diff --git a/components/driver/i2s/i2s_common.c b/components/driver/i2s/i2s_common.c
index 68e5d14eb1b..1a6db40dc91 100644
--- a/components/driver/i2s/i2s_common.c
+++ b/components/driver/i2s/i2s_common.c
@@ -786,7 +786,7 @@ esp_err_t i2s_check_set_mclk(i2s_port_t id, int gpio_num, i2s_clock_src_t clk_sr
     bool is_apll = clk_src == I2S_CLK_SRC_APLL;
     if (g_i2s.controller[id]->mclk_out_hdl == NULL) {
         soc_clkout_sig_id_t clkout_sig = is_apll ? CLKOUT_SIG_APLL : (is_i2s0 ? CLKOUT_SIG_I2S0 : CLKOUT_SIG_I2S1);
-        ESP_RETURN_ON_ERROR(esp_clock_output_start(clkout_sig, gpio_num, &(g_i2s.controller[id]->mclk_out_hdl)), TAG, "mclk configure failed");
+        ESP_RETURN_ON_ERROR(esp_clock_output_start(clkout_sig, gpio_num, &(g_i2s.controller[id]->mclk_out_hdl)), TAG, "mclk configure failed, note: only gpio 0/1/3 are supported on esp32");
     }
 #else
     ESP_RETURN_ON_FALSE(GPIO_IS_VALID_GPIO(gpio_num), ESP_ERR_INVALID_ARG, TAG, "mck_io_num invalid");
diff --git a/docs/en/api-reference/peripherals/i2s.rst b/docs/en/api-reference/peripherals/i2s.rst
index 7bc53d3a73b..c06eae13d81 100644
--- a/docs/en/api-reference/peripherals/i2s.rst
+++ b/docs/en/api-reference/peripherals/i2s.rst
@@ -99,6 +99,12 @@ Clock Terminology
 
     Normally, MCLK should be the multiple of ``sample rate`` and BCLK at the same time. The field :cpp:member:`i2s_std_clk_config_t::mclk_multiple` indicates the multiple of MCLK to the ``sample rate``. In most cases, ``I2S_MCLK_MULTIPLE_256`` should be enough. However, if ``slot_bit_width`` is set to ``I2S_SLOT_BIT_WIDTH_24BIT``, to keep MCLK a multiple to the BCLK, :cpp:member:`i2s_std_clk_config_t::mclk_multiple` should be set to multiples that are divisible by 3 such as ``I2S_MCLK_MULTIPLE_384``. Otherwise, WS will be inaccurate.
 
+.. only:: esp32
+
+    .. note::
+
+        On ESP32, the MCLK pin must use GPIO0, GPIO1, or GPIO3. The other clock pins (e.g., BCLK, WS) can use any valid GPIO. Note that GPIO0 is generally not recommended for other functions because it is a strapping pin.
+
 .. _i2s-communication-mode:
 
 I2S Communication Mode
diff --git a/docs/zh_CN/api-reference/peripherals/i2s.rst b/docs/zh_CN/api-reference/peripherals/i2s.rst
index 61ed3f1cbf2..c986cd4aa5d 100644
--- a/docs/zh_CN/api-reference/peripherals/i2s.rst
+++ b/docs/zh_CN/api-reference/peripherals/i2s.rst
@@ -99,6 +99,12 @@ I2S 时钟
 
     通常，MCLK 应该同时是 ``采样率`` 和 BCLK 的倍数。字段 :cpp:member:`i2s_std_clk_config_t::mclk_multiple` 表示 MCLK 相对于 ``采样率`` 的倍数。在大多数情况下，将其设置为 ``I2S_MCLK_MULTIPLE_256`` 即可。但如果 ``slot_bit_width`` 被设置为 ``I2S_SLOT_BIT_WIDTH_24BIT``，为了保证 MCLK 是 BCLK 的整数倍，应该将 :cpp:member:`i2s_std_clk_config_t::mclk_multiple` 设置为能被 3 整除的倍数，如 ``I2S_MCLK_MULTIPLE_384``，否则 WS 会不精准。
 
+.. only:: esp32
+
+    .. note::
+
+        在ESP32上，MCLK 管脚必须使用 GPIO0、GPIO1 或 GPIO3 管脚。其他的时钟管脚可以使用任意的 GPIO。注意，由于 GPIO0 为 Strapping 管脚，一般不推荐用作其他功能。
+
 .. _i2s-communication-mode:
 
 I2S 通信模式