| Message ID | 1400491433-16860-1-git-send-email-tushar.behera@linaro.org |
|---|---|
| State | Accepted |
| Commit | 02fb05a598e9393382f55132a36aff84f4d76ad5 |
| Headers | show |
On 05/19/2014 11:23 AM, Tushar Behera wrote: > Currently snd_dmaengine_pcm_trigger() calls dmaengine_pause() > unconditinally during device suspend. In case where DMA controller > doesn't support PAUSE/RESUME functionality, this call is not able > to stop the DMA controller. In this scenario, audio playback doesn't > resume after device resume. > > Calling dmaengine_pause/dmaengine_terminate_all conditionally fixes > the issue. > > It has been tested with audio playback on Samsung platform having > PL330 DMA controller which doesn't support PAUSE/RESUME. > > Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Thanks. > --- > sound/core/pcm_dmaengine.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/sound/core/pcm_dmaengine.c b/sound/core/pcm_dmaengine.c > index 94d0873..76cbb9e 100644 > --- a/sound/core/pcm_dmaengine.c > +++ b/sound/core/pcm_dmaengine.c > @@ -182,6 +182,7 @@ static int dmaengine_pcm_prepare_and_submit(struct snd_pcm_substream *substream) > int snd_dmaengine_pcm_trigger(struct snd_pcm_substream *substream, int cmd) > { > struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream); > + struct snd_pcm_runtime *runtime = substream->runtime; > int ret; > > switch (cmd) { > @@ -196,6 +197,11 @@ int snd_dmaengine_pcm_trigger(struct snd_pcm_substream *substream, int cmd) > dmaengine_resume(prtd->dma_chan); > break; > case SNDRV_PCM_TRIGGER_SUSPEND: > + if (runtime->info & SNDRV_PCM_INFO_PAUSE) > + dmaengine_pause(prtd->dma_chan); > + else > + dmaengine_terminate_all(prtd->dma_chan); > + break; > case SNDRV_PCM_TRIGGER_PAUSE_PUSH: > dmaengine_pause(prtd->dma_chan); > break; > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
At Mon, 19 May 2014 14:53:53 +0530, Tushar Behera wrote: > > Currently snd_dmaengine_pcm_trigger() calls dmaengine_pause() > unconditinally during device suspend. In case where DMA controller > doesn't support PAUSE/RESUME functionality, this call is not able > to stop the DMA controller. In this scenario, audio playback doesn't > resume after device resume. > > Calling dmaengine_pause/dmaengine_terminate_all conditionally fixes > the issue. > > It has been tested with audio playback on Samsung platform having > PL330 DMA controller which doesn't support PAUSE/RESUME. > > Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Thanks, applied with Ack from Las. Found in for-linus branch of sound git tree. Takashi > --- > sound/core/pcm_dmaengine.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/sound/core/pcm_dmaengine.c b/sound/core/pcm_dmaengine.c > index 94d0873..76cbb9e 100644 > --- a/sound/core/pcm_dmaengine.c > +++ b/sound/core/pcm_dmaengine.c > @@ -182,6 +182,7 @@ static int dmaengine_pcm_prepare_and_submit(struct snd_pcm_substream *substream) > int snd_dmaengine_pcm_trigger(struct snd_pcm_substream *substream, int cmd) > { > struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream); > + struct snd_pcm_runtime *runtime = substream->runtime; > int ret; > > switch (cmd) { > @@ -196,6 +197,11 @@ int snd_dmaengine_pcm_trigger(struct snd_pcm_substream *substream, int cmd) > dmaengine_resume(prtd->dma_chan); > break; > case SNDRV_PCM_TRIGGER_SUSPEND: > + if (runtime->info & SNDRV_PCM_INFO_PAUSE) > + dmaengine_pause(prtd->dma_chan); > + else > + dmaengine_terminate_all(prtd->dma_chan); > + break; > case SNDRV_PCM_TRIGGER_PAUSE_PUSH: > dmaengine_pause(prtd->dma_chan); > break; > -- > 1.7.9.5 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
diff --git a/sound/core/pcm_dmaengine.c b/sound/core/pcm_dmaengine.c index 94d0873..76cbb9e 100644 --- a/sound/core/pcm_dmaengine.c +++ b/sound/core/pcm_dmaengine.c @@ -182,6 +182,7 @@ static int dmaengine_pcm_prepare_and_submit(struct snd_pcm_substream *substream) int snd_dmaengine_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream); + struct snd_pcm_runtime *runtime = substream->runtime; int ret; switch (cmd) { @@ -196,6 +197,11 @@ int snd_dmaengine_pcm_trigger(struct snd_pcm_substream *substream, int cmd) dmaengine_resume(prtd->dma_chan); break; case SNDRV_PCM_TRIGGER_SUSPEND: + if (runtime->info & SNDRV_PCM_INFO_PAUSE) + dmaengine_pause(prtd->dma_chan); + else + dmaengine_terminate_all(prtd->dma_chan); + break; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: dmaengine_pause(prtd->dma_chan); break;
Currently snd_dmaengine_pcm_trigger() calls dmaengine_pause() unconditinally during device suspend. In case where DMA controller doesn't support PAUSE/RESUME functionality, this call is not able to stop the DMA controller. In this scenario, audio playback doesn't resume after device resume. Calling dmaengine_pause/dmaengine_terminate_all conditionally fixes the issue. It has been tested with audio playback on Samsung platform having PL330 DMA controller which doesn't support PAUSE/RESUME. Signed-off-by: Tushar Behera <tushar.behera@linaro.org> --- sound/core/pcm_dmaengine.c | 6 ++++++ 1 file changed, 6 insertions(+)