C++ (Cpp) preallocate_idma_buffer示例

示例#1

文件： idma.c 项目： alianmohammad/gem5-linux-kernel

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

    ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
    if (ret)
        return ret;

    if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
        ret = preallocate_idma_buffer(pcm,
                                      SNDRV_PCM_STREAM_PLAYBACK);
    }

    return ret;
}

示例#2

文件： idma.c 项目： 1yankeedt/D710BST_FL24_Kernel

static int idma_new(struct snd_card *card,
	struct snd_soc_dai *dai, struct snd_pcm *pcm)
{
	int ret = 0;

	pr_debug("Entered %s\n", __func__);
	if (!card->dev->dma_mask)
		card->dev->dma_mask = &idma_mask;
	if (!card->dev->coherent_dma_mask)
		card->dev->coherent_dma_mask = DMA_BIT_MASK(32);

	if (dai->driver->playback.channels_min)
		ret = preallocate_idma_buffer(pcm,
				SNDRV_PCM_STREAM_PLAYBACK);

	return ret;
}

示例#3

文件： idma.c 项目： openube/android_kernel_sony_c2305

static int idma_new(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_card *card = rtd->card->snd_card;
	struct snd_pcm *pcm = rtd->pcm;
	int ret = 0;

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

	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
		ret = preallocate_idma_buffer(pcm,
				SNDRV_PCM_STREAM_PLAYBACK);
	}

	return ret;
}