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Message-Id: <20240131163318.360315-1-Frank.Li@nxp.com>
Date: Wed, 31 Jan 2024 11:33:18 -0500
From: Frank Li <Frank.Li@....com>
To: Vinod Koul <vkoul@...nel.org>,
imx@...ts.linux.dev (open list:FREESCALE eDMA DRIVER),
dmaengine@...r.kernel.org (open list:FREESCALE eDMA DRIVER),
linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 1/1] dmaengine: fsl-edma: correct calculation of 'nbytes' in multi-fifo scenario
From: Joy Zou <joy.zou@....com>
The 'nbytes' should be equivalent to burst * width in audio multi-fifo
setups. Given that the FIFO width is fixed at 32 bits, adjusts the burst
size for multi-fifo configurations to match the slave maxburst in the
configuration.
Cc: stable@...r.kernel.org
Fixes: 72f5801a4e2b ("dmaengine: fsl-edma: integrate v3 support")
Signed-off-by: Joy Zou <joy.zou@....com>
Signed-off-by: Frank Li <Frank.Li@....com>
---
drivers/dma/fsl-edma-common.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c
index b53f46245c377..793f1a7ad5e34 100644
--- a/drivers/dma/fsl-edma-common.c
+++ b/drivers/dma/fsl-edma-common.c
@@ -503,7 +503,7 @@ void fsl_edma_fill_tcd(struct fsl_edma_chan *fsl_chan,
if (fsl_chan->is_multi_fifo) {
/* set mloff to support multiple fifo */
burst = cfg->direction == DMA_DEV_TO_MEM ?
- cfg->src_addr_width : cfg->dst_addr_width;
+ cfg->src_maxburst : cfg->dst_maxburst;
nbytes |= EDMA_V3_TCD_NBYTES_MLOFF(-(burst * 4));
/* enable DMLOE/SMLOE */
if (cfg->direction == DMA_MEM_TO_DEV) {
--
2.34.1
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