diff options
| author | Sumit Bhattacharya <sumitb@nvidia.com> | 2011-12-07 17:58:14 +0530 |
|---|---|---|
| committer | Varun Wadekar <vwadekar@nvidia.com> | 2011-12-15 11:47:34 +0530 |
| commit | 96d3f4ab25478b4b108118c6839cc386853a78ef (patch) | |
| tree | 05636de6653a7db68a92e89de99461cd90d53bd5 /sound/soc/tegra/tegra_pcm.c | |
| parent | c37dac584d6f0af1dc2b3c941b103bd81d11bd91 (diff) | |
ASoC: Tegra: Acquire wake_lock during playback capture
Acquire wake_lock from alsa kernel when pcm playback/capture
starts and hold it until playack/capture ends. It is needed
to prevent device from going into suspend state in middle
of audio playback.
Change-Id: I71e5fae0268f73a3e57f8d886c1b228d46899ea4
Signed-off-by: Sumit Bhattacharya <sumitb@nvidia.com>
Reviewed-on: http://git-master/r/68671
Reviewed-by: Nikesh Oswal <noswal@nvidia.com>
Reviewed-by: Scott Peterson <speterson@nvidia.com>
Diffstat (limited to 'sound/soc/tegra/tegra_pcm.c')
| -rw-r--r-- | sound/soc/tegra/tegra_pcm.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/sound/soc/tegra/tegra_pcm.c b/sound/soc/tegra/tegra_pcm.c index f506d0954acb..53f4e4c3c08c 100644 --- a/sound/soc/tegra/tegra_pcm.c +++ b/sound/soc/tegra/tegra_pcm.c @@ -185,6 +185,15 @@ static int tegra_pcm_open(struct snd_pcm_substream *substream) if (ret < 0) goto err; +#ifdef CONFIG_HAS_WAKELOCK + snprintf(prtd->tegra_wake_lock_name, sizeof(prtd->tegra_wake_lock_name), + "tegra-pcm-%s-%d", + (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? "out" : "in", + substream->pcm->device); + wake_lock_init(&prtd->tegra_wake_lock, WAKE_LOCK_SUSPEND, + prtd->tegra_wake_lock_name); +#endif + return 0; err: @@ -202,6 +211,10 @@ static int tegra_pcm_close(struct snd_pcm_substream *substream) struct snd_pcm_runtime *runtime = substream->runtime; struct tegra_runtime_data *prtd = runtime->private_data; +#ifdef CONFIG_HAS_WAKELOCK + wake_lock_destroy(&prtd->tegra_wake_lock); +#endif + if (prtd->dma_chan) tegra_dma_free_channel(prtd->dma_chan); @@ -246,6 +259,9 @@ static int tegra_pcm_trigger(struct snd_pcm_substream *substream, int cmd) /* Fall-through */ case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: +#ifdef CONFIG_HAS_WAKELOCK + wake_lock(&prtd->tegra_wake_lock); +#endif spin_lock_irqsave(&prtd->lock, flags); prtd->running = 1; spin_unlock_irqrestore(&prtd->lock, flags); @@ -260,6 +276,10 @@ static int tegra_pcm_trigger(struct snd_pcm_substream *substream, int cmd) spin_unlock_irqrestore(&prtd->lock, flags); tegra_dma_dequeue_req(prtd->dma_chan, &prtd->dma_req[0]); tegra_dma_dequeue_req(prtd->dma_chan, &prtd->dma_req[1]); + +#ifdef CONFIG_HAS_WAKELOCK + wake_unlock(&prtd->tegra_wake_lock); +#endif break; default: return -EINVAL; |