mmc: sdhci: Let drivers decide whether to use mmc_retune_needed() with pm

Devices might save and restore tuning values so that re-tuning might not be
needed after a pm transition.  Let drivers decide by pushing the
mmc_retune_needed() logic down to them.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>

drivers/mmc/host/sdhci-acpi.c

@@ -524,8 +524,12 @@ static int sdhci_acpi_remove(struct platform_device *pdev)
 static int sdhci_acpi_suspend(struct device *dev)
 {
 	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
+	struct sdhci_host *host = c->host;
 
-	return sdhci_suspend_host(c->host);
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
+
+	return sdhci_suspend_host(host);
 }
 
 static int sdhci_acpi_resume(struct device *dev)
@@ -544,8 +548,12 @@ static int sdhci_acpi_resume(struct device *dev)
 static int sdhci_acpi_runtime_suspend(struct device *dev)
 {
 	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
+	struct sdhci_host *host = c->host;
+
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
 
-	return sdhci_runtime_suspend_host(c->host);
+	return sdhci_runtime_suspend_host(host);
 }
 
 static int sdhci_acpi_runtime_resume(struct device *dev)

drivers/mmc/host/sdhci-brcmstb.c

@@ -29,6 +29,9 @@ static int sdhci_brcmstb_suspend(struct device *dev)
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	int res;
 
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
+
 	res = sdhci_suspend_host(host);
 	if (res)
 		return res;

drivers/mmc/host/sdhci-esdhc-imx.c

@@ -1323,6 +1323,9 @@ static int sdhci_esdhc_suspend(struct device *dev)
 {
 	struct sdhci_host *host = dev_get_drvdata(dev);
 
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
+
 	return sdhci_suspend_host(host);
 }
 
@@ -1347,6 +1350,9 @@ static int sdhci_esdhc_runtime_suspend(struct device *dev)
 
 	ret = sdhci_runtime_suspend_host(host);
 
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
+
 	if (!sdhci_sdio_irq_enabled(host)) {
 		clk_disable_unprepare(imx_data->clk_per);
 		clk_disable_unprepare(imx_data->clk_ipg);

drivers/mmc/host/sdhci-of-arasan.c

@@ -315,6 +315,9 @@ static int sdhci_arasan_suspend(struct device *dev)
 	struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
 	int ret;
 
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
+
 	ret = sdhci_suspend_host(host);
 	if (ret)
 		return ret;

drivers/mmc/host/sdhci-of-at91.c

@@ -140,6 +140,9 @@ static int sdhci_at91_runtime_suspend(struct device *dev)
 
 	ret = sdhci_runtime_suspend_host(host);
 
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
+
 	clk_disable_unprepare(priv->gck);
 	clk_disable_unprepare(priv->hclock);
 	clk_disable_unprepare(priv->mainck);

drivers/mmc/host/sdhci-of-esdhc.c

@@ -528,6 +528,9 @@ static int esdhc_of_suspend(struct device *dev)
 
 	esdhc_proctl = sdhci_readl(host, SDHCI_HOST_CONTROL);
 
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
+
 	return sdhci_suspend_host(host);
 }
 

drivers/mmc/host/sdhci-pci-core.c

@@ -1653,6 +1653,7 @@ static int sdhci_pci_suspend(struct device *dev)
 	struct pci_dev *pdev = to_pci_dev(dev);
 	struct sdhci_pci_chip *chip;
 	struct sdhci_pci_slot *slot;
+	struct sdhci_host *host;
 	mmc_pm_flag_t slot_pm_flags;
 	mmc_pm_flag_t pm_flags = 0;
 	int i, ret;
@@ -1666,14 +1667,19 @@ static int sdhci_pci_suspend(struct device *dev)
 		if (!slot)
 			continue;
 
-		ret = sdhci_suspend_host(slot->host);
+		host = slot->host;
+
+		if (chip->pm_retune && host->tuning_mode != SDHCI_TUNING_MODE_3)
+			mmc_retune_needed(host->mmc);
+
+		ret = sdhci_suspend_host(host);
 
 		if (ret)
 			goto err_pci_suspend;
 
-		slot_pm_flags = slot->host->mmc->pm_flags;
+		slot_pm_flags = host->mmc->pm_flags;
 		if (slot_pm_flags & MMC_PM_WAKE_SDIO_IRQ)
-			sdhci_enable_irq_wakeups(slot->host);
+			sdhci_enable_irq_wakeups(host);
 
 		pm_flags |= slot_pm_flags;
 	}
@@ -1737,6 +1743,7 @@ static int sdhci_pci_runtime_suspend(struct device *dev)
 	struct pci_dev *pdev = to_pci_dev(dev);
 	struct sdhci_pci_chip *chip;
 	struct sdhci_pci_slot *slot;
+	struct sdhci_host *host;
 	int i, ret;
 
 	chip = pci_get_drvdata(pdev);
@@ -1748,10 +1755,15 @@ static int sdhci_pci_runtime_suspend(struct device *dev)
 		if (!slot)
 			continue;
 
-		ret = sdhci_runtime_suspend_host(slot->host);
+		host = slot->host;
 
+		ret = sdhci_runtime_suspend_host(host);
 		if (ret)
 			goto err_pci_runtime_suspend;
+
+		if (chip->rpm_retune &&
+		    host->tuning_mode != SDHCI_TUNING_MODE_3)
+			mmc_retune_needed(host->mmc);
 	}
 
 	if (chip->fixes && chip->fixes->suspend) {
@@ -2042,6 +2054,8 @@ static int sdhci_pci_probe(struct pci_dev *pdev,
 		chip->allow_runtime_pm = chip->fixes->allow_runtime_pm;
 	}
 	chip->num_slots = slots;
+	chip->pm_retune = true;
+	chip->rpm_retune = true;
 
 	pci_set_drvdata(pdev, chip);
 

drivers/mmc/host/sdhci-pci.h

@@ -97,6 +97,8 @@ struct sdhci_pci_chip {
 	unsigned int		quirks;
 	unsigned int		quirks2;
 	bool			allow_runtime_pm;
+	bool			pm_retune;
+	bool			rpm_retune;
 	const struct sdhci_pci_fixes *fixes;
 
 	int			num_slots;	/* Slots on controller */

drivers/mmc/host/sdhci-pltfm.c

@@ -213,6 +213,9 @@ static int sdhci_pltfm_suspend(struct device *dev)
 {
 	struct sdhci_host *host = dev_get_drvdata(dev);
 
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
+
 	return sdhci_suspend_host(host);
 }
 

drivers/mmc/host/sdhci-pxav3.c

@@ -527,6 +527,8 @@ static int sdhci_pxav3_suspend(struct device *dev)
 	struct sdhci_host *host = dev_get_drvdata(dev);
 
 	pm_runtime_get_sync(dev);
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
 	ret = sdhci_suspend_host(host);
 	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
@@ -560,6 +562,9 @@ static int sdhci_pxav3_runtime_suspend(struct device *dev)
 	if (ret)
 		return ret;
 
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
+
 	clk_disable_unprepare(pxa->clk_io);
 	if (!IS_ERR(pxa->clk_core))
 		clk_disable_unprepare(pxa->clk_core);

drivers/mmc/host/sdhci-s3c.c

@@ -743,6 +743,9 @@ static int sdhci_s3c_suspend(struct device *dev)
 {
 	struct sdhci_host *host = dev_get_drvdata(dev);
 
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
+
 	return sdhci_suspend_host(host);
 }
 
@@ -764,6 +767,9 @@ static int sdhci_s3c_runtime_suspend(struct device *dev)
 
 	ret = sdhci_runtime_suspend_host(host);
 
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
+
 	if (ourhost->cur_clk >= 0)
 		clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]);
 	clk_disable_unprepare(busclk);

drivers/mmc/host/sdhci-sirf.c

@@ -237,6 +237,9 @@ static int sdhci_sirf_suspend(struct device *dev)
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	int ret;
 
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
+
 	ret = sdhci_suspend_host(host);
 	if (ret)
 		return ret;

drivers/mmc/host/sdhci-spear.c

@@ -165,6 +165,9 @@ static int sdhci_suspend(struct device *dev)
 	struct spear_sdhci *sdhci = sdhci_priv(host);
 	int ret;
 
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
+
 	ret = sdhci_suspend_host(host);
 	if (!ret)
 		clk_disable(sdhci->clk);

drivers/mmc/host/sdhci-st.c

@@ -463,8 +463,12 @@ static int sdhci_st_suspend(struct device *dev)
 	struct sdhci_host *host = dev_get_drvdata(dev);
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct st_mmc_platform_data *pdata = sdhci_pltfm_priv(pltfm_host);
-	int ret = sdhci_suspend_host(host);
+	int ret;
+
+	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+		mmc_retune_needed(host->mmc);
 
+	ret = sdhci_suspend_host(host);
 	if (ret)
 		goto out;
 

drivers/mmc/host/sdhci.c

@@ -2857,8 +2857,6 @@ int sdhci_suspend_host(struct sdhci_host *host)
 	sdhci_disable_card_detection(host);
 
 	mmc_retune_timer_stop(host->mmc);
-	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
-		mmc_retune_needed(host->mmc);
 
 	if (!device_may_wakeup(mmc_dev(host->mmc))) {
 		host->ier = 0;
@@ -2919,8 +2917,6 @@ int sdhci_runtime_suspend_host(struct sdhci_host *host)
 	unsigned long flags;
 
 	mmc_retune_timer_stop(host->mmc);
-	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
-		mmc_retune_needed(host->mmc);
 
 	spin_lock_irqsave(&host->lock, flags);
 	host->ier &= SDHCI_INT_CARD_INT;