---

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		/* set DPATH RESET */
		ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL,
					 FSL_XCVR_EXT_CTRL_DPTH_RESET(tx),
					 FSL_XCVR_EXT_CTRL_DPTH_RESET(tx));
		if (ret < 0) {
			dev_err(dai->dev, "Failed to set DPATH RESET: %d\n", ret);
			goto release_lock;
		}

		if (tx) {
			switch (xcvr->mode) {
			case FSL_XCVR_MODE_EARC:
				/* set isr_cmdc_tx_en, w1c */
				ret = regmap_write(xcvr->regmap,
						   FSL_XCVR_ISR_SET,
						   FSL_XCVR_ISR_CMDC_TX_EN);
				if (ret < 0) {
					dev_err(dai->dev, "err updating isr %d\n", ret);
					goto release_lock;
				}
				fallthrough;
			case FSL_XCVR_MODE_SPDIF:
				ret = regmap_set_bits(xcvr->regmap,
						      FSL_XCVR_TX_DPTH_CTRL,
						      FSL_XCVR_TX_DPTH_CTRL_STRT_DATA_TX);
				if (ret < 0) {
					dev_err(dai->dev, "Failed to start DATA_TX: %d\n", ret);
					goto release_lock;
				}
				break;
			}
		}

		/* enable DMA RD/WR */
		ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL,
					 FSL_XCVR_EXT_CTRL_DMA_DIS(tx), 0);
		if (ret < 0) {
			dev_err(dai->dev, "Failed to enable DMA: %d\n", ret);
			goto release_lock;
		}

		ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_IER0,
					 FSL_XCVR_IRQ_EARC_ALL, FSL_XCVR_IRQ_EARC_ALL);
		if (ret < 0) {
			dev_err(dai->dev, "Error while setting IER0: %d\n", ret);
			goto release_lock;
		}

		/* clear DPATH RESET */
		ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL,FSL_XCVR_EXT_CTRL_DPTH_RESET(tx),0);
		if (ret < 0) {
			dev_err(dai->dev, "Failed to clear DPATH RESET: %d\n", ret);
			goto release_lock;
		}
		break;

тут же всё нормально написано, где что выходит до запуска?