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From:   Harry Pan <harry.pan@intel.com>
To:     LKML <linux-kernel@vger.kernel.org>
Cc:     gs0622@gmail.com, Harry Pan <harry.pan@intel.com>,
        mathias.nyman@intel.com, gregkh@linuxfoundation.org,
        linux-usb@vger.kernel.org
Subject: [PATCH] usb: xhci: pci: Enable Intel USB role mux on GLK platforms
Date:   Fri,  1 Feb 2019 01:13:12 +0800
Message-Id: <20190131171312.16955-1-harry.pan@intel.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Like Apollo Lake, Gemini Lake support DRD in port 0, this patch
enables the DRD support for GLK based on the EDS rev 2.2 vol #1
of section 3.8 of USB Controller.

Signed-off-by: Harry Pan <harry.pan@intel.com>
---
 drivers/usb/host/xhci-pci.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index a9ec7051f286..49b438a3ccd4 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -41,6 +41,7 @@
 #define PCI_DEVICE_ID_INTEL_BROXTON_B_XHCI		0x1aa8
 #define PCI_DEVICE_ID_INTEL_APL_XHCI			0x5aa8
 #define PCI_DEVICE_ID_INTEL_DNV_XHCI			0x19d0
+#define PCI_DEVICE_ID_INTEL_GLK_XHCI			0x31a8
 #define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_XHCI	0x15b5
 #define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_XHCI	0x15b6
 #define PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_XHCI	0x15db
@@ -194,7 +195,8 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
 		xhci->quirks |= XHCI_SSIC_PORT_UNUSED;
 	if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 	    (pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI ||
-	     pdev->device == PCI_DEVICE_ID_INTEL_APL_XHCI))
+	     pdev->device == PCI_DEVICE_ID_INTEL_APL_XHCI ||
+	     pdev->device == PCI_DEVICE_ID_INTEL_GLK_XHCI))
 		xhci->quirks |= XHCI_INTEL_USB_ROLE_SW;
 	if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 	    (pdev->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI ||
-- 
2.18.1