ASoC: Handle ignore_pmdown_time for CODEC to CODEC links

For CODEC to CODEC links we should only immediately power down if both CODECs
are configured to ignore the power down delay. Factor the logic for this
into a helper function that can be used for both compressed and normal PCMs.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

3 files changed, 28 insertions, 4 deletions

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 9a001472b96a..93c31c70b90a 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -413,6 +413,8 @@ struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
                 const char *dai_link);
 
+bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd);
+
 /* Utility functions to get clock rates from various things */
 int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots);
 int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params);
diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c
index 5e9690c85d8f..ef585af4081b 100644
--- a/sound/soc/soc-compress.c
+++ b/sound/soc/soc-compress.c
@@ -235,8 +235,7 @@ static int soc_compr_free(struct snd_compr_stream *cstream)
         cpu_dai->runtime = NULL;
 
         if (cstream->direction == SND_COMPRESS_PLAYBACK) {
-                if (!rtd->pmdown_time || codec->ignore_pmdown_time ||
-                    rtd->dai_link->ignore_pmdown_time) {
+                if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
                         snd_soc_dapm_stream_event(rtd,
                                         SNDRV_PCM_STREAM_PLAYBACK,
                                         SND_SOC_DAPM_STREAM_STOP);
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 47e1ce771e65..f098c8007cbe 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -35,6 +35,30 @@
 #define DPCM_MAX_BE_USERS       8
 
 /**
+ * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
+ * @rtd: The ASoC PCM runtime that should be checked.
+ *
+ * This function checks whether the power down delay should be ignored for a
+ * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
+ * been configured to ignore the delay, or if none of the components benefits
+ * from having the delay.
+ */
+bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
+{
+        bool ignore = true;
+
+        if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
+                return true;
+
+        if (rtd->cpu_dai->codec)
+                ignore &= rtd->cpu_dai->codec->ignore_pmdown_time;
+
+        ignore &= rtd->codec_dai->codec->ignore_pmdown_time;
+
+        return ignore;
+}
+
+/**
  * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
  * @substream: the pcm substream
  * @hw: the hardware parameters
@@ -496,8 +520,7 @@ static int soc_pcm_close(struct snd_pcm_substream *substream)
         cpu_dai->runtime = NULL;
 
         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
-                if (!rtd->pmdown_time || codec->ignore_pmdown_time ||
-                    rtd->dai_link->ignore_pmdown_time) {
+                if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
                         /* powered down playback stream now */
                         snd_soc_dapm_stream_event(rtd,
                                                   SNDRV_PCM_STREAM_PLAYBACK,