On Wed, Mar 05, 2014 at 04:34:38PM +0800, RongJun Ying wrote:
> From: Rongjun Ying <rongjun.ying@csr.com>
> 
> This connects platform DAI, hdmi audio  codec DAI  and
> SiRF I2S DAI together and works as a mach driver.

This looks like it should be able to use simple-card?

> +static int sirf_hdmi_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->cpu_dai;
> +	struct snd_soc_codec *codec = rtd->codec;
> +	struct snd_soc_card *card = codec->card;
> +	unsigned int fmt;
> +	int ret;
> +
> +	fmt = card->dai_link[0].dai_fmt;
> +
> +	ret = snd_soc_dai_set_fmt(cpu_dai, fmt);

The whole point with dai_fmt is that the framework will do this for you.