Exemplos de samsung_dma_has_infiniteloop em C++ (Cpp)

Exemplo n.º 1

Arquivo: dma.c Projeto: poldo964/android_kernel_samsung_kminilte

static void audio_buffdone(void *data)
{
	struct snd_pcm_substream *substream = data;
	struct runtime_data *prtd;

	pr_debug("Entered %s\n", __func__);

	if (!substream)
		return;

	prtd = substream->runtime->private_data;

	if (prtd->state & ST_RUNNING) {
		snd_pcm_period_elapsed(substream);

		if (!samsung_dma_has_circular()) {
			spin_lock(&prtd->lock);

			prtd->dma_loaded--;
			if (!samsung_dma_has_infiniteloop())
				dma_enqueue(substream);

			spin_unlock(&prtd->lock);
		}
	}
}

Exemplo n.º 2

/* dma_enqueue
 *
 * place a dma buffer onto the queue for the dma system
 * to handle.
 */
static void dma_enqueue(struct snd_pcm_substream *substream)
{
	struct runtime_data *prtd = substream->runtime->private_data;
	dma_addr_t pos = prtd->dma_pos;
	unsigned int limit;
	struct samsung_dma_prep dma_info;

	pr_debug("Entered %s\n", __func__);

	limit = (prtd->dma_end - prtd->dma_start) / prtd->dma_period;

	pr_debug("%s: loaded %d, limit %d\n",
				__func__, prtd->dma_loaded, limit);

	dma_info.cap = (samsung_dma_has_circular() ? DMA_CYCLIC : DMA_SLAVE);
	dma_info.direction =
		(substream->stream == SNDRV_PCM_STREAM_PLAYBACK
		? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM);
	dma_info.fp = audio_buffdone;
	dma_info.fp_param = substream;
	dma_info.period = prtd->dma_period;
	dma_info.len = prtd->dma_period*limit;

	if (samsung_dma_has_infiniteloop()) {
		dma_info.buf = prtd->dma_pos;
		dma_info.infiniteloop = limit;
		prtd->params->ops->prepare(prtd->params->ch, &dma_info);
	} else {
		dma_info.infiniteloop = 0;
		while (prtd->dma_loaded < limit) {
			pr_debug("dma_loaded: %d\n", prtd->dma_loaded);

			if ((pos + dma_info.period) > prtd->dma_end) {
				dma_info.period  = prtd->dma_end - pos;
				pr_debug("%s: corrected dma len %ld\n",
						__func__, dma_info.period);
			}

			dma_info.buf = pos;
			prtd->params->ops->prepare(prtd->params->ch, &dma_info);

			prtd->dma_loaded++;
			pos += prtd->dma_period;
			if (pos >= prtd->dma_end)
				pos = prtd->dma_start;
		}
		prtd->dma_pos = pos;
	}
}