[ACPI] Report a docking device to the system

Author: EricKohl

drivers/bus/acpi/buspdo.c

@@ -419,6 +419,10 @@ Bus_PDO_QueryDeviceCaps(
        deviceCapabilities->Address = device->pnp.bus_address;
     }
 
+    if (DeviceData->DockDevice)
+        deviceCapabilities->DockDevice = TRUE;
+    DPRINT("DockDevice: %u\n", deviceCapabilities->DockDevice);
+
     if (!device ||
         (device->flags.hardware_id &&
          (strstr(device->pnp.hardware_id, ACPI_BUTTON_HID_LID) ||

drivers/bus/acpi/include/acpisys.h

@@ -42,6 +42,7 @@ typedef struct _PDO_DEVICE_DATA
     // An array of (zero terminated wide character strings).
     // The array itself also null terminated
     PWCHAR      HardwareIDs;
+    BOOLEAN     DockDevice;
     // Link point to hold all the PDOs for a single bus together
     LIST_ENTRY  Link;
     ULONG       InterfaceRefCount;

drivers/bus/acpi/pnp.c

@@ -422,6 +422,8 @@ Bus_InitializePdo (
     PPDO_DEVICE_DATA pdoData;
     int acpistate;
     DEVICE_POWER_STATE ntState;
+    ACPI_HANDLE handle = 0;
+    ACPI_STATUS status = 0;
 
     PAGED_CODE ();
 
@@ -468,6 +470,17 @@ Bus_InitializePdo (
     pdoData->Common.DevicePowerState = ntState;
     pdoData->Common.SystemPowerState = FdoData->Common.SystemPowerState;
 
+    /* Identify the dock device */
+    if (pdoData->AcpiHandle)
+    {
+        status = AcpiGetHandle(pdoData->AcpiHandle, "_DCK", &handle);
+        if (ACPI_SUCCESS(status))
+        {
+            DPRINT("Found _DCK method!");
+            pdoData->DockDevice = TRUE;
+        }
+    }
+
     ExAcquireFastMutex (&FdoData->Mutex);
     InsertTailList(&FdoData->ListOfPDOs, &pdoData->Link);
     FdoData->NumPDOs++;