ASoC: soc-pcm: Allow to specify unidirectional dai_link
Add 'playback_only' and 'capture_only' fields that can be used for specifying
that a dai_link has a unidirectional capability.
The motivation for this is for the cases of systems, such as Freescale MX28,
that has two unidirectional DAIs.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/include/sound/soc.h b/include/sound/soc.h
index c0ac3bc..65414e8 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -936,6 +936,10 @@
/* machine stream operations */
const struct snd_soc_ops *ops;
const struct snd_soc_compr_ops *compr_ops;
+
+ /* For unidirectional dai links */
+ bool playback_only;
+ bool capture_only;
};
struct snd_soc_codec_conf {
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index b6c6403..9abaa52 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -2027,6 +2027,16 @@
capture = 1;
}
+ if (rtd->dai_link->playback_only) {
+ playback = 1;
+ capture = 0;
+ }
+
+ if (rtd->dai_link->capture_only) {
+ playback = 0;
+ capture = 1;
+ }
+
/* create the PCM */
if (rtd->dai_link->no_pcm) {
snprintf(new_name, sizeof(new_name), "(%s)",