C++ (Cpp) snd_dmaengine_pcm_trigger示例

示例#1

文件： sunxi-daudiodma1.c 项目： GREYFOXRGR/BPI-M3-bsp

static int sunxi_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		switch (cmd) {
		case SNDRV_PCM_TRIGGER_START:
		case SNDRV_PCM_TRIGGER_RESUME:
		case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
			snd_dmaengine_pcm_trigger(substream, SNDRV_PCM_TRIGGER_START);
		return 0;
		case SNDRV_PCM_TRIGGER_SUSPEND:
		case SNDRV_PCM_TRIGGER_STOP:
		case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
			snd_dmaengine_pcm_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
		return 0;
		}
	} else {
		switch (cmd) {
		case SNDRV_PCM_TRIGGER_START:
		case SNDRV_PCM_TRIGGER_RESUME:
		case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
			snd_dmaengine_pcm_trigger(substream, SNDRV_PCM_TRIGGER_START);
		return 0;
		case SNDRV_PCM_TRIGGER_SUSPEND:
		case SNDRV_PCM_TRIGGER_STOP:
		case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
			snd_dmaengine_pcm_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
		return 0;
		}
	}
	return 0;
}

示例#2

文件： sunxi_spdma.c 项目： alex-deng/a33_linux

static int sunxi_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		return snd_dmaengine_pcm_trigger(substream, SNDRV_PCM_TRIGGER_START);
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		return snd_dmaengine_pcm_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
	default:
		return -EINVAL;
	}
}

示例#3

文件： tegra_pcm.c 项目： SuperPichu/shield-tablet-kernel

int tegra_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct tegra_pcm_dma_params * dmap;
	struct tegra_runtime_data *prtd;

	if (rtd->dai_link->no_pcm)
		return 0;

	dmap = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);


	prtd = (struct tegra_runtime_data *)
	snd_dmaengine_pcm_get_data(substream);

	if (!dmap)
		return 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		prtd->running = 1;
		if (prtd->disable_intr) {
			substream->runtime->dma_addr = prtd->avp_dma_addr;
			substream->runtime->no_period_wakeup = 1;
		} else {
			substream->runtime->no_period_wakeup = 0;
		}

		return snd_dmaengine_pcm_trigger(substream,
					SNDRV_PCM_TRIGGER_START);

	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		prtd->running = 0;

		return snd_dmaengine_pcm_trigger(substream,
					SNDRV_PCM_TRIGGER_STOP);
	default:
		return -EINVAL;
	}
	return 0;
}