[PATCH 03/13] ASoC: audio-graph: Fixup CPU endpoint hw_params in a BE<->BE link

Sameer Pujar
2021-08-27T09:38:34Z

When multiple components are connected back to back in an audio path,
hw_param fixup may be required for CPU or Codec endpoint of BE<->BE
DAI links. Currently fixup support is available for Codec and this
commit adds similar feature for CPU endpoint of a BE<->BE link.

For example a resampler component can be plugged into an audio path.
[ FE -> BE1 -> ... -> resampler -> ... BEn ]

The resampler DAI links can be:
BEx (CPU) -> resampler input (Codec)
resampler output (CPU) -> BEy (Codec)

Thus input and output sample rate parameters for resampler can be
fixed up as per the resample requirement.

Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
sound/soc/generic/audio-graph-card.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c
index 5e71382..7439122 100644
--- a/sound/soc/generic/audio-graph-card.c
+++ b/sound/soc/generic/audio-graph-card.c
@@ -309,8 +309,10 @@ static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv,
* For example: FE <-> BE1 <-> BE2 <-> ... <-> BEn where
* there are 'n' BE components in the path.
*/
- if (card->component_chaining && !soc_component_is_pcm(cpus))
+ if (card->component_chaining && !soc_component_is_pcm(cpus)) {
dai_link->no_pcm = 1;
+ dai_link->be_hw_params_fixup = asoc_simple_be_hw_params_fixup;
+ }

asoc_simple_canonicalize_cpu(cpus, is_single_links);
} else {
--
2.7.4