1 files changed, 11 insertions, 0 deletions

diff --git a/sound/soc/omap/omap-mcbsp.c b/sound/soc/omap/omap-mcbsp.c
index d6882be33452..9c09b94f0cf8 100644
--- a/sound/soc/omap/omap-mcbsp.c
+++ b/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);