1// SPDX-License-Identifier: GPL-2.0
2//
3// MediaTek ALSA SoC Audio DAI HW Gain Control
4//
5// Copyright (c) 2022 MediaTek Inc.
6// Author: Jiaxin Yu <jiaxin.yu@mediatek.com>
7
8#include <linux/regmap.h>
9#include "mt8186-afe-common.h"
10#include "mt8186-interconnection.h"
11
12#define HW_GAIN_1_EN_W_NAME "HW GAIN 1 Enable"
13#define HW_GAIN_2_EN_W_NAME "HW GAIN 2 Enable"
14
15/* dai component */
16static const struct snd_kcontrol_new mtk_hw_gain1_in_ch1_mix[] = {
17 SOC_DAPM_SINGLE_AUTODISABLE("CONNSYS_I2S_CH1 Switch", AFE_CONN13_1,
18 I_CONNSYS_I2S_CH1, 1, 0),
19};
20
21static const struct snd_kcontrol_new mtk_hw_gain1_in_ch2_mix[] = {
22 SOC_DAPM_SINGLE_AUTODISABLE("CONNSYS_I2S_CH2 Switch", AFE_CONN14_1,
23 I_CONNSYS_I2S_CH2, 1, 0),
24};
25
26static const struct snd_kcontrol_new mtk_hw_gain2_in_ch1_mix[] = {
27 SOC_DAPM_SINGLE_AUTODISABLE("ADDA_UL_CH1 Switch", AFE_CONN15,
28 I_ADDA_UL_CH1, 1, 0),
29};
30
31static const struct snd_kcontrol_new mtk_hw_gain2_in_ch2_mix[] = {
32 SOC_DAPM_SINGLE_AUTODISABLE("ADDA_UL_CH2 Switch", AFE_CONN16,
33 I_ADDA_UL_CH2, 1, 0),
34};
35
36static int mtk_hw_gain_event(struct snd_soc_dapm_widget *w,
37 struct snd_kcontrol *kcontrol,
38 int event)
39{
40 struct snd_soc_component *cmpnt = snd_soc_dapm_to_component(dapm: w->dapm);
41 struct mtk_base_afe *afe = snd_soc_component_get_drvdata(c: cmpnt);
42 unsigned int gain_cur;
43 unsigned int gain_con1;
44
45 dev_dbg(cmpnt->dev, "%s(), name %s, event 0x%x\n",
46 __func__, w->name, event);
47
48 switch (event) {
49 case SND_SOC_DAPM_PRE_PMU:
50 if (snd_soc_dapm_widget_name_cmp(widget: w, HW_GAIN_1_EN_W_NAME) == 0) {
51 gain_cur = AFE_GAIN1_CUR;
52 gain_con1 = AFE_GAIN1_CON1;
53 } else {
54 gain_cur = AFE_GAIN2_CUR;
55 gain_con1 = AFE_GAIN2_CON1;
56 }
57
58 /* let hw gain ramp up, set cur gain to 0 */
59 regmap_update_bits(map: afe->regmap, reg: gain_cur, AFE_GAIN1_CUR_MASK_SFT, val: 0);
60
61 /* set target gain to 0 */
62 regmap_update_bits(map: afe->regmap, reg: gain_con1, GAIN1_TARGET_MASK_SFT, val: 0);
63 break;
64 default:
65 break;
66 }
67
68 return 0;
69}
70
71static const struct snd_soc_dapm_widget mtk_dai_hw_gain_widgets[] = {
72 /* inter-connections */
73 SND_SOC_DAPM_MIXER("HW_GAIN1_IN_CH1", SND_SOC_NOPM, 0, 0,
74 mtk_hw_gain1_in_ch1_mix,
75 ARRAY_SIZE(mtk_hw_gain1_in_ch1_mix)),
76 SND_SOC_DAPM_MIXER("HW_GAIN1_IN_CH2", SND_SOC_NOPM, 0, 0,
77 mtk_hw_gain1_in_ch2_mix,
78 ARRAY_SIZE(mtk_hw_gain1_in_ch2_mix)),
79 SND_SOC_DAPM_MIXER("HW_GAIN2_IN_CH1", SND_SOC_NOPM, 0, 0,
80 mtk_hw_gain2_in_ch1_mix,
81 ARRAY_SIZE(mtk_hw_gain2_in_ch1_mix)),
82 SND_SOC_DAPM_MIXER("HW_GAIN2_IN_CH2", SND_SOC_NOPM, 0, 0,
83 mtk_hw_gain2_in_ch2_mix,
84 ARRAY_SIZE(mtk_hw_gain2_in_ch2_mix)),
85
86 SND_SOC_DAPM_SUPPLY(HW_GAIN_1_EN_W_NAME,
87 AFE_GAIN1_CON0, GAIN1_ON_SFT, 0,
88 mtk_hw_gain_event,
89 SND_SOC_DAPM_PRE_PMU),
90
91 SND_SOC_DAPM_SUPPLY(HW_GAIN_2_EN_W_NAME,
92 AFE_GAIN2_CON0, GAIN2_ON_SFT, 0,
93 mtk_hw_gain_event,
94 SND_SOC_DAPM_PRE_PMU),
95
96 SND_SOC_DAPM_INPUT("HW Gain 1 Out Endpoint"),
97 SND_SOC_DAPM_INPUT("HW Gain 2 Out Endpoint"),
98 SND_SOC_DAPM_OUTPUT("HW Gain 1 In Endpoint"),
99};
100
101static const struct snd_soc_dapm_route mtk_dai_hw_gain_routes[] = {
102 {"HW Gain 1 In", NULL, "HW_GAIN1_IN_CH1"},
103 {"HW Gain 1 In", NULL, "HW_GAIN1_IN_CH2"},
104 {"HW Gain 2 In", NULL, "HW_GAIN2_IN_CH1"},
105 {"HW Gain 2 In", NULL, "HW_GAIN2_IN_CH2"},
106
107 {"HW Gain 1 In", NULL, HW_GAIN_1_EN_W_NAME},
108 {"HW Gain 1 Out", NULL, HW_GAIN_1_EN_W_NAME},
109 {"HW Gain 2 In", NULL, HW_GAIN_2_EN_W_NAME},
110 {"HW Gain 2 Out", NULL, HW_GAIN_2_EN_W_NAME},
111
112 {"HW Gain 1 In Endpoint", NULL, "HW Gain 1 In"},
113 {"HW Gain 1 Out", NULL, "HW Gain 1 Out Endpoint"},
114 {"HW Gain 2 Out", NULL, "HW Gain 2 Out Endpoint"},
115};
116
117static const struct snd_kcontrol_new mtk_hw_gain_controls[] = {
118 SOC_SINGLE("HW Gain 1 Volume", AFE_GAIN1_CON1,
119 GAIN1_TARGET_SFT, GAIN1_TARGET_MASK, 0),
120 SOC_SINGLE("HW Gain 2 Volume", AFE_GAIN2_CON1,
121 GAIN2_TARGET_SFT, GAIN2_TARGET_MASK, 0),
122};
123
124/* dai ops */
125static int mtk_dai_gain_hw_params(struct snd_pcm_substream *substream,
126 struct snd_pcm_hw_params *params,
127 struct snd_soc_dai *dai)
128{
129 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
130 unsigned int rate = params_rate(p: params);
131 unsigned int rate_reg = mt8186_rate_transform(dev: afe->dev, rate, aud_blk: dai->id);
132
133 dev_dbg(afe->dev, "%s(), id %d, stream %d, rate %d\n",
134 __func__, dai->id, substream->stream, rate);
135
136 /* rate */
137 regmap_update_bits(map: afe->regmap,
138 reg: dai->id == MT8186_DAI_HW_GAIN_1 ?
139 AFE_GAIN1_CON0 : AFE_GAIN2_CON0,
140 GAIN1_MODE_MASK_SFT,
141 val: rate_reg << GAIN1_MODE_SFT);
142
143 /* sample per step */
144 regmap_update_bits(map: afe->regmap,
145 reg: dai->id == MT8186_DAI_HW_GAIN_1 ?
146 AFE_GAIN1_CON0 : AFE_GAIN2_CON0,
147 GAIN1_SAMPLE_PER_STEP_MASK_SFT,
148 val: (dai->id == MT8186_DAI_HW_GAIN_1 ? 0x40 : 0x0) <<
149 GAIN1_SAMPLE_PER_STEP_SFT);
150
151 return 0;
152}
153
154static const struct snd_soc_dai_ops mtk_dai_gain_ops = {
155 .hw_params = mtk_dai_gain_hw_params,
156};
157
158/* dai driver */
159#define MTK_HW_GAIN_RATES (SNDRV_PCM_RATE_8000_48000 |\
160 SNDRV_PCM_RATE_88200 |\
161 SNDRV_PCM_RATE_96000 |\
162 SNDRV_PCM_RATE_176400 |\
163 SNDRV_PCM_RATE_192000)
164
165#define MTK_HW_GAIN_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
166 SNDRV_PCM_FMTBIT_S24_LE |\
167 SNDRV_PCM_FMTBIT_S32_LE)
168
169static struct snd_soc_dai_driver mtk_dai_gain_driver[] = {
170 {
171 .name = "HW Gain 1",
172 .id = MT8186_DAI_HW_GAIN_1,
173 .playback = {
174 .stream_name = "HW Gain 1 In",
175 .channels_min = 1,
176 .channels_max = 2,
177 .rates = MTK_HW_GAIN_RATES,
178 .formats = MTK_HW_GAIN_FORMATS,
179 },
180 .capture = {
181 .stream_name = "HW Gain 1 Out",
182 .channels_min = 1,
183 .channels_max = 2,
184 .rates = MTK_HW_GAIN_RATES,
185 .formats = MTK_HW_GAIN_FORMATS,
186 },
187 .ops = &mtk_dai_gain_ops,
188 .symmetric_rate = 1,
189 .symmetric_channels = 1,
190 .symmetric_sample_bits = 1,
191 },
192 {
193 .name = "HW Gain 2",
194 .id = MT8186_DAI_HW_GAIN_2,
195 .playback = {
196 .stream_name = "HW Gain 2 In",
197 .channels_min = 1,
198 .channels_max = 2,
199 .rates = MTK_HW_GAIN_RATES,
200 .formats = MTK_HW_GAIN_FORMATS,
201 },
202 .capture = {
203 .stream_name = "HW Gain 2 Out",
204 .channels_min = 1,
205 .channels_max = 2,
206 .rates = MTK_HW_GAIN_RATES,
207 .formats = MTK_HW_GAIN_FORMATS,
208 },
209 .ops = &mtk_dai_gain_ops,
210 .symmetric_rate = 1,
211 .symmetric_channels = 1,
212 .symmetric_sample_bits = 1,
213 },
214};
215
216int mt8186_dai_hw_gain_register(struct mtk_base_afe *afe)
217{
218 struct mtk_base_afe_dai *dai;
219
220 dai = devm_kzalloc(dev: afe->dev, size: sizeof(*dai), GFP_KERNEL);
221 if (!dai)
222 return -ENOMEM;
223
224 list_add(new: &dai->list, head: &afe->sub_dais);
225
226 dai->dai_drivers = mtk_dai_gain_driver;
227 dai->num_dai_drivers = ARRAY_SIZE(mtk_dai_gain_driver);
228
229 dai->controls = mtk_hw_gain_controls;
230 dai->num_controls = ARRAY_SIZE(mtk_hw_gain_controls);
231 dai->dapm_widgets = mtk_dai_hw_gain_widgets;
232 dai->num_dapm_widgets = ARRAY_SIZE(mtk_dai_hw_gain_widgets);
233 dai->dapm_routes = mtk_dai_hw_gain_routes;
234 dai->num_dapm_routes = ARRAY_SIZE(mtk_dai_hw_gain_routes);
235 return 0;
236}
237

source code of linux/sound/soc/mediatek/mt8186/mt8186-dai-hw-gain.c