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authorPiotr Stankiewicz <piotrs@opensource.wolfsonmicro.com>2016-05-13 19:03:56 +0300
committerMark Brown <broonie@kernel.org>2016-05-30 18:15:10 +0300
commit5fdd022c20264791310b188ec4a080bcb8647d23 (patch)
tree0733590c59a9731fb84571e78bd382ad20257003 /sound/soc/soc-pcm.c
parent6742064aef7f1fba8e68d30b2e726918a5d66790 (diff)
downloadlinux-5fdd022c20264791310b188ec4a080bcb8647d23.tar.xz
ASoC: dpcm: play nice with CODEC<->CODEC links
Currently in situations where a normal CODEC to CODEC link follows a DPCM DAI, an error in the following form will be logged: ASoC: can't get [playback|capture] BE for <widget name> ASoC: no BE found for <widget name> This happens because all widgets in a path containing a DPCM DAI will be passed to dpcm_add_paths, which will try to interpret the CODEC<->CODEC as if it were a DPCM DAI, in turn causing the error. This patch aims to resolve the described issue by stopping the DPCM graph walk, initiated from dpcm_path_get, at the first widget associated with a DPCM BE. Signed-off-by: Piotr Stankiewicz <piotrs@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/soc-pcm.c')
-rw-r--r--sound/soc/soc-pcm.c42
1 files changed, 41 insertions, 1 deletions
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index c2b0aa82f3f1..60d702f8b9f0 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -1287,6 +1287,46 @@ static int widget_in_list(struct snd_soc_dapm_widget_list *list,
return 0;
}
+static bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
+ enum snd_soc_dapm_direction dir)
+{
+ struct snd_soc_card *card = widget->dapm->card;
+ struct snd_soc_pcm_runtime *rtd;
+ int i;
+
+ if (dir == SND_SOC_DAPM_DIR_OUT) {
+ list_for_each_entry(rtd, &card->rtd_list, list) {
+ if (!rtd->dai_link->no_pcm)
+ continue;
+
+ if (rtd->cpu_dai->playback_widget == widget)
+ return true;
+
+ for (i = 0; i < rtd->num_codecs; ++i) {
+ struct snd_soc_dai *dai = rtd->codec_dais[i];
+ if (dai->playback_widget == widget)
+ return true;
+ }
+ }
+ } else { /* SND_SOC_DAPM_DIR_IN */
+ list_for_each_entry(rtd, &card->rtd_list, list) {
+ if (!rtd->dai_link->no_pcm)
+ continue;
+
+ if (rtd->cpu_dai->capture_widget == widget)
+ return true;
+
+ for (i = 0; i < rtd->num_codecs; ++i) {
+ struct snd_soc_dai *dai = rtd->codec_dais[i];
+ if (dai->capture_widget == widget)
+ return true;
+ }
+ }
+ }
+
+ return false;
+}
+
int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
int stream, struct snd_soc_dapm_widget_list **list)
{
@@ -1295,7 +1335,7 @@ int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
/* get number of valid DAI paths and their widgets */
paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
- NULL);
+ dpcm_end_walk_at_be);
dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
stream ? "capture" : "playback");