feat(rgb_lcd): support draw bitmap hook

components/esp_lcd/dsi/esp_lcd_panel_dpi.c

@@ -528,7 +528,7 @@ esp_err_t esp_lcd_dpi_panel_enable_dma2d(esp_lcd_panel_handle_t panel)
     esp_lcd_panel_hooks_t hooks = {
         .draw_bitmap_hook = dpi_panel_draw_bitmap_dma2d_hook,
     };
-    ESP_GOTO_ON_ERROR(esp_lcd_dpi_panel_register_hooks(panel, &hooks, dpi_panel->user_ctx), err, TAG, "register DMA2D draw bitmap hook failed");
+    ESP_GOTO_ON_ERROR(esp_lcd_dpi_panel_register_hooks(panel, &hooks, NULL), err, TAG, "register DMA2D draw bitmap hook failed");
 
     return ESP_OK;
 
@@ -549,14 +549,19 @@ esp_err_t esp_lcd_dpi_panel_disable_dma2d(esp_lcd_panel_handle_t panel)
     // Check if built-in DMA2D draw bitmap hook is registered
     ESP_RETURN_ON_FALSE(dpi_panel->fbcpy_handle, ESP_ERR_INVALID_STATE, TAG, "draw bitmap DMA2D hook not registered");
 
+    // Clear the hook first so new draws stop entering the DMA2D path before uninstall.
     esp_lcd_panel_hooks_t hooks = {
         .draw_bitmap_hook = NULL,
     };
     ESP_RETURN_ON_ERROR(esp_lcd_dpi_panel_register_hooks(panel, &hooks, NULL), TAG, "unregister DMA2D draw bitmap hook failed");
-    if (dpi_panel->fbcpy_handle) {
-        ESP_RETURN_ON_ERROR(esp_async_color_convert_uninstall(dpi_panel->fbcpy_handle), TAG, "uninstall DMA2D failed");
-        dpi_panel->fbcpy_handle = NULL;
+    esp_err_t ret = esp_async_color_convert_uninstall(dpi_panel->fbcpy_handle);
+    if (ret != ESP_OK) {
+        // Restore the hook so draw_bitmap_hook and fbcpy_handle stay consistent on failure
+        hooks.draw_bitmap_hook = dpi_panel_draw_bitmap_dma2d_hook;
+        esp_lcd_dpi_panel_register_hooks(panel, &hooks, NULL);
+        ESP_RETURN_ON_ERROR(ret, TAG, "uninstall DMA2D failed");
     }
+    dpi_panel->fbcpy_handle = NULL;
     dpi_panel->on_hook_end = NULL;
 
     return ESP_OK;
@@ -586,14 +591,35 @@ static esp_err_t dpi_panel_draw_bitmap_2d(esp_lcd_panel_t *panel, int x_start, i
     size_t fb_size = dpi_panel->fb_size;
     size_t bits_per_pixel = dpi_panel->bits_per_pixel;
 
-    // clip to boundaries
     int h_res = dpi_panel->h_pixels;
     int v_res = dpi_panel->v_pixels;
+
+    // save the original coordinates before clipping
+    int unclipped_x_start = x_start;
+    int unclipped_y_start = y_start;
+    int unclipped_x_end = x_end;
+    int unclipped_y_end = y_end;
+
+    // clip to boundaries
     x_start = MAX(x_start, 0);
     x_end = MIN(x_end, h_res);
     y_start = MAX(y_start, 0);
     y_end = MIN(y_end, v_res);
 
+    // adjust the source coordinates to the clipped region
+    src_x_start += x_start - unclipped_x_start;
+    src_y_start += y_start - unclipped_y_start;
+    src_x_end -= unclipped_x_end - x_end;
+    src_y_end -= unclipped_y_end - y_end;
+
+    if (x_start >= x_end || y_start >= y_end || src_x_start >= src_x_end || src_y_start >= src_y_end) {
+        // no valid region to draw, skip
+        if (dpi_panel->on_color_trans_done) {
+            dpi_panel->on_color_trans_done(&dpi_panel->base, NULL, dpi_panel->user_ctx);
+        }
+        return ESP_OK;
+    }
+
     bool do_copy = false;
     uint8_t draw_buf_fb_index = 0;
     // check if the user draw buffer resides in any frame buffer's memory range

components/esp_lcd/dsi/include/esp_lcd_mipi_dsi.h

@@ -221,52 +221,6 @@ typedef struct {
  */
 esp_err_t esp_lcd_dpi_panel_register_event_callbacks(esp_lcd_panel_handle_t dpi_panel, const esp_lcd_dpi_panel_event_callbacks_t *cbs, void *user_ctx);
 
-/**
- * @brief Type of draw bitmap hook data
- */
-typedef struct {
-    void *dst_data;       /*!< Destination buffer (usually frame buffer) */
-    int dst_x_size;       /*!< Destination bitmap width */
-    int dst_y_size;       /*!< Destination bitmap height */
-    int dst_x_start;      /*!< Destination start x coordinate */
-    int dst_y_start;      /*!< Destination start y coordinate */
-    int dst_x_end;        /*!< Destination end x coordinate (exclusive) */
-    int dst_y_end;        /*!< Destination end y coordinate (exclusive) */
-    const void *src_data; /*!< Source bitmap data */
-    int src_x_size;       /*!< Source bitmap width */
-    int src_y_size;       /*!< Source bitmap height */
-    int src_x_start;      /*!< Source start x coordinate */
-    int src_y_start;      /*!< Source start y coordinate */
-    int src_x_end;        /*!< Source end x coordinate (exclusive) */
-    int src_y_end;        /*!< Source end y coordinate (exclusive) */
-    int bits_per_pixel;   /*!< Bits per pixel */
-    bool (*on_hook_end)(esp_lcd_panel_handle_t panel); /*!< Callback to be invoked when the hook completes its operation */
-} esp_lcd_draw_bitmap_hook_data_t;
-
-/**
- * @brief draw bitmap hook function type for custom pixel processing operations
- *
- * This hook allows users to implement custom operations like scaling, rotation,
- * color space conversion, etc. using hardware accelerators like PPA or DMA2D.
- *
- * @note The hook should ensure the synchronization of draw operations on its own.
- *
- * @param[in] panel LCD panel handle
- * @param[in] hook_data Hook data
- * @param[in] hook_ctx Hook context
- * @return
- *          - ESP_OK on success
- *          - Other error codes on failure
- */
-typedef esp_err_t (*esp_lcd_panel_draw_bitmap_hook_t)(esp_lcd_panel_handle_t panel, const esp_lcd_draw_bitmap_hook_data_t *hook_data, void* hook_ctx);
-
-/**
- * @brief Type of LCD panel hooks
- */
-typedef struct {
-    esp_lcd_panel_draw_bitmap_hook_t draw_bitmap_hook; /*!< Draw bitmap hook function */
-} esp_lcd_panel_hooks_t;
-
 /**
  * @brief Register panel hooks to the DPI panel
  *
@@ -286,7 +240,7 @@ esp_err_t esp_lcd_dpi_panel_register_hooks(esp_lcd_panel_handle_t dpi_panel, con
 /**
  * @brief Enable DMA2D for DPI panel
  *
- * @note The function will register a built-in DMA2D draw bitmap hook to perform draw bitmap operations using DMA2D.
+ * @note The function will register a built-in DMA2D draw bitmap hook to perform bitmap copy using DMA2D.
  *
  * @param[in] dpi_panel LCD DPI panel handle, which is returned from esp_lcd_new_panel_dpi()
  * @return

components/esp_lcd/include/esp_lcd_types.h

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2021-2025 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2021-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -7,6 +7,7 @@
 
 #include <stdbool.h>
 #include "esp_assert.h"
+#include "esp_err.h"
 #include "hal/lcd_types.h"
 #include "hal/gpio_types.h"
 #include "hal/color_types.h"
@@ -72,6 +73,58 @@ typedef struct {
     lcd_yuv_conv_std_t conv_std;       /*!< YUV conversion standard: BT601, BT709 */
 } esp_lcd_color_conv_yuv_config_t;
 
+/**
+ * @brief Type of draw bitmap hook data
+ */
+typedef struct {
+    void *dst_data;       /*!< Destination buffer (usually frame buffer) */
+    int dst_x_size;       /*!< Destination bitmap width */
+    int dst_y_size;       /*!< Destination bitmap height */
+    int dst_x_start;      /*!< Destination start x coordinate */
+    int dst_y_start;      /*!< Destination start y coordinate */
+    int dst_x_end;        /*!< Destination end x coordinate (exclusive) */
+    int dst_y_end;        /*!< Destination end y coordinate (exclusive) */
+    const void *src_data; /*!< Source bitmap data */
+    int src_x_size;       /*!< Source bitmap width */
+    int src_y_size;       /*!< Source bitmap height */
+    int src_x_start;      /*!< Source start x coordinate */
+    int src_y_start;      /*!< Source start y coordinate */
+    int src_x_end;        /*!< Source end x coordinate (exclusive) */
+    int src_y_end;        /*!< Source end y coordinate (exclusive) */
+    int bits_per_pixel;   /*!< Bits per pixel */
+    bool (*on_hook_end)(esp_lcd_panel_handle_t panel); /*!< Callback to be invoked by an asynchronous hook after the custom draw
+                                                            operation completes. This notifies the panel driver to finish the draw
+                                                            transaction. If a color transfer done callback has been registered, it
+                                                            also invokes that callback */
+} esp_lcd_draw_bitmap_hook_data_t;
+
+/**
+ * @brief draw bitmap hook function type for custom pixel processing operations
+ *
+ * This hook allows users to implement custom operations like scaling, rotation,
+ * color space conversion, etc. using hardware accelerators like PPA or DMA2D.
+ *
+ * @note For asynchronous operations, the hook should call hook_data->on_hook_end() after the operation is complete.
+ *       The panel driver does not wait for a previous draw to finish; the hook must handle synchronization itself.
+ *       The simplest approach is to serialize draws. To queue multiple transactions (e.g. via PPA), keep per-transaction
+ *       hook_data, keep source buffers valid until completion, and handle overlapping destinations carefully.
+ *
+ * @param[in] panel LCD panel handle
+ * @param[in] hook_data Hook data
+ * @param[in] hook_ctx Hook context
+ * @return
+ *          - ESP_OK on success
+ *          - Other error codes on failure
+ */
+typedef esp_err_t (*esp_lcd_panel_draw_bitmap_hook_t)(esp_lcd_panel_handle_t panel, const esp_lcd_draw_bitmap_hook_data_t *hook_data, void* hook_ctx);
+
+/**
+ * @brief Type of LCD panel hooks
+ */
+typedef struct {
+    esp_lcd_panel_draw_bitmap_hook_t draw_bitmap_hook; /*!< Draw bitmap hook function */
+} esp_lcd_panel_hooks_t;
+
 #ifdef __cplusplus
 }
 #endif

components/esp_lcd/linker.lf

@@ -4,6 +4,15 @@ entries:
     if LCD_DSI_ISR_HANDLER_IN_IRAM = y:
         esp_lcd_panel_dpi: mipi_dsi_dma_trans_done_cb (noflash)
         esp_lcd_panel_dpi: mipi_dsi_bridge_isr_handler (noflash)
+        esp_lcd_panel_dpi: dpi_panel_draw_bitmap_hook_end (noflash)
+        if SOC_DMA2D_SUPPORTED = y:
+            esp_lcd_panel_dpi: async_fbcpy_done_cb (noflash)
+
+[mapping:esp_lcd_async_color_convert]
+archive: libesp_driver_dma.a
+entries:
+    if (LCD_DSI_ISR_HANDLER_IN_IRAM = y || LCD_RGB_ISR_IRAM_SAFE = y) && SOC_DMA2D_SUPPORTED = y:
+        async_color_convert_dma2d: async_color_convert_done_cb (noflash)
 
 [mapping:esp_lcd_dsi_dma]
 archive: libesp_driver_dma.a
@@ -21,7 +30,26 @@ entries:
     if LCD_RGB_ISR_IRAM_SAFE = y:
         gdma: gdma_reset (noflash)
         gdma: gdma_start (noflash)
+        gdma: gdma_request_link_switch_event (noflash)
         gdma_link: gdma_link_get_head_addr (noflash)
+        gdma_link: gdma_link_concat (noflash)
+
+[mapping:esp_lcd_rgb_dma_hal]
+archive: libesp_hal_dma.a
+entries:
+    if LCD_RGB_ISR_IRAM_SAFE = y:
+        gdma_hal_top: gdma_hal_request_link_switch_event (noflash)
+        if SOC_AXI_GDMA_SUPPORTED = y:
+            gdma_hal_axi: gdma_axi_hal_request_link_switch_event (noflash)
+
+[mapping:esp_lcd_rgb]
+archive: libesp_lcd.a
+entries:
+    if LCD_RGB_ISR_IRAM_SAFE = y:
+        esp_lcd_panel_rgb: rgb_panel_update_dma_link (noflash)
+        esp_lcd_panel_rgb: rgb_panel_draw_bitmap_hook_end (noflash)
+        if SOC_DMA2D_SUPPORTED = y:
+            esp_lcd_panel_rgb: async_fbcpy_done_cb (noflash)
 
 [mapping:esp_lcd_rgb_hal_common]
 archive: libhal.a

components/esp_lcd/rgb/esp_lcd_panel_rgb.c

@@ -49,6 +49,7 @@
 #include "hal/color_hal.h"
 #include "rgb_lcd_rotation_sw.h"
 #include "esp_private/sleep_retention.h"
+#include "esp_async_color_convert.h"
 
 #if SOC_HAS(AXI_GDMA)
 #include "hal/axi_dma_ll.h"
@@ -90,6 +91,8 @@ static esp_err_t rgb_panel_del(esp_lcd_panel_t *panel);
 static esp_err_t rgb_panel_reset(esp_lcd_panel_t *panel);
 static esp_err_t rgb_panel_init(esp_lcd_panel_t *panel);
 static esp_err_t rgb_panel_draw_bitmap(esp_lcd_panel_t *panel, int x_start, int y_start, int x_end, int y_end, const void *color_data);
+static esp_err_t rgb_panel_draw_bitmap_2d(esp_lcd_panel_t *panel, int x_start, int y_start, int x_end, int y_end, const void *color_data,
+                                          size_t src_x_size, size_t src_y_size, int src_x_start, int src_y_start, int src_x_end, int src_y_end);
 static esp_err_t rgb_panel_invert_color(esp_lcd_panel_t *panel, bool invert_color_data);
 static esp_err_t rgb_panel_mirror(esp_lcd_panel_t *panel, bool mirror_x, bool mirror_y);
 static esp_err_t rgb_panel_swap_xy(esp_lcd_panel_t *panel, bool swap_axes);
@@ -167,6 +170,11 @@ struct esp_rgb_panel_t {
         uint32_t bb_behind_cache: 1;     // Whether the bounce buffer is behind the cache
         uint32_t user_fb: 1;             // Whether the frame buffer is provided by user
     } flags;
+    // hook fields
+    esp_lcd_panel_draw_bitmap_hook_t draw_bitmap_hook; // Draw bitmap hook function
+    void* hook_ctx; // Hook context
+    bool (*on_hook_end)(esp_lcd_panel_handle_t panel); // Callback to be invoked when the draw bitmap hook completes its operation
+    async_color_convert_handle_t fbcpy_handle; // Async color convert handle used for same-format DMA2D frame buffer copy
 };
 
 static esp_err_t lcd_rgb_panel_alloc_frame_buffers(esp_rgb_panel_t *rgb_panel, const esp_lcd_rgb_panel_config_t *panel_config)
@@ -446,6 +454,7 @@ esp_err_t esp_lcd_new_rgb_panel(const esp_lcd_rgb_panel_config_t *rgb_panel_conf
     rgb_panel->base.reset = rgb_panel_reset;
     rgb_panel->base.init = rgb_panel_init;
     rgb_panel->base.draw_bitmap = rgb_panel_draw_bitmap;
+    rgb_panel->base.draw_bitmap_2d = rgb_panel_draw_bitmap_2d;
     rgb_panel->base.disp_on_off = rgb_panel_disp_on_off;
     rgb_panel->base.invert_color = rgb_panel_invert_color;
     rgb_panel->base.mirror = rgb_panel_mirror;
@@ -589,6 +598,10 @@ static esp_err_t rgb_panel_del(esp_lcd_panel_t *panel)
 {
     esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
     int panel_id = rgb_panel->panel_id;
+    // check if the panel is using DMA2D draw bitmap hook
+    if (rgb_panel->fbcpy_handle) {
+        ESP_RETURN_ON_FALSE(false, ESP_ERR_INVALID_STATE, TAG, "please call `esp_lcd_rgb_panel_disable_dma2d()` before deleting the panel");
+    }
     ESP_RETURN_ON_ERROR(lcd_rgb_panel_destroy(rgb_panel), TAG, "destroy rgb panel(%d) failed", panel_id);
     ESP_LOGD(TAG, "del rgb panel(%d)", panel_id);
     return ESP_OK;
@@ -658,17 +671,73 @@ static esp_err_t rgb_panel_init(esp_lcd_panel_t *panel)
 }
 
 static esp_err_t rgb_panel_draw_bitmap(esp_lcd_panel_t *panel, int x_start, int y_start, int x_end, int y_end, const void *color_data)
+{
+    size_t src_x_size = x_end - x_start;
+    size_t src_y_size = y_end - y_start;
+    size_t src_x_start = 0;
+    size_t src_y_start = 0;
+    size_t src_x_end = src_x_size;
+    size_t src_y_end = src_y_size;
+    ESP_RETURN_ON_ERROR(rgb_panel_draw_bitmap_2d(panel, x_start, y_start, x_end, y_end, color_data, src_x_size, src_y_size, src_x_start, src_y_start, src_x_end, src_y_end),
+                        TAG, "draw bitmap failed");
+    return ESP_OK;
+}
+
+static void rgb_panel_update_dma_link(esp_rgb_panel_t *rgb_panel)
+{
+    if (!rgb_panel->bb_size && rgb_panel->flags.stream_mode) {
+        for (int i = 0; i < rgb_panel->num_fbs; i++) {
+            // Note, because of DMA prefetch, there's possibility that the old frame buffer might be sent out again
+            // it's hard to know the time when the new frame buffer starts
+            gdma_link_concat(rgb_panel->dma_fb_links[i], -1, rgb_panel->dma_fb_links[rgb_panel->cur_fb_index], 0);
+        }
+#if RGB_LCD_USE_GDMA_LINK_SWITCH_EVENT
+        gdma_request_link_switch_event(rgb_panel->dma_chan);
+#endif // RGB_LCD_USE_GDMA_LINK_SWITCH_EVENT
+    }
+}
+
+static bool rgb_panel_draw_bitmap_hook_end(esp_lcd_panel_t *panel)
+{
+    esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
+    rgb_panel_update_dma_link(rgb_panel);
+    if (rgb_panel->on_color_trans_done) {
+        return rgb_panel->on_color_trans_done(panel, NULL, rgb_panel->user_ctx);
+    }
+    return false;
+}
+
+#if SOC_HAS(DMA2D)
+static bool async_fbcpy_done_cb(async_color_convert_handle_t conv_hdl, async_color_convert_event_data_t *event, void *cb_args)
+{
+    bool need_yield = false;
+    esp_rgb_panel_t *rgb_panel = (esp_rgb_panel_t *)cb_args;
+    (void)conv_hdl;
+    (void)event;
+
+    if (rgb_panel->on_hook_end) {
+        if (rgb_panel->on_hook_end(&rgb_panel->base)) {
+            need_yield = true;
+        }
+    }
+    return need_yield;
+}
+#endif // SOC_HAS(DMA2D)
+
+static esp_err_t rgb_panel_draw_bitmap_2d(esp_lcd_panel_t *panel, int x_start, int y_start, int x_end, int y_end, const void *color_data,
+                                          size_t src_x_size, size_t src_y_size, int src_x_start, int src_y_start, int src_x_end, int src_y_end)
 {
     esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
     ESP_RETURN_ON_FALSE(rgb_panel->num_fbs > 0, ESP_ERR_NOT_SUPPORTED, TAG, "no frame buffer installed");
     esp_lcd_rgb_panel_draw_buf_complete_cb_t cb = rgb_panel->on_color_trans_done;
 
+    uint8_t cur_fb_index = rgb_panel->cur_fb_index;
+    uint8_t *frame_buffer = rgb_panel->fbs[cur_fb_index];
     uint8_t *draw_buffer = (uint8_t *)color_data;
     size_t fb_size = rgb_panel->fb_size;
     int h_res = rgb_panel->timings.h_res;
     int v_res = rgb_panel->timings.v_res;
     int bytes_per_pixel = rgb_panel->fb_bits_per_pixel / 8;
-    uint32_t bytes_per_line = bytes_per_pixel * h_res;
 
     // adjust the flush window by adding extra gap
     x_start += rgb_panel->x_gap;
@@ -676,6 +745,12 @@ static esp_err_t rgb_panel_draw_bitmap(esp_lcd_panel_t *panel, int x_start, int
     x_end += rgb_panel->x_gap;
     y_end += rgb_panel->y_gap;
 
+    // save the original coordinates before clipping
+    int unclipped_x_start = x_start;
+    int unclipped_y_start = y_start;
+    int unclipped_x_end = x_end;
+    int unclipped_y_end = y_end;
+
     // clip to boundaries
     if (rgb_panel->rotate_mask & ROTATE_MASK_SWAP_XY) {
         x_start = MAX(x_start, 0);
@@ -696,6 +771,20 @@ static esp_err_t rgb_panel_draw_bitmap(esp_lcd_panel_t *panel, int x_start, int
         return ESP_OK;
     }
 
+    // adjust the source coordinates to the clipped region
+    src_x_start += x_start - unclipped_x_start;
+    src_y_start += y_start - unclipped_y_start;
+    src_x_end -= unclipped_x_end - x_end;
+    src_y_end -= unclipped_y_end - y_end;
+
+    if (x_start >= x_end || y_start >= y_end || src_x_start >= src_x_end || src_y_start >= src_y_end) {
+        // no valid region to draw, skip
+        if (cb) {
+            cb(&rgb_panel->base, NULL, rgb_panel->user_ctx);
+        }
+        return ESP_OK;
+    }
+
     // check if we want to copy the draw buffer to the internal frame buffer
     bool draw_buf_copy_to_fb = true;
     uint8_t draw_buf_fb_index = 0;
@@ -707,17 +796,44 @@ static esp_err_t rgb_panel_draw_bitmap(esp_lcd_panel_t *panel, int x_start, int
         }
     }
 
-    if (draw_buf_copy_to_fb) {
+    if (rgb_panel->draw_bitmap_hook && draw_buf_copy_to_fb && !rgb_panel->rotate_mask) { // copy using draw bitmap hook
+        ESP_LOGV(TAG, "copy draw buffer by draw bitmap hook");
+        // Note, whether the previous draw operation is finished should be ensured by the hook.
+        // For the built-in DMA2D hook, cache maintenance of the source and destination
+        // buffers is handled inside the async color convert driver.
+
+        esp_lcd_draw_bitmap_hook_data_t hook_data = {
+            .dst_data = frame_buffer,
+            .dst_x_size = h_res,
+            .dst_y_size = v_res,
+            .dst_x_start = x_start,
+            .dst_y_start = y_start,
+            .dst_x_end = x_end,
+            .dst_y_end = y_end,
+            .src_data = draw_buffer,
+            .src_x_size = src_x_size,
+            .src_y_size = src_y_size,
+            .src_x_start = src_x_start,
+            .src_y_start = src_y_start,
+            .src_x_end = src_x_end,
+            .src_y_end = src_y_end,
+            .bits_per_pixel = rgb_panel->fb_bits_per_pixel,
+            .on_hook_end = rgb_panel_draw_bitmap_hook_end,
+        };
+
+        ESP_RETURN_ON_ERROR(rgb_panel->draw_bitmap_hook(panel, &hook_data, rgb_panel->hook_ctx), TAG, "draw_bitmap_hook failed");
+        return ESP_OK;
+    } else if (draw_buf_copy_to_fb) { // copy by CPU
         // sync the draw buffer with the frame buffer by CPU copy
         ESP_LOGV(TAG, "copy draw buffer to frame buffer by CPU");
-        uint8_t *fb = rgb_panel->fbs[rgb_panel->cur_fb_index];
-        size_t bytes_to_flush = v_res * bytes_per_line;
-        uint8_t *flush_ptr = fb;
-
-        const uint8_t *from = (const uint8_t *)color_data;
+        uint8_t *fb = frame_buffer;
+        const uint8_t *from_base = draw_buffer;
         uint32_t copy_bytes_per_line = (x_end - x_start) * bytes_per_pixel;
-        size_t offset = y_start * copy_bytes_per_line + x_start * bytes_per_pixel;
-        uint8_t *to = fb;
+        uint32_t bytes_per_line = bytes_per_pixel * h_res;
+        uint32_t src_bytes_per_line = bytes_per_pixel * src_x_size;
+        size_t bytes_to_flush = 0;
+        uint8_t *flush_ptr = NULL;
+
         if (1 == bytes_per_pixel) {
             COPY_PIXEL_CODE_BLOCK(8)
         } else if (2 == bytes_per_pixel) {
@@ -726,22 +842,21 @@ static esp_err_t rgb_panel_draw_bitmap(esp_lcd_panel_t *panel, int x_start, int
             COPY_PIXEL_CODE_BLOCK(24)
         }
         // do memory sync only when the frame buffer is mounted to the DMA link list and behind the cache
-        if (!rgb_panel->bb_size && rgb_panel->flags.fb_behind_cache) {
+        if (!rgb_panel->bb_size && rgb_panel->flags.fb_behind_cache && flush_ptr) {
             esp_cache_msync(flush_ptr, bytes_to_flush, ESP_CACHE_MSYNC_FLAG_DIR_C2M | ESP_CACHE_MSYNC_FLAG_UNALIGNED);
         }
         // after the draw buffer finished copying, notify the user to recycle the draw buffer
         if (cb) {
             cb(&rgb_panel->base, NULL, rgb_panel->user_ctx);
         }
-    } else {
-        ESP_LOGV(TAG, "draw buffer is part of the frame buffer");
-        // the new frame buffer index is changed
+    } else { // no copy, just do cache memory write back
+        ESP_LOGV(TAG, "draw buffer is in frame buffer memory range, do cache write back only");
+        // only write back the LCD lines that updated by the draw buffer
         rgb_panel->cur_fb_index = draw_buf_fb_index;
-        // when this function is called, the frame buffer already reflects the draw buffer changes
-        // if the frame buffer is also mounted to the DMA, we need to do the sync between them
-        if (!rgb_panel->bb_size && rgb_panel->flags.fb_behind_cache) {
-            uint8_t *cache_sync_start = rgb_panel->fbs[draw_buf_fb_index] + (y_start * h_res) * bytes_per_pixel;
-            size_t cache_sync_size = (y_end - y_start) * bytes_per_line;
+        uint8_t *cache_sync_start = rgb_panel->fbs[draw_buf_fb_index] + (y_start * h_res) * bytes_per_pixel;
+        size_t cache_sync_size = (y_end - y_start) * h_res * bytes_per_pixel;
+        // the buffer to be flushed is still within the frame buffer, so even an unaligned address is OK
+        if (rgb_panel->flags.fb_behind_cache) {
             esp_cache_msync(cache_sync_start, cache_sync_size, ESP_CACHE_MSYNC_FLAG_DIR_C2M | ESP_CACHE_MSYNC_FLAG_UNALIGNED);
         }
         // after the draw buffer finished copying, notify the user to recycle the draw buffer
@@ -750,18 +865,7 @@ static esp_err_t rgb_panel_draw_bitmap(esp_lcd_panel_t *panel, int x_start, int
         }
     }
 
-    if (!rgb_panel->bb_size) {
-        if (rgb_panel->flags.stream_mode) {
-            for (int i = 0; i < rgb_panel->num_fbs; i++) {
-                // Note, because of DMA prefetch, there's possibility that the old frame buffer might be sent out again
-                // it's hard to know the time when the new frame buffer starts
-                gdma_link_concat(rgb_panel->dma_fb_links[i], -1, rgb_panel->dma_fb_links[rgb_panel->cur_fb_index], 0);
-            }
-#if RGB_LCD_USE_GDMA_LINK_SWITCH_EVENT
-            ESP_RETURN_ON_ERROR(gdma_request_link_switch_event(rgb_panel->dma_chan), TAG, "request link switch event failed");
-#endif // RGB_LCD_USE_GDMA_LINK_SWITCH_EVENT
-        }
-    }
+    rgb_panel_update_dma_link(rgb_panel);
     return ESP_OK;
 }
 
@@ -1325,6 +1429,108 @@ IRAM_ATTR static void rgb_lcd_default_isr_handler(void *args)
     }
 }
 
+esp_err_t esp_lcd_rgb_panel_register_hooks(esp_lcd_panel_handle_t panel, const esp_lcd_panel_hooks_t *hooks, void *hook_ctx)
+{
+    ESP_RETURN_ON_FALSE(panel && hooks, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
+    esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
+
+    rgb_panel->draw_bitmap_hook = hooks->draw_bitmap_hook;
+    rgb_panel->hook_ctx = hook_ctx;
+
+    return ESP_OK;
+}
+
+#if SOC_HAS(DMA2D)
+static esp_err_t rgb_panel_draw_bitmap_dma2d_hook(esp_lcd_panel_t *panel, const esp_lcd_draw_bitmap_hook_data_t *hook_data, void* hook_ctx)
+{
+    ESP_LOGV(TAG, "copy draw buffer by DMA2D");
+    esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
+    (void)hook_ctx;
+
+    async_color_convert_request_t fbcpy_trans_config = {
+        .src_buffer = hook_data->src_data,
+        .dst_buffer = hook_data->dst_data,
+        .src_stride = hook_data->src_x_size,
+        .src_height = hook_data->src_y_size,
+        .dst_stride = hook_data->dst_x_size,
+        .dst_height = hook_data->dst_y_size,
+        .src_x = hook_data->src_x_start,
+        .src_y = hook_data->src_y_start,
+        .dst_x = hook_data->dst_x_start,
+        .dst_y = hook_data->dst_y_start,
+        .copy_width = hook_data->src_x_end - hook_data->src_x_start,
+        .copy_height = hook_data->src_y_end - hook_data->src_y_start,
+        // For this DMA2D hook we only do window copy from draw buffer to frame buffer.
+        // Source and destination color formats are intentionally set to the same value to disable CSC.
+        .src_color_format = rgb_panel->in_color_format,
+        .dst_color_format = rgb_panel->in_color_format,
+    };
+    // The async color convert backend owns source/destination cache sync for the
+    // DMA2D copy path, so the LCD driver should not perform extra cache sync here.
+    // Save the completion callback and invoke it when the async frame buffer copy finishes.
+    rgb_panel->on_hook_end = hook_data->on_hook_end;
+    ESP_RETURN_ON_ERROR(esp_async_color_convert(rgb_panel->fbcpy_handle, &fbcpy_trans_config, async_fbcpy_done_cb, rgb_panel), TAG, "async frame buffer copy failed");
+    return ESP_OK;
+}
+
+esp_err_t esp_lcd_rgb_panel_enable_dma2d(esp_lcd_panel_handle_t panel)
+{
+    ESP_RETURN_ON_FALSE(panel, ESP_ERR_INVALID_ARG, TAG, "invalid panel");
+    esp_err_t ret = ESP_OK;
+    esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
+
+    // Check if built-in DMA2D draw bitmap hook is registered
+    ESP_RETURN_ON_FALSE(!rgb_panel->fbcpy_handle, ESP_ERR_INVALID_STATE, TAG, "draw bitmap DMA2D hook is already registered");
+
+    // Initialize the async color convert backend used by the built-in DMA2D copy hook.
+    // Use its default backlog to queue multiple frame buffer copy requests.
+    async_color_convert_config_t fbcpy_config = {};
+    ESP_RETURN_ON_ERROR(esp_async_color_convert_install_dma2d(&fbcpy_config, &rgb_panel->fbcpy_handle), TAG, "install async frame buffer copy backend failed");
+
+    // Register the DMA2D draw bitmap hook
+    esp_lcd_panel_hooks_t hooks = {
+        .draw_bitmap_hook = rgb_panel_draw_bitmap_dma2d_hook,
+    };
+    ESP_GOTO_ON_ERROR(esp_lcd_rgb_panel_register_hooks(panel, &hooks, NULL), err, TAG, "register DMA2D draw bitmap hook failed");
+
+    return ESP_OK;
+
+err:
+    if (rgb_panel->fbcpy_handle) {
+        esp_async_color_convert_uninstall(rgb_panel->fbcpy_handle);
+        rgb_panel->fbcpy_handle = NULL;
+    }
+    rgb_panel->on_hook_end = NULL;
+    return ret;
+}
+
+esp_err_t esp_lcd_rgb_panel_disable_dma2d(esp_lcd_panel_handle_t panel)
+{
+    ESP_RETURN_ON_FALSE(panel, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
+    esp_rgb_panel_t *rgb_panel = __containerof(panel, esp_rgb_panel_t, base);
+
+    // Check if built-in DMA2D draw bitmap hook is registered
+    ESP_RETURN_ON_FALSE(rgb_panel->fbcpy_handle, ESP_ERR_INVALID_STATE, TAG, "draw bitmap DMA2D hook not registered");
+
+    // Clear the hook first so new draws stop entering the DMA2D path before uninstall.
+    esp_lcd_panel_hooks_t hooks = {
+        .draw_bitmap_hook = NULL,
+    };
+    ESP_RETURN_ON_ERROR(esp_lcd_rgb_panel_register_hooks(panel, &hooks, NULL), TAG, "unregister DMA2D draw bitmap hook failed");
+    esp_err_t ret = esp_async_color_convert_uninstall(rgb_panel->fbcpy_handle);
+    if (ret != ESP_OK) {
+        // Restore the hook so draw_bitmap_hook and fbcpy_handle stay consistent on failure
+        hooks.draw_bitmap_hook = rgb_panel_draw_bitmap_dma2d_hook;
+        esp_lcd_rgb_panel_register_hooks(panel, &hooks, NULL);
+        ESP_RETURN_ON_ERROR(ret, TAG, "uninstall DMA2D failed");
+    }
+    rgb_panel->fbcpy_handle = NULL;
+    rgb_panel->on_hook_end = NULL;
+
+    return ESP_OK;
+}
+#endif // SOC_HAS(DMA2D)
+
 #if CONFIG_LCD_ENABLE_DEBUG_LOG
 __attribute__((constructor))
 static void rgb_lcd_override_default_log_level(void)

components/esp_lcd/rgb/include/esp_lcd_panel_rgb.h

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2021-2025 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2021-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -282,6 +282,52 @@ void *esp_lcd_rgb_alloc_draw_buffer(esp_lcd_panel_handle_t panel, size_t size, u
  */
 esp_err_t esp_lcd_rgb_panel_set_yuv_conversion(esp_lcd_panel_handle_t panel, const esp_lcd_color_conv_yuv_config_t *config);
 
+/**
+ * @brief Register panel hooks to the RGB panel
+ *
+ * @note You can register panel hooks to implement custom operations like scaling, rotation, color space conversion, etc.
+ *       with hardware accelerators like PPA or DMA2D.
+ *       The hook will be overridden when this function is called multiple times.
+ * @note If software rotation is enabled by mirror or swap_xy, the RGB panel driver bypasses the draw bitmap hook and
+ *       falls back to the CPU copy path to apply the rotation transform.
+ *
+ * @param[in] panel LCD RGB panel handle, which is returned from esp_lcd_new_rgb_panel()
+ * @param[in] hooks Panel hooks
+ * @param[in] hook_ctx Hook context
+ * @return
+ *      - ESP_OK: Register hooks successfully
+ *      - Other error codes on failure
+ */
+esp_err_t esp_lcd_rgb_panel_register_hooks(esp_lcd_panel_handle_t panel, const esp_lcd_panel_hooks_t *hooks, void *hook_ctx);
+
+#if SOC_DMA2D_SUPPORTED
+/**
+ * @brief Enable DMA2D for RGB panel
+ *
+ * @note The function will register a built-in DMA2D draw bitmap hook to perform bitmap copy using DMA2D.
+ * @note If software rotation is enabled by mirror or swap_xy, the RGB panel driver bypasses the built-in DMA2D hook and
+ *       falls back to the CPU copy path, because the built-in DMA2D hook does not apply rotation transforms.
+ *
+ * @param[in] panel LCD RGB panel handle, which is returned from esp_lcd_new_rgb_panel()
+ * @return
+ *      - ESP_OK: Enable DMA2D successfully
+ *      - Other error codes on failure
+ */
+esp_err_t esp_lcd_rgb_panel_enable_dma2d(esp_lcd_panel_handle_t panel);
+
+/**
+ * @brief Disable DMA2D for RGB panel
+ *
+ * @note The function will unregister the built-in DMA2D draw bitmap hook.
+ *
+ * @param[in] panel LCD RGB panel handle, which is returned from esp_lcd_new_rgb_panel()
+ * @return
+ *      - ESP_OK: Disable DMA2D successfully
+ *      - Other error codes on failure
+ */
+esp_err_t esp_lcd_rgb_panel_disable_dma2d(esp_lcd_panel_handle_t panel);
+#endif // SOC_DMA2D_SUPPORTED
+
 #endif // SOC_LCD_RGB_SUPPORTED
 
 #ifdef __cplusplus

components/esp_lcd/rgb/rgb_lcd_rotation_sw.h

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2023-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -44,71 +44,85 @@ static inline void copy_pixel_24bpp(uint8_t *to, const uint8_t *from)
     *to++ = *from++;
 }
 
+// Macro for draw_bitmap_2d that supports source image stride and offset
+// Requires: from_base (source buffer base), src_x_start, src_y_start, src_bytes_per_line
 #define COPY_PIXEL_CODE_BLOCK(_bpp)                                                               \
     switch (rgb_panel->rotate_mask)                                                               \
     {                                                                                             \
     case 0:                                                                                       \
     {                                                                                             \
         uint8_t *to = fb + (y_start * h_res + x_start) * bytes_per_pixel;                         \
+        const uint8_t *from = from_base + src_y_start * src_bytes_per_line + src_x_start * bytes_per_pixel; \
         for (int y = y_start; y < y_end; y++)                                                     \
         {                                                                                         \
             memcpy(to, from, copy_bytes_per_line);                                                \
             to += bytes_per_line;                                                                 \
-            from += copy_bytes_per_line;                                                          \
+            from += src_bytes_per_line;                                                            \
         }                                                                                         \
         bytes_to_flush = (y_end - y_start) * bytes_per_line;                                      \
         flush_ptr = fb + y_start * bytes_per_line;                                                \
     }                                                                                             \
     break;                                                                                        \
     case ROTATE_MASK_MIRROR_X:                                                                    \
-        for (int y = y_start; y < y_end; y++)                                                     \
         {                                                                                         \
-            uint32_t index = (y * h_res + (h_res - 1 - x_start)) * bytes_per_pixel;               \
-            for (size_t x = x_start; x < x_end; x++)                                              \
+            const uint8_t *from = from_base + src_y_start * src_bytes_per_line + src_x_start * bytes_per_pixel; \
+            for (int y = y_start; y < y_end; y++)                                                 \
             {                                                                                     \
-                copy_pixel_##_bpp##bpp(to + index, from);                                         \
-                index -= bytes_per_pixel;                                                         \
-                from += bytes_per_pixel;                                                          \
+                uint32_t index = (y * h_res + (h_res - 1 - x_start)) * bytes_per_pixel;          \
+                for (size_t x = x_start; x < x_end; x++)                                          \
+                {                                                                                 \
+                    copy_pixel_##_bpp##bpp(fb + index, from);                                     \
+                    index -= bytes_per_pixel;                                                      \
+                    from += bytes_per_pixel;                                                       \
+                }                                                                                 \
+                from += src_bytes_per_line - copy_bytes_per_line;                                  \
             }                                                                                     \
+            bytes_to_flush = (y_end - y_start) * bytes_per_line;                                   \
+            flush_ptr = fb + y_start * bytes_per_line;                                            \
         }                                                                                         \
-        bytes_to_flush = (y_end - y_start) * bytes_per_line;                                      \
-        flush_ptr = fb + y_start * bytes_per_line;                                                \
         break;                                                                                    \
     case ROTATE_MASK_MIRROR_Y:                                                                    \
     {                                                                                             \
         uint8_t *to = fb + ((v_res - 1 - y_start) * h_res + x_start) * bytes_per_pixel;           \
+        const uint8_t *from = from_base + src_y_start * src_bytes_per_line + src_x_start * bytes_per_pixel; \
         for (int y = y_start; y < y_end; y++)                                                     \
         {                                                                                         \
-            memcpy(to, from, copy_bytes_per_line);                                                \
+            memcpy(to, from, copy_bytes_per_line);                                                 \
             to -= bytes_per_line;                                                                 \
-            from += copy_bytes_per_line;                                                          \
+            from += src_bytes_per_line;                                                            \
         }                                                                                         \
         bytes_to_flush = (y_end - y_start) * bytes_per_line;                                      \
         flush_ptr = fb + (v_res - y_end) * bytes_per_line;                                        \
     }                                                                                             \
     break;                                                                                        \
     case ROTATE_MASK_MIRROR_X | ROTATE_MASK_MIRROR_Y:                                             \
-        for (int y = y_start; y < y_end; y++)                                                     \
         {                                                                                         \
-            uint32_t index = ((v_res - 1 - y) * h_res + (h_res - 1 - x_start)) * bytes_per_pixel; \
-            for (size_t x = x_start; x < x_end; x++)                                              \
+            const uint8_t *from = from_base + src_y_start * src_bytes_per_line + src_x_start * bytes_per_pixel; \
+            for (int y = y_start; y < y_end; y++)                                                 \
             {                                                                                     \
-                copy_pixel_##_bpp##bpp(to + index, from);                                         \
-                index -= bytes_per_pixel;                                                         \
-                from += bytes_per_pixel;                                                          \
+                uint32_t index = ((v_res - 1 - y) * h_res + (h_res - 1 - x_start)) * bytes_per_pixel; \
+                for (size_t x = x_start; x < x_end; x++)                                          \
+                {                                                                                 \
+                    copy_pixel_##_bpp##bpp(fb + index, from);                                     \
+                    index -= bytes_per_pixel;                                                      \
+                    from += bytes_per_pixel;                                                       \
+                }                                                                                 \
+                from += src_bytes_per_line - copy_bytes_per_line;                                  \
             }                                                                                     \
+            bytes_to_flush = (y_end - y_start) * bytes_per_line;                                   \
+            flush_ptr = fb + (v_res - y_end) * bytes_per_line;                                    \
         }                                                                                         \
-        bytes_to_flush = (y_end - y_start) * bytes_per_line;                                      \
-        flush_ptr = fb + (v_res - y_end) * bytes_per_line;                                        \
         break;                                                                                    \
     case ROTATE_MASK_SWAP_XY:                                                                     \
         for (int y = y_start; y < y_end; y++)                                                     \
         {                                                                                         \
             for (int x = x_start; x < x_end; x++)                                                 \
             {                                                                                     \
-                uint32_t j = y * copy_bytes_per_line + x * bytes_per_pixel - offset;              \
+                uint32_t src_y = src_y_start + (y - y_start);                                     \
+                uint32_t src_x = src_x_start + (x - x_start);                                     \
+                uint32_t src_j = src_y * src_bytes_per_line + src_x * bytes_per_pixel;             \
                 uint32_t i = (x * h_res + y) * bytes_per_pixel;                                   \
-                copy_pixel_##_bpp##bpp(to + i, from + j);                                         \
+                copy_pixel_##_bpp##bpp(fb + i, from_base + src_j);                                 \
             }                                                                                     \
         }                                                                                         \
         bytes_to_flush = (x_end - x_start) * bytes_per_line;                                      \
@@ -119,9 +133,11 @@ static inline void copy_pixel_24bpp(uint8_t *to, const uint8_t *from)
         {                                                                                         \
             for (int x = x_start; x < x_end; x++)                                                 \
             {                                                                                     \
-                uint32_t j = y * copy_bytes_per_line + x * bytes_per_pixel - offset;              \
-                uint32_t i = (x * h_res + h_res - 1 - y) * bytes_per_pixel;                       \
-                copy_pixel_##_bpp##bpp(to + i, from + j);                                         \
+                uint32_t src_y = src_y_start + (y - y_start);                                     \
+                uint32_t src_x = src_x_start + (x - x_start);                                     \
+                uint32_t src_j = src_y * src_bytes_per_line + src_x * bytes_per_pixel;             \
+                uint32_t i = (x * h_res + h_res - 1 - y) * bytes_per_pixel;                        \
+                copy_pixel_##_bpp##bpp(fb + i, from_base + src_j);                                \
             }                                                                                     \
         }                                                                                         \
         bytes_to_flush = (x_end - x_start) * bytes_per_line;                                      \
@@ -132,9 +148,11 @@ static inline void copy_pixel_24bpp(uint8_t *to, const uint8_t *from)
         {                                                                                         \
             for (int x = x_start; x < x_end; x++)                                                 \
             {                                                                                     \
-                uint32_t j = y * copy_bytes_per_line + x * bytes_per_pixel - offset;              \
+                uint32_t src_y = src_y_start + (y - y_start);                                     \
+                uint32_t src_x = src_x_start + (x - x_start);                                     \
+                uint32_t src_j = src_y * src_bytes_per_line + src_x * bytes_per_pixel;             \
                 uint32_t i = ((v_res - 1 - x) * h_res + y) * bytes_per_pixel;                     \
-                copy_pixel_##_bpp##bpp(to + i, from + j);                                         \
+                copy_pixel_##_bpp##bpp(fb + i, from_base + src_j);                                 \
             }                                                                                     \
         }                                                                                         \
         bytes_to_flush = (x_end - x_start) * bytes_per_line;                                      \
@@ -145,9 +163,11 @@ static inline void copy_pixel_24bpp(uint8_t *to, const uint8_t *from)
         {                                                                                         \
             for (int x = x_start; x < x_end; x++)                                                 \
             {                                                                                     \
-                uint32_t j = y * copy_bytes_per_line + x * bytes_per_pixel - offset;              \
+                uint32_t src_y = src_y_start + (y - y_start);                                     \
+                uint32_t src_x = src_x_start + (x - x_start);                                     \
+                uint32_t src_j = src_y * src_bytes_per_line + src_x * bytes_per_pixel;             \
                 uint32_t i = ((v_res - 1 - x) * h_res + h_res - 1 - y) * bytes_per_pixel;         \
-                copy_pixel_##_bpp##bpp(to + i, from + j);                                         \
+                copy_pixel_##_bpp##bpp(fb + i, from_base + src_j);                                 \
             }                                                                                     \
         }                                                                                         \
         bytes_to_flush = (x_end - x_start) * bytes_per_line;                                      \

components/esp_lcd/test_apps/mipi_dsi_lcd/main/test_mipi_dsi_panel.c

@@ -292,7 +292,6 @@ typedef struct {
 
 typedef struct {
     uint32_t count;
-    SemaphoreHandle_t draw_sem;
 } test_dpi_panel_color_trans_done_callback_ctx_t;
 
 IRAM_ATTR static bool test_ppa_srm_trans_done_callback(ppa_client_handle_t ppa_client, ppa_event_data_t *edata, void *user_ctx)
@@ -307,6 +306,12 @@ IRAM_ATTR static bool test_ppa_srm_trans_done_callback(ppa_client_handle_t ppa_c
         }
     }
 
+    BaseType_t task_woken = pdFALSE;
+    xSemaphoreGiveFromISR(hook_ctx->draw_sem, &task_woken);
+    if (task_woken == pdTRUE) {
+        need_yield = true;
+    }
+
     return need_yield;
 }
 
@@ -353,11 +358,9 @@ static esp_err_t test_draw_bitmap_hook_ppa(esp_lcd_panel_handle_t panel, const e
 
 IRAM_ATTR static bool test_dpi_panel_color_trans_done_count_callback(esp_lcd_panel_handle_t panel, esp_lcd_dpi_panel_event_data_t *edata, void *user_ctx)
 {
-    BaseType_t task_woken = pdFALSE;
     test_dpi_panel_color_trans_done_callback_ctx_t *color_trans_done_ctx = (test_dpi_panel_color_trans_done_callback_ctx_t *)user_ctx;
     color_trans_done_ctx->count++;
-    xSemaphoreGiveFromISR(color_trans_done_ctx->draw_sem, &task_woken);
-    return task_woken == pdTRUE;
+    return false;
 }
 
 TEST_CASE("MIPI DSI use PPA (EK79007)", "[mipi_dsi]")
@@ -437,7 +440,6 @@ TEST_CASE("MIPI DSI use PPA (EK79007)", "[mipi_dsi]")
     };
 
     test_dpi_panel_color_trans_done_callback_ctx_t color_trans_done_ctx = {
-        .draw_sem = draw_sem,
         .count = 0,
     };
     TEST_ESP_OK(esp_lcd_dpi_panel_register_event_callbacks(mipi_dpi_panel, &cbs, &color_trans_done_ctx));
@@ -463,6 +465,7 @@ TEST_CASE("MIPI DSI use PPA (EK79007)", "[mipi_dsi]")
                                      img, 200, 200, 0, 0, 200, 200);
         vTaskDelay(pdMS_TO_TICKS(10));
     }
+    xSemaphoreTake(draw_sem, portMAX_DELAY);
     TEST_ASSERT_EQUAL_INT(100, color_trans_done_ctx.count);
 
     hooks.draw_bitmap_hook = NULL;
@@ -472,7 +475,7 @@ TEST_CASE("MIPI DSI use PPA (EK79007)", "[mipi_dsi]")
     TEST_ESP_OK(esp_lcd_panel_del(mipi_dpi_panel));
     TEST_ESP_OK(esp_lcd_panel_io_del(mipi_dbi_io));
     TEST_ESP_OK(esp_lcd_del_dsi_bus(mipi_dsi_bus));
-    vSemaphoreDelete(draw_sem);
+    vSemaphoreDeleteWithCaps(draw_sem);
     free(img);
 
     test_bsp_disable_dsi_phy_power();

components/esp_lcd/test_apps/rgb_lcd/main/CMakeLists.txt

@@ -5,5 +5,5 @@ set(srcs "test_app_main.c"
 # In order for the cases defined by `TEST_CASE` to be linked into the final elf,
 # the component can be registered as WHOLE_ARCHIVE
 idf_component_register(SRCS ${srcs}
-                       PRIV_REQUIRES esp_lcd unity esp_timer spi_flash
+                       PRIV_REQUIRES esp_lcd unity esp_timer spi_flash esp_driver_ppa efuse
                        WHOLE_ARCHIVE)

components/esp_lcd/test_apps/rgb_lcd/main/test_rgb_panel.c

@@ -9,6 +9,7 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "unity.h"
+#include "soc/soc_caps.h"
 #include "esp_lcd_panel_rgb.h"
 #include "esp_lcd_panel_ops.h"
 #include "esp_random.h"
@@ -17,6 +18,10 @@
 #include "test_rgb_board.h"
 #include "esp_private/spi_flash_os.h"
 #include "esp_clk_tree.h"
+#include "driver/ppa.h"
+#include "esp_efuse.h"
+
+#define ALIGN_DOWN(num, align)  ((num) & ~((align) - 1))
 
 #if CONFIG_LCD_RGB_ISR_IRAM_SAFE
 #define TEST_LCD_CALLBACK_ATTR IRAM_ATTR
@@ -382,3 +387,254 @@ TEST_CASE("lcd_rgb_panel_iram_safe", "[lcd]")
     free(img);
 }
 #endif // CONFIG_LCD_RGB_ISR_IRAM_SAFE
+
+TEST_CASE("lcd_rgb_panel_draw_bitmap_2d", "[lcd]")
+{
+    // Allocate a larger source image (200x200) for testing partial copy
+    size_t src_img_size = 200 * 200 * sizeof(uint16_t);
+    uint8_t *src_img = malloc(src_img_size);
+    TEST_ASSERT_NOT_NULL(src_img);
+
+    printf("initialize RGB panel with stream mode\r\n");
+    esp_lcd_panel_handle_t panel_handle = test_rgb_panel_initialization(16, LCD_COLOR_FMT_RGB565, 0, LCD_CLK_SRC_DEFAULT, false, false, NULL, NULL);
+
+    printf("Draw bitmap 2D by CPU - copy partial region from source to destination\r\n");
+    for (int i = 0; i < 100; i++) {
+        int x_start = rand() % (TEST_LCD_H_RES - 100);
+        int y_start = rand() % (TEST_LCD_V_RES - 100);
+        // Fill source image with random pattern
+        uint8_t color_byte = rand() & 0xFF;
+        memset(src_img, color_byte, src_img_size / 2);
+        color_byte = rand() & 0xFF;
+        memset(src_img + src_img_size / 2, color_byte, src_img_size / 2);
+
+        // Copy a 100x100 region from source (starting at 50,50) to destination at (x_start, y_start)
+        // Source image is 200x200, we copy region from (50,50) to (150,150)
+        esp_lcd_panel_draw_bitmap_2d(panel_handle, x_start, y_start, x_start + 100, y_start + 100,
+                                     src_img, 200, 200, 50, 50, 150, 150);
+        vTaskDelay(pdMS_TO_TICKS(10));
+    }
+    vTaskDelay(pdMS_TO_TICKS(1000));
+
+    printf("delete RGB panel\r\n");
+    TEST_ESP_OK(esp_lcd_panel_del(panel_handle));
+    free(src_img);
+}
+
+#if SOC_HAS(DMA2D)
+TEST_CASE("lcd_rgb_panel_dma2d_hook", "[lcd]")
+{
+    // Allocate a larger source image (200x200) for testing partial copy
+    size_t src_img_size = 200 * 200 * sizeof(uint16_t);
+    size_t buffer_alignment = 1;
+    if (esp_efuse_is_flash_encryption_enabled()) {
+        buffer_alignment = SOC_MEMSPI_ENCRYPTION_ALIGNMENT;
+    }
+    uint8_t *src_img = heap_caps_aligned_calloc(buffer_alignment, 1, src_img_size, MALLOC_CAP_DMA | MALLOC_CAP_SPIRAM);
+    TEST_ASSERT_NOT_NULL(src_img);
+
+    printf("initialize RGB panel with stream mode\r\n");
+    esp_lcd_panel_handle_t panel_handle = test_rgb_panel_initialization(16, LCD_COLOR_FMT_RGB565, 0, LCD_CLK_SRC_DEFAULT, false, false, NULL, NULL);
+
+    printf("Draw bitmap 2D by CPU first\r\n");
+    for (int i = 0; i < 50; i++) {
+        int x_start = rand() % (TEST_LCD_H_RES - 100);
+        int y_start = rand() % (TEST_LCD_V_RES - 100);
+        uint8_t color_byte = rand() & 0xFF;
+        memset(src_img, color_byte, src_img_size / 2);
+        color_byte = rand() & 0xFF;
+        memset(src_img + src_img_size / 2, color_byte, src_img_size / 2);
+        esp_lcd_panel_draw_bitmap_2d(panel_handle, x_start, y_start, x_start + 100, y_start + 100,
+                                     src_img, 200, 200, 50, 50, 150, 150);
+        vTaskDelay(pdMS_TO_TICKS(10));
+    }
+    vTaskDelay(pdMS_TO_TICKS(1000));
+
+    size_t test_block_size = 100;
+    size_t start_alignment = 1;
+    size_t src_x_start = 50;
+    size_t src_y_start = 50;
+    if (esp_efuse_is_flash_encryption_enabled()) {
+        test_block_size = ALIGN_DOWN(test_block_size, SOC_MEMSPI_ENCRYPTION_ALIGNMENT);
+        start_alignment = SOC_MEMSPI_ENCRYPTION_ALIGNMENT;
+        src_x_start = ALIGN_DOWN(src_x_start, SOC_MEMSPI_ENCRYPTION_ALIGNMENT);
+        src_y_start = ALIGN_DOWN(src_y_start, SOC_MEMSPI_ENCRYPTION_ALIGNMENT);
+    }
+
+    printf("Enable DMA2D draw bitmap hook\r\n");
+    TEST_ESP_OK(esp_lcd_rgb_panel_enable_dma2d(panel_handle));
+    printf("Draw bitmap 2D by DMA2D\r\n");
+    for (int i = 0; i < 100; i++) {
+        int x_start = ALIGN_DOWN(rand() % (TEST_LCD_H_RES - test_block_size), start_alignment);
+        int y_start = ALIGN_DOWN(rand() % (TEST_LCD_V_RES - test_block_size), start_alignment);
+        uint8_t color_byte = rand() & 0xFF;
+        memset(src_img, color_byte, src_img_size / 2);
+        color_byte = rand() & 0xFF;
+        memset(src_img + src_img_size / 2, color_byte, src_img_size / 2);
+        esp_lcd_panel_draw_bitmap_2d(panel_handle, x_start, y_start, x_start + test_block_size, y_start + test_block_size,
+                                     src_img, 200, 200, src_x_start, src_y_start, src_x_start + test_block_size, src_y_start + test_block_size);
+        vTaskDelay(pdMS_TO_TICKS(10));
+    }
+    vTaskDelay(pdMS_TO_TICKS(1000));
+
+    printf("Disable DMA2D draw bitmap hook\r\n");
+    TEST_ESP_OK(esp_lcd_rgb_panel_disable_dma2d(panel_handle));
+    vTaskDelay(pdMS_TO_TICKS(1000));
+
+    printf("delete RGB panel\r\n");
+    TEST_ESP_OK(esp_lcd_panel_del(panel_handle));
+    free(src_img);
+}
+#endif // SOC_HAS(DMA2D)
+
+#if SOC_HAS(PPA)
+typedef struct {
+    ppa_client_handle_t ppa_srm_handle;
+    esp_lcd_draw_bitmap_hook_data_t hook_data;
+    SemaphoreHandle_t draw_sem;
+    esp_lcd_panel_handle_t panel;
+} test_rgb_panel_draw_bitmap_hook_ctx_t;
+
+typedef struct {
+    uint32_t count;
+} test_rgb_panel_color_trans_done_callback_ctx_t;
+
+TEST_LCD_CALLBACK_ATTR static bool test_ppa_srm_trans_done_callback(ppa_client_handle_t ppa_client, ppa_event_data_t *edata, void *user_ctx)
+{
+    bool need_yield = false;
+    test_rgb_panel_draw_bitmap_hook_ctx_t *hook_ctx = (test_rgb_panel_draw_bitmap_hook_ctx_t *)user_ctx;
+    esp_lcd_draw_bitmap_hook_data_t *hook_data = &hook_ctx->hook_data;
+
+    if (hook_data->on_hook_end) {
+        if (hook_data->on_hook_end(hook_ctx->panel)) {
+            need_yield = true;
+        }
+    }
+
+    BaseType_t task_woken = pdFALSE;
+    xSemaphoreGiveFromISR(hook_ctx->draw_sem, &task_woken);
+    if (task_woken == pdTRUE) {
+        need_yield = true;
+    }
+
+    return need_yield;
+}
+
+static esp_err_t test_draw_bitmap_hook_ppa(esp_lcd_panel_handle_t panel, const esp_lcd_draw_bitmap_hook_data_t *hook_data, void *user_ctx)
+{
+    test_rgb_panel_draw_bitmap_hook_ctx_t *hook_ctx = (test_rgb_panel_draw_bitmap_hook_ctx_t *)user_ctx;
+    ppa_client_handle_t ppa_srm_handle = hook_ctx->ppa_srm_handle;
+    xSemaphoreTake(hook_ctx->draw_sem, portMAX_DELAY);
+    memcpy(&hook_ctx->hook_data, hook_data, sizeof(esp_lcd_draw_bitmap_hook_data_t));
+    ppa_srm_oper_config_t srm_config = {
+        .in.buffer = hook_data->src_data,
+        .in.pic_w = hook_data->src_x_size,
+        .in.pic_h = hook_data->src_y_size,
+        .in.block_w = hook_data->src_x_end - hook_data->src_x_start,
+        .in.block_h = hook_data->src_y_end - hook_data->src_y_start,
+        .in.block_offset_x = hook_data->src_x_start,
+        .in.block_offset_y = hook_data->src_y_start,
+        .in.srm_cm = PPA_SRM_COLOR_MODE_RGB565,
+        .out.buffer = hook_data->dst_data,
+        .out.buffer_size = hook_data->dst_x_size * hook_data->dst_y_size * hook_data->bits_per_pixel / 8,
+        .out.pic_w = hook_data->dst_x_size,
+        .out.pic_h = hook_data->dst_y_size,
+        .out.block_offset_x = hook_data->dst_x_start,
+        .out.block_offset_y = hook_data->dst_y_start,
+        .out.srm_cm = PPA_SRM_COLOR_MODE_RGB565,
+        .rotation_angle = PPA_SRM_ROTATION_ANGLE_90,
+        .scale_x = 0.5,
+        .scale_y = 0.5,
+        .rgb_swap = 0,
+        .byte_swap = 0,
+        .mode = PPA_TRANS_MODE_NON_BLOCKING,
+        .user_data = hook_ctx,
+    };
+
+    ppa_event_callbacks_t ppa_srm_event_callbacks = {
+        .on_trans_done = test_ppa_srm_trans_done_callback,
+    };
+    TEST_ESP_OK(ppa_client_register_event_callbacks(ppa_srm_handle, &ppa_srm_event_callbacks));
+
+    TEST_ESP_OK(ppa_do_scale_rotate_mirror(ppa_srm_handle, &srm_config));
+
+    return ESP_OK;
+}
+
+TEST_LCD_CALLBACK_ATTR static bool test_rgb_panel_color_trans_done_count_callback(esp_lcd_panel_handle_t panel, const esp_lcd_rgb_panel_event_data_t *edata, void *user_ctx)
+{
+    test_rgb_panel_color_trans_done_callback_ctx_t *color_trans_done_ctx = (test_rgb_panel_color_trans_done_callback_ctx_t *)user_ctx;
+    color_trans_done_ctx->count++;
+    return false;
+}
+
+TEST_CASE("lcd_rgb_panel_ppa_hook", "[lcd]")
+{
+    if (esp_efuse_is_flash_encryption_enabled()) {
+        TEST_PASS_MESSAGE("PPA SRM is not compatible with encrypted memory, skip this test");
+    }
+
+    // Allocate a larger source image (200x200) for testing
+    size_t src_img_size = 200 * 200 * sizeof(uint16_t);
+    uint8_t *src_img = malloc(src_img_size);
+    TEST_ASSERT_NOT_NULL(src_img);
+
+    printf("initialize RGB panel with stream mode\r\n");
+    esp_lcd_panel_handle_t panel_handle = test_rgb_panel_initialization(16, LCD_COLOR_FMT_RGB565, 0, LCD_CLK_SRC_DEFAULT, false, false, NULL, NULL);
+
+    SemaphoreHandle_t draw_sem = xSemaphoreCreateBinaryWithCaps(MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
+    TEST_ASSERT_NOT_NULL(draw_sem);
+    xSemaphoreGive(draw_sem);
+
+    // use PPA to scale and rotate the image in draw bitmap hook
+    ppa_client_handle_t ppa_srm_handle = NULL;
+    ppa_client_config_t ppa_srm_config = {
+        .oper_type = PPA_OPERATION_SRM,
+        .max_pending_trans_num = 1,
+    };
+    TEST_ESP_OK(ppa_register_client(&ppa_srm_config, &ppa_srm_handle));
+
+    esp_lcd_rgb_panel_event_callbacks_t cbs = {
+        .on_color_trans_done = test_rgb_panel_color_trans_done_count_callback,
+    };
+
+    test_rgb_panel_color_trans_done_callback_ctx_t color_trans_done_ctx = {
+        .count = 0,
+    };
+    TEST_ESP_OK(esp_lcd_rgb_panel_register_event_callbacks(panel_handle, &cbs, &color_trans_done_ctx));
+
+    printf("Add PPA draw bitmap hook\r\n");
+    esp_lcd_panel_hooks_t hooks = {
+        .draw_bitmap_hook = test_draw_bitmap_hook_ppa,
+    };
+    test_rgb_panel_draw_bitmap_hook_ctx_t hook_ctx = {
+        .draw_sem = draw_sem,
+        .ppa_srm_handle = ppa_srm_handle,
+        .panel = panel_handle,
+    };
+    TEST_ESP_OK(esp_lcd_rgb_panel_register_hooks(panel_handle, &hooks, &hook_ctx));
+
+    for (int i = 0; i < 100; i++) {
+        int x_start = rand() % (TEST_LCD_H_RES - 100);
+        int y_start = rand() % (TEST_LCD_V_RES - 100);
+        uint8_t color_byte = rand() & 0xFF;
+        memset(src_img, color_byte, src_img_size / 2);
+        color_byte = rand() & 0xFF;
+        memset(src_img + src_img_size / 2, color_byte, src_img_size / 2);
+        esp_lcd_panel_draw_bitmap_2d(panel_handle, x_start, y_start, x_start + 50, y_start + 50,
+                                     src_img, 200, 200, 0, 0, 200, 200);
+        vTaskDelay(pdMS_TO_TICKS(10));
+    }
+    xSemaphoreTake(draw_sem, portMAX_DELAY);
+    TEST_ASSERT_EQUAL_INT(100, color_trans_done_ctx.count);
+
+    hooks.draw_bitmap_hook = NULL;
+    TEST_ESP_OK(esp_lcd_rgb_panel_register_hooks(panel_handle, &hooks, NULL));
+    TEST_ESP_OK(ppa_unregister_client(ppa_srm_handle));
+
+    printf("delete RGB panel\r\n");
+    TEST_ESP_OK(esp_lcd_panel_del(panel_handle));
+    vSemaphoreDeleteWithCaps(draw_sem);
+    free(src_img);
+}
+#endif // SOC_HAS(PPA)

docs/en/api-reference/peripherals/lcd/dsi_lcd.rst

@@ -86,7 +86,7 @@ MIPI DSI Interfaced LCD
 
 #. Configure draw bitmap hook function (optional)
 
-    If you want to use DMA2D to implement draw bitmap, the driver has already implemented the DMA2D draw bitmap hook function, you only need to call :func:`esp_lcd_dpi_panel_enable_dma2d` to enable it.
+    If you want to accelerate 2D bitmap copy with DMA2D, the driver already provides a built-in DMA2D bitmap copy hook. You only need to call :func:`esp_lcd_dpi_panel_enable_dma2d` to enable it.
 
     .. code-block:: c
 
@@ -105,6 +105,58 @@ MIPI DSI Interfaced LCD
         };
         ESP_ERROR_CHECK(esp_lcd_dpi_panel_register_hooks(mipi_dpi_panel, &hooks, &user_ctx));
 
+    If the custom hook is asynchronous — for example, the hook starts a PPA transfer and returns immediately while the hardware continues processing pixels in the background — call :cpp:member:`esp_lcd_draw_bitmap_hook_data_t::on_hook_end` only after the hardware operation has actually finished. ``on_hook_end`` is implemented and filled into ``hook_data`` by the DPI panel driver; you do not need to write it yourself, only call it when the asynchronous operation completes to notify the driver that the draw transaction is finished. If a color transfer done callback has been registered, it is invoked at that time as well.
+
+    The panel driver does not wait for a previous draw to finish; synchronization is the custom hook's responsibility. The simplest approach is to serialize draws (do not start a new one before the previous one completes), as shown in the example below. If you want to submit multiple draws concurrently using an accelerator transaction queue such as PPA's, keep a separate ``hook_data`` copy per transaction, keep the source buffer valid until hardware completion, and handle overlapping destination regions carefully.
+
+    The following snippet shows an asynchronous custom hook: it starts PPA and returns immediately, then calls ``on_hook_end`` from the PPA completion callback. The example serializes draws with a semaphore so only one draw is in flight at a time:
+
+    .. code-block:: c
+
+        typedef struct {
+            esp_lcd_panel_handle_t panel;
+            esp_lcd_draw_bitmap_hook_data_t hook_data;
+            SemaphoreHandle_t draw_sem;
+            // ... other fields, e.g. ppa_client_handle_t
+        } draw_bitmap_hook_ctx_t;
+
+        static bool ppa_trans_done_callback(ppa_client_handle_t ppa_client, ppa_event_data_t *edata, void *user_ctx)
+        {
+            draw_bitmap_hook_ctx_t *ctx = (draw_bitmap_hook_ctx_t *)user_ctx;
+            bool need_yield = false;
+
+            // on_hook_end is provided by the DPI panel driver; just call it when done
+            if (ctx->hook_data.on_hook_end) {
+                if (ctx->hook_data.on_hook_end(ctx->panel)) {
+                    need_yield = true;
+                }
+            }
+
+            BaseType_t task_woken = pdFALSE;
+            xSemaphoreGiveFromISR(ctx->draw_sem, &task_woken);
+            if (task_woken == pdTRUE) {
+                need_yield = true;
+            }
+            return need_yield;
+        }
+
+        static esp_err_t custom_draw_bitmap_hook(esp_lcd_panel_handle_t panel,
+                                                 const esp_lcd_draw_bitmap_hook_data_t *hook_data,
+                                                 void *user_ctx)
+        {
+            draw_bitmap_hook_ctx_t *ctx = (draw_bitmap_hook_ctx_t *)user_ctx;
+
+            // Simplest sync: wait until the previous draw finishes
+            xSemaphoreTake(ctx->draw_sem, portMAX_DELAY);
+
+            // Save hook_data so the completion callback can call on_hook_end later
+            ctx->hook_data = *hook_data;
+
+            // Start an asynchronous PPA transfer, then return immediately
+            // ppa_do_scale_rotate_mirror(...);
+            return ESP_OK;
+        }
+
 Power Supply for MIPI DPHY
 --------------------------
 

docs/en/api-reference/peripherals/lcd/rgb_lcd.rst

@@ -257,6 +257,76 @@ This mode is similar to :ref:`bounce_buffer_with_single_psram_frame_buffer`, but
         In a well-designed embedded application, situations where the DMA cannot deliver data as fast as the LCD consumes it should be avoided. However, such scenarios can theoretically occur. In the {IDF_TARGET_NAME} hardware, this results in the LCD outputting dummy bytes while the DMA waits for data. If the DMA were to run in a continuous stream, it could cause a desynchronization between the LCD address from which the DMA reads data and the address from which the LCD peripheral outputs data, leading to a **permanently** shifted image.
         To prevent this, you can either enable the :ref:`CONFIG_LCD_RGB_RESTART_IN_VSYNC` option, allowing the driver to automatically restart the DMA during the VBlank interrupt, or call :cpp:func:`esp_lcd_rgb_panel_restart` to manually restart the DMA. Note that :cpp:func:`esp_lcd_rgb_panel_restart` does not restart the DMA immediately; instead, the DMA will be restarted at the next VSYNC event.
 
+Draw Bitmap Hook Function
+-------------------------
+
+If you want to accelerate 2D bitmap copy with DMA2D, the driver already provides a built-in DMA2D bitmap copy hook. You only need to call :cpp:func:`esp_lcd_rgb_panel_enable_dma2d` to enable it.
+
+.. code-block:: c
+
+    ESP_ERROR_CHECK(esp_lcd_rgb_panel_enable_dma2d(panel_handle));
+
+If you need more advanced applications, you can add a custom hook for draw bitmap, such as using PPA to implement rotation, scaling, etc.
+
+.. code-block:: c
+
+    esp_lcd_panel_hooks_t hooks = {
+        .draw_bitmap_hook = custom_draw_bitmap_hook,
+    };
+    ESP_ERROR_CHECK(esp_lcd_rgb_panel_register_hooks(panel_handle, &hooks, &user_ctx));
+
+If the custom hook is asynchronous — for example, the hook starts a PPA transfer and returns immediately while the hardware continues processing pixels in the background — call :cpp:member:`esp_lcd_draw_bitmap_hook_data_t::on_hook_end` only after the hardware operation has actually finished. ``on_hook_end`` is implemented and filled into ``hook_data`` by the RGB panel driver; you do not need to write it yourself, only call it when the asynchronous operation completes to notify the driver that the draw transaction is finished. If a color transfer done callback has been registered, it is invoked at that time as well.
+
+The panel driver does not wait for a previous draw to finish; synchronization is the custom hook's responsibility. The simplest approach is to serialize draws (do not start a new one before the previous one completes), as shown in the example below. If you want to submit multiple draws concurrently using an accelerator transaction queue such as PPA's, keep a separate ``hook_data`` copy per transaction, keep the source buffer valid until hardware completion, and handle overlapping destination regions carefully.
+
+The following snippet shows an asynchronous custom hook: it starts PPA and returns immediately, then calls ``on_hook_end`` from the PPA completion callback. The example serializes draws with a semaphore so only one draw is in flight at a time:
+
+.. code-block:: c
+
+    typedef struct {
+        esp_lcd_panel_handle_t panel;
+        esp_lcd_draw_bitmap_hook_data_t hook_data;
+        SemaphoreHandle_t draw_sem;
+        // ... other fields, e.g. ppa_client_handle_t
+    } draw_bitmap_hook_ctx_t;
+
+    static bool ppa_trans_done_callback(ppa_client_handle_t ppa_client, ppa_event_data_t *edata, void *user_ctx)
+    {
+        draw_bitmap_hook_ctx_t *ctx = (draw_bitmap_hook_ctx_t *)user_ctx;
+        bool need_yield = false;
+
+        // on_hook_end is provided by the RGB panel driver; just call it when done
+        if (ctx->hook_data.on_hook_end) {
+            if (ctx->hook_data.on_hook_end(ctx->panel)) {
+                need_yield = true;
+            }
+        }
+
+        BaseType_t task_woken = pdFALSE;
+        xSemaphoreGiveFromISR(ctx->draw_sem, &task_woken);
+        if (task_woken == pdTRUE) {
+            need_yield = true;
+        }
+        return need_yield;
+    }
+
+    static esp_err_t custom_draw_bitmap_hook(esp_lcd_panel_handle_t panel,
+                                             const esp_lcd_draw_bitmap_hook_data_t *hook_data,
+                                             void *user_ctx)
+    {
+        draw_bitmap_hook_ctx_t *ctx = (draw_bitmap_hook_ctx_t *)user_ctx;
+
+        // Simplest sync: wait until the previous draw finishes
+        xSemaphoreTake(ctx->draw_sem, portMAX_DELAY);
+
+        // Save hook_data so the completion callback can call on_hook_end later
+        ctx->hook_data = *hook_data;
+
+        // Start an asynchronous PPA transfer, then return immediately
+        // ppa_do_scale_rotate_mirror(...);
+        return ESP_OK;
+    }
+
 API Reference
 -------------
 

docs/zh_CN/api-reference/peripherals/lcd/dsi_lcd.rst

@@ -86,7 +86,7 @@ MIPI DSI 接口的 LCD
 
 #. 配置绘制位图钩子函数（可选）
 
-    若想使用 DMA2D 实现绘制位图，驱动程序内部已实现 DMA2D 绘制位图的钩子函数，用户只需调用 :func:`esp_lcd_dpi_panel_enable_dma2d` 即可。
+    若想使用 DMA2D 加速位图的复制，驱动程序内部已实现基于 DMA2D 的位图复制钩子函数，用户只需调用 :func:`esp_lcd_dpi_panel_enable_dma2d` 即可。
 
     .. code-block:: c
 
@@ -105,6 +105,58 @@ MIPI DSI 接口的 LCD
         };
         ESP_ERROR_CHECK(esp_lcd_dpi_panel_register_hooks(mipi_dpi_panel, &hooks, &user_ctx));
 
+    如果自定义钩子是异步的——例如钩子函数启动 PPA 后立即返回，真正的像素处理仍由硬件在后台执行——则必须在硬件操作真正完成后再调用 :cpp:member:`esp_lcd_draw_bitmap_hook_data_t::on_hook_end`。该回调由 DPI 面板驱动实现并填入 ``hook_data``，用户无需自行编写，只需在异步操作完成时调用它，以通知驱动结束本次绘制事务；若已注册颜色传输完成回调，也会在此时被调用。
+
+    面板驱动本身不会等待上一笔绘制结束，同步由自定义钩子自行负责。最简单的做法是串行执行（上一笔完成前不启动下一笔），如下面示例所示。若希望利用 PPA 等加速器的事务队列并发提交多笔绘制，则需要为每笔事务单独保存 ``hook_data``、保证源 buffer 在硬件完成前有效，并处理好目标区域重叠等问题。
+
+    下面是一个异步自定义钩子的示意代码：钩子启动 PPA 后立即返回，并在 PPA 完成回调中调用 ``on_hook_end``。示例采用串行方式，用信号量保证同一时间只有一笔绘制在进行：
+
+    .. code-block:: c
+
+        typedef struct {
+            esp_lcd_panel_handle_t panel;
+            esp_lcd_draw_bitmap_hook_data_t hook_data;
+            SemaphoreHandle_t draw_sem;
+            // ... 其他字段，例如 ppa_client_handle_t
+        } draw_bitmap_hook_ctx_t;
+
+        static bool ppa_trans_done_callback(ppa_client_handle_t ppa_client, ppa_event_data_t *edata, void *user_ctx)
+        {
+            draw_bitmap_hook_ctx_t *ctx = (draw_bitmap_hook_ctx_t *)user_ctx;
+            bool need_yield = false;
+
+            // on_hook_end 由 DPI 面板驱动提供，操作完成后直接调用即可
+            if (ctx->hook_data.on_hook_end) {
+                if (ctx->hook_data.on_hook_end(ctx->panel)) {
+                    need_yield = true;
+                }
+            }
+
+            BaseType_t task_woken = pdFALSE;
+            xSemaphoreGiveFromISR(ctx->draw_sem, &task_woken);
+            if (task_woken == pdTRUE) {
+                need_yield = true;
+            }
+            return need_yield;
+        }
+
+        static esp_err_t custom_draw_bitmap_hook(esp_lcd_panel_handle_t panel,
+                                                 const esp_lcd_draw_bitmap_hook_data_t *hook_data,
+                                                 void *user_ctx)
+        {
+            draw_bitmap_hook_ctx_t *ctx = (draw_bitmap_hook_ctx_t *)user_ctx;
+
+            // 最简单的同步方式：等待上一笔完成后再启动本笔
+            xSemaphoreTake(ctx->draw_sem, portMAX_DELAY);
+
+            // 保存 hook_data，供完成回调稍后调用 on_hook_end
+            ctx->hook_data = *hook_data;
+
+            // 启动异步 PPA 传输后立即返回
+            // ppa_do_scale_rotate_mirror(...);
+            return ESP_OK;
+        }
+
 关于 MIPI DPHY 的供电
 ---------------------
 

docs/zh_CN/api-reference/peripherals/lcd/rgb_lcd.rst

@@ -257,6 +257,76 @@ bounce buffer 与 PSRAM frame buffer
         虽说在设计良好的嵌入式应用程序中, DMA 传递数据的速度不应该赶不上 LCD 读取数据的速度。但理论上，此种情况还是有可能出现的。在 {IDF_TARGET_NAME} 的硬件中，这种情况会导致 LCD 在 DMA 等待数据时单纯输出 dummy 字节。若以流式传输运行 DMA，则 DMA 会将读取到的数据传输到某个 LCD 地址，同时 LCD 也会将数据输出到某个 LCD 地址，但上述两个地址可能会不同步，导致图像 **永久** 偏移。
         为防止类似情况发生，可以启用 :ref:`CONFIG_LCD_RGB_RESTART_IN_VSYNC` 选项，以便驱动程序在 VBlank 中断时自动重启 DMA；或者也可以调用 :cpp:func:`esp_lcd_rgb_panel_restart`，手动重启 DMA。请注意，调用 :cpp:func:`esp_lcd_rgb_panel_restart` 不会立即重启 DMA，DMA 只会在下一个 VSYNC 事件中重启。
 
+绘制位图钩子函数
+----------------
+
+若想使用 DMA2D 加速位图的复制，驱动程序内部已实现基于 DMA2D 的位图复制钩子函数，用户只需调用 :cpp:func:`esp_lcd_rgb_panel_enable_dma2d` 即可。
+
+.. code-block:: c
+
+    ESP_ERROR_CHECK(esp_lcd_rgb_panel_enable_dma2d(panel_handle));
+
+若需更高级的应用，用户可为绘制位图添加自定义钩子，例如通过 PPA 实现旋转、缩放等操作。
+
+.. code-block:: c
+
+    esp_lcd_panel_hooks_t hooks = {
+        .draw_bitmap_hook = custom_draw_bitmap_hook,
+    };
+    ESP_ERROR_CHECK(esp_lcd_rgb_panel_register_hooks(panel_handle, &hooks, &user_ctx));
+
+如果自定义钩子是异步的——例如钩子函数启动 PPA 后立即返回，真正的像素处理仍由硬件在后台执行——则必须在硬件操作真正完成后再调用 :cpp:member:`esp_lcd_draw_bitmap_hook_data_t::on_hook_end`。该回调由 RGB 面板驱动实现并填入 ``hook_data``，用户无需自行编写，只需在异步操作完成时调用它，以通知驱动结束本次绘制事务；若已注册颜色传输完成回调，也会在此时被调用。
+
+面板驱动本身不会等待上一笔绘制结束，同步由自定义钩子自行负责。最简单的做法是串行执行（上一笔完成前不启动下一笔），如下面示例所示。若希望利用 PPA 等加速器的事务队列并发提交多笔绘制，则需要为每笔事务单独保存 ``hook_data``、保证源 buffer 在硬件完成前有效，并处理好目标区域重叠等问题。
+
+下面是一个异步自定义钩子的示意代码：钩子启动 PPA 后立即返回，并在 PPA 完成回调中调用 ``on_hook_end``。示例采用串行方式，用信号量保证同一时间只有一笔绘制在进行：
+
+.. code-block:: c
+
+    typedef struct {
+        esp_lcd_panel_handle_t panel;
+        esp_lcd_draw_bitmap_hook_data_t hook_data;
+        SemaphoreHandle_t draw_sem;
+        // ... 其他字段，例如 ppa_client_handle_t
+    } draw_bitmap_hook_ctx_t;
+
+    static bool ppa_trans_done_callback(ppa_client_handle_t ppa_client, ppa_event_data_t *edata, void *user_ctx)
+    {
+        draw_bitmap_hook_ctx_t *ctx = (draw_bitmap_hook_ctx_t *)user_ctx;
+        bool need_yield = false;
+
+        // on_hook_end 由 RGB 面板驱动提供，操作完成后直接调用即可
+        if (ctx->hook_data.on_hook_end) {
+            if (ctx->hook_data.on_hook_end(ctx->panel)) {
+                need_yield = true;
+            }
+        }
+
+        BaseType_t task_woken = pdFALSE;
+        xSemaphoreGiveFromISR(ctx->draw_sem, &task_woken);
+        if (task_woken == pdTRUE) {
+            need_yield = true;
+        }
+        return need_yield;
+    }
+
+    static esp_err_t custom_draw_bitmap_hook(esp_lcd_panel_handle_t panel,
+                                             const esp_lcd_draw_bitmap_hook_data_t *hook_data,
+                                             void *user_ctx)
+    {
+        draw_bitmap_hook_ctx_t *ctx = (draw_bitmap_hook_ctx_t *)user_ctx;
+
+        // 最简单的同步方式：等待上一笔完成后再启动本笔
+        xSemaphoreTake(ctx->draw_sem, portMAX_DELAY);
+
+        // 保存 hook_data，供完成回调稍后调用 on_hook_end
+        ctx->hook_data = *hook_data;
+
+        // 启动异步 PPA 传输后立即返回
+        // ppa_do_scale_rotate_mirror(...);
+        return ESP_OK;
+    }
+
 API 参考
 --------
 

examples/peripherals/lcd/rgb_panel/main/Kconfig.projbuild

@@ -25,6 +25,14 @@ menu "Example Configuration"
                 Allocate one draw buffer in LVGL.
     endchoice
 
+    config EXAMPLE_USE_DMA2D_COPY_FRAME
+        bool "Use DMA2D to copy draw buffer to frame buffer"
+        default y
+        depends on EXAMPLE_USE_SINGLE_FB && SOC_DMA2D_SUPPORTED
+        help
+            Enable this option, DMA2D will be used to copy the LVGL draw buffer to the target frame buffer.
+            This can save some CPU time and improve the performance.
+
     choice EXAMPLE_LCD_DATA_LINES
         prompt "RGB LCD Data Lines"
         default EXAMPLE_LCD_DATA_LINES_16

examples/peripherals/lcd/rgb_panel/main/rgb_lcd_example_main.c

@@ -271,6 +271,12 @@ void app_main(void)
     };
     ESP_ERROR_CHECK(esp_lcd_new_rgb_panel(&panel_config, &panel_handle));
 
+#if CONFIG_EXAMPLE_USE_DMA2D_COPY_FRAME
+    // use DMA2D to copy draw buffer to frame buffer
+    ESP_LOGI(TAG, "RGB panel added DMA2D draw bitmap hook");
+    ESP_ERROR_CHECK(esp_lcd_rgb_panel_enable_dma2d(panel_handle));
+#endif
+
     ESP_LOGI(TAG, "Initialize RGB LCD panel");
     ESP_ERROR_CHECK(esp_lcd_panel_reset(panel_handle));
     ESP_ERROR_CHECK(esp_lcd_panel_init(panel_handle));