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From: Aisheng Dong <aisheng.dong@nxp.com>
To: "linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>
Cc: Aisheng Dong <aisheng.dong@nxp.com>,
	"ulf.hansson@linaro.org" <ulf.hansson@linaro.org>,
	"dongas86@gmail.com" <dongas86@gmail.com>,
	"khilman@kernel.org" <khilman@kernel.org>,
	"rjw@rjwysocki.net" <rjw@rjwysocki.net>,
	dl-linux-imx <linux-imx@nxp.com>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH 2/2] PM / Domains: Choose the deepest state to enter if no devices using it
Date: Wed, 6 Mar 2019 13:35:23 +0000	[thread overview]
Message-ID: <1551878926-8455-3-git-send-email-aisheng.dong@nxp.com> (raw)
In-Reply-To: <1551878926-8455-1-git-send-email-aisheng.dong@nxp.com>

For a domain has no working devices anymore, let's choose the deepest state
to enter to save power. e.g. driver probe failure.

Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
---
 drivers/base/power/domain.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 847a69e..d3f57c2 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -550,6 +550,10 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on,
 	if (!genpd->gov)
 		genpd->state_idx = 0;
 
+	/* Choose the deepest state if no devices using this domain */
+	if (!genpd->device_count)
+		genpd->state_idx = genpd->state_count - 1;
+
 	/*
 	 * If sd_count > 0 at this point, one of the subdomains hasn't
 	 * managed to call genpd_power_on() for the master yet after
-- 
2.7.4

WARNING: multiple messages have this Message-ID (diff)
From: Aisheng Dong <aisheng.dong@nxp.com>
To: "linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>
Cc: Aisheng Dong <aisheng.dong@nxp.com>,
	"ulf.hansson@linaro.org" <ulf.hansson@linaro.org>,
	"dongas86@gmail.com" <dongas86@gmail.com>,
	"khilman@kernel.org" <khilman@kernel.org>,
	"rjw@rjwysocki.net" <rjw@rjwysocki.net>,
	dl-linux-imx <linux-imx@nxp.com>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH 2/2] PM / Domains: Choose the deepest state to enter if no devices using it
Date: Wed, 6 Mar 2019 13:35:23 +0000	[thread overview]
Message-ID: <1551878926-8455-3-git-send-email-aisheng.dong@nxp.com> (raw)
In-Reply-To: <1551878926-8455-1-git-send-email-aisheng.dong@nxp.com>

For a domain has no working devices anymore, let's choose the deepest state
to enter to save power. e.g. driver probe failure.

Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
---
 drivers/base/power/domain.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 847a69e..d3f57c2 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -550,6 +550,10 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on,
 	if (!genpd->gov)
 		genpd->state_idx = 0;
 
+	/* Choose the deepest state if no devices using this domain */
+	if (!genpd->device_count)
+		genpd->state_idx = genpd->state_count - 1;
+
 	/*
 	 * If sd_count > 0 at this point, one of the subdomains hasn't
 	 * managed to call genpd_power_on() for the master yet after
-- 
2.7.4


_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2019-03-06 13:35 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-06 13:35 [PATCH 0/2] PM / Domains: Support enter deepest state during suspend and probe failure Aisheng Dong
2019-03-06 13:35 ` Aisheng Dong
2019-03-06 13:35 ` [PATCH 1/2] PM / Domains: Support enter deepest state for multiple states domains Aisheng Dong
2019-03-06 13:35   ` Aisheng Dong
2019-03-06 15:17   ` Ulf Hansson
2019-03-06 15:17     ` Ulf Hansson
2019-03-06 15:36     ` Aisheng Dong
2019-03-06 15:36       ` Aisheng Dong
2019-03-07 16:01       ` Kevin Hilman
2019-03-07 16:01         ` Kevin Hilman
2019-03-15  2:08         ` Aisheng Dong
2019-03-15  2:08           ` Aisheng Dong
2019-03-06 13:35 ` Aisheng Dong [this message]
2019-03-06 13:35   ` [PATCH 2/2] PM / Domains: Choose the deepest state to enter if no devices using it Aisheng Dong
2019-03-06 15:10   ` Ulf Hansson
2019-03-06 15:10     ` Ulf Hansson
2019-03-06 15:46     ` Aisheng Dong
2019-03-06 15:46       ` Aisheng Dong

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