diff options
| author | ScottPeterson <speterson@nvidia.com> | 2012-01-17 17:32:11 -0800 |
|---|---|---|
| committer | Varun Colbert <vcolbert@nvidia.com> | 2012-01-30 13:28:18 -0800 |
| commit | 2e3c724c167ec5da8b1ed5ab07cda55232ecdf13 (patch) | |
| tree | d82c4c6da45dd46de1aa0c75393869470fe033e3 /sound/soc/tegra/tegra_max98088.c | |
| parent | 6814bf677b18c10cee192e813d3d468b01229a25 (diff) | |
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 <speterson@nvidia.com>
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Reviewed-on: http://git-master/r/77765
Reviewed-by: Automatic_Commit_Validation_User
Diffstat (limited to 'sound/soc/tegra/tegra_max98088.c')
| -rw-r--r-- | sound/soc/tegra/tegra_max98088.c | 41 |
1 files changed, 32 insertions, 9 deletions
diff --git a/sound/soc/tegra/tegra_max98088.c b/sound/soc/tegra/tegra_max98088.c index d666a953a394..61f45936e440 100644 --- a/sound/soc/tegra/tegra_max98088.c +++ b/sound/soc/tegra/tegra_max98088.c @@ -30,6 +30,7 @@ #include <asm/mach-types.h> +#include <linux/clk.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/slab.h> @@ -223,8 +224,10 @@ static int tegra_max98088_hw_params(struct snd_pcm_substream *substream, #ifndef CONFIG_ARCH_TEGRA_2x_SOC struct tegra30_i2s *i2s = snd_soc_dai_get_drvdata(cpu_dai); #endif - int srate, mclk, sample_size; + int srate, mclk, sample_size, i2s_daifmt; int err; + struct clk *clk; + int rate; switch (params_format(params)) { case SNDRV_PCM_FORMAT_S16_LE: @@ -256,6 +259,32 @@ static int tegra_max98088_hw_params(struct snd_pcm_substream *substream, break; } + +#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 + i2s_daifmt = SND_SOC_DAIFMT_I2S | + SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBS_CFS; +#else + i2s_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)) @@ -268,19 +297,13 @@ static int tegra_max98088_hw_params(struct snd_pcm_substream *substream, tegra_asoc_utils_lock_clk_rate(&machine->util_data, 1); - err = snd_soc_dai_set_fmt(codec_dai, - SND_SOC_DAIFMT_I2S | - SND_SOC_DAIFMT_NB_NF | - SND_SOC_DAIFMT_CBS_CFS); + err = snd_soc_dai_set_fmt(codec_dai,i2s_daifmt); if (err < 0) { dev_err(card->dev, "codec_dai fmt not set\n"); return err; } - err = snd_soc_dai_set_fmt(cpu_dai, - SND_SOC_DAIFMT_I2S | - SND_SOC_DAIFMT_NB_NF | - SND_SOC_DAIFMT_CBS_CFS); + err = snd_soc_dai_set_fmt(cpu_dai, i2s_daifmt); if (err < 0) { dev_err(card->dev, "cpu_dai fmt not set\n"); return err; |