ASoC: audio-graph: Fixup CPU endpoint hw_params in a BE<->BE link

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>
Link: https://lore.kernel.org/r/1631551342-25469-4-git-send-email-spujar@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/generic/audio-graph-card.c b/sound/soc/generic/audio-graph-card.c
index 546f6fd0609e131e4da9210f0e78d265c2ed6e45..7eb027238327839c99bf0ffc82e76adadaaff74f 100644 (file)
--- a/sound/soc/generic/audio-graph-card.c
+++ b/sound/soc/generic/audio-graph-card.c
@@ -310,8 +310,10 @@ 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);
                asoc_simple_canonicalize_platform(platforms, cpus);