Re: [PATCH 2/2] mmc/sdhci-acpi: enable sdhci-acpi device to suspend/resume asynchronously

[Fu, Zhonghui]

Hi Ulf,

What do you think about this patch?


Thanks,
Zhonghui

On 12/28/2015 11:41 PM, Fu, Zhonghui wrote:
> 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 dependency between devices. This patch
> enables sdhci-acpi devices 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 1089ms, and the
> system resume time is reduced from 940ms to 908ms.
>
> Signed-off-by: Zhonghui Fu <zhonghui.fu@xxxxxxxxxxxxxxx>
> ---
>  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
>