linux-kernel - [PATCH v2 8/8] ASoC: sun50i-codec-analog: Enable DAPM for earpiece switch

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Date:   Sat, 25 Jul 2020 21:53:34 -0500
From:   Samuel Holland <samuel@...lland.org>
To:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>
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 v2 8/8] ASoC: sun50i-codec-analog: Enable DAPM for earpiece switch

By including the earpiece mute switch in the DAPM graph, both the
earpiece amplifier and the Mixer/DAC inputs can be powered off when
the earpiece is muted.

While the widget is really just a simple switch, it is represented
as a "mixer with named controls" to avoid including the widget name
in the kcontrol name. Otherwise, it is not possible to give the widget
an accurate, descriptive name without changing the kcontrol name
seen by userspace (which should be stable).

The mute switch is between the source selection and the amplifier,
as per the diagram in the SoC manual.

Signed-off-by: Samuel Holland <samuel@...lland.org>
---
 sound/soc/sunxi/sun50i-codec-analog.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/sound/soc/sunxi/sun50i-codec-analog.c b/sound/soc/sunxi/sun50i-codec-analog.c
index 84bb76cad74f..a41e25ad0aaf 100644
--- a/sound/soc/sunxi/sun50i-codec-analog.c
+++ b/sound/soc/sunxi/sun50i-codec-analog.c
@@ -232,11 +232,6 @@ static const struct snd_kcontrol_new sun50i_a64_codec_controls[] = {
 		       SUN50I_ADDA_EARPIECE_CTRL1,
 		       SUN50I_ADDA_EARPIECE_CTRL1_ESP_VOL, 0x1f, 0,
 		       sun50i_codec_earpiece_vol_scale),
-
-	SOC_SINGLE("Earpiece Playback Switch",
-		   SUN50I_ADDA_EARPIECE_CTRL1,
-		   SUN50I_ADDA_EARPIECE_CTRL1_ESPPA_MUTE, 1, 0),
-
 };
 
 static const char * const sun50i_codec_hp_src_enum_text[] = {
@@ -295,6 +290,12 @@ static const struct snd_kcontrol_new sun50i_codec_earpiece_src[] = {
 		      sun50i_codec_earpiece_src_enum),
 };
 
+static const struct snd_kcontrol_new sun50i_codec_earpiece_switch[] = {
+	SOC_DAPM_SINGLE("Earpiece Playback Switch",
+			SUN50I_ADDA_EARPIECE_CTRL1,
+			SUN50I_ADDA_EARPIECE_CTRL1_ESPPA_MUTE, 1, 0),
+};
+
 static const struct snd_soc_dapm_widget sun50i_a64_codec_widgets[] = {
 	/* DAC */
 	SND_SOC_DAPM_DAC("Left DAC", NULL, SUN50I_ADDA_MIX_DAC_CTRL,
@@ -341,6 +342,9 @@ static const struct snd_soc_dapm_widget sun50i_a64_codec_widgets[] = {
 
 	SND_SOC_DAPM_MUX("Earpiece Source Playback Route",
 			 SND_SOC_NOPM, 0, 0, sun50i_codec_earpiece_src),
+	SOC_MIXER_NAMED_CTL_ARRAY("Earpiece Switch",
+				  SND_SOC_NOPM, 0, 0,
+				  sun50i_codec_earpiece_switch),
 	SND_SOC_DAPM_OUT_DRV("Earpiece Amp", SUN50I_ADDA_EARPIECE_CTRL1,
 			     SUN50I_ADDA_EARPIECE_CTRL1_ESPPA_EN, 0, NULL, 0),
 	SND_SOC_DAPM_OUTPUT("EARPIECE"),
@@ -462,7 +466,8 @@ static const struct snd_soc_dapm_route sun50i_a64_codec_routes[] = {
 	{ "Earpiece Source Playback Route", "DACR", "Right DAC" },
 	{ "Earpiece Source Playback Route", "Left Mixer", "Left Mixer" },
 	{ "Earpiece Source Playback Route", "Right Mixer", "Right Mixer" },
-	{ "Earpiece Amp", NULL, "Earpiece Source Playback Route" },
+	{ "Earpiece Switch", "Earpiece Playback Switch", "Earpiece Source Playback Route" },
+	{ "Earpiece Amp", NULL, "Earpiece Switch" },
 	{ "EARPIECE", NULL, "Earpiece Amp" },
 };
 
-- 
2.26.2