usb: host: xhci-plat: allow upper layers to signal power loss

Now that xhci_resume() exposes a power_lost boolean argument, expose
that to all xhci-plat implementations. They are free to set it from
wherever they want:
 - Their own resume() callback.
 - The xhci_plat_priv::resume_quirk() callback.

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20250205-s2r-cdns-v7-8-13658a271c3c@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: tleb

drivers/usb/host/xhci-plat.c

@@ -482,6 +482,7 @@ static int xhci_plat_suspend(struct device *dev)
 static int xhci_plat_resume_common(struct device *dev, bool power_lost)
 {
 	struct usb_hcd	*hcd = dev_get_drvdata(dev);
+	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
 	int ret;
 
@@ -501,7 +502,7 @@ static int xhci_plat_resume_common(struct device *dev, bool power_lost)
 	if (ret)
 		goto disable_clks;
 
-	ret = xhci_resume(xhci, power_lost, false);
+	ret = xhci_resume(xhci, power_lost || priv->power_lost, false);
 	if (ret)
 		goto disable_clks;
 

drivers/usb/host/xhci-plat.h

@@ -15,6 +15,7 @@ struct usb_hcd;
 struct xhci_plat_priv {
 	const char *firmware_name;
 	unsigned long long quirks;
+	bool power_lost;
 	void (*plat_start)(struct usb_hcd *);
 	int (*init_quirk)(struct usb_hcd *);
 	int (*suspend_quirk)(struct usb_hcd *);