[PATCH 2/4] winebus.sys: add device_desc.has_hid_input_relative

[Tuomas Räsänen]

From: Tuomas Räsänen

device_desc.has_hid_input_relative is TRUE if the device has HID
subsystem ancestor AND the HID ancestor has input subsystem
descendant.

A simplified example subsystem hierarchy view for a standard USB HID input
device:

USB +--> HID +--> hidraw hidraw0
             |
             +--> input input0

In this case, device_desc.has_hid_input_relative = TRUE for hidraw0.

A simplified example subsystem hierarchy view for a non-input USB HID
device (e.g. USB HID Thermometer):

USB +--> HID +--> hidraw hidraw0

In this case, device_desc.has_hid_input_relative = FALSE for hidraw0.
---
 dlls/winebus.sys/bus_udev.c | 52 +++++++++++++++++++++++++++++++++++++
 dlls/winebus.sys/unixlib.h  |  5 ++--
 2 files changed, 55 insertions(+), 2 deletions(-)

diff --git a/dlls/winebus.sys/bus_udev.c b/dlls/winebus.sys/bus_udev.c
index f8c6ccb9060..fc1a5133423 100644
--- a/dlls/winebus.sys/bus_udev.c
+++ b/dlls/winebus.sys/bus_udev.c
@@ -1284,6 +1284,54 @@ static void hidraw_set_quirks(struct hidraw_device *impl, DWORD bus_type, WORD v
         impl->quirks |= QUIRK_DUALSENSE_BT;
 }

+#ifdef HAS_PROPER_INPUT_HEADER
+static BOOL has_hid_input_relative(struct udev_device *dev)
+{
+    struct udev_device *hid_parent;
+    struct udev_enumerate *enumerate;
+    BOOL retval = FALSE;
+
+    hid_parent = udev_device_get_parent_with_subsystem_devtype(dev, "hid", NULL);
+    if (!hid_parent)
+    {
+        TRACE("Device '%s' does not have 'hid' subsystem parent.\n", udev_device_get_syspath(hid_parent));
+        return FALSE;
+    }
+
+    enumerate = udev_enumerate_new(udev_context);
+    if (!enumerate)
+    {
+        ERR("Failed to create udev enumeration object.\n");
+        return FALSE;
+    }
+
+    if (udev_enumerate_add_match_subsystem(enumerate, "input") < 0)
+    {
+        ERR("Failed to add subsystem 'input' match to enumeration.\n");
+        goto out;
+    }
+
+    if (udev_enumerate_add_match_parent(enumerate, hid_parent) < 0)
+    {
+        ERR("Failed to add parent '%s' match to enumeration.\n", udev_device_get_syspath(hid_parent));
+        goto out;
+    }
+
+    if (udev_enumerate_scan_devices(enumerate) < 0)
+    {
+        ERR("Failed to scan devices.\n");
+        goto out;
+    }
+
+    retval = udev_enumerate_get_list_entry(enumerate) != NULL;
+out:
+    udev_enumerate_unref(enumerate);
+    enumerate = NULL;
+
+    return retval;
+}
+#endif
+
 static void udev_add_device(struct udev_device *dev, int fd)
 {
     struct device_desc desc =
@@ -1313,6 +1361,10 @@ static void udev_add_device(struct udev_device *dev, int fd)
     get_device_subsystem_info(dev, "input", &desc, &bus);
     get_device_subsystem_info(dev, "usb", &desc, &bus);

+#ifdef HAS_PROPER_INPUT_HEADER
+    desc.has_hid_input_relative = has_hid_input_relative(dev);
+#endif
+
     subsystem = udev_device_get_subsystem(dev);
     if (!strcmp(subsystem, "hidraw"))
     {
diff --git a/dlls/winebus.sys/unixlib.h b/dlls/winebus.sys/unixlib.h
index 80852696dd1..c228dd88769 100644
--- a/dlls/winebus.sys/unixlib.h
+++ b/dlls/winebus.sys/unixlib.h
@@ -39,6 +39,7 @@ struct device_desc
     UINT uid;
     BOOL is_gamepad;
     BOOL is_hidraw;
+    BOOL has_hid_input_relative;

WCHAR manufacturer[MAX_PATH];
     WCHAR product[MAX_PATH];
@@ -148,8 +149,8 @@ enum unix_funcs
 static inline const char *debugstr_device_desc(struct device_desc *desc)
 {
     if (!desc) return "(null)";
-    return wine_dbg_sprintf("{vid %04x, pid %04x, version %04x, input %d, uid %08x, is_gamepad %u, is_hidraw %u}",
-                            desc->vid, desc->pid, desc->version, desc->input, desc->uid, desc->is_gamepad, desc->is_hidraw);
+    return wine_dbg_sprintf("{vid %04x, pid %04x, version %04x, input %d, uid %08x, is_gamepad %u, is_hidraw %u, has_hid_input_relative %u}",
+                            desc->vid, desc->pid, desc->version, desc->input, desc->uid, desc->is_gamepad, desc->is_hidraw, desc->has_hid_input_relative);
 }

static inline BOOL is_xbox_gamepad(WORD vid, WORD pid)