[PATCH 15/15] ASoC: SOF: Intel: hda-dai: add support for dspless mode beyond HDAudio

[Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>]

From: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>

For SoundWire/ALH, we need to have a dai configured, but we don't want
to send a DMA_TLV to firmware. Add additional code branches.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
Reviewed-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
---
 sound/soc/sof/intel/hda-dai.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/sound/soc/sof/intel/hda-dai.c b/sound/soc/sof/intel/hda-dai.c
index 4bffd9ea21a9..c1682bcdb5a6 100644
--- a/sound/soc/sof/intel/hda-dai.c
+++ b/sound/soc/sof/intel/hda-dai.c
@@ -83,6 +83,11 @@ hda_dai_get_ops(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai
 
 	sdev = widget_to_sdev(w);
 
+	if (!swidget) {
+		dev_err(sdev->dev, "%s: swidget is NULL\n", __func__);
+		return NULL;
+	}
+
 	if (sdev->dspless_mode_selected)
 		return hda_select_dai_widget_ops(sdev, swidget);
 
@@ -364,8 +369,11 @@ static int non_hda_dai_hw_params(struct snd_pcm_substream *substream,
 		return ret;
 	}
 
-	/* get stream_id */
 	sdev = widget_to_sdev(w);
+	if (sdev->dspless_mode_selected)
+		goto skip_tlv;
+
+	/* get stream_id */
 	hext_stream = ops->get_hext_stream(sdev, cpu_dai, substream);
 
 	if (!hext_stream) {
@@ -398,6 +406,7 @@ static int non_hda_dai_hw_params(struct snd_pcm_substream *substream,
 	dma_config->dma_stream_channel_map.device_count = 0; /* mapping not used */
 	dma_config->dma_priv_config_size = 0;
 
+skip_tlv:
 	return 0;
 }
 
-- 
2.43.0