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

@@ -275,6 +275,7 @@ int hda_dsp_stream_put(struct snd_sof_dev *sdev, int direction, int stream_tag)
 	struct hdac_stream *s;
 	bool dmi_l1_enable = true;
 	bool found = false;
+	u32 mask;
 
 	spin_lock_irq(&bus->reg_lock);
 
@@ -290,13 +291,21 @@ int hda_dsp_stream_put(struct snd_sof_dev *sdev, int direction, int stream_tag)
 			continue;
 
 		if (s->direction == direction && s->stream_tag == stream_tag) {
+			mask = BIT(hext_stream->hstream.index);
 			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 && found) {
+		/* couple host and link DMA if link DMA channel is idle */
+		if (!hext_stream->link_locked)
+			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 */