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Commit ad0d92d7 authored by Robin Gong's avatar Robin Gong Committed by Vinod Koul
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dmaengine: imx-sdma: refine to load context only once 



The context loaded only one time before channel running,but
currently sdma_config_channel() and dma_prep_* duplicated with
sdma_load_context(), so refine it to load context only one time
before channel running and reload after the channel terminated.

Signed-off-by: default avatarRobin Gong <yibin.gong@nxp.com>
Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent bfeffd15

drivers/dma/imx-sdma.c

+7 −0
Original line number Diff line number Diff line
@@ -377,6 +377,7 @@ struct sdma_channel { 
	unsigned long			watermark_level;

	u32				shp_addr, per_addr;

	enum dma_status			status;

	bool				context_loaded;

	struct imx_dma_data		data;

	struct work_struct		terminate_worker;

};
@@ -970,6 +971,9 @@ static int sdma_load_context(struct sdma_channel *sdmac) 
	int ret;

	unsigned long flags;



	if (sdmac->context_loaded)

		return 0;



	if (sdmac->direction == DMA_DEV_TO_MEM)

		load_address = sdmac->pc_from_device;

	else if (sdmac->direction == DMA_DEV_TO_DEV)
@@ -1012,6 +1016,8 @@ static int sdma_load_context(struct sdma_channel *sdmac) 


	spin_unlock_irqrestore(&sdma->channel_0_lock, flags);



	sdmac->context_loaded = true;



	return ret;

}
@@ -1051,6 +1057,7 @@ static void sdma_channel_terminate_work(struct work_struct *work) 
	sdmac->desc = NULL;

	spin_unlock_irqrestore(&sdmac->vc.lock, flags);

	vchan_dma_desc_free_list(&sdmac->vc, &head);

	sdmac->context_loaded = false;

}



static int sdma_disable_channel_async(struct dma_chan *chan)