hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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>
This commit is contained in:
Lars-Peter Clausen 2013-11-30 17:38:58 +01:00 committed by Mark Brown
parent d3383420c9
commit 62e5f676f6
1 changed files with 18 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
sound/soc/soc-pcm.c
View File

@ -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) {