[PATCH v5 3/9] ASoC: SOF: Intel: Account for compress streams when servicing IRQs

[Cezary Rojewski]

Update stream irq handler definition to correctly set hdac_stream
current position when servicing stream interrupts for compress streams.

Signed-off-by: Cezary Rojewski <cezary.rojewski at intel.com>
---

Changes in v5:
- Addressed u64/ u32 concerns from Pierre when calculating bytes
  transferred during runtime:
    div_u64_rem replaced by div64_u64_rem for
    hda_dsp_set_bytes_transferred and all local variables and
	hdac_stream::curr_pos are now of u64 type


 include/sound/hdaudio.h          |  2 ++
 sound/soc/sof/intel/hda-stream.c | 25 +++++++++++++++++++++++--
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index d4299e146d95..affedc2801c4 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -513,6 +513,7 @@ struct hdac_stream {
 	struct snd_pcm_substream *substream;	/* assigned substream,
 						 * set in PCM open
 						 */
+	struct snd_compr_stream *cstream;
 	unsigned int format_val;	/* format value to be set in the
 					 * controller and the codec
 					 */
@@ -527,6 +528,7 @@ struct hdac_stream {
 	bool locked:1;
 	bool stripe:1;			/* apply stripe control */
 
+	u64 curr_pos;
 	/* timestamp */
 	unsigned long start_wallclk;	/* start + minimum wallclk */
 	unsigned long period_wallclk;	/* wallclk for period */
diff --git a/sound/soc/sof/intel/hda-stream.c b/sound/soc/sof/intel/hda-stream.c
index c0ab9bb2a797..7daa913dbde0 100644
--- a/sound/soc/sof/intel/hda-stream.c
+++ b/sound/soc/sof/intel/hda-stream.c
@@ -571,6 +571,22 @@ bool hda_dsp_check_stream_irq(struct snd_sof_dev *sdev)
 	return ret;
 }
 
+static void
+hda_dsp_set_bytes_transferred(struct hdac_stream *hstream, u64 buffer_size)
+{
+	u64 prev_pos, pos, num_bytes;
+
+	div64_u64_rem(hstream->curr_pos, buffer_size, &prev_pos);
+	pos = snd_hdac_stream_get_pos_posbuf(hstream);
+
+	if (pos < prev_pos)
+		num_bytes = (buffer_size - prev_pos) +  pos;
+	else
+		num_bytes = pos - prev_pos;
+
+	hstream->curr_pos += num_bytes;
+}
+
 static bool hda_dsp_stream_check(struct hdac_bus *bus, u32 status)
 {
 	struct sof_intel_hda_dev *sof_hda = bus_to_sof_hda(bus);
@@ -588,14 +604,19 @@ static bool hda_dsp_stream_check(struct hdac_bus *bus, u32 status)
 			snd_hdac_stream_writeb(s, SD_STS, sd_status);
 
 			active = true;
-			if (!s->substream ||
+			if ((!s->substream && !s->cstream) ||
 			    !s->running ||
 			    (sd_status & SOF_HDA_CL_DMA_SD_INT_COMPLETE) == 0)
 				continue;
 
 			/* Inform ALSA only in case not do that with IPC */
-			if (sof_hda->no_ipc_position)
+			if (s->substream && sof_hda->no_ipc_position) {
 				snd_sof_pcm_period_elapsed(s->substream);
+			} else if (s->cstream) {
+				hda_dsp_set_bytes_transferred(s,
+					s->cstream->runtime->buffer_size);
+				snd_compr_fragment_elapsed(s->cstream);
+			}
 		}
 	}
 
-- 
2.17.1