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

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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: Chancel Liu <chancel.liu@nxp.com>
Acked-by: Shengjiu Wang <shengjiu.wang@gmail.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Link: https://lore.kernel.org/r/20221027060311.2549711-4-chancel.liu@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Chancel Liu 2022-10-27 14:03:11 +08:00 committed by Mark Brown
parent 67d5c6c199
commit 870b89d118
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 8 additions and 4 deletions
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11
sound/soc/fsl/fsl_sai.c
View File

@ -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[] = {

1
sound/soc/fsl/fsl_sai.h
View File

@ -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];
};
/**