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feat(mipi_dsi): replace the fbcopy driver by the async color conver driver

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morris
2026-06-10 16:07:55 +08:00
parent a7811f9a26
commit 244fa1a61a
4 changed files with 36 additions and 359 deletions
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4
components/esp_lcd/CMakeLists.txt
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@@ -13,10 +13,6 @@ set(includes "include" "interface")
set(priv_requires "esp_mm" "esp_psram" "esp_pm" "esp_driver_i2s" "esp_driver_dma")
set(public_requires "esp_driver_gpio" "esp_driver_i2c" "esp_driver_spi" "esp_driver_parlio" "esp_hal_lcd")
if(CONFIG_SOC_DMA2D_SUPPORTED)
list(APPEND srcs "src/esp_async_fbcpy.c")
endif()
if(CONFIG_SOC_I2C_SUPPORTED)
list(APPEND srcs "i2c/esp_lcd_panel_io_i2c.c")
endif()

82
components/esp_lcd/dsi/esp_lcd_panel_dpi.c
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@@ -6,11 +6,11 @@
#include <sys/param.h>
#include "esp_lcd_panel_interface.h"
#include "esp_lcd_mipi_dsi.h"
#include "esp_async_color_convert.h"
#include "esp_intr_alloc.h"
#include "esp_clk_tree.h"
#include "esp_cache.h"
#include "mipi_dsi_priv.h"
#include "esp_async_fbcpy.h"
#include "esp_memory_utils.h"
#include "esp_private/dw_gdma.h"
#include "hal/color_hal.h"
@@ -44,8 +44,7 @@ struct esp_lcd_dpi_panel_t {
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
esp_async_fbcpy_handle_t fbcpy_handle; // Use DMA2D to do frame buffer copy (only when using DMA2D draw bitmap hook)
SemaphoreHandle_t draw_sem; // A semaphore used to synchronize the draw operations when DMA2D is used
async_color_convert_handle_t fbcpy_handle; // Async color convert handle used for same-format DMA2D frame buffer copy
#if CONFIG_PM_ENABLE
esp_pm_lock_handle_t pm_lock; // Power management lock
@@ -65,24 +64,18 @@ static bool dpi_panel_draw_bitmap_hook_end(esp_lcd_panel_t *panel)
return false;
}
static bool async_fbcpy_done_cb(esp_async_fbcpy_handle_t mcp, esp_async_fbcpy_event_data_t *event, void *cb_args)
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_lcd_dpi_panel_t *dpi_panel = (esp_lcd_dpi_panel_t *)cb_args;
// release the draw semaphore first
BaseType_t task_woken = pdFALSE;
xSemaphoreGiveFromISR(dpi_panel->draw_sem, &task_woken);
if (task_woken == pdTRUE) {
need_yield = true;
}
(void)conv_hdl;
(void)event;
if (dpi_panel->on_hook_end) {
if (dpi_panel->on_hook_end(&dpi_panel->base)) {
need_yield = true;
}
}
return need_yield;
}
@@ -475,28 +468,31 @@ static esp_err_t dpi_panel_draw_bitmap_dma2d_hook(esp_lcd_panel_t *panel, const
{
ESP_LOGV(TAG, "copy draw buffer by DMA2D");
esp_lcd_dpi_panel_t *dpi_panel = __containerof(panel, esp_lcd_dpi_panel_t, base);
// ensure the previous draw operation is finished
ESP_RETURN_ON_FALSE(xSemaphoreTake(dpi_panel->draw_sem, 0) == pdTRUE, ESP_ERR_INVALID_STATE,
TAG, "previous draw operation is not finished");
(void)hook_ctx;
esp_async_fbcpy_trans_desc_t fbcpy_trans_config = {
async_color_convert_request_t fbcpy_trans_config = {
.src_buffer = hook_data->src_data,
.dst_buffer = hook_data->dst_data,
.src_buffer_size_x = hook_data->src_x_size,
.src_buffer_size_y = hook_data->src_y_size,
.dst_buffer_size_x = hook_data->dst_x_size,
.dst_buffer_size_y = hook_data->dst_y_size,
.src_offset_x = hook_data->src_x_start,
.src_offset_y = hook_data->src_y_start,
.dst_offset_x = hook_data->dst_x_start,
.dst_offset_y = hook_data->dst_y_start,
.copy_size_x = hook_data->src_x_end - hook_data->src_x_start,
.copy_size_y = hook_data->src_y_end - hook_data->src_y_start,
.pixel_format_fourcc_id = dpi_panel->in_color_format,
.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 = dpi_panel->in_color_format,
.dst_color_format = dpi_panel->in_color_format,
};
// save the on_hook_end callback, and invoke it when the async memcpy is done
// 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.
dpi_panel->on_hook_end = hook_data->on_hook_end;
ESP_RETURN_ON_ERROR(esp_async_fbcpy(dpi_panel->fbcpy_handle, &fbcpy_trans_config, async_fbcpy_done_cb, dpi_panel), TAG, "async memcpy failed");
ESP_RETURN_ON_ERROR(esp_async_color_convert(dpi_panel->fbcpy_handle, &fbcpy_trans_config, async_fbcpy_done_cb, dpi_panel), TAG, "async frame buffer copy failed");
return ESP_OK;
}
@@ -521,13 +517,11 @@ esp_err_t esp_lcd_dpi_panel_enable_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 is already registered");
// Initialize DMA2D resources
esp_async_fbcpy_config_t fbcpy_config = {};
ESP_RETURN_ON_ERROR(esp_async_fbcpy_install(&fbcpy_config, &dpi_panel->fbcpy_handle), TAG, "install async memcpy 2d failed");
// 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, &dpi_panel->fbcpy_handle), TAG, "install async frame buffer copy backend failed");
dpi_panel->draw_sem = xSemaphoreCreateBinaryWithCaps(DSI_MEM_ALLOC_CAPS);
ESP_GOTO_ON_FALSE(dpi_panel->draw_sem, ESP_ERR_NO_MEM, err, TAG, "no memory for draw semaphore");
xSemaphoreGive(dpi_panel->draw_sem);
// Register the DMA2D draw bitmap hook
esp_lcd_panel_hooks_t hooks = {
.draw_bitmap_hook = dpi_panel_draw_bitmap_dma2d_hook,
@@ -538,13 +532,10 @@ esp_err_t esp_lcd_dpi_panel_enable_dma2d(esp_lcd_panel_handle_t panel)
err:
if (dpi_panel->fbcpy_handle) {
esp_async_fbcpy_uninstall(dpi_panel->fbcpy_handle);
esp_async_color_convert_uninstall(dpi_panel->fbcpy_handle);
dpi_panel->fbcpy_handle = NULL;
}
if (dpi_panel->draw_sem) {
vSemaphoreDeleteWithCaps(dpi_panel->draw_sem);
dpi_panel->draw_sem = NULL;
}
dpi_panel->on_hook_end = NULL;
return ret;
}
@@ -561,13 +552,10 @@ esp_err_t esp_lcd_dpi_panel_disable_dma2d(esp_lcd_panel_handle_t panel)
};
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_fbcpy_uninstall(dpi_panel->fbcpy_handle), TAG, "uninstall DMA2D failed");
ESP_RETURN_ON_ERROR(esp_async_color_convert_uninstall(dpi_panel->fbcpy_handle), TAG, "uninstall DMA2D failed");
dpi_panel->fbcpy_handle = NULL;
}
if (dpi_panel->draw_sem) {
vSemaphoreDeleteWithCaps(dpi_panel->draw_sem);
dpi_panel->draw_sem = NULL;
}
dpi_panel->on_hook_end = NULL;
return ESP_OK;
}
@@ -633,7 +621,9 @@ static esp_err_t dpi_panel_draw_bitmap_2d(esp_lcd_panel_t *panel, int x_start, i
}
} else if (dpi_panel->draw_bitmap_hook) { // 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
// 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,

90
components/esp_lcd/priv_include/esp_async_fbcpy.h
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@@ -1,90 +0,0 @@
/*
* SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include "esp_err.h"
#include "hal/color_types.h"
/**
* @brief Async FrameBuffer copy context
*/
typedef struct esp_async_fbcpy_context_t *esp_async_fbcpy_handle_t;
/**
* @brief Async FrameBuffer copy configuration
*/
typedef struct {
} esp_async_fbcpy_config_t;
/**
* @brief Install Async FrameBuffer copy driver
*
* @param config Async FrameBuffer copy configuration
* @param mcp Returned Async FrameBuffer copy handle
* @return
* - ESP_OK: Install Async FrameBuffer copy driver successfully
* - ESP_ERR_INVALID_ARG: Install Async FrameBuffer copy driver failed because of invalid argument
* - ESP_ERR_NO_MEM: Install Async FrameBuffer copy driver failed because of out of memory
* - ESP_FAIL: Install Async FrameBuffer copy driver failed because of other error
*/
esp_err_t esp_async_fbcpy_install(const esp_async_fbcpy_config_t *config, esp_async_fbcpy_handle_t *mcp);
/**
* @brief Uninstall Async FrameBuffer copy driver
*
* @param mcp Async FrameBuffer copy handle
* @return
* - ESP_OK: Uninstall Async FrameBuffer copy driver successfully
* - ESP_ERR_INVALID_ARG: Uninstall Async FrameBuffer copy driver failed because of invalid argument
* - ESP_FAIL: Uninstall Async FrameBuffer copy driver failed because of other error
*/
esp_err_t esp_async_fbcpy_uninstall(esp_async_fbcpy_handle_t mcp);
/**
* @brief Async FrameBuffer copy transaction descriptor
*/
typedef struct {
const void *src_buffer; /*!< Source buffer */
void *dst_buffer; /*!< Destination buffer */
size_t src_buffer_size_x; /*!< Source buffer size in x direction, size count in the number of pixels */
size_t src_buffer_size_y; /*!< Source buffer size in y direction, size count in the number of pixels */
size_t dst_buffer_size_x; /*!< Destination buffer size in x direction, size count in the number of pixels */
size_t dst_buffer_size_y; /*!< Destination buffer size in y direction, size count in the number of pixels */
size_t src_offset_x; /*!< Copy action will start from this offset in source buffer in the x direction, offset count in the number of pixels */
size_t src_offset_y; /*!< Copy action will start from this offset in source buffer in the y direction, offset count in the number of pixels */
size_t dst_offset_x; /*!< Copy action will start from this offset in destination buffer in the x direction, offset count in the number of pixels */
size_t dst_offset_y; /*!< Copy action will start from this offset in destination buffer in the y direction, offset count in the number of pixels */
size_t copy_size_x; /*!< Copy size in the x direction, size count in the number of pixels */
size_t copy_size_y; /*!< Copy size in the y direction, size count in the number of pixels */
esp_color_fourcc_t pixel_format_fourcc_id; /*!< Pixel format unique ID */
} esp_async_fbcpy_trans_desc_t;
/**
* @brief Async FrameBuffer copy event data
*/
typedef struct {
} esp_async_fbcpy_event_data_t;
/**
* @brief Async FrameBuffer copy event callback prototype
*/
typedef bool (*esp_async_fbcpy_event_callback_t)(esp_async_fbcpy_handle_t mcp, esp_async_fbcpy_event_data_t *event_data, void *cb_args);
/**
* @brief Start Async FrameBuffer copy transaction
*
* @param mcp Async FrameBuffer copy handle
* @param transaction Async FrameBuffer copy transaction descriptor
* @param memcpy_done_cb Callback function that will be invoked when Async FrameBuffer copy transaction finishes
* @param cb_args User data
* @return
* - ESP_OK: Start Async FrameBuffer copy transaction successfully
* - ESP_ERR_INVALID_ARG: Start Async FrameBuffer copy transaction failed because of invalid argument
* - ESP_FAIL: Start Async FrameBuffer copy transaction failed because of other error
*/
esp_err_t esp_async_fbcpy(esp_async_fbcpy_handle_t mcp, esp_async_fbcpy_trans_desc_t* transaction,
esp_async_fbcpy_event_callback_t memcpy_done_cb, void *cb_args);

219
components/esp_lcd/src/esp_async_fbcpy.c
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@@ -1,219 +0,0 @@
/*
* SPDX-FileCopyrightText: 2023-2026 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_check.h"
#include "esp_cache.h"
#include "esp_heap_caps.h"
#include "soc/dma2d_channel.h"
#include "hal/cache_hal.h"
#include "hal/cache_ll.h"
#include "hal/dma2d_ll.h"
#include "esp_private/dma2d.h"
#include "esp_async_fbcpy.h"
#define ALIGN_UP(num, align) (((num) + ((align) - 1)) & ~((align) - 1))
static const char *TAG = "async_fbcpy";
typedef struct esp_async_fbcpy_context_t {
dma2d_pool_handle_t client; // DMA2D client
dma2d_descriptor_t* tx_desc; // DMA2D TX descriptor
dma2d_descriptor_t* rx_desc; // DMA2D RX descriptor
dma2d_trans_t* trans_desc; // DMA2D transaction descriptor
size_t dma_desc_size; // DMA2D descriptor size
esp_async_fbcpy_event_callback_t memcpy_done_cb; // memory copy done callback
void *cb_args; // callback arguments
} esp_async_fbcpy_context_t;
static esp_err_t async_fbcpy_del_context(esp_async_fbcpy_context_t* ctx)
{
if (ctx->tx_desc) {
free(ctx->tx_desc);
}
if (ctx->rx_desc) {
free(ctx->rx_desc);
}
if (ctx->trans_desc) {
free(ctx->trans_desc);
}
if (ctx->client) {
dma2d_release_pool(ctx->client);
}
free(ctx);
return ESP_OK;
}
esp_err_t esp_async_fbcpy_install(const esp_async_fbcpy_config_t *config, esp_async_fbcpy_handle_t *mcp)
{
esp_err_t ret = ESP_OK;
esp_async_fbcpy_context_t *ctx = NULL;
dma2d_trans_t* trans_desc = NULL;
dma2d_descriptor_t* dma_tx_desc = NULL;
dma2d_descriptor_t* dma_rx_desc = NULL;
dma2d_pool_handle_t dma2d_client = NULL;
ESP_RETURN_ON_FALSE(config && mcp, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
// allocate context memory
ctx = heap_caps_calloc(1, sizeof(esp_async_fbcpy_context_t), MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
ESP_GOTO_ON_FALSE(ctx, ESP_ERR_NO_MEM, err, TAG, "no mem for esp_async_fbcpy_context_t");
// according to the dma2d design, the transaction descriptor is also saved by the user
trans_desc = heap_caps_calloc(1, dma2d_get_trans_elm_size(), MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
ESP_GOTO_ON_FALSE(trans_desc, ESP_ERR_NO_MEM, err, TAG, "no mem for trans_desc");
ctx->trans_desc = trans_desc;
// allocate memory for DMA descriptor, the descriptor must be allocated from the internal memory, and alignment to the cache line size
uint32_t data_cache_line_size = cache_hal_get_cache_line_size(CACHE_LL_LEVEL_INT_MEM, CACHE_TYPE_DATA);
size_t alignment = MAX(DMA2D_LL_DESC_ALIGNMENT, data_cache_line_size);
size_t dma_desc_mem_size = ALIGN_UP(sizeof(dma2d_descriptor_align8_t), alignment);
dma_tx_desc = heap_caps_aligned_calloc(alignment, 1, dma_desc_mem_size, MALLOC_CAP_DMA | MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
dma_rx_desc = heap_caps_aligned_calloc(alignment, 1, dma_desc_mem_size, MALLOC_CAP_DMA | MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
ESP_GOTO_ON_FALSE(dma_tx_desc && dma_rx_desc, ESP_ERR_NO_MEM, err, TAG, "no memory for DMA2D descriptors");
ctx->tx_desc = dma_tx_desc;
ctx->rx_desc = dma_rx_desc;
ctx->dma_desc_size = dma_desc_mem_size;
// initialize DMA2D client
dma2d_pool_config_t dma2d_client_config = {}; // all follow default configurations
ESP_GOTO_ON_ERROR(dma2d_acquire_pool(&dma2d_client_config, &dma2d_client), err, TAG, "create DMA2D client failed");
ctx->client = dma2d_client;
*mcp = ctx;
return ESP_OK;
err:
if (ctx) {
async_fbcpy_del_context(ctx);
}
return ret;
}
esp_err_t esp_async_fbcpy_uninstall(esp_async_fbcpy_handle_t mcp)
{
ESP_RETURN_ON_FALSE(mcp, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
return async_fbcpy_del_context(mcp);
}
static void async_memcpy_setup_dma2d_descriptor(esp_async_fbcpy_context_t* mcp_ctx, esp_async_fbcpy_trans_desc_t* transaction)
{
dma2d_descriptor_t* tx_desc = mcp_ctx->tx_desc;
dma2d_descriptor_t* rx_desc = mcp_ctx->rx_desc;
size_t dma_desc_size = mcp_ctx->dma_desc_size;
uint8_t dma2d_pbyte = dma2d_desc_pixel_format_to_pbyte_value(transaction->pixel_format_fourcc_id);
tx_desc->buffer = (void*)transaction->src_buffer;
tx_desc->next = NULL;
tx_desc->dma2d_en = 1;
tx_desc->suc_eof = 1;
tx_desc->ha_length = transaction->src_buffer_size_x;
tx_desc->va_size = transaction->src_buffer_size_y;
tx_desc->hb_length = transaction->copy_size_x;
tx_desc->vb_size = transaction->copy_size_y;
tx_desc->x = transaction->src_offset_x;
tx_desc->y = transaction->src_offset_y;
tx_desc->pbyte = dma2d_pbyte;
tx_desc->mode = DMA2D_DESCRIPTOR_BLOCK_RW_MODE_SINGLE;
tx_desc->owner = DMA2D_DESCRIPTOR_BUFFER_OWNER_DMA;
rx_desc->buffer = transaction->dst_buffer;
rx_desc->next = NULL;
rx_desc->dma2d_en = 1;
rx_desc->suc_eof = 1;
rx_desc->ha_length = transaction->dst_buffer_size_x;
rx_desc->va_size = transaction->dst_buffer_size_y;
rx_desc->hb_length = transaction->copy_size_x;
rx_desc->vb_size = transaction->copy_size_y;
rx_desc->x = transaction->dst_offset_x;
rx_desc->y = transaction->dst_offset_y;
rx_desc->pbyte = dma2d_pbyte;
rx_desc->mode = DMA2D_DESCRIPTOR_BLOCK_RW_MODE_SINGLE;
rx_desc->owner = DMA2D_DESCRIPTOR_BUFFER_OWNER_DMA;
esp_cache_msync(tx_desc, dma_desc_size, ESP_CACHE_MSYNC_FLAG_DIR_C2M | ESP_CACHE_MSYNC_FLAG_INVALIDATE);
esp_cache_msync(rx_desc, dma_desc_size, ESP_CACHE_MSYNC_FLAG_DIR_C2M | ESP_CACHE_MSYNC_FLAG_INVALIDATE);
}
static bool dma2d_memcpy_done_cb(dma2d_channel_handle_t dma2d_chan, dma2d_event_data_t *event_data, void *user_data)
{
bool need_yield = false;
esp_async_fbcpy_context_t* mcp = (esp_async_fbcpy_context_t*)user_data;
if (mcp->memcpy_done_cb) {
need_yield = mcp->memcpy_done_cb(mcp, NULL, mcp->cb_args);
}
return need_yield;
}
static bool dma2d_job_picked_cb(uint32_t num_chans, const dma2d_trans_channel_info_t *dma2d_chans, void *user_data)
{
esp_async_fbcpy_context_t* mcp = (esp_async_fbcpy_context_t*)user_data;
dma2d_channel_handle_t tx_chan = NULL;
dma2d_channel_handle_t rx_chan = NULL;
for (uint32_t i = 0; i < num_chans; i++) {
if (dma2d_chans[i].dir == DMA2D_CHANNEL_DIRECTION_TX) {
tx_chan = dma2d_chans[i].chan;
}
if (dma2d_chans[i].dir == DMA2D_CHANNEL_DIRECTION_RX) {
rx_chan = dma2d_chans[i].chan;
}
}
dma2d_trigger_t trig_periph = {
.periph = DMA2D_TRIG_PERIPH_M2M,
.periph_sel_id = SOC_DMA2D_TRIG_PERIPH_M2M_TX,
};
dma2d_connect(tx_chan, &trig_periph);
trig_periph.periph_sel_id = SOC_DMA2D_TRIG_PERIPH_M2M_RX;
dma2d_connect(rx_chan, &trig_periph);
dma2d_rx_event_callbacks_t dma_cbs = {
.on_recv_eof = dma2d_memcpy_done_cb,
};
dma2d_register_rx_event_callbacks(rx_chan, &dma_cbs, mcp);
// 2D-DMA channel data burst length is set to the maximum burst length by default, which meets the encryption alignment restriction
// so even if flash encryption is enabled, it can work properly
dma2d_set_desc_addr(tx_chan, (intptr_t)(mcp->tx_desc));
dma2d_set_desc_addr(rx_chan, (intptr_t)(mcp->rx_desc));
dma2d_start(tx_chan);
dma2d_start(rx_chan);
return false;
}
esp_err_t esp_async_fbcpy(esp_async_fbcpy_handle_t mcp, esp_async_fbcpy_trans_desc_t* transaction, esp_async_fbcpy_event_callback_t memcpy_done_cb, void *cb_args)
{
ESP_RETURN_ON_FALSE(mcp && transaction, ESP_ERR_INVALID_ARG, TAG, "invalid argument");
ESP_RETURN_ON_FALSE(transaction->copy_size_x > 0 && transaction->copy_size_y > 0, ESP_ERR_INVALID_ARG, TAG, "invalid copy size");
mcp->memcpy_done_cb = memcpy_done_cb;
mcp->cb_args = cb_args;
// Write back the user's draw buffer only when it is behind cache, so that the DMA can see the correct data.
// Note, the user src buffer may not be contiguous, write back from the head to the tail anyways.
size_t bits_per_pixel = color_hal_pixel_format_fourcc_get_bit_depth(transaction->pixel_format_fourcc_id);
size_t copy_head = (transaction->src_offset_x + transaction->src_offset_y * transaction->src_buffer_size_x) * bits_per_pixel / 8;
size_t copy_size = (transaction->copy_size_x + (transaction->copy_size_y - 1) * transaction->src_buffer_size_x) * bits_per_pixel / 8;
void *copy_start = (void *)((const uint8_t *)transaction->src_buffer + copy_head);
size_t cache_line_size = esp_cache_get_line_size_by_addr(copy_start);
if (cache_line_size > 0) {
ESP_RETURN_ON_ERROR(esp_cache_msync(copy_start, copy_size, ESP_CACHE_MSYNC_FLAG_DIR_C2M | ESP_CACHE_MSYNC_FLAG_UNALIGNED), TAG, "writeback draw buffer failed");
}
// mount the data to the DMA descriptor
async_memcpy_setup_dma2d_descriptor(mcp, transaction);
// submit the DMA2D request
static dma2d_trans_config_t dma2d_trans_conf = {
.tx_channel_num = 1,
.rx_channel_num = 1,
.channel_flags = DMA2D_CHANNEL_FUNCTION_FLAG_SIBLING,
.on_job_picked = dma2d_job_picked_cb,
};
dma2d_trans_conf.user_config = mcp;
ESP_RETURN_ON_ERROR(dma2d_enqueue(mcp->client, &dma2d_trans_conf, mcp->trans_desc), TAG, "DMA2D enqueue failed");
return ESP_OK;
}