Added dedicated mouse work queue option

app/CMakeLists.txt

@@ -28,6 +28,7 @@ target_sources(app PRIVATE src/kscan.c)
 target_sources(app PRIVATE src/matrix_transform.c)
 target_sources(app PRIVATE src/hid.c)
 target_sources(app PRIVATE src/mouse/key_listener.c)
+target_sources(app PRIVATE src/mouse/main.c)
 target_sources(app PRIVATE src/mouse/tick_listener.c)
 target_sources(app PRIVATE src/sensors.c)
 target_sources_ifdef(CONFIG_ZMK_WPM app PRIVATE src/wpm.c)

app/Kconfig

@@ -327,6 +327,13 @@ endif
 #Display/LED Options
 endmenu
 
+menu "Mouse Options"
+
+rsource "src/mouse/Kconfig"
+
+#Mouse Options
+endmenu
+
 menu "Power Management"
 
 config ZMK_IDLE_TIMEOUT

app/include/zmk/mouse.h

@@ -25,3 +25,6 @@ struct vector2d {
     float x;
     float y;
 };
+
+struct k_work_q *zmk_mouse_work_q();
+int zmk_mouse_init();

app/src/main.c

@@ -29,4 +29,8 @@ void main(void) {
 #ifdef CONFIG_ZMK_DISPLAY
     zmk_display_init();
 #endif /* CONFIG_ZMK_DISPLAY */
+
+#ifdef CONFIG_ZMK_MOUSE
+    zmk_mouse_init();
+#endif /* CONFIG_ZMK_MOUSE */
 }

app/src/mouse/Kconfig

@@ -0,0 +1,34 @@
+# Copyright (c) 2021 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+menuconfig ZMK_MOUSE
+    bool "Enable ZMK mouse emulation"
+    default n
+
+if ZMK_MOUSE
+
+choice ZMK_MOUSE_WORK_QUEUE
+    prompt "Work queue selection for mouse events"
+    default ZMK_MOUSE_WORK_QUEUE_DEDICATED
+
+config ZMK_MOUSE_WORK_QUEUE_SYSTEM
+    bool "Use default system work queue for mouse events"
+
+config ZMK_MOUSE_WORK_QUEUE_DEDICATED
+    bool "Use dedicated work queue for mouse events"
+
+endchoice
+
+if ZMK_MOUSE_WORK_QUEUE_DEDICATED
+
+config ZMK_MOUSE_DEDICATED_THREAD_STACK_SIZE
+    int "Stack size for dedicated mouse thread/queue"
+    default 2048
+
+config ZMK_MOUSE_DEDICATED_THREAD_PRIORITY
+    int "Thread priority for dedicated mouse thread/queue"
+    default 5
+
+endif # ZMK_MOUSE_WORK_QUEUE_DEDICATED
+
+endif

app/src/mouse/key_listener.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020 The ZMK Contributors
+ * Copyright (c) 2021 The ZMK Contributors
  *
  * SPDX-License-Identifier: MIT
  */
@@ -37,7 +37,9 @@ static void mouse_tick_timer_handler(struct k_work *work) {
 
 K_WORK_DEFINE(mouse_tick, &mouse_tick_timer_handler);
 
-void mouse_timer_cb(struct k_timer *dummy) { k_work_submit(&mouse_tick); }
+void mouse_timer_cb(struct k_timer *dummy) {
+    k_work_submit_to_queue(zmk_mouse_work_q(), &mouse_tick);
+}
 
 K_TIMER_DEFINE(mouse_timer, mouse_timer_cb, mouse_timer_cb);
 

app/src/mouse/main.c

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <kernel.h>
+#include <init.h>
+#include <device.h>
+#include <devicetree.h>
+
+#if IS_ENABLED(CONFIG_ZMK_MOUSE_WORK_QUEUE_DEDICATED)
+
+K_THREAD_STACK_DEFINE(mouse_work_stack_area, CONFIG_ZMK_MOUSE_DEDICATED_THREAD_STACK_SIZE);
+
+static struct k_work_q mouse_work_q;
+
+struct k_work_q *zmk_mouse_work_q() {
+    return &mouse_work_q;
+}
+
+#else
+
+struct k_work_q *zmk_mouse_work_q() {
+    return &k_sys_work_q;
+}
+
+#endif
+
+int zmk_mouse_init() {
+#if IS_ENABLED(CONFIG_ZMK_MOUSE_WORK_QUEUE_DEDICATED)
+    k_work_q_start(&mouse_work_q, mouse_work_stack_area,
+                   K_THREAD_STACK_SIZEOF(mouse_work_stack_area),
+                   CONFIG_ZMK_MOUSE_DEDICATED_THREAD_PRIORITY);
+#endif
+    return 0;
+}