[alsa-devel] [PATCH 3/7] ALSA: hda: Interrupt servicing and BDL setup for compress streams

[Cezary Rojewski]

Account for compress streams when receiving and servicing buffer
completed interrupts. In case of compress stream enlisting hdac_stream
for data transfer, setup BDL entries much like it is the case for PCM
streams.

Signed-off-by: Cezary Rojewski <cezary.rojewski at intel.com>
Signed-off-by: Divya Prakash <divya1.prakash at intel.com>
---
 sound/hda/hdac_controller.c |  4 ++--
 sound/hda/hdac_stream.c     | 26 ++++++++++++++++++++------
 2 files changed, 22 insertions(+), 8 deletions(-)

diff --git a/sound/hda/hdac_controller.c b/sound/hda/hdac_controller.c
index 7e7be8e4dcf9..585908f58028 100644
--- a/sound/hda/hdac_controller.c
+++ b/sound/hda/hdac_controller.c
@@ -553,8 +553,8 @@ int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
 			sd_status = snd_hdac_stream_readb(azx_dev, SD_STS);
 			snd_hdac_stream_writeb(azx_dev, SD_STS, SD_INT_MASK);
 			handled |= 1 << azx_dev->index;
-			if (!azx_dev->substream || !azx_dev->running ||
-			    !(sd_status & SD_INT_COMPLETE))
+			if ((!azx_dev->substream && !azx_dev->cstream) ||
+			    !azx_dev->running || !(sd_status & SD_INT_COMPLETE))
 				continue;
 			if (ack)
 				ack(bus, azx_dev);
diff --git a/sound/hda/hdac_stream.c b/sound/hda/hdac_stream.c
index d00c81e34cde..bf6795d73bcd 100644
--- a/sound/hda/hdac_stream.c
+++ b/sound/hda/hdac_stream.c
@@ -7,6 +7,7 @@
 #include <linux/delay.h>
 #include <linux/export.h>
 #include <linux/clocksource.h>
+#include <sound/compress_driver.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/hdaudio.h>
@@ -410,14 +411,20 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
 {
 	struct hdac_bus *bus = azx_dev->bus;
 	struct snd_pcm_substream *substream = azx_dev->substream;
+	struct snd_compr_stream *cstream = azx_dev->cstream;
 	struct snd_pcm_runtime *runtime;
 	struct snd_dma_buffer *dmab;
 	__le32 *bdl;
 	int i, ofs, periods, period_bytes;
 	int pos_adj, pos_align;
 
-	runtime = substream->runtime;
-	dmab = snd_pcm_get_dma_buf(substream);
+	if (substream) {
+		runtime = substream->runtime;
+		dmab = snd_pcm_get_dma_buf(substream);
+	} else {
+		runtime = NULL;
+		dmab = snd_pcm_get_dma_buf(cstream);
+	}
 
 	/* reset BDL address */
 	snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0);
@@ -486,15 +493,22 @@ int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
 				 unsigned int format_val)
 {
 	struct snd_pcm_substream *substream = azx_dev->substream;
+	struct snd_compr_stream *cstream = azx_dev->cstream;
 	unsigned int bufsize, period_bytes;
 	unsigned int no_period_wakeup;
 	int err;
 
-	if (!substream)
+	if (substream) {
+		bufsize = snd_pcm_lib_buffer_bytes(substream);
+		period_bytes = snd_pcm_lib_period_bytes(substream);
+		no_period_wakeup = substream->runtime->no_period_wakeup;
+	} else if (cstream) {
+		bufsize = cstream->runtime->buffer_size;
+		period_bytes = cstream->runtime->fragment_size;
+		no_period_wakeup = 0;
+	} else {
 		return -EINVAL;
-	bufsize = snd_pcm_lib_buffer_bytes(substream);
-	period_bytes = snd_pcm_lib_period_bytes(substream);
-	no_period_wakeup = substream->runtime->no_period_wakeup;
+	}
 
 	if (bufsize != azx_dev->bufsize ||
 	    period_bytes != azx_dev->period_bytes ||
-- 
2.17.1