feat(isp): support isp dma input and add example

components/esp_driver_isp/include/driver/isp_dma.h

@@ -0,0 +1,39 @@
+/*
+ * SPDX-FileCopyrightText: 2026 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#pragma once
+
+#include <stddef.h>
+#include "esp_err.h"
+#include "driver/isp_types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Process one ISP DMA frame: feed the input buffer through the ISP and wait for completion
+ *
+ * @note Input buffer content should be ready before calling this function. If the buffers are in
+ *       cacheable memory, the caller should synchronize them around DMA access. Buffer sizes are
+ *       derived from the ISP processor resolution and pixel formats. Both buffers must be 8-byte
+ *       aligned. This function blocks until both input and output DMA channels finish.
+ *
+ * @param[in] proc           Processor handle
+ * @param[in] output_buffer  Destination buffer for ISP output (8-byte aligned)
+ * @param[in] input_buffer   Source input buffer for RAW frame data (8-byte aligned)
+ * @param[in] timeout_ms     Timeout in milliseconds for waiting transfer completion
+ *
+ * @return
+ *         - ESP_OK                On success
+ *         - ESP_ERR_INVALID_ARG   Invalid argument
+ *         - ESP_ERR_TIMEOUT       Wait timeout
+ */
+esp_err_t esp_isp_dma_process_frame(isp_proc_handle_t proc, void *output_buffer, const void *input_buffer, uint32_t timeout_ms);
+
+#ifdef __cplusplus
+}
+#endif