From 258020d0882e89c1462800a70eb414b8a4fec78c Mon Sep 17 00:00:00 2001 From: Peter Ujfalusi Date: Wed, 3 Mar 2010 15:08:07 +0200 Subject: [PATCH] ASoC: core: Add delay operation to snd_soc_dai_ops The delay callback can be used by the core to query the delay on the dai caused by FIFO or delay in the platform side. In case if both CPU and CODEC dai has FIFO the delay reported by each will be added to form the full delay on the chain. If none of the dai has FIFO, than the delay will be kept as zero. Signed-off-by: Peter Ujfalusi Acked-by: Liam Girdwood Signed-off-by: Mark Brown --- include/sound/soc-dai.h | 6 ++++++ include/sound/soc.h | 7 +++++++ sound/soc/soc-core.c | 18 ++++++++++++++++++ 3 files changed, 31 insertions(+) diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h index 20de0bcaa137..6cf76a41501e 100644 --- a/include/sound/soc-dai.h +++ b/include/sound/soc-dai.h @@ -182,6 +182,12 @@ struct snd_soc_dai_ops { struct snd_soc_dai *); int (*trigger)(struct snd_pcm_substream *, int, struct snd_soc_dai *); + /* + * For hardware based FIFO caused delay reporting. + * Optional. + */ + snd_pcm_sframes_t (*delay)(struct snd_pcm_substream *, + struct snd_soc_dai *); }; /* diff --git a/include/sound/soc.h b/include/sound/soc.h index f792c1881b0a..dbfec16015de 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -470,6 +470,13 @@ struct snd_soc_platform { struct snd_pcm *); void (*pcm_free)(struct snd_pcm *); + /* + * For platform caused delay reporting. + * Optional. + */ + snd_pcm_sframes_t (*delay)(struct snd_pcm_substream *, + struct snd_soc_dai *); + /* platform stream ops */ struct snd_pcm_ops *pcm_ops; }; diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index feb572c616cd..4011ad3dc57a 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -802,6 +802,8 @@ static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) /* * soc level wrapper for pointer callback + * If cpu_dai, codec_dai, platform driver has the delay callback, than + * the runtime->delay will be updated accordingly. */ static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) { @@ -809,11 +811,27 @@ static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) struct snd_soc_device *socdev = rtd->socdev; struct snd_soc_card *card = socdev->card; struct snd_soc_platform *platform = card->platform; + struct snd_soc_dai_link *machine = rtd->dai; + struct snd_soc_dai *cpu_dai = machine->cpu_dai; + struct snd_soc_dai *codec_dai = machine->codec_dai; + struct snd_pcm_runtime *runtime = substream->runtime; snd_pcm_uframes_t offset = 0; + snd_pcm_sframes_t delay = 0; if (platform->pcm_ops->pointer) offset = platform->pcm_ops->pointer(substream); + if (cpu_dai->ops->delay) + delay += cpu_dai->ops->delay(substream, cpu_dai); + + if (codec_dai->ops->delay) + delay += codec_dai->ops->delay(substream, codec_dai); + + if (platform->delay) + delay += platform->delay(substream, codec_dai); + + runtime->delay = delay; + return offset; } -- 2.30.2