C++ (Cpp) pcm_preallocate_dma_buffer Examples

Example #1

File: msm7k-pcm.c Project: 98416/Z7Max_NX505J_H129_kernel

static int msm_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
	int ret;
	struct snd_card *card = rtd->card->snd_card;
	struct snd_pcm *pcm = rtd->pcm;

	if (!card->dev->coherent_dma_mask)
		card->dev->coherent_dma_mask = DMA_BIT_MASK(32);

	ret = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, 1);
	if (ret)
		return ret;
	ret = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, 1);
	if (ret)
		return ret;
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &msm_pcm_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &msm_pcm_ops);

	ret = pcm_preallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_PLAYBACK);
	if (ret)
		return ret;

	ret = pcm_preallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_CAPTURE);
	if (ret)
		msm_pcm_free_dma_buffers(pcm);
	return ret;
}

Example #2

File: msm7k-pcm.c Project: ARRESS1/kernel_samsung_europa

static int msm_pcm_new(struct snd_card *card,
			struct snd_soc_dai *codec_dai,
			struct snd_pcm *pcm)
{
	int ret;
	if (!card->dev->coherent_dma_mask)
		card->dev->coherent_dma_mask = DMA_32BIT_MASK;

	ret = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, 1);
	if (ret)
		return ret;
	ret = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, 1);
	if (ret)
		return ret;
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &msm_pcm_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &msm_pcm_ops);

	ret = pcm_preallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_PLAYBACK);
	if (ret)
		return ret;

	ret = pcm_preallocate_dma_buffer(pcm, SNDRV_PCM_STREAM_CAPTURE);
	if (ret)
		msm_pcm_free_dma_buffers(pcm);
	return ret;
}

Example #3

File: msm7k-pcm.c Project: mtuton/linux_u82x0

static int msm_pcm_new(struct snd_card *card,
			struct snd_soc_dai *codec_dai,
			struct snd_pcm *pcm)
{
	int ret;
	if (!card->dev->coherent_dma_mask)
		card->dev->coherent_dma_mask = DMA_32BIT_MASK;

	if (codec_dai->playback.channels_min) {
		ret = pcm_preallocate_dma_buffer(pcm,
			SNDRV_PCM_STREAM_PLAYBACK);
		if (ret)
			return ret;
	}

	if (codec_dai->capture.channels_min) {
		ret = pcm_preallocate_dma_buffer(pcm,
			SNDRV_PCM_STREAM_CAPTURE);
		if (ret)
			msm_pcm_free_dma_buffers(pcm);
	}
	return ret;
}