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Date: Tue, 5 Apr 2022 09:31:33 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Ricky WU <ricky_wu@...ltek.com>,
Kai-Heng Feng <kai.heng.feng@...onical.com>
Subject: [PATCH 5.16 0980/1017] mmc: rtsx: Use pm_runtime_{get,put}() to handle runtime PM
From: Kai-Heng Feng <kai.heng.feng@...onical.com>
commit 7499b529d97f752124fa62fefa1d6d44b371215a upstream.
Commit 5b4258f6721f ("misc: rtsx: rts5249 support runtime PM") doesn't
use pm_runtime_{get,put}() helpers when it should, so the RPM refcount
keeps at zero, hence its parent driver, rtsx_pci, has to do lots of
weird tricks to keep it from runtime suspending.
So use those helpers at right places to properly manage runtime PM.
Fixes: 5b4258f6721f ("misc: rtsx: rts5249 support runtime PM")
Cc: Ricky WU <ricky_wu@...ltek.com>
Tested-by: Ricky WU <ricky_wu@...ltek.com>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
Link: https://lore.kernel.org/r/20220125055010.1866563-1-kai.heng.feng@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/mmc/host/rtsx_pci_sdmmc.c | 44 ++++++++++++++++++++++++++++----------
1 file changed, 33 insertions(+), 11 deletions(-)
--- a/drivers/mmc/host/rtsx_pci_sdmmc.c
+++ b/drivers/mmc/host/rtsx_pci_sdmmc.c
@@ -806,6 +806,7 @@ static void sd_request(struct work_struc
struct mmc_request *mrq = host->mrq;
struct mmc_command *cmd = mrq->cmd;
struct mmc_data *data = mrq->data;
+ struct device *dev = &host->pdev->dev;
unsigned int data_size = 0;
int err;
@@ -822,6 +823,7 @@ static void sd_request(struct work_struc
}
mutex_lock(&pcr->pcr_mutex);
+ pm_runtime_get_sync(dev);
rtsx_pci_start_run(pcr);
@@ -858,6 +860,8 @@ static void sd_request(struct work_struc
data->bytes_xfered = data->blocks * data->blksz;
}
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
mutex_unlock(&pcr->pcr_mutex);
finish:
@@ -1080,6 +1084,7 @@ static void sdmmc_set_ios(struct mmc_hos
{
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
struct rtsx_pcr *pcr = host->pcr;
+ struct device *dev = &host->pdev->dev;
if (host->eject)
return;
@@ -1088,6 +1093,7 @@ static void sdmmc_set_ios(struct mmc_hos
return;
mutex_lock(&pcr->pcr_mutex);
+ pm_runtime_get_sync(dev);
rtsx_pci_start_run(pcr);
@@ -1121,6 +1127,8 @@ static void sdmmc_set_ios(struct mmc_hos
rtsx_pci_switch_clock(pcr, ios->clock, host->ssc_depth,
host->initial_mode, host->double_clk, host->vpclk);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
mutex_unlock(&pcr->pcr_mutex);
}
@@ -1128,6 +1136,7 @@ static int sdmmc_get_ro(struct mmc_host
{
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
struct rtsx_pcr *pcr = host->pcr;
+ struct device *dev = &host->pdev->dev;
int ro = 0;
u32 val;
@@ -1135,6 +1144,7 @@ static int sdmmc_get_ro(struct mmc_host
return -ENOMEDIUM;
mutex_lock(&pcr->pcr_mutex);
+ pm_runtime_get_sync(dev);
rtsx_pci_start_run(pcr);
@@ -1144,6 +1154,8 @@ static int sdmmc_get_ro(struct mmc_host
if (val & SD_WRITE_PROTECT)
ro = 1;
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
mutex_unlock(&pcr->pcr_mutex);
return ro;
@@ -1153,6 +1165,7 @@ static int sdmmc_get_cd(struct mmc_host
{
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
struct rtsx_pcr *pcr = host->pcr;
+ struct device *dev = &host->pdev->dev;
int cd = 0;
u32 val;
@@ -1160,6 +1173,7 @@ static int sdmmc_get_cd(struct mmc_host
return cd;
mutex_lock(&pcr->pcr_mutex);
+ pm_runtime_get_sync(dev);
rtsx_pci_start_run(pcr);
@@ -1169,6 +1183,8 @@ static int sdmmc_get_cd(struct mmc_host
if (val & SD_EXIST)
cd = 1;
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
mutex_unlock(&pcr->pcr_mutex);
return cd;
@@ -1251,6 +1267,7 @@ static int sdmmc_switch_voltage(struct m
{
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
struct rtsx_pcr *pcr = host->pcr;
+ struct device *dev = &host->pdev->dev;
int err = 0;
u8 voltage;
@@ -1265,6 +1282,7 @@ static int sdmmc_switch_voltage(struct m
return err;
mutex_lock(&pcr->pcr_mutex);
+ pm_runtime_get_sync(dev);
rtsx_pci_start_run(pcr);
@@ -1294,6 +1312,8 @@ out:
err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
mutex_unlock(&pcr->pcr_mutex);
return err;
@@ -1303,6 +1323,7 @@ static int sdmmc_execute_tuning(struct m
{
struct realtek_pci_sdmmc *host = mmc_priv(mmc);
struct rtsx_pcr *pcr = host->pcr;
+ struct device *dev = &host->pdev->dev;
int err = 0;
if (host->eject)
@@ -1313,6 +1334,7 @@ static int sdmmc_execute_tuning(struct m
return err;
mutex_lock(&pcr->pcr_mutex);
+ pm_runtime_get_sync(dev);
rtsx_pci_start_run(pcr);
@@ -1345,6 +1367,8 @@ static int sdmmc_execute_tuning(struct m
err = sd_change_phase(host, DDR50_RX_PHASE(pcr), true);
out:
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
mutex_unlock(&pcr->pcr_mutex);
return err;
@@ -1495,12 +1519,12 @@ static int rtsx_pci_sdmmc_drv_probe(stru
realtek_init_host(host);
- if (pcr->rtd3_en) {
- pm_runtime_set_autosuspend_delay(&pdev->dev, 5000);
- pm_runtime_use_autosuspend(&pdev->dev);
- pm_runtime_enable(&pdev->dev);
- }
-
+ pm_runtime_no_callbacks(&pdev->dev);
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_set_autosuspend_delay(&pdev->dev, 200);
+ pm_runtime_mark_last_busy(&pdev->dev);
+ pm_runtime_use_autosuspend(&pdev->dev);
mmc_add_host(mmc);
@@ -1521,11 +1545,6 @@ static int rtsx_pci_sdmmc_drv_remove(str
pcr->slots[RTSX_SD_CARD].card_event = NULL;
mmc = host->mmc;
- if (pcr->rtd3_en) {
- pm_runtime_dont_use_autosuspend(&pdev->dev);
- pm_runtime_disable(&pdev->dev);
- }
-
cancel_work_sync(&host->work);
mutex_lock(&host->host_mutex);
@@ -1548,6 +1567,9 @@ static int rtsx_pci_sdmmc_drv_remove(str
flush_work(&host->work);
+ pm_runtime_dont_use_autosuspend(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
mmc_free_host(mmc);
dev_dbg(&(pdev->dev),
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