[PATCH v5 2/7] PCI: Move check for old Apple Thunderbolt controllers into a quirk

[Mario Limonciello]

`pci_bridge_d3_possible` currently checks explicitly for a Thunderbolt
controller to indicate that D3 is possible.

This is used solely for older Apple systems, due to a variety of factors:
* Apple used SW connection manager from the beginning, other manufacturers
  used a FW connection manager (ICM)
* Apple supported D3 initially, other manfuacturers didn't introduced this
  until the `HotplugSupportInD3` _DSD was introduced in ~2015.

Apple has stopped creating new machines with Intel Thunderbolt controllers,
and all other manufacturers now support D3 via `HotPlugSupportInD3` so
this should be a fixed list.

Suggested-by: Mika Westerberg <mika.westerberg at linux.intel.com>
Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
 drivers/pci/pci.c    | 17 +++++++----
 drivers/pci/quirks.c | 67 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 79 insertions(+), 5 deletions(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 9ecce435fb3f..01557c950c9f 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1064,7 +1064,18 @@ static inline bool platform_pci_bridge_d3(struct pci_dev *dev)
 	if (pci_use_mid_pm())
 		return false;
 
-	return acpi_pci_bridge_d3(dev);
+	if (acpi_pci_bridge_d3(dev))
+		return true;
+
+	/*
+	 * This is for Apple machines via a quirk
+	 * Non-Apple machines will use the ACPI property with the same name
+	 * from `acpi_pci_bridge_d3` to indciate support.
+	 */
+	if (device_property_read_bool(&dev->dev, "HotPlugSupportInD3"))
+		return true;
+
+	return false;
 }
 
 /**
@@ -2954,10 +2965,6 @@ bool pci_bridge_d3_possible(struct pci_dev *bridge)
 		if (pci_bridge_d3_force)
 			return true;
 
-		/* Even the oldest 2010 Thunderbolt controller supports D3. */
-		if (bridge->is_thunderbolt)
-			return true;
-
 		/* Platform might know better if the bridge supports D3 */
 		if (platform_pci_bridge_d3(bridge))
 			return true;
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index ceeca7d8dd90..f74f50ea0695 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3756,6 +3756,73 @@ DECLARE_PCI_FIXUP_SUSPEND_LATE(PCI_VENDOR_ID_INTEL,
 			       quirk_apple_poweroff_thunderbolt);
 #endif
 
+/*
+ * The first machines supporting Intel Thunderbolt were released by Apple, and
+ * supported a software based connection manager including D3 support, as far
+ * back as 2010. These machines don't have ACPI companions to declare D3
+ * support.
+ *
+ * Other manufacturers introduced Thunderbolt shortly after but notably did not
+ * support:
+ * - Software based connection manager
+ * - Runtime power management
+ * Power management was handled via the BIOS when nothing was plugged in.
+ * Runtime D3 was later introduced in ~2015 and Microsoft declared when the
+ * `HotPlugSupportInD3` _DSD was present that they would support D3.
+ *
+ * This list is expected to be complete and not grow in the future as Apple
+ * has stopped producing new x86 models with Intel Thunderbolt controllers.
+ */
+static void quirk_apple_d3_thunderbolt(struct pci_dev *dev)
+{
+	struct property_entry properties[] = {
+		PROPERTY_ENTRY_BOOL("HotPlugSupportInD3"),
+		{},
+	};
+
+	if (!x86_apple_machine)
+		return;
+
+	if (device_create_managed_software_node(&dev->dev, properties, NULL))
+		pci_warn(dev, "could not add HotPlugSupportInD3 property");
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LIGHT_RIDGE,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_EAGLE_RIDGE,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LIGHT_PEAK,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_2C,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PORT_RIDGE,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_REDWOOD_RIDGE_2C_NHI,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_REDWOOD_RIDGE_2C_BRIDGE,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_REDWOOD_RIDGE_4C_NHI,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_REDWOOD_RIDGE_4C_BRIDGE,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_NHI,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_BRIDGE,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_NHI,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_BRIDGE,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_NHI,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_BRIDGE,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_NHI,
+			quirk_apple_d3_thunderbolt);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_BRIDGE,
+			quirk_apple_d3_thunderbolt);
+
 /*
  * Following are device-specific reset methods which can be used to
  * reset a single function if other methods (e.g. FLR, PM D0->D3) are
-- 
2.34.1