static snd_pcm_uframes_t sst_byt_pcm_pointer(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
struct sst_byt_priv_data *pdata =
snd_soc_platform_get_drvdata(rtd->platform);
struct sst_byt_pcm_data *pcm_data = snd_soc_pcm_get_drvdata(rtd);
struct sst_byt *byt = pdata->byt;
snd_pcm_uframes_t offset;
int pos;
pos = sst_byt_get_dsp_position(byt, pcm_data->stream,
snd_pcm_lib_buffer_bytes(substream));
offset = bytes_to_frames(runtime, pos);
dev_dbg(rtd->dev, "PCM: DMA pointer %zu bytes\n",
frames_to_bytes(runtime, (u32)offset));
return offset;
}
static u32 byt_notify_pointer(struct sst_byt_stream *stream, void *data)
{
struct sst_byt_pcm_data *pcm_data = data;
struct snd_pcm_substream *substream = pcm_data->substream;
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
struct sst_byt *byt = pdata->byt;
u32 pos, hw_pos;
hw_pos = sst_byt_get_dsp_position(byt, pcm_data->stream,
snd_pcm_lib_buffer_bytes(substream));
pcm_data->hw_ptr = hw_pos;
pos = frames_to_bytes(runtime,
(runtime->control->appl_ptr %
runtime->buffer_size));
dev_dbg(rtd->dev, "PCM: App/DMA pointer %u/%u bytes\n", pos, hw_pos);
snd_pcm_period_elapsed(substream);
return pos;
}
