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最新推荐文章于 2025-05-28 17:55:38 发布

原创最新推荐文章于 2025-05-28 17:55:38 发布 · 88 阅读

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#struct #function #playback #stream #cmd

static int omap_mcbsp_dai_trigger(struct snd_pcm_substream *substream, int cmd,
                struct snd_soc_dai *dai)
{
    struct snd_soc_pcm_runtime *rtd = substream->private_data;
    struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
    struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
    int err = 0, play = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
    printk("%s/n",__FUNCTION__);

    switch (cmd) {
    case SNDRV_PCM_TRIGGER_START:
    case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
    case SNDRV_PCM_TRIGGER_RESUME:
        omap_mcbsp_start(mcbsp_data->bus_id, play, !play);
        printk("SNDRV_PCM_TRIGGER_RESUME %s/n",__FUNCTION__);
        break;
    case SNDRV_PCM_TRIGGER_STOP:
    case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
    case SNDRV_PCM_TRIGGER_SUSPEND:
        omap_mcbsp_stop(mcbsp_data->bus_id, play, !play);
        printk("SNDRV_PCM_TRIGGER_SUSPEND %s/n",__FUNCTION__);
        break;
    default:
        err = -EINVAL;
    }

    return err;
}