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refactor(isp): read DMA input directly from flash

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Avoid the PSRAM copy for unencrypted flash
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morris
2026-07-20 12:44:18 +08:00
committed by Gao Xu
parent 3e162786cb
commit 8163ee0de8
10 changed files with 77 additions and 52 deletions
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docs/en/api-reference/peripherals/isp.rst
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@@ -248,7 +248,7 @@ ISP DMA Input
Besides image streams from camera controllers, the ISP can also read image frames from system memory through DW-GDMA. To use DMA input, set :cpp:member:`esp_isp_processor_cfg_t::input_data_source` in :cpp:type:`esp_isp_processor_cfg_t` to :cpp:enumerator:`ISP_INPUT_DATA_SOURCE_DWGDMA`, and configure the input format, output format, and resolution according to the image frame.
DMA input is useful for feeding software-generated data, offline RAW images, or other test images in memory into the ISP. It can be used to validate an ISP pipeline without a camera sensor, reproduce issues with a specific input image. Call :cpp:func:`esp_isp_dma_process_frame` to send one input buffer to the ISP and write the processed image into an output buffer. The input and output buffers must be accessible by DMA; if cacheable memory is used, perform the required cache synchronization before and after the DMA transfer.
DMA input is useful for feeding software-generated data, offline RAW images, or other test images in memory into the ISP. It can be used to validate an ISP pipeline without a camera sensor, reproduce issues with a specific input image. Call :cpp:func:`esp_isp_dma_process_frame` to send one input buffer to the ISP and write the processed image into an output buffer. The input and output buffers must be accessible by DMA. The driver synchronizes cacheable buffers automatically. Input buffers use an unaligned cache write-back; cacheable output buffer addresses and their derived frame sizes must be aligned to the cache line size.
ISP AF Controller
~~~~~~~~~~~~~~~~~

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docs/zh_CN/api-reference/peripherals/isp.rst
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@@ -248,7 +248,7 @@ ISP DMA 输入
除来自摄像头控制器的数据流外，ISP 还可以通过 DW-GDMA 从系统存储中读取图像帧作为输入。使用 DMA 输入时，应在 :cpp:type:`esp_isp_processor_cfg_t` 中将 :cpp:member:`esp_isp_processor_cfg_t::input_data_source` 配置为 :cpp:enumerator:`ISP_INPUT_DATA_SOURCE_DWGDMA`，并根据输入图像格式设置输入、输出格式及分辨率。
DMA 输入适用于将软件生成的数据、离线保存的 RAW 图像或其他内存中的测试图像送入 ISP 进行处理。它可用于无摄像头传感器参与时验证 ISP 流水线、复现特定输入图像的问题。调用 :cpp:func:`esp_isp_dma_process_frame` 可以将一帧输入缓冲区送入 ISP，并将处理后的图像写入输出缓冲区。输入和输出缓冲区需要满足 DMA 访问要求；若使用带 cache 的内存，请在 DMA 传输前后执行必要的 cache 同步。
DMA 输入适用于将软件生成的数据、离线保存的 RAW 图像或其他内存中的测试图像送入 ISP 进行处理。它可用于无摄像头传感器参与时验证 ISP 流水线、复现特定输入图像的问题。调用 :cpp:func:`esp_isp_dma_process_frame` 可以将一帧输入缓冲区送入 ISP，并将处理后的图像写入输出缓冲区。输入和输出缓冲区需要满足 DMA 访问要求。驱动会自动同步带 cache 的缓冲区：输入使用允许未对齐的 cache writeback；带 cache 的输出地址及其派生帧大小必须按 cache line 大小对齐。
ISP AF 控制器
~~~~~~~~~~~~~