The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. Thanks, Sasha ------------------ original commit in Linus's tree ------------------ >From e0bff43220925b7e527f9d3bc9f5c624177c959e Mon Sep 17 00:00:00 2001 From: Marcin Bachry <hegel666@xxxxxxxxx> Date: Wed, 21 Jul 2021 22:58:58 -0400 Subject: [PATCH] PCI: Increase D3 delay for AMD Renoir/Cezanne XHCI The Renoir XHCI controller apparently doesn't resume reliably with the standard D3hot-to-D0 delay. Increase it to 20ms. [Alex: I talked to the AMD USB hardware team and the AMD Windows team and they are not aware of any HW errata or specific issues. The HW works fine in Windows. I was told Windows uses a rather generous default delay of 100ms for PCI state transitions.] Link: https://lore.kernel.org/r/20210722025858.220064-1-alexander.deucher@xxxxxxx Signed-off-by: Marcin Bachry <hegel666@xxxxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Cc: Mario Limonciello <mario.limonciello@xxxxxxx> Cc: Prike Liang <prike.liang@xxxxxxx> Cc: Shyam Sundar S K <shyam-sundar.s-k@xxxxxxx> --- drivers/pci/quirks.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 6d74386eadc2..ab3de1551b50 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -1900,6 +1900,7 @@ static void quirk_ryzen_xhci_d3hot(struct pci_dev *dev) } DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15e0, quirk_ryzen_xhci_d3hot); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15e1, quirk_ryzen_xhci_d3hot); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1639, quirk_ryzen_xhci_d3hot); #ifdef CONFIG_X86_IO_APIC static int dmi_disable_ioapicreroute(const struct dmi_system_id *d) -- 2.30.2
