[PATCH v2 4/4] ASoC: qcom: apq8016_sbc: Add support for msm8953/msm8976 SoC

[Adam Skladowski]

From: Vladimir Lypak <vladimir.lypak@xxxxxxxxx>

Introduce support for audio card on MSM8953/MSM8976 platform.
Main difference between those two is Q6AFE CLK API supported by firmware
which influence way we enable digital codec clock.
Either inside machine driver or outside via q6afe-clocks driver.

Signed-off-by: Vladimir Lypak <vladimir.lypak@xxxxxxxxx>
[Adam: Add MSM8976, rename functions, add mclk setting,add msg]
Co-developed-by: Adam Skladowski <a39.skl@xxxxxxxxx>
Signed-off-by: Adam Skladowski <a39.skl@xxxxxxxxx>
---
 sound/soc/qcom/apq8016_sbc.c | 68 ++++++++++++++++++++++++++++++++++--
 1 file changed, 66 insertions(+), 2 deletions(-)

diff --git a/sound/soc/qcom/apq8016_sbc.c b/sound/soc/qcom/apq8016_sbc.c
index 303dd88206b1..453ca4795603 100644
--- a/sound/soc/qcom/apq8016_sbc.c
+++ b/sound/soc/qcom/apq8016_sbc.c
@@ -22,6 +22,11 @@
 
 #define MI2S_COUNT  (MI2S_QUINARY + 1)
 
+enum afe_clk_api {
+	Q6AFE_CLK_V1,
+	Q6AFE_CLK_V2
+};
+
 struct apq8016_sbc_data {
 	struct snd_soc_card card;
 	void __iomem *mic_iomux;
@@ -29,6 +34,8 @@ struct apq8016_sbc_data {
 	void __iomem *quin_iomux;
 	struct snd_soc_jack jack;
 	bool jack_setup;
+	enum afe_clk_api q6afe_clk_ver;
+	bool dig_cdc_mclk_en;
 	int mi2s_clk_count[MI2S_COUNT];
 };
 
@@ -192,6 +199,28 @@ static int qdsp6_dai_get_lpass_id(struct snd_soc_dai *cpu_dai)
 	}
 }
 
+static int qdsp6_get_clk_id(struct apq8016_sbc_data *data, int mi2s_id)
+{
+	if (data->q6afe_clk_ver == Q6AFE_CLK_V2) {
+		switch (mi2s_id) {
+		case MI2S_PRIMARY:
+			return Q6AFE_LPASS_CLK_ID_PRI_MI2S_IBIT;
+		case MI2S_SECONDARY:
+			return Q6AFE_LPASS_CLK_ID_SEC_MI2S_IBIT;
+		case MI2S_TERTIARY:
+			return Q6AFE_LPASS_CLK_ID_TER_MI2S_IBIT;
+		case MI2S_QUATERNARY:
+			return Q6AFE_LPASS_CLK_ID_QUAD_MI2S_IBIT;
+		case MI2S_QUINARY:
+			return Q6AFE_LPASS_CLK_ID_QUI_MI2S_IBIT;
+		default:
+			break;
+		}
+	}
+	/* If AFE CLK isn't V2 return V1 */
+	return LPAIF_BIT_CLK;
+}
+
 static int msm8916_qdsp6_dai_init(struct snd_soc_pcm_runtime *rtd)
 {
 	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
@@ -214,8 +243,17 @@ static int msm8916_qdsp6_startup(struct snd_pcm_substream *substream)
 
 	if (++data->mi2s_clk_count[mi2s] > 1)
 		return 0;
+	/*
+	 * On newer legacy SoC (MSM8976) lpass codec clocks are not available in gcc region
+	 * so we have to request clock from machine driver using V1 API)
+	 */
+	if (data->q6afe_clk_ver == Q6AFE_CLK_V1 && data->dig_cdc_mclk_en == true) {
+		ret = snd_soc_dai_set_sysclk(cpu_dai,  LPAIF_DIG_CLK, DEFAULT_MCLK_RATE, 0);
+		if (ret)
+			dev_err(card->dev, "Failed to enable LPAIF dig clk: %d\n", ret);
+	}
 
-	ret = snd_soc_dai_set_sysclk(cpu_dai, LPAIF_BIT_CLK, MI2S_BCLK_RATE, 0);
+	ret = snd_soc_dai_set_sysclk(cpu_dai, qdsp6_get_clk_id(data, mi2s), MI2S_BCLK_RATE, 0);
 	if (ret)
 		dev_err(card->dev, "Failed to enable LPAIF bit clk: %d\n", ret);
 	return ret;
@@ -236,9 +274,16 @@ static void msm8916_qdsp6_shutdown(struct snd_pcm_substream *substream)
 	if (--data->mi2s_clk_count[mi2s] > 0)
 		return;
 
-	ret = snd_soc_dai_set_sysclk(cpu_dai, LPAIF_BIT_CLK, 0, 0);
+	ret = snd_soc_dai_set_sysclk(cpu_dai, qdsp6_get_clk_id(data, mi2s), 0, 0);
 	if (ret)
 		dev_err(card->dev, "Failed to disable LPAIF bit clk: %d\n", ret);
+
+	if (data->q6afe_clk_ver == Q6AFE_CLK_V1 && data->dig_cdc_mclk_en == true) {
+		ret = snd_soc_dai_set_sysclk(cpu_dai,  LPAIF_DIG_CLK, 0, 0);
+		if (ret)
+			dev_err(card->dev, "Failed to disable LPAIF dig clk: %d\n", ret);
+	}
+
 }
 
 static const struct snd_soc_ops msm8916_qdsp6_be_ops = {
@@ -279,6 +324,23 @@ static void msm8916_qdsp6_add_ops(struct snd_soc_card *card)
 	}
 }
 
+static void msm8953_qdsp6_add_ops(struct snd_soc_card *card)
+{
+	struct apq8016_sbc_data *pdata = snd_soc_card_get_drvdata(card);
+
+	pdata->q6afe_clk_ver = Q6AFE_CLK_V2;
+	msm8916_qdsp6_add_ops(card);
+}
+
+static void msm8976_qdsp6_add_ops(struct snd_soc_card *card)
+{
+	struct apq8016_sbc_data *pdata = snd_soc_card_get_drvdata(card);
+
+	pdata->q6afe_clk_ver = Q6AFE_CLK_V1;
+	pdata->dig_cdc_mclk_en = true;
+	msm8916_qdsp6_add_ops(card);
+}
+
 static const struct snd_kcontrol_new apq8016_sbc_snd_controls[] = {
 	SOC_DAPM_PIN_SWITCH("Headphone Jack"),
 	SOC_DAPM_PIN_SWITCH("Mic Jack"),
@@ -343,6 +405,8 @@ static int apq8016_sbc_platform_probe(struct platform_device *pdev)
 static const struct of_device_id apq8016_sbc_device_id[] __maybe_unused = {
 	{ .compatible = "qcom,apq8016-sbc-sndcard", .data = apq8016_sbc_add_ops },
 	{ .compatible = "qcom,msm8916-qdsp6-sndcard", .data = msm8916_qdsp6_add_ops },
+	{ .compatible = "qcom,msm8953-qdsp6-sndcard", .data = msm8953_qdsp6_add_ops },
+	{ .compatible = "qcom,msm8976-qdsp6-sndcard", .data = msm8976_qdsp6_add_ops },
 	{},
 };
 MODULE_DEVICE_TABLE(of, apq8016_sbc_device_id);
-- 
2.45.2