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authorLars-Peter Clausen <lars@metafoo.de>2013-11-30 17:38:58 +0100
committerMark Brown <broonie@linaro.org>2013-12-02 11:27:14 +0000
commit62e5f676f6a063e1ab0d6b8fcaef2feb026ee00e (patch)
tree16ac40c1babf3e1d18399fc0d35f8464f8a06e6b /sound
parentd3383420c969c25deffd33270ebe321e8401191a (diff)
downloadlinux-62e5f676f6a063e1ab0d6b8fcaef2feb026ee00e.tar.bz2
ASoC: Set SNDRV_PCM_INFO_JOINT_DUPLEX for PCMs with symmetry constraints
If there are symmetry constraints between the playback and the capture channel set the SNDRV_PCM_INFO_JOINT_DUPLEX flag to let userspace know about this. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/soc-pcm.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 170ff9695753..f3592f142832 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -180,6 +180,21 @@ static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
return 0;
}
+static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
+ struct snd_soc_dai_driver *codec_driver = rtd->codec_dai->driver;
+ struct snd_soc_dai_link *link = rtd->dai_link;
+
+ return cpu_driver->symmetric_rates || codec_driver->symmetric_rates ||
+ link->symmetric_rates || cpu_driver->symmetric_channels ||
+ codec_driver->symmetric_channels || link->symmetric_channels ||
+ cpu_driver->symmetric_samplebits ||
+ codec_driver->symmetric_samplebits ||
+ link->symmetric_samplebits;
+}
+
/*
* List of sample sizes that might go over the bus for parameter
* application. There ought to be a wildcard sample size for things
@@ -309,6 +324,9 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
&cpu_dai_drv->capture);
}
+ if (soc_pcm_has_symmetry(substream))
+ runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
+
ret = -EINVAL;
snd_pcm_limit_hw_rates(runtime);
if (!runtime->hw.rates) {