ASoC: fsl_xcvr: Add constraints of period size while using eDMA

eDMA on i.MX93 platform requires the period size to be multiple of
maxburst.
Signed-off-by: Chancel Liu <chancel.liu@nxp.com>
Acked-by: Shengjiu Wang <shengjiu.wang@gmail.com>
Link: https://lore.kernel.org/r/20230104023953.2973362-4-chancel.liu@nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_xcvr.c

@@ -22,6 +22,7 @@
 struct fsl_xcvr_soc_data {
 	const char *fw_name;
 	bool spdif_only;
+	bool use_edma;
 };
 
 struct fsl_xcvr {
@@ -538,6 +539,16 @@ static int fsl_xcvr_startup(struct snd_pcm_substream *substream,
 		return -EBUSY;
 	}
 
+	/*
+	 * EDMA controller needs period size to be a multiple of
+	 * tx/rx maxburst
+	 */
+	if (xcvr->soc_data->use_edma)
+		snd_pcm_hw_constraint_step(substream->runtime, 0,
+					   SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
+					   tx ? xcvr->dma_prms_tx.maxburst :
+					   xcvr->dma_prms_rx.maxburst);
+
 	switch (xcvr->mode) {
 	case FSL_XCVR_MODE_SPDIF:
 	case FSL_XCVR_MODE_ARC:
@@ -1207,6 +1218,7 @@ static const struct fsl_xcvr_soc_data fsl_xcvr_imx8mp_data = {
 
 static const struct fsl_xcvr_soc_data fsl_xcvr_imx93_data = {
 	.spdif_only = true,
+	.use_edma = true,
 };
 
 static const struct of_device_id fsl_xcvr_dt_ids[] = {