[PATCH 1/2] ASoC: SOF: Intel: reset spib_addr before disabling SPIB

[Bard Liao <yung-chuan.liao@linux.intel.com>]

The spib_addr register will indicate to the host DMA where the position
is in the buffer currently processed by host SW. The register is ignored
by the host DMA if SPIB is disabled. Reset it to 0 before disabling SPIB.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
---
 sound/soc/sof/intel/hda-stream.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/sound/soc/sof/intel/hda-stream.c b/sound/soc/sof/intel/hda-stream.c
index 5c1f3b427cdb..4a46e35c3eac 100644
--- a/sound/soc/sof/intel/hda-stream.c
+++ b/sound/soc/sof/intel/hda-stream.c
@@ -198,13 +198,18 @@ int hda_dsp_stream_spib_config(struct snd_sof_dev *sdev,
 
 	mask = (1 << hstream->index);
 
+	/* Reset the spib_addr before disabling SPIB */
+	if (!enable)
+		sof_io_write(sdev, hstream->spib_addr, 0);
+
 	/* enable/disable SPIB for the stream */
 	snd_sof_dsp_update_bits(sdev, HDA_DSP_SPIB_BAR,
 				SOF_HDA_ADSP_REG_CL_SPBFIFO_SPBFCCTL, mask,
 				enable << hstream->index);
 
 	/* set the SPIB value */
-	sof_io_write(sdev, hstream->spib_addr, size);
+	if (enable)
+		sof_io_write(sdev, hstream->spib_addr, size);
 
 	return 0;
 }
-- 
2.43.0