Merge commit 'v2.6.33-rc5' into secretlab/test-devicetree

1 files changed, 25 insertions, 98 deletions

diff --git a/sound/soc/fsl/mpc5200_dma.c b/sound/soc/fsl/mpc5200_dma.c
index 6096d22283e..30ed568afb2 100644
--- a/sound/soc/fsl/mpc5200_dma.c
+++ b/sound/soc/fsl/mpc5200_dma.c
@@ -58,47 +58,15 @@ static void psc_dma_bcom_enqueue_next_buffer(struct psc_dma_stream *s)
 	/* Prepare and enqueue the next buffer descriptor */
 	bd = bcom_prepare_next_buffer(s->bcom_task);
 	bd->status = s->period_bytes;
-	bd->data[0] = s->period_next_pt;
+	bd->data[0] = s->runtime->dma_addr + (s->period_next * s->period_bytes);
 	bcom_submit_next_buffer(s->bcom_task, NULL);
 
 	/* Update for next period */
-	s->period_next_pt += s->period_bytes;
-	if (s->period_next_pt >= s->period_end)
-		s->period_next_pt = s->period_start;
-}
-
-static void psc_dma_bcom_enqueue_tx(struct psc_dma_stream *s)
-{
-	if (s->appl_ptr > s->runtime->control->appl_ptr) {
-		/*
-		 * In this case s->runtime->control->appl_ptr has wrapped around.
-		 * Play the data to the end of the boundary, then wrap our own
-		 * appl_ptr back around.
-		 */
-		while (s->appl_ptr < s->runtime->boundary) {
-			if (bcom_queue_full(s->bcom_task))
-				return;
-
-			s->appl_ptr += s->period_size;
-
-			psc_dma_bcom_enqueue_next_buffer(s);
-		}
-		s->appl_ptr -= s->runtime->boundary;
-	}
-
-	while (s->appl_ptr < s->runtime->control->appl_ptr) {
-
-		if (bcom_queue_full(s->bcom_task))
-			return;
-
-		s->appl_ptr += s->period_size;
-
-		psc_dma_bcom_enqueue_next_buffer(s);
-	}
+	s->period_next = (s->period_next + 1) % s->runtime->periods;
 }
 
 /* Bestcomm DMA irq handler */
-static irqreturn_t psc_dma_bcom_irq_tx(int irq, void *_psc_dma_stream)
+static irqreturn_t psc_dma_bcom_irq(int irq, void *_psc_dma_stream)
 {
 	struct psc_dma_stream *s = _psc_dma_stream;
 
@@ -108,34 +76,8 @@ static irqreturn_t psc_dma_bcom_irq_tx(int irq, void *_psc_dma_stream)
 	while (bcom_buffer_done(s->bcom_task)) {
 		bcom_retrieve_buffer(s->bcom_task, NULL, NULL);
 
-		s->period_current_pt += s->period_bytes;
-		if (s->period_current_pt >= s->period_end)
-			s->period_current_pt = s->period_start;
-	}
-	psc_dma_bcom_enqueue_tx(s);
-	spin_unlock(&s->psc_dma->lock);
-
-	/* If the stream is active, then also inform the PCM middle layer
-	 * of the period finished event. */
-	if (s->active)
-		snd_pcm_period_elapsed(s->stream);
-
-	return IRQ_HANDLED;
-}
-
-static irqreturn_t psc_dma_bcom_irq_rx(int irq, void *_psc_dma_stream)
-{
-	struct psc_dma_stream *s = _psc_dma_stream;
-
-	spin_lock(&s->psc_dma->lock);
-	/* For each finished period, dequeue the completed period buffer
-	 * and enqueue a new one in it's place. */
-	while (bcom_buffer_done(s->bcom_task)) {
-		bcom_retrieve_buffer(s->bcom_task, NULL, NULL);
-
-		s->period_current_pt += s->period_bytes;
-		if (s->period_current_pt >= s->period_end)
-			s->period_current_pt = s->period_start;
+		s->period_current = (s->period_current+1) % s->runtime->periods;
+		s->period_count++;
 
 		psc_dma_bcom_enqueue_next_buffer(s);
 	}
@@ -166,54 +108,38 @@ static int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd)
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct psc_dma *psc_dma = rtd->dai->cpu_dai->private_data;
 	struct snd_pcm_runtime *runtime = substream->runtime;
-	struct psc_dma_stream *s;
+	struct psc_dma_stream *s = to_psc_dma_stream(substream, psc_dma);
 	struct mpc52xx_psc __iomem *regs = psc_dma->psc_regs;
 	u16 imr;
 	unsigned long flags;
 	int i;
 
-	if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
-		s = &psc_dma->capture;
-	else
-		s = &psc_dma->playback;
-
-	dev_dbg(psc_dma->dev, "psc_dma_trigger(substream=%p, cmd=%i)"
-		" stream_id=%i\n",
-		substream, cmd, substream->pstr->stream);
-
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
+		dev_dbg(psc_dma->dev, "START: stream=%i fbits=%u ps=%u #p=%u\n",
+			substream->pstr->stream, runtime->frame_bits,
+			(int)runtime->period_size, runtime->periods);
 		s->period_bytes = frames_to_bytes(runtime,
 						  runtime->period_size);
-		s->period_start = virt_to_phys(runtime->dma_area);
-		s->period_end = s->period_start +
-				(s->period_bytes * runtime->periods);
-		s->period_next_pt = s->period_start;
-		s->period_current_pt = s->period_start;
-		s->period_size = runtime->period_size;
+		s->period_next = 0;
+		s->period_current = 0;
 		s->active = 1;
-
-		/* track appl_ptr so that we have a better chance of detecting
-		 * end of stream and not over running it.
-		 */
+		s->period_count = 0;
 		s->runtime = runtime;
-		s->appl_ptr = s->runtime->control->appl_ptr -
-				(runtime->period_size * runtime->periods);
 
 		/* Fill up the bestcomm bd queue and enable DMA.
 		 * This will begin filling the PSC's fifo.
 		 */
 		spin_lock_irqsave(&psc_dma->lock, flags);
 
-		if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE) {
+		if (substream->pstr->stream == SNDRV_PCM_STREAM_CAPTURE)
 			bcom_gen_bd_rx_reset(s->bcom_task);
-			for (i = 0; i < runtime->periods; i++)
-				if (!bcom_queue_full(s->bcom_task))
-					psc_dma_bcom_enqueue_next_buffer(s);
-		} else {
+		else
 			bcom_gen_bd_tx_reset(s->bcom_task);
-			psc_dma_bcom_enqueue_tx(s);
-		}
+
+		for (i = 0; i < runtime->periods; i++)
+			if (!bcom_queue_full(s->bcom_task))
+				psc_dma_bcom_enqueue_next_buffer(s);
 
 		bcom_enable(s->bcom_task);
 		spin_unlock_irqrestore(&psc_dma->lock, flags);
@@ -223,6 +149,8 @@ static int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd)
 		break;
 
 	case SNDRV_PCM_TRIGGER_STOP:
+		dev_dbg(psc_dma->dev, "STOP: stream=%i periods_count=%i\n",
+			substream->pstr->stream, s->period_count);
 		s->active = 0;
 
 		spin_lock_irqsave(&psc_dma->lock, flags);
@@ -236,7 +164,8 @@ static int psc_dma_trigger(struct snd_pcm_substream *substream, int cmd)
 		break;
 
 	default:
-		dev_dbg(psc_dma->dev, "invalid command\n");
+		dev_dbg(psc_dma->dev, "unhandled trigger: stream=%i cmd=%i\n",
+			substream->pstr->stream, cmd);
 		return -EINVAL;
 	}
 
@@ -343,7 +272,7 @@ psc_dma_pointer(struct snd_pcm_substream *substream)
 	else
 		s = &psc_dma->playback;
 
-	count = s->period_current_pt - s->period_start;
+	count = s->period_current * s->period_bytes;
 
 	return bytes_to_frames(substream->runtime, count);
 }
@@ -532,11 +461,9 @@ int mpc5200_audio_dma_create(struct of_device *op)
 
 	rc = request_irq(psc_dma->irq, &psc_dma_status_irq, IRQF_SHARED,
 			 "psc-dma-status", psc_dma);
-	rc |= request_irq(psc_dma->capture.irq,
-			  &psc_dma_bcom_irq_rx, IRQF_SHARED,
+	rc |= request_irq(psc_dma->capture.irq, &psc_dma_bcom_irq, IRQF_SHARED,
 			  "psc-dma-capture", &psc_dma->capture);
-	rc |= request_irq(psc_dma->playback.irq,
-			  &psc_dma_bcom_irq_tx, IRQF_SHARED,
+	rc |= request_irq(psc_dma->playback.irq, &psc_dma_bcom_irq, IRQF_SHARED,
 			  "psc-dma-playback", &psc_dma->playback);
 	if (rc) {
 		ret = -ENODEV;