25 20:37 Karthikeyan Ramasubramanian [this message]
2024-04-26 4:37 ` [PATCH v1] chrome/cros_ec: Handle events during suspend after resume completion Tzung-Bi Shih
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