[PATCH v1 5/5] ASoC: qcom: sc8280xp: Add Nord Ride sound card support

[Mohammad Rafi Shaik]

Add support for the Nord Ride sound card by introducing a new
compatible string and associated platform private data.

Nord uses external audio codecs with interface requirements that
differ from the generic SC8280XP platforms. Add a dedicated
hw_params callback to configure the appropriate DAI format for
playback and capture streams and to program the codec system clock
configuration required by the board.

The callback configures the PCM1681 playback path to operate in I2S
mode and the ADAU1979 capture path to operate in DSP_A mode. For
capture, the ADAU1979 system clock is sourced from LRCLK as
required by the hardware design.

Signed-off-by: Mohammad Rafi Shaik <mohammad.rafi.shaik@xxxxxxxxxxxxxxxx>
---
 sound/soc/qcom/sc8280xp.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/sound/soc/qcom/sc8280xp.c b/sound/soc/qcom/sc8280xp.c
index 4d48e1012cd4..4d8eafca4b7f 100644
--- a/sound/soc/qcom/sc8280xp.c
+++ b/sound/soc/qcom/sc8280xp.c
@@ -18,6 +18,7 @@
 #include "common.h"
 #include "sdw.h"
 
+#define LRCLK_SYSCLK 1
 #define I2S_MCLKFS 256
 
 #define I2S_MCLK_RATE(rate) \
@@ -72,6 +73,8 @@ struct qcom_snd_soc_common {
 	bool mi2s_bclk_enable;
 	bool wcd_jack;
 	int (*snd_prepare)(struct snd_pcm_substream *substream);
+	int (*snd_hw_params)(struct snd_pcm_substream *substream,
+			     struct snd_pcm_hw_params *params);
 };
 
 struct sc8280xp_snd_data {
@@ -244,6 +247,47 @@ static int sc8280xp_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
 	return 0;
 }
 
+static int nord_snd_hw_params(struct snd_pcm_substream *substream,
+			      struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
+	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
+	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
+	int rate = params_rate(params);
+	int ret;
+
+	switch (cpu_dai->id) {
+	case TERTIARY_MI2S_RX:
+		ret = snd_soc_dai_set_fmt(codec_dai,
+					  SND_SOC_DAIFMT_CBC_CFC |
+					  SND_SOC_DAIFMT_NB_NF |
+					  SND_SOC_DAIFMT_I2S);
+		if (ret && ret != -ENOTSUPP)
+			return ret;
+
+		break;
+	case TERTIARY_TDM_TX_7:
+		ret = snd_soc_dai_set_fmt(codec_dai,
+					  SND_SOC_DAIFMT_CBC_CFC |
+					  SND_SOC_DAIFMT_NB_NF |
+					  SND_SOC_DAIFMT_DSP_A);
+		if (ret && ret != -ENOTSUPP)
+			return ret;
+
+		/* adau1979 MCLK sourced from LRCLK */
+		ret = snd_soc_component_set_sysclk(codec_dai->component,
+						   0, LRCLK_SYSCLK,
+						   rate, SND_SOC_CLOCK_IN);
+		if (ret && ret != -ENOTSUPP)
+			return ret;
+		break;
+	default:
+		break;
+	};
+
+	return 0;
+}
+
 static int sc8280xp_snd_hw_params(struct snd_pcm_substream *substream,
 				  struct snd_pcm_hw_params *params)
 {
@@ -255,6 +299,12 @@ static int sc8280xp_snd_hw_params(struct snd_pcm_substream *substream,
 	int bclk_freq = sc8280xp_get_bclk_freq(params);
 	int ret;
 
+	if (data->priv->snd_hw_params) {
+		ret = data->priv->snd_hw_params(substream, params);
+		if (ret)
+			return ret;
+	}
+
 	switch (cpu_dai->id) {
 	case PRIMARY_MI2S_RX ... QUATERNARY_MI2S_TX:
 	case QUINARY_MI2S_RX ... QUINARY_MI2S_TX:
@@ -461,6 +511,12 @@ static const struct qcom_snd_soc_common kaanapali_priv_data = {
 	.wcd_jack = true,
 };
 
+static const struct qcom_snd_soc_common nord_ride_priv_data = {
+	.driver_name = "nord",
+	.mi2s_bclk_enable = true,
+	.snd_hw_params = nord_snd_hw_params,
+};
+
 static const struct qcom_snd_soc_common qcs9100_priv_data = {
 	.driver_name = "sa8775p",
 	.dapm_widgets = sc8280xp_dapm_widgets,
@@ -564,6 +620,7 @@ static const struct of_device_id snd_sc8280xp_dt_match[] = {
 	{ .compatible = "qcom,hawi-sndcard", .data = &hawi_priv_data },
 	{ .compatible = "qcom,kaanapali-sndcard", .data = &kaanapali_priv_data },
 	{ .compatible = "qcom,maili-sndcard", .data = &hawi_priv_data },
+	{ .compatible = "qcom,nord-ride-sndcard", .data = &nord_ride_priv_data },
 	{ .compatible = "qcom,qcm6490-idp-sndcard", .data = &qcm6490_priv_data },
 	{ .compatible = "qcom,qcs615-sndcard", .data = &qcs615_priv_data },
 	{ .compatible = "qcom,qcs6490-rb3gen2-sndcard", .data = &qcs6490_priv_data },

-- 
2.34.1