[PATCH 1/2 v2] mmc: enable mmc host device to suspend/resume asynchronously

[PATCH 1/2 v2] mmc: enable mmc host device to suspend/resume asynchronously

[Fu, Zhonghui]

This patch enables mmc hosts to suspend/resume asynchronously.
This will improve system suspend/resume speed. After applying
this patch and enabling all mmc hosts' child devices to
suspend/resume asynchronously on ASUS T100TA, the system
suspend-to-idle time is reduced from 1645ms to 1107ms, and the
system resume time is reduced from 940ms to 914ms.

Signed-off-by: Zhonghui Fu <zhonghui.fu@linux.intel.com>
Acked-by: Venu Byravarasu <vbyravarasu@nvidia.com>
---
Changes in v2:
- Update commit message

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

diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 0aecd5c..1d94607 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -339,6 +339,7 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
 	host->class_dev.parent = dev;
 	host->class_dev.class = &mmc_host_class;
 	device_initialize(&host->class_dev);
+	device_enable_async_suspend(&host->class_dev);
 
 	if (mmc_gpio_alloc(host)) {
 		put_device(&host->class_dev);
-- 1.7.1

Re: [PATCH 1/2 v2] mmc: enable mmc host device to suspend/resume asynchronously

[Ulf Hansson]

On 22 January 2016 at 04:32, Fu, Zhonghui <zhonghui.fu@linux.intel.com> wrote:
> This patch enables mmc hosts to suspend/resume asynchronously.
> This will improve system suspend/resume speed. After applying
> this patch and enabling all mmc hosts' child devices to
> suspend/resume asynchronously on ASUS T100TA, the system
> suspend-to-idle time is reduced from 1645ms to 1107ms, and the
> system resume time is reduced from 940ms to 914ms.

Do you really reduce time at all with this patch by its own? I think not.

Moreover, I thought the biggest improvement came from the patch which
enabled async suspend/resume for the MMC/SD/SDIO device?
ec076cd226c3 ("mmc: enable MMC/SD/SDIO device to suspend/resume asynchronously")

Similar comment applies to patch2/2, but I would expect it together
with the $subject patch gives an improvement.

Please update the change-logs one more round.

Kind regards
Uffe

>
> Signed-off-by: Zhonghui Fu <zhonghui.fu@linux.intel.com>
> Acked-by: Venu Byravarasu <vbyravarasu@nvidia.com>
> ---
> Changes in v2:
> - Update commit message
>
>  drivers/mmc/core/host.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
> index 0aecd5c..1d94607 100644
> --- a/drivers/mmc/core/host.c
> +++ b/drivers/mmc/core/host.c
> @@ -339,6 +339,7 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
>         host->class_dev.parent = dev;
>         host->class_dev.class = &mmc_host_class;
>         device_initialize(&host->class_dev);
> +       device_enable_async_suspend(&host->class_dev);
>
>         if (mmc_gpio_alloc(host)) {
>                 put_device(&host->class_dev);
> -- 1.7.1
>

Re: [PATCH 1/2 v2] mmc: enable mmc host device to suspend/resume asynchronously

[Fu, Zhonghui]

On 1/22/2016 10:51 PM, Ulf Hansson wrote:
> On 22 January 2016 at 04:32, Fu, Zhonghui <zhonghui.fu@linux.intel.com> wrote:
>> This patch enables mmc hosts to suspend/resume asynchronously.
>> This will improve system suspend/resume speed. After applying
>> this patch and enabling all mmc hosts' child devices to
>> suspend/resume asynchronously on ASUS T100TA, the system
>> suspend-to-idle time is reduced from 1645ms to 1107ms, and the
>> system resume time is reduced from 940ms to 914ms.
> Do you really reduce time at all with this patch by its own? I think not.
>
> Moreover, I thought the biggest improvement came from the patch which
> enabled async suspend/resume for the MMC/SD/SDIO device?
> ec076cd226c3 ("mmc: enable MMC/SD/SDIO device to suspend/resume asynchronously")
>
> Similar comment applies to patch2/2, but I would expect it together
> with the $subject patch gives an improvement.
>
> Please update the change-logs one more round.

The reduce time is not contributed by only this patch, please see the change-log: "After applying this patch and enabling all mmc hosts' child devices to suspend/resume asynchronously on ASUS T100TA .......". Actually, the biggest improvement came from the patch - "net/wireless: enable wiphy device to suspend/resume asynchronously(commit 9f0e13546ef5773b7059b531a667ec47a5f897ee)". Wiphy device(phy0) is child device of WiFi card(SDIO card).

Do you mean that I should list the reduce time contributed by only this patch and patch2/2 in change-log?


Thanks,
Zhonghui
>
> Kind regards
> Uffe
>
>> Signed-off-by: Zhonghui Fu <zhonghui.fu@linux.intel.com>
>> Acked-by: Venu Byravarasu <vbyravarasu@nvidia.com>
>> ---
>> Changes in v2:
>> - Update commit message
>>
>>  drivers/mmc/core/host.c |    1 +
>>  1 files changed, 1 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
>> index 0aecd5c..1d94607 100644
>> --- a/drivers/mmc/core/host.c
>> +++ b/drivers/mmc/core/host.c
>> @@ -339,6 +339,7 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
>>         host->class_dev.parent = dev;
>>         host->class_dev.class = &mmc_host_class;
>>         device_initialize(&host->class_dev);
>> +       device_enable_async_suspend(&host->class_dev);
>>
>>         if (mmc_gpio_alloc(host)) {
>>                 put_device(&host->class_dev);
>> -- 1.7.1
>>

Re: [PATCH 1/2 v2] mmc: enable mmc host device to suspend/resume asynchronously

[Ulf Hansson]

On 26 January 2016 at 03:15, Fu, Zhonghui <zhonghui.fu@linux.intel.com> wrote:
>
>
> On 1/22/2016 10:51 PM, Ulf Hansson wrote:
>> On 22 January 2016 at 04:32, Fu, Zhonghui <zhonghui.fu@linux.intel.com> wrote:
>>> This patch enables mmc hosts to suspend/resume asynchronously.
>>> This will improve system suspend/resume speed. After applying
>>> this patch and enabling all mmc hosts' child devices to
>>> suspend/resume asynchronously on ASUS T100TA, the system
>>> suspend-to-idle time is reduced from 1645ms to 1107ms, and the
>>> system resume time is reduced from 940ms to 914ms.
>> Do you really reduce time at all with this patch by its own? I think not.
>>
>> Moreover, I thought the biggest improvement came from the patch which
>> enabled async suspend/resume for the MMC/SD/SDIO device?
>> ec076cd226c3 ("mmc: enable MMC/SD/SDIO device to suspend/resume asynchronously")
>>
>> Similar comment applies to patch2/2, but I would expect it together
>> with the $subject patch gives an improvement.
>>
>> Please update the change-logs one more round.
>
> The reduce time is not contributed by only this patch, please see the change-log: "After applying this patch and enabling all mmc hosts' child devices to suspend/resume asynchronously on ASUS T100TA .......". Actually, the biggest improvement came from the patch - "net/wireless: enable wiphy device to suspend/resume asynchronously(commit 9f0e13546ef5773b7059b531a667ec47a5f897ee)". Wiphy device(phy0) is child device of WiFi card(SDIO card).
>
> Do you mean that I should list the reduce time contributed by only this patch and patch2/2 in change-log?


Okay, fair enough. I should have read the change log a bit more detailed.

Let's keep this as is! I have applied both patch 1 and patch2.

Adrian, please tell me if you don't like patch2 (sdhci-acpi), then I
will drop it.

Thanks and kind regards
Uffe