[alsa-devel] [PATCHv4 20/20] ASoC: OMAP: Use DMA operating mode of McBSP

[Eduardo Valentin]

From: Eduardo Valentin <eduardo.valentin at nokia.com>

Signed-off-by: Eduardo Valentin <eduardo.valentin at nokia.com>
---
 sound/soc/omap/omap-mcbsp.c |   18 +++++++++++++++---
 1 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/sound/soc/omap/omap-mcbsp.c b/sound/soc/omap/omap-mcbsp.c
index 2aec7a6..60c360b 100644
--- a/sound/soc/omap/omap-mcbsp.c
+++ b/sound/soc/omap/omap-mcbsp.c
@@ -144,7 +144,14 @@ 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 samples = snd_pcm_lib_period_bytes(substream) >> 1;
+	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)
@@ -166,6 +173,7 @@ static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
 		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;
 
 		/*
@@ -187,7 +195,8 @@ static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
 		max_period++;
 		max_period <<= 1;
 
-		snd_pcm_hw_constraint_minmax(substream->runtime,
+		if (dma_op_mode == MCBSP_DMA_MODE_THRESHOLD)
+			snd_pcm_hw_constraint_minmax(substream->runtime,
 						SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
 						32, max_period);
 	}
@@ -268,7 +277,10 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
 		port = omap34xx_mcbsp_port[bus_id][substream->stream];
 		omap_mcbsp_dai_dma_params[id][substream->stream].set_threshold =
 						omap_mcbsp_set_threshold;
-		sync_mode = OMAP_DMA_SYNC_FRAME;
+		/* 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;
 	}
-- 
1.6.2.GIT

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