This patchset adds support for Push/Pull mode modules.
Push-pull mode uses dedicated shared-memory modules that allow the DSP
to access the PCM circular buffer directly. In addition to reducing
fragment queueing and ACK handling in the host driver, 
This mode exposes a DSP-maintained position buffer that provides
fine-grained hardware pointer updates. Unlike the Read/Write Shared
Memory endpoitn modules, which are period based, where the reported
pointer advances only at period boundaries, where as push-pull mode
allows .pointer() to reflect sub-period progress, improving pointer
accuracy.
Also the driver now can queue buffers which are less than period size,
which makes tests like alsa_conformance_test happy.

Now the pointer update visibility is around 1ms, compared to min of
10ms with read/write shared memory endpoints.

Along with the circular buffer support, this patchset also adds
watermark event support to provide a period level event from dsp to
notify about period progress.

Tested this on T14s, Arduino VENTUNO-Q platforms.

Tplg related changes are available at: 
https://github.com/Srinivas-Kandagatla/audioreach-topology/tree/push/pull

thanks,
Srini

Srinivas Kandagatla (6):
  ASoC: qcom: audioreach: use cached shared memory module IID
  ASoC: qcom: q6apm: return error code to consumers on failures
  ASoC: qcom: q6apm: remove shared memory IID helpers
  ASoC: qcom: audioreach: Add support for shared memory push/pull
    modules
  ASoC: qcom: q6apm: add watermark event support
  ASoC: qcom: q6apm-dai: add push-pull and watermark event support

 sound/soc/qcom/qdsp6/audioreach.c |  79 ++++++++++-
 sound/soc/qcom/qdsp6/audioreach.h |  98 +++++++++++++
 sound/soc/qcom/qdsp6/q6apm-dai.c  | 144 +++++++++++++++----
 sound/soc/qcom/qdsp6/q6apm.c      | 222 ++++++++++++++++++++++--------
 sound/soc/qcom/qdsp6/q6apm.h      |  13 +-
 5 files changed, 467 insertions(+), 89 deletions(-)

-- 
2.47.3