Currently only PCM streams can enlist hdac_stream for their data
transfer. Add cstream field to hdac_ext_stream to expose possibility of
compress stream assignment in place of PCM one.
Limited to HOST-type only.
Rather than copying entire hdac_ext_host_stream_assign, declare separate
PCM and compress wrappers and reuse it for both cases.
Signed-off-by: Cezary Rojewski <cezary.rojewski@xxxxxxxxx>
---
include/sound/hdaudio.h | 1 +
include/sound/hdaudio_ext.h | 2 ++
sound/hda/ext/hdac_ext_stream.c | 49 +++++++++++++++++++++++++++++----
3 files changed, 46 insertions(+), 6 deletions(-)
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index 541ca99b154b..91aabda56c96 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -484,6 +484,7 @@ 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
*/
diff --git a/include/sound/hdaudio_ext.h b/include/sound/hdaudio_ext.h
index ef88b20c7b0a..ec01f2024f0b 100644
--- a/include/sound/hdaudio_ext.h
+++ b/include/sound/hdaudio_ext.h
@@ -84,6 +84,8 @@ int snd_hdac_ext_stream_init_all(struct hdac_bus *bus, int start_idx,
int num_stream, int dir);
void snd_hdac_stream_free_all(struct hdac_bus *bus);
void snd_hdac_link_free_all(struct hdac_bus *bus);
+struct hdac_ext_stream *snd_hdac_ext_cstream_assign(struct hdac_bus *bus,
+ struct snd_compr_stream *cstream);
struct hdac_ext_stream *snd_hdac_ext_stream_assign(struct hdac_bus *bus,
struct snd_pcm_substream *substream,
int type);
diff --git a/sound/hda/ext/hdac_ext_stream.c b/sound/hda/ext/hdac_ext_stream.c
index c4d54a838773..014841a7f966 100644
--- a/sound/hda/ext/hdac_ext_stream.c
+++ b/sound/hda/ext/hdac_ext_stream.c
@@ -14,6 +14,7 @@
#include <sound/pcm.h>
#include <sound/hda_register.h>
#include <sound/hdaudio_ext.h>
+#include <sound/compress_driver.h>
/**
* snd_hdac_ext_stream_init - initialize each stream (aka device)
@@ -281,8 +282,7 @@ hdac_ext_link_stream_assign(struct hdac_bus *bus,
}
static struct hdac_ext_stream *
-hdac_ext_host_stream_assign(struct hdac_bus *bus,
- struct snd_pcm_substream *substream)
+hdac_ext_host_stream_assign(struct hdac_bus *bus, int direction)
{
struct hdac_ext_stream *res = NULL;
struct hdac_stream *stream = NULL;
@@ -296,12 +296,13 @@ hdac_ext_host_stream_assign(struct hdac_bus *bus,
struct hdac_ext_stream *hstream = container_of(stream,
struct hdac_ext_stream,
hstream);
- if (stream->direction != substream->stream)
+ if (stream->direction != direction)
continue;
if (!stream->opened) {
if (!hstream->decoupled)
- snd_hdac_ext_stream_decouple(bus, hstream, true);
+ snd_hdac_ext_stream_decouple(bus,
+ hstream, true);
res = hstream;
break;
}
@@ -310,13 +311,49 @@ hdac_ext_host_stream_assign(struct hdac_bus *bus,
spin_lock_irq(&bus->reg_lock);
res->hstream.opened = 1;
res->hstream.running = 0;
- res->hstream.substream = substream;
+ res->hstream.substream = NULL;
+ res->hstream.cstream = NULL;
spin_unlock_irq(&bus->reg_lock);
}
return res;
}
+static struct hdac_ext_stream *
+hdac_ext_host_stream_pcm_assign(struct hdac_bus *bus,
+ struct snd_pcm_substream *substream)
+{
+ struct hdac_ext_stream *res;
+
+ res = hdac_ext_host_stream_assign(bus, substream->stream);
+ if (res)
+ res->hstream.substream = substream;
+
+ return res;
+}
+
+/**
+ * snd_hdac_ext_cstream_assign - assign a host stream for compress
+ * @bus: HD-audio core bus
+ * @cstream: Compress stream to assign
+ *
+ * Assign an unused host stream for the given compress stream.
+ * If no stream is free, NULL is returned. Stream is decoupled
+ * before assignment.
+ */
+struct hdac_ext_stream *snd_hdac_ext_cstream_assign(struct hdac_bus *bus,
+ struct snd_compr_stream *cstream)
+{
+ struct hdac_ext_stream *res;
+
+ res = hdac_ext_host_stream_assign(bus, cstream->direction);
+ if (res)
+ res->hstream.cstream = cstream;
+
+ return res;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_ext_cstream_assign);
+
/**
* snd_hdac_ext_stream_assign - assign a stream for the PCM
* @bus: HD-audio core bus
@@ -350,7 +387,7 @@ struct hdac_ext_stream *snd_hdac_ext_stream_assign(struct hdac_bus *bus,
return hstream;
case HDAC_EXT_STREAM_TYPE_HOST:
- return hdac_ext_host_stream_assign(bus, substream);
+ return hdac_ext_host_stream_pcm_assign(bus, substream);
case HDAC_EXT_STREAM_TYPE_LINK:
return hdac_ext_link_stream_assign(bus, substream);
--
2.17.1
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