[PATCH v3 0/5] ASoC: fsl_asrc/fsl_easrc: expose per-pair/context DAIs and fix DMA race

From: Shengjiu Wang <[email protected]>

This series extends the i.MX ASRC and EASRC drivers to expose one DAI
per hardware conversion pair/context, allowing multiple independent
conversion paths to be active simultaneously.

Patches 1-2 update the DT bindings to add a ports container so each
conversion path can be wired independently in the audio graph.  The old
single port property is kept but marked deprecated.

Patch 3 moves dma_params into struct fsl_asrc_pair so each pair owns its
own copy, and registers it with the cpu DAI using per-direction setters in
fsl_asrc_dma_startup().  This removes the per-DAI probe callbacks from
fsl_asrc.c and fsl_easrc.c, which are no longer needed.

Patches 4-5 expose the individual DAIs: fsl_asrc registers three DAIs
(asrc-0/1/2) and fsl_easrc registers four (easrc-0/1/2/3).  The first
DAI in each driver retains the original generic stream names for
backward compatibility with existing machine drivers.

Changes since v2:
- add ports example to original example case in yaml file as port is
  deprecated 
- remove the label in example.

Changes since v1:
- Patch 3 is new: moves dma_params into struct fsl_asrc_pair (one per pair)
- Per-direction snd_soc_dai_dma_data_set_playback/capture used instead
  of snd_soc_dai_init_dma_data to avoid clearing the other direction
- dma_params_tx/rx removed from struct fsl_asrc; single dma_params per
  pair suffices because each pair is unidirectional
- per-DAI probe callbacks removed (startup now sets dma_data)
- Cover letter and commit messages updated to reflect the above
- DAI names changed: paira/pairb/pairc -> asrc-0/asrc-1/asrc-2,
  ctxa/ctxb/ctxc/ctxd -> easrc-0/easrc-1/easrc-2/easrc-3; use index-based
  naming consistent with port@N in the DT binding
- Stream names changed: ASRCB/ASRCC/ASRCD -> ASRC1/ASRC2/ASRC3; align with
  the index-based DAI names above
- Binding port descriptions updated: pair A/B/C -> conversion path 0/1/2;
  hardware-agnostic wording to match port@N numbering

Shengjiu Wang (5):
  ASoC: dt-bindings: fsl,imx-asrc: update port binding to support
    multiple paths
  ASoC: dt-bindings: fsl,easrc: add ports binding for multiple
    conversion paths
  ASoC: fsl_asrc/fsl_easrc: move DMA params into pair/context struct
  ASoC: fsl_asrc: expose individual DAIs per conversion path
  ASoC: fsl_easrc: expose individual DAIs per conversion path

 .../devicetree/bindings/sound/fsl,easrc.yaml  |  45 +++++++
 .../bindings/sound/fsl,imx-asrc.yaml          |  45 ++++++-
 sound/soc/fsl/fsl_asrc.c                      | 100 +++++++++-----
 sound/soc/fsl/fsl_asrc_common.h               |   7 +-
 sound/soc/fsl/fsl_asrc_dma.c                  |  14 ++
 sound/soc/fsl/fsl_easrc.c                     | 123 +++++++++++++-----
 6 files changed, 263 insertions(+), 71 deletions(-)

-- 
2.34.1