1 files changed, 48 insertions, 0 deletions
diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c
index f347c20247..b33afb2406 100644
--- a/arch/x86/pci/fixup.c
+++ b/arch/x86/pci/fixup.c
@@ -907,6 +907,54 @@ static void chromeos_fixup_apl_pci_l1ss_capability(struct pci_dev *dev)
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x5ad6, chromeos_save_apl_pci_l1ss_capability);
 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, 0x5ad6, chromeos_fixup_apl_pci_l1ss_capability);
 
+/*
+ * Disable D3cold on Asus B1400 PCI-NVMe bridge
+ *
+ * On this platform with VMD off, the NVMe device cannot successfully power
+ * back on from D3cold. This appears to be an untested transition by the
+ * vendor: Windows leaves the NVMe and parent bridge in D0 during suspend.
+ *
+ * We disable D3cold on the parent bridge for simplicity, and the fact that
+ * both parent bridge and NVMe device share the same power resource.
+ *
+ * This is only needed on BIOS versions before 308; the newer versions flip
+ * StorageD3Enable from 1 to 0.
+ */
+static const struct dmi_system_id asus_nvme_broken_d3cold_table[] = {
+	{
+		.matches = {
+				DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+				DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.304"),
+		},
+	},
+	{
+		.matches = {
+				DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+				DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.305"),
+		},
+	},
+	{
+		.matches = {
+				DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+				DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.306"),
+		},
+	},
+	{
+		.matches = {
+				DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+				DMI_MATCH(DMI_BIOS_VERSION, "B1400CEAE.307"),
+		},
+	},
+	{}
+};
+
+static void asus_disable_nvme_d3cold(struct pci_dev *pdev)
+{
+	if (dmi_check_system(asus_nvme_broken_d3cold_table) > 0)
+		pci_d3cold_disable(pdev);
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x9a09, asus_disable_nvme_d3cold);
+
 #ifdef CONFIG_SUSPEND
 /*
  * Root Ports on some AMD SoCs advertise PME_Support for D3hot and D3cold, but