Subject: [PATCH v4 4/9] dmaengine: dw-edma: Use new .device_prep_config_sg() callback

From: Frank Li <[email-masked]>
Date: Wed, 06 May 2026 16:44:16 -0400

Use the new .device_prep_config_sg() callback to combine configuration and
descriptor preparation.

No functional changes.

Tested-by: Niklas Cassel <[email-masked]>
Reviewed-by: Damien Le Moal <[email-masked]>
Signed-off-by: Frank Li <[email-masked]>
---
change in v4
- drop context in callback.
change in v3
- add Damien Le Moal review tag
---
 drivers/dma/dw-edma/dw-edma-core.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index c2feb3adc79fa94b016913443305b9fae9deef12..f7f58b0010e26b529ffb7382d5b166a703587c71 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -577,10 +577,11 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
 }
 
 static struct dma_async_tx_descriptor *
-dw_edma_device_prep_slave_sg(struct dma_chan *dchan, struct scatterlist *sgl,
-			     unsigned int len,
-			     enum dma_transfer_direction direction,
-			     unsigned long flags, void *context)
+dw_edma_device_prep_config_sg(struct dma_chan *dchan, struct scatterlist *sgl,
+			      unsigned int len,
+			      enum dma_transfer_direction direction,
+			      unsigned long flags,
+			      struct dma_slave_config *config)
 {
 	struct dw_edma_transfer xfer;
 
@@ -591,6 +592,9 @@ dw_edma_device_prep_slave_sg(struct dma_chan *dchan, struct scatterlist *sgl,
 	xfer.flags = flags;
 	xfer.type = EDMA_XFER_SCATTER_GATHER;
 
+	if (config)
+		dw_edma_device_config(dchan, config);
+
 	return dw_edma_device_transfer(&xfer);
 }
 
@@ -970,7 +974,7 @@ static int dw_edma_channel_setup(struct dw_edma *dw, u32 wr_alloc, u32 rd_alloc)
 	dma->device_terminate_all = dw_edma_device_terminate_all;
 	dma->device_issue_pending = dw_edma_device_issue_pending;
 	dma->device_tx_status = dw_edma_device_tx_status;
-	dma->device_prep_slave_sg = dw_edma_device_prep_slave_sg;
+	dma->device_prep_config_sg = dw_edma_device_prep_config_sg;
 	dma->device_prep_dma_cyclic = dw_edma_device_prep_dma_cyclic;
 	dma->device_prep_interleaved_dma = dw_edma_device_prep_interleaved_dma;

-- 
2.43.0