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-rw-r--r--sound/soc/omap/omap-mcbsp.c43
1 files changed, 4 insertions, 39 deletions
diff --git a/sound/soc/omap/omap-mcbsp.c b/sound/soc/omap/omap-mcbsp.c
index 9fd00b091814..86f213905e2c 100644
--- a/sound/soc/omap/omap-mcbsp.c
+++ b/sound/soc/omap/omap-mcbsp.c
@@ -202,31 +202,6 @@ static int omap_mcbsp_hwrule_min_buffersize(struct snd_pcm_hw_params *params,
return snd_interval_refine(buffer_size, &frames);
}
-static int omap_mcbsp_hwrule_max_periodsize(struct snd_pcm_hw_params *params,
- struct snd_pcm_hw_rule *rule)
-{
- struct snd_interval *period_size = hw_param_interval(params,
- SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
- struct snd_interval *channels = hw_param_interval(params,
- SNDRV_PCM_HW_PARAM_CHANNELS);
- struct snd_pcm_substream *substream = rule->private;
- 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);
- struct snd_interval frames;
- int size;
-
- snd_interval_any(&frames);
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- size = omap_mcbsp_get_max_tx_threshold(mcbsp_data->bus_id);
- else
- size = omap_mcbsp_get_max_rx_threshold(mcbsp_data->bus_id);
-
- frames.max = size / channels->min;
- frames.integer = 1;
- return snd_interval_refine(period_size, &frames);
-}
-
static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
@@ -255,10 +230,8 @@ static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
* 4 channels: size is 128 / 4 = 32 frames (4 * 32 words)
*/
if (cpu_is_omap343x()) {
- int dma_op_mode = omap_mcbsp_get_dma_op_mode(bus_id);
-
/*
- * The first rule is for the buffer size, we should not allow
+ * Rule for the buffer size. We should not allow
* smaller buffer than the FIFO size to avoid underruns
*/
snd_pcm_hw_rule_add(substream->runtime, 0,
@@ -267,17 +240,9 @@ static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
mcbsp_data,
SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
- /*
- * In case of threshold mode, the rule will ensure, that the
- * period size is not bigger than the maximum allowed threshold
- * value.
- */
- if (dma_op_mode == MCBSP_DMA_MODE_THRESHOLD)
- snd_pcm_hw_rule_add(substream->runtime, 0,
- SNDRV_PCM_HW_PARAM_CHANNELS,
- omap_mcbsp_hwrule_max_periodsize,
- substream,
- SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
+ /* Make sure, that the period size is always even */
+ snd_pcm_hw_constraint_step(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2);
}
return err;