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Commit 85a4bfd8 authored by Arnaud Pouliquen's avatar Arnaud Pouliquen Committed by Mark Brown
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ASoC: simple card: Add mclk-fs property in dai-link 



Add mclk-fs ratio property per dai-link sub node. This will
allow to manage several codecs with different ratio.

Signed-off-by: default avatarArnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent e0ae225b

Documentation/devicetree/bindings/sound/simple-card.txt

+5 −1
Original line number Diff line number Diff line
@@ -16,7 +16,8 @@ Optional properties: 
					  connection's sink, the second being the connection's

					  source.

- simple-audio-card,mclk-fs             : Multiplication factor between stream rate and codec

  					  mclk.

					  mclk. When defined, mclk-fs property defined in

					  dai-link sub nodes are ignored.

- simple-audio-card,hp-det-gpio		: Reference to GPIO that signals when

					  headphones are attached.

- simple-audio-card,mic-det-gpio	: Reference to GPIO that signals when
@@ -55,6 +56,9 @@ Optional dai-link subnode properties: 
					  dai-link uses bit clock inversion.

- frame-inversion			: bool property. Add this if the

					  dai-link uses frame clock inversion.

- mclk-fs             			: Multiplication factor between stream

					  rate and codec mclk, applied only for

					  the dai-link.



For backward compatibility the frame-master and bitclock-master

properties can be used as booleans in codec subnode to indicate if the

sound/soc/generic/simple-card.c

+15 −3
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ struct simple_card_data { 
	struct simple_dai_props {

		struct asoc_simple_dai cpu_dai;

		struct asoc_simple_dai codec_dai;

		unsigned int mclk_fs;

	} *dai_props;

	unsigned int mclk_fs;

	int gpio_hp_det;
@@ -76,11 +77,18 @@ static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream, 
	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct snd_soc_dai *codec_dai = rtd->codec_dai;

	struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);

	unsigned int mclk;

	struct simple_dai_props *dai_props =

		&priv->dai_props[rtd - rtd->card->rtd];

	unsigned int mclk, mclk_fs = 0;

	int ret = 0;



	if (priv->mclk_fs) {

		mclk = params_rate(params) * priv->mclk_fs;

	if (priv->mclk_fs)

		mclk_fs = priv->mclk_fs;

	else if (dai_props->mclk_fs)

		mclk_fs = dai_props->mclk_fs;



	if (mclk_fs) {

		mclk = params_rate(params) * mclk_fs;

		ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,

					     SND_SOC_CLOCK_IN);

	}
@@ -313,6 +321,7 @@ static int asoc_simple_card_dai_link_of(struct device_node *node, 
	char prop[128];

	char *prefix = "";

	int ret, cpu_args;

	u32 val;



	/* For single DAI link & old style of DT node */

	if (is_top_level_node)
@@ -338,6 +347,9 @@ static int asoc_simple_card_dai_link_of(struct device_node *node, 
	if (ret < 0)

		goto dai_link_of_err;



	if (!of_property_read_u32(node, "mclk-fs", &val))

		dai_props->mclk_fs = val;



	ret = asoc_simple_card_sub_parse_of(cpu, &dai_props->cpu_dai,

					    &dai_link->cpu_of_node,

					    &dai_link->cpu_dai_name,