This is a note to let you know that I've just added the patch titled
xhci: Loosen RPM as default policy to cover for AMD xHC 1.1
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
xhci-loosen-rpm-as-default-policy-to-cover-for-amd-x.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit be53d5b065169ec880b6a5063b124a4bd529df9e
Author: Basavaraj Natikar <Basavaraj.Natikar@xxxxxxx>
Date: Thu Oct 19 13:29:19 2023 +0300
xhci: Loosen RPM as default policy to cover for AMD xHC 1.1
[ Upstream commit 4baf1218150985ee3ab0a27220456a1f027ea0ac ]
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@xxxxxxx>
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@xxxxxxx>
Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20231019102924.2797346-15-mathias.nyman@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 8034e643a4afd..7d0c2cccbfc0f 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -345,6 +345,8 @@ 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,
