Mailing List Archive

Add Digital Micro Device Audio Interface support for MT8365 SoC.

Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com>
---
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@mediatek.com>
+ * Alexandre Mergnat <amergnat@baylibre.com>
+ */
+
+#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);
+
+ 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;
+
+ regmap_update_bits(afe->regmap, reg, DMIC_TOP_CON_CONFIG_MASK, val);
+
+ return 0;
+}
+
+static int mt8365_dai_dmic_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+
+ mt8365_afe_enable_main_clk(afe);
+
+ mt8365_afe_enable_top_cg(afe, MT8365_TOP_CG_DMIC0_ADC);
+ mt8365_afe_enable_top_cg(afe, MT8365_TOP_CG_DMIC1_ADC);
+ mt8365_afe_enable_top_cg(afe, MT8365_TOP_CG_DMIC2_ADC);
+ mt8365_afe_enable_top_cg(afe, MT8365_TOP_CG_DMIC3_ADC);
+
+ audio_dmic_adda_enable(afe);
+
+ return 0;
+}
+
+static void mt8365_dai_dmic_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+
+ mt8365_dai_disable_dmic(afe, substream, dai);
+ audio_dmic_adda_disable(afe);
+ /* HW Request delay 125us before CG off */
+ usleep_range(125, 300);
+ mt8365_afe_disable_top_cg(afe, MT8365_TOP_CG_DMIC3_ADC);
+ mt8365_afe_disable_top_cg(afe, MT8365_TOP_CG_DMIC2_ADC);
+ mt8365_afe_disable_top_cg(afe, MT8365_TOP_CG_DMIC1_ADC);
+ mt8365_afe_disable_top_cg(afe, MT8365_TOP_CG_DMIC0_ADC);
+
+ mt8365_afe_disable_main_clk(afe);
+}
+
+static int mt8365_dai_dmic_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+
+ mt8365_dai_configure_dmic(afe, substream, dai);
+ mt8365_dai_enable_dmic(afe, substream, dai);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops mt8365_afe_dmic_ops = {
+ .startup = mt8365_dai_dmic_startup,
+ .shutdown = mt8365_dai_dmic_shutdown,
+ .prepare = mt8365_dai_dmic_prepare,
+};
+
+static struct snd_soc_dai_driver mtk_dai_dmic_driver[] = {
+ {
+ .name = "DMIC",
+ .id = MT8365_AFE_IO_DMIC,
+ .capture = {
+ .stream_name = "DMIC Capture",
+ .channels_min = 1,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_16000 |
+ SNDRV_PCM_RATE_32000 |
+ SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ },
+ .ops = &mt8365_afe_dmic_ops,
+ }
+};
+
+/* DAI Controls */
+
+/* Values for 48kHz mode */
+static const char * const iir_mode_src[] = {
+ "SW custom", "5Hz", "10Hz", "25Hz", "50Hz", "65Hz"
+};
+
+static SOC_ENUM_SINGLE_DECL(iir_mode, AFE_DMIC0_UL_SRC_CON0, 7, iir_mode_src);
+
+static const struct snd_kcontrol_new mtk_dai_dmic_controls[] = {
+ SOC_SINGLE("DMIC IIR Switch", AFE_DMIC0_UL_SRC_CON0, DMIC_TOP_CON_IIR_ON, 1, 0),
+ SOC_ENUM("DMIC IIR Mode", iir_mode),
+};
+
+/* DAI widget */
+
+static const struct snd_soc_dapm_widget mtk_dai_dmic_widgets[] = {
+ SND_SOC_DAPM_INPUT("DMIC In"),
+};
+
+/* DAI route */
+
+static const struct snd_soc_dapm_route mtk_dai_dmic_routes[] = {
+ {"I14", NULL, "DMIC Capture"},
+ {"I15", NULL, "DMIC Capture"},
+ {"I16", NULL, "DMIC Capture"},
+ {"I17", NULL, "DMIC Capture"},
+ {"I18", NULL, "DMIC Capture"},
+ {"I19", NULL, "DMIC Capture"},
+ {"I20", NULL, "DMIC Capture"},
+ {"I21", NULL, "DMIC Capture"},
+ {"DMIC Capture", NULL, "DMIC In"},
+};
+
+static int init_dmic_priv_data(struct mtk_base_afe *afe)
+{
+ struct mt8365_afe_private *afe_priv = afe->platform_priv;
+ struct mt8365_dmic_data *dmic_priv;
+ struct device_node *np = afe->dev->of_node;
+ unsigned int temps[4];
+ int ret;
+
+ dmic_priv = devm_kzalloc(afe->dev, sizeof(*dmic_priv), GFP_KERNEL);
+ if (!dmic_priv)
+ return -ENOMEM;
+
+ ret = of_property_read_u32_array(np, "mediatek,dmic-mode",
+ &temps[0],
+ 1);
+ if (ret == 0)
+ dmic_priv->two_wire_mode = !!temps[0];
+
+ if (!dmic_priv->two_wire_mode) {
+ dmic_priv->clk_phase_sel_ch1 = 0;
+ dmic_priv->clk_phase_sel_ch2 = 4;
+ }
+
+ afe_priv->dai_priv[MT8365_AFE_IO_DMIC] = dmic_priv;
+ return 0;
+}
+
+int mt8365_dai_dmic_register(struct mtk_base_afe *afe)
+{
+ struct mtk_base_afe_dai *dai;
+
+ dai = devm_kzalloc(afe->dev, sizeof(*dai), GFP_KERNEL);
+ if (!dai)
+ return -ENOMEM;
+
+ list_add(&dai->list, &afe->sub_dais);
+ dai->dai_drivers = mtk_dai_dmic_driver;
+ dai->num_dai_drivers = ARRAY_SIZE(mtk_dai_dmic_driver);
+ dai->controls = mtk_dai_dmic_controls;
+ dai->num_controls = ARRAY_SIZE(mtk_dai_dmic_controls);
+ dai->dapm_widgets = mtk_dai_dmic_widgets;
+ dai->num_dapm_widgets = ARRAY_SIZE(mtk_dai_dmic_widgets);
+ dai->dapm_routes = mtk_dai_dmic_routes;
+ dai->num_dapm_routes = ARRAY_SIZE(mtk_dai_dmic_routes);
+ return init_dmic_priv_data(afe);
+}

--
2.25.1