Re: [v2 05/17] ASoC: mediatek: mt8186: support hw gain in platform driver

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Il 17/02/22 14:41, Jiaxin Yu ha scritto:
This path adds mt8186 hw gain dai driver.

Signed-off-by: Jiaxin Yu <jiaxin.yu@xxxxxxxxxxxx>
---
  .../soc/mediatek/mt8186/mt8186-dai-hw-gain.c  | 245 ++++++++++++++++++
  1 file changed, 245 insertions(+)
  create mode 100644 sound/soc/mediatek/mt8186/mt8186-dai-hw-gain.c

diff --git a/sound/soc/mediatek/mt8186/mt8186-dai-hw-gain.c b/sound/soc/mediatek/mt8186/mt8186-dai-hw-gain.c
new file mode 100644
index 000000000000..796878989727
--- /dev/null
+++ b/sound/soc/mediatek/mt8186/mt8186-dai-hw-gain.c
@@ -0,0 +1,245 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// MediaTek ALSA SoC Audio DAI HW Gain Control
+//
+// Copyright (c) 2022 MediaTek Inc.
+// Author: Jiaxin Yu <jiaxin.yu@xxxxxxxxxxxx>
+
+#include <linux/regmap.h>
+#include "mt8186-afe-common.h"
+#include "mt8186-interconnection.h"
+
+#define HW_GAIN_1_EN_W_NAME "HW GAIN 1 Enable"
+#define HW_GAIN_2_EN_W_NAME "HW GAIN 2 Enable"
+
+/* dai component */
+static const struct snd_kcontrol_new mtk_hw_gain1_in_ch1_mix[] = {
+	SOC_DAPM_SINGLE_AUTODISABLE("CONNSYS_I2S_CH1 Switch", AFE_CONN13_1,
+				    I_CONNSYS_I2S_CH1, 1, 0),
+};
+
+static const struct snd_kcontrol_new mtk_hw_gain1_in_ch2_mix[] = {
+	SOC_DAPM_SINGLE_AUTODISABLE("CONNSYS_I2S_CH2 Switch", AFE_CONN14_1,
+				    I_CONNSYS_I2S_CH2, 1, 0),
+};
+
+static const struct snd_kcontrol_new mtk_hw_gain2_in_ch1_mix[] = {
+	SOC_DAPM_SINGLE_AUTODISABLE("ADDA_UL_CH1 Switch", AFE_CONN15,
+				    I_ADDA_UL_CH1, 1, 0),
+};
+
+static const struct snd_kcontrol_new mtk_hw_gain2_in_ch2_mix[] = {
+	SOC_DAPM_SINGLE_AUTODISABLE("ADDA_UL_CH2 Switch", AFE_CONN16,
+				    I_ADDA_UL_CH2, 1, 0),
+};
+
+static int mtk_hw_gain_event(struct snd_soc_dapm_widget *w,
+			     struct snd_kcontrol *kcontrol,
+			     int event)
+{
+	struct snd_soc_component *cmpnt = snd_soc_dapm_to_component(w->dapm);
+	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt);
+	unsigned int gain_cur;
+	unsigned int gain_con1;
+
+	dev_dbg(cmpnt->dev, "%s(), name %s, event 0x%x\n",
+		__func__, w->name, event);
+
+	switch (event) {
+	case SND_SOC_DAPM_PRE_PMU:
+		if (strcmp(w->name, HW_GAIN_1_EN_W_NAME) == 0) {
+			gain_cur = AFE_GAIN1_CUR;
+			gain_con1 = AFE_GAIN1_CON1;
+		} else {
+			gain_cur = AFE_GAIN2_CUR;
+			gain_con1 = AFE_GAIN2_CON1;
+		}
+
+		/* let hw gain ramp up, set cur gain to 0 */
+		regmap_update_bits(afe->regmap,
+				   gain_cur,
+				   AFE_GAIN1_CUR_MASK_SFT,
+				   0);

This fits in one line (86 columns is ok)

+
+		/* set target gain to 0 */
+		regmap_update_bits(afe->regmap,
+				   gain_con1,
+				   GAIN1_TARGET_MASK_SFT,
+				   0);

Same here.

+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget mtk_dai_hw_gain_widgets[] = {
+	/* inter-connections */
+	SND_SOC_DAPM_MIXER("HW_GAIN1_IN_CH1", SND_SOC_NOPM, 0, 0,
+			   mtk_hw_gain1_in_ch1_mix,
+			   ARRAY_SIZE(mtk_hw_gain1_in_ch1_mix)),
+	SND_SOC_DAPM_MIXER("HW_GAIN1_IN_CH2", SND_SOC_NOPM, 0, 0,
+			   mtk_hw_gain1_in_ch2_mix,
+			   ARRAY_SIZE(mtk_hw_gain1_in_ch2_mix)),
+	SND_SOC_DAPM_MIXER("HW_GAIN2_IN_CH1", SND_SOC_NOPM, 0, 0,
+			   mtk_hw_gain2_in_ch1_mix,
+			   ARRAY_SIZE(mtk_hw_gain2_in_ch1_mix)),
+	SND_SOC_DAPM_MIXER("HW_GAIN2_IN_CH2", SND_SOC_NOPM, 0, 0,
+			   mtk_hw_gain2_in_ch2_mix,
+			   ARRAY_SIZE(mtk_hw_gain2_in_ch2_mix)),
+
+	SND_SOC_DAPM_SUPPLY(HW_GAIN_1_EN_W_NAME,
+			    AFE_GAIN1_CON0, GAIN1_ON_SFT, 0,
+			    mtk_hw_gain_event,
+			    SND_SOC_DAPM_PRE_PMU),
+
+	SND_SOC_DAPM_SUPPLY(HW_GAIN_2_EN_W_NAME,
+			    AFE_GAIN2_CON0, GAIN2_ON_SFT, 0,
+			    mtk_hw_gain_event,
+			    SND_SOC_DAPM_PRE_PMU),
+
+	SND_SOC_DAPM_INPUT("HW Gain 1 Out Endpoint"),
+	SND_SOC_DAPM_INPUT("HW Gain 2 Out Endpoint"),
+	SND_SOC_DAPM_OUTPUT("HW Gain 1 In Endpoint"),
+};
+
+static const struct snd_soc_dapm_route mtk_dai_hw_gain_routes[] = {
+	{"HW Gain 1 In", NULL, "HW_GAIN1_IN_CH1"},
+	{"HW Gain 1 In", NULL, "HW_GAIN1_IN_CH2"},
+	{"HW Gain 2 In", NULL, "HW_GAIN2_IN_CH1"},
+	{"HW Gain 2 In", NULL, "HW_GAIN2_IN_CH2"},
+
+	{"HW Gain 1 In", NULL, HW_GAIN_1_EN_W_NAME},
+	{"HW Gain 1 Out", NULL, HW_GAIN_1_EN_W_NAME},
+	{"HW Gain 2 In", NULL, HW_GAIN_2_EN_W_NAME},
+	{"HW Gain 2 Out", NULL, HW_GAIN_2_EN_W_NAME},
+
+	{"HW Gain 1 In Endpoint", NULL, "HW Gain 1 In"},
+	{"HW Gain 1 Out", NULL, "HW Gain 1 Out Endpoint"},
+	{"HW Gain 2 Out", NULL, "HW Gain 2 Out Endpoint"},
+};
+
+static const struct snd_kcontrol_new mtk_hw_gain_controls[] = {
+	SOC_SINGLE("HW Gain 1 Volume", AFE_GAIN1_CON1,
+		   GAIN1_TARGET_SFT, GAIN1_TARGET_MASK, 0),
+	SOC_SINGLE("HW Gain 2 Volume", AFE_GAIN2_CON1,
+		   GAIN2_TARGET_SFT, GAIN2_TARGET_MASK, 0),
+};
+
+/* dai ops */
+static int mtk_dai_gain_hw_params(struct snd_pcm_substream *substream,
+				  struct snd_pcm_hw_params *params,
+				  struct snd_soc_dai *dai)
+{
+	struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+	unsigned int rate = params_rate(params);
+	unsigned int rate_reg = mt8186_rate_transform(afe->dev, rate, dai->id);
+
+	dev_info(afe->dev, "%s(), id %d, stream %d, rate %d\n",
+		 __func__,
+		 dai->id,
+		 substream->stream,
+		 rate);

This should be:
	dev_info(afe->dev, "%s(), id %d, stream %d, rate %d\n",

		 __func__, dai->id, substream->stream, rate);




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