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From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Linux ACPI <linux-acpi@vger.kernel.org>
Cc: Linux PM <linux-pm@vger.kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Zhang Rui <rui.zhang@intel.com>,
	Rajneesh Bhardwaj <rajneesh.bhardwaj@linux.intel.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Mario Limonciello <mario.limonciello@dell.com>,
	Kai-Heng Feng <kai.heng.feng@canonical.com>
Subject: [PATCH v3 4/8] ACPI: PM: s2idle: Switch EC over to polling during "noirq" suspend
Date: Fri, 02 Aug 2019 12:40:43 +0200	[thread overview]
Message-ID: <2250753.m3tS5N7MJZ@kreacher> (raw)
In-Reply-To: <5997740.FPbUVk04hV@kreacher>

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Since the ACPI SCI is set up for system wakeup before the "noirq"
suspend of devices, it is better to make suspend-to-idle follow
suspend-to-RAM (S3) and switch over the EC to polling during "noirq"
suspend (and back to interrupt-based flow during "noirq" resume).

The frequency of spurious wakeup interrupts from the EC may be
reduced this way.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

In v2 this was patch 5.

---
 drivers/acpi/ec.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Index: linux-pm/drivers/acpi/ec.c
===================================================================
--- linux-pm.orig/drivers/acpi/ec.c
+++ linux-pm/drivers/acpi/ec.c
@@ -1958,8 +1958,7 @@ static int acpi_ec_suspend_noirq(struct
 	    ec->reference_count >= 1)
 		acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE);
 
-	if (acpi_sleep_no_ec_events())
-		acpi_ec_enter_noirq(ec);
+	acpi_ec_enter_noirq(ec);
 
 	return 0;
 }
@@ -1968,8 +1967,7 @@ static int acpi_ec_resume_noirq(struct d
 {
 	struct acpi_ec *ec = acpi_driver_data(to_acpi_device(dev));
 
-	if (acpi_sleep_no_ec_events())
-		acpi_ec_leave_noirq(ec);
+	acpi_ec_leave_noirq(ec);
 
 	if (ec_no_wakeup && test_bit(EC_FLAGS_STARTED, &ec->flags) &&
 	    ec->reference_count >= 1)




  parent reply	other threads:[~2019-08-02 10:46 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-02 10:33 [PATCH v3 0/8] PM / ACPI: sleep: Additional changes related to suspend-to-idle Rafael J. Wysocki
2019-08-02 10:38 ` [PATCH v3 1/8] ACPI: PM: Set up EC GPE for system wakeup from drivers that need it Rafael J. Wysocki
2019-08-02 10:38 ` [PATCH v3 2/8] ACPI: PM: s2idle: Rearrange lps0_device_attach() Rafael J. Wysocki
2019-08-02 10:38 ` [PATCH v3 3/8] ACPI: PM: s2idle: Add acpi.sleep_no_lps0 module parameter Rafael J. Wysocki
2019-08-02 10:40 ` Rafael J. Wysocki [this message]
2019-08-02 10:41 ` [PATCH v3 5/8] ACPI: PM: s2idle: Eliminate acpi_sleep_no_ec_events() Rafael J. Wysocki
2019-08-02 10:43 ` [PATCH v3 6/8] ACPI: EC: PM: Consolidate some code depending on PM_SLEEP Rafael J. Wysocki
2019-08-02 10:44 ` [PATCH v3 7/8] ACPI: EC: PM: Make acpi_ec_dispatch_gpe() print debug message Rafael J. Wysocki
2019-08-02 10:45 ` [PATCH v3 8/8] ACPI: PM: s2idle: Execute LPS0 _DSM functions with suspended devices Rafael J. Wysocki
     [not found]   ` <CGME20190809120052eucas1p11b56806662ef4f4efb82a152ad651481@eucas1p1.samsung.com>
2019-08-09 12:00     ` Marek Szyprowski
2019-08-09 12:15       ` Rafael J. Wysocki
2019-08-10 11:24       ` [PATCH] PM: suspend: Fix platform_suspend_prepare_noirq() Rafael J. Wysocki
2019-08-05 16:25 ` [PATCH v3 0/8] PM / ACPI: sleep: Additional changes related to suspend-to-idle Kai-Heng Feng
2019-08-12 13:55 ` Bhardwaj, Rajneesh
2019-08-12 21:32   ` Rafael J. Wysocki
2019-08-16 20:20 ` Kristian Klausen
2019-08-19  7:59   ` Rafael J. Wysocki
2019-08-19  9:05     ` Rafael J. Wysocki
2019-08-19 15:45       ` Kristian Klausen
2019-08-19 20:41         ` Rafael J. Wysocki
2019-08-20 13:10           ` Kristian Klausen
2019-08-20 13:29             ` Rafael J. Wysocki
2019-08-20 21:38               ` Rafael J. Wysocki
2019-08-20 22:47                 ` Kristian Klausen
2019-08-21  7:30                   ` Rafael J. Wysocki

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