usb: host: xhci: add a quirk for disable autosuspend

Some USB controllers (such as rk3328 SoC DWC3 controller with INNO
USB 3.0 PHY) don't support autosuspend well, when receive remote
wakeup signal from autosuspend, the Port Link State training failed,
the correct PLC is Resume->Recovery->U0, but when the issue happens,
the wrong PLC is Resume->Recovery->Inactive, cause resuming SS port
fail. This issue always occurs when connect with external USB 3.0 HUB.

This patch adds a quirk to disable xHC USB 3.0 root HUB autosuspend
function.

Change-Id: I6afade864235a7669f415d933b7b4983c0d46289
Signed-off-by: William Wu <william.wu@rock-chips.com>

drivers/usb/host/xhci-plat.c

@@ -294,6 +294,9 @@ static int xhci_plat_probe(struct platform_device *pdev)
 		if (device_property_read_bool(tmpdev, "xhci-trb-ent-quirk"))
 			xhci->quirks |= XHCI_TRB_ENT_QUIRK;
 
+		if (device_property_read_bool(tmpdev, "usb3-dis-autosuspend"))
+			xhci->quirks |= XHCI_DIS_AUTOSUSPEND;
+
 		device_property_read_u32(tmpdev, "imod-interval-ns",
 					 &xhci->imod_interval);
 	}

drivers/usb/host/xhci.c

@@ -17,6 +17,7 @@
 #include <linux/slab.h>
 #include <linux/dmi.h>
 #include <linux/dma-mapping.h>
+#include <linux/usb/quirks.h>
 
 #include "xhci.h"
 #include "xhci-trace.h"
@@ -5100,6 +5101,9 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks)
 		/* xHCI private pointer was set in xhci_pci_probe for the second
 		 * registered roothub.
 		 */
+		if (xhci->quirks & XHCI_DIS_AUTOSUSPEND)
+			xhci->shared_hcd->self.root_hub->quirks |=
+				USB_QUIRK_AUTO_SUSPEND;
 		return 0;
 	}
 

drivers/usb/host/xhci.h

@@ -1870,6 +1870,7 @@ struct xhci_hcd {
 #define XHCI_RESET_PLL_ON_DISCONNECT	BIT_ULL(34)
 #define XHCI_SNPS_BROKEN_SUSPEND    BIT_ULL(35)
 #define XHCI_TRB_ENT_QUIRK	BIT_ULL(36)
+#define XHCI_DIS_AUTOSUSPEND	BIT_ULL(37)
 
 	unsigned int		num_active_eps;
 	unsigned int		limit_active_eps;