diff options
| author | Sumit Bhattacharya <sumitb@nvidia.com> | 2011-12-07 20:20:43 +0530 |
|---|---|---|
| committer | Varun Wadekar <vwadekar@nvidia.com> | 2011-12-15 11:49:06 +0530 |
| commit | cdd76764cc44d9b6091672af235d52a377a0a4d2 (patch) | |
| tree | 35eebf8a14892a76df3b1ea1960d5b34c6394dd5 /sound/soc/tegra/tegra_pcm.c | |
| parent | 6212a204e86486daf1c870f207d41c32c79b06a9 (diff) | |
ASoC: Tegra: return accurate pcm pointer position
Use DMA driver tegra_dma_get_transfer_count api to get current DMA
position and use it to return accurate PCM poiter position.
Change-Id: I28906a1f2dd47dd91f03b8a79f53196752be6083
Signed-off-by: Sumit Bhattacharya <sumitb@nvidia.com>
Reviewed-on: http://git-master/r/68692
Reviewed-by: Lokesh Pathak <lpathak@nvidia.com>
Tested-by: Lokesh Pathak <lpathak@nvidia.com>
Diffstat (limited to 'sound/soc/tegra/tegra_pcm.c')
| -rw-r--r-- | sound/soc/tegra/tegra_pcm.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/sound/soc/tegra/tegra_pcm.c b/sound/soc/tegra/tegra_pcm.c index 53f4e4c3c08c..a27f65f68325 100644 --- a/sound/soc/tegra/tegra_pcm.c +++ b/sound/soc/tegra/tegra_pcm.c @@ -292,10 +292,15 @@ static snd_pcm_uframes_t tegra_pcm_pointer(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct tegra_runtime_data *prtd = runtime->private_data; + int dma_transfer_count; - return prtd->period_index * runtime->period_size; -} + dma_transfer_count = tegra_dma_get_transfer_count(prtd->dma_chan, + &prtd->dma_req[prtd->dma_req_idx], + false); + return prtd->period_index * runtime->period_size + + bytes_to_frames(runtime, dma_transfer_count); +} static int tegra_pcm_mmap(struct snd_pcm_substream *substream, struct vm_area_struct *vma) |