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| author | Jai Luthra <j-luthra@ti.com> | 2024-06-11 18:02:55 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-07-25 09:49:14 +0200 |
| commit | 3e25eb518ffef5d1e5d8a044d1e4f2821769aacb (patch) | |
| tree | cd7bbc8de5e54030fe06609793bf96598ab0737a /include | |
| parent | 9b6164e34ad4963ed6fb84f6e42f318ed4990064 (diff) | |
| download | linux-3e25eb518ffef5d1e5d8a044d1e4f2821769aacb.tar.gz linux-3e25eb518ffef5d1e5d8a044d1e4f2821769aacb.tar.bz2 linux-3e25eb518ffef5d1e5d8a044d1e4f2821769aacb.zip | |
ALSA: dmaengine: Synchronize dma channel after drop()
[ Upstream commit e8343410ddf08fc36a9b9cc7c51a4e53a262d4c6 ]
Sometimes the stream may be stopped due to XRUN events, in which case
the userspace can call snd_pcm_drop() and snd_pcm_prepare() to stop and
start the stream again.
In these cases, we must wait for the DMA channel to synchronize before
marking the stream as prepared for playback, as the DMA channel gets
stopped by drop() without any synchronization. Make sure the ALSA core
synchronizes the DMA channel by adding a sync_stop() hook.
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Signed-off-by: Jai Luthra <j-luthra@ti.com>
Link: https://lore.kernel.org/r/20240611-asoc_next-v3-1-fcfd84b12164@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sound/dmaengine_pcm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h index 2df54cf02cb3..74b8ef419d4f 100644 --- a/include/sound/dmaengine_pcm.h +++ b/include/sound/dmaengine_pcm.h @@ -36,6 +36,7 @@ snd_pcm_uframes_t snd_dmaengine_pcm_pointer_no_residue(struct snd_pcm_substream int snd_dmaengine_pcm_open(struct snd_pcm_substream *substream, struct dma_chan *chan); int snd_dmaengine_pcm_close(struct snd_pcm_substream *substream); +int snd_dmaengine_pcm_sync_stop(struct snd_pcm_substream *substream); int snd_dmaengine_pcm_open_request_chan(struct snd_pcm_substream *substream, dma_filter_fn filter_fn, void *filter_data); |