2 files changed, 56 insertions, 6 deletions

diff --git a/quantum/led_matrix.c b/quantum/led_matrix.c
index 69600c498..890573022 100644
--- a/quantum/led_matrix.c
+++ b/quantum/led_matrix.c
@@ -90,6 +90,11 @@ static uint32_t led_timer_buffer;
 static last_hit_t last_hit_buffer;
 #endif  // LED_MATRIX_KEYREACTIVE_ENABLED
 
+// split led matrix
+#if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+const uint8_t k_led_matrix_split[2] = LED_MATRIX_SPLIT;
+#endif
+
 void eeconfig_read_led_matrix(void) { eeprom_read_block(&led_matrix_eeconfig, EECONFIG_LED_MATRIX, sizeof(led_matrix_eeconfig)); }
 
 void eeconfig_update_led_matrix(void) { eeprom_update_block(&led_matrix_eeconfig, EECONFIG_LED_MATRIX, sizeof(led_matrix_eeconfig)); }
@@ -128,22 +133,38 @@ uint8_t led_matrix_map_row_column_to_led(uint8_t row, uint8_t column, uint8_t *l
 void led_matrix_update_pwm_buffers(void) { led_matrix_driver.flush(); }
 
 void led_matrix_set_value(int index, uint8_t value) {
-#ifdef USE_CIE1931_CURVE
-    led_matrix_driver.set_value(index, pgm_read_byte(&CIE1931_CURVE[value]));
-#else
-    led_matrix_driver.set_value(index, value);
+#if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+    if (!is_keyboard_left() && index >= k_led_matrix_split[0])
+#    ifdef USE_CIE1931_CURVE
+        led_matrix_driver.set_value(index - k_led_matrix_split[0], pgm_read_byte(&CIE1931_CURVE[value]));
+#    else
+        led_matrix_driver.set_value(index - k_led_matrix_split[0], value);
+#    endif
+    else if (is_keyboard_left() && index < k_led_matrix_split[0])
 #endif
+#    ifdef USE_CIE1931_CURVE
+        led_matrix_driver.set_value(index, pgm_read_byte(&CIE1931_CURVE[value]));
+#    else
+        led_matrix_driver.set_value(index, value);
+#    endif
 }
 
 void led_matrix_set_value_all(uint8_t value) {
-#ifdef USE_CIE1931_CURVE
-    led_matrix_driver.set_value_all(pgm_read_byte(&CIE1931_CURVE[value]));
+#if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+    for (uint8_t i = 0; i < DRIVER_LED_TOTAL; i++) led_matrix_set_value(i, value);
 #else
+#    ifdef USE_CIE1931_CURVE
+    led_matrix_driver.set_value_all(pgm_read_byte(&CIE1931_CURVE[value]));
+#    else
     led_matrix_driver.set_value_all(value);
+#    endif
 #endif
 }
 
 void process_led_matrix(uint8_t row, uint8_t col, bool pressed) {
+#ifndef LED_MATRIX_SPLIT
+    if (!is_keyboard_master()) return;
+#endif
 #if LED_DISABLE_TIMEOUT > 0
     led_anykey_timer = 0;
 #endif  // LED_DISABLE_TIMEOUT > 0
diff --git a/quantum/split_common/transport.c b/quantum/split_common/transport.c
index 27a1c0d3a..7ea925b51 100644
--- a/quantum/split_common/transport.c
+++ b/quantum/split_common/transport.c
@@ -22,6 +22,9 @@ static pin_t encoders_pad[] = ENCODERS_PAD_A;
 #    define NUMBER_OF_ENCODERS (sizeof(encoders_pad) / sizeof(pin_t))
 #endif
 
+#if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+#    include "led_matrix.h"
+#endif
 #if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
 #    include "rgb_matrix.h"
 #endif
@@ -58,6 +61,10 @@ typedef struct _I2C_slave_buffer_t {
 #    ifdef WPM_ENABLE
     uint8_t current_wpm;
 #    endif
+#    if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+    led_eeconfig_t led_matrix;
+    bool           led_suspend_state;
+#    endif
 #    if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
     rgb_config_t rgb_matrix;
     bool         rgb_suspend_state;
@@ -76,6 +83,8 @@ static I2C_slave_buffer_t *const i2c_buffer = (I2C_slave_buffer_t *)i2c_slave_re
 #    define I2C_RGB_START offsetof(I2C_slave_buffer_t, rgblight_sync)
 #    define I2C_ENCODER_START offsetof(I2C_slave_buffer_t, encoder_state)
 #    define I2C_WPM_START offsetof(I2C_slave_buffer_t, current_wpm)
+#    define I2C_LED_MATRIX_START offsetof(I2C_slave_buffer_t, led_matrix)
+#    define I2C_LED_SUSPEND_START offsetof(I2C_slave_buffer_t, led_suspend_state)
 #    define I2C_RGB_MATRIX_START offsetof(I2C_slave_buffer_t, rgb_matrix)
 #    define I2C_RGB_SUSPEND_START offsetof(I2C_slave_buffer_t, rgb_suspend_state)
 
@@ -151,6 +160,10 @@ bool transport_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[])
 #        endif
 #    endif
 
+#    if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+    i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_LED_MATRIX_START, (void *)led_matrix_eeconfig, sizeof(i2c_buffer->led_matrix), TIMEOUT);
+    i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_LED_SUSPEND_START, (void *)g_suspend_state, sizeof(i2c_buffer->led_suspend_state), TIMEOUT);
+#    endif
 #    if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
     i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_RGB_MATRIX_START, (void *)rgb_matrix_config, sizeof(i2c_buffer->rgb_matrix), TIMEOUT);
     i2c_writeReg(SLAVE_I2C_ADDRESS, I2C_RGB_SUSPEND_START, (void *)g_suspend_state, sizeof(i2c_buffer->rgb_suspend_state), TIMEOUT);
@@ -202,6 +215,10 @@ void transport_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[])
 #        endif
 #    endif
 
+#    if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+    memcpy((void*)i2c_buffer->led_matrix, (void *)led_matrix_eeconfig, sizeof(i2c_buffer->led_matrix));
+    memcpy((void*)i2c_buffer->led_suspend_state, (void *)g_suspend_state, sizeof(i2c_buffer->led_suspend_state));
+#    endif
 #    if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
     memcpy((void *)i2c_buffer->rgb_matrix, (void *)rgb_matrix_config, sizeof(i2c_buffer->rgb_matrix));
     memcpy((void *)i2c_buffer->rgb_suspend_state, (void *)g_suspend_state, sizeof(i2c_buffer->rgb_suspend_state));
@@ -246,6 +263,10 @@ typedef struct _Serial_m2s_buffer_t {
 #    ifdef WPM_ENABLE
     uint8_t      current_wpm;
 #    endif
+#    if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+    led_eeconfig_t led_matrix;
+    bool           led_suspend_state;
+#    endif
 #    if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
     rgb_config_t rgb_matrix;
     bool         rgb_suspend_state;
@@ -368,6 +389,10 @@ bool transport_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[])
 #        endif
 #    endif
 
+#    if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+    serial_m2s_buffer.led_matrix = led_matrix_econfig;
+    serial_m2s_buffer.led_suspend_state = g_suspend_state;
+#    endif
 #    if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
     serial_m2s_buffer.rgb_matrix        = rgb_matrix_config;
     serial_m2s_buffer.rgb_suspend_state = g_suspend_state;
@@ -412,6 +437,10 @@ void transport_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[])
 #        endif
 #    endif
 
+#    if defined(LED_MATRIX_ENABLE) && defined(LED_MATRIX_SPLIT)
+    led_matrix_eeconfig = serial_m2s_buffer.led_matrix;
+    g_suspend_state = serial_m2s_buffer.led_suspend_state;
+#    endif
 #    if defined(RGB_MATRIX_ENABLE) && defined(RGB_MATRIX_SPLIT)
     rgb_matrix_config = serial_m2s_buffer.rgb_matrix;
     g_suspend_state   = serial_m2s_buffer.rgb_suspend_state;