ASoC: SOF: Intel: get a stream that both host and link DMAs are available

Add a flag to indicate we are looking for a stream that both host and
link DMAs are available. The stream will be used by the SoundWire BRA
and the same host and link DMA IDs will be used.

Signed-off-by: Bard Liao <[email protected]>

Author: bardliao

sound/soc/sof/intel/hda-loader.c

@@ -58,7 +58,7 @@ hda_cl_prepare(struct device *dev, unsigned int format, unsigned int size,
 	struct hdac_stream *hstream;
 	int ret;
 
-	hext_stream = hda_dsp_stream_get(sdev, direction, 0);
+	hext_stream = hda_dsp_stream_get(sdev, direction, 0, true);
 
 	if (!hext_stream) {
 		dev_err(sdev->dev, "error: no stream available\n");

sound/soc/sof/intel/hda-pcm.c

@@ -260,7 +260,7 @@ int hda_dsp_pcm_open(struct snd_sof_dev *sdev,
 	    spcm->stream[substream->stream].d0i3_compatible)
 		flags |= SOF_HDA_STREAM_DMI_L1_COMPATIBLE;
 
-	dsp_stream = hda_dsp_stream_get(sdev, direction, flags);
+	dsp_stream = hda_dsp_stream_get(sdev, direction, flags, false);
 	if (!dsp_stream) {
 		dev_err(sdev->dev, "error: no stream available\n");
 		return -ENODEV;

sound/soc/sof/intel/hda-probes.c

@@ -32,7 +32,7 @@ static int hda_probes_compr_startup(struct sof_client_dev *cdev,
 	struct snd_sof_dev *sdev = sof_client_dev_to_sof_dev(cdev);
 	struct hdac_ext_stream *hext_stream;
 
-	hext_stream = hda_dsp_stream_get(sdev, cstream->direction, 0);
+	hext_stream = hda_dsp_stream_get(sdev, cstream->direction, 0, false);
 	if (!hext_stream)
 		return -EBUSY;
 

sound/soc/sof/intel/hda-stream.c

@@ -211,7 +211,7 @@ int hda_dsp_stream_spib_config(struct snd_sof_dev *sdev,
 
 /* get next unused stream */
 struct hdac_ext_stream *
-hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags)
+hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags, bool same_host_link_dma)
 {
 	const struct sof_intel_dsp_desc *chip_info =  get_chip_info(sdev->pdata);
 	struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
@@ -233,6 +233,13 @@ hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags)
 			if (hda_stream->host_reserved)
 				continue;
 
+			/*
+			 * check if the link stream is available if the same host
+			 * and link dma is used
+			 */
+			if (same_host_link_dma && hext_stream->link_locked)
+				continue;
+
 			s->opened = true;
 			break;
 		}

sound/soc/sof/intel/hda-trace.c

@@ -43,7 +43,7 @@ int hda_dsp_trace_init(struct snd_sof_dev *sdev, struct snd_dma_buffer *dmab,
 	int ret;
 
 	hda->dtrace_stream = hda_dsp_stream_get(sdev, SNDRV_PCM_STREAM_CAPTURE,
-						SOF_HDA_STREAM_DMI_L1_COMPATIBLE);
+						SOF_HDA_STREAM_DMI_L1_COMPATIBLE, false);
 
 	if (!hda->dtrace_stream) {
 		dev_err(sdev->dev,

sound/soc/sof/intel/hda.h

@@ -693,7 +693,8 @@ u64 hda_dsp_get_stream_ldp(struct snd_sof_dev *sdev,
 			   struct snd_pcm_substream *substream);
 
 struct hdac_ext_stream *
-	hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags);
+	hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags,
+			   bool same_host_link_dma);
 int hda_dsp_stream_put(struct snd_sof_dev *sdev, int direction, int stream_tag);
 int hda_dsp_stream_spib_config(struct snd_sof_dev *sdev,
 			       struct hdac_ext_stream *hext_stream,