From 85a4bfd895778960dc2d655087ac7ff442b6ab9e Mon Sep 17 00:00:00 2001 From: Arnaud Pouliquen Date: Fri, 5 Jun 2015 10:19:05 +0200 Subject: [PATCH] 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: Arnaud Pouliquen Signed-off-by: Mark Brown --- .../devicetree/bindings/sound/simple-card.txt | 6 +++++- sound/soc/generic/simple-card.c | 18 +++++++++++++++--- 2 files changed, 20 insertions(+), 4 deletions(-) diff --git a/Documentation/devicetree/bindings/sound/simple-card.txt b/Documentation/devicetree/bindings/sound/simple-card.txt index 73bf314f7240..cf3979eb3578 100644 --- a/Documentation/devicetree/bindings/sound/simple-card.txt +++ b/Documentation/devicetree/bindings/sound/simple-card.txt @@ -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 diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c index c87e58504a62..d5554939146e 100644 --- a/sound/soc/generic/simple-card.c +++ b/sound/soc/generic/simple-card.c @@ -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, -- 2.20.1