ASoC: soc-compress: Deduce stream direction

Previously we just hard coded all streams as playback streams, this
patch checks the DAI to see if it is a capture or playback stream. It is
worth noting that at this time only unidirectional streams are
supported.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 8 insertions, 1 deletions

diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c
index da83e5658f62..3853f7eb3f28 100644
--- a/sound/soc/soc-compress.c
+++ b/sound/soc/soc-compress.c
@@ -384,7 +384,14 @@ int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
         /* check client and interface hw capabilities */
         snprintf(new_name, sizeof(new_name), "%s %s-%d",
                         rtd->dai_link->stream_name, codec_dai->name, num);
-        direction = SND_COMPRESS_PLAYBACK;
+
+        if (codec_dai->driver->playback.channels_min)
+                direction = SND_COMPRESS_PLAYBACK;
+        else if (codec_dai->driver->capture.channels_min)
+                direction = SND_COMPRESS_CAPTURE;
+        else
+                return -EINVAL;
+
         compr = kzalloc(sizeof(*compr), GFP_KERNEL);
         if (compr == NULL) {
                 snd_printk(KERN_ERR "Cannot allocate compr\n");