From 2e3c724c167ec5da8b1ed5ab07cda55232ecdf13 Mon Sep 17 00:00:00 2001 From: ScottPeterson Date: Tue, 17 Jan 2012 17:32:11 -0800 Subject: asoc:tegra: Support I2S slave mode Support I2S slave mode. Disable pll_p_out1 and pll_a to reduce power when in slave mode. Slave mode disabled by default. Reviewed-on: http://git-master/r/76046 Change-Id: I873a11d54f1e037d99c86ff4cec06ee83064902a Signed-off-by: ScottPeterson Signed-off-by: Varun Wadekar Reviewed-on: http://git-master/r/77765 Reviewed-by: Automatic_Commit_Validation_User --- sound/soc/tegra/tegra_aic326x.c | 29 ++++++++++++++++++++++++++--- 1 file changed, 26 insertions(+), 3 deletions(-) (limited to 'sound/soc/tegra/tegra_aic326x.c') diff --git a/sound/soc/tegra/tegra_aic326x.c b/sound/soc/tegra/tegra_aic326x.c index a7297a54233a..31afb907a653 100644 --- a/sound/soc/tegra/tegra_aic326x.c +++ b/sound/soc/tegra/tegra_aic326x.c @@ -237,6 +237,32 @@ static int tegra_aic326x_hw_params(struct snd_pcm_substream *substream, if (mclk < 0) return mclk; + +#if defined(CONFIG_ARCH_TEGRA_2x_SOC) + clk = clk_get_sys(NULL, "cdev1"); +#else + clk = clk_get_sys("extern1", NULL); +#endif + if (IS_ERR(clk)) { + dev_err(card->dev, "Can't retrieve clk cdev1\n"); + err = PTR_ERR(clk); + return err; + } + + rate = clk_get_rate(clk); + printk("extern1 rate=%d\n",rate); + +#if TEGRA30_I2S_MASTER_PLAYBACK + daifmt = SND_SOC_DAIFMT_I2S | + SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBS_CFS; +#else + daifmt = SND_SOC_DAIFMT_I2S | + SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBM_CFM; + mclk = rate; +#endif + err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk); if (err < 0) { if (!(machine->util_data.set_mclk % mclk)) @@ -249,9 +275,6 @@ static int tegra_aic326x_hw_params(struct snd_pcm_substream *substream, tegra_asoc_utils_lock_clk_rate(&machine->util_data, 1); - daifmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | - SND_SOC_DAIFMT_CBS_CFS; - err = snd_soc_dai_set_fmt(codec_dai, daifmt); if (err < 0) { dev_err(card->dev, "codec_dai fmt not set\n"); -- cgit v1.2.3