ASoC: SOF: Intel: add hda_dsp_stream_pair_get/put helpers

Currently, hda_dsp_stream_get/put are used to get/put the host dma.
However, we may want to use a hda stream that both host and link dma are
available. Add helper to find the hda stream and reserve/release it.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>

Author: bardliao

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

@@ -210,8 +210,8 @@ 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)
+static struct hdac_ext_stream *
+_hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags, bool pair)
 {
 	const struct sof_intel_dsp_desc *chip_info =  get_chip_info(sdev->pdata);
 	struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
@@ -233,7 +233,14 @@ hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags)
 			if (hda_stream->host_reserved)
 				continue;
 
+			if (pair && hext_stream->link_locked)
+				continue;
+
 			s->opened = true;
+
+			if (pair)
+				hext_stream->link_locked = true;
+
 			break;
 		}
 	}
@@ -264,14 +271,27 @@ hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags)
 	return hext_stream;
 }
 
+struct hdac_ext_stream *
+hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags)
+{
+	return _hda_dsp_stream_get(sdev, direction, flags, false);
+}
+
+struct hdac_ext_stream *
+hda_dsp_stream_pair_get(struct snd_sof_dev *sdev, int direction, u32 flags)
+{
+	return _hda_dsp_stream_get(sdev, direction, flags, true);
+}
+
 /* free a stream */
-int hda_dsp_stream_put(struct snd_sof_dev *sdev, int direction, int stream_tag)
+static int _hda_dsp_stream_put(struct snd_sof_dev *sdev, int direction, int stream_tag, bool pair)
 {
 	const struct sof_intel_dsp_desc *chip_info =  get_chip_info(sdev->pdata);
 	struct sof_intel_hda_dev *hda = sdev->pdata->hw_pdata;
 	struct hdac_bus *bus = sof_to_bus(sdev);
 	struct sof_intel_hda_stream *hda_stream;
 	struct hdac_ext_stream *hext_stream;
+	struct hdac_ext_stream *link_stream;
 	struct hdac_stream *s;
 	bool dmi_l1_enable = true;
 	bool found = false;
@@ -292,6 +312,8 @@ int hda_dsp_stream_put(struct snd_sof_dev *sdev, int direction, int stream_tag)
 		if (s->direction == direction && s->stream_tag == stream_tag) {
 			s->opened = false;
 			found = true;
+			if (pair)
+				link_stream = hext_stream;
 		} else if (!(hda_stream->flags & SOF_HDA_STREAM_DMI_L1_COMPATIBLE)) {
 			dmi_l1_enable = false;
 		}
@@ -312,9 +334,22 @@ int hda_dsp_stream_put(struct snd_sof_dev *sdev, int direction, int stream_tag)
 		return -ENODEV;
 	}
 
+	if (pair)
+		snd_hdac_ext_stream_release(link_stream, HDAC_EXT_STREAM_TYPE_LINK);
+
 	return 0;
 }
 
+int hda_dsp_stream_put(struct snd_sof_dev *sdev, int direction, int stream_tag)
+{
+	return _hda_dsp_stream_put(sdev, direction, stream_tag, false);
+}
+
+int hda_dsp_stream_pair_put(struct snd_sof_dev *sdev, int direction, int stream_tag)
+{
+	return _hda_dsp_stream_put(sdev, direction, stream_tag, true);
+}
+
 static int hda_dsp_stream_reset(struct snd_sof_dev *sdev, struct hdac_stream *hstream)
 {
 	int sd_offset = SOF_STREAM_SD_OFFSET(hstream);

sound/soc/sof/intel/hda.h

@@ -694,7 +694,10 @@ u64 hda_dsp_get_stream_ldp(struct snd_sof_dev *sdev,
 
 struct hdac_ext_stream *
 	hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags);
+struct hdac_ext_stream *
+	hda_dsp_stream_pair_get(struct snd_sof_dev *sdev, int direction, u32 flags);
 int hda_dsp_stream_put(struct snd_sof_dev *sdev, int direction, int stream_tag);
+int hda_dsp_stream_pair_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,
 			       int enable, u32 size);