[PATCH v5 0/5] ASoC: q6apm: fix under runs and fragment sizes

srinivas.kandagatla
2025-03-14T17:48:33Z

From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

On Qualcomm Audioreach setup, some of the audio artifacts are seen in
both recording and playback. These patches fix issues by
1. Adjusting the fragment size that dsp can service.
2. schedule available playback buffers in time for dsp to not hit under runs
3. remove some of the manual calculations done to get hardware pointer.

With these patches, am able to see significant Audio quality improvements.
I have few more patches to optimize the dsp drivers, but for now am
keeping this series simple to address the underruns and overruns issues
noticed in pipewire setup.

Any testing would be appreciated.

Please note that on pipewire min-latency has to be set to 512 which
reflects the DSP latency requirements of 10ms. You might see audio
artifacts like glitches if you try to play audio below 256 latency.

thanks,
Srini

Change since v4:
- added tested-by tags, including cc: stable
- removed a line delete.

Changes since v3:
- updated period size aligment patch with 10ms period size
contstriants.

Changes since v2:
- dropped patch which is causing regression with pluseaudio.
- setup period sizes only for capture path
- fix underruns/overruns in dsp pipelines.
- add fixes tag
- add patch to fix buffer alignment

Changes since v1:
- added new patches to fix the fragment size, pointer
calculations
- updated to schedule only available buffers.

Srinivas Kandagatla (5):
ASoC: q6apm-dai: schedule all available frames to avoid dsp under-runs
ASoC: q6apm: add q6apm_get_hw_pointer helper
ASoC: q6apm-dai: make use of q6apm_get_hw_pointer
ASoC: qdsp6: q6apm-dai: set 10 ms period and buffer alignment.
ASoC: qdsp6: q6apm-dai: fix capture pipeline overruns.

sound/soc/qcom/qdsp6/q6apm-dai.c | 60 +++++++++++++++++---------------
sound/soc/qcom/qdsp6/q6apm.c | 18 +++++++++-
sound/soc/qcom/qdsp6/q6apm.h | 3 ++
3 files changed, 52 insertions(+), 29 deletions(-)

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2.39.5