ASoC: rockchip: cdn-dp sound output use spdif

some monitors care about the parity bit in the sub-frame of I2S,
but the cdn-dp always set this bit to "1", so these monitors
do not have sound output if use i2s, use spdif can fix this issue.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Signed-off-by: Lin Huang <hl@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/rockchip/rk3399_gru_sound.c

@@ -220,45 +220,6 @@ static int rockchip_sound_da7219_init(struct snd_soc_pcm_runtime *rtd)
 	return 0;
 }
 
-static int rockchip_sound_cdndp_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_dai *codec_dai = rtd->codec_dai;
-	int mclk, ret;
-
-	/* in bypass mode, the mclk has to be one of the frequencies below */
-	switch (params_rate(params)) {
-	case 8000:
-	case 16000:
-	case 24000:
-	case 32000:
-	case 48000:
-	case 64000:
-	case 96000:
-		mclk = 12288000;
-		break;
-	case 11025:
-	case 22050:
-	case 44100:
-	case 88200:
-		mclk = 11289600;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
-				     SND_SOC_CLOCK_OUT);
-	if (ret < 0) {
-		dev_err(codec_dai->dev, "Can't set cpu clock out %d\n", ret);
-		return ret;
-	}
-
-	return 0;
-}
-
 static int rockchip_sound_dmic_hw_params(struct snd_pcm_substream *substream,
 			     struct snd_pcm_hw_params *params)
 {
@@ -293,10 +254,6 @@ static const struct snd_soc_ops rockchip_sound_da7219_ops = {
 	.hw_params = rockchip_sound_da7219_hw_params,
 };
 
-static const struct snd_soc_ops rockchip_sound_cdndp_ops = {
-	.hw_params = rockchip_sound_cdndp_hw_params,
-};
-
 static const struct snd_soc_ops rockchip_sound_dmic_ops = {
 	.hw_params = rockchip_sound_dmic_hw_params,
 };
@@ -323,8 +280,7 @@ static const struct snd_soc_dai_link rockchip_dais[] = {
 	[DAILINK_CDNDP] = {
 		.name = "DP",
 		.stream_name = "DP PCM",
-		.codec_dai_name = "i2s-hifi",
-		.ops = &rockchip_sound_cdndp_ops,
+		.codec_dai_name = "spdif-hifi",
 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 			SND_SOC_DAIFMT_CBS_CFS,
 	},