From: Kuninori Morimoto kuninori.morimoto.gx@renesas.com
Current soc_pcm_pointer() is manually calculating both CPU-DAI's max delay (= A) and Codec-DAI's max delay (= B).
static snd_pcm_uframes_t soc_pcm_pointer(...) { ... ^ for_each_rtd_cpu_dais(rtd, i, cpu_dai) (A) cpu_delay = max(cpu_delay, ...); v delay += cpu_delay;
^ for_each_rtd_codec_dais(rtd, i, codec_dai) (B) codec_delay = max(codec_delay, ...); v delay += codec_delay;
runtime->delay = delay; ... }
Current soc_pcm_pointer() and the total delay calculating is not readable / difficult to understand.
This patch update snd_soc_dai_delay() to snd_soc_pcm_dai_delay(), and calcule both CPU/Codec delay in one function.
Link: https://lore.kernel.org/r/87fszl4yrq.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Kuninori Morimoto kuninori.morimoto.gx@renesas.com --- include/sound/soc-dai.h | 4 ++-- sound/soc/soc-dai.c | 40 ++++++++++++++++++++++++++++------------ sound/soc/soc-pcm.c | 18 ++---------------- 3 files changed, 32 insertions(+), 30 deletions(-)
diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h index 0dcb361a98bb..5d4dd7c5450b 100644 --- a/include/sound/soc-dai.h +++ b/include/sound/soc-dai.h @@ -208,8 +208,6 @@ int snd_soc_dai_startup(struct snd_soc_dai *dai, struct snd_pcm_substream *substream); void snd_soc_dai_shutdown(struct snd_soc_dai *dai, struct snd_pcm_substream *substream, int rollback); -snd_pcm_sframes_t snd_soc_dai_delay(struct snd_soc_dai *dai, - struct snd_pcm_substream *substream); void snd_soc_dai_suspend(struct snd_soc_dai *dai); void snd_soc_dai_resume(struct snd_soc_dai *dai); int snd_soc_dai_compress_new(struct snd_soc_dai *dai, @@ -238,6 +236,8 @@ int snd_soc_pcm_dai_trigger(struct snd_pcm_substream *substream, int cmd, int rollback); int snd_soc_pcm_dai_bespoke_trigger(struct snd_pcm_substream *substream, int cmd); +void snd_soc_pcm_dai_delay(struct snd_pcm_substream *substream, + snd_pcm_sframes_t *cpu_delay, snd_pcm_sframes_t *codec_delay);
int snd_soc_dai_compr_startup(struct snd_soc_dai *dai, struct snd_compr_stream *cstream); diff --git a/sound/soc/soc-dai.c b/sound/soc/soc-dai.c index 3db0fcf24385..6078afe335f8 100644 --- a/sound/soc/soc-dai.c +++ b/sound/soc/soc-dai.c @@ -453,18 +453,6 @@ void snd_soc_dai_shutdown(struct snd_soc_dai *dai, soc_dai_mark_pop(dai, substream, startup); }
-snd_pcm_sframes_t snd_soc_dai_delay(struct snd_soc_dai *dai, - struct snd_pcm_substream *substream) -{ - int delay = 0; - - if (dai->driver->ops && - dai->driver->ops->delay) - delay = dai->driver->ops->delay(substream, dai); - - return delay; -} - int snd_soc_dai_compress_new(struct snd_soc_dai *dai, struct snd_soc_pcm_runtime *rtd, int num) { @@ -693,6 +681,34 @@ int snd_soc_pcm_dai_bespoke_trigger(struct snd_pcm_substream *substream, return 0; }
+void snd_soc_pcm_dai_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_dai *dai; + int i; + + /* + * We're looking for the delay through the full audio path so it needs to + * be the maximum of the DAIs doing transmit and the maximum of the DAIs + * doing receive (ie, all CPUs and all CODECs) rather than just the maximum + * of all DAIs. + */ + + /* for CPU */ + for_each_rtd_cpu_dais(rtd, i, dai) + if (dai->driver->ops && + dai->driver->ops->delay) + *cpu_delay = max(*cpu_delay, dai->driver->ops->delay(substream, dai)); + + /* for Codec */ + for_each_rtd_codec_dais(rtd, i, dai) + if (dai->driver->ops && + dai->driver->ops->delay) + *codec_delay = max(*codec_delay, dai->driver->ops->delay(substream, dai)); +} + int snd_soc_dai_compr_startup(struct snd_soc_dai *dai, struct snd_compr_stream *cstream) { diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c index 4309e6131c40..b1ef4d02511f 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -1084,15 +1084,11 @@ static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) */ static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) { - struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); - struct snd_soc_dai *cpu_dai; - struct snd_soc_dai *codec_dai; struct snd_pcm_runtime *runtime = substream->runtime; snd_pcm_uframes_t offset = 0; snd_pcm_sframes_t delay = 0; snd_pcm_sframes_t codec_delay = 0; snd_pcm_sframes_t cpu_delay = 0; - int i;
/* clearing the previous total delay */ runtime->delay = 0; @@ -1102,19 +1098,9 @@ static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) /* base delay if assigned in pointer callback */ delay = runtime->delay;
- for_each_rtd_cpu_dais(rtd, i, cpu_dai) { - cpu_delay = max(cpu_delay, - snd_soc_dai_delay(cpu_dai, substream)); - } - delay += cpu_delay; - - for_each_rtd_codec_dais(rtd, i, codec_dai) { - codec_delay = max(codec_delay, - snd_soc_dai_delay(codec_dai, substream)); - } - delay += codec_delay; + snd_soc_pcm_dai_delay(substream, &cpu_delay, &codec_delay);
- runtime->delay = delay; + runtime->delay = delay + cpu_delay + codec_delay;
return offset; }