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From: Mathias Nyman <mathias.nyman@linux.intel.com>
To: <gregkh@linuxfoundation.org>
Cc: <linux-usb@vger.kernel.org>,
	Basavaraj Natikar <Basavaraj.Natikar@amd.com>,
	Mario Limonciello <mario.limonciello@amd.com>,
	Mathias Nyman <mathias.nyman@linux.intel.com>
Subject: [PATCH 14/19] xhci: Loosen RPM as default policy to cover for AMD xHC 1.1
Date: Thu, 19 Oct 2023 13:29:19 +0300	[thread overview]
Message-ID: <20231019102924.2797346-15-mathias.nyman@linux.intel.com> (raw)
In-Reply-To: <20231019102924.2797346-1-mathias.nyman@linux.intel.com>

From: Basavaraj Natikar <Basavaraj.Natikar@amd.com>

The AMD USB host controller (1022:43f7) isn't going into PCI D3 by default
without anything connected. This is because the policy that was introduced
by commit a611bf473d1f ("xhci-pci: Set runtime PM as default policy on all
xHC 1.2 or later devices") only covered 1.2 or later.

The 1.1 specification also has the same requirement as the 1.2
specification for D3 support. So expand the runtime PM as default policy
to all AMD 1.1 devices as well.

Fixes: a611bf473d1f ("xhci-pci: Set runtime PM as default policy on all xHC 1.2 or later devices")
Link: https://composter.com.ua/documents/xHCI_Specification_for_USB.pdf
Co-developed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
---
 drivers/usb/host/xhci-pci.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index b9ae5c2a2527..bde43cef8846 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -535,6 +535,8 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
 	/* xHC spec requires PCI devices to support D3hot and D3cold */
 	if (xhci->hci_version >= 0x120)
 		xhci->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
+	else if (pdev->vendor == PCI_VENDOR_ID_AMD && xhci->hci_version >= 0x110)
+		xhci->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
 
 	if (xhci->quirks & XHCI_RESET_ON_RESUME)
 		xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
-- 
2.25.1


  parent reply	other threads:[~2023-10-19 10:28 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-10-19 10:29 [PATCH 00/19] xhci features for usb-next Mathias Nyman
2023-10-19 10:29 ` [PATCH 01/19] xhci: pass port structure to tracing instead of port number Mathias Nyman
2023-10-19 10:29 ` [PATCH 02/19] xhci: Add busnumber to port tracing Mathias Nyman
2023-10-19 10:29 ` [PATCH 03/19] xhci: expand next_trb() helper to support more ring types Mathias Nyman
2023-10-19 10:29 ` [PATCH 04/19] xhci: Set DESI bits in ERDP register correctly Mathias Nyman
2023-10-19 10:29 ` [PATCH 05/19] xhci: Use more than one Event Ring segment Mathias Nyman
2023-10-19 10:29 ` [PATCH 06/19] xhci: Adjust segment numbers after ring expansion Mathias Nyman
2023-10-19 10:29 ` [PATCH 07/19] xhci: Update last segment pointer after Event Ring expansion Mathias Nyman
2023-10-19 10:29 ` [PATCH 08/19] xhci: Expose segment numbers in debugfs Mathias Nyman
2023-10-19 10:29 ` [PATCH 09/19] xhci: Clean up ERST_PTR_MASK inversion Mathias Nyman
2023-10-19 10:29 ` [PATCH 10/19] xhci: Clean up stale comment on ERST_SIZE macro Mathias Nyman
2023-10-19 10:29 ` [PATCH 11/19] xhci: Clean up xhci_{alloc,free}_erst() declarations Mathias Nyman
2023-10-19 10:29 ` [PATCH 12/19] xhci: simplify event ring dequeue tracking for transfer events Mathias Nyman
2023-10-19 10:29 ` [PATCH 13/19] xhci: Simplify event ring dequeue pointer update for port change events Mathias Nyman
2023-10-19 10:29 ` Mathias Nyman [this message]
2023-10-19 10:29 ` [PATCH 15/19] xhci: Enable RPM on controllers that support low-power states Mathias Nyman
2023-10-19 10:29 ` [PATCH 16/19] xhci: split free interrupter into separate remove and free parts Mathias Nyman
2023-10-19 10:29 ` [PATCH 17/19] usb: xhci: Implement xhci_handshake_check_state() helper Mathias Nyman
2023-10-19 10:29 ` [PATCH 18/19] usb: host: xhci-plat: fix possible kernel oops while resuming Mathias Nyman
2023-10-19 10:29 ` [PATCH 19/19] usb: host: xhci: Avoid XHCI resume delay if SSUSB device is not present Mathias Nyman

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