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Subject[v3] ASoC: AMD: Use mixer control to switch between DMICs
Date
Having mixer control to switch between DMICs prevents user to
initiate capture simultaneously on both the DMIcs.
Earlier 2 separate devices, one for each DMIC, gave an option of
using them simultaneously, which is not supported.

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
---
v2: Modified "Front Mic" to "DMIC Switch"
v3: Changed to using of Mux

sound/soc/amd/acp3x-rt5682-max9836.c | 58 +++++++++++++++-------------
1 file changed, 31 insertions(+), 27 deletions(-)

diff --git a/sound/soc/amd/acp3x-rt5682-max9836.c b/sound/soc/amd/acp3x-rt5682-max9836.c
index e499c00e0c66..f745b42dfd23 100644
--- a/sound/soc/amd/acp3x-rt5682-max9836.c
+++ b/sound/soc/amd/acp3x-rt5682-max9836.c
@@ -188,25 +188,27 @@ static int acp3x_ec_dmic0_startup(struct snd_pcm_substream *substream)

machine->cap_i2s_instance = I2S_BT_INSTANCE;
snd_soc_dai_set_bclk_ratio(codec_dai, 64);
- if (dmic_sel)
- gpiod_set_value(dmic_sel, 0);

return rt5682_clk_enable(substream);
}

-static int acp3x_ec_dmic1_startup(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct snd_soc_card *card = rtd->card;
- struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
- struct acp3x_platform_info *machine = snd_soc_card_get_drvdata(card);
+static int dmic_switch;

- machine->cap_i2s_instance = I2S_BT_INSTANCE;
- snd_soc_dai_set_bclk_ratio(codec_dai, 64);
- if (dmic_sel)
- gpiod_set_value(dmic_sel, 1);
+static int dmic_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ ucontrol->value.integer.value[0] = dmic_switch;
+ return 0;
+}

- return rt5682_clk_enable(substream);
+static int dmic_set(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ if (dmic_sel) {
+ dmic_switch = ucontrol->value.integer.value[0];
+ gpiod_set_value(dmic_sel, dmic_switch);
+ }
+ return 0;
}

static void rt5682_shutdown(struct snd_pcm_substream *substream)
@@ -229,11 +231,6 @@ static const struct snd_soc_ops acp3x_ec_cap0_ops = {
.shutdown = rt5682_shutdown,
};

-static const struct snd_soc_ops acp3x_ec_cap1_ops = {
- .startup = acp3x_ec_dmic1_startup,
- .shutdown = rt5682_shutdown,
-};
-
SND_SOC_DAILINK_DEF(acp3x_i2s,
DAILINK_COMP_ARRAY(COMP_CPU("acp3x_i2s_playcap.0")));
SND_SOC_DAILINK_DEF(acp3x_bt,
@@ -279,21 +276,26 @@ static struct snd_soc_dai_link acp3x_dai_5682_98357[] = {
.ops = &acp3x_ec_cap0_ops,
SND_SOC_DAILINK_REG(acp3x_bt, cros_ec, platform),
},
- {
- .name = "acp3x-ec-dmic1-capture",
- .stream_name = "Capture DMIC1",
- .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
- | SND_SOC_DAIFMT_CBS_CFS,
- .dpcm_capture = 1,
- .ops = &acp3x_ec_cap1_ops,
- SND_SOC_DAILINK_REG(acp3x_bt, cros_ec, platform),
- },
};

+static const char * const dmic_mux_text[] = {
+ "Front Mic",
+ "Rear Mic",
+};
+
+static SOC_ENUM_SINGLE_DECL(
+ acp3x_dmic_enum, SND_SOC_NOPM, 0, dmic_mux_text);
+
+static const struct snd_kcontrol_new acp3x_dmic_mux_control =
+ SOC_DAPM_ENUM_EXT("DMIC Select Mux", acp3x_dmic_enum,
+ dmic_get, dmic_set);
+
static const struct snd_soc_dapm_widget acp3x_widgets[] = {
SND_SOC_DAPM_HP("Headphone Jack", NULL),
SND_SOC_DAPM_SPK("Spk", NULL),
SND_SOC_DAPM_MIC("Headset Mic", NULL),
+ SND_SOC_DAPM_MUX("Dmic Mux", SND_SOC_NOPM, 0, 0,
+ &acp3x_dmic_mux_control),
};

static const struct snd_soc_dapm_route acp3x_audio_route[] = {
@@ -301,6 +303,8 @@ static const struct snd_soc_dapm_route acp3x_audio_route[] = {
{"Headphone Jack", NULL, "HPOR"},
{"IN1P", NULL, "Headset Mic"},
{"Spk", NULL, "Speaker"},
+ {"Dmic Mux", "Front Mic", "DMIC"},
+ {"Dmic Mux", "Rear Mic", "DMIC"},
};

static const struct snd_kcontrol_new acp3x_mc_controls[] = {
--
2.20.1
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