keyboard: improve documentation

include/wlr/types/wlr_keyboard.h

@@ -116,12 +116,27 @@ bool wlr_keyboard_set_keymap(struct wlr_keyboard *kb,
 bool wlr_keyboard_keymaps_match(struct xkb_keymap *km1, struct xkb_keymap *km2);
 
 /**
- * Sets the keyboard repeat info. `rate` is in key repeats/second and delay is
- * in milliseconds.
+ * Set the keyboard repeat info.
+ *
+ * rate is in key repeats/second and delay is in milliseconds.
+ */
+void wlr_keyboard_set_repeat_info(struct wlr_keyboard *kb, int32_t rate_hz,
+	int32_t delay_ms);
+
+/**
+ * Update the LEDs on the device, if any.
+ *
+ * leds is a bitmask of enum wlr_keyboard_led.
+ *
+ * If the device doesn't have the provided LEDs, this function is a no-op.
  */
-void wlr_keyboard_set_repeat_info(struct wlr_keyboard *kb, int32_t rate,
-	int32_t delay);
 void wlr_keyboard_led_update(struct wlr_keyboard *keyboard, uint32_t leds);
+
+/**
+ * Get the set of currently depressed or latched modifiers.
+ *
+ * A bitmask of enum wlr_keyboard_modifier is returned.
+ */
 uint32_t wlr_keyboard_get_modifiers(struct wlr_keyboard *keyboard);
 
 #endif