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-rw-r--r--include/sound/hdaudio.h2
-rw-r--r--sound/hda/hdac_stream.c38
2 files changed, 40 insertions, 0 deletions
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index d05931f..6a2e030 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -418,6 +418,8 @@ void snd_hdac_stream_release(struct hdac_stream *azx_dev);
int snd_hdac_stream_setup(struct hdac_stream *azx_dev);
void snd_hdac_stream_cleanup(struct hdac_stream *azx_dev);
int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev);
+int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
+ unsigned int format_val);
void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start);
void snd_hdac_stream_clear(struct hdac_stream *azx_dev);
void snd_hdac_stream_stop(struct hdac_stream *azx_dev);
diff --git a/sound/hda/hdac_stream.c b/sound/hda/hdac_stream.c
index 9ffff6d..1ba0462 100644
--- a/sound/hda/hdac_stream.c
+++ b/sound/hda/hdac_stream.c
@@ -394,6 +394,44 @@ int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev)
}
EXPORT_SYMBOL_GPL(snd_hdac_stream_setup_periods);
+/* snd_hdac_stream_set_params - set stream parameters
+ * @azx_dev: HD-audio core stream for which parameters are to be set
+ * @format_val: format value parameter
+ *
+ * Setup the HD-audio core stream parameters from substream of the stream
+ * and passed format value
+ */
+int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
+ unsigned int format_val)
+{
+
+ unsigned int bufsize, period_bytes;
+ struct snd_pcm_substream *substream = azx_dev->substream;
+ struct snd_pcm_runtime *runtime;
+ int err;
+
+ if (!substream)
+ return -EINVAL;
+ runtime = substream->runtime;
+ bufsize = snd_pcm_lib_buffer_bytes(substream);
+ period_bytes = snd_pcm_lib_period_bytes(substream);
+
+ if (bufsize != azx_dev->bufsize ||
+ period_bytes != azx_dev->period_bytes ||
+ format_val != azx_dev->format_val ||
+ runtime->no_period_wakeup != azx_dev->no_period_wakeup) {
+ azx_dev->bufsize = bufsize;
+ azx_dev->period_bytes = period_bytes;
+ azx_dev->format_val = format_val;
+ azx_dev->no_period_wakeup = runtime->no_period_wakeup;
+ err = snd_hdac_stream_setup_periods(azx_dev);
+ if (err < 0)
+ return err;
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_stream_set_params);
+
static cycle_t azx_cc_read(const struct cyclecounter *cc)
{
struct hdac_stream *azx_dev = container_of(cc, struct hdac_stream, cc);
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