ASoC: mt6797: add Hostless DAI

add path for hosltess lpbk from ADDA Capture to ADDA Playback
add path for hostless phone call between ADDA DAI and PCM DAI

Signed-off-by: KaiChieh Chuang <kaichieh.chuang@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/mediatek/mt6797/Makefile

@@ -5,6 +5,7 @@ snd-soc-mt6797-afe-objs := \
 	mt6797-afe-pcm.o \
 	mt6797-afe-clk.o \
 	mt6797-dai-pcm.o \
+	mt6797-dai-hostless.o \
 	mt6797-dai-adda.o
 
 obj-$(CONFIG_SND_SOC_MT6797) += snd-soc-mt6797-afe.o

sound/soc/mediatek/mt6797/mt6797-afe-common.h

@@ -26,6 +26,8 @@ enum {
 	MT6797_DAI_ADDA = MT6797_MEMIF_NUM,
 	MT6797_DAI_PCM_1,
 	MT6797_DAI_PCM_2,
+	MT6797_DAI_HOSTLESS_LPBK,
+	MT6797_DAI_HOSTLESS_SPEECH,
 	MT6797_DAI_NUM,
 };
 
@@ -52,4 +54,5 @@ unsigned int mt6797_rate_transform(struct device *dev,
 /* dai register */
 int mt6797_dai_adda_register(struct mtk_base_afe *afe);
 int mt6797_dai_pcm_register(struct mtk_base_afe *afe);
+int mt6797_dai_hostless_register(struct mtk_base_afe *afe);
 #endif

sound/soc/mediatek/mt6797/mt6797-afe-pcm.c

@@ -820,6 +820,7 @@ static int mt6797_afe_pcm_dev_probe(struct platform_device *pdev)
 
 	mt6797_dai_adda_register(afe);
 	mt6797_dai_pcm_register(afe);
+	mt6797_dai_hostless_register(afe);
 
 	afe->sub_dais[MT6797_MEMIF_DL1].dai_drivers = mt6797_memif_dai_driver;
 	afe->sub_dais[MT6797_MEMIF_DL1].num_dai_drivers =

sound/soc/mediatek/mt6797/mt6797-dai-adda.c

@@ -100,6 +100,10 @@ static const struct snd_kcontrol_new mtk_adda_dl_ch1_mix[] = {
 				    I_ADDA_UL_CH2, 1, 0),
 	SOC_DAPM_SINGLE_AUTODISABLE("ADDA_UL_CH1", AFE_CONN3,
 				    I_ADDA_UL_CH1, 1, 0),
+	SOC_DAPM_SINGLE_AUTODISABLE("PCM_1_CAP_CH1", AFE_CONN3,
+				    I_PCM_1_CAP_CH1, 1, 0),
+	SOC_DAPM_SINGLE_AUTODISABLE("PCM_2_CAP_CH1", AFE_CONN3,
+				    I_PCM_2_CAP_CH1, 1, 0),
 };
 
 static const struct snd_kcontrol_new mtk_adda_dl_ch2_mix[] = {
@@ -113,6 +117,14 @@ static const struct snd_kcontrol_new mtk_adda_dl_ch2_mix[] = {
 				    I_ADDA_UL_CH2, 1, 0),
 	SOC_DAPM_SINGLE_AUTODISABLE("ADDA_UL_CH1", AFE_CONN4,
 				    I_ADDA_UL_CH1, 1, 0),
+	SOC_DAPM_SINGLE_AUTODISABLE("PCM_1_CAP_CH1", AFE_CONN4,
+				    I_PCM_1_CAP_CH1, 1, 0),
+	SOC_DAPM_SINGLE_AUTODISABLE("PCM_2_CAP_CH1", AFE_CONN4,
+				    I_PCM_2_CAP_CH1, 1, 0),
+	SOC_DAPM_SINGLE_AUTODISABLE("PCM_1_CAP_CH2", AFE_CONN4,
+				    I_PCM_1_CAP_CH2, 1, 0),
+	SOC_DAPM_SINGLE_AUTODISABLE("PCM_2_CAP_CH2", AFE_CONN4,
+				    I_PCM_2_CAP_CH2, 1, 0),
 };
 
 static int mtk_adda_ul_event(struct snd_soc_dapm_widget *w,

sound/soc/mediatek/mt6797/mt6797-dai-hostless.c

@@ -0,0 +1,112 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// MediaTek ALSA SoC Audio DAI Hostless Control
+//
+// Copyright (c) 2018 MediaTek Inc.
+// Author: KaiChieh Chuang <kaichieh.chuang@mediatek.com>
+
+#include "mt6797-afe-common.h"
+
+/* dai component */
+static const struct snd_soc_dapm_route mtk_dai_hostless_routes[] = {
+	/* Hostless ADDA Loopback */
+	{"ADDA_DL_CH1", "ADDA_UL_CH1", "Hostless LPBK DL"},
+	{"ADDA_DL_CH1", "ADDA_UL_CH2", "Hostless LPBK DL"},
+	{"ADDA_DL_CH2", "ADDA_UL_CH1", "Hostless LPBK DL"},
+	{"ADDA_DL_CH2", "ADDA_UL_CH2", "Hostless LPBK DL"},
+	{"Hostless LPBK UL", NULL, "ADDA Capture"},
+
+	/* Hostless Speech */
+	{"ADDA_DL_CH1", "PCM_1_CAP_CH1", "Hostless Speech DL"},
+	{"ADDA_DL_CH2", "PCM_1_CAP_CH1", "Hostless Speech DL"},
+	{"ADDA_DL_CH2", "PCM_1_CAP_CH2", "Hostless Speech DL"},
+	{"ADDA_DL_CH1", "PCM_2_CAP_CH1", "Hostless Speech DL"},
+	{"ADDA_DL_CH2", "PCM_2_CAP_CH1", "Hostless Speech DL"},
+	{"ADDA_DL_CH2", "PCM_2_CAP_CH2", "Hostless Speech DL"},
+	{"PCM_1_PB_CH1", "ADDA_UL_CH1", "Hostless Speech DL"},
+	{"PCM_1_PB_CH2", "ADDA_UL_CH2", "Hostless Speech DL"},
+	{"PCM_2_PB_CH1", "ADDA_UL_CH1", "Hostless Speech DL"},
+	{"PCM_2_PB_CH2", "ADDA_UL_CH2", "Hostless Speech DL"},
+
+	{"Hostless Speech UL", NULL, "PCM 1 Capture"},
+	{"Hostless Speech UL", NULL, "PCM 2 Capture"},
+	{"Hostless Speech UL", NULL, "ADDA Capture"},
+};
+
+/* dai ops */
+static int mtk_dai_hostless_startup(struct snd_pcm_substream *substream,
+				    struct snd_soc_dai *dai)
+{
+	struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
+
+	return snd_soc_set_runtime_hwparams(substream, afe->mtk_afe_hardware);
+}
+
+static const struct snd_soc_dai_ops mtk_dai_hostless_ops = {
+	.startup = mtk_dai_hostless_startup,
+};
+
+/* dai driver */
+#define MTK_HOSTLESS_RATES (SNDRV_PCM_RATE_8000_48000 |\
+			   SNDRV_PCM_RATE_88200 |\
+			   SNDRV_PCM_RATE_96000 |\
+			   SNDRV_PCM_RATE_176400 |\
+			   SNDRV_PCM_RATE_192000)
+
+#define MTK_HOSTLESS_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
+			     SNDRV_PCM_FMTBIT_S24_LE |\
+			     SNDRV_PCM_FMTBIT_S32_LE)
+
+static struct snd_soc_dai_driver mtk_dai_hostless_driver[] = {
+	{
+		.name = "Hostless LPBK DAI",
+		.id = MT6797_DAI_HOSTLESS_LPBK,
+		.playback = {
+			.stream_name = "Hostless LPBK DL",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = MTK_HOSTLESS_RATES,
+			.formats = MTK_HOSTLESS_FORMATS,
+		},
+		.capture = {
+			.stream_name = "Hostless LPBK UL",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = MTK_HOSTLESS_RATES,
+			.formats = MTK_HOSTLESS_FORMATS,
+		},
+		.ops = &mtk_dai_hostless_ops,
+	},
+	{
+		.name = "Hostless Speech DAI",
+		.id = MT6797_DAI_HOSTLESS_SPEECH,
+		.playback = {
+			.stream_name = "Hostless Speech DL",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = MTK_HOSTLESS_RATES,
+			.formats = MTK_HOSTLESS_FORMATS,
+		},
+		.capture = {
+			.stream_name = "Hostless Speech UL",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = MTK_HOSTLESS_RATES,
+			.formats = MTK_HOSTLESS_FORMATS,
+		},
+		.ops = &mtk_dai_hostless_ops,
+	},
+};
+
+int mt6797_dai_hostless_register(struct mtk_base_afe *afe)
+{
+	int id = MT6797_DAI_HOSTLESS_LPBK;
+
+	afe->sub_dais[id].dai_drivers = mtk_dai_hostless_driver;
+	afe->sub_dais[id].num_dai_drivers = ARRAY_SIZE(mtk_dai_hostless_driver);
+
+	afe->sub_dais[id].dapm_routes = mtk_dai_hostless_routes;
+	afe->sub_dais[id].num_dapm_routes = ARRAY_SIZE(mtk_dai_hostless_routes);
+
+	return 0;
+}