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refactor(isp): read DMA input directly from flash

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Avoid the PSRAM copy for unencrypted flash
This commit is contained in:
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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13
components/esp_driver_isp/include/driver/isp_dma.h
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@@ -17,14 +17,15 @@ extern "C" {
/**
* @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.
* @note The driver synchronizes cacheable buffers before and after DMA access. Input buffers use
* an unaligned cache write-back, while cacheable output buffers and their derived frame
* sizes must be aligned to the cache line size.
* @note This function blocks until both input and output DMA channels finish. On timeout,
* the output buffer may still be owned by DMA and must not be accessed.
*
* @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] output_buffer Destination buffer for ISP output
* @param[in] input_buffer Source input buffer for RAW frame data
* @param[in] timeout_ms Timeout in milliseconds for waiting transfer completion
*
* @return