[PATCH 5.15 902/913] mmc: rtsx: Let MMC core handle runtime PM

From: Greg Kroah-Hartman
Date: Tue Apr 05 2022 - 16:35:20 EST


From: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>

commit 7570fb41e450ba37bf9335fe3751fa9f502c30fa upstream.

Since MMC core handles runtime PM reference counting, we can avoid doing
redundant runtime PM work in the driver. That means the only thing
commit 5b4258f6721f ("misc: rtsx: rts5249 support runtime PM") misses is
to always enable runtime PM, to let its parent driver enable ASPM in the
runtime idle routine.

Fixes: 7499b529d97f ("mmc: rtsx: Use pm_runtime_{get,put}() to handle runtime PM")
Reviewed-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220216055435.2335297-1-kai.heng.feng@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/host/rtsx_pci_sdmmc.c | 18 ------------------
1 file changed, 18 deletions(-)

--- a/drivers/mmc/host/rtsx_pci_sdmmc.c
+++ b/drivers/mmc/host/rtsx_pci_sdmmc.c
@@ -823,7 +823,6 @@ static void sd_request(struct work_struc
}

mutex_lock(&pcr->pcr_mutex);
- pm_runtime_get_sync(dev);

rtsx_pci_start_run(pcr);

@@ -860,8 +859,6 @@ 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:
@@ -1093,7 +1090,6 @@ static void sdmmc_set_ios(struct mmc_hos
return;

mutex_lock(&pcr->pcr_mutex);
- pm_runtime_get_sync(dev);

rtsx_pci_start_run(pcr);

@@ -1127,8 +1123,6 @@ 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);
}

@@ -1144,7 +1138,6 @@ 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);

@@ -1154,8 +1147,6 @@ 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;
@@ -1173,7 +1164,6 @@ 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);

@@ -1183,8 +1173,6 @@ 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;
@@ -1282,7 +1270,6 @@ static int sdmmc_switch_voltage(struct m
return err;

mutex_lock(&pcr->pcr_mutex);
- pm_runtime_get_sync(dev);

rtsx_pci_start_run(pcr);

@@ -1312,8 +1299,6 @@ 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;
@@ -1334,7 +1319,6 @@ static int sdmmc_execute_tuning(struct m
return err;

mutex_lock(&pcr->pcr_mutex);
- pm_runtime_get_sync(dev);

rtsx_pci_start_run(pcr);

@@ -1367,8 +1351,6 @@ 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;