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Message-Id: <20201001021148.15852-8-samuel@sholland.org>
Date:   Wed, 30 Sep 2020 21:11:30 -0500
From:   Samuel Holland <samuel@...lland.org>
To:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>, Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>
Cc:     Ondrej Jirman <megous@...ous.com>, alsa-devel@...a-project.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Samuel Holland <samuel@...lland.org>
Subject: [PATCH 07/25] ASoC: sun8i-codec: Enable AIF mono/stereo control

Each left/right pair of AIF input/output channels can be swapped or
combined. This is useful for sending a mono audio source to both sides
of a stereo sink, or for creating complex mixing scenarios.

Add the support to control this feature from userspace.

Signed-off-by: Samuel Holland <samuel@...lland.org>
---
 sound/soc/sunxi/sun8i-codec.c | 82 ++++++++++++++++++++++++++++++++---
 1 file changed, 76 insertions(+), 6 deletions(-)

diff --git a/sound/soc/sunxi/sun8i-codec.c b/sound/soc/sunxi/sun8i-codec.c
index 2c89974243e1..578c0c0e6330 100644
--- a/sound/soc/sunxi/sun8i-codec.c
+++ b/sound/soc/sunxi/sun8i-codec.c
@@ -49,19 +49,23 @@
 #define SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV		9
 #define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV		6
 #define SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ		4
 #define SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ_16		(1 << 4)
 #define SUN8I_AIF1CLK_CTRL_AIF1_DATA_FMT		2
 #define SUN8I_AIF1_ADCDAT_CTRL				0x044
 #define SUN8I_AIF1_ADCDAT_CTRL_AIF1_AD0L_ENA		15
 #define SUN8I_AIF1_ADCDAT_CTRL_AIF1_AD0R_ENA		14
+#define SUN8I_AIF1_ADCDAT_CTRL_AIF1_AD0L_SRC		10
+#define SUN8I_AIF1_ADCDAT_CTRL_AIF1_AD0R_SRC		8
 #define SUN8I_AIF1_DACDAT_CTRL				0x048
 #define SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0L_ENA		15
 #define SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0R_ENA		14
+#define SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0L_SRC		10
+#define SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0R_SRC		8
 #define SUN8I_AIF1_MXR_SRC				0x04c
 #define SUN8I_AIF1_MXR_SRC_AD0L_MXR_SRC_AIF1DA0L	15
 #define SUN8I_AIF1_MXR_SRC_AD0L_MXR_SRC_AIF2DACL	14
 #define SUN8I_AIF1_MXR_SRC_AD0L_MXR_SRC_ADCL		13
 #define SUN8I_AIF1_MXR_SRC_AD0L_MXR_SRC_AIF2DACR	12
 #define SUN8I_AIF1_MXR_SRC_AD0R_MXR_SRC_AIF1DA0R	11
 #define SUN8I_AIF1_MXR_SRC_AD0R_MXR_SRC_AIF2DACR	10
 #define SUN8I_AIF1_MXR_SRC_AD0R_MXR_SRC_ADCR		9
@@ -327,16 +331,30 @@ static int sun8i_codec_hw_params(struct snd_pcm_substream *substream,
 
 	regmap_update_bits(scodec->regmap, SUN8I_SYS_SR_CTRL,
 			   SUN8I_SYS_SR_CTRL_AIF1_FS_MASK,
 			   sample_rate << SUN8I_SYS_SR_CTRL_AIF1_FS);
 
 	return 0;
 }
 
+static const char *const sun8i_aif_stereo_mux_enum_values[] = {
+	"Stereo", "Reverse Stereo", "Sum Mono", "Mix Mono"
+};
+
+static SOC_ENUM_DOUBLE_DECL(sun8i_aif1_ad0_stereo_mux_enum,
+			    SUN8I_AIF1_ADCDAT_CTRL,
+			    SUN8I_AIF1_ADCDAT_CTRL_AIF1_AD0L_SRC,
+			    SUN8I_AIF1_ADCDAT_CTRL_AIF1_AD0R_SRC,
+			    sun8i_aif_stereo_mux_enum_values);
+
+static const struct snd_kcontrol_new sun8i_aif1_ad0_stereo_mux_control =
+	SOC_DAPM_ENUM("AIF1 AD0 Stereo Capture Route",
+		      sun8i_aif1_ad0_stereo_mux_enum);
+
 static const struct snd_kcontrol_new sun8i_aif1_ad0_mixer_controls[] = {
 	SOC_DAPM_DOUBLE("AIF1 Slot 0 Digital ADC Capture Switch",
 			SUN8I_AIF1_MXR_SRC,
 			SUN8I_AIF1_MXR_SRC_AD0L_MXR_SRC_AIF1DA0L,
 			SUN8I_AIF1_MXR_SRC_AD0R_MXR_SRC_AIF1DA0R, 1, 0),
 	SOC_DAPM_DOUBLE("AIF2 Digital ADC Capture Switch",
 			SUN8I_AIF1_MXR_SRC,
 			SUN8I_AIF1_MXR_SRC_AD0L_MXR_SRC_AIF2DACL,
@@ -346,16 +364,26 @@ static const struct snd_kcontrol_new sun8i_aif1_ad0_mixer_controls[] = {
 			SUN8I_AIF1_MXR_SRC_AD0L_MXR_SRC_ADCL,
 			SUN8I_AIF1_MXR_SRC_AD0R_MXR_SRC_ADCR, 1, 0),
 	SOC_DAPM_DOUBLE("AIF2 Inv Digital ADC Capture Switch",
 			SUN8I_AIF1_MXR_SRC,
 			SUN8I_AIF1_MXR_SRC_AD0L_MXR_SRC_AIF2DACR,
 			SUN8I_AIF1_MXR_SRC_AD0R_MXR_SRC_AIF2DACL, 1, 0),
 };
 
+static SOC_ENUM_DOUBLE_DECL(sun8i_aif1_da0_stereo_mux_enum,
+			    SUN8I_AIF1_DACDAT_CTRL,
+			    SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0L_SRC,
+			    SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0R_SRC,
+			    sun8i_aif_stereo_mux_enum_values);
+
+static const struct snd_kcontrol_new sun8i_aif1_da0_stereo_mux_control =
+	SOC_DAPM_ENUM("AIF1 DA0 Stereo Playback Route",
+		      sun8i_aif1_da0_stereo_mux_enum);
+
 static const struct snd_kcontrol_new sun8i_dac_mixer_controls[] = {
 	SOC_DAPM_DOUBLE("AIF1 Slot 0 Digital DAC Playback Switch",
 			SUN8I_DAC_MXR_SRC,
 			SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_AIF1DA0L,
 			SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF1DA0R, 1, 0),
 	SOC_DAPM_DOUBLE("AIF1 Slot 1 Digital DAC Playback Switch",
 			SUN8I_DAC_MXR_SRC,
 			SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_AIF1DA1L,
@@ -412,22 +440,34 @@ static const struct snd_soc_dapm_widget sun8i_codec_dapm_widgets[] = {
 	/* AIF "ADC" Outputs */
 	SND_SOC_DAPM_AIF_OUT("AIF1 AD0L", "Capture", 0,
 			     SUN8I_AIF1_ADCDAT_CTRL,
 			     SUN8I_AIF1_ADCDAT_CTRL_AIF1_AD0L_ENA, 0),
 	SND_SOC_DAPM_AIF_OUT("AIF1 AD0R", "Capture", 1,
 			     SUN8I_AIF1_ADCDAT_CTRL,
 			     SUN8I_AIF1_ADCDAT_CTRL_AIF1_AD0R_ENA, 0),
 
+	/* AIF "ADC" Mono/Stereo Muxes */
+	SND_SOC_DAPM_MUX("AIF1 AD0L Stereo Mux", SND_SOC_NOPM, 0, 0,
+			 &sun8i_aif1_ad0_stereo_mux_control),
+	SND_SOC_DAPM_MUX("AIF1 AD0R Stereo Mux", SND_SOC_NOPM, 0, 0,
+			 &sun8i_aif1_ad0_stereo_mux_control),
+
 	/* AIF "ADC" Mixers */
 	SOC_MIXER_ARRAY("AIF1 AD0L Mixer", SND_SOC_NOPM, 0, 0,
 			sun8i_aif1_ad0_mixer_controls),
 	SOC_MIXER_ARRAY("AIF1 AD0R Mixer", SND_SOC_NOPM, 0, 0,
 			sun8i_aif1_ad0_mixer_controls),
 
+	/* AIF "DAC" Mono/Stereo Muxes */
+	SND_SOC_DAPM_MUX("AIF1 DA0L Stereo Mux", SND_SOC_NOPM, 0, 0,
+			 &sun8i_aif1_da0_stereo_mux_control),
+	SND_SOC_DAPM_MUX("AIF1 DA0R Stereo Mux", SND_SOC_NOPM, 0, 0,
+			 &sun8i_aif1_da0_stereo_mux_control),
+
 	/* AIF "DAC" Inputs */
 	SND_SOC_DAPM_AIF_IN("AIF1 DA0L", "Playback", 0,
 			    SUN8I_AIF1_DACDAT_CTRL,
 			    SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0L_ENA, 0),
 	SND_SOC_DAPM_AIF_IN("AIF1 DA0R", "Playback", 1,
 			    SUN8I_AIF1_DACDAT_CTRL,
 			    SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0R_ENA, 0),
 
@@ -468,35 +508,65 @@ static const struct snd_soc_dapm_route sun8i_codec_dapm_routes[] = {
 
 	{ "CLK DAC", NULL, "SYSCLK" },
 	{ "RST DAC", NULL, "CLK DAC" },
 	{ "DAC", NULL, "RST DAC" },
 	{ "DACL", NULL, "DAC" },
 	{ "DACR", NULL, "DAC" },
 
 	/* AIF "ADC" Output Routes */
-	{ "AIF1 AD0L", NULL, "AIF1 AD0L Mixer" },
-	{ "AIF1 AD0R", NULL, "AIF1 AD0R Mixer" },
+	{ "AIF1 AD0L", NULL, "AIF1 AD0L Stereo Mux" },
+	{ "AIF1 AD0R", NULL, "AIF1 AD0R Stereo Mux" },
+
+	/* AIF "ADC" Mono/Stereo Mux Routes */
+	{ "AIF1 AD0L Stereo Mux", "Stereo", "AIF1 AD0L Mixer" },
+	{ "AIF1 AD0L Stereo Mux", "Reverse Stereo", "AIF1 AD0R Mixer" },
+	{ "AIF1 AD0L Stereo Mux", "Sum Mono", "AIF1 AD0L Mixer" },
+	{ "AIF1 AD0L Stereo Mux", "Sum Mono", "AIF1 AD0R Mixer" },
+	{ "AIF1 AD0L Stereo Mux", "Mix Mono", "AIF1 AD0L Mixer" },
+	{ "AIF1 AD0L Stereo Mux", "Mix Mono", "AIF1 AD0R Mixer" },
+
+	{ "AIF1 AD0R Stereo Mux", "Stereo", "AIF1 AD0R Mixer" },
+	{ "AIF1 AD0R Stereo Mux", "Reverse Stereo", "AIF1 AD0L Mixer" },
+	{ "AIF1 AD0R Stereo Mux", "Sum Mono", "AIF1 AD0L Mixer" },
+	{ "AIF1 AD0R Stereo Mux", "Sum Mono", "AIF1 AD0R Mixer" },
+	{ "AIF1 AD0R Stereo Mux", "Mix Mono", "AIF1 AD0L Mixer" },
+	{ "AIF1 AD0R Stereo Mux", "Mix Mono", "AIF1 AD0R Mixer" },
 
 	/* AIF "ADC" Mixer Routes */
-	{ "AIF1 AD0L Mixer", "AIF1 Slot 0 Digital ADC Capture Switch", "AIF1 DA0L" },
+	{ "AIF1 AD0L Mixer", "AIF1 Slot 0 Digital ADC Capture Switch", "AIF1 DA0L Stereo Mux" },
 	{ "AIF1 AD0L Mixer", "AIF1 Data Digital ADC Capture Switch", "ADCL" },
 
-	{ "AIF1 AD0R Mixer", "AIF1 Slot 0 Digital ADC Capture Switch", "AIF1 DA0R" },
+	{ "AIF1 AD0R Mixer", "AIF1 Slot 0 Digital ADC Capture Switch", "AIF1 DA0R Stereo Mux" },
 	{ "AIF1 AD0R Mixer", "AIF1 Data Digital ADC Capture Switch", "ADCR" },
 
+	/* AIF "DAC" Mono/Stereo Mux Routes */
+	{ "AIF1 DA0L Stereo Mux", "Stereo", "AIF1 DA0L" },
+	{ "AIF1 DA0L Stereo Mux", "Reverse Stereo", "AIF1 DA0R" },
+	{ "AIF1 DA0L Stereo Mux", "Sum Mono", "AIF1 DA0L" },
+	{ "AIF1 DA0L Stereo Mux", "Sum Mono", "AIF1 DA0R" },
+	{ "AIF1 DA0L Stereo Mux", "Mix Mono", "AIF1 DA0L" },
+	{ "AIF1 DA0L Stereo Mux", "Mix Mono", "AIF1 DA0R" },
+
+	{ "AIF1 DA0R Stereo Mux", "Stereo", "AIF1 DA0R" },
+	{ "AIF1 DA0R Stereo Mux", "Reverse Stereo", "AIF1 DA0L" },
+	{ "AIF1 DA0R Stereo Mux", "Sum Mono", "AIF1 DA0L" },
+	{ "AIF1 DA0R Stereo Mux", "Sum Mono", "AIF1 DA0R" },
+	{ "AIF1 DA0R Stereo Mux", "Mix Mono", "AIF1 DA0L" },
+	{ "AIF1 DA0R Stereo Mux", "Mix Mono", "AIF1 DA0R" },
+
 	/* DAC Output Routes */
 	{ "DACL", NULL, "DACL Mixer" },
 	{ "DACR", NULL, "DACR Mixer" },
 
 	/* DAC Mixer Routes */
-	{ "DACL Mixer", "AIF1 Slot 0 Digital DAC Playback Switch", "AIF1 DA0L" },
+	{ "DACL Mixer", "AIF1 Slot 0 Digital DAC Playback Switch", "AIF1 DA0L Stereo Mux" },
 	{ "DACL Mixer", "ADC Digital DAC Playback Switch", "ADCL" },
 
-	{ "DACR Mixer", "AIF1 Slot 0 Digital DAC Playback Switch", "AIF1 DA0R" },
+	{ "DACR Mixer", "AIF1 Slot 0 Digital DAC Playback Switch", "AIF1 DA0R Stereo Mux" },
 	{ "DACR Mixer", "ADC Digital DAC Playback Switch", "ADCR" },
 };
 
 static const struct snd_soc_dapm_widget sun8i_codec_legacy_widgets[] = {
 	/* Legacy ADC Inputs (connected to analog codec DAPM context) */
 	SND_SOC_DAPM_ADC("AIF1 Slot 0 Left ADC", NULL, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_ADC("AIF1 Slot 0 Right ADC", NULL, SND_SOC_NOPM, 0, 0),
 
-- 
2.26.2

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