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authorJeeja KP <jeeja.kp@intel.com>2015-04-17 17:58:58 +0530
committerTakashi Iwai <tiwai@suse.de>2015-04-17 14:39:23 +0200
commit86f6501bf4c13e805e48497aaffab86ad7a98c44 (patch)
treebea57695e3d6666c99141bc86ae466a3044b5e4d /sound/hda
parentc1cc18b1ca01530a40ace0c9ec48124ff1340125 (diff)
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ALSA: hda - add generic functions to set hdac stream params
This will be used by hda controller driver to setup stream params in prepare. This function will setup the bdl and periods. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/hda')
-rw-r--r--sound/hda/hdac_stream.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/sound/hda/hdac_stream.c b/sound/hda/hdac_stream.c
index 9ffff6d9ba8e..1ba0462ef7ca 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);