Unverified Commit 870b89d1 authored by Chancel Liu's avatar Chancel Liu Committed by Mark Brown
Browse files

ASoC: fsl_sai: Specify the maxburst to 8 on i.MX93 platform 



There is a limit to eDMA AXI on i.MX93. Only TCD that has NBYTES in a
multiple of 8bytes can enable scatter-gather. NBYTES is calculated by
bus width times maxburst. On i.MX93 platform the value of maxburst is
specified to 8. It makes sure that NBYTES is a multiple of 8bytes.

Signed-off-by: default avatarChancel Liu <chancel.liu@nxp.com>
Acked-by: default avatarShengjiu Wang <shengjiu.wang@gmail.com>
Reviewed-by: default avatarDaniel Baluta <daniel.baluta@nxp.com>
Link: https://lore.kernel.org/r/20221027060311.2549711-4-chancel.liu@nxp.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 67d5c6c1

sound/soc/fsl/fsl_sai.c

+7 −4
Original line number Diff line number Diff line
@@ -872,10 +872,10 @@ static int fsl_sai_dai_probe(struct snd_soc_dai *cpu_dai) 


	regmap_update_bits(sai->regmap, FSL_SAI_TCR1(ofs),

			   FSL_SAI_CR1_RFW_MASK(sai->soc_data->fifo_depth),

			   sai->soc_data->fifo_depth - FSL_SAI_MAXBURST_TX);

			   sai->soc_data->fifo_depth - sai->dma_params_tx.maxburst);

	regmap_update_bits(sai->regmap, FSL_SAI_RCR1(ofs),

			   FSL_SAI_CR1_RFW_MASK(sai->soc_data->fifo_depth),

			   FSL_SAI_MAXBURST_RX - 1);

			   sai->dma_params_rx.maxburst - 1);



	snd_soc_dai_init_dma_data(cpu_dai, &sai->dma_params_tx,

				&sai->dma_params_rx);
@@ -1416,8 +1416,10 @@ static int fsl_sai_probe(struct platform_device *pdev) 


	sai->dma_params_rx.addr = sai->res->start + FSL_SAI_RDR0;

	sai->dma_params_tx.addr = sai->res->start + FSL_SAI_TDR0;

	sai->dma_params_rx.maxburst = FSL_SAI_MAXBURST_RX;

	sai->dma_params_tx.maxburst = FSL_SAI_MAXBURST_TX;

	sai->dma_params_rx.maxburst =

		sai->soc_data->max_burst[RX] ? sai->soc_data->max_burst[RX] : FSL_SAI_MAXBURST_RX;

	sai->dma_params_tx.maxburst =

		sai->soc_data->max_burst[TX] ? sai->soc_data->max_burst[TX] : FSL_SAI_MAXBURST_TX;



	sai->pinctrl = devm_pinctrl_get(&pdev->dev);
@@ -1588,6 +1590,7 @@ static const struct fsl_sai_soc_data fsl_sai_imx93_data = { 
	.pins = 4,

	.flags = 0,

	.max_register = FSL_SAI_MCTL,

	.max_burst = {8, 8},

};



static const struct of_device_id fsl_sai_ids[] = {

sound/soc/fsl/fsl_sai.h

+1 −0
Original line number Diff line number Diff line
@@ -235,6 +235,7 @@ struct fsl_sai_soc_data { 
	unsigned int reg_offset;

	unsigned int flags;

	unsigned int max_register;

	unsigned int max_burst[2];

};



/**