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Commit 9f1614aa authored by Markus Pargmann's avatar Markus Pargmann Committed by Mark Brown
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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: default avatarMarkus Pargmann <mpa@pengutronix.de>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent 38f2b8cb
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+7 −0
Original line number Diff line number Diff line
@@ -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,