linux-kernel - [PATCH 4/6] dmaengine: imx-sdma: use common config at dma

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Message-Id: <20260114-dma_common_config-v1-4-64feb836ff04@nxp.com>
Date: Wed, 14 Jan 2026 12:12:45 -0500
From: Frank Li <Frank.Li@....com>
To: Vinod Koul <vkoul@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>
Cc: dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org, 
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 Frank Li <Frank.Li@....com>
Subject: [PATCH 4/6] dmaengine: imx-sdma: use common config at dma_chan

Use common config at dma_chan. No functional change.

Signed-off-by: Frank Li <Frank.Li@....com>
---
 drivers/dma/imx-sdma.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index ed9e56de5a9b9484c6598d438f66a836504818be..13a9522eb914bd7808a079fd661d99e8fcff6a0b 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -413,7 +413,6 @@ struct sdma_desc {
  * @sdma:		pointer to the SDMA engine for this channel
  * @channel:		the channel number, matches dmaengine chan_id + 1
  * @direction:		transfer type. Needed for setting SDMA script
- * @slave_config:	Slave configuration
  * @peripheral_type:	Peripheral type. Needed for setting SDMA script
  * @event_id0:		aka dma request line
  * @event_id1:		for channels that use 2 events
@@ -449,7 +448,6 @@ struct sdma_channel {
 	struct sdma_engine		*sdma;
 	unsigned int			channel;
 	enum dma_transfer_direction		direction;
-	struct dma_slave_config		slave_config;
 	enum sdma_peripheral_type	peripheral_type;
 	unsigned int			event_id0;
 	unsigned int			event_id1;
@@ -1647,7 +1645,7 @@ static struct dma_async_tx_descriptor *sdma_prep_slave_sg(
 	struct scatterlist *sg;
 	struct sdma_desc *desc;
 
-	sdma_config_write(chan, &sdmac->slave_config, direction);
+	sdma_config_write(chan, &chan->config, direction);
 
 	desc = sdma_transfer_init(sdmac, direction, sg_len);
 	if (!desc)
@@ -1739,7 +1737,7 @@ static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
 	if (sdmac->peripheral_type != IMX_DMATYPE_HDMI)
 		num_periods = buf_len / period_len;
 
-	sdma_config_write(chan, &sdmac->slave_config, direction);
+	sdma_config_write(chan, &chan->config, direction);
 
 	desc = sdma_transfer_init(sdmac, direction, num_periods);
 	if (!desc)
@@ -1838,8 +1836,6 @@ static int sdma_config(struct dma_chan *chan,
 	struct sdma_channel *sdmac = to_sdma_chan(chan);
 	struct sdma_engine *sdma = sdmac->sdma;
 
-	memcpy(&sdmac->slave_config, dmaengine_cfg, sizeof(*dmaengine_cfg));
-
 	if (dmaengine_cfg->peripheral_config) {
 		struct sdma_peripheral_config *sdmacfg = dmaengine_cfg->peripheral_config;
 		if (dmaengine_cfg->peripheral_size != sizeof(struct sdma_peripheral_config)) {

-- 
2.34.1