6.6-stable review patch. If anyone has any objections, please let me know.
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From: Werner Sembach wse@tuxedocomputers.com
commit b1049f2d68693c80a576c4578d96774a68df2bad upstream.
commit 9d26d3a8f1b0 ("PCI: Put PCIe ports into D3 during suspend") sets the policy that all PCIe ports are allowed to use D3. When the system is suspended if the port is not power manageable by the platform and won't be used for wakeup via a PME this sets up the policy for these ports to go into D3hot.
This policy generally makes sense from an OSPM perspective but it leads to problems with wakeup from suspend on the TUXEDO Sirius 16 Gen 1 with a specific old BIOS. This manifests as a system hang.
On the affected Device + BIOS combination, add a quirk for the root port of the problematic controller to ensure that these root ports are not put into D3hot at suspend.
This patch is based on
https://lore.kernel.org/linux-pci/20230708214457.1229-2-mario.limonciello@am...
but with the added condition both in the documentation and in the code to apply only to the TUXEDO Sirius 16 Gen 1 with a specific old BIOS and only the affected root ports.
Fixes: 9d26d3a8f1b0 ("PCI: Put PCIe ports into D3 during suspend") Suggested-by: Mario Limonciello mario.limonciello@amd.com Link: https://lore.kernel.org/r/20250114222436.1075456-1-wse@tuxedocomputers.com Co-developed-by: Georg Gottleuber ggo@tuxedocomputers.com Signed-off-by: Georg Gottleuber ggo@tuxedocomputers.com Signed-off-by: Werner Sembach wse@tuxedocomputers.com Signed-off-by: Krzysztof Wilczyński kwilczynski@kernel.org Cc: stable@vger.kernel.org # 6.1+ Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/x86/pci/fixup.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+)
--- a/arch/x86/pci/fixup.c +++ b/arch/x86/pci/fixup.c @@ -1010,4 +1010,34 @@ DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_ DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1668, amd_rp_pme_resume); DECLARE_PCI_FIXUP_SUSPEND(PCI_VENDOR_ID_AMD, 0x1669, amd_rp_pme_suspend); DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1669, amd_rp_pme_resume); + +/* + * Putting PCIe root ports on Ryzen SoCs with USB4 controllers into D3hot + * may cause problems when the system attempts wake up from s2idle. + * + * On the TUXEDO Sirius 16 Gen 1 with a specific old BIOS this manifests as + * a system hang. + */ +static const struct dmi_system_id quirk_tuxeo_rp_d3_dmi_table[] = { + { + .matches = { + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "TUXEDO"), + DMI_EXACT_MATCH(DMI_BOARD_NAME, "APX958"), + DMI_EXACT_MATCH(DMI_BIOS_VERSION, "V1.00A00_20240108"), + }, + }, + {} +}; + +static void quirk_tuxeo_rp_d3(struct pci_dev *pdev) +{ + struct pci_dev *root_pdev; + + if (dmi_check_system(quirk_tuxeo_rp_d3_dmi_table)) { + root_pdev = pcie_find_root_port(pdev); + if (root_pdev) + root_pdev->dev_flags |= PCI_DEV_FLAGS_NO_D3; + } +} +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1502, quirk_tuxeo_rp_d3); #endif /* CONFIG_SUSPEND */