lineage-rockchip/android_external_libudev-zero
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udev_device.c: more accurate keys/keyboard detection

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This commit is contained in:
illiliti 2021-06-06 10:26:35 +03:00
parent 34f8727f28
commit e23633ec56
1 changed files with 15 additions and 2 deletions
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17
udev_device.c
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@ -403,6 +403,7 @@ static void set_properties_from_evdev(struct udev_device *udev_device)
unsigned long ev_bits[BITS_TO_LONGS(EV_CNT)] = {0}; unsigned long ev_bits[BITS_TO_LONGS(EV_CNT)] = {0};
struct udev_device *parent; struct udev_device *parent;
const char *subsystem; const char *subsystem;
unsigned long bit;
subsystem = udev_device_get_subsystem(udev_device); subsystem = udev_device_get_subsystem(udev_device);
@ -481,13 +482,25 @@ static void set_properties_from_evdev(struct udev_device *udev_device)
} }
} }
// TODO do not assume keyboard if EV_KEY if (!test_bit(ev_bits, EV_KEY)) {
if (test_bit(ev_bits, EV_KEY)) { return;
}
// iterate over key bits until BTN_* block is hit and test if bitmask has KEY_*.
// this way, we can check if device has keys or buttons.
// https://github.com/torvalds/linux/blob/f5b6eb1e018203913dfefcf6fa988649ad11ad6e/include/uapi/linux/input-event-codes.h#L76-L338
for (bit = KEY_ESC; bit < BTN_MISC; bit++) {
if (!test_bit(key_bits, bit)) {
continue;
}
udev_list_entry_add(&udev_device->properties, "ID_INPUT_KEY", "1", 0); udev_list_entry_add(&udev_device->properties, "ID_INPUT_KEY", "1", 0);
if (test_bit(key_bits, KEY_ENTER)) { if (test_bit(key_bits, KEY_ENTER)) {
udev_list_entry_add(&udev_device->properties, "ID_INPUT_KEYBOARD", "1", 0); udev_list_entry_add(&udev_device->properties, "ID_INPUT_KEYBOARD", "1", 0);
} }
return;
} }
} }