diff options
Diffstat (limited to 'sound/soc/soc-component.c')
| -rw-r--r-- | sound/soc/soc-component.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sound/soc/soc-component.c b/sound/soc/soc-component.c index c76ff9c59dfb..e12f8244242b 100644 --- a/sound/soc/soc-component.c +++ b/sound/soc/soc-component.c @@ -932,6 +932,48 @@ int snd_soc_pcm_component_pointer(struct snd_pcm_substream *substream) return 0; } +static bool snd_soc_component_is_codec_on_rtd(struct snd_soc_pcm_runtime *rtd, + struct snd_soc_component *component) +{ + struct snd_soc_dai *dai; + int i; + + for_each_rtd_codec_dais(rtd, i, dai) { + if (dai->component == component) + return true; + } + + return false; +} + +void snd_soc_pcm_component_delay(struct snd_pcm_substream *substream, + snd_pcm_sframes_t *cpu_delay, + snd_pcm_sframes_t *codec_delay) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_soc_component *component; + snd_pcm_sframes_t delay; + int i; + + /* + * We're looking for the delay through the full audio path so it needs to + * be the maximum of the Components doing transmit and the maximum of the + * Components doing receive (ie, all CPUs and all CODECs) rather than + * just the maximum of all Components. + */ + for_each_rtd_components(rtd, i, component) { + if (!component->driver->delay) + continue; + + delay = component->driver->delay(component, substream); + + if (snd_soc_component_is_codec_on_rtd(rtd, component)) + *codec_delay = max(*codec_delay, delay); + else + *cpu_delay = max(*cpu_delay, delay); + } +} + int snd_soc_pcm_component_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg) { |