diff --git a/components/hal/esp32p4/include/hal/dma2d_ll.h b/components/hal/esp32p4/include/hal/dma2d_ll.h
index de79e367a10..563ade6167a 100644
--- a/components/hal/esp32p4/include/hal/dma2d_ll.h
+++ b/components/hal/esp32p4/include/hal/dma2d_ll.h
@@ -1019,7 +1019,7 @@ static inline void dma2d_ll_tx_configure_color_space_conv(dma2d_dev_t *dev, uint
         input_sel = 7;
         break;
     case DMA2D_CSC_TX_SCRAMBLE:
-        input_sel = 2; // Or 3
+        input_sel = 3; // only 3 bytes/pixel format is supported for scrambling
         proc_en = false;
         output_sel = 2;
         break;
diff --git a/components/hal/include/hal/dma2d_types.h b/components/hal/include/hal/dma2d_types.h
index b66c791deb4..44f1395c230 100644
--- a/components/hal/include/hal/dma2d_types.h
+++ b/components/hal/include/hal/dma2d_types.h
@@ -147,6 +147,7 @@ typedef enum {
  * @brief Enumeration of 2D-DMA pixel bytes scamble order in color space conversion
  *
  * Assuming the original pixel byte order (from MSB to LSB) is 2-1-0 .
+ * This scramble only fits 3 bytes/pixel format. For non-3 bytes/pixel format, the pixels will be messed up if scrambling is used.
  */
 typedef enum {
     DMA2D_SCRAMBLE_ORDER_BYTE2_1_0,     /*!< 2D-DMA pixel data scrambled as BYTE2-1-0 (no scramble) */