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Add a hack to find the hidraw device for the logitech recievers

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Their device is two parents up from the event node.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Peter Hutterer
2015-08-20 14:20:39 +10:00
parent 2cbba23010
commit 589f249c95
1 changed files with 18 additions and 1 deletions
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19
src/libratbag.c
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@@ -134,15 +134,22 @@ udev_find_hidraw(struct ratbag *ratbag, struct ratbag_device *device)
struct udev_list_entry *entry;
struct udev_device *udev_device;
const char *path, *sysname;
struct udev_device *hid_udev;
struct udev_device *hid_udev, *hid_udev2;
struct udev_device *hidraw_udev = NULL;
struct udev *udev = ratbag->udev;
struct udev_device *dummy;
hid_udev = udev_device_get_parent_with_subsystem_devtype(device->udev_device, "hid", NULL);
if (!hid_udev)
return NULL;
/* FIXME: hack for logitech devices where the true hidraw device is two
* parents up */
hid_udev2 = udev_device_get_parent_with_subsystem_devtype(hid_udev, "hid", NULL);
if (hid_udev2)
hid_udev = hid_udev2;
e = udev_enumerate_new(udev);
udev_enumerate_add_match_subsystem(e, "hidraw");
udev_enumerate_add_match_parent(e, hid_udev);
@@ -159,6 +166,13 @@ udev_find_hidraw(struct ratbag *ratbag, struct ratbag_device *device)
continue;
}
/* FIXME: second part of the hack. the enumerate gives us
* multiple hidraw devices but only the one directly below
* our parent is the one we want */
dummy = udev_device_get_parent_with_subsystem_devtype(udev_device, "hid", NULL);
if (!streq(udev_device_get_syspath(dummy), udev_device_get_syspath(hid_udev)))
continue;
hidraw_udev = udev_device_ref(udev_device);
udev_device_unref(udev_device);
@@ -168,6 +182,9 @@ udev_find_hidraw(struct ratbag *ratbag, struct ratbag_device *device)
out:
udev_enumerate_unref(e);
if (hidraw_udev)
log_debug(ratbag, "hidraw device is %s\n", udev_device_get_syspath(hidraw_udev));
return hidraw_udev;
}