ASoC: DaVinci: Add hw_param callback for S/PDIF DIT link

On TI DM6467 EVM, S/PDIF DIT codec fails to open as it is unable to install
hardware params. This dummy codec has no set_fmt and set_sysclk implementations
and calls from the application to these functions cause errors. This patch adds
a new hardware params callback function for S/PDIF transciever codec.

Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Tested-by: Anuj Aggarwal <anuj.aggarwal@ti.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/davinci/davinci-evm.c b/sound/soc/davinci/davinci-evm.c
index 7ccbe66..dba6651 100644 (file)
--- a/sound/soc/davinci/davinci-evm.c
+++ b/sound/soc/davinci/davinci-evm.c
@@ -81,10 +81,24 @@ static int evm_hw_params(struct snd_pcm_substream *substream,
        return 0;
 }
 
+static int evm_spdif_hw_params(struct snd_pcm_substream *substream,
+                               struct snd_pcm_hw_params *params)
+{
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+
+       /* set cpu DAI configuration */
+       return snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT);
+}
+
 static struct snd_soc_ops evm_ops = {
        .hw_params = evm_hw_params,
 };
 
+static struct snd_soc_ops evm_spdif_ops = {
+       .hw_params = evm_spdif_hw_params,
+};
+
 /* davinci-evm machine dapm widgets */
 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
        SND_SOC_DAPM_HP("Headphone Jack", NULL),
@@ -165,7 +179,7 @@ static struct snd_soc_dai_link dm6467_evm_dai[] = {
                .stream_name = "spdif",
                .cpu_dai = &davinci_mcasp_dai[DAVINCI_MCASP_DIT_DAI],
                .codec_dai = &dit_stub_dai,
-               .ops = &evm_ops,
+               .ops = &evm_spdif_ops,
        },
 };
 static struct snd_soc_dai_link da8xx_evm_dai = {