Replace Call Mute with random key for micmute

Replace the Windows specific key with an arbitrary keycode to remap to
micmute on Linux.

Signed-off-by: Tim Crawford <tcrawford@system76.com>

src/board/system76/common/kbscan.c

@@ -255,18 +255,6 @@ bool kbscan_press(uint16_t key, bool pressed, uint8_t *layer) {
                 }
             }
             break;
-        case COMBO_CALL_MUTE:
-            if (kbscan_enabled) {
-                if (pressed) {
-                    kbc_scancode(K_LEFT_SUPER, true);
-                    kbc_scancode(K_LEFT_ALT, true);
-                    kbc_scancode(K_K, true);
-                    kbc_scancode(K_LEFT_SUPER, false);
-                    kbc_scancode(K_LEFT_ALT, false);
-                    kbc_scancode(K_K, false);
-                }
-            }
-            break;
         }
         break;
     case (KT_SCI):
@@ -306,16 +294,17 @@ bool kbscan_press(uint16_t key, bool pressed, uint8_t *layer) {
 
 static inline bool key_should_repeat(uint16_t key) {
     switch (key) {
-    case K_TOUCHPAD:
     case K_AIRPLANE_MODE:
     case K_CAMERA_TOGGLE:
     case K_DISPLAY_TOGGLE:
     case K_FAN_TOGGLE:
-    case K_SUSPEND:
     case K_KBD_BKL:
     case K_KBD_COLOR:
     case K_KBD_TOGGLE:
+    case K_MIC_MUTE:
     case K_PAUSE:
+    case K_SUSPEND:
+    case K_TOUCHPAD:
         return false;
     }
 

src/common/include/common/keymap.h

@@ -57,9 +57,6 @@ uint16_t keymap_translate(uint16_t key);
 #define K_PRINT_SCREEN (KT_COMBO | COMBO_PRINT_SCREEN)
 #define COMBO_PAUSE 2
 #define K_PAUSE (KT_COMBO | COMBO_PAUSE)
-// Windows 11 22H2 "Call Mute" hotkey
-#define COMBO_CALL_MUTE 3
-#define K_CALL_MUTE (KT_COMBO | COMBO_CALL_MUTE)
 
 // SCI
 #define KT_SCI (0x4000)
@@ -111,6 +108,9 @@ uint16_t keymap_translate(uint16_t key);
 // Custom scancode
 #define K_TOUCHPAD (KF_E0 | 0x63)
 
+// Mic mute
+#define K_MIC_MUTE (0xC0)
+
 // Function keys
 
 #define K_F1 (0x05)

src/keyboard/system76/15in_102/keymap/darp9.c

@@ -1,10 +1,9 @@
 // SPDX-License-Identifier: GPL-3.0-only
 
 // Darter Pro 9 layout
-// Nearly identical to the default layout. Replaces `K_KBD_COLOR` with
+// Differences from the default layout:
-// `K_KBD_BKL` as the RGB keyboard option was removed. Replaces
+// - Replaces `K_KBD_COLOR` with `K_KBD_BKL` as the RGB keyboard option was removed
-// `K_DISPLAY_TOGGLE` with `K_CALL_MUTE` to match new keyboard legends and
+// - Replaces `K_DISPLAY_TOGGLE` with `K_MIC_MUTE` to match new keyboard legends
-// proprietary firmware behavior.
 
 #include <board/keymap.h>
 
@@ -19,7 +18,7 @@ LAYOUT(
     K_LEFT_CTRL, KT_FN, K_LEFT_SUPER, K_LEFT_ALT, K_SPACE, K_RIGHT_ALT, K_APP, K_RIGHT_CTRL, K_LEFT, K_DOWN, K_RIGHT, K_NUM_0, K_NUM_PERIOD
 ),
 LAYOUT(
-    K_ESC, K_TOUCHPAD, K_CALL_MUTE, K_MUTE, K_F4, K_VOLUME_DOWN, K_VOLUME_UP, K_DISPLAY_MODE, K_BRIGHTNESS_DOWN, K_BRIGHTNESS_UP, K_CAMERA_TOGGLE, K_AIRPLANE_MODE, K_SUSPEND, K_PRINT_SCREEN, K_SCROLL_LOCK, K_DEL, K_HOME, K_END, K_PAUSE, K_PAUSE,
+    K_ESC, K_TOUCHPAD, K_MIC_MUTE, K_MUTE, K_F4, K_VOLUME_DOWN, K_VOLUME_UP, K_DISPLAY_MODE, K_BRIGHTNESS_DOWN, K_BRIGHTNESS_UP, K_CAMERA_TOGGLE, K_AIRPLANE_MODE, K_SUSPEND, K_PRINT_SCREEN, K_SCROLL_LOCK, K_DEL, K_HOME, K_END, K_PAUSE, K_PAUSE,
     K_PLAY_PAUSE, K_FAN_TOGGLE, K_2, K_3, K_4, K_5, K_6, K_7, K_8, K_9, K_0, K_MINUS, K_EQUALS, K_BKSP, K_NUM_LOCK, K_KBD_BKL, K_KBD_TOGGLE, K_KBD_DOWN,
     K_TAB, K_Q, K_W, K_E, K_R, K_T, K_Y, K_U, K_I, K_O, K_P, K_BRACE_OPEN, K_BRACE_CLOSE, K_BACKSLASH, K_NUM_7, K_NUM_8, K_NUM_9, K_KBD_UP,
     K_CAPS, K_A, K_S, K_D, K_F, K_G, K_H, K_J, K_K, K_L, K_SEMICOLON, K_QUOTE, K_ENTER, K_NUM_4, K_NUM_5, K_NUM_6,