ASoC: rockchip: Add support for DP codec

Add support for optional cdn dp codec.

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

2 files changed, 58 insertions, 2 deletions

diff --git a/sound/soc/rockchip/Kconfig b/sound/soc/rockchip/Kconfig
index c84487805876..8f0d0d8d34e6 100644
--- a/sound/soc/rockchip/Kconfig
+++ b/sound/soc/rockchip/Kconfig
@@ -68,6 +68,7 @@ config SND_SOC_RK3399_GRU_SOUND
         select SND_SOC_RT5514
         select SND_SOC_DA7219
         select SND_SOC_RT5514_SPI
+        select SND_SOC_HDMI_CODEC
         help
           Say Y or M here if you want to add support multiple codecs for SoC
           audio on Rockchip RK3399 GRU boards.
diff --git a/sound/soc/rockchip/rk3399_gru_sound.c b/sound/soc/rockchip/rk3399_gru_sound.c
index 347c34d0db4c..91aab5c18f3b 100644
--- a/sound/soc/rockchip/rk3399_gru_sound.c
+++ b/sound/soc/rockchip/rk3399_gru_sound.c
@@ -228,6 +228,45 @@ 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 const struct snd_soc_ops rockchip_sound_max98357a_ops = {
         .hw_params = rockchip_sound_max98357a_hw_params,
 };
@@ -240,6 +279,10 @@ static const struct snd_soc_ops rockchip_sound_da7219_ops = {
         .hw_params = rockchip_sound_da7219_hw_params,
 };
 
+static struct snd_soc_ops rockchip_sound_cdndp_ops = {
+        .hw_params = rockchip_sound_cdndp_hw_params,
+};
+
 static struct snd_soc_card rockchip_sound_card = {
         .name = "rk3399-gru-sound",
         .owner = THIS_MODULE,
@@ -252,6 +295,7 @@ static struct snd_soc_card rockchip_sound_card = {
 };
 
 enum {
+        DAILINK_CDNDP,
         DAILINK_DA7219,
         DAILINK_MAX98357A,
         DAILINK_RT5514,
@@ -259,6 +303,7 @@ enum {
 };
 
 static const char * const dailink_compat[] = {
+        [DAILINK_CDNDP] = "rockchip,rk3399-cdn-dp",
         [DAILINK_DA7219] = "dlg,da7219",
         [DAILINK_MAX98357A] = "maxim,max98357a",
         [DAILINK_RT5514] = "realtek,rt5514-i2c",
@@ -266,6 +311,14 @@ static const char * const dailink_compat[] = {
 };
 
 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,
+                .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+                        SND_SOC_DAIFMT_CBS_CFS,
+        },
         [DAILINK_DA7219] = {
                 .name = "DA7219",
                 .stream_name = "DA7219 PCM",
@@ -316,7 +369,7 @@ static int rockchip_sound_codec_node_match(struct device_node *np_codec)
 static int rockchip_sound_of_parse_dais(struct device *dev,
                                         struct snd_soc_card *card)
 {
-        struct device_node *np_cpu;
+        struct device_node *np_cpu, *np_cpu0, *np_cpu1;
         struct device_node *np_codec;
         struct snd_soc_dai_link *dai;
         int i, index;
@@ -326,7 +379,8 @@ static int rockchip_sound_of_parse_dais(struct device *dev,
         if (!card->dai_link)
                 return -ENOMEM;
 
-        np_cpu = of_parse_phandle(dev->of_node, "rockchip,cpu", 0);
+        np_cpu0 = of_parse_phandle(dev->of_node, "rockchip,cpu", 0);
+        np_cpu1 = of_parse_phandle(dev->of_node, "rockchip,cpu", 1);
 
         card->num_links = 0;
         for (i = 0; i < ARRAY_SIZE(rockchip_dais); i++) {
@@ -342,6 +396,7 @@ static int rockchip_sound_of_parse_dais(struct device *dev,
                 if (index < 0)
                         continue;
 
+                np_cpu = (index == DAILINK_CDNDP) ? np_cpu1 : np_cpu0;
                 if (!np_cpu) {
                         dev_err(dev, "Missing 'rockchip,cpu' for %s\n",
                                 rockchip_dais[index].name);