ASoC: soc-pcm: Allow to specify unidirectional dai_link (d6bead02) · Commits · 戴 / test

Add 'playback_only' and 'capture_only' fields that can be used for specifying that a dai_link has a unidirectional capability. The motivation for this is for the cases of systems, such as Freescale MX28, that has two unidirectional DAIs. Signed-off-by:

Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by:

Mark Brown <broonie@linaro.org>

include/sound/soc.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -936,6 +936,10 @@ struct snd_soc_dai_link {
		/* machine stream operations */
		const struct snd_soc_ops *ops;
		const struct snd_soc_compr_ops *compr_ops;

		/* For unidirectional dai links */
		bool playback_only;
		bool capture_only;
		};

		struct snd_soc_codec_conf {

sound/soc/soc-pcm.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -2027,6 +2027,16 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
		capture = 1;
		}

		if (rtd->dai_link->playback_only) {
		playback = 1;
		capture = 0;
		}

		if (rtd->dai_link->capture_only) {
		playback = 0;
		capture = 1;
		}

		/* create the PCM */
		if (rtd->dai_link->no_pcm) {
		snprintf(new_name, sizeof(new_name), "(%s)",

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