diff options
Diffstat (limited to 'drivers/hid/hid-input.c')
| -rw-r--r-- | drivers/hid/hid-input.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index 725f22ca47fc..01c7a08a66e1 100644 --- a/drivers/hid/hid-input.c +++ b/drivers/hid/hid-input.c @@ -312,6 +312,9 @@ static const struct hid_device_id hid_battery_quirks[] = { USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI), HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, + USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO), + HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, + { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI), HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, {} @@ -1101,6 +1104,23 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct return; } + /* + * Ignore reports for absolute data if the data didn't change. This is + * not only an optimization but also fixes 'dead' key reports. Some + * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID + * 0x31 and 0x32) report multiple keys, even though a localized keyboard + * can only have one of them physically available. The 'dead' keys + * report constant 0. As all map to the same keycode, they'd confuse + * the input layer. If we filter the 'dead' keys on the HID level, we + * skip the keycode translation and only forward real events. + */ + if (!(field->flags & (HID_MAIN_ITEM_RELATIVE | + HID_MAIN_ITEM_BUFFERED_BYTE)) && + (field->flags & HID_MAIN_ITEM_VARIABLE) && + usage->usage_index < field->maxusage && + value == field->value[usage->usage_index]) + return; + /* report the usage code as scancode if the key status has changed */ if (usage->type == EV_KEY && !!test_bit(usage->code, input->key) != value) input_event(input, EV_MSC, MSC_SCAN, usage->hid); |