ASoC: SOF: ipc4: Fix pipeline state transitions for aggregate DAIs#5765
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ujfalusi wants to merge 1 commit into
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ASoC: SOF: ipc4: Fix pipeline state transitions for aggregate DAIs#5765ujfalusi wants to merge 1 commit into
ujfalusi wants to merge 1 commit into
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ujfalusi
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Pull request overview
This PR fixes IPC4 pipeline state transitions for aggregate back-end links (num_cpus > 1) where multiple CPU DAIs may share the same SOF pipeline, which can currently cause premature RUNNING transitions and redundant PAUSED IPCs.
Changes:
- Add a per-pipeline
trigger_countto gate START/PAUSE_RELEASE so RUNNING is sent only after all DAIs sharing a pipeline have completed link DMA triggering. - Deduplicate STOP/SUSPEND/PAUSE_PUSH PAUSED IPCs for shared pipelines by checking the current pipeline state.
- Compute the “DAIs-per-pipeline” threshold dynamically per BE link to support shared/independent/mixed aggregate topologies.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| sound/soc/sof/sof-audio.h | Adds trigger_count to struct snd_sof_pipeline to track aggregate trigger completion per pipeline. |
| sound/soc/sof/intel/hda-dai-ops.c | Adds per-pipeline DAI counting and uses trigger_count to gate RUNNING/PAUSED IPC transitions for aggregate DAIs. |
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| if (!w) | ||
| continue; | ||
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| sw = w->dobj.private; |
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| int spipe_dais = hda_ipc4_count_spipe_dais(substream, | ||
| swidget->spipe); | ||
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| swidget->spipe->trigger_count++; | ||
| swidget->spipe->started_count++; | ||
| if (swidget->spipe->trigger_count < spipe_dais) | ||
| break; |
kv2019i
previously approved these changes
May 12, 2026
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kv2019i
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kv2019i
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Please check the copilot comment on defensive programming. Otherwise complex, but looks good to me.
| if (!w) | ||
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For aggregate DAIs (num_cpus > 1) the pre_trigger/post_trigger callbacks send pipeline state IPCs per-DAI without considering that multiple DAIs may share the same pipeline. This causes premature state transitions where the pipeline goes RUNNING before all link DMAs have started, or individual DAIs send redundant IPCs for shared pipelines. Add a per-pipeline trigger_count to gate state transitions: - START/PAUSE_RELEASE: defer RUNNING IPC until all DAIs sharing the same pipeline have completed their link DMA operations - STOP/SUSPEND/PAUSE_PUSH: use pipeline state dedup so the PAUSED IPC is sent once regardless of how many DAIs share the pipeline The per-spipe DAI count is computed dynamically to handle all aggregate topologies: shared pipelines, independent pipelines, and mixed cases. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
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For aggregate DAIs (num_cpus > 1) the pre_trigger/post_trigger callbacks send pipeline state IPCs per-DAI without considering that multiple DAIs may share the same pipeline. This causes premature state transitions where the pipeline goes RUNNING before all link DMAs have started, or individual DAIs send redundant IPCs for shared pipelines.
Add a per-pipeline trigger_count to gate state transitions:
The per-spipe DAI count is computed dynamically to handle all aggregate topologies: shared pipelines, independent pipelines, and mixed cases.