Add i2s mclk (#4885)

esphome/components/i2s_audio/__init__.py

@@ -18,6 +18,7 @@ MULTI_CONF = True
 
 CONF_I2S_DOUT_PIN = "i2s_dout_pin"
 CONF_I2S_DIN_PIN = "i2s_din_pin"
+CONF_I2S_MCLK_PIN = "i2s_mclk_pin"
 CONF_I2S_BCLK_PIN = "i2s_bclk_pin"
 CONF_I2S_LRCLK_PIN = "i2s_lrclk_pin"
 
@@ -44,6 +45,7 @@ CONFIG_SCHEMA = cv.Schema(
         cv.GenerateID(): cv.declare_id(I2SAudioComponent),
         cv.Required(CONF_I2S_LRCLK_PIN): pins.internal_gpio_output_pin_number,
         cv.Optional(CONF_I2S_BCLK_PIN): pins.internal_gpio_output_pin_number,
+        cv.Optional(CONF_I2S_MCLK_PIN): pins.internal_gpio_output_pin_number,
     }
 )
 
@@ -69,3 +71,5 @@ async def to_code(config):
     cg.add(var.set_lrclk_pin(config[CONF_I2S_LRCLK_PIN]))
     if CONF_I2S_BCLK_PIN in config:
         cg.add(var.set_bclk_pin(config[CONF_I2S_BCLK_PIN]))
+    if CONF_I2S_MCLK_PIN in config:
+        cg.add(var.set_mclk_pin(config[CONF_I2S_MCLK_PIN]))

esphome/components/i2s_audio/i2s_audio.h

@@ -21,7 +21,7 @@ class I2SAudioComponent : public Component {
 
   i2s_pin_config_t get_pin_config() const {
     return {
-        .mck_io_num = I2S_PIN_NO_CHANGE,
+        .mck_io_num = this->mclk_pin_,
         .bck_io_num = this->bclk_pin_,
         .ws_io_num = this->lrclk_pin_,
         .data_out_num = I2S_PIN_NO_CHANGE,
@@ -29,6 +29,7 @@ class I2SAudioComponent : public Component {
     };
   }
 
+  void set_mclk_pin(int pin) { this->mclk_pin_ = pin; }
   void set_bclk_pin(int pin) { this->bclk_pin_ = pin; }
   void set_lrclk_pin(int pin) { this->lrclk_pin_ = pin; }
 
@@ -44,6 +45,7 @@ class I2SAudioComponent : public Component {
   I2SAudioIn *audio_in_{nullptr};
   I2SAudioOut *audio_out_{nullptr};
 
+  int mclk_pin_{I2S_PIN_NO_CHANGE};
   int bclk_pin_{I2S_PIN_NO_CHANGE};
   int lrclk_pin_;
   i2s_port_t port_{};

tests/test4.yaml

@@ -666,6 +666,7 @@ touchscreen:
 i2s_audio:
   i2s_lrclk_pin: GPIO26
   i2s_bclk_pin: GPIO27
+  i2s_mclk_pin: GPIO25
 
 media_player:
   - platform: i2s_audio