@@ -284,6 +284,8 @@ int mmc_of_parse(struct mmc_host *host)
if (device_property_read_bool(dev, "wakeup-source") ||
device_property_read_bool(dev, "enable-sdio-wakeup")) /* legacy */
host->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
+ if (device_property_read_bool(dev, "cqe-off-in-suspend"))
+ host->pm_caps |= MMC_PM_CQE_OFF_IN_SUSPEND;
if (device_property_read_bool(dev, "mmc-ddr-3_3v"))
host->caps |= MMC_CAP_3_3V_DDR;
if (device_property_read_bool(dev, "mmc-ddr-1_8v"))
@@ -2047,6 +2047,11 @@ static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
err = mmc_deselect_cards(host);
if (!err) {
+ if (host->cqe_enabled &&
+ (host->pm_caps & MMC_PM_CQE_OFF_IN_SUSPEND)) {
+ host->cqe_ops->cqe_disable(host);
+ host->cqe_enabled = false;
+ }
mmc_power_off(host);
mmc_card_set_suspended(host->card);
}
@@ -23,5 +23,6 @@ typedef unsigned int mmc_pm_flag_t;
#define MMC_PM_KEEP_POWER (1 << 0) /* preserve card power during suspend */
#define MMC_PM_WAKE_SDIO_IRQ (1 << 1) /* wake up host system on SDIO IRQ assertion */
+#define MMC_PM_CQE_OFF_IN_SUSPEND (1 << 2) /* cqe off during suspend */
#endif /* LINUX_MMC_PM_H */
Before we got these errors on MT8192 platform: [ 59.153891] Restarting tasks ... [ 59.154540] done. [ 59.159175] PM: suspend exit [ 59.218724] mtk-msdc 11f60000.mmc: phase: [map:fffffffe] [maxlen:31] [final:16] [ 119.776083] mmc0: cqhci: timeout for tag 9 [ 119.780196] mmc0: cqhci: ============ CQHCI REGISTER DUMP =========== [ 119.786709] mmc0: cqhci: Caps: 0x100020b6 | Version: 0x00000510 [ 119.793225] mmc0: cqhci: Config: 0x00000101 | Control: 0x00000000 [ 119.799706] mmc0: cqhci: Int stat: 0x00000000 | Int enab: 0x00000000 [ 119.806177] mmc0: cqhci: Int sig: 0x00000000 | Int Coal: 0x00000000 [ 119.812670] mmc0: cqhci: TDL base: 0x00000000 | TDL up32: 0x00000000 [ 119.819149] mmc0: cqhci: Doorbell: 0x003ffc00 | TCN: 0x00000200 [ 119.825656] mmc0: cqhci: Dev queue: 0x00000000 | Dev Pend: 0x00000000 [ 119.832155] mmc0: cqhci: Task clr: 0x00000000 | SSC1: 0x00001000 [ 119.838627] mmc0: cqhci: SSC2: 0x00000000 | DCMD rsp: 0x00000000 [ 119.845174] mmc0: cqhci: RED mask: 0xfdf9a080 | TERRI: 0x0000891c [ 119.851654] mmc0: cqhci: Resp idx: 0x00000000 | Resp arg: 0x00000000 [ 119.865773] mmc0: cqhci: : =========================================== [ 119.872358] mmc0: running CQE recovery From these logs, we found TDL base was back to the default value. After suspend, the mmc host is powered off by HW, and bring CQE register to the default value, so CQE need to be re-initialized after resuming back. Signed-off-by: Wenbin Mei <wenbin.mei@mediatek.com> --- drivers/mmc/core/host.c | 2 ++ drivers/mmc/core/mmc.c | 5 +++++ include/linux/mmc/pm.h | 1 + 3 files changed, 8 insertions(+)