21 files changed, 35 insertions, 25 deletions
diff --git a/quantum/action_util.c b/quantum/action_util.c
index 78e02aec18..7e30593fb1 100644
--- a/quantum/action_util.c
+++ b/quantum/action_util.c
@@ -21,6 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "action_layer.h"
 #include "timer.h"
 #include "keycode_config.h"
+#include <string.h>
 
 extern keymap_config_t keymap_config;
 
@@ -247,7 +248,13 @@ void send_keyboard_report(void) {
     keyboard_report->mods |= weak_override_mods;
 #endif
 
-    host_keyboard_send(keyboard_report);
+    static report_keyboard_t last_report;
+
+    /* Only send the report if there are changes to propagate to the host. */
+    if (memcmp(keyboard_report, &last_report, sizeof(report_keyboard_t)) != 0) {
+        memcpy(&last_report, keyboard_report, sizeof(report_keyboard_t));
+        host_keyboard_send(keyboard_report);
+    }
 }
 
 /** \brief Get mods
diff --git a/quantum/audio/audio.c b/quantum/audio/audio.c
index 49bb309e80..b3d6389dd5 100644
--- a/quantum/audio/audio.c
+++ b/quantum/audio/audio.c
@@ -160,6 +160,8 @@ void audio_toggle(void) {
     eeconfig_update_audio(audio_config.raw);
     if (audio_config.enable) {
         audio_on_user();
+    } else {
+        audio_off_user();
     }
 }
 
@@ -172,6 +174,7 @@ void audio_on(void) {
 
 void audio_off(void) {
     PLAY_SONG(audio_off_song);
+    audio_off_user();
     wait_ms(100);
     audio_stop_all();
     audio_config.enable = 0;
diff --git a/quantum/debounce.h b/quantum/debounce.h
index 5043868289..3532d9cd7b 100644
--- a/quantum/debounce.h
+++ b/quantum/debounce.h
@@ -6,8 +6,6 @@
 // changed is true if raw has changed since the last call
 void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed);
 
-bool debounce_active(void);
-
 void debounce_init(uint8_t num_rows);
 
 void debounce_free(void);
diff --git a/quantum/debounce/asym_eager_defer_pk.c b/quantum/debounce/asym_eager_defer_pk.c
index 81f39383c4..b1eb4a2b7b 100644
--- a/quantum/debounce/asym_eager_defer_pk.c
+++ b/quantum/debounce/asym_eager_defer_pk.c
@@ -165,7 +165,6 @@ static void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], ui
     }
 }
 
-bool debounce_active(void) { return true; }
 #else
 #    include "none.c"
 #endif
diff --git a/quantum/debounce/none.c b/quantum/debounce/none.c
index b03892bc5b..8a85cc04a8 100644
--- a/quantum/debounce/none.c
+++ b/quantum/debounce/none.c
@@ -26,6 +26,4 @@ void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool
     }
 }
 
-bool debounce_active(void) { return false; }
-
 void debounce_free(void) {}
diff --git a/quantum/debounce/sym_defer_g.c b/quantum/debounce/sym_defer_g.c
index 9155eb914c..8cac1c37f9 100644
--- a/quantum/debounce/sym_defer_g.c
+++ b/quantum/debounce/sym_defer_g.c
@@ -44,8 +44,6 @@ void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool
     }
 }
 
-bool debounce_active(void) { return debouncing; }
-
 void debounce_free(void) {}
 #else  // no debouncing.
 #    include "none.c"
diff --git a/quantum/debounce/sym_defer_pk.c b/quantum/debounce/sym_defer_pk.c
index 1b698ba347..9dee29e28e 100644
--- a/quantum/debounce/sym_defer_pk.c
+++ b/quantum/debounce/sym_defer_pk.c
@@ -134,7 +134,6 @@ static void start_debounce_counters(matrix_row_t raw[], matrix_row_t cooked[], u
     }
 }
 
-bool debounce_active(void) { return true; }
 #else
 #    include "none.c"
 #endif
diff --git a/quantum/debounce/sym_eager_pk.c b/quantum/debounce/sym_eager_pk.c
index 9da000ea9a..deec463649 100644
--- a/quantum/debounce/sym_eager_pk.c
+++ b/quantum/debounce/sym_eager_pk.c
@@ -140,7 +140,6 @@ static void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], ui
     }
 }
 
-bool debounce_active(void) { return true; }
 #else
 #    include "none.c"
 #endif
diff --git a/quantum/debounce/sym_eager_pr.c b/quantum/debounce/sym_eager_pr.c
index eda92a263b..29b0cabefb 100644
--- a/quantum/debounce/sym_eager_pr.c
+++ b/quantum/debounce/sym_eager_pr.c
@@ -132,7 +132,6 @@ static void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], ui
     }
 }
 
-bool debounce_active(void) { return true; }
 #else
 #    include "none.c"
 #endif
diff --git a/quantum/matrix.h b/quantum/matrix.h
index 5c696622fc..1a3f362fba 100644
--- a/quantum/matrix.h
+++ b/quantum/matrix.h
@@ -46,8 +46,6 @@ void matrix_setup(void);
 void matrix_init(void);
 /* scan all key states on matrix */
 uint8_t matrix_scan(void);
-/* whether modified from previous scan. used after matrix_scan. */
-bool matrix_is_modified(void) __attribute__((deprecated));
 /* whether a switch is on */
 bool matrix_is_on(uint8_t row, uint8_t col);
 /* matrix state on row */
diff --git a/quantum/matrix_common.c b/quantum/matrix_common.c
index 66c89970b1..fe1d5b1edd 100644
--- a/quantum/matrix_common.c
+++ b/quantum/matrix_common.c
@@ -45,12 +45,6 @@ inline matrix_row_t matrix_get_row(uint8_t row) {
 #endif
 }
 
-// Deprecated.
-bool matrix_is_modified(void) {
-    if (debounce_active()) return false;
-    return true;
-}
-
 #if (MATRIX_COLS <= 8)
 #    define print_matrix_header() print("\nr/c 01234567\n")
 #    define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
diff --git a/quantum/process_keycode/process_audio.c b/quantum/process_keycode/process_audio.c
index 3b5fa8490b..23664721e8 100644
--- a/quantum/process_keycode/process_audio.c
+++ b/quantum/process_keycode/process_audio.c
@@ -57,3 +57,4 @@ void process_audio_noteoff(uint8_t note) { stop_note(compute_freq_for_midi_note(
 void process_audio_all_notes_off(void) { stop_all_notes(); }
 
 __attribute__((weak)) void audio_on_user() {}
+__attribute__((weak)) void audio_off_user() {}
diff --git a/quantum/process_keycode/process_audio.h b/quantum/process_keycode/process_audio.h
index d89a834ea8..42cfab4af2 100644
--- a/quantum/process_keycode/process_audio.h
+++ b/quantum/process_keycode/process_audio.h
@@ -8,3 +8,4 @@ void process_audio_noteoff(uint8_t note);
 void process_audio_all_notes_off(void);
 
 void audio_on_user(void);
+void audio_off_user(void);
diff --git a/quantum/process_keycode/process_key_lock.c b/quantum/process_keycode/process_key_lock.c
index 4bd58f0c1e..941a2c5780 100644
--- a/quantum/process_keycode/process_key_lock.c
+++ b/quantum/process_keycode/process_key_lock.c
@@ -56,6 +56,11 @@ static inline uint16_t translate_keycode(uint16_t keycode) {
     }
 }
 
+void cancel_key_lock(void) {
+    watching = false;
+    UNSET_KEY_STATE(0x0);
+}
+
 bool process_key_lock(uint16_t *keycode, keyrecord_t *record) {
     // We start by categorizing the keypress event. In the event of a down
     // event, there are several possibilities:
diff --git a/quantum/process_keycode/process_key_lock.h b/quantum/process_keycode/process_key_lock.h
index baa0b39077..5159b0ba02 100644
--- a/quantum/process_keycode/process_key_lock.h
+++ b/quantum/process_keycode/process_key_lock.h
@@ -18,4 +18,5 @@
 
 #include "quantum.h"
 
+void cancel_key_lock(void);
 bool process_key_lock(uint16_t *keycode, keyrecord_t *record);
diff --git a/quantum/process_keycode/process_magic.c b/quantum/process_keycode/process_magic.c
index d5cff4f12a..6332be647c 100644
--- a/quantum/process_keycode/process_magic.c
+++ b/quantum/process_keycode/process_magic.c
@@ -44,6 +44,7 @@ bool process_magic(uint16_t keycode, keyrecord_t *record) {
             case MAGIC_SWAP_CONTROL_CAPSLOCK ... MAGIC_TOGGLE_ALT_GUI:
             case MAGIC_SWAP_LCTL_LGUI ... MAGIC_EE_HANDS_RIGHT:
             case MAGIC_TOGGLE_GUI:
+            case MAGIC_TOGGLE_CONTROL_CAPSLOCK:
                 /* keymap config */
                 keymap_config.raw = eeconfig_read_keymap();
                 switch (keycode) {
@@ -168,6 +169,9 @@ bool process_magic(uint16_t keycode, keyrecord_t *record) {
                     case MAGIC_TOGGLE_GUI:
                         keymap_config.no_gui = !keymap_config.no_gui;
                         break;
+                    case MAGIC_TOGGLE_CONTROL_CAPSLOCK:
+                        keymap_config.swap_control_capslock = !keymap_config.swap_control_capslock;
+                        break;
                 }
 
                 eeconfig_update_keymap(keymap_config.raw);
diff --git a/quantum/process_keycode/process_printer.c b/quantum/process_keycode/process_printer.c
index 82528cc680..0801f078ef 100644
--- a/quantum/process_keycode/process_printer.c
+++ b/quantum/process_keycode/process_printer.c
@@ -16,13 +16,14 @@
 
 #include "process_printer.h"
 #include "action_util.h"
+#include "uart.h"
 
 bool    printing_enabled = false;
 uint8_t character_shift  = 0;
 
 void enable_printing(void) {
     printing_enabled = true;
-    serial_init();
+    uart_init(19200);
 }
 
 void disable_printing(void) { printing_enabled = false; }
@@ -35,7 +36,7 @@ uint8_t shifted_numbers[10] = {0x21, 0x40, 0x23, 0x24, 0x25, 0x5E, 0x26, 0x2A, 0
 
 void print_char(char c) {
     USB_Disable();
-    serial_send(c);
+    uart_write(c);
     USB_Init();
 }
 
diff --git a/quantum/process_keycode/process_printer.h b/quantum/process_keycode/process_printer.h
index 3c6d06ff94..6f4d09f333 100644
--- a/quantum/process_keycode/process_printer.h
+++ b/quantum/process_keycode/process_printer.h
@@ -18,6 +18,4 @@
 
 #include "quantum.h"
 
-#include "protocol/serial.h"
-
 bool process_printer(uint16_t keycode, keyrecord_t *record);
diff --git a/quantum/quantum.c b/quantum/quantum.c
index 35b6351e9d..5ecc183327 100644
--- a/quantum/quantum.c
+++ b/quantum/quantum.c
@@ -263,7 +263,7 @@ bool process_record_quantum(keyrecord_t *record) {
 #ifdef TAP_DANCE_ENABLE
             process_tap_dance(keycode, record) &&
 #endif
-#if defined(UNICODE_ENABLE) || defined(UNICODEMAP_ENABLE) || defined(UCIS_ENABLE)
+#if defined(UNICODE_COMMON_ENABLE)
             process_unicode_common(keycode, record) &&
 #endif
 #ifdef LEADER_ENABLE
@@ -387,7 +387,7 @@ void matrix_init_quantum() {
 #ifdef RGB_MATRIX_ENABLE
     rgb_matrix_init();
 #endif
-#if defined(UNICODE_ENABLE) || defined(UNICODEMAP_ENABLE) || defined(UCIS_ENABLE)
+#if defined(UNICODE_COMMON_ENABLE)
     unicode_input_mode_init();
 #endif
 #ifdef HAPTIC_ENABLE
diff --git a/quantum/quantum.h b/quantum/quantum.h
index 6927884e2f..5d3a665887 100644
--- a/quantum/quantum.h
+++ b/quantum/quantum.h
@@ -109,6 +109,10 @@ extern layer_state_t layer_state;
 #    include "process_unicodemap.h"
 #endif
 
+#ifdef UNICODE_COMMON_ENABLE
+#    include "process_unicode_common.h"
+#endif
+
 #ifdef KEY_OVERRIDE_ENABLE
 #    include "process_key_override.h"
 #endif
diff --git a/quantum/quantum_keycodes.h b/quantum/quantum_keycodes.h
index e4d0167aac..3950a3bcae 100644
--- a/quantum/quantum_keycodes.h
+++ b/quantum/quantum_keycodes.h
@@ -597,6 +597,8 @@ enum quantum_keycodes {
     MACRO_30,
     MACRO_31,
 
+    MAGIC_TOGGLE_CONTROL_CAPSLOCK,
+
     // Start of custom keycode range for keyboards and keymaps - always leave at the end
     SAFE_RANGE
 };
@@ -749,6 +751,7 @@ enum quantum_keycodes {
 #define CL_NORM MAGIC_UNSWAP_CONTROL_CAPSLOCK
 #define CL_CTRL MAGIC_CAPSLOCK_TO_CONTROL
 #define CL_CAPS MAGIC_UNCAPSLOCK_TO_CONTROL
+#define CL_TOGG MAGIC_TOGGLE_CONTROL_CAPSLOCK
 
 #define LCG_SWP MAGIC_SWAP_LCTL_LGUI
 #define LCG_NRM MAGIC_UNSWAP_LCTL_LGUI