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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