Commit 9ba17def authored by Joy Zou's avatar Joy Zou Committed by Vinod Koul
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dmaengine: fsl-edma: correct calculation of 'nbytes' in multi-fifo scenario 



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@vger.kernel.org
Fixes: 72f5801a ("dmaengine: fsl-edma: integrate v3 support")
Signed-off-by: default avatarJoy Zou <joy.zou@nxp.com>
Signed-off-by: default avatarFrank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20240131163318.360315-1-Frank.Li@nxp.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 87a39071

drivers/dma/fsl-edma-common.c

+1 −1
Original line number Diff line number Diff line
@@ -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) {