Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1269856

[PATCH v3] mmc/sdhci-acpi: enable sdhci-acpi device to suspend/resume asynchronously

Show all headers | View raw

Now, PM core supports asynchronous suspend/resume mode for devices
during system suspend/resume, and the power state transition of one
device may be completed in separate kernel thread. PM core ensures
all power state transition timing dependency between devices. This
patch enables sdhci-acpi device to suspend/resume asynchronously.
This will take advantage of multicore and improve system
suspend/resume speed. After enabling the sdhci-acpi devices and all
their child devices to suspend/resume asynchronously on ASUS T100TA,
the system suspend-to-idle time is reduced from 1645ms to 1096ms, and
the system resume time is reduced from 940ms to 908ms.

Signed-off-by: Zhonghui Fu <zhonghui.fu@linux.intel.com>
---
Changes in v3:
- Add test result in commit message

 drivers/mmc/host/sdhci-acpi.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
index f6047fc..3d27f2d 100644
--- a/drivers/mmc/host/sdhci-acpi.c
+++ b/drivers/mmc/host/sdhci-acpi.c
@@ -388,6 +388,8 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
 		pm_runtime_enable(dev);
 	}
 
+	device_enable_async_suspend(dev);
+
 	return 0;
 
 err_free:
-- 1.7.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH v3] mmc/sdhci-acpi: enable sdhci-acpi device to suspend/resume  asynchronously "Fu, Zhonghui" <zhonghui.fu@linux.intel.com> - 2015-11-16 07:30 +0100
  Re: [PATCH v3] mmc/sdhci-acpi: enable sdhci-acpi device to suspend/resume  asynchronously "Fu, Zhonghui" <zhonghui.fu@linux.intel.com> - 2015-11-23 05:10 +0100

csiph-web