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    Subject[PATCH v4 1/6] ASoC: soc-component: Add snd_soc_pcm_component_ack
    Date
    Add snd_soc_pcm_component_ack back, which can be used to get an
    updated buffer pointer in the platform driver.
    On Asymmetric multiprocessor, this pointer can be sent to Cortex-M
    core for audio processing.

    Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
    ---
    include/sound/soc-component.h | 3 +++
    sound/soc/soc-component.c | 14 ++++++++++++++
    sound/soc/soc-pcm.c | 2 ++
    3 files changed, 19 insertions(+)

    diff --git a/include/sound/soc-component.h b/include/sound/soc-component.h
    index 7dc75b39287f..722cfab28d29 100644
    --- a/include/sound/soc-component.h
    +++ b/include/sound/soc-component.h
    @@ -146,6 +146,8 @@ struct snd_soc_component_driver {
    int (*mmap)(struct snd_soc_component *component,
    struct snd_pcm_substream *substream,
    struct vm_area_struct *vma);
    + int (*ack)(struct snd_soc_component *component,
    + struct snd_pcm_substream *substream);

    const struct snd_compress_ops *compress_ops;

    @@ -498,5 +500,6 @@ int snd_soc_pcm_component_pm_runtime_get(struct snd_soc_pcm_runtime *rtd,
    void *stream);
    void snd_soc_pcm_component_pm_runtime_put(struct snd_soc_pcm_runtime *rtd,
    void *stream, int rollback);
    +int snd_soc_pcm_component_ack(struct snd_pcm_substream *substream);

    #endif /* __SOC_COMPONENT_H */
    diff --git a/sound/soc/soc-component.c b/sound/soc/soc-component.c
    index 8415e9bd2932..3a5e84e16a87 100644
    --- a/sound/soc/soc-component.c
    +++ b/sound/soc/soc-component.c
    @@ -1212,3 +1212,17 @@ void snd_soc_pcm_component_pm_runtime_put(struct snd_soc_pcm_runtime *rtd,
    soc_component_mark_pop(component, stream, pm);
    }
    }
    +
    +int snd_soc_pcm_component_ack(struct snd_pcm_substream *substream)
    +{
    + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
    + struct snd_soc_component *component;
    + int i;
    +
    + /* FIXME: use 1st pointer */
    + for_each_rtd_components(rtd, i, component)
    + if (component->driver->ack)
    + return component->driver->ack(component, substream);
    +
    + return 0;
    +}
    diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
    index ba8ffbf8a5d3..e75b404a9f36 100644
    --- a/sound/soc/soc-pcm.c
    +++ b/sound/soc/soc-pcm.c
    @@ -2826,6 +2826,8 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
    rtd->ops.page = snd_soc_pcm_component_page;
    if (drv->mmap)
    rtd->ops.mmap = snd_soc_pcm_component_mmap;
    + if (drv->ack)
    + rtd->ops.ack = snd_soc_pcm_component_ack;
    }

    if (playback)
    --
    2.27.0
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