Any comments are welcome.
Thanks,
Zhonghui
On 4/13/2016 2:42 PM, Fu, Zhonghui wrote:
> Leave some work of SDIO card's resume process into it's runtime resume
> process to shorten system resume latency.
>
> Signed-off-by: Zhonghui Fu <zhonghui.fu@xxxxxxxxxxxxxxx>
> ---
> drivers/mmc/core/sdio.c | 21 ++++++++++-----------
> include/linux/mmc/host.h | 9 ++++++---
> 2 files changed, 16 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
> index bd44ba8..fe5d3c5 100644
> --- a/drivers/mmc/core/sdio.c
> +++ b/drivers/mmc/core/sdio.c
> @@ -902,6 +902,10 @@ static int mmc_sdio_suspend(struct mmc_host *host)
>
> if (!mmc_card_keep_power(host)) {
> mmc_power_off(host);
> + if (host->caps & MMC_CAP_POWER_OFF_CARD) {
> + pm_runtime_disable(&host->card->dev);
> + pm_runtime_set_suspended(&host->card->dev);
> + }
> } else if (host->retune_period) {
> mmc_retune_timer_stop(host);
> mmc_retune_needed(host);
> @@ -924,18 +928,16 @@ static int mmc_sdio_resume(struct mmc_host *host)
>
> /* Restore power if needed */
> if (!mmc_card_keep_power(host)) {
> - mmc_power_up(host, host->card->ocr);
> /*
> - * Tell runtime PM core we just powered up the card,
> - * since it still believes the card is powered off.
> * Note that currently runtime PM is only enabled
> * for SDIO cards that are MMC_CAP_POWER_OFF_CARD
> */
> if (host->caps & MMC_CAP_POWER_OFF_CARD) {
> - pm_runtime_disable(&host->card->dev);
> - pm_runtime_set_active(&host->card->dev);
> pm_runtime_enable(&host->card->dev);
> + goto out;
> }
> +
> + mmc_power_up(host, host->card->ocr);
> }
>
> /* No need to reinitialize powered-resumed nonremovable cards */
> @@ -953,13 +955,10 @@ static int mmc_sdio_resume(struct mmc_host *host)
> err = sdio_enable_4bit_bus(host->card);
> }
>
> - if (!err && host->sdio_irqs) {
> - if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD))
> - wake_up_process(host->sdio_irq_thread);
> - else if (host->caps & MMC_CAP_SDIO_IRQ)
> - host->ops->enable_sdio_irq(host, 1);
> - }
> + if (!err && host->sdio_irqs)
> + mmc_signal_sdio_irq(host);
>
> +out:
> mmc_release_host(host);
>
> host->pm_flags &= ~MMC_PM_KEEP_POWER;
> diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
> index 8dd4d29..8faaa5b 100644
> --- a/include/linux/mmc/host.h
> +++ b/include/linux/mmc/host.h
> @@ -400,10 +400,13 @@ void mmc_request_done(struct mmc_host *, struct mmc_request *);
>
> static inline void mmc_signal_sdio_irq(struct mmc_host *host)
> {
> - host->ops->enable_sdio_irq(host, 0);
> - host->sdio_irq_pending = true;
> - if (host->sdio_irq_thread)
> + if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) {
> + host->ops->enable_sdio_irq(host, 0);
> + host->sdio_irq_pending = true;
> wake_up_process(host->sdio_irq_thread);
> + } else if (host->caps & MMC_CAP_SDIO_IRQ) {
> + host->ops->enable_sdio_irq(host, 1);
> + }
> }
>
> void sdio_run_irqs(struct mmc_host *host);
> -- 1.7.1
>
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