On Thu, Oct 27, 2022 at 2:04 PM Chancel Liu chancel.liu@nxp.com wrote:
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
best regards wang shengjiu
sound/soc/fsl/fsl_sai.c | 11 +++++++---- sound/soc/fsl/fsl_sai.h | 1 + 2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c index 68e1cc4c369a..a0ea27f06997 100644 --- a/sound/soc/fsl/fsl_sai.c +++ b/sound/soc/fsl/fsl_sai.c @@ -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[] = { diff --git a/sound/soc/fsl/fsl_sai.h b/sound/soc/fsl/fsl_sai.h index 697f6690068c..197748a888d5 100644 --- a/sound/soc/fsl/fsl_sai.h +++ b/sound/soc/fsl/fsl_sai.h @@ -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];};
/**
2.25.1