linux-kernel - [PATCH 5.12 319/363] xhci-pci: Allow host runtime PM as default for Intel Alder Lake xHCI

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Message-Id: <20210517140313.390751952@linuxfoundation.org>
Date:   Mon, 17 May 2021 16:03:05 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Abhijeet Rao <abhijeet.rao@...el.com>,
        "Nikunj A. Dadhania" <nikunj.dadhania@...el.com>,
        Azhar Shaikh <azhar.shaikh@...el.com>,
        Mathias Nyman <mathias.nyman@...ux.intel.com>
Subject: [PATCH 5.12 319/363] xhci-pci: Allow host runtime PM as default for Intel Alder Lake xHCI

From: Abhijeet Rao <abhijeet.rao@...el.com>

commit b813511135e8b84fa741afdfbab4937919100bef upstream.

In the same way as Intel Tiger Lake TCSS (Type-C Subsystem) the Alder Lake
TCSS xHCI needs to be runtime suspended whenever possible to allow the
TCSS hardware block to enter D3cold and thus save energy.

Cc: stable@...r.kernel.org
Signed-off-by: Abhijeet Rao <abhijeet.rao@...el.com>
Signed-off-by: Nikunj A. Dadhania <nikunj.dadhania@...el.com>
Signed-off-by: Azhar Shaikh <azhar.shaikh@...el.com>
Signed-off-by: Mathias Nyman <mathias.nyman@...ux.intel.com>
Link: https://lore.kernel.org/r/20210512080816.866037-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/usb/host/xhci-pci.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -57,6 +57,7 @@
 #define PCI_DEVICE_ID_INTEL_CML_XHCI			0xa3af
 #define PCI_DEVICE_ID_INTEL_TIGER_LAKE_XHCI		0x9a13
 #define PCI_DEVICE_ID_INTEL_MAPLE_RIDGE_XHCI		0x1138
+#define PCI_DEVICE_ID_INTEL_ALDER_LAKE_XHCI		0x461e
 
 #define PCI_DEVICE_ID_AMD_PROMONTORYA_4			0x43b9
 #define PCI_DEVICE_ID_AMD_PROMONTORYA_3			0x43ba
@@ -243,7 +244,8 @@ static void xhci_pci_quirks(struct devic
 	     pdev->device == PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_XHCI ||
 	     pdev->device == PCI_DEVICE_ID_INTEL_ICE_LAKE_XHCI ||
 	     pdev->device == PCI_DEVICE_ID_INTEL_TIGER_LAKE_XHCI ||
-	     pdev->device == PCI_DEVICE_ID_INTEL_MAPLE_RIDGE_XHCI))
+	     pdev->device == PCI_DEVICE_ID_INTEL_MAPLE_RIDGE_XHCI ||
+	     pdev->device == PCI_DEVICE_ID_INTEL_ALDER_LAKE_XHCI))
 		xhci->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
 
 	if (pdev->vendor == PCI_VENDOR_ID_ETRON &&