diff options
| author | Markus Pargmann <mpa@pengutronix.de> | 2013-10-11 12:11:02 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-10-14 18:01:50 +0100 |
| commit | 9f1614aae59033b79941220f65ad36f5fe54a579 (patch) | |
| tree | 278affc34bdfbde6cc205abdbd6d5b3f8dd578b9 /include/sound | |
| parent | 38f2b8cbfb1ef517af8af5a63bdff073b7b078fd (diff) | |
| download | lwn-9f1614aae59033b79941220f65ad36f5fe54a579.tar.gz lwn-9f1614aae59033b79941220f65ad36f5fe54a579.zip | |
ASoC: snd_soc_dai_ops trigger function description
Add a comment to the trigger function in snd_soc_dai_ops struct about
possible command sequences.
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'include/sound')
| -rw-r--r-- | include/sound/soc-dai.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h index ae9a227d35d3..0f2e5daa1451 100644 --- a/include/sound/soc-dai.h +++ b/include/sound/soc-dai.h @@ -166,6 +166,13 @@ struct snd_soc_dai_ops { struct snd_soc_dai *); int (*prepare)(struct snd_pcm_substream *, struct snd_soc_dai *); + /* + * NOTE: Commands passed to the trigger function are not necessarily + * compatible with the current state of the dai. For example this + * sequence of commands is possible: START STOP STOP. + * So do not unconditionally use refcounting functions in the trigger + * function, e.g. clk_enable/disable. + */ int (*trigger)(struct snd_pcm_substream *, int, struct snd_soc_dai *); int (*bespoke_trigger)(struct snd_pcm_substream *, int, |