---

yaml
---
r: 142694
b: refs/heads/master
c: 6984992
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7220b9f4bd4fad41f6f7299fe74c2c38ec85d793
+refs/heads/master: 6984992bf0520a07b931124d33f46b46437f6e1c

trunk/sound/soc/omap/omap-mcbsp.c

@@ -146,6 +146,17 @@ static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
 	struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 	int err = 0;
 
+	if (cpu_is_omap343x() && mcbsp_data->bus_id == 1) {
+		/*
+		 * 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 (!cpu_dai->active)
 		err = omap_mcbsp_request(mcbsp_data->bus_id);