1 files changed, 68 insertions, 9 deletions

diff --git a/sound/soc/omap/omap-mcbsp.c b/sound/soc/omap/omap-mcbsp.c
index 6a837ffd5d0..f5387d962f5 100644
--- a/sound/soc/omap/omap-mcbsp.c
+++ b/sound/soc/omap/omap-mcbsp.c
@@ -139,27 +139,67 @@ static const unsigned long omap34xx_mcbsp_port[][2] = {
 static const unsigned long omap34xx_mcbsp_port[][2] = {};
 #endif
 
+static void omap_mcbsp_set_threshold(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+	struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
+	int dma_op_mode = omap_mcbsp_get_dma_op_mode(mcbsp_data->bus_id);
+	int samples;
+
+	/* TODO: Currently, MODE_ELEMENT == MODE_FRAME */
+	if (dma_op_mode == MCBSP_DMA_MODE_THRESHOLD)
+		samples = snd_pcm_lib_period_bytes(substream) >> 1;
+	else
+		samples = 1;
+
+	/* Configure McBSP internal buffer usage */
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		omap_mcbsp_set_tx_threshold(mcbsp_data->bus_id, samples - 1);
+	else
+		omap_mcbsp_set_rx_threshold(mcbsp_data->bus_id, samples - 1);
+}
+
 static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
 				  struct snd_soc_dai *dai)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 	struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
+	int bus_id = mcbsp_data->bus_id;
 	int err = 0;
 
-	if (cpu_is_omap343x() && mcbsp_data->bus_id == 1) {
+	if (!cpu_dai->active)
+		err = omap_mcbsp_request(bus_id);
+
+	if (cpu_is_omap343x()) {
+		int dma_op_mode = omap_mcbsp_get_dma_op_mode(bus_id);
+		int max_period;
+
 		/*
 		 * McBSP2 in OMAP3 has 1024 * 32-bit internal audio buffer.
 		 * Set constraint for minimum buffer size to the same than FIFO
 		 * size in order to avoid underruns in playback startup because
 		 * HW is keeping the DMA request active until FIFO is filled.
 		 */
-		snd_pcm_hw_constraint_minmax(substream->runtime,
-			SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 4096, UINT_MAX);
-	}
+		if (bus_id == 1)
+			snd_pcm_hw_constraint_minmax(substream->runtime,
+					SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
+					4096, UINT_MAX);
 
-	if (!cpu_dai->active)
-		err = omap_mcbsp_request(mcbsp_data->bus_id);
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			max_period = omap_mcbsp_get_max_tx_threshold(bus_id);
+		else
+			max_period = omap_mcbsp_get_max_rx_threshold(bus_id);
+
+		max_period++;
+		max_period <<= 1;
+
+		if (dma_op_mode == MCBSP_DMA_MODE_THRESHOLD)
+			snd_pcm_hw_constraint_minmax(substream->runtime,
+						SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
+						32, max_period);
+	}
 
 	return err;
 }
@@ -191,6 +231,11 @@ static int omap_mcbsp_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		mcbsp_data->active++;
 		omap_mcbsp_start(mcbsp_data->bus_id, play, !play);
+		/* Make sure data transfer is frame synchronized */
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			omap_mcbsp_xmit_enable(mcbsp_data->bus_id, 1);
+		else
+			omap_mcbsp_recv_enable(mcbsp_data->bus_id, 1);
 		break;
 
 	case SNDRV_PCM_TRIGGER_STOP:
@@ -215,7 +260,7 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
 	struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 	struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 	int dma, bus_id = mcbsp_data->bus_id, id = cpu_dai->id;
-	int wlen, channels, wpf;
+	int wlen, channels, wpf, sync_mode = OMAP_DMA_SYNC_ELEMENT;
 	unsigned long port;
 	unsigned int format;
 
@@ -231,6 +276,12 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
 	} else if (cpu_is_omap343x()) {
 		dma = omap24xx_dma_reqs[bus_id][substream->stream];
 		port = omap34xx_mcbsp_port[bus_id][substream->stream];
+		omap_mcbsp_dai_dma_params[id][substream->stream].set_threshold =
+						omap_mcbsp_set_threshold;
+		/* TODO: Currently, MODE_ELEMENT == MODE_FRAME */
+		if (omap_mcbsp_get_dma_op_mode(bus_id) ==
+						MCBSP_DMA_MODE_THRESHOLD)
+			sync_mode = OMAP_DMA_SYNC_FRAME;
 	} else {
 		return -ENODEV;
 	}
@@ -238,6 +289,7 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
 		substream->stream ? "Audio Capture" : "Audio Playback";
 	omap_mcbsp_dai_dma_params[id][substream->stream].dma_req = dma;
 	omap_mcbsp_dai_dma_params[id][substream->stream].port_addr = port;
+	omap_mcbsp_dai_dma_params[id][substream->stream].sync_mode = sync_mode;
 	cpu_dai->dma_data = &omap_mcbsp_dai_dma_params[id][substream->stream];
 
 	if (mcbsp_data->configured) {
@@ -321,8 +373,11 @@ static int omap_mcbsp_dai_set_dai_fmt(struct snd_soc_dai *cpu_dai,
 	/* Generic McBSP register settings */
 	regs->spcr2	|= XINTM(3) | FREE;
 	regs->spcr1	|= RINTM(3);
-	regs->rcr2	|= RFIG;
-	regs->xcr2	|= XFIG;
+	/* RFIG and XFIG are not defined in 34xx */
+	if (!cpu_is_omap34xx()) {
+		regs->rcr2	|= RFIG;
+		regs->xcr2	|= XFIG;
+	}
 	if (cpu_is_omap2430() || cpu_is_omap34xx()) {
 		regs->xccr = DXENDLY(1) | XDMAEN;
 		regs->rccr = RFULL_CYCLE | RDMAEN;
@@ -333,11 +388,15 @@ static int omap_mcbsp_dai_set_dai_fmt(struct snd_soc_dai *cpu_dai,
 		/* 1-bit data delay */
 		regs->rcr2	|= RDATDLY(1);
 		regs->xcr2	|= XDATDLY(1);
+		regs->rccr	|= RFULL_CYCLE | RDMAEN | RDISABLE;
+		regs->xccr	|= (DXENDLY(1) | XDMAEN | XDISABLE);
 		break;
 	case SND_SOC_DAIFMT_DSP_A:
 		/* 1-bit data delay */
 		regs->rcr2      |= RDATDLY(1);
 		regs->xcr2      |= XDATDLY(1);
+		regs->rccr	|= RFULL_CYCLE | RDMAEN | RDISABLE;
+		regs->xccr	|= (DXENDLY(1) | XDMAEN | XDISABLE);
 		/* Invert FS polarity configuration */
 		temp_fmt ^= SND_SOC_DAIFMT_NB_IF;
 		break;