soundwire: intel: remove .trigger operation

Now that the stream trigger is handled at the dai-link level, there is
no need for a dai-level trigger any longer.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200903204739.31206-4-yung-chuan.liao@linux.intel.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/soundwire/intel.c

@@ -997,43 +997,6 @@ static int intel_prepare(struct snd_pcm_substream *substream,
 	return ret;
 }
 
-static int intel_trigger(struct snd_pcm_substream *substream, int cmd,
-			 struct snd_soc_dai *dai)
-{
-	struct sdw_cdns_dma_data *dma;
-	int ret;
-
-	dma = snd_soc_dai_get_dma_data(dai, substream);
-	if (!dma) {
-		dev_err(dai->dev, "failed to get dma data in %s", __func__);
-		return -EIO;
-	}
-
-	switch (cmd) {
-	case SNDRV_PCM_TRIGGER_START:
-	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
-	case SNDRV_PCM_TRIGGER_RESUME:
-		ret = sdw_enable_stream(dma->stream);
-		break;
-
-	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
-	case SNDRV_PCM_TRIGGER_SUSPEND:
-	case SNDRV_PCM_TRIGGER_STOP:
-		ret = sdw_disable_stream(dma->stream);
-		break;
-
-	default:
-		ret = -EINVAL;
-		break;
-	}
-
-	if (ret)
-		dev_err(dai->dev,
-			"%s trigger %d failed: %d",
-			__func__, cmd, ret);
-	return ret;
-}
-
 static int
 intel_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
 {
@@ -1135,7 +1098,6 @@ static const struct snd_soc_dai_ops intel_pcm_dai_ops = {
 	.startup = intel_startup,
 	.hw_params = intel_hw_params,
 	.prepare = intel_prepare,
-	.trigger = intel_trigger,
 	.hw_free = intel_hw_free,
 	.shutdown = intel_shutdown,
 	.set_sdw_stream = intel_pcm_set_sdw_stream,
@@ -1146,7 +1108,6 @@ static const struct snd_soc_dai_ops intel_pdm_dai_ops = {
 	.startup = intel_startup,
 	.hw_params = intel_hw_params,
 	.prepare = intel_prepare,
-	.trigger = intel_trigger,
 	.hw_free = intel_hw_free,
 	.shutdown = intel_shutdown,
 	.set_sdw_stream = intel_pdm_set_sdw_stream,