Re: [PATCH v4 08/16] ASoC: mediatek: mt8365: Add DMIC DAI support

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Il 26/04/24 19:22, Alexandre Mergnat ha scritto:
Add Digital Micro Device Audio Interface support for MT8365 SoC.

Signed-off-by: Alexandre Mergnat <amergnat@xxxxxxxxxxxx>
---
  sound/soc/mediatek/mt8365/mt8365-dai-dmic.c | 347 ++++++++++++++++++++++++++++
  1 file changed, 347 insertions(+)

diff --git a/sound/soc/mediatek/mt8365/mt8365-dai-dmic.c b/sound/soc/mediatek/mt8365/mt8365-dai-dmic.c
new file mode 100644
index 000000000000..0dd606274d8e
--- /dev/null
+++ b/sound/soc/mediatek/mt8365/mt8365-dai-dmic.c
@@ -0,0 +1,347 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Mediatek 8365 ALSA SoC Audio DAI DMIC Control
+ *
+ * Copyright (c) 2024 MediaTek Inc.
+ * Authors: Jia Zeng <jia.zeng@xxxxxxxxxxxx>
+ *          Alexandre Mergnat <amergnat@xxxxxxxxxxxx>
+ */
+
+#include <linux/bitops.h>
+#include <linux/regmap.h>
+#include <sound/pcm_params.h>
+#include "mt8365-afe-clk.h"
+#include "mt8365-afe-common.h"
+
+struct mt8365_dmic_data {
+	bool two_wire_mode;
+	unsigned int clk_phase_sel_ch1;
+	unsigned int clk_phase_sel_ch2;
+	bool iir_on;
+	unsigned int irr_mode;
+	unsigned int dmic_mode;
+	unsigned int dmic_channel;
+};
+
+static int get_chan_reg(unsigned int channel)
+{
+	switch (channel) {
+	case 8:
+		fallthrough;
+	case 7:
+		return AFE_DMIC3_UL_SRC_CON0;
+	case 6:
+		fallthrough;
+	case 5:
+		return AFE_DMIC2_UL_SRC_CON0;
+	case 4:
+		fallthrough;
+	case 3:
+		return AFE_DMIC1_UL_SRC_CON0;
+	case 2:
+		fallthrough;
+	case 1:
+		return AFE_DMIC0_UL_SRC_CON0;
+	default:
+		return -EINVAL;
+	}
+}
+
+/* DAI Drivers */
+
+static void audio_dmic_adda_enable(struct mtk_base_afe *afe)
+{
+	mt8365_dai_enable_adda_on(afe);
+	regmap_update_bits(afe->regmap, AFE_ADDA_UL_DL_CON0,
+			   AFE_ADDA_UL_DL_DMIC_CLKDIV_ON,
+			   AFE_ADDA_UL_DL_DMIC_CLKDIV_ON);
+}
+
+static void audio_dmic_adda_disable(struct mtk_base_afe *afe)
+{
+	regmap_update_bits(afe->regmap, AFE_ADDA_UL_DL_CON0,
+			   AFE_ADDA_UL_DL_DMIC_CLKDIV_ON,
+			   ~AFE_ADDA_UL_DL_DMIC_CLKDIV_ON);
+	mt8365_dai_disable_adda_on(afe);
+}
+
+static void mt8365_dai_enable_dmic(struct mtk_base_afe *afe,
+				   struct snd_pcm_substream *substream,
+				   struct snd_soc_dai *dai)
+{
+	struct mt8365_afe_private *afe_priv = afe->platform_priv;
+	struct mt8365_dmic_data *dmic_data = afe_priv->dai_priv[MT8365_AFE_IO_DMIC];
+	unsigned int val_mask;
+	int reg = get_chan_reg(dmic_data->dmic_channel);
+
+	if (reg < 0)
+		return;
+
+	/* val and mask will be always same to enable */
+	val_mask = DMIC_TOP_CON_CH1_ON |
+		   DMIC_TOP_CON_CH2_ON |
+		   DMIC_TOP_CON_SRC_ON;
+
+	regmap_update_bits(afe->regmap, reg, val_mask, val_mask);
+}
+
+static void mt8365_dai_disable_dmic(struct mtk_base_afe *afe,
+				    struct snd_pcm_substream *substream,
+				    struct snd_soc_dai *dai)
+{
+	struct mt8365_afe_private *afe_priv = afe->platform_priv;
+	struct mt8365_dmic_data *dmic_data = afe_priv->dai_priv[MT8365_AFE_IO_DMIC];
+	unsigned int mask;
+	int reg = get_chan_reg(dmic_data->dmic_channel);
+
+	if (reg < 0)
+		return;
+
+	dev_info(afe->dev, "%s dmic_channel %d\n",
+		 __func__, dmic_data->dmic_channel);

Please, either remove this print, or use dev_dbg().
In case you're not removing it, fits in one line.

+
+	mask = DMIC_TOP_CON_CH1_ON |
+	       DMIC_TOP_CON_CH2_ON |
+	       DMIC_TOP_CON_SRC_ON |
+	       DMIC_TOP_CON_SDM3_LEVEL_MODE;
+
+	/* Set all masked values to 0 */
+	regmap_update_bits(afe->regmap, reg, mask, 0);
+}
+
+static const struct reg_sequence mt8365_dmic_iir_coeff[] = {
+	{ AFE_DMIC0_IIR_COEF_02_01, 0x00000000 },
+	{ AFE_DMIC0_IIR_COEF_04_03, 0x00003FB8 },
+	{ AFE_DMIC0_IIR_COEF_06_05, 0x3FB80000 },
+	{ AFE_DMIC0_IIR_COEF_08_07, 0x3FB80000 },
+	{ AFE_DMIC0_IIR_COEF_10_09, 0x0000C048 },
+	{ AFE_DMIC1_IIR_COEF_02_01, 0x00000000 },
+	{ AFE_DMIC1_IIR_COEF_04_03, 0x00003FB8 },
+	{ AFE_DMIC1_IIR_COEF_06_05, 0x3FB80000 },
+	{ AFE_DMIC1_IIR_COEF_08_07, 0x3FB80000 },
+	{ AFE_DMIC1_IIR_COEF_10_09, 0x0000C048 },
+	{ AFE_DMIC2_IIR_COEF_02_01, 0x00000000 },
+	{ AFE_DMIC2_IIR_COEF_04_03, 0x00003FB8 },
+	{ AFE_DMIC2_IIR_COEF_06_05, 0x3FB80000 },
+	{ AFE_DMIC2_IIR_COEF_08_07, 0x3FB80000 },
+	{ AFE_DMIC2_IIR_COEF_10_09, 0x0000C048 },
+	{ AFE_DMIC3_IIR_COEF_02_01, 0x00000000 },
+	{ AFE_DMIC3_IIR_COEF_04_03, 0x00003FB8 },
+	{ AFE_DMIC3_IIR_COEF_06_05, 0x3FB80000 },
+	{ AFE_DMIC3_IIR_COEF_08_07, 0x3FB80000 },
+	{ AFE_DMIC3_IIR_COEF_10_09, 0x0000C048 },
+};
+
+static int mt8365_dai_load_dmic_iir_coeff_table(struct mtk_base_afe *afe)
+{
+	return regmap_multi_reg_write(afe->regmap,
+				      mt8365_dmic_iir_coeff,
+				      ARRAY_SIZE(mt8365_dmic_iir_coeff));
+}
+
+static int mt8365_dai_configure_dmic(struct mtk_base_afe *afe,
+				     struct snd_pcm_substream *substream,
+				     struct snd_soc_dai *dai)
+{
+	struct mt8365_afe_private *afe_priv = afe->platform_priv;
+	struct mt8365_dmic_data *dmic_data = afe_priv->dai_priv[MT8365_AFE_IO_DMIC];
+	bool two_wire_mode = dmic_data->two_wire_mode;
+	unsigned int clk_phase_sel_ch1 = dmic_data->clk_phase_sel_ch1;
+	unsigned int clk_phase_sel_ch2 = dmic_data->clk_phase_sel_ch2;
+	unsigned int val = 0;
+	unsigned int mask = 0;
+	unsigned int rate = dai->rate;
+	int reg = get_chan_reg(dai->channels);
+
+	if (reg < 0)
+		return -EINVAL;
+
+	dmic_data->dmic_channel = dai->channels;
+
+	val |= DMIC_TOP_CON_SDM3_LEVEL_MODE;
+	mask |= DMIC_TOP_CON_SDM3_LEVEL_MODE;
+
+	if (two_wire_mode) {
+		val |= DMIC_TOP_CON_TWO_WIRE_MODE;
+		mask |= DMIC_TOP_CON_TWO_WIRE_MODE;
+	} else {
+		val |= FIELD_PREP(DMIC_TOP_CON_CK_PHASE_SEL_CH1,
+				  clk_phase_sel_ch1);
+		val |= FIELD_PREP(DMIC_TOP_CON_CK_PHASE_SEL_CH2,
+				  clk_phase_sel_ch2);
+		mask |= DMIC_TOP_CON_CK_PHASE_SEL_CH1;
+		mask |= DMIC_TOP_CON_CK_PHASE_SEL_CH2;
+	}
+
+	switch (rate) {
+	case 48000:
+		val |= DMIC_TOP_CON_VOICE_MODE_48K;
+		break;
+	case 32000:
+		val |= DMIC_TOP_CON_VOICE_MODE_32K;
+		break;
+	case 16000:
+		val |= DMIC_TOP_CON_VOICE_MODE_16K;
+		break;
+	case 8000:
+		val |= DMIC_TOP_CON_VOICE_MODE_8K;
+		break;
+	default:
+		return -EINVAL;
+	}
+	mask |= DMIC_TOP_CON_VOICE_MODE_MASK;

You initialize the mask...

+
+	regmap_update_bits(afe->regmap, reg, DMIC_TOP_CON_CONFIG_MASK, val);

...but then you don't use it? :-)

+
+	return 0;
+}


Cheers,
Angelo




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