[PATCH v2 4/9] ASoC: soc-pcm: Get all BEs along DAPM path

From: Sameer Pujar
Date: Wed Aug 05 2020 - 01:25:14 EST


dpcm_end_walk_at_be() stops the graph walk when first BE is found for
the given FE component. In a component model we may want to connect
multiple DAIs from different components. A new flag is introduced in
'snd_soc_card', which when set allows DAI/component chaining. Later
PCM operations can be called for all these listed components for a
valid DAPM path.

Signed-off-by: Sameer Pujar <spujar@xxxxxxxxxx>
---
include/sound/soc.h | 1 +
sound/soc/soc-pcm.c | 3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 5e3919f..e8531be 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1084,6 +1084,7 @@ struct snd_soc_card {
unsigned int fully_routed:1;
unsigned int disable_route_checks:1;
unsigned int probed:1;
+ unsigned int component_chaining:1;

void *drvdata;
};
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 00ac1cb..5f1d8d3 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -1323,7 +1323,8 @@ 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,
- dpcm_end_walk_at_be);
+ fe->card->component_chaining ?
+ NULL : dpcm_end_walk_at_be);

dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
stream ? "capture" : "playback");
--
2.7.4