drivers: video: video_stm32_dcmi: Use video buffers for DCMI buffer. (b58671fd) · Commits · Wenxi XU / zephyr

drivers/video/video_stm32_dcmi.c

+12 −10

Original line number	Diff line number	Diff line
		@@ -22,7 +22,9 @@

		LOG_MODULE_REGISTER(video_stm32_dcmi, CONFIG_VIDEO_LOG_LEVEL);

		K_HEAP_DEFINE(video_stm32_buffer_pool, CONFIG_VIDEO_BUFFER_POOL_SZ_MAX);
		#if CONFIG_VIDEO_BUFFER_POOL_NUM_MAX < 2
		#error "The minimum required number of buffers for video_stm32 is 2"
		#endif

		typedef void (irq_config_func_t)(const struct device dev);

		@@ -43,7 +45,7 @@ struct video_stm32_dcmi_data {
		uint32_t height;
		uint32_t width;
		uint32_t pitch;
		uint8_t *buffer;
		struct video_buffer *vbuf;
		};

		struct video_stm32_dcmi_config {
		@@ -75,7 +77,7 @@ void HAL_DCMI_FrameEventCallback(DCMI_HandleTypeDef *hdcmi)
		}

		vbuf->timestamp = k_uptime_get_32();
		memcpy(vbuf->buffer, dev_data->buffer, vbuf->bytesused);
		memcpy(vbuf->buffer, dev_data->vbuf->buffer, vbuf->bytesused);

		k_fifo_put(&dev_data->fifo_out, vbuf);

		@@ -244,16 +246,16 @@ static int video_stm32_dcmi_stream_start(const struct device *dev)
		{
		struct video_stm32_dcmi_data *data = dev->data;
		const struct video_stm32_dcmi_config *config = dev->config;
		size_t buffer_size = data->pitch * data->height;

		data->buffer = k_heap_alloc(&video_stm32_buffer_pool, buffer_size, K_NO_WAIT);
		if (data->buffer == NULL) {
		LOG_ERR("Failed to allocate DCMI buffer for image. Size %d bytes", buffer_size);
		data->vbuf = k_fifo_get(&data->fifo_in, K_NO_WAIT);

		if (data->vbuf == NULL) {
		LOG_ERR("Failed to dequeue a DCMI buffer.");
		return -ENOMEM;
		}

		int err = HAL_DCMI_Start_DMA(&data->hdcmi, DCMI_MODE_CONTINUOUS,
		(uint32_t)data->buffer, buffer_size / 4);
		(uint32_t)data->vbuf->buffer, data->vbuf->bytesused / 4);
		if (err != HAL_OK) {
		LOG_ERR("Failed to start DCMI DMA");
		return -EIO;
		@@ -276,8 +278,8 @@ static int video_stm32_dcmi_stream_stop(const struct device *dev)
		return -EIO;
		}

		/* Release the buffer allocated in stream_start */
		k_heap_free(&video_stm32_buffer_pool, data->buffer);
		/* Release the video buffer allocated in stream_start */
		k_fifo_put(&data->fifo_in, data->vbuf);

		err = HAL_DCMI_Stop(&data->hdcmi);
		if (err != HAL_OK) {

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