ASoC: SOF: Intel: Make sure that link and host DMA is coupled after use

Couple the Host and Link DMA when the stream is put.
When the hda_dsp_stream_hw_free() is called the Link DMA might be still
locked and we would leave the DMAs decoupled.

Signed-off-by: Peter Ujfalusi <[email protected]>

Author: ujfalusi

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

@@ -269,9 +269,8 @@ int hda_dsp_stream_put(struct snd_sof_dev *sdev, int direction, int stream_tag)
 {
 	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_ext_stream *hext_stream_match = NULL;
 	struct hdac_bus *bus = sof_to_bus(sdev);
-	struct sof_intel_hda_stream *hda_stream;
-	struct hdac_ext_stream *hext_stream;
 	struct hdac_stream *s;
 	bool dmi_l1_enable = true;
 	bool found = false;
@@ -283,20 +282,34 @@ int hda_dsp_stream_put(struct snd_sof_dev *sdev, int direction, int stream_tag)
 	 * that are DMI L1 incompatible.
 	 */
 	list_for_each_entry(s, &bus->stream_list, list) {
+		struct sof_intel_hda_stream *hda_stream;
+		struct hdac_ext_stream *hext_stream;
+
 		hext_stream = stream_to_hdac_ext_stream(s);
 		hda_stream = container_of(hext_stream, struct sof_intel_hda_stream, hext_stream);
 
 		if (!s->opened)
 			continue;
 
 		if (s->direction == direction && s->stream_tag == stream_tag) {
+			hext_stream_match = hext_stream;
 			s->opened = false;
 			found = true;
 		} else if (!(hda_stream->flags & SOF_HDA_STREAM_DMI_L1_COMPATIBLE)) {
 			dmi_l1_enable = false;
 		}
 	}
 
+	if (!sdev->dspless_mode_selected && hext_stream_match) {
+		/* couple host and link DMA if link DMA channel is idle */
+		if (!hext_stream_match->link_locked) {
+			u32 mask = BIT(hext_stream_match->hstream.index);
+
+			snd_sof_dsp_update_bits(sdev, HDA_DSP_PP_BAR,
+						SOF_HDA_REG_PP_PPCTL, mask, 0);
+		}
+	}
+
 	spin_unlock_irq(&bus->reg_lock);
 
 	/* Enable DMI L1 if permitted */