linux-kernel - [PATCH v4 1/5] usb: dwc3: separate dev_pm_ops for each pm

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Message-ID: <20241009054429.3970438-2-guanyulin@google.com>
Date: Wed,  9 Oct 2024 05:42:55 +0000
From: Guan-Yu Lin <guanyulin@...gle.com>
To: Thinh.Nguyen@...opsys.com, gregkh@...uxfoundation.org, 
	mathias.nyman@...el.com, stern@...land.harvard.edu, elder@...nel.org, 
	oneukum@...e.com, yajun.deng@...ux.dev, dianders@...omium.org, 
	kekrby@...il.com, perex@...ex.cz, tiwai@...e.com, tj@...nel.org, 
	stanley_chang@...ltek.com, andreyknvl@...il.com, 
	christophe.jaillet@...adoo.fr, quic_jjohnson@...cinc.com, 
	ricardo@...liere.net, grundler@...omium.org, niko.mauno@...sala.com
Cc: linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-sound@...r.kernel.org, badhri@...gle.com, albertccwang@...gle.com, 
	quic_wcheng@...cinc.com, pumahsu@...gle.com, 
	Guan-Yu Lin <guanyulin@...gle.com>
Subject: [PATCH v4 1/5] usb: dwc3: separate dev_pm_ops for each pm_event

Separate dev_pm_ops for different power events such as suspend, thaw,
and hibernation. This is crucial when dwc3 driver needs to adapt its
behavior based on different power state changes.

Signed-off-by: Guan-Yu Lin <guanyulin@...gle.com>
---
 drivers/usb/dwc3/core.c | 77 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 76 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index b25d80f318a9..2fdafbcbe44c 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -2582,6 +2582,76 @@ static int dwc3_resume(struct device *dev)
 	return 0;
 }
 
+static int dwc3_freeze(struct device *dev)
+{
+	struct dwc3	*dwc = dev_get_drvdata(dev);
+	int		ret;
+
+	ret = dwc3_suspend_common(dwc, PMSG_FREEZE);
+	if (ret)
+		return ret;
+
+	pinctrl_pm_select_sleep_state(dev);
+
+	return 0;
+}
+
+static int dwc3_thaw(struct device *dev)
+{
+	struct dwc3	*dwc = dev_get_drvdata(dev);
+	int		ret;
+
+	pinctrl_pm_select_default_state(dev);
+
+	pm_runtime_disable(dev);
+	pm_runtime_set_active(dev);
+
+	ret = dwc3_resume_common(dwc, PMSG_THAW);
+	if (ret) {
+		pm_runtime_set_suspended(dev);
+		return ret;
+	}
+
+	pm_runtime_enable(dev);
+
+	return 0;
+}
+
+static int dwc3_poweroff(struct device *dev)
+{
+	struct dwc3	*dwc = dev_get_drvdata(dev);
+	int		ret;
+
+	ret = dwc3_suspend_common(dwc, PMSG_HIBERNATE);
+	if (ret)
+		return ret;
+
+	pinctrl_pm_select_sleep_state(dev);
+
+	return 0;
+}
+
+static int dwc3_restore(struct device *dev)
+{
+	struct dwc3	*dwc = dev_get_drvdata(dev);
+	int		ret;
+
+	pinctrl_pm_select_default_state(dev);
+
+	pm_runtime_disable(dev);
+	pm_runtime_set_active(dev);
+
+	ret = dwc3_resume_common(dwc, PMSG_RESTORE);
+	if (ret) {
+		pm_runtime_set_suspended(dev);
+		return ret;
+	}
+
+	pm_runtime_enable(dev);
+
+	return 0;
+}
+
 static void dwc3_complete(struct device *dev)
 {
 	struct dwc3	*dwc = dev_get_drvdata(dev);
@@ -2599,7 +2669,12 @@ static void dwc3_complete(struct device *dev)
 #endif /* CONFIG_PM_SLEEP */
 
 static const struct dev_pm_ops dwc3_dev_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume)
+	.suspend = pm_sleep_ptr(dwc3_suspend),
+	.resume = pm_sleep_ptr(dwc3_resume),
+	.freeze = pm_sleep_ptr(dwc3_freeze),
+	.thaw = pm_sleep_ptr(dwc3_thaw),
+	.poweroff = pm_sleep_ptr(dwc3_poweroff),
+	.restore = pm_sleep_ptr(dwc3_restore),
 	.complete = dwc3_complete,
 	SET_RUNTIME_PM_OPS(dwc3_runtime_suspend, dwc3_runtime_resume,
 			dwc3_runtime_idle)
-- 
2.47.0.rc0.187.ge670bccf7e-goog