1 files changed, 9 insertions, 1 deletions

diff --git a/sound/soc/davinci/davinci-pcm.c b/sound/soc/davinci/davinci-pcm.c
index a05996588489..091dacb78b4d 100644
--- a/sound/soc/davinci/davinci-pcm.c
+++ b/sound/soc/davinci/davinci-pcm.c
@@ -67,6 +67,7 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
         dma_addr_t src, dst;
         unsigned short src_bidx, dst_bidx;
         unsigned int data_type;
+        unsigned short acnt;
         unsigned int count;
 
         period_size = snd_pcm_lib_period_bytes(substream);
@@ -91,11 +92,12 @@ static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
                 dst_bidx = data_type;
         }
 
+        acnt = prtd->params->acnt;
         edma_set_src(lch, src, INCR, W8BIT);
         edma_set_dest(lch, dst, INCR, W8BIT);
         edma_set_src_index(lch, src_bidx, 0);
         edma_set_dest_index(lch, dst_bidx, 0);
-        edma_set_transfer_params(lch, data_type, count, 1, 0, ASYNC);
+        edma_set_transfer_params(lch, acnt, count, 1, 0, ASYNC);
 
         prtd->period++;
         if (unlikely(prtd->period >= runtime->periods))
@@ -206,6 +208,7 @@ static int davinci_pcm_prepare(struct snd_pcm_substream *substream)
         /* Copy self-linked parameter RAM entry into master channel */
         edma_read_slot(prtd->slave_lch, &temp);
         edma_write_slot(prtd->master_lch, &temp);
+        davinci_pcm_enqueue_dma(substream);
 
         return 0;
 }
@@ -243,6 +246,11 @@ static int davinci_pcm_open(struct snd_pcm_substream *substream)
         int ret = 0;
 
         snd_soc_set_runtime_hwparams(substream, &davinci_pcm_hardware);
+        /* ensure that buffer size is a multiple of period size */
+        ret = snd_pcm_hw_constraint_integer(runtime,
+                                                SNDRV_PCM_HW_PARAM_PERIODS);
+        if (ret < 0)
+                return ret;
 
         prtd = kzalloc(sizeof(struct davinci_runtime_data), GFP_KERNEL);
         if (prtd == NULL)